US20120019057A9 - Wireless power transfer for vehicles - Google Patents
Wireless power transfer for vehicles Download PDFInfo
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- US20120019057A9 US20120019057A9 US12/572,400 US57240009A US2012019057A9 US 20120019057 A9 US20120019057 A9 US 20120019057A9 US 57240009 A US57240009 A US 57240009A US 2012019057 A9 US2012019057 A9 US 2012019057A9
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Classifications
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- H04B5/79—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/50—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/50—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices
- H02J50/502—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices the energy repeater being integrated together with the emitter or the receiver
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
Definitions
- each battery powered device such as a wireless electronic device requires its own charger and power source, which is usually an alternating current (AC) power outlet.
- AC alternating current
- FIG. 1 shows a simplified block diagram of a wireless power transfer system.
- FIG. 2 shows a simplified schematic diagram of a wireless power transfer system.
- FIG. 3 shows a schematic diagram of a loop antenna for use in exemplary embodiments of the present invention.
- FIG. 4 shows simulation results indicating coupling strength between transmit and receive antennas.
- FIGS. 5A and 5B show layouts of loop antennas for transmit and receive antennas according to exemplary embodiments of the present invention.
- FIG. 6 shows simulation results indicating coupling strength between transmit and receive antennas relative to various circumference sizes for the square and circular transmit antennas illustrated in FIGS. 5A and 5B .
- FIG. 7 shows simulation results indicating coupling strength between transmit and receive antennas relative to various surface areas for the square and circular transmit antennas illustrated in FIGS. 5A and 5B .
- FIG. 8 shows various placement points for a receive antenna relative to a transmit antenna to illustrate coupling strengths in coplanar and coaxial placements.
- FIG. 9 shows simulation results indicating coupling strength for coaxial placement at various distances between the transmit and receive antennas.
- FIG. 10 is a simplified block diagram of a transmitter, in accordance with an exemplary embodiment of the present invention.
- FIG. 11 is a simplified block diagram of a receiver, in accordance with an exemplary embodiment of the present invention.
- FIG. 12 shows a simplified schematic of a portion of transmit circuitry for carrying out messaging between a transmitter and a receiver.
- FIGS. 13A-13C shows a simplified schematic of a portion of receive circuitry in various states to illustrate messaging between a receiver and a transmitter.
- FIGS. 14A-14C shows a simplified schematic of a portion of alternative receive circuitry in various states to illustrate messaging between a receiver and a transmitter.
- FIGS. 15A-15D are simplified block diagrams illustrating a beacon power mode for transmitting power between a transmitter and a receiver.
- FIG. 16A illustrates a large transmit antenna with a smaller repeater antenna disposed coplanar with, and coaxial with, the transmit antenna.
- FIG. 16B illustrates a transmit antenna with a larger repeater antenna with a coaxial placement relative to the transmit antenna.
- FIG. 17A illustrates a large transmit antenna with a three different smaller repeater antennas disposed coplanar with, and within a perimeter of, the transmit antenna.
- FIG. 17B illustrates a large transmit antenna with smaller repeater antennas with offset coaxial placements and offset coplanar placements relative to the transmit antenna.
- FIG. 18 shows simulation results indicating coupling strength between a transmit antenna, a repeater antenna and a receive antenna.
- FIG. 19A shows simulation results indicating coupling strength between a transmit antenna and receive antenna with no repeater antennas.
- FIG. 19B shows simulation results indicating coupling strength between a transmit antenna and receive antenna with a repeater antenna.
- FIG. 20 is a simplified block diagram of a transmitter according to one or more exemplary embodiments of the present invention.
- FIG. 21 is a simplified block diagram of a multiple transmit antenna wireless charging apparatus, in accordance with an exemplary embodiment of the present invention.
- FIG. 22 is a simplified block diagram of a multiple transmit antenna wireless charging apparatus, in accordance with another exemplary embodiment of the present invention.
- FIGS. 23A-23C illustrate an exemplary embodiment of an item bearing transmit antennas oriented in multiple directions.
- FIGS. 24A and 24B illustrate an exemplary embodiment of a cabinet bearing transmit antennas oriented in multiple directions.
- FIG. 25 illustrates an exemplary embodiment of an antenna disposed in or on a section of an automobile dashboard.
- FIG. 26 illustrates an exemplary embodiment of an antenna in or on an automobile console.
- FIG. 27 illustrates an exemplary embodiment of an antenna disposed in or on a floor mat for an automobile.
- FIGS. 28A and 28B illustrate an exemplary embodiment of an antenna disposed in or on an automobile storage bin.
- FIGS. 29A and 29B illustrate an exemplary embodiment of an automobile storage bin including transmit antennas oriented in multiple directions.
- FIG. 30 illustrates an exemplary embodiment of an antenna disposed in or on a storage bag draped over a back of a seat of an automobile.
- FIG. 31 illustrates an exemplary embodiment of an antenna disposed in or on stowable surface in a vehicle.
- FIG. 32 is a simplified flow chart illustrating acts that may be performed in one or more exemplary embodiments of the present invention.
- FIG. 1 illustrates wireless transmission or charging system 100 , in accordance with various exemplary embodiments of the present invention.
- Input power 102 is provided to a transmitter 104 for generating a radiated field 106 for providing energy transfer.
- a receiver 108 couples to the radiated field 106 and generates an output power 110 for storing or consumption by a device (not shown) coupled to the output power 110 .
- Both the transmitter 104 and the receiver 108 are separated by a distance 112 .
- FIG. 2 shows a simplified schematic diagram of a wireless power transfer system.
- the transmitter 104 includes an oscillator 122 , a power amplifier 124 and a filter and matching circuit 126 .
- the oscillator is configured to generate at a desired frequency, which may be adjusted in response to adjustment signal 123 .
- the oscillator signal may be amplified by the power amplifier 124 with an amplification amount responsive to control signal 125 .
- the filter and matching circuit 126 may be included to filter out harmonics or other unwanted frequencies and match the impedance of the transmitter 104 to the transmit antenna 114 .
- the receiver may include a matching circuit 132 and a rectifier and switching circuit to generate a DC power output to charge a battery 136 as shown in FIG. 2 or power a device coupled to the receiver (not shown).
- the matching circuit 132 may be included to match the impedance of the receiver 108 to the receive antenna 118 .
- antennas used in exemplary embodiments may be configured as a “loop” antenna 150 , which may also be referred to herein as a “magnetic” antenna.
- Loop antennas may be configured to include an air core or a physical core such as a ferrite core. Air core loop antennas may be more tolerable to extraneous physical devices placed in the vicinity of the core. Furthermore, an air core loop antenna allows the placement of other components within the core area. In addition, an air core loop may more readily enable placement of the receive antenna 118 ( FIG. 2 ) within a plane of the transmit antenna 114 ( FIG. 2 ) where the coupled-mode region of the transmit antenna 114 ( FIG. 2 ) may be more powerful.
- the resonant frequency of the loop or magnetic antennas is based on the inductance and capacitance.
- Inductance in a loop antenna is generally simply the inductance created by the loop, whereas, capacitance is generally added to the loop antenna's inductance to create a resonant structure at a desired resonant frequency.
- capacitor 152 and capacitor 154 may be added to the antenna to create a resonant circuit that generates resonant signal 156 . Accordingly, for larger diameter loop antennas, the size of capacitance needed to induce resonance decreases as the diameter or inductance of the loop increases. Furthermore, as the diameter of the loop or magnetic antenna increases, the efficient energy transfer area of the near-field increases.
- resonant circuits are possible.
- a capacitor may be placed in parallel between the two terminals of the loop antenna.
- the resonant signal 156 may be an input to the loop antenna 150 .
- Exemplary embodiments of the invention include coupling power between two antennas that are in the near-fields of each other.
- the near-field is an area around the antenna in which electromagnetic fields exist but may not propagate or radiate away from the antenna. They are typically confined to a volume that is near the physical volume of the antenna.
- magnetic type antennas such as single and multi-turn loop antennas are used for both transmit (Tx) and receive (Rx) antenna systems since magnetic near-field amplitudes tend to be higher for magnetic type antennas in comparison to the electric near-fields of an electric-type antenna (e.g., a small dipole). This allows for potentially higher coupling between the pair.
- “electric” antennas e.g., dipoles and monopoles
- a combination of magnetic and electric antennas is also contemplated.
- the Tx antenna can be operated at a frequency that is low enough and with an antenna size that is large enough to achieve good coupling (e.g., > ⁇ 4 dB) to a small Rx antenna at significantly larger distances than allowed by far field and inductive approaches mentioned earlier. If the Tx antenna is sized correctly, high coupling levels (e.g., ⁇ 2 to ⁇ 4 dB) can be achieved when the Rx antenna on a host device is placed within a coupling-mode region (i.e., in the near-field) of the driven Tx loop antenna.
- a coupling-mode region i.e., in the near-field
- FIG. 4 shows simulation results indicating coupling strength between transmit and receive antennas.
- Curves 170 and 172 indicate a measure of acceptance of power by the transmit and receive antennas, respectively. In other words, with a large negative number there is a very close impedance match and most of the power is accepted and, as a result, radiated by the transmit antenna. Conversely, a small negative number indicates that much of the power is reflected back from the antenna because there is not a close impedance match at the given frequency.
- the transmit antenna and the receive antenna are tuned to have a resonant frequency of about 13.56 MHz.
- Curve 170 illustrates the amount of power transmitted from the transmit antenna at various frequencies. Thus, at points 1 a and 3 a , corresponding to about 13.528 MHz and 13.593 MHz, much of the power is reflected and not transmitted out of the transmit antenna. However, at point 2 a , corresponding to about 13.56 MHz, it can be seen that a large amount of the power is accepted and transmitted out of the antenna.
- curve 172 illustrates the amount of power received by the receive antenna at various frequencies.
- points 1 b and 3 b corresponding to about 13.528 MHz and 13.593 MHz, much of the power is reflected and not conveyed through the receive antenna and into the receiver.
- point 2 b corresponding to about 13.56 MHz, it can be seen that a large amount of the power is accepted by the receive antenna and conveyed into the receiver.
- Curve 174 indicates the amount of power received at the receiver after being sent from the transmitter through the transmit antenna, received through the receive antenna and conveyed to the receiver.
- Curve 174 indicates the amount of power received at the receiver after being sent from the transmitter through the transmit antenna, received through the receive antenna and conveyed to the receiver.
- FIGS. 5A and 5B show layouts of loop antennas for transmit and receive antennas according to exemplary embodiments of the present invention.
- Loop antennas may be configured in a number of different ways, with single loops or multiple loops at wide variety of sizes.
- the loops may be a number of different shapes, such as, for example only, circular, elliptical, square, and rectangular.
- FIG. 5A illustrates a large square loop transmit antenna 114 S and a small square loop receive antenna 118 placed in the same plane as the transmit antenna 114 S and near the center of the transmit antenna 114 S.
- FIG. 6 shows simulation results indicating coupling strength between transmit and receive antennas relative to various circumferences for the square and circular transmit antennas illustrated in FIGS. 4A and 4B .
- curve 180 shows coupling strength between the circular loop transmit antennas 114 C and the receive antenna 118 at various circumference sizes for the circular loop transmit antenna 114 C.
- curve 182 shows coupling strength between the square loop transmit antennas 114 S and the receive antenna 118 ′ at various equivalent circumference sizes for the transmit loop transmit antenna 114 S.
- FIG. 7 shows simulation results indicating coupling strength between transmit and receive antennas relative to various surface areas for the square and circular transmit antennas illustrated in FIGS. 5A and 5B .
- curve 190 shows coupling strength between the circular loop transmit antennas 114 C and the receive antenna 118 at various surface areas for the circular loop transmit antenna 114 C.
- curve 192 shows coupling strength between the square loop transmit antennas 114 S and the receive antenna 118 ′ at various surface areas for the transmit loop transmit antenna 114 S.
- FIG. 8 shows various placement points for a receive antenna relative to a transmit antenna to illustrate coupling strengths in coplanar and coaxial placements.
- “Coplanar,” as used herein, means that the transmit antenna and receive antenna have planes that are substantially aligned (i.e., have surface normals pointing in substantially the same direction) and with no distance (or a small distance) between the planes of the transmit antenna and the receive antenna.
- “Coaxial,” as used herein, means that the transmit antenna and receive antenna have planes that are substantially aligned (i.e., have surface normals pointing in substantially the same direction) and the distance between the two planes is not trivial and furthermore, the surface normal of the transmit antenna and the receive antenna lie substantially along the same vector, or the two normals are in echelon.
- points p 1 , p 2 , p 3 , and p 7 are all coplanar placement points for a receive antenna relative to a transmit antenna.
- point p 5 and p 6 are coaxial placement points for a receive antenna relative to a transmit antenna.
- the table below shows coupling strength (S 21 ) and coupling efficiency (expressed as a percentage of power transmitted from the transmit antenna that reached the receive antenna) at the various placement points (p 1 -p 7 ) illustrated in FIG. 8 .
- the coplanar placement points p 1 , p 2 , and p 3 all show relatively high coupling efficiencies.
- Placement point p 7 is also a coplanar placement point, but is outside of the transmit loop antenna. While placement point p 7 does not have a high coupling efficiency, it is clear that there is some coupling and the coupling-mode region extends beyond the perimeter of the transmit loop antenna.
- Placement point p 6 illustrates a placement point outside the circumference of the transmit antenna and at a substantial distance above the plane of the transmit antenna. As can be seen from the table, placement point p 7 shows little coupling efficiency between the transmit and receive antennas.
- FIG. 9 shows simulation results indicating coupling strength for coaxial placement at various distances between the transmit and receive antennas.
- the simulations for FIG. 9 are for square transmit and receive antennas in a coaxial placement, both with sides of about 1.2 meters and at a transmit frequency of 10 MHz. It can be seen that the coupling strength remains quite high and uniform at distances of less than about 0.5 meters.
- Transmit circuitry 202 further includes a processor 214 for enabling the oscillator 212 during transmit phases (or duty cycles) for specific receivers, for adjusting the frequency of the oscillator, and for adjusting the output power level for implementing a communication protocol for interacting with neighboring devices through their attached receivers.
- the transmit circuitry 202 may further include a load sensing circuit 216 for detecting the presence or absence of active receivers in the vicinity of the near-field generated by transmit antenna 204 .
- a load sensing circuit 216 monitors the current flowing to the power amplifier 210 , which is affected by the presence or absence of active receivers in the vicinity of the near-field generated by transmit antenna 204 . Detection of changes to the loading on the power amplifier 210 are monitored by processor 214 for use in determining whether to enable the oscillator 212 for transmitting energy to communicate with an active receiver.
- Transmit antenna 204 may be implemented as an antenna strip with the thickness, width and metal type selected to keep resistive losses low.
- the transmit antenna 204 can generally be configured for association with a larger structure such as a table, mat, lamp or other less portable configuration. Accordingly, the transmit antenna 204 generally will not need “turns” in order to be of a practical dimension.
- An exemplary implementation of a transmit antenna 204 may be “electrically small” (i.e., fraction of the wavelength) and tuned to resonate at lower usable frequencies by using capacitors to define the resonant frequency.
- the transmit antenna 204 may be larger in diameter, or length of side if a square loop, (e.g., 0.50 meters) relative to the receive antenna, the transmit antenna 204 will not necessarily need a large number of turns to obtain a reasonable capacitance.
- FIG. 11 is a block diagram of a receiver, in accordance with an exemplary embodiment of the present invention.
- a receiver 300 includes receive circuitry 302 and a receive antenna 304 . Receiver 300 further couples to device 350 for providing received power thereto. It should be noted that receiver 300 is illustrated as being external to device 350 but may be integrated into device 350 . Generally, energy is propagated wirelessly to receive antenna 304 and then coupled through receive circuitry 302 to device 350 .
- Receive antenna 304 is tuned to resonate at the same frequency, or near the same frequency, as transmit antenna 204 ( FIG. 10 ). Receive antenna 304 may be similarly dimensioned with transmit antenna 204 or may be differently sized based upon the dimensions of an associated device 350 .
- device 350 may be a portable electronic device having diametric or length dimension smaller that the diameter of length of transmit antenna 204 .
- receive antenna 304 may be implemented as a multi-turn antenna in order to reduce the capacitance value of a tuning capacitor (not shown) and increase the receive antenna's impedance.
- receive antenna 304 may be placed around the substantial circumference of device 350 in order to maximize the antenna diameter and reduce the number of loop turns (i.e., windings) of the receive antenna and the inter-winding capacitance.
- Receive circuitry 302 provides an impedance match to the receive antenna 304 .
- Receive circuitry 302 includes power conversion circuitry 306 for converting a received RF energy source into charging power for use by device 350 .
- Power conversion circuitry 306 includes an RF-to-DC converter 308 and may also in include a DC-to-DC converter 310 .
- RF-to-DC converter 308 rectifies the RF energy signal received at receive antenna 304 into a non-alternating power while DC-to-DC converter 310 converts the rectified RF energy signal into an energy potential (e.g., voltage) that is compatible with device 350 .
- Various RF-to-DC converters are contemplated including partial and full rectifiers, regulators, bridges, doublers, as well as linear and switching converters.
- Receive circuitry 302 may further include switching circuitry 312 for connecting receive antenna 304 to the power conversion circuitry 306 or alternatively for disconnecting the power conversion circuitry 306 . Disconnecting receive antenna 304 from power conversion circuitry 306 not only suspends charging of device 350 , but also changes the “load” as “seen” by the transmitter 200 ( FIG. 2 ) as is explained more fully below.
- transmitter 200 includes load sensing circuit 216 which detects fluctuations in the bias current provided to transmitter power amplifier 210 . Accordingly, transmitter 200 has a mechanism for determining when receivers are present in the transmitter's near-field.
- a receiver When multiple receivers 300 are present in a transmitter's near-field, it may be desirable to time-multiplex the loading and unloading of one or more receivers to enable other receivers to more efficiently couple to the transmitter.
- a receiver may also be cloaked in order to eliminate coupling to other nearby receivers or to reduce loading on nearby transmitters.
- This “unloading” of a receiver is also known herein as a “cloaking”
- this switching between unloading and loading controlled by receiver 300 and detected by transmitter 200 provides a communication mechanism from receiver 300 to transmitter 200 as is explained more fully below.
- a protocol can be associated with the switching which enables the sending of a message from receiver 300 to transmitter 200 .
- a switching speed may be on the order of 100 ⁇ sec.
- communication between the transmitter and the receiver refers to a device sensing and charging control mechanism, rather than conventional two-way communication.
- the transmitter uses on/off keying of the transmitted signal to adjust whether energy is available in the near-filed.
- the receivers interpret these changes in energy as a message from the transmitter.
- the receiver uses tuning and de-tuning of the receive antenna to adjust how much power is being accepted from the near-field.
- the transmitter can detect this difference in power used from the near-field and interpret these changes as a message from the receiver.
- Receive circuitry 302 may further include signaling detector and beacon circuitry 314 used to identify received energy fluctuations, which may correspond to informational signaling from the transmitter to the receiver. Furthermore, signaling and beacon circuitry 314 may also be used to detect the transmission of a reduced RF signal energy (i.e., a beacon signal) and to rectify the reduced RF signal energy into a nominal power for awakening either un-powered or power-depleted circuits within receive circuitry 302 in order to configure receive circuitry 302 for wireless charging.
- signaling detector and beacon circuitry 314 used to identify received energy fluctuations, which may correspond to informational signaling from the transmitter to the receiver. Furthermore, signaling and beacon circuitry 314 may also be used to detect the transmission of a reduced RF signal energy (i.e., a beacon signal) and to rectify the reduced RF signal energy into a nominal power for awakening either un-powered or power-depleted circuits within receive circuitry 302 in order to configure receive circuitry 302 for wireless charging.
- a reduced RF signal energy i.
- Receive circuitry 302 further includes processor 316 for coordinating the processes of receiver 300 described herein including the control of switching circuitry 312 described herein. Cloaking of receiver 300 may also occur upon the occurrence of other events including detection of an external wired charging source (e.g., wall/USB power) providing charging power to device 350 .
- Processor 316 in addition to controlling the cloaking of the receiver, may also monitor beacon circuitry 314 to determine a beacon state and extract messages sent from the transmitter. Processor 316 may also adjust DC-to-DC converter 310 for improved performance.
- FIG. 12 shows a simplified schematic of a portion of transmit circuitry for carrying out messaging between a transmitter and a receiver.
- a means for communication may be enabled between the transmitter and the receiver.
- a power amplifier 210 drives the transmit antenna 204 to generate the radiated field.
- the power amplifier is driven by a carrier signal 220 that is oscillating at a desired frequency for the transmit antenna 204 .
- a transmit modulation signal 224 is used to control the output of the power amplifier 210 .
- the transmit circuitry can send signals to receivers by using an ON/OFF keying process on the power amplifier 210 .
- the transmit modulation signal 224 when the transmit modulation signal 224 is asserted, the power amplifier 210 will drive the frequency of the carrier signal 220 out on the transmit antenna 204 .
- the transmit modulation signal 224 When the transmit modulation signal 224 is negated, the power amplifier will not drive out any frequency on the transmit antenna 204 .
- FIGS. 13A-13C shows a simplified schematic of a portion of receive circuitry in various states to illustrate messaging between a receiver and a transmitter. All of FIGS. 13A-13C show the same circuit elements with the difference being state of the various switches.
- a receive antenna 304 includes a characteristic inductance L 1 , which drives node 350 .
- Node 350 is selectively coupled to ground through switch S 1 A.
- Node 350 is also selectively coupled to diode D 1 and rectifier 318 through switch SIB.
- the rectifier 318 supplies a DC power signal 322 to a receive device (not shown) to power the receive device, charge a battery, or a combination thereof.
- the diode D 1 is coupled to a transmit signal 320 which is filtered to remove harmonics and unwanted frequencies with capacitor C 3 and resistor R 1 .
- the combination of D 1 , C 3 , and R 1 can generate a signal on the transmit signal 320 that mimics the transmit modulation generated by the transmit modulation signal 224 discussed above with reference to the transmitter in FIG. 12 .
- Exemplary embodiments of the invention includes modulation of the receive device's current draw and modulation of the receive antenna's impedance to accomplish reverse link signaling.
- the load sensing circuit 216 detects the resulting power changes on the transmit antenna and from these changes can generate the receive signal 235 .
- the current draw through the transmitter can be changed by modifying the state of switches S 1 A and S 2 A.
- switch S 1 A and switch S 2 A are both open creating a “DC open state” and essentially removing the load from the transmit antenna 204 . This reduces the current seen by the transmitter.
- switch S 1 A is closed and switch S 2 A is open creating a “DC short state” for the receive antenna 304 .
- the state in FIG. 13B can be used to increase the current seen in the transmitter.
- switch S 1 A is open and switch S 2 A is closed creating a normal receive mode (also referred to herein as a “DC operating state”) wherein power can be supplied by the DC out signal 322 and a transmit signal 320 can be detected.
- a normal receive mode also referred to herein as a “DC operating state”
- the receiver receives a normal amount of power, thus consuming more or less power from the transmit antenna than the DC open state or the DC short state.
- Reverse link signaling may be accomplished by switching between the DC operating state ( FIG. 13C ) and the DC short state ( FIG. 13B ). Reverse link signaling also may be accomplished by switching between the DC operating state ( FIG. 13C ) and the DC open state ( FIG. 13A ).
- FIGS. 14A-14C shows a simplified schematic of a portion of alternative receive circuitry in various states to illustrate messaging between a receiver and a transmitter.
- a receive antenna 304 includes a characteristic inductance L 1 , which drives node 350 .
- Node 350 is selectively coupled to ground through capacitor C 1 and switch SIB.
- Node 350 is also AC coupled to diode D 1 and rectifier 318 through capacitor C 2 .
- the diode D 1 is coupled to a transmit signal 320 which is filtered to remove harmonics and unwanted frequencies with capacitor C 3 and resistor R 1 .
- the combination of D 1 , C 3 , and R 1 can generate a signal on the transmit signal 320 that mimics the transmit modulation generated by the transmit modulation signal 224 discussed above with reference to the transmitter in FIG. 12 .
- the DC impedance of the receive antenna 304 is changed by selectively coupling the receive antenna to ground through switch SIB.
- the impedance of the antenna can be modified to generate the reverse link signaling by modifying the state of switches S 1 B, S 2 B, and S 3 B to change the AC impedance of the receive antenna 304 .
- the resonant frequency of the receive antenna 304 may be tuned with capacitor C 2 .
- the AC impedance of the receive antenna 304 may be changed by selectively coupling the receive antenna 304 through capacitor C 1 using switch S 1 B, essentially changing the resonance circuit to a different frequency that will be outside of a range that will optimally couple with the transmit antenna. If the resonance frequency of the receive antenna 304 is near the resonant frequency of the transmit antenna, and the receive antenna 304 is in the near-field of the transmit antenna, a coupling mode may develop wherein the receiver can draw significant power from the radiated field 106 .
- switch S 1 B is closed, which de-tunes the antenna and creates an “AC cloaking state,” essentially “cloaking” the receive antenna 304 from detection by the transmit antenna 204 because the receive antenna does not resonate at the transmit antenna's frequency. Since the receive antenna will not be in a coupled mode, the state of switches S 2 B and S 3 B are not particularly important to the present discussion.
- switch S 1 B is open, switch S 2 B is closed, and switch S 3 B is open, creating a “tuned dummy-load state” for the receive antenna 304 .
- switch S 1 B is open, capacitor C 1 does not contribute to the resonance circuit and the receive antenna 304 in combination with capacitor C 2 will be in a resonance frequency that may match with the resonant frequency of the transmit antenna.
- the combination of switch S 3 B open and switch S 2 B closed creates a relatively high current dummy load for the rectifier, which will draw more power through the receive antenna 304 , which can be sensed by the transmit antenna.
- the transmit signal 320 can be detected since the receive antenna is in a state to receive power from the transmit antenna.
- switch S 1 B is open, switch S 2 B is open, and switch S 3 B is closed, creating a “tuned operating state” for the receive antenna 304 .
- switch S 1 B is open, capacitor C 1 does not contribute to the resonance circuit and the receive antenna 304 in combination with capacitor C 2 will be in a resonance frequency that may match with the resonant frequency of the transmit antenna.
- the combination of switch S 2 B open and switch S 3 B closed creates a normal operating state wherein power can be supplied by the DC out signal 322 and a transmit signal 320 can be detected.
- Reverse link signaling may be accomplished by switching between the tuned operating state ( FIG. 14C ) and the AC cloaking state ( FIG. 14A ). Reverse link signaling also may be accomplished by switching between the tuned dummy-load state ( FIG. 14B ) and the AC cloaking state ( FIG. 14A ). Reverse link signaling also may be accomplished by switching between the tuned operating state ( FIG. 14C ) and the tuned dummy-load state ( FIG. 14B ) because there will be a difference in the amount of power consumed by the receiver, which can be detected by the load sensing circuit in the transmitter.
- switches S 1 B, S 2 B, and S 3 B may be used to create cloaking, generate reverse link signaling and supplying power to the receive device.
- the switches S 1 A and S 1 B may be added to the circuits of FIGS. 14A-14C to create other possible combinations for cloaking, reverse link signaling, and supplying power to the receive device.
- signals may be sent from the transmitter to the receiver, as discussed above with reference to FIG. 12 .
- signals may be sent from the receiver to the transmitter, as discussed above with reference to FIGS. 13A-13C and 14 A- 14 C.
- FIGS. 15A-15D are simplified block diagrams illustrating a beacon power mode for transmitting power between a transmitter and a one or more receivers.
- FIG. 15A illustrates a transmitter 520 having a low power “beacon” signal 525 when there are no receive devices in the beacon coupling-mode region 510 .
- the beacon signal 525 may be, as a non-limiting example, such as in the range of ⁇ 10 to ⁇ 20 mW RF. This signal may be adequate to provide initial power to a device to be charged when it is placed in the coupling-mode region.
- FIG. 15B illustrates a receive device 530 placed within the beacon coupling-mode region 510 of the transmitter 520 transmitting the beacon signal 525 . If the receive device 530 is on and develops a coupling with the transmitter it will generate a reverse link coupling 535 , which is really just the receiver accepting power from the beacon signal 525 . This additional power, may be sensed by the load sensing circuit 216 ( FIG. 12 ) of the transmitter. As a result, the transmitter may go into a high power mode.
- FIG. 15C illustrates the transmitter 520 generating a high power signal 525 ′ resulting in a high power coupling-mode region 510 ′.
- the receive device 530 is accepting power and, as a result, generating the reverse link coupling 535 , the transmitter will remain in the high power state. While only one receive device 530 is illustrated, multiple receive devices 530 may be present in the coupling-mode region 510 . If there are multiple receive device 530 they will share the amount of power transmitted by the transmitter based on how well each receive device 530 is coupled. For example, the coupling efficiency may be different for each receive device 530 depending on where the device is placed within the coupling-mode region 510 as was explained above with reference to FIGS. 8 and 9 .
- FIG. 15D illustrates the transmitter 520 generating the beacon signal 525 even when a receive device 530 is in the beacon coupling-mode region 510 . This state may occur when the receive device 530 is shut off, or the device cloaks itself, perhaps because it does not need any more power.
- the receiver and transmitter may communicate on a separate communication channel (e.g., Bluetooth, zigbee, etc). With a separate communication channel, the transmitter may determine when to switch between beacon mode and high power mode, or create multiple power levels, based on the number of receive devices in the coupling-mode region 510 and their respective power requirements.
- a separate communication channel e.g., Bluetooth, zigbee, etc.
- one or more extra antennas are used that couple to the transmit antenna and receive antenna in the system.
- These extra antennas comprise repeater antennas, such as active or passive antennas.
- a passive antenna may include simply the antenna loop and a capacitive element for tuning a resonant frequency of the antenna.
- An active element may include, in addition to the antenna loop and one or more tuning capacitors, an amplifier for increasing the strength of a repeated near-field radiation.
- the combination of the transmit antenna and the repeater antennas in the power transfer system may be optimized such that coupling of power to very small receive antennas is enhanced based on factors such as termination loads, tuning components, resonant frequencies, and placement of the repeater antennas relative to the transmit antenna.
- a single transmit antenna exhibits a finite near-field coupling mode region. Accordingly, a user of a device charging through a receiver in the transmit antenna's near-field coupling mode region may require a considerable user access space that would be prohibitive or at least inconvenient. Furthermore, the coupling mode region may diminish quickly as a receive antenna moves away from the transmit antenna.
- a repeater antenna may refocus and reshape a coupling mode region from a transmit antenna to create a second coupling mode region around the repeater antenna, which may be better suited for coupling energy to a receive antenna. Discussed below in FIGS. 16A-19B are some non-limiting examples of embodiments including repeater antennas.
- FIG. 16B illustrates a transmit antenna 610 B with a larger repeater antenna 620 B with a coaxial placement relative to the transmit antenna 610 B.
- a device including a receive antenna 630 B is placed within the perimeter of the repeater antenna 620 B.
- the transmit antenna 610 B is formed around the lower edge circumference of a lamp shade 642 , while the repeater antenna 620 B is disposed on a table 640 .
- the near-field radiation may diminish relatively quickly relative to distance away from the plane of an antenna.
- the small receive antenna 630 B placed in a coaxial placement relative to the transmit antenna 610 B may be in a weak coupling mode region.
- the large repeater antenna 620 B placed coaxially with the transmit antenna 610 B may be able to reshape the coupled mode region of the transmit antenna 610 B to another coupled mode region in a different place around the repeater antenna 620 B.
- a relatively strong repeated near-field radiation is available for the receive antenna 630 B placed coplanar with the repeater antenna 620 B.
- FIG. 17A illustrates a large transmit antenna 610 C with three smaller repeater antennas 620 C disposed coplanar with, and within a perimeter of, the transmit antenna 610 C.
- the transmit antenna 610 C and repeater antennas 620 C are formed on a table 640 .
- Various devices including receive antennas 630 C are placed at various locations within the transmit antenna 610 C and repeater antennas 620 C.
- the exemplary embodiment of FIG. 17A may be able to refocus the coupling mode region generated by the transmit antenna 610 C into smaller and stronger repeated coupling mode regions around each of the repeater antennas 620 C. As a result, a relatively strong repeated near-field radiation is available for the receive antennas 630 C.
- receive antennas 630 C may be able to receive power from the near-field radiation of the transmit antenna 610 C as well as any nearby repeater antennas 620 C.
- receive antennas placed outside of any repeater antennas 620 C may be still be able to receive power from the near-field radiation of the transmit antenna 610 C as well as any nearby repeater antennas 620 C.
- FIG. 17B illustrates a large transmit antenna 610 D with smaller repeater antennas 620 D with offset coaxial placements and offset coplanar placements relative to the transmit antenna 610 D.
- a device including a receive antenna 630 D is placed within the perimeter of one of the repeater antennas 620 D.
- the transmit antenna 610 D may be disposed on a ceiling 646
- the repeater antennas 620 D may be disposed on a table 640 .
- the repeater antennas 620 D in an offset coaxial placement may be able to reshape and enhance the near-field radiation from the transmitter antenna 610 D to repeated near-field radiation around the repeater antennas 620 D.
- a relatively strong repeated near-field radiation is available for the receive antenna 630 D placed coplanar with the repeater antennas 620 D.
- these antennas may also be disposed under surfaces (e.g., under a table, under a floor, behind a wall, or behind a ceiling), or within surfaces (e.g., a table top, a wall, a floor, or a ceiling).
- FIG. 18 shows simulation results indicating coupling strength between a transmit antenna, a repeater antenna and a receive antenna.
- the transmit antenna, the repeater antenna, and the receive antenna are tuned to have a resonant frequency of about 13.56 MHz.
- Curve 662 illustrates a measure for the amount of power transmitted from the transmit antenna out of the total power fed to the transmit antenna at various frequencies.
- curve 664 illustrates a measure for the amount of power received by the receive antenna through the repeater antenna out of the total power available in the vicinity of its terminals at various frequencies.
- Curve 668 illustrates the amount of power actually coupled between the transmit antenna, through the repeater antenna and into the receive antenna at various frequencies.
- FIG. 19A show simulation results indicating coupling strength between a transmit antenna and receive antenna disposed in a coaxial placement relative to the transmit antenna with no repeater antennas.
- the transmit antenna and the receive antenna are tuned to have a resonant frequency of about 10 MHz.
- the transmit antenna in this simulation is about 1.3 meters on a side and the receive antenna is a multi-loop antenna at about 30 mm on a side.
- the receive antenna is placed at about 2 meters away from the plane of the transmit antenna.
- Curve 682 A illustrates a measure for the amount of power transmitted from the transmit antenna out of the total power fed to its terminals at various frequencies.
- curve 684 A illustrates a measure of the amount of power received by the receive antenna out of the total power available in the vicinity of its terminals at various frequencies.
- Curve 686 A illustrates the amount of power actually coupled between the transmit antenna and the receive antenna at various frequencies.
- FIG. 19B show simulation results indicating coupling strength between the transmit and receive antennas of FIG. 19A when a repeater antenna is included in the system.
- the transmit antenna and receive antenna are the same size and placement as in FIG. 19A .
- the repeater antenna is about 28 cm on a side and placed coplanar with the receive antenna (i.e., about 0.1 meters away from the plane of the transmit antenna).
- Curve 682 B illustrates a measure of the amount of power transmitted from the transmit antenna out of the total power fed to its terminals at various frequencies.
- Curve 684 B illustrates the amount of power received by the receive antenna through the repeater antenna out of the total power available in the vicinity of its terminals at various frequencies.
- Curve 686 B illustrates the amount of power actually coupled between the transmit antenna, through the repeater antenna and into the receive antenna at various frequencies.
- Exemplary embodiments of the invention include low cost unobtrusive ways to properly manage how the transmitter radiates to single and multiple devices and device types in order to optimize the efficiency by which the transmitter conveys charging power to the individual devices.
- Exemplary embodiments of the invention include low cost unobtrusive ways to properly manage how the transmitter radiates to single and multiple devices and device types in order to optimize the efficiency by which the transmitter conveys charging power to the individual devices.
- FIG. 20 is a simplified block diagram of a transmitter 200 for use in vehicles 299 and other modes of transportation 299 .
- a vehicle may be an automobile, a truck, a train, an airplane, a boat, and other suitable means of transportation.
- the transmitter is similar to that of FIG. 10 and, therefore, does not need to be explained again.
- the transmitter 200 may include a presence detector 280 , an enclosed detector 290 , or a combination thereof, connected to the controller 214 (also referred to as a processor herein).
- the controller 214 may adjust an amount of power delivered by the amplifier 210 in response to presence signals from the presence detector 280 and the enclosed detector 290 .
- the transmitter may receive power through a number of power sources, such as, for example, an AC-DC converter (not shown) to convert conventional AC power present in a vehicle 299 , a DC-DC converter (not shown) to convert a conventional DC power source to a voltage suitable for the transmitter 200 , or directly from a conventional DC power source (not shown).
- a number of power sources such as, for example, an AC-DC converter (not shown) to convert conventional AC power present in a vehicle 299 , a DC-DC converter (not shown) to convert a conventional DC power source to a voltage suitable for the transmitter 200 , or directly from a conventional DC power source (not shown).
- the presence detector 280 may be a motion detector utilized to sense the initial presence of a device to be charged that is inserted into the coverage area of the transmitter. After detection, the transmitter is turned on and the RF power received by the device is used to toggle a switch on the Rx device in a pre-determined manner, which in turn results in changes to the driving point impedance of the transmitter.
- the presence detector 280 may be a detector capable of detecting a human, for example, by infrared detection, motion detection, or other suitable means.
- the controller 214 may adjust the power output of the transmit antenna 204 to a regulatory level or lower in response to human presence and adjust the power output of the transmit antenna 204 to a level above the regulatory level when a human is outside a regulatory distance from the electromagnetic field of the transmit antenna 204 .
- the enclosed detector 290 may also be referred to herein as an enclosed compartment detector or an enclosed space detector
- the enclosed detector 290 may be a device such as a sense switch for determining when an enclosure is in a closed or open state, as is explained more fully below.
- a sense switch for determining when an enclosure is in a closed or open state, as is explained more fully below.
- only one receiver device is shown being charged. In practice, a multiplicity of the devices can be charged from a near-field generated by each host.
- the transmitter 200 may be programmed to shut off after a user-determined amount of time.
- This feature prevents the transmitter 200 , notably the power amplifier, from running long after the wireless devices in its perimeter are fully charged. This event may be due to the failure of the circuit to detect the signal sent from either the repeater or the receive coil that a device is fully charged.
- the transmitter 200 automatic shut off feature may be activated only after a set period of lack of motion detected in its perimeter. The user may be able to determine the inactivity time interval, and change it as desired. As a non-limiting example, the time interval may be longer than that needed to fully charge a specific type of wireless device under the assumption of the device being initially fully discharged.
- Exemplary embodiments of the invention include using elements in vehicles and other modes of transportation such as storage bins, dashboards, stowable surfaces, consoles and storage bags to bear power transmitting devices housing totally, or partially, the transmit antenna and other circuitry necessary for wireless transfer of power to other often smaller receiver devices.
- the power transmitting devices may be partially or fully embedded in the aforementioned vehicles and vehicle elements, such as at the time of manufacture.
- the power transmitting devices may also be retrofitted into existing vehicle elements by attaching the transmit antenna thereto.
- vehicle elements are referred to herein as existing vehicle items.
- attachment may mean affixing the antenna to a an existing vehicle item, such as, for example, a wall or the underside of a compartment so the transmit antenna is held in place. Attachment may also mean simply placing the transmit antenna in a position where it will naturally be held in place, such as, for example, in the bottom of a compartment or on a dashboard.
- Electrically small antennas have low efficiency, often no more than a few percent as explained by the theory of small antennas.
- the wireless power transfer can become a viable technique replacing wired connection to the electric grid in industrial, commercial, and household applications if power can be sent over meaningful distances to the devices that are in the receiving end of such power transfer system. While this distance is application dependent, a few tens of a centimeter to a few meters can be deemed a suitable range for most applications. Generally, this range reduces the effective frequency for the electric power in the interval between 5 MHz to 100 MHz.
- Exemplary embodiments of the invention include converting a variety of the vehicle elements to hosts that can transfer electric power wirelessly to guest devices either to charge their rechargeable batteries or to directly feed them.
- FIGS. 21 and 22 are plan views of block diagrams of a multiple transmit antenna wireless charging apparatus, in accordance with exemplary embodiments.
- locating a receiver in a near-field coupling mode region of a transmitter for engaging the receiver in wireless charging may be unduly burdensome by requiring accurate positioning of the receiver in the transmit antenna's near-field coupling mode region.
- locating a receiver in the near-field coupling mode region of a fixed-location transmit antenna may also be inaccessible by a user of a device coupled to the receiver especially when multiple receivers are respectively coupled to multiple user accessible devices (e.g., laptops, PDAs, wireless devices) where users need concurrent physical access to the devices.
- a single transmit antenna exhibits a finite near-field coupling mode region.
- a user of a device charging through a receiver in the transmit antenna's near-field coupling mode region may require a considerable user access space that would be prohibitive or at least inconvenient for another user of another device to also wirelessly charge within the same transmit antenna's near-field coupling mode region and also require separate user access space.
- covering a large automobile trunk area configured with a single transmit antenna may make it difficult to access devices in different areas of the trunk due to the local nature of the transmitters near-field coupling mode region.
- an exemplary embodiment of a multiple transmit antenna wireless charging apparatus 700 provides for placement of a plurality of adjacently located transmit antenna circuits 702 A- 702 D to define an enlarged wireless charging region 708 .
- a transmit antenna circuit includes a transmit antenna 710 having a diameter or side dimension, for example, of around 30-40 centimeters for providing uniform coupling to an receive antenna (not shown) that is associated with or fits in an electronic device (e.g., wireless device, handset, PDA, laptop, etc.).
- the transmit antenna circuit 702 As a unit or cell of the multiple transmit antenna wireless charging apparatus 700 , stacking or adjacently tiling these transmit antenna circuits 702 A- 702 D next to each other, for example, on substantially a single planar surface 704 (e.g., on a table top) allows for reorienting or increasing the charging region.
- the enlarged wireless charging region 708 results in an increased charging region for one or more devices.
- the multiple transmit antenna wireless charging apparatus 700 further includes a transmit power amplifier 720 for providing the driving signal to transmit antennas 710 .
- a transmit power amplifier 720 for providing the driving signal to transmit antennas 710 .
- the interfering adjacent transmit antennas 710 are “cloaked” to allow improved wireless charging efficiency of the activated transmit antenna 710 .
- the sequencing of activation of transmit antennas 710 in multiple transmit antenna wireless charging apparatus 700 may occur according to a time-domain based sequence.
- the output of transmit power amplifier 720 is coupled to a multiplexer 722 which time-multiplexes, according to control signal 724 from the transmitter processor, the output signal from the transmit power amplifier 720 to each of the transmit antennas 710 .
- transmit antenna circuit 702 may further include a transmitter cloaking circuit 714 for altering the resonant frequency of transmit antennas 710 .
- the transmitter cloaking circuit may be configured as a switching means (e.g. a switch) for shorting-out or altering the value of reactive elements, for example capacitor 716 , of the transmit antenna 710 .
- the switching means may be controlled by control signals 721 from the transmitter's processor.
- one of the transmit antennas 710 is activated and allowed to resonate while other of transmit antennas 710 are inhibited from resonating, and therefore inhibited from adjacently interfering with the activated transmit antenna 710 .
- the resonant frequency of transmit antenna 710 is altered to prevent resonant coupling from other transmit antennas 710 .
- Other techniques for altering the resonant frequency are also contemplated.
- each of the transmit antenna circuits 702 can determine the presence or absence of receivers within their respective near-field coupling mode regions with the transmitter processor choosing to activate ones of the transmit antenna circuits 702 when receivers are present and ready for wireless charging or forego activating ones of the transmit antenna circuits 702 when receivers are not present or not ready for wireless charging in the respective near-field coupling mode regions.
- the detection of present or ready receivers may occur according to the receiver detection signaling protocol described herein or may occur according to physical sensing of receivers such as motion sensing, pressure sensing, image sensing or other sensing techniques for determining the presence of a receiver within a transmit antenna's near-field coupling mode region.
- preferential activation of one or more transmit antenna circuits by providing an enhanced proportional duty cycle to at least one of the plurality of antenna circuits is also contemplated to be within the scope of the present invention.
- an exemplary embodiment of a multiple transmit antenna wireless charging apparatus 800 provides for placement of a plurality of adjacently located repeater antenna circuits 802 A- 802 D inside of a transmit antenna 801 defining an enlarged wireless charging region 808 .
- Transmit antenna 801 when driven by transmit power amplifier 820 , induces resonant coupling to each of the repeater antennas 810 A- 810 D.
- a repeater antenna 810 having a diameter or side dimension, for example, of around 30-40 centimeters provides uniform coupling to a receive antenna (not shown) that is associated with or affixed to an electronic device.
- repeater antenna circuit 802 As a unit or cell of the multiple transmit antenna wireless charging apparatus 800 , stacking or adjacently tiling these repeater antenna circuits 802 A- 802 D next to each other on substantially a single planar surface 804 (e.g., on a table top) allows for increasing or enlarging the charging region.
- the enlarged wireless charging region 808 results in an increased charging space for one or more devices.
- the multiple transmit antenna wireless charging apparatus 800 includes transmit power amplifier 820 for providing the driving signal to transmit antenna 801 .
- transmit power amplifier 820 for providing the driving signal to transmit antenna 801 .
- the interfering adjacent repeater antennas 810 are “cloaked” to allow improved wireless charging efficiency of the activated repeater antenna 810 .
- the sequencing of activation of repeater antennas 810 in multiple transmit antenna wireless charging apparatus 800 may occur according to a time-domain based sequence.
- the output of transmit power amplifier 820 is generally constantly coupled (except during receiver signaling as described herein) to transmit antenna 801 .
- the repeater antennas 810 are time-multiplexed according to control signals 821 from the transmitter processor.
- concurrent operation of directly or nearly adjacent repeater antenna circuits 802 may result in interfering effects between concurrently activated and physically nearby or adjacent other repeater antennas circuits 802 .
- repeater antenna circuit 802 my further include a repeater cloaking circuit 814 for altering the resonant frequency of repeater antennas 810 .
- the repeater cloaking circuit may be configured as a switching means (e.g. a switch) for shorting-out or altering the value of reactive elements, for example capacitor 816 , of the repeater antenna 810 .
- the switching means may be controlled by control signals 821 from the transmitter's processor.
- one of the repeater antennas 810 is activated and allowed to resonate while other of repeater antennas 810 are inhibited from resonating, and therefore adjacently interfering with the activated repeater antenna 810 .
- the resonant frequency of repeater antenna 810 is altered to prevent resonant coupling from other repeater antennas 810 .
- Other techniques for altering the resonant frequency are also contemplated.
- each of the repeater antenna circuits 802 can determine the presence or absence of receivers within their respective near-field coupling mode regions with the transmitter processor choosing to activate ones of the repeater antenna circuits 802 when receivers are present and ready for wireless charging or forego activating ones of the repeater antenna circuits 802 when receivers are not present or not ready for wireless charging in the respective near-field coupling mode regions.
- the detection of present or ready receivers may occur according to the receiver detection signaling protocol described herein or may occur according to physical sensing of receivers such as motion sensing, pressure sensing, image sensing or other sensing techniques for determining a receiver to be within a repeater antenna's near-field coupling mode region.
- the various exemplary embodiments of the multiple transmit antenna wireless charging apparatus 700 and 800 may further include time domain multiplexing of the input signal being coupled to transmit/repeater antennas 710 , 810 based upon asymmetrically allocating activation time slots to the transmit/repeater antennas based upon factors such as priority charging of certain receivers, varying quantities of receivers in different antennas' near-field coupling mode regions, power requirements of specific devices coupled to the receivers as well as other factors.
- FIGS. 21 and 22 illustrate multiple loops in a charging region that is substantially planar.
- multi-dimensional regions with multiple antennas may be performed by the techniques described herein.
- multi-dimensional wireless powering and charging may be employed, such as the means described in U.S. patent application Ser. No. 12/567,339, entitled “SYSTEMS AND METHOD RELATING TO MULTI-DIMENSIONAL WIRELESS CHARGING” filed on Sep. 25, 2009, the contents of which are hereby incorporated by reference in its entirety for all purposes.
- the orientation between the receiver and the wireless charging apparatus transmit antenna(s) may vary.
- a wireless charging apparatus e.g. near-field magnetic resonance, inductive coupling, etc.
- the orientation between the receiver and the wireless charging apparatus transmit antenna(s) may vary.
- the angle in which the device lands on the bottom of the container would depend on the way its mass is distributed.
- careless placement of the device, while convenient may not guarantee the useful positioning of the device with respect to the wireless charging apparatus.
- the wireless charging apparatus may also be integrated into a large container or cabinet that can hold many devices, such as a glove box, a console, a baggage trunk, a container in a vehicle for professional equipment (e.g. field technician equipment) or an enclosure designed specifically for wireless charging.
- the receiver integration into these devices may be inconsistent because the devices have different form factors and may be placed in different orientations relative to the wireless power transmitter.
- wireless charging apparatus may perform best under a predefined orientation and deliver lower power levels if the orientation between the wireless charging apparatus and the receiver is different.
- charging times may increase.
- Some solutions may design the wireless charging apparatus in a way that requires a user to place the device in a special cradle or holder that positions the device to be charged in an advantageous orientation, resulting in a loss of convenience to the user.
- FIGS. 23A-23C illustrate an exemplary embodiment of an item bearing transmit antennas oriented in multiple directions. This multi-dimension orientation may increase the power that can be delivered to the receiver positioned in various orientations in respect to the multiple dimensions of the transmit antennas.
- FIGS. 23A-23C a three-dimensional wireless charging apparatus is shown in which the transmit antenna(s) are embedded in approximately orthogonal surfaces along the X, Y, and Z axes.
- the surfaces can be for example, three sides of a rectangular enclosure. Flexibility is provided so that any one of the three Tx antennas, any pair of them, or all three at once can be used to wirelessly provide RF power to the Rx antenna in a device placed within the enclosure.
- a means such as that discussed above with respect to FIGS. 21 and 22 may be used for selecting and multiplexing between the differently oriented antennas.
- an exemplary tool 930 is disposed in a box 910 .
- a first-orientation transmit antenna 912 is disposed on a bottom of the box 910 .
- a second-orientation transmit antenna 914 is disposed on a first side of the box 910 and a third-orientation transmit antenna 916 is disposed on a second side of the box 910 and substantially orthogonal to the second-orientation transmit antenna 914 .
- FIG. 23A illustrates the box 910 with the lid open to show the tool 930 disposed therein.
- FIG. 23B illustrates the box 910 with the lid closed.
- FIG. 23C illustrates an alternate configuration of a continuous loop transmit antenna 920 that includes multiple facets in substantially orthogonal directions. If the exemplary embodiment of FIG. 23C , the continuous loop transmit antenna 920 includes a first facet 922 along the bottom of the box 910 , a second facet 924 along a side of the box 910 , and a third facet 926 along the back of the box 910 .
- a transmitter may be set on the opposite panels so that devices placed in the middle between them can get power from both directions.
- FIGS. 24A and 24B illustrate an exemplary embodiment of a cabinet 950 bearing transmit antennas oriented in multiple directions with transmit antennas in opposite panels.
- FIG. 24A shows the cabinet 950 with an open door and
- FIG. 24B shows the cabinet 950 with the door closed.
- Transmit antennas 972 and 974 are on opposing sides (i.e., the left and the right respectively) of the cabinet 950 .
- Transmit antennas 962 and 964 are on opposing sides (i.e., the door and the back respectively) of the cabinet 950 .
- Transmit antennas 982 and 984 are on opposing sides (i.e., the top and the bottom respectively) of the cabinet 950 .
- a self-calibrating method that defines the optimal selection of Tx antennas leading to the highest power received by the device may be provided. If multiple devices are to be charged in the same enclosure, a means to assign a different selection of Tx antennas to each device is possible by assigning different time slots to each device.
- FIGS. 23A-23C illustrate a generic box 910 and FIGS. 24A and 24B illustrate a generic cabinet 950 .
- this box 910 or cabinet 950 could be any enclosure in a vehicle, such as, for example, a glove box, a console, a baggage trunk, a container in a vehicle for professional equipment (e.g. field technician equipment), or an enclosure designed specifically for wireless charging
- the frequency of operations is chosen to be low enough such the reasonably-sized Tx antennas are within the near-field regions of each other. This allows for much higher coupling levels ( ⁇ 1.5 to ⁇ 3 dB) than would be possible if the antennas were spaced farther apart.
- the orthogonality of the surfaces the embedded Tx antennas results in the electromagnetic fields radiated by them to be approximately orthogonally polarized which in turn improves the isolation between them so that the power lost due to unwanted coupling is reduced. Allowing the power transmitted from each Tx antenna to be intelligently selectable allows for the reduction efficiency losses due to polarization mismatch between the ensemble of Tx and the arbitrarily placed Rx antenna.
- each Rx device and Tx antenna may utilize techniques for signaling between them described in above with respect to FIGS. 13A-15D .
- more sophisticated signaling means may be employed, such as the means described in U.S. patent application Ser. No. 12/249,816, entitled “SIGNALING CHARGING IN WIRELESS POWER ENVIRONMENT” filed on Oct. 10, 2008, the contents of which is hereby incorporated herein in its entirety by reference.
- the signaling schemes can be used during a “calibration period,” in which power is transmitted for all each possible combination of Tx antennas in sequence and the Rx signals back which results the highest power received.
- the Tx system can then begin the charging period using this optimum combination of Tx antennas.
- the signaling scheme allows the Tx system to assign a device a time slot of duration of 1/N times T where N is the number of units being charged and T is the charging period.
- the Rx device can determine the optimum combination of Tx antennas for best power transfer, independent of the combination desired for the other Rx devices. This is not to say that time slotting is required for optimum power transfer to multiple devices.
- the relative orientations of two Rx devices are such that the polarizations of their antennas are orthogonal to each other (e.g., X-Y plane for device A, Y-Z plane for device B).
- the optimum Tx antenna configuration would be to use the Tx antenna oriented in the X-Y plane for device A and the Tx antenna in the Y-Z plane for device B. Due to the inherent isolation between the two Tx antennas, it may be possible to charge them simultaneously. The intelligent nature of the Tx antenna selection by each Rx device allows for such a circumstance.
- Exemplary embodiments of the invention include converting a variety of the equipment around vehicles to hosts with transmitters, repeaters, or a combination thereof that can transfer electric power wirelessly to guest devices with receivers either to charge their rechargeable batteries or to directly feed them.
- This equipment may be generally referred to herein as vehicle elements and existing vehicle items.
- vehicle elements can provide several hot spots in the environment where the hosts are located for wireless transfer of power to guest devices without having to establish independent infrastructure for wireless transmission of electric power.
- These exemplary embodiments may not require a large transmit antenna, which is often more difficult to blend into the décor of the environment and may not be as esthetically acceptable.
- larger antennas may generate larger electromagnetic (EM) fields and it may be harder to comply with safety issues.
- EM electromagnetic
- Exemplary embodiments disclosed may use transmit antennas in vehicle elements as well as extra antennas such as repeaters in the same or other vehicle elements. These repeaters could be fed with electric power or they could be passively terminated. The combination of the repeaters and the coupled antennas in the power transfer system can be optimized such that coupling of power to very small Rx antennas is enhanced. The termination load and tuning component in the repeaters could also be used to optimize the power transfers in a system.
- FIGS. 25-31 illustrate exemplary transportation modes, such as vehicles, trains, etc in which exemplary embodiments of the invention can be practiced.
- trains, planes and automobiles are used herein but it is understood that the exemplary embodiments of the invention are not limited to such.
- wireless charging may be useful for charging nearby items within the coupling-mode region such as, for example, music players, personal digital assistants, cell phones, radar detectors, navigational units such as GPS, etc.
- any of these exemplary embodiments and other embodiments within the scope of the present invention that have an enclosed region may use the enclosed detector 290 discussed above with reference to FIG. 20 for determining whether the vehicle element is in an enclosed state or an open state. When in an enclosed state, enhanced power levels may be possible.
- the enclosed detector 290 may be any sensor capable of detecting an enclosed state, such as, for example, a switch on a door or drawer.
- the wireless charging can be implemented, for example, using inductive coupling, near-field magnetic resonance power energy transfer, etc.
- the transmitter can be integrated (built in), laid over or attached to one or more internal surfaces (shelf, side panel, back panel, upper panel, etc).
- the receiver is connected to the electronic device as an accessory or is integrated into it.
- the inductive coupling implementation there may be a designated spot, active area, slot, shelf, groove or holder where a primary coil is integrated or set using an overlaying pad attached to the internal panel of the storage area.
- the charged device is placed in this designated location to align the receiving coil with the transmitting coil in order to ensure adequate alignment (and therefore coupling) between the transmitting and receiving coil.
- the designated area can be in the form of a special slot within a console or glove box of an automobile.
- the transmitting loop can be added to one or multiple internal surfaces of the storage area.
- the charged device can be placed in parallel to that surface and may be charged within a short distance from it (depending on the power level that is transmitted).
- the charged device with the receiver can be placed anywhere within the transmitting loop boundaries.
- the transmitting loop layout in the storage area may be such that it would prevent users from placing the charged device on its boundaries.
- Adding additional antennas to multiple surfaces provides further flexibility in the orientation of the charged device as explained above with reference to FIGS. 23A-24B .
- These multi-orientation transmit antennas and repeater antennas may be especially helpful if the receiver device is placed inside a storage area that contains other items on top of each other (e.g. a storage bin) or inside a bag that is then placed in a coupling-mode region.
- FIG. 25 illustrates an exemplary embodiment of an antenna 1015 disposed in or on a section of an automobile dashboard 1010 .
- the antenna 1015 may be a transmit antenna or a repeater antenna.
- the antenna 1015 may be originally manufactured as part of the dashboard 1010 (i.e., a vehicle element). Integrating a transmit antenna into plastic or other non-conductive materials of the dashboard may improve coupling.
- the antenna 1015 may be disposed on the dashboard 1010 afterwards (i.e., an existing vehicle item).
- the antenna 1015 may be under, over, or embedded in a dashboard charging pad (not shown) that rests on the dashboard 1010 .
- automotive consumer electronics can be wirelessly powered while they are on or near the automotive dashboard.
- Wirelessly charging automotive electronics using a charging pad placed on the dashboard 1010 reduces in-car cabling, and allows multiple automotive-electronic devices to be powered simultaneously.
- Exemplary embodiment include a wirelessly charging dashboard pad with an antenna 1015 that is capable of one or more of the following, amongst others: a) may be plugged into the automotive electrical systems through a cigarette lighter, USB port, or other auxiliary plug, (b) may rest on the dashboard underneath the automotive electronics to be charged, and (c) may be flexible to fit the contour and color of the car's dashboard.
- antenna 1025 may be integrated into a base or a lid of the storage bin 1022 to create a coupling-mode region therein. While not illustrated in FIG. 26 , those of ordinary skill in the art will recognize that within the scope of the present invention, the storage bin may be a good candidate for a three-dimensional wireless charging apparatus by augmenting the antenna 1035 in the base or the lid with one or more additional antennas orthogonal to the first antenna 1025 in the storage bin. Furthermore, as explained above with reference to FIG. 20 , presence detection and enclosed state detection may be used to adjust power levels of the transmit antennas ( 1025 , 1035 , and 1037 ).
- FIG. 27 illustrates an exemplary embodiment of an antenna 1045 disposed in or on a floor mat 1040 for an automobile.
- the wireless charging transmitter 1045 could be embedded into the floor mat 1040 .
- the wireless charging transmitter 1045 could be embedded into the floor mat 1040 .
- FIGS. 28A and 28B illustrate an exemplary embodiment of an antenna 1065 disposed in or on an automobile storage bin 1060 .
- the storage bin may be a compartment such as, for example, a glove box or a coin box.
- FIGS. 29A and 29B illustrate an exemplary embodiment of an automobile storage bin 1060 including transmit antennas 1065 oriented in multiple directions.
- the antennas 1065 may be transmit antennas, repeater antennas, or a combination thereof.
- the antennas 1065 may be originally manufactured as part of the storage bin 1060 (i.e., a vehicle element). Integrating a transmit antenna into plastic or other non-conductive materials of the storage bin 1060 may improve coupling.
- the antenna 1065 may be disposed in the storage bin 1060 afterwards (i.e., an existing vehicle item).
- the transmit antennas 1065 may be attached to the door, base, sides, back, or top of the storage bin 1060 .
- An auto glove box 1060 is often used to store personal items while driving.
- a portable electronic device such as a cell phone, portable media player, camera, or any other electronic component that can be charged is placed in the auto glove box 1060 it generally cannot be connected to the car charger outside the glove box 1060 .
- the auto glove box may also contain other personal items. Therefore, solutions for charging inside the glove box should take into account the position of the charged device inside the glove box 1060 in regards to the orientation between the receive antenna and the transmit antenna 1065 .
- FIG. 28A a single antenna 1065 is shown in a base of the storage bin 1060 .
- FIG. 28B a receiver device 1069 including a receive antenna is shown along with the transmit antenna 1065 in the storage bin 1060 .
- presence detection and enclosed state detection may be used to adjust power levels of the transmit antennas 1065 in the exemplary embodiments of FIGS. 28A-29B .
- FIG. 30 illustrates an exemplary embodiment of a transmit antenna 1075 disposed in or on a storage bag 1078 draped over a back of a seat 1072 of an automobile to create a coupling-mode region 1076 in and around the storage bag 1078 .
- the antenna 1075 may be integrated into, or attached to, a pocket in the back of the seat in front of a user, such as in the back of a car's front seat. Passengers seated on planes, trains, automobiles, buses, taxis, and the like could have their electronic devices on their person be charged while they are seated, or place their electronic devices in the pocket in the back of the seat in front of them and have the charger within that pocket charge the traveler's consumer electronic devices.
- the transmit antenna 1075 may be integrated into each seat (i.e., a vehicle element) on a mass transport vehicle and would be oriented to charge electronic devices that were in the possession of the person sitting behind the charger.
- the transmit antenna 1075 may be integrated into the pocket in the back of the seat in front of the traveler.
- the wireless charging technique of magnetic resonance may be well suited to such a wireless charger as it would not need exact placement of the consumer electronic device receiving the charge. Charging devices in this manner may permit devices to be charged without any interaction by the owner of the device and may reduce the frequency with which devices needed to be consciously placed in charging stations of any sort.
- a transmit antenna 1075 embedded within the seat may allow devices to be charged while the owner of the device was traveling in the vehicle.
- a transmit antenna 1075 may be inserted inside the seat in front of the owner of the electronic devices that would be receiving the charge.
- the charging unit may be vertically oriented and capable of charging devices that were in the possession of the person seated behind the charger.
- a transmit antenna 1075 may be inserted into the pocket or storage bag 1078 in the back of the seat in front of the traveler and would only charge devices placed within the pocket. This lower range requirement may allow for a lower, and hence safer, transmit power level.
- FIG. 31 illustrates an exemplary embodiment of a transmit antenna 1085 disposed in or on a stowable surface 1080 in a vehicle, such as for example a tray that folds down, folds out of an arm rest, or is otherwise positioned for the convenience of a user seated in a seat of a vehicle such as those on airplane trains, and buses.
- a charging pad may be attached to the tray table 1080 or integrated into the tray table 1080 .
- a transmit antenna 1085 By embedding a transmit antenna 1085 into the tray table 1080 to create a coupling-mode region 1086 , charging service can be provided to devices on or near the tray table 1080 .
- the duration that those electronic devices can operate without re-charging may be extended without the need for awkward charging cables needing to be connected to the electronic devices on the tray table 1080 .
- the wireless charging pad would be attached to or integrated into the tray 1080 that is mounted on the seat in-front of each passenger.
- the wireless charging pad or transmit antenna 1085 may be embedded in the plastic of the tray 1080 itself, and may use a magnetic resonance wireless charging technology such that exact placement of the consumer electronic device on the tray was unnecessary.
- the wireless charging pad may get power from the aircraft electrical system.
- a wireless power transmitter in a tray 1080 of a mass transit vehicle, such as an airplane may extend the powered duration for consumer electronics used during flight, reduce the clutter caused by wired charging cables during flight, and charge devices in a user friendly way so that the device is fully charged when the user departs the aircraft. This charging may match user behavior and may occur even if the device is not used during flight, but was simply placed on the aircraft tray.
- FIG. 32 is a simplified flow chart 2100 illustrating acts that may be performed in one or more exemplary embodiments of the present invention. Various exemplary embodiments may include some or all of the acts illustrated in FIG. 32 , as well as other acts not illustrated.
- a wireless charging apparatus including one or more transmit antennas, one or more repeater antennas, or a combination thereof may be disposed on or in a vehicle element or an existing vehicle item.
- an electromagnetic field at a resonant frequency of the transmit antenna may be generated to create a coupling-mode region within a near-field of the transmit antenna.
- a receive device with a receive antenna may be disposed in the coupling-mode region.
- the process may check to see if a receiver is present in the coupling-mode region. If so, in operation 2110 the wireless charging apparatus may apply power, or increase power, to the transmit antenna. If not, in operation 2112 the wireless charging apparatus may remove power from, or decrease power to, the transmit antenna.
- the process may check to see if the vehicle element is in an enclosed state. If so, in operation 2116 the wireless charging apparatus may increase the power to the transmit antenna to a level that is compatible with an enclosed state of the vehicle element.
- the process may check to see if a human is present in or near the coupling-mode region. If so, in operation 2120 the wireless charging apparatus may adjust the power output of the transmit antenna to a regulatory level or lower. If not, in operation 2124 the wireless charging apparatus may adjust the power output of the transmit antenna above the regulatory level.
- DSP Digital Signal Processor
- ASIC Application Specific Integrated Circuit
- FPGA Field Programmable Gate Array
- a general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
- a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
- a software module may reside in Random Access Memory (RAM), flash memory, Read Only Memory (ROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
- An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
- the storage medium may be integral to the processor.
- the processor and the storage medium may reside in an ASIC.
- the ASIC may reside in a user terminal.
- the processor and the storage medium may reside as discrete components in a user terminal.
- the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
- Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
- a storage media may be any available media that can be accessed by a computer.
- such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
- any connection is properly termed a computer-readable medium.
- the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave
- the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium.
- Disk and disc includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
Abstract
Description
- This application claims priority under 35 U.S.C. §119(e) to:
-
- U.S. Provisional Patent Application 61/151,830 entitled “WIRELESS POWER IN VEHICLES” filed on Feb. 11, 2009, and assigned to the assignee hereof and hereby expressly incorporated by reference herein;
- U.S. Provisional Patent Application 61/152,092 entitled “WIRELESS POWER IN TRANSPORTATION” filed on Feb. 12, 2009, and assigned to the assignee hereof and hereby expressly incorporated by reference herein; and
- U.S. Provisional Patent Application 61/151,290, entitled “MULTI DIMENSIONAL WIRELESS CHARGER” filed on Feb. 10, 2009, and assigned to the assignee hereof and hereby expressly incorporated by reference herein.
- Typically, each battery powered device such as a wireless electronic device requires its own charger and power source, which is usually an alternating current (AC) power outlet. Such a wired configuration becomes unwieldy when many devices need charging.
- Approaches are being developed that use over-the-air or wireless power transmission between a transmitter and a receiver coupled to the electronic device to be charged. Such approaches generally fall into two categories. One is based on the coupling of plane wave radiation (also called far-field radiation) between a transmit antenna and a receive antenna on the device to be charged. The receive antenna collects the radiated power and rectifies it for charging the battery. Antennas are generally of resonant length in order to improve the coupling efficiency. This approach suffers from the fact that the power coupling falls off quickly with distance between the antennas, so charging over reasonable distances (e.g., less than 1 to 2 meters) becomes difficult. Additionally, since the transmitting system radiates plane waves, unintentional radiation can interfere with other systems if not properly controlled through filtering.
- Other approaches to wireless energy transmission techniques are based on inductive coupling between a transmit antenna embedded, for example, in a “charging” mat or surface and a receive antenna (plus a rectifying circuit) embedded in the host electronic device to be charged. This approach has the disadvantage that the spacing between transmit and receive antennas must be very close (e.g., within thousandths of meters). Though this approach does have the capability to simultaneously charge multiple devices in the same area, this area is typically very small and requires the user to accurately locate the devices to a specific area. Therefore, there is a need to provide a wireless charging arrangement that accommodates flexible placement and orientation of transmit and receive antennas.
- With wireless power transmission there is a need for systems and methods for disposing the transmit antennas in vehicles for convenient and unobtrusive wireless power transmission. There is also a need for adjusting the operating characteristics of the antennas to adapt to different circumstances and optimize power transfer characteristics.
-
FIG. 1 shows a simplified block diagram of a wireless power transfer system. -
FIG. 2 shows a simplified schematic diagram of a wireless power transfer system. -
FIG. 3 shows a schematic diagram of a loop antenna for use in exemplary embodiments of the present invention. -
FIG. 4 shows simulation results indicating coupling strength between transmit and receive antennas. -
FIGS. 5A and 5B show layouts of loop antennas for transmit and receive antennas according to exemplary embodiments of the present invention. -
FIG. 6 shows simulation results indicating coupling strength between transmit and receive antennas relative to various circumference sizes for the square and circular transmit antennas illustrated inFIGS. 5A and 5B . -
FIG. 7 shows simulation results indicating coupling strength between transmit and receive antennas relative to various surface areas for the square and circular transmit antennas illustrated inFIGS. 5A and 5B . -
FIG. 8 shows various placement points for a receive antenna relative to a transmit antenna to illustrate coupling strengths in coplanar and coaxial placements. -
FIG. 9 shows simulation results indicating coupling strength for coaxial placement at various distances between the transmit and receive antennas. -
FIG. 10 is a simplified block diagram of a transmitter, in accordance with an exemplary embodiment of the present invention. -
FIG. 11 is a simplified block diagram of a receiver, in accordance with an exemplary embodiment of the present invention. -
FIG. 12 shows a simplified schematic of a portion of transmit circuitry for carrying out messaging between a transmitter and a receiver. -
FIGS. 13A-13C shows a simplified schematic of a portion of receive circuitry in various states to illustrate messaging between a receiver and a transmitter. -
FIGS. 14A-14C shows a simplified schematic of a portion of alternative receive circuitry in various states to illustrate messaging between a receiver and a transmitter. -
FIGS. 15A-15D are simplified block diagrams illustrating a beacon power mode for transmitting power between a transmitter and a receiver. -
FIG. 16A illustrates a large transmit antenna with a smaller repeater antenna disposed coplanar with, and coaxial with, the transmit antenna. -
FIG. 16B illustrates a transmit antenna with a larger repeater antenna with a coaxial placement relative to the transmit antenna. -
FIG. 17A illustrates a large transmit antenna with a three different smaller repeater antennas disposed coplanar with, and within a perimeter of, the transmit antenna. -
FIG. 17B illustrates a large transmit antenna with smaller repeater antennas with offset coaxial placements and offset coplanar placements relative to the transmit antenna. -
FIG. 18 shows simulation results indicating coupling strength between a transmit antenna, a repeater antenna and a receive antenna. -
FIG. 19A shows simulation results indicating coupling strength between a transmit antenna and receive antenna with no repeater antennas. -
FIG. 19B shows simulation results indicating coupling strength between a transmit antenna and receive antenna with a repeater antenna. -
FIG. 20 is a simplified block diagram of a transmitter according to one or more exemplary embodiments of the present invention. -
FIG. 21 is a simplified block diagram of a multiple transmit antenna wireless charging apparatus, in accordance with an exemplary embodiment of the present invention. -
FIG. 22 is a simplified block diagram of a multiple transmit antenna wireless charging apparatus, in accordance with another exemplary embodiment of the present invention. -
FIGS. 23A-23C illustrate an exemplary embodiment of an item bearing transmit antennas oriented in multiple directions. -
FIGS. 24A and 24B illustrate an exemplary embodiment of a cabinet bearing transmit antennas oriented in multiple directions. -
FIG. 25 illustrates an exemplary embodiment of an antenna disposed in or on a section of an automobile dashboard. -
FIG. 26 illustrates an exemplary embodiment of an antenna in or on an automobile console. -
FIG. 27 illustrates an exemplary embodiment of an antenna disposed in or on a floor mat for an automobile. -
FIGS. 28A and 28B illustrate an exemplary embodiment of an antenna disposed in or on an automobile storage bin. -
FIGS. 29A and 29B illustrate an exemplary embodiment of an automobile storage bin including transmit antennas oriented in multiple directions. -
FIG. 30 illustrates an exemplary embodiment of an antenna disposed in or on a storage bag draped over a back of a seat of an automobile. -
FIG. 31 illustrates an exemplary embodiment of an antenna disposed in or on stowable surface in a vehicle. -
FIG. 32 is a simplified flow chart illustrating acts that may be performed in one or more exemplary embodiments of the present invention. - The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.
- The detailed description set forth below in connection with the appended drawings is intended as a description of exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention can be practiced. The term “exemplary” used throughout this description means “serving as an example, instance, or illustration,” and should not necessarily be construed as preferred or advantageous over other exemplary embodiments. The detailed description includes specific details for the purpose of providing a thorough understanding of the exemplary embodiments of the invention. It will be apparent to those skilled in the art that the exemplary embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the novelty of the exemplary embodiments presented herein.
- The words “wireless power” is used herein to mean any form of energy associated with electric fields, magnetic fields, electromagnetic fields, or otherwise that is transmitted between from a transmitter to a receiver without the use of physical electromagnetic conductors.
-
FIG. 1 illustrates wireless transmission or chargingsystem 100, in accordance with various exemplary embodiments of the present invention.Input power 102 is provided to atransmitter 104 for generating aradiated field 106 for providing energy transfer. Areceiver 108 couples to the radiatedfield 106 and generates anoutput power 110 for storing or consumption by a device (not shown) coupled to theoutput power 110. Both thetransmitter 104 and thereceiver 108 are separated by adistance 112. In one exemplary embodiment,transmitter 104 andreceiver 108 are configured according to a mutual resonant relationship and when the resonant frequency ofreceiver 108 and the resonant frequency oftransmitter 104 are exactly identical, transmission losses between thetransmitter 104 and thereceiver 108 are minimal when thereceiver 108 is located in the “near-field” of the radiatedfield 106. -
Transmitter 104 further includes a transmitantenna 114 for providing a means for energy transmission andreceiver 108 further includes a receiveantenna 118 for providing a means for energy reception. The transmit and receive antennas are sized according to applications and devices to be associated therewith. As stated, an efficient energy transfer occurs by coupling a large portion of the energy in the near-field of the transmitting antenna to a receiving antenna rather than propagating most of the energy in an electromagnetic wave to the far field. When in this near-field a coupling mode may be developed between the transmitantenna 114 and the receiveantenna 118. The area around theantennas -
FIG. 2 shows a simplified schematic diagram of a wireless power transfer system. Thetransmitter 104 includes anoscillator 122, apower amplifier 124 and a filter and matchingcircuit 126. The oscillator is configured to generate at a desired frequency, which may be adjusted in response toadjustment signal 123. The oscillator signal may be amplified by thepower amplifier 124 with an amplification amount responsive to controlsignal 125. The filter and matchingcircuit 126 may be included to filter out harmonics or other unwanted frequencies and match the impedance of thetransmitter 104 to the transmitantenna 114. - The receiver may include a
matching circuit 132 and a rectifier and switching circuit to generate a DC power output to charge abattery 136 as shown inFIG. 2 or power a device coupled to the receiver (not shown). Thematching circuit 132 may be included to match the impedance of thereceiver 108 to the receiveantenna 118. - As illustrated in
FIG. 3 , antennas used in exemplary embodiments may be configured as a “loop”antenna 150, which may also be referred to herein as a “magnetic” antenna. Loop antennas may be configured to include an air core or a physical core such as a ferrite core. Air core loop antennas may be more tolerable to extraneous physical devices placed in the vicinity of the core. Furthermore, an air core loop antenna allows the placement of other components within the core area. In addition, an air core loop may more readily enable placement of the receive antenna 118 (FIG. 2 ) within a plane of the transmit antenna 114 (FIG. 2 ) where the coupled-mode region of the transmit antenna 114 (FIG. 2 ) may be more powerful. - As stated, efficient transfer of energy between the
transmitter 104 andreceiver 108 occurs during matched or nearly matched resonance between thetransmitter 104 and thereceiver 108. However, even when resonance between thetransmitter 104 andreceiver 108 are not matched, energy may be transferred at a lower efficiency. Transfer of energy occurs by coupling energy from the near-field of the transmitting antenna to the receiving antenna residing in the neighborhood where this near-field is established rather than propagating the energy from the transmitting antenna into free space. - The resonant frequency of the loop or magnetic antennas is based on the inductance and capacitance. Inductance in a loop antenna is generally simply the inductance created by the loop, whereas, capacitance is generally added to the loop antenna's inductance to create a resonant structure at a desired resonant frequency. As a non-limiting example,
capacitor 152 andcapacitor 154 may be added to the antenna to create a resonant circuit that generatesresonant signal 156. Accordingly, for larger diameter loop antennas, the size of capacitance needed to induce resonance decreases as the diameter or inductance of the loop increases. Furthermore, as the diameter of the loop or magnetic antenna increases, the efficient energy transfer area of the near-field increases. Of course, other resonant circuits are possible. As another non-limiting example, a capacitor may be placed in parallel between the two terminals of the loop antenna. In addition, those of ordinary skill in the art will recognize that for transmit antennas theresonant signal 156 may be an input to theloop antenna 150. - Exemplary embodiments of the invention include coupling power between two antennas that are in the near-fields of each other. As stated, the near-field is an area around the antenna in which electromagnetic fields exist but may not propagate or radiate away from the antenna. They are typically confined to a volume that is near the physical volume of the antenna. In the exemplary embodiments of the invention, magnetic type antennas such as single and multi-turn loop antennas are used for both transmit (Tx) and receive (Rx) antenna systems since magnetic near-field amplitudes tend to be higher for magnetic type antennas in comparison to the electric near-fields of an electric-type antenna (e.g., a small dipole). This allows for potentially higher coupling between the pair. Furthermore, “electric” antennas (e.g., dipoles and monopoles) or a combination of magnetic and electric antennas is also contemplated.
- The Tx antenna can be operated at a frequency that is low enough and with an antenna size that is large enough to achieve good coupling (e.g., >−4 dB) to a small Rx antenna at significantly larger distances than allowed by far field and inductive approaches mentioned earlier. If the Tx antenna is sized correctly, high coupling levels (e.g., −2 to −4 dB) can be achieved when the Rx antenna on a host device is placed within a coupling-mode region (i.e., in the near-field) of the driven Tx loop antenna.
-
FIG. 4 shows simulation results indicating coupling strength between transmit and receive antennas.Curves FIG. 4 , the transmit antenna and the receive antenna are tuned to have a resonant frequency of about 13.56 MHz. -
Curve 170 illustrates the amount of power transmitted from the transmit antenna at various frequencies. Thus, atpoints 1 a and 3 a, corresponding to about 13.528 MHz and 13.593 MHz, much of the power is reflected and not transmitted out of the transmit antenna. However, atpoint 2 a, corresponding to about 13.56 MHz, it can be seen that a large amount of the power is accepted and transmitted out of the antenna. - Similarly,
curve 172 illustrates the amount of power received by the receive antenna at various frequencies. Thus, atpoints point 2 b corresponding to about 13.56 MHz, it can be seen that a large amount of the power is accepted by the receive antenna and conveyed into the receiver. -
Curve 174 indicates the amount of power received at the receiver after being sent from the transmitter through the transmit antenna, received through the receive antenna and conveyed to the receiver. Thus, atpoints point 2 c corresponding to about 13.56 MHz, it can be seen that a large amount of the power sent from the transmitter is available at the receiver, indicating a high degree of coupling between the transmit antenna and the receive antenna. -
FIGS. 5A and 5B show layouts of loop antennas for transmit and receive antennas according to exemplary embodiments of the present invention. Loop antennas may be configured in a number of different ways, with single loops or multiple loops at wide variety of sizes. In addition, the loops may be a number of different shapes, such as, for example only, circular, elliptical, square, and rectangular.FIG. 5A illustrates a large square loop transmitantenna 114S and a small square loop receiveantenna 118 placed in the same plane as the transmitantenna 114S and near the center of the transmitantenna 114S.FIG. 5B illustrates a large circular loop transmitantenna 114C and a small square loop receiveantenna 118′ placed in the same plane as the transmitantenna 114C and near the center of the transmitantenna 114C. The square loop transmitantenna 114S has side lengths of “a” while the circular loop transmitantenna 114C has a diameter of “Φ.” For a square loop, it can be shown that there is an equivalent circular loop whose diameter may be defined as: Φeq=4a/π. -
FIG. 6 shows simulation results indicating coupling strength between transmit and receive antennas relative to various circumferences for the square and circular transmit antennas illustrated inFIGS. 4A and 4B . Thus,curve 180 shows coupling strength between the circular loop transmitantennas 114C and the receiveantenna 118 at various circumference sizes for the circular loop transmitantenna 114C. Similarly,curve 182 shows coupling strength between the square loop transmitantennas 114S and the receiveantenna 118′ at various equivalent circumference sizes for the transmit loop transmitantenna 114S. -
FIG. 7 shows simulation results indicating coupling strength between transmit and receive antennas relative to various surface areas for the square and circular transmit antennas illustrated inFIGS. 5A and 5B . Thus,curve 190 shows coupling strength between the circular loop transmitantennas 114C and the receiveantenna 118 at various surface areas for the circular loop transmitantenna 114C. Similarly,curve 192 shows coupling strength between the square loop transmitantennas 114S and the receiveantenna 118′ at various surface areas for the transmit loop transmitantenna 114S. -
FIG. 8 shows various placement points for a receive antenna relative to a transmit antenna to illustrate coupling strengths in coplanar and coaxial placements. “Coplanar,” as used herein, means that the transmit antenna and receive antenna have planes that are substantially aligned (i.e., have surface normals pointing in substantially the same direction) and with no distance (or a small distance) between the planes of the transmit antenna and the receive antenna. “Coaxial,” as used herein, means that the transmit antenna and receive antenna have planes that are substantially aligned (i.e., have surface normals pointing in substantially the same direction) and the distance between the two planes is not trivial and furthermore, the surface normal of the transmit antenna and the receive antenna lie substantially along the same vector, or the two normals are in echelon. - As examples, points p1, p2, p3, and p7 are all coplanar placement points for a receive antenna relative to a transmit antenna. As another example, point p5 and p6 are coaxial placement points for a receive antenna relative to a transmit antenna. The table below shows coupling strength (S21) and coupling efficiency (expressed as a percentage of power transmitted from the transmit antenna that reached the receive antenna) at the various placement points (p1-p7) illustrated in
FIG. 8 . -
TABLE 1 Efficiency (TX Distance from S21 efficiency DC power in to Position plane (cm) (%) RX DC power out) p1 0 46.8 28 p2 0 55.0 36 p3 0 57.5 35 p4 2.5 49.0 30 p5 17.5 24.5 15 p6 17.5 0.3 0.2 p7 0 5.9 3.4 - As can be seen, the coplanar placement points p1, p2, and p3, all show relatively high coupling efficiencies. Placement point p7 is also a coplanar placement point, but is outside of the transmit loop antenna. While placement point p7 does not have a high coupling efficiency, it is clear that there is some coupling and the coupling-mode region extends beyond the perimeter of the transmit loop antenna.
- Placement point p5 is coaxial with the transmit antenna and shows substantial coupling efficiency. The coupling efficiency for placement point p5 is not as high as the coupling efficiencies for the coplanar placement points. However, the coupling efficiency for placement point p5 is high enough that substantial power can be conveyed between the transmit antenna and a receive antenna in a coaxial placement.
- Placement point p4 is within the circumference of the transmit antenna but at a slight distance above the plane of the transmit antenna in a position that may be referred to as an offset coaxial placement (i.e., with surface normals in substantially the same direction but at different locations) or offset coplanar (i.e., with surface normals in substantially the same direction but with planes that are offset relative to each other). From the table it can be seen that with an offset distance of 2.5 cm, placement point p4 still has relatively good coupling efficiency.
- Placement point p6 illustrates a placement point outside the circumference of the transmit antenna and at a substantial distance above the plane of the transmit antenna. As can be seen from the table, placement point p7 shows little coupling efficiency between the transmit and receive antennas.
-
FIG. 9 shows simulation results indicating coupling strength for coaxial placement at various distances between the transmit and receive antennas. The simulations forFIG. 9 are for square transmit and receive antennas in a coaxial placement, both with sides of about 1.2 meters and at a transmit frequency of 10 MHz. It can be seen that the coupling strength remains quite high and uniform at distances of less than about 0.5 meters. -
FIG. 10 is a simplified block diagram of a transmitter, in accordance with an exemplary embodiment of the present invention. Atransmitter 200 includes transmitcircuitry 202 and a transmitantenna 204. Generally, transmitcircuitry 202 provides RF power to the transmitantenna 204 by providing an oscillating signal resulting in generation of near-field energy about the transmitantenna 204. By way of example,transmitter 200 may operate at the 13.56 MHz ISM band. - Exemplary transmit
circuitry 202 includes a fixedimpedance matching circuit 206 for matching the impedance of the transmit circuitry 202 (e.g., 50 ohms) to the transmitantenna 204 and a low pass filter (LPF) 208 configured to reduce harmonic emissions to levels to prevent self-jamming of devices coupled to receivers 108 (FIG. 1 ). Other embodiments may include different filter topologies, including but not limited to, notch filters that attenuate specific frequencies while passing others and may include an adaptive impedance match, that can be varied based on measurable transmit metrics, such as output power to the antenna or DC current draw by the power amplifier. Transmitcircuitry 202 further includes apower amplifier 210 configured to drive an RF signal as determined by anoscillator 212. The transmit circuitry may be comprised of discrete devices or circuits, or alternately, may be comprised of an integrated assembly. An exemplary RF power output from transmitantenna 204 may be on the order of 2.5 Watts. - Transmit
circuitry 202 further includes aprocessor 214 for enabling theoscillator 212 during transmit phases (or duty cycles) for specific receivers, for adjusting the frequency of the oscillator, and for adjusting the output power level for implementing a communication protocol for interacting with neighboring devices through their attached receivers. - The transmit
circuitry 202 may further include aload sensing circuit 216 for detecting the presence or absence of active receivers in the vicinity of the near-field generated by transmitantenna 204. By way of example, aload sensing circuit 216 monitors the current flowing to thepower amplifier 210, which is affected by the presence or absence of active receivers in the vicinity of the near-field generated by transmitantenna 204. Detection of changes to the loading on thepower amplifier 210 are monitored byprocessor 214 for use in determining whether to enable theoscillator 212 for transmitting energy to communicate with an active receiver. - Transmit
antenna 204 may be implemented as an antenna strip with the thickness, width and metal type selected to keep resistive losses low. In a conventional implementation, the transmitantenna 204 can generally be configured for association with a larger structure such as a table, mat, lamp or other less portable configuration. Accordingly, the transmitantenna 204 generally will not need “turns” in order to be of a practical dimension. An exemplary implementation of a transmitantenna 204 may be “electrically small” (i.e., fraction of the wavelength) and tuned to resonate at lower usable frequencies by using capacitors to define the resonant frequency. In an exemplary application where the transmitantenna 204 may be larger in diameter, or length of side if a square loop, (e.g., 0.50 meters) relative to the receive antenna, the transmitantenna 204 will not necessarily need a large number of turns to obtain a reasonable capacitance. -
FIG. 11 is a block diagram of a receiver, in accordance with an exemplary embodiment of the present invention. Areceiver 300 includes receivecircuitry 302 and a receiveantenna 304.Receiver 300 further couples todevice 350 for providing received power thereto. It should be noted thatreceiver 300 is illustrated as being external todevice 350 but may be integrated intodevice 350. Generally, energy is propagated wirelessly to receiveantenna 304 and then coupled through receivecircuitry 302 todevice 350. - Receive
antenna 304 is tuned to resonate at the same frequency, or near the same frequency, as transmit antenna 204 (FIG. 10 ). Receiveantenna 304 may be similarly dimensioned with transmitantenna 204 or may be differently sized based upon the dimensions of an associateddevice 350. By way of example,device 350 may be a portable electronic device having diametric or length dimension smaller that the diameter of length of transmitantenna 204. In such an example, receiveantenna 304 may be implemented as a multi-turn antenna in order to reduce the capacitance value of a tuning capacitor (not shown) and increase the receive antenna's impedance. By way of example, receiveantenna 304 may be placed around the substantial circumference ofdevice 350 in order to maximize the antenna diameter and reduce the number of loop turns (i.e., windings) of the receive antenna and the inter-winding capacitance. - Receive
circuitry 302 provides an impedance match to the receiveantenna 304. Receivecircuitry 302 includespower conversion circuitry 306 for converting a received RF energy source into charging power for use bydevice 350.Power conversion circuitry 306 includes an RF-to-DC converter 308 and may also in include a DC-to-DC converter 310. RF-to-DC converter 308 rectifies the RF energy signal received at receiveantenna 304 into a non-alternating power while DC-to-DC converter 310 converts the rectified RF energy signal into an energy potential (e.g., voltage) that is compatible withdevice 350. Various RF-to-DC converters are contemplated including partial and full rectifiers, regulators, bridges, doublers, as well as linear and switching converters. - Receive
circuitry 302 may further include switchingcircuitry 312 for connecting receiveantenna 304 to thepower conversion circuitry 306 or alternatively for disconnecting thepower conversion circuitry 306. Disconnecting receiveantenna 304 frompower conversion circuitry 306 not only suspends charging ofdevice 350, but also changes the “load” as “seen” by the transmitter 200 (FIG. 2 ) as is explained more fully below. As disclosed above,transmitter 200 includesload sensing circuit 216 which detects fluctuations in the bias current provided totransmitter power amplifier 210. Accordingly,transmitter 200 has a mechanism for determining when receivers are present in the transmitter's near-field. - When
multiple receivers 300 are present in a transmitter's near-field, it may be desirable to time-multiplex the loading and unloading of one or more receivers to enable other receivers to more efficiently couple to the transmitter. A receiver may also be cloaked in order to eliminate coupling to other nearby receivers or to reduce loading on nearby transmitters. This “unloading” of a receiver is also known herein as a “cloaking” Furthermore, this switching between unloading and loading controlled byreceiver 300 and detected bytransmitter 200 provides a communication mechanism fromreceiver 300 totransmitter 200 as is explained more fully below. Additionally, a protocol can be associated with the switching which enables the sending of a message fromreceiver 300 totransmitter 200. By way of example, a switching speed may be on the order of 100 μsec. - In an exemplary embodiment, communication between the transmitter and the receiver refers to a device sensing and charging control mechanism, rather than conventional two-way communication. In other words, the transmitter uses on/off keying of the transmitted signal to adjust whether energy is available in the near-filed. The receivers interpret these changes in energy as a message from the transmitter. From the receiver side, the receiver uses tuning and de-tuning of the receive antenna to adjust how much power is being accepted from the near-field. The transmitter can detect this difference in power used from the near-field and interpret these changes as a message from the receiver.
- Receive
circuitry 302 may further include signaling detector andbeacon circuitry 314 used to identify received energy fluctuations, which may correspond to informational signaling from the transmitter to the receiver. Furthermore, signaling andbeacon circuitry 314 may also be used to detect the transmission of a reduced RF signal energy (i.e., a beacon signal) and to rectify the reduced RF signal energy into a nominal power for awakening either un-powered or power-depleted circuits within receivecircuitry 302 in order to configure receivecircuitry 302 for wireless charging. - Receive
circuitry 302 further includesprocessor 316 for coordinating the processes ofreceiver 300 described herein including the control of switchingcircuitry 312 described herein. Cloaking ofreceiver 300 may also occur upon the occurrence of other events including detection of an external wired charging source (e.g., wall/USB power) providing charging power todevice 350.Processor 316, in addition to controlling the cloaking of the receiver, may also monitorbeacon circuitry 314 to determine a beacon state and extract messages sent from the transmitter.Processor 316 may also adjust DC-to-DC converter 310 for improved performance. -
FIG. 12 shows a simplified schematic of a portion of transmit circuitry for carrying out messaging between a transmitter and a receiver. In some exemplary embodiments of the present invention, a means for communication may be enabled between the transmitter and the receiver. InFIG. 12 apower amplifier 210 drives the transmitantenna 204 to generate the radiated field. The power amplifier is driven by acarrier signal 220 that is oscillating at a desired frequency for the transmitantenna 204. A transmitmodulation signal 224 is used to control the output of thepower amplifier 210. - The transmit circuitry can send signals to receivers by using an ON/OFF keying process on the
power amplifier 210. In other words, when the transmitmodulation signal 224 is asserted, thepower amplifier 210 will drive the frequency of thecarrier signal 220 out on the transmitantenna 204. When the transmitmodulation signal 224 is negated, the power amplifier will not drive out any frequency on the transmitantenna 204. - The transmit circuitry of
FIG. 12 also includes aload sensing circuit 216 that supplies power to thepower amplifier 210 and generates a receivesignal 235 output. In the load sensing circuit 216 a voltage drop across resistor Rs develops between the power insignal 226 and thepower supply 228 to thepower amplifier 210. Any change in the power consumed by thepower amplifier 210 will cause a change in the voltage drop that will be amplified bydifferential amplifier 230. When the transmit antenna is in coupled mode with a receive antenna in a receiver (not shown inFIG. 12 ) the amount of current drawn by thepower amplifier 210 will change. In other words, if no coupled mode resonance exist for the transmitantenna 210, the power required to drive the radiated field will be first amount. If a coupled mode resonance exists, the amount of power consumed by thepower amplifier 210 will go up because much of the power is being coupled into the receive antenna. Thus, the receivesignal 235 can indicate the presence of a receive antenna coupled to the transmitantenna 235 and can also detect signals sent from the receive antenna, as explained below. Additionally, a change in receiver current draw will be observable in the transmitter's power amplifier current draw, and this change can be used to detect signals from the receive antennas, as explained below. -
FIGS. 13A-13C shows a simplified schematic of a portion of receive circuitry in various states to illustrate messaging between a receiver and a transmitter. All ofFIGS. 13A-13C show the same circuit elements with the difference being state of the various switches. A receiveantenna 304 includes a characteristic inductance L1, which drivesnode 350.Node 350 is selectively coupled to ground through switch S1A.Node 350 is also selectively coupled to diode D1 andrectifier 318 through switch SIB. Therectifier 318 supplies aDC power signal 322 to a receive device (not shown) to power the receive device, charge a battery, or a combination thereof. The diode D1 is coupled to a transmitsignal 320 which is filtered to remove harmonics and unwanted frequencies with capacitor C3 and resistor R1. Thus the combination of D1, C3, and R1 can generate a signal on the transmitsignal 320 that mimics the transmit modulation generated by the transmitmodulation signal 224 discussed above with reference to the transmitter inFIG. 12 . - Exemplary embodiments of the invention includes modulation of the receive device's current draw and modulation of the receive antenna's impedance to accomplish reverse link signaling. With reference to both
FIG. 13A andFIG. 12 , as the power draw of the receive device changes, theload sensing circuit 216 detects the resulting power changes on the transmit antenna and from these changes can generate the receivesignal 235. - In the exemplary embodiments of
FIGS. 13A-13C , the current draw through the transmitter can be changed by modifying the state of switches S1A and S2A. InFIG. 13A , switch S1A and switch S2A are both open creating a “DC open state” and essentially removing the load from the transmitantenna 204. This reduces the current seen by the transmitter. - In
FIG. 13B , switch S1A is closed and switch S2A is open creating a “DC short state” for the receiveantenna 304. Thus the state inFIG. 13B can be used to increase the current seen in the transmitter. - In
FIG. 13C , switch S1A is open and switch S2A is closed creating a normal receive mode (also referred to herein as a “DC operating state”) wherein power can be supplied by the DC outsignal 322 and a transmitsignal 320 can be detected. In the state shown inFIG. 13C the receiver receives a normal amount of power, thus consuming more or less power from the transmit antenna than the DC open state or the DC short state. - Reverse link signaling may be accomplished by switching between the DC operating state (
FIG. 13C ) and the DC short state (FIG. 13B ). Reverse link signaling also may be accomplished by switching between the DC operating state (FIG. 13C ) and the DC open state (FIG. 13A ). -
FIGS. 14A-14C shows a simplified schematic of a portion of alternative receive circuitry in various states to illustrate messaging between a receiver and a transmitter. - All of
FIGS. 14A-14C show the same circuit elements with the difference being state of the various switches. A receiveantenna 304 includes a characteristic inductance L1, which drivesnode 350.Node 350 is selectively coupled to ground through capacitor C1 and switch SIB.Node 350 is also AC coupled to diode D1 andrectifier 318 through capacitor C2. The diode D1 is coupled to a transmitsignal 320 which is filtered to remove harmonics and unwanted frequencies with capacitor C3 and resistor R1. Thus the combination of D1, C3, and R1 can generate a signal on the transmitsignal 320 that mimics the transmit modulation generated by the transmitmodulation signal 224 discussed above with reference to the transmitter inFIG. 12 . - The
rectifier 318 is connected to switch S2B, which is connected in series with resistor R2 and ground. Therectifier 318 also is connected to switch S3B. The other side of switch S3B supplies aDC power signal 322 to a receive device (not shown) to power the receive device, charge a battery, or a combination thereof. - In
FIGS. 13A-13C the DC impedance of the receiveantenna 304 is changed by selectively coupling the receive antenna to ground through switch SIB. In contrast, in the exemplary embodiments ofFIGS. 14A-14C , the impedance of the antenna can be modified to generate the reverse link signaling by modifying the state of switches S1B, S2B, and S3B to change the AC impedance of the receiveantenna 304. InFIGS. 14A-14C the resonant frequency of the receiveantenna 304 may be tuned with capacitor C2. Thus, the AC impedance of the receiveantenna 304 may be changed by selectively coupling the receiveantenna 304 through capacitor C1 using switch S1B, essentially changing the resonance circuit to a different frequency that will be outside of a range that will optimally couple with the transmit antenna. If the resonance frequency of the receiveantenna 304 is near the resonant frequency of the transmit antenna, and the receiveantenna 304 is in the near-field of the transmit antenna, a coupling mode may develop wherein the receiver can draw significant power from the radiatedfield 106. - In
FIG. 14A , switch S1B is closed, which de-tunes the antenna and creates an “AC cloaking state,” essentially “cloaking” the receiveantenna 304 from detection by the transmitantenna 204 because the receive antenna does not resonate at the transmit antenna's frequency. Since the receive antenna will not be in a coupled mode, the state of switches S2B and S3B are not particularly important to the present discussion. - In
FIG. 14B , switch S1B is open, switch S2B is closed, and switch S3B is open, creating a “tuned dummy-load state” for the receiveantenna 304. Because switch S1B is open, capacitor C1 does not contribute to the resonance circuit and the receiveantenna 304 in combination with capacitor C2 will be in a resonance frequency that may match with the resonant frequency of the transmit antenna. The combination of switch S3B open and switch S2B closed creates a relatively high current dummy load for the rectifier, which will draw more power through the receiveantenna 304, which can be sensed by the transmit antenna. In addition, the transmitsignal 320 can be detected since the receive antenna is in a state to receive power from the transmit antenna. - In
FIG. 14C , switch S1B is open, switch S2B is open, and switch S3B is closed, creating a “tuned operating state” for the receiveantenna 304. Because switch S1B is open, capacitor C1 does not contribute to the resonance circuit and the receiveantenna 304 in combination with capacitor C2 will be in a resonance frequency that may match with the resonant frequency of the transmit antenna. The combination of switch S2B open and switch S3B closed creates a normal operating state wherein power can be supplied by the DC outsignal 322 and a transmitsignal 320 can be detected. - Reverse link signaling may be accomplished by switching between the tuned operating state (
FIG. 14C ) and the AC cloaking state (FIG. 14A ). Reverse link signaling also may be accomplished by switching between the tuned dummy-load state (FIG. 14B ) and the AC cloaking state (FIG. 14A ). Reverse link signaling also may be accomplished by switching between the tuned operating state (FIG. 14C ) and the tuned dummy-load state (FIG. 14B ) because there will be a difference in the amount of power consumed by the receiver, which can be detected by the load sensing circuit in the transmitter. - Of course, those of ordinary skill in the art will recognize that other combinations of switches S1B, S2B, and S3B may be used to create cloaking, generate reverse link signaling and supplying power to the receive device. In addition, the switches S1A and S1B may be added to the circuits of
FIGS. 14A-14C to create other possible combinations for cloaking, reverse link signaling, and supplying power to the receive device. - Thus, when in a coupled mode signals may be sent from the transmitter to the receiver, as discussed above with reference to
FIG. 12 . In addition, when in a coupled mode signals may be sent from the receiver to the transmitter, as discussed above with reference toFIGS. 13A-13C and 14A-14C. -
FIGS. 15A-15D are simplified block diagrams illustrating a beacon power mode for transmitting power between a transmitter and a one or more receivers.FIG. 15A illustrates atransmitter 520 having a low power “beacon”signal 525 when there are no receive devices in the beacon coupling-mode region 510. Thebeacon signal 525 may be, as a non-limiting example, such as in the range of ˜10 to ˜20 mW RF. This signal may be adequate to provide initial power to a device to be charged when it is placed in the coupling-mode region. -
FIG. 15B illustrates a receivedevice 530 placed within the beacon coupling-mode region 510 of thetransmitter 520 transmitting thebeacon signal 525. If the receivedevice 530 is on and develops a coupling with the transmitter it will generate areverse link coupling 535, which is really just the receiver accepting power from thebeacon signal 525. This additional power, may be sensed by the load sensing circuit 216 (FIG. 12 ) of the transmitter. As a result, the transmitter may go into a high power mode. -
FIG. 15C illustrates thetransmitter 520 generating ahigh power signal 525′ resulting in a high power coupling-mode region 510′. As long as the receivedevice 530 is accepting power and, as a result, generating thereverse link coupling 535, the transmitter will remain in the high power state. While only one receivedevice 530 is illustrated, multiple receivedevices 530 may be present in the coupling-mode region 510. If there are multiple receivedevice 530 they will share the amount of power transmitted by the transmitter based on how well each receivedevice 530 is coupled. For example, the coupling efficiency may be different for each receivedevice 530 depending on where the device is placed within the coupling-mode region 510 as was explained above with reference toFIGS. 8 and 9 . -
FIG. 15D illustrates thetransmitter 520 generating thebeacon signal 525 even when a receivedevice 530 is in the beacon coupling-mode region 510. This state may occur when the receivedevice 530 is shut off, or the device cloaks itself, perhaps because it does not need any more power. - The receiver and transmitter may communicate on a separate communication channel (e.g., Bluetooth, zigbee, etc). With a separate communication channel, the transmitter may determine when to switch between beacon mode and high power mode, or create multiple power levels, based on the number of receive devices in the coupling-
mode region 510 and their respective power requirements. - Exemplary embodiments of the invention include enhancing the coupling between a relatively large transmit antenna and a small receive antenna in the near-field power transfer between two antennas through introduction of additional antennas into the system of coupled antennas that will act as repeaters and will enhance the flow of power from the transmitting antenna toward the receiving antenna.
- In exemplary embodiments, one or more extra antennas are used that couple to the transmit antenna and receive antenna in the system. These extra antennas comprise repeater antennas, such as active or passive antennas. A passive antenna may include simply the antenna loop and a capacitive element for tuning a resonant frequency of the antenna. An active element may include, in addition to the antenna loop and one or more tuning capacitors, an amplifier for increasing the strength of a repeated near-field radiation.
- The combination of the transmit antenna and the repeater antennas in the power transfer system may be optimized such that coupling of power to very small receive antennas is enhanced based on factors such as termination loads, tuning components, resonant frequencies, and placement of the repeater antennas relative to the transmit antenna.
- A single transmit antenna exhibits a finite near-field coupling mode region. Accordingly, a user of a device charging through a receiver in the transmit antenna's near-field coupling mode region may require a considerable user access space that would be prohibitive or at least inconvenient. Furthermore, the coupling mode region may diminish quickly as a receive antenna moves away from the transmit antenna.
- A repeater antenna may refocus and reshape a coupling mode region from a transmit antenna to create a second coupling mode region around the repeater antenna, which may be better suited for coupling energy to a receive antenna. Discussed below in
FIGS. 16A-19B are some non-limiting examples of embodiments including repeater antennas. -
FIG. 16A illustrates a large transmitantenna 610A with asmaller repeater antenna 620A disposed coplanar with, and within a perimeter of, the transmitantenna 610A. The transmitantenna 610A andrepeater antenna 620A are both formed on a table 640, as a non-limiting example. A device including a receiveantenna 630A is placed within the perimeter of therepeater antenna 620A. With very large antennas, there may be areas of the coupling mode region that are relatively week near the center of the transmitantenna 610A. Presence of this weak region may be particularly noticeable when attempting to couple to a very small receiveantenna 630A. Therepeater antenna 620A placed coplanar with the transmitantenna 610A, but with a smaller size, may be able to refocus the coupling mode region generated by the transmitantenna 610A into a smaller and stronger repeated coupling mode region around therepeater antenna 620A. As a result, a relatively strong repeated near-field radiation is available for the receiveantenna 630A. -
FIG. 16B illustrates a transmitantenna 610B with alarger repeater antenna 620B with a coaxial placement relative to the transmitantenna 610B. A device including a receiveantenna 630B is placed within the perimeter of therepeater antenna 620B. The transmitantenna 610B is formed around the lower edge circumference of alamp shade 642, while therepeater antenna 620B is disposed on a table 640. Recall that with coaxial placements, the near-field radiation may diminish relatively quickly relative to distance away from the plane of an antenna. As a result, the small receiveantenna 630B placed in a coaxial placement relative to the transmitantenna 610B may be in a weak coupling mode region. However, thelarge repeater antenna 620B placed coaxially with the transmitantenna 610B may be able to reshape the coupled mode region of the transmitantenna 610B to another coupled mode region in a different place around therepeater antenna 620B. As a result, a relatively strong repeated near-field radiation is available for the receiveantenna 630B placed coplanar with therepeater antenna 620B. -
FIG. 17A illustrates a large transmitantenna 610C with threesmaller repeater antennas 620C disposed coplanar with, and within a perimeter of, the transmitantenna 610C. The transmitantenna 610C andrepeater antennas 620C are formed on a table 640. Various devices including receiveantennas 630C are placed at various locations within the transmitantenna 610C andrepeater antennas 620C. As with the exemplary embodiment illustrated inFIG. 16A , the exemplary embodiment ofFIG. 17A may be able to refocus the coupling mode region generated by the transmitantenna 610C into smaller and stronger repeated coupling mode regions around each of therepeater antennas 620C. As a result, a relatively strong repeated near-field radiation is available for the receiveantennas 630C. Some of the receive antennas are placed outside of anyrepeater antennas 620C. Recall that the coupled mode region may extend somewhat outside the perimeter of an antenna. Therefore, receiveantennas 630C may be able to receive power from the near-field radiation of the transmitantenna 610C as well as anynearby repeater antennas 620C. As a result, receive antennas placed outside of anyrepeater antennas 620C, may be still be able to receive power from the near-field radiation of the transmitantenna 610C as well as anynearby repeater antennas 620C. -
FIG. 17B illustrates a large transmitantenna 610D withsmaller repeater antennas 620D with offset coaxial placements and offset coplanar placements relative to the transmitantenna 610D. A device including a receiveantenna 630D is placed within the perimeter of one of therepeater antennas 620D. As a non-limiting example, the transmitantenna 610D may be disposed on aceiling 646, while therepeater antennas 620D may be disposed on a table 640. As with the exemplary embodiment ofFIG. 16B , therepeater antennas 620D in an offset coaxial placement may be able to reshape and enhance the near-field radiation from thetransmitter antenna 610D to repeated near-field radiation around therepeater antennas 620D. As a result, a relatively strong repeated near-field radiation is available for the receiveantenna 630D placed coplanar with therepeater antennas 620D. - While the various transmit antennas and repeater antennas have been shown in general on surfaces, these antennas may also be disposed under surfaces (e.g., under a table, under a floor, behind a wall, or behind a ceiling), or within surfaces (e.g., a table top, a wall, a floor, or a ceiling).
-
FIG. 18 shows simulation results indicating coupling strength between a transmit antenna, a repeater antenna and a receive antenna. The transmit antenna, the repeater antenna, and the receive antenna are tuned to have a resonant frequency of about 13.56 MHz. -
Curve 662 illustrates a measure for the amount of power transmitted from the transmit antenna out of the total power fed to the transmit antenna at various frequencies. Similarly,curve 664 illustrates a measure for the amount of power received by the receive antenna through the repeater antenna out of the total power available in the vicinity of its terminals at various frequencies. Finally,Curve 668 illustrates the amount of power actually coupled between the transmit antenna, through the repeater antenna and into the receive antenna at various frequencies. - At the peak of
curve 668, corresponding to about 13.56 MHz, it can be seen that a large amount of the power sent from the transmitter is available at the receiver, indicating a high degree of coupling between the combination of the transmit antenna, the repeater antenna and the receive antenna. -
FIG. 19A show simulation results indicating coupling strength between a transmit antenna and receive antenna disposed in a coaxial placement relative to the transmit antenna with no repeater antennas. The transmit antenna and the receive antenna are tuned to have a resonant frequency of about 10 MHz. The transmit antenna in this simulation is about 1.3 meters on a side and the receive antenna is a multi-loop antenna at about 30 mm on a side. The receive antenna is placed at about 2 meters away from the plane of the transmit antenna.Curve 682A illustrates a measure for the amount of power transmitted from the transmit antenna out of the total power fed to its terminals at various frequencies. Similarly,curve 684A illustrates a measure of the amount of power received by the receive antenna out of the total power available in the vicinity of its terminals at various frequencies. Finally, Curve 686A illustrates the amount of power actually coupled between the transmit antenna and the receive antenna at various frequencies. -
FIG. 19B show simulation results indicating coupling strength between the transmit and receive antennas ofFIG. 19A when a repeater antenna is included in the system. The transmit antenna and receive antenna are the same size and placement as inFIG. 19A . The repeater antenna is about 28 cm on a side and placed coplanar with the receive antenna (i.e., about 0.1 meters away from the plane of the transmit antenna). InFIG. 19B ,Curve 682B illustrates a measure of the amount of power transmitted from the transmit antenna out of the total power fed to its terminals at various frequencies.Curve 684B illustrates the amount of power received by the receive antenna through the repeater antenna out of the total power available in the vicinity of its terminals at various frequencies. Finally,Curve 686B illustrates the amount of power actually coupled between the transmit antenna, through the repeater antenna and into the receive antenna at various frequencies. - When comparing the coupled power (686A and 686B) from
FIGS. 19A and 19B it can be seen that without a repeater antenna the coupled power 686A peaks at about −36 dB. Whereas, with a repeater antenna the coupledpower 686B peaks at about −5 dB. Thus, near the resonant frequency, there is a significant increase in the amount of power available to the receive antenna due to the inclusion of a repeater antenna. - Exemplary embodiments of the invention include low cost unobtrusive ways to properly manage how the transmitter radiates to single and multiple devices and device types in order to optimize the efficiency by which the transmitter conveys charging power to the individual devices.
- Exemplary embodiments of the invention include low cost unobtrusive ways to properly manage how the transmitter radiates to single and multiple devices and device types in order to optimize the efficiency by which the transmitter conveys charging power to the individual devices.
-
FIG. 20 is a simplified block diagram of atransmitter 200 for use invehicles 299 and other modes oftransportation 299. As non-limiting examples, a vehicle may be an automobile, a truck, a train, an airplane, a boat, and other suitable means of transportation. The transmitter is similar to that ofFIG. 10 and, therefore, does not need to be explained again. However, inFIG. 20 thetransmitter 200 may include apresence detector 280, anenclosed detector 290, or a combination thereof, connected to the controller 214 (also referred to as a processor herein). Thecontroller 214 may adjust an amount of power delivered by theamplifier 210 in response to presence signals from thepresence detector 280 and theenclosed detector 290. The transmitter may receive power through a number of power sources, such as, for example, an AC-DC converter (not shown) to convert conventional AC power present in avehicle 299, a DC-DC converter (not shown) to convert a conventional DC power source to a voltage suitable for thetransmitter 200, or directly from a conventional DC power source (not shown). - As a non-limiting example, the
presence detector 280 may be a motion detector utilized to sense the initial presence of a device to be charged that is inserted into the coverage area of the transmitter. After detection, the transmitter is turned on and the RF power received by the device is used to toggle a switch on the Rx device in a pre-determined manner, which in turn results in changes to the driving point impedance of the transmitter. - As another non-limiting example, the
presence detector 280 may be a detector capable of detecting a human, for example, by infrared detection, motion detection, or other suitable means. In some exemplary embodiments, there may be regulations limiting the amount of power that a transmit antenna may transmit at a specific frequency. In some cases, these regulations are meant to protect humans from electromagnetic radiation. However, there may be environments where transmit antennas are placed in areas not occupied by humans, or occupied infrequently by humans, such as, for example, garages, factory floors, shops, and the like. If these environments are free from humans, it may be permissible to increase the power output of the transmit antennas above the normal power restrictions regulations. In other words, thecontroller 214 may adjust the power output of the transmitantenna 204 to a regulatory level or lower in response to human presence and adjust the power output of the transmitantenna 204 to a level above the regulatory level when a human is outside a regulatory distance from the electromagnetic field of the transmitantenna 204. - As a non-limiting example, the enclosed detector 290 (may also be referred to herein as an enclosed compartment detector or an enclosed space detector) may be a device such as a sense switch for determining when an enclosure is in a closed or open state, as is explained more fully below. In many of the examples below, only one receiver device is shown being charged. In practice, a multiplicity of the devices can be charged from a near-field generated by each host.
- In exemplary embodiments, a method by which the
transmitter 200 does not remain on indefinitely may be used. In this case, thetransmitter 200 may be programmed to shut off after a user-determined amount of time. This feature prevents thetransmitter 200, notably the power amplifier, from running long after the wireless devices in its perimeter are fully charged. This event may be due to the failure of the circuit to detect the signal sent from either the repeater or the receive coil that a device is fully charged. To prevent thetransmitter 200 from automatically shutting down if another device is placed in its perimeter, thetransmitter 200 automatic shut off feature may be activated only after a set period of lack of motion detected in its perimeter. The user may be able to determine the inactivity time interval, and change it as desired. As a non-limiting example, the time interval may be longer than that needed to fully charge a specific type of wireless device under the assumption of the device being initially fully discharged. - Exemplary embodiments of the invention include using elements in vehicles and other modes of transportation such as storage bins, dashboards, stowable surfaces, consoles and storage bags to bear power transmitting devices housing totally, or partially, the transmit antenna and other circuitry necessary for wireless transfer of power to other often smaller receiver devices.
- The power transmitting devices may be partially or fully embedded in the aforementioned vehicles and vehicle elements, such as at the time of manufacture.
- The power transmitting devices may also be retrofitted into existing vehicle elements by attaching the transmit antenna thereto. Such vehicle elements are referred to herein as existing vehicle items. In this context, attachment may mean affixing the antenna to a an existing vehicle item, such as, for example, a wall or the underside of a compartment so the transmit antenna is held in place. Attachment may also mean simply placing the transmit antenna in a position where it will naturally be held in place, such as, for example, in the bottom of a compartment or on a dashboard.
- Electrically small antennas have low efficiency, often no more than a few percent as explained by the theory of small antennas. The smaller the electric size of an antenna, the lower is its efficiency. The wireless power transfer can become a viable technique replacing wired connection to the electric grid in industrial, commercial, and household applications if power can be sent over meaningful distances to the devices that are in the receiving end of such power transfer system. While this distance is application dependent, a few tens of a centimeter to a few meters can be deemed a suitable range for most applications. Generally, this range reduces the effective frequency for the electric power in the interval between 5 MHz to 100 MHz.
- Exemplary embodiments of the invention include converting a variety of the vehicle elements to hosts that can transfer electric power wirelessly to guest devices either to charge their rechargeable batteries or to directly feed them.
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FIGS. 21 and 22 are plan views of block diagrams of a multiple transmit antenna wireless charging apparatus, in accordance with exemplary embodiments. As stated, locating a receiver in a near-field coupling mode region of a transmitter for engaging the receiver in wireless charging may be unduly burdensome by requiring accurate positioning of the receiver in the transmit antenna's near-field coupling mode region. Furthermore, locating a receiver in the near-field coupling mode region of a fixed-location transmit antenna may also be inaccessible by a user of a device coupled to the receiver especially when multiple receivers are respectively coupled to multiple user accessible devices (e.g., laptops, PDAs, wireless devices) where users need concurrent physical access to the devices. For example, a single transmit antenna exhibits a finite near-field coupling mode region. - Accordingly, a user of a device charging through a receiver in the transmit antenna's near-field coupling mode region may require a considerable user access space that would be prohibitive or at least inconvenient for another user of another device to also wirelessly charge within the same transmit antenna's near-field coupling mode region and also require separate user access space. For example, covering a large automobile trunk area configured with a single transmit antenna may make it difficult to access devices in different areas of the trunk due to the local nature of the transmitters near-field coupling mode region.
- Referring to
FIG. 21 , an exemplary embodiment of a multiple transmit antennawireless charging apparatus 700 provides for placement of a plurality of adjacently located transmitantenna circuits 702A-702D to define an enlarged wireless charging region 708. By way of example and not limitation, a transmit antenna circuit includes a transmit antenna 710 having a diameter or side dimension, for example, of around 30-40 centimeters for providing uniform coupling to an receive antenna (not shown) that is associated with or fits in an electronic device (e.g., wireless device, handset, PDA, laptop, etc.). By considering the transmit antenna circuit 702 as a unit or cell of the multiple transmit antennawireless charging apparatus 700, stacking or adjacently tiling these transmitantenna circuits 702A-702D next to each other, for example, on substantially a single planar surface 704 (e.g., on a table top) allows for reorienting or increasing the charging region. The enlarged wireless charging region 708 results in an increased charging region for one or more devices. - The multiple transmit antenna
wireless charging apparatus 700 further includes a transmitpower amplifier 720 for providing the driving signal to transmit antennas 710. In configurations where the near-field coupling mode region of one transmit antenna 710 interferes with the near-field coupling mode regions of other transmit antennas 710, the interfering adjacent transmit antennas 710 are “cloaked” to allow improved wireless charging efficiency of the activated transmit antenna 710. - The sequencing of activation of transmit antennas 710 in multiple transmit antenna
wireless charging apparatus 700 may occur according to a time-domain based sequence. The output of transmitpower amplifier 720 is coupled to amultiplexer 722 which time-multiplexes, according to control signal 724 from the transmitter processor, the output signal from the transmitpower amplifier 720 to each of the transmit antennas 710. - In order to inhibit inducing resonance in adjacent inactive transmit antenna 710 when the
power amplifier 720 is driving the active transmit antenna, the inactive antennas may be “cloaked” by altering the resonant frequency of that transmit antenna by, for example, activating the cloaking circuit 714. By way of implementation, concurrent operation of directly or nearly adjacent transmit antenna circuits 702 may result in interfering effects between concurrently activated and physically nearby or adjacent other transmit antenna circuits 702. Accordingly, transmit antenna circuit 702 may further include a transmitter cloaking circuit 714 for altering the resonant frequency of transmit antennas 710. - The transmitter cloaking circuit may be configured as a switching means (e.g. a switch) for shorting-out or altering the value of reactive elements, for example capacitor 716, of the transmit antenna 710. The switching means may be controlled by
control signals 721 from the transmitter's processor. In operation, one of the transmit antennas 710 is activated and allowed to resonate while other of transmit antennas 710 are inhibited from resonating, and therefore inhibited from adjacently interfering with the activated transmit antenna 710. Accordingly, by shorting-out or altering the capacitance of a transmit antenna 710, the resonant frequency of transmit antenna 710 is altered to prevent resonant coupling from other transmit antennas 710. Other techniques for altering the resonant frequency are also contemplated. - In another exemplary embodiment, each of the transmit antenna circuits 702 can determine the presence or absence of receivers within their respective near-field coupling mode regions with the transmitter processor choosing to activate ones of the transmit antenna circuits 702 when receivers are present and ready for wireless charging or forego activating ones of the transmit antenna circuits 702 when receivers are not present or not ready for wireless charging in the respective near-field coupling mode regions. The detection of present or ready receivers may occur according to the receiver detection signaling protocol described herein or may occur according to physical sensing of receivers such as motion sensing, pressure sensing, image sensing or other sensing techniques for determining the presence of a receiver within a transmit antenna's near-field coupling mode region. Furthermore, preferential activation of one or more transmit antenna circuits by providing an enhanced proportional duty cycle to at least one of the plurality of antenna circuits is also contemplated to be within the scope of the present invention.
- Referring to
FIG. 22 , an exemplary embodiment of a multiple transmit antennawireless charging apparatus 800 provides for placement of a plurality of adjacently locatedrepeater antenna circuits 802A-802D inside of a transmitantenna 801 defining an enlargedwireless charging region 808. Transmitantenna 801, when driven by transmitpower amplifier 820, induces resonant coupling to each of therepeater antennas 810A-810D. By way of example and not limitation, a repeater antenna 810 having a diameter or side dimension, for example, of around 30-40 centimeters provides uniform coupling to a receive antenna (not shown) that is associated with or affixed to an electronic device. By considering the repeater antenna circuit 802 as a unit or cell of the multiple transmit antennawireless charging apparatus 800, stacking or adjacently tiling theserepeater antenna circuits 802A-802D next to each other on substantially a single planar surface 804 (e.g., on a table top) allows for increasing or enlarging the charging region. The enlargedwireless charging region 808 results in an increased charging space for one or more devices. - The multiple transmit antenna
wireless charging apparatus 800 includes transmitpower amplifier 820 for providing the driving signal to transmitantenna 801. In configurations where the near-field coupling mode region of one repeater antenna 810 interferes with the near-field coupling mode regions of other repeater antennas 810, the interfering adjacent repeater antennas 810 are “cloaked” to allow improved wireless charging efficiency of the activated repeater antenna 810. - The sequencing of activation of repeater antennas 810 in multiple transmit antenna
wireless charging apparatus 800 may occur according to a time-domain based sequence. The output of transmitpower amplifier 820 is generally constantly coupled (except during receiver signaling as described herein) to transmitantenna 801. In the present exemplary embodiment, the repeater antennas 810 are time-multiplexed according tocontrol signals 821 from the transmitter processor. By way of implementation, concurrent operation of directly or nearly adjacent repeater antenna circuits 802 may result in interfering effects between concurrently activated and physically nearby or adjacent other repeater antennas circuits 802. Accordingly, repeater antenna circuit 802 my further include a repeater cloaking circuit 814 for altering the resonant frequency of repeater antennas 810. - The repeater cloaking circuit may be configured as a switching means (e.g. a switch) for shorting-out or altering the value of reactive elements, for example capacitor 816, of the repeater antenna 810. The switching means may be controlled by
control signals 821 from the transmitter's processor. In operation, one of the repeater antennas 810 is activated and allowed to resonate while other of repeater antennas 810 are inhibited from resonating, and therefore adjacently interfering with the activated repeater antenna 810. Accordingly, by shorting-out or altering the capacitance of a repeater antenna 810, the resonant frequency of repeater antenna 810 is altered to prevent resonant coupling from other repeater antennas 810. Other techniques for altering the resonant frequency are also contemplated. - In another exemplary embodiment, each of the repeater antenna circuits 802 can determine the presence or absence of receivers within their respective near-field coupling mode regions with the transmitter processor choosing to activate ones of the repeater antenna circuits 802 when receivers are present and ready for wireless charging or forego activating ones of the repeater antenna circuits 802 when receivers are not present or not ready for wireless charging in the respective near-field coupling mode regions. The detection of present or ready receivers may occur according to the receiver detection signaling protocol described herein or may occur according to physical sensing of receivers such as motion sensing, pressure sensing, image sensing or other sensing techniques for determining a receiver to be within a repeater antenna's near-field coupling mode region.
- The various exemplary embodiments of the multiple transmit antenna
wireless charging apparatus - As stated, efficient transfer of energy between the transmitter and receiver occurs during matched or nearly matched resonance between the transmitter and the receiver. However, even when resonance between the transmitter and receiver are not matched, energy may be transferred at a lower efficiency. Transfer of energy occurs by coupling energy from the near-field of the transmitting antenna to the receiving antenna residing in the neighborhood where this near-field is established rather than propagating the energy from the transmitting antenna into free space.
- It should be noted that the foregoing approach is applicable to variety of communication standards such as CDMA, WCDMA, OFDM etc Those of skill in the art would understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
-
FIGS. 21 and 22 illustrate multiple loops in a charging region that is substantially planar. However, embodiments of the present invention are not so limited. In the exemplary embodiments described herein, multi-dimensional regions with multiple antennas may be performed by the techniques described herein. In addition, multi-dimensional wireless powering and charging may be employed, such as the means described in U.S. patent application Ser. No. 12/567,339, entitled “SYSTEMS AND METHOD RELATING TO MULTI-DIMENSIONAL WIRELESS CHARGING” filed on Sep. 25, 2009, the contents of which are hereby incorporated by reference in its entirety for all purposes. - When placing one or more devices in a wireless charging apparatus (e.g. near-field magnetic resonance, inductive coupling, etc.) the orientation between the receiver and the wireless charging apparatus transmit antenna(s) may vary. For example, when charging a medical device while disinfecting it in a solution bath or when charging tools while working under water. When a device is dropped into a container with fluid inside, the angle in which the device lands on the bottom of the container would depend on the way its mass is distributed. As another non-limiting example, when the wireless charging apparatus takes the form of a box or a bowl, careless placement of the device, while convenient, may not guarantee the useful positioning of the device with respect to the wireless charging apparatus. The wireless charging apparatus may also be integrated into a large container or cabinet that can hold many devices, such as a glove box, a console, a baggage trunk, a container in a vehicle for professional equipment (e.g. field technician equipment) or an enclosure designed specifically for wireless charging. The receiver integration into these devices may be inconsistent because the devices have different form factors and may be placed in different orientations relative to the wireless power transmitter.
- Existing designs of wireless charging apparatus may perform best under a predefined orientation and deliver lower power levels if the orientation between the wireless charging apparatus and the receiver is different. In addition, when the charged device is placed in a position where only a portion of the wireless power can be delivered, charging times may increase. Some solutions may design the wireless charging apparatus in a way that requires a user to place the device in a special cradle or holder that positions the device to be charged in an advantageous orientation, resulting in a loss of convenience to the user.
- Other approaches are based on inductive coupling between a transmit antenna embedded, for example, in a “charging” mat or surface and a receive antenna plus rectifying circuit embedded in the host device to be charged. In this approach the spacing between transmit and receive antennas generally must be very close (e.g., several millimeters).
- In addition, it is desirable to have wireless power available in places most used by the users for placement of their device to be charged, to enable users to charge their device more conveniently. Many users prefer storing objects in containers or inside furniture as part of maintaining their home, vehicle, or workplace organized. Sometimes they put the devices in the storage space while they are inside a bag, a pocket or a package (e.g. in a retail store). However, given the need to maintain the devices charged the user has to deal with taking them out and charging them. The user may also forget to charge these devices and be subject to delay when the devices are actually needed.
-
FIGS. 23A-23C illustrate an exemplary embodiment of an item bearing transmit antennas oriented in multiple directions. This multi-dimension orientation may increase the power that can be delivered to the receiver positioned in various orientations in respect to the multiple dimensions of the transmit antennas. - In
FIGS. 23A-23C , a three-dimensional wireless charging apparatus is shown in which the transmit antenna(s) are embedded in approximately orthogonal surfaces along the X, Y, and Z axes. The surfaces can be for example, three sides of a rectangular enclosure. Flexibility is provided so that any one of the three Tx antennas, any pair of them, or all three at once can be used to wirelessly provide RF power to the Rx antenna in a device placed within the enclosure. A means such as that discussed above with respect toFIGS. 21 and 22 may be used for selecting and multiplexing between the differently oriented antennas. - In
FIGS. 23A-23C , anexemplary tool 930 is disposed in abox 910. A first-orientation transmitantenna 912 is disposed on a bottom of thebox 910. A second-orientation transmitantenna 914 is disposed on a first side of thebox 910 and a third-orientation transmitantenna 916 is disposed on a second side of thebox 910 and substantially orthogonal to the second-orientation transmitantenna 914.FIG. 23A illustrates thebox 910 with the lid open to show thetool 930 disposed therein.FIG. 23B illustrates thebox 910 with the lid closed. -
FIG. 23C illustrates an alternate configuration of a continuous loop transmitantenna 920 that includes multiple facets in substantially orthogonal directions. If the exemplary embodiment ofFIG. 23C , the continuous loop transmitantenna 920 includes afirst facet 922 along the bottom of thebox 910, asecond facet 924 along a side of thebox 910, and athird facet 926 along the back of thebox 910. - In a small wireless charging apparatus, there maybe only one transmitter in each dimension. In a large wireless charging apparatus, where the parallel panels are sufficiently far from each other to prevent interference, a transmitter may be set on the opposite panels so that devices placed in the middle between them can get power from both directions.
-
FIGS. 24A and 24B illustrate an exemplary embodiment of acabinet 950 bearing transmit antennas oriented in multiple directions with transmit antennas in opposite panels.FIG. 24A shows thecabinet 950 with an open door andFIG. 24B shows thecabinet 950 with the door closed. - Transmit
antennas cabinet 950. Transmitantennas cabinet 950. Transmitantennas cabinet 950. - Referring to
FIGS. 23A-24B , a self-calibrating method that defines the optimal selection of Tx antennas leading to the highest power received by the device may be provided. If multiple devices are to be charged in the same enclosure, a means to assign a different selection of Tx antennas to each device is possible by assigning different time slots to each device. -
FIGS. 23A-23C illustrate ageneric box 910 andFIGS. 24A and 24B illustrate ageneric cabinet 950. However, thisbox 910 orcabinet 950 could be any enclosure in a vehicle, such as, for example, a glove box, a console, a baggage trunk, a container in a vehicle for professional equipment (e.g. field technician equipment), or an enclosure designed specifically for wireless charging - In an exemplary embodiment, the frequency of operations is chosen to be low enough such the reasonably-sized Tx antennas are within the near-field regions of each other. This allows for much higher coupling levels (−1.5 to −3 dB) than would be possible if the antennas were spaced farther apart. The orthogonality of the surfaces the embedded Tx antennas results in the electromagnetic fields radiated by them to be approximately orthogonally polarized which in turn improves the isolation between them so that the power lost due to unwanted coupling is reduced. Allowing the power transmitted from each Tx antenna to be intelligently selectable allows for the reduction efficiency losses due to polarization mismatch between the ensemble of Tx and the arbitrarily placed Rx antenna.
- In an exemplary embodiment, each Rx device and Tx antenna may utilize techniques for signaling between them described in above with respect to
FIGS. 13A-15D . In addition, more sophisticated signaling means may be employed, such as the means described in U.S. patent application Ser. No. 12/249,816, entitled “SIGNALING CHARGING IN WIRELESS POWER ENVIRONMENT” filed on Oct. 10, 2008, the contents of which is hereby incorporated herein in its entirety by reference. - These signaling methods can be used during a “calibration period,” in which power is transmitted for all each possible combination of Tx antennas in sequence and the Rx signals back which results the highest power received. The Tx system can then begin the charging period using this optimum combination of Tx antennas. For charging multiple, arbitrarily-oriented devices in the same enclosure, the signaling scheme allows the Tx system to assign a device a time slot of duration of 1/N times T where N is the number of units being charged and T is the charging period. During its time slot, the Rx device can determine the optimum combination of Tx antennas for best power transfer, independent of the combination desired for the other Rx devices. This is not to say that time slotting is required for optimum power transfer to multiple devices. It is possible for instance, that the relative orientations of two Rx devices are such that the polarizations of their antennas are orthogonal to each other (e.g., X-Y plane for device A, Y-Z plane for device B). In this case, the optimum Tx antenna configuration would be to use the Tx antenna oriented in the X-Y plane for device A and the Tx antenna in the Y-Z plane for device B. Due to the inherent isolation between the two Tx antennas, it may be possible to charge them simultaneously. The intelligent nature of the Tx antenna selection by each Rx device allows for such a circumstance.
- Exemplary embodiments of the invention include converting a variety of the equipment around vehicles to hosts with transmitters, repeaters, or a combination thereof that can transfer electric power wirelessly to guest devices with receivers either to charge their rechargeable batteries or to directly feed them. This equipment may be generally referred to herein as vehicle elements and existing vehicle items. Thus, these vehicle elements can provide several hot spots in the environment where the hosts are located for wireless transfer of power to guest devices without having to establish independent infrastructure for wireless transmission of electric power. These exemplary embodiments may not require a large transmit antenna, which is often more difficult to blend into the décor of the environment and may not be as esthetically acceptable. In addition, larger antennas may generate larger electromagnetic (EM) fields and it may be harder to comply with safety issues.
- Exemplary embodiments disclosed may use transmit antennas in vehicle elements as well as extra antennas such as repeaters in the same or other vehicle elements. These repeaters could be fed with electric power or they could be passively terminated. The combination of the repeaters and the coupled antennas in the power transfer system can be optimized such that coupling of power to very small Rx antennas is enhanced. The termination load and tuning component in the repeaters could also be used to optimize the power transfers in a system.
-
FIGS. 25-31 illustrate exemplary transportation modes, such as vehicles, trains, etc in which exemplary embodiments of the invention can be practiced. For exemplary purposes, trains, planes and automobiles are used herein but it is understood that the exemplary embodiments of the invention are not limited to such. - Within a transportation means, wireless charging may be useful for charging nearby items within the coupling-mode region such as, for example, music players, personal digital assistants, cell phones, radar detectors, navigational units such as GPS, etc.
- In addition, any of these exemplary embodiments and other embodiments within the scope of the present invention that have an enclosed region may use the
enclosed detector 290 discussed above with reference toFIG. 20 for determining whether the vehicle element is in an enclosed state or an open state. When in an enclosed state, enhanced power levels may be possible. Theenclosed detector 290 may be any sensor capable of detecting an enclosed state, such as, for example, a switch on a door or drawer. Furthermore, any of these exemplary embodiments and other embodiments within the scope of the present invention that may use thepresence detector 280 discussed above with reference toFIG. 20 for determining if a receiver device is within the coupling-mode region of a transmit antenna or if a human is near the coupling-mode region and adjust power levels of the transmit antennas in response to those determinations. - The wireless charging can be implemented, for example, using inductive coupling, near-field magnetic resonance power energy transfer, etc. The transmitter can be integrated (built in), laid over or attached to one or more internal surfaces (shelf, side panel, back panel, upper panel, etc). The receiver is connected to the electronic device as an accessory or is integrated into it.
- In the inductive coupling implementation, there may be a designated spot, active area, slot, shelf, groove or holder where a primary coil is integrated or set using an overlaying pad attached to the internal panel of the storage area. The charged device is placed in this designated location to align the receiving coil with the transmitting coil in order to ensure adequate alignment (and therefore coupling) between the transmitting and receiving coil. As a non-limiting example, the designated area can be in the form of a special slot within a console or glove box of an automobile.
- In the near-field magnetic resonance implementation, the transmitting loop can be added to one or multiple internal surfaces of the storage area. When adding to one surface, the charged device can be placed in parallel to that surface and may be charged within a short distance from it (depending on the power level that is transmitted). The charged device with the receiver can be placed anywhere within the transmitting loop boundaries. The transmitting loop layout in the storage area may be such that it would prevent users from placing the charged device on its boundaries. Adding additional antennas to multiple surfaces provides further flexibility in the orientation of the charged device as explained above with reference to
FIGS. 23A-24B . These multi-orientation transmit antennas and repeater antennas may be especially helpful if the receiver device is placed inside a storage area that contains other items on top of each other (e.g. a storage bin) or inside a bag that is then placed in a coupling-mode region. -
FIG. 25 illustrates an exemplary embodiment of anantenna 1015 disposed in or on a section of anautomobile dashboard 1010. Theantenna 1015 may be a transmit antenna or a repeater antenna. Theantenna 1015 may be originally manufactured as part of the dashboard 1010 (i.e., a vehicle element). Integrating a transmit antenna into plastic or other non-conductive materials of the dashboard may improve coupling. - In addition, the
antenna 1015 may be disposed on thedashboard 1010 afterwards (i.e., an existing vehicle item). As a non-limiting example, theantenna 1015 may be under, over, or embedded in a dashboard charging pad (not shown) that rests on thedashboard 1010. - Currently aftermarket automotive electronics such as radar detectors and navigational units that may be placed near the dashboard may be powered via wired connections to the automotive power supply system (typically the cigarette lighter). Using exemplary embodiment of the invention, automotive consumer electronics can be wirelessly powered while they are on or near the automotive dashboard. Wirelessly charging automotive electronics using a charging pad placed on the
dashboard 1010 reduces in-car cabling, and allows multiple automotive-electronic devices to be powered simultaneously. - Exemplary embodiment include a wirelessly charging dashboard pad with an
antenna 1015 that is capable of one or more of the following, amongst others: a) may be plugged into the automotive electrical systems through a cigarette lighter, USB port, or other auxiliary plug, (b) may rest on the dashboard underneath the automotive electronics to be charged, and (c) may be flexible to fit the contour and color of the car's dashboard. -
FIG. 26 illustrates an exemplary embodiment of antennas (1025, 1035, and 1037) in or on anautomobile console 1020. In these exemplary embodiment, the transmit antennas (1025, 1035, and 1037) may be originally manufactured as part of the console 1020 (i.e., a vehicle element) or the transmit antennas (1025, 1035, and 1037) may be disposed on or in theconsole 1020 afterwards (i.e., an existing vehicle item). These exemplary embodiments allow drivers to charge electronic devices in a convenient, safe manner while driving. In an exemplary embodiment, the cup-holders 1030 andstorage bin 1022 are in natural locations where many drivers already place their portable electronic equipment while driving. Converting thecup holders 1030 andstorage bin 1022 into wireless charging areas allows consumers to charge their equipment in a natural, convenient manner. - As a non-limiting example,
antennas 1035 may be integrated into a base of thecup holders 1030 or placed in the bottom of thecup holders 1030 to create a coupling-mode region therein. In addition, other antennas, such as substantiallyvertical antenna 1037 may be added to create a three-dimensional wireless charging apparatus when placed orthogonal to thebase antennas 1035. - As another non-limiting example,
antenna 1025 may be integrated into a base or a lid of thestorage bin 1022 to create a coupling-mode region therein. While not illustrated inFIG. 26 , those of ordinary skill in the art will recognize that within the scope of the present invention, the storage bin may be a good candidate for a three-dimensional wireless charging apparatus by augmenting theantenna 1035 in the base or the lid with one or more additional antennas orthogonal to thefirst antenna 1025 in the storage bin. Furthermore, as explained above with reference toFIG. 20 , presence detection and enclosed state detection may be used to adjust power levels of the transmit antennas (1025, 1035, and 1037). -
FIG. 27 illustrates an exemplary embodiment of anantenna 1045 disposed in or on afloor mat 1040 for an automobile. In an exemplary embodiment, thewireless charging transmitter 1045 could be embedded into thefloor mat 1040. Thus, allowing devices resting on the floor of the car to be charged. -
FIGS. 28A and 28B illustrate an exemplary embodiment of anantenna 1065 disposed in or on anautomobile storage bin 1060. The storage bin may be a compartment such as, for example, a glove box or a coin box.FIGS. 29A and 29B illustrate an exemplary embodiment of anautomobile storage bin 1060 including transmitantennas 1065 oriented in multiple directions. Theantennas 1065 may be transmit antennas, repeater antennas, or a combination thereof. Theantennas 1065 may be originally manufactured as part of the storage bin 1060 (i.e., a vehicle element). Integrating a transmit antenna into plastic or other non-conductive materials of thestorage bin 1060 may improve coupling. - In addition, the
antenna 1065 may be disposed in thestorage bin 1060 afterwards (i.e., an existing vehicle item). As a non-limiting example, the transmitantennas 1065 may be attached to the door, base, sides, back, or top of thestorage bin 1060. - An
auto glove box 1060 is often used to store personal items while driving. When a portable electronic device, such as a cell phone, portable media player, camera, or any other electronic component that can be charged is placed in theauto glove box 1060 it generally cannot be connected to the car charger outside theglove box 1060. The auto glove box may also contain other personal items. Therefore, solutions for charging inside the glove box should take into account the position of the charged device inside theglove box 1060 in regards to the orientation between the receive antenna and the transmitantenna 1065. - In
FIG. 28A asingle antenna 1065 is shown in a base of thestorage bin 1060. InFIG. 28B , areceiver device 1069 including a receive antenna is shown along with the transmitantenna 1065 in thestorage bin 1060. - In
FIG. 29A multiple transmitantennas 1065 are shown in substantially orthogonal placements within thestorage bin 1060. InFIG. 29B , areceiver device 1069 including a receive antenna is shown in thestorage bin 1060. For clarity, the multiple transmitantennas 1065 are not shown inFIG. 29B . - Furthermore, as explained above with reference to
FIG. 20 , presence detection and enclosed state detection may be used to adjust power levels of the transmitantennas 1065 in the exemplary embodiments ofFIGS. 28A-29B . -
FIG. 30 illustrates an exemplary embodiment of a transmitantenna 1075 disposed in or on astorage bag 1078 draped over a back of aseat 1072 of an automobile to create a coupling-mode region 1076 in and around thestorage bag 1078. As another example, theantenna 1075 may be integrated into, or attached to, a pocket in the back of the seat in front of a user, such as in the back of a car's front seat. Passengers seated on planes, trains, automobiles, buses, taxis, and the like could have their electronic devices on their person be charged while they are seated, or place their electronic devices in the pocket in the back of the seat in front of them and have the charger within that pocket charge the traveler's consumer electronic devices. As non-limiting examples, the transmitantenna 1075 may be integrated into each seat (i.e., a vehicle element) on a mass transport vehicle and would be oriented to charge electronic devices that were in the possession of the person sitting behind the charger. Alternatively, the transmitantenna 1075 may be integrated into the pocket in the back of the seat in front of the traveler. The wireless charging technique of magnetic resonance may be well suited to such a wireless charger as it would not need exact placement of the consumer electronic device receiving the charge. Charging devices in this manner may permit devices to be charged without any interaction by the owner of the device and may reduce the frequency with which devices needed to be consciously placed in charging stations of any sort. Thus, a transmitantenna 1075 embedded within the seat may allow devices to be charged while the owner of the device was traveling in the vehicle. - In an exemplary embodiment, a transmit
antenna 1075 may be inserted inside the seat in front of the owner of the electronic devices that would be receiving the charge. The charging unit may be vertically oriented and capable of charging devices that were in the possession of the person seated behind the charger. In another exemplary embodiment, a transmitantenna 1075 may be inserted into the pocket orstorage bag 1078 in the back of the seat in front of the traveler and would only charge devices placed within the pocket. This lower range requirement may allow for a lower, and hence safer, transmit power level. -
FIG. 31 illustrates an exemplary embodiment of a transmitantenna 1085 disposed in or on astowable surface 1080 in a vehicle, such as for example a tray that folds down, folds out of an arm rest, or is otherwise positioned for the convenience of a user seated in a seat of a vehicle such as those on airplane trains, and buses. In this exemplary embodiment, a charging pad may be attached to the tray table 1080 or integrated into the tray table 1080. By embedding a transmitantenna 1085 into the tray table 1080 to create a coupling-mode region 1086, charging service can be provided to devices on or near the tray table 1080. Thus, the duration that those electronic devices can operate without re-charging may be extended without the need for awkward charging cables needing to be connected to the electronic devices on the tray table 1080. - In an exemplary embodiment of the a wireless charging in an
airplane tray 1080, the wireless charging pad would be attached to or integrated into thetray 1080 that is mounted on the seat in-front of each passenger. The wireless charging pad or transmitantenna 1085 may be embedded in the plastic of thetray 1080 itself, and may use a magnetic resonance wireless charging technology such that exact placement of the consumer electronic device on the tray was unnecessary. The wireless charging pad may get power from the aircraft electrical system. Thus, a wireless power transmitter in atray 1080 of a mass transit vehicle, such as an airplane may extend the powered duration for consumer electronics used during flight, reduce the clutter caused by wired charging cables during flight, and charge devices in a user friendly way so that the device is fully charged when the user departs the aircraft. This charging may match user behavior and may occur even if the device is not used during flight, but was simply placed on the aircraft tray. -
FIG. 32 is asimplified flow chart 2100 illustrating acts that may be performed in one or more exemplary embodiments of the present invention. Various exemplary embodiments may include some or all of the acts illustrated inFIG. 32 , as well as other acts not illustrated. Inoperation 2102, a wireless charging apparatus including one or more transmit antennas, one or more repeater antennas, or a combination thereof may be disposed on or in a vehicle element or an existing vehicle item. Inoperation 2104, an electromagnetic field at a resonant frequency of the transmit antenna may be generated to create a coupling-mode region within a near-field of the transmit antenna. Inoperation 2106, a receive device with a receive antenna may be disposed in the coupling-mode region. - In
operation 2108, the process may check to see if a receiver is present in the coupling-mode region. If so, inoperation 2110 the wireless charging apparatus may apply power, or increase power, to the transmit antenna. If not, inoperation 2112 the wireless charging apparatus may remove power from, or decrease power to, the transmit antenna. - In
operation 2114, the process may check to see if the vehicle element is in an enclosed state. If so, inoperation 2116 the wireless charging apparatus may increase the power to the transmit antenna to a level that is compatible with an enclosed state of the vehicle element. - In
operation 2118, the process may check to see if a human is present in or near the coupling-mode region. If so, inoperation 2120 the wireless charging apparatus may adjust the power output of the transmit antenna to a regulatory level or lower. If not, inoperation 2124 the wireless charging apparatus may adjust the power output of the transmit antenna above the regulatory level. - Those of skill in the art would understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
- Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the exemplary embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the exemplary embodiments of the invention.
- The various illustrative logical blocks, modules, and circuits described in connection with the embodiments disclosed herein may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
- The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), flash memory, Read Only Memory (ROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
- In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
- The previous description of the disclosed exemplary embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these exemplary embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (25)
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Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120146425A1 (en) * | 2010-12-14 | 2012-06-14 | Samsung Electro-Mechanics Co., Ltd. | Wireless power transmission/reception apparatus and method |
US20120234971A1 (en) * | 2011-03-14 | 2012-09-20 | Simmonds Precision Products, Inc. | Wireless Power Transmission System and Method for an Aircraft Sensor System |
US20130082649A1 (en) * | 2011-09-30 | 2013-04-04 | Hyun Seok Lee | Wireless charging system |
US20140252813A1 (en) * | 2013-03-11 | 2014-09-11 | Robert Bosch Gmbh | Contactless Power Transfer System |
US9438063B2 (en) | 2010-07-09 | 2016-09-06 | Industrial Technology Research Institute | Charge apparatus |
US9522604B2 (en) | 2014-08-04 | 2016-12-20 | Ford Global Technologies, Llc | Inductive wireless power transfer system having a coupler assembly comprising moveable permeable panels |
US20170179767A1 (en) * | 2015-12-21 | 2017-06-22 | Industrial Technology Research Institute | Coil assembly and wireless power transmission system |
US9698632B2 (en) | 2014-05-09 | 2017-07-04 | Otter Products, Llc | Wireless battery charger and charge-receiving device |
US9729187B1 (en) | 2016-02-01 | 2017-08-08 | Otter Products, Llc | Case with electrical multiplexing |
US9906066B2 (en) | 2015-04-13 | 2018-02-27 | Motorola Solutions, Inc. | Visor-mountable wireless charger and method of wireless charging |
US9979206B2 (en) | 2012-09-07 | 2018-05-22 | Solace Power Inc. | Wireless electric field power transfer system, method, transmitter and receiver therefor |
US10033225B2 (en) | 2012-09-07 | 2018-07-24 | Solace Power Inc. | Wireless electric field power transmission system, transmitter and receiver therefor and method of wirelessly transferring power |
US10164468B2 (en) | 2015-06-16 | 2018-12-25 | Otter Products, Llc | Protective cover with wireless charging feature |
US10211664B2 (en) | 2010-07-09 | 2019-02-19 | Industrial Technology Research Institute | Apparatus for transmission of wireless energy |
US10326488B2 (en) | 2015-04-01 | 2019-06-18 | Otter Products, Llc | Electronic device case with inductive coupling features |
US20190334383A1 (en) * | 2009-07-22 | 2019-10-31 | Sony Corporation | Power receiving apparatus, power transmission system, charging apparatus and power transmission method |
USD906958S1 (en) | 2019-05-13 | 2021-01-05 | Otter Products, Llc | Battery charger |
US10958103B2 (en) | 2018-08-14 | 2021-03-23 | Otter Products, Llc | Stackable battery pack system with wireless charging |
US11025097B2 (en) * | 2017-05-15 | 2021-06-01 | Ningbo Weie Electronics Technology Ltd. | Wireless charging management system and wireless power transmitting terminal |
Families Citing this family (388)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7825543B2 (en) | 2005-07-12 | 2010-11-02 | Massachusetts Institute Of Technology | Wireless energy transfer |
US8805530B2 (en) | 2007-06-01 | 2014-08-12 | Witricity Corporation | Power generation for implantable devices |
US9421388B2 (en) | 2007-06-01 | 2016-08-23 | Witricity Corporation | Power generation for implantable devices |
US9130407B2 (en) | 2008-05-13 | 2015-09-08 | Qualcomm Incorporated | Signaling charging in wireless power environment |
EP2281322B1 (en) | 2008-05-14 | 2016-03-23 | Massachusetts Institute of Technology | Wireless energy transfer, including interference enhancement |
WO2010030195A1 (en) * | 2008-09-11 | 2010-03-18 | Auckland Uniservices Limited | Inductively coupled ac power transfer |
US8946938B2 (en) * | 2008-09-27 | 2015-02-03 | Witricity Corporation | Safety systems for wireless energy transfer in vehicle applications |
US9093853B2 (en) | 2008-09-27 | 2015-07-28 | Witricity Corporation | Flexible resonator attachment |
US8471410B2 (en) | 2008-09-27 | 2013-06-25 | Witricity Corporation | Wireless energy transfer over distance using field shaping to improve the coupling factor |
US8692410B2 (en) | 2008-09-27 | 2014-04-08 | Witricity Corporation | Wireless energy transfer with frequency hopping |
US8912687B2 (en) | 2008-09-27 | 2014-12-16 | Witricity Corporation | Secure wireless energy transfer for vehicle applications |
US8901778B2 (en) | 2008-09-27 | 2014-12-02 | Witricity Corporation | Wireless energy transfer with variable size resonators for implanted medical devices |
US9105959B2 (en) | 2008-09-27 | 2015-08-11 | Witricity Corporation | Resonator enclosure |
US8629578B2 (en) | 2008-09-27 | 2014-01-14 | Witricity Corporation | Wireless energy transfer systems |
US8552592B2 (en) | 2008-09-27 | 2013-10-08 | Witricity Corporation | Wireless energy transfer with feedback control for lighting applications |
US8304935B2 (en) | 2008-09-27 | 2012-11-06 | Witricity Corporation | Wireless energy transfer using field shaping to reduce loss |
US8692412B2 (en) | 2008-09-27 | 2014-04-08 | Witricity Corporation | Temperature compensation in a wireless transfer system |
US8963488B2 (en) | 2008-09-27 | 2015-02-24 | Witricity Corporation | Position insensitive wireless charging |
US9601266B2 (en) | 2008-09-27 | 2017-03-21 | Witricity Corporation | Multiple connected resonators with a single electronic circuit |
US9160203B2 (en) | 2008-09-27 | 2015-10-13 | Witricity Corporation | Wireless powered television |
US9396867B2 (en) | 2008-09-27 | 2016-07-19 | Witricity Corporation | Integrated resonator-shield structures |
US9246336B2 (en) | 2008-09-27 | 2016-01-26 | Witricity Corporation | Resonator optimizations for wireless energy transfer |
US9035499B2 (en) | 2008-09-27 | 2015-05-19 | Witricity Corporation | Wireless energy transfer for photovoltaic panels |
US8669676B2 (en) | 2008-09-27 | 2014-03-11 | Witricity Corporation | Wireless energy transfer across variable distances using field shaping with magnetic materials to improve the coupling factor |
US8497601B2 (en) | 2008-09-27 | 2013-07-30 | Witricity Corporation | Wireless energy transfer converters |
US8569914B2 (en) | 2008-09-27 | 2013-10-29 | Witricity Corporation | Wireless energy transfer using object positioning for improved k |
US9601270B2 (en) | 2008-09-27 | 2017-03-21 | Witricity Corporation | Low AC resistance conductor designs |
US8482158B2 (en) | 2008-09-27 | 2013-07-09 | Witricity Corporation | Wireless energy transfer using variable size resonators and system monitoring |
US8772973B2 (en) | 2008-09-27 | 2014-07-08 | Witricity Corporation | Integrated resonator-shield structures |
US9515494B2 (en) | 2008-09-27 | 2016-12-06 | Witricity Corporation | Wireless power system including impedance matching network |
US8947186B2 (en) | 2008-09-27 | 2015-02-03 | Witricity Corporation | Wireless energy transfer resonator thermal management |
US9318922B2 (en) | 2008-09-27 | 2016-04-19 | Witricity Corporation | Mechanically removable wireless power vehicle seat assembly |
US8587153B2 (en) | 2008-09-27 | 2013-11-19 | Witricity Corporation | Wireless energy transfer using high Q resonators for lighting applications |
US8461721B2 (en) | 2008-09-27 | 2013-06-11 | Witricity Corporation | Wireless energy transfer using object positioning for low loss |
US8922066B2 (en) | 2008-09-27 | 2014-12-30 | Witricity Corporation | Wireless energy transfer with multi resonator arrays for vehicle applications |
US8937408B2 (en) | 2008-09-27 | 2015-01-20 | Witricity Corporation | Wireless energy transfer for medical applications |
US8957549B2 (en) | 2008-09-27 | 2015-02-17 | Witricity Corporation | Tunable wireless energy transfer for in-vehicle applications |
US8598743B2 (en) | 2008-09-27 | 2013-12-03 | Witricity Corporation | Resonator arrays for wireless energy transfer |
US9106203B2 (en) | 2008-09-27 | 2015-08-11 | Witricity Corporation | Secure wireless energy transfer in medical applications |
US8400017B2 (en) | 2008-09-27 | 2013-03-19 | Witricity Corporation | Wireless energy transfer for computer peripheral applications |
US9184595B2 (en) | 2008-09-27 | 2015-11-10 | Witricity Corporation | Wireless energy transfer in lossy environments |
US8686598B2 (en) | 2008-09-27 | 2014-04-01 | Witricity Corporation | Wireless energy transfer for supplying power and heat to a device |
US8324759B2 (en) | 2008-09-27 | 2012-12-04 | Witricity Corporation | Wireless energy transfer using magnetic materials to shape field and reduce loss |
US8901779B2 (en) | 2008-09-27 | 2014-12-02 | Witricity Corporation | Wireless energy transfer with resonator arrays for medical applications |
US8466583B2 (en) | 2008-09-27 | 2013-06-18 | Witricity Corporation | Tunable wireless energy transfer for outdoor lighting applications |
US8461720B2 (en) | 2008-09-27 | 2013-06-11 | Witricity Corporation | Wireless energy transfer using conducting surfaces to shape fields and reduce loss |
US8907531B2 (en) | 2008-09-27 | 2014-12-09 | Witricity Corporation | Wireless energy transfer with variable size resonators for medical applications |
US9744858B2 (en) | 2008-09-27 | 2017-08-29 | Witricity Corporation | System for wireless energy distribution in a vehicle |
US8643326B2 (en) | 2008-09-27 | 2014-02-04 | Witricity Corporation | Tunable wireless energy transfer systems |
US8723366B2 (en) | 2008-09-27 | 2014-05-13 | Witricity Corporation | Wireless energy transfer resonator enclosures |
US8587155B2 (en) | 2008-09-27 | 2013-11-19 | Witricity Corporation | Wireless energy transfer using repeater resonators |
US8410636B2 (en) | 2008-09-27 | 2013-04-02 | Witricity Corporation | Low AC resistance conductor designs |
US8461722B2 (en) | 2008-09-27 | 2013-06-11 | Witricity Corporation | Wireless energy transfer using conducting surfaces to shape field and improve K |
US8933594B2 (en) | 2008-09-27 | 2015-01-13 | Witricity Corporation | Wireless energy transfer for vehicles |
US8928276B2 (en) | 2008-09-27 | 2015-01-06 | Witricity Corporation | Integrated repeaters for cell phone applications |
US9601261B2 (en) | 2008-09-27 | 2017-03-21 | Witricity Corporation | Wireless energy transfer using repeater resonators |
US8441154B2 (en) | 2008-09-27 | 2013-05-14 | Witricity Corporation | Multi-resonator wireless energy transfer for exterior lighting |
JP2012504387A (en) | 2008-09-27 | 2012-02-16 | ウィトリシティ コーポレーション | Wireless energy transfer system |
US9065423B2 (en) | 2008-09-27 | 2015-06-23 | Witricity Corporation | Wireless energy distribution system |
US8476788B2 (en) | 2008-09-27 | 2013-07-02 | Witricity Corporation | Wireless energy transfer with high-Q resonators using field shaping to improve K |
US9577436B2 (en) | 2008-09-27 | 2017-02-21 | Witricity Corporation | Wireless energy transfer for implantable devices |
US9544683B2 (en) | 2008-09-27 | 2017-01-10 | Witricity Corporation | Wirelessly powered audio devices |
US8487480B1 (en) | 2008-09-27 | 2013-07-16 | Witricity Corporation | Wireless energy transfer resonator kit |
EP2345100B1 (en) | 2008-10-01 | 2018-12-05 | Massachusetts Institute of Technology | Efficient near-field wireless energy transfer using adiabatic system variations |
MY179186A (en) | 2009-01-06 | 2020-10-30 | Philips Ip Ventures B V | Wireless charging system with device power compliance |
US8854224B2 (en) | 2009-02-10 | 2014-10-07 | Qualcomm Incorporated | Conveying device information relating to wireless charging |
US9312924B2 (en) | 2009-02-10 | 2016-04-12 | Qualcomm Incorporated | Systems and methods relating to multi-dimensional wireless charging |
US20100201201A1 (en) * | 2009-02-10 | 2010-08-12 | Qualcomm Incorporated | Wireless power transfer in public places |
US20100201311A1 (en) * | 2009-02-10 | 2010-08-12 | Qualcomm Incorporated | Wireless charging with separate process |
US20100201312A1 (en) * | 2009-02-10 | 2010-08-12 | Qualcomm Incorporated | Wireless power transfer for portable enclosures |
US8374545B2 (en) * | 2009-09-02 | 2013-02-12 | Qualcomm Incorporated | De-tuning in wireless power reception |
US8624547B2 (en) * | 2009-12-28 | 2014-01-07 | Toyoda Gosei Co, Ltd | Recharging or connection tray for portable electronic devices |
JP5211088B2 (en) * | 2010-02-12 | 2013-06-12 | トヨタ自動車株式会社 | Power feeding device and vehicle power feeding system |
KR101104513B1 (en) * | 2010-02-16 | 2012-01-12 | 서울대학교산학협력단 | Method and system for multiple wireless power transmission using time division scheme |
US9561730B2 (en) | 2010-04-08 | 2017-02-07 | Qualcomm Incorporated | Wireless power transmission in electric vehicles |
US10343535B2 (en) | 2010-04-08 | 2019-07-09 | Witricity Corporation | Wireless power antenna alignment adjustment system for vehicles |
KR101744162B1 (en) * | 2010-05-03 | 2017-06-07 | 삼성전자주식회사 | Apparatus and Method of control of matching of source-target structure |
US8692505B2 (en) * | 2010-07-09 | 2014-04-08 | Industrial Technology Research Institute | Charge apparatus |
JP2012044827A (en) * | 2010-08-23 | 2012-03-01 | Midori Anzen Co Ltd | Non-contact charger |
US9602168B2 (en) | 2010-08-31 | 2017-03-21 | Witricity Corporation | Communication in wireless energy transfer systems |
FR2964518B1 (en) * | 2010-09-06 | 2013-03-08 | Continental Automotive France | METHOD AND TRANSMITTER FOR OPTIMIZING RF TRANSMISSION POWER OF REMOTE VEHICLE CONTROL SYSTEM |
US9391476B2 (en) | 2010-09-09 | 2016-07-12 | Semiconductor Energy Laboratory Co., Ltd. | Power feeding device, wireless power feeding system using the same and wireless power feeding method |
US8981714B2 (en) * | 2010-09-15 | 2015-03-17 | Toyoda Gosei Co. Ltd. | Storage tray with charging |
KR101777221B1 (en) * | 2011-01-03 | 2017-09-26 | 삼성전자주식회사 | Wireless power transmission apparatus and System for wireless power transmission thereof |
JP2012143146A (en) * | 2011-01-03 | 2012-07-26 | Samsung Electronics Co Ltd | Wireless power transmission apparatus and wireless power transmission system thereof |
US9819209B2 (en) * | 2011-01-18 | 2017-11-14 | Texas Instrument Incorporated | Contactless charging of BLUETOOTH other wireless headsets |
JP5264974B2 (en) | 2011-02-01 | 2013-08-14 | 本田技研工業株式会社 | Non-contact power transmission device |
JP2012165527A (en) | 2011-02-04 | 2012-08-30 | Nitto Denko Corp | Wireless power supply system |
US9148201B2 (en) * | 2011-02-11 | 2015-09-29 | Qualcomm Incorporated | Systems and methods for calibration of a wireless power transmitter |
JP5439416B2 (en) * | 2011-03-04 | 2014-03-12 | 株式会社東芝 | Wireless power transmission device |
EP2518863A1 (en) * | 2011-04-27 | 2012-10-31 | Research In Motion Limited | Methods and apparatuses for wireless power transfer |
US9948145B2 (en) | 2011-07-08 | 2018-04-17 | Witricity Corporation | Wireless power transfer for a seat-vest-helmet system |
CN108110907B (en) | 2011-08-04 | 2022-08-02 | 韦特里西提公司 | Tunable wireless power supply architecture |
SG11201400409XA (en) * | 2011-09-07 | 2014-04-28 | Solace Power Inc | Wireless electric field power transmission system and method |
ES2558182T3 (en) | 2011-09-09 | 2016-02-02 | Witricity Corporation | Detection of foreign objects in wireless energy transfer systems |
US9571162B2 (en) * | 2011-09-09 | 2017-02-14 | The Chugoku Electric Power Co., Inc. | Non-contact power supply system and non-contact power supply method |
KR101305579B1 (en) * | 2011-09-09 | 2013-09-09 | 엘지이노텍 주식회사 | Wireless power relay apparatus and wireless power transmission system |
KR101241712B1 (en) | 2011-09-09 | 2013-03-11 | 엘지이노텍 주식회사 | A wireless power reception apparatus and method thereof |
KR20130028446A (en) * | 2011-09-09 | 2013-03-19 | 엘지이노텍 주식회사 | A wireless power transmission apparatus and method thereof |
US20130062966A1 (en) | 2011-09-12 | 2013-03-14 | Witricity Corporation | Reconfigurable control architectures and algorithms for electric vehicle wireless energy transfer systems |
US9318257B2 (en) | 2011-10-18 | 2016-04-19 | Witricity Corporation | Wireless energy transfer for packaging |
KR20140085591A (en) | 2011-11-04 | 2014-07-07 | 위트리시티 코포레이션 | Wireless energy transfer modeling tool |
JP2013118734A (en) * | 2011-12-01 | 2013-06-13 | Panasonic Corp | Non-contact electric power transmission apparatus |
JP5379841B2 (en) * | 2011-12-08 | 2013-12-25 | 株式会社ホンダアクセス | In-vehicle charger |
US9306635B2 (en) | 2012-01-26 | 2016-04-05 | Witricity Corporation | Wireless energy transfer with reduced fields |
EP2810356A1 (en) * | 2012-02-05 | 2014-12-10 | Humavox Ltd. | Remote charging system |
US8933589B2 (en) | 2012-02-07 | 2015-01-13 | The Gillette Company | Wireless power transfer using separately tunable resonators |
US9276645B2 (en) | 2012-03-29 | 2016-03-01 | GM Global Technology Operations LLC | Inductive charger for providing radio frequency (“RF”) signal to a portable electric device |
US9124109B2 (en) | 2012-03-30 | 2015-09-01 | Toyota Motor Engineering & Manufacturing North America, Inc. | Console assembly with charging state indicator |
US9343922B2 (en) | 2012-06-27 | 2016-05-17 | Witricity Corporation | Wireless energy transfer for rechargeable batteries |
DE102012012860A1 (en) * | 2012-06-28 | 2014-01-23 | Siemens Aktiengesellschaft | Provide an association connection |
US10218227B2 (en) | 2014-05-07 | 2019-02-26 | Energous Corporation | Compact PIFA antenna |
US10439448B2 (en) | 2014-08-21 | 2019-10-08 | Energous Corporation | Systems and methods for automatically testing the communication between wireless power transmitter and wireless power receiver |
US9252628B2 (en) | 2013-05-10 | 2016-02-02 | Energous Corporation | Laptop computer as a transmitter for wireless charging |
US10103582B2 (en) | 2012-07-06 | 2018-10-16 | Energous Corporation | Transmitters for wireless power transmission |
US9831718B2 (en) | 2013-07-25 | 2017-11-28 | Energous Corporation | TV with integrated wireless power transmitter |
US9825674B1 (en) | 2014-05-23 | 2017-11-21 | Energous Corporation | Enhanced transmitter that selects configurations of antenna elements for performing wireless power transmission and receiving functions |
US9899861B1 (en) | 2013-10-10 | 2018-02-20 | Energous Corporation | Wireless charging methods and systems for game controllers, based on pocket-forming |
US9853458B1 (en) | 2014-05-07 | 2017-12-26 | Energous Corporation | Systems and methods for device and power receiver pairing |
US10381880B2 (en) | 2014-07-21 | 2019-08-13 | Energous Corporation | Integrated antenna structure arrays for wireless power transmission |
US9891669B2 (en) | 2014-08-21 | 2018-02-13 | Energous Corporation | Systems and methods for a configuration web service to provide configuration of a wireless power transmitter within a wireless power transmission system |
US10128699B2 (en) | 2014-07-14 | 2018-11-13 | Energous Corporation | Systems and methods of providing wireless power using receiver device sensor inputs |
US10124754B1 (en) | 2013-07-19 | 2018-11-13 | Energous Corporation | Wireless charging and powering of electronic sensors in a vehicle |
US10193396B1 (en) | 2014-05-07 | 2019-01-29 | Energous Corporation | Cluster management of transmitters in a wireless power transmission system |
US9843213B2 (en) | 2013-08-06 | 2017-12-12 | Energous Corporation | Social power sharing for mobile devices based on pocket-forming |
US10090886B1 (en) | 2014-07-14 | 2018-10-02 | Energous Corporation | System and method for enabling automatic charging schedules in a wireless power network to one or more devices |
US9793758B2 (en) | 2014-05-23 | 2017-10-17 | Energous Corporation | Enhanced transmitter using frequency control for wireless power transmission |
US9867062B1 (en) | 2014-07-21 | 2018-01-09 | Energous Corporation | System and methods for using a remote server to authorize a receiving device that has requested wireless power and to determine whether another receiving device should request wireless power in a wireless power transmission system |
US9859756B2 (en) | 2012-07-06 | 2018-01-02 | Energous Corporation | Transmittersand methods for adjusting wireless power transmission based on information from receivers |
US9900057B2 (en) | 2012-07-06 | 2018-02-20 | Energous Corporation | Systems and methods for assigning groups of antenas of a wireless power transmitter to different wireless power receivers, and determining effective phases to use for wirelessly transmitting power using the assigned groups of antennas |
US20150326070A1 (en) | 2014-05-07 | 2015-11-12 | Energous Corporation | Methods and Systems for Maximum Power Point Transfer in Receivers |
US9954374B1 (en) | 2014-05-23 | 2018-04-24 | Energous Corporation | System and method for self-system analysis for detecting a fault in a wireless power transmission Network |
US10199849B1 (en) | 2014-08-21 | 2019-02-05 | Energous Corporation | Method for automatically testing the operational status of a wireless power receiver in a wireless power transmission system |
US9838083B2 (en) | 2014-07-21 | 2017-12-05 | Energous Corporation | Systems and methods for communication with remote management systems |
US10224758B2 (en) | 2013-05-10 | 2019-03-05 | Energous Corporation | Wireless powering of electronic devices with selective delivery range |
US10050462B1 (en) | 2013-08-06 | 2018-08-14 | Energous Corporation | Social power sharing for mobile devices based on pocket-forming |
US10263432B1 (en) | 2013-06-25 | 2019-04-16 | Energous Corporation | Multi-mode transmitter with an antenna array for delivering wireless power and providing Wi-Fi access |
US10199835B2 (en) | 2015-12-29 | 2019-02-05 | Energous Corporation | Radar motion detection using stepped frequency in wireless power transmission system |
US9824815B2 (en) | 2013-05-10 | 2017-11-21 | Energous Corporation | Wireless charging and powering of healthcare gadgets and sensors |
US10211674B1 (en) | 2013-06-12 | 2019-02-19 | Energous Corporation | Wireless charging using selected reflectors |
US9124125B2 (en) | 2013-05-10 | 2015-09-01 | Energous Corporation | Wireless power transmission with selective range |
US9893555B1 (en) | 2013-10-10 | 2018-02-13 | Energous Corporation | Wireless charging of tools using a toolbox transmitter |
US9991741B1 (en) | 2014-07-14 | 2018-06-05 | Energous Corporation | System for tracking and reporting status and usage information in a wireless power management system |
US9887584B1 (en) | 2014-08-21 | 2018-02-06 | Energous Corporation | Systems and methods for a configuration web service to provide configuration of a wireless power transmitter within a wireless power transmission system |
US9973021B2 (en) | 2012-07-06 | 2018-05-15 | Energous Corporation | Receivers for wireless power transmission |
US9853692B1 (en) | 2014-05-23 | 2017-12-26 | Energous Corporation | Systems and methods for wireless power transmission |
US9812890B1 (en) | 2013-07-11 | 2017-11-07 | Energous Corporation | Portable wireless charging pad |
US9893554B2 (en) | 2014-07-14 | 2018-02-13 | Energous Corporation | System and method for providing health safety in a wireless power transmission system |
US9882427B2 (en) | 2013-05-10 | 2018-01-30 | Energous Corporation | Wireless power delivery using a base station to control operations of a plurality of wireless power transmitters |
US9876648B2 (en) | 2014-08-21 | 2018-01-23 | Energous Corporation | System and method to control a wireless power transmission system by configuration of wireless power transmission control parameters |
US10148097B1 (en) | 2013-11-08 | 2018-12-04 | Energous Corporation | Systems and methods for using a predetermined number of communication channels of a wireless power transmitter to communicate with different wireless power receivers |
US9438045B1 (en) | 2013-05-10 | 2016-09-06 | Energous Corporation | Methods and systems for maximum power point transfer in receivers |
US10270261B2 (en) | 2015-09-16 | 2019-04-23 | Energous Corporation | Systems and methods of object detection in wireless power charging systems |
US9843201B1 (en) | 2012-07-06 | 2017-12-12 | Energous Corporation | Wireless power transmitter that selects antenna sets for transmitting wireless power to a receiver based on location of the receiver, and methods of use thereof |
US9941707B1 (en) | 2013-07-19 | 2018-04-10 | Energous Corporation | Home base station for multiple room coverage with multiple transmitters |
US10206185B2 (en) | 2013-05-10 | 2019-02-12 | Energous Corporation | System and methods for wireless power transmission to an electronic device in accordance with user-defined restrictions |
US10063105B2 (en) | 2013-07-11 | 2018-08-28 | Energous Corporation | Proximity transmitters for wireless power charging systems |
US10211680B2 (en) | 2013-07-19 | 2019-02-19 | Energous Corporation | Method for 3 dimensional pocket-forming |
US10224982B1 (en) | 2013-07-11 | 2019-03-05 | Energous Corporation | Wireless power transmitters for transmitting wireless power and tracking whether wireless power receivers are within authorized locations |
US10243414B1 (en) | 2014-05-07 | 2019-03-26 | Energous Corporation | Wearable device with wireless power and payload receiver |
US9941747B2 (en) | 2014-07-14 | 2018-04-10 | Energous Corporation | System and method for manually selecting and deselecting devices to charge in a wireless power network |
US9847677B1 (en) | 2013-10-10 | 2017-12-19 | Energous Corporation | Wireless charging and powering of healthcare gadgets and sensors |
US10992185B2 (en) | 2012-07-06 | 2021-04-27 | Energous Corporation | Systems and methods of using electromagnetic waves to wirelessly deliver power to game controllers |
US9899873B2 (en) | 2014-05-23 | 2018-02-20 | Energous Corporation | System and method for generating a power receiver identifier in a wireless power network |
US10063064B1 (en) | 2014-05-23 | 2018-08-28 | Energous Corporation | System and method for generating a power receiver identifier in a wireless power network |
US9887739B2 (en) | 2012-07-06 | 2018-02-06 | Energous Corporation | Systems and methods for wireless power transmission by comparing voltage levels associated with power waves transmitted by antennas of a plurality of antennas of a transmitter to determine appropriate phase adjustments for the power waves |
US11502551B2 (en) | 2012-07-06 | 2022-11-15 | Energous Corporation | Wirelessly charging multiple wireless-power receivers using different subsets of an antenna array to focus energy at different locations |
US9806564B2 (en) | 2014-05-07 | 2017-10-31 | Energous Corporation | Integrated rectifier and boost converter for wireless power transmission |
US9893768B2 (en) | 2012-07-06 | 2018-02-13 | Energous Corporation | Methodology for multiple pocket-forming |
US10291055B1 (en) | 2014-12-29 | 2019-05-14 | Energous Corporation | Systems and methods for controlling far-field wireless power transmission based on battery power levels of a receiving device |
US9368020B1 (en) | 2013-05-10 | 2016-06-14 | Energous Corporation | Off-premises alert system and method for wireless power receivers in a wireless power network |
US10256657B2 (en) | 2015-12-24 | 2019-04-09 | Energous Corporation | Antenna having coaxial structure for near field wireless power charging |
US9871398B1 (en) | 2013-07-01 | 2018-01-16 | Energous Corporation | Hybrid charging method for wireless power transmission based on pocket-forming |
US9859797B1 (en) | 2014-05-07 | 2018-01-02 | Energous Corporation | Synchronous rectifier design for wireless power receiver |
US10075008B1 (en) | 2014-07-14 | 2018-09-11 | Energous Corporation | Systems and methods for manually adjusting when receiving electronic devices are scheduled to receive wirelessly delivered power from a wireless power transmitter in a wireless power network |
US20140008993A1 (en) | 2012-07-06 | 2014-01-09 | DvineWave Inc. | Methodology for pocket-forming |
US10223717B1 (en) | 2014-05-23 | 2019-03-05 | Energous Corporation | Systems and methods for payment-based authorization of wireless power transmission service |
US9912199B2 (en) | 2012-07-06 | 2018-03-06 | Energous Corporation | Receivers for wireless power transmission |
US9143000B2 (en) | 2012-07-06 | 2015-09-22 | Energous Corporation | Portable wireless charging pad |
US9948135B2 (en) | 2015-09-22 | 2018-04-17 | Energous Corporation | Systems and methods for identifying sensitive objects in a wireless charging transmission field |
US10230266B1 (en) | 2014-02-06 | 2019-03-12 | Energous Corporation | Wireless power receivers that communicate status data indicating wireless power transmission effectiveness with a transmitter using a built-in communications component of a mobile device, and methods of use thereof |
US10141791B2 (en) | 2014-05-07 | 2018-11-27 | Energous Corporation | Systems and methods for controlling communications during wireless transmission of power using application programming interfaces |
US10992187B2 (en) | 2012-07-06 | 2021-04-27 | Energous Corporation | System and methods of using electromagnetic waves to wirelessly deliver power to electronic devices |
US10008889B2 (en) | 2014-08-21 | 2018-06-26 | Energous Corporation | Method for automatically testing the operational status of a wireless power receiver in a wireless power transmission system |
US10211682B2 (en) | 2014-05-07 | 2019-02-19 | Energous Corporation | Systems and methods for controlling operation of a transmitter of a wireless power network based on user instructions received from an authenticated computing device powered or charged by a receiver of the wireless power network |
US10312715B2 (en) | 2015-09-16 | 2019-06-04 | Energous Corporation | Systems and methods for wireless power charging |
US10965164B2 (en) | 2012-07-06 | 2021-03-30 | Energous Corporation | Systems and methods of wirelessly delivering power to a receiver device |
US9923386B1 (en) | 2012-07-06 | 2018-03-20 | Energous Corporation | Systems and methods for wireless power transmission by modifying a number of antenna elements used to transmit power waves to a receiver |
US9787103B1 (en) | 2013-08-06 | 2017-10-10 | Energous Corporation | Systems and methods for wirelessly delivering power to electronic devices that are unable to communicate with a transmitter |
US10128693B2 (en) | 2014-07-14 | 2018-11-13 | Energous Corporation | System and method for providing health safety in a wireless power transmission system |
US10063106B2 (en) | 2014-05-23 | 2018-08-28 | Energous Corporation | System and method for a self-system analysis in a wireless power transmission network |
US10291066B1 (en) | 2014-05-07 | 2019-05-14 | Energous Corporation | Power transmission control systems and methods |
US9882430B1 (en) | 2014-05-07 | 2018-01-30 | Energous Corporation | Cluster management of transmitters in a wireless power transmission system |
US9876394B1 (en) | 2014-05-07 | 2018-01-23 | Energous Corporation | Boost-charger-boost system for enhanced power delivery |
US10038337B1 (en) | 2013-09-16 | 2018-07-31 | Energous Corporation | Wireless power supply for rescue devices |
US9847679B2 (en) | 2014-05-07 | 2017-12-19 | Energous Corporation | System and method for controlling communication between wireless power transmitter managers |
US9906065B2 (en) | 2012-07-06 | 2018-02-27 | Energous Corporation | Systems and methods of transmitting power transmission waves based on signals received at first and second subsets of a transmitter's antenna array |
US9966765B1 (en) | 2013-06-25 | 2018-05-08 | Energous Corporation | Multi-mode transmitter |
US10205239B1 (en) | 2014-05-07 | 2019-02-12 | Energous Corporation | Compact PIFA antenna |
US9876379B1 (en) | 2013-07-11 | 2018-01-23 | Energous Corporation | Wireless charging and powering of electronic devices in a vehicle |
US10186913B2 (en) | 2012-07-06 | 2019-01-22 | Energous Corporation | System and methods for pocket-forming based on constructive and destructive interferences to power one or more wireless power receivers using a wireless power transmitter including a plurality of antennas |
US9939864B1 (en) | 2014-08-21 | 2018-04-10 | Energous Corporation | System and method to control a wireless power transmission system by configuration of wireless power transmission control parameters |
US9941754B2 (en) | 2012-07-06 | 2018-04-10 | Energous Corporation | Wireless power transmission with selective range |
US9859757B1 (en) | 2013-07-25 | 2018-01-02 | Energous Corporation | Antenna tile arrangements in electronic device enclosures |
US10090699B1 (en) | 2013-11-01 | 2018-10-02 | Energous Corporation | Wireless powered house |
US10141768B2 (en) | 2013-06-03 | 2018-11-27 | Energous Corporation | Systems and methods for maximizing wireless power transfer efficiency by instructing a user to change a receiver device's position |
US9859745B2 (en) | 2012-07-10 | 2018-01-02 | Samsung Electronics Co., Ltd | Wireless power transmitter, wireless power receiver, and method for controlling same |
US9287607B2 (en) | 2012-07-31 | 2016-03-15 | Witricity Corporation | Resonator fine tuning |
US9154189B2 (en) * | 2012-08-17 | 2015-10-06 | Qualcomm Incorporated | Wireless power system with capacitive proximity sensing |
CN109067014B (en) | 2012-09-05 | 2022-04-15 | 瑞萨电子株式会社 | Non-contact charging device |
KR101409224B1 (en) * | 2012-09-07 | 2014-06-19 | 한국오므론전장 주식회사 | Wireless charging apparatus and method with frequency interference avoidance function in vehicle |
US9595378B2 (en) | 2012-09-19 | 2017-03-14 | Witricity Corporation | Resonator enclosure |
KR101409225B1 (en) * | 2012-10-08 | 2014-06-18 | 한국오므론전장 주식회사 | Charging System Using Cup Holder |
CN109969007A (en) | 2012-10-19 | 2019-07-05 | 韦特里西提公司 | External analyte detection in wireless energy transfer system |
KR20210096686A (en) | 2012-11-05 | 2021-08-05 | 애플 인크. | Inductively coupled power transfer systems |
US9842684B2 (en) | 2012-11-16 | 2017-12-12 | Witricity Corporation | Systems and methods for wireless power system with improved performance and/or ease of use |
CN103840538A (en) * | 2012-11-21 | 2014-06-04 | 江苏天宇光伏科技有限公司 | Wireless charging mobile power supply |
US8783752B2 (en) * | 2012-12-18 | 2014-07-22 | Toyota Motor Engineering & Manufacturing North America, Inc. | Mobile device retention and charging tray |
EP2961036B1 (en) * | 2013-02-19 | 2019-08-21 | Panasonic Intellectual Property Management Co., Ltd. | Foreign object detection device, foreign object detection method, and non-contact charging system |
CN105210264A (en) * | 2013-03-15 | 2015-12-30 | 无线电力公司 | Wireless power transfer in a vehicle |
US9352661B2 (en) * | 2013-04-29 | 2016-05-31 | Qualcomm Incorporated | Induction power transfer system with coupling and reactance selection |
US9538382B2 (en) | 2013-05-10 | 2017-01-03 | Energous Corporation | System and method for smart registration of wireless power receivers in a wireless power network |
US9866279B2 (en) | 2013-05-10 | 2018-01-09 | Energous Corporation | Systems and methods for selecting which power transmitter should deliver wireless power to a receiving device in a wireless power delivery network |
US9419443B2 (en) | 2013-05-10 | 2016-08-16 | Energous Corporation | Transducer sound arrangement for pocket-forming |
US9819230B2 (en) | 2014-05-07 | 2017-11-14 | Energous Corporation | Enhanced receiver for wireless power transmission |
KR102198922B1 (en) * | 2013-05-15 | 2021-01-07 | 지이 하이브리드 테크놀로지스, 엘엘씨 | Multimedia system implementing wireless charge function installed in vehicle, method for replaying multimedia file using the same, and wireless power transmission device used therein |
WO2014192180A1 (en) * | 2013-05-27 | 2014-12-04 | 三菱電機エンジニアリング株式会社 | Multiplex transmission system for wirelessly transmitting power, transmitting side multiplex transmission device, and billing/information system |
CN103259315B (en) * | 2013-05-31 | 2015-04-22 | 苏州源辉电气有限公司 | Electric automobile charge and discharge switch and control circuit and control method thereof |
US10103552B1 (en) | 2013-06-03 | 2018-10-16 | Energous Corporation | Protocols for authenticated wireless power transmission |
US10003211B1 (en) | 2013-06-17 | 2018-06-19 | Energous Corporation | Battery life of portable electronic devices |
US9590455B2 (en) | 2013-06-26 | 2017-03-07 | Robert Bosch Gmbh | Wireless charging system |
US10021523B2 (en) | 2013-07-11 | 2018-07-10 | Energous Corporation | Proximity transmitters for wireless power charging systems |
US9979440B1 (en) | 2013-07-25 | 2018-05-22 | Energous Corporation | Antenna tile arrangements configured to operate as one functional unit |
US9577448B2 (en) * | 2013-07-30 | 2017-02-21 | Intel Corporation | Integration of wireless charging unit in a wireless device |
WO2015016898A1 (en) | 2013-07-31 | 2015-02-05 | Intel Corporation | Wireless charging unit and coupler based docking combo for a wireless device |
US9216695B2 (en) * | 2013-08-05 | 2015-12-22 | Ford Global Technologies, Llc | Small storage pockets for a vehicle seat assembly |
US9857821B2 (en) | 2013-08-14 | 2018-01-02 | Witricity Corporation | Wireless power transfer frequency adjustment |
US10135304B2 (en) | 2013-09-05 | 2018-11-20 | Lg Innotek Co., Ltd. | Supporter |
US20150091508A1 (en) * | 2013-10-01 | 2015-04-02 | Blackberry Limited | Bi-directional communication with a device under charge |
CN104638695B (en) * | 2013-11-11 | 2020-02-28 | 中兴通讯股份有限公司 | Wireless charging method for mobile terminal, charging emission panel and wireless charging device |
KR20150063821A (en) * | 2013-12-02 | 2015-06-10 | 주식회사 대동 | Apparatus for wireless charging battery in vehicles |
KR101561471B1 (en) * | 2013-12-12 | 2015-10-30 | 주식회사 대동 | Transmitter of Wireless battery charger and control method for vehicles |
US9780573B2 (en) | 2014-02-03 | 2017-10-03 | Witricity Corporation | Wirelessly charged battery system |
US10075017B2 (en) | 2014-02-06 | 2018-09-11 | Energous Corporation | External or internal wireless power receiver with spaced-apart antenna elements for charging or powering mobile devices using wirelessly delivered power |
US9935482B1 (en) | 2014-02-06 | 2018-04-03 | Energous Corporation | Wireless power transmitters that transmit at determined times based on power availability and consumption at a receiving mobile device |
US9952266B2 (en) | 2014-02-14 | 2018-04-24 | Witricity Corporation | Object detection for wireless energy transfer systems |
CN106716763B (en) * | 2014-04-07 | 2020-09-29 | 赛峰座椅美国有限责任公司 | Inductive power transfer in aircraft seats |
DE102014207384A1 (en) * | 2014-04-17 | 2015-10-22 | Bayerische Motoren Werke Aktiengesellschaft | Device and system for electrical charging for a motor vehicle |
WO2015161035A1 (en) | 2014-04-17 | 2015-10-22 | Witricity Corporation | Wireless power transfer systems with shield openings |
US9842687B2 (en) | 2014-04-17 | 2017-12-12 | Witricity Corporation | Wireless power transfer systems with shaped magnetic components |
US10158257B2 (en) | 2014-05-01 | 2018-12-18 | Energous Corporation | System and methods for using sound waves to wirelessly deliver power to electronic devices |
US9966784B2 (en) | 2014-06-03 | 2018-05-08 | Energous Corporation | Systems and methods for extending battery life of portable electronic devices charged by sound |
US9837860B2 (en) | 2014-05-05 | 2017-12-05 | Witricity Corporation | Wireless power transmission systems for elevators |
EP3140680B1 (en) | 2014-05-07 | 2021-04-21 | WiTricity Corporation | Foreign object detection in wireless energy transfer systems |
US9973008B1 (en) | 2014-05-07 | 2018-05-15 | Energous Corporation | Wireless power receiver with boost converters directly coupled to a storage element |
US9800172B1 (en) | 2014-05-07 | 2017-10-24 | Energous Corporation | Integrated rectifier and boost converter for boosting voltage received from wireless power transmission waves |
US10170917B1 (en) | 2014-05-07 | 2019-01-01 | Energous Corporation | Systems and methods for managing and controlling a wireless power network by establishing time intervals during which receivers communicate with a transmitter |
US10153653B1 (en) | 2014-05-07 | 2018-12-11 | Energous Corporation | Systems and methods for using application programming interfaces to control communications between a transmitter and a receiver |
US10153645B1 (en) | 2014-05-07 | 2018-12-11 | Energous Corporation | Systems and methods for designating a master power transmitter in a cluster of wireless power transmitters |
US9876536B1 (en) | 2014-05-23 | 2018-01-23 | Energous Corporation | Systems and methods for assigning groups of antennas to transmit wireless power to different wireless power receivers |
WO2015196123A2 (en) | 2014-06-20 | 2015-12-23 | Witricity Corporation | Wireless power transfer systems for surfaces |
US9842688B2 (en) | 2014-07-08 | 2017-12-12 | Witricity Corporation | Resonator balancing in wireless power transfer systems |
US10574091B2 (en) * | 2014-07-08 | 2020-02-25 | Witricity Corporation | Enclosures for high power wireless power transfer systems |
US10116143B1 (en) | 2014-07-21 | 2018-10-30 | Energous Corporation | Integrated antenna arrays for wireless power transmission |
US9871301B2 (en) | 2014-07-21 | 2018-01-16 | Energous Corporation | Integrated miniature PIFA with artificial magnetic conductor metamaterials |
US10068703B1 (en) | 2014-07-21 | 2018-09-04 | Energous Corporation | Integrated miniature PIFA with artificial magnetic conductor metamaterials |
KR20160011994A (en) * | 2014-07-23 | 2016-02-02 | 현대자동차주식회사 | Method for charging wirelessly |
US9917477B1 (en) | 2014-08-21 | 2018-03-13 | Energous Corporation | Systems and methods for automatically testing the communication between power transmitter and wireless receiver |
US9965009B1 (en) | 2014-08-21 | 2018-05-08 | Energous Corporation | Systems and methods for assigning a power receiver to individual power transmitters based on location of the power receiver |
EP3204999A4 (en) | 2014-10-06 | 2018-06-13 | Robert Bosch GmbH | Wireless charging system for devices in a vehicle |
WO2016088263A1 (en) * | 2014-12-05 | 2016-06-09 | 三菱電機エンジニアリング株式会社 | Resonance-type power transmission device and power feed range control device |
US10122415B2 (en) | 2014-12-27 | 2018-11-06 | Energous Corporation | Systems and methods for assigning a set of antennas of a wireless power transmitter to a wireless power receiver based on a location of the wireless power receiver |
US9843217B2 (en) | 2015-01-05 | 2017-12-12 | Witricity Corporation | Wireless energy transfer for wearables |
US9893535B2 (en) | 2015-02-13 | 2018-02-13 | Energous Corporation | Systems and methods for determining optimal charging positions to maximize efficiency of power received from wirelessly delivered sound wave energy |
US20160322851A1 (en) * | 2015-04-30 | 2016-11-03 | Jtouch Corporation | Hanging-type flexible wireless charging device |
CN208791533U (en) | 2015-06-12 | 2019-04-26 | 新格拉夫解决方案有限责任公司 | Composite article, product and clothes |
CN105024439B (en) * | 2015-07-16 | 2017-04-05 | 上海肖克利信息科技股份有限公司 | A kind of wireless energy storage platform |
DE102015215240A1 (en) * | 2015-08-10 | 2017-02-16 | Volkswagen Aktiengesellschaft | Device for coupling a mobile communication device with a motor vehicle |
US10326299B2 (en) * | 2015-09-11 | 2019-06-18 | Astronics Advanced Electronic Systems Corp. | Moveable surface power delivery system |
US10523033B2 (en) | 2015-09-15 | 2019-12-31 | Energous Corporation | Receiver devices configured to determine location within a transmission field |
US9906275B2 (en) | 2015-09-15 | 2018-02-27 | Energous Corporation | Identifying receivers in a wireless charging transmission field |
US10211685B2 (en) | 2015-09-16 | 2019-02-19 | Energous Corporation | Systems and methods for real or near real time wireless communications between a wireless power transmitter and a wireless power receiver |
US9941752B2 (en) | 2015-09-16 | 2018-04-10 | Energous Corporation | Systems and methods of object detection in wireless power charging systems |
US10186893B2 (en) | 2015-09-16 | 2019-01-22 | Energous Corporation | Systems and methods for real time or near real time wireless communications between a wireless power transmitter and a wireless power receiver |
US11710321B2 (en) | 2015-09-16 | 2023-07-25 | Energous Corporation | Systems and methods of object detection in wireless power charging systems |
US9893538B1 (en) | 2015-09-16 | 2018-02-13 | Energous Corporation | Systems and methods of object detection in wireless power charging systems |
US10778041B2 (en) | 2015-09-16 | 2020-09-15 | Energous Corporation | Systems and methods for generating power waves in a wireless power transmission system |
US9871387B1 (en) | 2015-09-16 | 2018-01-16 | Energous Corporation | Systems and methods of object detection using one or more video cameras in wireless power charging systems |
US10199850B2 (en) | 2015-09-16 | 2019-02-05 | Energous Corporation | Systems and methods for wirelessly transmitting power from a transmitter to a receiver by determining refined locations of the receiver in a segmented transmission field associated with the transmitter |
US10008875B1 (en) | 2015-09-16 | 2018-06-26 | Energous Corporation | Wireless power transmitter configured to transmit power waves to a predicted location of a moving wireless power receiver |
US10158259B1 (en) | 2015-09-16 | 2018-12-18 | Energous Corporation | Systems and methods for identifying receivers in a transmission field by transmitting exploratory power waves towards different segments of a transmission field |
US10050470B1 (en) | 2015-09-22 | 2018-08-14 | Energous Corporation | Wireless power transmission device having antennas oriented in three dimensions |
US10135294B1 (en) | 2015-09-22 | 2018-11-20 | Energous Corporation | Systems and methods for preconfiguring transmission devices for power wave transmissions based on location data of one or more receivers |
US10153660B1 (en) | 2015-09-22 | 2018-12-11 | Energous Corporation | Systems and methods for preconfiguring sensor data for wireless charging systems |
US10033222B1 (en) | 2015-09-22 | 2018-07-24 | Energous Corporation | Systems and methods for determining and generating a waveform for wireless power transmission waves |
US10135295B2 (en) | 2015-09-22 | 2018-11-20 | Energous Corporation | Systems and methods for nullifying energy levels for wireless power transmission waves |
US10027168B2 (en) | 2015-09-22 | 2018-07-17 | Energous Corporation | Systems and methods for generating and transmitting wireless power transmission waves using antennas having a spacing that is selected by the transmitter |
US10020678B1 (en) | 2015-09-22 | 2018-07-10 | Energous Corporation | Systems and methods for selecting antennas to generate and transmit power transmission waves |
US10128686B1 (en) | 2015-09-22 | 2018-11-13 | Energous Corporation | Systems and methods for identifying receiver locations using sensor technologies |
US10248899B2 (en) | 2015-10-06 | 2019-04-02 | Witricity Corporation | RFID tag and transponder detection in wireless energy transfer systems |
US10734717B2 (en) | 2015-10-13 | 2020-08-04 | Energous Corporation | 3D ceramic mold antenna |
US10333332B1 (en) | 2015-10-13 | 2019-06-25 | Energous Corporation | Cross-polarized dipole antenna |
US9929721B2 (en) | 2015-10-14 | 2018-03-27 | Witricity Corporation | Phase and amplitude detection in wireless energy transfer systems |
US10063110B2 (en) | 2015-10-19 | 2018-08-28 | Witricity Corporation | Foreign object detection in wireless energy transfer systems |
EP3365958B1 (en) | 2015-10-22 | 2020-05-27 | WiTricity Corporation | Dynamic tuning in wireless energy transfer systems |
US9853485B2 (en) | 2015-10-28 | 2017-12-26 | Energous Corporation | Antenna for wireless charging systems |
US9899744B1 (en) | 2015-10-28 | 2018-02-20 | Energous Corporation | Antenna for wireless charging systems |
US10135112B1 (en) | 2015-11-02 | 2018-11-20 | Energous Corporation | 3D antenna mount |
US10063108B1 (en) | 2015-11-02 | 2018-08-28 | Energous Corporation | Stamped three-dimensional antenna |
US10027180B1 (en) | 2015-11-02 | 2018-07-17 | Energous Corporation | 3D triple linear antenna that acts as heat sink |
CN106684953A (en) * | 2015-11-09 | 2017-05-17 | 广东欧珀移动通信有限公司 | Wireless charging bag |
US10389140B2 (en) | 2015-11-13 | 2019-08-20 | X Development Llc | Wireless power near-field repeater system that includes metamaterial arrays to suppress far-field radiation and power loss |
US10181729B1 (en) | 2015-11-13 | 2019-01-15 | X Development Llc | Mobile hybrid transmit/receive node for near-field wireless power delivery |
US10075019B2 (en) | 2015-11-20 | 2018-09-11 | Witricity Corporation | Voltage source isolation in wireless power transfer systems |
US10320446B2 (en) | 2015-12-24 | 2019-06-11 | Energous Corporation | Miniaturized highly-efficient designs for near-field power transfer system |
US10079515B2 (en) | 2016-12-12 | 2018-09-18 | Energous Corporation | Near-field RF charging pad with multi-band antenna element with adaptive loading to efficiently charge an electronic device at any position on the pad |
US10038332B1 (en) | 2015-12-24 | 2018-07-31 | Energous Corporation | Systems and methods of wireless power charging through multiple receiving devices |
US11863001B2 (en) | 2015-12-24 | 2024-01-02 | Energous Corporation | Near-field antenna for wireless power transmission with antenna elements that follow meandering patterns |
US10218207B2 (en) | 2015-12-24 | 2019-02-26 | Energous Corporation | Receiver chip for routing a wireless signal for wireless power charging or data reception |
US10256677B2 (en) | 2016-12-12 | 2019-04-09 | Energous Corporation | Near-field RF charging pad with adaptive loading to efficiently charge an electronic device at any position on the pad |
US10027159B2 (en) | 2015-12-24 | 2018-07-17 | Energous Corporation | Antenna for transmitting wireless power signals |
US10008886B2 (en) | 2015-12-29 | 2018-06-26 | Energous Corporation | Modular antennas with heat sinks in wireless power transmission systems |
JP6722462B2 (en) | 2016-01-27 | 2020-07-15 | 日東電工株式会社 | Magnetic field forming device, power feeding device, power receiving device, power receiving and feeding device, portable device, coil device, and magnetic field forming method |
JP6909557B2 (en) * | 2016-01-27 | 2021-07-28 | 日東電工株式会社 | Power supply device and power receiving / receiving device |
JP2017135827A (en) * | 2016-01-27 | 2017-08-03 | 日東電工株式会社 | Magnetic field forming apparatus and power reception device |
JP6767119B2 (en) | 2016-01-27 | 2020-10-14 | 日東電工株式会社 | Magnetic field forming device, power feeding device, and power receiving device |
US10263473B2 (en) | 2016-02-02 | 2019-04-16 | Witricity Corporation | Controlling wireless power transfer systems |
WO2017139406A1 (en) | 2016-02-08 | 2017-08-17 | Witricity Corporation | Pwm capacitor control |
CN105552662B (en) * | 2016-02-25 | 2017-12-08 | 慈溪市明业通讯电子有限公司 | A kind of multifunction wiring board |
US10363820B2 (en) * | 2016-03-31 | 2019-07-30 | Ford Global Technologies, Llc | Wireless power transfer to a tailgate through capacitive couplers |
WO2017172939A1 (en) | 2016-03-31 | 2017-10-05 | Advanced Energy Technologies Llc | Noise suppressing assemblies |
CN107294148A (en) * | 2016-04-01 | 2017-10-24 | 深圳市大疆创新科技有限公司 | Charge-discharge controller, method and battery component |
JP6637826B2 (en) * | 2016-04-20 | 2020-01-29 | 株式会社日立製作所 | On-board communication device |
CN107332293A (en) * | 2016-04-29 | 2017-11-07 | 比亚迪股份有限公司 | Onboard wireless charging method and device |
WO2017209630A1 (en) | 2016-06-01 | 2017-12-07 | Powerbyproxi Limited | A powered joint with wireless transfer |
JP2018038199A (en) * | 2016-09-01 | 2018-03-08 | 大井電気株式会社 | Non-contact power supply device |
KR101927185B1 (en) * | 2016-10-06 | 2018-12-10 | 현대자동차 주식회사 | Multipurpose Rollable moving device |
US10923954B2 (en) | 2016-11-03 | 2021-02-16 | Energous Corporation | Wireless power receiver with a synchronous rectifier |
KR102349607B1 (en) | 2016-12-12 | 2022-01-12 | 에너저스 코포레이션 | Methods of selectively activating antenna zones of a near-field charging pad to maximize wireless power delivered |
US10680319B2 (en) | 2017-01-06 | 2020-06-09 | Energous Corporation | Devices and methods for reducing mutual coupling effects in wireless power transmission systems |
US10439442B2 (en) | 2017-01-24 | 2019-10-08 | Energous Corporation | Microstrip antennas for wireless power transmitters |
US10389161B2 (en) | 2017-03-15 | 2019-08-20 | Energous Corporation | Surface mount dielectric antennas for wireless power transmitters |
US10377315B2 (en) * | 2017-01-16 | 2019-08-13 | Ford Global Technologies, Llc | In-board seat storage |
US10530177B2 (en) * | 2017-03-09 | 2020-01-07 | Cochlear Limited | Multi-loop implant charger |
JP2018158644A (en) * | 2017-03-22 | 2018-10-11 | 豊田合成株式会社 | Console Box |
WO2018183892A1 (en) | 2017-03-30 | 2018-10-04 | Energous Corporation | Flat antennas having two or more resonant frequencies for use in wireless power transmission systems |
KR102335522B1 (en) | 2017-04-03 | 2021-12-03 | 현대자동차주식회사 | pop-up console for the vehicle |
US10511097B2 (en) | 2017-05-12 | 2019-12-17 | Energous Corporation | Near-field antennas for accumulating energy at a near-field distance with minimal far-field gain |
US11462949B2 (en) | 2017-05-16 | 2022-10-04 | Wireless electrical Grid LAN, WiGL Inc | Wireless charging method and system |
EP3631946A4 (en) | 2017-05-30 | 2020-12-09 | Wireless Advanced Vehicle Electrification Inc. | Single feed multi-pad wireless charging |
US10848853B2 (en) | 2017-06-23 | 2020-11-24 | Energous Corporation | Systems, methods, and devices for utilizing a wire of a sound-producing device as an antenna for receipt of wirelessly delivered power |
WO2019006376A1 (en) | 2017-06-29 | 2019-01-03 | Witricity Corporation | Protection and control of wireless power systems |
EP3447994B1 (en) * | 2017-07-03 | 2020-05-06 | Grupo Antolin Ingenieria, S.A.U. | Wireless coupling for coupling a vehicle with an electronic device disposed in an interior part of the vehicle |
CN107801368B (en) * | 2017-08-08 | 2019-01-15 | 朗丝窗饰有限公司 | The system for avoiding Radiation On Human body physical and mental health from damaging |
US10122219B1 (en) | 2017-10-10 | 2018-11-06 | Energous Corporation | Systems, methods, and devices for using a battery as a antenna for receiving wirelessly delivered power from radio frequency power waves |
US11342798B2 (en) | 2017-10-30 | 2022-05-24 | Energous Corporation | Systems and methods for managing coexistence of wireless-power signals and data signals operating in a same frequency band |
CN108363059A (en) * | 2017-12-28 | 2018-08-03 | 北京融创远大网络科技有限公司 | A kind of intelligent vehicle-carried radar installations reducing signal interference |
US11462943B2 (en) | 2018-01-30 | 2022-10-04 | Wireless Advanced Vehicle Electrification, Llc | DC link charging of capacitor in a wireless power transfer pad |
US10615647B2 (en) | 2018-02-02 | 2020-04-07 | Energous Corporation | Systems and methods for detecting wireless power receivers and other objects at a near-field charging pad |
US11159057B2 (en) | 2018-03-14 | 2021-10-26 | Energous Corporation | Loop antennas with selectively-activated feeds to control propagation patterns of wireless power signals |
US11515732B2 (en) | 2018-06-25 | 2022-11-29 | Energous Corporation | Power wave transmission techniques to focus wirelessly delivered power at a receiving device |
DE102018210544A1 (en) * | 2018-06-28 | 2020-01-02 | Laird Dabendorf Gmbh | Method and device for signal transmission to a terminal |
US10812216B2 (en) | 2018-11-05 | 2020-10-20 | XCOM Labs, Inc. | Cooperative multiple-input multiple-output downlink scheduling |
US10756860B2 (en) | 2018-11-05 | 2020-08-25 | XCOM Labs, Inc. | Distributed multiple-input multiple-output downlink configuration |
US10432272B1 (en) | 2018-11-05 | 2019-10-01 | XCOM Labs, Inc. | Variable multiple-input multiple-output downlink user equipment |
US10659112B1 (en) | 2018-11-05 | 2020-05-19 | XCOM Labs, Inc. | User equipment assisted multiple-input multiple-output downlink configuration |
US11437735B2 (en) | 2018-11-14 | 2022-09-06 | Energous Corporation | Systems for receiving electromagnetic energy using antennas that are minimally affected by the presence of the human body |
US11670961B2 (en) | 2018-12-14 | 2023-06-06 | Otis Elevator Company | Closed loop control wireless power transmission system for conveyance system |
US11063645B2 (en) | 2018-12-18 | 2021-07-13 | XCOM Labs, Inc. | Methods of wirelessly communicating with a group of devices |
US10756795B2 (en) | 2018-12-18 | 2020-08-25 | XCOM Labs, Inc. | User equipment with cellular link and peer-to-peer link |
US11330649B2 (en) | 2019-01-25 | 2022-05-10 | XCOM Labs, Inc. | Methods and systems of multi-link peer-to-peer communications |
KR20210117283A (en) | 2019-01-28 | 2021-09-28 | 에너저스 코포레이션 | Systems and methods for a small antenna for wireless power transmission |
US10756767B1 (en) | 2019-02-05 | 2020-08-25 | XCOM Labs, Inc. | User equipment for wirelessly communicating cellular signal with another user equipment |
JP2022519749A (en) | 2019-02-06 | 2022-03-24 | エナージャス コーポレイション | Systems and methods for estimating the optimum phase for use with individual antennas in an antenna array |
US11689065B2 (en) | 2019-02-15 | 2023-06-27 | Honda Motor Co., Ltd. | System and methods for charging a device |
WO2021055898A1 (en) | 2019-09-20 | 2021-03-25 | Energous Corporation | Systems and methods for machine learning based foreign object detection for wireless power transmission |
WO2021055899A1 (en) | 2019-09-20 | 2021-03-25 | Energous Corporation | Systems and methods of protecting wireless power receivers using multiple rectifiers and establishing in-band communications using multiple rectifiers |
US11381118B2 (en) | 2019-09-20 | 2022-07-05 | Energous Corporation | Systems and methods for machine learning based foreign object detection for wireless power transmission |
EP4032169A4 (en) | 2019-09-20 | 2023-12-06 | Energous Corporation | Classifying and detecting foreign objects using a power amplifier controller integrated circuit in wireless power transmission systems |
WO2021119483A1 (en) | 2019-12-13 | 2021-06-17 | Energous Corporation | Charging pad with guiding contours to align an electronic device on the charging pad and efficiently transfer near-field radio-frequency energy to the electronic device |
US10985617B1 (en) | 2019-12-31 | 2021-04-20 | Energous Corporation | System for wirelessly transmitting energy at a near-field distance without using beam-forming control |
CN113131621A (en) * | 2020-01-14 | 2021-07-16 | 北京小米移动软件有限公司 | Wireless charging method and device, terminal equipment, charging system and storage medium |
US11799324B2 (en) | 2020-04-13 | 2023-10-24 | Energous Corporation | Wireless-power transmitting device for creating a uniform near-field charging area |
WO2021262457A2 (en) | 2020-06-12 | 2021-12-30 | Analog Devices International Unlimited Company | Self-calibrating polymer nano composite (pnc) sensing element |
DE102020116323A1 (en) | 2020-06-22 | 2021-12-23 | Audi Aktiengesellschaft | Transport box for a vehicle |
WO2021260226A1 (en) * | 2020-06-26 | 2021-12-30 | Motherson Innovations Company Ltd. | Magnetic resonance wireless charging system for a vehicle |
WO2022025328A1 (en) * | 2020-07-31 | 2022-02-03 | 엘지전자 주식회사 | Wireless power transmission device |
US11916398B2 (en) | 2021-12-29 | 2024-02-27 | Energous Corporation | Small form-factor devices with integrated and modular harvesting receivers, and shelving-mounted wireless-power transmitters for use therewith |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040130425A1 (en) * | 2002-08-12 | 2004-07-08 | Tal Dayan | Enhanced RF wireless adaptive power provisioning system for small devices |
US20050068019A1 (en) * | 2003-09-30 | 2005-03-31 | Sharp Kabushiki Kaisha | Power supply system |
US20080203815A1 (en) * | 2002-12-26 | 2008-08-28 | Takao Ozawa | Vehicle Antitheft Device and Control Method of a Vehicle |
US20080278264A1 (en) * | 2005-07-12 | 2008-11-13 | Aristeidis Karalis | Wireless energy transfer |
US20090072629A1 (en) * | 2007-09-17 | 2009-03-19 | Nigel Power, Llc | High Efficiency and Power Transfer in Wireless Power Magnetic Resonators |
US20090243397A1 (en) * | 2008-03-05 | 2009-10-01 | Nigel Power, Llc | Packaging and Details of a Wireless Power device |
Family Cites Families (310)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1283307B (en) | 1967-10-21 | 1968-11-21 | August Schwer Soehne Gmbh | Antenna amplifier |
US4556837A (en) | 1982-03-24 | 1985-12-03 | Terumo Kabushiki Kaisha | Electronic clinical thermometer |
JPS5931054U (en) | 1982-08-23 | 1984-02-27 | 日本電子機器株式会社 | oxygen sensor |
JPS6369335A (en) | 1986-09-11 | 1988-03-29 | Nippon Denzai Kogyo Kenkyusho:Kk | Contactless transmission equipment |
US4802080A (en) | 1988-03-18 | 1989-01-31 | American Telephone And Telegraph Company, At&T Information Systems | Power transfer circuit including a sympathetic resonator |
EP0444416A1 (en) | 1990-01-26 | 1991-09-04 | Pioneer Electronic Corporation | Motor vehicle-mounted radio wave receiving GPS apparatus |
DE4004196C1 (en) | 1990-02-12 | 1991-04-11 | Texas Instruments Deutschland Gmbh, 8050 Freising, De | Transponder transferring stored measurement data to interrogator - operates without battery using capacitor charged by rectified HF pulses |
KR920011068B1 (en) | 1990-07-25 | 1992-12-26 | 현대전자산업 주식회사 | Secret number changing method in cordlessphone |
JP3344593B2 (en) | 1992-10-13 | 2002-11-11 | 株式会社ソニー木原研究所 | Wireless power supply |
US5287112A (en) | 1993-04-14 | 1994-02-15 | Texas Instruments Incorporated | High speed read/write AVI system |
US5790946A (en) | 1993-07-15 | 1998-08-04 | Rotzoll; Robert R. | Wake up device for a communications system |
JPH0739077A (en) | 1993-07-22 | 1995-02-07 | Sony Corp | Cordless power station |
US5539394A (en) | 1994-03-16 | 1996-07-23 | International Business Machines Corporation | Time division multiplexed batch mode item identification system |
WO1995027338A1 (en) | 1994-04-04 | 1995-10-12 | Motorola Inc. | Method and apparatus for detecting and handling collisions in a radio communication system |
US5520892A (en) | 1994-04-11 | 1996-05-28 | Bowen; John G. | Sterilization unit for dental handpieces and other instruments |
JPH087059A (en) | 1994-06-21 | 1996-01-12 | Sony Chem Corp | Noncontact information card |
MY120873A (en) | 1994-09-30 | 2005-12-30 | Qualcomm Inc | Multipath search processor for a spread spectrum multiple access communication system |
US5790080A (en) | 1995-02-17 | 1998-08-04 | Lockheed Sanders, Inc. | Meander line loaded antenna |
DE19519450C2 (en) | 1995-05-26 | 1997-06-12 | Oliver Simons | Control system |
JP3761001B2 (en) | 1995-11-20 | 2006-03-29 | ソニー株式会社 | Contactless information card and IC |
SE506626C2 (en) | 1995-11-27 | 1998-01-19 | Ericsson Telefon Ab L M | impedance |
US5956626A (en) | 1996-06-03 | 1999-09-21 | Motorola, Inc. | Wireless communication device having an electromagnetic wave proximity sensor |
JP3392016B2 (en) | 1996-09-13 | 2003-03-31 | 株式会社日立製作所 | Power transmission system and power transmission and information communication system |
SG54559A1 (en) | 1996-09-13 | 1998-11-16 | Hitachi Ltd | Power transmission system ic card and information communication system using ic card |
JPH1090405A (en) | 1996-09-19 | 1998-04-10 | Toshiba Corp | Information processor |
FI106759B (en) | 1996-11-13 | 2001-03-30 | Nokia Mobile Phones Ltd | Mobile transmit power limiting system |
JPH10187916A (en) | 1996-12-27 | 1998-07-21 | Rohm Co Ltd | Responder for contactless ic card communication system |
US5805067A (en) | 1996-12-30 | 1998-09-08 | At&T Corp | Communication terminal having detector method and apparatus for safe wireless communication |
JPH10210751A (en) | 1997-01-22 | 1998-08-07 | Hitachi Ltd | Rectifying circuit and semiconductor integrated circuit and ic card |
US5933421A (en) | 1997-02-06 | 1999-08-03 | At&T Wireless Services Inc. | Method for frequency division duplex communications |
DE29710675U1 (en) | 1997-06-16 | 1997-08-14 | Tegethoff Marius | Display system for vehicles |
JPH10240880A (en) | 1997-02-26 | 1998-09-11 | Rohm Co Ltd | Ic card system and carriage system using the same |
JPH10295043A (en) | 1997-04-16 | 1998-11-04 | Fujiden Enji Kk | Power supply for portable electronic apparatus |
US6164532A (en) | 1997-05-15 | 2000-12-26 | Hitachi, Ltd. | Power transmission system, power transmission/communication system and reader and/or writer |
US5963144A (en) | 1997-05-30 | 1999-10-05 | Single Chip Systems Corp. | Cloaking circuit for use in a radiofrequency identification and method of cloaking RFID tags to increase interrogation reliability |
DE69838364T2 (en) | 1997-06-20 | 2008-05-29 | Hitachi Kokusai Electric Inc. | Read / write device, power supply system and communication system |
US6151500A (en) | 1997-06-20 | 2000-11-21 | Bellsouth Corporation | Method and apparatus for directing a wireless communication to a wireline unit |
JPH1125238A (en) | 1997-07-04 | 1999-01-29 | Kokusai Electric Co Ltd | Ic card |
US6025780A (en) | 1997-07-25 | 2000-02-15 | Checkpoint Systems, Inc. | RFID tags which are virtually activated and/or deactivated and apparatus and methods of using same in an electronic security system |
JPH1169640A (en) | 1997-08-26 | 1999-03-09 | Matsushita Electric Works Ltd | Non-contact charging device |
JPH1198706A (en) | 1997-09-18 | 1999-04-09 | Tokin Corp | Non-contact charger |
JPH11122832A (en) | 1997-10-07 | 1999-04-30 | Casio Comput Co Ltd | Charger |
JP4009688B2 (en) | 1997-10-31 | 2007-11-21 | 竹中エンジニアリング株式会社 | Object detector with wireless power supply |
JP3840765B2 (en) | 1997-11-21 | 2006-11-01 | 神鋼電機株式会社 | Primary power supply side power supply device for contactless power transfer system |
JPH11188113A (en) | 1997-12-26 | 1999-07-13 | Nec Corp | Power transmission system, power transmission method and electric stimulation device provided with the power transmission system |
JP3881770B2 (en) | 1998-03-10 | 2007-02-14 | 松下電器産業株式会社 | Mobile station apparatus and communication method |
US6570541B2 (en) | 1998-05-18 | 2003-05-27 | Db Tag, Inc. | Systems and methods for wirelessly projecting power using multiple in-phase current loops |
JP3264266B2 (en) | 1998-06-04 | 2002-03-11 | 三菱マテリアル株式会社 | Anti-theft tag and method of using the same |
US6047214A (en) | 1998-06-09 | 2000-04-04 | North Carolina State University | System and method for powering, controlling, and communicating with multiple inductively-powered devices |
TW412896B (en) | 1998-07-28 | 2000-11-21 | Koninkl Philips Electronics Nv | Communication apparatus, mobile radio equipment, base station and power control method |
JP4099807B2 (en) | 1998-08-03 | 2008-06-11 | 詩朗 杉村 | IC card power supply device |
JP2000067195A (en) | 1998-08-26 | 2000-03-03 | Sony Corp | Information card |
JP2000113127A (en) | 1998-09-30 | 2000-04-21 | Toshiba Corp | Wireless tag system |
US6072383A (en) | 1998-11-04 | 2000-06-06 | Checkpoint Systems, Inc. | RFID tag having parallel resonant circuit for magnetically decoupling tag from its environment |
JP2000172795A (en) | 1998-12-07 | 2000-06-23 | Kokusai Electric Co Ltd | Reader/writer |
DE19858299A1 (en) | 1998-12-17 | 2000-06-29 | Daimler Chrysler Ag | Antenna system for a data communication device in a vehicle |
US6666875B1 (en) | 1999-03-05 | 2003-12-23 | Olympus Optical Co., Ltd. | Surgical apparatus permitting recharge of battery-driven surgical instrument in noncontact state |
FR2793360A1 (en) | 1999-05-04 | 2000-11-10 | Cie Des Signaux | RADIUS POWER CONTROL OF AN INTEGRATED PROXIMITY CIRCUIT CARD READER |
EP1190543A4 (en) | 1999-06-01 | 2003-05-28 | Peter Monsen | Multiple access system and method for multibeam digital radio systems |
US7212414B2 (en) | 1999-06-21 | 2007-05-01 | Access Business Group International, Llc | Adaptive inductive power supply |
US7522878B2 (en) | 1999-06-21 | 2009-04-21 | Access Business Group International Llc | Adaptive inductive power supply with communication |
US7005985B1 (en) | 1999-07-20 | 2006-02-28 | Axcess, Inc. | Radio frequency identification system and method |
DE19958265A1 (en) | 1999-12-05 | 2001-06-21 | Iq Mobil Electronics Gmbh | Wireless energy transmission system with increased output voltage |
US7478108B2 (en) | 1999-12-06 | 2009-01-13 | Micro Strain, Inc. | Data collection using sensing units and separate control units with all power derived from the control units |
JP3488166B2 (en) | 2000-02-24 | 2004-01-19 | 日本電信電話株式会社 | Contactless IC card system, its reader / writer and contactless IC card |
US20020154705A1 (en) | 2000-03-22 | 2002-10-24 | Walton Jay R. | High efficiency high performance communications system employing multi-carrier modulation |
JP4522532B2 (en) | 2000-04-07 | 2010-08-11 | 日本信号株式会社 | Non-contact IC card |
JP4240748B2 (en) | 2000-04-25 | 2009-03-18 | パナソニック電工株式会社 | Contactless power supply device |
US7248841B2 (en) | 2000-06-13 | 2007-07-24 | Agee Brian G | Method and apparatus for optimization of wireless multipoint electromagnetic communication networks |
JP3631112B2 (en) | 2000-07-14 | 2005-03-23 | 三洋電機株式会社 | Non-contact charging device and mobile phone |
JP2002050534A (en) | 2000-08-04 | 2002-02-15 | Taiyo Yuden Co Ltd | Electronic component |
US6392544B1 (en) | 2000-09-25 | 2002-05-21 | Motorola, Inc. | Method and apparatus for selectively activating radio frequency identification tags that are in close proximity |
KR100355270B1 (en) | 2000-10-11 | 2002-10-11 | 한국전자통신연구원 | Finger using Time Division Method and RAKE Receiver having Finger |
KR100566220B1 (en) | 2001-01-05 | 2006-03-29 | 삼성전자주식회사 | Contactless battery charger |
US6690264B2 (en) | 2001-01-23 | 2004-02-10 | Single Chip Systems Corporation | Selective cloaking circuit for use in a radiofrequency identification and method of cloaking RFID tags |
JP4784794B2 (en) | 2001-01-26 | 2011-10-05 | ソニー株式会社 | Electronic equipment |
DE10104019C1 (en) | 2001-01-31 | 2002-01-31 | Bosch Gmbh Robert | Motor cycle protective suit with airbag(s) has connection arrangement to trigger device on motor cycle formed by coil(s) for acquiring energy and data transmission radio terminal(s) |
US7142811B2 (en) | 2001-03-16 | 2006-11-28 | Aura Communications Technology, Inc. | Wireless communication over a transducer device |
US6600931B2 (en) | 2001-03-30 | 2003-07-29 | Nokia Corporation | Antenna switch assembly, and associated method, for a radio communication station |
JP2003011734A (en) | 2001-04-26 | 2003-01-15 | Denso Corp | Mounting structure of electrical apparatus for vehicle |
JP3905418B2 (en) | 2001-05-18 | 2007-04-18 | セイコーインスツル株式会社 | Power supply device and electronic device |
US6970142B1 (en) | 2001-08-16 | 2005-11-29 | Raytheon Company | Antenna configurations for reduced radar complexity |
TW535341B (en) | 2001-09-07 | 2003-06-01 | Primax Electronics Ltd | Wireless peripherals charged by electromagnetic induction |
US6489745B1 (en) | 2001-09-13 | 2002-12-03 | The Boeing Company | Contactless power supply |
US7039435B2 (en) | 2001-09-28 | 2006-05-02 | Agere Systems Inc. | Proximity regulation system for use with a portable cell phone and a method of operation thereof |
US7146139B2 (en) | 2001-09-28 | 2006-12-05 | Siemens Communications, Inc. | System and method for reducing SAR values |
DE60235847D1 (en) | 2001-11-20 | 2010-05-12 | Qualcomm Inc | Reverse link power controlled amplifier unit |
CN1220339C (en) | 2001-12-12 | 2005-09-21 | 天瀚科技股份有限公司 | Radio electromagnetic pressure induction system |
US6954449B2 (en) | 2002-01-10 | 2005-10-11 | Harris Corporation | Method and device for establishing communication links and providing reliable confirm messages in a communication system |
US7304972B2 (en) | 2002-01-10 | 2007-12-04 | Harris Corporation | Method and device for establishing communication links and handling unbalanced traffic loads in a communication system |
JP3932906B2 (en) | 2002-01-23 | 2007-06-20 | 日本電気株式会社 | Base station apparatus and mobile communication system using the same |
JP2003224937A (en) | 2002-01-25 | 2003-08-08 | Sony Corp | Method and apparatus for power supply, method and apparatus for receiving power supply, power supply system, recording medium, and program |
US6777829B2 (en) | 2002-03-13 | 2004-08-17 | Celis Semiconductor Corporation | Rectifier utilizing a grounded antenna |
US7565108B2 (en) | 2002-03-26 | 2009-07-21 | Nokia Corporation | Radio frequency identification (RF-ID) based discovery for short range radio communication with reader device having transponder functionality |
JP3719510B2 (en) | 2002-04-08 | 2005-11-24 | アルプス電気株式会社 | Storage room with contactless charger |
US6906495B2 (en) | 2002-05-13 | 2005-06-14 | Splashpower Limited | Contact-less power transfer |
GB2388716B (en) | 2002-05-13 | 2004-10-20 | Splashpower Ltd | Improvements relating to contact-less power transfer |
EP1547222B1 (en) | 2002-06-10 | 2018-10-03 | City University of Hong Kong | Planar inductive battery charger |
US20040002835A1 (en) | 2002-06-26 | 2004-01-01 | Nelson Matthew A. | Wireless, battery-less, asset sensor and communication system: apparatus and method |
US7428438B2 (en) | 2002-06-28 | 2008-09-23 | Boston Scientific Neuromodulation Corporation | Systems and methods for providing power to a battery in an implantable stimulator |
US7069086B2 (en) | 2002-08-08 | 2006-06-27 | Cardiac Pacemakers, Inc. | Method and system for improved spectral efficiency of far field telemetry in a medical device |
JP2004096589A (en) | 2002-09-03 | 2004-03-25 | General Res Of Electronics Inc | Tuning circuit |
KR20040074985A (en) | 2002-09-12 | 2004-08-26 | 미쓰비시덴키 가부시키가이샤 | Receiving device, display device, power supply system, display system, and receiving method |
US7019617B2 (en) | 2002-10-02 | 2006-03-28 | Battelle Memorial Institute | Radio frequency identification devices, backscatter communication device wake-up methods, communication device wake-up methods and a radio frequency identification device wake-up method |
JP3821083B2 (en) | 2002-10-11 | 2006-09-13 | 株式会社デンソー | Electronics |
JP4089778B2 (en) | 2002-11-07 | 2008-05-28 | 株式会社アイデンビデオトロニクス | Energy supply equipment |
FR2847089B1 (en) | 2002-11-12 | 2005-02-04 | Inside Technologies | TUNABLE ANTENNA CIRCUIT, IN PARTICULAR FOR NON-CONTACT INTEGRATED CIRCUIT READER |
GB2395627B (en) | 2002-11-21 | 2006-05-10 | Hewlett Packard Co | Detector |
US20090072782A1 (en) | 2002-12-10 | 2009-03-19 | Mitch Randall | Versatile apparatus and method for electronic devices |
GB0229141D0 (en) | 2002-12-16 | 2003-01-15 | Splashpower Ltd | Improvements relating to contact-less power transfer |
US7480907B1 (en) | 2003-01-09 | 2009-01-20 | Hewlett-Packard Development Company, L.P. | Mobile services network for update of firmware/software in mobile handsets |
US8183827B2 (en) | 2003-01-28 | 2012-05-22 | Hewlett-Packard Development Company, L.P. | Adaptive charger system and method |
US6948505B2 (en) | 2003-02-10 | 2005-09-27 | Armen Karapetyan | Cleaning apparatus for medical and/or dental tool |
BRPI0407606A (en) | 2003-02-19 | 2006-02-21 | Flarion Technologies Inc | improved coding methods and apparatus in multi-user communication systems |
EP1454769A1 (en) | 2003-03-03 | 2004-09-08 | Sokymat Identifikations Komponenten GmbH | Apparatus for inductively transmitting signals between a transponder circuit and an interrogating circuit |
US20040180637A1 (en) | 2003-03-11 | 2004-09-16 | Nobuyuki Nagai | Wireless communication IC and wireless communication information storage medium using the same |
JP2004297779A (en) | 2003-03-11 | 2004-10-21 | Hitachi Maxell Ltd | Radio communications ic and radio communication information storage medium using the same |
JP2004274972A (en) | 2003-03-12 | 2004-09-30 | Toshiba Corp | Cable-less power supply apparatus |
EP1609296B1 (en) | 2003-03-28 | 2008-11-26 | Telefonaktiebolaget LM Ericsson (publ) | Method and apparatus for calculating whether power level is sufficient for data transfer |
JP4337383B2 (en) | 2003-04-10 | 2009-09-30 | セイコーエプソン株式会社 | Equipment capable of mounting consumable containers |
FI115264B (en) | 2003-04-17 | 2005-03-31 | Ailocom Oy | Wireless power transmission |
EP1618830A4 (en) | 2003-04-25 | 2010-06-23 | Olympus Corp | Radio-type in-subject information acquisition system and outside-subject device |
AU2004241915A1 (en) | 2003-05-23 | 2004-12-02 | Auckland Uniservices Limited | Methods and apparatus for control of inductively coupled power transfer systems |
JP4172327B2 (en) | 2003-05-28 | 2008-10-29 | 松下電器産業株式会社 | Non-contact IC card read / write device and adjustment method thereof |
US6967462B1 (en) | 2003-06-05 | 2005-11-22 | Nasa Glenn Research Center | Charging of devices by microwave power beaming |
US7613497B2 (en) | 2003-07-29 | 2009-11-03 | Biosense Webster, Inc. | Energy transfer amplification for intrabody devices |
TW200512964A (en) | 2003-09-26 | 2005-04-01 | Tse-Choun Chou | Wireless microwave charge module |
JP2005110412A (en) | 2003-09-30 | 2005-04-21 | Sharp Corp | Power supply system |
JP3686067B2 (en) | 2003-10-28 | 2005-08-24 | Tdk株式会社 | Method for manufacturing magnetic recording medium |
KR20070032271A (en) | 2003-11-25 | 2007-03-21 | 스타키 러보러토리즈 인코포레이티드 | Enhanced magnetic field communication system |
JP2005159607A (en) | 2003-11-25 | 2005-06-16 | Matsushita Electric Ind Co Ltd | Portable communication apparatus |
US6940466B2 (en) | 2003-11-25 | 2005-09-06 | Starkey Laboratories, Inc. | Enhanced magnetic field communication system |
US7515881B2 (en) | 2003-11-26 | 2009-04-07 | Starkey Laboratories, Inc. | Resonance frequency shift canceling in wireless hearing aids |
JP4457727B2 (en) | 2003-11-27 | 2010-04-28 | セイコーエプソン株式会社 | Non-contact identification tag, data communication system, and non-contact identification tag control program |
US7375492B2 (en) | 2003-12-12 | 2008-05-20 | Microsoft Corporation | Inductively charged battery pack |
US7378817B2 (en) | 2003-12-12 | 2008-05-27 | Microsoft Corporation | Inductive power adapter |
US7356588B2 (en) | 2003-12-16 | 2008-04-08 | Linear Technology Corporation | Circuits and methods for detecting the presence of a powered device in a powered network |
JP4536496B2 (en) | 2003-12-19 | 2010-09-01 | 株式会社半導体エネルギー研究所 | Semiconductor device and driving method of semiconductor device |
US20050151511A1 (en) | 2004-01-14 | 2005-07-14 | Intel Corporation | Transferring power between devices in a personal area network |
JP2005208754A (en) | 2004-01-20 | 2005-08-04 | Matsushita Electric Ind Co Ltd | Non-contact ic card communication equipment |
JP2005218021A (en) | 2004-02-02 | 2005-08-11 | Fujitsu Frontech Ltd | Small loop antenna for inductive reader/writer |
JP2005224045A (en) | 2004-02-06 | 2005-08-18 | Mitsubishi Heavy Ind Ltd | Non-contact power feeding device and wire-less system provided with it |
JP3777577B2 (en) | 2004-02-12 | 2006-05-24 | 関西ティー・エル・オー株式会社 | Wireless power supply system for portable IT equipment |
CN2681368Y (en) | 2004-03-16 | 2005-02-23 | 周彬 | A pad pasting for wireless rechargeable battery |
DE102004013177B4 (en) | 2004-03-17 | 2006-05-18 | Infineon Technologies Ag | Data transmission unit with a data transmission interface and a method for operating the data transmission unit |
US7132946B2 (en) | 2004-04-08 | 2006-11-07 | 3M Innovative Properties Company | Variable frequency radio frequency identification (RFID) tags |
JP4578139B2 (en) | 2004-04-13 | 2010-11-10 | 富士通株式会社 | Information processing apparatus, program, storage medium, and method for receiving predetermined information |
US20050239018A1 (en) | 2004-04-27 | 2005-10-27 | Scott Green | Intraoral bite spacer and illumination apparatus |
DE602005005983T2 (en) | 2004-04-28 | 2009-06-10 | Checkpoint Systems, Inc. | ELECTRONIC ARTICLE TRACKING SYSTEM FOR A PURCHASE SHELF WITH A GRINDING ANTENNA |
GB2414121B (en) | 2004-05-11 | 2008-04-02 | Splashpower Ltd | Controlling inductive power transfer systems |
GB2414120B (en) | 2004-05-11 | 2008-04-02 | Splashpower Ltd | Controlling inductive power transfer systems |
US7180403B2 (en) | 2004-05-18 | 2007-02-20 | Assa Abloy Identification Technology Group Ab | RFID reader utilizing an analog to digital converter for data acquisition and power monitoring functions |
KR20050120874A (en) | 2004-06-21 | 2005-12-26 | 주식회사 아트랑 | Mobile charger |
US20060028176A1 (en) | 2004-07-22 | 2006-02-09 | Qingfeng Tang | Cellular telephone battery recharging apparatus |
KR20040072581A (en) | 2004-07-29 | 2004-08-18 | (주)제이씨 프로텍 | An amplification relay device of electromagnetic wave and a radio electric power conversion apparatus using the above device |
JP2006060909A (en) | 2004-08-19 | 2006-03-02 | Seiko Epson Corp | Noncontact power transmitter |
US7382260B2 (en) | 2004-09-01 | 2008-06-03 | Microsoft Corporation | Hot swap and plug-and-play for RFID devices |
NZ535390A (en) | 2004-09-16 | 2007-10-26 | Auckland Uniservices Ltd | Inductively powered mobile sensor system |
US7274913B2 (en) | 2004-10-15 | 2007-09-25 | Broadcom Corporation | Transceiver system and method of using same |
JP2006141170A (en) | 2004-11-15 | 2006-06-01 | Sharp Corp | Power supply system and transmission device and receiving device for use in the system |
JP4639773B2 (en) | 2004-11-24 | 2011-02-23 | 富士電機ホールディングス株式会社 | Non-contact power feeding device |
JP4779342B2 (en) | 2004-11-25 | 2011-09-28 | パナソニック電工株式会社 | Wireless sensor device |
TW200617792A (en) | 2004-11-26 | 2006-06-01 | Ind Tech Res Inst | Method and device applying RFID system tag to serve as local card reader and for power detection |
US7443057B2 (en) | 2004-11-29 | 2008-10-28 | Patrick Nunally | Remote power charging of electronic devices |
US8295940B2 (en) | 2004-12-17 | 2012-10-23 | De Puy Products, Inc. | System for recharging medical instruments |
JP4525331B2 (en) | 2004-12-20 | 2010-08-18 | 日産自動車株式会社 | Microwave power transmission system for vehicle and microwave power transmission device for vehicle |
KR100695328B1 (en) | 2004-12-21 | 2007-03-15 | 한국전자통신연구원 | Ultra Isolation Antennas |
JP2006201959A (en) | 2005-01-19 | 2006-08-03 | Fuji Photo Film Co Ltd | Print system, print terminal device, image storage system and image storage device |
GB0501115D0 (en) | 2005-01-19 | 2005-02-23 | Innovision Res & Tech Plc | Combined power coupling and rf communication apparatus |
US7646343B2 (en) | 2005-06-24 | 2010-01-12 | Ruckus Wireless, Inc. | Multiple-input multiple-output wireless antennas |
JP2006229583A (en) | 2005-02-17 | 2006-08-31 | Eastman Kodak Co | Communication system and digital camera and dock apparatus |
CN1829037A (en) | 2005-03-03 | 2006-09-06 | 陈居阳 | Battery device with wireless charging system and its method |
US20060197652A1 (en) | 2005-03-04 | 2006-09-07 | International Business Machines Corporation | Method and system for proximity tracking-based adaptive power control of radio frequency identification (RFID) interrogators |
JP2006254678A (en) | 2005-03-07 | 2006-09-21 | Wise Media Technology Inc | Power charge box for rfid transponder |
US7262700B2 (en) | 2005-03-10 | 2007-08-28 | Microsoft Corporation | Inductive powering surface for powering portable devices |
JP2006295905A (en) | 2005-03-16 | 2006-10-26 | Semiconductor Energy Lab Co Ltd | Information processing apparatus |
US7786863B2 (en) | 2005-03-16 | 2010-08-31 | Semiconductor Energy Laboratory Co., Ltd. | Information processing and wireless communication device wherein the resonant frequency of an antenna circuit is regularly corrected regardless of temperature |
JP4602808B2 (en) | 2005-03-18 | 2010-12-22 | 富士通株式会社 | Antenna selector |
CN100416601C (en) | 2005-03-21 | 2008-09-03 | 财团法人工业技术研究院 | Pushcart using radio frequency identification technology |
CN1808473A (en) | 2005-03-28 | 2006-07-26 | 上海中策工贸有限公司 | Wireless label electronic paper traffic sign |
JP2006296123A (en) | 2005-04-13 | 2006-10-26 | Yaskawa Electric Corp | Noncontact power supply system and power transmission method |
US20070072474A1 (en) | 2005-04-27 | 2007-03-29 | Nigel Beasley | Flexible power adapter systems and methods |
US8111143B2 (en) | 2005-04-29 | 2012-02-07 | Hewlett-Packard Development Company, L.P. | Assembly for monitoring an environment |
JP2006314181A (en) | 2005-05-09 | 2006-11-16 | Sony Corp | Non-contact charger, non-contact charging system, and non-contact charging method |
ZA200709820B (en) | 2005-05-24 | 2009-04-29 | Powercast Corp | Power transmission network |
CN1881733A (en) | 2005-06-17 | 2006-12-20 | 乐金电子(沈阳)有限公司 | Wireless remote controller charging system |
JP2007006029A (en) | 2005-06-22 | 2007-01-11 | Sony Corp | Electronic equipment with built-in rfid |
CA2511051A1 (en) | 2005-06-28 | 2006-12-29 | Roger J. Soar | Contactless battery charging apparel |
US8830035B2 (en) | 2005-06-30 | 2014-09-09 | Farpointe Data, Inc. | Power consumption management for an RFID reader |
AU2006269374C1 (en) | 2005-07-12 | 2010-03-25 | Massachusetts Institute Of Technology | Wireless non-radiative energy transfer |
SE529375C2 (en) | 2005-07-22 | 2007-07-24 | Sandvik Intellectual Property | Device for improved plasma activity in PVD reactors |
US20070021140A1 (en) | 2005-07-22 | 2007-01-25 | Keyes Marion A Iv | Wireless power transmission systems and methods |
US7495414B2 (en) | 2005-07-25 | 2009-02-24 | Convenient Power Limited | Rechargeable battery circuit and structure for compatibility with a planar inductive charging platform |
US7720439B2 (en) | 2005-07-28 | 2010-05-18 | D-Link Systems, Inc. | Wireless media device cradle |
KR100792311B1 (en) | 2005-07-30 | 2008-01-07 | 엘에스전선 주식회사 | Rechargeable power supply, rechargeable device, battery device, contactless recharger system and method for charging rechargeable battery cell |
JP2007043773A (en) | 2005-08-01 | 2007-02-15 | Nissan Motor Co Ltd | Device and method for monitoring/controlling leakes of microwaves |
KR100691255B1 (en) | 2005-08-08 | 2007-03-12 | (주)제이씨 프로텍 | A Small and Light Wireless Power Transmitting and Receiving Device |
JP2007089279A (en) | 2005-09-21 | 2007-04-05 | Asyst Shinko Inc | Noncontact feeder system |
WO2007034543A1 (en) | 2005-09-21 | 2007-03-29 | Matsushita Electric Industrial Co., Ltd. | Tag reading device |
CN1941541A (en) | 2005-09-29 | 2007-04-04 | 英华达(上海)电子有限公司 | Wireless charger of manual device |
WO2007044144A2 (en) | 2005-10-04 | 2007-04-19 | Atmel Corporation | A means to deactivate a contactless device |
US20070080804A1 (en) | 2005-10-07 | 2007-04-12 | Edwin Hirahara | Systems and methods for enhanced RFID tag performance |
JP2007104868A (en) | 2005-10-07 | 2007-04-19 | Toyota Motor Corp | Charging apparatus for vehicle, electric equipment, and non-contact charging system for vehicle |
US7193578B1 (en) | 2005-10-07 | 2007-03-20 | Lockhead Martin Corporation | Horn antenna array and methods for fabrication thereof |
US7382636B2 (en) | 2005-10-14 | 2008-06-03 | Access Business Group International Llc | System and method for powering a load |
US7592961B2 (en) | 2005-10-21 | 2009-09-22 | Sanimina-Sci Corporation | Self-tuning radio frequency identification antenna system |
US7642918B2 (en) | 2005-10-21 | 2010-01-05 | Georgia Tech Research Corporation | Thin flexible radio frequency identification tags and subsystems thereof |
KR100768510B1 (en) | 2005-10-24 | 2007-10-18 | 한국전자통신연구원 | Apparatus for effectively transmitting in Orthogonal Frequency Division Multiple Access using multiple antenna and method thereof |
KR100717877B1 (en) | 2005-11-03 | 2007-05-14 | 한국전자통신연구원 | Tag Number Estimation Method in Sloted Aloha based RFID Systems |
KR100811880B1 (en) | 2005-12-07 | 2008-03-10 | 한국전자통신연구원 | Multi rfid reader system and method for controling multi rfid reader in multi rfid reader system |
JP2007166379A (en) | 2005-12-15 | 2007-06-28 | Fujitsu Ltd | Loop antenna and electronic apparatus with same |
US7521890B2 (en) | 2005-12-27 | 2009-04-21 | Power Science Inc. | System and method for selective transfer of radio frequency power |
TWM294779U (en) | 2006-01-06 | 2006-07-21 | Wen-Sung Li | Portable charging device of mobile phone |
CN101371541A (en) | 2006-01-11 | 2009-02-18 | 鲍尔卡斯特公司 | Pulse transmission method |
KR100752650B1 (en) | 2006-01-13 | 2007-08-29 | 삼성전자주식회사 | Tri-state output driver arranging method and semiconductor memory device using the same |
EP1992077B1 (en) | 2006-01-18 | 2018-03-21 | QUALCOMM Incorporated | Method and apparatus for delivering energy to an electrical or electronic device via a wireless link |
US9130602B2 (en) | 2006-01-18 | 2015-09-08 | Qualcomm Incorporated | Method and apparatus for delivering energy to an electrical or electronic device via a wireless link |
US7952322B2 (en) | 2006-01-31 | 2011-05-31 | Mojo Mobility, Inc. | Inductive power source and charging system |
US8169185B2 (en) | 2006-01-31 | 2012-05-01 | Mojo Mobility, Inc. | System and method for inductive charging of portable devices |
WO2007095267A2 (en) | 2006-02-13 | 2007-08-23 | Powercast Corporation | Implementation of an rf power transmitter and network |
US20080261519A1 (en) | 2006-03-16 | 2008-10-23 | Cellynx, Inc. | Dual cancellation loop wireless repeater |
EP1997232A4 (en) | 2006-03-22 | 2010-03-17 | Powercast Corp | Method and apparatus for implementation of a wireless power supply |
US7576657B2 (en) | 2006-03-22 | 2009-08-18 | Symbol Technologies, Inc. | Single frequency low power RFID device |
JP4759053B2 (en) | 2006-05-31 | 2011-08-31 | 株式会社日立製作所 | Non-contact type electronic device and semiconductor integrated circuit device mounted thereon |
US7948208B2 (en) | 2006-06-01 | 2011-05-24 | Mojo Mobility, Inc. | Power source, charging system, and inductive receiver for mobile devices |
US7826873B2 (en) | 2006-06-08 | 2010-11-02 | Flextronics Ap, Llc | Contactless energy transmission converter |
US20070290654A1 (en) | 2006-06-14 | 2007-12-20 | Assaf Govari | Inductive charging of tools on surgical tray |
US7561050B2 (en) | 2006-06-28 | 2009-07-14 | International Business Machines Corporation | System and method to automate placement of RFID repeaters |
WO2008011769A1 (en) | 2006-07-21 | 2008-01-31 | Zhenyou Huang | Fire fighting pump and operation thereof and fire fighting system and fire engine |
US20080030324A1 (en) | 2006-07-31 | 2008-02-07 | Symbol Technologies, Inc. | Data communication with sensors using a radio frequency identification (RFID) protocol |
JP4769666B2 (en) | 2006-08-30 | 2011-09-07 | 京セラ株式会社 | Wireless communication method and wireless communication terminal |
US8463332B2 (en) | 2006-08-31 | 2013-06-11 | Semiconductor Energy Laboratory Co., Ltd. | Wireless communication device |
US7764046B2 (en) | 2006-08-31 | 2010-07-27 | Semiconductor Energy Laboratory Co., Ltd. | Power storage device and semiconductor device provided with the power storage device |
US8159090B2 (en) | 2006-09-01 | 2012-04-17 | Powercast Corporation | Hybrid power harvesting and method |
WO2008026080A2 (en) | 2006-09-01 | 2008-03-06 | Bio Aim Technologies Holding Ltd. | Systems and methods for wireless power transfer |
US7538666B2 (en) | 2006-09-06 | 2009-05-26 | Grace Industries, Inc. | Automated accountability locating system |
US9129741B2 (en) | 2006-09-14 | 2015-09-08 | Qualcomm Incorporated | Method and apparatus for wireless power transmission |
US7658247B2 (en) | 2006-09-20 | 2010-02-09 | Gatekeeper Systems, Inc. | Systems and methods for power storage and management from intermittent power sources |
JP5147345B2 (en) | 2006-09-29 | 2013-02-20 | 株式会社半導体エネルギー研究所 | Semiconductor device |
US7839124B2 (en) | 2006-09-29 | 2010-11-23 | Semiconductor Energy Laboratory Co., Ltd. | Wireless power storage device comprising battery, semiconductor device including battery, and method for operating the wireless power storage device |
US7539465B2 (en) | 2006-10-16 | 2009-05-26 | Assa Abloy Ab | Tuning an RFID reader with electronic switches |
US7626544B2 (en) | 2006-10-17 | 2009-12-01 | Ut-Battelle, Llc | Robust low-frequency spread-spectrum navigation system |
US8068984B2 (en) | 2006-10-17 | 2011-11-29 | Ut-Battelle, Llc | Triply redundant integrated navigation and asset visibility system |
JP2008104295A (en) | 2006-10-19 | 2008-05-01 | Voltex:Kk | Non-contact power supply unit |
KR100836634B1 (en) | 2006-10-24 | 2008-06-10 | 주식회사 한림포스텍 | Non-contact charger available of wireless data and power transmission, charging battery-pack and mobile divice using non-contact charger |
RU2009119727A (en) | 2006-10-26 | 2010-12-10 | Конинклейке Филипс Электроникс Н.В. (Nl) | INDUCTIVE POWER SYSTEM AND METHOD OF ITS WORK |
WO2008050292A2 (en) | 2006-10-26 | 2008-05-02 | Koninklijke Philips Electronics N.V. | Floor covering and inductive power system |
US9295444B2 (en) | 2006-11-10 | 2016-03-29 | Siemens Medical Solutions Usa, Inc. | Transducer array imaging system |
JP4691000B2 (en) | 2006-11-15 | 2011-06-01 | 三菱重工業株式会社 | Non-contact power feeding device for moving objects |
TW200824215A (en) | 2006-11-23 | 2008-06-01 | Univ Nat Central | A non-contact type power supply device having load and interval detection |
US8099140B2 (en) | 2006-11-24 | 2012-01-17 | Semiconductor Energy Laboratory Co., Ltd. | Wireless power supply system and wireless power supply method |
JP4650407B2 (en) | 2006-12-12 | 2011-03-16 | ソニー株式会社 | Wireless processing system, wireless processing method, and wireless electronic device |
CN100458841C (en) | 2006-12-28 | 2009-02-04 | 复旦大学 | Semi-active RFID tag supporting wireless charging |
US20080157711A1 (en) | 2007-01-03 | 2008-07-03 | Kuo Ching Chiang | Portable device charging module |
JP2008178195A (en) | 2007-01-17 | 2008-07-31 | Seiko Epson Corp | Power transmission controller, power receiving controller, contactless power transmission system, power transmitter, power receiver, and electronic apparatus |
US8143844B2 (en) | 2007-01-19 | 2012-03-27 | Semiconductor Energy Laboratory Co., Ltd. | Charging device |
US8629577B2 (en) | 2007-01-29 | 2014-01-14 | Powermat Technologies, Ltd | Pinless power coupling |
TWM317367U (en) | 2007-01-30 | 2007-08-21 | Hsin Chong Machinery Works Co | Wireless power transmitting and receiving apparatus for use in cars |
JP2008199857A (en) | 2007-02-15 | 2008-08-28 | Fujifilm Corp | Rectenna device |
JP4525747B2 (en) | 2007-02-20 | 2010-08-18 | セイコーエプソン株式会社 | Power transmission control device, power transmission device, electronic device, and non-contact power transmission system |
US7772802B2 (en) | 2007-03-01 | 2010-08-10 | Eastman Kodak Company | Charging display system |
US7793121B2 (en) | 2007-03-01 | 2010-09-07 | Eastman Kodak Company | Charging display system |
US9774086B2 (en) | 2007-03-02 | 2017-09-26 | Qualcomm Incorporated | Wireless power apparatus and methods |
JP4379480B2 (en) | 2007-03-09 | 2009-12-09 | ソニー株式会社 | Charger and charging method |
US8095166B2 (en) | 2007-03-26 | 2012-01-10 | Qualcomm Incorporated | Digital and analog power control for an OFDMA/CDMA access terminal |
US8351447B2 (en) | 2007-04-20 | 2013-01-08 | Sony Corporation | Data communication system, cradle apparatus, server apparatus, data communication method and data communication program |
JP5151632B2 (en) | 2007-04-20 | 2013-02-27 | ソニー株式会社 | Data communication system, server device, portable electronic device, cradle device, home device, data communication method and program |
CN201044047Y (en) | 2007-05-09 | 2008-04-02 | 贺伟 | Watch capable of wireless charge |
WO2008147506A1 (en) | 2007-05-22 | 2008-12-04 | Powerwave Technologies, Inc. | On frequency repeater with agc stability determination |
JP5110966B2 (en) | 2007-05-24 | 2012-12-26 | ソニーモバイルコミュニケーションズ株式会社 | Non-contact charging device and non-contact power transmission system |
US8805530B2 (en) | 2007-06-01 | 2014-08-12 | Witricity Corporation | Power generation for implantable devices |
US9124120B2 (en) | 2007-06-11 | 2015-09-01 | Qualcomm Incorporated | Wireless power system and proximity effects |
US7812481B2 (en) | 2007-06-29 | 2010-10-12 | Seiko Epson Corporation | Power transmission control device, power transmission device, electronic instrument, and non-contact power transmission system |
US9634730B2 (en) | 2007-07-09 | 2017-04-25 | Qualcomm Incorporated | Wireless energy transfer using coupled antennas |
CN101123318A (en) | 2007-08-02 | 2008-02-13 | 深圳市杰特电信控股有限公司 | A wireless charging mobile phone, charging device and its charging method |
WO2009023646A2 (en) | 2007-08-13 | 2009-02-19 | Nigelpower, Llc | Long range low frequency resonator and materials |
US7609157B2 (en) | 2007-08-20 | 2009-10-27 | Radio Systems Corporation | Antenna proximity determining system utilizing bit error rate |
GB0716679D0 (en) | 2007-08-28 | 2007-10-03 | Fells J | Inductive power supply |
US9048945B2 (en) | 2007-08-31 | 2015-06-02 | Intel Corporation | Antenna training and tracking protocol |
JP4727636B2 (en) * | 2007-09-13 | 2011-07-20 | トヨタ自動車株式会社 | VEHICLE CHARGE CONTROL DEVICE AND VEHICLE |
US20090075704A1 (en) | 2007-09-18 | 2009-03-19 | Kevin Peichih Wang | Mobile communication device with charging module |
KR101515727B1 (en) | 2007-09-19 | 2015-04-27 | 퀄컴 인코포레이티드 | Maximizing power yield from wireless power magnetic resonators |
US7663490B2 (en) | 2007-09-28 | 2010-02-16 | Intel Corporation | Methods and apparatus for efficiently tracking activity using radio frequency identification |
JP4600462B2 (en) | 2007-11-16 | 2010-12-15 | セイコーエプソン株式会社 | Power transmission control device, power transmission device, electronic device, and non-contact power transmission system |
US8729734B2 (en) | 2007-11-16 | 2014-05-20 | Qualcomm Incorporated | Wireless power bridge |
TWI347724B (en) | 2007-11-23 | 2011-08-21 | Compal Communications Inc | Method and apparatus for wireless charging |
CN107086677A (en) | 2007-11-28 | 2017-08-22 | 高通股份有限公司 | Use the wireless power range increase of passive antenna |
TWI361540B (en) | 2007-12-14 | 2012-04-01 | Darfon Electronics Corp | Energy transferring system and method thereof |
TWI358879B (en) | 2008-01-08 | 2012-02-21 | Asustek Comp Inc | Bulti-in uninterruptible power supply system and e |
US9128687B2 (en) | 2008-01-10 | 2015-09-08 | Qualcomm Incorporated | Wireless desktop IT environment |
TWM334559U (en) | 2008-01-17 | 2008-06-11 | ming-xiang Ye | Attached wireless charger |
TWM336621U (en) | 2008-01-28 | 2008-07-11 | Tennrich Int Corp | Contactless electric charging apparatus |
US7579913B1 (en) | 2008-02-27 | 2009-08-25 | United Microelectronics Corp. | Low power comsumption, low noise and high power gain distributed amplifiers for communication systems |
US8421267B2 (en) | 2008-03-10 | 2013-04-16 | Qualcomm, Incorporated | Packaging and details of a wireless power device |
TWI366320B (en) | 2008-03-24 | 2012-06-11 | A wireless power transmission system | |
KR101589836B1 (en) | 2008-04-21 | 2016-01-28 | 퀄컴 인코포레이티드 | Short range efficient wireless power transfer |
US9130407B2 (en) | 2008-05-13 | 2015-09-08 | Qualcomm Incorporated | Signaling charging in wireless power environment |
US7893564B2 (en) | 2008-08-05 | 2011-02-22 | Broadcom Corporation | Phased array wireless resonant power delivery system |
US8248024B2 (en) | 2008-08-15 | 2012-08-21 | Microsoft Corporation | Advanced inductive charging pad for portable devices |
TWM349639U (en) | 2008-08-29 | 2009-01-21 | Airwave Technologies Inc | Wireless audio output apparatus with wireless audio receiving adaptors |
JP2012504387A (en) * | 2008-09-27 | 2012-02-16 | ウィトリシティ コーポレーション | Wireless energy transfer system |
JP5238472B2 (en) | 2008-12-16 | 2013-07-17 | 株式会社日立製作所 | Power transmission device and power reception device |
US20100201310A1 (en) | 2009-02-06 | 2010-08-12 | Broadcom Corporation | Wireless power transfer system |
US20100201311A1 (en) | 2009-02-10 | 2010-08-12 | Qualcomm Incorporated | Wireless charging with separate process |
US9312924B2 (en) | 2009-02-10 | 2016-04-12 | Qualcomm Incorporated | Systems and methods relating to multi-dimensional wireless charging |
US8854224B2 (en) | 2009-02-10 | 2014-10-07 | Qualcomm Incorporated | Conveying device information relating to wireless charging |
US20100201312A1 (en) | 2009-02-10 | 2010-08-12 | Qualcomm Incorporated | Wireless power transfer for portable enclosures |
US20100201201A1 (en) | 2009-02-10 | 2010-08-12 | Qualcomm Incorporated | Wireless power transfer in public places |
US20110057606A1 (en) | 2009-09-04 | 2011-03-10 | Nokia Corpation | Safety feature for wireless charger |
KR20110062841A (en) | 2009-12-04 | 2011-06-10 | 한국전자통신연구원 | Wireless energy transfer device |
-
2009
- 2009-10-02 US US12/572,400 patent/US8878393B2/en active Active
-
2010
- 2010-02-10 CN CN201080007410.9A patent/CN102318213B/en not_active Expired - Fee Related
- 2010-02-10 EP EP10705947A patent/EP2396900A1/en not_active Withdrawn
- 2010-02-10 JP JP2011549352A patent/JP5480300B2/en not_active Expired - Fee Related
- 2010-02-10 TW TW099104237A patent/TW201042878A/en unknown
- 2010-02-10 KR KR1020117020641A patent/KR20110114704A/en active IP Right Grant
- 2010-02-10 WO PCT/US2010/023791 patent/WO2010093724A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040130425A1 (en) * | 2002-08-12 | 2004-07-08 | Tal Dayan | Enhanced RF wireless adaptive power provisioning system for small devices |
US20080203815A1 (en) * | 2002-12-26 | 2008-08-28 | Takao Ozawa | Vehicle Antitheft Device and Control Method of a Vehicle |
US20050068019A1 (en) * | 2003-09-30 | 2005-03-31 | Sharp Kabushiki Kaisha | Power supply system |
US20080278264A1 (en) * | 2005-07-12 | 2008-11-13 | Aristeidis Karalis | Wireless energy transfer |
US20090072629A1 (en) * | 2007-09-17 | 2009-03-19 | Nigel Power, Llc | High Efficiency and Power Transfer in Wireless Power Magnetic Resonators |
US20090243397A1 (en) * | 2008-03-05 | 2009-10-01 | Nigel Power, Llc | Packaging and Details of a Wireless Power device |
Cited By (27)
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US20190334383A1 (en) * | 2009-07-22 | 2019-10-31 | Sony Corporation | Power receiving apparatus, power transmission system, charging apparatus and power transmission method |
US11070089B2 (en) * | 2009-07-22 | 2021-07-20 | Sony Corporation | Power receiving apparatus, power transmission system, charging apparatus and power transmission method |
US9438063B2 (en) | 2010-07-09 | 2016-09-06 | Industrial Technology Research Institute | Charge apparatus |
US10211664B2 (en) | 2010-07-09 | 2019-02-19 | Industrial Technology Research Institute | Apparatus for transmission of wireless energy |
US8803365B2 (en) * | 2010-12-14 | 2014-08-12 | Samsung Electro-Mechanics Co., Ltd. | Wireless power transmission/reception apparatus and method |
US20120146425A1 (en) * | 2010-12-14 | 2012-06-14 | Samsung Electro-Mechanics Co., Ltd. | Wireless power transmission/reception apparatus and method |
US8686590B2 (en) * | 2011-03-14 | 2014-04-01 | Simmonds Precision Products, Inc. | Wireless power transmission system and method for an aircraft sensor system |
US20120234971A1 (en) * | 2011-03-14 | 2012-09-20 | Simmonds Precision Products, Inc. | Wireless Power Transmission System and Method for an Aircraft Sensor System |
US20130082649A1 (en) * | 2011-09-30 | 2013-04-04 | Hyun Seok Lee | Wireless charging system |
US9979206B2 (en) | 2012-09-07 | 2018-05-22 | Solace Power Inc. | Wireless electric field power transfer system, method, transmitter and receiver therefor |
US10033225B2 (en) | 2012-09-07 | 2018-07-24 | Solace Power Inc. | Wireless electric field power transmission system, transmitter and receiver therefor and method of wirelessly transferring power |
US20140252813A1 (en) * | 2013-03-11 | 2014-09-11 | Robert Bosch Gmbh | Contactless Power Transfer System |
US10468914B2 (en) * | 2013-03-11 | 2019-11-05 | Robert Bosch Gmbh | Contactless power transfer system |
US10291059B2 (en) | 2014-05-09 | 2019-05-14 | Otter Products, Llc | Wireless charging apparatus |
US9698632B2 (en) | 2014-05-09 | 2017-07-04 | Otter Products, Llc | Wireless battery charger and charge-receiving device |
US9522604B2 (en) | 2014-08-04 | 2016-12-20 | Ford Global Technologies, Llc | Inductive wireless power transfer system having a coupler assembly comprising moveable permeable panels |
US10424942B2 (en) | 2014-09-05 | 2019-09-24 | Solace Power Inc. | Wireless electric field power transfer system, method, transmitter and receiver therefor |
US10326488B2 (en) | 2015-04-01 | 2019-06-18 | Otter Products, Llc | Electronic device case with inductive coupling features |
US9906066B2 (en) | 2015-04-13 | 2018-02-27 | Motorola Solutions, Inc. | Visor-mountable wireless charger and method of wireless charging |
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US20170179767A1 (en) * | 2015-12-21 | 2017-06-22 | Industrial Technology Research Institute | Coil assembly and wireless power transmission system |
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US9729187B1 (en) | 2016-02-01 | 2017-08-08 | Otter Products, Llc | Case with electrical multiplexing |
US11025097B2 (en) * | 2017-05-15 | 2021-06-01 | Ningbo Weie Electronics Technology Ltd. | Wireless charging management system and wireless power transmitting terminal |
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USD906958S1 (en) | 2019-05-13 | 2021-01-05 | Otter Products, Llc | Battery charger |
Also Published As
Publication number | Publication date |
---|---|
WO2010093724A1 (en) | 2010-08-19 |
JP2012517795A (en) | 2012-08-02 |
US8878393B2 (en) | 2014-11-04 |
TW201042878A (en) | 2010-12-01 |
CN102318213A (en) | 2012-01-11 |
US20100201189A1 (en) | 2010-08-12 |
CN102318213B (en) | 2014-02-26 |
KR20110114704A (en) | 2011-10-19 |
JP5480300B2 (en) | 2014-04-23 |
EP2396900A1 (en) | 2011-12-21 |
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