CN101667011B - Alternating current power supply electronic clock with power saving structure - Google Patents
Alternating current power supply electronic clock with power saving structure Download PDFInfo
- Publication number
- CN101667011B CN101667011B CN 200910109311 CN200910109311A CN101667011B CN 101667011 B CN101667011 B CN 101667011B CN 200910109311 CN200910109311 CN 200910109311 CN 200910109311 A CN200910109311 A CN 200910109311A CN 101667011 B CN101667011 B CN 101667011B
- Authority
- CN
- China
- Prior art keywords
- circuit
- electronic clock
- power
- power supply
- chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention discloses an alternating current power supply electronic clock with a power saving structure, comprising an electronic clock main body, which is characterized in that the electronic clock is provided with a power-switching circuit capable of saving power, the power-switching circuit is positioned outside the electronic clock main body and connected with the electronic clock circuit of the electronic clock, transfers the voltage of an urban electricity power supply circuit into a direct voltage consistent with the time oscillating frequency of the electronic clock and outputs thedirect voltage to the power output end of the electronic clock circuit. The power-switching circuit comprises a rectifying circuit, an auto-excitation type intermittent oscillation circuit, an outputcircuit and a feedback circuit, wherein the auto-excitation type intermittent oscillation circuit comprises a switch transformer T1, a flux reset circuit, a power regulation chip IC1 and a supply circuit of the power regulation chip. The invention has the characteristics of high electric energy transformation efficiency, obvious energy saving effect, high stability of output voltage, little source effect and load effect, small volume, light weight, global utilization and the like.
Description
[technical field]
The present invention relates to electronic clock, particularly relate to a kind of AC power electronic clock with economize on electricity structure than conventional AC power supply electronic clock economize on electricity 40～50%.
[background technology]
As everyone knows, clock is a kind of timing tool.It is more important than mechanical watch that contemporary development of electronic technology makes that electronic clock becomes, and uses timing tool more widely, and it has been widely used in the various aspects of people's life.Electronic clock comprises the crystal clock that uses battery to make direct supply and quartz watch and the electronic clock that uses AC power.Though do the not outer power supply of electronic clock of power supply with battery,, thereby be only applicable to miniature electronic timer such as wrist-watch because battery is limited serviceable life.For the electronic clock that uses AC power, basically all adopt the traditional approach power supply, promptly the alternating voltage of the 90V～240V that is provided by urban distribution network (some countries and regions supply voltage difference) is through the transformer step-down, and behind the rectifying and wave-filtering as the electronic clock power supply.
This class uses the power circuit of the electronic clock of AC power to be divided into built-in power circuit and external power supply circuit two classes again.Wherein, the built-in power circuit is that AC and DC is changed and step-down is used transformer and current rectifying and wave filtering circuit are placed in the clock body, and the defective of the built-in structure of this power circuit is conspicuous.At first, because the transformation of its transformer is the low frequency transformation, make that the electric energy loss of the iron core of transformer and coil is bigger, energy conversion efficiency is low, and its conversion efficiency is about 30% only, causes the transformer heating more serious, and electric energy loss is big.Second, because its transformer is traditional silicon steel sheet transformer, volume and occupation space are big, make that the volume of electronic clock is big, and weight is heavier, for the electronic clock of onesize display screen, the overall volume of the electronic clock of this built-in power circuit is much bigger, thereby has caused raw-material waste.The 3rd, the electronic clock of this built-in power circuit makes it to use in single country owing to be subjected to the restriction of single input ac voltage, the time missionary society change with Alternating Current Power Supply, and timing error is big.Secondly, because transformer heating and circuit function are single etc. former thereby cause the dc voltage stability exported poor, voltage fluctuation is big.
For this reason, also there is the people that the power circuit of electronic clock is external, though it has solved the excessive problem of inner heat, volume of electronic clock, but because its power circuit still be the low frequency transformation, thus still exist the loss of transformer core and coil big, the existing problem of built-in power circuit such as energy conversion efficiency is low, the electric energy loss is big.And because its volume of transformer is big, therefore the volume of this independent external power supply is big, and weight is heavier, and heating is bigger.Obviously, the more important thing is that it does not solve the big problem of electric energy loss of electronic clock.
Critical defects such as mentioned above, it is low that the electronic clock of the built-in power circuit of this quasi-tradition has energy conversion efficiency, and electric energy loss is big.In short supply day by day along with tellurian generating resource, increasing day by day of power consumption and day being becoming tight of electric power supply have energy-conservationly become the focus that the whole world is paid close attention to, and become the common urgent task that various countries face.Yet, up to now, the energy consumption issues of the electronic clock of above-mentioned built-in power circuit is not caused enough attention of people as yet, and does not still have effective solution.
[summary of the invention]
The present invention is intended to thoroughly solve the energy consumption issues of AC power electronic clock, and provide a kind of energy conversion efficiency height, has obvious energy saving effect, output voltage stabilization degree height, source effect and load effect are less, volume is little, and is in light weight, the AC power electronic clock with economize on electricity structure that can use in the world.
For addressing the above problem, the invention provides a kind of AC power electronic clock with economize on electricity structure, this AC power electronic clock comprises the electronic clock main body, it is characterized in that, this electronic clock has one and places the power-switching circuit that economizes on electricity that the electronic clock main body is outside and link to each other with its electronic clock circuit, this power-switching circuit is a DC voltage with the voltage transitions of urban electricity supply circuit, and outputs to the power input of electronic clock circuit.
Power-switching circuit comprises rectification circuit, auto-excitation type intermittent oscillation circuit, output circuit and feedback circuit, wherein, the auto-excitation type intermittent oscillation circuit comprises the feed circuit of switch transformer T1, magnetic-reset circuit, power supply adjustment chip IC 1 and power supply adjustment chip, described rectification circuit is connected with 90V～240V ac power circuit, and exports a high-voltage dc voltage; Switch transformer T1 is located between rectification circuit and the output circuit, on the elementary winding of switch transformer T1 and be connected to the magnetic-reset circuit, the feedback winding of switch transformer T1 is connected with the feed circuit that power supply is adjusted chip, and the secondary winding of switch transformer T1 is connected with output circuit; Feedback circuit is adjusted chip IC 1 with output circuit and power supply respectively and is connected.
The magnetic-reset circuit of auto-excitation type intermittent oscillation circuit comprises diode D1, resistance R 3 and capacitor C 5, and wherein, the end of diode D1 and switch transformer T1 and power supply are adjusted chip IC 1 and connect, and the other end of diode D1 and resistance R 3 and capacitor C 5 also connect.
Power supply is adjusted chip IC 1 and is integrated with switching tube, oscillatory circuit and pulse width modulation circuit, is connected with oscillating capacitance C4 on its pin 2, and its pin 4 is a feedback input end.
The feed circuit of power supply adjustment chip comprise feedback winding, diode D3 and the capacitor C 6 of switch transformer T1, and diode D3 and capacitor C 6 are connected to the pin 3 that power supply is adjusted chip IC 1, and the other end of diode D3 is connected with the feedback winding of switch transformer T1.
Output circuit comprises diode D4, capacitor C 9, C10, C11, and inductance L 3 and resistance R 11, wherein, diode D4, capacitor C 11 and resistance R 11 constitute rectification circuit, and capacitor C 9, C10 and inductance L 3 constitute filtering circuit.
Feedback circuit comprises triode Q2, capacitor C 8 and resistance R 4, R5, R6, R7, R8, R12 and photoelectrical coupler IC2, wherein, triode thyrister Q2, capacitor C 8 and resistance R 6, R7, R8 constitutes sampling and reference circuit, this sampling and reference circuit are connected in the output terminal of described output circuit, photoelectrical coupler IC2 and resistance R 4, R5, R12 constitutes feedback circuit, this feedback circuit is connected between the input end of described sampling and reference circuit and output circuit, the variation of output voltage is fed back to the pulse width modulation circuit that power supply is adjusted chip IC 1, and isolate input circuit and output circuit, make circuit safer.
The electronic clock circuit is any in LED electronic clock or the LCD electronic clock circuit.
The electronic clock circuit comprises electronic clock chip U4 and peripheral circuit thereof, and electronic clock chip U4 links to each other with LED 1～LED4 through triode Q1～Q4.
Power-switching circuit is connected with power supply input pin VDD1～VDD3 of electronic clock chip U4 through the voltage stabilizing chip.
Contribution of the present invention is that it efficiently solves the existing problem of traditional built-in power circuit AC power electronic clock.Place the electronic clock outside owing to will have the power-switching circuit of multiple functions such as step-down, rectification, pulse-width regulated and output voltage feedback regulation, and it is directly connected to LED electronic clock circuit, thereby dwindled the electronic clock volume, alleviated weight.The more important thing is, because traditional low frequency transformation is changed into high pressure power frequency transformation, and output low pressure high-frequency current, thereby greatly improved energy conversion efficiency, make the average power conversion efficiency up to more than 65%, and output voltage stabilization degree height, source effect and load effect are less, the brightness uniformity of LED lamp is good, clock face shows that variation is little, this has not only guaranteed the accuracy and the stability of electronic clock timing, and has obvious energy-saving effect, meets the target that countries in the world are being advocated and made great efforts.Also, therefore can use in the world because the present invention is applicable to the voltage range of broad.
[description of drawings]
Fig. 1 is an one-piece construction profile synoptic diagram of the present invention.
Fig. 2 is a power-switching circuit structured flowchart of the present invention.
Fig. 3 is a power-switching circuit schematic diagram of the present invention.
Fig. 4 is LED electronic clock embodiment circuit theory diagrams of the present invention.
Fig. 5 is the show state figure of the LED electronic clock of Fig. 4.
Fig. 6 is LCD electronic clock embodiment circuit theory diagrams of the present invention.
Fig. 7 be Fig. 6 the show state figure of LCD electronic clock.
[embodiment]
The following example is to further explanation of the present invention and explanation, and the present invention is not constituted any limitation.
Electronic clock described in the present invention comprises LED electronic clock for household use and LCD electronic clock.Consult Fig. 1, Fig. 2, AC power electronic clock 100 with economize on electricity structure of the present invention comprises electronic clock main body 10, power-switching circuit 20 and electronic clock circuit 30, wherein, electronic clock main body 10 comprises housing 11, is located at the display screen 12 of housing front side and is located at case top or the function button of side 13, the shape of housing 11 is unrestricted, and display screen 12 can be LED display or LCDs LCD.Described electronic clock circuit 30 can be any in LED electronic clock or the LCD electronic clock circuit, i.e. the present invention is applicable to various electronic clock circuit.
Main points of the present invention are, this electronic clock 100 has the economize on electricity structure, specifically, this economize on electricity structure is that the power-switching circuit 20 that can economize on electricity is located at electronic clock main body 10 outsides, and link to each other with its electronic clock circuit 30 by lead 25, to overcome owing to traditional built-in a series of problems that produced of power-switching circuit.This power-switching circuit 20 is a DC voltage with the voltage transitions of urban electricity supply circuit, and outputs to the power input of electronic clock circuit 30.
The structure of this power-switching circuit 20 such as Fig. 2, shown in Figure 3, it comprises rectification circuit 21, auto-excitation type intermittent oscillation circuit 22, output circuit 23 and feedback circuit 24.
As Fig. 3, described rectification circuit 21 comprises protective tube FUSE, rectification module U1, capacitor C 1, C2, inductance L 1 and resistance R 1, wherein, and capacitor C 1, C2, inductance L 1 and resistance R 1 are formed filtering circuit.The family expenses alternating current of 90V～240V/50Hz～60Hz by 21 pairs of inputs of this rectification circuit carries out rectification, filtering, and obtains a high-voltage dc voltage at output terminal.
Described auto-excitation type intermittent oscillation circuit 22 as shown in Figure 3, it comprises switch transformer T1, magnetic-reset circuit 221, power supply is adjusted the feed circuit 222 of chip IC 1 and power supply adjustment chip, wherein, switch transformer T1 is connected between rectification circuit 21 and the output circuit 23, the elementary winding 1 of switch transformer T1, on 3 and be connected to magnetic-reset circuit 221, the feedback winding 2 of switch transformer T1,4,5 are connected with feed circuit 222 that power supply is adjusted chip, the secondary winding 6 of switch transformer T1,10 are connected with output circuit 23, this switch transformer plays NE BY ENERGY TRANSFER and transformation, thereby input direct voltage is modulated into a high-frequency pulse voltage.When the switching tube conducting in the power supply adjustment chip IC 1, switch transformer converts electric energy to magnetic field energy and stores, and then discharges when switching tube ends.Described magnetic-reset circuit 22 comprises diode D1, resistance R 3 and capacitor C 5, and wherein, the end of diode D1 and switch transformer T1 and power supply are adjusted chip IC 1 and connect, and the other end of diode D1 and resistance R 3 and capacitor C 5 also connect.When power supply adjustment chip IC 1 switch inside pipe ends, electric current on the dimension level winding 6,10 flows through, on elementary winding 1,3, induction electromotive force is arranged, by diode D1 conducting, be added on capacitor C 5 and the resistance R 3, with feeding back winding 2,4,5 and diode D3 together, the magnetic flux on the switch transformer T1 that releases also reduces heating, raises the efficiency.Described power supply is adjusted chip IC 1 and is integrated with switching tube, oscillatory circuit and pulse width modulation circuit, but it selects the commercially available chip of write-in program for use.Be connected with oscillating capacitance C4 on the pin 2 of power supply adjustment chip IC 1, its pin 4 is a feedback input end.The feed circuit 222 of power supply adjustment chip comprise feedback winding 2,4,5, diode D3 and the capacitor C 6 of switch transformer T1, diode D3 and capacitor C 6 are connected to the pin 3 that power supply is adjusted chip IC 1, the other end of diode D3 is connected with the feedback winding 2,4,5 of switch transformer T1, and this circuit is used for adjusting chip IC 1 power supply to power supply.As Fig. 3, by this auto-excitation type intermittent oscillation circuit 22 high voltage direct current of rectification circuit 21 outputs is become the higher alternating current of frequency, and export the alternating current of a upper frequency by the secondary winding 6,10 of switch transformer T1.
As Fig. 3, described output circuit 23 comprises diode D4, capacitor C 9, C10, C11, and inductance L 3 and resistance R 11, wherein, diode D4, capacitor C 11 and resistance R 11 constitute rectification circuit, and capacitor C 9, C10 and inductance L 3 constitute filtering circuit.This output circuit will AC rectification filtering by the upper frequency of secondary winding 6,10 output of switch transformer T1 after, the direct current of output 5V voltage.
In order to guarantee the stability of output voltage, between output circuit 23 and auto-excitation type intermittent oscillation circuit 22, be provided with feedback circuit 24, as Fig. 3, this feedback circuit 24 comprises triode thyrister Q2, capacitor C 8 and resistance R 4, R5, R6, R7, R8, R12 and photoelectrical coupler IC2, wherein, triode Q2, capacitor C 8 and resistance R 6, R7, R8 constitutes sampling and reference circuit, this sampling and reference circuit are connected in the output terminal of described output circuit 23, photoelectrical coupler IC2 and resistance R 4, R5, R12 constitutes feedback circuit, the variation of output voltage is fed back to the pulse width modulation circuit of power supply adjustment chip IC 1.When the output voltage of output circuit 23 is lower than requirement voltage 5V, feedback circuit will feed back to the pulse width modulation circuit that power supply is adjusted chip IC 1 by the feedback pin 4 that the voltage signal that sampling and reference circuit are obtained is adjusted chip IC 1 through power supply, make oscillation frequency raise, output voltage is raise; When output voltage was higher than requirement voltage 5V, oscillation frequency reduced, and output voltage is reduced, and therefore made output voltage obtain real-time regulated, had guaranteed the stability of output voltage.
Fig. 4, Fig. 5 show alternating current LED electronic clock embodiment circuit theory diagrams of the present invention and show state figure, electronic clock circuit 30 wherein comprises electronic clock chip U4 and peripheral circuit thereof, and electronic clock chip U4 links to each other with four LED 1～LED4 through triode Q1～Q4.Among Fig. 4, power-switching circuit 20 is connected with power supply input pin VDD1～VDD3 of electronic clock chip U4 through voltage stabilizing chip 40, and electronic clock chip U4 links to each other with four LED 1～LED4 through triode Q1～Q4.Power-switching circuit 20 places electronic clock main body 10 outsides (referring to Fig. 1).The show state of this LED electronic clock as shown in Figure 5.A among Fig. 4 is the crystal oscillation circuit of electronic clock chip U4.This LED electronic clock circuit 30 has the oscillation frequency scalable, and the time difference can be controlled, and the error of clock is little, time accuracy height, the energy conversion efficiency height, power savings is remarkable, and volume is little, in light weight, voltage range is wide, can be in characteristics such as the normal uses of country variant.
Fig. 6, Fig. 7 show alternating current LCD electronic clock embodiment circuit theory diagrams and the show state figure with backlight of the present invention, because of the backlight of LCD electronic clock will have light-illuminating for a long time, therefore also need the family expenses Alternating Current Power Supply.Among Fig. 6, power-switching circuit 20 is connected with power supply input pin VDD1～VDD3 of electronic clock chip U2 through voltage stabilizing chip 40, and electronic clock chip U2 links to each other with two LEDs 5, LED6 through triode Q1～Q4, is used to provide backlight.Power-switching circuit 20 places electronic clock main body 10 outsides (referring to Fig. 1).The show state of this LCD electronic clock as shown in Figure 7.This LCD electronic clock circuit 30 has the oscillation frequency scalable, and the time difference can be controlled, and the error of clock is little, time accuracy height, the energy conversion efficiency height, power savings is remarkable, and volume is little, in light weight, voltage range is wide, can be in characteristics such as the normal uses of country variant.
Claims (9)
- One kind have the economize on electricity structure the AC power electronic clock, comprise electronic clock main body (10), it is characterized in that, this electronic clock has one and places the power-switching circuit that economizes on electricity (20) that electronic clock main body (10) is outside and link to each other with its electronic clock circuit (30), this power-switching circuit (20) comprises rectification circuit (21), auto-excitation type intermittent oscillation circuit (22), output circuit (23) and feedback circuit (24), wherein, auto-excitation type intermittent oscillation circuit (22) comprises switch transformer T1, magnetic-reset circuit (22), power supply is adjusted the feed circuit (222) of chip IC 1 and power supply adjustment chip, described rectification circuit (21) is connected with 90V～240V ac power circuit, and exports a high-voltage dc voltage; Switch transformer T1 is located between rectification circuit (21) and the output circuit (23), magnetic-reset circuit (22) is gone up and be connected to the elementary winding of switch transformer T1 (1,3), the feedback winding of switch transformer T1 (2,4,5) is connected with the feed circuit (222) that power supply is adjusted chip, and the secondary winding of switch transformer T1 (6,10) is connected with output circuit (23); Feedback circuit (24) is adjusted chip IC 1 with output circuit (23) and power supply respectively and is connected, this power-switching circuit (20) is the DC voltage consistent with the timing oscillation frequency of electronic clock with the voltage transitions of urban electricity supply circuit, and outputs to the power input of electronic clock circuit (30).
- 2. the AC power electronic clock with economize on electricity structure as claimed in claim 1, it is characterized in that, the magnetic-reset circuit (22) of described auto-excitation type intermittent oscillation circuit comprises diode D1, resistance R 3 and capacitor C 5, wherein, the end of diode D1 and switch transformer T1 and power supply are adjusted chip IC 1 and are connect, and the other end of diode D1 and resistance R 3 and capacitor C 5 also connect.
- 3. the AC power electronic clock with economize on electricity structure as claimed in claim 1, it is characterized in that, described power supply is adjusted chip IC 1 and is integrated with switching tube, oscillatory circuit and pulse width modulation circuit, is connected with oscillating capacitance C4 on its pin 2, and its pin 4 is a feedback input end.
- 4. the AC power electronic clock with economize on electricity structure as claimed in claim 1, it is characterized in that, the feed circuit (222) of described power supply adjustment chip comprise feedback winding (2,4,5), diode D3 and the capacitor C 6 of switch transformer T1, diode D3 and capacitor C 6 are connected to the pin 3 that power supply is adjusted chip IC 1, and the other end of diode D3 is connected with the feedback winding (2,4,5) of switch transformer T1.
- 5. the AC power electronic clock with economize on electricity structure as claimed in claim 1, it is characterized in that, described output circuit (23) comprises diode D4, capacitor C 9, C10, C11, inductance L 3 and resistance R 11, wherein, diode D4, capacitor C 11 and resistance R 11 constitute rectification circuit, and capacitor C 9, C10 and inductance L 3 constitute filtering circuit.
- 6. the AC power electronic clock with economize on electricity structure as claimed in claim 1, it is characterized in that, described feedback circuit (24) comprises triode thyrister Q2, capacitor C 8 and resistance R 4, R5, R6, R7, R8, R12 and photoelectrical coupler IC2, wherein, triode thyrister Q2, capacitor C 8 and resistance R 6, R7, R8 constitutes sampling and reference circuit, this sampling and reference circuit are connected in the output terminal of described output circuit (23), photoelectrical coupler IC2 and resistance R 4, R5, R12 constitutes feedback circuit, this feedback circuit is connected between the input end of described sampling and reference circuit and output circuit (23), the variation of output voltage is fed back to the pulse width modulation circuit of power supply adjustment chip IC 1.
- 7. the AC power electronic clock with economize on electricity structure as claimed in claim 1 is characterized in that described electronic clock circuit (30) is any in LED electronic clock or the LCD electronic clock circuit.
- 8. the AC power electronic clock with economize on electricity structure as claimed in claim 7, it is characterized in that, described electronic clock circuit (30) comprises electronic clock chip U4 and peripheral circuit thereof, and electronic clock chip U4 links to each other with LED 1～LED4 through triode Q1～Q4.
- 9. the AC power electronic clock with economize on electricity structure as claimed in claim 8 is characterized in that described power-switching circuit (20) is connected with power supply input pin VDD1～VDD3 of electronic clock chip U4 through voltage stabilizing chip (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910109311 CN101667011B (en) | 2009-08-14 | 2009-08-14 | Alternating current power supply electronic clock with power saving structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910109311 CN101667011B (en) | 2009-08-14 | 2009-08-14 | Alternating current power supply electronic clock with power saving structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101667011A CN101667011A (en) | 2010-03-10 |
| CN101667011B true CN101667011B (en) | 2011-03-16 |
Family
ID=41803656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910109311 Expired - Fee Related CN101667011B (en) | 2009-08-14 | 2009-08-14 | Alternating current power supply electronic clock with power saving structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101667011B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102187492B1 (en) * | 2016-12-19 | 2020-12-08 | 지멘스 메디컬 솔루션즈 유에스에이, 인크. | Multi-synchronization power supply and ultrasound system with same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210293U (en) * | 1986-12-06 | 1987-12-16 | 山东省计算中心 | Multi-purpose digital clock time-program controller |
| CN87215744U (en) * | 1987-12-26 | 1988-09-28 | 曹健 | Electric switch clock |
| CN2150575Y (en) * | 1992-11-14 | 1993-12-22 | 范述江 | Digital alarm clock with charger and universal AC/DC control mains |
| CN2203788Y (en) * | 1994-05-18 | 1995-07-19 | 章成本 | Multi-function time-controlling clock |
| US5881022A (en) * | 1996-01-11 | 1999-03-09 | Illinois Information Technology Corporation | Frequency shifing device and method for automatic clock adjustment |
| US6147935A (en) * | 1999-11-30 | 2000-11-14 | Gtc Properties, Inc. | Transformerless LED digital alarm clock |
| KR20020079123A (en) * | 2001-04-13 | 2002-10-19 | 유준 | Multipurpose timer |
-
2009
- 2009-08-14 CN CN 200910109311 patent/CN101667011B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210293U (en) * | 1986-12-06 | 1987-12-16 | 山东省计算中心 | Multi-purpose digital clock time-program controller |
| CN87215744U (en) * | 1987-12-26 | 1988-09-28 | 曹健 | Electric switch clock |
| CN2150575Y (en) * | 1992-11-14 | 1993-12-22 | 范述江 | Digital alarm clock with charger and universal AC/DC control mains |
| CN2203788Y (en) * | 1994-05-18 | 1995-07-19 | 章成本 | Multi-function time-controlling clock |
| US5881022A (en) * | 1996-01-11 | 1999-03-09 | Illinois Information Technology Corporation | Frequency shifing device and method for automatic clock adjustment |
| US6147935A (en) * | 1999-11-30 | 2000-11-14 | Gtc Properties, Inc. | Transformerless LED digital alarm clock |
| KR20020079123A (en) * | 2001-04-13 | 2002-10-19 | 유준 | Multipurpose timer |
Non-Patent Citations (1)
| Title |
|---|
| 图1-5. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101667011A (en) | 2010-03-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104008735B (en) | LED backlight drive circuit and liquid-crystal display | |
| CN101437342B (en) | Low energy consumption monopole electronic switching circuit and micro energy consumption brightening circuit of indicating lamp | |
| CN102665339A (en) | Induction type wireless energy transmission light emitting diode (LED) drive circuit | |
| CN102570839A (en) | LLC (inductor-inductor-capacitance) resonant DC-DC (Direct Current-Direct Current) power supply capable of changing resonance frequency by changing capacitance | |
| JP2017121173A (en) | LLC Resonant Type Converter | |
| CN101790268B (en) | Light-emitting diode street lamp energy-saving automatic control method and device | |
| CN101667011B (en) | Alternating current power supply electronic clock with power saving structure | |
| CN104981078A (en) | LED music lamp based on Bluetooth control | |
| CN204350401U (en) | The small size LED drive power of adjustable current | |
| CN204156738U (en) | A kind of power supply and control circuit thereof | |
| CN102545617A (en) | DC-DC power source for LLC (double-inductance-capacitance) resonance vehicle with resonance frequency controlled by single chip microcomputer | |
| CN103025017B (en) | Light-emitting diode (LED) driving circuit based on parallel switch control | |
| CN104901563A (en) | USB socket | |
| CN203608099U (en) | Refrigeration device and power supply used in control system of refrigeration device | |
| CN204652249U (en) | A kind of USB socket | |
| CN204948408U (en) | A kind of LED music lamp based on Bluetooth control | |
| CN202663596U (en) | Induction type wireless energy transmission LED drive circuit | |
| CN207460553U (en) | It is a kind of to drive the constant voltage source of LED light strip and apply its LED light source | |
| CN202282641U (en) | Power supply circuit for high-frequency ignition of integrated stove | |
| US8866413B2 (en) | LED drive circuit | |
| CN203387408U (en) | Flyback switch power supply circuit | |
| CN201440642U (en) | Low-power switch power supply | |
| CN201114920Y (en) | Efficient electronic ballast for multi-lamp tube | |
| CN202759646U (en) | Power indicator | |
| US8379492B2 (en) | Energy saving digital timepiece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518110, E building, New Dragon Industrial Zone, library, Guanlan village, Guanlan Town, Shenzhen, Guangdong, Baoan District Patentee after: Shenzhen strong innovation technology industry Co., Ltd. Address before: 518110, E building, New Dragon Industrial Zone, library, Guanlan village, Guanlan Town, Shenzhen, Guangdong, Baoan District Patentee before: Shenzhen City Great Power Enterprise Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110316 Termination date: 20180814 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |