CN101772245A - LED lighting device capable of automatically adapting to power supply voltage - Google Patents
LED lighting device capable of automatically adapting to power supply voltage Download PDFInfo
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- CN101772245A CN101772245A CN201010126752A CN201010126752A CN101772245A CN 101772245 A CN101772245 A CN 101772245A CN 201010126752 A CN201010126752 A CN 201010126752A CN 201010126752 A CN201010126752 A CN 201010126752A CN 101772245 A CN101772245 A CN 101772245A
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Abstract
An LED lighting device capable of automatically adapting to power supply voltage can automatically adapt to power supply voltage variation by changing the series connection number of LED bulbs. The lighting device comprises a constant current source, a plurality of LED bulbs connected in series, a plurality of controllable LED bulbs connected in series, a logic switching circuit and a voltage detection unit. The constant current source, the plurality of LED bulbs connected in series and the plurality of controllable LED bulbs connected in series are connected in series and connected to a power supply. The voltage detection unit is also connected to the power supply. The output end of the voltage detection unit is connected with the input end of the logic switching circuit, and all output ends of the logic switching circuit are respectively connected with relative controllable LED bulbs connected in series. When the voltage of the power supply rises, the number of the LED bulbs is increased. When the voltage of the power supply drops, the number of the LED bulbs is reduced. Therefore, the total number of the bulbs working can best adapt to the current power supply voltage conditions. The present invention not only can ensure constant LED drive current, but also can make the linear constant current work in optimum electric conditions.
Description
Affiliated technical field
The utility model relates to a kind of LED lighting device, LED lighting device that especially can the adaptation power supply supply voltage.
Background technology
Characteristics such as that the LED lighting device has is energy-conservation, longevity meet national encourage growth green illumination, low-carbon (LC) social requirement, and its product has good market prospects.Yet because the operating characteristic of LED device, will cause that to the minor variations of its power supply very big electric current changes, so the LED device is very responsive to mains ripple, must work under a suitable electrical environment, to guarantee the working life of LED device.All the time, how keeping LED LED illumination device operating current constant is the key technology of its development of a restriction.Consider the unsettled fact of China's line voltage (general voltage ripple of power network is between 180V-250V), the important problem that the LED lighting device will solve is exactly when fluctuation takes place power supply, makes the operating current of LED keep constant.General solution has three kinds, the series resistance constant current at present; Linear constant-current source circuit constant current; The constant current of PWM Switching Power Supply.The constant-current characteristics of series resistance is undesirable, can only be used in the not high occasion of ask for something basically, can not really become the constant current measure of illumination LED light fixture.The constant current of PWM Switching Power Supply scheme is accurate, and the bucking voltage wide ranges can be good at solving the line voltage shakiness and drives the problem of bringing to LED, is the main flow scheme that present LED lamp drives.Many special pwm chips as the LED driving power are arranged both at home and abroad.But this scheme price is higher relatively, also has two deficiencies simultaneously: the one, and the PWM power supply itself is a consumption of electric power, PWM power supply average electrical efficient is 80% at present.Be electromagnetic interference problem in addition, the basic principle of PWM power work is exactly copped wave, and promptly speed-sensitive switch is cut into the changeable pulsating direct current of width with direct voltage, and the high-frequency high-speed pulsation must bring very big electromagnetic interference.Linear constant-current source circuit also has drive current precision preferably, and it needs only the constant-current source that just can constitute a working stability with several transistors and resistance, and price is much lower with respect to the PWM Switching Power Supply.Linear constant-current source circuit belongs to linear power supply, and the pulsation that does not have speed-sensitive switch to produce in the work is not so exist the electromagnetic interference phenomenon substantially.Number of patent application is that basic circuit is exactly the typical scenario of linear constant-current source circuit driving LED in two patents of invention of 02107078.4,02815923.3.Yet when supply power voltage has when changing by a relatively large margin, the voltage increment of variation all will be taken by linear constant-current source circuit, has increased the breakdown danger of constant current tube, and power also increases consumption simultaneously.Therefore this linear constant-current source circuit can only be operated under the little environment of supply power voltage variation.Number of patent application is that 200710193834.9 patent of invention is in order to solve this problem of linear constant-current source circuit, it has adopted the method for PWM Switching Power Supply and linear constant-current source circuit constant current to realize the LED constant-current driving, solve the problem of linear constant current circuit, but existed the intrinsic electromagnetic interference problem of Switching Power Supply also.
Summary of the invention
In order to overcome existing LED lighting device when fluctuation takes place power supply, the operating current of LED can not keep constant deficiency.The invention provides a kind of LED lighting device of adaptation power supply supply voltage, when fluctuation takes place power supply, can change series LED lamp pearl quantity automatically and adapt to change in voltage, make the operating current of LED keep constant.
The invention provides a kind of LED lighting device of adaptation power supply supply voltage, comprise controllable LED lamp pearl and the logic switching circuit and the voltage detection unit of the LED lamp pearl of constant-current source, some series connection, some series connection.The controllable LED lamp pearl series connection of the LED lamp pearl of constant-current source, some series connection and some series connection is connected to power supply, voltage detection unit is connected to power supply, the output of voltage detection unit links to each other with the input of logic switching circuit, and the control switch that each output of logic switching circuit is corresponding with the controllable LED lamp pearl of corresponding some series connection respectively is connected.
Constant-current source is a kind of linear constant-current source, the substantially linear constant-current driving structure that the controllable LED lamp pearl of LED lamp pearl that it is connected with some and some series connection is composed in series.
The LED series circuit is made up of the LED lamp pearl of some series connection and the controllable LED lamp pearl of some series connection.The lamp pearl number of the controllable LED lamp pearl of some series connection is dynamically to change at any time according to the variation of supply power voltage.The lamp pearl sum of participation work is that the lamp pearl of the controllable LED lamp pearl of the LED lamp pearl of some series connection and some the series connection that participate in work is counted sum.
Logic switching circuit is made up of logical circuit and switching circuit, just determines the number of switching circuit that open and closure according to the voltage of power supply, changes the number that the controllable LED lamp pearl of some series connection seals in.
Voltage detection unit is connected to power supply, and voltage detection unit is the voltage detecting circuit that comprises comparison circuit, reference circuit.Transient change by its monitoring power supply voltage.According to detected voltage height, by the action of logic switching circuit driving switch, the number that the controllable LED lamp pearl of some series connection of control seals in.
The controllable LED lamp pearl of some series connection can be replaced by the resistance of some controlled series.
The controllable LED lamp pearl of the LED lamp pearl of some series connection or some series connection is at least a LED lamp pearl.
The present invention has adopted a kind of lamp pearl series connection number that can automatically change to adapt to the LED lamp driving method that supply power voltage changes on basic constant-current driving architecture basics.Mainly solved owing to supply power voltage changes and caused that LED drives the problem that the additional change in voltage of constant-current source causes.When supply power voltage raises, increase the lamp pearl number of the controllable LED lamp pearl of some series connection, when supply power voltage reduces, reduce the lamp pearl number of the controllable LED lamp pearl of some series connection.The current supply power voltage situation of adaptation that the lamp pearl of participation work sum just can be best can guarantee the constant of LED drive current like this, and linear constant current circuit is operated under the only electrical environment.
Description of drawings
Fig. 1 is the principle schematic of the embodiment of the invention.
Fig. 2 is the circuit diagram of another embodiment of the present invention.
Fig. 3 is the circuit diagram of another embodiment of the present invention.
Fig. 4 is the circuit diagram of another embodiment of the present invention.
Among the figure: 1. constant-current source, 2. the LED lamp pearl of some series connection, 3. the controllable LED lamp pearl of some series connection, 4. logic switching circuit, 5. voltage detection unit.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.Referring to Fig. 1, the present invention is provided with the LED lamp pearl 2 of constant-current source 1, some series connection, the controllable LED lamp pearl 3 of some series connection, logic switching circuit 4, voltage detection unit 5.
Constant-current source 1 is a kind of linear constant-current source, and it can be made up of linear elements such as transistor, field effect transistor.The controllable LED lamp pearl 3 of the LED lamp pearl 2 that it is connected with some, some series connection is formed series circuit.Constant-current source carries out the constant current power supply to LED lamp pearl, guarantees the stable of LED operating current.
The controllable LED lamp pearl 3 of the LED lamp pearl 2 of some series connection, some series connection is formed series circuit.The LED lamp pearl 2 of some series connection is as basic normal alight pearl.By the lamp pearl number of the controllable LED lamp pearl 3 of some series connection of logic switching circuit control is dynamically to change at any time according to the variation of supply power voltage.The lamp pearl sum of participation work is that the lamp pearl of the LED lamp pearl 2 of some the series connection controllable LED lamp pearl 3 of connecting with some participation work is counted sum.
Determine logic switch K1 as required ... the switch number of Km, each switch can parallel way insert the controllable LED lamp pearl 3 of some corresponding series connection.When switch closure, then Dui Ying lamp integument short circuit.When switch was opened a way, then Dui Ying lamp pearl seals in the loop, and was normally luminous.
Fig. 2 is logic switch K1 of the present invention ... the another kind of method of attachment of Km.The controllable LED lamp pearl 3 corresponding lamp pearls of one end of every group of switch and some series connection connect, and the other end then is directly connected to the negative terminal of power supply.When some switch closures, the LED lamp pearl of the following serial connection of the LED lamp pearl of corresponding this switch and this lamp pearl is all by short circuit.When some switch opens, then corresponding lamp pearl seals in the loop, and is normally luminous.
Referring to Fig. 3, present embodiment adopts resistance to replace the controllable LED lamp pearl 3 of corresponding some series connection.
Referring to Fig. 4, present embodiment adopts resistance to replace the controllable LED lamp pearl 3 and the logic dynamic switch of corresponding some series connection to connect power supply negative terminal, can play bear the effect that supply power voltage increase identical with LED lamp pearl equally.
Claims (6)
1. the LED lighting device of an adaptation power supply supply voltage is characterized in that: the controllable LED lamp pearl and logic switching circuit and the voltage detection unit that comprise the LED lamp pearl of constant-current source, some series connection, some series connection.The controllable LED lamp pearl series connection of the LED lamp pearl of constant-current source, some series connection and some series connection is connected to power supply, voltage detection unit is connected to power supply, the output of voltage detection unit links to each other with the input of logic switching circuit, and each output of logic switching circuit is connected with the controllable LED lamp pearl of corresponding some series connection respectively.
2. the LED lighting device of a kind of adaptation power supply supply voltage according to claim 1 is characterized in that: described constant-current source is a kind of linear constant-current source, and it can be made up of linear elements such as transistor, field effect transistor.
3. the LED lighting device of a kind of adaptation power supply supply voltage according to claim 1 is characterized in that: described controllable LED lamp pearl be a kind of can be by the LED lamp group of short circuit, it can be made of the LED lamp pearl that is at least electronic switch in parallel.
4. the LED lighting device of a kind of adaptation power supply supply voltage according to claim 1 is characterized in that: described controllable LED lamp pearl can replace with controllable resistor, and controllable resistor is made of the resistance that is at least one electronic switch in parallel.
5. the LED lighting device of a kind of adaptation power supply supply voltage according to claim 1 is characterized in that: the output of described logic switching circuit is connected with each controllable LED lamp pearl of the controllable LED lamp pearl of some series connection respectively.
6. according to claim 1 or 3 or the LED lighting device of described a kind of adaptation power supply supply voltage, it is characterized in that: described electronic switch in parallel is to be used for short circuit LED lamp pearl, its connection also can a termination LED lamp pearl, another termination potential minimum or maximum potential.
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| CN201010126752A CN101772245A (en) | 2010-03-12 | 2010-03-12 | LED lighting device capable of automatically adapting to power supply voltage |
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| CN201010126752A CN101772245A (en) | 2010-03-12 | 2010-03-12 | LED lighting device capable of automatically adapting to power supply voltage |
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| CN101772245A true CN101772245A (en) | 2010-07-07 |
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Cited By (24)
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| CN102378447A (en) * | 2010-08-23 | 2012-03-14 | 三星Led株式会社 | Ac driven light emitting device |
| CN102444814A (en) * | 2010-10-12 | 2012-05-09 | 吕世泽 | Energy-saving illuminating device |
| CN102811538A (en) * | 2012-07-24 | 2012-12-05 | 上海亚明照明有限公司 | Driving circuit for light emitting diode (LED) module |
| WO2013023609A1 (en) * | 2011-08-16 | 2013-02-21 | Huizhou Light Engine Limited | Light engine with led switching array |
| CN103347346A (en) * | 2013-07-22 | 2013-10-09 | 石家庄市京华电子实业有限公司 | High-efficiency LED driving circuit |
| CN103379706A (en) * | 2012-04-20 | 2013-10-30 | 瑞鼎科技股份有限公司 | Driving circuit |
| WO2013177884A1 (en) * | 2012-05-31 | 2013-12-05 | 宁波福泰电器有限公司 | Self-adaptive led daylight lamp |
| CN103716935A (en) * | 2012-09-29 | 2014-04-09 | 钰瀚科技股份有限公司 | Drive device of a number of lighting units based on light emitting diodes |
| CN103814624A (en) * | 2011-07-28 | 2014-05-21 | 克里公司 | Solid state lighting apparatus and methods of using integrated driver circuitry |
| CN103912806A (en) * | 2013-01-04 | 2014-07-09 | Lg伊诺特有限公司 | Light emitting module and lighting unit including the same |
| CN104244503A (en) * | 2013-06-18 | 2014-12-24 | 钰瀚科技股份有限公司 | Device for driving light-emitting diode string with high-voltage applied |
| US9041302B2 (en) | 2011-09-16 | 2015-05-26 | Cree, Inc. | Solid-state lighting apparatus and methods using energy storage |
| US9131569B2 (en) | 2010-05-07 | 2015-09-08 | Cree, Inc. | AC driven solid state lighting apparatus with LED string including switched segments |
| US9131561B2 (en) | 2011-09-16 | 2015-09-08 | Cree, Inc. | Solid-state lighting apparatus and methods using energy storage |
| WO2015139153A1 (en) * | 2014-03-17 | 2015-09-24 | 钰瀚科技股份有限公司 | Device for driving light-emitting diode using high voltage |
| WO2015176626A1 (en) * | 2014-05-20 | 2015-11-26 | 贵州光浦森光电有限公司 | Led large chip and optical machine module group |
| US9277605B2 (en) | 2011-09-16 | 2016-03-01 | Cree, Inc. | Solid-state lighting apparatus and methods using current diversion controlled by lighting device bias states |
| US9510413B2 (en) | 2011-07-28 | 2016-11-29 | Cree, Inc. | Solid state lighting apparatus and methods of forming |
| US9713211B2 (en) | 2009-09-24 | 2017-07-18 | Cree, Inc. | Solid state lighting apparatus with controllable bypass circuits and methods of operation thereof |
| CN108012380A (en) * | 2017-12-27 | 2018-05-08 | 苏州菲达旭微电子有限公司 | A kind of linear Width funtion constant current and constant power circuit and there is its LED light |
| US10264637B2 (en) | 2009-09-24 | 2019-04-16 | Cree, Inc. | Solid state lighting apparatus with compensation bypass circuits and methods of operation thereof |
| CN113447754A (en) * | 2021-06-08 | 2021-09-28 | 苏州方昇光电股份有限公司 | Testing device |
| CN115394101A (en) * | 2022-07-28 | 2022-11-25 | 杭州普乐科技有限公司 | Traffic signal lamp and assembling method thereof |
| CN108012380B (en) * | 2017-12-27 | 2024-04-19 | 广东基地照明有限公司 | Linear wide-voltage constant-current constant-power circuit and LED lamp with same |
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| CN101193484A (en) * | 2006-11-27 | 2008-06-04 | 夏普株式会社 | Led driver |
| CN201657419U (en) * | 2010-03-12 | 2010-11-24 | 陈林 | LED lighting device capable of self-adapting to voltage of power source |
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| CN101193484A (en) * | 2006-11-27 | 2008-06-04 | 夏普株式会社 | Led driver |
| CN201657419U (en) * | 2010-03-12 | 2010-11-24 | 陈林 | LED lighting device capable of self-adapting to voltage of power source |
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| US10264637B2 (en) | 2009-09-24 | 2019-04-16 | Cree, Inc. | Solid state lighting apparatus with compensation bypass circuits and methods of operation thereof |
| US9713211B2 (en) | 2009-09-24 | 2017-07-18 | Cree, Inc. | Solid state lighting apparatus with controllable bypass circuits and methods of operation thereof |
| US9131569B2 (en) | 2010-05-07 | 2015-09-08 | Cree, Inc. | AC driven solid state lighting apparatus with LED string including switched segments |
| CN102378447A (en) * | 2010-08-23 | 2012-03-14 | 三星Led株式会社 | Ac driven light emitting device |
| CN102444814A (en) * | 2010-10-12 | 2012-05-09 | 吕世泽 | Energy-saving illuminating device |
| CN102444814B (en) * | 2010-10-12 | 2013-12-04 | 吕世泽 | Energy-saving illuminating device |
| CN103814624A (en) * | 2011-07-28 | 2014-05-21 | 克里公司 | Solid state lighting apparatus and methods of using integrated driver circuitry |
| US9510413B2 (en) | 2011-07-28 | 2016-11-29 | Cree, Inc. | Solid state lighting apparatus and methods of forming |
| US9398654B2 (en) | 2011-07-28 | 2016-07-19 | Cree, Inc. | Solid state lighting apparatus and methods using integrated driver circuitry |
| WO2013023609A1 (en) * | 2011-08-16 | 2013-02-21 | Huizhou Light Engine Limited | Light engine with led switching array |
| CN102954366B (en) * | 2011-08-16 | 2016-06-22 | 惠州元晖光电股份有限公司 | There is the photo engine of light switching array |
| US9357604B2 (en) | 2011-08-16 | 2016-05-31 | Huizhou Light Engine Ltd. | Light engine with LED switching array |
| CN102954366A (en) * | 2011-08-16 | 2013-03-06 | 惠州元晖光电股份有限公司 | Light engine with led switching array |
| US9131561B2 (en) | 2011-09-16 | 2015-09-08 | Cree, Inc. | Solid-state lighting apparatus and methods using energy storage |
| US9041302B2 (en) | 2011-09-16 | 2015-05-26 | Cree, Inc. | Solid-state lighting apparatus and methods using energy storage |
| US9277605B2 (en) | 2011-09-16 | 2016-03-01 | Cree, Inc. | Solid-state lighting apparatus and methods using current diversion controlled by lighting device bias states |
| CN103379706B (en) * | 2012-04-20 | 2015-05-20 | 瑞鼎科技股份有限公司 | Driving circuit |
| CN103379706A (en) * | 2012-04-20 | 2013-10-30 | 瑞鼎科技股份有限公司 | Driving circuit |
| WO2013177884A1 (en) * | 2012-05-31 | 2013-12-05 | 宁波福泰电器有限公司 | Self-adaptive led daylight lamp |
| CN102811538A (en) * | 2012-07-24 | 2012-12-05 | 上海亚明照明有限公司 | Driving circuit for light emitting diode (LED) module |
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| CN103716935B (en) * | 2012-09-29 | 2016-01-13 | 钰瀚科技股份有限公司 | Based on the drive unit of a majority illumination unit of light-emitting diode |
| CN103912806B (en) * | 2013-01-04 | 2018-01-12 | Lg伊诺特有限公司 | Light emitting module and the lighting device including the light emitting module |
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| CN103347346A (en) * | 2013-07-22 | 2013-10-09 | 石家庄市京华电子实业有限公司 | High-efficiency LED driving circuit |
| WO2015139153A1 (en) * | 2014-03-17 | 2015-09-24 | 钰瀚科技股份有限公司 | Device for driving light-emitting diode using high voltage |
| WO2015176626A1 (en) * | 2014-05-20 | 2015-11-26 | 贵州光浦森光电有限公司 | Led large chip and optical machine module group |
| CN108012380A (en) * | 2017-12-27 | 2018-05-08 | 苏州菲达旭微电子有限公司 | A kind of linear Width funtion constant current and constant power circuit and there is its LED light |
| CN108012380B (en) * | 2017-12-27 | 2024-04-19 | 广东基地照明有限公司 | Linear wide-voltage constant-current constant-power circuit and LED lamp with same |
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Application publication date: 20100707 |