CN201937908U - Light emitting diode (LED) light source circuit - Google Patents
Light emitting diode (LED) light source circuit Download PDFInfo
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- CN201937908U CN201937908U CN2010206779401U CN201020677940U CN201937908U CN 201937908 U CN201937908 U CN 201937908U CN 2010206779401 U CN2010206779401 U CN 2010206779401U CN 201020677940 U CN201020677940 U CN 201020677940U CN 201937908 U CN201937908 U CN 201937908U
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- led
- constant flow
- light source
- flow module
- comparator
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Abstract
The utility model relates to a light emitting diode (LED) light source circuit, which comprises a constant current module and a plurality of LED branch circuits and is formed by parallelly connecting the constant current module and the LED branch circuits, wherein the constant current module adopts a direct current input power supply. The LED light source circuit adopting the technical scheme has the advantages that because the constant current module is adopted for driving the LED branch circuits, the constant current module adopts a direct current input power supply, the circuit is simple, and the cost is low.
Description
Technical field
The utility model belongs to the LED lighting technology, relates in particular to a kind of led light source.
Background technology
Because LED efficient height, good reliability, so led light source is a kind of very promising low energy consumption light source, led light source comprises the LED luminous element be made up of LED and the led drive circuit of driving LED luminous element usually.Existing LED luminous element is complex structure mostly, and the output of the light of LED luminous element is directly relevant with the electric current of the LED that flows through; If the LED electric current is out of control, the LED long-term work will influence its reliability and life-span under improper electric current, and might lose efficacy; If the unstable people of LED electric current can think that light source has flickering, so led drive circuit preferably can be stablized the size of regulating and controlling LED electric current.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of stabilized intensity, flicker free sense, high-efficiency LED circuit of light sources.
For solving the problems of the technologies described above, the utility model by the following technical solutions: a kind of led light source circuit, comprise constant flow module, LED multi-path branch road, constant flow module and LED multi-path branch road are formed in parallel, constant flow module adopts direct-current input power supplying.
Best described constant flow module has voltage stabilizing circuit, its voltage stabilizing circuit is provided with reference voltage output terminal, described every paths of LEDs branch road includes sample resistance, comparator, NPN triode and a plurality of high-powered LED lamp, its output connected the collector electrode of NPN triode after described a plurality of high-powered LED lamp was connected successively, the NPN transistor emitter connects sample resistance, and be connected to the comparator negative pole through sample resistance, comparator is anodal to be connected with the reference voltage output terminal of constant flow module, and the output of comparator is connected in the base stage of NPN triode.
Adopt the led light source circuit of technique scheme, owing to adopt constant flow module to come the driving LED branch road, constant flow module adopts direct-current input power supplying, and its circuit is simple, and cost is low.If adopt further design for scheme, then its every paths of LEDs branch road is independently controlled, there is not association mutually, relatively control triode adjustment actual current by the reference voltage of voltage stabilizing circuit and become needed electric current, service behaviour of LED the best and permanent working life, good reliability and efficient height are guaranteed in LED stabilized intensity, flicker free sense.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the circuit theory diagrams of a kind of embodiment of the utility model.
Embodiment
As shown in Figure 1, a kind of embodiment of the utility model led light source circuit comprises constant flow module, LED multi-path branch road, and constant flow module and LED multi-path branch road are formed in parallel.Described constant flow module has its voltage stabilizing circuit M, and adopts direct-current input power supplying, its voltage stabilizing circuit M to be provided with reference voltage output terminal A end.Present embodiment has the LED branch road of four road same structures.One the tunnel being example wherein, comprise sample resistance R14, comparator U1B, NPN triode Q4 and 7 high-powered LED lamps, 7 great power LED series connection back outputs are connected to the collector electrode of NPN triode Q4, NPN triode Q4 emitter connects sample resistance R14, and be connected to comparator U1B negative pole through sample resistance R14, comparator U1B is anodal to be connected with the reference voltage output terminal A end of constant flow module, and the output of comparator is connected in the base stage of NPN triode.
Its principle is that sample resistance is serially connected in the led circuit, when actual current rises, sample resistance powers on and presses liter, through reference voltage that comparator provides itself and voltage stabilizing circuit M relatively after, the base stage control NPN triode adjustment actual current of transporting to the NPN triode becomes needed electric current, otherwise in like manner.Thereby control led light source accurately, the electric current that steady is provided is in LED.No interrelated between its each paths of LEDs branch road, independent control is beneficial to batch process, the properties of product unanimity.
Claims (2)
1. led light source circuit, it is characterized in that: comprise constant flow module, LED multi-path branch road, constant flow module and LED multi-path branch road are formed in parallel, and constant flow module adopts direct-current input power supplying.
2. led light source circuit according to claim 1, it is characterized in that: described constant flow module has voltage stabilizing circuit, its voltage stabilizing circuit is provided with reference voltage output terminal, described every paths of LEDs branch road includes sample resistance, comparator, NPN triode and a plurality of high-powered LED lamp, its output connected the collector electrode of NPN triode after described a plurality of high-powered LED lamp was connected successively, the NPN transistor emitter connects sample resistance, and be connected to the comparator negative pole through sample resistance, comparator is anodal to be connected with the reference voltage output terminal of constant flow module, and the output of comparator is connected in the base stage of NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206779401U CN201937908U (en) | 2010-12-24 | 2010-12-24 | Light emitting diode (LED) light source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206779401U CN201937908U (en) | 2010-12-24 | 2010-12-24 | Light emitting diode (LED) light source circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201937908U true CN201937908U (en) | 2011-08-17 |
Family
ID=44449409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206779401U Expired - Fee Related CN201937908U (en) | 2010-12-24 | 2010-12-24 | Light emitting diode (LED) light source circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201937908U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108444A (en) * | 2011-11-15 | 2013-05-15 | 登丰微电子股份有限公司 | LED current equalizing device |
-
2010
- 2010-12-24 CN CN2010206779401U patent/CN201937908U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108444A (en) * | 2011-11-15 | 2013-05-15 | 登丰微电子股份有限公司 | LED current equalizing device |
| CN103108444B (en) * | 2011-11-15 | 2015-11-18 | 登丰微电子股份有限公司 | LED current equalizing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20121224 |