CN103458552A - LED lamp and start control circuit thereof - Google Patents
LED lamp and start control circuit thereof Download PDFInfo
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- CN103458552A CN103458552A CN2012101725305A CN201210172530A CN103458552A CN 103458552 A CN103458552 A CN 103458552A CN 2012101725305 A CN2012101725305 A CN 2012101725305A CN 201210172530 A CN201210172530 A CN 201210172530A CN 103458552 A CN103458552 A CN 103458552A
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Abstract
The invention is applicable to the field of LED lamp control and particularly relates to an LED lamp and a start control circuit thereof. When a trigger signal input from the input end of a power source is high-level pulse, the high-level pulse passes a current-limiting resistor R1 to switch on a first switch tube; as the first switch tube is switched on, a second switch tube is also switched on; high level of the control end of the first switch tube is kept constantly through positive feedback of a positive feedback resistor R4, the first switch tube is switched on constantly, an LED of a photoelectric coupler emits light, the output end of the photoelectric coupler is switched on, and the start function of the LED lamp is achieved. The start control circuit is simple in structure, is composed of four resistors, two triodes and one photoelectric coupler only, and is low in cost.
Description
Technical field
The invention belongs to LED light fixture control field, relate in particular to a kind of LED light fixture and start control circuit thereof.
Background technology
LED be called as the 4th generation lighting source or green light source, there are the characteristics such as energy-saving and environmental protection, the life-span is long, volume is little, can be widely used in the fields such as various indications, demonstration, decoration, backlight, general lighting and urban landscape.
The switching on and shutting down of at present a lot of LED light fixtures are controlled by triggering level, and, need to use triggering level is maintained now, general solution can adopt integrated circuit (IC) to do, but this scheme circuit structure complexity, cost is higher.
Summary of the invention
The object of the present invention is to provide a kind of LED light fixture start control circuit, be intended to solve present LED light fixture start control circuit and have complex structure, problem that cost is high.
The present invention is achieved in that a kind of LED light fixture start control circuit, and described LED light fixture start control circuit comprises:
Current-limiting resistance R1, current-limiting resistance R2, current-limiting resistance R3, positive feedback resistor R4, the first switching tube, second switch pipe and photoelectrical coupler;
The first end of described current-limiting resistance R1 is as the input contact signalling source of LED light fixture start control circuit, the control end of described the first switching tube of the second termination of described current-limiting resistance R1, the input of described the first switching tube, output is connected between the anode of light-emitting diode of the first end of described current-limiting resistance R3 and described photoelectrical coupler, the control end of the described second switch pipe of the second termination of described current-limiting resistance R3, the input of described second switch pipe, output is connected between the first end of power supply and described positive feedback resistor R4, the control end of described the first switching tube of the second termination of described positive feedback resistor R4, described current-limiting resistance R2 is connected between the control end and power supply of described second switch pipe, the minus earth of the light-emitting diode of described photoelectrical coupler, the switch ends of the output termination LED light fixture of described photoelectrical coupler.
Another object of the present invention is to provide a kind of LED light fixture, described LED light fixture comprises LED light fixture start control circuit, and described LED light fixture start control circuit comprises:
Current-limiting resistance R1, current-limiting resistance R2, current-limiting resistance R3, positive feedback resistor R4, the first switching tube, second switch pipe and photoelectrical coupler;
The first end of described current-limiting resistance R1 is as the input contact signalling source of LED light fixture start control circuit, the control end of described the first switching tube of the second termination of described current-limiting resistance R1, the input of described the first switching tube, output is connected between the anode of light-emitting diode of the first end of described current-limiting resistance R3 and described photoelectrical coupler, the control end of the described second switch pipe of the second termination of described current-limiting resistance R3, the input of described second switch pipe, output is connected between the first end of power supply and described positive feedback resistor R4, the control end of described the first switching tube of the second termination of described positive feedback resistor R4, described current-limiting resistance R2 is connected between the control end and power supply of described second switch pipe, the minus earth of the light-emitting diode of described photoelectrical coupler, the switch ends of the output termination LED light fixture of described photoelectrical coupler.
In the present invention, when the triggering signal of power input input is high level pulse, high level pulse makes the first switching tube conducting after current-limiting resistance R1, the conducting of cause the first switching tube makes the also conducting of second switch pipe, and by the positive feedback of positive feedback resistor R4, make the control end of the first switching tube maintain high level always, the conducting always of the first switching tube, the lumination of light emitting diode of photoelectrical coupler, the output conducting of photoelectrical coupler, realize the function of LED light fixture start, this circuit structure is simple, only need four resistance, two triodes and a photoelectrical coupler just can be realized, and cost is low.
The accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the LED light fixture start control circuit that provides of first embodiment of the invention;
Fig. 2 is the circuit structure diagram of the LED light fixture start control circuit that provides of second embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the circuit structure of the LED light fixture start control circuit that first embodiment of the invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows.
LED light fixture start control circuit comprises:
Current-limiting resistance R1, current-limiting resistance R2, current-limiting resistance R3, positive feedback resistor R4, the first switching tube 100, second switch pipe 200 and photoelectrical coupler U1;
The first end of current-limiting resistance R1 is as the input contact signalling source of LED light fixture start control circuit, the control end of second termination the first switching tube 100 of current-limiting resistance R1, the input of the first switching tube 100, output is connected between the anode of light-emitting diode of the first end of current-limiting resistance R3 and photoelectrical coupler U1, the control end of the second termination second switch pipe 200 of current-limiting resistance R3, the input of second switch pipe 200, output is connected between the first end of power supply VCC and positive feedback resistor R4, the control end of second termination the first switching tube 100 of positive feedback resistor R4, current-limiting resistance R2 is connected between the control end and power supply VCC of second switch pipe 200, the minus earth of the light-emitting diode of photoelectrical coupler U1, the switch ends of the output termination LED light fixture of photoelectrical coupler U1.
As one embodiment of the invention, the first switching tube 100 adopts NPN type triode Q1, the control end that the base stage of NPN type triode Q1 is the first switching tube 100, the collector electrode of NPN type triode Q1 connects the first end of current-limiting resistance R3, and the emitter of triode Q1 connects the anode of the light-emitting diode of photoelectrical coupler U1.
As one embodiment of the invention, second switch pipe 200 adopts positive-negative-positive triode Q2, the control end that the base stage of positive-negative-positive triode Q2 is second switch pipe 200, the emitter of positive-negative-positive triode Q2 meets power supply VCC, and the collector electrode of positive-negative-positive triode Q2 connects the first end of positive feedback resistor R4.
Fig. 2 shows the circuit structure of the LED light fixture start control circuit that second embodiment of the invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows.
As one embodiment of the invention, the first switching tube 100 adopts N-type metal-oxide-semiconductor Q3, the control end that the grid of N-type metal-oxide-semiconductor Q3 is the first switching tube 100, the drain electrode of N-type metal-oxide-semiconductor Q3 connects the first end of current-limiting resistance R3, and the source electrode of N-type metal-oxide-semiconductor Q3 connects the anode of the light-emitting diode of photoelectrical coupler U1.
As one embodiment of the invention, second switch pipe 200 adopts P type metal-oxide-semiconductor Q4, the control end that the grid of P type metal-oxide-semiconductor Q4 is second switch pipe 200, and the source electrode of P type metal-oxide-semiconductor Q4 meets power supply VCC, and the drain electrode of P type metal-oxide-semiconductor Q4 connects the first end of positive feedback resistor R4.
The embodiment of the present invention also provides a kind of LED light fixture that adopts above-mentioned LED light fixture start control circuit.
Below with the first switching tube 100, adopt NPN type triode Q1, it is example that second switch pipe 200 adopts positive-negative-positive triode Q2, and the operation principle of LED light fixture start control circuit is described:
When having high level pulse to be added on NPN type triode Q1 base stage through current-limiting resistance R1, NPN type triode Q1 conducting, after NPN type triode Q1 conducting, through current-limiting resistance R2, the dividing potential drop of current-limiting resistance R3 drags down the base stage level of positive-negative-positive triode Q2, make also conducting of positive-negative-positive triode Q2, thereby the current collection that makes positive-negative-positive triode Q2 very high level adds to the base stage of NPN type triode Q1 after by positive feedback resistor R4 current limliting, make the base stage of NPN type triode Q1 maintain high level state always, NPN type triode Q1 is just conducting always also, after high level pulse disappears, NPN type triode Q1 also maintains conducting, also conducting always of light-emitting diode in photoelectrical coupler U1 so, the output closure of photoelectrical coupler U1, realize the function of LED light fixture start, until disappearing, supply voltage VCC just can make circuit restore to the original state.
In embodiments of the present invention, when the triggering signal of power input input is high level pulse, high level pulse makes the first switching tube conducting after current-limiting resistance R1, the conducting of cause the first switching tube makes the also conducting of second switch pipe, and by the positive feedback of positive feedback resistor R4, make the control end of the first switching tube maintain high level always, the conducting always of the first switching tube, the lumination of light emitting diode of photoelectrical coupler, the output conducting of photoelectrical coupler, realize the function of LED light fixture start, this circuit structure is simple, only need four resistance, two triodes and a photoelectrical coupler just can be realized, and cost is low.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a LED light fixture start control circuit, is characterized in that, described LED light fixture start control circuit comprises:
Current-limiting resistance R1, current-limiting resistance R2, current-limiting resistance R3, positive feedback resistor R4, the first switching tube, second switch pipe and photoelectrical coupler;
The first end of described current-limiting resistance R1 is as the input contact signalling source of LED light fixture start control circuit, the control end of described the first switching tube of the second termination of described current-limiting resistance R1, the input of described the first switching tube, output is connected between the anode of light-emitting diode of the first end of described current-limiting resistance R3 and described photoelectrical coupler, the control end of the described second switch pipe of the second termination of described current-limiting resistance R3, the input of described second switch pipe, output is connected between the first end of power supply and described positive feedback resistor R4, the control end of described the first switching tube of the second termination of described positive feedback resistor R4, described current-limiting resistance R2 is connected between the control end and power supply of described second switch pipe, the minus earth of the light-emitting diode of described photoelectrical coupler, the switch ends of the output termination LED light fixture of described photoelectrical coupler.
2. LED light fixture as claimed in claim 1 start control circuit, it is characterized in that, described the first switching tube adopts NPN type triode Q1, the control end that the base stage of described NPN type triode Q1 is the first switching tube, the collector electrode of described NPN type triode Q1 connects the first end of described current-limiting resistance R3, and the emitter of described triode Q1 connects the anode of the light-emitting diode of described photoelectrical coupler.
3. LED light fixture as claimed in claim 1 start control circuit, it is characterized in that, described second switch pipe adopts positive-negative-positive triode Q2, the control end that the base stage of described positive-negative-positive triode Q2 is the second switch pipe, the emitter of described positive-negative-positive triode Q2 connects power supply, and the collector electrode of described positive-negative-positive triode Q2 connects the first end of described positive feedback resistor R4.
4. LED light fixture as claimed in claim 1 start control circuit, it is characterized in that, described the first switching tube adopts N-type metal-oxide-semiconductor Q3, the control end that the grid of described N-type metal-oxide-semiconductor Q3 is the first switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q3 connects the first end of described current-limiting resistance R3, and the source electrode of described N-type metal-oxide-semiconductor Q3 connects the anode of the light-emitting diode of described photoelectrical coupler.
5. LED light fixture as claimed in claim 1 start control circuit, it is characterized in that, described second switch pipe adopts P type metal-oxide-semiconductor Q4, the control end that the grid of described P type metal-oxide-semiconductor Q4 is the second switch pipe, the source electrode of described P type metal-oxide-semiconductor Q4 connects power supply, and the drain electrode of described P type metal-oxide-semiconductor Q4 connects the first end of described positive feedback resistor R4.
6. a LED light fixture, is characterized in that, described LED light fixture comprises LED light fixture start control circuit, and described LED light fixture start control circuit comprises:
Current-limiting resistance R1, current-limiting resistance R2, current-limiting resistance R3, positive feedback resistor R4, the first switching tube, second switch pipe and photoelectrical coupler;
The first end of described current-limiting resistance R1 is as the input contact signalling source of LED light fixture start control circuit, the control end of described the first switching tube of the second termination of described current-limiting resistance R1, the input of described the first switching tube, output is connected between the anode of light-emitting diode of the first end of described current-limiting resistance R3 and described photoelectrical coupler, the control end of the described second switch pipe of the second termination of described current-limiting resistance R3, the input of described second switch pipe, output is connected between the first end of power supply and described positive feedback resistor R4, the control end of described the first switching tube of the second termination of described positive feedback resistor R4, described current-limiting resistance R2 is connected between the control end and power supply of described second switch pipe, the minus earth of the light-emitting diode of described photoelectrical coupler, the switch ends of the output termination LED light fixture of described photoelectrical coupler.
7. LED light fixture as claimed in claim 6, it is characterized in that, described the first switching tube adopts NPN type triode Q1, the control end that the base stage of described NPN type triode Q1 is the first switching tube, the collector electrode of described NPN type triode Q1 connects the first end of described current-limiting resistance R3, and the emitter of described triode Q1 connects the anode of the light-emitting diode of described photoelectrical coupler.
8. LED light fixture as claimed in claim 6, it is characterized in that, described second switch pipe adopts positive-negative-positive triode Q2, the control end that the base stage of described positive-negative-positive triode Q2 is the second switch pipe, the emitter of described positive-negative-positive triode Q2 connects power supply, and the collector electrode of described positive-negative-positive triode Q2 connects the first end of described positive feedback resistor R4.
9. LED light fixture as claimed in claim 6, it is characterized in that, described the first switching tube adopts N-type metal-oxide-semiconductor Q3, the control end that the grid of described N-type metal-oxide-semiconductor Q3 is the first switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q3 connects the first end of described current-limiting resistance R3, and the source electrode of described N-type metal-oxide-semiconductor Q3 connects the anode of the light-emitting diode of described photoelectrical coupler.
10. LED light fixture as claimed in claim 6, it is characterized in that, described second switch pipe adopts P type metal-oxide-semiconductor Q4, the control end that the grid of described P type metal-oxide-semiconductor Q4 is the second switch pipe, the source electrode of described P type metal-oxide-semiconductor Q4 connects power supply, and the drain electrode of described P type metal-oxide-semiconductor Q4 connects the first end of described positive feedback resistor R4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210172530.5A CN103458552B (en) | 2012-05-30 | 2012-05-30 | A kind of LED lamp and start control circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210172530.5A CN103458552B (en) | 2012-05-30 | 2012-05-30 | A kind of LED lamp and start control circuit thereof |
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| CN103458552A true CN103458552A (en) | 2013-12-18 |
| CN103458552B CN103458552B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210172530.5A Expired - Fee Related CN103458552B (en) | 2012-05-30 | 2012-05-30 | A kind of LED lamp and start control circuit thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104656480A (en) * | 2015-01-05 | 2015-05-27 | 广东金莱特电器股份有限公司 | Circuit controlled by light touch switch |
| CN107370483A (en) * | 2017-08-04 | 2017-11-21 | 深圳市嘉昱机电有限公司 | Pulse receiving circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2648705Y (en) * | 2003-08-23 | 2004-10-13 | 陈枚林 | Touch switch type electric appliance control protector |
| WO2010054523A1 (en) * | 2008-11-13 | 2010-05-20 | Shen Jinxiang | Combination of a drive power supply of high-power led lamp and matched lamps |
| CN101801128A (en) * | 2010-01-21 | 2010-08-11 | 海洋王照明科技股份有限公司 | Command marker lamp and LED control circuit thereof |
| CN201887735U (en) * | 2010-11-26 | 2011-06-29 | 陈清尧 | Time delay switch of bathroom exhaust fan |
| CN202095140U (en) * | 2011-05-17 | 2011-12-28 | 尹文庭 | Solution for working power source of two-wire system electronic switch |
-
2012
- 2012-05-30 CN CN201210172530.5A patent/CN103458552B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2648705Y (en) * | 2003-08-23 | 2004-10-13 | 陈枚林 | Touch switch type electric appliance control protector |
| WO2010054523A1 (en) * | 2008-11-13 | 2010-05-20 | Shen Jinxiang | Combination of a drive power supply of high-power led lamp and matched lamps |
| CN101801128A (en) * | 2010-01-21 | 2010-08-11 | 海洋王照明科技股份有限公司 | Command marker lamp and LED control circuit thereof |
| CN201887735U (en) * | 2010-11-26 | 2011-06-29 | 陈清尧 | Time delay switch of bathroom exhaust fan |
| CN202095140U (en) * | 2011-05-17 | 2011-12-28 | 尹文庭 | Solution for working power source of two-wire system electronic switch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104656480A (en) * | 2015-01-05 | 2015-05-27 | 广东金莱特电器股份有限公司 | Circuit controlled by light touch switch |
| CN104656480B (en) * | 2015-01-05 | 2017-09-19 | 广东金莱特电器股份有限公司 | A kind of touch switch controls circuit |
| CN107370483A (en) * | 2017-08-04 | 2017-11-21 | 深圳市嘉昱机电有限公司 | Pulse receiving circuit |
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| Publication number | Publication date |
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| CN103458552B (en) | 2016-03-30 |
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Granted publication date: 20160330 Termination date: 20200530 |