CN103458552B - A kind of LED lamp and start control circuit thereof - Google Patents

A kind of LED lamp and start control circuit thereof Download PDF

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Publication number
CN103458552B
CN103458552B CN201210172530.5A CN201210172530A CN103458552B CN 103458552 B CN103458552 B CN 103458552B CN 201210172530 A CN201210172530 A CN 201210172530A CN 103458552 B CN103458552 B CN 103458552B
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China
Prior art keywords
switching tube
current
limiting resistance
led lamp
switch pipe
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Expired - Fee Related
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CN201210172530.5A
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Chinese (zh)
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CN103458552A (en
Inventor
周明杰
管伟芳
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Priority to CN201210172530.5A priority Critical patent/CN103458552B/en
Publication of CN103458552A publication Critical patent/CN103458552A/en
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Abstract

The present invention is applicable to LED lamp control field, particularly relates to a kind of LED lamp and start control circuit thereof.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, because the conducting of the first switching tube makes the also conducting of second switch pipe, and pass through 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 first switching tube, the lumination of light emitting diode of photoelectrical coupler, the output conducting of photoelectrical coupler, realize the function of LED lamp start, this circuit structure is simple, only need four resistance, two triodes and a photoelectrical coupler just can realize, and cost is low.

Description

A kind of LED lamp and start control circuit thereof
Technical field
The invention belongs to LED lamp control field, particularly relate to a kind of LED lamp and start control circuit thereof.
Background technology
LED is called as forth generation lighting source or green light source, has the features 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 instruction, display, decoration, backlight, general lighting and urban landscape.
The switching on and shutting down of a lot of LED lamp are at present controlled by triggering level, and need to use now to maintain triggering level, general solution can adopt integrated circuit (IC) to do, but this resolution circuitry complex structure, and cost is higher.
Summary of the invention
The object of the present invention is to provide a kind of LED lamp start control circuit, be intended to solve present LED lamp start control circuit and there is complex structure, problem that cost is high.
The present invention is achieved in that a kind of LED lamp start control circuit, and described LED lamp 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 connects trigger signal source as the input of LED lamp start control circuit, the control end of the first switching tube described in second termination of described current-limiting resistance R1, the input of described first switching tube, output is connected between the anode of the first end of described current-limiting resistance R3 and the light-emitting diode of described photoelectrical coupler, the control end of second switch pipe described in 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 the first switching tube described in second termination of described positive feedback resistor R4, between the control end that described current-limiting resistance R2 is connected to described second switch pipe and power supply, the minus earth of the light-emitting diode of described photoelectrical coupler, the switch ends of the output termination LED lamp of described photoelectrical coupler.
Another object of the present invention is to provide a kind of LED lamp, described LED lamp comprises LED lamp start control circuit, and described LED lamp 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 connects trigger signal source as the input of LED lamp start control circuit, the control end of the first switching tube described in second termination of described current-limiting resistance R1, the input of described first switching tube, output is connected between the anode of the first end of described current-limiting resistance R3 and the light-emitting diode of described photoelectrical coupler, the control end of second switch pipe described in 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 the first switching tube described in second termination of described positive feedback resistor R4, between the control end that described current-limiting resistance R2 is connected to described second switch pipe and power supply, the minus earth of the light-emitting diode of described photoelectrical coupler, the switch ends of the output termination LED lamp 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, because the conducting of the first switching tube makes the also conducting of second switch pipe, and pass through 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 first switching tube, the lumination of light emitting diode of photoelectrical coupler, the output conducting of photoelectrical coupler, realize the function of LED lamp start, this circuit structure is simple, only need four resistance, two triodes and a photoelectrical coupler just can realize, and cost is low.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the LED lamp start control circuit that first embodiment of the invention provides;
Fig. 2 is the circuit structure diagram of the LED lamp start control circuit that second embodiment of the invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, 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, be not intended to limit the present invention.
Fig. 1 shows the circuit structure of the LED lamp start control circuit that first embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows.
LED lamp 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 connects trigger signal source as the input of LED lamp start control circuit, the control end of second termination first switching tube 100 of current-limiting resistance R1, the input of the first switching tube 100, output is connected between the anode of the first end of current-limiting resistance R3 and the light-emitting diode of 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 first switching tube 100 of positive feedback resistor R4, current-limiting resistance R2 is connected between the control end of second switch pipe 200 and power supply VCC, the minus earth of the light-emitting diode of photoelectrical coupler U1, the switch ends of the output termination LED lamp of photoelectrical coupler U1.
As one embodiment of the invention, first switching tube 100 adopts NPN type triode Q1, the base stage of NPN type triode Q1 is the control end of 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 PNP type triode Q2, the base stage of PNP type triode Q2 is the control end of second switch pipe 200, and the emitter of PNP type triode Q2 meets power supply VCC, and the collector electrode of PNP type triode Q2 connects the first end of positive feedback resistor R4.
Fig. 2 shows the circuit structure of the LED lamp start control circuit that second embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows.
As one embodiment of the invention, first switching tube 100 adopts N-type metal-oxide-semiconductor Q3, the grid of N-type metal-oxide-semiconductor Q3 is the control end of the first switching tube 100, and 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, and the grid of P type metal-oxide-semiconductor Q4 is the control end of 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 lamp adopting above-mentioned LED lamp start control circuit.
Adopt NPN type triode Q1 with the first switching tube 100 below, second switch pipe 200 adopts PNP type triode Q2 to be example, is described the operation principle of LED lamp start control circuit:
NPN type triode Q1 base stage is added on through current-limiting resistance R1 when there being high level pulse, 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 makes the base level of PNP type triode Q2 drag down, make PNP type triode Q2 also conducting, thus make the current collection of PNP type triode Q2 very high level by adding to the base stage of NPN type triode Q1 after 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, the also conducting always of light-emitting diode so in photoelectrical coupler U1, the output of photoelectrical coupler U1 closes, realize the function of LED lamp start, circuit just can be made to restore to the original state until supply voltage VCC disappears.
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, because the conducting of the first switching tube makes the also conducting of second switch pipe, and pass through 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 first switching tube, the lumination of light emitting diode of photoelectrical coupler, the output conducting of photoelectrical coupler, realize the function of LED lamp start, this circuit structure is simple, only need four resistance, two triodes and a photoelectrical coupler just can realize, and cost is low.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a LED lamp start control circuit, is characterized in that, described LED lamp 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 connects trigger signal source as the input of LED lamp start control circuit, the control end of the first switching tube described in second termination of described current-limiting resistance R1, the input of described first switching tube, output is connected between the anode of the first end of described current-limiting resistance R3 and the light-emitting diode of described photoelectrical coupler, the control end of second switch pipe described in 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 the first switching tube described in second termination of described positive feedback resistor R4, between the control end that described current-limiting resistance R2 is connected to described second switch pipe and power supply, the minus earth of the light-emitting diode of described photoelectrical coupler, the switch ends of the output termination LED lamp of described photoelectrical coupler,
The control end of the first switching tube is added on through current-limiting resistance R1 when there being high level pulse, first switching tube conducting, after first switching tube conducting, through current-limiting resistance R2, the dividing potential drop of current-limiting resistance R3 makes the control end level of second switch pipe drag down, make the also conducting of second switch pipe, thus make the input of second switch pipe be that high level is by adding to the control end of the first switching tube after positive feedback resistor R4 current limliting, make the base stage of the first switching tube maintain high level state always, first switching tube is just conducting always also, after high level pulse disappears, the first switching tube also maintains conducting, light-emitting diode so in photoelectrical coupler is conducting always also, the output of photoelectrical coupler U1 closes, realize the function of LED lamp start, circuit just can be made to restore to the original state until supply voltage VCC disappears.
2. LED lamp start control circuit as claimed in claim 1, it is characterized in that, described first switching tube adopts NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of 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 lamp start control circuit as claimed in claim 1, it is characterized in that, described second switch pipe adopts PNP type triode Q2, the base stage of described PNP type triode Q2 is the control end of second switch pipe, the emitter of described PNP type triode Q2 connects power supply, and the collector electrode of described PNP type triode Q2 connects the first end of described positive feedback resistor R4.
4. LED lamp start control circuit as claimed in claim 1, it is characterized in that, described first switching tube adopts N-type metal-oxide-semiconductor Q3, the grid of described N-type metal-oxide-semiconductor Q3 is the control end of 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 lamp start control circuit as claimed in claim 1, it is characterized in that, described second switch pipe adopts P type metal-oxide-semiconductor Q4, the grid of described P type metal-oxide-semiconductor Q4 is the control end of 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 lamp, is characterized in that, described LED lamp comprises LED lamp start control circuit, and described LED lamp 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 connects trigger signal source as the input of LED lamp start control circuit, the control end of the first switching tube described in second termination of described current-limiting resistance R1, the input of described first switching tube, output is connected between the anode of the first end of described current-limiting resistance R3 and the light-emitting diode of described photoelectrical coupler, the control end of second switch pipe described in 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 the first switching tube described in second termination of described positive feedback resistor R4, between the control end that described current-limiting resistance R2 is connected to described second switch pipe and power supply, the minus earth of the light-emitting diode of described photoelectrical coupler, the switch ends of the output termination LED lamp of described photoelectrical coupler,
The control end of the first switching tube is added on through current-limiting resistance R1 when there being high level pulse, first switching tube conducting, after first switching tube conducting, through current-limiting resistance R2, the dividing potential drop of current-limiting resistance R3 makes the control end level of second switch pipe drag down, make the also conducting of second switch pipe, thus make the input of second switch pipe be that high level is by adding to the control end of the first switching tube after positive feedback resistor R4 current limliting, make the base stage of the first switching tube maintain high level state always, first switching tube is just conducting always also, after high level pulse disappears, the first switching tube also maintains conducting, light-emitting diode so in photoelectrical coupler is conducting always also, the output of photoelectrical coupler U1 closes, realize the function of LED lamp start, circuit just can be made to restore to the original state until supply voltage VCC disappears.
7. LED lamp as claimed in claim 6, it is characterized in that, described first switching tube adopts NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of 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 lamp as claimed in claim 6, it is characterized in that, described second switch pipe adopts PNP type triode Q2, the base stage of described PNP type triode Q2 is the control end of second switch pipe, the emitter of described PNP type triode Q2 connects power supply, and the collector electrode of described PNP type triode Q2 connects the first end of described positive feedback resistor R4.
9. LED lamp as claimed in claim 6, it is characterized in that, described first switching tube adopts N-type metal-oxide-semiconductor Q3, the grid of described N-type metal-oxide-semiconductor Q3 is the control end of 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 lamp as claimed in claim 6, it is characterized in that, described second switch pipe adopts P type metal-oxide-semiconductor Q4, the grid of described P type metal-oxide-semiconductor Q4 is the control end of 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.
CN201210172530.5A 2012-05-30 2012-05-30 A kind of LED lamp and start control circuit thereof Expired - Fee Related CN103458552B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (5)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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

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