CN103179724A - LED (light emitting diode) single-key switch control circuit and LED lighting - Google Patents
LED (light emitting diode) single-key switch control circuit and LED lighting Download PDFInfo
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- CN103179724A CN103179724A CN2011104346310A CN201110434631A CN103179724A CN 103179724 A CN103179724 A CN 103179724A CN 2011104346310 A CN2011104346310 A CN 2011104346310A CN 201110434631 A CN201110434631 A CN 201110434631A CN 103179724 A CN103179724 A CN 103179724A
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Abstract
The invention is applicable to the LED lighting circuit field, and particularly relates to an LED single-key switch control circuit and an LED lighting. In an embodiment of the invention, the LED single-key switch control circuit is simple, reliable, low-cost and stable in operation. When connected, the LED single-key switch control circuit cannot generate a heavy instantaneous current, thereby avoiding sparkling, oxidation, bad contact and the like; further, the LED single-key switch control circuit has a far better reliability than a mechanical switch and is particularly applicable to small electronic products.
Description
Technical field
The invention belongs to LED lamp circuit field, relate in particular to a kind of LED single-button on-off control circuit and LED light fixture.
Background technology
LED is as new type light source, and it has energy-saving and environmental protection, characteristics efficiently, and technology is ripe and be applied to every field, and LED is widely used as lighting source.
At present a lot of electronic products comprise that the LED light fixture carries out direct switch with mechanical switch to power supply and controls, because mechanical switch can produce very large immediate current when connecting, the contact of switch shrapnel easily produces sparking, sparking also just easily makes contact oxidation cause the mechanical switch loose contact, may cause the disabler of mechanical switch.
Summary of the invention
The object of the present invention is to provide a kind of LED single-button on-off control circuit, be intended to solve the mechanical switch of present control LED light fixture because the phenomenon of contact sparking can occur, and have the problem of disabler.
The present invention is achieved in that a kind of LED single-button on-off control circuit, connects respectively power supply and LED lamp, and described LED single-button on-off control circuit comprises:
Positive feedback resistor R1, discharge and recharge resistance R 2, divider resistance R3, current-limiting resistance R4, storage capacitor C1, key switch S1, switching tube, not gate U1A, not gate U1B and not gate U1C;
the positive pole of the first described power supply of termination of described current-limiting resistance R4, the positive pole of the second described LED lamp of termination of described current-limiting resistance R4, the input of described switching tube and output are connected in turn between the negative pole and ground of described LED lamp, the input of the described not gate U1B of output termination of described not gate U1A, the output of described not gate U1B discharges and recharges by described the input that resistance R 2 meets described not gate U1C, described key switch S1 is connected between the output of the input of described not gate U1A and described not gate U1C, described positive feedback resistor R1 is connected between the output of the input of described not gate U1A and described not gate U1B, the output of described not gate U1B connects the control end of described switching tube by described divider resistance R3, described storage capacitor C1 is connected between the input and ground of described not gate U1C.
Another object of the present invention is to provide a kind of LED light fixture, comprise the LED single-button on-off control circuit, described LED single-button on-off control circuit connects respectively power supply and LED lamp, and described LED single-button on-off control circuit comprises:
Positive feedback resistor R1, discharge and recharge resistance R 2, divider resistance R3, current-limiting resistance R4, storage capacitor C1, key switch S1, switching tube, not gate U1A, not gate U1B and not gate U1C;
the positive pole of the first described power supply of termination of described current-limiting resistance R4, the positive pole of the second described LED lamp of termination of described current-limiting resistance R4, the input of described switching tube and output are connected in turn between the negative pole and ground of described LED lamp, the input of the described not gate U1B of output termination of described not gate U1A, the output of described not gate U1B discharges and recharges by described the input that resistance R 2 meets described not gate U1C, described key switch S1 is connected between the output of the input of described not gate U1A and described not gate U1C, described positive feedback resistor R1 is connected between the output of the input of described not gate U1A and described not gate U1B, the output of described not gate U1B connects the control end of described switching tube by described divider resistance R3, described storage capacitor C1 is connected between the input and ground of described not gate U1C.
In the present invention, this LED single-button on-off control circuit is simple and reliable for structure, cost is low, working stability, this LED single-button on-off control circuit can not produce very large immediate current when connecting, therefore just can not produce the phenomenons such as sparking, oxidation, loose contact, its reliability far is better than mechanical switch, and the spy is applicable to small-sized electronic product.
Description of drawings
Fig. 1 is the circuit structure diagram of the LED single-button on-off control circuit that provides of first embodiment of the invention;
Fig. 2 is the circuit structure diagram of the LED single-button on-off 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 single-button on-off 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.
A kind of LED single-button on-off control circuit meets respectively power supply BT1 and LED lamp D1, and the LED single-button on-off control circuit comprises:
Positive feedback resistor R1, discharge and recharge resistance R 2, divider resistance R3, current-limiting resistance R4, storage capacitor C1, key switch S1, switching tube 100, not gate U1A, not gate U1B and not gate U1C;
the positive pole of the first termination power BT1 of current-limiting resistance R4, the positive pole of the second termination LED lamp D1 of current-limiting resistance R4, the input of switching tube 100 and output are connected in turn between the negative pole and ground of LED lamp D1, the input of the output termination not gate U1B of not gate U1A, the output of not gate U1B connects the input of not gate U1C by discharging and recharging resistance R 2, key switch S1 is connected between the output of the input of not gate U1A and not gate U1C, positive feedback resistor R1 is connected between the output of the input of not gate U1A and not gate U1B, the output of not gate U1B connects the control end of switching tube 100 by divider resistance R3, storage capacitor C1 is connected between the input and ground of not gate U1C.
As one embodiment of the invention, switching tube 100 adopts NPN type triode Q1, and the base stage of NPN type triode Q1 is the control end of switching tube 100, and the collector electrode of NPN type triode Q1 connects the negative pole of LED lamp D1, the grounded emitter of NPN type triode Q1.
Fig. 2 shows the circuit structure of the LED single-button on-off 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, switching tube 100 adopts N-type metal-oxide-semiconductor Q2, and the grid of N-type metal-oxide-semiconductor Q2 is the control end of switching tube 100, and the drain electrode of N-type metal-oxide-semiconductor Q2 connects the negative pole of LED lamp D1, the source ground of N-type metal-oxide-semiconductor Q2.
The embodiment of the present invention also provides a kind of LED light fixture, comprises the LED single-button on-off control circuit, and the LED single-button on-off control circuit meets respectively power supply BT1 and LED lamp D1, and as shown in figure one, the LED single-button on-off control circuit comprises:
Positive feedback resistor R1, discharge and recharge resistance R 2, divider resistance R3, current-limiting resistance R4, storage capacitor C1, key switch S1, switching tube 100, not gate U1A, not gate U1B and not gate U1C;
the positive pole of the first termination power BT1 of current-limiting resistance R4, the positive pole of the second termination LED lamp D1 of current-limiting resistance R4, the input of switching tube 100 and output are connected in turn between the negative pole and ground of LED lamp D1, the input of the output termination not gate U1B of not gate U1A, the output of not gate U1B connects the input of not gate U1C by discharging and recharging resistance R 2, key switch S1 is connected between the output of the input of not gate U1A and not gate U1C, positive feedback resistor R1 is connected between the output of the input of not gate U1A and not gate U1B, the output of not gate U1B connects the control end of switching tube 100 by divider resistance R3, storage capacitor C1 is connected between the input and ground of not gate U1C.
As shown in figure two, as one embodiment of the invention, switching tube 100 adopts N-type metal-oxide-semiconductor Q2, and the grid of N-type metal-oxide-semiconductor Q2 is the control end of switching tube 100, and the drain electrode of N-type metal-oxide-semiconductor Q2 connects the negative pole of LED lamp D1, the source ground of N-type metal-oxide-semiconductor Q2.
The below adopts NPN type triode Q1 as example take switching tube 100, and the operation principle of LED single-button on-off control circuit is described:
Static analysis: after circuit is connected with the mains the BT1 power supply, because the voltage of storage capacitor C1 can not suddenly change, therefore the input terminal voltage of not gate U1C is low level, the output end voltage of not gate U1B is similarly low level, this moment, NPN type triode Q1 was in cut-off state, and LED lamp D1 closes.
conducting is analyzed: the input terminal voltage of not gate U1C is that to cause its output end voltage be high level to low level, when pushing button switch S 1, the high level of not gate U1C output is to the input of not gate U1A, making the output of not gate U1A and the input of not gate U1B is low level, and the output of not gate U1B is high level, the high level of the output of not gate U1B feeds back to the input of not gate U1A by positive feedback resistor R1, form positive feedback, make the output of not gate U1B keep high level output always, make NPN type triode Q1 conducting by divider resistance R3, LED lamp D1 lights, the control that the circuit realization is opened.
cut-off is analyzed: when the output of not gate U1B is kept high level, charge to storage capacitor C1 by discharging and recharging resistance R 2, the input terminal voltage of not gate U1C becomes high level gradually by low level, make the output end voltage of not gate U1C change low level into, when again pushing button switch S 1, the input of not gate U1C is low level, the output of same not gate U1A and the input of not gate U1B are high level, the output of not gate U1B is low level and keeps low level by positive feedback resistor R1 positive feedback, make NPN type triode Q1 cut-off by divider resistance R3, LED lamp D1 extinguishes, realize closing function.The output of not gate U1B is that low level makes storage capacitor C1 discharge simultaneously, and the output that makes again not gate U1C is high level, and is ready for realizing opening of next time.Realized like this function of one-key switch.
In embodiments of the present invention, this LED single-button on-off control circuit is simple and reliable for structure, cost is low, working stability, this LED single-button on-off control circuit can not produce very large immediate current when connecting, therefore just can not produce the phenomenons such as sparking, oxidation, loose contact, its reliability far is better than mechanical switch, and the spy is applicable to small-sized electronic product.
The above is only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. a LED single-button on-off control circuit, connect respectively power supply and LED lamp, it is characterized in that, described LED single-button on-off control circuit comprises:
Positive feedback resistor R1, discharge and recharge resistance R 2, divider resistance R3, current-limiting resistance R4, storage capacitor C1, key switch S1, switching tube, not gate U1A, not gate U1B and not gate U1C;
the positive pole of the first described power supply of termination of described current-limiting resistance R4, the positive pole of the second described LED lamp of termination of described current-limiting resistance R4, the input of described switching tube and output are connected in turn between the negative pole and ground of described LED lamp, the input of the described not gate U1B of output termination of described not gate U1A, the output of described not gate U1B discharges and recharges by described the input that resistance R 2 meets described not gate U1C, described key switch S1 is connected between the output of the input of described not gate U1A and described not gate U1C, described positive feedback resistor R1 is connected between the output of the input of described not gate U1A and described not gate U1B, the output of described not gate U1B connects the control end of described switching tube by described divider resistance R3, described storage capacitor C1 is connected between the input and ground of described not gate U1C.
2. LED single-button on-off control circuit as claimed in claim 1, it is characterized in that, described switching tube adopts NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of switching tube, the collector electrode of described NPN type triode Q1 connects the negative pole of described LED lamp, the grounded emitter of described NPN type triode Q1.
3. LED single-button on-off control circuit as claimed in claim 1, it is characterized in that, described switching tube adopts N-type metal-oxide-semiconductor Q2, and the grid of described N-type metal-oxide-semiconductor Q2 is the control end of switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q2 connects the negative pole of described LED lamp, the source ground of described N-type metal-oxide-semiconductor Q2.
4. a LED light fixture, comprise the LED single-button on-off control circuit, and described LED single-button on-off control circuit connects respectively power supply and LED lamp, it is characterized in that, described LED single-button on-off control circuit comprises:
Positive feedback resistor R1, discharge and recharge resistance R 2, divider resistance R3, current-limiting resistance R4, storage capacitor C1, key switch S1, switching tube, not gate U1A, not gate U1B and not gate U1C;
the positive pole of the first described power supply of termination of described current-limiting resistance R4, the positive pole of the second described LED lamp of termination of described current-limiting resistance R4, the input of described switching tube and output are connected in turn between the negative pole and ground of described LED lamp, the input of the described not gate U1B of output termination of described not gate U1A, the output of described not gate U1B discharges and recharges by described the input that resistance R 2 meets described not gate U1C, described key switch S1 is connected between the output of the input of described not gate U1A and described not gate U1C, described positive feedback resistor R1 is connected between the output of the input of described not gate U1A and described not gate U1B, the output of described not gate U1B connects the control end of described switching tube by described divider resistance R3, described storage capacitor C1 is connected between the input and ground of described not gate U1C.
5. LED light fixture as claimed in claim 4, it is characterized in that, described switching tube adopts NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of switching tube, the collector electrode of described NPN type triode Q1 connects the negative pole of described LED lamp, the grounded emitter of described NPN type triode Q1.
6. LED light fixture as claimed in claim 4, it is characterized in that, described switching tube adopts N-type metal-oxide-semiconductor Q2, and the grid of described N-type metal-oxide-semiconductor Q2 is the control end of switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q2 connects the negative pole of described LED lamp, the source ground of described N-type metal-oxide-semiconductor Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110434631.0A CN103179724B (en) | 2011-12-22 | 2011-12-22 | LED (light emitting diode) single-key switch control circuit and LED lighting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110434631.0A CN103179724B (en) | 2011-12-22 | 2011-12-22 | LED (light emitting diode) single-key switch control circuit and LED lighting |
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| Publication Number | Publication Date |
|---|---|
| CN103179724A true CN103179724A (en) | 2013-06-26 |
| CN103179724B CN103179724B (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110434631.0A Expired - Fee Related CN103179724B (en) | 2011-12-22 | 2011-12-22 | LED (light emitting diode) single-key switch control circuit and LED lighting |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4041331A (en) * | 1974-08-23 | 1977-08-09 | Fmc Corporation | Solid state relay circuit |
| CN2109682U (en) * | 1991-09-14 | 1992-07-08 | 周志强 | Optical control switch for passageway lamp |
| CN2506022Y (en) * | 2001-08-15 | 2002-08-14 | 罗建安 | Wall switch |
| US6829449B2 (en) * | 2002-09-17 | 2004-12-07 | Hitachi Printing Solutions, Ltd. | Image forming apparatus with transfer bias inverting function |
| CN101877582A (en) * | 2010-06-22 | 2010-11-03 | 海洋王照明科技股份有限公司 | Single-button on-off control circuit |
-
2011
- 2011-12-22 CN CN201110434631.0A patent/CN103179724B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4041331A (en) * | 1974-08-23 | 1977-08-09 | Fmc Corporation | Solid state relay circuit |
| CN2109682U (en) * | 1991-09-14 | 1992-07-08 | 周志强 | Optical control switch for passageway lamp |
| CN2506022Y (en) * | 2001-08-15 | 2002-08-14 | 罗建安 | Wall switch |
| US6829449B2 (en) * | 2002-09-17 | 2004-12-07 | Hitachi Printing Solutions, Ltd. | Image forming apparatus with transfer bias inverting function |
| CN101877582A (en) * | 2010-06-22 | 2010-11-03 | 海洋王照明科技股份有限公司 | Single-button on-off control circuit |
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| CN103179724B (en) | 2015-04-29 |
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