CN204190997U - A kind of LED pulse detection drive system - Google Patents
A kind of LED pulse detection drive system Download PDFInfo
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- CN204190997U CN204190997U CN201420635270.5U CN201420635270U CN204190997U CN 204190997 U CN204190997 U CN 204190997U CN 201420635270 U CN201420635270 U CN 201420635270U CN 204190997 U CN204190997 U CN 204190997U
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Abstract
The utility model discloses a kind of LED pulse detection drive system, it is primarily of transformer T, current rectifying and wave filtering circuit, LED drive circuit, and voltage stabilizing circuit composition; The input of described current rectifying and wave filtering circuit is connected with the secondary of transformer T, and the input of voltage stabilizing circuit is connected with the output of LED drive circuit, it is characterized in that: between LED drive circuit and current rectifying and wave filtering circuit, be also provided with impulse hits testing circuit; Described impulse hits testing circuit by detection chip U1, triode VT1, the compositions such as the resistance R1 that one end is connected with the VCC pin of detection chip U1, the other end is connected with the base stage of triode VT1.Whether city's electric pulse that the utility model can detect input has mistake, and can adjust mistake, makes whole drive system more stable, thus extends the useful life of LED.
Description
Technical field
The utility model relates to a kind of electronic system, specifically refers to a kind of LED pulse detection drive system.
Background technology
LED, as novel energy-conserving light source, with its environmental protection, the feature such as energy-conservation, the life-span is long, volume is little, is extensively received by people and adopts.Due to the semiconductor device that LED is characteristic sensitivity, have negative temperature characteristic again, therefore in application process, LED drive system plays considerable effect for impelling LED to be in stable, reliable operating state.
But because of various reason, civil power there will be unstable situation unavoidably, the pulse signal being at this moment input to LED drive system from civil power very likely goes wrong, and this not only can affect the stability that LED uses, and also can have influence on the useful life of LED.
Utility model content
The purpose of this utility model is that overcoming current LED drive system paired pulses does not have measuring ability, affects the defect of the normal use of LED, provides a kind of LED pulse detection drive system that can detect city's electric pulse of input.
The purpose of this utility model is achieved through the following technical solutions: a kind of LED pulse detection drive system, and it is primarily of transformer T, current rectifying and wave filtering circuit, LED drive circuit, and voltage stabilizing circuit composition; The input of described current rectifying and wave filtering circuit is connected with the secondary of transformer T, and the input of voltage stabilizing circuit is connected with the output of LED drive circuit.Meanwhile, between LED drive circuit and current rectifying and wave filtering circuit, impulse hits testing circuit is also provided with; Described impulse hits testing circuit is by detection chip U1, triode VT1, the resistance R1 that one end is connected with the VCC pin of detection chip U1, the other end is connected with the base stage of triode VT1, the resistance R2 that one end is connected with the emitter of triode VT1, the other end is connected with DIS pin with the THRE pin of detection chip U1 simultaneously, positive pole is connected with the RESET pin of detection chip U1 after resistance R3, the polar capacitor C2 of minus earth, and positive pole is connected with the CONT pin of detection chip U1, the polar capacitor C3 of minus earth forms; The VCC pin of described detection chip U1 is connected with current rectifying and wave filtering circuit, and its DIS pin is all connected with the positive pole of polar capacitor C2 with TRI pin, and OUT pin is connected with LED drive circuit, GND pin ground connection; The grounded collector of described triode VT1.
Further, described current rectifying and wave filtering circuit is made up of diode bridge rectifier U and polar capacitor C1; Two inputs of diode bridge rectifier U are connected with non-same polarity with the Same Name of Ends of transformer T secondary respectively, and the positive and negative electrode of polar capacitor C1 is connected with two outputs of diode bridge rectifier U respectively; Meanwhile, the positive pole of polar capacitor C1 is connected with LED drive circuit, its negative pole is then connected with the VCC pin of detection chip U1.
Described LED drive circuit is by driving chip U2, triode VT2, the diode D1 that N pole is connected with the collector electrode of triode VT2, P pole is connected with voltage stabilizing circuit with the OUT pin of detection chip U1 simultaneously, and one end is connected with the GND pin of driving chip U2, the resistance R4 of other end ground connection forms; The base stage of described triode VT2 is connected with the OUT pin of detection chip U1 with the IB pin of driving chip U2 simultaneously, and its emitter is then connected with the OB pin of driving chip U2; The VCC pin of driving chip U2 is connected with voltage stabilizing circuit with the positive pole of polar capacitor C1 simultaneously, and its IB pin is also connected with VCC pin, and IA pin is then connected with voltage stabilizing circuit.
Described voltage stabilizing circuit comprises polar capacitor C4, resistance R5, voltage stabilizing didoe D2 and LED group; The P pole of voltage stabilizing didoe D2 is connected with its N pole after polar capacitor C4 through resistance R5, and the P pole of this voltage stabilizing didoe D2 is also connected with the IA pin of driving chip U2 with the P pole of diode D1 simultaneously, resistance R5 is then connected with the VCC pin of driving chip U2 with the tie point of polar capacitor C4; Described LED group is then serially connected between polar capacitor C4 and voltage stabilizing didoe D2.
The utility model comparatively prior art is compared and is had the following advantages and beneficial effect:
(1) whether city's electric pulse that impulse hits testing circuit of the present utility model can detect input has mistake, and can adjust mistake, makes whole drive system more stable, thus extends the useful life of LED.
(2) the utility model makes structure simple, be applicable to family and use, and cost is lower.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment
As shown in Figure 1, LED pulse detection drive system described in the utility model, it mainly comprises the transformer T for adjusting line voltage, current rectifying and wave filtering circuit, LED drive circuit, and voltage stabilizing circuit.The input of described current rectifying and wave filtering circuit is connected with the secondary of transformer T, and the input of voltage stabilizing circuit is connected with the output of LED drive circuit.Meanwhile, between LED drive circuit and current rectifying and wave filtering circuit, impulse hits testing circuit is also provided with.
This impulse hits testing circuit is by detection chip U1, and triode VT1, resistance R1, resistance R2, resistance R3, polar capacitor C2, polar capacitor C3 form.During connection, one end of resistance R1 is connected with the VCC pin of detection chip U1, the other end is connected with the base stage of triode VT1; One end of resistance R2 is connected with the emitter of triode VT1, the other end is connected with DIS pin with the THRE pin of detection chip U1 simultaneously.
The positive pole of polar capacitor C2 is connected with the RESET pin of detection chip U1 after resistance R3, its minus earth; The positive pole of polar capacitor C3 is connected with the CONT pin of detection chip U1, its minus earth.The VCC pin of described detection chip U1 is connected with current rectifying and wave filtering circuit, and its DIS pin is all connected with the positive pole of polar capacitor C2 with TRI pin, and OUT pin is connected with LED drive circuit, GND pin ground connection.Meanwhile, the grounded collector of described triode VT1.
Impulse hits testing circuit can detect city's electric pulse of input, and detect it and whether there is mistake, if anything is wrong then can be corrected automatically, thus makes the stability of system higher.In order to better realize implementation result, this detection chip U1 preferably adopts NE555 chip to realize.
Current rectifying and wave filtering circuit is made up of diode bridge rectifier U and polar capacitor C1.Two inputs of diode bridge rectifier U are connected with non-same polarity with the Same Name of Ends of the secondary coil of transformer T respectively, the positive pole of polar capacitor C1 is then connected with two outputs of diode bridge rectifier U respectively with negative pole, and the primary coil of transformer T is then as the input of electric current.
Meanwhile, the positive pole of this polar capacitor C1 is also connected with LED drive circuit, and its negative pole is then connected with the VCC pin of detection chip U1.
Be provided with LED drive circuit in system, it is by driving chip U2, triode VT2, resistance R4, and diode D1 forms.During connection, the N pole of diode D1 is connected with the collector electrode of triode VT2, and its P pole is connected with voltage stabilizing circuit with the OUT pin of detection chip U1 simultaneously, and one end of resistance R4 is connected with the GND pin of driving chip U2, its other end ground connection.
The base stage of described triode VT2 is connected with the OUT pin of detection chip U1 with the IB pin of driving chip U2 simultaneously, and its emitter is then connected with the OB pin of driving chip U2.The VCC pin of driving chip U2 is connected with voltage stabilizing circuit with the positive pole of polar capacitor C1 simultaneously, and its IB pin is also connected with VCC pin, and IA pin is then connected with voltage stabilizing circuit.
Voltage stabilizing circuit is used for further regulated output voltage, and it comprises polar capacitor C4, resistance R5, voltage stabilizing didoe D2 and LED group.The P pole of voltage stabilizing didoe D2 is connected with its N pole after polar capacitor C4 through resistance R5; The P pole of described voltage stabilizing didoe D2 is also connected with the IA pin of driving chip U2 with the P pole of diode D1 simultaneously, and resistance R5 is then connected with the VCC pin of driving chip U2 with the tie point of polar capacitor C4.Described LED group is then serially connected between polar capacitor C4 and voltage stabilizing didoe D2.During work, civil power is successively through transformer T, current rectifying and wave filtering circuit, impulse hits testing circuit, drive circuit, and lights this LED group after voltage stabilizing circuit.
For guaranteeing result of use of the present utility model, the AT90CAN128 cake core that this driving chip U2 preferentially adopts ATMEAL company to produce realizes.
As mentioned above, just the utility model can well be realized.
Claims (4)
1. a LED pulse detection drive system, it is primarily of transformer T, current rectifying and wave filtering circuit, LED drive circuit, and voltage stabilizing circuit composition; The input of described current rectifying and wave filtering circuit is connected with the secondary of transformer T, and the input of voltage stabilizing circuit is connected with the output of LED drive circuit, it is characterized in that: between LED drive circuit and current rectifying and wave filtering circuit, be also provided with impulse hits testing circuit; Described impulse hits testing circuit is by detection chip U1, triode VT1, the resistance R1 that one end is connected with the VCC pin of detection chip U1, the other end is connected with the base stage of triode VT1, the resistance R2 that one end is connected with the emitter of triode VT1, the other end is connected with DIS pin with the THRE pin of detection chip U1 simultaneously, positive pole is connected with the RESET pin of detection chip U1 after resistance R3, the polar capacitor C2 of minus earth, and positive pole is connected with the CONT pin of detection chip U1, the polar capacitor C3 of minus earth forms; The VCC pin of described detection chip U1 is connected with current rectifying and wave filtering circuit, and its DIS pin is all connected with the positive pole of polar capacitor C2 with TRI pin, and OUT pin is connected with LED drive circuit, GND pin ground connection; The grounded collector of described triode VT1.
2. a kind of LED pulse detection drive system according to claim 1, is characterized in that: described current rectifying and wave filtering circuit is made up of diode bridge rectifier U and polar capacitor C1; Two inputs of diode bridge rectifier U are connected with non-same polarity with the Same Name of Ends of transformer T secondary respectively, and the positive and negative electrode of polar capacitor C1 is connected with two outputs of diode bridge rectifier U respectively; Meanwhile, the positive pole of polar capacitor C1 is connected with LED drive circuit, its negative pole is then connected with the VCC pin of detection chip U1.
3. a kind of LED pulse detection drive system according to claim 2, it is characterized in that: described LED drive circuit is by driving chip U2, triode VT2, the diode D1 that N pole is connected with the collector electrode of triode VT2, P pole is connected with voltage stabilizing circuit with the OUT pin of detection chip U1 simultaneously, and one end is connected with the GND pin of driving chip U2, the resistance R4 of other end ground connection forms; The base stage of described triode VT2 is connected with the OUT pin of detection chip U1 with the IB pin of driving chip U2 simultaneously, and its emitter is then connected with the OB pin of driving chip U2; The VCC pin of driving chip U2 is connected with voltage stabilizing circuit with the positive pole of polar capacitor C1 simultaneously, and its IB pin is also connected with VCC pin, and IA pin is then connected with voltage stabilizing circuit.
4. a kind of LED pulse detection drive system according to claim 3, is characterized in that: described voltage stabilizing circuit comprises polar capacitor C4, resistance R5, voltage stabilizing didoe D2 and LED group; The P pole of voltage stabilizing didoe D2 is connected with its N pole after polar capacitor C4 through resistance R5, and the P pole of this voltage stabilizing didoe D2 is also connected with the IA pin of driving chip U2 with the P pole of diode D1 simultaneously, resistance R5 is then connected with the VCC pin of driving chip U2 with the tie point of polar capacitor C4; Described LED group is then serially connected between polar capacitor C4 and voltage stabilizing didoe D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420635270.5U CN204190997U (en) | 2014-10-29 | 2014-10-29 | A kind of LED pulse detection drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420635270.5U CN204190997U (en) | 2014-10-29 | 2014-10-29 | A kind of LED pulse detection drive system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204190997U true CN204190997U (en) | 2015-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420635270.5U Expired - Fee Related CN204190997U (en) | 2014-10-29 | 2014-10-29 | A kind of LED pulse detection drive system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204190997U (en) |
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2014
- 2014-10-29 CN CN201420635270.5U patent/CN204190997U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING XINGGUANG CENTURY LIGHTING TECHNOLOGY CO., Free format text: FORMER OWNER: CHENGDU SHIRUIDA TECHNOLOGY CO., LTD. Effective date: 20150624 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Jianghua Inventor before: Zhou Xiaoling |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHOU XIAOLING TO: CHEN JIANGHUA |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150624 Address after: 100122 805A Automotive Building, 2 East Third Ring Road, Beijing, Chaoyang District, Beijing Patentee after: Beijing Xingguang Century Lighting Technology Co., Ltd. Address before: 611800, Sichuan, Dujiangyan City, Chengdu Happy Town Union Village four sets of Tianlun holiday apartment, a period of 1, 1, 5 Patentee before: CHENGDU SHIRUIDA TECHNOLOGY CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150304 Termination date: 20171029 |