CN103293473A - Electronic switch detecting circuit applied to LED illuminating lamp - Google Patents
Electronic switch detecting circuit applied to LED illuminating lamp Download PDFInfo
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- CN103293473A CN103293473A CN2013102225768A CN201310222576A CN103293473A CN 103293473 A CN103293473 A CN 103293473A CN 2013102225768 A CN2013102225768 A CN 2013102225768A CN 201310222576 A CN201310222576 A CN 201310222576A CN 103293473 A CN103293473 A CN 103293473A
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Abstract
The invention discloses an electronic switch detecting circuit applied to an LED illuminating lamp. The electronic switch detecting circuit comprises an electronic switch, an LED as a load used in the LED illuminating lamp, a discharging access and a controlling and detecting module. During working, the controlling and detecting module can judge a current state of the electronic switch via detecting voltage change conditions of the discharging access during discharging and provide the current stage of the electronic switch to the LED, and then the LED enters a corresponding working state according to the current state of the electronic switch, so that twinkling of the LED as the load is avoided, and an operation range of the electronic switch detecting circuit is enlarged.
Description
Technical field
The present invention relates to the LED technical field of lamps, relate in particular to the electronic switch testing circuit in a kind of LED of being applied in lighting.
Background technology
Electronic switch utilization field continues to increase at present, but because the self character of electronic switch, it also has faint electric current " leakage " when disconnecting, and this " leakage " limited some utilization; Such as, using electronic switch at some light fixture, but electronic switch close current fully, these electric currents cause the light fixture also can Weak-luminescence or flicker when electronic switch disconnects.
With electronic switch control AC(alternating current) direct driving LED (Light Emitting Diode, light emitting diode) light fixture illustrates, suppose that electronic switch disconnects back, back circuit voltage from 0V, this moment, LED can't conducting, present high impedance, because leakage current is arranged, voltage constantly raises, be elevated to LED conducting behind the cut-in voltage of LED when voltage, can draw big electric current after the LED conducting, and electronic switch has only faint electric current to flow through in off-state, so voltage is dragged down after the LED conducting, voltage reduces back LED to be ended, and cut-off voltage raises again ... the phenomenon that has so just occurred the LED flicker repeatedly.
Summary of the invention
The objective of the invention is to provide at the deficiencies in the prior art the electronic switch testing circuit in a kind of LED of being applied in lighting, it is by identifying the current state of electronic switch to the electronic switch status detection, thereby control LED enters corresponding duty, avoid occurring as the LED of load the phenomenon of flicker, expanded the utilization scope of circuit.
To achieve these goals, the invention provides the electronic switch testing circuit in a kind of LED of being applied in lighting, comprise electronic switch, as LED, discharge path, control and detection module in the LED lighting of load, the input end of electronic switch is connected with power supply, the input end of the input end of discharge path, control and detection module, the input end of LED all are connected with the output terminal of electronic switch, the output terminal of the output terminal of discharge path, control and detection module, the equal ground connection of the output terminal of LED; The detection signal output terminal of discharge path is connected with the detection signal input end of control and detection module, makes control and detection module judge the state that electronic switch is current by detecting the change in voltage situation of discharge path in discharge process; The control signal output terminal of control and detection module is connected with the control signal input end of LED, makes control and the detection module state that electronic switch is current offer LED, enters corresponding duty by LED according to the current state of electronic switch.
Preferably, described control and detection module are that voltage triggered detects by discharge path to the mode of electronic switch state-detection.
Preferably, described control and detection module are regularly detection trigger by discharge path to the mode of electronic switch state-detection.
Beneficial effect of the present invention is: the present invention is applied in electronic switch testing circuit in the LED lighting in when work, control and detection module can be judged the state that electronic switch is current by detecting the change in voltage situation of discharge path in discharge process, control and the detection module state that electronic switch is current offer LED then, enter corresponding duty by LED according to the current state of electronic switch, avoid occurring as the LED of load the phenomenon of flicker, expanded the utilization scope of circuit.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is the change curve synoptic diagram of voltage V in electronic switch disconnection and discharge process of the output terminal of electronic switch of the present invention.
Fig. 3 is the change curve synoptic diagram of voltage V in electronic switch closes and discharge process of the output terminal of electronic switch of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Please refer to Fig. 1, the present invention is applied in the electronic switch testing circuit in the LED lighting, it comprises electronic switch 1, the LED2 as in the LED lighting of load, discharge path 3, control and detection module 4, the input end of electronic switch 1 is connected with power supply 5, the input end of the input end of discharge path 3, control and detection module 4, the input end of LED2 all are connected with the output terminal of electronic switch 1, the equal ground connection of output terminal (GND) of the output terminal of the output terminal of discharge path 3, control and detection module 4, LED2; The detection signal output terminal of discharge path 3 is connected with the detection signal input end of control and detection module 4, makes control and detection module 4 judge the current state of electronic switch 1 (disconnect or closed) by detecting the change in voltage situation of discharge path 3 in discharge process; The control signal output terminal of control and detection module 4 is connected with the control signal input end of LED2, makes control and detection module 4 that electronic switch 1 current state is offered LED2, enters corresponding duty by LED2 according to electronic switch 1 current state.
As can be seen from Figure 1, increase a discharge path 3 in electronic switch 1 back, if electronic switch 1 disconnects, so only having weak current flows through, discharge path 3 can make this part weak current absorption (by discharge) LED2 as load not be subjected to this part current affects so, avoids still Weak-luminescence or the flicker under the state that electronic switch 1 disconnects of LED2 light fixture; But if electronic switch 1 is closed, always working of discharge path 3 can a lot of power consumptions of waste.
Therefore, the present invention is provided with control and the detection module 4 for control discharge path 3 duties, be that load illustrates its principle of work with LED2: suppose that LED2 cut-in voltage as load is that the voltage of the output terminal of Vt, electronic switch 1 is V, then control and detection module 4 control discharge paths 3 discharge under the situation of voltage V less than | Vo|(|Vo|＜Vt), stop discharge after voltage V is greater than Vo.If electronic switch 1 disconnects, because the work of discharge path 3 makes V always less than Vo＜Vt, so LED2 can not work; If electronic switch 1 closure, loop can provide very strong electric current (much larger than the discharge current of discharge path 3) so V can raise greater than Vo, control this moment and detection module 4 control discharge paths 3 no longer discharge, also can operate as normal as the LED2 of load.
More particularly, as shown in Figures 2 and 3, the present invention is applied in the electronic switch testing circuit in the LED lighting, its concrete control procedure is as follows: suppose that the power supply 5 that electronic switch 1 connects is alternating currents, control and detection module 4 control discharge path 3 in the process that voltage V rises carries out the discharge of a short time, if electronic switch 1 disconnects, can not provide enough electric currents owing to electronic switch 1 during discharge, voltage V will be dragged down, and stops discharge, and voltage V gos up; If electronic switch 1 is closed, can provide enough electric currents in the circuit, discharge process can not influence the variation of voltage V substantially, thereby just can judge the current state of electronic switch 1 by detecting voltage V changing condition in the discharge process, this status signal is offered LED2 as load, LED2 just can enter corresponding duty according to electronic switch 1 current state, and discharge process only accounts for the extremely short time in each cycle, can not waste too many power consumption.
Wherein, control and detection module 4 mode by 3 pairs of electronic switch 1 state-detection of discharge path can detect for voltage triggered, detection trigger when namely voltage V rises to some values at every turn; Certainly, in actual applications, control and detection module 4 also can be other detection trigger mode by the mode of 3 pairs of electronic switch 1 state-detection of discharge path as required, for example: control and detection module 4 are regularly detection trigger by the mode of 3 pairs of electronic switch 1 state-detection of discharge path, namely by clock timing, per T detection interval time once.
Should be noted that at last; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although with reference to preferred embodiment the present invention has been done to explain; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement technical scheme of the present invention, and not break away from essence and the scope of technical solution of the present invention.
Claims (3)
1. electronic switch testing circuit that is applied in the LED lighting, comprise electronic switch, as the LED in the LED lighting of load, it is characterized in that: also comprise discharge path, control and detection module, the input end of electronic switch is connected with power supply, the input end of the input end of discharge path, control and detection module, the input end of LED all are connected with the output terminal of electronic switch, the output terminal of the output terminal of discharge path, control and detection module, the equal ground connection of the output terminal of LED; The detection signal output terminal of discharge path is connected with the detection signal input end of control and detection module, makes control and detection module judge the state that electronic switch is current by detecting the change in voltage situation of discharge path in discharge process; The control signal output terminal of control and detection module is connected with the control signal input end of LED, makes control and the detection module state that electronic switch is current offer LED, enters corresponding duty by LED according to the current state of electronic switch.
2. the electronic switch testing circuit that is applied in the LED lighting according to claim 1 is characterized in that: described control and detection module are that voltage triggered detects by discharge path to the mode of electronic switch state-detection.
3. the electronic switch testing circuit that is applied in the LED lighting according to claim 1 is characterized in that: described control and detection module are detection trigger regularly by discharge path to the mode of electronic switch state-detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310222576.8A CN103293473B (en) | 2013-06-06 | 2013-06-06 | A kind of electronic switch testing circuit be applied in LED illumination lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310222576.8A CN103293473B (en) | 2013-06-06 | 2013-06-06 | A kind of electronic switch testing circuit be applied in LED illumination lamp |
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| Publication Number | Publication Date |
|---|---|
| CN103293473A true CN103293473A (en) | 2013-09-11 |
| CN103293473B CN103293473B (en) | 2015-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310222576.8A Active CN103293473B (en) | 2013-06-06 | 2013-06-06 | A kind of electronic switch testing circuit be applied in LED illumination lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267721A (en) * | 2021-05-17 | 2021-08-17 | 吉林农业科技学院 | Electronic switch detection circuit applied to LED lighting lamp |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2924930Y (en) * | 2006-06-08 | 2007-07-18 | 北京玛德利智能电器有限公司 | Micr power consumption infrared sensor switch |
| JP2008211473A (en) * | 2007-02-26 | 2008-09-11 | Matsushita Electric Works Ltd | Automatic photoelectric flasher unit |
| US20090267520A1 (en) * | 2008-04-28 | 2009-10-29 | Koito Manufacturing Co., Ltd. | Lighting control device |
| CN101715261A (en) * | 2009-07-15 | 2010-05-26 | 深圳市泉芯电子技术有限公司 | Status switching circuit of LED controller |
| CN101848580A (en) * | 2010-05-17 | 2010-09-29 | 海洋王照明科技股份有限公司 | Led lamp control circuit and led lamp |
-
2013
- 2013-06-06 CN CN201310222576.8A patent/CN103293473B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2924930Y (en) * | 2006-06-08 | 2007-07-18 | 北京玛德利智能电器有限公司 | Micr power consumption infrared sensor switch |
| JP2008211473A (en) * | 2007-02-26 | 2008-09-11 | Matsushita Electric Works Ltd | Automatic photoelectric flasher unit |
| US20090267520A1 (en) * | 2008-04-28 | 2009-10-29 | Koito Manufacturing Co., Ltd. | Lighting control device |
| CN101715261A (en) * | 2009-07-15 | 2010-05-26 | 深圳市泉芯电子技术有限公司 | Status switching circuit of LED controller |
| CN101848580A (en) * | 2010-05-17 | 2010-09-29 | 海洋王照明科技股份有限公司 | Led lamp control circuit and led lamp |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267721A (en) * | 2021-05-17 | 2021-08-17 | 吉林农业科技学院 | Electronic switch detection circuit applied to LED lighting lamp |
| CN113267721B (en) * | 2021-05-17 | 2024-03-22 | 东莞市德崧电子有限公司 | Electronic switch detection circuit applied to LED illumination lamp |
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| Publication number | Publication date |
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| CN103293473B (en) | 2015-10-14 |
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Owner name: SHENZHEN BOYONG TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: DONGGUAN BOYONG TECHNOLOGY CO., LTD. Effective date: 20150604 |
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Effective date of registration: 20150604 Address after: 518054 Guangdong city of Shenzhen province Qianhai Shenzhen Hong Kong cooperation zone before Bay Road No. 1 building 201 room A (located in Shenzhen Qianhai business secretary Co. Ltd.) Applicant after: SHENZHEN BOYONG TECHNOLOGY CO., LTD. Address before: 523808 Guangdong province Dongguan City Songshan Lake Industrial Road, building 6 floor 2 Songhu branch Applicant before: Dongguan Boyong Electronic Technology Co., Ltd. |
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Effective date of registration: 20191031 Address after: Fengming street Tongxiang City Industrial Park, Jiaxing City, Zhejiang province 314500 Patentee after: ZHEJIANG HAOTING LIGHTING CO., LTD. Address before: 518054 Guangdong city of Shenzhen province Qianhai Shenzhen Hong Kong cooperation zone before Bay Road No. 1 building 201 room A (located in Shenzhen Qianhai business secretary Co. Ltd.) Patentee before: SHENZHEN BOYONG TECHNOLOGY CO., LTD. |
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