CN103293473B - A kind of electronic switch testing circuit be applied in LED illumination lamp - Google Patents
A kind of electronic switch testing circuit be applied in LED illumination lamp Download PDFInfo
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- CN103293473B CN103293473B CN201310222576.8A CN201310222576A CN103293473B CN 103293473 B CN103293473 B CN 103293473B CN 201310222576 A CN201310222576 A CN 201310222576A CN 103293473 B CN103293473 B CN 103293473B
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Abstract
The invention discloses a kind of electronic switch testing circuit be applied in LED illumination lamp, it comprises electronic switch, as the LED in the LED illumination lamp of load, discharge path, control and detection module, operationally, control and detection module can judge by the change in voltage situation of detection discharge path in discharge process the state that electronic switch is current, then state current for electronic switch is supplied to LED by control and detection module, corresponding duty is entered according to the current state of electronic switch by LED, the LED as load is avoided to occur the phenomenon of flicker, extend the operation strategies of circuit.
Description
Technical field
The present invention relates to LED lamp technical field, particularly relate to a kind of electronic switch testing circuit be applied in LED illumination lamp.
Background technology
The current electronic switch field that uses continues to increase, but due to the self character of electronic switch, it also has faint electric current " leakages " when disconnecting, and this " leakage " limits some utilization; Such as, some light fixture uses electronic switch, but electronic switch cannot close current completely, these electric currents cause light fixture also can Weak-luminescence or flicker when electronic switch disconnects.
With electronic switch control AC(alternating current) Direct driver LED(Light EmittingDiode, light emitting diode) light fixture illustrate, after supposing electronic switch disconnection, circuit voltage is from 0V, now LED cannot conducting, present high impedance, owing to there being leakage current, voltage constantly raises, LED conducting after voltage is elevated to the cut-in voltage of LED, larger current can be drawn after LED conducting, and electronic switch only has faint electric current to flow through in off-state, so voltage is dragged down after LED conducting, LED cut-off after voltage reduces, cut-off voltage raises again ... so repeatedly just there is the phenomenon that LED glimmers.
Summary of the invention
The object of the invention is to provide a kind of electronic switch testing circuit be applied in LED illumination lamp for the deficiencies in the prior art, it identifies by the detection to electronic switch state the state that electronic switch is current, thus control LED enters corresponding duty, avoid the LED as load to occur the phenomenon of flicker, extend the operation strategies of circuit.
To achieve these goals, the invention provides a kind of electronic switch testing circuit be applied in LED illumination lamp, comprise electronic switch, LED as in the LED illumination lamp of load, discharge path, control and detection module, the input end of electronic switch is connected with power supply, the input end of discharge path, control and the input end of detection module, the input end of LED are all connected with the output terminal of electronic switch, the output terminal of discharge path, control and the output terminal of detection module, the equal ground connection of 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 by detecting the change in voltage situation of discharge path in discharge process the state that electronic switch is current; To control and the control signal output terminal of detection module is connected with the control signal input end of LED, make control and detection module that state current for electronic switch is supplied to LED, enter 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 that clocked flip detects 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 LED illumination lamp operationally, control and detection module can judge by the change in voltage situation of detection discharge path in discharge process the state that electronic switch is current, then state current for electronic switch is supplied to LED by control and detection module, corresponding duty is entered according to the current state of electronic switch by LED, avoid the LED as load to occur the phenomenon of flicker, extend the operation strategies of circuit.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is that the voltage V of the output terminal of electronic switch of the present invention disconnects and change curve schematic diagram in discharge process at electronic switch.
Fig. 3 is the voltage V of the output terminal of electronic switch of the present invention change curve schematic diagram in electronic switch closes and in discharge process.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Please refer to Fig. 1, the present invention is applied in the electronic switch testing circuit in LED illumination lamp, it comprises electronic switch 1, as the LED2 in the LED illumination lamp of load, discharge path 3, controls and detection module 4, the input end of electronic switch 1 is connected with power supply 5, the input end of discharge path 3, control and the input end of detection module 4, the input end of LED2 are all connected with the output terminal of electronic switch 1, the output terminal of discharge path 3, control and the output terminal of detection module 4, the equal ground connection of output terminal (GND) of 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; To control and the control signal output terminal of detection module 4 is connected with the control signal input end of LED2, make control and detection module 4 that state current for electronic switch 1 is supplied to LED2, enter corresponding duty by LED2 according to the current state of electronic switch 1.
As can be seen from Figure 1, a discharge path 3 is increased below at electronic switch 1, if electronic switch 1 disconnects, so only have weak current to flow through, so discharge path 3 can absorb (by electric discharge) using this part weak current the LED2 as load is not affected by this part electric current, still Weak-luminescence or flicker under the state avoiding LED2 light fixture to disconnect at electronic switch 1; But if electronic switch 1 is closed, working of discharge path 3 can waste a lot of power consumption always.
Therefore, the present invention is provided with control for controlled discharge path 3 duty and detection module 4, take LED2 as its principle of work of load explanation for example: suppose as the LED2 cut-in voltage of load be Vt, the voltage of the output terminal of electronic switch 1 is V, then to control and detection module 4 controlled discharge path 3 is less than at voltage V | Vo|(|Vo| < Vt) discharges, after voltage V is greater than Vo, stop electric discharge.If electronic switch 1 disconnects, the work due to discharge path 3 makes V be less than Vo < Vt always, so LED2 can not work; If electronic switch 1 closes, loop can provide very strong electric current (discharge current much larger than discharge path 3) so V can raise be greater than Vo, now controls and detection module 4 controlled discharge path 3 no longer discharges, and the LED2 as load also can normally work.
More particularly, as shown in Figures 2 and 3, the present invention is applied in the electronic switch testing circuit in LED illumination lamp, its concrete control procedure is as follows: suppose that the power supply 5 that electronic switch 1 connects is alternating currents, controls and electric discharge that in process that detection module 4 rises at voltage V, controlled discharge path 3 carries out a short time, if electronic switch 1 is disconnection, because electronic switch 1 can not provide enough electric currents during electric discharge, voltage V will be dragged down, and stop electric discharge, voltage V gos up; If electronic switch 1 is closed, enough electric currents can be provided in circuit, discharge process can not affect the change of voltage V substantially, thus just can judge by the voltage V changing condition detected in discharge process the state that electronic switch 1 is current, this status signal is supplied to the LED2 as load, LED2 just the state current according to electronic switch 1 can enter corresponding duty, and discharge process only accounts for the extremely short time in each cycle, can not waste too many power consumption.
Wherein, to control and detection module 4 can be detected for voltage triggered by the mode of discharge path 3 pairs of electronic switch 1 state-detection, 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 discharge path 3 pairs of electronic switch 1 state-detection as required, such as: control and detection module 4 are that clocked flip detects by the mode of discharge path 3 pairs of electronic switch 1 state-detection, namely by clock timing, detect once at interval of time T.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although done to explain to the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (3)
1. one kind is applied in the electronic switch testing circuit in LED illumination lamp, comprise electronic switch, as the LED in the LED illumination lamp 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 discharge path, control and the input end of detection module, the input end of LED are all connected with the output terminal of electronic switch, the output terminal of discharge path, control and the output terminal of detection module, the equal ground connection of 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 by detecting the change in voltage situation of discharge path in discharge process the state that electronic switch is current; To control and the control signal output terminal of detection module is connected with the control signal input end of LED, make control and detection module that state current for electronic switch is supplied to LED, enter corresponding duty by LED according to the current state of electronic switch; If the LED cut-in voltage as load is Vt, the voltage of the output terminal of electronic switch is V, then control and detection module controlled discharge path are less than at voltage V | Vo|, | discharge when Vo| < Vt, electric discharge is stopped after voltage V is greater than Vo, if electronic switch disconnects, work due to discharge path makes V be less than Vo < Vt always, so LED can not work; If electronic switch closes, loop can provide very strong electric current so V can raise be greater than Vo, and now control and detection module controlled discharge path no longer discharge, and the LED as load also can normally work.
2. the electronic switch testing circuit be applied in LED illumination lamp 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 be applied in LED illumination lamp according to claim 1, is characterized in that: described control and detection module are that clocked flip detects 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 |
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| 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 |
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| CN103293473A CN103293473A (en) | 2013-09-11 |
| CN103293473B true CN103293473B (en) | 2015-10-14 |
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Citations (3)
| 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 |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5117070B2 (en) * | 2007-02-26 | 2013-01-09 | パナソニック株式会社 | Photoelectric flasher |
| JP5244447B2 (en) * | 2008-04-28 | 2013-07-24 | 株式会社小糸製作所 | Lighting control device |
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2013
- 2013-06-06 CN CN201310222576.8A patent/CN103293473B/en active Active
Patent Citations (3)
| 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 |
| 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 |
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| CN103293473A (en) | 2013-09-11 |
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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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