CN109757020B - Control circuit based on shimmer protection - Google Patents
Control circuit based on shimmer protection Download PDFInfo
- Publication number
- CN109757020B CN109757020B CN201910186618.4A CN201910186618A CN109757020B CN 109757020 B CN109757020 B CN 109757020B CN 201910186618 A CN201910186618 A CN 201910186618A CN 109757020 B CN109757020 B CN 109757020B
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- comparator
- micro
- triode
- control circuit
- resistor
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- 239000003990 capacitor Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000005286 illumination Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004297 night vision Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a control circuit based on low-light protection, and belongs to the technical field of circuits. The control circuit based on the low-light protection comprises a photoresistor, a comparator, a control circuit and a low-light switch; the photoresistor, the comparator and the control circuit are sequentially connected in series, and the micro-light switch is connected with the control circuit. The invention designs a practical circuit through the relation between the illumination and the resistance of the photoresistor. Only when the illumination reaches the requirement of the micro-light tube, the micro-light tube can work normally, and damage of the micro-light tube caused by misoperation of a micro-light switch is avoided.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a control circuit based on low-light protection.
Background
The existing military photoelectric equipment has night vision function, and the adopted micro-light tube can be used only at night, if the micro-light switch is turned on by misoperation in daytime, the micro-light tube is possibly permanently damaged by strong light.
In order to avoid damage to the micro light pipe caused by misoperation of the micro light switch, the invention designs a control circuit based on micro light protection.
Disclosure of Invention
The invention aims to provide a control circuit based on micro-light protection, which solves the problem that micro-light tube damage is easily caused by misoperation of a micro-light switch at present.
In order to solve the above technical problems, the present invention provides a control circuit based on micro-light protection, comprising:
the photoresistor, the comparator and the control circuit are sequentially connected in series;
and the micro-light switch is connected with the control circuit.
Optionally, the photoresistor and the resistor R1 form a voltage dividing circuit and output a voltage value.
Optionally, the control circuit includes a triode V1, a triode V2, a control power tube V3 and a voltage conversion chip; wherein,,
the emitter of the triode V1 is connected with the emitter of the triode V2, and the base electrode of the triode V1 is connected with the comparator through a resistor R2; the base electrode of the triode V2 is connected with the micro-light switch through a resistor R3, and the collector electrode is grounded;
the collector of the triode V1 is connected with the resistor R4 and the control power tube V3 at the same time, and is connected with the power supply VCC through the resistor R4.
Optionally, the voltage conversion chip comprises a diode V4, a comparator N2, capacitors C1-C2 and resistors R5-R6; wherein,,
the diode V4 is connected with the VIN end and the VO end of the comparator N2; the resistor R5 is connected with the VO end and the ADJ end of the comparator N2; the ADJ end of the comparator N2 is grounded through the resistor R6; the capacitor C1 and the capacitor C2 are connected in series and connected in parallel to the VIN end and the VO end of the comparator N2.
The invention provides a control circuit based on low-light protection, which is designed to be practical through the relation between the illumination and the resistance of a photoresistor. Only when the illumination reaches the requirement of the micro-light tube, the micro-light tube can work normally, and damage of the micro-light tube caused by misoperation of a micro-light switch is avoided.
Drawings
FIG. 1 is a block diagram of a control circuit based on micro-light protection provided by the invention;
fig. 2 is a schematic diagram of a specific structure of a control circuit based on micro-light protection according to the present invention.
Detailed Description
The following describes a control circuit based on micro light protection in detail with reference to the drawings and the specific embodiments. Advantages and features of the invention will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
Example 1
The invention provides a control circuit based on low-light protection, and the structure of the control circuit is shown in figure 1. The control circuit based on the low-light protection comprises a photoresistor 1, a comparator 2, a control circuit 3 and a low-light switch 4; the photoresistor 1, the comparator 2 and the control circuit 3 are sequentially connected in series, and the micro-light switch 4 is connected with the control circuit 3.
Specifically, fig. 2 shows a schematic diagram of a specific structure of the control circuit based on micro-light protection. The photoresistor 1 and the resistor R1 form a voltage dividing circuit and output a voltage value, and the voltage value is in a direct proportion relation with the illumination intensity. The control circuit comprises a triode V1, a triode V2, a control power tube V3 and a voltage conversion chip; the emitter of the triode V1 is connected with the emitter of the triode V2, and the base of the triode V1 is connected with the comparator through a resistor R2; the base electrode of the triode V2 is connected with the micro-light switch through a resistor R3, and the collector electrode is grounded; the collector of the triode V1 is connected with the resistor R4 and the control power tube V3 at the same time, and is connected with the power supply VCC through the resistor R4. The voltage conversion chip comprises a diode V4, a comparator N2, capacitors C1-C2 and resistors R5-R6; the diode V4 is connected to the VIN end and the VO end of the comparator N2; the resistor R5 is connected with the VO end and the ADJ end of the comparator N2; the ADJ end of the comparator N2 is grounded through the resistor R6; the capacitor C1 and the capacitor C2 are connected in series and connected in parallel to the VIN end and the VO end of the comparator N2.
With continued reference to fig. 2, the voltage value output by the voltage divider circuit is compared with the reference voltage set by the comparator N1, and when the input voltage value is greater than the reference voltage value, the comparator N1 outputs a high level, and the triode V1 is turned on; at the moment, the micro-light switch 4 is turned on to output high level, the triode V2 is conducted, the power tube V3 is further controlled to be conducted, and finally the voltage required by the micro-light tube is output through the voltage conversion chip; when the voltage value input by the comparator N1 is smaller than the reference voltage value, the comparator N1 outputs a low level, the triode V1 is not turned on, and at this time, even if the micro-light switch 4 is turned on, the voltage required by the micro-light tube cannot be output.
The invention designs a practical circuit through the relation between the illumination and the resistance of the photoresistor. Only when the illumination reaches the requirement of the micro-light tube, the micro-light tube can work normally, and damage of the micro-light tube caused by misoperation of a micro-light switch is avoided.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (1)
1. A control circuit based on micro-light protection, comprising:
the photoresistor, the comparator N1 and the control circuit are sequentially connected in series;
the micro-light switch is connected with the control circuit;
the photosensitive resistor and the resistor R1 form a voltage dividing circuit and output a voltage value;
the control circuit comprises a triode V1, a triode V2, a control power tube V3 and a voltage conversion chip; wherein,,
the emitter of the triode V1 is connected with the emitter of the triode V2, and the base electrode of the triode V1 is connected with the comparator N1 through a resistor R2; the base electrode of the triode V2 is connected with the micro-light switch through a resistor R3, and the collector electrode is grounded;
the collector of the triode V1 is connected with a resistor R4 and the control power tube V3 at the same time, and is connected with a power supply VCC through the resistor R4;
the voltage conversion chip comprises a diode V4, a comparator N2, capacitors C1-C2 and resistors R5-R6; wherein,,
the diode V4 is connected with the VIN end and the VO end of the comparator N2; the resistor R5 is connected with the VO end and the ADJ end of the comparator N2; the ADJ end of the comparator N2 is grounded through the resistor R6; the capacitor C1 and the capacitor C2 are connected in series and connected in parallel to the VIN end and the VO end of the comparator N2;
comparing the voltage value output by the voltage dividing circuit with the reference voltage set by the comparator N1, and when the voltage value input by the comparator N1 is larger than the reference voltage value, outputting a high level by the comparator N1, and conducting the triode V1; at the moment, the micro-light switch is turned on, a high level is output, the triode V2 is conducted, the power tube V3 is further controlled to be conducted, and finally, the voltage required by the micro-light tube is output through the voltage conversion chip; when the voltage value input by the comparator N1 is smaller than the reference voltage value, the comparator N1 outputs a low level, the triode V1 is not turned on, and at this time, even if the micro-light switch is turned on, the voltage required by the micro-light tube cannot be output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910186618.4A CN109757020B (en) | 2019-03-12 | 2019-03-12 | Control circuit based on shimmer protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910186618.4A CN109757020B (en) | 2019-03-12 | 2019-03-12 | Control circuit based on shimmer protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109757020A CN109757020A (en) | 2019-05-14 |
| CN109757020B true CN109757020B (en) | 2023-08-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910186618.4A Active CN109757020B (en) | 2019-03-12 | 2019-03-12 | Control circuit based on shimmer protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109757020B (en) |
Citations (12)
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|---|---|---|---|---|
| US4755725A (en) * | 1985-12-12 | 1988-07-05 | Varo, Inc. | High intensity light shut-down circuit for night vision goggle |
| US5153424A (en) * | 1991-02-06 | 1992-10-06 | Litton Systems, Inc. | Flux monitor high light intensity cut-off circit for night vision devices |
| EP1339266A2 (en) * | 2001-12-28 | 2003-08-27 | Kotka Terminal Equipment OY | Twilight switch |
| CN2590305Y (en) * | 2002-10-24 | 2003-12-03 | 南京理工大学 | Multifunctional image intensifier bright light automatic protecting apparatus |
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| WO2015051688A1 (en) * | 2013-10-09 | 2015-04-16 | 珠海格力电器股份有限公司 | Protective circuit for input voltage of switch power source |
| CN106094653A (en) * | 2016-08-10 | 2016-11-09 | 江苏北方湖光光电有限公司 | A kind of current control circuit based on retaining mechanism |
| CN205754995U (en) * | 2016-05-31 | 2016-11-30 | 深圳市纳林科技有限公司 | A kind of low power switch power supply |
| CN206908916U (en) * | 2017-07-25 | 2018-01-19 | 惠州市元盛科技有限公司 | A kind of circuit of intelligent control lighting apparatus brightness |
| CN207652585U (en) * | 2017-12-12 | 2018-07-24 | 湖北久之洋红外系统股份有限公司 | The multiple protector of low-light level night vision device |
| CN208369202U (en) * | 2018-06-19 | 2019-01-11 | 成都航域卓越电子技术有限公司 | A kind of current foldback circuit of Switching Power Supply |
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| US7326903B2 (en) * | 2006-06-29 | 2008-02-05 | Noble Peak Vision Corp. | Mixed analog and digital pixel for high dynamic range readout |
| JP5962115B2 (en) * | 2012-03-26 | 2016-08-03 | 富士通株式会社 | Power circuit |
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2019
- 2019-03-12 CN CN201910186618.4A patent/CN109757020B/en active Active
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|---|---|---|---|---|
| US4755725A (en) * | 1985-12-12 | 1988-07-05 | Varo, Inc. | High intensity light shut-down circuit for night vision goggle |
| US5153424A (en) * | 1991-02-06 | 1992-10-06 | Litton Systems, Inc. | Flux monitor high light intensity cut-off circit for night vision devices |
| EP1339266A2 (en) * | 2001-12-28 | 2003-08-27 | Kotka Terminal Equipment OY | Twilight switch |
| CN2590305Y (en) * | 2002-10-24 | 2003-12-03 | 南京理工大学 | Multifunctional image intensifier bright light automatic protecting apparatus |
| CN101428590A (en) * | 2008-08-13 | 2009-05-13 | 程滋颐 | Pick-up head for cars |
| CN102438358A (en) * | 2011-09-26 | 2012-05-02 | 胡文松 | Passive infrared constant-temperature induction control dim light/all light module |
| WO2015051688A1 (en) * | 2013-10-09 | 2015-04-16 | 珠海格力电器股份有限公司 | Protective circuit for input voltage of switch power source |
| CN205754995U (en) * | 2016-05-31 | 2016-11-30 | 深圳市纳林科技有限公司 | A kind of low power switch power supply |
| CN106094653A (en) * | 2016-08-10 | 2016-11-09 | 江苏北方湖光光电有限公司 | A kind of current control circuit based on retaining mechanism |
| CN206908916U (en) * | 2017-07-25 | 2018-01-19 | 惠州市元盛科技有限公司 | A kind of circuit of intelligent control lighting apparatus brightness |
| CN207652585U (en) * | 2017-12-12 | 2018-07-24 | 湖北久之洋红外系统股份有限公司 | The multiple protector of low-light level night vision device |
| CN208369202U (en) * | 2018-06-19 | 2019-01-11 | 成都航域卓越电子技术有限公司 | A kind of current foldback circuit of Switching Power Supply |
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| CN109757020A (en) | 2019-05-14 |
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