CN203492230U - An automatic brightness control circuit for an LED lamp - Google Patents
An automatic brightness control circuit for an LED lamp Download PDFInfo
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- CN203492230U CN203492230U CN201320573868.1U CN201320573868U CN203492230U CN 203492230 U CN203492230 U CN 203492230U CN 201320573868 U CN201320573868 U CN 201320573868U CN 203492230 U CN203492230 U CN 203492230U
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- Prior art keywords
- resistance
- triode
- electric capacity
- amplifier
- base chip
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses an automatic brightness control circuit for an LED lamp. The automatic brightness control circuit comprises a first to a fourteen resistor, a first to a sixth capacitor, a first to a fourth triode, a photoresistor, a potentiometer, a first amplifier, a second amplifier, a time base chip, a diode, a light emitting diode, and a bidirectional thyristor. In the automatic brightness control circuit for LED lamps, an environmental illumination detecting circuit is formed by the photoresistor, the potentiometer, the seventh resistor, and the ninth resistor. When illumination intensity is changed, the amplifiers output alternating current to the time base chip. The time base chip outputs a signal to control the conduction angle of the gate electrode of the bidirectional thyristor. Therefore, voltage on the two ends of the light emitting diode is controlled so as to achieve a function of automatically controlling light brightness.
Description
Technical field
The utility model relates to a kind of intednsity circuit, relates in particular to a kind of automatic brightness control circuit of LED lamp.
Background technology
Social now, non-renewable resources are fewer and feweri, the utilance of renewable resource can not be supplied with society from far away for the demand of the energy, therefore energy-conservationly become the target that society makes great efforts, what present most of LED lamp all adopted is constant luminance, can not, according to its brightness of the automatic brightness adjustment of environment, cause the waste of the energy.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem a kind of automatic brightness control circuit of LED lamp.
The utility model is achieved through the following technical solutions above-mentioned purpose:
A kind of automatic brightness control circuit of LED lamp, comprise the first resistance to the 14 resistance, the first electric capacity to the six electric capacity, the first triode to the four triodes, photo resistance, potentiometer, the first amplifier, the second amplifier, time base chip, diode, light-emitting diode and bidirectional thyristor, the first end of described the first resistance is connected with civil power is anodal with the positive pole of described light-emitting diode respectively, the second end of described the first resistance is connected with the first end of described the second resistance, the second end of described the second resistance is connected with the emitter of described the second triode with the base stage of described the first triode respectively, the collector electrode of described the first triode respectively with the first end of described the 6th resistance, the first end of described the 3rd resistance, the emitter of described the 3rd triode is connected with the base stage of described the 4th triode, the collector electrode of described the second triode is connected with the base stage of described the 3rd triode with the second end of described the 6th resistance respectively, the emitter of described the first triode respectively with the base stage of described the second triode, the collector electrode of described the 3rd triode, the emitter of described the 4th triode, the first end of described the second electric capacity, the first end of the first end of described photo resistance and described the 9th resistance is connected rear and ground connection, the second end of described the 3rd resistance is connected with the first end of described the 4th resistance and connects cathode voltage, the second end of described the 4th resistance respectively with the first end of described the first electric capacity, the first end of described the 5th resistance, the first end of described potentiometer is connected with the first end of described the 8th resistance, the second end ground connection of described the first electric capacity, the second end of described the 5th resistance respectively with the collector electrode of described the 4th triode, the first end of described the second electric capacity is connected with the in-phase input end of described the second amplifier, the second end of described potentiometer respectively with the sliding end of described potentiometer, the second end of the first end of described the 7th resistance and described photo resistance is connected, the second end of described the 8th resistance is connected with the normal phase input end of described the first amplifier with the second end of described the 9th resistance respectively, the second end of described the 7th resistance is connected with the first end of described the 3rd electric capacity with the inverting input of described the first amplifier respectively, the second end of described the 3rd electric capacity is connected with the inverting input of described the second amplifier with the output of described the first amplifier respectively, the clear terminal of the output of described the second amplifier base chip when described is connected, when described the earth terminal of base chip respectively with the first end of described the 4th electric capacity, described the 5th first end of electric capacity and the first end of described the 12 resistance are connected rear and ground connection, the voltage controling end of the second end of described the 5th electric capacity base chip when described is connected, the second end of described the 4th electric capacity is the low triggering end of base chip when described respectively, the high-triggering end of base chip when described, described the 13 first end of resistance and the negative pole of described diode are connected, the positive pole of described diode respectively with the second end of described the 13 resistance, when described, the discharge end of base chip is connected with the first end of described the tenth resistance, the power end of the second end of described the tenth resistance base chip when described is connected and connects positive voltage, the second end of described the 12 resistance is connected with described the 11 first end of resistance and the gate pole of described bidirectional thyristor respectively, the output of the second end of described the 11 resistance base chip when described is connected, the first anode of described bidirectional thyristor is connected with the first end of described the 6th electric capacity with the negative pole of described light-emitting diode respectively, the second end of described the 6th electric capacity is connected with the first end of described the 14 resistance, the second end of described the 14 resistance is connected with civil power negative pole with the second plate of described bidirectional thyristor respectively.
The beneficial effects of the utility model are:
The automatic brightness control circuit of the utility model LED lamp, by photo resistance and potentiometer, the 7th resistance, the 9th resistance, form ambient lighting testing circuit, when intensity of illumination changes, the electric current of amplifier exporting change is base chip then, time base chip signal output control the angle of flow of the gate pole of bidirectional thyristor, control the voltage at Light-Emitting Diode two ends, thereby reach the function of automatic control lamp brightness.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the automatic brightness control circuit of the utility model LED lamp.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the automatic brightness control circuit of the utility model LED lamp, comprise the first resistance R 1 to the 14 resistance R 14, the first capacitor C 1 is to the 6th capacitor C 6, the first triode VT1 to the four triode VT4, photo resistance RW, potentiometer RP, the first amplifier IC1, the second amplifier IC2, time base chip IC 3, diode D, LED and bidirectional thyristor SCR, the first end of the first resistance R 1 is connected with civil power is anodal with the positive pole of LED respectively, the second end of the first resistance R 1 is connected with the first end of the second resistance R 2, the second end of the second resistance R 2 is connected with the emitter of the second triode VT2 with the base stage of the first triode VT1 respectively, the collector electrode of the first triode VT1 respectively with the first end of the 6th resistance R 6, the first end of the 3rd resistance R 3, the emitter of the 3rd triode VT3 is connected with the base stage of the 4th triode VT4, the collector electrode of the second triode VT2 is connected with the base stage of the 3rd triode VT3 with the second end of the 6th resistance R 6 respectively, the emitter of the first triode VT1 respectively with the base stage of the second triode VT2, the collector electrode of the 3rd triode VT3, the emitter of the 4th triode VT4, the first end of the second capacitor C 2, the first end of the first end of photo resistance RW and the 9th resistance R 9 is connected rear and ground connection, the second end of the 3rd resistance R 3 is connected with the first end of the 4th resistance R 4 and connects cathode voltage, the second end of the 4th resistance R 4 respectively with the first end of the first capacitor C 1, the first end of the 5th resistance R 5, the first end of potentiometer RP is connected with the first end of the 8th resistance R 8, the second end ground connection of the first capacitor C 1, the second end of the 5th resistance R 5 respectively with the collector electrode of the 4th triode VT4, the first end of the second capacitor C 2 is connected with the in-phase input end of the second amplifier IC2, the second end of potentiometer RP respectively with the sliding end of potentiometer RP, the second end of the first end of the 7th resistance R 7 and photo resistance RW is connected, the second end of the 8th resistance R 8 is connected with the normal phase input end of the first amplifier IC1 with the second end of the 9th resistance R 9 respectively, the second end of the 7th resistance R 7 is connected with the first end of the 3rd capacitor C 3 with the inverting input of the first amplifier IC1 respectively, the second end of the 3rd capacitor C 3 is connected with the inverting input of the second amplifier IC2 with the output of the first amplifier IC1 respectively, the output of the second amplifier IC2 with time base chip IC 3 clear terminal be connected, time base chip IC 3 earth terminal respectively with the first end of the 4th capacitor C 4, the 5th first end of capacitor C 5 and the first end of the 12 resistance R 12 are connected rear and ground connection, the second end of the 5th capacitor C 5 with time base chip IC 3 voltage controling end be connected, the second end of the 4th capacitor C 4 respectively with time base chip IC 3 low triggering end, time base chip IC 3 high-triggering end, the first end of the 13 resistance R 13 is connected with the negative pole of diode D, the positive pole of diode D respectively with the second end of the 13 resistance R 13, time base chip IC 3 discharge end be connected with the first end of the tenth resistance R 10, the second end of the tenth resistance R 10 with time base chip IC 3 power end be connected and connect positive voltage, the second end of the 12 resistance R 12 is connected with the gate pole of bidirectional thyristor SCR with the first end of the 11 resistance R 11 respectively, the second end of the 11 resistance R 11 with time base chip IC 3 output be connected, the first anode of bidirectional thyristor SCR is connected with the first end of the 6th capacitor C 6 with the negative pole of LED respectively, the second end of the 6th capacitor C 6 is connected with the first end of the 14 resistance R 14, the second end of the 14 resistance R 14 is connected with civil power negative pole with the second plate of bidirectional thyristor SCR respectively.
The operation principle of the automatic brightness control circuit of the utility model LED lamp is as follows:
This automatic brightness control circuit, by a plurality of triodes, form civil power zero cross detection circuit, by photo resistance RW and potentiometer RP, the 7th resistance R 7, the 9th resistance R 9, form environment lighting detecting circuit, when intensity of illumination changes, the electric current of amplifier exporting change is base chip IC 3 then, time base chip IC 3 output signals control the angle of flow of the gate pole of bidirectional thyristor SCR, controlled the voltage at Light-Emitting Diode two ends, thereby reached the function of automatic control lamp brightness.
Claims (1)
1. the automatic brightness control circuit of a LED lamp, it is characterized in that: comprise the first resistance to the 14 resistance, the first electric capacity to the six electric capacity, the first triode to the four triodes, photo resistance, potentiometer, the first amplifier, the second amplifier, time base chip, diode, light-emitting diode and bidirectional thyristor, the first end of described the first resistance is connected with civil power is anodal with the positive pole of described light-emitting diode respectively, the second end of described the first resistance is connected with the first end of described the second resistance, the second end of described the second resistance is connected with the emitter of described the second triode with the base stage of described the first triode respectively, the collector electrode of described the first triode respectively with the first end of described the 6th resistance, the first end of described the 3rd resistance, the emitter of described the 3rd triode is connected with the base stage of described the 4th triode, the collector electrode of described the second triode is connected with the base stage of described the 3rd triode with the second end of described the 6th resistance respectively, the emitter of described the first triode respectively with the base stage of described the second triode, the collector electrode of described the 3rd triode, the emitter of described the 4th triode, the first end of described the second electric capacity, the first end of the first end of described photo resistance and described the 9th resistance is connected rear and ground connection, the second end of described the 3rd resistance is connected with the first end of described the 4th resistance and connects cathode voltage, the second end of described the 4th resistance respectively with the first end of described the first electric capacity, the first end of described the 5th resistance, the first end of described potentiometer is connected with the first end of described the 8th resistance, the second end ground connection of described the first electric capacity, the second end of described the 5th resistance respectively with the collector electrode of described the 4th triode, the first end of described the second electric capacity is connected with the in-phase input end of described the second amplifier, the second end of described potentiometer respectively with the sliding end of described potentiometer, the second end of the first end of described the 7th resistance and described photo resistance is connected, the second end of described the 8th resistance is connected with the normal phase input end of described the first amplifier with the second end of described the 9th resistance respectively, the second end of described the 7th resistance is connected with the first end of described the 3rd electric capacity with the inverting input of described the first amplifier respectively, the second end of described the 3rd electric capacity is connected with the inverting input of described the second amplifier with the output of described the first amplifier respectively, the clear terminal of the output of described the second amplifier base chip when described is connected, when described the earth terminal of base chip respectively with the first end of described the 4th electric capacity, described the 5th first end of electric capacity and the first end of described the 12 resistance are connected rear and ground connection, the voltage controling end of the second end of described the 5th electric capacity base chip when described is connected, the second end of described the 4th electric capacity is the low triggering end of base chip when described respectively, the high-triggering end of base chip when described, described the 13 first end of resistance and the negative pole of described diode are connected, the positive pole of described diode respectively with the second end of described the 13 resistance, when described, the discharge end of base chip is connected with the first end of described the tenth resistance, the power end of the second end of described the tenth resistance base chip when described is connected and connects positive voltage, the second end of described the 12 resistance is connected with described the 11 first end of resistance and the gate pole of described bidirectional thyristor respectively, the output of the second end of described the 11 resistance base chip when described is connected, the first anode of described bidirectional thyristor is connected with the first end of described the 6th electric capacity with the negative pole of described light-emitting diode respectively, the second end of described the 6th electric capacity is connected with the first end of described the 14 resistance, the second end of described the 14 resistance is connected with civil power negative pole with the second plate of described bidirectional thyristor respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320573868.1U CN203492230U (en) | 2013-09-16 | 2013-09-16 | An automatic brightness control circuit for an LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320573868.1U CN203492230U (en) | 2013-09-16 | 2013-09-16 | An automatic brightness control circuit for an LED lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203492230U true CN203492230U (en) | 2014-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320573868.1U Expired - Lifetime CN203492230U (en) | 2013-09-16 | 2013-09-16 | An automatic brightness control circuit for an LED lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203492230U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109496011A (en) * | 2015-02-15 | 2019-03-19 | 王小雪 | A kind of LED circuit |
| CN113382500A (en) * | 2021-06-07 | 2021-09-10 | 厦门佰晟电子有限公司 | Backlight constant brightness control system |
-
2013
- 2013-09-16 CN CN201320573868.1U patent/CN203492230U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109496011A (en) * | 2015-02-15 | 2019-03-19 | 王小雪 | A kind of LED circuit |
| CN113382500A (en) * | 2021-06-07 | 2021-09-10 | 厦门佰晟电子有限公司 | Backlight constant brightness control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN NUODE PHOTOELECTRIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CHENGDU HAODI TECHNOLOGY CO., LTD. Effective date: 20150106 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zeng Han Inventor before: Jing Xinyu |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 610000 CHENGDU, SICHUAN PROVINCE TO: 518000 SHENZHEN, GUANGDONG PROVINCE Free format text: CORRECT: INVENTOR; FROM: JING XINYU TO: CENG HAN |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150106 Address after: 518000, Shenzhen, Guangming District, Guangdong, Gongming street, Chang Zhen community, Changxin science and Technology Industrial Park, 10, third floor, East Patentee after: SHENZHEN NUODE OPTOELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 610000, room 6, building 118, incubator Software Park, Chengdu hi tech Zone Incubator, Sichuan, China Patentee before: CHENGDU HAODI TECHNOLOGY Co.,Ltd. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151210 Address after: 518000 Shenzhen City, Nanshan District province science and Technology Park, North Road, CLOU Road, building A, block, room 1, room 2, room 10, No. 4 Patentee after: SHENZHEN HAIPAI TECHNOLOGY Co.,Ltd. Address before: 518000, Shenzhen, Guangming District, Guangdong, Gongming street, Chang Zhen community, Changxin science and Technology Industrial Park, 10, third floor, East Patentee before: SHENZHEN NUODE OPTOELECTRONIC TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140319 |