Light control circuit
A light control circuit and resistance technology, applied in the field of LED lighting, can solve the problems of high failure rate, flickering or multiple back-and-forth conversions, lamps that cannot be automatically completed, etc., to achieve the effect of low cost and simple structure
Active Publication Date: 2018-11-23
HANCON LIGHTING CO LTD ZHUHAI
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Problems solved by technology
[0002] The current outdoor lighting and lighting in public places require the function of turning off the lights during the day and turning on the lights at night. Most lamps cannot be completed automatically, and need to be manually switched or controlled by a computer system; the light control circuit on the market is in a critical state between day and night. There will be unstable states such as flickering or multiple back and forth transitions, and the failure rate is high
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[0012] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0013] refer to figure 1 , a light control circuit, including a phototransistor connected in sequence, a voltage window comparator and a feedback amplifier, the phototransistor is used to receive an optical signal, and convert the optical signal into an electrical signal and send it to the voltage window comparator; the voltage The window comparator is used to compare the voltage of the electrical signal with the...
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The invention relates to a light control circuit. The light control circuit comprises a photo-transistor, a voltage window comparator and a feedback amplifier which are sequentially connected; whereinthe photo-transistor is configured to receive an optical signal, convert the optical signal into an electrical signal and transport to the voltage window comparator; the voltage window comparator isconfigured to compare the voltage of the electrical signal with a reference voltage, and send the compared signal to a main control MCU for adjustment of a LED light source; and the feedback amplifieris used for amplifying the signal output by the voltage window comparator and feeding back the amplified signal to the input end of the voltage window comparator. The light control circuit disclosedby the invention uses discrete components, and has a simple structure and low cost; and the feedback amplifier locks the signal in time so that the light source does not exhibit an unstable state suchas flicker or multiple back and forth transitions during the critical state of daytime and nighttime transitions.
Description
technical field [0001] The invention relates to the technical field of LED lighting, in particular to a light control circuit. Background technique [0002] The current outdoor lighting and lighting in public places require the function of turning off the lights during the day and turning on the lights at night. Most lamps cannot be completed automatically, and need to be manually switched or controlled by a computer system; the light control circuit on the market is in a critical state between day and night. Sometimes there will be unstable states such as flickering or multiple back and forth transitions, and the failure rate is high. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a light control circuit with reliable performance. [0004] The technical solution adopted by the present invention to solve its technical problems is: [0005] A light control circuit, comprising a p...
Claims
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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/10
Inventor 贺洪
Owner HANCON LIGHTING CO LTD ZHUHAI