LED power supply control device and control method with light control and dimming functions
A technology of LED power supply and control device, applied in the direction of electroluminescent light source, light source, electric light source, etc., can solve the problems of not revealing the main control module, unable to know technical details, etc., to simplify circuit design, improve life and reliability , cost reduction effect
Active Publication Date: 2020-09-08
深圳市科华电源技术有限公司
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However, the technical solution of this patent does not disclose the specific control method of how the main control module determines the PWM signal to be output according to the illuminance value, and the specific technical details cannot be known.
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[0019] Explanation: In this patent application document, if there are expressions similar to "first resistance" and "second resistance", it does not necessarily mean that "first resistance" must appear before "second resistance" in this article. Just to show that these are two different gauge resistors. Sometimes, in order to match the description of the circuit diagram, "the second resistor" may appear before the "first resistor" in the claims or specification.
[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0021] refer to figure 1 , the present invention discloses a LED power supply control device with li...
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The invention discloses an LED power supply control device combining light control and dimming, comprising: a processor, a power supply circuit, a first sampling circuit, a second sampling circuit and a PWM output circuit; As a result, the current environmental state of the LED power supply is judged; if the current environmental state is determined to be in a dark state, the processor enables the dimming circuit to perform dimming detection, by sampling the voltage value of the dimming circuit, and then according to Sampling the change of the obtained voltage value to output the corresponding PWM signal, outputting the PWM signal through the PWM output circuit to control the output current of the LED power supply. The invention also discloses a control method combining light control and light adjustment. The device and method enhance the control precision of the LED power supply control device, reduce the cost, and improve the service life and reliability of the LED lighting fixture.
Description
technical field [0001] The invention relates to the field of LED lighting, in particular to an LED power supply control device and control method with light control and light adjustment functions. Background technique [0002] Patent 2017206477155 discloses an intelligent lighting control system, which directly converts light information into corresponding light digital values, and transmits the light intensity value to the main control module through I2C communication, and the main control module determines the PWM that should be output according to the illuminance value. signal, and the LED driver under the control of the PWM signal outputs the rated current to make the LED lamp produce a corresponding brightness. This process is in an infinite loop. According to the light value obtained in real time, the brightness of the LED lamps is adjusted in real time to achieve the effect of light adaptation. However, the technical solution of this patent does not disclose the spec...
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IPC IPC(8): H05B45/12H05B45/325H05B44/00
Inventor 马二华李秀飞林璐
Owner 深圳市科华电源技术有限公司