A led power supply system

Abstract

The invention discloses an LED power supply system, comprising a first power supply, a first light sensing module, a driving module and an LED light source module; the output end of the first power supply is connected to the input end of the driving module, and the output end of the driving module is connected to the LED light source Module connection, the output end of the first light sensing module is connected to the current adjustment end of the driving module; the first light sensing module is used to adjust its output signal according to the light intensity, and the driving module is used to adjust the output signal according to the output signal and the output voltage of the first power supply The current output to the LED light source module, wherein the light intensity is positively correlated with the current. Through the present invention, the brightness of the LED light source module is higher when the light intensity is higher, forming a larger visual contrast, and when the light intensity is lower, the brightness of the LED light source module is lower, which conforms to the visual experience of the human eye in a dark environment , and at the same time can also save power, it can be seen that the LED power supply system of the present invention not only saves energy, but also has a better visual experience.

Description

Technical field [0001] The present invention relates to the field of electronic technology, in particular to an LED power supply system. Background technique [0002] LED advertising is a new form of outdoor advertising. It uses advertising words or pictures composed of light-emitting diodes, such as the electronic large-screen advertisements that are usually seen on the street or some bright advertising words with colorful light and sign. LED advertising has the advantages of high contrast and fast response, so it has been widely used. [0003] Generally, LED advertisements turn on the LED light source when the light is relatively dark, but the brightness of the ordinary LED light source is often constant, which causes the brightness of the LED light source to be not strong enough, which is difficult to cause when the external light is not too dark. The visual contrast, the effect of LED advertising is not ideal, and in the case of very low light, the brightness of the same LED ...

AI Technical Summary

Problems solved by technology

[0003] Generally, LED advertisements turn on the LED light source when the light is relatively dark, but the brightness of ordinary LED light sources is often constant, which causes the brightness of the LED light source to be not strong enough when the external light is not too dark. Due to the visual contrast, the effect of LED advertising is not ideal, and in the case of very dark light, the brightness of the same LED light source is a bit dazzling, which brings a bad visual experience and also causes a waste of electric energy. It can be seen that the current LED power supply system cannot adjust the brightness of the LED light source according to changes in external light, resulting in unsatisfactory LED advertising effects

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