The full-color LED large screen is a high-energy-consuming product. In view of the energy-saving problem of LED display screens, the power supply system, power supply and control method of LED display screens were studied and optimized, and the \"LLC resonance + synchronous rectification centralized-distributed\" power supply scheme and the \"classified power supply\" mode for different LED diodes were proposed. At the same time, the LED screen power supply system designed by the above scheme was compared and calculated with the general power supply system. The conclusion is: the new power supply scheme proposed in this article can save about 20% energy compared with the traditional method; if the new LED power supply mode proposed in this article is adopted, it will further save 15% of energy. Therefore, the energy-saving design of the display screen has important social and economic benefits.
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