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提出一种新型的RGB-LED背光驱动系统。一方面,引入时间混色法技术,LED可以选择性地导通和关闭,因此降低了电源的损耗,提高了电源效率;另一方面,采用电压自适应电路结构,对于RGB三种LED灯来说,其导通所需要的正向电压不同,电压自适应结构可以使加在LED灯串上的电压随着同步信号变化而变化,保证加在LED灯串上的电压始终为满足导通条件的最小电压,使系统的效率最大化。实验结果说明该系统可以成功驱动RGB-LED背光模块,电源效率得到提高,证明了该背光系统的可行性。
Proposed a new type of RGB-LED backlight drive system. On the one hand, the introduction of time-mixing technique, LED can be selectively turned on and off, thus reducing the power loss and improve the power efficiency; the other hand, the use of voltage adaptive circuit structure for RGB three LED lights , The conduction of the required forward voltage is different from the voltage adaptive structure can be added to the LED light string voltage changes with the synchronization signal changes to ensure that the voltage added to the LED light string is always to meet the conduction conditions The minimum voltage to maximize the efficiency of the system. The experimental results show that the system can successfully drive the RGB-LED backlight module, and the power efficiency is improved, which proves the feasibility of the backlight system.