PWM调制LED显示屏高灰度高刷新的一种方案

摘要

在利用PWM调制实现灰度的显示屏中，如LED全彩显示屏，刷新率高，灰度信息多是两个非常重要的指标。标准的LED显示屏控制系统在灰度的实现与刷新率两者之间很难寻求一个平衡。本文提出了一种平均子场分割的方法来实现高灰度高刷新的方案，这种方案虽然在一定程度上降低了亮度效率，降低10%∼30%左右，但是能够更好的提升灰度的显示效果，同时能够达到很高的动态刷新率。%The high refresh rate and more gray information are very important for using PWM to achieve grey level, such as full color LED screen. The standard LED display control system either realized good gray and the low refresh rate, or realized the high refresh rate and not achieving full gray information. A mean field segmentation method is proposed to achieve high intensity high refresh rate. To a certain extent, though brightness efficiency, about 10%~30% is reduced, gray display effect can be better improved and high dynamic refresh rate can be reached at the same time