有机发光二极管(OLED)微显示器在长时间显示高亮、高对比度的静态画面之后会产生像素衰退不同,发光亮度衰减存在较大差异,更新画面后存在残影现象.为此,提出了一种电流PWM像素驱动电路对OLED像素衰退做出一定的补偿.文章介绍了电流PWM像素驱动电路的结构及其工作原理,分析了电流PWM像素驱动电路对OLED像素衰退补偿原理.通过实验得出该电路结构中提高OLED衰退补偿效果的几个主要因素.在像素衰退差异在30 MΩ以下时,电流PWM驱动电路的像素衰退率只有传统驱动电路的50％.
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