在硅基OLED微显示器中,为了解决很小的像素驱动电流的难题,论文提出了一种像素电路.此像素电路由2个PMOS、2个NMOS、1个存储电容、1个OLED和4根信号线组成.并且利用HSPICE基于TSMC 0.35 μm CMOS 5 V工艺的参数进行了仿真验证.在此像素电路中,当OLED发光时流过OLED的电流是恒定的,并且通过控制OLED的发光时间来实现不同的灰度.此像素电路完全由数字信号控制,能实现精确的灰度调节.通过6个子场,实现了21级灰度,进而论证了实现64级灰度(0～63)的可能性.当OLED发光时,流过的恒定电流是35.3 nA.
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