Abstract
A voltage controlled four thin-film transistor (TFT) pixel circuit for an amorphous-silicon (a-Si) active-matrix organic light-emitting diode (AM-OLED) display was designed, simulated, and evaluated. Because deviation and aging of the properties of the drive TFT was the cause of image sticking and degradation of the image quality, these had to be compensated for. We propose a new and suitable circuit for an a-Si AM-OLED display. This circuit was composed of four TFTs and one storage capacitor, and had four stages : Preparation, Programing threshold voltage (VT), Writing data, and Emission.
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