50.2: A Real‐time TFT Compensation through Power Line Current Sensing for High‐resolution AMOLED Displays

Abstract A real‐time compensation method for TFT variation is proposed for AMOLED displays. This method enables a column driver to sense TFT current of each pixel using a power line as a current sensing line while driving a pixel without increasing a scan time. A fast OLED degradation sensing is also possible to compensate the image sticking problem. A target application of the proposed driver is a simultaneous emission full‐HD AMOLED TV, whose scan time is 7.5μs at a scan frequency of 120Hz.