A Novel LTPS TFT Pixel Circuit for Compensating IR Drop of Large Area AMOLED Display

Abstract

We have proposed a new AMOLED pixel design compensating IR drop besides threshold voltage (Vth) variation of LTPS TFTs without any additional signal. The SPICE simulation results show that the proposed pixel, which consists of 7 PMOS TFTs and 1 capacitor, successfully compensates not only Vth variation but also IR drop. Vth of the driving TFTs are detected and data voltage can be memorized when PMOS only inverter has high input voltage.