P‐25: An AMOLED Pixel Circuit Compensating for Variation of Sub‐threshold Swing and Threshold Voltage Based on Double Gate a‐IGZO TFTs ^†

Abstract

In this paper, an AMOLED pixel circuit based on amorphous indium‐gallium‐zinc‐oxide (a‐IGZO) thin‐film transistors (TFTs) compensating for variations in sub‐threshold swing (SS) and threshold voltage (VTH) of driving TFT is proposed. The proposed pixel circuit is composed of five TFTs and one capacitor. From the simulation results, when the SS and VTH shifts of the driving up to ±10% and ±1 V, the maximum OLED current error can be suppressed to 3.6% and 7.2%, respectively.