Compensation Pixel Circuit to Improve Image Quality for Mobile AMOLED Displays

Abstract

This paper proposes a new pixel circuit using low- temperature polycrystalline silicon thin-film transistors (LTPS TFTs) for use in mobile active matrix organic light-emitting diode (AMOLED) displays. The purpose of a pixel circuit is to supply stable and uniform currents to current-driving devices of OLEDs. The proposed pixel circuit uses overlapping compensation times to extend the period of precise sensing of V TH variations of LTPS TFTs. Moreover, the proposed circuit prevents a current from