A new current-programmed pixel design for AMOLED displays implemented with organic thin-film transistors

Abstract

                                           

A Pixel Circuit for Compensating Electrical Characteristics Variation and OLED Degradation

“…From (10), it is found that when the mobility µ increases, ∆Vµ will increase, and vice versa. Consequently, in (12), when the mobility varies, I OLED remains stable. Therefore, the circuit can compensate the mobility variation.…”

“…From (12), it is found that the OLED current is independent of the threshold voltage V TH_T2 . That is, when V TH_T2 varies, I OLED remains stable.…”

“…The current compensation circuit can successfully compensate the TFT's electrical characteristics' variation [12,13]. However, the compensation speed is relatively slow at low gray level.…”