A Novel Top Emission Pixel Circuit Compensating for TFT Threshold Voltage Variation and Luminance Degradation of OLED

Author

Lin, Chih-Lung ; Liao, Kuo-Chao

Author_Institution

Nat. Cheng Kung Univ., Tainan

fYear

2007

fDate

20-22 Dec. 2007

Firstpage

385

Lastpage

388

Abstract

This work demonstrates a novel pixel circuit composed of top emission architecture with a voltage programming method. Besides compensating for the threshold voltage variation of TFTs, the proposed circuit can improve the luminance degradation of active-matrix organic light-emitting diode (AMOLED) by using OLED voltage as a feedback of OLED luminance degradation. In addition, the reversed-bias voltage applied to OLED can suppress the degradation of OLED. The simulation results show that the proposed circuit can effectively compensate for TFT threshold voltage variation and improve luminance degradation of OLED.

Keywords

organic light emitting diodes; thin film transistors; OLED voltage; TFT threshold voltage variation; active-matrix organic light-emitting diode; luminance degradation; reversed-bias voltage; top emission architecture; top emission pixel circuit compensation; voltage programming method; Active matrix organic light emitting diodes; Apertures; Circuit simulation; Flat panel displays; Optical feedback; Organic light emitting diodes; Thermal degradation; Thin film transistors; Threshold voltage; Voltage control; Active-matrix organic light-emitting diode (AMOLED); degradation; reversed-bias voltage; top mission;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices and Solid-State Circuits, 2007. EDSSC 2007. IEEE Conference on

Conference_Location

Tainan

Print_ISBN

978-1-4244-0637-1

Electronic_ISBN

978-1-4244-0637-1

Type

conf

DOI

10.1109/EDSSC.2007.4450143

Filename

4450143