Title :
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
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;
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
DOI :
10.1109/EDSSC.2007.4450143
