A Novel LTPS-TFT Pixel Circuit Compensating for TFT Threshold-Voltage Shift and OLED Degradation for AMOLED

Author

Lin, Chih-Lung ; Chen, Yung-Chih

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan

Volume

28

Issue

2

fYear

2007

Firstpage

129

Lastpage

131

Abstract

This letter presents a novel pixel circuit that uses low-temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) composed of one driving and four switching TFTs for active-matrix organic light-emitting diodes (AMOLEDs) with a voltage-source method. The proposed circuit effectively enables threshold-voltage-shift correction of the drive TFT and compensates for degradation of the OLED using a feedback structure

Keywords

circuit feedback; organic light emitting diodes; silicon; thin film circuits; thin film transistors; AMOLED; LTPS TFT; Si; active matrix organic light emitting diodes; feedback structure; low temperature polycrystalline silicon thin film transistors; pixel circuit; threshold voltage shift; voltage source method; Active matrix organic light emitting diodes; Anodes; Feedback circuits; Optical feedback; Organic light emitting diodes; Switches; Switching circuits; Thermal degradation; Thin film transistors; Threshold voltage; Active-matrix organic light-emitting diode (AMOLED); degradation; low-temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs);

fLanguage

English

Journal_Title

Electron Device Letters, IEEE

Publisher

ieee

ISSN

0741-3106

Type

jour

DOI

10.1109/LED.2006.889523

Filename

4068955