A New Organic Thin-Film Transistor Based Current-Driving Pixel Circuit for Active-Matrix Organic Light-Emitting Displays

Author

Shin, Aram ; Hwang, Sang Jun ; Yu, Seung Woo ; Sung, Man Young

Author_Institution

Dept. of Electr. Eng., Korea Univ.

fYear

2007

fDate

26-28 March 2007

Firstpage

59

Lastpage

66

Abstract

A new current-driving pixel circuit for active-matrix organic light-emitting diodes (AMOLEDs), composed of four organic thin-film transistors (OTFTs) and one capacitor, is proposed using a current scaling method. Designing pixel circuits with OTFTs has many problems due to the instability of the OTFT parameters with the material characteristics still unknown. Despite the problems in using OTFTs to drive the pixel circuit, our work could be set as a goal for future OTFT development. The simulation results show enhanced reliability between the OTFT parameters with improved linearity between input data and OLED luminescence at low current levels. Also, large variation of OTFT parameters such as threshold voltage and mobility was successfully compensated to reliable values

Keywords

circuit simulation; organic light emitting diodes; organic semiconductors; scaling circuits; thin film transistors; AMOLED; active matrix organic light-emitting diodes; current driving; current scaling; organic thin film transistor; pixel circuit; Active matrix organic light emitting diodes; Active matrix technology; Capacitors; Circuit simulation; Design methodology; Flat panel displays; Linearity; Organic light emitting diodes; Organic thin film transistors; Thin film transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Quality Electronic Design, 2007. ISQED '07. 8th International Symposium on

Conference_Location

San Jose, CA

Print_ISBN

0-7695-2795-7

Type

conf

DOI

10.1109/ISQED.2007.20

Filename

4149012