Title :
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.
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;
Conference_Titel :
Quality Electronic Design, 2007. ISQED '07. 8th International Symposium on
Conference_Location :
San Jose, CA
Print_ISBN :
0-7695-2795-7
DOI :
10.1109/ISQED.2007.20
