A novel current driving method using organic TFT pixel circuit for active-matrix OLED

Author

Shin, Aram ; Yoon, Bongno ; Sung, Man

Author_Institution

Dept. of Electr. Eng., Korea Univ., Seoul

fYear

2007

fDate

29-31 Dec. 2007

Firstpage

413

Lastpage

416

Abstract

A novel current driving pixel circuit for active- matrix organic light-emitting diodes (OLEDs) based on organic TFTs (OTFTs), is presented and verified by HSPICE simulation. The simulation results show that the proposed pixel circuit, which is a current-mirror structure consisting of five organic TFTs and one capacitor, has current nonuniformity of less than 2.5% throughout the entire data range. Also, variation in OLED current due to threshold voltage degradation of organic TFTs is effectively compensated to reliable values.

Keywords

SPICE; compensation; driver circuits; organic light emitting diodes; thin film transistors; HSPICE simulation; OLED current variation; active-matrix OLED; current driving pixel circuit; current-mirror structure; organic TFT pixel circuit; threshold voltage degradation; Active matrix organic light emitting diodes; Active matrix technology; Capacitors; Circuit simulation; Flat panel displays; Organic light emitting diodes; Organic thin film transistors; Switches; Thin film transistors; Threshold voltage; Active-matrix organic light-emitting diode (AMOLED); current driving; organic TFT (OTFT); pixel circuit;

fLanguage

English

Publisher

ieee

Conference_Titel

Microelectronics, 2007. ICM 2007. Internatonal Conference on

Conference_Location

Cairo

Print_ISBN

978-1-4244-1846-6

Electronic_ISBN

978-1-4244-1847-3

Type

conf

DOI

10.1109/ICM.2007.4497741

Filename

4497741