Voltage-programmed AM-OLED pixel circuit to compensate threshold voltage and mobility variations

Author

Kim, Youngjae ; Lee, Hongseok

Author_Institution

MEMS Display & Sensor Lab., Soongsil Univ., Seoul, South Korea

Volume

49

Issue

13

fYear

2013

fDate

June 20 2013

Firstpage

796

Lastpage

798

Abstract

A novel voltage-programmed pixel circuit is proposed to achieve an active-matrix organic light-emitting display (AM-OLED) based on a low temperature polycrystalline silicon thin-film transistor (TFT) with an enhanced electrical stability and uniformity. The proposed pixel circuit consists of one driving TFT, one setup TFT, four switching TFTs, one capacitor, and four control signal lines. Through an extensive simulation work based on the HSPICE tool, it has been verified that the proposed pixel circuit can compensate for both mobility variations and threshold voltage shifts of the driving TFT.

Keywords

LED displays; elemental semiconductors; silicon; thin film transistors; AM-OLED; HSPICE tool; Si; active-matrix organic light-emitting display; control signal lines; driving TFT; electrical stability enhancement; electrical uniformity enhancement; extensive simulation work; low temperature polycrystalline silicon thin-film transistor; mobility variations compensation; switching TFT; threshold voltage shifts compensation; voltage-programmed pixel circuit;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2013.0735

Filename

6553023