A New Pixel Circuit Compensating for Brightness Variation in Large Size and High Resolution AMOLED Displays

Author

Lu, Hau-Yan ; Chang, Ting-Chang ; Tai, Ya-Hsiang ; Liu, Po-Tsun ; Chi, Sien

Author_Institution

Nat. Chiao Tung Univ., Hsinchu

Volume

3

Issue

4

fYear

2007

Firstpage

398

Lastpage

403

Abstract

A new pixel design and driving method for active-matrix organic light-emitting diode (AMOLED) display using low-temperature polycrystalline silicon thin-film transistor (LTPS-TFT) is proposed. The new circuit consists of five TFTs and one capacitor to eliminate the variation in the threshold voltage of the TFTs, and the drop in the supply voltage in a single frame operation. The proposed pixel circuit has been verified to realize uniform output current by the simulation work using HSPICE software. The simulated error rate of the output current is also discussed in this paper. The novel pixel design has great potential for use in large size and high resolution AMOLED displays.

Keywords

organic light emitting diodes; silicon; thin film transistors; AMOLED displays; HSPICE software; LTPS-TFT; active-matrix organic light-emitting diode; brightness variation; low-temperature polycrystalline silicon thin-film transistor; pixel circuit; Active-matrix organic light-emitting diode (AMOLED); currrent–resistance (I–R) drop; currrent-resistance ( I- R) drop; pixel design; polycrystalline silicon thin-film transistors (poly-Si TFTs); uniformity;

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2007.900921

Filename

4356463