AMOLEDs With a Pixel-Driving Architecture for Eliminating Crosstalk

Author

Kohno, Tohru ; Kageyama, Hiroshi ; Miyamoto, Mitsuhide ; Nakamura, Norihiro ; Akimoto, Hajime

Author_Institution

Central Res. Lab., Hitachi, Ltd., Tokyo, Japan

Volume

59

Issue

11

fYear

2012

Firstpage

3024

Lastpage

3029

Abstract

A pixel-driving architecture for high-resolution active-matrix organic light-emitting diodes (AMOLEDs)-which eliminates crosstalk-is proposed. The proposed architecture utilizes the fact that the hysteresis characteristic of low-temperature-polysilicon thin-film transistors (TFTs) can be controlled by negative bias. The high-amplitude negative-bias precharge in the architecture can suppress hysteresis in one frame length by means of a simple pixel circuit composed of three TFTs and one capacitor. The result of applying this architecture is a high-resolution AMOLED that generates no crosstalk. A 3.0-in 202 × 267-ppi full-color panel based on this pixel-driving architecture was developed, and it was confirmed that this panel produces moving images that are free of crosstalk.

Keywords

LED displays; organic light emitting diodes; thin film transistors; AMOLED; crosstalk elimination; high-amplitude negative-bias precharge; high-resolution active-matrix organic light-emitting diodes; low-temperature-polysilicon TFT; pixel-driving architecture; size 3 in; thin-film transistors; Active matrix organic light emitting diodes; Crosstalk; Hysteresis; Logic gates; Programming; Thin film transistors; active-matrix organic light-emitting diode (OLED) (AMOLED); free of crosstalk; hysteresis;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2012.2213256

Filename

6293874