A new poly-Si TFT compensation pixel circuit employing AC driving mode for AMOLED displays

This paper presents a new poly-Si pixel circuit employing AC driving mode for active matrix organic light-emitting diode （AMOLED） displays. The proposed pixel circuit, which consists of one driving thin-film tran- sistor （TFT）, three switching TFTs, and one storage capacitor, can effectively compens...

Full description

Saved in:
Bibliographic Details
Published inJournal of semiconductors Vol. 34; no. 12; pp. 122 - 125
Main Author 宋小锋 罗建国 周雷 张立荣 吴为敬 彭俊彪
Format Journal Article
LanguageEnglish
Published 01.12.2013
Subjects
Active matrix displays
AMOLED
Circuits
Displays
OLED显示器
Organic light emitting diodes
Pixels
Semiconductor devices
Semiconductors
Thin film transistors
交流
像素电路
多晶硅TFT
有机发光二极管
补偿
驱动方式
Online AccessGet full text
ISSN1674-4926
DOI10.1088/1674-4926/34/12/125011

Cover

More Information
Summary:This paper presents a new poly-Si pixel circuit employing AC driving mode for active matrix organic light-emitting diode （AMOLED） displays. The proposed pixel circuit, which consists of one driving thin-film tran- sistor （TFT）, three switching TFTs, and one storage capacitor, can effectively compensate for the threshold voltage variation in poly-Si and the OLED degradation. As there is no light emission, except for during the emitting period, and a small number of devices used in the proposed pixel circuit, a high contrast ratio and a high pixel aperture ratio can be easily achieved. Simulation results by SMART-SPICE software show that the non-uniformity of the OLED current for the proposed pixel circuit is significantly decreased （〈 10%） with an average value of 2.63%, while that of the conventional 2T1C is 103%. Thus the brightness uniformity of AMOLED displays can be improved by using the proposed pixel circuit.
Bibliography:This paper presents a new poly-Si pixel circuit employing AC driving mode for active matrix organic light-emitting diode （AMOLED） displays. The proposed pixel circuit, which consists of one driving thin-film tran- sistor （TFT）, three switching TFTs, and one storage capacitor, can effectively compensate for the threshold voltage variation in poly-Si and the OLED degradation. As there is no light emission, except for during the emitting period, and a small number of devices used in the proposed pixel circuit, a high contrast ratio and a high pixel aperture ratio can be easily achieved. Simulation results by SMART-SPICE software show that the non-uniformity of the OLED current for the proposed pixel circuit is significantly decreased （〈 10%） with an average value of 2.63%, while that of the conventional 2T1C is 103%. Thus the brightness uniformity of AMOLED displays can be improved by using the proposed pixel circuit.
11-5781/TN
poly-Si; TFT, AMOLED; AC mode
Song Xiaofeng, Luo Jianguo, Zhou Lei, Zhang Llrong, Wu Weijing, Peng Junblao（1 State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China 2 School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510641, China）
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-4926
DOI:10.1088/1674-4926/34/12/125011