A new poly-Si TFT compensation pixel circuit employing AC driving mode for AMOLED displays
A new poly-Si TFT compensation pixel circuit employing AC driving mode for AMOLED displays
复制标题
一种用于AMOLED显示器的采用交流驱动模式的新型多晶硅TFT补偿像素电路
DOI:
10.1088/1674-4926/34/12/125011
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发表时间:
2013-12
期刊:
影响因子:
--
通讯作者:
Peng Jun-Biao
中科院分区:
文献类型:
--
作者:
Zhou Lei;Zhang Li-Rong;Wu Wei-Jing;Peng Jun-Biao
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 transistor (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.
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