A Driving Scheme for Active-Matrix Organic Light-Emitting Diode Displays Based on Feedback

被引:13
|
作者
Ashtiani, Shahin J. [1 ]
Nathan, Arokia [1 ]
机构
[1] Univ Waterloo, Elect & Comp Engn Engn Dept, Waterloo, ON N2L 3G1, Canada
来源
JOURNAL OF DISPLAY TECHNOLOGY | 2006年 / 2卷 / 03期
关键词
Accelerating pulse; active matrix organic light-emitting diode (AMOLED); amorphous silicon; column driver; feedback; lead compensation; pixel circuit; thin-film transistor (TFT);
D O I
10.1109/JDT.2006.875140
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A scheme of driving active matrix organic light emitting diode (AMOLED) displays with hydrogenated amorphous silicon (a-Si) thin-film transistors (TFTs) is presented. By sending a feedback voltage from each pixel to a column driver during the programming cycle, the driving scheme can compensate for the instability of the TFTs, in particular, the shift in the threshold voltage. Measurement results show no change in the OLED current in the presence of a 1.3-V shift in the threshold voltage. Based on circuit analysis, a simple lead compensator and an accelerating pulse were employed to achieve fast pixel programming for a wide range of OLED currents. Simulation results show a programming time of less than 70 mu s for OLED currents as low as 50 nA.
引用
收藏
页码:258 / 264
页数:7
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