| 有源OLED像素电路的设计与仿真 |
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| 引用本文： | 黄金英,安吉宇,张志伟,赵玉环,荆海,凌志华.有源OLED像素电路的设计与仿真[J].液晶与显示,2005,20(4):318-323. |
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| 作者姓名： | 黄金英 安吉宇 张志伟 赵玉环 荆海 凌志华 |
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| 作者单位： | 1. 中国科学院,长春光学精密机械与物理研究所,北方液晶研究开发中心,吉林,长春,130031
2. 中国科学院,长春光学精密机械与物理研究所,激发态物理重点实验室,吉林,长春,130033 |
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| 基金项目： | 国家“863”计划(No.2004AA303560,No.2003AA311091)，国家科技攻关计划(No.2004BA106C)资助项目 |
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| 摘 要： | 设计了有源OLED显示用非晶硅薄膜晶体管恒流型4-TFT像素驱动电路，并给出了驱动方法。应用HSPICE仿真了恒流型像素驱动电路的工作过程，详细分析了源（Source）电压VDD、存储电容Cs，以及开关晶体管T1、驱动晶体管T3的宽长比等参数对电路的输出特性的影响。仿真结果表明，此电路可以在整个帧周期持续供给OLED器件电流，并且解决了由于各像素驱动管阈值电压的差异带来的OLED亮度的不均匀问题。
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| 关 键 词： | 有源OLED 非晶硅薄膜晶体管 像素驱动电路 仿真 |
| 文章编号： | 1007-2780(2005)04-0318-06 |
| 修稿时间： | 2005年4月1日 |
Design and Simulation of 4-TFT Pixel Electrode Circuit for Active-matrix OLED |
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| HUANG Jin-ying,AN Ji-yu,ZHANG Zhi-wei,ZHAO Yu-huan,JING Hai,LING ZHI-HUA.Design and Simulation of 4-TFT Pixel Electrode Circuit for Active-matrix OLED[J].Chinese Journal of Liquid Crystals and Displays,2005,20(4):318-323. |
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| Authors: | HUANG Jin-ying AN Ji-yu ZHANG Zhi-wei ZHAO Yu-huan JING Hai LING ZHI-HUA |
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| Affiliation: | HUANG Jin-ying~1,AN Ji-yu~1,ZHANG Zhi-wei~1,ZHAO Yu-huan~1,JING Hai~1,LING Zhi-hua~2 |
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| Abstract: | Constant-current, four-thin-film-transistor (TFT) pixel electrode circuit, based on amorphous silicon thin-film-transistor (a-Si TFT) for active-matrix organic light-emitting display, was designed and its driving method was proposed. Influence of V_(DD) voltage, storage capacitor (C_S) and W/L ratio of switching TFT (T_1), driving TFT (T_3) on the output characteristics of four-TFT pixel electrode circuit were analyzed in details using HSPICE software. Simulation results indicate that continuous pixel electrode excitation can be achieved with this circuit, and the heterogeneousness of luminance induced by TFT threshold voltage variation was eliminated. |
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| Keywords: | active-matrix organic light-emitting device amorphous silicon thin-film-transistor pixel (electrode) circuit simulation |
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