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上海大学 微电子研究与开发中心 上海
[ "严利民(1971-),男,江苏吴县人,副教授,从事平板显示驱动技术的研究。E-mai:yanlm@shu.edu.cn" ]
[ "龙云腾(1989-),男,山东威海人,硕士研究生,研究方向为新型显示驱动技术。" ]
[ "郭丽媛(1989-),女,山东泰安人,硕士研究生,研究方向为显示扫描技术。" ]
收稿日期:2014-01-06,
修回日期:2014-02-21,
网络出版日期:2014-05-06,
纸质出版日期:2014-10-05
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严利民, 龙云腾, 郭丽媛. 一种新型的OLED像素补偿驱动电路[J]. 液晶与显示, 2014,29(5): 728-732
YAN Li-min, LONG Yun-teng, GUO Li-yuan. A novel OLED pixel compensation driving circuit[J]. , 2014,29(5): 728-732
严利民, 龙云腾, 郭丽媛. 一种新型的OLED像素补偿驱动电路[J]. 液晶与显示, 2014,29(5): 728-732 DOI: 10.3788/YJYXS20142905.0728.
YAN Li-min, LONG Yun-teng, GUO Li-yuan. A novel OLED pixel compensation driving circuit[J]. , 2014,29(5): 728-732 DOI: 10.3788/YJYXS20142905.0728.
为了防止有机发光二极管(organic light-emitting diode, OLED)显示器随着使用时间增加而造成OLED像素驱动电路发生阈值电压和电源电压漂移,从而引起显示屏亮度不均匀和不稳定的现象,本文对OLED像素补偿驱动电路进行研究。首先对通用型的2T1C驱动电路进行分析,找出引起显示器亮度不均匀和不稳定的原因,然后以目前使用较多的4T1C像素补偿驱动电路为例,对该电路进行了深入的分析,指出这种电路结构的缺陷,最后针对这些缺陷,提出了改进的5T1C像素补偿驱动电路,并且对该电路进行了仿真,验证了其可行性。仿真结果表明,在显示阶段,输出电流稳定在2 A。基本可以改善OLED显示器亮度不稳定和不均匀的缺点。
With the time of using organic light emitting diode (OLED) monitor increasing
the OLED pixel driving circuits bring about shift of threshold voltage and power voltage
which will result in unstable and uneven brightness of the monitor. This paper studies the OLED pixel compensation driving circuit in order to prevent the phenomenon above. Firstly
this paper analyzes the universal driving circuit of 2T1C and finds the cause of uneven and unstable brightness monitor. Then
this paper tho-roughly analyzes the pixel driving circuit of 4T1C
which is popular in the market
and points out the defects of the circuit structure. Finally
this paper introduces a new structure of 5T1C pixel driving circuit
which has verified its feasibility by simulation to make up for these defects. The simulation results indicate that the output current is stable around 2 A in the display stage. It can improve the uneven and unstable brightness defects of the OLED display.
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