A novel OLED pixel compensation driving circuit

YAN Li-min; LONG Yun-teng; GUO Li-yuan

doi:10.3788/YJYXS20142905.0728

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A novel OLED pixel compensation driving circuit

Table of contents | 更新时间：2020-08-12

- A novel OLED pixel compensation driving circuit
- Chinese Journal of Liquid Crystals and Displays Vol. 29, Issue 5, Pages: 728-732(2014)
- 作者机构：
  
  上海大学微电子研究与开发中心上海
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20142905.0728
  CLC： TN27
- Received：06 January 2014，
  
  Revised：21 February 2014，
  
  Published Online：06 May 2014，
  
  Published：05 October 2014
- 稿件说明：
移动端阅览
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.

摘要

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。

Abstract

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.

关键词

Keywords

references

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