Analyses of Several Current Programmed AM OLED Pixel Circuits and Their Current Scaling Ratio

WANG Long-yan; WANG Zhong-jian; MA Xian-mei; FU Guo-zhu; JING Hai

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Analyses of Several Current Programmed AM OLED Pixel Circuits and Their Current Scaling Ratio

Device Technology & Physics | 更新时间：2020-08-12

- Analyses of Several Current Programmed AM OLED Pixel Circuits and Their Current Scaling Ratio
- Chinese Journal of Liquid Crystals and Displays Vol. 24, Issue 2, Pages: 204-209(2009)
- 作者机构：
  
  1. 中国科学院研究生院北京,100039
  2. 中国科学院长春光学精密机械与物理研究所北方液晶工程研究开发中心吉林长春 130031,E-mail:semicmos@gmail.com
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN304.5;TN431.2
- Received：15 August 2008，
  
  Revised：02 January 1900，
  
  Published Online：30 April 2009，
  
  Published：30 April 2009
- 稿件说明：
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王龙彦;王中健;马仙梅;付国柱;荆海. 几种电流型AM OLED像素电路及其电流缩放比的分析[J]. 液晶与显示, 2009,24(2): 204-209

WANG Long-yan;WANG Zhong-jian;MA Xian-mei;FU Guo-zhu;JING Hai. Analyses of Several Current Programmed AM OLED Pixel Circuits and Their Current Scaling Ratio[J]. 液晶与显示, 2009,24(2): 204-209
王龙彦;王中健;马仙梅;付国柱;荆海. 几种电流型AM OLED像素电路及其电流缩放比的分析[J]. 液晶与显示, 2009,24(2): 204-209 DOI：

WANG Long-yan;WANG Zhong-jian;MA Xian-mei;FU Guo-zhu;JING Hai. Analyses of Several Current Programmed AM OLED Pixel Circuits and Their Current Scaling Ratio[J]. 液晶与显示, 2009,24(2): 204-209 DOI：

摘要

分析了4种典型的电流型AM OLED像素驱动电路的工作原理

从中总结出了补偿阈值电压漂移的方法自动调节存储电容的电压以保证电流不变。着重提出了电流缩放比的定义

对传统结构、电流镜结构、分压结构和电容耦合结构这4种电流型AM OLED像素驱动电路的电流缩放比进行了比较和分析。在这4种电路中

电流缩放比依次增大

显示出电流型像素电路在解决电容充电时间问题上的进步与完善。

Abstract

Four typical current programmed AM OLED pixel circuits are analyzed in this paper

and based on these circuits

compensation method of threshold voltage shift is summarized

i.e.

auto-adjusting the voltage stored in the capacitor to supply a constant current. Current scaling ratio is defined

and with its increase

the current programmed AM OLED pixel circuits is improved in solving charging time of capacitor.

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Keywords

references

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