Digital driving method for AM OLED with pixel circuit of 2T1C

JIA Yi-ming; TU Zhen-tao; ZHANG Xiao-ning; LIANG Zhi-hu; LI Chun-huai; WEN Yi-qian; PENG W

doi:10.3788/YJYXS20153004.0655

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Digital driving method for AM OLED with pixel circuit of 2T1C

Driving & Controlling | 更新时间：2020-08-12

- Digital driving method for AM OLED with pixel circuit of 2T1C
- Chinese Journal of Liquid Crystals and Displays Vol. 30, Issue 4, Pages: 655-659(2015)
- 作者机构：
  
  1. 深圳市华星光电技术有限公司,广东深圳,518132
  2. 西安交通大学电子物理与器件教育部重点实验室,陕西西安,710049
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(No.61372018)
- DOI：10.3788/YJYXS20153004.0655
  CLC： TN27;TN702
- Received：17 December 2014，
  
  Revised：06 February 2015，
  
  Published：05 August 2015
- 稿件说明：
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贾一鸣, 屠震涛, 张小宁, 梁志虎, 李纯怀, 温亦谦, 彭威臣, 朱立伟. 2T1C像素电路的AMOLED数字驱动方法研究[J]. 液晶与显示, 2015,30(4): 655-659

JIA Yi-ming, TU Zhen-tao, ZHANG Xiao-ning, LIANG Zhi-hu, LI Chun-huai, WEN Yi-qian, PENG Wei-chen, ZHU Li-wei. Digital driving method for AM OLED with pixel circuit of 2T1C[J]. , 2015,30(4): 655-659
贾一鸣, 屠震涛, 张小宁, 梁志虎, 李纯怀, 温亦谦, 彭威臣, 朱立伟. 2T1C像素电路的AMOLED数字驱动方法研究[J]. 液晶与显示, 2015,30(4): 655-659 DOI： 10.3788/YJYXS20153004.0655.

JIA Yi-ming, TU Zhen-tao, ZHANG Xiao-ning, LIANG Zhi-hu, LI Chun-huai, WEN Yi-qian, PENG Wei-chen, ZHU Li-wei. Digital driving method for AM OLED with pixel circuit of 2T1C[J]. , 2015,30(4): 655-659 DOI： 10.3788/YJYXS20153004.0655.

摘要

为了改善由于像素间TFT特性不同导致的有源矩阵有机发光显示(AM OLED) 亮度不均匀现象

研究了基于2T1C像素电路的边寻址边显示(Address While Display

AWD) 数字驱动方法

该方法采用等权重的11子场累积式发光方式

并用有序抖动方法实现256灰度级。通过在14 cm(5.5 in)的AM OLED模组上对该方法的实现和验证

结果表明

数字驱动方法在0~255灰度区间的不均匀性最大为28%

对灰度变化不敏感

而模拟驱动的不均匀性随灰度级的降低显著增大

最大为133%。数字驱动显示图像的均匀性显著优于模拟驱动

且采用基本的2T1C像素电路即可实现

降低了对像素电路和制备成本的要求。

Abstract

In order to improve the uniform brightness of Active Matrix Organic Light Emitting Display (AM OLED) caused by the difference characteristic of TFTs' among pixels

digital driving methods of Address While Display (AWD) based on accumulated lighting using 11 equal weight subfields and order dither to realize 256 gray scales was investigated and implemented on AM OLED module of 5.5 inches with pixel circuit of 2T1C.The experimental results of gray scales (0~255) show that digital driving is insensitive to gray scales and the maximum value of non-uniform brightness is 28%.It is increased as gray scale increasing and the maximum value reaches to 133% by using analog driving.The uniform of displayed image using digital driving is superior to that using analog driving and easy to be implemented based on pixel circuit of 2T1C.The complexity to pixel circuit and processing cost will be decreased.

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Keywords

references

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