一种LTPS-TFT AMOLED像素电路的理论研究

皇甫鲁江; 郑灿; 李云飞; 刘利宾; 朱健超; 陈义鹏

doi:10.3788/YJYXS20173208.0614

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一种LTPS-TFT AMOLED像素电路的理论研究

驱动与系统 | 更新时间：2020-08-12

- 一种LTPS-TFT AMOLED像素电路的理论研究
- LTPS-TFT threshold voltage compensation pixel circuit for AMOLED
- 液晶与显示 2017年32卷第8期页码：614-621
- 作者机构：
  
  京东方科技集团股份有限公司技术中心, 北京 100176
- 作者简介：
  
  [ "皇甫鲁江(1964-)男, 山东菏泽人, 博士, 教授级高级工程师, 现工作重点为AMOLED技术量产化和技术竞争力提升相关研发。E-mail:lj.huangfu@boe.com.cn" ]
- 基金信息：
- DOI：10.3788/YJYXS20173208.0614
  中图分类号： TN27
- 收稿日期：2017-02-09，
  
  录用日期：2017-4-12，
  
  纸质出版日期：2017-08-05
- 稿件说明：
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皇甫鲁江, 郑灿, 李云飞, 等. 一种LTPS-TFT AMOLED像素电路的理论研究[J]. 液晶与显示, 2017,32(8):614-621.

Lu-jiang HUANG-FU, Can ZHENG, Yun-fei LI, et al. LTPS-TFT threshold voltage compensation pixel circuit for AMOLED[J]. Chinese journal of liquid crystals and displays, 2017, 32(8): 614-621.
皇甫鲁江, 郑灿, 李云飞, 等. 一种LTPS-TFT AMOLED像素电路的理论研究[J]. 液晶与显示, 2017,32(8):614-621. DOI： 10.3788/YJYXS20173208.0614.

Lu-jiang HUANG-FU, Can ZHENG, Yun-fei LI, et al. LTPS-TFT threshold voltage compensation pixel circuit for AMOLED[J]. Chinese journal of liquid crystals and displays, 2017, 32(8): 614-621. DOI： 10.3788/YJYXS20173208.0614.

摘要

本文对一种LTPS-TFT AMOLED电压型阈值电压（

）补偿像素电路进行了理论研究，分析了影响

补偿效果的主要因素。电路的补偿效果主要由驱动TFT

的获取精度和随后的保持精度决定。在

获取过程中，相关误差主要由驱动TFT转移特性电流对存储电容充电的充电率不足产生|在显示信号与

叠加过程中，与

保持节点连接的电容增量等因素会造成

保持精度的损失。根据分析的结果，本文解释了高分辨率像素电路补偿效果下降的原因。

Abstract

This paper presents a LTPS-TFT voltage-programmed threshold voltage (

) compensation pixel circuit for AMOLED. Two effective factors on the compensation are studied and analyzed

one is

charging level in driving TFT

detecting and the other is keeping accuracy of detected

in display signal adding. In the process of

detecting

the correlated error is attributed to insufficient

charging through driving TFT's transfer current; and in the subsequent process of display signal adding

the accuracy loss of

keeping is attributed to the increment of capacity connected to the

keeping node. According to the analyses

the reason of compensation decaying in the high resolution pixel circuit is explained.

关键词

Keywords

references

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