LTPS-TFT threshold voltage compensation pixel circuit for AMOLED

Lu-jiang HUANG-FU; Can ZHENG; Yun-fei LI; Li-bin LIU; Jian-chao ZHU; Yi-peng CHEN

doi:10.3788/YJYXS20173208.0614

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LTPS-TFT threshold voltage compensation pixel circuit for AMOLED

Driver and System | 更新时间：2020-08-12

- LTPS-TFT threshold voltage compensation pixel circuit for AMOLED
- Chinese Journal of Liquid Crystals and Displays Vol. 32, Issue 8, Pages: 614-621(2017)
- 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：
- 基金信息：
- DOI：10.3788/YJYXS20173208.0614
  CLC： TN27
- Received：09 February 2017，
  
  Accepted：12 April 2017，
  
  Published：05 August 2017
- 稿件说明：
移动端阅览
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：

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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Lu-jiang HUANG-FU

Related Institution

School of Electronic Science and Engineering， Southeast University

Technology Center, BOE Technology Group Co., Ltd.

University of Chinese Academy of Sciences

Institute of Microelectronics of Chinese Academy of Sciences

Key Laboratory of Science and Technology on Silicon Devices, Chinese Academy of Sciences

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