液晶与显示2017，Vol.32Issue(8)：614-621,8.DOI:10.3788/YJYXS20173208.0614
一种LTPS-TFT AMOLED像素电路的理论研究
LTPS-TFT threshold voltage compensation pixel circuit for AMOLED
皇甫鲁江 1郑灿 1李云飞 1刘利宾 1朱健超 1陈义鹏1
作者信息
- 1. 京东方科技集团股份有限公司 技术中心,北京100176
- 折叠
摘要
Abstract
This paper presents a LTPS-TFT voltage-programmed threshold voltage (Vth) compensation pixel circuit for AMOLED. Two effective factors on the compensation are studied and analyzed, one is Cst charging level in driving TFT Vth detecting and the other is keeping accuracy of detected Vth in display signal adding. In the process of Vth detecting, the correlated error is attributed to insufficient Cst charging through driving TFT's transfer current; and in the subsequent process of display signal adding, the accuracy loss of Vth keeping is attributed to the increment of capacity connected to the Vth keeping node. According to the analyses, the reason of compensation decaying in the high resolution pixel circuit is explained.关键词
有源矩阵有机发光二极管/阈值电压补偿/像素电路Key words
active-matrix organic light-emitting diode/threshold voltage compensation/pixel circuit分类
信息技术与安全科学引用本文复制引用
皇甫鲁江,郑灿,李云飞,刘利宾,朱健超,陈义鹏..一种LTPS-TFT AMOLED像素电路的理论研究[J].液晶与显示,2017,32(8):614-621,8.
