An optical feedback compensation circuit with a-Si:H thin-film transistors for active matrix organic light emitting diodes

被引：10

作者：

Kang, Moon Hyo ^{[1
]}

Hur, Ji Ho ^{[1
]}

Nam, Youn Duck ^{[1
]}

Lee, Eun Ho ^{[1
]}

Kim, Se Hwan ^{[1
]}

Jang, Jin ^{[1
]}

机构：

[1] Kyung Hee Univ, Adv Display Res Ctr & Silicon Display Technol, Seoul 130701, South Korea

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2008年 / 354卷 / 19-25期

关键词：

thin-film transistors; sensors; luminescence;

D O I：

10.1016/j.jnoncrysol.2007.09.033

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We propose a novel compensation pixel circuit for active matrix organic light emitting diode (AMOLED) display using thin-film transistor (TFT) optical feedback circuit consisting of four switching TFTs, one driving TFT, one photo-sensor and one capacitor. The optical feedback pixel is operated with two gate signals and one scan signal. An integrated scan driver is used to make the scan signal to switch the photo-sensor. Therefore, the AMOLED consisting of the optical feedback pixel circuit and the scan driver can be operated with LCD drivers. By circuit simulation using a Smart Spice, it is found that the proposed circuit can be successfully operated. The gate voltage of driving TFT is automatically discharged and can be compensated for the variation of V-th of driving TFT and degradation of OLED. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：2523 / 2528

页数：6