Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Display Technology
  • Vol. 2,
  • Issue 3,
  • pp. 254-257
  • (2006)

Leakage and Charge Injection Optimization in a-Si AMOLED Displays

Not Accessible

Your library or personal account may give you access

Abstract

In this paper, we examine the effect of switch thin-film transistor (TFT) leakage and charge injection on the operation and driving of amorphous silicon (a-Si) active matrix organic light-emitting diode (AMOLED) displays. Charge injection causes an undesirable and immediate drop in the data voltage stored on the storage capacitor C<sub>S</sub> when the switch TFT is turned off, and the leakage of the switch TFT causes the charge on C<sub>S</sub> to gradually leak out over the frame time. While making the row line negative helps reduce the leakage, it increases the voltage swing on the row line and causes more charge injection. We have demonstrated that for a given V<sub>DD</sub>, there is an optimal negative gate drive voltage on the switch TFT that minimizes the overall drop in data voltage on C<sub>S</sub> over the frame time. In addition, we have also shown that even though this optimal driving point changes with aging of the display since both leakage and V<sub>T</sub> increase over time, it is possible to keep the voltage drop on C<sub>S</sub> constant irrespective of aging. The analysis provides the designer with a means to improve the long term grey-scale performance of the AMOLED display.

© 2006 IEEE

PDF Article
More Like This
Optimal scan strategy for mega-pixel and kilo-gray-level OLED-on-silicon microdisplay

Yuan Ji, Feng Ran, Weigui Ji, Meihua Xu, Zhangjing Chen, Yuxi Jiang, and Weixin Shen
Appl. Opt. 51(17) 3731-3743 (2012)

Optimized blue-phase liquid crystal for field-sequential-color displays

Yuge Huang, Haiwei Chen, Guanjun Tan, Hitoshi Tobata, Shin-ichi Yamamoto, Eiji Okabe, Yi-Fen Lan, Cheng-Yeh Tsai, and Shin-Tson Wu
Opt. Mater. Express 7(2) 641-650 (2017)

Depth-based dynamic lightness adjustment power-saving algorithm for AMOLED in head-mounted display

Peter Chondro, Zun-Rong Yao, and Shanq-Jang Ruan
Opt. Express 26(25) 33158-33165 (2018)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved