Study on the pixel voltage of TFTLCDs with optical measurement

Ya-Hsiang Tai, Chien Chih Chen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The image quality of a TFTLCD is dependent on the voltages on the pixel electrodes, which can be influenced by many factors, such as coupled voltage from scan bus and leakage current of TFT. However, it is difficult to directly probe the pixel voltage electrically. Therefore, measuring the transmittance of the LCD is very helpful to characterize a panel. Looking up the transmittance curve of the liquid crystal cell, the voltage on the pixel can be retrieved. However, the liquid crystal can not respond the pixel voltage in real time and thus such a method may not be used at video frequency. In this paper, various applications of the optical measurement to study the coupled voltage and leakage of pixel electrodes in a TFTLCD are discussed.

Original languageEnglish
Title of host publicationProceedings of the 5th Asian Symposium on Information Display, ASID 1999
EditorsHan-Ping D. Shieh, I-Wei Wu
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages85-88
Number of pages4
ISBN (Electronic)9579734798, 9789579734790
DOIs
StatePublished - 1 Jan 1999
Event5th Asian Symposium on Information Display, ASID 1999 - Hsinchu, Taiwan
Duration: 17 Mar 199919 Mar 1999

Publication series

NameProceedings of the 5th Asian Symposium on Information Display, ASID 1999

Conference

Conference5th Asian Symposium on Information Display, ASID 1999
CountryTaiwan
CityHsinchu
Period17/03/9919/03/99

Keywords

  • Coupled voltage
  • Leakage current
  • Optical measurement
  • Pixel voltage
  • TFTLCD

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