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Optical Engineering

Common voltage control technology for highly reliable active matrix liquid crystal displays
Author(s): Seung-Woo Lee
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Paper Abstract

The relationship between flicker and a common voltage (Vcom), which directly affects the image sticking problem of liquid crystal displays, is explained. A simple symmetry of flicker with respect to Vcom is introduced. A new circuit utilizing a digital interface to generate Vcom is proposed. The circuit easily controls Vcom through the digital interface, enabling automation of the Vcom optimization. The development of an automatic Vcom-tuning system plus the Vcom optimization algorithms using the symmetry of flicker is presented. The total tuning time was 0.35 seconds regardless of screen size.

Paper Details

Date Published: 1 February 2008
PDF: 5 pages
Opt. Eng. 47(2) 024001 doi: 10.1117/1.2824378
Published in: Optical Engineering Volume 47, Issue 2
Show Author Affiliations
Seung-Woo Lee, Kyunghee Univ. (South Korea)

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