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Improving Color Tracking in In-Plane Switching Mode Liquid-Crystal Displays

Published online by Cambridge University Press:  31 January 2011

Yuka Utsumi ,
Shinichi Komura ,
Ikuo Hiyama ,
Makoto Tsumura  and
Katsumi Kondo
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Abstract

Color tracking describes the ability of a display to faithfully reproduce the color quality of the source image. In liquid-crystal displays (LCDs), color tracking is dependent on brightness. In order to achieve high-performance color reproduction in LCDs, the accuracy of color tracking needs to be improved. By analyzing the characteristics of twisted-nematic (TN) and in-plane switching (IPS) modes of display, the cause of poor color tracking in each mode and the differences in their causes can be clarified. In TN mode displays, both chromaticity and brightness relate to the director configuration, that is, the directional alignment of the rod-like molecules of the liquid crystals, which varies with applied voltage. The ideal IPS LCD, by virtue of its operating principle, theoretically achieves perfect color tracking; however, in actual use, the color tracking is less than optimal due to twist deformation caused by the fixed directors on the alignment layer. Based on our analysis of these phenomena, we propose strategies for improving color tracking in IPS LCDs.

Keywords

flat-panel displayscolor trackingin-plane switching modeliquid-crystal displays (LCDs)twisted-nematic mode.
Type
Research Article
Information
MRS Bulletin , Volume 27 , Issue 11: Advanced Flat-Panel Displays and Materials , November 2002 , pp. 870 - 873
Copyright
Copyright © Materials Research Society 2002

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