Jpn. J. Appl. Phys. 41 (2002) pp. L1383-L1385 |Next Article| |Table of Contents|
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Letter
Transmittance Enhancement for Randomly Aligned Liquid Crystal Displays with Circular Polarizers
Yoshihisa Iwamoto1,2 and
Yasufumi Iimura1
1Faculty of Technology, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
2Research and Development Laboratory, Stanley Electric Co., Ltd., 1-3-1 Eda-nishi, Aoba-ku, Yokohama, Kanagawa 225-0014, Japan
(Received September 11, 2002; accepted for publication October 7, 2002)
We have theoretically and experimentally studied a method of improving the light transmittance for randomly aligned (RA) liquid crystal displays (LCDs). By considering a new panel configuration with circular polarizers, we prove theoretically that the transmittance of a uniformly aligned LCD panel depends only on the panel retardation regardless of the azimuthal director orientation. This theoretical result is applied for the improvement of the transmittance of RA-LCDs, and we confirm the significant improvement of the panel transmittance. We finally point out that the vertical alignment display mode is most suitable for our proposed method.
KEYWORDS:
liquid crystal display, amorphous LC alignment, circular polarizer
URL:
http://jjap.ipap.jp/link?JJAP/41/L1383/
DOI: 10.1143/JJAP.41.L1383
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