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Jpn. J. Appl. Phys. 42 (2003) pp. L51-L53  |Next Article|  |Table of Contents|
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Letter

Transmitted Light Enhancement of Electric-Field-Controlled Multidomain Vertically Aligned Liquid Crystal Displays Using Circular Polarizers and a Cholesteric Liquid Crystal Film

Yoshihisa Iwamoto^1,2 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 Center, Stanley Electric Co.,Ltd., 1-3-1 Eda-nishi, Aoba-ku, Yokohama, Kanagawa 225-0014, Japan

(Received October 18, 2002; accepted for publication November 19, 2002)

We have proposed two new optical configurations to improve the light transmittance of a fringing-field-controlled multidomain vertically aligned liquid crystal display (FEF-MVA-LCD). We show that, by using a MVA-LC panel sandwiched between two circular polarizers, improvement of the maximum transmittance by more than 30% is achieved in comparison to the transmittance of a conventional panel configuration using two linear polarizers. We also demonstrate that further improvement of the light efficiency was achieved by combining a cholesteric liquid crystal film with a circular polarizer. This method using cholesteric liquid crystal and circular polarizer films may be the most effective for the improvement of the luminance of a FEF-controlled MVA-LCD panel.

KEYWORDS: MVA-LCD, circular polarizer, cholesteric liquid crystal film
URL: http://jjap.ipap.jp/link?JJAP/42/L51/
DOI: 10.1143/JJAP.42.L51

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