Reflective liquid crystal display device having a compensator with a retardation value between 0.15 .mu.m and 0.38 .mu.m and a single polarizer

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United States of America Patent

PATENT NO 5619356
SERIAL NO

08307913

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Abstract

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A reflective liquid crystal display device including: a first substrate; a second substrate; a liquid crystal layer interposed between the first substrate and the second substrate; electrodes for applying a voltage to the liquid crystal layer; a polarizing plate provided on a side of the liquid crystal layer on which the first substrate is provided; a reflective member provided on a side of the liquid crystal layer on which the second substrate is provided; and an optical compensation member provided between the polarizing plate and the liquid crystal layer, wherein the liquid crystal layer has a twist angle in a range of 220.degree. to 260.degree. and a retardation value of 0.5 .mu.m to 0.8 .mu.m, the optical compensation member has a retardation value in a range of 0.15 .mu.m to 0.38 .mu.m, and an angle .beta. which is formed between a polarization axis direction of the polarizing plate and an alignment direction of liquid crystal molecules in the liquid crystal layer on a side of the polarizing plate, and an angle .gamma. which is formed between an axis direction of a slower optical axis of the optical compensation member and an alignment direction of the liquid crystal molecules, satisfy one of following expressions (A) and (B) when m is an integer: 0.5.beta.+45.degree. m-15.degree..ltoreq..gamma..ltoreq.0.5.beta.+45.degree. m+5.degree.(A) 0.5.beta.+45.degree. m+7.5.degree..ltoreq..gamma..ltoreq.0.5.beta.+45.degree. m+27.5.degree.(B) is disclosed.

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Patent Owner(s)

Patent OwnerAddress
SHARP KABUSHIKI KAISHA1 TAKUMI-CHO SAKAI-KU SAKAI CITY OSAKA 5908522 ?5908522

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ichiro, Fukuda Kanazawa, JP 1 119
Kozo, Nakamura Kashiba, JP 1 119
Seiichi, Mitsui Nara, JP 1 119

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