Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1996-04-25
1999-11-16
Dang, Hung Xuan
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349110, 349129, 349153, 349154, G02F 11337, G02F 11339, G02F 1141
Patent
active
059867361
ABSTRACT:
A liquid crystal device is formed by a pair of substrates each having thereon electrodes, and a liquid crystal disposed between the substrates so as to be movable along surfaces of the substrates. The liquid crystal is disposed over regions extending between the surfaces of the substrates including an effective optical modulation region, a first peripheral region outside the effective optical modulation region and a second peripheral region formed along a part or an entirety of outer periphery of the first peripheral region. The liquid crystal is disposed to have a higher liquid crystal molecular pretilt angle in the first peripheral region than in the effective optical modulation region. The liquid crystal is disposed in a random alignment state free from uniaxial alignment characteristic or in a layer structure in the second peripheral region. As a result, the liquid crystal molecular movement along the extension of substrates is suppressed in the effective optical modulation region and in the second peripheral region and relatively allowed in the first peripheral region, so that the impurities in the liquid crystal are confined in the second peripheral region while avoiding the liquid crystal thickness irregularity.
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Aoyama Kazuhiro
Kodera Yasuto
Mihara Tadashi
Miura Seishi
Nukanobu Kouki
Canon Kabushiki Kaisha
Dang Hung Xuan
Duong Tai V.
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