Ferroelectric liquid crystal device
First Claim
1. A ferroelectric liquid crystal device which comprises at least one pair of counterposed substrates, a ferroelectric liquid crystal material provided between the substrates, means for applying an electric field to the liquid crystal material and provided at the substrates, an alignment-controlling layer provided on the surface on the liquid crystal material side of each of the substrates, and a sealing member at the peripheral edges of the substrates, the alignment-controlling layer being a film of polyphenylene.
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Abstract
A ferroelectric liquid crystal device which comprises at least one pair of counterposed substrates, a ferroelectric liquid crystal material provided between the substrates, means for applying an electric field to the liquid crystal material and provided at the substrates, an alignment-controlling layer provided on the surface on the liquid crystal material side of each of the substrates, and a sealing member at the peripheral edges of the substrates, the alignment-controlling layer being a film of an organic polymer whose β dispersion temperature is higher than the curing temperature of a sealant for the sealing member, preferably at least 200° C., has a good alignment state of ferroelectric liquid crystal molecules achieved by cooling alone without any application of an electric field and has good display qualities such as a high contrast.
23 Citations
4 Claims
- 1. A ferroelectric liquid crystal device which comprises at least one pair of counterposed substrates, a ferroelectric liquid crystal material provided between the substrates, means for applying an electric field to the liquid crystal material and provided at the substrates, an alignment-controlling layer provided on the surface on the liquid crystal material side of each of the substrates, and a sealing member at the peripheral edges of the substrates, the alignment-controlling layer being a film of polyphenylene.
Specification
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- Resources
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Current AssigneeHitachi, Ltd.
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Original AssigneeHitachi, Ltd.
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InventorsKondo, Katsumi, Nakada, Tadao, Kitamura, Teruo, Yokokura, Hisao, Iwasaki, Kishiro, Hanawa, Yasuo, Mukoh, Akio, Era, Susumu
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Primary Examiner(s)Stoll, Robert L.
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Assistant Examiner(s)Treanor, Richard
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Application NumberUS07/263,982Time in Patent Office950 DaysField of Search252/299.4, 350/339 R, 350/340, 350/341, 350/343, 350/350 SUS Class Current349/135CPC Class CodesC09K 19/0225 FerroelectricC09K 19/2021 Compounds containing at lea...G02F 1/133711 by organic films, e.g. poly...
