发明公开
EP0391439A1 Ferroelectric liquid crystal composition and light switching element comprising the same
失效
Flüssigkristallineferroelektrische Zusammensetzung und sie enthaltendes Lichtschaltelement。
- 专利标题： Ferroelectric liquid crystal composition and light switching element comprising the same
- 专利标题（中）： Flüssigkristallineferroelektrische Zusammensetzung und sie enthaltendes Lichtschaltelement。
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申请号： EP90106661.3申请日： 1990-04-06
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公开(公告)号： EP0391439A1公开(公告)日： 1990-10-10
- 发明人: Terashima, Kanetsugu , Kikuchi, Makoto , Murashiro, Katsuyuki
- 申请人： Chisso Corporation
- 申请人地址： 6-32, Nakanoshima 3-chome Kita-ku Osaka-shi Osaka-fu JP
- 专利权人： Chisso Corporation
- 当前专利权人： Chisso Corporation
- 当前专利权人地址： 6-32, Nakanoshima 3-chome Kita-ku Osaka-shi Osaka-fu JP
- 代理机构： Brauns, Hans-Adolf, Dr. rer. nat.
- 优先权： JP86715/89 19890407
- 主分类号： C09K19/42
- IPC分类号： C09K19/42 ; G02F1/137
摘要：
This invention relates to a ferroelectric liquid crystal composition exhibiting an Sc* phase over a wide temperature range including room temperature and having a spontaneous polarization value of 30 nC/cm² or less and a quick response, i.e., a response time of 100 µsec or less, and also to an optical switching element comprising the ferroelectric liquid crystal composition. The ferroelectric liquid crystal composition comprises the following three components of A, B and C in respective amounts of 75 to 95 % by weight, 3 to 9 % by weight and 3 to 12 % by weight based on the total amount of the components A, B and C and having a phase sequence series of an isotropic liquid, a cholesteric phase, a smectic A phase and a chiral smectic C phase in that order from the high temperature side and a spontaneous polarization value of 30 nC/cm² or less.
The component A is at least one compound selected from the group consisting of compounds represented by the general formulae:
The component B is at least one compound selected from the group consisting of compounds represented by the general formulae:
The component C is at least one compound selected from the group consisting of compounds represented by the general formula:
In the above formulae, R¹ to R¹⁰, X, m, n and * are as defined in the claims.
The component A is at least one compound selected from the group consisting of compounds represented by the general formulae:
The component B is at least one compound selected from the group consisting of compounds represented by the general formulae:
The component C is at least one compound selected from the group consisting of compounds represented by the general formula:
In the above formulae, R¹ to R¹⁰, X, m, n and * are as defined in the claims.
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