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    • 2. 发明授权
    • Liquid crystal composition, liquid crystal device using the composition,
liquid crystal apparatus and display method
    • 液晶组合物,使用组合物的液晶装置,液晶装置和显示方法
    • US5688437A
    • 1997-11-18
    • US422262
    • 1995-04-14
    • Koichi SatoHiroyuki KitayamaKenji ShinjoKatsutoshi NakamuraShinichi Nakamura
    • Koichi SatoHiroyuki KitayamaKenji ShinjoKatsutoshi NakamuraShinichi Nakamura
    • C09K19/34C09K19/12C09K19/20C09K19/32
    • C09K19/34
    • A liquid crystal composition includes a liquid crystal containing at least one mesomorphic compound having a cholesteric phase (Ch phase)-free mesomorphic phase, and at least one compound (e) having a limit of solubility in the liquid crystal and being contained in the composition in a proportion ranging from 20% of the limit of solubility to below the limit of solubility. The liquid crystal composition may preferably include the liquid crystal containing at least one fluorine-containing mesomorphic compound (a) having a fluorocarbon terminal portion and a hydrocarbon terminal portion, and at least one achiral compound (b), a the compound (e), having a specific ring structure and a specific terminal alkyl group free from a perfluorocarbon atom. The compound having a Ch phase-free mesomorphic phase, preferably the compound (a), and the compound (e), preferably the compound (b) are effective in providing the liquid crystal composition with a layer structure of so-called bookshelf or a layer structure having a small inclination angle (closer to bookshelf structure). The liquid crystal composition is useful in improving response characteristics and display characteristics, particularly a contrast ratio, of a liquid crystal device using the liquid crystal composition.
    • 液晶组合物包括含有至少一种具有胆甾型相(Ch相) - 自由相态的介晶化合物的液晶和至少一种在液晶中具有极限溶解性并包含在该组合物中的化合物(e) 其比例范围从溶解度的20%到低于溶解度的极限。 液晶组合物可以优选包含含有至少一种含氟碳末端部分和烃末端部分的含氟介晶化合物(a)的液晶,以及至少一种非手性化合物(b),化合物(e), 具有特定的环结构和不含全氟化碳原子的特定末端烷基。 具有Ch相无介晶相的化合物,优选化合物(a)和化合物(e),优选化合物(b))有效地为所述液晶组合物提供所谓书架或 层结构具有较小的倾斜角度(更靠近书架结构)。 液晶组合物可用于改善使用液晶组合物的液晶装置的响应特性和显示特性,特别是对比度。