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    • 6. 发明授权
    • Ferroelectric liquid crystal device and treatment method therefor
    • 铁电液晶装置及其处理方法
    • US5790223A
    • 1998-08-04
    • US552276
    • 1995-11-02
    • Yukio HanyuAkira TsuboyamaOsamu TaniguchiTadashi MiharaKatsutoshi NakamuraSunao Mori
    • Yukio HanyuAkira TsuboyamaOsamu TaniguchiTadashi MiharaKatsutoshi NakamuraSunao Mori
    • G02F1/1337G02F1/141G02F1/13
    • G02F1/1416G02F2001/133746
    • A ferroelectric liquid crystal device is constituted by disposing a ferroelectric liquid crystal between a pair of substrates having thereon electrodes for voltage application and provided with uniaxial alignment axes, as by rubbing, so as to provide a high pretilt angle of at least 10 degrees. A problematic liquid crystal movement in such a high-pretilt angle ferroelectric liquid crystal device is suppressed by improving a smectic layer structure therein, inclusive of a symmetry of pretilt angles at the pair of substrate boundary surfaces. Such an improved smectic layer structure is accomplished by a realigning treatment after cooling to the chiral smectic phase or in the final stage of the cooling to the chiral smectic phase as by application of an AC electric field and/or by repetitive heating-cooling in the chiral smectic phase. The improved smectic layer structure is represented by, e.g., an X-ray diffraction peak having an increased peak area and/or a decreased half-value width.
    • 铁电液晶装置是通过将铁电液晶设置在其上具有用于施加电压的一对基板和通过摩擦而设置有单轴对准轴的一对基板之间,以提供至少10度的高预倾角。 通过改善其中的近晶层结构,包括一对基板界面处的预倾角的对称性,可以抑制这种高预倾角铁电液晶装置中的有问题的液晶运动。 这种改进的近晶层结构是通过在冷却到手性近晶相之后或在冷却到手性近晶相的最后阶段中的重新对准处理来实现的,如通过施加AC电场和/或通过反复加热冷却 手性近晶相。 改进的近晶层结构由例如具有增加的峰面积和/或半值宽度减小的X射线衍射峰表示。