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    Azine derivative, process for the preparation thereof, nematic liquid crystal composition and liquid crystal display system comprising same
    1.
    发明公开
    Azine derivative, process for the preparation thereof, nematic liquid crystal composition and liquid crystal display system comprising same 失效
    吖嗪衍生物，其制备方法，含有向列型液晶组合物和液晶显示装置

    公开(公告)号：EP0825176A1

    公开(公告)日：1998-02-25

    申请号：EP97114465.4

    申请日：1997-08-21

    申请人： DAINIPPON INK AND CHEMICALS, INC.

    发明人： Takatsu, Haruyoshi ,  Takehara, Sadao ,  Takeuchi, Kiyofumi ,  Negishi, Makoto ,  Osawa, Norie ,  Osawa, Masashi ,  Ogawa, Shinji ,  Yanagihara, Hirokazu

    IPC分类号： C07C251/24 ,  C09K19/24 ,  C09K19/30

    CPC分类号： C09K19/42 ,  C07C251/88 ,  C07C2601/14 ,  C09K19/24 ,  C09K19/3086 ,  C09K19/46

    摘要： Disclosed is to provide an azine derivative as a novel liquid crystal compound, a novel process for the preparation of an asymmetrical azine in a high reaction yield with an extremely small amount of by-products such as symmetrical azines, a nematic liquid crystal composition containing the azine derivative which exhibits a broad driving temperature range and an excellent response for the desired high birefringence index, a liquid crystal display device such as TN-LCD, STN-LCD and TFT-LCD having improved electro-optical properties comprising the liquid crystal composition as a constituent material, and a light-scattering type liquid crystal display system which exhibits a suppressed memory phenomenon, a higher uniformity in turbidity for display and improved display properties and response against temperature change while maintaining and improving the required display properties such as fast switching time, lower voltage driving, higher light-control layer resistivity and higher contrast ratio even in the foregoing light-scattering type liquid crystal display system.

    摘要翻译： 公开的是提供对吖嗪衍生物作为新型液晶化合物，一种用于在高的反应产率制备的非对称吖嗪类的含有副产物的极微量的新方法：如对称吖嗪类，向列型液晶组合物含有的 其表现出宽的驱动温度范围，并对于所需的高双折射率，液晶显示装置的优异的响应吖嗪衍生物：如TN-LCD，STN-LCD和TFT-LCD具有改善的电光学特性，包括该液晶组合物作为 的构成材料，以及一个光散射型液晶显示系统，同时保持和提高所需的显示属性表现出受抑制的记忆现象，在浊度为显示更高的均匀性和改善的显示特性和对温度变化的响应：如几乎切换时间 ，较低的电压驱动，高光控制层的电阻率和较高的反向 甚至在前述的光散射型液晶显示系统St比值。