Liquid crystal display device and phase plate therefor
    1.
    发明授权
    Liquid crystal display device and phase plate therefor 失效
    液晶显示装置及其相位板

    公开(公告)号:US5220447A

    公开(公告)日:1993-06-15

    申请号:US494551

    申请日:1990-03-16

    摘要: A liquid crystal display device comprising: a liquid crystal display element formed by holding, between two substrates at least one of which has a light-permeable electrode, a liquid crystal layer in which liquid crystal molecules of a nematic liquid crystal having positive dielectric anisotropy and containing an optically active substance has a helical axis perpendicular to the substrates between the substrates and are helically oriented, and the liquid crystal molecules between the substrates have a twist angle of 180 to 270 degrees, and a phase plate formed by stacking water surface development films of an organic polymer with changing the orientation axes thereof at a constant angle, wherein the contrast ratio, a ratio between brightness in white display and brightness in black display, is remarkably excellent over that of a device obtained by stacking plastic films, and the transmissivity, a quotient of background brightness and light source brightness, is equivalent to that of a conventional double layer structure liquid crystal display device.

    摘要翻译: 一种液晶显示装置,包括:液晶显示元件,其通过在其中至少一个具有透光性电极的两个基板之间保持其液晶层,其中具有正介电各向异性的向列型液晶的液晶分子和 含有光学活性物质的螺旋轴具有垂直于基板之间的基板的螺旋轴并且被螺旋取向,并且基板之间的液晶分子具有180至270度的扭曲角度,并且通过将水表面显影膜 的有机聚合物以恒定角度改变其取向轴,其中对比度,白色显示中的亮度与黑色显示中的亮度之间的比例,显着优于通过堆叠塑料膜获得的装置的透射率 ,背景亮度和光源亮度的商相当于a 常规双层结构液晶显示装置。