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    • 1. 发明授权
    • Optically anisotropic film
    • 光学各向异性薄膜
    • US5736066A
    • 1998-04-07
    • US555807
    • 1995-11-09
    • Takanobu NoguchiToshihiro OhnishiMichitaka MorikawaMasato Kuwabara
    • Takanobu NoguchiToshihiro OhnishiMichitaka MorikawaMasato Kuwabara
    • G02B5/30G02F1/13363C09K19/52C09K19/00
    • G02F1/13363G02B5/3016G02F2001/133633G02F2001/133637G02F2203/21
    • The present invention provides an optically anisotropic film characterized in that the retardation at 80.degree. C. is 20-97% of that at 30.degree. C., and the film is made from a mixture of a transparent or semitransparent polymer and at least one liquid crystal compound, wherein the ratio of the liquid crystal compound in the mixture is 0.5-50% by weight based on the combined weight of the liquid crystal compound and the polymer, or an optically anisotropic film characterized in that the retardation at 60.degree. C. is 50-99% of that at 30.degree. C., and the film comprises a mixture of a transparent or semitransparent polymer and at least one liquid crystal compound, wherein the ratio of the liquid crystal compound in the mixture is 0.5-50% by weight based on the combined weight of the liquid crystal compound and the polymer. These optically anisotropic films have a temperature dependence of retardation corresponding to that of the liquid crystal display cell used in combination with the film, show a temperature compensating effect, and are also excellent in viewing angle characteristics and display performance, so that they can be used for the production of composite optically anisotropic films or liquid crystal display devices.
    • 本发明提供一种光学各向异性膜,其特征在于在80℃下的延迟是在30℃下的延迟的20-97%,并且该膜由透明或半透明聚合物和至少一种液体 晶体化合物,其中液晶化合物在液晶化合物和聚合物的组合重量中的比例为0.5-50重量%,或者是在60℃下的延迟的光学各向异性膜。 在30℃下为50-99%,膜包含透明或半透明聚合物和至少一种液晶化合物的混合物,其中混合物中液晶化合物的比例为0.5-50% 基于液晶化合物和聚合物的组合重量。 这些光学各向异性膜具有与膜结合使用的液晶显示元件的延迟的温度依赖性,显示出温度补偿效果,并且也具有优异的视角特性和显示性能,因此可以使用它们 用于生产复合光学各向异性膜或液晶显示装置。
    • 2. 发明授权
    • Process for producing phase retarder film
    • 生产相延迟膜的方法
    • US5474731A
    • 1995-12-12
    • US226465
    • 1994-04-12
    • Michitaka MorikawaKoji HigashiTadashi Shindo
    • Michitaka MorikawaKoji HigashiTadashi Shindo
    • G02B5/30G02F1/13363B29C61/02
    • G02B5/3083G02F1/13363Y10S264/71
    • A process for continuously producing a phase retarder film or sheet comprising continuously supplying a stretched thermoplastic resin film or sheet to a heating zone in parallel with the stretching direction of the film or sheet and heating the film or sheet to a temperature not lower than the glass transition temperature of the resin while applying pressure to the surface of the film or sheet passing through the heating zone, thereby continuously subjecting the film or sheet to thermal relaxation while suppressing the expansion of the film or sheet in a direction parallel to the surface of the film or sheet and perpendicular to the stretching axis. According to the present invention, a phase retarder film or sheet having a low angular dependence of retardation can be produced continuously. By using the phase retarder film(s) or sheet(s) thus obtained as optical compensator(s), the viewing angle characteristics of liquid crystal display devices can remarkably be improved.
    • 一种连续制造延迟片或薄片的方法,包括将拉伸的热塑性树脂薄膜或片材与薄膜或片材的拉伸方向平行地连续地供给到加热区域,并将薄膜或薄片加热到不低于玻璃的温度 同时向通过加热区域的膜或片的表面施加压力,从而连续地对膜或片进行热松弛,同时抑制膜或片在平行于该表面的方向上的膨胀 膜或片材并垂直于拉伸轴。 根据本发明,可以连续地制造具有低延迟角度依赖性的相位延迟片或片。 通过使用如此获得的相位延迟膜或片作为光学补偿器,可以显着提高液晶显示装置的视角特性。