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    • 2. 发明授权
    • Liquid crystal display device
    • 液晶显示装置
    • US06669865B1
    • 2003-12-30
    • US09696282
    • 2000-10-26
    • David CoatesSimon GreenfieldMark GouldingJames HanmerShirley MardenOwain Llyr Parri
    • David CoatesSimon GreenfieldMark GouldingJames HanmerShirley MardenOwain Llyr Parri
    • C09K1938
    • C09K19/38C09K2219/03G02B5/3016G02F1/133528Y10T428/1041
    • A liquid crystal display device containing a liquid crystal cell and at least one reflective polarizer or a polarizer combination having at least one reflective polarizer as a means to generate circular polarized light. The reflective polarizer includes an optically active layer of an anisotropic polymer material with a helically twisted planar molecular orientation. The material is oriented so that the axis of the molecular helix extends transversely to the layer, and the pitch of the molecular helix is varied in such a manner that the difference between the maximum pitch and the minimum pitch is at least 100 nm. The reflective polarizer is obtainable by copolymerization of a mixture of a chiral polymerizable mesogenic material including a) at least one achiral polymerizable mesogenic compound having at least one polymerizable functional group in the presence of b) at least one chiral polymerizable mesogenic compound having one polymerizable functional group and/or at least one non-polymerizable chiral mesogenic compound, c) an initiator, d) optionally a non-mesogenic compound having at least one polymerizable functional group, e) optionally a dye and, i) optionally a stabilizer. The invention also discloses methods of manufacturing such a reflective polarizer. The invention further discloses a mixture of a chiral polymerizable mesogenic material used for manufacturing such a reflective polarizer.
    • 一种液晶显示装置,其包含液晶单元和至少一个反射偏振器或具有至少一个反射偏振器的偏振器组合,作为产生圆偏振光的手段。 反射偏振器包括具有螺旋扭曲的平面分子取向的各向异性聚合物材料的光学活性层。 该材料被定向成使得分子螺旋线的轴线横向延伸,并且分子螺旋线的间距以最大间距和最小间距之差至少为100nm的方式变化。 反射型偏振片可通过手性可聚合介晶材料的混合物共聚获得,该混合物包括:a)至少一种具有至少一个可聚合官能团的非手性可聚合介晶化合物,其中b)至少一种具有一个可聚合官能团的手性可聚合介晶化合物 基团和/或至少一种不可聚合的手性介晶化合物,c)引发剂,d)任选的具有至少一个可聚合官能团的非介晶化合物,e)任选的染料和i)任选的稳定剂。 本发明还公开了制造这种反射偏振器的方法。 本发明还公开了用于制造这种反射偏振器的手性可聚合介晶材料的混合物。