发明授权
- 专利标题： Liquid crystal display comprising liquid crystal cell, linearly polarizing membrane, cholesteric liquid crystal layer and quarter wave plate
- 专利标题（中）： 液晶显示器包括液晶单元，线偏振膜，胆甾型液晶层和四分之一波片
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申请号： US09705825申请日： 2000-11-06
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公开(公告)号： US06519017B1公开(公告)日： 2003-02-11
- 发明人: Mitsuyoshi Ichihashi , Ken Kawata , Kohei Arakawa
- 申请人： Mitsuyoshi Ichihashi , Ken Kawata , Kohei Arakawa
- 优先权： JP11-369114 19991227
- 主分类号： G02F11335
- IPC分类号： G02F11335
摘要：
A liquid crystal display comprises a liquid crystal cell, a linearly polarizing membrane, a cholesteric liquid crystal layer and a quarter wave plate. The cholesteric liquid crystal layer is divided into two or more areas having different spiral pitches of cholesteric liquid crystal. The quarter wave plate comprises an optically anisotropic layer A and an optically anisotropic layer B. One of the optically anisotropic layers A and B is formed from liquid crystal molecules. The other is formed from liquid crystal molecules or made of a polymer film. The quarter wave plate gives a retardation value per wavelength within the range of 0.2 to 0.3 at each wavelength of 480 nm, 550 nm and 630 nm.
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