发明授权
- 专利标题: Polarizing plate, manufacturing method thereof, optical film and image display
- 专利标题(中): 偏光板,其制造方法,光学膜和图像显示
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申请号: US12744601申请日: 2008-11-19
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公开(公告)号: US08551612B2公开(公告)日: 2013-10-08
- 发明人: Megumi Katou , Hiroaki Mizushima , Mie Nakata , Takemichi Yoshida
- 申请人: Megumi Katou , Hiroaki Mizushima , Mie Nakata , Takemichi Yoshida
- 申请人地址: JP Ibaraki-shi, Osaka JP Osaka-shi
- 专利权人: Nitto Denko Corporation,Nippon Shokubai Co., Ltd.
- 当前专利权人: Nitto Denko Corporation,Nippon Shokubai Co., Ltd.
- 当前专利权人地址: JP Ibaraki-shi, Osaka JP Osaka-shi
- 代理机构: Westerman, Hattori, Daniels & Adrian, LLP
- 优先权: JP2007-310905 20071130
- 国际申请: PCT/JP2008/070990 WO 20081119
- 国际公布: WO2009/069516 WO 20090604
- 主分类号: G02F1/1335
- IPC分类号: G02F1/1335 ; G02B5/30 ; B32B37/12
摘要:
A polarizing plate of the present invention includes a polyvinyl alcohol-based polarizer; and transparent protective films provided on both sides of the polarizer with an adhesive layer interposed between the polarizer and each transparent protective film, wherein the transparent protective film on one side comprises a lactone ring structure-containing (meth)acrylic resin and has an in-plane retardation of less than 40 nm and a thickness direction retardation of less than 80 nm, and the transparent protective film on the other side is a retardation plate that comprises a cellulose ester and satisfies the relation: nx>ny>nz, wherein nx is a refractive index in an X-axis direction where the in-plane refractive index is maximum, ny is a refractive index in a Y-axis direction perpendicular to the X-axis, and nz is a refractive index in a Z-axis direction corresponding to the thickness direction. The polarizing plate can satisfy durability and display uniformity (unevenness).
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