发明授权
- 专利标题: Birefringent optical film, elliptically polarizing plate using the same, and liquid crystal display using the same
- 专利标题(中): 双折射光学膜,使用其的椭圆偏光板和使用其的液晶显示器
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申请号: US10736978申请日: 2003-12-17
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公开(公告)号: US07153547B2公开(公告)日: 2006-12-26
- 发明人: Yuuichi Nishikouji , Nao Murakami , Masaki Hayashi , Hiroyuki Yoshimi
- 申请人: Yuuichi Nishikouji , Nao Murakami , Masaki Hayashi , Hiroyuki Yoshimi
- 申请人地址: JP Ibaraki
- 专利权人: Nitto Denko Corporation
- 当前专利权人: Nitto Denko Corporation
- 当前专利权人地址: JP Ibaraki
- 代理机构: Westerman, Hattori Daniels & Adrian LLP
- 优先权: JP2002-368898 20021219
- 主分类号: G02F1/1335
- IPC分类号: G02F1/1335 ; C09K19/00 ; B32B27/36
摘要:
The present invention provides a birefringent optical film having a high orientation for easily obtaining a desired retardation value and also a small photoelastic coefficient. The birefringent optical film includes at least two kinds of polymer materials. A total of products of Cn and Wn satisfies a numerical formula (1): Σ(Cn×Wn)≦30×10−8 cm2/N (1) where Cn and Wn denote respectively a photoelastic coefficient and a volume fraction of each polymer material, and at least one of the polymer materials of the film has a photoelastic coefficient value of at least 60×10−8 cm2/N.
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