发明授权
US5245456A Birefringent film with n.sub.x >n.sub.z >n.sub.y, process for producing
the same, retardation film, elliptically polarizing plate, and liquid
crystal display
失效
具有NX> NZ> NY的双面胶卷,其制造方法,延展膜,非极性极化板和液晶显示
- 专利标题: Birefringent film with n.sub.x >n.sub.z >n.sub.y, process for producing the same, retardation film, elliptically polarizing plate, and liquid crystal display
- 专利标题(中): 具有NX> NZ> NY的双面胶卷,其制造方法,延展膜,非极性极化板和液晶显示
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申请号: US780938申请日: 1991-10-23
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公开(公告)号: US5245456A公开(公告)日: 1993-09-14
- 发明人: Hiroyuki Yoshimi , Tatsuki Nagatsuka , Yasuo Fujimura , Tatsuya Osuka
- 申请人: Hiroyuki Yoshimi , Tatsuki Nagatsuka , Yasuo Fujimura , Tatsuya Osuka
- 申请人地址: JPX Osaka
- 专利权人: Nitto Denko Corporation
- 当前专利权人: Nitto Denko Corporation
- 当前专利权人地址: JPX Osaka
- 优先权: JPX2-286646 19901024; JPX3-287174 19911007
- 主分类号: G02B5/30
- IPC分类号: G02B5/30 ; G02F1/13363
摘要:
A birefringent film in which molecules oriented in a direction parallel to the film plane and molecules oriented in the direction of the thickness of the film are present in a mixed state. Also, a process for producing the birefringent film, which comprises laminating a resin film on one or both sides thereof with a shrinkable film, thereby preparing a laminate, and then heat stretching the laminate, thereby performing stretching treatment of the resin film while imparting to the resin film the ability to shrink in the direction crossing the stretching direction. A retardation film is formed by using at least one birefringent film and has refractive indexes, n.sub.x and n.sub.y, in two directions parallel to the plate plane and crossing each other at right angles and a refractive index, n.sub.z, in the direction of the thickness of the plate, said refractive indexes n.sub.x, n.sub.y, and n.sub.z satisfying the following equation:0 n.sub.y. Also, an elliptically polarizing plate comprises a laminate of the retardation film with a polarizing plate. Additionally, a liquid crystal display comprises a liquid crystal cell and a polarizing plate disposed at least on one side of said liquid crystal cell through the retardation film.
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