发明申请
- 专利标题: Optical element, light condensation backlight system, and liquid crystal display
- 专利标题(中): 光学元件,光聚合背光系统和液晶显示器
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申请号: US10576614申请日: 2004-08-24
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公开(公告)号: US20070132914A1公开(公告)日: 2007-06-14
- 发明人: Naoki Takahashi , Kazutaka Hara , Miki Shiraogawa , Kentarou Takeda
- 申请人: Naoki Takahashi , Kazutaka Hara , Miki Shiraogawa , Kentarou Takeda
- 申请人地址: JP Ibaraki-shi
- 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-shi
- 优先权: JP2003-363220 20031023
- 国际申请: PCT/JP04/12119 WO 20040824
- 主分类号: G02F1/1335
- IPC分类号: G02F1/1335
摘要:
An optical element comprising: a polarizing element (A), separating incident light into polarization to then emit light, and made of a cholesteric liquid crystal, and a linearly polarized light reflection polarizer (B) transmitting linearly polarized light with one polarization axis and selectively reflecting linearly polarized light with the other polarization axis perpendicular to the one polarization axis, wherein the polarizing element (A) has a distortion rate with respect to emitting light to incident light in the normal direction of 0.5 or more and a distortion rate with respect to emitting light to incident light at an angle inclined from the normal direction by 60 degrees or more of 0.2 or less, the polarizing element (A) has a function increasing a linearly polarized light component of emitting light as incidence angle is larger; is capable of condensation and collimation of incident light from a light source and capable of suppressing transmission of light in an arbitrary direction.