发明申请
- 专利标题： Projection type screen and image projection system
- 专利标题（中）： 投影型屏幕和图像投影系统
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申请号： US11352245申请日： 2006-02-13
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公开(公告)号： US20060181771A1公开(公告)日： 2006-08-17
- 发明人: Kazuki Taira
- 申请人： Kazuki Taira
- 专利权人： KABUSHIKI KAISHA TOSHIBA
- 当前专利权人： KABUSHIKI KAISHA TOSHIBA
- 优先权： JPP2005-036574 20050214
- 主分类号： G02B5/30
- IPC分类号： G02B5/30
摘要：
A first polarizer transmits incident light of a first polarized direction and absorbs incident light of a polarized direction different from the first polarized direction. A birefringent film layer rotates a polarized direction of light of a predetermined wavelength to a second polarized direction different from the first polarized direction in a light transmitted through the first polarizer. A second polarizer transmits light of the first polarized direction and reflects a light of the second polarized direction in a light transmitted through the birefringent film layer. A substrate absorbs light transmitted through the second polarizer.