发明授权
- 专利标题: Rear projection type display system
- 专利标题(中): 背投型显示系统
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申请号: US401253申请日: 1995-03-09
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公开(公告)号: US5611611A公开(公告)日: 1997-03-18
- 发明人: Masanori Ogino , Yoshiaki Iwahara , Shoji Kuroda , Shuichi Sakamoto , Takashi Itoh , Makoto Kamiya
- 申请人: Masanori Ogino , Yoshiaki Iwahara , Shoji Kuroda , Shuichi Sakamoto , Takashi Itoh , Makoto Kamiya
- 申请人地址: JPX Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX6-241037 19941005; JPX6-262205 19941026
- 主分类号: G03B21/62
- IPC分类号: G03B21/62 ; G03B21/60
摘要:
A rear projection type display system with a transmissive screen. A transparent reinforcing plate is coupled to a lenticular sheet of the screen on the light output side by a connective member to broaden the horizontal diverging angle by 60 degrees or more to the right and left sides. The duty factor of a black stripe formed on the lenticular sheet is set to 60% or more so improve the contrast of an image. The diverging angle at each point of a vertically-diffusing lens for diverging light in the vertical direction is modulated in accordance with the height of each point to offer a proper visual angle range in the vertical direction.