发明授权
- 专利标题: Transmissive screen and rear projector
- 专利标题(中): 透射屏幕和后投影机
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申请号: US10647302申请日: 2003-08-26
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公开(公告)号: US07167306B2公开(公告)日: 2007-01-23
- 发明人: Masafumi Sakaguchi , Hideto Yamashita
- 申请人: Masafumi Sakaguchi , Hideto Yamashita
- 申请人地址: JP Tokyo
- 专利权人: Seiko Epson Corporation
- 当前专利权人: Seiko Epson Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Oliff & Berridge, PLC
- 优先权: JP2002-255256 20020830; JP2003-062066 20030307
- 主分类号: G03B21/60
- IPC分类号: G03B21/60 ; G03B21/56
摘要:
The present invention provides an excellent transmissive screen allowing a well-balanced increase in the vertical, horizontal, and oblique viewing angle characteristics for enhancing the viewing angle characteristics, and a rear projector including the transmissive screen. A transmissive screen can include a Fresnel lens portion having Fresnel lens components on its light-exiting surface, and a microlens array portion disposed at the light-exiting surface side of the Fresnel lens portion and having many microlenses on its light-incident surface. The microlenses of the microlens array portion are arrayed vertically and horizontally such that adjacent microlenses have common sides and the microlens array portion is rotated by 45°.
公开/授权文献
- US20040075900A1 Transmissive screen and rear projector 公开/授权日:2004-04-22
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