发明申请
- 专利标题: Image display, Fresnel lens and screen
- 专利标题(中): 图像显示,菲涅尔透镜和屏幕
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申请号: US11513523申请日: 2006-08-30
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公开(公告)号: US20070146877A1公开(公告)日: 2007-06-28
- 发明人: Daisuke Imafuku , Hiroki Yoshikawa , Tetsu Ohishi
- 申请人: Daisuke Imafuku , Hiroki Yoshikawa , Tetsu Ohishi
- 申请人地址: JP Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JP Tokyo
- 优先权: JP2005-369022 20051222
- 主分类号: G03B21/60
- IPC分类号: G03B21/60
摘要:
In a Fresnel screen for displaying an image, comprising, a screen surface, and a reverse surface opposite to the screen surface in a thickness direction of the screen to be prevented from facing to the viewer, the Fresnel screen has first prism surfaces extending to have respective longitudinal arc-shapes juxtaposed with each other as seen in the thickness direction to deflect light beams for forming the image in at least one of directions perpendicular to each other as seen in the thickness direction, and second prism surfaces extending to have respective longitudinal shapes juxtaposed with each other as seen in the thickness direction to deflect at least a part of the light beams in at least one of the directions perpendicular to each other as seen in the thickness direction.
公开/授权文献
- US07529023B2 Image display, Fresnel lens and screen 公开/授权日:2009-05-05
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