发明申请
US20080204868A1 Screen, Fresnel Lens Sheet Used For The Same, And Image Display Apparatus Using The Same
失效
屏幕,用于相同的菲涅尔透镜片,以及使用它的图像显示装置
- 专利标题: Screen, Fresnel Lens Sheet Used For The Same, And Image Display Apparatus Using The Same
- 专利标题(中): 屏幕,用于相同的菲涅尔透镜片,以及使用它的图像显示装置
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申请号: US12103241申请日: 2008-04-15
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公开(公告)号: US20080204868A1公开(公告)日: 2008-08-28
- 发明人: Hiroki YOSHIKAWA , Tetsu Ohishi , Koji Hirata , Daisuke Imafuku
- 申请人: Hiroki YOSHIKAWA , Tetsu Ohishi , Koji Hirata , Daisuke Imafuku
- 优先权: JP2004-031502 20040209; JP2004-187229 20040625
- 主分类号: G03B21/60
- IPC分类号: G03B21/60
摘要:
An image display apparatus includes an image generation source, optics for projecting in an enlarged form the image generated by the image generation source, and a transmissive screen for displaying the image projected from said optics. The transmissive screen includes a Fresnel lens sheet disposed at an image generation source side, and a diffusing sheet disposed at an image-watching side in order to diffuse image light at least in a horizontal direction of the screen. The Fresnel lens sheet has a plurality of entrance-side prisms formed at the image generation source side, and a plurality of exit-side prisms formed at the image-watching side, and the Fresnel lens sheet emits lights in a first direction and a second direction. The first direction is almost parallel to a central axis of the Fresnel lens sheet, and the second direction extends toward the central axis.