发明授权
- 专利标题: Rear-surface projection-type video display apparatus
- 专利标题(中): 背面投影式视频显示装置
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申请号: US13091501申请日: 2011-04-21
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公开(公告)号: US08384995B2公开(公告)日: 2013-02-26
- 发明人: Koji Hirata , Hidehiro Ikeda , Toshihiko Matsuzawa , Tadashi Sato
- 申请人: Koji Hirata , Hidehiro Ikeda , Toshihiko Matsuzawa , Tadashi Sato
- 申请人地址: JP Tokyo
- 专利权人: Hitachi Consumer Electronics Co., Ltd.
- 当前专利权人: Hitachi Consumer Electronics Co., Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: McDermott Will & Emery LLP
- 优先权: JP2010-128391 20100604
- 主分类号: G03B21/60
- IPC分类号: G03B21/60
摘要:
A rear-type projection board apparatus (rear-surface projection-type video display apparatus), of new structure, having no necessity of a housing, being superior in portability, cheaply producible, comprises a transmission-type screen, being disposed within an interior space, under a condition of exposing both surfaces thereof in the space, and for transmitting a visual light projected onto a rear surface therethrough, so as to display it on a video display surface on a front surface, and a video projection apparatus (projector), being disposed at a predetermined position on a rear surface side of the transmission-type screen, and for projecting the visual light from a rear surface of the transmission-type screen, enlargedly, wherein the transmission-type screen has a Fresnel lens having Fresnel lens surfaces, covering over an entire light receiving surface for receiving the visual light, which is enlargedly projected from the video projection apparatus, whereby guiding the visual light received from the video projection apparatus into a direction perpendicular to the video display surface, while guiding external lights within the interior space downwards.
公开/授权文献
- US20110298993A1 REAR-SURFACE PROJECTION-TYPE VIDEO DISPLAY APPARATUS 公开/授权日:2011-12-08
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