发明授权
- 专利标题: Projection-type picture display apparatus and screen used thereby
- 专利标题(中): 投射型图像显示装置和使用的画面
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申请号: US10827338申请日: 2004-04-20
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公开(公告)号: US07023616B2公开(公告)日: 2006-04-04
- 发明人: Koji Hirata , Shigeru Inaoka
- 申请人: Koji Hirata , Shigeru Inaoka
- 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
- 代理机构: Antonelli, Terry, Stout and Kraus, LLP
- 优先权: JP10-282261 19981005
- 主分类号: G03B21/56
- IPC分类号: G03B21/56 ; G03B21/60
摘要:
A screen for allowing light generated by a light source and modulated by a picture display device having pixels laid out to form a matrix to produce an image thereon to be projected on the screen as an enlarged picture. The screen has a Fresnel lens sheet forming Fresnel lenses at an emission side, a first member for receiving light emitted from the Fresnel lens sheet having light passing windows, and a plurality of light absorbing layers and a second member placed on the emission side of the first member. A pitch of the light absorbing layers is made smaller than a pitch in a first direction of pixels projected and enlarged on the screen, and a pitch in a second direction of the pixels is at least twice of a pitch of the Fresnel lenses.
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