发明授权
- 专利标题: Image display apparatus
- 专利标题(中): 图像显示装置
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申请号: US11701826申请日: 2007-02-02
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公开(公告)号: US07385742B2公开(公告)日: 2008-06-10
- 发明人: Takeshi Endo , Tetsuya Noda , Yasushi Tanijiri
- 申请人: Takeshi Endo , Tetsuya Noda , Yasushi Tanijiri
- 申请人地址: JP Osaka
- 专利权人: Minolta Co., Ltd.
- 当前专利权人: Minolta Co., Ltd.
- 当前专利权人地址: JP Osaka
- 代理机构: Sidley Austin LLP
- 优先权: JP2002-197518 20020705
- 主分类号: G02B5/32
- IPC分类号: G02B5/32
摘要:
An image display apparatus has: a display element for displaying an image; a light source section for supplying an illumination light to the display element; a reflection type hologram for diffracting and reflecting the illumination light so as to guide the illumination light to the display element; and an eyepiece optical system for guiding an image light from the display element to an eye of a viewer so as to provide an enlarged virtual image of the image. The reflection type hologram has diffusing properties. Since the reflection type hologram diffuses the illumination light, an incident angle of the illumination light with respect to the display element is widened to a certain extent. Since the display element does not change a propagating direction of a light ray, a propagating direction of the image light is widened similarly to widening of the incident angle, thereby enlarging the observation pupil.
公开/授权文献
- US20070133076A1 Image display apparatus 公开/授权日:2007-06-14