发明授权
- 专利标题: Display optical system
- 专利标题(中): 显示光学系统
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申请号: US11433352申请日: 2006-05-15
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公开(公告)号: US07287865B2公开(公告)日: 2007-10-30
- 发明人: Soon Hyung Kwon
- 申请人: Soon Hyung Kwon
- 申请人地址: KR Seoul
- 专利权人: LG Electronics Inc.
- 当前专利权人: LG Electronics Inc.
- 当前专利权人地址: KR Seoul
- 代理机构: Ked & Associates, LLP
- 优先权: KR2003-12292 20030227
- 主分类号: G03B21/28
- IPC分类号: G03B21/28 ; G02F1/00
摘要:
A projection type display optical system is provided to resolve problems of keystone distortion, and to improve illumination efficiency and contrast uniformity of an image. The projection type display optical system includes: a light source; DMD as an image display means to which an emitting light ray from the light source is irradiated; and an illumination unit installed in between the light source and the image display means, and comprising: a rod lens operating as an optical device for unifying the brightness distribution of an incident light ray from the light source and emitting the brightness unified light ray; a first lens for transmitting the emitted light ray by the rod lens; a second lens on which the transmitted light ray from the first lens incidents; and a projection part for magnifying and projecting an image formed on the image display means onto a screen, wherein the first and second lenses are set in such a manner that an optical axis of the second lens and an optical axis of the first lens do not coincide with each other, whereby a surface image that is formed when an emitted surface of the rod lens transmits the first and second lens groups is not inclined to the surface of the image display means.
公开/授权文献
- US20060203201A1 Display optical system 公开/授权日:2006-09-14