Invention Grant
- Patent Title: Image projector
- Patent Title (中): 图像投影仪
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Application No.: US11587699Application Date: 2005-04-06
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Publication No.: US07677738B2Publication Date: 2010-03-16
- Inventor: Muneharu Kuwata , Tomohiro Sasagawa , Kuniko Kojima , Akihiro Yamada
- Applicant: Muneharu Kuwata , Tomohiro Sasagawa , Kuniko Kojima , Akihiro Yamada
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2004-130862 20040427
- International Application: PCT/JP2005/006757 WO 20050406
- International Announcement: WO2005/106560 WO 20051110
- Main IPC: G03B21/28
- IPC: G03B21/28 ; G02B3/00 ; G02B9/00

Abstract:
According to the present invention, an image projector includes a reflecting light valve, a group of refracting lenses forming a projecting optical system that enlarges and projects an optical image given from the light valve, a power mirror having a power and forming the projecting optical system together with the group of refracting lenses, and a transmissive screen for displaying the optical image that is given from the light valve and enlarged by the projecting optical system, wherein the exit pupil position is set such that the minimum angle of view θmin exceeds 40°, and the Petzval partial sum of lenses is set larger than a value determined by the minimum angle of view.
Public/Granted literature
- US20070229779A1 Image Projector Public/Granted day:2007-10-04
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