Invention Grant
- Patent Title: Projection display and optical aperture unit
- Patent Title (中): 投影显示和光学孔径单位
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Application No.: US11501197Application Date: 2006-08-09
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Publication No.: US07798653B2Publication Date: 2010-09-21
- Inventor: Shinro Inui , Hiroshi Ooshima , Michiyuki Yoshino
- Applicant: Shinro Inui , Hiroshi Ooshima , Michiyuki Yoshino
- Applicant Address: JP Tokyo
- Assignee: Hitachi Ltd.
- Current Assignee: Hitachi Ltd.
- Current Assignee Address: JP Tokyo
- Agency: McDermott Will & Emery LLP
- Priority: JP2005-230228 20050809
- Main IPC: G03B21/14
- IPC: G03B21/14
Abstract:
A gear portion meshing with the first step of a pinion gear at the side of a motor, which is a driving unit of optical aperture mechanism, is designed to be a two-gears composition of a gear portion abutting on one side surface of the channel of the pinion gear, and a gear portion abutting on the other side surface of the channel of the pinion gear.
Public/Granted literature
- US20090174869A1 Projection display and optical aperture unit Public/Granted day:2009-07-09
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