Invention Grant
US08690357B2 Projector having a light transmitting window movably disposed in-front of the zoom lens and a control method for the same
有权
具有可移动地设置在变焦透镜的前方的透光窗的投影仪及其控制方法
- Patent Title: Projector having a light transmitting window movably disposed in-front of the zoom lens and a control method for the same
- Patent Title (中): 具有可移动地设置在变焦透镜的前方的透光窗的投影仪及其控制方法
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Application No.: US12998467Application Date: 2008-10-31
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Publication No.: US08690357B2Publication Date: 2014-04-08
- Inventor: Atsushi Katou
- Applicant: Atsushi Katou
- Applicant Address: JP Tokyo
- Assignee: NEC Display Solutions, Ltd.
- Current Assignee: NEC Display Solutions, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: McGinn IP Law Group, PLLC
- International Application: PCT/JP2008/069891 WO 20081031
- International Announcement: WO2010/050047 WO 20100506
- Main IPC: G03B21/14
- IPC: G03B21/14
Abstract:
A safe, highly bright projector is to be implemented. A projector directs a light beam from a light source (101) to an image modulating device (105), and magnifies and projects an image formed at the image modulating device (105) through a zoom lens (102). This projector has a light transmitting window (103) movably disposed in front of the surface of the light outgoing side of the zoom lens (102) along the optical axis. The projector further has a window position control unit (108) to control the position of the light transmitting window (103) so as not to change the light beam region that appears on the outer surface of the light transmitting window (103) as the focal length of the zoom lens (102) is varied.
Public/Granted literature
- US20110199587A1 PROJECTOR AND CONTROL METHOD FOR THE SAME Public/Granted day:2011-08-18
Information query
