Invention Grant
- Patent Title: Projection unit and projection type image display apparatus
- Patent Title (中): 投影单元和投影型图像显示装置
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Application No.: US11823244Application Date: 2007-06-27
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Publication No.: US07798655B2Publication Date: 2010-09-21
- Inventor: Atsushi Matsuura , Shinichi Suzuki
- Applicant: Atsushi Matsuura , Shinichi Suzuki
- Applicant Address: JP Hachioji-shi
- Assignee: Konica Minolta Opto, Inc.
- Current Assignee: Konica Minolta Opto, Inc.
- Current Assignee Address: JP Hachioji-shi
- Agency: Sidley Austin LLP
- Priority: JP2006-180718 20060630; JP2006-241538 20060906; JP2006-350055 20061226
- Main IPC: G03B21/28
- IPC: G03B21/28
Abstract:
A projection unit 17 effectively corrects out of focus due to a temperature rise. A mirror holding mechanism of a concave mirror 25 has a mirror holder 41 and a mirror holder base 42. The concave mirror 25 is slidably housed in the mirror holder 41. A focus correction member 57, which expands by heat, is disposed between a back face of the concave mirror 25 and reference plane S formed in the mirror holder. The concave mirror 25 and the focus correction element 57 are urged to the reference plane S by a mirror retainer spring 59.
Public/Granted literature
- US20080013055A1 Projection unit and projection type image display apparatus Public/Granted day:2008-01-17
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