Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takanori Hisada0
Koji Hirata0
Masahiko Yatsu0
Date of Patent
March 1, 2011
0Patent Application Number
120231510
Date Filed
January 31, 2008
0Patent Primary Examiner
Patent abstract
In a projection type display apparatus for enabling to display an image, by projecting an image on an image display element(s), enlargedly, upon a nearly horizontal surface, such as, a table, a reflection mirror for reflecting a light from a light source is so disposed that an optical axis of the light source is nearly perpendicular to an optical axis of a lens group having a plural number of lens elements, which are disposed symmetric with respect to the optical axis.
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