The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 2010
Filed:
Mar. 30, 2006
Atsushi Matsuura, Sakai, JP;
Kohtaro Hayashi, Toyonaka, JP;
Jun Ishihara, Kobe, JP;
Masayuki Imaoka, Izumiotsu, JP;
Atsushi Matsuura, Sakai, JP;
Kohtaro Hayashi, Toyonaka, JP;
Jun Ishihara, Kobe, JP;
Masayuki Imaoka, Izumiotsu, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
An projection type image display apparatus includes a projection optical system having a plurality of concave mirrors and digital micromirror device (DMD). An optical path from the DMD to the concave mirror closest to the DMD is a sealed space which is surrounded by an image forming device holding plate holding the DMD, an optical component holding member holding the concave mirror and the image forming device holding plate, and a cover glass (transparent dust-proof cover) arranged on the optical path from the DMD to the concave mirror closest to the DMD.