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:
Feb. 07, 2012
Filed:
May. 29, 2007
Applicant:
Jun Ogawa, Tokyo, JP;
Inventor:
Jun Ogawa, Tokyo, JP;
Assignee:
NEC Display Solutions, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention provides an illumination optical system that guides light emitted from light source deviceto DMD, the illumination optical system including: light tunnelthat uniformizes luminance distribution of light emitted from light source device; relay optical systemthat guides light having uniformized illumination distribution to DMD; and shield boarddisposed on an optical path between light tunneland relay optical system. Shield boardis smaller than outlet end faceof light tunneland at the same time has an opening of a shape similar to the image formation area on DMD, and is movable in a plane containing the opening.