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:
Apr. 09, 2019
Filed:
Mar. 20, 2014
Applicant:
Nec Display Solutions, Ltd., Tokyo, JP;
Inventor:
Shinichiro Chikahisa, Tokyo, JP;
Assignee:
NEC DISPLAY SOLUTIONS, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/22 (2018.01); H04N 9/31 (2006.01); G03B 21/20 (2006.01); G02B 5/30 (2006.01); G03B 21/00 (2006.01); G02B 5/04 (2006.01);
U.S. Cl.
CPC ...
H04N 9/3167 (2013.01); G02B 5/3025 (2013.01); G02B 5/3083 (2013.01); G03B 21/008 (2013.01); G03B 21/204 (2013.01); G03B 21/208 (2013.01); G03B 21/2013 (2013.01); G03B 21/2073 (2013.01); H04N 9/3105 (2013.01); H04N 9/3161 (2013.01); G02B 5/04 (2013.01);
Abstract
A projection display apparatus that can prevent deviation in the light quantity distribution of the projected image is provided. A projection display apparatus includes: a light source unit including a light emitting element; an image light generator modulating light from the light source unit to emit image light; a projecting unit projecting the image light; a polarization modulator on which the image light is made incident and that emits light in a particular polarization state; and a depolarizer arranged on the optical path between the light emitting element and the polarization modulator.