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:
Jul. 28, 2020
Filed:
Aug. 31, 2016
Applicant:
Nec Display Solutions, Ltd., Tokyo, JP;
Inventor:
Shigeo Hamamura, Tokyo, JP;
Assignee:
NEC DISPLAY SOLUTIONS, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/20 (2006.01); G02B 26/00 (2006.01); G02B 27/14 (2006.01); H04N 9/31 (2006.01); G03B 33/08 (2006.01);
U.S. Cl.
CPC ...
G03B 21/2033 (2013.01); G02B 26/008 (2013.01); G02B 27/141 (2013.01); G03B 21/204 (2013.01); G03B 21/206 (2013.01); G03B 21/2013 (2013.01); G03B 33/08 (2013.01); H04N 9/3158 (2013.01); H04N 9/3164 (2013.01); H04N 9/3194 (2013.01);
Abstract
A projector has: a plurality of light sources, a plurality of phosphor wheels to which are affixed a plurality of arc-shaped segments of phosphor that takes as excitation light the light from the light sources to emit light, a synthesizing optical system that synthesizes light emitted by the plurality of phosphor wheels, and a phosphor rotation control unit that controls the rotation of the plurality of phosphor wheels such that the timing at which the quantity of light emitted by the phosphor wheels becomes a minimum value differs for each of the plurality of phosphor wheels.