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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.:

US 10082731 B1

PDFFull Text
Date of Patent:
Sep. 25, 2018

Filed:

Apr. 13, 2017

Illumination apparatus and projection display apparatus using the same

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventor:

Takehito Kawasumi, Saitama, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Canon USA, Inc. I.P. Division

Primary Examiner:

Sultan Chowdhury

Assistant Examiner:

Magda Cruz

Int. Cl.
CPC ...
G03B 21/20 (2006.01); G03B 33/12 (2006.01); F21V 9/30 (2018.01); F21V 7/00 (2006.01); F21V 7/06 (2006.01); F21V 9/16 (2006.01); G02B 27/12 (2006.01); G02B 27/14 (2006.01); G02B 27/28 (2006.01); G03B 21/00 (2006.01); H04N 9/31 (2006.01);
U.S. Cl.
CPC ...
G03B 33/12 (2013.01); F21V 7/0083 (2013.01); F21V 7/06 (2013.01); F21V 9/16 (2013.01); F21V 9/30 (2018.02); G02B 27/126 (2013.01); G02B 27/141 (2013.01); G02B 27/283 (2013.01); G03B 21/005 (2013.01); G03B 21/006 (2013.01); G03B 21/008 (2013.01); G03B 21/204 (2013.01); G03B 21/208 (2013.01); G03B 21/2013 (2013.01); G03B 21/2066 (2013.01); H04N 9/3152 (2013.01); H04N 9/3161 (2013.01); H04N 9/3164 (2013.01);
Abstract

An illumination apparatus includes an illumination optical system configured to illuminate a light modulation element; a plurality of light source units each including a fluorescent member, at least one light source, and a light-guiding optical system; and an optical-path combining system. A predetermined region in an area where light source images are formed by the illumination optical system using light beams from the optical-path combining system is defined as an effective region, and the number of the light source units is denoted by N. In this case, the light source images and N subregions obtained by dividing the effective region by N along a first side direction of the effective region or a second side direction orthogonal to the first side direction satisfy a predetermined relation.

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