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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 9360679 B1

PDFFull Text
Date of Patent:
Jun. 07, 2016

Filed:

Apr. 20, 2015

Illumination device, projection type image display device, and optical device

Applicant:

Dai Nippon Printing Co., Ltd., Tokyo, JP;

Inventors:

Yukio Taniguchi, Tokyo, JP;

Makio Kurashige, Tokyo, JP;

Yasuyuki Ooyagi, Tokyo, JP;

Assignee:

DAI NIPPON PRINTING CO., LTD., Tokyo, JP;

Attorney:

Kratz, Quintos & Hanson, LLP

Primary Examiner:

William C Dowling

Int. Cl.
CPC ...
G03B 21/14 (2006.01); H04N 9/14 (2006.01); G02B 27/48 (2006.01); G02B 26/10 (2006.01); G03B 21/20 (2006.01); H04N 9/31 (2006.01); G02B 26/08 (2006.01); H04N 5/74 (2006.01); G02B 26/12 (2006.01);
U.S. Cl.
CPC ...
G02B 27/48 (2013.01); G02B 26/0808 (2013.01); G02B 26/0816 (2013.01); G02B 26/10 (2013.01); G02B 26/105 (2013.01); G02B 26/106 (2013.01); G02B 26/12 (2013.01); G03B 21/208 (2013.01); G03B 21/2033 (2013.01); G03B 21/2066 (2013.01); H04N 5/74 (2013.01); H04N 9/14 (2013.01); H04N 9/3129 (2013.01); H04N 9/3155 (2013.01); H04N 9/3161 (2013.01);
Abstract

To provide an illumination device and a projection type image display device that illuminate an area to be illuminated (image formation area) under conditions where speckle noise is less noticeable. An illumination device according to the present invention includes: a light sourcethat emits coherent light; an optical scanning sectionthat scans the coherent light emitted from the light source; and an optical path conversion systemconfigured to allow the coherent light scanned by the optical scanning sectionto illuminate an area to be illuminated sequentially in an overlapping manner. An incident angle of the coherent light that enters respective points of the area to be illuminated changes with time.

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