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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 10268113 B1

PDFFull Text
Date of Patent:
Apr. 23, 2019

Filed:

Jan. 16, 2018

Illumination device and projector having light shaping optical system including free-form surface

Applicant:

Seiko Epson Corporation, Tokyo, JP;

Inventors:

Katsuyuki Uehara, Azumino, JP;

Koichi Akiyama, Matsumoto, JP;

Assignee:

SEIKO EPSON CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Sultan Chowdhury

Assistant Examiner:

Magda Cruz

Int. Cl.
CPC ...
G03B 21/20 (2006.01); F21K 9/64 (2016.01); F21V 13/02 (2006.01); G02B 27/09 (2006.01);
U.S. Cl.
CPC ...
G03B 21/208 (2013.01); F21K 9/64 (2016.08); F21V 13/02 (2013.01); G02B 27/0927 (2013.01); G02B 27/0961 (2013.01); G03B 21/204 (2013.01);
Abstract

An illumination device is provided with a light source device including a first light-emitting element that emits a first pencil of rays, and a light shaping optical system including a first lens surface on which the first pencil of rays is incident. The first lens surface has a first free-form surface represented by Expression (1) in which x and y are used as variables. In Expression (1), in a case where h is set to a positive integer, the coefficient Cof the xterm is different from the coefficient Cof the yterm.

Find Patent Forward Citations

Uehara, Katsuyuki. (2019). Illumination device and projector having light shaping optical system including free-form surface (U.S. Patent No. 10268113). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10268113

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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