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:
Jan. 10, 2023
Filed:
Nov. 29, 2019
Applicant:
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Inventors:
Shumpei Nishio, Tokyo, JP;
Kaori Nakatsugawa, Tokyo, JP;
Makio Kurashige, Tokyo, JP;
Kazutoshi Ishida, Tokyo, JP;
Assignee:
DAI NIPPON PRINTING CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21L 4/00 (2006.01); F21V 14/06 (2006.01); F21Y 115/30 (2016.01);
U.S. Cl.
CPC ...
F21V 14/065 (2013.01); F21L 4/00 (2013.01); F21Y 2115/30 (2016.08);
Abstract
A portable lighting device includes: a coherent light source; a shaping optical system that shapes coherent light emitted from the coherent light source; and a diffractive optical element that diffracts the coherent light shaped by the shaping optical system to a surface to be irradiated (IP). The diffractive optical element is rotatably supported. The surface to be irradiated is lighted in a pattern depending on a diffraction pattern of the diffractive optical element.