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:
Nov. 01, 2022
Filed:
Oct. 28, 2019
Applicant:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Inventors:
Assignee:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/13357 (2006.01); G02F 1/1335 (2006.01); F21V 8/00 (2006.01); G02F 1/13 (2006.01);
U.S. Cl.
CPC ...
G02F 1/133607 (2021.01); G02B 6/0051 (2013.01); G02B 6/0061 (2013.01); G02F 1/133603 (2013.01); G02F 1/1326 (2013.01);
Abstract
Light having high directivity and high uniformity is emitted. A light source apparatus () according to the present invention includes: a light emitting body group () in which a plurality of light sources () that emit directional light are arranged on one surface; and a first visual field limiting film () that is provided on an optical path of the light emitted from the plurality of light sources (), and outputs light that enters the first visual field limiting film in a first predetermined angular range by homogeneously diffusing the light within the first predetermined angular range.