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:
Jun. 01, 2021
Filed:
Apr. 09, 2019
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 29/67 (2015.01); F21V 5/04 (2006.01); F21V 13/02 (2006.01); F21V 14/02 (2006.01); F21V 29/504 (2015.01); F21V 29/506 (2015.01); F21V 29/503 (2015.01); F21V 23/02 (2006.01); F21Y 115/10 (2016.01); F21V 23/00 (2015.01);
U.S. Cl.
CPC ...
F21V 29/67 (2015.01); F21V 5/045 (2013.01); F21V 13/02 (2013.01); F21V 14/02 (2013.01); F21V 29/503 (2015.01); F21V 29/504 (2015.01); F21V 29/506 (2015.01); F21V 23/003 (2013.01); F21V 23/02 (2013.01); F21Y 2115/10 (2016.08);
Abstract
A lighting device that protects a member related to light emission from heat associated with light emission includes a light source, a first optical member configured to transmit light emitted by the light source, a second optical member, arranged between the light source and the first optical member, configured to transmit light emitted by the light source, and an air-sending mechanism configured to send air suctioned from a first space that is an inner space on a side nearer to the light source than the second optical member and includes the light source to a second space that is a space between the first optical member and the second optical member.