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:
Jul. 27, 2021
Filed:
Nov. 01, 2019
Applicant:
Sz Dji Technology Co., Ltd., Shenzhen, CN;
Inventors:
Assignee:
SZ DJI TECHNOLOGY CO., LTD., Shenzhen, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 11/10 (2006.01); G03B 9/06 (2021.01); F21V 14/08 (2006.01); F21S 41/695 (2018.01); B64C 39/02 (2006.01); F21W 107/30 (2018.01);
U.S. Cl.
CPC ...
F21V 14/08 (2013.01); B64C 39/024 (2013.01); F21S 41/695 (2018.01); F21V 11/10 (2013.01); G03B 9/06 (2013.01);
Abstract
A light amount adjustment device includes a base member, a rotation member rotatably held with respect to the base member, and a light amount adjustment member engaged with the rotation member and configured to be driven by the rotation member to adjust an amount of passing light. The rotation member includes a first surface area in contact with the base member and a second surface area not in contact with the base member. A surface roughness of the first surface area is greater than a surface roughness of the second surface area.