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:
Apr. 20, 2021
Filed:
Apr. 10, 2019
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Keisuke Kobayashi, Utsunomiya, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01); H04N 9/31 (2006.01); G03B 21/20 (2006.01); G06F 9/30 (2018.01);
U.S. Cl.
CPC ...
G03B 21/147 (2013.01); G03B 21/142 (2013.01); G03B 21/206 (2013.01); G06F 9/3004 (2013.01); H04N 9/3152 (2013.01);
Abstract
An image projection apparatus configured to project a projection image on a projected surface via a projection optical system that includes a first optical system capable of adjusting a curvature amount of an image plane and is interchangeably attached to the image projection apparatus includes an acquirer configured to acquire information on a reference position of the first optical system, and a controller configured to move the first optical system to the reference position when detecting an interchange of the projection optical system or when accepting an instruction from a user.