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:
Mar. 27, 2018
Filed:
Nov. 19, 2015
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Hiroshi Abe, Ichikawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/232 (2006.01); H04N 5/235 (2006.01); H04N 17/00 (2006.01); G03B 13/36 (2006.01);
U.S. Cl.
CPC ...
H04N 5/23212 (2013.01); H04N 5/2356 (2013.01); H04N 5/23209 (2013.01); H04N 5/23216 (2013.01); H04N 17/002 (2013.01); G03B 13/36 (2013.01);
Abstract
A focus detection apparatus comprises: a focus detection unit configured to detect a focus state; an obtaining unit configured to obtain a correction value to be used in correction of the focus state detected by the focus detection unit; and a storage unit configured to store a correction value. In a case where a difference between the correction value stored in the storage unit and the correction value obtained by the obtaining unit is smaller than a threshold value, the correction value stored in the storage unit is not updated.