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:
Sep. 15, 2015
Filed:
Sep. 05, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Hidetoshi Hayashi, Fujisawa, JP;
Tatsuhiko Yamazaki, Zama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A focus detection apparatus for performing phase difference detection type focus detection includes sensor units each configured to generate a signal used for detecting a phase difference, a setting unit configured to set one or more sensor units as determination targets, a determination unit configured to sequentially select a sensor unit from the determination targets, and repeatedly determine whether a signal generated by the selected sensor unit satisfies a termination condition of having a peak value greater than a threshold, and a detection unit configured to perform focus detection using the signal that satisfies the termination condition. The apparatus operates in a first mode and then shift to a second mode. The setting unit includes, in the determination targets in the second mode, a sensor unit that is not included in the determination targets in the first mode.