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. 30, 2014
Filed:
Apr. 12, 2012
Akihiro Nishio, Yokohama, JP;
Akihiro Nishio, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image-pickup apparatus has an image sensor in which an image-pickup pixel and a focus detecting pixel are arrayed; a focus detection unit which detects a defocus amount of the imaging lens by a phase difference detection method using an output signal from the focus detecting pixel; and acquisition unit which acquires the ray vignetting information of the imaging lens. When the focus lens in the imaging lens is positioned within a position range in which the position of the focus lens cannot be detected, the focus detection unit detects the defocus amount of the imaging lens using the ray vignetting information in a position of the focus lens in which the amount of ray vignetting is the smallest within the position range.