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:
May. 27, 2014
Filed:
Jul. 22, 2010
Akira Egawa, Kawasaki, JP;
Akira Egawa, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image pickup apparatus that can efficiently obtain an offset between focal positions detected in phase difference-based focus detection and contrast-based focus detection by using results of phase difference-based focus detection at multiple points. Focal positions in a plurality of regions based on a pair of image signals obtained from different pupils are obtained. A focal position for a focus lens at which a contrast of image signals for image pickup is at a peak is detected. A target focal position is determined from the plurality of focal positions. When another focal position is present between a present focal position and the target focal position, an offset between a focal position of the focus lens at which the contrast detected at the other focal position while the focus lens is moving is at a peak and the other focal position is calculated.