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:
Oct. 17, 2017
Filed:
Oct. 29, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A focus adjustment apparatus includes an imaging unit, a first detection unit, a second detection unit, and a control unit. The imaging unit receives and photoelectrically converts a light flux passed through a photographing optical system including a focus lens. The first detection unit detects a phase difference between a pair of image signals output from the imaging unit. The second detection unit detects contrast information from a signal output from the imaging unit. The control unit controls driving of the focus lens based on a detection result of at least one of the first detection unit and the second detection unit. If the detection result of the first detection unit satisfies a first condition, the control unit controls driving of the focus lens by using the detection result of the first detection unit, and changes the first condition according to the contrast information detected by the second detection unit.