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. 19, 2009
Filed:
Apr. 12, 2006
Hidekazu Suto, Tokyo, JP;
Yujiro Ito, Kanagawa, JP;
Shinji Takemoto, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An autofocus device comprising a lens-driving unit, a focal-point-position-detecting unit that detects a position of a focal point of the lens, a distance measurement sensor that measures a distance to a subject, and a focus-evaluation-value-calculating unit that calculates a focus evaluation value using a frequency component of an image signal in a particular region in an imaging frame. The device also has a user interface and a control unit that controls the lens-driving unit to drive the lens based on the focus evaluation value or the focus evaluation value, the position of a focal point of the lens, and a measured distance result measured by the distance measurement sensor, thereby meeting the position of the focal point to an in-focus position. The control unit controls the lens-driving unit, the distance measurement sensor and the focus-evaluation-value-calculating unit based on the autofocus contents set by the user interface.