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:
Apr. 22, 2014
Filed:
Nov. 30, 2011
Kengo Takeuchi, Kawasaki, JP;
Kengo Takeuchi, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An external AF focus detecting apparatus capable of achieving both good focus detection accuracy for a subject in a short distance and an appropriate amount of processing for a subject in a long distance is provided. In the case where the distance to the subject is less than a predetermined threshold value, with respect to accumulation pixels SA5 to SA25 selected in one of a pair of line sensors, pixels are selected in the other line sensor so as to include more pixels in the direction of shift of an optical image of a field of view, namely, pixels SB5 to SB29 are selected as accumulation pixels. Alternatively, pixels included in a range obtained by shifting by a predetermined number of pixels from the range of the accumulation pixels that have been selected in the one line sensor are selected as the accumulation pixels in the other line sensor.