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:
Jul. 03, 2018
Filed:
Mar. 14, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Mineo Uchida, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An imaging element includes pixel portions each having a first sub-pixel and a second sub-pixel and outputs a phase difference detection-type focus detecting signal. An image signal A includes information for the first sub-pixel and an image signal AB includes information for the second sub-pixel. A level determining unit compares the image signal A with a threshold value SHA and compares the image signal AB with a threshold value SHAB. A correlation calculation processing unit performs correlation calculation for a signal excluding the image signal A having a level exceeding the threshold value SHA and the image signal AB having a level exceeding the threshold value SHAB so as to output the result of calculation to a CPU. The CPU calculates a focal shift amount in accordance with the result of calculation and performs a focus adjusting operation by drive-controlling a focus lens.