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:
Jun. 10, 2003
Filed:
Sep. 23, 1997
Applicant:
Inventors:
Terutake Kadohara, Yokohama, JP;
Keiji Ohtaka, Yokohama, JP;
Yasuo Suda, Yokohama, JP;
Keiji Nagata, Yokohama, JP;
Kenichiro Yamashita, Matsudo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/232 ;
U.S. Cl.
CPC ...
H04N 5/232 ;
Abstract
A focus state detection apparatus for detecting focus state on the basis of signals outputted from a pair of area sensors each of which is configured in two dimension in accordance with an image of an object passing through an optical system and formed on the pair of area sensors. Each of the pair of area sensors is divided into a plurality of areas each of which can be controlled independently, and charging pixels of the area sensors is controlled by each pair of corresponding divided areas of the area sensors.