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. 03, 1989
Filed:
Oct. 08, 1987
Kouichi Ueda, Kanagawa, JP;
Akihiro Fujiwara, Kanagawa, JP;
Hirofumi Suda, Kanagawa, JP;
Masamichi Toyama, Kanagawa, JP;
Kunihiko Yamada, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A focus detecting device for determining a focused state of a photo taking optical system through a video signal obtained from an image sensor comprises a detecting circuit arranged to detect focused degrees obtained by scanning at a plurality of scanning line parts of an image sensing plane; a correlation determining circuit arranged to determine a correlation between positions on scanning lines at which the focused degrees are detected during the processes of the scanning lines; and a computing circuit arranged to determine a focused state by computing the focused degrees detected from the scanning line parts which are determined to be correlated to each other by the correlation determining circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile