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:
Nov. 27, 1990
Filed:
May. 17, 1989
Hisanobu Kawamura, Tokyo, JP;
Yoshiaki Nakayama, Tokyo, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
An automatic focusing device for a camera includes a camera section in which an optical lens system having a variable focusing position and a driver for varying the focus of the lens system are built-in. A desired scene is picked up through the lens systems and converted into a video signal by raster scanning. A signal extracting section defines a plurality of sampling points which are arranged in a direction which intersects the scanning lines of the video signal. The signal extracting section receives the video signal and, when the raster scanning reaches any one of the sampling points, extracts and holds the video signal. A computing section is responsive to the held signal for determining a direction in which the focus of the lens system is to be varied. A control section controls the driver on the basis of the determined direction to vary the focus of the lens system in that direction.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile