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. 30, 1996
Filed:
Jan. 11, 1995
Reiko Torii, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An auto-focusing apparatus which obtains an evaluation value from a contrast component of a video signal and performs focus adjustment so that the evaluation value will be maximum, comprises: measurement frame setting means for setting a first frame and a second frame on the screen to obtain the evaluation value; and evaluation value generating means for obtaining a first evaluation value and a second evaluation value from the first frame and the second frame. Focus adjustment is performed by selecting the first frame or the second frame according to changes of the first evaluation value and the second evaluation value when a focus lens is moved in a very small amount.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile