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:
Dec. 11, 1990
Filed:
May. 03, 1989
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358227 ; 2502014 ; 354403 ;
Abstract
Disclosed is an autofocus device, particularly an autofocus device in which focus detection is effected repeatedly. A determination is made as to whether or not a determination of the in-focus state is made continuously for a predetermined duration upon repeated detection of focus after an initial in-focus determination is made. While the determinations of the in-focus state are being made for the predetermined duration after the initial determination on the in-focus state is made, the terminals of the motor are short-circuited to apply brakes to it, and after the aforementioned duration, the motor terminals are opened, thereby stopping the motor.