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:
Jul. 13, 1993
Filed:
Dec. 09, 1991
Hiroyoshi Misumi, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A head driving device includes a head driving mechanism which is arranged to shift, relative to a recording track formed on a recording medium, a head stepwise in units of a predetermined driving extent, a detection circuit which detects the level of a signal reproduced by the head, and a control circuit which controls the head driving mechanism to have the head shifted in the direction of obtaining the maximum output of the detection circuit. When the head shifting direction is reversed, the control circuit causes the head to be shifted in the reverse direction at least by two steps in units of the driving extent and determines the stopping position of the head on the basis of the output of the detection circuit obtained at each of head positions obtained at each step of shifting the head in the reverse direction.