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. 03, 1996
Filed:
Jan. 21, 1993
Nobuhiro Aisawa, Saitama-ken, JP;
Canon Denshi Kabushiki Kaisha, Saitama-ken, JP;
Abstract
In a method for driving a head-seek stepping motor of a disk drive device of the kind performing a head seek to move a recording or reproducing head in a radial direction of a disk-shape recording medium by driving the stepping motor according to pulses of a step signal, a period of time for exciting the stepping motor at one time in response to each pulse of the step signal is set at a length of time which is shorter than a pulse interval of the step signal and which is a minimum length of time necessary for the head seek when the pulses of the step signal are continuously inputted for a continuous head seek, and a re-exciting action is performed on the stepping motor in its last excited phase for a given period of time at the end of the continuous head seek.