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. 23, 2002
Filed:
Dec. 23, 1999
Minoru Hirashima, Kadoma, JP;
Funai Electric Co., Ltd., Osaka, JP;
Abstract
In a disk drive device, a CPU of a CD-R drive starts acceleration from low rotational driving towards a target rotational speed in a condition in which a tracking servo is in an OFF condition and simultaneously starts counting a number of tracking errors prior to performing recording or reproduction. Upon comparison of the number of counts and a specified threshold for determining vibration, in case the number of counts has exceeded the threshold, the tracking servo are turned ON for performing recording or reproduction at a rotational speed that is lower than the target rotational speed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile