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. 01, 2008
Filed:
Jan. 12, 2006
Kun-chang Chang, Hsinchu, TW;
Kun-Chang Chang, Hsinchu, TW;
Lite-On It Corporation, Taipei, TW;
Abstract
A method is disclosed for adjusting the rotational speed of a disk drive. According to the method, the proportion of time which the disc drive is reading data from the disc during a unit time T is calculated. Then, the increase of the rotational speed of the motor is avoided if the error rate Ek that a disc drive reads data during each of r consecutive units of time periods T is not less than a criterion Q. Otherwise, the rotational speed of the motor of the disc drive is increased if the proportion of time Pk that the disc drive spends reading data from the disc is greater than a threshold H during each of m consecutive units of time period T, and the rotational speed of the motor of the disc drive is decreased if the Pk is less than a threshold L during each of n consecutive units of time periods T.