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:
Oct. 30, 2007
Filed:
Mar. 15, 2005
Applicant:
Tun-hsing Liu, Pingjhen, TW;
Inventor:
Tun-Hsing Liu, Pingjhen, TW;
Assignee:
Mediatek Inc., , TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for determining the position of a pick-up head involves retrieving the respective parameter values relating to the linear velocity and angular velocity of the pick-up head at a certain place on the optical disk, and then calculating the ratio of the parameter value of the linear velocity to the parameter value of the angular velocity. Since the ratio is linearly correlated with the distance between the pick-up head and the center of the optical disk, the absolute position of the pick-up head can be determined, as far as its whereabouts is concerned.