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:
Sep. 17, 2013
Filed:
Aug. 28, 2012
Tsung-yu LU, Hsinchu, TW;
Yen-chun Lin, Hsinchu, TW;
Hung-lung Tseng, Hsinchu, TW;
Tun-chieh Lee, Hsinchu, TW;
Tsung-Yu Lu, Hsinchu, TW;
Yen-Chun Lin, Hsinchu, TW;
Hung-Lung Tseng, Hsinchu, TW;
Tun-Chieh Lee, Hsinchu, TW;
Philips & Lite-On Digital Solutions Corporation, Taipei, TW;
Abstract
A position control method of an optical pickup head of an optical disc drive is provided. The optical disc drive has an optical pickup head for reading data from an optical disc and a step index for controlling the movement of the optical pickup head. The position control method includes: calculating a first position information of the optical pickup head according to the step index; reading an address information from the optical disc, calculating a second position information of the optical pickup head according to the address information; determining whether a difference between the first position information and the second position information is greater than a predetermined value; updating the step index when the difference is not greater than the predetermined value; moving the optical pickup head to an initial position when the difference is greater than the predetermined value, and setting the step index as zero.