Patent Number: 7,088,647

Title: Apparatus of controlling tracking for a disk

Abstract: An apparatus includes a controller storing information on dense/sparse state of the tracking error signal in connection with characteristic of the signal generated by a phase encoder while tracking servo of a servo unit is inactivated, and, in data reproduction mode, identifying a current disk phase based on characteristic of the signal generated by the phase encoder, and adjusting tracking characteristic of the servo unit based on the stored information in connection with the signal characteristic in order to compensate an effect rate of eccentricity on the identified disk phase. Through minute adjustment of servo characteristic for each disk phase, error range of TE signal to track in real time is reduced. Therefore, tracking for an eccentric disk becomes easier and more reliable.

Inventors: Han; Yong Hee (Junjoo-si, KR), Park; Sung Woo (Daegu-si, KR)

Assignee: LG Electronics Inc.

International Classification: G11B 7/095 (20060101)

Expiration Date: 8/08/02018