US 6,982,936 B2
Method of compensating for seek errors of pickup assembly
II-Kweon Joung, Ansan-si (Korea, Republic of)
Assigned to Samsung Electro-Mechanics Co., Ltd., Kyunggi-Do (Korea, Republic of)
Filed on Sep. 12, 2002, as Appl. No. 10/241,664.
Claims priority of application No. 2002-23093 (KR), filed on Apr. 26, 2002.
Prior Publication US 2003/0202432 A1, Oct. 30, 2003
Int. Cl. G11B 7/00 (2006.01)
U.S. Cl. 369—30.22 5 Claims
OG exemplary drawing
 
1. A method of compensating for the seek errors of a pickup assembly, comprising the steps of:
calculating a target track number using the number of frames of a track, a linear velocity, a track pitch, a radius of a track and the like to read data stored in an optical disc by transferring a pickup assembly across the optical disc;
determining whether a seek error has to be compensated for in a radially outward direction of the optical disc;
if the seek error has to be compensated for in a radially inward direction, compensating for the seek error;
transferring the pickup assembly in the radially inward direction, reading an address of a current position of the pickup assembly, and determining whether the current position of the pickup assembly coincides with a target position;
if the current position of the pickup assembly coincides with the target position, calculating the seek error in a radially inward direction and calculating an error compensation value in a radially inward direction; and
storing the calculated error compensation value and using it as transfer data to perform a next seek operation of transferring the pickup assembly.