Patent ID: 6606283
Filing Date: 2003-08-12
Classification: G11B

Abstract:
A long seeking method used in an optical disk drive, the optical disk drive comprising:a sled; a pick-up head on the sled for accessing data stored in a plurality of tracks of an optical disk; and a controller for applying a velocity control force to the sled so as to move the pick-up head from an initial track of a seeking region of the optical disk to a target track of the seeking region according to a velocity profile, the seeking region comprising an acceleration region and a deceleration region, wherein the velocity profile in the acceleration region increases according to a moving direction of the pick-up head and the velocity profile in the deceleration region decreases; the long seeking method comprising: identifying a position of the pick-up head within the seeking region; applying a first driving force on the sled in addition to the velocity control force when the pick-up head is within the acceleration region, wherein a direction of the first driving force is the same as the moving direction of the pick-up head; and applying a second driving force on the sled in addition to the velocity control force when the pick-up head is within the deceleration region, wherein a direction of the second driving force is opposite to the moving direction of the pick-up head.