Optical disk drive capable of higher-speed seeking

Details Optical disk drive capable of higher-speed seeking Optical disk drive capable of higher-speed seeking

1995-12-13

1997-04-22

Edun, Muhammad N.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, 360 7805, 360 7806, G11B 708

Patent

active

056234619

ABSTRACT:
An optical disk drive has a rough actuator for moving an optical head with respect to an optical disk and a fine actuator for moving an object lens with respect to the optical head, to transfer an optical spot from a present address to a target address. The optical disk drive controls the radial speed of an optical spot based on a trapezoidal speed profile. A deceleration period is effected when the remaining track number is at a threshold value. During the deceleration period when a rough actuator moves the optical head, fine actuator is moved in the direction opposite to the moving direction of the optical head to generate a stationary state of the optical spot. An address detector is activated during the stationary state to read the present address, thereby correcting the remaining track number. When the rough actuator is stopped, the seeking operation is completed without an additional fine seeking operation.

REFERENCES:
patent: 5268883 (1993-12-01), Yamaguchi et al.
patent: 5319623 (1994-06-01), Yamada et al.

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