Pickup drive controller for optical disc drive

Details Pickup drive controller for optical disc drive Pickup drive controller for optical disc drive

2005-09-20

2005-09-20

Huber, Paul W. (Department: 2653)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044320, C369S053120, C369S053290

Reexamination Certificate

active

06947358

ABSTRACT:
In an optical disk drive, in order to cancel a lens offset which may occur when performing a seek followed by a read, a seek position must be set several sectors before a target position for the read, resulting in a delay in access time. A lens offset amount is measured when a seek followed by read is started, and how many sectors before a read target position a seek position must be set is determined on the basis of two parameters, namely, the lens offset amount and a number of seek tracks. Thereby, an optimum seek position at which the lens offset is canceled can be set with no waste, resulting in an improvement in access time.

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