Method and device for controlling beginning point of optical...

Details Method and device for controlling beginning point of optical... Method and device for controlling beginning point of optical...

2003-10-15

2008-07-08

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053280, C369S053240

Reexamination Certificate

active

07397746

ABSTRACT:
A method and device are provided for controlling a beginning point of an optical pick-up unit. The optical pick-up unit moves to a beginning point of an optical disc such as a DVD (Digital Versatile Disc) to execute a servo-tuning function at the beginning point. The method includes a) performing a focus search operation on an optical disc and at the same time determining whether there is a reflection signal from the optical disc; b) after performing the focus search operation, moving the optical pick-up unit toward a predetermined beginning point of the optical disc based on the result of the determining step; and c) based on the reflection signal from the optical disc, determining whether or not the optical pick-up unit has moved to the beginning point of the optical disc while the optical pick-up unit is in motion.

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