Method and apparatus for controlling a disc seek operation...

Details Method and apparatus for controlling a disc seek operation... Method and apparatus for controlling a disc seek operation...

2005-04-18

2010-10-26

Nguyen, Hoa T (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044270, C369S053120, C369S030120

Reexamination Certificate

active

07821886

ABSTRACT:
An optical disc device includes an optical pickup for irradiating optical discs with laser and detecting light reflected by the disc to generate received light signals, optical pickup driving means for driving the pickup radially, traverse signal generation means for generating traverse signals forming a pulse at the pickup's crossing a track by binarizing the received light signal based on binary threshold, movement control means for recognizing moving amount and speed of the pickup based on the traverse signal and controlling the optical pickup driving means based on the recognition result for the pickup's seeking to the target, and abnormality monitoring means for sending abnormality notices to the movement control means when pulse interval of the traverse signal exceeds the threshold, the movement control means, after temporarily stopping seek according to the abnormality notice, recognizes the temporary stop position for the optical pickup's seeking from the position to the target.

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