Optical disk drive control circuit

Details Optical disk drive control circuit Optical disk drive control circuit

2011-01-25

2011-01-25

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

C369S053230, C369S047140, C369S044320

Reexamination Certificate

active

07876654

ABSTRACT:
An IC provided in an optical disk device having an objective lens and a pickup for a disk. The IC has a circuit for holding a signal which drives the objective lens in a focus or tracking direction and for detecting the moving direction of the objective lens, and a circuit for generating a signal which applies an acceleration to the objective lens. When the objective lens passes through a defect on the disk, on the basis of the detected moving direction of the objective lens, the IC applies the acceleration alternately in plus and minus directions to the objective lens to make the objective lens stationary. As a result, after the defect passage, the objective lens can be quickly returned to a focused point or an on-track position and reproducing/recording operation can be resumed.

REFERENCES:
patent: 5623465 (1997-04-01), Sasaki et al.
patent: 5682307 (1997-10-01), Sasaki et al.
patent: 6341113 (2002-01-01), Kamiyama
patent: 2000-090467 (2000-03-01), None
patent: 2003-168227 (2003-06-01), None
patent: 2003-281747 (2003-10-01), None
patent: 2005-056511 (2005-03-01), None
Japanese Office Action dated Feb. 23, 2010; Application No. JP2006-290154.

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