Optical disk apparatus

Details Optical disk apparatus Optical disk apparatus

2011-05-24

2011-05-24

Renner, Craig A. (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044260, C369S044350

Reexamination Certificate

active

07948839

ABSTRACT:
An optical disk apparatus includes: an optical pickup unit for reading out information recorded on an optical disk; a demodulation circuit for demodulating digital data from an output signal of the optical pickup unit; and a controller for performing a servo control based on the output signal of the optical pickup unit. When performing a focus/tracking control in a recess and a protrusion of a guide groove of the optical disk, the controller obtains a focus control gain difference between the recess and the protrusion by comparing focus offsets with respect to variations in amplitudes of signals from the optical disk for the recess and the protrusion, respectively.

REFERENCES:
patent: 5999502 (1999-12-01), Nakata et al.
patent: 6240055 (2001-05-01), Takamine et al.
patent: 6621774 (2003-09-01), Iwanaga
patent: 6643234 (2003-11-01), Iwanaga
patent: 6996044 (2006-02-01), Takeda
patent: 2003/0147330 (2003-08-01), Teraoka et al.
patent: 07-129975 (1995-05-01), None
patent: 08-329484 (1996-12-01), None
patent: 10-091976 (1998-04-01), None

Affiliated with

Also associated with

Rating

Optical disk apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disk apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disk apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2691308