Drive device and method for controlling the same

Details Drive device and method for controlling the same Drive device and method for controlling the same

2010-10-28

2011-12-13

Bibbins, Latanya (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S044280, C369S044270, C369S044250, C369S053230

Reexamination Certificate

active

08077574

ABSTRACT:
An optical drive includes: an optical pickup; a preprocessing circuit which processes an optical signal detected by the optical pickup; nonvolatile memory having stored therein relation information which represents the relation of a signal balance with respect to a signal difference between a TE signal and an FE signal at the time of a predetermined operation of the optical pickup; and a central processing circuit which performs focus control of the optical pickup. The preprocessing circuit generates the signal balance of the optical pickup. The preprocessing circuit also obtains the FE signal and the TE signal with respect to the optical disc. The central processing circuit derives a phase difference and an amplitude difference from the signal balance and the relation information, and calculates, based on the differences and the TE signal, a FE signal suitable for the predetermined operation.

REFERENCES:
patent: 5850081 (1998-12-01), Yanagisawa
patent: 7839733 (2010-11-01), Nakai
patent: 2009/0028021 (2009-01-01), Yin et al.
patent: 2001-222827 (2001-08-01), None

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