Optical disc device and optical disc determination method

Details Optical disc device and optical disc determination method Optical disc device and optical disc determination method

2011-08-02

2011-08-02

Edun, Muhammad N. (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053280, C369S044250, C369S044280

Reexamination Certificate

active

07990827

ABSTRACT:
An optical disc device includes a control part for causing processing of determining a type of an optical disc to be executed. The processing caused by the control part to be executed for determining the optical disc includes: signal acquisition processing of acquiring a pull-in signal (sum signal of reflected signal) and an RF signal (reproduced signal) by moving an objective lens in either of a direction approaching the optical disc and a direction separating from the optical disc; and determination processing of deciding whether or not to correct the pull-in signal acquired in the signal acquisition processing and determining the type of the optical disc by using either of amplitude of the acquired pull-in signal and a correction value with which the amplitude of the acquired pull-in signal is corrected by using a predetermined value obtained from the acquired RF signal.

REFERENCES:
patent: 2005/0276199 (2005-12-01), Sugai
patent: 04-011325 (1992-01-01), None
patent: 2004-171614 (2004-06-01), None
patent: 2004-206765 (2004-07-01), None
patent: 2005-259252 (2005-09-01), None
patent: 2005-353142 (2005-12-01), None

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