Optical disc device and defect detection method for optical...

Details Optical disc device and defect detection method for optical... Optical disc device and defect detection method for optical...

2011-07-12

2011-07-12

Nguyen, Hoa T (Department: 2627)

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Reexamination Certificate

active

07978578

ABSTRACT:
An optical disc device includes an optical head section and a regularity monitoring circuit. The optical head section generates a wobble signal indicating wobbling of a track formed on a recording surface of an optical disc medium based on a reflected light reflected by the optical disc medium. The regularity monitoring circuit judges an existence or absence of a defect on the optical disc medium based on a difference between the wobble signal and a signal indicating the wobble under a normal condition.

REFERENCES:
patent: 4832487 (1989-05-01), Mikuriya et al.
patent: 5128911 (1992-07-01), Ito et al.
patent: 6683830 (2004-01-01), Eom
patent: 7092334 (2006-08-01), Choi et al.
patent: 7457212 (2008-11-01), Oh
patent: 7697405 (2010-04-01), Mashimo et al.
patent: 7804756 (2010-09-01), Haddad et al.
patent: 2003/0053381 (2003-03-01), Takahashi et al.
patent: 2005/0185549 (2005-08-01), Tsai et al.
patent: 2005/0286353 (2005-12-01), Hanano
patent: 2006/0018229 (2006-01-01), Senba
patent: 2006/0187800 (2006-08-01), Ogura
patent: 2002-230752 (2002-08-01), None
patent: 2004-348800 (2004-12-01), None
patent: 2006-31890 (2006-02-01), None
patent: 01/52249 (2001-07-01), None
Japanese Official Action—2008-503862—Jul. 2, 2010.

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