Optical disc apparatus

Details Optical disc apparatus Optical disc apparatus

2011-05-10

2011-05-10

Giesy, Adam R (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044250, C369S053300, C369S053280

Reexamination Certificate

active

07940611

ABSTRACT:
An optical disc apparatus comprises an overcurrent detector and when the overcurrent detector detects an overcurrent during a recording operation or a reproduction operation and during an operation for controlling a focus of an objective lens, a rotation speed of an optical disc is reduced and an actuator is controlled to cause the objective lens to be in a retracted state under the condition that a disc motor exerts brake force. The objective lens is in the retracted state until the rotation speed of the optical disc becomes equal to or smaller than a predetermined value and when the rotation speed of the optical disc is equal to or smaller than the predetermined value, the objective lens is released from the retracted state.

REFERENCES:
patent: 2007/0040093 (2007-02-01), Yoshikawa et al.
patent: 2008/0235715 (2008-09-01), Washiya et al.
patent: 07-129978 (1995-05-01), None
patent: 09-305981 (1997-11-01), None
patent: 2006-079783 (2006-03-01), None

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