Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2007-05-08
2007-05-08
Psitos, Aristotelis M. (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S030130
Reexamination Certificate
active
11249307
ABSTRACT:
The present invention provides an information disc recording/playback apparatus which includes a track cross detection means, a track cross direction detection means, a rotation angle detection means, and a count means, detects the track pitch of a disc, evaluates the vibration amount, vibration speed, or vibration acceleration considering the track pitch of the disc, and determines a maximum rotation speed that is lower than the allowable vibration amplitude, vibration speed, or vibration acceleration of the information disc recording/playback apparatus. The present invention also provides a vibration detection method for the information disc recording/playback apparatus. This information disc recording/playback apparatus can perform vibration detection using a single threshold value that is independent of the type of the disc, without using an acceleration sensor, and further, the apparatus can accurately perform vibration detection even when direction detection is difficult.
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Matsushita Electric - Industrial Co., Ltd.
Psitos Aristotelis M.
Wenderoth , Lind & Ponack, L.L.P.
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