Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1997-01-29
1998-09-15
Hindi, Nabil
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369112, G11B 700
Patent
active
058089934
ABSTRACT:
An automatic disk discriminating method and an apparatus therefor are disclosed for use in an optical disk system. A triangular wave signal generator generates a triangular wave signal for searching for a focus point by moving a objective lens in relation to the optical disk. A window signal generator generates a window signal by comparing the triangular wave signal with a predetermined level. A disk discriminator discriminates the disk type of the optical disk by comparing the signal obtained when light from the objective lens is focused on a recording surface on the optical disk, with the window signal. Accordingly, the disk type of the optical disk is automatically discriminated during focus controlling using the distance between the disk recording surface and the objective lens of the optical pick-up.
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Patents Act 1977: Combined Searcg and Examination Report under Sections 17 and 18(3).
Hindi Nabil
Samsung Electronics Co,. Ltd.
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