Optical disc player having a disk offset detection and protectio

Details Optical disc player having a disk offset detection and protectio Optical disc player having a disk offset detection and protectio

1991-11-04

1995-01-24

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4432, 369 50, G11B 700

Patent

active

053847610

ABSTRACT:
An optical disk player is provided which includes a disk driving unit for driving an optical disk, a traverse count circuit for counting the number of recording tracks on the optical disk traversed by an optical pickup, an angle detection circuit for detecting the rotational angle through which the optical disk is rotated, and a stop control unit supplied with a count output from the traverse counting unit and a detection output from the angle detection unit. The stop control unit checks to see if the count value by the traverse count unit during rotation by a predetermined angle of the optical disk by the disk driving unit reaches a predetermined number of tracks corresponding to an allowable offset. The stop control unit halts the driving of the optical disk if the count value reaches the aforementioned predetermined number of tracks.

REFERENCES:
patent: 4550347 (1985-10-01), Nakamuta
patent: 4672595 (1987-06-01), Senso
patent: 4809248 (1989-02-01), Sengoku
patent: 4815063 (1989-04-01), Aoshima et al.
patent: 4881215 (1989-11-01), Horie
patent: 4908561 (1990-03-01), Hashimoto
patent: 4955008 (1990-09-01), Collomby et al.
patent: 4959733 (1990-09-01), Miura et al.

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