Disk roulette control method and apparatus for use in an optical

Details Disk roulette control method and apparatus for use in an optical Disk roulette control method and apparatus for use in an optical

1997-12-18

1999-04-06

Dinh, Tan

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 37, G11B 1722

Patent

active

058927379

ABSTRACT:
A disk roulette controller effectively controls the rotation of a tray roulette employing an electrode contact technique for use in a disk changer. When a user's instruction to search a target dish is received, a drive signal is supplied to a motor, thereby revolving the tray roulette in a predetermined direction. Next, a pulse width modulation (PWM) and a one-shot pulse signal are generated in response to a pulse signal indicating whether or not a scanner electrode contacts an end electrode of the target dish. In response to the PWM signal, the rotation speed of the revolving tray roulette is reduced and, thereafter, in response to the one-shot pulse signal, the tray roulette is stopped at a pickup position.

REFERENCES:
patent: 5193079 (1993-03-01), Ko et al.
patent: 5422869 (1995-06-01), Versleegers
patent: 5528567 (1996-06-01), Kim
patent: 5563857 (1996-10-01), Park
patent: 5734630 (1998-03-01), Nishigori et al.

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