Optical disk player with disk size and pickup location responsiv

Details Optical disk player with disk size and pickup location responsiv Optical disk player with disk size and pickup location responsiv

1988-10-12

1991-10-08

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4432, 369 47, 369 58, G11B 7095

Patent

active

050560751

ABSTRACT:
An optical disk player for reproducing information stored on various types of optical disks, such as video disks and compact disks having diameters different from that of the video disk, for recording audio signals and for recording audio and video signals, wherein a skew sensor detects an inclination of an optical disk relative to an optical pickup, a skew servo mechanism controls the inclination of the optical pickup, relative to the optical disk on the basis of the detected inclination, a disk size detector detects the size of the disks, a disk detector detects signals, recorded in audio and audio/video compact disks indicative of the type of optical disk, and on the basis of the detected outputs from the size detector and the disk detector, the skew servo is effected continuously from the innermost track to outermost track or slightly before the outermost track when the disk is a video disk or audio/video compact disk, but wherein the skew servo is stopped at a predetermined position inwardly of the outerost track when the disk is an audio compact disk.

REFERENCES:
patent: 4634853 (1987-01-01), Kanamaru
patent: 4636628 (1987-01-01), Tsukai
patent: 4661942 (1987-04-01), Yoshimoto et al.
patent: 4674078 (1987-06-01), Otsuka et al.
patent: 4698695 (1987-10-01), Kosaka et al.
patent: 4761692 (1988-08-01), Yoshida et al.
patent: 4773052 (1988-09-01), Sugiura
patent: 4780865 (1988-10-01), Yamakawa
patent: 4885644 (1989-12-01), Ishii et al.
Pioneer Service Manual for Laser Disc Player VP-1000, May 1980.

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