Optical disk tracking system for searching a target track based

Details Optical disk tracking system for searching a target track based Optical disk tracking system for searching a target track based

1994-12-27

1996-10-15

Dinh, Tan

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

360 7807, 369 4425, G11B 1722

Patent

active

055661483

ABSTRACT:
When a optical head is moved towards a appointed track, a reference velocity is read out from reference velocity calculation data in accordance with the number of remaining tracks latched in a track counter circuit. Using the reference velocity calculation data, a compensated reference velocity is calculated from the read out reference velocity. A linear motor control circuit is controlled on the basis of the compensated reference velocity. Thereby, the velocity of the optical head is controlled. In addition, when the optical head is moved towards the appointed track, it is determined whether the optical head is in an acceleration operation mode or in a deceleration operation mode. If the optical head is in the acceleration operation mode, the velocity is controlled by using the reference velocity. If the optical head is in the deceleration operation mode, the velocity is controlled by using the compensated reference velocity.

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patent: 4622604 (1986-11-01), Hasimoto et al.
patent: 5033037 (1991-07-01), Yanagi
patent: 5117410 (1992-05-01), Akiyama
patent: 5164931 (1992-11-01), Yamaguchi et al.
patent: 5301174 (1994-04-01), Matoba et al.
patent: 5305161 (1994-04-01), Giovanetti et al.
patent: 5398221 (1995-03-01), Ogawa
patent: 5428590 (1995-06-01), Ogino
Patent Abstracts of Japan, vol. 13, No. 303 (P-896), Jul. 12, 1989, JP-A-01-076574, Mar. 22, 1989.

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