Optical head position control for optical recording device

Details Optical head position control for optical recording device Optical head position control for optical recording device

2005-03-29

2005-03-29

Dinh, Tan (Department: 2653)

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

C369S030270, C369S033010

Reexamination Certificate

active

06873577

ABSTRACT:
a data player or a method in which a reading and/or writing head is positioned according to anyone of 3 methods or combinations thereof: Calculating a desirable speed curve to position the head from a first to a second position and adjust the speed of the head's movement to the desirable speed, calculating and outputting an amount of energy to a driving mechanism to move the head a determined number of steps, increasing the power applied to a driving mechanism until the head is moved for one step. The positioning may additionally be used to perform coarse positioning while the head is positioned on a track of a data medium using a fine positioning mechanism.

REFERENCES:
patent: 4680746 (1987-07-01), Senso
patent: 4851755 (1989-07-01), Fincher
patent: 4977539 (1990-12-01), Lee
patent: 6172946 (2001-01-01), Furukawa et al.
patent: 0443847 (1991-08-01), None
patent: 0617416 (1994-09-01), None
patent: 0800128 (1997-10-01), None
patent: 05-56690 (1993-03-01), None
*Patent Abstracts of Japan, vol. 017, No. 371, Jul. 13, 1993 and JP Patent 5-056690.

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