Track jump controlling apparatus

Details Track jump controlling apparatus Track jump controlling apparatus

1993-05-25

1995-04-18

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4428, 369 4432, 369 32, G11B 700

Patent

active

054084547

ABSTRACT:
A track jump controlling apparatus controls a track jump operation of an optical pickup, which is adapted to emit a light beam onto a recording medium of disc shape, receive a reflected or transmitted light from the optical disc and generate a tracking error signal. The track jump controlling apparatus is provided with: a tracking servo-controlling device, coupled to the optical pickup, for performing a tracking servo-control on the basis of the tracking error signal; a driving device for driving the optical pickup to move the light beam in a radial direction of the recording medium according to jump data including a kick pulse to accelerate the light beam and a brake pulse to decelerate the light beam; an eccentricity detecting device for detecting an amount of eccentricity of the recording medium, and outputting an eccentricity signal which indicates the amount of eccentricity; and a jump data generating device, coupled to the eccentricity detecting device and the driving device, for changing at least one of a pulse width and a crest value of the brake pulse on the basis of the eccentricity signal, and generating the jump data to the driving device.

REFERENCES:
patent: 4745587 (1988-05-01), Maeda et al.
patent: 4884259 (1989-11-01), Horikawa et al.
patent: 5157513 (1992-10-01), Yamashita

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