Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1991-11-12
1993-06-08
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358907, 369 4428, 369 32, H04N 576, G11B 1722, G11B 700
Patent
active
052184536
ABSTRACT:
A video disc apparatus including a disc rotating device for rotating an optical video disc at a constant linear velocity, a tracking servo device for causing an optical pickup to tack a recording track on the optical video disc, and a translating device for translating the optical pickup along the radius of the optical pickup. It is detected by a detection device if the rotational frequency of the optical video disc by the disc rotating device is within a frequency range in the vicinity of the resonance frequency of the optical pickup. Depending on a detection output of the detection device the operation of an access controlling device is switched so that, in the frequency range in the vicinity of the resonance frequency of the optical pickup, a track jump control is performed for shifting the optical pickup towards the target track position on on the optical video disc with the tracking servo device in the energized state.
REFERENCES:
patent: 3876842 (1975-09-01), Merer et al.
patent: 3909608 (1975-04-01), Bouwhuis
patent: 4774699 (1988-09-01), Giddings
patent: 4887253 (1989-12-01), Tateishi
patent: 5111305 (1992-05-01), Yamashita
patent: 5134500 (1992-07-01), Tobe
patent: 5148417 (1992-09-01), Wong et al.
Chin Tommy P.
Shaw, Jr. Philip M.
Sony Corporation
Tran Thai
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