Picture pick-up or display device for successive scanning in opp

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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Details

358148, 315387, H04N 504

Patent

active

050478559

ABSTRACT:
A picture pick-up or display device for picking up a scene or for displaying a scene image includes a line deflection circuit for generating a symmetrical line deflection current, a video signal processing circuit having a memory for storing video information, and a clock oscillator for generating a read clock signal for the memory. The oscillator is controlled in such a way that a first and a second signal occur substantially simultaneously at measuring instants, the first signal originating from the line deflection circuit and the second signal originating from a signal generator. The first signal is applied by a maximum value detector substantially at the instant when the line deflection current has a maximum value. The measuring instants are substantially located at the instants when a counter counting the clock signal pulses supplies a count during the line blanking interval.

REFERENCES:
patent: 4510527 (1985-04-01), den Hollander
patent: 4543614 (1988-09-01), Chen
patent: 4667232 (1987-05-01), Long
patent: 4672449 (1987-06-01), Kraus et al.

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