Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-08-26
1987-06-09
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 64, 358158, 358217, 358219, 358242, 315389, 315399, 340814, H04N 504, H01J 2970
Patent
active
046724494
ABSTRACT:
A picture pick-up or display device, respectively for recording a scene or displaying a scene image, respectively with the aid of a line raster formed by a plurality of horizontal lines which are consecutively scanned in opposite directions. The device comprises a line deflection circuit in which the line deflection coil forms part of a resonant circuit whose tuning frequency is substantially equal to half the line frequency, as a result of which the power dissipation is kept low. By means of a control circuit it is ensured that corresponding points of scanned lines are accurately in line in the vertical direction, the control circuit being arranged for causing a zero-crossing of the line deflection current and a signal which is characteristic of half the video information of a line substantially to coincide. The control circuit comprises an analogue delay element for setting the time position of this signal.
REFERENCES:
patent: 4463288 (1984-07-01), Judd
patent: 4510527 (1985-04-01), den Hollander
Boon Cornelis A. M.
Boudewijns Arnoldus J. J.
Frensch Adrianus J.
Kraus Uwe E.
Briody Thomas A.
Groody James J.
Oisher Jack
Parker Michael D.
Streeter William J.
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