Display control device for superimposing data with a broadcast s

Details Display control device for superimposing data with a broadcast s Display control device for superimposing data with a broadcast s

1990-01-11

1993-04-13

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340703, 358183, G09G 100

Patent

active

052026698

ABSTRACT:
A cathode-ray tube control device displays data obtained from a personal computer on the screen of a television receiver in superimposing relation to the picture of a broadcast. Clock pulses are generated, and these are counted in synchronism with the horizontal and vertical synchronizing signals from the television receiver. Display timing signals including horizontal scanning display period signal, horizontal retrace period signal, vertical scanning display period signal, and vertical retrace period signal are delivered in response to the resultant counts. Then, read-out of data to be displayed is controlled in accordance with the produced timing signals, and the read data is displayed on the screen such that it is superimposed on the picture of a television broadcast. If desired, the frequency of the timing signals may be slightly varied so as to scroll said data across the television picture.

REFERENCES:
patent: 3891792 (1975-06-01), Kimura
patent: 3903510 (1975-09-01), Zobel
patent: 4209832 (1980-06-01), Gilham et al.
patent: 4281345 (1981-07-01), Warn
patent: 4309700 (1982-01-01), Kraemer
patent: 4320395 (1982-03-01), Meissen et al.
patent: 4342029 (1982-07-01), Hofmanis et al.
patent: 4346407 (1982-08-01), Baer et al.
patent: 4425581 (1984-01-01), Schweppe et al.
patent: 4899139 (1990-02-01), Ishimochi et al.

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