Method for writing data into an image repetition memory of a dat

Details Method for writing data into an image repetition memory of a dat Method for writing data into an image repetition memory of a dat

1986-02-21

1990-11-13

Oberley, Alvin F.

Communications: electrical

Land vehicle alarms or indicators

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

340798, 340799, G09G 106

Patent

active

049705016

ABSTRACT:
With a data display terminal having an electron beam tube, an image repetition memory serves for cyclically regenerating the display. With a change of the display, a complete overwriting can be necessary. However, the overwriting of the image repetition memory cannot interrupt the regeneration operation. The beam flyback times during an image cycle do not suffice in order to overwrite the entire image repetition memory. Therefore, data are written into the image repetition memory during a forward line scan and are simultaneously written into a line buffer designed as a clock interface. With this technique, an entire image repetition memory can be written during an image cycle.

REFERENCES:
patent: 4117469 (1978-09-01), Levine
patent: 4146877 (1979-03-01), Zimmer
patent: 4177462 (1979-12-01), Chung

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