Color display having selectable off-on and background color cont

Details Color display having selectable off-on and background color cont Color display having selectable off-on and background color cont

1977-12-27

1979-04-10

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

340750, G06K 1520

Patent

active

041491521

ABSTRACT:
Circuit for controlling the color of dot elements in a raster scan display. A data memory stores the state (on or off) of dot elements which are mapped onto the raster scan display. At least one smaller auxiliary memory is provided to store one set of color information specifying the color of a plurality of contiguous dot elements when the dot states have one value and another set of color information specifying the color of the plurality of contiguous dot elements when the dot states have the other value. There is also a selectable background color circuit for controlling the color outside an active display area.

REFERENCES:
patent: 3603962 (1971-09-01), Lechner
patent: 3624634 (1971-11-01), Clark
patent: 3668686 (1972-06-01), Strohmeyer
patent: 3771155 (1973-11-01), Hayashi et al.
patent: 3811113 (1974-05-01), Saito et al.
patent: 3911418 (1975-10-01), Takeda
patent: 4016544 (1977-04-01), Morita et al.

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