Display control circuit

Details Display control circuit Display control circuit

1988-05-20

1990-07-17

Oberley, Alvin

Communications: electrical

Land vehicle alarms or indicators

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

340799, G09G 100

Patent

active

049423894

ABSTRACT:
A display control circuit includes a video memory for storing display data assigned with a plurality of bits corresponding to each pixel of a display screen of a display device, and at least one color designation circuit. Each color designation circuit includes a rewritable color value register, a selector for selecting outputs from the color value register in accordance with color signal information of the display data read out from the video memory, an element number register for storing preset element numbers, an element number coincidence detector for comparing element number information of the display data read out from the video memory with the preset element numbers, and an output buffer, controlled in accordance with an output from the element number coincidence detector, for supplying a signal to a driver for the display device.

REFERENCES:
patent: 4672368 (1987-06-01), Williams
patent: 4772881 (1988-09-01), Hannah
Artwick, "Microcomputer Displays, Graphics, and Animation", Prentice-Hall, New Jersey, 1985, pp. 64-66.

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