Display controller

Details Display controller Display controller

1987-04-02

1990-01-30

Oberley, Alvin

Communications: electrical

Land vehicle alarms or indicators

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

340750, 340799, G09G 114

Patent

active

048976377

ABSTRACT:
A display controller including a first ROM, a second ROM, a RAM, and an output circuit. The first ROM stores fixed data to be displayed on a fixed data area of a display screen. The RAM stores variable data to be displayed on a variable data area of the display screen and receives controlling addresses from the first ROM. The second ROM, under control of data from a preselected one of the first ROM or the RAM, outputs the display pattern data to be displayed on the display device. The output circuit latches the display pattern data and sends it to the display device at a predetermined timing.

REFERENCES:
patent: 3566361 (1968-07-01), Lavertn et al.
patent: 3967268 (1976-06-01), Roberts
patent: 4107741 (1978-08-01), Lemelson
patent: 4213124 (1980-07-01), Barda et al.
patent: 4314357 (1982-02-01), Kimura et al.
patent: 4598284 (1986-07-01), Ikegami et al.
patent: 4625203 (1986-11-01), DiNitto et al.
patent: 4679027 (1987-07-01), Higuchi

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