Control apparatus for a display matrix

Details Control apparatus for a display matrix Control apparatus for a display matrix

1980-09-12

1983-05-10

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340802, 34081506, G09G 300

Patent

active

043832547

ABSTRACT:
A display matrix of LEDs responds to two coordinate display input signals representative of display positions each defined by a respective LED in the matrix, an input switch unit adapted for use by a disabled person being coupled to the matrix, so that the user can selectively actuate any one of a plurality of the LEDs, by a microprocessor equipped with an ROM holding the operating program for the microprocessor and an RAM in which sets of position coordinates of the matrix can be temporarily stored and recalled under the control of the user so that the user can write a message into the RAM by selecting a sequence of matrix positions corresponding to a sequence of words visibly displayed at respective LEDs and subsequently recall and display the message by selecting a read position in the matrix.

REFERENCES:
patent: 3187321 (1965-06-01), Kameny
patent: 3737898 (1973-06-01), Cross, Jr.
patent: 3818448 (1974-06-01), Wilkins
patent: 3824723 (1974-07-01), Gargas
patent: 4101884 (1978-07-01), Benton, Jr.
patent: 4241521 (1980-12-01), Dufresne

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