Multiplexed scan display circuit

Details Multiplexed scan display circuit Multiplexed scan display circuit

1979-11-19

1981-04-14

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

340762, 340799, G06F 314

Patent

active

042622921

ABSTRACT:
A circuit for controlling the updating of a display in which selected characters are displayed at selected positions therein. The circuit includes a memory unit having a plurality of addresses thereto and a processor for writing character data in the memory unit at the addresses, with the addresses corresponding to predetermined positions in the display. The memory unit also has a plurality of outputs which are operatively coupled to the display to enable the display to generate characters corresponding to the associated character data at selected positions in the display when the addresses are selected. The circuit also includes a counter unit which is specially wired for selecting the addresses for the characters to be displayed, and also for selecting the positions at which the characters are displayed. A control circuit enables either the processor or the counter unit to address the memory unit.

REFERENCES:
patent: 3747073 (1973-07-01), Sharpless
patent: 3787833 (1974-01-01), Rogers
patent: 3821731 (1974-06-01), Levine
patent: 3866171 (1975-02-01), Loshbough
patent: 3911424 (1975-10-01), Giannuzzi et al.
patent: 3937999 (1976-02-01), Schott
patent: 3955189 (1976-05-01), Thomson
patent: 3962701 (1976-06-01), Heimbigner
patent: 3999180 (1976-12-01), Hickman
patent: 4044280 (1977-08-01), Shulski
patent: 4125993 (1978-11-01), Emile

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