Circuit arrangement for operating opto-electronic display elemen

Details Circuit arrangement for operating opto-electronic display elemen Circuit arrangement for operating opto-electronic display elemen

1981-02-27

1982-10-19

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

340782, 340813, G09G 332

Patent

active

043553087

ABSTRACT:
For displaying switching states and/or operating states, control switch-luminescent diode combinations are connected at intersections of row drive lines and column drive lines so that application of appropriate potentials to the drive line cause selective energization of the luminescent diodes. A plurality of controllable semiconductor switches are connected to be driven by the column drive lines and are connected to shunt those control switch-luminescent diode combinations which are not to be activated. A current limiting circuit is connected between the luminescent diodes and a supply voltage and is operable from a low ohmic state to a high ohmic state in response to switch-through of all of the controllable semiconductor switches.

REFERENCES:
patent: 4198629 (1980-04-01), Marion

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