Aircraft cockpit switch circuitry

Details Aircraft cockpit switch circuitry Aircraft cockpit switch circuitry

1993-12-27

1995-10-17

Hjerpe, Richard

Computer graphics processing and selective visual display system

Plural physical display element control system

Segmented display elements

345 82, 34081545, 250205, G09G 314

Patent

active

054594782

ABSTRACT:
A switch circuit for selectively driving a LED display at either a dim or bright intensity in response to varying input voltages is provided. The switch circuit includes a current regulator device which is responsive to a reference voltage and is coupled to a LED display device for supplying a first level of constant current therethrough so as to illuminate the display device at a dim intensity and for supplying a second level of constant current therethrough so as to illuminate the display device at a bright intensity. A controllable switching device is responsive to input voltages of a wide varying range for being selectively turned on and off and for generating the reference voltage.

REFERENCES:
patent: 3813664 (1974-05-01), Geyer
patent: 4626102 (1977-05-01), Wecker

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