Communications: electrical – Visual indication – Movable
Patent
1985-12-23
1989-07-04
Britton, Howard W.
Communications: electrical
Visual indication
Movable
340781, 315246, 3151693, H05B 3700
Patent
active
048454893
ABSTRACT:
An electroluminescent display drive circuit which compensates for the decrease in capacitance of the electroluminescent display panel that is experienced as the panel ages; this is accomplished by use of an RC time constant which will effectively increase the voltage presented across the electroluminescent display panel as the capacitive element of the RC time constant decreases with the age of the panel. Also presented is high frequency power supply to excite electroluminescent displays without a transformer such that the voltage across the display is in phase with the current through the display thereby reducing the effect of power factor and electromagnetic interference.
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D.C. Electroluminescence For Automobile Instruments by B. Shepherd, R. N. Thomas and P. J. Smith; published by the Institute of Electrical Engineers, Jul. 6-9, 1976.
Electroluminescent Instrumentation by B. Shepherd, (SAE 810076), Feb. 1981.
Britton Howard W.
Calcaterra Mark P.
Chrysler Motors Corporation
Powell Mark R.
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