Modular columnar electroluminescent display control circuit

Details Modular columnar electroluminescent display control circuit Modular columnar electroluminescent display control circuit

1977-03-11

1979-02-20

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340166EL, G06F 314

Patent

active

041410025

ABSTRACT:
The electroluminescent display provides a columnar, bar, or the like incremental analog presentation of an unknown unidirectional electric signal amplitude. Employing a stacked array of luminescent diodes, each diode of the diode array is associated with a circuit element controlled by a voltage comparator and an illumination intensity modulation source. The control circuits and diodes are adapted to use in simple cascaded modular circuit form permitting a wide range of choices of the number of diodes in the bar display and therefore, of its useful voltage indicating range. Variable pulse duty cycle brightness control is afforded.

REFERENCES:
patent: 3651511 (1972-03-01), Andrews et al.
patent: 3987392 (1976-10-01), Kugelmann et al.
patent: 4060802 (1977-11-01), Matsuki

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