Luminescent display device having conductors for field control

Details Luminescent display device having conductors for field control Luminescent display device having conductors for field control

1978-03-15

1980-08-05

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340713, 340759, 340774, 313496, 313519, G06F 314

Patent

active

042164702

ABSTRACT:
A luminescent display device for analog display having segment anodes provided linearly on a substrate and each coated with a luminescent material layer, the segment anodes being selectively given an anode voltage according to information inputted, a filament provided above the segment anodes for emitting thermions when heated, the thermions selectively impinging on the segment anodes so as to make them emit light, and conductors each provided above and opposite to a gap existing between every two adjacent segment anodes, the conductors being kept positive with respect to the filament. The conductors provide a control for the anode field which prevents the "shade" phenomenon from occurring on the anodes.

REFERENCES:
patent: 3800178 (1974-03-01), Farina
patent: 3936697 (1976-02-01), Scott
patent: 4100455 (1978-07-01), DuBois

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