Vacuum fluorescent indicator

Details Vacuum fluorescent indicator Vacuum fluorescent indicator

1978-01-11

1980-06-03

Rolinec, Rudolph V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Balancing

324 96, 324122, 340753, G01R 1702, G01R 1900

Patent

active

042064040

ABSTRACT:
A vacuum fluorescent display has a filament heated below incandescence and phosphor coated anodes. A foraminous charge-control electrostatic lens between the filament and the viewer both controls uniform illumination of the anodes and also comprises part of a contrast-enhancement element. An embodiment of the invention with a linear array of anodes and an analog-to-digital power supply forms a linear scale indicator.

REFERENCES:
patent: 2956194 (1960-10-01), Alma et al.
patent: 3668466 (1972-06-01), Shimada
patent: 3682531 (1972-08-01), Jeffers
patent: 3967158 (1976-06-01), Saxon
patent: 4004186 (1977-01-01), Bylander
patent: 4004220 (1977-01-01), Kerber et al.
patent: 4007396 (1977-02-01), Wisbey et al.
patent: 4023876 (1977-05-01), Fukunaga et al.
patent: 4110665 (1978-08-01), Moore

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