Fluorescent display tube drive apparatus

Details Fluorescent display tube drive apparatus Fluorescent display tube drive apparatus

1987-03-11

1989-05-30

Moore, David K.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

3151694, 340767, G09F 900

Patent

active

048354473

ABSTRACT:
A fluorescent display tube drive apparatus of the type used with a vehicle instrument panel or the like. The apparatus includes a transparent electrode arranged opposite to anodes and filaments. Ac voltages are applied to the filaments for the emission of thermoelectrons and a pulsating voltage is applied to the transparent electrode to cause pulsation of the potential difference between the filaments and the transparent electrode, thereby causing the thermoelectrons to impinge uniformly on the anodes.

REFERENCES:
patent: 4472660 (1984-09-01), Knothe et al.
patent: 4495445 (1985-01-01), Turney

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