On chip vacuum fluorescent display drive

Details On chip vacuum fluorescent display drive On chip vacuum fluorescent display drive

1978-06-21

1980-06-24

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

315 846, 315 97, 315105, H05B 4300

Patent

active

042097290

ABSTRACT:
An improved arrangement for providing cathode heating current in a visual display wherein pulses of heating current are sequentially applied at brief intervals, the magnitude of the current and the intervals being coordinated with the cathode thermal inertia so as to maintain cathode temperature within an operative range during the off periods, and wherein potentials for activating the display are applied during such off periods.

REFERENCES:
patent: 3553525 (1971-01-01), McGuirk

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