Vacuum fluorescent display system, digital power supply

Details Vacuum fluorescent display system, digital power supply Vacuum fluorescent display system, digital power supply

1986-10-06

1987-11-03

Dixon, Harold

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

3151694, 315307, G09G 310

Patent

active

047045604

ABSTRACT:
A digital pulsewidth modulator switch regulator is used in a power supply for a multisection vacuum fluorescent display system. Pulsewidth modulations are based on grid and anode load characteristics of each section of the display, stored prior to system operations in a designated location of memory of a microcomputer used for controlling switching regulations. Display voltage updates are made utilizing the stored data as well as new load data derived from the power supply output voltage feedback signals indicative of changes in the display voltage.

REFERENCES:
patent: 4178593 (1979-12-01), Kishino et al.
patent: 4472660 (1984-09-01), Knothe et al.
patent: 4642524 (1987-02-01), Eaton et al.

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