Power supply for vacuum fluorescent displays

Details Power supply for vacuum fluorescent displays Power supply for vacuum fluorescent displays

1994-05-02

1995-08-15

Neyzari, Ali

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

3151693, 315337, 315168, 345 75, G09G 310, H05B 4100

Patent

active

054422590

ABSTRACT:
A power supply for a large or dual vacuum fluorescent display having a DC source coupled to a switching regulator to generate a stepped up DC voltage. A -5 volt regulator is coupled to the switching regulator output, to provide a second DC voltage. A grid and segment driver is supplied with the regulator output. The driver is coupled to a microprocessor, and selectively drives the grid and plate segments to display data from the microprocessor. An oscillator circuit is also coupled to the DC source to generate an AC signal. The AC signal is coupled to an inverter to generate a second phase-shifted AC signal. The AC signals are provided to a pair of output drivers which amplify and output each signal to opposite ends of the filaments to heat the display filaments.

REFERENCES:
patent: 4158794 (1979-06-01), Sandler
patent: 4212157 (1980-07-01), Frey
patent: 4495445 (1985-01-01), Turney
patent: 4691145 (1987-09-01), Satoh
patent: 4719389 (1988-01-01), Miesterfeld
patent: 4973882 (1990-11-01), Waugh
patent: 5001399 (1991-03-01), Layden
patent: 5155413 (1992-10-01), Bozzer et al.
Oki Data Book "Vacuum Fluorescent Driver" Third Edition Issued Aug., 1992, pp. 279-291.

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