Method for energizing vacuum fluorescent displays

Details Method for energizing vacuum fluorescent displays Method for energizing vacuum fluorescent displays

1985-12-23

1988-01-12

Moore, David K.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

3151694, 340 74, 340 77, 340 79, 340766, 340781, 340789, 340803, 34082522, H05B 3700

Patent

active

047193891

ABSTRACT:
A microcomputer controls the energization of both a transformer and display latch driver in a power supply for a vacuum fluorescent display to prevent display flashing at power down. Also provided is the synchronization of the filament voltage to the grid voltage to prevent display pulsations.

REFERENCES:
patent: 4209729 (1980-06-01), McElroy
patent: 4241278 (1980-12-01), Walther
patent: 4241294 (1980-12-01), Fisler
patent: 4476466 (1984-10-01), Mitani et al.
patent: 4495445 (1985-01-01), Turney
patent: 4570151 (1986-02-01), Martorano et al.
patent: 4622843 (1986-11-01), Hormel
patent: 4677754 (1987-07-01), Hormel
patent: 4682146 (1987-07-01), Friedman, III
Itron Vacuum Fluorescent Display 128.times.128 Dot Matrix Graphic Display, by Tsuyoshi Suzuki (SAE 810169), Feb. 1981.
Planar Vacuum Fluorescent Displays, by Kiyoshi Morimoto (SAE 810078), Feb. 1981.
Trend in Vacuum Fluorescent Displays, by Morimoto and Pykosz (SAE 820264), Feb. 1982.
Switching Power Supply Design for Automotive Instrumentation, by Steven K. Kirkman (SAE 820109), Feb. 1982.
High Efficiency Low Cost Vacuum Fluorescent Display Power Supply, by F. Miesterfeld (SAE 830046), Feb. 1983.

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