Lighting method for vacuum fluorescent display with reduced flic

Details Lighting method for vacuum fluorescent display with reduced flic Lighting method for vacuum fluorescent display with reduced flic

1986-05-08

1988-12-13

Moore, David K.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

315168, 315174, 340791, H05B 3700, H05B 3900

Patent

active

047913371

ABSTRACT:
A lighting method for vacuum fluorescent display which is lighted dynamically with frequency f.sub.1 includes applying a time-varying voltage with approximate frequency of (n+1/2)f.sub.1 to the cathode of the vacuum fluorescent display, where n is a predetermined natural number.
By the method described, flickering in the display is suppressed even when, in the dynamical lighting of the vacuum fluorescent display, the cathode of the vacuum fluorescent display is heated with a time-varying voltage and the lighting duty ratio is reduced.

REFERENCES:
patent: 3343030 (1967-09-01), Dragon et al.
patent: 3659149 (1972-04-01), Fleming
patent: 4158794 (1979-06-01), Sandler
patent: 4204209 (1980-05-01), Suehiro
patent: 4234821 (1980-11-01), Kako et al.
patent: 4459514 (1984-07-01), Morimoto et al.
patent: 4622549 (1986-11-01), Criscimanga et al.

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