Voltage controlled sustain frequency in a gas display panel

Details Voltage controlled sustain frequency in a gas display panel Voltage controlled sustain frequency in a gas display panel

1976-03-30

1977-04-12

Segal, Robert

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

315169R, H05B 4300, H05B 4100, H05B 4130

Patent

active

040177629

ABSTRACT:
A circuit for supplying sustain voltage pulses to the orthogonal conductors of a gas display panel including voltage sensors to sense any change in sustain voltage amplitude with aging of the circuits and a voltage controlled oscillator to shift the operating frequency of sustain pulses as the amplitude changes. In that manner, the operating point of sustain voltage vs. frequency is shifted to take advantage of the slope in a graphical representation of sustain voltage margin to allow for shifting of the margin due to panel aging.

REFERENCES:
patent: 3801863 (1974-04-01), Lee
patent: 3839657 (1974-10-01), Nakayama et al.
patent: 3843905 (1974-10-01), Leuck et al.

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