Driver circuitry for plasma display panel

Details Driver circuitry for plasma display panel Driver circuitry for plasma display panel

1978-05-05

1979-12-25

Smith, Alfred E.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

340789, H05B 3700, H05B 3900, H05B 4100

Patent

active

041807626

ABSTRACT:
Sustainer drive circuitry for an AC plasma display panel wherein a multiple level sustainer signal is applied to panel electrodes along one axis only. The sustainer circuit includes a pair of series connected NPN pull-high and pull-down output driver transistors which (a) are respectively driven by low voltage drive circuits isolated from the NPN output driver transistors by capacitors; (b) respectively charge up the panel to a relatively high voltage and discharge the panel to ground; and (c) include a feedback network for limiting the rise time of the high voltage across the panel for reducing noise and electromagnetic interference. Diode circuitry insures that these output driver transistors are turned on and off without ringing and are never driven on simultaneously. A common voltage supply provides both (a) the write pulse level and (b) the write pedestal level of the sustainer waveform. The invention further provides a border sustain driver circuit for one axis which comprises simple and inexpensive integrated circuit logic gates.

REFERENCES:
patent: 4070600 (1978-01-01), Butler et al.
patent: 4097856 (1978-06-01), Lamoureux et al.

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