Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Patent
1980-11-20
1982-06-01
La Roche, Eugene R.
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
340714, H05B 4114
Patent
active
043330398
ABSTRACT:
A pilot cell driver for a capacitive memory plasma display device having three output states: high, low, and floating. The floating state of the pilot cell driver is used in combination with a feedback of the plasma display panel sustain voltage to create a third voltage level on the pilot cell drive line for use in rewriting the pilot cells. The pilot cell driver is comprised of a pull-up switch and pull-down switch. After the pull-up switch is activated for a short period of time, the output of the pilot cell driver relaxes to the floating state. The floating state voltage is achieved, for example, on a vertically oriented pilot cell drive line by coupling to a horizontal sustain drive voltage which switches from the pull-up voltage to the pull-down voltage during the relaxation time of the pilot cell driver. By capacitively coupling the horizontal sustain voltage to the vertical pilot cell drive electrode, the floating state voltage is achieved.
REFERENCES:
patent: 3750159 (1973-07-01), Wojcik
patent: 3786484 (1974-01-01), Miavecz
patent: 3879634 (1975-04-01), Pfaender et al.
patent: 4077033 (1978-02-01), Strom
patent: 4091309 (1978-05-01), Strom
patent: 4180762 (1979-12-01), Weber
Control Data Corporation
Genovese Joseph A.
La Roche Eugene R.
McGinnis William J.
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