Current-regulated field emission cathodes for use in a flat pane

Details Current-regulated field emission cathodes for use in a flat pane Current-regulated field emission cathodes for use in a flat pane

1993-02-01

1994-10-18

Mis, David

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

315334, 315339, 315349, 315DIG7, H05B 4136, H01J 1736

Patent

active

053571720

ABSTRACT:
In a flat panel display in which low-voltage row and column address signals control a much higher pixel activation voltage by respectively gating at least one pair of series coupled MOSFETs to ground for each pixel, effective current regulation is achieved by placing a current-regulating resistor in series with each pair of the series-coupled MOSFETs. The resistor is coupled directly to ground and to the source of the MOSFET furthest from the emitter node. By coupling the current-regulating resistor directly to the ground bus, stable current values are achieved over a wide range of cathode voltages.

REFERENCES:
patent: 3329949 (1967-07-01), Colton et al.
patent: 3611022 (1971-10-01), Galusha
patent: 4940916 (1990-07-01), Borel et al.
patent: 5162704 (1992-11-01), Kobori et al.

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