Field emission device with auto-activation feature

Details Field emission device with auto-activation feature Field emission device with auto-activation feature

1997-09-03

1999-12-14

Shingleton, Michael

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

3151693, 345 76, G09G 300

Patent

active

060022094

ABSTRACT:
A field emission device is described that comprises, in addition to the main, conventional array of field emission devices and its associated driving circuits, an additional, separate, pixel-sized group of field emission devices close to, but separated from, said main array. Electrons emitted by the additional pixel are collected on a separate, non fluorescent, anode and additional circuitry is provided, including a feedback loop from a detector of the additional pixel's cathode current to the gate voltage supply of the main array. Consequently the voltage of the gate lines varies in inverse proportion to the cathode current of the additional pixel. This results in a display whose brightness is constant even when turned on for the first time or after a period of idleness. A method for manufacturing the device is also described.

REFERENCES:
patent: 5552677 (1996-09-01), Pagones
patent: 5578906 (1996-11-01), Smith

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