Flat surface emitter for use in field emission display devices

Details Flat surface emitter for use in field emission display devices Flat surface emitter for use in field emission display devices

1998-04-30

2000-01-04

Wong, Don

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

3151694, 313309, 345 74, H01J 130

Patent

active

060113561

ABSTRACT:
For use in cathodoluminescent field emission display devices, a cathode emitter can comprise an inverted field effect transistor having a diamond film or other low effective work function material deposited onto the channel layer of the transistor, such that the diamond film provides a source of primary electron emissions. A variable voltage source is applied to the gate of the transistor creating an electric field that controls the conductivity of the channel layer, thereby activating or deactivating electron emissions from this cathode emitter structure. In addition, electron blocking junctions can be incorporated into the emitter structure to inhibit current flow through the device during a deactivated state. In a variation, the transistor of the cathode emitter has the diamond film being deposited onto an electrically conductive pad that is electrically connected to, and extending outwardly from, the transistor. Alternatively, a sideways laterally gated transistor structure can be used with the emitter surface being applied to the transistor's drain. A near mono-molecular oxide film of high secondary electron emission material can also be included on the emitter surface for enhanced electron emissions.

REFERENCES:
patent: 5099296 (1992-03-01), Mort et al.
patent: 5412285 (1995-05-01), Komatsu
patent: 5430348 (1995-07-01), Kane et al.
patent: 5469014 (1995-11-01), Itoh et al.
patent: 5557159 (1996-09-01), Taylor et al.
patent: 5578906 (1996-11-01), Smith
patent: 5633513 (1997-05-01), Koyama et al.
patent: 5866988 (1999-02-01), Oda

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