Dispenser cathode

Details Dispenser cathode Dispenser cathode

1990-12-31

1992-06-30

Yusko, Donald J.

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

H01J 1906

Patent

active

051266237

ABSTRACT:
A dispenser cathode comprises an electron emissive materials, a porous base body containing tungsten, a reservoir storing the porous base body, and a sleeve storing the heater therein. The porous base body contains TiO.sub.2 or ZrO.sub.2. The dispenser cathode achieves high luminance and high definiteness required by a large-sized display and the time for manufacturing the cathode is reduced.

REFERENCES:
patent: 4810926 (1989-03-01), Schwarz et al.
patent: 4976644 (1990-12-01), Jung
patent: 4982133 (1991-01-01), Choi

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