CRT with field-emission cathode

Details CRT with field-emission cathode CRT with field-emission cathode

1977-06-15

1979-12-11

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313309, 313444, H01J 102, H01J 2948

Patent

active

041785312

ABSTRACT:
A cathode-ray tube comprises an evacuated envelope having therein a target and an electron-beam-producing means including a field-emission cathode therein. The beam-producing means comprises a plurality of spaced, pointed protuberances pointing in the same direction. Each protuberance has its own field-emission-producing means, a separate focusing-field-producing means for focusing the electrons emitted from the protuberance into a beam and means for modulating the individual beams in concert. The structure produces a plurality of modulated beams that are projected as a bundle in substantially parallel paths, which may be further operated upon as a single composite beam.

REFERENCES:
patent: 3665241 (1972-05-01), Spindt et al.
patent: 3755704 (1973-08-01), Spindt et al.
patent: 3855499 (1974-12-01), Yamada et al.
patent: 3921022 (1975-11-01), Levine

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