Electron emitter with focussing arrangement

Details Electron emitter with focussing arrangement Electron emitter with focussing arrangement

1977-11-02

1979-03-20

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

313299, 313309, 313336, H01J 2308

Patent

active

041456351

ABSTRACT:
An electron emitter comprises field emitter zones formed by projections of field emissive material separated by regions which are not field emissive. An extractor electrode for applying an electric field to the projections and a focus electrode have openings aligned with the emitter zones and material particles aligned with the non-emissive regions. The electrodes form, when suitably energised electron focussing fields to focus electrons emitted from the zones.

REFERENCES:
patent: 3921022 (1975-11-01), Levine
patent: 3921027 (1975-11-01), Shelton et al.

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