Electron gun

Details Electron gun Electron gun

1978-10-03

1980-08-19

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

313449, H01J 2946, H01J 2956

Patent

active

042186340

ABSTRACT:
An electron gun comprising a plurality of focusing grids spatially arranged along the path of an electron beam generated from a cathode and each bored with at least one opening for allowing the passage of the electron beam, wherein at least one of said plural focusing grids is formed of at least one electrode set at a grounding potential or a lower potential than a focusing voltage and at least one more electrode whose potential is defined by an electrostatic capacity; and a high voltage is produced to provide an electron lens, though enabling the electron lens to improve its performance without being obstructed by requirements associated with the construction of a picture tube.

REFERENCES:
patent: 2559526 (1951-07-01), Van de Graaff et al.
patent: 3417199 (1968-12-01), Yoshida et al.
patent: 3772554 (1973-11-01), Hughes
patent: 3932786 (1976-01-01), Campbell

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