Electron gun having a distributed electrostatic lens

Details Electron gun having a distributed electrostatic lens Electron gun having a distributed electrostatic lens

1977-06-06

1978-11-07

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

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

313414, 313449, H01J 2946, H01J 2956

Patent

active

041248104

ABSTRACT:
A color cathode ray tube includes an electron gun having a distributed lens system which yields smaller spot sizes on a phosphor screen at intermediate and higher cathode currents when compared with prior art electrostatic lenses having similar diameters. The lens establishes an essentially exponentially increasing potential distribution along the electron beam path.

REFERENCES:
patent: 3417199 (1968-12-01), Yoshida et al.
patent: 3517242 (1970-06-01), Pappadis
patent: 3740607 (1973-06-01), Silzars et al.
patent: 3889146 (1975-06-01), Koizumi et al.
patent: 3890528 (1975-06-01), Say et al.
patent: 3932786 (1976-01-01), Campbell

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