Dynamic focus electron gun

Details Dynamic focus electron gun Dynamic focus electron gun

1990-01-16

1991-11-05

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

H01J 2958

Patent

active

050633260

ABSTRACT:
A dynamic focus electron gun includes a triode for initially forming electron beams and a main lens for focusing and accelerating the electron beams with dynamic electric fields, wherein the main lens includes an auxiliary electrode including three cylindrical members, each including an electric field introducing window aperture for introducing electric fields into the members and an oblong tubular electrode commonly surrounding the members and covering the electric field introducing windows. According to the present invention, interference between the electron beams can be avoided, and the focus of the electron beams can be optimized.

REFERENCES:
patent: 4366419 (1982-12-01), Barten
patent: 4886999 (1989-12-01), Yamane et al.

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