Electron gun assembly for use in multi-beam type cathode ray tub

Details Electron gun assembly for use in multi-beam type cathode ray tub Electron gun assembly for use in multi-beam type cathode ray tub

1974-08-05

1976-02-03

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313417, H01J 2950, H01J 2951, H01J 2982

Patent

active

039366928

ABSTRACT:
In an electron gun assembly for use in multi-beam type cathode ray tube of the type including a plurality of grid structures in which the groups of the grid electrodes of respective guns are formed as integral units, the grid electrodes of each group are impressed with the same potential and perform the same function, and wherein an electron lens is formed between adjacent grid structures, an assembly of a plate member or a superposed plate member is secured to one or both of the opposing ends of the grid structures. Each plate member is provided with a plurality of openings which are arranged to correspond to a predetermined arrangement of a plurality of electron guns, and each opening is surrounded by an axial edge. The edges function to prevent electric fields formed by the openings from being affected by the side walls of the grid structures opposing the openings thereby decreasing the astigmatism of the main electron lens.

REFERENCES:
patent: 3772554 (1973-11-01), Hughes

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