Electron gun for color picture tube

Details Electron gun for color picture tube Electron gun for color picture tube

1983-12-05

1986-09-30

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313449, 313460, H01J 2950, H01J 2956

Patent

active

046148949

ABSTRACT:
An electron gun of in-line type for color picture tube including a pair of electrodes for an electrostatic focusing lens is disclosed. Each of the pair of electrodes has three electron beam passing holes arranged in line. Each of the electron beam passing holes is so shaped that the maximum dimension in the direction in which the electron beam passing holes are arranged in line is smaller than that in the direction perpendicular to the first-mentioned direction, and that the maximum dimension in the latter direction is larger than the center-to-center spacing between the electron beam passing holes. At least part of the electrode surfaces including the opening edges of the three electron beam passing holes is a curved surface, so that the distance between the surfaces of the pair of opposite electrodes is made different in value along each opening edge.

REFERENCES:
patent: 3873879 (1975-03-01), Hughes
patent: 3984723 (1976-10-01), Gross et al.
patent: 4288718 (1981-09-01), Blacker et al.
patent: 4370592 (1983-01-01), Hughes et al.

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