Electron gun for color picture tube

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

1983-01-31

1985-02-05

Demeo, Palmer

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

H01J 2950, H01J 2956

Patent

active

044980264

ABSTRACT:
An electron gun for a color picture tube comprises opposing cup-shaped electrodes each having a plurality of openings laterally aligned in a row, the electrodes being combined such that the openings face each other to form electron lenses. The openings are formed in flat bottom walls of said electrodes, a width of a bridge portion between adjacent openings is 0.5 to 1.5 times a thickness of the bottom wall of each electrode, and corrective plate electrodes are arranged to oppose bridge portions with a predetermined distance therefrom. The electrodes are combined such that spherical aberration of said electron lenses as a whole can be reduced when one of the electrodes is applied with a voltage which is higher than that applied to the other.

REFERENCES:
patent: 4374342 (1983-02-01), Say

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