Electron gun for a color cathode ray tube

Details Electron gun for a color cathode ray tube Electron gun for a color cathode ray tube

1992-05-08

1994-04-05

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313449, 313412, 315382, H01J 2950

Patent

active

053008553

ABSTRACT:
An electron gun for a color cathode ray tube is formed such that parallel vertical blades are extending toward cathodes formed at both edges of each electron beam passing hole in the outgoing plate of a focus electrode. Horizontal blades extending toward the cathodes at a predetermined length are formed at the edges of the top and bottom portions of electron beam passing holes in the incoming plate of a dynamic focus electrode. Thus, the horizontal blades are inserted into the electron beam passing holes of the focus electrode, which reduces astigmatism due to deflection aberration and improves the focusing characteristics.

REFERENCES:
patent: 4086513 (1978-04-01), Evans, Jr.
patent: 4731563 (1988-03-01), Bloom et al.
patent: 4772827 (1988-09-01), Osakabe
patent: 5025189 (1991-06-01), Son
patent: 5061881 (1991-10-01), Suzuki et al.

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