Electron gun for use in color cathode ray tube having a pluralit

Details Electron gun for use in color cathode ray tube having a pluralit Electron gun for use in color cathode ray tube having a pluralit

1988-06-16

1990-12-18

Wider, Kenneth

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313449, 313458, 313456, H01J 2962, H01J 2982

Patent

active

049788868

ABSTRACT:
At least one of grid electrodes which serves as a main lens of an electron gun for use in a color cathode ray tube is divided into a plurality of cylindrical electrodes coaxially connected. An inner electrode is provided at the connection part between the cylindrical electrodes so that the center of an elliptical aperture of the inner electrode coincides with the center of an inner wall of the grid electrode. Thus, astigmatism in the main lens is removed, thereby improving the resolution of the color cathode ray tube.

REFERENCES:
patent: 4032811 (1977-06-01), Schwartz et al.
patent: 4181870 (1980-01-01), Stevens
patent: 4800318 (1989-01-01), Naiki

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