In-line type electron gun for a color cathode ray tube

Details In-line type electron gun for a color cathode ray tube In-line type electron gun for a color cathode ray tube

1990-11-06

1992-08-25

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

H01J 2962

Patent

active

051421895

ABSTRACT:
An in-line type electron gun used in a color cathode ray tube apparatus, the electron gun comprising a focusing grid, a final accelerating grid adjacent to the focusing grid, these grids having elongated cylindrical apertures having their majors extending horizontally, a field correction metal plate located in each grid along the elongated aperture, the field correction metal plate having three apertures produced in an in-line arrangement, wherein the central aperture is elongated with a major extending vertically, and the two apertures on each side are circular, the horizontal diameter L.sub.s and the vertical diameter .phi..sub.v having a ratio .phi..sub.v /L.sub.s of 0.49 to 0.6.

REFERENCES:
patent: 4542318 (1985-09-01), Say
patent: 4622491 (1986-11-01), Izumida et al.

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