Electron gun for dynamic beam shape modulation

Details Electron gun for dynamic beam shape modulation Electron gun for dynamic beam shape modulation

1981-09-23

1984-04-17

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313444, 313449, 313460, H01J 2951, H01J 2952

Patent

active

044437366

ABSTRACT:
In an electron gun that includes a cathode, a control grid, a screen grid and at least two main focus lens electrodes, an improvement comprises the screen grid including a first portion having a circular aperture, a second portion having at least one elongated aperture and a third portion having a circular aperture. The first and third portions are electrically insulated from the second portion.

REFERENCES:
patent: Re25127 (1962-02-01), Szegho
patent: 2859378 (1958-11-01), Gundert et al.
patent: 4218634 (1980-08-01), Takenaka
patent: 4234814 (1980-11-01), Chen et al.
patent: 4319163 (1982-03-01), Chen

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