Electron gun having spacer placed between first and second elect

Details Electron gun having spacer placed between first and second elect Electron gun having spacer placed between first and second elect

1997-05-27

1999-04-06

Patel, Vip

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313446, 313243, 313250, H01J 2950

Patent

active

058923225

ABSTRACT:
An electron gun without deviation of diameter between grids, having a good object point diameter shape, and having a high cut-off voltage, which is cheap and has high performance, and a cathode ray tube provided with the same. The electron gun is provided with a spacer of a columnar shape which has surfaces facing each other on its two end surfaces, a beam aperture penetrating the spacer between the end surfaces, and conductive films provided on the two end surfaces, in which at least the circumferential wall of the beam aperture is constituted by a high resistance conductive material, the conductive films being used to constitute the grids and the beam aperture being constituted as an aperture for an electron beam.

REFERENCES:
patent: 4720654 (1988-01-01), Hernqvist et al.
patent: 5424606 (1995-06-01), Karasawa et al.
patent: 5479067 (1995-12-01), Wilk et al.

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