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

1996-06-10

1998-05-12

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313412, 313425, 313426, H01J 2956

Patent

active

057511004

ABSTRACT:
An electron gun for a color cathode ray tube taking a multi-level focusing form includes a focusing electrode and a pre-focusing electrode. The distances between the centers of the apertures of the focusing electrode are larger than the distances between the corresponding apertures of the pre-focusing electrode. The electron gun further includes a post-focusing electrode. The distances between the centers of the apertures of the focusing electrode are larger than those of the corresponding apertures of the post-focusing electrode. But, the center distances between the apertures of the pre-focusing electrode are equal to the center distances between the corresponding apertures of the post-focusing electrode. The post-focusing electrode is partitioned from the focusing electrode.

REFERENCES:
patent: 4728859 (1988-03-01), Natsuhara et al.
patent: 5081393 (1992-01-01), Kinami

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