Plural beam electron gun assembly

Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control

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Details

313409, H01J 2950, H01J 2951

Patent

active

040285812

ABSTRACT:
A cathode ray tube plural-beam-in-line bi-potential electron gun assembly, having applied beam currents of differing levels, manifests structurally modified gun structures to effect focused beam landings at the screen that are evidenced as substantially equi-sized spots thereby providing improved resolution and brightness of the screen imagery. The structural changes embody modifications of the related focusing and accelerator electrodes of the respective guns to provide a partial telescoping arrangement for effecting the discrete placement, forming and shielding of the final focusing lenses. The three lenses so formed are in different planes in partial overlapping axial relationship.

REFERENCES:
patent: 3294999 (1966-12-01), Van Hekken
patent: 3619686 (1971-11-01), Miyaoka
patent: 3755703 (1973-08-01), Ueno et al.
patent: 3883771 (1975-05-01), Ohgoshi et al.
patent: 3906279 (1975-09-01), Linssen

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