Electron gun with focusing electrode having a curved surface

Details Electron gun with focusing electrode having a curved surface Electron gun with focusing electrode having a curved surface

1996-07-10

1999-08-17

O'Shea, Sandra

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313414, H01J 2951, H01J 2958

Patent

active

059398205

ABSTRACT:
An electron gun for a color cathode ray tube includes a cathode, a triode portion having control and accelerating electrodes, a pre-focus lens formed by a first accelerating/focusing electrode, a second accelerating/focusing electrode, and a third accelerating/focusing electrode, and a main lens formed by the third accelerating/focusing electrode and a fourth accelerating/focusing electrode, wherein outer lens elements of the pre-focus lens and the main lens are inclined so as to prevent formation of halos.

REFERENCES:
patent: 3772554 (1973-11-01), Hughes
patent: 4310780 (1982-01-01), Sakurai et al.
patent: 4701678 (1987-10-01), Blacker et al.
patent: 4731563 (1988-03-01), Bloom et al.
patent: 4940917 (1990-07-01), Stil
patent: 5038073 (1991-08-01), Son
patent: 5170101 (1992-12-01), Gorski et al.
patent: 5198719 (1993-03-01), Koh

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