Electron gun and cathode-ray tube comprising the same

Details Electron gun and cathode-ray tube comprising the same Electron gun and cathode-ray tube comprising the same

1993-11-22

1995-10-24

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313449, 313460, H01J 2950

Patent

active

054612780

ABSTRACT:
In an electron gun wherein an electric field which is established between the axially opposed parts of a pair of electrodes forming a main lens has a rotationally-asymmetric distribution; electric-field correcting plates (54, 65 in FIG. 1B) are provided in the respective electrodes (5, 6) so as to render a lens action on electron beams substantially rotationally symmetric. The electron beams form smaller spots on the fluorescent screen of a cathode-ray tube than in the prior art.

REFERENCES:
patent: 4581560 (1986-04-01), Shirai et al.
patent: 4678964 (1987-07-01), Peels
patent: 4833364 (1989-05-01), Izumida et al.
patent: 5034652 (1991-07-01), Shimona et al.

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