Color display tube having electrode converging means

Details Color display tube having electrode converging means Color display tube having electrode converging means

1988-09-27

1989-12-26

Wieder, Kenneth

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313413, 313414, 313428, 313447, H01J 2951, H01J 2954, H01J 2962, H01J 2970

Patent

active

048900320

ABSTRACT:
A color display tube having an electron gun system for producing three in-line electron beams. The system includes, in the direction of travel of the beams, a first electrode, a second electrode and a plurality of focusing electrodes, each having apertures for passing the beams. The second electrode includes two spaced-apart plate-shaped members, each having a central and two outer apertures for passing the beams. The apertures in the members for each outer beam are laterally shifted with respect to each other and with respect to a corresponding aperture in the first electrode to direct the outer beams toward convergence with the inner beam.

REFERENCES:
patent: 2957106 (1960-10-01), Moodey
patent: 3628077 (1971-12-01), Bossers
patent: 3875446 (1975-04-01), Miyaoka
patent: 3919583 (1975-11-01), Hasker et al.
patent: 4234814 (1980-11-01), Chen et al.
patent: 4291251 (1981-09-01), Bijma et al.
patent: 4337409 (1982-06-01), van der Heijen et al.

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