Color picture tube device

Details Color picture tube device Color picture tube device

1985-05-08

1987-04-07

Levy, Stewart J.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313413, H01J 2951

Patent

active

046563903

ABSTRACT:
In an in-line type color picture tube device, a deflection yoke is arranged around the neck and funnel sections and the deflection yoke comprises saddle coils for generating a horizontal deflection magnetic field and troidal coil for generating a vertical deflection magnetic field. First and second annular magnetic field control elements of a magnetic material with a high permeability are located between the deflection yoke and the cathodes of an electron gun assembly to surround the beam paths of center and side beams emitted from the cathodes. The second element is arranged closer to the cathode than the first elements.

REFERENCES:
patent: Re29895 (1979-01-01), Murata et al.
patent: 3860850 (1975-01-01), Takenaka et al.
patent: 4142131 (1979-02-01), Ando et al.
patent: 4196370 (1980-04-01), Hughes
patent: 4225804 (1980-09-01), Bekaert et al.
patent: 4415831 (1983-11-01), Konosu
patent: 4547698 (1985-10-01), Gioia et al.
patent: 4556819 (1985-12-01), Chen et al.
Patents Abstracts of Japan, JP-B-58 007 017, FIGS. 2, 4, 8, 10.

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