Cathode ray tube focusing electrode shielding means

Details Cathode ray tube focusing electrode shielding means Cathode ray tube focusing electrode shielding means

1982-09-27

1985-10-08

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313409, H01J 2958

Patent

active

045462879

ABSTRACT:
The invention relates to incorporating improved beam shielding means into the unitized focusing electrode structure of a plural beam in-line color cathode ray tube electron gun assembly. At least a portion of the G3 electrode structure is fabricated of a magnetic alloy material. Positioned forward and adjacent to the magnetic portion is an apertured planar shielding means also fabricated of magnetic material. The cooperation of these adjoining magnetic areas provides significant shielding of the beams from the deleterious back-field of the deflection yoke.

REFERENCES:
patent: 4310780 (1982-01-01), Sakurai et al.
patent: 4362964 (1982-12-01), Sakurai et al.
patent: 4370593 (1983-01-01), Sweigart et al.
patent: 4439710 (1984-03-01), Osakabe et al.

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