Cathode-ray tube having a magnetic quadrupole shadow mask

Details Cathode-ray tube having a magnetic quadrupole shadow mask Cathode-ray tube having a magnetic quadrupole shadow mask

1980-03-31

1982-07-13

Lieberman, Eli

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313408, H01J 2907, H01J 3120

Patent

active

043396887

ABSTRACT:
A cathode ray tube for displaying colored pictures of the post-focusing type. The color selection means are formed by a plate which is provided with a large number of apertures, which plate is provided on one side with a first plate of parallel strips of hard magnetic material provided between the rows of apertures. The color selection means are magnetized in a direction perpendicular to the plane of the plate so that a magnetic quadrupole is obtained in each aperture.

REFERENCES:
patent: 4135111 (1979-01-01), Verweel

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