Cathode-ray tube for displaying coloured pictures

Details Cathode-ray tube for displaying coloured pictures Cathode-ray tube for displaying coloured pictures

H - Electricity

01

J

313/35.16

H01J 29/07 (2006.01) H01J 29/81 (2006.01)

Patent

CA 1135771

1.1.1980 1 PHN 9438 ABSTRACT: Cathode ray tube for displaying coloured pictures. A cathode ray tube for displaying coloured pictures of the post-focusing type. The colour 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 of parallel strips of hard magnetic material provided between the rows of apertures. The colour selection means are magnetized in a direction perpendicular to the plane of the plate so that a magnetic quadrupole is obtained in each aperture.

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