Color picture tube with internal funnel shaped magnetic shield

Details Color picture tube with internal funnel shaped magnetic shield Color picture tube with internal funnel shaped magnetic shield

1978-06-27

1980-10-21

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313479, 315 85, H01J 2906

Patent

active

042296757

ABSTRACT:
An in-line stripe type color picture tube comprises an inner magnetic shield member having sufficient shield effect against both individual vertical and horizontal components of the earth magnetism and composite components as well. The inner magnetic shield member prevents unwanted shifts of electron beams to ensure that the positional relationship between a fluorescent screen and landing electron beams may have sufficient tolerances and color blur on the fluorescent screen may be prevented.

REFERENCES:
patent: 3564329 (1971-02-01), Vetz
patent: 3867668 (1975-02-01), Shrader
patent: 4019085 (1977-04-01), Sakata

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