Color display tube having an internal magnetic shield

Details Color display tube having an internal magnetic shield Color display tube having an internal magnetic shield

1993-03-22

1995-05-02

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313479, H01J 2906

Patent

active

054122767

ABSTRACT:
Color display tube of the 3-in-line type having a display screen with a pattern of phosphor lines. The display tube has an internal shield with two long walls and two short walls. Each long wall is provided with at least one slit extending in the longitudinal direction of the tube and being remote from the edges of the walls, while for locally increasing the magnetic resistance the shield is particularly provided with a short transverse slit between at least one slit end and an edge of the shield.

REFERENCES:
patent: 4229675 (1980-10-01), Matsuki et al.
patent: 4580076 (1986-04-01), Shimoma et al.
patent: 4622490 (1986-11-01), Bonway
patent: 4758193 (1988-07-01), Brown

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