Color display tube having a magnetic sheild with a reduced magne

Details Color display tube having a magnetic sheild with a reduced magne Color display tube having a magnetic sheild with a reduced magne

1994-10-19

1996-09-17

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313479, H01J 2906

Patent

active

055571611

ABSTRACT:
Color display tube of the 3-in-line type having a display screen with a pattern of phosphor rows. The display tube has a shield with two long walls, two short walls and one gun-sided aperture. Viewed at least in projection, at least one area having a decreased magnetic permeability and extending in the longitudinal direction of the tube between the edges of the wall and the aperture is present in the material of each long wall.

REFERENCES:
patent: 4229675 (1980-10-01), Matsuki et al.
patent: 4758193 (1988-07-01), Brown
patent: 4792317 (1988-12-01), Sipsma
patent: 5029256 (1991-07-01), Tokita et al.
patent: 5412276 (1995-05-01), Van Mensvoort

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