Color cathode ray tube

Details Color cathode ray tube Color cathode ray tube

1997-03-10

2000-08-15

Patel, Ashok

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313407, 313404, H01J 2907

Patent

active

061041327

ABSTRACT:
A color cathode ray tube comprises a vacuum envelope in which there is mounted a shadow mask having a curved surface having a plurality of electron beam passing holes and a skirt extending downward from the margin of the curved surface. The shadow mask is supported by a mask frame having a substantially rectangular side wall. A shadow mask assembly constituted by fitting and securing the skirt into the side wall is set in the panel of the envelope, and the skirt is fitted and secured into the side wall by curving the middles of two or four facing sides of the skirt inward. Thereby, it is possible to provide a color cathode ray tube having the shadow mask assembly capable of obtaining a superior magnetic shielding characteristic by enlarging the effective region of the curved surface of the shadow mask.

REFERENCES:
patent: 4056755 (1977-11-01), Sohn
patent: 4286189 (1981-08-01), Koizumi et al.
patent: 4308485 (1981-12-01), Ignazio
patent: 4645968 (1987-02-01), Ragland et al.
patent: 4743371 (1988-05-01), Bauder
patent: 4748371 (1988-05-01), Bauder
patent: 5315208 (1994-05-01), Van Der Bolt

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