Color cathode ray tube

Details Color cathode ray tube Color cathode ray tube

1988-08-24

1989-11-14

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313477R, H01J 2981, H01J 2986

Patent

active

048810045

ABSTRACT:
In a color cathode ray tube, a shadow mask and/or a panel is formed into the following shape. In the shadow mask and/or the panel, a radius of curvature at a central portion in a section taken along an X-Z parallel plane is larger than that at an effective diameter edge portion on the Y axis, and a radius of curvature at an effective diameter edge portion on the X axis is smaller than that at a diagonal effective diameter edge portion. In the panel, a difference between a thickness at an effective diameter edge portion and a thickness on the X axis in a section of the panel taken along a Y-Z parallel plane is maximum at a position between the center of the panel and the effective diameter edge portion on the X axis.

REFERENCES:
patent: 4677339 (1987-06-01), Inoue et al.
patent: 4697119 (1987-09-01), Inoue et al.

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