Color cathode ray tube

Details Color cathode ray tube Color cathode ray tube

2005-06-21

2005-06-21

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

C313S408000

Reexamination Certificate

active

06909227

ABSTRACT:
The present invention provides a color cathode ray tube having a shadow mask for selecting colors, wherein the shadow mask satisfies the relation:5.5<Rh(H2)<8.0,where Rh is a mean curvature radius in the direction of the long axis of the shadow mask, H is a distance between both ends in a direction of a long axis of an effective surface of the shadow mask, and a mean curvature radius in the direction of the long axis satisfies the condition:Rh=(H2)2+Zh22*Zhwhere Zh is a recess amount in a direction of a tube axis at an end of the long axis of the effective surface with respect to a center of the effective surface.

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patent: 6229255 (2001-05-01), Kim et al.
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patent: 6650036 (2003-11-01), Nakagawa et al.
patent: 6674225 (2004-01-01), Jung

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