Patent ID: 6635981
Filing Date: 2003-10-21
Classification: H01J

Abstract:
A color cathode ray tube comprising:a vacuum envelope including a panel having a major axis and a minor axis perpendicular to each other; a phosphor screen located on the inner surface of the panel; an electron gun assembly for emitting electron beams toward the phosphor screen; and a color sorting mechanism opposed to the phosphor screen, the color sorting mechanism including a mask body, having a rectangular effective portion with a large number of electron beam holes, and a mask frame fixedly fitted with the mask body, the mask frame including a sidewall portion, composed of a pair of long sidewalls extending parallel to the major axis and opposed to each other, a pair of short sidewalls extending parallel to the minor axis and opposed to each other, and corner sidewalls between the long and short sidewalls, and a base portion extending from the sidewall portion toward a tube axis, the base portion having substantially straight beads located near the corner sidewalls and connecting the long and short sidewalls.