Patent ID: 6552482
Filing Date: 2003-04-22
Classification: H01J

Abstract:
A color cathode ray tube comprising:an envelope including a rectangular 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 which emits 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 skirt portion bent from the periphery of the effective portion and extending along a tube axis perpendicular to the major and minor axes, and a mask frame having an inner wall fixedly fitted with the skirt portion of the mask body, the skirt portion including cut portions, the width of the cut portions along the minor or major axis ranging from 0.10Ã—L to 0.45Ã—L, where L is the distance from an end of the minor or major axis to a diagonal end, and the height of the cut portions along the tube axis being equal to 5% to 40% of the height of the skirt portion along the tube axis in a region near the minor or major axis.