Patent ID: 6307311
Filing Date: 2001-10-23
Classification: H01J

Abstract:
A color cathode ray tube including a shadow mask structure in which a skirt portion of a shadow mask is fixedly secured to a support frame, wherein the shadow mask structure comprises a generally rectangular shadow mask formed by an apertured portion having a plurality of electron beam transmission apertures, an imperforate portion disposed around the entire periphery of the apertured portion, and a skirt portion being bent back and drooping from the entire periphery of the imperforate portion, and a support frame including a rectangular frame portion, the skirt portion of the shadow mask being fixedly secured to the inside of the rectangular frame portion, and wherein a bent portion of the shadow mask which defines a transitional region between the imperforate portion and the skirt portion of the shadow mask is formed in a shape where long sides thereof are recessed inwardly, and a radius of curvature of the recessed shape at the bent portion of the shadow mask of the long side of the shadow mask is equal to or more than 20000 mm, and ends of the long sides of the skirt portion come into contact with the frame portion.