Patent ID: 6590327
Filing Date: 2003-07-08
Classification: H01J

Abstract:
A color cathode ray tube comprising:a panel in which an outside surface has a curved surface that is substantially flat with an equivalent radius of curvature on a diagonal axis being greater than or equal to 10,000 mm and an inside surface has a curved surface that is convex toward the outside surface; and a shadow mask provided so as to be opposed to the inside surface of the panel, the shadow mask being generally rectangular and having radii of curvature along a diagonal axis, such that the radius of curvature decreases approximately linearly between a center of the shadow mask and a periphery along the diagonal axis, and where a relationship between radii of curvature and corresponding distances from the center of the shadow mask on the diagonal axis is approximated by a first linear expression according to the least-squares method, differences between the radii of curvature and results of the linear expression are smaller than or equal to 100 mm.