Color cathode ray tube

Abstract

Color cathode ray tube including a panel having a substantially flat outside surface and an inside surface with a curvature, and a shadow mask at rear of the panel formed to have a curvature, wherein, when Rxp denotes a radius of curvature of the inside surface of the panel in a long axis direction, Ryp denotes a radius of curvature of the inside surface of the panel in a short axis direction, Rdm denotes a radius of curvature of the shadow mask in a diagonal axis direction, and ‘W’ denotes a ratio of a thickness of an end portion of an effective surface of the panel to a thickness of a center portion of the panel, the radius Rxp of curvature of the inside surface of the panel in the long axis direction, and the radius Ryp of curvature of the inside surface of the panel in the short axis direction can be respectively expressed as follows; Rxp=(A·W+B)·Rdm(A=−0.217, 1.607<B<2.446) Ryp=(C·W+D)·Rdm(C=−0.074, 0.799<D<1.227), thereby improving structural strength.

Dependencies are inferred from the claim text.