A shadow mask for a color cathode ray tube having a hole arranged in a variable arrangement pitch that is not monotonously reduced and a color cathode ray tube

摘要

A glass envelope having a panel portion, a neck portion, and a panel portion connecting the panel portion and the neck portion to each other; an electron gun mounted on the neck portion to generate an electron beam; Wherein the through hole of the shadow mask is disposed at a position on the shadow mask in a vertical direction of the color cathode ray tube, and the horizontal direction of the color cathode ray tube Direction, they are arranged in a variable arrangement pitch that is not generally monotonically reduced from the center of the bird to two opposing peripheral portions. The rate of increase of the variable arrangement pitch in the horizontal direction is substantially 0 in the first region from the central portion of the shade to the middle portion between the central portion and the two opposing peripheral portions, And has a gradient greater than zero in the second region to the periphery.