Patent ID: 6803713
Filing Date: 2004-10-12
Classification: H01J

Abstract:
A color cathode ray tube comprising:a panel provided with a phosphor screen; an electron gun for emitting an electron beam toward the phosphor screen; and a shadow mask assembly located between the phosphor screen and the electron gun, the shadow mask assembly including a shadow mask body having a rectangular effective portion opposed to the phosphor screen and formed having a large number of electron beam passage apertures, the effective portion having a major axis and a minor axis passing through the center thereof and extending at right angles to each other, a mask frame to which the periphery of the shadow mask body is fixed, and an auxiliary mask in the form of a strip extending in the direction of the minor axis, fixed to a region having a width within &frac13; of the length of the shadow mask body in the direction of the major axis and situated in a longitudinal central region of the effective portion containing the minor axis, and having a number of electron beam passage apertures communicating individually with the electron beam passage apertures of the effective portion.