Color cathode ray tube

Abstract

A color cathode ray tube in which beam landing errors caused by non-uniform thermal expansion of a shadow mask and the terrestrial magnetism are corrected is provided such that color purity is improved. The color cathode ray tube in accordance with the present invention comprises a panel having a phosphor screen formed on an inner surface thereof, a shadow mask having a faceplate portion and a peripheral skirt portion bent back from the faceplate portion and a frame joined to the skirt portion of the shadow mask is provided, wherein height of the skirt portion at a long side of the faceplate portion is different from height of the skirt portion at a short side of the faceplate portion, and a plurality of holes are perforated at the skirt portion of a short side of the faceplate portion.

Dependencies are inferred from the claim text.