Patent ID: 7202593

Claim:
A color cathode ray tube, comprising an inner magnetic shield, wherein: the inner magnetic shield has a substantially truncated pyramidal body having a pair of short side members of a screen and a pair of long side members of a screen, and constructed such that said short side members are joined to said long side members at edge portions of the substantially truncated pyramidal magnetic shield; the inner magnetic shield is made of a steel sheet, a ratio of an anhysteretic magnetic permeability of the steel sheet in a rolling direction to an anhysteretic magnetic permeability of the steel sheet in a transversal direction being not higher than 0.5 or not lower than 2.0, and a higher value of the two anhysteretic magnetic permeability values in the rolling direction and in the transversal direction being not lower than 18000; and the direction, in which the anhysteretic magnetic permeability of the steel sheet is said higher value, corresponds to the horizontal plane direction of said short side member.