Patent ID: 6914505

Claim:
A deflection yoke provided on an external surface of an evacuated envelope of a cathode ray tube, comprising: a tube-shaped core that is made of a magnetic material, and has, on an inner wall thereof, a plurality of ridges each of which extends along a tube axis direction of the cathode ray tube, the plurality of ridges being arranged circumferentially at predetermined intervals and thereby forming a plurality of slots; a vertical deflection coil that is wound so that part of its length is disposed in one or more of the slots of the core; and a horizontal deflection coil that is wound so that part of its length is disposed in one or more of the slots of the core, wherein the slots include (a) first slots in which one of the horizontal deflection coil and the vertical deflection coil is disposed and (b) second slots in which both of the horizontal deflection coil and the vertical deflection coil are disposed, and a bottom of each first slot is, for part or all of a length of the slot, closer to the external surface of the evacuated envelope than a bottom of each second slot is.