Deflection device for use in color television receiver

Claim 1

In a deflection device for use in a color television receiver, which is fitted to a neck portion of a color picture tube having electron guns emitting three electron beams, said electron guns being arranged in a horizontal plane and which comprises a deflection yoke for horizontally and vertically deflecting said three electron beams on a screen and at least a soft magnetic material piece fitted on said deflection yoke, the improvement which comprises a deflection yoke which is so designed as to eliminate mis-convergences MC 1 , MC 2 , MC 3 , MC 4 and MC 7 , in the mis-convergence MC 1 the three electron beams being horizontally displaced from each other at both the upper and lower end portions of the vertical or Y axis, in the mis-convergence MC 2 , the three electron beams being vertically displaced from each other at both the upper and lower end portions of the Y axis, in the mis-convergence MC 3 , the three electron beams being horizontally displaced from each other at both the right and left end portions of the horizontal or X axis, in the mis-convergence MC 4 three electron beams being vertically displaced from each other at both the right and left end portions of the X axis, and in the mis-convergence MC 7 scanning lines of the three electron beams being vertically displaced at intermediate portions between the Y axis and each of said right and left ends of the screen; and at least a soft magnetic material piece fitted to an end portion of said deflection yoke nearer to the screen of the color picture tube so as only to eliminate a mis-convergence MC 5 wherein the three electron beams are horizontally displaced from each other at the diagonal end portions of the screen and a mis-convergence MC 6 wherein the three electron beams are vertically displaced from each other at the diagonal end portions of the screen.