Patent ID: 7038368

Claim:
A color picture tube apparatus comprising: a panel with a phosphor screen formed on an inner surface; a funnel connected to the panel; an in-line type electron gun in a neck portion of the funnel; a deflection yoke provided on an outer circumferential surface of the funnel; and a convergence and purity unit having a pair of quadrupole magnets provided on an outer circumferential surface of the neck portion, wherein the deflection yoke includes a horizontal deflection coil, a vertical deflection coil, and an insulating frame provided between the horizontal deflection coil and the vertical deflection coil, the insulating frame has an end plate vertical to a tube axis, provided between the horizontal deflection coil and the convergence and purity unit, and a pair of bar-shaped magnets each having magnetic poles on both sides in a major axis direction sandwich the neck portion substantially in an in-line direction and are provided so that identical poles are opposed to each other, between the end plate and the convergence and purity unit at a distance from the end plate, wherein a position of the pair of bar-shaped magnets in the tube axis direction is placed further on the convergence and purity unit side with respect to a position where an intensity on the tube axis of a horizontal deflection magnetic field generated by the horizontal deflection coil has a maximum value M Hmax , and in a region where the intensity on the tube axis of the horizontal deflection magnetic field is 25% or less of the maximum value M Hmax .