Color picture tube apparatus

摘要

A CPU (10) for adjusting color purity and color displacement at the center of a screen is provided on an outer circumferential surface of a neck portion (3a). BVM coils (20) for modulating a scanning velocity in a horizontal direction of electron beams are provided at a position where they are overlapped with the CPU (10) in a tube-axis direction. Aring-shaped ferrite core (70) is provided at a position where it is overlapped with the BVM coils (20) in the tube axis direction. Two surfaces vertical to a tube axis of the ring-shaped ferrite core (70) are covered with resin layers. Because of this, the ring-shaped ferrite core (70) can be prevented from being cracked. <IMAGE>