Color cathode ray tube apparatus

A color cathode ray tube apparatus comprising:

• a vacuum envelope including
• a panel section having an axis, the panel section including:
• a faceplate having an inner surface, and
• a skirt extending from a peripheral edge of said faceplate,
• a funnel section which enlarges into and connected to the panel section, and
• a neck section continuous with the funnel section and having a substantially cylindrical shape;
• a phosphor screen formed on the inner surface of said faceplate;
• a shadow mask arranged in said panel section for disposing said phosphor screen against said faceplate;
• an in-line electron gun assembly including
• an electron beam forming section for generating, controlling, and accelerating three electron beams and
• a main electron lens section for converging and focusing the three electron beams onto said phosphor screen;
• and
• a deflecting unit for deflecting the three electron beams in vertical and in horizontal directions, the deflecting unit including
• a main deflecting section, whose deflecting center is located towards said phosphor screen relative to an optimal deflecting center of said color cathode ray tube, the main deflecting section having
• a first horizontally deflecting coil for generating a magnetic field for deflecting the three beams in the horizontal direction and
• a first vertically deflecting coil for generating a magnetic field for deflecting the three beams in the vertical direction and
• at least one sub deflecting section whose deflecting center is located towards the electron gun assembly relative to the optimal deflecting center of said color cathode ray tube, the sub deflecting section having
• a second horizontally deflecting coil for generating a magnetic field for deflecting the three beams in the horizontal direction and
• a second vertically deflecting coil for generating a magnetic field for deflecting the three beams in the vertical direction
• wherein at least one of the second horizontally deflecting coil and the second vertically deflecting coil generates an asymmetric magnetic field, and when only the second horizontally deflecting coil generates an asymmetric magnetic field, the magnetic field generated thereby is asymmetric with respect to a vertical axis, and when only the second vertically deflecting coil generates an asymmetric magnetic field, the magnetic field generated thereby is asymmetric with respect to a horizontal axis, and when each of the second horizontally deflecting coil and the second vertically deflecting coil generates an asymmetric magnetic field, the magnetic field generated by the second horizontally deflecting coil is asymmetric with respect to the vertical axis and the magnetic field generated by the second vertically deflecting coil is asymmetric with respect to the horizontal axis.