Patent ID: 6825603
Filing Date: 2004-11-30
Classification: H01J

Abstract:
A cathode ray tube having a deflection yoke, comprising:a horizontal deflection coil for deflecting an electron beam emitted from an electron gun in a horizontal direction; a vertical deflection coil for deflecting the electron beam in a vertical direction; a ferrite core for preventing a loss of a magnetic force generated from the horizontal deflection coil and the vertical deflection coil while improving a magnetic efficiency; and a holder for fixing the horizontal deflection coil, the vertical deflection coil and the ferrite core at predetermined locations and forming insulation in between the horizontal deflection coil and the vertical deflection coil, wherein each cross-section of the horizontal deflection coil and the vertical deflection coil has a rectangular shape, and a cross-section of the ferrite core has a circular shape, and the distance from the outer part of the holder to the inner surface of the vertical deflection coil on the vertical axis satisfies a relationship of 0where a distance from an outer part of the holder to an inner surface of the ferrite core on a vertical axis of a cross-section of the deflection yoke taken along a plane parallel to a panel from an opening end of the ferrite core is defined as Y, a distance from the outer part of the holder to the inner surface of the vertical deflection coil on the vertical axis is defined as X, and a thickness of the vertical deflection coil on the vertical axis is defined as Z.