Patent ID: 6894430
Filing Date: 2005-05-17
Classification: H01J

Abstract:
1. A color cathode-ray tube comprising a panel having a fluorescent screen, Red, Green, and Blue fluorescent substances being applied to an inner surface of the panel, a funnel coupled to a rear surface of the panel for maintaining an inside thereof in a vacuum state, an electron gun installed inside of a pipe-shaped neck section disposed at a rear side of the funnel for emitting electron beams, and a deflection yoke for horizontally or vertically deflecting the electron beams, wherein the deflection yoke comprises: a horizontal deflection coil and a vertical deflection coil for deflecting electron beams emitted from the electron gun in the horizontal or vertical direction; a ferrite core for enhancing a magnetic efficiency by minimizing a loss in a magnetic force generated by the horizontal and vertical deflection coils, wherein a sectional configuration on a screen side of the horizontal or vertical deflection coils has a substantially rectangular shape, and a shape of the ferrite core is either circular or elliptical, and an outer surface dimension size (HS) of a flange section of the horizontal defection coil on the screen side of the horizontal deflection coil mounted inside of the ferrite core ranges from 80% of an inner face actual size (FS) of an end section on the screen side of the ferrite core at the narrowest portion of said flange section to no more than 110% of an inner face actual size (FS) of an end section on the screen side of the ferrite core at the widest portion of said flange section; and a holder for fixing the horizontal and vertical deflection coils and the ferrite core at predetermined positions and insulating the horizontal and vertical deflection coils.