Deflection yoke for cathode ray tube
OwnerHyung Dal Joo, Woo Young Yanginventors
Life of this patent
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Abstract
A deflection yoke for a cathode ray tube, with reduced weight and volume plus a low cost of manufacture is obtained by making a ferrite core housed in the deflection yoke very light and thin, based on an optimized design obtained through a number of experimental trials.
Claims55
A deflection yoke for a cathode ray tube mounted with a panel, a funnel, an electron gun for emitting electron beams, and a deflection yoke for deflecting the electron beams emitted from the electron gun, the deflection yoke comprising:
- a horizontal deflection coil for deflecting the electron beams in the horizontal direction;
- a vertical deflection coil for deflecting the electron beams in the vertical direction;
- a holder for supporting and at the same time insulating the horizontal and vertical deflection coils;
- and
- a ferrite core for reducing a leakage flux on a return path of magnetic fields generated by the horizontal and vertical deflection coils, where a thickness of the ferrite core is less than 6 mm, and given that maximum and minimum thickness points exist in the ferrite core, the maximum thickness point of the ferrite core is not less than 3 mm.
A deflection yoke for a cathode ray tube mounted with a panel, a funnel, an electron gun for emitting electron beams, and a deflection yoke for deflecting the electron beams emitted from the electron gun, the deflection yoke comprising:
- a horizontal deflection coil for deflecting the electron beams in the horizontal direction, a vertical deflection coil for deflecting the electron beams in the vertical direction;
- a holder for supporting and at the same time insulating the horizontal and vertical deflection coils;
- and
- a ferrite core for reducing a leakage flux on a return path of magnetic fields generated by the horizontal and vertical deflection coils, where a thickness of the ferrite core is less than 6 mm and maximum and minimum thickness points exist in the ferrite core and the maximum thickness point of the ferrite core is located between a end of a neck side of the ferrite core and ½ Lf, wherein Lf is a length of the ferrite core.
A deflection yoke for a cathode ray tube mounted with a panel, a funnel, an electron gun for emitting electron beams, and a deflection yoke for deflecting the electron beams emitted from the electron gun, the deflection yoke comprising:
- a horizontal deflection coil for deflecting the electron beams in the horizontal direction;
- a vertical deflection coil for deflecting the electron beams in the vertical direction;
- a holder for supporting and at the same time insulating the horizontal and vertical deflection coils;
- and
- a ferrite core for reducing a leakage flux on a return path of magnetic fields generated by the horizontal and vertical deflection coils, where the funnel has a yoke placement portion on which the yoke is mounted, and a cross-section of an inner surface of the yoke placement portion or a cross-section for both the inner and an outer surface of the yoke placement portion gradually changing from a circular shape to a non-circular shape approaching a screen side from a neck side, and a maximum thickness point of the ferrite core ranges from 3 mm to 6 mm in thickness.
Dependencies are inferred from the claim text.