Ferrite core with concave and convex portions

Details Ferrite core with concave and convex portions Ferrite core with concave and convex portions

1996-10-28

1998-07-28

Dombroske, George M.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

335210, 335211, H01J 2970, H01F 700

Patent

active

057866619

ABSTRACT:
A ferrite core for a deflection yoke of a CRT includes concave and convex portions for correcting a raster distortion of the deflection yoke by varying a magnetic path at one end of a screen portion of the ferrite core. The ferrite core may be incorporated in a deflection yoke that includes a horizontal deflection coil for deflecting electron beams emitted from an electron gun in the horizontal direction, a vertical deflection coil for deflecting the electron beams in the vertical direction, and a holder for fixing the horizontal deflection coil and the vertical deflection coil to given positions and separating them from each other. The ferrite core also prevents a magnetic force caused by the horizontal and vertical deflection coils from being reduced.

REFERENCES:
patent: 3163794 (1964-12-01), Bloomsburg et al.
patent: 4841267 (1989-06-01), Watabe et al.
patent: 5402091 (1995-03-01), Ikeuchi

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