Deflecting device for cathode-ray tube

Claim 2

A deflecting device for cathode-ray tube having a screen comprising deflection means to be mounted on said cathode-ray tube and including a vertical deflection means for causing deflection along an axis by generating a vertical deflection magnetic field, and means for picking up leakage fluxes generated from said vertical deflection means and passing the leakage fluxes directly from a first to a second position, and from a third to a fourth position, said first and second positions corresponding to the two corners of said screen nearest one end of said axis, and said third and fourth positions corresponding to the other two corners of said screen, thereby deforming towards a pincushion-distributed vertical deflection magnetic field that portion of said vertical deflection magnetic field which is generated in a position corresponding to the cone portion of said cathode-ray tube.

Claim 3

A deflecting device for color cathode-ray tube having a screen comprising deflection means to be mounted on said color cathode-ray tube and including a vertical deflection means for generating a barrel-distributed deflection magnetic field for causing deflection along an axis and a horizontal deflection coil for generating a pincushion-distributed deflection magnetic field, and means for picking up leakage fluxes generated from said vertical deflection means and passing the leakage fluxes directly from a first to a second position, and from a third to a fourth position, said first and second positions corresponding to the two corners of said screen nearest one end of said axis, and said third and fourth positions corresponding to the other two corners of said screen, thereby deforming towards a pincushion-distributed vertical deflection magnetic field that portion of said barrel-distributed vertical deflection magnetic field which is generated in a position corresponding to the cone portion of said cathode-ray tube.

Claim 4

A deflecting device for color cathode-ray tube having a screen comprising deflection means to be mounted on said color cathode-ray tube and including a vertical deflection means for generating a barrel-distributed deflection magnetic field for causing deflection along an axis and a horizontal deflection coil for generating a pincushion-distributed deflection magnetic field, and means for picking up leakage fluxes generated from said vertical deflection means and passing the leakage fluxes directly from a first to a second position, and from a third to a fourth position, said first and second positions corresponding to the two corners of said screen nearest one end of said axis, and said third and fourth positions corresponding to the other two corners of said screen, thereby deforming towards a pincushion-distributed vertical deflection magnetic field that portion of said barrel-distributed vertical deflection magnetic field which is generated in a position corresponding to the cone portion of said cathode-ray tube.

Claim 5

A deflecting device for color cathode-ray tube according to claim 2, wherein said color cathode-ray tube includes an in-line type electron gun assembly.

Claim 6

A deflecting device for a color cathode-ray tube comprising a substantially cylindrical core with the diameter of one end larger than that of the other, a deflecting means having first and second vertical deflecting coils facing each other and wound around said core to provide a barrel-distribution deflecting magnetic field and generating a barrel-distribution vertical-deflection magnetic field and a pincushion-distribution horizontal-deflection magnetic field, and a magnetic means having first, second, third and fourth arm portions arranged at the large-diameter end side of said core correspondingly to the four corners of a screen of said cathode-ray tube and extending from the small-diameter end to the large-diameter end of said core for passing leakage fluxes directly from said first to said second arm portions and from said third to said fourth arm portions, said first and second arm portions being disposed nearest said first coil and said third and fourth arm portions being disposed nearest said second coil.

Claim 7

A deflecting device for a color cathode-ray tube comprising a substantially cylindrical core with the diameter of one end larger than that of the other, a deflecting means having first and second vertical deflecting coils facing each other and wound around said core to provide a barrel-distribution deflecting magnetic field and generating a barrel-distribution vertical-deflection magnetic field and a pincushion-distribution horizontal-deflection magnetic field, and a magnetic means having first, second, third and fourth arm portions arranged at the large-diameter end side of said core correspondingly to the four corners of a screen of said cathode-ray tube and extending from the small-diameter end to the large-diameter end of said core for passing leakage fluxes directly from said first to said second arm portions and from said third to said fourth arm portions, said first and second arm portions being disposed nearest said first coil and said third and fourth arm portions being disposed nearest said second coil.

Claim 8

A deflecting device according to claim 4, wherein said magnetic member is formed of a pair of magnetic plates so arranged as to cover the facing end portions of said pair of vertical deflecting coils, each said magnetic plate having two out of said four arm portions.

Claim 9

A deflecting device according to claim 4, wherein the four arm portions of said magnetic member are formed independently of one another.

Claim 10

A deflecting device according to claim 4, 5 or 6, wherein said core is formed of substantially symmetrical first and second core sections, and said pair of vertical deflecting coils are toroidally wound around said first and second core sections respectively.