Deflection yoke

Claim 2

A deflection yoke comprised of a. a pair of vertical deflection coils, b. a pair of horizontal deflection coils, c. a core on which said deflection coils are mounted and d. four compensation coils which are arranged symmetrically in reference to the center line of each horizontal deflection coil, wherein said compensation coils are overlapped on part of said horizontal deflection coils respectively and are arranged to generate magnetic fluxes which cause the main deflection magnetic field generated from said horizontal deflection coils to be adjusted to show pin cushion distribution at both right and left side areas of the beam scanning range and to show barrel distribution at the middle area of said range, said horizontal deflection coils adapted to generate a uniform main deflection magnetic field and said compensation coils adapted to generate compensation magnetic fluxes which flow in the direction opposite the magnetic flux of said main deflection magnetic field.

Claim 3

A deflection yoke according to claim 1 wherein a horizontal deflection source is connected to said compensation coils.

Claim 4

A deflection yoke according to claim 2 wherein a current distributor is provided to vary the ratio of the horizontal deflection current supplied to said compensation coils and said horizontal deflection coils.

Claim 5

A deflection yoke according to claim 3 wherein said compensation coils are connected in series and the serially connected compensation coils are further connected in series with said horizontal deflection coils.

Claim 6

A deflection yoke according to claim 1 wherein said compensation coils are remote from each other at the front side of each horizontal deflection coil and closer to each other at the rear side of each horizontal deflection coil and are near to each other at the rear side of each horizontal deflection coil.

Claim 7

A deflection yoke comprised of a. a pair of vertical deflection coils, b. a pair of horizontal deflection coils, c. a core on which said deflection coils are mounted and d. four compensation coils which are arranged symmetrically in reference to the center line of each horizontal deflection coil, wherein said compensation coils are overlapped on part of said horizontal deflection coils respectively and are arranged to generate magnetic fluxes which cause the main deflection magnetic field generated from said horizontal deflection coils to be adjusted to show pin cushion distribution at both right and left side areas of the beam scanning range and to show barrel distribution at the middle area of said range, said horizontal deflection coils being designed so that the main deflection magnetic field generated by said horizontal deflection coils presents pin cushion type distribution, said compensation coils being arranged so that the coils are near each other at the front side of each horizontal deflection coil and are remote from each other at the rear side of said horizontal deflection coil, said compensation coils being designed to generate magnetic fluxes which flow in the same direction as the magnetic flux of the horizontal deflection coils whereby the magnetic fields of said compensation coils is superposed on the main deflection magnetic field.

Claim 8

A deflection yoke comprised of a. a pair of vertical deflection coils, b. a pair of horizontal deflection coils, c. a core on which said deflection coils are mounted and d. four compensation coils which are arranged symmetrically in reference to the center line of each horizontal deflection coil, wherein said compensation coils are overlapped on part of said horizontal deflection coils respectively and are arranged to generate magnetic fluxes which cause the main deflection magnetic field generated from said horizontal deflection coils to be adjusted to show pin cushion distribution at both right and left side areas of the beam scanning range and to show barrel distribution at the middle area of said range, said horizontal deflection coils being designed so that the main deflection magnetic field generated by said horizontal deflection coils presents pin cushion type distribution, said compensation coils being arranged so that the coils are near each other at the front side of each horizontal deflection coil and are remote from each other at the rear side of said horizontal deflection coil, said compensation coils being designed to generate magnetic fluxes which flow in the same direction as the magnetic flux of the horizontal deflection coils whereby the magnetic fields of said compensation coils is superposed on the main deflection magnetic field.

Claim 9

A deflection yoke comprised of a. a pair of vertical deflection coils b. a pair of horizontal deflection coils, c. a core on which said deflection coils are mounted and d. four compensation coils which are arranged symmetrically in reference to the center line of each horizontal deflection coil, wherein said compensation coils are overlapped on part of said horizontal deflection coils respectively and are arranged to generate magnetic fluxes which cause the main deflection magnetic field generated from said horizontal deflection coils to be adjusted to show pin cushion distribution at both right and left side areas of the beam scanning range and to show barrel distribution at the middle area of said range, said four compensation coils being series - connected in a pair of groups respectively containing two coils, said coil groups being parallel - connected to one power supply, said four compensation coils being series - connected to another power supply, one of said two power supplies being adapTed to cause said compensation coils to generate magnetic fields which make the main deflection magnetic field to show pin cushion distribution at both right and left side areas of the beam scanning range and barrel distribution at the middle area of said range and the other power supply being adapted to cause said compensation coils to generate magnetic fields which shift two of three electron beams except for a beam in the vertical direction in the horizontal deflection magnetic field.

Claim 10

A deflection yoke comprised of a. a pair of vertical deflection coils b. a pair of horizontal deflection coils, c. a core on which said deflection coils are mounted and d. four compensation coils which are arranged symmetrically in reference to the center line of each horizontal deflection coil, wherein said compensation coils are overlapped on part of said horizontal deflection coils respectively and are arranged to generate magnetic fluxes which cause the main deflection magnetic field generated from said horizontal deflection coils to be adjusted to show pin cushion distribution at both right and left side areas of the beam scanning range and to show barrel distribution at the middle area of said range, said four compensation coils being series - connected in a pair of groups respectively containing two coils, said coil groups being parallel - connected to one power supply, said four compensation coils being series - connected to another power supply, one of said two power supplies being adapTed to cause said compensation coils to generate magnetic fields which make the main deflection magnetic field to show pin cushion distribution at both right and left side areas of the beam scanning range and barrel distribution at the middle area of said range and the other power supply being adapted to cause said compensation coils to generate magnetic fields which shift two of three electron beams except for a beam in the vertical direction in the horizontal deflection magnetic field.