Apparatus for correcting misconvergence and geometric distortion of deflection yoke

An apparatus for correcting a misconvergence of a deflection yoke, comprising:

• a generally conical coil separator having a neck part and screen part;
• an upper horizontal deflection coil and lower horizontal deflection coil disposed respectively on the upper and lower portions of the inner surface of said screen part of said coil separator in such a manner that they can electrically be connected to each other;
• a left vertical deflection coil and right vertical deflection coil disposed respectively on the left and right portions of the outer surface of said screen part of said coil separator in such a manner that they can electrically be connected to each other;
• a generally cylindrical ferrite core disposed on said outer surface of said screen part of said coil separator to reinforce magnetic fields of said left and right vertical deflection coils;
• coma precoils disposed on said neck part of said coil separator in such a manner that they can electrically be connected to said left and right vertical deflection coils, said coma precoils generating pin-cushion magnetic fields to offset barrel magnetic fields generated by said left and right vertical deflection coils;
• and
• misconvergence adjustment means for controlling the relative amounts of current flowing respectively through left ones of said coma precoils and right ones of said coma precoils to adjust left and right relative magnetic fields so as to adjust a vertical misconvergence on a screen.

An apparatus for correcting a misconvergence and geometric distortion of a deflection yoke, comprising:

• a generally conical coil separator having a neck part and screen part;
• an upper horizontal deflection coil and lower horizontal deflection coil disposed respectively on the upper and lower portions of the inner surface of said screen part of said coil separator in such a manner that they can electrically be connected to each other;
• a left vertical deflection coil and right vertical deflection coil disposed respectively on the left and right portions of the outer surface of said screen part of said coil separator in such a manner that they can electrically be connected to each other;
• a generally cylindrical ferrite core disposed on said outer surface of said screen part of said coil separator to reinforce magnetic fields of said left and right vertical deflection coils;
• coma precoils disposed on said neck part of said coil separator in such a manner that they can electrically be connected to said left and right vertical deflection coils, said coma precoils generating pin-cushion magnetic fields to offset barrel magnetic fields generated by said left and right vertical deflection coils;
• distortion adjustment means for controlling the relative amounts of current flowing respectively through said left and right vertical deflection coils to adjust left and right relative magnetic fields so as to adjust a geometric distortion on a screen;
• and
• misconvergence adjustment means for controlling the relative amounts of current flowing respectively through left ones of said coma precoils and right ones of said coma precoils to adjust left and right relative magnetic fields so as to adjust a vertical misconvergence on said screen.

An apparatus for correcting a misconvergence and geometric distortion of a deflection yoke, comprising:

• a generally conical coil separator having a neck part and screen part;
• an upper horizontal deflection coil and lower horizontal deflection coil disposed respectively on the upper and lower portions of the inner surface of said screen part of said coil separator in such a manner that they can electrically be connected to each other;
• a generally cylindrical ferrite core disposed on the outer surface of said screen part of said coil separator;
• left upper and left lower vertical deflection coils and right upper and right lower vertical deflection coils disposed on said ferrite core in such a manner that they can electrically be connected to each other to generate left and right vertical deflection magnetic fields;
• coma precoils disposed on said neck part of said coil separator in such a manner that they can electrically be connected to said left and right vertical deflection coils, said coma precoils generating pin-cushion magnetic fields to offset barrel magnetic fields generated by said left and right vertical deflection coils;
• and
• misconvergence adjustment means for controlling the relative amounts of current flowing respectively through left ones of said coma precoils and right ones of said coma precoils to adjust left and right relative magnetic fields so as to adjust a vertical misconvergence on said screen.