Convergence correcting device

A device for correcting convergence of an in-line type color picture tube of a self convergence system, comprising:

• a pair of horizontal deflection coils;
• a pair of vertical deflection coils;
• and
• a pair of saturable reactors having respectively a permanent magnet for D.C. magnetic bias, a vertical correction coil connected to a respective said vertical deflection coil in series, the vertical correction coils of said pair of saturable reactors respectively being wound to generate magnetic flux in the same direction and opposite the direction of magnetic flux generated by the permanent magnets, a pair of horizontal correction coils respectively connected to said horizontal deflection coils and having inductance thereof varied by magnetic flux from the respective said vertical correction coils, and a leakage magnetic flux guide means of c-shape which guides leakage flux from the permanent magnets to said pair of horizontal correction coils for increasing the amount of magnetic flux which determines a reference point of operation for each said horizontal correction coil to locate said reference point in a saturation region of said horizontal correction coil.