| 摘要 |
PROBLEM TO BE SOLVED: To correct the horizontal misconvergence of a screen corner by connecting four coils in a bridge shape between the common connection points of the two coils of a saturable reactor, connecting the coil for convergence correction between the output ends and making a horizontal deflection current flow into the four coils of the two sets of the saturable reactors. SOLUTION: A second bridge circuit 14 is formed by mutually and connecting in parallel 6th and 7th coils L6 and L7 and 8th and 9th coils L8 and L9 which are serially connected between output ends O and P of a first bridge circuit 13 constituted of the 1st-4th coils L1-L4 of first and second saturable reactors 11 ad 12. Then, between the output ends Q and R, coils Lc1-Lc4 for convergence correction are connected. In this case, at setting of the respective inductances of the coils L6-L9 of the circuit 14 so as to unbalance the bridge, the coils Lc1-Lc4 correct the symmetrical horizontal misconvergence with the magnetic field of a horizontal cycle parabolic current modulated by a vertical cycle in response to the unbalance condition.
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