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    • 66. 发明授权
    • Convergence correction apparatus
    • 收敛校正装置
    • US4704564A
    • 1987-11-03
    • US889331
    • 1986-07-23
    • Masaaki ItoToshio Kobayashi
    • Masaaki ItoToshio Kobayashi
    • H04N9/28H01J29/70H01J29/76
    • H01J29/705H01J2229/5687
    • A convergence correction apparatus comprises a pair of horizontal deflecting coils and a pair of vertical deflecting coils constituting a deflection yoke of a self-convergence system color picture tube, saturable reactors for correcting convergence error in horizontal lines by varying a distribution of a horizontal deflection magnetic field with time, auxiliary control coils coupled to the vertical deflecting coils and wound of the saturable reactors for varying inductances of coils of the saturable reactors by auxiliary control magnetic fields generated by the auxiliary control coils, and a correcting circuit for supplying to the auxiliary control coils a current which has a waveform other than a sawtooth waveform and has a period equal to the vertical deflection period, and for non-linearly varying magnitudes of the auxiliary magnetic fields generated thereby.
    • 会聚校正装置包括一对水平偏转线圈和一对构成自会聚系统彩色显象管的偏转线圈的垂直偏转线圈,用于通过改变水平偏转磁体的分布来校正水平线中的会聚误差的可饱和电抗器 具有时间的辅助控制线圈,耦合到垂直偏转线圈和可饱和电抗器的绕组,用于通过由辅助控制线圈产生的辅助控制磁场来改变可饱和电抗器的线圈的电感;以及校正电路,用于向辅助控制器 对具有不同于锯齿波形的波形的电流进行线圈化,并具有与垂直偏转周期相等的周期,以及由此产生的辅助磁场的非线性变化幅度。