| 摘要 |
<p>In a deflection yoke for use in a color cathode ray tube receiver, two sets (30, 31) of sextuple pole coils formed of bifilar windings are disposed around the orbits of three electron beams emitted from an electron gun of a cathode ray tube. Horizontal-period parabolic currents produced in a bridge circuit consisting of saturable reactors (36, 37) are caused to flow in such sextuple pole coils (30,31). Further more the parabolic currents are modulated at the vertical period by the saturable reactors (36, 37). Then sextuple-pole magnetic fields are generated by the modulated parabolic currents to thereby exert vertical force on the three electron beams, hence realizing proper correction of DELTA VCR to consequently optimize the balance between the corners and the center of a screen. Such optimization is conventionally difficult due to some restrictions existing in the winding distribution of a vertical deflection coil and a horizontal deflection coil in relation to convergence and focus of side beams. <IMAGE></p> |
