| 摘要 |
PURPOSE:To remove a complicated distortion of higher order with simple and uncostly constitution by forming toroidal coils from main and aux. windings, which exist in specific angle ranges with the deflecting direction as the center. CONSTITUTION:Toroidal coils 4a, 4b to generate a magnetic field for deflection of electron beam in the y-direction serve as main windings to perform main deflecting action, which exist in the range 70 deg. to the left and right of the y-axis as the center. Windings 41a-1, 41a-2, 41b-1, 41b-2 serve as aux. windings to perform distortion correcting action, which lie in the ranges 65-90 deg. to the left and right of the y-axis as the center. Further coil winding parts 3a, 3b are furnished to generate a magnetic field for deflection of electron beam in the x-direction. Thereby a complicated distortion of higher order on the picture field of a color cathode-ray tube can be removed with simple construction, and such problems will be solved as hardness to manufacture and complification of the structure due to addition of any other correcting means, for ex. a magnet, and also ill influence of magnet upon convergence and color purities.
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