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专利名称：Color cathode-ray tube and color cathode-ray tube apparatus
发明人：Katsuyo Iwasaki申请号：US09675121申请日：20000928公开号：US067534B1公开日：20040622
专利附图：
摘要：A color cathode-ray tube including an in-line electron gun and a color cathode-ray tube apparatus including the same are provided. At an end, on a screen side, of theelectron gun, two pairs of members for generating a magnetic field are placed above and
below side beams of three electron beams so as to sandwich them, respectively. Betweeneach of the two pairs of members for generating a magnetic field, a localized barrelmagnetic field is formed to vary cross-sectional shapes of the side beams positioned onboth sides of a center beam so that the cross-sectional shape of one of the side beams ishorizontally or vertically elongated to a higher degree than that to which the cross-sectional shape of the other of the side beams is. Magnetic fields for reverse correctionof spot distortions of the side beams are generated and therefore the symmetry in thespot distortions of the side beams asymmetric with each other is improved, thusimproving focus quality.
申请人：MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
代理机构：Merchant & Gould, P.C.
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