| 摘要 |
PURPOSE:To reduce distortion of deflected electron beams and to improve their resolution by forming a vertical deflection magnetic field in an inclined magnetic field generating device almost symmetrically to a flat plane including X, Z axes and by generating a pin cushion-shaped vertical main deflecting magnetic field or the like, which mainly has a horizontal component in an electron beam passing region. CONSTITUTION:A horizontal deflecting magnetic field in a color picture tube is formed of a barrel-shaped horizontal main deflecting magnetic field 1 and horizontal auxiliary deflecting magnetic fields 2, 3 which are symmetrically shaped opposite to the magnetic field 1. This picture tube is composed of a panel 8, a funnel 9, a neck 10, and an envelope. A phosphor screen 11 made of respective phosphor dots is formed on an inner surface of the panel 8. An electron gun 13 is disposed on an inner surface of the neck 10, and electron beams B, G, R are radiated on the phosphor plane 11. A coil 17 wound in a saddle shape on an inner surface of a separator 16 is used to form a horizontal main deflecting magnetic field from a combination of the main deflecting magnetic field and the auxiliary deflecting magnetic field. The horizontal auxiliary deflecting magnetic field is formed by a toroidal coil 18-1.
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