| 摘要 |
Deflection yoke for cathode-ray tubes with a north/south geometry correction comprising a pair of horizontal deflection coils (3) and a pair of vertical deflection coils (4), the two pairs being isolated one from the other by a separator (2), a ferrite ring (5) at least partly covering the deflection coils and having a flared front part, the deflection yoke comprising in its front region at least one pair of magnetic means to modify locally the magnetic field in the said front region and to correct the geometry of the image created on the screen of the tube, the magnetic means being placed in the space in such a way that, for a plane (P) containing the longitudinal axis (Z) of the deflection yoke and the axis of symmetry (Y) of a magnetic means, and for the point M of the plane (P) corresponding to the point of minimum coordinates of the said means, the intersection of the ring with (P) is at least partly in its front part, located outside the region delimited by the half line (D1) passing through M and perpendicular to Z, and the half line (D2) passing through M and making an angle of 45 DEG with (D1). <IMAGE>
|
