METHOD OF MANUFACTURING A STATIC CONVERGENCE UNIT, AND A COLOUR DISPLAY TUBE COMPRISING A CONVERGENCE MANUFACTURED ACCORDING TO THE METHOD

摘要

The method according to the invention consists in the determination of data of the convergence errors of a colour display tube, data being derived from the said determinations for determining the polarity and the intensity of magnetic poles of a structure. The structure thus obtained generates a static, permanent, multipole magnetic field adapted to the convergence errors occurring, so that the errors are corrected.