Apparatus for electron beam deflection in a cathode ray tube

摘要

The invention relates to an apparatus for electron beam deflection in a cathode ray tube, in particular in a picture tube of a television set. In addition to a deflection coil arrangement for horizontal and vertical deflection of the electron beam, the apparatus has an auxiliary deflection coil arrangement, by means of which the electron beam can be influenced for the purpose of convergence correction. According to the invention, the apparatus is furthermore provided with a compensation coil arrangement for producing a magnetic compensation field. The compensation coil arrangement is arranged and designed such that the compensation field essentially compensates for the stray magnetic field of the deflection coil arrangement in the physical region of the auxiliary deflection coil arrangement. <IMAGE>