Deflection unit for in-line type cathode ray tubes having grooves separated by groove walls including a thickened groove wall section

摘要

The present invention relates to a deflection unit for mounting on an in-line type cathode ray tube comprising a coil body including grooves for receiving wound coil wires, the grooves extending substantially in a straight line. The groove extension of at least one groove is changed at at least one location such that the coil wires received in the groove become curved in the area of the changed groove extension. In a preferred embodiment the grooves are separated from each other by groove walls which in the area of the changed groove extension comprise a thickening and optionally a bulge. The coil wires wound onto the coil body form the horizontal coil or the vertical coil. The arrangement serves the selective fine adjustment of the deflection fields for eliminating convergence, coma and/or geometry errors.