An apparatus for television in color visual exhibition with a tube of the catodicos

摘要

Colour television display apparatus in which for correction of astigmatic deflection errors a correction current flows through the coil halves of at least one deflection coil unit, which current induces a second correction current in the other deflection coils so that two correction quadripolar fields are produced. The voltage produced by the induced current across each deflection coil half is zero and the deflection coil parts are toroidally wound on the core. The apparatus may be provided with phase-shifting networks.