Patent ID: 6452347
Filing Date: 2002-09-17
Classification: H04N

Abstract:
A deflection system performing reciprocating scanning by horizontally deflecting an electron beam in a reciprocating manner in response to a vertical synchronizing signal and a horizontal synchronizing signal, comprising:a vertical deflection coil; a horizontal deflection coil; a horizontal deflection current supply circuit supplying a horizontal deflection current for horizontally deflecting said electron beam in a reciprocating manner; an induced current detection circuit detecting a current component induced to said vertical deflection coil by said horizontal deflection current flowing in said horizontal deflection coil; a sawtooth wave voltage generation circuit generating a sawtooth wave voltage synchronous with said vertical synchronizing signal; a first current supply circuit receiving said sawtooth wave voltage generated by said sawtooth wave voltage generation circuit and supplying a first sawtooth wave current for vertically deflecting said electron beam to said vertical deflection coil; a second current supply circuit supplying a second sawtooth wave current for parallelizing forward and backward scanning lines with each other to said vertical deflection coil; and a correction voltage addition circuit adding a correction voltage for canceling said current component detected by said induced current detection circuit to said sawtooth wave voltage generated by said sawtooth wave voltage generation circuit.