Method of attenuating unwanted electric field radiation and a cathode ray tube display

摘要

A method of attenuating an unwanted electric field radiation caused by electrostatic induction on an internal conductive coating of a cathode ray tube by a pulse voltage generated by a deflection circuit is provided. A reverse pulse voltage, which is reverse in polarity to the pulse voltage of the deflection circuit, is impressed on an external conductive coating of the cathode ray tube and electrostatic induction induces a pulse voltage on the internal conductive coating which is reverse in polarity to a pulse voltage of the deflection yoke induce on the internal conductive coating through an electrostatic capacitance existing between the internal conductive coating and the external conductive coating so that an unwanted electric field radiation from the front screen of a cathode ray tube is attenuated.