A METHOD OF REDUCING DEFLECTION ERRORS FOR FLAT INTELLIGENT TRACKING (FIT) CRTS

摘要

The present invention relates to a method and a picture display device for reducing cathode drive-induced deflection errors in an index type cathode ray tube (CRT), and especially a flat intelligent tracking (FIT) CRT. The method comprises the steps of generating at least one electron beam; driving said beam by modulating a cathode potential; predicting a deflection error for the beam due to the cathode drive; and controlling compensation means in accordance with said prediction for reducing said deflection error.