Image stabilization circuit for television receiver with half a wide screen

摘要

PROBLEM TO BE SOLVED: To detect high voltage fluctuation corresponding to the lightness of a screen and to prevent a vertical line from being bent by detecting the fluctuation of the secondary side high voltage current of a fly-back transformer and adding it to east-west signals. ;SOLUTION: Horizontal deflection output is corrected by east-west correction signals for which the east-west signals E/W provided from a video signal processing part 30 are amplified by an east-west signal amplifier 40. Also, in a high voltage circuit part 42, a high voltage HV guided to the secondary side of the fly-back transformer FB is supplied through a diode D to the anode of a cathode-ray tube 14. In the high voltage circuit part 42, the fluctuation of a high voltage current is detected and ABL signals are provided to the video signal processing part 30. The ABL signals are supplied to the detection means 44 of this screen stabilization circuit, the inputted signals are integrated in the detection means 44 and the integrated signals are supplied to an addition means 46. In the addition means 46, the east-west signals E/W and the integrated signals are added and supplied to the east-west signal amplifier 40.;COPYRIGHT: (C)1998,JPO