| 摘要 |
PURPOSE:To obtain a display picture adjustment circuit for a horizontal direction having also a picture distortion correcting function by providing an integration circuit to convert vertical DY deflecting current waveform into parabolic waveform, and giving its output to the output of a frequency-voltage conversion circuit. CONSTITUTION:In the display picture adjustment circuit dealing with multiscanning, in order to improve bow-shaped picture distortion to the same direction at both the sides of a screen caused by the performance of a deflecting DY or a circuit system, the output current of a constant current circuit 8 to determine the signal delay quantity of a monostable multivibrator 2 is controlled by the parabolic waveform. Therefore, the saw tooth wave deflecting current of the vertical DY is supplied to a terminal 9. This saw tooth wave deflecting current is integrated by the integration circuit 10, and the parabolic waveform of a vertical period is formed. The distortion of a display picture can be improved by controlling the output current of the constant current circuit 8 by adding the parabolic waveform to the output voltage of the frequency-voltage conversion circuit 7. Besides, since the picture distortion correcting function and a picture display position adjusting function are uited and simplified, the addition of parts can be managed with a small quantity. |
