PICTURE SIZE CONTROL CIRCUIT

摘要

The picture size control circuit on power on/off comprises: a pulse width modulation (PWM) control output section (7) increasing and decreasing the duty ration of PWM pulse for a period of time by detecting the output of power on/off signal of micom (5); a low pass filter (8) converting the PWM pulse output into the DC voltage; a deflection control section (9) outputting the horizontal/vertical deflection current control signal according to the DC voltage level of the low pass filter. This method is useful for preventing the spot phenomenon and removing the stimulation of eye at the time of power on/off.