Patent ID: 8437652
Filing Date: 2013-05-07
Classification: G03G,H01L,H02M

Abstract:
1. A high-voltage power supply comprising: a piezoelectric transformer that outputs a voltage in accordance with a supplied drive frequency; a rectification part that is connected to an output side of the piezoelectric transformer; a drive frequency generating part that generates the drive frequency supplied to the piezoelectric transformer; a voltage detection part that detects an output voltage of the piezoelectric transformer or the rectification part; and a control part that controls the drive frequency generating part such that a drive frequency corresponding to the output voltage detected by the voltage detecting part is generated; wherein a first time constant, which is a time constant of the control part, is smaller than a second time constant, which is a time constant of a control target including the piezoelectric transformer and the rectification part, and a third time constant, which is a time constant of the voltage detecting part, is smaller than the second time constant.