| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power supply device that uses a piezoelectric transformer which achieves miniaturization and high image quality by suppressing mutual interference between drive frequencies in the piezoelectric transformer. <P>SOLUTION: The power supply device includes a first power supply circuit, which generates a first drive frequency for driving a first piezoelectric transformer on the basis of a first control signal for forming an image so as to supply a voltage generated by the drive of the first piezoelectric transformer to a first image forming part, a second power supply circuit, which generates a second drive frequency for driving a second piezoelectric transformer on the basis of a second control signal for forming an image so as to supply a voltage generated by the drive of the second piezoelectric transformer to a second image forming part, and an interference suppression element that suppresses an interference frequency due to a difference between the first/second drive frequencies by generating an electric field between the first and second piezoelectric transformers. <P>COPYRIGHT: (C)2008,JPO&INPIT |
