| 摘要 |
A piezoelectric transformer (101) comprising a stack (15) including alternate inner electrodes (13) and piezoelectric ceramic layers (103), first electrodes (21, 23) provided on side faces of the stack (15) and connected to the inner electrodes (13), at least one pair of second electrodes (27, 29, 31, 33, 35, 37) provided opposedly on other parts of the side faces where the first electrodes (21, 23) are provided and given the same potential, and a circuit board having a circuit for driving the piezoelectric transformer (101), wherein the piezoelectric transformer (101) is mounted on the circuit board, and the second electrodes (27, 29, 31, 33, 35, 37) are electrically connected to the circuit board.
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