| 摘要 |
A piezoelectric transformer ( 101 ) comprises a layered structure ( 15 ) formed by alternately stacking a plurality of internal electrodes ( 13 ) and a plurality of piezo-electric ceramics layers ( 103 ) in thickness direction, first electrodes ( 21, 23 ) formed on side surfaces of said layered structure ( 15 ) and connected to said internal electrodes ( 13 ), at least one pair of second electrodes ( 27, 29, 31, 33, 35, 37 ) formed on the side surfaces in areas different from those of the first electrodes ( 21, 23 ) and having a same potential, and a circuit board for driving the piezoelectric transformer. The piezoelectric transformer ( 101 ) is mounted on the circuit board. Each of the at least one pair of the second electrodes ( 27, 29, 31, 33, 35, 37 ) opposite to each other is electrically connected to the circuit board.
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