Patent ID: 6882090
Filing Date: 2005-04-19
Classification: H01L,H05B

Abstract:
1. A piezoelectric transformer having a rectangular shape in which one side in the longitudinal direction forms a primary-side region and the other side forms a secondary-side region, comprising: output electrodes to output a first output voltage in a first resonance mode according to an application of AC voltage having a first frequency and a first wavelength based on a length in the longitudinal direction of the piezoelectric transformer to an input electrode in the primary-side region, formed in an end portion of the secondary-side region; and a second output electrode to output a second output voltage in a second resonance mode, according to an application of AC voltage having a second frequency of a second wavelength based on the length to the input electrode, formed between the end portion and the primary-side region, wherein, when said piezoelectric transformer is driven in the first resonance mode, the first output voltage can be extracted from a between first output electrode and the ground at primary-side region, and, when said piezoelectric transformer is driven in the second resonance mode, the second output voltage different from the first output voltage can be extracted from between second output electrode and the ground at primary-side region.