Piezoelectric transformer and method for driving the same
US5365141A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Feb 16, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/40
Abstract
A piezoelectric transformer is constituted of a piezoelectric plate in the form of an elongated plate and electrodes formed thereon. A pair of driver sections and a generator section are formed in two opposite end regions of the piezoelectric plate containing a mechanical resonance node and in a central region of the piezoelectric plate containing a mechanical resonance node, respectively, in an oscillation mode of three times of 1/2 of the resonance wavelength .lambda. of the longitudinal mechanical oscillation in length of the piezoelectric plate. The driver sections are polarized in a thickness direction but in directions opposite to each other. The driver sections have a distance of .lambda./2 from the corresponding end of the piezoelectric plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.