Piezoelectric transformer
US5959391A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1997 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Feb 14, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/40
Abstract
A piezoelectric transformer includes a plate-shaped piezoelectric member having a driving section located at a first portion of the piezoelectric member including a first end and a power-generating section located at a second portion of the piezoelectric member including a second end. The driving section is made by repeatedly and alternately laminating a driving electrode and a portion of the piezoelectric member which is polarized in the thickness direction. The power-generating section includes a power-generating electrode and a portion of the piezoelectric member which is polarized in the longitudinal direction. In the piezoelectric transformer, at least one of the driving section and the power-generating section has an area which is near a boundary between the driving section and the power-generating section which has a lower degree of polarization than the degree of polarization in areas spaced away from the boundary between the driving section and the power-generating section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.