Piezoelectric transformer and electronic apparatus
US11495732B2 · kind B2 · utility
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3References
17Claims
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Key dates
| Filing date | Oct 10, 2019 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | Mar 13, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/505
Abstract
A piezoelectric transformer comprises at least a laminate of a first member, a first piezoelectric element, a second piezoelectric element and a second member sequentially stacked one on the other in the above-listed order and a pressurizing mechanism for squeezing the first member and the second member together in the stacking direction. The ratio of the electromechanical coupling coefficient k33 relative to the electromechanical coupling coefficient k31 (k33/k31) of the first piezoelectric element and the second piezoelectric element is not less than 2.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.