Piezoelectric element
US11581479B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Dec 12, 2018 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | Oct 2, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/874
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a piezoelectric element, shift of a resonance point to a low-pitched sound side is achieved. A resonance point of a piezoelectric element moves to a low-pitched sound side when an active region is configured to be surrounded by an inactive region as in the configuration of the piezoelectric element. According to the piezoelectric element whose resonance point is moved to a low-pitched sound side, the piezoelectric element can realize a sound pressure that is sufficiently high for practical use when it is applied to an acoustic device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.