Piezoelectric power generator for a portable power supply unit and portable electronic device equipped with same
US5751091A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1996 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Jan 31, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/186
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power generator is provided and includes a piezoelectric transducer which generates electric power upon application of a strain. The power generator includes a vibrating arm having a sandwich structure wherein a support layer is held between at least two piezoelectric portions. The vibrating arm is wider on the support end than at a free end. The piezoelectric portions are extended to a root portion of the vibrating arm so that strain energy may efficiently be converted into electric energy. The piezoelectric portions each have a laminated structure so that piezoelectric power generator having the electromotive voltage and the capacitance optimum for charging may be realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.