Piezoelectric actuator, piezoelectric actuator driving method and computer readable storage medium stored with program for making computer execute piezoelectric actuator driving method
US6323578A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2000 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Jan 4, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/2042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A piezoelectric actuator has a rotational moving member and a supporting member disposed opposite to the rotational moving member and having cantilever portions. Each of the cantilever portions of the supporting member has a fixed end and a free end opposite to the fixed end for contacting the rotational moving member when the supporting member is oscillated. A piezoelectric member is disposed on a respective one of the cantilevers of the supporting member. A power source supplies a voltage to each of the piezoelectric members to oscillate the supporting member in a vibration mode higher than a secondary mode of vibration so that the free ends of the cantilevers make sufficient contact with the rotational moving member to thereby rotate the rotational moving member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.