Method for driving piezoelectric element or optical modulator including piezoelectric element
US7569973B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2008 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | May 28, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/802
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed are a method for driving a piezoelectric element or an optical modulator including a piezoelectric element and a recorded medium recorded with a program for executing the same. In accordance with an embodiment of the present invention, the method for driving a piezoelectric element causing a displacement object to be displaced by being contracted or expanded according to a supplied driving voltage, including supplying a driving signal to the piezoelectric element during a first driving period in a first voltage range; supplying a control signal for controlling a polarization hysteresis of the piezoelectric element according to a driving, performed during the first driving period, to the piezoelectric element; and supplying the driving signal to the piezoelectric element during a second driving period in a second voltage range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.