Method for driving piezoelectric element or optical...

Details Method for driving piezoelectric element or optical... Method for driving piezoelectric element or optical...

2008-05-28

2009-08-04

Dougherty, Thomas M (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

07569973

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.

REFERENCES:
patent: 6456417 (2002-09-01), Maywar et al.
patent: 7133184 (2006-11-01), Shin et al.
patent: 7385750 (2008-06-01), Govil et al.
patent: 2003/0067667 (2003-04-01), Wang et al.
patent: 10-2002-0032549 (2002-05-01), None
patent: 10-2006-0132940 (2006-12-01), None

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