PIEZOELECTRIC ACTUATOR DRIVER - WAC DATA SERVICE CO LTD

Title:

PIEZOELECTRIC ACTUATOR DRIVER

Document Type and Number:

WIPO Patent Application WO/2004/055966

Kind Code:

A1

Abstract:

A driver for driving piezoelectric actuators with drastically reduced drive currents during on/off switch control. The power consumption of the driver is reduced. Each of the piezoelectric actuators (1a to 1h) is composed of a plate and piezoelectric sheets attached to the opposed surfaces of the plate. A plus power supply line (19) or a minus power supply line (21) is connected to the opposite side of each piezoelectric sheet to the side attached to the plate. The controller (27) selectively applies a plus or minus drive voltage to the piezoelectric sheets to perform on/off control. Thereafter, the controller (27) turns off the drive voltage applied to the piezoelectric sheets subjected to the on-control and turns on a drive voltage to the piezoelectric sheets of the piezoelectric electric actuator (1a to 1h) to be driven next.

Inventors:

WATANABE KAZUHISA (JP)
ENOMOTO SATOSHI (JP)
ENOMOTO HIROSHI (JP)
KANAI SHIGERU (JP)
TAKANE TOSHIAKI (JP)

Application Number:

PCT/JP2003/015840

Publication Date:

July 01, 2004

Filing Date:

December 11, 2003

Export Citation:

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Assignee:

WAC DATA SERVICE CO LTD (JP)
CDK CO LTD (JP)
WATANABE KAZUHISA (JP)
ENOMOTO SATOSHI (JP)
ENOMOTO HIROSHI (JP)
KANAI SHIGERU (JP)
TAKANE TOSHIAKI (JP)

International Classes:

H01L41/04; H02N2/06; H01L41/09; (IPC1-7): H02N2/06

Foreign References:

JPH08218255A	1996-08-27
JP2002113864A	2002-04-16
JPH10773A	1998-01-06
JPH07141028A	1995-06-02
JPH05206537A	1993-08-13
JPH05302251A	1993-11-16

Other References: