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Title:
PIEZOELECTRIC ACTUATOR AND ITS DRIVING METHOD, MANUFACTURING METHOD FOR PIEZOELECTRIC ACTUATOR, AND DROPLET INJECTION DEVICE
Document Type and Number:
Japanese Patent JP2003243741
Kind Code:
A
Abstract:

To provide a piezoelectric actuator exhibiting a greater displacement with a simplified drive circuit.

A piezoelectric actuator includes a piezoelectric structure layer in which any of two anti-electric field points in a hysteresis characteristic has an antisymmetrical polarization-electric field hysteresis characteristic located at the same electric field polarizy. The piezoelectric structure layer exhibits a greater displacement because the hysteresis characteristic is shifted only by application of a drive electric field with the same electric field polarizy. Since the amount of ink discharged can be increased and the speed of the ink discharge can be increased, it is possible to provide a printer with an excellent ink discharge efficiency.


Inventors:
ITO MAKI
SUMI KOJI
Application Number:
JP2002000041933
Publication Date:
August 29, 2003
Filing Date:
February 19, 2002
Export Citation:
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Assignee:
SEIKO EPSON CORP
International Classes:
B41J2/045; B41J2/015; B41J2/055; B41J2/135; B41J2/14; B41J2/16; H01L41/09; H01L41/187; H01L41/22; H01L41/257; (IPC1-7): H01L41/09; B41J2/045; B41J2/055; B41J2/16; H01L41/187; H01L41/22
Attorney, Agent or Firm:
稲葉 良幸 (外2名)