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US Patent Application 20090167823 - LIQUID TRANSPORTING APPARATUS AND PIEZOELECTRIC ACTUATOR

Application 20090167823 Filed on December 23, 2008. Published on July 2, 2009

Inventors

US Classes

347/71, Layers, plates310/317Input circuit for mechanical output from piezoelectric element

Attorney, Agent or Firm

Foreign Documents

  • 2007-338957 JP 12/28/2007
  • 2008-095731 JP 04/02/2008

International Classes

B41J 2/045
H02N 2/06

Issued Patent Number:

7874655


Abstract text


A liquid transporting apparatus includes a channel unit in which liquid transporting channel transporting the liquid is formed, the liquid transporting channel including a pressure chamber; a piezoelectric actuator which is connected to the channel unit, and which applies a pressure to the liquid in the pressure chamber, the piezoelectric actuator having: a piezoelectric layer; a first electrode arranged on a first surface of the piezoelectric layer to face the pressure chamber; a second electrode which is arranged, to face the first electrode, on a second surface of the piezoelectric layer different from the first surface; third electrodes arranged on the piezoelectric layer to sandwich the first electrode in a plan view; and fourth electrodes which are arranged, to face the third electrode, on the piezoelectric layer; a voltage applying mechanism which applies a voltage to the piezoelectric actuator; and a controller which controls the voltage applying mechanism.

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