Resources Contact Us Home
Piezoelectric transducer for use in ink ejector and method of manufacturing the piezoelectric transducer

Image Number 2 for United States Patent #7134746.

Inner individual electrodes are formed at intervals on a piezoelectric ceramic layer so as to correspond in a one-to-one relationship with ink channels, and an inner common electrode are formed on another piezoelectric ceramic layer. The required number of piezoelectric ceramic layers with inner individual electrodes and with an inner common electrode are laminated alternately. An outer common electrode is connected to the inner common electrodes, and outer individual electrodes are connected to the respective inner individual electrodes. The capacitance between the outer common electrode and each of the outer individual electrodes is measured. A polarization electric field adjusted based on the measured value is applied between the common electrode and each of the outer individual electrodes to perform polarization. As a result, each area defined over an ink channel by the stacked inner individual and common electrodes is polarized so as to be deformed by a uniform amount when a constant drive voltage is used.

  Recently Added Patents
Securing information by hiding identity on a computing device
HSP20 inhibits amyloidogenesis and neurotoxicity
Associating objects in databases by rate-based tagging
Apparatus and method for controlling a tunable matching network in a wireless network
Positive electrode for secondary battery, and secondary battery
Visually tracking an object in real world using 2D appearance and multicue depth estimations
  Randomly Featured Patents
Electrostatic discharge and electrical overstress protection circuit
Locking device for a telescopic tube assembly
System, method and apparatus for protecting consumer electronic devices from brownouts and short duration power outages
Solid block chemical dispenser for cleaning systems
Display device and display unit using the same
Thermal sensing scanning probe microscope and method for measurement of thermal parameters of a specimen
Vinylbenzyl group-containing succinic anhydride
Sensor, in particular for measuring the viscosity and density of a medium
Wrench hand tool pull
System, method and article of manufacture for authorizing the use of electronic content utilizing a laser-centric medium