Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method of driving piezoelectric ink jet head










Image Number 7 for United States Patent #7413292.

The present invention is directed to a method for driving a piezoelectric ink jet head comprising a piezoelectric actuator AC that includes two piezoelectric ceramic layers 7a, 7b having such a size that covers the plurality of pressure chambers 2, wherein an electric field of opposite sense to the polarizing direction is applied to the second piezoelectric ceramic layer 7b by using the common electrodes 8a, 8b and, (1) for the pressure chambers 2 from which the ink is discharged, an electric field of the same sense as the polarizing direction of the layer is applied to the first piezoelectric ceramic layer 7a by using the individual electrode 10 and the first common electrode 8a, thereby causing the region of the piezoelectric actuator AC to deflect toward the pressure chamber 2, while (2) for the pressure chambers 2 from which the ink should not be discharged, an electric field of the opposite sense to the polarizing direction is applied to the first piezoelectric ceramic layer 7a by using the electrodes 10, 8a, thereby to maintain the region of the piezoelectric actuator AC in the initial state, so as to discharge an ink droplet selectively through the nozzle 3 that communicates with the pressure chamber 2 described in (1) and form a dot.








 
 
  Recently Added Patents
Single check memory devices and methods
Powder for layerwise manufacturing of objects
Method for resource allocation in a wireless communication network, method for error-free transmission of information, node and wireless communication network
Techniques for distributed storage aggregation
Compatibility check
Device and method including a soldering process
Systems and methods for picture based communication
  Randomly Featured Patents
Phase abstraction for formal verification
Condensation-free shower mirror heated by hot shower stream
Keyboard stand
Metallic laminate and method of manufacturing the same
High fat to protein ratio egg yolk product and methods for making and utilizing same
Power line conditioner
Bag carrier
Apparatus and method for filing a syringe
Corner cube array for use in incandescent lamps
Optical connector for optical fiber cables