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
Integrating multimedia capabilities with circuit-switched calls
Error correct coding device, error correct coding method, and error correct coding program
Monitoring cloud-runtime operations
Intrinsic absorber layer for photovoltaic cells
3D image generating method, 3D animation generating method, and both 3D image generating module and 3D animation generating module thereof
Non-transitory computer readable recording medium storing print management program, print management device, print management method, and print system
Water slide
  Randomly Featured Patents
Method of manufacturing an apparatus controlling light
Digital video recording system and its recording medium
.DELTA..sup.1 -Pyrroline thiolactim ethers and a process for their preparation
Fuse for a small bomb
Method of treating eye disorders with silicone/fluorosilicone copolymer oil
System and method for communication with enhanced optical pointer
System and method for high speed control and rejection
Method and apparatus for installing and balancing an elevator car
Electronic component, coaxial connector, and communication device
Wavefront-projection beamformer