The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 2011
Filed:
Jun. 23, 2006
Shuzo Iwashita, Kirishima, JP;
Sin Ishikura, Kirishima, JP;
Takayuki Yamamoto, Kirishima, JP;
Hisamitsu Sakai, Kirishima, JP;
Shuzo Iwashita, Kirishima, JP;
Sin Ishikura, Kirishima, JP;
Takayuki Yamamoto, Kirishima, JP;
Hisamitsu Sakai, Kirishima, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
A method for driving a liquid drop ejector () equipped with a piezoelectric actuator () including a piezoelectric ceramic layer () having a size covering a plurality of pressurizing chambers (). An arbitrary piezoelectric deformation region () of the liquid drop ejector () is deflected in one thickness direction and the opposite direction, respectively, by applying a driving voltage waveform including a first voltage (−V) and an equivalent second voltage (+V) of the opposite polarity in order to vary the volume of the pressurizing chambers () of a corresponding liquid drop ejecting portion (), and a liquid drop is ejected through a communicating nozzle (). Since gradual creep deformation of the inactive region () of the piezoelectric ceramic layer () is prevented, the ink drop ejection performance is maintained at a good level over a long term.