Invention Grant
- Patent Title: Method for driving liquid ejector
- Patent Title (中): 驱动液体喷射器的方法
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Application No.: US13022491Application Date: 2011-02-07
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Publication No.: US08210630B2Publication Date: 2012-07-03
- Inventor: Shuzo Iwashita , Sin Ishikura , Takayuki Yamamoto , Hisamitsu Sakai
- Applicant: Shuzo Iwashita , Sin Ishikura , Takayuki Yamamoto , Hisamitsu Sakai
- Applicant Address: JP Kyoto
- Assignee: Kyocera Corporation
- Current Assignee: Kyocera Corporation
- Current Assignee Address: JP Kyoto
- Agency: DLA Piper LLP (US)
- Priority: JP2005-185791 20050624; JP2005-376131 20051227
- Main IPC: B41J29/38
- IPC: B41J29/38 ; B41J2/045 ; H01L41/00 ; H02N2/00

Abstract:
A method for driving a liquid ejector (1) provided with a piezoelectric actuator (7) including a piezoelectric ceramic layer (6) having a size covering a plurality of pressurizing chambers (2). An arbitrary piezoelectric deformation region (8) of the liquid ejector (1) is deflected in one thickness direction and the opposite direction individually by applying a driving voltage waveform including a first voltage (−VL) and an equivalent second voltage (+VL) of the opposite polarity in order to vary the volume of the pressurizing chambers (2) of a corresponding liquid droplet ejecting portion (4), and a liquid droplet is ejected through a communicating nozzle (3). Since gradual creep deformation of the inactive region (16) of the piezoelectric ceramic layer (6) is prevented, the ink droplet ejection performance is maintained at a good level over a long period.
Public/Granted literature
- US20110148963A1 Method for Driving Liquid Ejector Public/Granted day:2011-06-23
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