EP 3072693 B1 20181128 - PIEZOELECTRIC ACTUATOR AND RECORDING HEAD
Title (en)
PIEZOELECTRIC ACTUATOR AND RECORDING HEAD
Title (de)
PIEZOELEKTRISCHER AKTUATOR UND AUFZEICHNUNGSKOPF
Title (fr)
ACTIONNEUR PIÉZOÉLECTRIQUE ET TÊTE D'ENREGISTREMENT
Publication
Application
Priority
EP 15160352 A 20150323
Abstract (en)
[origin: EP3072693A1] There is provided a piezoelectric actuator configured to displace to project toward a pressure chamber so as to apply pressure to a liquid inside the pressure chamber, the piezoelectric actuator including: a vibration plate having a compressive stress; a piezoelectric layer having a pulling stress; and an individual electrode. The compressive stress of the vibration plate has a magnitude which is not less than a threshold value at which an extreme point is generated in a relationship between a compliance of the piezoelectric actuator and a displacement volume of the pressure chamber in a case that an electric voltage is applied to the piezoelectric actuator, the displacement volume converting from increasing to decreasing relative to increase in the compliance at the extreme point; and the thickness of the piezoelectric actuator is not less than a first thickness corresponding to a compliance allowing the extreme point to generate.
IPC 8 full level
B41J 2/14 (2006.01)
CPC (source: EP)
B41J 2/14233 (2013.01); B41J 2202/11 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 15160352 A 20150323