Patent ID: 8210630
Filing Date: 2012-07-03
Classification: B41J

Abstract:
1. A method for driving a liquid ejector, comprising: applying a first voltage to a piezoelectric deformation region of a piezoelectric material layer for enlarging a volume of a pressurizing chamber, the piezoelectric deformation region being arranged correspondingly to the pressurizing chamber; applying a second voltage to the piezoelectric deformation region, the second voltage being an opposite polarity to the first voltage, for reducing the volume of the pressurizing chamber; and ejecting the liquid from the pressurizing chamber as a liquid droplet, wherein the liquid ejector comprises a substrate that is formed with a liquid droplet ejecting portion and a piezoelectric actuator, wherein the piezoelectric actuator comprises at least one said piezoelectric material layer, wherein the substrate comprises the pressurizing chamber to be filled with a liquid and a nozzle communicating with the pressurizing chamber, and wherein an area of a first P-E hysteresis loop showing the relation between an intensity of an electric field E (kV/cm) and a polarization P (μC/cm