Patent ID: 7252354
Filing Date: 2007-08-07
Classification: B41J

Abstract:
1. A liquid-ejecting apparatus comprising: a piezoelectric body; and a pressure chamber that changes volume and thus ejects liquid through application of voltage to the piezoelectric body, wherein a driving waveform applied to said piezoelectric body during the liquid ejecting operation based on signals output from a control unit, comprises a high potential period in which a voltage exhibiting an electric field strength exceeding the coercive electric field of said piezoelectric body is applied, and a reverse potential period in which a voltage such that the potential becomes of the opposite polarity to the polarity in said high potential period or the potential becomes zero is applied, wherein the voltage applied in said reverse potential period is a voltage exhibiting an electric field strength of at least the coercive electric field of said piezoelectric body, and wherein the time period between when the absolute value of the voltage applied in said reverse potential period starts to drop from a maximum value and when the absolute value of the voltage applied in said high potential period reaches approximately a maximum is not more than 2 μs.