Patent ID: 7537300
Filing Date: 2009-05-26
Classification: B41J

Abstract:
1. An inkjet printer comprising: an inkjet head having a piezoelectric actuator, a pressure chamber, and a nozzle; and a controller configured to apply a voltage to the piezoelectric actuator, wherein: the piezoelectric actuator forms a portion of a wall defining the pressure chamber; the piezoelectric actuator is configured to deform to project toward the pressure chamber and to change a volume of the pressure chamber while the controller applies the voltage to the piezoelectric actuator; the controller is configured to apply a first ink discharge signal and a second ink discharge signal to the piezoelectric actuator, each of the first ink discharge signal and the second ink discharge signal comprising: the controller is further configured to apply an additional signal to the piezoelectric actuator between the first ink discharge signal and the second ink discharge signal, the additional signal comprising: