Patent ID: 8197020

Claim:
An image forming method for use in an inkjet head including a pressure chamber filled with ink, a nozzle which communicates with the pressure chamber and in which a meniscus of the ink is formed, a piezoelectric element which pressurizes the pressure chamber, and a drive circuit which performs an operation of ejecting the ink in a printing state and generates a basic pulse for vibrating the meniscus in a non-printing state, the basic pulse being generated by turning off a voltage applied to the piezoelectric element for substantially the same period as a natural vibration period of the ink, the image forming method comprising the step of: generating an additional pulse at least once before or after the basic pulse when the basic pulse is generated by the drive circuit in the non-printing state, the additional pulse being generated by turning off the voltage applied to the piezoelectric element; wherein the additional pulse has a pulse width corresponding to a period that is substantially equal to a rising period of a fluctuating voltage generated by the basic pulse.