Patent ID: 6672700
Filing Date: 2004-01-06
Classification: B41J

Abstract:
An ink jet recording apparatus, comprising:a recording head, including a nozzle orifice, a pressure chamber communicated with the nozzle orifice, and an actuator which varies a volume of the pressure chamber; a drive signal generator, which generates a drive signal in which a plurality of drive pulses are arranged within a unit recording period, the drive pulses including at least a first drive pulse composed of: an expanding element, which drives the actuator so as to expand the pressure chamber; an expansion holding element, which drives the actuator such that the expanded state of the pressure chamber is held in a first time period roughly equal to a first natural vibration period which is a natural vibration period of ink stored in the pressure chamber; and an ejecting element, which drives the actuator so as to contract the pressure chamber so that the ink in the pressure chamber is ejected from the nozzle orifice; and a pulse supplier, which selects at least one drive pulse from the drive signal and supplies the selected drive pulse to the actuator, wherein the second time period in which the expanding element is supplied is approximately equal to the first natural vibration period.