Patent ID: 9469105
Filing Date: 2016-10-18
CPC Classification: B41J

Claim Text:
1. A liquid droplet ejecting device comprising: multiple pressure chambers communicating with multiple nozzles, to contain liquid; a vibration plate, to constitute elastic walls of the pressure chambers, disposed extending along the pressure chambers; multiple pressure generating elements disposed facing the multiple chambers respectively via the vibration plate; a drive waveform generator to generate drive waveform data that indicates a shape of a drive waveform for driving the multiple pressure generating elements; a residual vibration detector to detect a residual vibration waveform occurring within the pressure chamber after the pressure generating elements are driven; and a controller to determine the necessity of liquid-state recovery ejection for discharging thickened liquid, based on the detected residual vibration, and to cause the liquid-state recovery ejection to be performed upon determining that liquid-state recovery ejection is needed; wherein the necessity of the liquid-state recovery ejection is determined for each nozzle; wherein the drive waveform data is selected from a plurality of the drive waveform data based on an output of the residual vibration detector, the drive waveform data is selected for the nozzle for which it is determined that the liquid-state recovery ejection is needed; and wherein the pressure generating elements are driven based on the selected drive waveform data.