LIQUID DISCHARGE DEVICE AND CONTROL METHOD OF LIQUID DISCHARGE HEAD

To suppress mist from being generated.SOLUTION: A driving signal for a driving element includes a first driving waveform including a first contraction waveform whose potential changes from a first potential to a second potential so that volumes of a pressure chamber are contracted, and a second driving waveform including a second contraction waveform whose potential changes from the first potential to the second potential so that the volumes of the pressure chamber are contracted. The first contraction waveform includes a first partial waveform whose potential changes from the first potential to a first intermediate potential, a second partial waveform whose potential is kept at the first intermediate potential and a third partial waveform whose potential changes from the first intermediate potential to the second potential. The second contraction waveform includes a fourth partial waveform whose potential changes from the first potential to a second intermediate potential, a fifth partial waveform whose potential is kept at the second intermediate potential and a sixth partial waveform whose potential changes from the second intermediate potential to the second potential. The driving element makes a nozzle discharge first liquid droplets in accordance with the first driving waveform, and makes the nozzle discharge second liquid droplets in accordance with the second driving waveform, so that the second liquid droplets unite with the first liquid droplets before the first liquid droplets impact in a medium.SELECTED DRAWING: Figure 6 【課題】ミストの発生を抑制する。【解決手段】駆動素子の動信号は、圧力室の容積を収縮させるように電位が第１電位から第２電位に変化する第１収縮波形を含む第１駆動波形と、圧力室の容積を収縮させるように電位が第１電位から第２電位に変化する第２収縮波形を含む第２駆動波形とを含み、第１収縮波形は、電位が第１電位から第１中間電位に変化する第１部分波形と電位が第１中間電位に維持される第２部分波形と電位が第１中間電位から第２電位に変化する第３部分波形とを含み、第２収縮波形は、電位が第１電位から第２中間電位に変化する第４部分波形と電位が第２中間電位に維持される第５部分波形と電位が第２中間電位から第２電位に変化する第６部分波形とを含み、駆動素子は、第１駆動波形に応じてノズルから第１の液滴を吐出し、第２駆動波形に応じてノズルから第２の液滴を、第１の液滴が媒体に着弾する前に第１の液滴に合体するように、吐出する。【選択図】図６