Patent ID: 8864263

Claim:
An inkjet recording device, comprising: a recording head which includes a nozzle, a pressure chamber communicating with the nozzle, and a pressure generation unit for applying pressure to ink in the pressure chamber, and ejects an ink droplet from the nozzle by the pressure applied to the ink by the pressure generation unit in response to a drive waveform signal applied to the pressure generation unit; and a drive waveform signal generation unit which generates the drive waveform signal for causing the recording head to eject zero to two ink droplets to one pixel, the drive waveform signal including an ejection pulse for ejecting one ink droplet and a cancel pulse for suppressing influence of reverberating vibration caused by the ejection pulse, wherein when causing the recording head to eject one ink droplet to one pixel, the drive waveform signal generation unit generates a first drive waveform signal which includes, in one pixel period, a first ejection pulse having a pulse width equal to AL which is a half period of a natural oscillation period of the pressure chamber, and a first cancel pulse being applied after 2 AL from finishing time of the first ejection pulse and having the same polarity as the first ejection pulse, and when causing the recording head to eject two ink droplets to one pixel, the drive waveform signal generation unit generates a second drive waveform signal which includes, in one pixel period, a second ejection pulse having a pulse width equal to AL, a third ejection pulse being applied after AL from finishing time of the second ejection pulse and having a pulse width equal to AL, and a second cancel pulse being applied from finishing time of the third ejection pulse and having the same polarity as the third ejection pulse, and a voltage V 1 of each of the ejection pulses and a voltage V 2 of the second cancel pulse satisfy a relationship V 1 >V 2 , and the voltage V 1 of each of the ejection pulses and a voltage V 3 of the first cancel pulse satisfy a relationship V 1 >V 3 .