Patent ID: 7926902

Claim:
A droplet ejecting device comprising: a channel unit formed with at least one nozzle that eject a liquid droplet and with at least one liquid channel in communication with the at least one nozzle, the at least one liquid channel having a channel area larger than the at least one nozzle, the channel unit comprising: a nozzle plate formed with the at least one nozzle and including a piezoelectric section, the nozzle plate having a first surface and a second surface opposite the first surface; a channel structure member fixed to the nozzle plate and formed with the at least one liquid channel; a first electrode provided on the first surface, at least part of the first electrode being arranged in a nozzle peripheral region of the at least one nozzle; and a second electrode provided on the second surface, at least part of the second electrode being arranged in the nozzle peripheral region of the at least one nozzle; an energy applying section that applies ejection energy to liquid in the at least one liquid channel; and an ejection-state determining section that determines whether an ejection state of a droplet is normal for the at least one nozzle, based on a potential difference between the first electrode and the second electrode when the energy applying section applies the ejection energy to the liquid in the at least one liquid channel.