Patent ID: 9669620
Date: 2017-06-06
CPC Classifications: B41J

Claim:
1. A liquid droplet ejecting device comprising: a liquid droplet ejecting head including a nozzle, a pressure chamber that accommodates liquid and is in communication with the nozzle, and a piezoelectric element that is arranged to face the pressure chamber; a drive waveform generation unit configured to generate a drive waveform for driving the piezoelectric element, the drive waveform having a potential that varies with respect to a reference potential; wherein the reference potential is for a holding waveform which holds the piezoelectric element at a predetermined reference voltage prior to or subsequent to applying a waveform which expands or contracts the piezoelectric element; a detection unit configured to detect a relationship between a detected potential of a residual oscillation waveform that is generated within the pressure chamber after driving the piezoelectric element and a first threshold corresponding to a potential higher than the reference potential of the drive waveform; and a state determination unit configured to determine whether at least one of the nozzle and the pressure chamber is in an abnormal state based on the detected relationship between the detected potential of the residual oscillation waveform and the first threshold.