Patent ID: 8882234

Claim:
A liquid emission apparatus having a head provided with a plurality of nozzles which each emits liquid, the head being provided with a plurality of pressure chambers, each of the plurality of pressure chambers being linked to each of the nozzles, the head being provided with a plurality of driver elements, each of the plurality of driver elements being provided correspondingly to each of the pressure chambers, the liquid emission apparatus being configured to emit the liquid from the nozzles by applying a driving signal to the driver elements, the liquid emission apparatus being configured: to apply the driving signal to the driver elements so as to obtain a plurality of detected signals; to decide whether one of the nozzles corresponding to one of the driver elements is causing a malfunction in liquid emission on the basis of one of detected signals; to drive the one of the driver elements corresponding to the one of the nozzles again upon the malfunction in the liquid emission; to omit to drive the other of the driver elements corresponding to the other of nozzles that have no malfunction in the liquid emission, and to drive the same driver element more than once so as to obtain the detected signals, the liquid emission apparatus being further configured to decide a state of the nozzle corresponding to the same driver element on the basis of a variation in the respective detected signals.