Patent ID: 7036903

Claim:
An inkjet printer comprising: a printing head having a plurality of nozzles and a plurality of nozzle driving units corresponding to the nozzles through which ink is ejected, and receiving a driving power supply from an external power source; a nozzle failure detecting unit detecting a voltage level of the driving power supply during printing where respective nozzle driving units are driven, and outputting a failure checking signal regarding one of the nozzle driving units according to a result of comparing the voltage level of the driving power supply with a reference voltage; a display displaying a failure checking signal regarding the one of the nozzle driving units; and a control unit displaying on the display an identifier representing a corresponding one of the nozzle driving units whose failure is detected through the nozzle failure detecting unit, in response to the failure checking signal, the identifier being displayed before failure checking signals regarding all of the nozzle driving units are outputted.