Patent attributes
An ink droplet detection apparatus containing: a plurality of nozzle lines each containing multiple nozzles which eject ink droplets; a beam radiator for radiating a detection beam so as to cross a path of the ink droplets and forming a light path of the detection beam so as to be along two or more the nozzle lines being detected; two or more beam receivers corresponding to the nozzle lines being detected for receiving the beam radiated from the beam radiator and detecting a droplet ejected from the nozzle by determining whether the ink droplet ejected from each nozzle intercepts the light path or not; an ejecting control circuit for controlling the nozzles so as that the ink droplets are ejected from each nozzle; and a controller for controlling the ejecting control circuit by sending the ejecting control circuit the same ejecting start signals for each nozzle lines being detected so as that the ejecting timing of the ink droplets to be ejected from each nozzle of the plurality of the nozzle lines being detected is synchronized.
