Patent ID: 8764145

Claim:
An inkjet recording apparatus comprising: an ink particle generation unit that makes a pressurized ink injected from a nozzle that is vibrated at a constant cycle into particles at a constant cycle; a charging unit that applies a charging signal in synchronization with the cycle of particulation based on character information for printing, and electrically charges an ink particle of those subjected to particulation, which corresponds to a dot to be printed; a polarizing unit that polarizes the electrically charged ink particle in a polarizing electric field; a collection unit that allows a gutter to collect the ink particle corresponding to the dot that is not printed; and a character forming unit that forms a character as a dot matrix on a printing object by relatively moving the printing object in a substantially vertical direction to the polarizing direction of the ink particle, wherein a phase detection charging signal is applied to the ink particle that is not used for printing when forming the dot matrix character so as to detect an optimum charging timing in a process of forming the dot matrix character.