Ink jet recording apparatus with density control function

An ink jet recording apparatus comprising:

• an ink jet head which includes a plurality of ink nozzles, a plurality of air nozzles each disposed in opposite relation with each of said ink nozzles, means for discharging air flow from said air nozzles and means for applying an electric field between said air nozzles and ink in said ink nozzles;
• density determining means for determining a recording density at every ink nozzle of said plurality of ink nozzles and generating a density information signal;
• and
• control means responsive to said density determining means and having memory means storing a plurality of density-to-signal characteristics each being predetermined to correspond to said plurality of ink nozzles and each representing the relation between the recording density and an ink ejecting signal to be applied to one of said ink nozzles, for selecting a characteristic from said density-to-signal characteristics at every ink nozzle and generating said ink ejecting signal indicative of an ink ejecting amount determined on the basis of said density information signal from said density determining means in accordance with the selected density-to-signal characteristic, said ink ejecting signal being applied to the electric field applying means;
• wherein said ink ejecting signal is a pulse signal having a constant amplitude and a pulse width designated on the basis of said density information signal in accordance with the selected density signal characteristic.