Waveform generating device and ink jet recording apparatus

An ink jet recording apparatus, comprising:

• a nozzle plate having a nozzle;
• an actuator configured to change a pressure of a pressure chamber connected to the nozzle;
• and
• a head driver configured to apply a driving signal to an actuator to discharge ink from the pressure chamber connected to the nozzle, the driving signal including a first portion for reducing an ink pressure in the pressure chamber and a second portion for increasing the ink pressure in the pressure chamber, wherein
• the second portion is increased in potential by a first potential increase when ink pressure in the pressure chamber is at a maxima, and
• the second portion is further increased in potential by a second potential increase when the ink pressure of the pressure chamber is at a negative value after the first potential increase.