Patent attributes
An inkjet head driving apparatus which drives an inkjet head for use in gradation printing which is performed to cause a capacity of each of a plurality of pressure chambers filled with ink to be changed by a drive pulse applied to an actuator, an ink drop to be emitted onto a recording medium from a nozzle communicating with the corresponding pressure chamber, and the number of ink drops emitted to be controlled according to the number of drive pulses, the driving apparatus including a drive signal generating section which applies a deboost pulse to decrease pressure in the pressure chamber before the drive pulse for emitting a first drop of ink is applied, wherein the deboost pulse includes a pulse applied to expand or contract the capacity of the pressure chamber for a predetermined length of time, and a quiescent time following the pulse.
