Patent ID: 7690742

Claim:
An inkjet printer head driving apparatus having a plurality of heating elements and nozzles, comprising: a switching unit to turn on and off each of the heating elements to heat ink corresponding to selected nozzles to eject the ink; a level shift unit having a level converter to convert a potential level of a signal input therein into a predetermined potential level to drive the switching unit, and a transient time extending part comprising: a first inverter to invert the signal output from the level converter, and a second inverter including at least two time extending elements to extend the inverted signal output from the first inverter by a transient time of the output potential level of the signal input from the level converter to the switching unit during which the potential level of the signal input from the level converter to the switching unit is converted from a first signal level to a second signal level and vice versa; and a control unit to receive an external data signal, decode the received data signal, and output the decoded data signal as a nozzle selection signal to the level shift unit to select the selected nozzles corresponding to a to-be-recorded image from the nozzles.