Patent ID: 7318634

Claim:
An apparatus of driving an ink jet printer for manufacturing a display device, comprising: a timing control unit outputting a timing control signal by receiving a prescribed signal (IN) inputted from outside; a head drive unit receiving the timing control signal outputted from the timing control unit and a prescribed drive voltage (Vh), the head drive unit outputting a drive pulse of a predetermined voltage level; and an array resistor outputting a head drive voltage to each of a plurality of piezos included in a plurality of heads by receiving the drive pulse outputted from the head drive unit, wherein the head drive voltage outputted from the array resistor maintains a predefined voltage value, wherein the head drive unit includes a plurality of drive pulse applying units, and wherein each of the drive pulse applying units generates a prescribed constant current by detecting a pulse of the drive voltage inputted to a respective piezo and applies the prescribed drive voltage (V h ) and a drive pulse having the prescribed constant current to the respective piezo via the resistor based on the received timing control signal.