Patent ID: 7104622

Claim:
A head driving device, which drives a plurality of pressure generating elements for generating pressure fluctuation in a jetted object contained in each of associated pressure chambers formed in a jetting head of a jetting apparatus to eject the jetted object from each of nozzles communicating with the associated pressure chambers, the head driving device comprising: a head driver, which generates a drive signal which is selectively applied to at least one of the pressure generating elements to be driven; a bias potential provider, which applies a bias potential to respective groundside electrodes of the pressure generating elements; an IC package, in which the head driver and the bias potential provider are provided; a first digital/analog converter, which converts a first digital signal inputted to the head driver into a first analog signal; and a second digital/analog converter, which converts a second digital signal inputted to the bias potential provider into a second analog signal, wherein the drive signal is selectively applied to the at least one of the pressure generating elements in accordance with the first analog signal; and wherein the bias potential is applied to the respective ground-side electrodes of the pressure generating elements in accordance with the second analog signal.