Patent ID: 7399042

Claim:
A head driving device of a liquid ejecting apparatus, comprising: a pressure generating element; a bias voltage applying unit operable to apply a bias voltage to the pressure generating element; a driving voltage generating unit operable to convert a digital signal into an analog signal and amplify the analog signal to generate and output a driving voltage to the pressure generating element for ejecting a liquid droplet from a nozzle of a liquid ejecting head; and a cutoff unit operable to cut off the bias voltage applied to the pressure generating element based on a drive stopping signal, wherein when the drive stopping signal is input to the bias voltage applying unit and the driving voltage generating unit in synchronism, the driving voltage generating unit stops generating the driving voltage and the cutoff unit cuts of the bias voltage in synchronization with the drive stopping signal, so as to put the liquid ejecting apparatus into a standby state, wherein the bias voltage applying unit is supplied with a power from a first power source for charging, and wherein a voltage of the first power source is lower than a voltage of a second power source for supplying a power to the driving voltage generating unit for charging.