Patent ID: 8622499
Filing Date: 2014-01-07
Classification: B41J

Abstract:
1. A liquid ejection apparatus, comprising: a plurality of nozzles each of which is configured to serve as an ejection port from which a droplet of liquid is ejected; a plurality of pressure generating elements which are arranged correspondingly to the nozzles, each of the pressure generating elements being configured to generate ejection energy to eject the droplet from a corresponding one of the nozzles; a circuit control device including a plurality of switches of which first ends are connected respectively to the pressure generating elements corresponding to the nozzles; a voltage waveform generating device configured to generate a voltage waveform to be supplied to second ends of the switches of which the first ends are connected to the pressure generating elements; and a switch control device which outputs a control signal to cause each of the switches to close and open, wherein the voltage waveform generated by the voltage waveform generating device has a waveform such that, when one of the switches is caused to close and open according to the control signal so that a portion of the voltage waveform is applied to one of the pressure generating elements connected to the one of the switches, a droplet of the liquid is ejected from one of the nozzles corresponding to the one of the pressure generating elements to which the portion of the voltage waveform has been applied, whereas when a whole of the voltage waveform is applied to the one of the pressure generating elements, no droplet of the liquid is substantially ejected from the one of the nozzles corresponding to the one of the pressure generating elements to which the whole of the voltage waveform has been applied.