Patent ID: 8308258
Filing Date: 2012-11-13
Classification: B41J

Abstract:
1. A liquid droplet jetting apparatus which jets liquid droplets, the apparatus comprising: a liquid droplet jetting head which has a nozzle for jetting the liquid droplets; and a jetting controller which controls the liquid droplet jetting head to jet the liquid droplets from the nozzle by supplying the liquid droplet jetting head with a driving signal having a predetermined drive waveform in each of continuing driving periods, and which includes: a driving waveform selecting section which selects, with respect to each of the continuing driving periods, one driving waveform from a plurality of driving waveforms each having a wavelength which is same as a length of one driving period; and a driving waveform shifting section which shifts the driving waveform, selected by the driving waveform selecting section with respect to one driving period among the continuing driving periods, to another driving period which is before the one driving period based on a type of the driving waveform, wherein the driving waveforms have at least three types of driving waveforms which include a first driving waveform having at least one driving pulse for jetting the liquid droplets, a second driving waveform having driving pulses more than the first driving waveform for jetting the liquid droplets more than the first driving waveform, and a non-jetting waveform having no drive pulse, and when the driving waveform selecting section selects the second driving waveform with respect to the one driving period, the driving waveform shifting section shifts the second driving waveform from the one driving period to the another driving period which is before the one driving period.