Patent ID: 9033443
Filing Date: 2015-05-19
Classification: B41J

Abstract:
1. A liquid ejection apparatus comprising: a liquid ejection head that includes a plurality of nozzle groups each including at least one row of plural nozzles, and a plurality of pressure generation units each causing a pressure variation of liquid inside a pressure chamber communicated with a corresponding one of the nozzles, and that causes the pressure generation unit to eject the liquid through the corresponding one of the nozzles; a first control unit that outputs a plurality of drive signals each including a series of at least one drive waveform, each drive waveform being used for driving one of the pressure generation units, and outputs a plurality of selection control signals each being used for control of selecting one of the at least one drive waveform included in one of the drive signals; and a second control unit that controls the liquid ejection performed by the liquid ejection head on the basis of the drive signals outputted from the first control unit and the selection control signals outputted from the first control unit, wherein the first control unit outputs the plurality of drive signals, which includes the respective series of at least one drive waveforms, the generation timing points of which are different from one another, to the second control unit, and outputs a multiplexed control signal obtained by multiplexing the selection control signals, which correspond to the respective drive signals, to the second control unit, and wherein the second control unit includes a control signal demultiplexing unit which demultiplexes the multiplexed control signal into the selection control signals corresponding to the respective nozzle groups, and a drive waveform selection unit which, on the basis of each of the demultiplexed selection control signals, selects one of the at least one drive waveform included in one of the drive signals which corresponds to the each of the demultiplexed selection control signals, and applies the selected drive waveform to one of the pressure generation units which belongs to one of the nozzle groups which corresponds to the drive signal corresponding to the each of the demultiplexed selection control signals.