LIQUID EJECTION DEVICE

To provide a liquid ejection device in which heat radiation measures of a driving signal output circuit is improved.SOLUTION: The liquid ejection device comprises: an ejection unit which is supplied with a driving signal to eject liquid; a driving signal output unit which outputs the driving signal; a cooling unit which cools the driving signal output unit; and an electric power supply unit which supplies the cooling unit with electric power, the driving signal output unit has a first mode in which the driving signal output unit outputs, as the driving signal, a first driving signal of a first frequency to the ejection unit and a second mode in which the driving signal output unit outputs, as the driving signal, a second driving signal of a second frequency lower than the first frequency to the ejection unit, wherein electric energy supplied by the electric power supply unit to the cooling unit in the first mode is more than electric energy supplied by the electric power supply unit to the cooling unit in the second mode.SELECTED DRAWING: Figure 22 【課題】駆動信号出力回路の放熱対策を改善した液体吐出装置を提供すること。【解決手段】駆動信号が供給されることで液体を吐出する吐出部と、記駆動信号を出力する駆動信号出力部と、駆動信号出力部を冷却する冷却部と、冷却部に電力を供給する電力供給部と、を備え、駆動信号出力部が、第１周波数の第１駆動信号を駆動信号として吐出部に出力する第１モードと、駆動信号出力部が、第１周波数よりも低い第２周波数の第２駆動信号を駆動信号として吐出部に出力する第２モードと、を有し、第１モードにおいて電力供給部が冷却部に供給する電力量は、第２モードにおいて電力供給部が冷却部に供給する電力量よりも多い、液体吐出装置。【選択図】図２２