Patent ID: 8506584

Claim:
A fluid jet device comprising: a fluid chamber with a variable capacity; an entrance channel communicated with the fluid chamber; an exit channel communicated with the fluid chamber; a capacity varying section adapted to vary the capacity of the fluid chamber in response to supply of a drive signal; an opening section communicated with the exit channel; a pressure generation section adapted to supply the entrance channel with a fluid; and a drive signal supply section adapted to supply the capacity varying section with a drive signal including a compressing drive waveform section making the capacity varying section operate so as to compress the capacity of the fluid chamber and a restoring drive waveform section making the capacity varying section operate so as to restore the capacity of the fluid chamber before compressing the capacity in a signal waveform of one cycle; and a storage section adapted to store waveform information of the drive signal; wherein the drive signal supply section controls supply content of the drive signal so as to provide a restoring period adapted to restore a steady state of the fluid flowing toward an inside of the fluid chamber in a period from when the compressing drive waveform section in the drive signal is supplied to the capacity varying section to when a subsequent one of the compressing drive waveform section is supplied to the capacity varying section, and the drive signal supply section generates the drive signal based on the waveform information stored in the storage section, and supplies the capacity varying section with the drive signal.