Patent ID: 8794931

Claim:
A fluid ejection device comprising: a pulse generation unit that changes the volume of a fluid chamber using a volume changing section to eject pulsating flow; a fluid supply unit including a pump chamber and a pump chamber volume changing section that cycles the volume of the pump chamber between a first volume and a second volume to supply the fluid to the pulse generation unit; a drive control unit that inputs a pulsating flow drive signal for driving the pulse generation unit and inputs a fluid supply drive signal for driving the fluid supply unit; and an operation command input unit that inputs an operation command to the drive control unit, wherein the fluid supply drive signal and the pulsating flow drive signal are input in conjunction with the input of the operation command, wherein the drive control unit is configured to drive the pump chamber volume changing section using the fluid supply drive signal such that: the pump chamber volume changing section decreases the volume of the pump chamber toward the first volume until the volume of the pump chamber reaches the first volume when the operation command is input, the pump chamber volume changing section increases the volume of the pump chamber towards the second volume when the volume of the pump chamber has reached the first volume and the operation command is input, and the pump chamber volume changing section increases the volume of the pump chamber towards the second volume when the operation command is not input.