Liquid ejecting apparatus and method for controlling liquid ejecting apparatus

A liquid ejecting apparatus comprising:

• a liquid ejecting head that includes a plurality of individual flow paths including respective pressure chambers communicating with nozzles for ejecting liquid, a first common flow path commonly coupled to one ends of the plurality of individual flow paths, and a second common flow path commonly coupled to the other ends of the plurality of individual flow paths;
• a pressurizing mechanism that performs a pressurization operation for supplying the liquid to the first common flow path;
• a depressurizing mechanism that performs a depressurization operation for discharging the liquid from the second common flow path;
• and
• a mode controller that controls execution of a plurality of modes including a first mode in which an operation of the liquid ejecting head is controlled under pressurization at first pressure by the pressurizing mechanism and depressurization at second pressure by the depressurizing mechanism and a second mode in which the operation of the liquid ejecting head is controlled under pressurization at third pressure by the pressurizing mechanism and depressurization at fourth pressure by the depressurizing mechanism, wherein
• to switch from the execution of the first mode to the execution of the second mode, the mode controller gradually changes, from the first pressure to the third pressure, pressure at which the pressurization operation is performed by the pressurizing mechanism, and gradually changes, from the second pressure to the fourth pressure, pressure at which the depressurization operation is performed by the depressurizing mechanism,
• the first mode is an air bubble discharge operation for discharging an air bubble within the liquid ejecting head,
• the second mode is a printing operation for performing printing by ejecting the liquid from the liquid ejecting head,
• the third pressure is lower than the first pressure, and
• the fourth pressure is higher than the second pressure.

A liquid ejecting apparatus comprising:

• a liquid ejecting head that includes a plurality of individual flow paths including respective pressure chambers communicating with nozzles for ejecting liquid, a first common flow path commonly coupled to one ends of the plurality of individual flow paths, and a second common flow path commonly coupled to the other ends of the plurality of individual flow paths;
• a pressurizing mechanism that performs a pressurization operation for supplying the liquid to the first common flow path;
• a depressurizing mechanism that performs a depressurization operation for discharging the liquid from the second common flow path;
• and
• a mode controller that controls execution of a plurality of modes including a first mode in which an operation of the liquid ejecting head is controlled under pressurization at first pressure by the pressurizing mechanism and depressurization at second pressure by the depressurizing mechanism and a second mode in which the operation of the liquid ejecting head is controlled under pressurization at third pressure by the pressurizing mechanism and depressurization at fourth pressure by the depressurizing mechanism, wherein
• to switch from the execution of the first mode to the execution of the second mode, the mode controller gradually changes, from the first pressure to the third pressure, pressure at which the pressurization operation is performed by the pressurizing mechanism, and gradually changes, from the second pressure to the fourth pressure, pressure at which the depressurization operation is performed by the depressurizing mechanism, and
• to switch from the execution of the first mode to the execution of the second mode, the mode controller controls the pressurization operation by the pressurizing mechanism and the depressurization operation by the depressurizing mechanism such that pressure in the individual flow paths in a vicinity of the nozzles is negative.