A distance between the first circuit and the second circuit is a first distance, a distance between the first circuit and the temperature detection circuit is a second distance longer than the first distance, and a distance between the second circuit and the temperature detection circuit is a third distance longer than the first distance.

A liquid discharging head includes a stacked body in which plates are adhered to each other by an adhesive. The stacked body is provided with: individual channels including nozzles and pressure chambers, respectively, and aligned in a predetermined aligning direction, the pressure chambers being configured to be pressurized to discharge liquid from the nozzles; a supply manifold being communicated with the individual channels and supplying the liquid to the individual channels; a return manifold being communicating with the individual channels and configured to allow the liquid, which flows in the individual channels and which is not discharged from the nozzles, to flow therethrough; and a dummy channel arranged side by side with the individual channels in the aligning direction. The dummy channel is positioned at outside with respect to an outermost individual channel in the aligning direction.

A head includes: a head unit; and a wiring film configured to be connected to the head unit. The wiring film includes: a flexible substrate; a first IC provided on the flexible substrate; a second IC provided on the flexible substrate; a first wire provided on the flexible substrate to connect the first IC and a first contact portion of the head unit; a second wire provided on the flexible substrate to connect the second IC and a second contact portion of the head unit; and a third wire provided on the flexible substrate. The first IC has a long side extended in a predetermined direction and connected to the first wire, the second IC has a long side extended in the predetermined direction and connected to the second wire, and the first IC and the second IC are aligned along the predetermined direction to be apart from each other.

A liquid discharge head includes: a first pressure chamber group formed by pressure chambers arranged in a first direction; a second pressure chamber group formed by pressure chambers arranged in the first direction, and disposed side by side with the first pressure chamber group in a second direction; a first common channel extending in the first direction and communicating with the pressure chambers composing the first pressure chamber group; a second common channel extending in the first direction and communicating with the pressure chambers composing the second pressure chamber group; a first dummy pressure chamber disposed on one side in the first direction relative to the first pressure chamber group; and a second dummy pressure chamber disposed on the one side in the first direction relative to the second pressure chamber group.

There is provided a head module in which a first direction is a main scanning direction, including: a first nozzle row including a first nozzle; a second nozzle row including a second nozzle; and a third nozzle row including a third nozzle, in which a distance P1 between the first nozzle row and the second nozzle row in the first direction and a distance P2 between the first nozzle row and the third nozzle row in the first direction are expressed as P1:P2=E1:O1 where a value E1 is a positive even number and a value O1 is a positive odd number satisfying O1>E1.

A liquid discharging head includes: individual channels aligned in a first direction; and a first common channel and a second common channel extending in the first direction. Each of the individual channels includes a nozzle, a first pressure chamber and second pressure chamber arranged side by side in the first direction, and a connecting channel connecting the nozzle, the first pressure chamber and the second pressure chamber to one another. A first actuator and a second actuator are provided on the first pressure chamber and the second pressure chamber, respectively. The first common channel communicates with the first and second pressure chambers; and the second common channel communicates with the connecting channel.

A liquid ejecting head including: an individual flow path row in which a plurality of individual flow paths communicating with a nozzle that ejects a liquid in a first axis direction are arranged in parallel along a second axis orthogonal to a first axis, and a first common liquid chamber communicating with the plurality of individual flow paths, in which each of the plurality of individual flow paths has a pressure chamber that stores a liquid.

There is provided a liquid discharge head, including: a pressure chamber connected to a nozzle from which a liquid is discharged; an actuator configured to apply discharge pressure to the liquid in the pressure chamber; a first supply channel which is connected to the pressure chamber, and through which a first liquid is supplied to the pressure chamber; a second supply channel, different from the first channel, which is connected to the pressure chamber, and through which a second liquid different from the first liquid is supplied to the pressure chamber; a first valve which is disposed in the first supply channel, and by which the first supply channel is opened and closed; and a second valve which is disposed in the second supply channel, and by which the second supply channel is opened and closed.

A liquid ejecting head includes nozzles configured to eject liquid, pressure chambers communicating with the nozzles, the pressure chambers being configured to generate pressure for ejecting the liquid, a first liquid chamber configured to store the liquid to be supplied to the pressure chambers, a second liquid chamber configured to store the liquid that passed through the pressure chambers, first communication paths communicating with the pressure chambers from the first liquid chamber, second communication paths respectively communicating with the second liquid chamber from between the pressure chambers and the nozzles in which flow path resistance in the first communication paths is higher than flow path resistance in the second communication paths.

An inkjet head includes a pressure chamber storing ink, a nozzle communicating with the chamber, an actuator ejecting the ink through the nozzle by changing a volume of the chamber, and a circuit outputting a drive signal to the actuator with a drive waveform having a cycle based on a number of gradation levels being used for printing. When printing is performed using three or more gradation levels, the circuit outputs the signal that has a multi-drop drive waveform including two or more first waveforms for ejecting first to (n−1)-th droplets of the ink where n is equal to or greater than 3, a second waveform for ejecting an n-th droplet of the ink, and an intermediate time between the first waveform for ejecting the (n−1)-th droplet and the second waveform for ejecting the n-th droplet. The intermediate time is longer than a time between two adjacent first waveforms.