A liquid droplet ejecting apparatus includes: a channel member; piezoelectric elements; and a controller. The channel member has a common channel, individual channels each communicating with one of nozzles. The individual channels include first to fourth individual channels, the common channel has first to fourth connection ports to which the first to fourth individual channels are connected, respectively. A distance between the first and second connection ports is different from a distance between the third and fourth connection ports. The controller drives first and third piezoelectric elements included in the piezoelectric elements and corresponding, respectively, to first and third nozzles included in the nozzles at a first timing, and drives second and fourth piezoelectric elements included in the piezoelectric elements and corresponding, respectively, to second and fourth nozzles included in the nozzles at a second timing delayed from the first timing by a predetermined amount of time.

A liquid ejecting head includes a nozzle, first and second pressure chambers communicating with the nozzle, a first driving element configured to change a pressure in the first pressure chamber, and a second driving element configured to change a pressure in the second pressure chamber. A first flow path length of a flow path from the first pressure chamber to the nozzle is shorter than a second flow path length of a flow path from the second pressure chamber to the nozzle. In a driving method of a liquid ejecting head, at least the first and second driving elements are driven to eject a liquid from the nozzle, and a driving timing of the second driving element is earlier than a driving timing of the first driving element.

A liquid ejection head comprising an ejection port for ejecting liquid; a pressure chamber in which pressure acts on the liquid ejected from the ejection port; a flow path communicating with the pressure chamber; a substrate forming the flow path; and an organic film for constituting a part of a wall surface of the flow path and suppressing vibration of the liquid in the flow path, wherein the organic film is adhered, with an adhesive, to the substrate, and the organic film and the adhesive are bonded through a siloxane bond.

A liquid ejecting apparatus includes a liquid ejecting head that includes a detection circuit which detects residual vibration of a diaphragm caused by driving of at least one of a first piezoelectric element and a second piezoelectric element corresponding to nozzles, and an evaluation control portion, in which the evaluation control portion causes the detection circuit to detect first residual vibration caused by driving the first piezoelectric element and the second piezoelectric element with a drive signal for ejecting an ink, from the first piezoelectric element, causes the detection circuit to detect second residual vibration caused by driving the first piezoelectric element with the drive signal and driving the second piezoelectric element with another drive signal for not ejecting the ink, from the first piezoelectric element, and evaluates crosstalk between the nozzles based on the first residual vibration and the second residual vibration detected by the detection circuit.

A fluid ejection apparatus includes a plurality of fluid ejectors. Each fluid ejector includes a pumping chamber, and an actuator configured to cause fluid to be ejected from the pumping chamber. The fluid ejection apparatus includes a feed channel fluidically connected to each pumping chamber; and at least one compliant structure formed in a surface of the feed channel. The at least one compliant structure has a lower compliance than the surface of the feed channel.

The waveform determining section causes the detection circuit to detect, as a first residual vibration, a residual vibration of the vibration plate after N piezoelectric elements corresponding to N nozzles among the plurality of nozzles are driven with an evaluation waveform in which a rate of change in an electrical potential is a first electrical potential change rate, and causes the detection circuit to detect, as a second residual vibration, a residual vibration of the vibration plate after the N piezoelectric elements are driven with an evaluation waveform in which the rate of change in the electrical potential is a second electrical potential change rate lower than the first electrical potential change rate, and determines a waveform of a drive signal based on the first residual vibration and the second residual vibration.

A liquid ejection substrate including a lamination of a support substrate, a first bonding member, a flexible member having a sheet-like shape, a second bonding member, and a channel substrate having a channel through which a liquid is guided to a nozzle, in which the support substrate has a depressed portion at a position corresponding to at least a part of the channel provided to the channel substrate, and the flexible member is disposed between the channel and the depressed portion, and the first bonding member and the second bonding member are in partial contact with each other.

A liquid discharge head includes a common liquid chamber having multiple liquid chambers communicating with each other through the common liquid chamber, a vibration film having multiple nozzles, multiple vibration generators, and a flexible member. The common liquid chamber stores a liquid. The multiple nozzles respectively communicate with the multiple liquid chambers. The multiple vibration generators individually vibrate the vibration film around the multiple nozzles, respectively. The flexible member is opposed to the multiple nozzles in the common liquid chamber. The flexible member is deformable by the liquid in the common liquid chamber vibrated by the vibration film.