Abstract: Provided is a drive method of a liquid discharging head including a first step of forming a first liquid column by supplying a drive signal having a first waveform to a drive element, and a second step of, when the first liquid column is formed, forming a second liquid column by supplying a drive signal having a second waveform to the drive element, and thereafter discharging a part or all of liquid constituting the second liquid column as a droplet, in which when a drive signal having the first waveform but not having the second waveform is supplied to the drive element, a droplet is not discharged from the discharging portion, and when a drive signal having the second waveform but not having the first waveform is supplied to the drive element, a droplet is not discharged from the discharging portion.

Abstract: Provided is a drive method of a liquid discharging head including a first step of forming a first liquid column by supplying a drive signal having a first waveform to a drive element, and a second step of, when the first liquid column is formed, forming a second liquid column by supplying a drive signal having a second waveform to the drive element, and thereafter discharging a part or all of liquid constituting the second liquid column as a droplet, in which when a drive signal having the first waveform but not having the second waveform is supplied to the drive element, a droplet is not discharged from the discharging portion, and when a drive signal having the second waveform but not having the first waveform is supplied to the drive element, a droplet is not discharged from the discharging portion.

Abstract: The first nozzle includes a first portion and a second portion. The second nozzle includes a third portion and a fourth portion. The capacity of the first portion is smaller than the capacity of the second portion. The capacity of the third portion is smaller than the capacity of the fourth portion. The capacity of the first portion is smaller than the capacity of the third portion. The length of the second portion in the X direction is greater than the length of the fourth portion in the X direction.

Abstract: A liquid ejecting head includes a plurality of nozzles arranged in a Y direction and ejecting liquid in a Z direction intersecting with the Y direction; and a plurality of nozzle flow passages each being continuous to corresponding one of the plurality of nozzles and extending in an X direction intersecting with the Y direction and with the Z direction, wherein each of the plurality of nozzles includes a first portion and a second portion, the second portion being located closer to the nozzle flow passage in the Z direction than the first portion is, capacity of the first portion is smaller than capacity of the second portion, and M2/M1<0.26, where M1 is inertance of the first portion, and M2 is inertance of the second portion.

Abstract: A liquid ejecting head includes: a first pressure chamber to which a first liquid is supplied; a first drive element that applies pressure to the first liquid in the first pressure chamber; a second pressure chamber to which a second liquid is supplied; a second drive element that applies pressure to the second liquid in the second pressure chamber; a nozzle channel which has one end communicating with the first pressure chamber and another end communicating with the second pressure chamber and in which the first liquid supplied from the first pressure chamber and the second liquid supplied from the second pressure chamber are mixed; and a nozzle that is provided in the nozzle channel and ejects a mixture of the first liquid and the second liquid.

Abstract: A communication plate in which are provided a first communication channel communicating with the first pressure chamber and the second pressure chamber and a first common liquid chamber communicating with the first pressure chamber and the second pressure chamber at positions different from positions at which the first communication channel communicates with the first pressure chamber and the second pressure chamber, and a nozzle substrate in which a first nozzle communicating with the first pressure chamber and the second pressure chamber in common via the first communication channel is provided. A second communication channel communicating with the first common liquid chamber and communicating with the first pressure chamber and the second pressure chamber in common is provided in the pressure chamber substrate or the communication plate.

Abstract: a first flow path communicating with the first common flow path, the liquid being supplied to the first common flow path through the first flow path; a second flow path communicating with the first common flow path more on one side in the first direction than the first flow path is, the liquid being collected from the first common flow path through the second common flow path; a third flow path communicating with the second common flow path, the liquid being supplied to the second common flow path through the third flow path; and a fourth flow path communicating with the second common flow path more on the other side in the first direction than the third flow path is, the liquid being collected from the second common flow path through the fourth flow path.

Abstract: The control portion controls (i) a discharging operation of discharging the liquid from the plurality of nozzles by driving the plurality of energy generation elements and (ii) a pressurization operation of pressurizing the liquid from the individual flow path side in a state in which the plurality of nozzles are sealed by the sealing portion.

Abstract: A liquid ejection head includes: a piezoelectric body; an vibration plate to be vibrated by a drive of the piezoelectric body; and a pressure chamber substrate including a pressure chamber which applies a pressure to a liquid by an vibration of the vibration plate; the pressure chamber substrate, the vibration plate, and the piezoelectric body are laminated in this order; and the vibration plate includes: a first layer containing silicon as a constituent element, a second layer which is disposed between the first layer and the piezoelectric body and which contains as a constituent element, a metal element selected from chromium, titanium, and aluminum, and a third layer which is disposed between the second layer and the piezoelectric body and which contains zirconium as a constituent element.

Abstract: When a first liquid containing the particles whose particle size average value is a first particle size is supplied to the liquid discharge head, the control device controls the circulation mechanism so that a circulation flow rate of the first liquid in the supply flow path, the nozzle flow path, and the discharge flow path is a first flow rate. When a second liquid containing the particles whose particle size average value is a second particle size larger than the first particle size is supplied to the liquid discharge head, the control device controls the circulation mechanism so that the circulation flow rate of the second liquid is a second flow rate lower than the first flow rate.

Abstract: A liquid ejecting head includes a plasma generator which includes a first electrode and a second electrode and in which an alternating voltage is applied to at least the first electrode to generate an atmospheric-pressure plasma around the first electrode. The atmospheric-pressure plasma accelerates the liquid ejected through the nozzle. The first electrode is disposed on a surface of the nozzle substrate in the ejection direction. The second electrode is disposed opposite the first electrode in the ejection direction.

Abstract: When a pressure of the liquid inside the common supply flow path is higher than a pressure of the liquid inside the pressure chamber, the adjustment portion changes the cross-sectional area to be a first cross-sectional area when a pressure difference, which is a difference between the pressure of the liquid inside the common supply flow path and the pressure of the liquid inside the pressure chamber, is a first pressure difference, and changes the cross-sectional area to be a second cross-sectional area larger than the first cross-sectional area when the pressure difference is a second pressure difference larger than the first pressure difference.

Abstract: A liquid ejecting head includes: a nozzle array including nozzles via which liquid is to be discharged and which are arrayed in a first direction; a nozzle passage that leads to a nozzle and extends in a second direction intersecting the first direction; a first pressure chamber; a second pressure chamber disposed adjacent to the first pressure chamber in the first direction; a first communicating passage via which the first pressure chamber communicates with an interior of the nozzle passage and which extends in a third direction orthogonal to the first and second directions; and a second communicating passage via which the second pressure chamber communicates with the interior of the nozzle passage and which extends in the third direction. As viewed from the second direction, an inner wall surface of the first communicating passage positioned on a side of the second communicating passage includes a first inclined surface that extends in a fourth direction intersecting the first and third directions.

Abstract: 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.

Abstract: A liquid discharge head including a diaphragm, a pressure chamber substrate that is laminated on the diaphragm, and a piezoelectric element that includes a first active portion and a second active portion, and is laminated on the diaphragm, in which when a direction in which the first active portion and the second active portion are arranged is defined as a second direction when viewed in a lamination direction, and a direction orthogonal to the lamination direction and the second direction is defined as a third direction, and the piezoelectric element includes a first region which is a region in which both the first active portion and the second active portion are provided, and a second region which is a region in which one of the first active portion and the second active portion is provided and the other is not provided.

Abstract: A liquid ejecting apparatus comprises a liquid ejecting head having a drive element that is driven in accordance with a drive signal to eject liquid droplets from a nozzle. The drive signal comprises a first drive waveform including a first contraction waveform to eject a first liquid droplet and a second drive waveform including a second contraction waveform to eject a second liquid droplet which merges with the first liquid droplet before the first liquid droplet lands onto a medium. The first contraction waveform includes a first segment waveform along which the potential changes, a second segment waveform along which the potential is kept, and a third segment waveform along which the potential changes. The second contraction waveform includes a fourth segment waveform along which the potential changes, a fifth segment waveform along which the potential is kept, and a sixth segment waveform along which the potential changes.

Abstract: A liquid ejecting apparatus includes a nozzle for ejecting a liquid, first to fourth pressure chambers communicating with the nozzle, first to fourth driving elements provided corresponding to each of the first to fourth pressure chambers, and a control section that controls the first to fourth driving elements. The control section is capable of executing a first ejection mode in which all of the first to fourth driving elements are driven to eject a liquid from the nozzle, and a second ejection mode in which only some driving elements among the first to fourth driving elements are driven to eject a liquid from the nozzle.

Abstract: A liquid discharge apparatus includes a pressure chamber substrate laminated on a first surface of a diaphragm and including a partition wall partitioning a pressure chamber communicating with a nozzle for discharging liquid, a piezoelectric element laminated on a second surface of the diaphragm and including a first active portion that overlaps a center of the pressure chamber when viewed in a thickness direction of the diaphragm and a second active portion that overlaps the pressure chamber at a position closer to an outer edge of the pressure chamber than the first active portion, and a drive signal generation portion that generates a drive signal, and a shrinkage step is executed in which a first period during which a first shrinkage element is supplied to the first active portion and a second period during which a second shrinkage element is supplied to the second active portion overlap.

Abstract: A liquid ejecting head includes: a nozzle; first to fourth pressure chambers; a communication flow path communicating between the nozzle and the first to fourth pressure chambers; first to fourth driving elements; a first common liquid chamber communicating with the first and the second pressure chambers; and a second common liquid chamber communicating with the third and the fourth pressure chambers. A first joining position from the first pressure chamber and the second pressure chamber to the nozzle is closer to end portions of the first pressure chamber and the second pressure chamber on a nozzle side than to the nozzle, and a second joining position from the third pressure chamber and the fourth pressure chamber to the nozzle is closer to end portions of the third pressure chamber and the fourth pressure chamber on the nozzle side than to the nozzle.

Abstract: A liquid ejecting head includes: a nozzle plate including a first-nozzle; first and second pressure chambers arranged side by side in a first-direction; third and fourth pressure chambers arranged side by side in the first-direction; a first-communication-flow-path extending along the nozzle plate, coupled to the first-nozzle, and communicating with the first to fourth pressure chambers; a first-common-liquid-chamber communicating with the first and second pressure chambers; and a second-common-liquid-chamber communicating with the third and fourth pressure chambers. The first and second pressure chambers and the third and fourth pressure chambers are shifted in a second-direction orthogonal to the first-direction.