Abstract: A liquid ejecting head includes: a first pressure chamber that applies pressure to a liquid; a second pressure chamber that applies pressure to the liquid; a nozzle channel that extends in a first direction and includes a nozzle that ejects the liquid; a first communication channel that extends in a second direction crossing the first direction and enables the first pressure chamber and the nozzle channel to communicate with each other; a second communication channel that extends in the second direction and enables the second pressure chamber and the nozzle channel to communicate with each other; and a first branch channel that has a portion extending in the first direction and enables the first pressure chamber and the nozzle channel to communicate with each other through a path different from a path of the first communication channel.

Abstract: A liquid discharge apparatus includes: a plurality of dischargers including a nozzle, a pressure chamber, and a drive element to discharge liquid in the pressure chamber through the nozzle; and a driver that generates, for each of the plurality of dischargers, an individual drive signal to drive the drive element based on a plurality of drive signals including a first drive signal having a first contraction waveform in which an electrical potential changes to cause a volume of the pressure chamber to contract, and a second drive signal having a second contraction waveform in which an electrical potential changes to cause the volume of the pressure chamber to contract. In one cycle, a center of one of a time period of the first contraction waveform and a time period of the second contraction waveform is located in the other of the time periods.

Abstract: A liquid ejection apparatus is configured to control a supply of a drive signal to a drive element by a controller so that a target period is either an ejection period or a non-ejection period based on print data. The drive signal includes an ejection pulse and a non-ejection pulse. The controller: does not supply the non-ejection pulse to the drive element when the target period is the non-ejection period and an elapsed time length from the last ejection period is less than the predetermined time length, and supplies the non-ejection pulse to the drive element when the target period is the non-ejection period and the elapsed time length is equal to or longer than the predetermined time length. The predetermined time length is an integral multiple or more of ½ of a natural vibration cycle of a meniscus of a liquid in the nozzle.

Abstract: The individual flow path includes a nozzle communicating with an outside, a first flow path, in the middle of which the nozzle is disposed and which extends in a first direction that is an in-plane direction of a nozzle surface of the nozzle plate in which the nozzle opens, a second flow path coupled to the first flow path and extending in a second direction other than the first direction, a third flow path coupled to the second flow path and extending in the third direction other than the second direction, and a pressure chamber which is disposed in the third flow path and in which a pressure change is induced by the energy generating element. A cross-sectional area of the first flow path is smaller than a cross-sectional area of the second flow path.

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: The communication plate has a first layer that defines a wall surface of the communication flow channel, a second layer stacked on a side of the first layer opposite to the wall surface, and a third layer stacked on a side of the second layer opposite to the first layer, and the thermal expansion coefficient of the second layer is smaller than the thermal expansion coefficient of the first layer and is smaller than the thermal expansion coefficient of the third layer.

Abstract: A width of the first nozzle channel in the first direction is larger than a width of the first communication channel in the second direction and a width of the first nozzle channel in a third direction intersecting the first direction and the second direction is smaller than a width of the first communication channel in the third direction.

Abstract: The second width is smaller than the first width and the fourth width is larger than the third width.

Abstract: A liquid ejecting head includes a first flow path extending in a first axial direction between a supply port and a discharge port, and a nozzle that is provided to branch from the first flow path and that discharges a liquid along a second axial direction orthogonal to the first axial direction. The nozzle includes a first nozzle portion in which a first opening for discharging the liquid is formed and a second nozzle portion in which a second opening that is a coupling port with the first flow path is formed, and a diameter r2 of the second opening in the first axial direction is larger than a diameter r1 of the first opening in the first axial direction.

Abstract: A liquid ejecting head includes: a first pressure chamber that applies pressure to a liquid; a second pressure chamber that applies pressure to the liquid; a nozzle channel that extends in a first direction and includes a nozzle that ejects the liquid; a first communication channel that extends in a second direction crossing the first direction and enables the first pressure chamber and the nozzle channel to communicate with each other; a second communication channel that extends in the second direction and enables the second pressure chamber and the nozzle channel to communicate with each other; and a first branch channel that has a portion extending in the first direction and enables the first pressure chamber and the nozzle channel to communicate with each other through a path different from a path of the first communication channel.

Abstract: a width of the first nozzle channel in the first direction is larger than a width of the first communication channel in the second direction and a width of the first nozzle channel in a third direction intersecting the first direction and the second direction is smaller than a width of the first communication channel in the third direction.

Abstract: The second width is smaller than the first width and the fourth width is larger than the third width.

Abstract: The individual flow path includes a nozzle communicating with an outside, a first flow path, in the middle of which the nozzle is disposed and which extends in a first direction that is an in-plane direction of a nozzle surface of the nozzle plate in which the nozzle opens, a second flow path coupled to the first flow path and extending in a second direction other than the first direction, a third flow path coupled to the second flow path and extending in the third direction other than the second direction, and a pressure chamber which is disposed in the third flow path and in which a pressure change is induced by the energy generating element. A cross-sectional area of the first flow path is smaller than a cross-sectional area of the second flow path.

Abstract: The communication plate has a first layer that defines a wall surface of the communication flow channel, a second layer stacked on a side of the first layer opposite to the wall surface, and a third layer stacked on a side of the second layer opposite to the first layer, and the thermal expansion coefficient of the second layer is smaller than the thermal expansion coefficient of the first layer and is smaller than the thermal expansion coefficient of the third layer.

Abstract: The individual flow path includes a nozzle communicating with an outside, a first flow path, in the middle of which the nozzle is disposed and which extends in a first direction that is an in-plane direction of a nozzle surface of the nozzle plate in which the nozzle opens, a second flow path coupled to the first flow path and extending in a second direction other than the first direction, a third flow path coupled to the second flow path and extending in the third direction other than the second direction, and a pressure chamber which is disposed in the third flow path and in which a pressure change is induced by the energy generating element. A cross-sectional area of the first flow path is smaller than a cross-sectional area of the second flow path.

Abstract: A liquid ejecting head includes a first flow path extending in a first axial direction between a supply port and a discharge port, and a nozzle that is provided to branch from the first flow path and that discharges a liquid along a second axial direction orthogonal to the first axial direction. The nozzle includes a first nozzle portion in which a first opening for discharging the liquid is formed and a second nozzle portion in which a second opening that is a coupling port with the first flow path is formed, and a diameter r2 of the second opening in the first axial direction is larger than a diameter r1 of the first opening in the first axial direction.

Abstract: The individual flow path includes a nozzle communicating with an outside, a first flow path, in the middle of which the nozzle is disposed and which extends in a first direction that is an in-plane direction of a nozzle surface of the nozzle plate in which the nozzle opens, a second flow path coupled to the first flow path and extending in a second direction other than the first direction, a third flow path coupled to the second flow path and extending in the third direction other than the second direction, and a pressure chamber which is disposed in the third flow path and in which a pressure change is induced by the energy generating element. A cross-sectional area of the first flow path is smaller than a cross-sectional area of the second flow path.

Abstract: A liquid discharge apparatus includes: a nozzle plate having a plurality of nozzles; a pressure chamber communicating with the nozzle; and a pressure generating element, in which each of the nozzles is formed by communicating a first opening portion and a second opening portion, when two nozzles adjacent to each other are represented by a first nozzle and a second nozzle, the second opening portion of the first nozzle and the second opening portion of the second nozzle are disposed along a first direction, each of the second opening portions extends in a second direction, and an inner diameter of the second opening portion in the second direction is larger than an inner diameter of the first opening portion, the first opening portion of the first nozzle and the first opening portion of the second nozzle are disposed so as to be shifted from each other in the second direction.

Abstract: A liquid discharge apparatus includes: a nozzle plate having a plurality of nozzles; a pressure chamber communicating with the nozzle; and a pressure generating element, in which each of the nozzles is formed by communicating a first opening portion and a second opening portion, when two nozzles adjacent to each other are represented by a first nozzle and a second nozzle, the second opening portion of the first nozzle and the second opening portion of the second nozzle are disposed along a first direction, each of the second opening portions extends in a second direction, and an inner diameter of the second opening portion in the second direction is larger than an inner diameter of the first opening portion, the first opening portion of the first nozzle and the first opening portion of the second nozzle are disposed so as to be shifted from each other in the second direction.