Abstract: To provide a liquid ejection head capable of implementing both improvement of reliability and downsizing at the same time. The liquid ejection head comprises an element substrate ejecting liquid, an electrical wiring substrate electrically connected to the element substrate, and a liquid storage portion configured to store liquid to be supplied to the element substrate. On the first face of the electrical wiring substrate, an electrical part generating heat in a case where power input from the outside for ejecting liquid is controlled is provided. The liquid storage portion is provided on the first face side of the electrical wiring substrate. The electrical part and the liquid storage portion are not provided at positions opposite to each other in a case of being viewed from a direction perpendicular to the first face.

Abstract: A flexible printed circuit board whose end part side is connected to a print element substrate capable of ejecting ink using a print element, so as to be capable of transmitting a signal from a control part of a printing apparatus to the print element substrate via wiring and to be capable of transmitting a signal from the print element substrate to the control part via the wiring, wherein a side part side of high-potential wiring includes at least one of a regulation part that regulates penetration of ink and a wiring part that is configured with low-potential ground wiring and low-potential liquid signal line whose signal value transmitted by the control part or operation based on a signal is monitored.

Abstract: A printing head includes printing element boards which are in fluid communication with each other through a liquid chamber, includes an inlet port and an outlet port, and is arranged such that the ink circulates inside the liquid chamber, and inside the liquid chamber, the ink circulates in nozzle portions in the printing element boards. An inspection apparatus includes: the printing head; an inlet passage; an outlet passage; an ink circulatory system; an inlet temperature sensor; and an outlet temperature sensor, and estimates a temperature distribution of the printing head from measured values of the inlet temperature sensor and the outlet temperature sensor and calculates calibration values of the temperature sensors of the respective printing element boards.

Abstract: A liquid ejection head includes a print element substrate having an ejection surface on which an ejection port corresponding to a print element for ejecting liquid is formed and a plurality of ejection port arrays formed of a plurality of the ejection ports are formed and a protective member having a plurality of openings and placed on the print element substrate so that the plurality of openings and the plurality of ejection port arrays are aligned so as to correspond to each other, and one or more print element number identifiers for identifying a print element number assigned to the print element are at a plurality of locations above the ejection port arrays and near an opening on the protective member.

Abstract: A flexible printed circuit board whose end part side is connected to a print element substrate capable of ejecting ink using a print element, so as to be capable of transmitting a signal from a control part of a printing apparatus to the print element substrate via wiring and to be capable of transmitting a signal from the print element substrate to the control part via the wiring, wherein a side part side of high-potential wiring includes at least one of a regulation part that regulates penetration of ink and a wiring part that is configured with low-potential ground wiring and low-potential liquid signal line whose signal value transmitted by the control part or operation based on a signal is monitored.

Abstract: A liquid ejection head includes an element substrate for ejecting a liquid, an integrated circuit board outputting a control signal for controlling the element substrate, and an electrical wiring board connected electrically to the element substrate. The electrical wiring board has a signal line connector to which control signals are inputted and electrical wiring board connectors to which an electric signal for driving the liquid ejection head is inputted. The signal line connector and the electrical wiring board connectors are disposed on opposite sides to each other relative to a center line extending orthogonally to a longitudinal direction of the electrical wiring board.

Abstract: A liquid ejection head includes an element substrate 10 for ejecting a liquid, an integrated circuit board 14 outputting a control signal for controlling the element substrate, and an electrical wiring board 11 connected electrically to the element substrate. The electrical wiring board 11 has a signal line connector 25 to which control signals are inputted, electrical wiring board connectors 22-24 to which electric signal for driving the liquid ejection head is inputted. The signal line connector 25 and the electrical wiring board connectors 22-24 are disposed on opposite sides to each other relative to a center line C extending orthogonally to a longitudinal direction of the electrical wiring board 11.

Abstract: A liquid discharging head includes a recording element board in which a plurality of discharge ports configured to discharge liquid are arrayed in a first direction, a support member configured to support the recording element board and including a common liquid chamber extending in the first direction to supply the liquid to the plurality of discharge ports and a buffer chamber configured to have an opening in a ceiling surface of the common liquid chamber opposed to the recording element board and to hold a bubble, and a heater located in a region of the recording element board opposed to a part of the ceiling surface extending from the opening of the buffer chamber to an end portion in the first direction and configured to generate heat when the liquid is not discharged from the plurality of discharge ports.

Abstract: A liquid discharge head includes a discharge unit that discharges a liquid as a result of electric energy being supplied to the discharge unit, a first wiring member that is joined to the discharge unit and that includes a plurality of first joining terminals each capable of transmitting the electric energy to the discharge unit, and a second wiring member that is electrically joined to the first wiring member and that includes a plurality of second joining terminals. At least three of the plurality of first joining terminals are inspection terminals that are short-circuited, and the second joining terminals are connected to contact terminals to each of which an external signal can be input.

Abstract: There are provided a liquid ejecting head, an ejecting element substrate and a liquid ejecting apparatus that can suppress degradation in print quality. Therefore in an ejecting element substrate arranged the closest to the center of a support member, a flow resistance of a flow passage corresponding to an ejection opening of an ejection opening array arranged the closest to the center of the ejecting element substrate is made high.

Abstract: A liquid discharge head includes a substrate having an element that discharges liquid by generating thermal energy to generate an air bubble in the liquid, and a liquid supply port for supplying the liquid to the element, and a flow path forming assembly including a flow path forming member having a discharge port for discharging the liquid and, between the substrate and the flow path forming member, a pressure chamber including the element disposed adjacent thereto and a flow path causing the pressure chamber and the liquid supply port to communicate with each other. In addition, an interlayer is provided on a joining portion of the substrate and the flow path forming member and provided so as to protrude from between the substrate and the flow path forming member into the flow path, and a protection layer including metal is formed so as to cover the element.

Abstract: A method for stabilizing a refilling speed within a predetermined range even with various physical properties of liquid to be ejected is provided for a liquid ejection head using a thermal system. To achieve this, a drive pulse is controlled for each nozzle array according to the combination of a predetermined material and structure of a bubble-generating chamber and the physical property of the liquid to be ejected such that an amount of an overshoot and the refilling speed are within a predetermined range.

Abstract: A liquid discharge head includes a discharge unit that discharges a liquid as a result of electric energy being supplied to the discharge unit, a first wiring member that is joined to the discharge unit and that includes a plurality of first joining terminals each capable of transmitting the electric energy to the discharge unit, and a second wiring member that is electrically joined to the first wiring member and that includes a plurality of second joining terminals. At least three of the plurality of first joining terminals are inspection terminals that are short-circuited, and the second joining terminals are connected to contact terminals to each of which an external signal can be input.

Abstract: A liquid discharge head includes a print element substrate provided with discharge ports, through which liquid is discharged; and a support member having a liquid chamber, which is provided with a communicating opening that communicates with the discharge ports, wherein the liquid chamber has a first surface provided with the communicating opening, and a second surface facing the first surface, the second surface is provided with a buffer chamber, which is a hollow space for storing gas, and the buffer chamber has, in the second surface, an opening having a projecting portion projecting toward the inner side of the opening.

Abstract: There is provided a method for stabilizing a refilling speed within a predetermined range even with various physical properties of liquid to be ejected in a liquid ejection head using a thermal system. To achieve this, a drive pulse is controlled for each nozzle array according to the combination of a predetermined material and structure of a bubble-generating chamber and the physical property of the liquid to be ejected such that an amount of an overshoot and the refilling speed are within a predetermined range.

Abstract: A liquid discharging head includes a recording element board in which a plurality of discharge ports configured to discharge liquid are arrayed in a first direction, a support member configured to support the recording element board and including a common liquid chamber extending in the first direction to supply the liquid to the plurality of discharge ports and a buffer chamber configured to have an opening in a ceiling surface of the common liquid chamber opposed to the recording element board and to hold a bubble, and a heater located in a region of the recording element board opposed to a part of the ceiling surface extending from the opening of the buffer chamber to an end portion in the first direction and configured to generate heat when the liquid is not discharged from the plurality of discharge ports.

Abstract: Provided is a liquid ejection head, including: a liquid chamber; a supply port; and a recording element substrate arranged at a position opposed to the supply port across the liquid chamber. The liquid chamber includes: a first surface connected to the supply port; and a wall surface extending in a direction away from the recording element substrate. The wall surface includes: a space chamber connected to the first surface; and a second surface connecting a wall surface of the space chamber and the recording element substrate to each other. An intersection portion of the wall surface of the space chamber and a plane extended from the first surface is more distant from the recording element substrate than a connection portion between the wall surface of the space chamber and the second surface.

Abstract: A liquid discharge head includes a print element substrate provided with discharge ports, through which liquid is discharged; and a support member having a liquid chamber, which is provided with a communicating opening that communicates with the discharge ports, wherein the liquid chamber has a first surface provided with the communicating opening, and a second surface facing the first surface, the second surface is provided with a buffer chamber, which is a hollow space for storing gas, and the buffer chamber has, in the second surface, an opening having a projecting portion projecting toward the inner side of the opening.

Abstract: There are provided a liquid ejecting head, an ejecting element substrate and a liquid ejecting apparatus that can suppress degradation in print quality. Therefore in an ejecting element substrate arranged the closest to the center of a support member, a flow resistance of a flow passage corresponding to an ejection opening of an ejection opening array arranged the closest to the center of the ejecting element substrate is made high.

Abstract: A liquid ejection head including: a recording element substrate provided with an element; an electric wiring substrate having a bent portion, a connecting portion provided on one side of the bent portion and connected with the recording element substrate, and an input portion provided on the other side of the bent portion; and a housing having a first surface, a second surface, a depression provided on the second surface, and a member separated from a bottom surface of the depression and extending into an opening of the depression, wherein part of the other side of the electric wiring substrate is disposed between the bottom surface of the depression and the member.