Abstract: A liquid ejection head including: an ejection port portion with an ejection port configured to eject liquid in an ejection direction; a pressure chamber that includes therein an energy-generating element to eject the liquid from the ejection port; a supply channel configured to supply the liquid to the pressure chamber; a collecting channel configured to collect the liquid from the pressure chamber; and a pump configured to cause the liquid in the collecting channel to flow into the supply channel, wherein Fratio is 1.4 or less.

Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.

Abstract: A liquid ejecting head has a laminated flow path member on which a supply flow path for individually supplying a plurality of liquids to an element substrate and a collection flow path for individually collecting the liquids are formed. The supply flow path includes first and second common supply flow paths for horizontally leading first and second liquids to positions corresponding to a plurality of element substrates. The first and second common supply flow paths are formed in the same layer of the laminated flow path member. The collection flow path includes a first common collection flow path for horizontally collecting the first liquid and a second common collection flow path for horizontally collecting the second liquid from positions corresponding to the plurality of element substrates. The first and second common collection flow paths are formed in the same layer of the laminated flow path member.

Abstract: A method is provided for determining, in a liquid ejection apparatus, a state of a liquid ejection from an ejection port. The liquid ejection apparatus includes the ejection port configured to eject a liquid, a substrate comprising an electrothermal conversion element configured to generate heat for ejecting the liquid from the ejection port, and a temperature detection unit configured to detect temperature information on the substrate. The method includes performing a first comparison process to compare the temperature information on the substrate detected at a first timing by the temperature detection unit with a first threshold value, and performing a second comparison process to compare the temperature information on the substrate detected at a second timing by the temperature detection unit with a second threshold value.

Abstract: Provided is a liquid ejection module capable of enhancing the strength of an orifice plate while achieving favorable ejection operation at each ejection port. To that end, the liquid ejection module includes a functional layer in which a plurality of energy generating elements are arranged, a flow channel forming layer in which pressure chambers, individual flow channels, and a common flow channel are formed, and an orifice plate having ejection ports formed therein. The functional layer, the flow channel forming layer and the orifice plate are stacked. In the flow channel forming layer, a beam is formed, extending from a flow channel wall of the common flow channel toward the individual flow channels and supporting the orifice plate in a region facing a first opening.

Abstract: A liquid ejecting head has a laminated flow path member on which a supply flow path for individually supplying a plurality of liquids to an element substrate and a collection flow path for individually collecting the liquids are formed. The supply flow path includes first and second common supply flow paths for horizontally leading first and second liquids to positions corresponding to a plurality of element substrates. The first and second common supply flow paths are formed in the same layer of the laminated flow path member. The collection flow path includes a first common collection flow path for horizontally collecting the first liquid and a second common collection flow path for horizontally collecting the second liquid from positions corresponding to the plurality of element substrates. The first and second common collection flow paths are formed in the same layer of the laminated flow path member.

Abstract: A liquid ejection head includes a print element substrate including multiple ejection openings, pressure chambers, a common flow path, and pumps, the pumps being configured to circulate liquid between the common flow path and the pressure chamber; and a flow path member laminated to the print element substrate. The flow path member includes a supply flow path and a collection flow path, the supply flow path being configured to supply liquid to the print element substrate, and the collection flow path being configured to collect liquid that is not ejected. The supply flow path and the collection flow path have liquid connection with the same common flow path. A circulating pump generates a flow of liquid flowing in an order of the supply flow path, the common flow path, and the collection flow path, the circulating pump being provided at a position different from the print element substrate.

Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.

Abstract: A liquid discharge head includes a liquid discharge substrate that has a discharge-orifice row, pressure generating elements, and pressure chambers. The liquid discharge head discharges a liquid in a block-by-block manner using sequential driving. The discharge-orifice row is disposed so as to incline at an angle ?=Arctan (d1/d2) relative to a direction extending orthogonal to the conveyance direction of the medium, in which d1 (?m) is a disposition spacing of the discharge orifices in the discharge-orifice row in the conveyance direction and d2 (?m) is a disposition spacing of the discharge orifices in the discharge-orifice row in the direction orthogonal to the conveyance direction. A partition wall is formed between adjacent pressure chambers so as to separate the adjacent pressure chambers from each other. The partition wall has a communicating portion that communicates the adjacent pressure chambers with each other.

Abstract: A liquid ejection head includes a print element substrate including multiple ejection openings, pressure chambers, a common flow path, and pumps, the pumps being configured to circulate liquid between the common flow path and the pressure chamber; and a flow path member laminated to the print element substrate. The flow path member includes a supply flow path and a collection flow path, the supply flow path being configured to supply liquid to the print element substrate, and the collection flow path being configured to collect liquid that is not ejected. The supply flow path and the collection flow path have liquid connection with the same common flow path. A circulating pump generates a flow of liquid flowing in an order of the supply flow path, the common flow path, and the collection flow path, the circulating pump being provided at a position different from the print element substrate.

Abstract: The present invention provides a liquid ejection head and a liquid ejection apparatus that can join the ejection member to the ejection member joining surface with a sufficient joining area, and suppress a decrease in joining reliability. To this end, second supply ports are provided in side portions of an ejection member.

Abstract: Provided is a liquid ejection head capable of suppressing a decrease in printing quality. To this end, circulation efficiency J at an ejection orifice on a downstream side in a flow direction in a channel is set high.

Abstract: An object is to provide a liquid ejection head that is compact and whose reliability of an electrical connection portion is high. The liquid ejection head has a plurality of sets of element substrates in which a plurality of ejection elements ejecting a liquid of the same type is arrayed and a plurality of sets of electrical wiring members for supplying electric power to the element substrate. Each element substrate is arrayed in a second direction inclined with respect to a first direction in which the plurality of ejection elements is arrayed. The electrical wiring member is connected to a terminal arranged at one end portion of the element substrate and extends in a third direction intersecting the first direction and the second direction.

Abstract: A liquid ejection head including an ejection port forming part, a flow path forming part including a liquid chamber, and an individual supply flow path configured to supply liquid to the liquid chamber, and a substrate including a supply flow path configured to supply liquid to the individual supply flow path and an outflow flow path configured to cause liquid to flow out of the liquid chamber, wherein a height of the individual supply flow path is larger than a height from a surface of the liquid chamber facing the ejection port to the ejection port forming member, and when viewed from the direction perpendicular to the surface of the substrate, a sidewall surface of the liquid chamber on a side with the supply flow path (1) coincides with an end surface of the ejection port, or (2) is disposed within the ejection port.

Abstract: Provided is a liquid ejection module capable of enhancing the strength of an orifice plate while achieving favorable ejection operation at each ejection port. To that end, the liquid ejection module includes a functional layer in which a plurality of energy generating elements are arranged, a flow channel forming layer in which pressure chambers, individual flow channels, and a common flow channel are formed, and an orifice plate having ejection ports formed therein. The functional layer, the flow channel forming layer and the orifice plate are stacked. In the flow channel forming layer, a beam is formed, extending from a flow channel wall of the common flow channel toward the individual flow channels and supporting the orifice plate in a region facing a first opening.

Abstract: To provide a liquid ejection module capable of arranging ejection openings for a high resolution and suppressing an increase in wiring resistance without decreasing liquid circulation efficiency, a liquid delivery mechanism is arranged below an energy generating element, a plurality of penetrating flow paths are provided to correspond to a plurality of pressure chambers, respectively, and electric wiring is routed between adjacent penetrating flow paths.

Abstract: A liquid ejection head includes: an ejection port array being an array of ejection ports; a plurality of pressure chambers corresponding respectively to the ejection ports and communicating with the ejection ports; individual supply channels and individual collection channels communicating with the pressure chambers; a common supply channel communicating with surfaces of the individual supply channels opposite to surfaces thereof communicating with the pressure chambers; a common collection channel communicating with surfaces of the individual collection channels opposite to surfaces thereof communicating with the pressure chambers; and a damper member forming a wall of a part of at least one of the common supply channel or the common collection channel. The common supply channel and the common collection channel are formed so as to extend in a first direction along the ejection port array, and are disposed side by side in a second direction crossing the ejection port array.

Abstract: A liquid ejection head includes: an array of ejection ports; pressure chambers corresponding respectively to and communicating with the ejection ports; individual supply channels and individual collection channels communicating with the chambers; a common supply channel communicating with surfaces of the individual supply channels opposite to surfaces thereof communicating with the chambers; a common collection channel communicating with surfaces of the individual collection channels opposite to surfaces thereof communicating with the chambers; and a damper member forming a wall of a part of a channel in the common collection channel. A wall of a part of a channel in the common supply channel is not formed by the damper member. The common supply channel and the common collection channel are formed so as to extend in a first direction along the ejection port array, and are disposed side by side in a second direction crossing the ejection port array.

Abstract: An object is to provide a liquid ejection head and liquid ejection apparatus capable of reducing or preventing a decrease in image quality without increasing the chip size. To achieve this, a configuration is employed in which a bonding layer is not provided between a liquid supply substrate and channel partitions between common supply channels and common collection channels, and a minute communication portion is provided there.

Abstract: A liquid ejection head includes a plurality of nozzles arranged along a first direction of an ejection surface, a plurality of pressure chambers communicating with the plurality of individual nozzles and provided with actuators configured to apply, to a liquid, pressures for ejecting the liquid from the nozzles, a plurality of discrete flow paths communicating with the plurality of individual pressure chambers, a common flow path communicating with the plurality of individual discrete flow paths via discrete opening portions and extending in the first direction, and a damper mechanism disposed to face the common flow path in a direction crossing the ejection surface to absorb a pressure fluctuation in the liquid in the common flow path. The common flow path is provided with a partition wall disposed between the discrete opening portions adjacent in the first direction to extend in the direction crossing the ejection surface.