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 document platen on which a document is placed; and a reading sensor having a light source for irradiating the document with light, are provided, and the reading sensor performs first scanning for irradiating the document with light at a first light quantity, and then performs second scanning for irradiating the document with light at a second light quantity greater than the first light quantity.

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 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: An element substrate according to an embodiment of the present invention includes a plurality of print elements and a plurality of drive elements for driving the plurality of print elements. The element substrate comprises a generation circuit configured to generate a first drive signal that drives drive elements belonging to a first group among the plurality of drive elements, and a second drive signal that drives drive elements belonging to a second group among the plurality of drive elements, using a selector configured to switch a signal transmitted from outside of the element substrate and an output destination of the signal within one block period in driving the plurality of drive elements by dividing the plurality of elements into the plurality of blocks. The first drive signal and the second drive signal are generated at different timings.

Abstract: A method of manufacturing a semiconductor device includes forming a semiconductor layer on an upper surface of a substrate, forming an etching stopper on an upper surface of the semiconductor layer, forming a metal mask including a seed film and a plating film on a lower surface of the substrate, the metal mas having an opening inside the etching stopper in plan view, forming a through-hole in the substrate and the semiconductor layer from the lower surface of the substrate to the etching stopper through the opening, and removing the plating film by an anodic reaction in an electrolyte solution after forming the through-hole.

Abstract: In a head substrate according to an embodiment of the present invention comprises a plurality of nozzles for discharging liquid; a plurality of electrothermal transducers corresponding to the plurality of nozzles; and a plurality of drivers corresponding to the plurality of electrothermal transducers, the substrate has the following configuration. Specifically, it comprises a detection circuit that detects, in a case where one of the plurality of electrothermal transducers is selected, a temperature of the selected transducer to which a first signal is applied to in order to discharge a liquid from a nozzle corresponding to the selected electrothermal transducer, and then a second signal is applied to heat the selected electrothermal transducer.

Abstract: A liquid ejection head, a liquid ejection apparatus, and a liquid ejection method are capable of sufficiently suppressing the thickening of a liquid in an ejection orifice. The liquid ejection head includes a pressure chamber, a channel in which a liquid is caused to flow through the pressure chamber, an ejection orifice communicating with the pressure chamber, and an ejection energy generation element configured to eject the liquid in the pressure chamber from the ejection orifice. A meniscus of the liquid is formed at an end portion of the ejection orifice communicating with the pressure chamber.

Abstract: An element substrate according to an embodiment of the present invention includes a plurality of print elements and a plurality of drive elements for driving the plurality of print elements. The element substrate comprises a generation circuit configured to generate a first drive signal that drives drive elements belonging to a first group among the plurality of drive elements, and a second drive signal that drives drive elements belonging to a second group among the plurality of drive elements, using a selector configured to switch a signal transmitted from outside of the element substrate and an output destination of the signal within one block period in driving the plurality of drive elements by dividing the plurality of elements into the plurality of blocks. The first drive signal and the second drive signal are generated at different timings.

Abstract: A printing apparatus comprising a printing element substrate, including a substrate including a heating element for heating and discharging liquid and a temperature detecting element for detecting a temperature of the substrate, wherein a detection period, during which a detecting result is obtainable, extends across a plurality of cycles of a latch signal, and a heating enabling signal for discharging the liquid and the latch signal are output such that, in the detection period, an output value of a temperature waveform does not exceed a preset threshold value, the temperature waveform being a temperature waveform of the substrate detected by the temperature detecting element.

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: In a liquid ejection head, ejection orifices can be densely arranged while suppressing decrease in liquid flow speed. A channel extending through a pressure chamber extends in a direction crossing an ejection orifice array such that a liquid flows between the two ends of the channel located on the sides of the ejection orifice array.

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: In a head substrate according to an embodiment of the present invention comprises a plurality of nozzles for discharging liquid; a plurality of electrothermal transducers corresponding to the plurality of nozzles; and a plurality of drivers corresponding to the plurality of electrothermal transducers, the substrate has the following configuration. Specifically, it comprises a detection circuit that detects, in a case where one of the plurality of electrothermal transducers is selected, a temperature of the selected transducer to which a first signal is applied to in order to discharge a liquid from a nozzle corresponding to the selected electrothermal transducer, and then a second signal is applied to heat the selected electrothermal transducer.

Abstract: A liquid ejection head includes a pair of electrodes disposed on a first surface of a substrate forming part of a flow path for a liquid. The electrodes of the pair of electrodes are adjacent to each other in a transverse direction of the electrodes, and the liquid moves in the transverse direction upon application of a voltage across the electrodes. The electrodes each include a ridge portion disposed on the first surface and an electrode wiring line connected to a power source for applying the voltage. The electrode wiring line covers an upper surface of the ridge portion and side surfaces of the ridge portion and extends from parts covering the side surfaces of the ridge portion to a downstream side and an upstream side with respect to a direction in which the liquid moves, so as to cover the first surface.

Abstract: A printing apparatus, comprises: a printhead substrate; an application circuit for applying a driving signal to the driving element; a ground line connected to the application circuit; a plurality of temperature sensors that detects temperature relate to the printhead substrate, wherein the cathode side of the plurality of temperature sensors connects the ground line via a resistance; a first selection circuit, on an anode side of the plurality of temperature sensors, that selects one temperature sensor; a second selection circuit, on the cathode side of the plurality of temperature sensor, that selects the one temperature sensor; and a temperature signal output circuit that outputs a temperature signal in accordance with a difference between a voltage of an anode side and a voltage of a cathode side of the selected temperature sensor.

Abstract: A liquid ejection head can stably eject a liquid from an ejection port by mitigating thickening of the liquid by evaporation from the ejection port. The liquid ejection head has a support substrate; a liquid chamber arranged on the support substrate and provided with an energy generating element for generating energy necessary for ejection of a liquid and an ejection port from which the liquid is ejected; and a circulation flow path of the liquid that passes through the liquid chamber. The liquid ejection head further has a first circulating element that forms a first circulatory flow in the circulation flow path; and a second circulating element that forms a second circulatory flow inside the liquid chamber and a driving frequency of the first circulating element is lower than a driving frequency of the second circulating element.

Abstract: A printing apparatus comprising a printing element substrate, including a substrate including a heating element for heating and discharging liquid and a temperature detecting element for detecting a temperature of the substrate, wherein a detection period, during which a detecting result is obtainable, extends across a plurality of cycles of a latch signal, and a heating enabling signal for discharging the liquid and the latch signal are output such that, in the detection period, an output value of a temperature waveform does not exceed a preset threshold value, the temperature waveform being a temperature waveform of the substrate detected by the temperature detecting element.

Abstract: According to an embodiment of the present disclosure, to improve a layout efficiency of an element substrate to be integrated in a printhead and reduce a production cost of the element substrate, a driving method and a size of a first driver transistor used for driving a first heater for ink circulation and a driving method and a size of a second driver transistor used for driving a second heater for discharging ink to print are optimized, respectively. More specifically, the first driver transistor and the second driver transistor have multi-finger configurations, gate widths of the multi-finger configurations are equal to each other, and the number of fingers forming each first driver transistor is different from the number of fingers forming each second driver transistor.

Abstract: A print element board includes a surface provided with a first side and a plurality of terminals arranged along the first side near the first side, in which an angle at a first peak located at a first end of the first side is smaller than an angle at a second peak located at a second end of the first side, and a printing element electrically connected with the terminals for recording. A distance between the first peak and a first terminal disposed closest to the first peak is longer than a distance between the second peak and a second terminal disposed closest to the second peak.