Abstract: Image capturing that suppresses a drop in numerical aperture and achieves a smaller size is disclosed. In one example, an image capturing apparatus includes pixels each having a photoelectric conversion unit, a floating diffusion that outputs a voltage according to a charge obtained from photoelectric conversion by the photoelectric conversion unit, and a current amplification unit that amplifies a current according to the voltage of the floating diffusion. The region in which the photoelectric conversion units are disposed and the region in which the current amplification units are disposed transmit and receive the voltages of the floating diffusions through a corresponding signal transmission unit.

Abstract: A print element substrate, comprising a plurality of functional elements, a plurality of driving elements configured to drive the plurality of functional elements based upon one of a plurality of drive signals, a shift register configured to store functional data indicating whether or not to drive the functional element, a data analyzing unit configured to analyze the functional data input into the shift register, and a drive signal selection unit configured to select one of the plurality of drive signals in response to an analysis result from the data analyzing unit.

Abstract: To provide an image capturing device capable of suppressing a decrease of a dynamic range of the entire image capturing device caused by an input transistor of a comparator inserted between a signal line and a load current source in an analog-digital converter. The image capturing device of the present disclosure includes: a load current source; a comparator that includes an input transistor connected between a signal line that transmits a signal read from a pixel and the load current source; and a reference signal supply section that supplies a predetermined reference signal to a charge-voltage conversion section of the pixel.

Abstract: Solid-state imaging devices are disclosed. In one example, a solid-state imaging device includes an AD converter that obtains an electric signal from a pixel and performs AD conversion on the electric signal. The electric signal is compared with a reference signal that has a voltage changing with the lapse of time. The reference signal is generated by a reference signal generator with a first current circuit that causes a first current to flow, an output circuit including a first input unit connected to the first current circuit, a second input unit that receives a reference voltage for determining an initial value of the reference signal, and an output unit that outputs the reference signal on the basis of voltages of the first input unit and the second input unit. A first capacitive element changes the reference signal by accumulating or discharging the first current.

Abstract: A print element substrate, comprising a plurality of functional elements, a plurality of driving elements configured to drive the plurality of functional elements based upon one of a plurality of drive signals, a shift register configured to store functional data indicating whether or not to drive the functional element, a data analyzing unit configured to analyze the functional data input into the shift register, and a drive signal selection unit configured to select one of the plurality of drive signals in response to an analysis result from the data analyzing unit.

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 printhead includes a printing element; a first power supply wiring configured to be electrically connected to one terminal of the printing element and supply power to the printing element; a transistor configured to be electrically connected to another terminal of the printing element and drive the printing element; a first ground wiring configured to be electrically connected to a source of the transistor; a second ground wiring configured to be electrically connected to a back gate of the transistor; and a first capacitive element configured to be electrically connected, at one terminal thereof, to the first ground wiring and electrically connected at another terminal thereof, to the second ground wiring.

Abstract: An element substrate of a liquid ejection head includes: a base material; an insulating film positioned on the base material; a heating resistance element for generating heat energy for ejecting a liquid; a protective film for covering the heating resistance element; a first electrical wiring layer arranged in the insulating film, for supplying a current to the heating resistance element; a second electrical wiring layer arranged on a layer different from the first electrical wiring layer in the insulating film, for supplying a current to the heating resistance element; and at least one connecting member extending into the insulating film to connect the first electrical wiring layer and the heating resistance element, for causing the current to flow in a first direction, the heating resistance element including a connecting region, extending in a second direction intersecting the first direction, to which the at least one connecting member is connected.

Abstract: A recording element substrate includes a substrate, a plurality of energy generating elements arranged on the substrate to form an element row, a plurality of supply ports arranged along the element row to form a supply port row, and a plurality of supply paths extending from the plurality of supply ports along the thickness direction of the substrate, wherein a plurality of beam portions disposed between adjacent supply ports in the direction of the supply port row has a plurality of conductor layers in which a conductor layer including a power supply conductor connected to the energy generating elements and a conductor layer including a ground conductor connected to the energy generating elements, are stacked along the thickness direction of the substrate, and wherein at least one of the plurality of conductor layers is occupied by one power supply conductor or one ground conductor.

Abstract: There are provided an element board, a liquid ejection head, and a printing apparatus capable of suppressing decrease of the durability of the heating resistor elements. For that purpose, a group of driving electrode pads is shifted from the center of a column of electrode pads toward the side where a heating resistor element located farthest from the group of driving electrode pads exists.

Abstract: A liquid ejection head is capable of performing high-speed ejection operation as well as reducing a depth dimension. For this purpose, in a configuration in which flexible circuits electrically connect element substrates to electrical substrates, the electrical substrates are arrayed in two lines along a plane different from a plane on which the element substrates are arrayed and the flexible circuits electrically connect the element substrates to the electrical substrates while being bent.

Abstract: A liquid ejection head includes a recording element substrate which ejects a liquid downward; an electric substrate which is disposed above the recording element substrate, which has a plurality of electric components, including a capacitor, and which is electrically connected to the recording element substrate; a wall which covers the electric substrate such that a liquid can be retained between the wall and the electric substrate; and a sensor which is disposed in an area covered by the wall and which detects for the presence of a liquid. In the attitude of the liquid ejection head as attached to the main unit of a liquid ejection apparatus, the sensor is disposed below the capacitor in a vertical direction.

Abstract: In a print element substrate: if an amount of a voltage drop when the number of print elements driven simultaneously in a state in which the predetermined voltage is applied with respect to one print element array is largest is set as an amount of a voltage drop of the print element array, and a sum of amounts of voltage drops of the print element arrays assigned to one group is set as an amount of a voltage drop of the group, a difference between a largest value and a smallest value of the amounts of the voltage drops of the M groups is smaller than a largest value of the amounts of the voltage drops of the N print element arrays.

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: An inkjet print head includes an ejection module having a printing element substrate that ejects ink to a print medium and a flexible wiring substrate electrically connected to the printing element substrate; and a member for supporting the ejection module by joining, wherein the flexible wiring substrate has a capacitor, a periphery of the capacitor being covered with a sealing agent, and the capacitor is provided in a recess formed on the member.

Abstract: A printhead comprises a print element substrate that includes a print element and a circuit board electrically connected to the print element substrate. An ink leakage detection unit, which includes a first electrode and a second electrode, and which is configured to detect ink leakage, is provided on the circuit board. At least one of the first electrode and the second electrode is electrically connected to a terminal of the print element substrate.

Abstract: A printhead comprises a printing element, a driving circuit configured to drive the printing element, an analog signal processing circuit configured to process one or more analog signals, a bias circuit configured to supply a bias voltage to the analog signal processing circuit, and a control terminal to which a control signal is inputted. In a state in which the analog signal processing circuit and the bias circuit are receiving a supply of power, it is possible to switch starting and stopping of at least one of the analog signal processing circuit and the bias circuit based on the control signal.

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: An element substrate, comprises: a plurality of printing elements configured to discharge liquid; a plurality of first driving elements disposed in correspondence with the plurality of printing elements and configured to drive the plurality of printing elements; a plurality of heating elements configured to heat the element substrate; a plurality of second driving elements disposed in correspondence with the plurality of heating elements and configured to drive the plurality of heating elements; and a delay unit that delays timing of driving the plurality of second driving elements to drive the plurality of second driving elements at a predetermined time difference when driving the plurality of second driving elements simultaneously.

Abstract: A printhead includes a printing element; a first power supply wiring configured to be electrically connected to one terminal of the printing element and supply power to the printing element; a transistor configured to be electrically connected to another terminal of the printing element and drive the printing element; a first ground wiring configured to be electrically connected to a source of the transistor; a second ground wiring configured to be electrically connected to a back gate of the transistor; and a first capacitive element configured to be electrically connected, at one terminal thereof, to the first ground wiring and electrically connected at another terminal thereof, to the second ground wiring.