Patents by Inventor Kengo Umeda

Kengo Umeda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10668719
    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.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: June 2, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Sakurai, Nobuyuki Hirayama, Ryo Kasai, Kengo Umeda, Hidenori Yamato, Masanobu Ohmura, Tatsuhito Goden
  • Patent number: 10603912
    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.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: March 31, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yosuke Miura, Kengo Umeda, Takaaki Yamaguchi
  • Patent number: 10596815
    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.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: March 24, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shingo Okushima, Satoshi Oikawa, Satoshi Kimura, Tatsurou Mori, Kengo Umeda, Masataka Sakurai
  • Patent number: 10589520
    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.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: March 17, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Oikawa, Shingo Okushima, Satoshi Kimura, Kengo Umeda
  • Patent number: 10532565
    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.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: January 14, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yohei Osuki, Masataka Sakurai, Ryo Kasai, Kengo Umeda, Hidenori Yamato
  • Publication number: 20190381790
    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.
    Type: Application
    Filed: August 1, 2019
    Publication date: December 19, 2019
    Inventors: Ryo Kasai, Kengo Umeda, Takamitsu Tokuda
  • Patent number: 10471713
    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.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: November 12, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Oikawa, Tatsurou Mori, Shingo Okushima, Satoshi Kimura, Kengo Umeda
  • Patent number: 10434772
    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.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: October 8, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kengo Umeda, Satoshi Kimura, Shingo Okushima, Satoshi Oikawa
  • Patent number: 10427400
    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.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: October 1, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hidenori Yamato, Hideo Kanno, Masataka Sakurai, Ryo Kasai, Kengo Umeda
  • Patent number: 10406808
    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.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: September 10, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ryo Kasai, Kengo Umeda, Takamitsu Tokuda
  • Patent number: 10391788
    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.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: August 27, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kengo Umeda, Ryo Kasai
  • Publication number: 20190232644
    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.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Inventors: Kengo Umeda, Ryo Kasai
  • Patent number: 10350884
    Abstract: There is provided an elongated liquid ejection head capable of voltage drop suppression and high-speed ejection operation. For this purpose, in each of flexible circuits electrically connecting element substrates to electrical substrates, a width Wa on a side connected to the electrical substrate is smaller than the width of another area.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: July 16, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shingo Okushima, Satoshi Oikawa, Satoshi Kimura, Tatsurou Mori, Kengo Umeda, Masataka Sakurai
  • Patent number: 10315415
    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.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: June 11, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kengo Umeda, Ryo Kasai
  • Publication number: 20190023007
    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.
    Type: Application
    Filed: September 21, 2018
    Publication date: January 24, 2019
    Inventors: Masataka Sakurai, Nobuyuki Hirayama, Ryo Kasai, Kengo Umeda, Hidenori Yamato, Masanobu Ohmura, Tatsuhito Goden
  • Publication number: 20190016119
    Abstract: A liquid ejection head in accordance with the present invention 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, wherein, at the attitude of the liquid ejection head attached to the main unit of a liquid ejection apparatus, the sensor is disposed below the capacitor in a vertical direction.
    Type: Application
    Filed: July 10, 2018
    Publication date: January 17, 2019
    Inventors: Satoshi Oikawa, Shingo Okushima, Satoshi Kimura, Kengo Umeda
  • Publication number: 20190001680
    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.
    Type: Application
    Filed: June 25, 2018
    Publication date: January 3, 2019
    Inventors: Yosuke Miura, Kengo Umeda, Takaaki Yamaguchi
  • Publication number: 20190001667
    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.
    Type: Application
    Filed: June 15, 2018
    Publication date: January 3, 2019
    Inventors: Ryo Kasai, Kengo Umeda, Takamitsu Tokuda
  • Publication number: 20180370233
    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.
    Type: Application
    Filed: June 27, 2018
    Publication date: December 27, 2018
    Inventors: RYO KASAI, NOBUYUKI HIRAYAMA, MASATAKA SAKURAI, KENGO UMEDA, HIDENORI YAMATO, MAKOTO TAKAGI, TATSUHITO GODEN, SADAYOSHI SAKUMA, NOBUYUKI SUZUKI, TORU ETO
  • Publication number: 20180370224
    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.
    Type: Application
    Filed: June 18, 2018
    Publication date: December 27, 2018
    Inventors: Yohei Osuki, Masataka Sakurai, Ryo Kasai, Kengo Umeda, Hidenori Yamato