Patents by Inventor Tomoko Kudo

Tomoko Kudo 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: 10703100
    Abstract: Provided is a liquid ejection head including: a substrate; an energy-generating element, which is arranged on the substrate, and is used for ejecting a liquid; a flow path forming member, which has an ejection orifice for ejecting the liquid, and is configured to form a flow path of the liquid between the flow path forming member and the substrate; an electrode configured to generate a flow of the liquid; and a wiring, which is arranged so as to be brought into contact with the flow path forming member, and is configured to supply electric power to the electrode, in which the flow path forming member contains an organic material, and in which the electrode and the wiring are each formed of a conductive adhesive layer containing at least one of conductive diamond-like carbon or tin-doped indium oxide.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: July 7, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masafumi Morisue, Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Ryo Kasai, Tomoko Kudo, Takashi Sugawara
  • Publication number: 20200139703
    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 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 in a direction in which the liquid moves, so as to cover the first surface.
    Type: Application
    Filed: November 1, 2019
    Publication date: May 7, 2020
    Inventors: Takashi Sugawara, Masafumi Morisue, Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Ryo Kasai, Tomoko Kudo
  • Patent number: 10639888
    Abstract: A liquid ejection head including a substrate, an energy generating element which is provided on the substrate and is used for ejecting a liquid, a flow passage forming member which includes an ejection orifice, which ejects the liquid, and which forms a flow passage of the liquid between the flow passage forming member and the substrate, and an electrode which is provided on a surface of the flow passage forming member which adjoins the flow passage and which generates a flow of the liquid, in which at least a portion of the electrode is covered within the flow passage forming member.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: May 5, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masafumi Morisue, Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Ryo Kasai, Tomoko Kudo, Takashi Sugawara
  • Publication number: 20200009864
    Abstract: Provided is a liquid ejecting head including an element substrate including: a common liquid chamber connected to a liquid supply source; a pressure chamber connected to the common liquid chamber and including inside an element to generate energy used for ejecting liquid; a bubble generating chamber connected to the common liquid chamber and including inside a pump to cause a flow of the liquid; and a connection flow path connecting the pressure chamber and the bubble generating chamber, in which the liquid ejecting head includes a first anti-cavitation film over the element to generate the energy and a second anti-cavitation film over the pump, and the first anti-cavitation film and the second anti-cavitation film have different film thicknesses.
    Type: Application
    Filed: June 12, 2019
    Publication date: January 9, 2020
    Inventors: Masafumi Morisue, Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Ryo Kasai, Tomoko Kudo, Takashi Sugawara
  • Patent number: 10322578
    Abstract: A liquid ejection head includes a substrate including an electrically insulating film, an energy generating element provided on the substrate and configured to generate energy used to eject a liquid, a flow path formed through the substrate and communicating with an ejection port configured to eject a liquid, and a wiring layer formed in the electrically insulating film of the substrate, used to drive the energy generating element, provided apart from a wall defining the flow path, and provided to surround the flow path in a plan view of the substrate.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: June 18, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoko Kudo, Takaaki Yamaguchi, Keiji Tomizawa, Masaki Oikawa, Yoshihiro Hamada, Masataka Sakurai
  • Publication number: 20190092009
    Abstract: A liquid ejection head including: a substrate; an energy generating element, which is provided on the substrate and is utilized to eject liquid; a first film provided on the energy generating element; a flow path forming member, which has an ejection orifice from which the liquid is ejected and forms a flow path of the liquid between the substrate and the flow path forming member; and an electrode, which generates a flow of the liquid, wherein the electrode includes the first film.
    Type: Application
    Filed: September 20, 2018
    Publication date: March 28, 2019
    Inventors: Tomoko Kudo, Ryo Kasai, Masafumi Morisue, Yoshiyuki Nakagawa, Takuro Yamazaki, Takashi Sugawara, Kazuhiro Yamada
  • Publication number: 20190092007
    Abstract: Provided is a liquid ejection head including: a substrate; an energy-generating element, which is arranged on the substrate, and is used for ejecting a liquid; a flow path forming member, which has an ejection orifice for ejecting the liquid, and is configured to form a flow path of the liquid between the flow path forming member and the substrate; an electrode configured to generate a flow of the liquid; and a wiring, which is arranged so as to be brought into contact with the flow path forming member, and is configured to supply electric power to the electrode, in which the flow path forming member contains an organic material, and in which the electrode and the wiring are each formed of a conductive adhesive layer containing at least one of conductive diamond-like carbon or tin-doped indium oxide.
    Type: Application
    Filed: September 19, 2018
    Publication date: March 28, 2019
    Inventors: Masafumi Morisue, Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Ryo Kasai, Tomoko Kudo, Takashi Sugawara
  • Publication number: 20190092012
    Abstract: A liquid ejection head including a substrate, an energy generating element which is provided on the substrate and is used for ejecting a liquid, a flow passage forming member which includes an ejection orifice, which ejects the liquid, and which forms a flow passage of the liquid between the flow passage forming member and the substrate, and an electrode which is provided on a surface of the flow passage forming member which adjoins the flow passage and which generates a flow of the liquid, in which at least a portion of the electrode is covered within the flow passage forming member.
    Type: Application
    Filed: September 18, 2018
    Publication date: March 28, 2019
    Inventors: Masafumi Morisue, Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Ryo Kasai, Tomoko Kudo, Takashi Sugawara
  • Publication number: 20190092019
    Abstract: A liquid ejection head is manufactured by forming on a substrate an energy generating element for ejecting a liquid, an integrated circuit for driving the energy generating element, a supply port for the liquid so as to penetrate through the substrate, an electrode for generating a liquid flow, and a flow path forming member having an ejection orifice for ejecting the liquid such that a flow path for the liquid is formed between the substrate and the flow path forming member. The electrode is formed over high and low of a stepped shape formed on the substrate in at least one step selected from the steps of forming the energy generating element, forming the integrated circuit and forming the supply port.
    Type: Application
    Filed: September 20, 2018
    Publication date: March 28, 2019
    Inventors: Ryo Kasai, Takashi Sugawara, Masafumi Morisue, Takuro Yamazaki, Yoshiyuki Nakagawa, Kazuhiro Yamada, Tomoko Kudo
  • Publication number: 20180361734
    Abstract: A liquid ejection head includes a substrate including an electrically insulating film, an energy generating element provided on the substrate and configured to generate energy used to eject a liquid, a flow path formed through the substrate and communicating with an ejection port configured to eject a liquid, and a wiring layer formed in the electrically insulating film of the substrate, used to drive the energy generating element, provided apart from a wall defining the flow path, and provided to surround the flow path in a plan view of the substrate.
    Type: Application
    Filed: June 12, 2018
    Publication date: December 20, 2018
    Inventors: Tomoko Kudo, Takaaki Yamaguchi, Keiji Tomizawa, Masaki Oikawa, Yoshihiro Hamada, Masataka Sakurai
  • Patent number: 9597893
    Abstract: If the shape of an element substrate is a parallelogram, a trapezoid, an uneven shape, or the like, there is no region where a driver transistor corresponding to a heater in the vicinity of an end portion of the element substrate is arranged, and thus the heater cannot be arranged near the end portion. The layout arrangement of driving circuits suitable for the substrate shape is required while suppressing an increase in the area of the element substrate. In an embodiment of this invention, the diffusion layer of the drain electrode of a driver transistor for driving a heater is divided in a direction perpendicular to that in which heaters are arranged, and the divided portions are connected to form one driver transistor. The divided portions are arranged stepwise.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: March 21, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoko Kudo, Ryo Kasai
  • Patent number: 9579888
    Abstract: A substrate includes a first and a second element arrays in each of which a plurality of elements is arrayed along a first direction of the substrate, a first and a second pad arrays in which a plurality of pads is arrayed along respective two opposite sides extending along a second direction of the substrate, a reception circuit configured to receive data for driving the elements, a data circuit configured to generate data corresponding to the first and the second element array, respectively based on the received data, a signal generation circuit configured to generate a period signal for determining a drive period of the elements based on the generated data, and an output circuit configured to output information related to the substrate.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: February 28, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tomoko Kudo, Tatsuo Furukawa, Nobuyuki Hirayama, Ryo Kasai, Kimiyuki Hayasaki
  • Publication number: 20160193837
    Abstract: If the shape of an element substrate is a parallelogram, a trapezoid, an uneven shape, or the like, there is no region where a driver transistor corresponding to a heater in the vicinity of an end portion of the element substrate is arranged, and thus the heater cannot be arranged near the end portion. The layout arrangement of driving circuits suitable for the substrate shape is required while suppressing an increase in the area of the element substrate. In an embodiment of this invention, the diffusion layer of the drain electrode of a driver transistor for driving a heater is divided in a direction perpendicular to that in which heaters are arranged, and the divided portions are connected to form one driver transistor. The divided portions are arranged stepwise.
    Type: Application
    Filed: December 11, 2015
    Publication date: July 7, 2016
    Inventors: Tomoko Kudo, Ryo Kasai
  • Patent number: 9073310
    Abstract: A printing element substrate, comprising a plurality of printing elements which form a plurality of groups, a first generating unit configured to generate a threshold signal set for each of the plurality of groups and a ramp signal, based on an externally received digital signal, and second generating units, which are arranged in correspondence with the respective groups, configured to generate, based on the ramp signal and the threshold signal, enable signals for setting a period during which the printing element is driven.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: July 7, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoko Kudo, Nobuyuki Hirayama, Kengo Umeda
  • Patent number: 9044935
    Abstract: An embodiment of this invention relates to an element substrate that implements size reduction of the element substrate and simplification of the arrangement as well as a highly-reliable print operation, a printhead using the same, and a printing apparatus including the printhead. In the element substrate according to this embodiment, the slope of a ramp wave is changed to generate a plurality of pulses using one reference voltage. The slope of the ramp wave can be changed by changing the mirror ratio or the capacitance of a comparator as well as by changing the resistance of a DAC.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: June 2, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoko Kudo, Ryo Kasai, Nobuyuki Hirayama
  • Publication number: 20150002566
    Abstract: An embodiment of this invention relates to an element substrate that implements size reduction of the element substrate and simplification of the arrangement as well as a highly-reliable print operation, a printhead using the same, and a printing apparatus including the printhead. In the element substrate according to this embodiment, the slope of a ramp wave is changed to generate a plurality of pulses using one reference voltage. The slope of the ramp wave can be changed by changing the mirror ratio or the capacitance of a comparator as well as by changing the resistance of a DAC.
    Type: Application
    Filed: June 10, 2014
    Publication date: January 1, 2015
    Inventors: Tomoko Kudo, Ryo Kasai, Nobuyuki Hirayama
  • Patent number: 8876242
    Abstract: A print head is provided that well preserves ink characteristics upon printing by way of performing effective ink preliminary heating. The print head has heaters and ejection openings formed at locations corresponding to the heaters. Viewed from the side from which ink is ejected, a sub-heater is established in the print head between the ink supply port and the print elements so as to surround the ink supply port.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: November 4, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuuji Tamaru, Yoshiyuki Imanaka, Koichi Omata, Hideo Tamura, Takaaki Yamaguchi, Kousuke Kubo, Ryoji Oohashi, Toshio Negishi, Tatsuo Furukawa, Nobuyuki Hirayama, Ryo Kasai, Tomoko Kudo
  • Patent number: 8632150
    Abstract: A printhead substrate comprises: a plurality of printing elements arrayed in a predetermined direction; first logic circuits arranged in correspondence with respective groups each assigned to a predetermined number of adjacent printing elements, and configured to select a printing element to be driven from the printing elements belonging to each of the groups; driving circuits configured to drive the printing elements based on signals output from the first logic circuits; second logic circuits configured to supply externally input printing data to the first logic circuits corresponding to the respective groups; and electricity storage units arranged in the respective groups, connected to a power supply line for supplying power to at least one of the first logic circuits, the second logic circuits, and the driving circuits, and configured to store charges in accordance with a voltage applied through the power supply line.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: January 21, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryo Kasai, Nobuyuki Hirayama, Tomoko Kudo, Tatsuo Furukawa
  • Publication number: 20130314464
    Abstract: A printing element substrate, comprising a plurality of printing elements which form a plurality of groups, a first generating unit configured to generate a threshold signal set for each of the plurality of groups and a ramp signal, based on an externally received digital signal, and second generating units, which are arranged in correspondence with the respective groups, configured to generate, based on the ramp signal and the threshold signal, enable signals for setting a period during which the printing element is driven.
    Type: Application
    Filed: May 10, 2013
    Publication date: November 28, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoko Kudo, Nobuyuki Hirayama, Kengo Umeda
  • Patent number: 8371668
    Abstract: A recording element substrate which is provided with a first recording element group and a second recording element group, each group including a plurality of recording elements.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: February 12, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryo Kasai, Tatsuo Furukawa, Nobuyuki Hirayama, Tomoko Kudo