Patents by Inventor Yoshiyuki Nakagawa

Yoshiyuki Nakagawa 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).

  • Publication number: 20200198346
    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.
    Type: Application
    Filed: December 9, 2019
    Publication date: June 25, 2020
    Inventors: Ryo Kasai, Kazuhiro Yamada, Takuro Yamazaki, Yoshiyuki Nakagawa, Toru Nakakubo
  • Patent number: 10688792
    Abstract: A liquid ejection head includes a recording element substrate including an ejection orifice for ejecting liquid, a pressure chamber provided with an energy generating element for generating energy used to eject liquid, a liquid supply path for supplying liquid to the pressure chamber, and a liquid collecting path for collecting liquid from the pressure chamber. The liquid supply path, the pressure chamber, and the liquid collecting path of the recording element substrate constitute a part of a circulation path in which liquid flows in the order mentioned. The flow resistance RIn of a flow path including the liquid supply path at a supply side is greater than the flow resistance ROut of a flow path including the liquid collecting path at a collection side.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: June 23, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoshiyuki Nakagawa
  • Patent number: 10686080
    Abstract: A novel semiconductor device is provided. The semiconductor device includes a programmable logic device including a programmable logic element, a control circuit, and a detection circuit. The programmable logic device includes a plurality of contexts. The control circuit is configured to control selection of the contexts. The detection circuit is configured to output a signal corresponding to the amount of radiation. The control circuit is configured to switch between a first mode and a second mode in accordance with the signal corresponding to the amount of radiation. The first mode is a mode in which the programmable logic device performs processing by a multi-context method, and the second mode is a mode in which the programmable logic device performs processing using a majority signal of signals output from the logic element multiplexed by the plurality of contexts.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: June 16, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takashi Nakagawa, Yoshiyuki Kurokawa, Munehiro Kozuma
  • Patent number: 10682863
    Abstract: In a configuration having a circulation flow path in association with an ejection element, a liquid ejecting apparatus is capable of circulating liquid suitably and maintaining stable ejection operation while reducing liquid vaporization, a power supply capacity, and the effect of noise. For this purpose, in a configuration in which liquid delivery mechanisms that facilitate a flow in a flow path are prepared in association with pressure chambers, the liquid delivery mechanisms are divided into a plurality of blocks and the liquid delivery mechanisms included in each of the blocks are driven at different timings.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: June 16, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuro Yamazaki, Toru Nakakubo, Kazuhiro Yamada, Yoshiyuki Nakagawa, Akiko Hammura
  • Publication number: 20200176493
    Abstract: An imaging device capable of image processing is provided. The imaging device can retain analog data (image data) obtained by an image-capturing operation in a pixel and perform a product-sum operation of the analog data and a predetermined weight coefficient in the pixel to convert the data into binary data. When the binary data is taken in a neural network or the like, processing such as image recognition can be performed. Since enormous volumes of image data can be retained in pixels in the state of analog data, processing can be performed efficiently.
    Type: Application
    Filed: May 6, 2018
    Publication date: June 4, 2020
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Takayuki IKEDA, Yoshiyuki KUROKAWA, Shintaro HARADA, Hidetomo KOBAYASHI, Roh YAMAMOTO, Kiyotaka KIMURA, Takashi NAKAGAWA, Yusuke NEGORO
  • Publication number: 20200172443
    Abstract: A curved surface constituting a convex surface or a concave surface of each of a plurality of lenses includes at least a silicon nitride layer and another silicon nitride layer. An interlayer having a composition different from a composition of the silicon nitride layer and a composition of the other silicon nitride layer is arranged between the silicon nitride layer and the other silicon nitride layer, and a thickness of the interlayer is less than a thickness of the silicon nitride layer and a thickness of the other silicon nitride layer.
    Type: Application
    Filed: November 25, 2019
    Publication date: June 4, 2020
    Inventors: Yoshihisa Kawamura, Hideki Ina, Ryo Yoshida, Yukinobu Suzuki, Koji Hara, Yoshiyuki Nakagawa
  • Patent number: 10668736
    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.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: June 2, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiro Yamada, Toru Nakakubo, Yoshiyuki Nakagawa, Shingo Okushima
  • Patent number: 10672771
    Abstract: To provide a semiconductor device that can reduce power consumption and retain data for a long time and a memory device including the semiconductor device. The semiconductor device includes a word line divider, a memory cell, a first wiring, and a second wiring. The word line divider is electrically connected to the first wiring and the second wiring. The memory cell includes a first transistor with a dual-gate structure. A first gate of the first transistor is electrically connected to the first wiring, and a second gate of the first transistor is electrically connected to the second wiring. The word line divider supplies a high-level potential or a low-level potential to the first wiring and supplies a predetermined potential to the second wiring, whereby a threshold voltage of the first transistor is changed. With such a configuration, a semiconductor device that can reduce power consumption and retain data for a long time is driven.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: June 2, 2020
    Assignee: Semiconductor Energy Labortory Co., Ltd.
    Inventors: Fumika Akasawa, Hiroki Inoue, Takashi Nakagawa, Yoshiyuki Kurokawa
  • Patent number: 10661565
    Abstract: In a circulating system which circulates liquid within a liquid ejecting head, thickening of liquid in the vicinity of an ejection port section can be more securely suppressed. The ejection port section includes a first ejection port disposed at an upstream side with respect to an ejecting direction of ink and a second ejection port disposed at a downstream side with respect to the ejecting direction. The second ejection port includes an enlarged diameter portion whose diameter is enlarged in a radially outward manner from at least a part of an opening edge portion of the first ejection port.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: May 26, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiyuki Nakagawa, Takuro Yamazaki, Kazuhiro Yamada, Toru Nakakubo
  • Publication number: 20200154068
    Abstract: An imaging device with low power consumption is provided. It includes a pixel capable of outputting difference data between two different frames, a circuit determining the significance of the difference data, a circuit controlling power supply, an A/D converter, and the like; obtains image data and then obtains difference data; and shuts off power supply to the A/D converter and the like in the case where it is determined that there is no difference, and continues or restarts the power supply to the A/D converter and the like when it is determined that there is a difference. Determining the significance of the difference data can be performed row by row in a pixel array or at nearly the same time in all the pixels included in the pixel array.
    Type: Application
    Filed: December 16, 2019
    Publication date: May 14, 2020
    Inventors: Takashi NAKAGAWA, Munehiro KOZUMA, Yoshiyuki KUROKAWA, Takayuki IKEDA
  • Publication number: 20200139708
    Abstract: The liquid ejecting head includes a first individual flow path and a second individual flow path for supplying liquid to a pressure chamber, a first common flow path for supplying liquid to the first individual flow path, and a second common flow path for supplying liquid to the second individual flow path. A first circulation for causing liquid to flow in the order of the first individual flow path, the pressure chamber, and the second individual flow path and a second circulation for causing liquid to flow in the reverse order of the first circulation are switched. A flow path resistance of the first common flow path is designed to be less than a flow path resistance of the second common flow path and a flow path resistance of the first individual flow path is designed to be less than a flow path resistance of the second individual flow path.
    Type: Application
    Filed: December 10, 2019
    Publication date: May 7, 2020
    Inventors: Yoshiyuki Nakagawa, Kazuhiro Yamada, Yohei Nakamura, Naozumi Nabeshima
  • 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: 20200108605
    Abstract: A liquid ejection head includes a nozzle including an ejection port for ejecting a liquid for performing recording on a recording medium, and a pressure chamber in which an energy generating element that generates energy used for ejecting the liquid from the ejection port is disposed; and a heating unit that heats the liquid. In the liquid ejection head, the liquid in the pressure chamber is circulated to and from the outside of the pressure chamber, and an average number of preliminary ejections per nozzle during an operation period in which the recording is performed is equal to or greater than 0 and equal to or less than 20.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 9, 2020
    Inventors: Yasuhiko Osaki, Shingo Okushima, Yoshiyuki Nakagawa, Kazuhiro Yamada, Naozumi Nabeshima
  • Publication number: 20200108615
    Abstract: A liquid discharge head includes a discharge port; a flow passage; a discharge port part; a supply flow passage; and a recovery flow passage. The flow passage, the supply flow passage, and the recovery flow passage are configured such that the liquid inside the flow passage is capable of being circulated between the inside of the flow passage and the outside of the flow passage. An opening of the discharge port is configured such that a liquid surface of the liquid within the opening of the discharge port has a first region and that a second region, and a viscosity of the liquid in the first region is 1.2 or more times higher than a viscosity of the liquid in the second region.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 9, 2020
    Inventors: Shingo Okushima, Yoshiyuki Nakagawa, Kazuhiro Yamada, Yasuhiko Osaki, Naozumi Nabeshima
  • Publication number: 20200108604
    Abstract: A liquid ejection head includes an ejection orifice for ejecting a liquid; a flow path in which an energy generating element is disposed, generates an energy to be used for ejecting the liquid; a liquid inside the flow path; an ejection orifice part that allows the ejection orifice and the flow path to communicate with each other; a supply flow path for supplying the liquid from the outside; and a recovery flow path for recovering the liquid to the outside. The moisture content of the liquid is 65 wt % or less. The liquid inside the flow path is circulated between the inside and the outside of the flow path.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 9, 2020
    Inventors: Yoshiyuki Nakagawa, Kazuhiro Yamada, Shingo Okushima, Yasuhiko Osaki, Naozumi Nabeshima
  • Patent number: 10603910
    Abstract: A liquid discharge head includes a recording element configured to generate thermal energy and a discharge orifice disposed at a position facing the recording element. A bubble is generated in liquid by the thermal energy, liquid between the bubble and the discharge orifice is discharged from the discharge orifice by the pressure of the generated bubble, and the bubble communicates with the atmosphere on the outside of the discharge orifice.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: March 31, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshiyuki Nakagawa, Shintaro Kasai, Akiko Hammura, Shinji Kishikawa, Takayuki Sekine, Shuzo Iwanaga, Takatsugu Moriya, Koichi Ishida, Tatsuya Yamada
  • Patent number: 10589536
    Abstract: The present invention provides a liquid ejecting module capable of performing stable ejection operation while circulating and supplying fresh ink to the vicinity of ejection ports arranged in high density. To achieve this, a liquid ejecting module includes an element arranged face in which a plurality of ejecting elements are arranged, a circulation flow path including a supply flow path which supplies liquid to a pressure chamber and a collection flow path which collects liquid from the pressure chamber, and a liquid delivery mechanism provided in the circulation flow path for circulating liquid in the pressure chamber. The liquid delivery mechanism is located lower than the element arranged face.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: March 17, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Nakakubo, Takuro Yamazaki, Kazuhiro Yamada, Yoshiyuki Nakagawa
  • Patent number: 10583662
    Abstract: Ink is supplied to a print head through a pressure compensation mechanism and a common collection flow path in a case where a predetermined differential pressure or higher between a pressure in a common supply flow path of the print head and a pressure in a common collection flow path of the print head is generated. As a result, liquid refillability for the liquid ejection head is improved while retaining a liquid circulating function in the liquid ejection head so as to stabilize a liquid ejecting state in the liquid ejection head.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: March 10, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiro Yamada, Yohei Nakamura, Yoshiyuki Nakagawa, Naozumi Nabeshima
  • Patent number: 10576741
    Abstract: An ejection energy generating element is provided in a first pressure chamber so that a liquid in the first pressure chamber is ejected from an ejection port. A pressurization energy generating element is provided in a second pressure chamber so that the liquid in the first pressure chamber is pressurized. An opening area of a hole open to the second pressure chamber is smaller than an opening area of the ejection port.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: March 3, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akiko Hammura, Yoshiyuki Nakagawa