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: 20190308413
    Abstract: A liquid ejection head including first and second recording element substrates adjacent in a direction intersecting a relative movement direction include ejection opening rows that include ejection openings arranged in the intersecting direction. A straight line connecting the ejection openings in end portions on a second recording element substrate side in the first recording element substrate and a straight line connecting the ejection openings in end portions on a first recording element substrate side in the second recording element substrate are inclined towards a middle area side of the first recording element substrate, and arrangement intervals of the ejection openings in an end portion area on the second recording element substrate side of a first ejection opening row is larger than arrangement intervals of the ejection openings in an end portion area on the first recording element substrate side of a second ejection opening row.
    Type: Application
    Filed: April 1, 2019
    Publication date: October 10, 2019
    Inventors: Koichi Ishida, Shuzo Iwanaga, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Hammura, Takatsugu Moriya, Tomohiro Sato, Tatsuya Yamada, Tomoki Ishiwata, Ayako Iwasaki
  • Publication number: 20190299592
    Abstract: An image forming apparatus 101 capable of performing printing with a high image quality, and a control method of the image forming apparatus 101 are provided. For this purpose, a threshold value Dt is preliminarily set that allows printing without occurrence of blur, for each of preliminarily set monitoring areas A. In the case where a print duty for each of the monitoring areas A has exceeded the threshold value Dt, an ejection frequency of ink and conveying speed of a print medium are reduced in association therebetween.
    Type: Application
    Filed: March 15, 2019
    Publication date: October 3, 2019
    Inventors: Ayako Iwasaki, Yoshiyuki Nakagawa, Yoshihiro Hamada, Masashi Hayashi, Kentaro Muro, Yutaka Kano, Takahide Takeishi
  • Patent number: 10431617
    Abstract: There is provided a photoelectric conversion device in which a distance from a main surface to an inner surface of a first part of a dielectric film is smaller than a distance from the main surface to a top surface of a light shielding member, a distance from the main surface to an outer surface of the first part is smaller than a distance from the main surface to an outer surface of a second part of the dielectric film, an outer surface of a third part inclines to the top surface, a surface of a dielectric member inclines to the top surface, between the dielectric film and the top surface in a normal direction, and the dielectric member has a refractive index lower than a refractive index of the dielectric film.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: October 1, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiro Kawano, Yoshiyuki Nakagawa, Masao Ishioka, Takashi Okagawa
  • Patent number: 10427413
    Abstract: A liquid ejection head includes a plurality of liquid chambers each including an energy generating element that generates energy for ejecting a liquid, an ejection opening that ejects the liquid, and a liquid supply opening that supplies the liquid, the liquid flowing in a first direction in the plurality of liquid chambers, and the plurality of liquid chambers being arranged in a second direction that intersects the first direction, and a plurality of first side walls that extend in the first direction and that form walls on both sides of the plurality of liquid chambers. In the liquid ejection head, each of the plurality of first side walls includes a fragmenting portion that fragments each of the plurality of first side walls in the first direction.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: October 1, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akiko Saito, Shintaro Kasai, Yoshiyuki Nakagawa
  • Patent number: 10421276
    Abstract: A printing element substrate includes a substrate, an energy generating element, and an ejection-port formed member. The energy generating element is disposed on one surface of the substrate and configured to generate energy for use in ejecting liquid. The ejection-port formed member includes ejection ports that eject the liquid. A protrusion protruding toward inside of each of the ejection ports is provided on an inner surface of the ejection port. In a surface of the ejection-port formed member remote from the substrate, a tip portion of the protrusion is positioned closer to the substrate than an outer periphery of the ejection port.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: September 24, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akiko Saito, Shintaro Kasai, Yoshiyuki Nakagawa, Takatsugu Moriya, Koichi Ishida, Tatsuya Yamada, Shuzo Iwanaga, Ayako Iwasaki, Tomoki Ishiwata, Tomohiro Sato
  • Patent number: 10421287
    Abstract: A plurality of pressure chambers are formed in a circulation channel for liquid in order to array ejection ports in a high density in association with the circulation channel. The circulation channel is connected to a penetration supply path and a penetration recovery path that penetrate a substrate.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: September 24, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuro Yamazaki, Toru Nakakubo, Kazuhiro Yamada, Yoshiyuki Nakagawa, Yoshihiro Hamada, Koichi Ishida, Shingo Okushima
  • Publication number: 20190263128
    Abstract: A liquid ejection head includes an ejection opening; a passage in which an energy generation element is disposed; an ejection opening portion that allows communication between the ejection opening and the passage; a supply passage for allowing the liquid to flow into the passage; and an outflow passage for allowing the liquid to flow out to the outside. An expression of H0.34×P?0.66×W>1.7 is satisfied when a height of the passage is set to H, a length of the ejection opening portion is set to P, and a length of the ejection opening portion is set to W.
    Type: Application
    Filed: May 9, 2019
    Publication date: August 29, 2019
    Inventors: Shingo Okushima, Seiichiro Karita, Takatsuna Aoki, Noriyasu Nagai, Eisuke Nishitani, Yoshiyuki Nakagawa
  • Publication number: 20190263126
    Abstract: A recording apparatus includes: a recording unit that performs a recording by ejecting a liquid on a medium; a carriage that includes the recording unit and is movable in a width direction; a casing that has the carriage therein and constitutes an external appearance of the apparatus; an adapter that is mounted on an upper portion of the recording unit and accommodates the liquid to be supplied to the recording unit; at least one liquid accommodating unit that supplies the liquid to the adapter through a tube and includes a filling port into which the liquid can be filled ; and a waste liquid receiving unit that receives the liquid discharged as a waste liquid during a maintenance operation of the recording unit, in which the casing has a cover for covering both the liquid accommodating unit and the waste liquid receiving unit.
    Type: Application
    Filed: February 22, 2019
    Publication date: August 29, 2019
    Inventors: Yoshiyuki TANAKA, Atsuya HIRABAYASHI, Nobuhisa NOMOTO, Masahide NAKAGAWA
  • Publication number: 20190263138
    Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.
    Type: Application
    Filed: May 13, 2019
    Publication date: August 29, 2019
    Inventors: Yoshiyuki Nakagawa, Shintaro Kasai, Shuzo Iwanaga, Akiko Hammura, Koichi Ishida, Takatsugu Moriya
  • Publication number: 20190232653
    Abstract: A recording element board includes a discharge orifice configured to discharge liquid, a pressure chamber communicating with the discharge orifice, a recording element configured to generate thermal energy to cause bubbling of the liquid, the recording element being disposed in the pressure chamber facing the discharge orifice, and a substrate on which the recording element is formed. When the recording element is driven and the liquid of within the pressure chamber is discharged, a generated bubble communicates with the atmosphere. A discharge orifice projection region where the discharge orifice has been projected on the substrate includes a region includes a region extending beyond a heat-generating region projection region where the heat-generating region of the recording element has been projected on the substrate, the outline of the discharge orifice projection region is circumscribed by the outline of the heat-generating region projection region.
    Type: Application
    Filed: April 4, 2019
    Publication date: August 1, 2019
    Inventors: Takatsugu Moriya, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Hammura, Koichi Ishida, Tatsuya Yamada, Shinji Kishikawa, Takayuki Sekine, Shuzo Iwanaga
  • Publication number: 20190232675
    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: Application
    Filed: April 9, 2019
    Publication date: August 1, 2019
    Inventors: Toru Nakakubo, Takuro Yamazaki, Kazuhiro Yamada, Yoshiyuki Nakagawa
  • Patent number: 10363747
    Abstract: A liquid ejection head includes an ejection opening; a passage in which an energy generation element is disposed; an ejection opening portion that allows communication between the ejection opening and the passage; a supply passage for allowing the liquid to flow into the passage; and an outflow passage for allowing the liquid to flow out to the outside. An expression of H?0.34×P?0.66×W>1.7 is satisfied when a height of the passage is set to H, a length of the ejection opening portion is set to P, and a length of the ejection opening portion is set to W.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: July 30, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shingo Okushima, Seiichiro Karita, Takatsuna Aoki, Noriyasu Nagai, Eisuke Nishitani, Yoshiyuki Nakagawa
  • Publication number: 20190229216
    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: Application
    Filed: April 4, 2019
    Publication date: July 25, 2019
    Inventors: Takashi NAKAGAWA, Yoshiyuki KUROKAWA, Munehiro KOZUMA
  • Patent number: 10336091
    Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: July 2, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiyuki Nakagawa, Shintaro Kasai, Shuzo Iwanaga, Akiko Saito, Koichi Ishida, Takatsugu Moriya
  • Patent number: 10336088
    Abstract: An object is to provide a liquid ejection apparatus that allows suppression of a fluctuation in a pressure of a liquid in a flow path caused by a liquid delivery unit, enabling the liquid to be stably ejected through an ejection port. The liquid ejection apparatus including a liquid ejection head having an ejection port through which a liquid is ejected, a flow path configured to communicate with the ejection port, and a liquid delivery unit configured to feed the liquid to the flow path. A relation between an angular frequency ? of the liquid delivered from the liquid delivery unit, a coefficient of kinematic viscosity ? of the liquid, and an equal diameter a of at least a part of a section of an extra-head flow path in a direction normal to a direction in which ink flows satisfies ?(?/2?)×a>1.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: July 2, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoshiyuki Nakagawa
  • Publication number: 20190161068
    Abstract: A multiple drive source-equipped vehicle includes two temperature detection parts configured to detect a temperature of external air. When a heating operation is performed at a time of vehicle driving by a first drive source, the controller determines whether or not an external air temperature is lower than a predetermined value based on a detection temperature of a temperature detection part of which a detection temperature is higher among the two temperature detection parts. The controller continues a heating operation by a first heating apparatus when it is determined that the external air temperature is not lower than the predetermined value. The controller operates the second drive source and performs a heating operation by a second heating apparatus when it is determined that the external air temperature is lower than the predetermined value.
    Type: Application
    Filed: October 29, 2018
    Publication date: May 30, 2019
    Inventors: Yoshiyuki Takeuchi, Takehiro Abe, Masahiro Fujii, Toshikatsu Mori, Kazuhisa Nakagawa, Yusuke Fujii
  • Patent number: 10300707
    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: June 1, 2018
    Date of Patent: May 28, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Nakakubo, Takuro Yamazaki, Kazuhiro Yamada, Yoshiyuki Nakagawa
  • Publication number: 20190152229
    Abstract: An object is to provide a liquid ejection apparatus that allows suppression of a fluctuation in a pressure of a liquid in a flow path caused by a liquid delivery unit, enabling the liquid to be stably ejected through an ejection port. The liquid ejection apparatus including a liquid ejection head having an ejection port through which a liquid is ejected, a flow path configured to communicate with the ejection port, and a liquid delivery unit configured to feed the liquid to the flow path. A relation between an angular frequency ? of the liquid delivered from the liquid delivery unit, a coefficient of kinematic viscosity ? of the liquid, and an equal diameter a of at least a part of a section of an extra-head flow path in a direction normal to a direction in which ink flows satisfies ?/(?/2?)×a>1.
    Type: Application
    Filed: January 29, 2019
    Publication date: May 23, 2019
    Inventor: Yoshiyuki Nakagawa
  • Patent number: 10293607
    Abstract: A recording element board includes a discharge orifice configured to discharge liquid, a pressure chamber communicating with the discharge orifice, a recording element configured to generate thermal energy to cause bubbling of the liquid, the recording element being disposed in the pressure chamber facing the discharge orifice, and a substrate on which the recording element is formed. When the recording element is driven and the liquid of within the pressure chamber is discharged, a generated bubble communicates with the atmosphere. A discharge orifice projection region where the discharge orifice has been projected on the substrate includes a region includes a region extending beyond a heat-generating region projection region where the heat-generating region of the recording element has been projected on the substrate, the outline of the discharge orifice projection region is circumscribed by the outline of the heat-generating region projection region.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: May 21, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takatsugu Moriya, Shintaro Kasai, Yoshiyuki Nakagawa, Akiko Saito, Koichi Ishida, Tatsuya Yamada, Shinji Kishikawa, Takayuki Sekine, Shuzo Iwanaga
  • Patent number: 10286661
    Abstract: Disclosed is a liquid discharge method of discharging liquid with a liquid discharge head having a heating surface that contacts and heats the liquid and a discharge port that faces the heating surface and discharges the liquid. The method includes heating the liquid through the heating surface to generate a bubble such that the bubble communicates with an atmosphere, thereby discharging the liquid. The liquid that is being discharged from the discharge port includes a trailing portion. The trailing portion moves toward the heating surface in response to a reduction in volume of the bubble and contacts the heating surface. The method further includes heating the trailing portion through the heating surface while the trailing portion is in contact with the heating surface, thereby generating a bubble.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: May 14, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shintaro Kasai, Yoshiyuki Nakagawa, Akira Shibasaki, Masataka Sakurai, Ken Tsuchii, Akiko Hammura, Tatsurou Mori, Shinji Kishikawa