Patents by Inventor Hirofumi Kawaguchi

Hirofumi Kawaguchi 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: 20200003853
    Abstract: A radio frequency power supply according to an embodiment is a radio frequency power supply that amplifies an input signal including application timing of a radio frequency magnetic field and waveform information and that supplies the amplified input signal to a radio frequency coil. The radio frequency power supply includes an amplifier and a controlling unit. The amplifier amplifies the input signal and to output an amplified signal. The controlling circuity varies power supply voltage used by the amplifier for the amplification of the input signal, in accordance with the input signal.
    Type: Application
    Filed: July 1, 2019
    Publication date: January 2, 2020
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hirofumi YAMAKI, Susumu KAWAGUCHI, Mitsuyuki MURAKAMI, Hisanori SUZUKI, Hajime TANAKA
  • Publication number: 20190389370
    Abstract: A semiconductor device has a position estimation part calculating an estimated position of a mobile at a scheduled time to project a message image, based on movement information of the mobile, a reference image signal output part deciding a reference area being an area to project a reference image, based on a relative positional relation between the mobile at the estimated position and the projection area, and outputting a reference image signal being a signal of the reference image, a test image signal acquisition part acquiring a test image signal being a signal of an image obtained by imaging the reference area with the reference image projected thereon, and an image adjustment part adjusting the message image signal, based on the reference image signal and the test image signal.
    Type: Application
    Filed: June 7, 2019
    Publication date: December 26, 2019
    Inventors: Hirofumi KAWAGUCHI, Koji YASUDA, Akihide TAKAHASHI
  • Publication number: 20190389368
    Abstract: To provide a semiconductor device which suppresses a message image projected by a mobile from varying from a desired position. A semiconductor device has a first area decision part which decides a first area onto which a message image is projected, based on movement information of a mobile. The semiconductor device has a delay period calculation part which calculates a delay period being a period from a first time for projecting the message image onto the first area to a second time when the message image is projectable. Also, the semiconductor device has a second area decision part which adjusts the first area, based on the delay period to decide a second area. Further, the semiconductor device has an image signal conversion part which converts a message image signal according to the second area.
    Type: Application
    Filed: June 7, 2019
    Publication date: December 26, 2019
    Inventors: Koji YASUDA, Hirofumi Kawaguchi, Akihide Takahashi
  • Publication number: 20190378955
    Abstract: A light-emitting device includes: a semiconductor stacked body including: an n-type semiconductor layer having an n-side contact surface, a light-emitting layer located on a region of the n-type semiconductor layer surrounding the n-side contact surface in a top-view, and a p-type semiconductor layer provided on the light-emitting layer; an n-side electrode contacting the n-side contact surface; a p-side electrode located on and contacting the p-type semiconductor layer; and an insulating film opposing a side surface of the light-emitting layer; wherein a first gap portion is located between the insulating film and the side surface of the light-emitting layer such that the side surface of the light-emitting layer is exposed at the first gap portion.
    Type: Application
    Filed: May 29, 2019
    Publication date: December 12, 2019
    Applicant: NICHIA CORPORATION
    Inventor: Hirofumi KAWAGUCHI
  • Patent number: 10417973
    Abstract: An image processing device includes a luminance modulator operable to receive a video input signal and operable to calculate a video output signal to be supplied to a display panel, a peak value detector operable to calculate a peak value as a maximum luminance in a prescribed region of the video input signal, a histogram detector operable to calculate frequency distribution about a luminance value of the video input signal in the prescribed region, a peak Automatic contrast level (ACL) control gain calculation unit operable to calculate a peak ACL control gain with which luminance of each pixel of the video input signal is amplified, based on the ratio of the peak value to a maximum possible value of the video output signal, and a pattern-adaptive gamma characteristic calculation unit operable to calculate a luminance modulation gain.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: September 17, 2019
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Hirofumi Kawaguchi
  • Patent number: 10396249
    Abstract: A semiconductor light emitting element having: a semiconductor laminated body; a full surface electrode containing an Ag provided on an upper surface of the p-type semiconductor layer; a cover electrode that covers a surface of the full surface electrode, is provided to contact on the upper surface of the p-type semiconductor layer at an outer edge of the full surface electrode, and is made of an Al-based metal material; a p-side electrode that is provided on a portion of a surface of the cover electrode; a metal oxide film that covers other surfaces of the cover electrode and contains an oxide of a metal material forming the cover electrode; and an insulation film that is made of an oxide and covers a surface of the metal oxide film, is provided.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: August 27, 2019
    Assignee: NICHIA CORPORATION
    Inventors: Hirofumi Kawaguchi, Akinori Yoneda, Hisashi Kasai, Kazuki Kashimoto, Masafumi Itasaka
  • Publication number: 20190197730
    Abstract: A semiconductor device includes an imaging time decision circuit that decides an imaging estimated time for a camera, a subject decision circuit that obtains distance data containing information related to a relative position between the camera and an object at every preliminarily-set time, and decides a subject on the basis of the distance data in accordance, a moving vector calculation circuit that calculates the moving vector of the subject on the basis of a plurality of pieces of distance data obtained at a plurality of different times, and an imaging condition decision circuit that calculates subject position estimation data that is a relative position between the camera and the subject at the imaging estimated time, decides an imaging conditions at the imaging estimated time, and instructs the camera to image at the imaging estimated time in accordance with the decided imaging conditions.
    Type: Application
    Filed: November 14, 2018
    Publication date: June 27, 2019
    Inventors: Koji YASUDA, Hirofumi KAWAGUCHI, Koichi TSUKAMOTO
  • Publication number: 20190074402
    Abstract: A method of manufacturing a light emitting device includes: a first wafer preparation step including preparing, on a first substrate, m first wafers (where m?2), each of the first wafers comprising a first semiconductor layer, an active layer, and a second semiconductor layer; a second wafer preparation step including bonding a second substrate with the second semiconductor layer of a first of the m first wafers and then removing the first substrate from the first wafer, so as to form a second wafer in which the first semiconductor layer is exposed; and a first bonding step including bonding the first semiconductor layer exposed at the surface of the second wafer and the second semiconductor layer of a second of the m first wafers together using a light-transmissive conductive layer, and then removing a first substrate of the second of the m first wafers.
    Type: Application
    Filed: August 28, 2018
    Publication date: March 7, 2019
    Applicant: NICHIA CORPORATION
    Inventor: Hirofumi KAWAGUCHI
  • Publication number: 20180102460
    Abstract: A semiconductor light emitting element having: a semiconductor laminated body; a full surface electrode containing an Ag provided on an upper surface of the p-type semiconductor layer; a cover electrode that covers a surface of the full surface electrode, is provided to contact on the upper surface of the p-type semiconductor layer at an outer edge of the full surface electrode, and is made of an Al-based metal material; a p-side electrode that is provided on a portion of a surface of the cover electrode; a metal oxide film that covers other surfaces of the cover electrode and contains an oxide of a metal material forming the cover electrode; and an insulation film that is made of an oxide and covers a surface of the metal oxide film, is provided.
    Type: Application
    Filed: December 13, 2017
    Publication date: April 12, 2018
    Inventors: Hirofumi KAWAGUCHI, Akinori YONEDA, Hisashi KASAI, Kazuki KASHIMOTO, Masafumi ITASAKA
  • Publication number: 20180040282
    Abstract: An image processing device includes a luminance modulator operable to receive a video input signal and operable to calculate a video output signal to be supplied to a display panel, a peak value detector operable to calculate a peak value as a maximum luminance in a prescribed region of the video input signal, a histogram detector operable to calculate frequency distribution about a luminance value of the video input signal in the prescribed region, a peak Automatic contrast level (ACL) control gain calculation unit operable to calculate a peak ACL control gain with which luminance of each pixel of the video input signal is amplified, based on the ratio of the peak value to a maximum possible value of the video output signal, and a pattern-adaptive gamma characteristic calculation unit operable to calculate a luminance modulation gain.
    Type: Application
    Filed: October 16, 2017
    Publication date: February 8, 2018
    Inventor: Hirofumi KAWAGUCHI
  • Patent number: 9876147
    Abstract: A semiconductor light emitting element having: a semiconductor laminated body; a full surface electrode containing an Ag provided on an upper surface of the p-type semiconductor layer; a cover electrode that covers a surface of the full surface electrode, is provided to contact on the upper surface of the p-type semiconductor layer at an outer edge of the full surface electrode, and is made of an Al-based metal material; a p-side electrode that is provided on a portion of a surface of the cover electrode; a metal oxide film that covers other surfaces of the cover electrode and contains an oxide of a metal material forming the cover electrode; and an insulation film that is made of an oxide and covers a surface of the metal oxide film, is provided.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: January 23, 2018
    Assignee: NICHIA CORPORATION
    Inventors: Hirofumi Kawaguchi, Akinori Yoneda, Hisashi Kasai, Kazuki Kashimoto, Masafumi Itasaka
  • Patent number: 9818372
    Abstract: A computer includes an image processing apparatus, the image processing apparatus includes a transformation unit that transforms color information on an input image signal on the basis of a transformation rule; a correction range calculation unit that calculates a correction range in a predetermined color space on the basis of a positional relationship between source coordinates and destination coordinates in the color space; and a point-based transfer distance calculation unit that calculates transformation destination coordinates at respective points within the correction range on the basis of the positional relationship between the source coordinates and the destination coordinates, and a positional relationship between coordinates at the respective points within the correction range and the source coordinates to reflect the calculated transformation destination coordinates on the transformation rule.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: November 14, 2017
    Assignee: Renesas Electronics Corporation
    Inventor: Hirofumi Kawaguchi
  • Patent number: 9805663
    Abstract: The image processing device includes a luminance modulator, a backlight control gain adjustment unit, a peak value detector, and a histogram detector. The peak value detector calculates a peak value as a maximum luminance value in a prescribed region of the video input signal inputted. The histogram detector calculates frequency distribution about the luminance value of the video input signal. Based on the peak value calculated by the peak value detector and the frequency distribution calculated by the histogram detector, the luminance modulator converts a luminance value of the video input signal into a luminance value of the video output signal and outputs the video output signal, for every pixel. The backlight control gain adjustment unit creates the backlight control signal based on the peak value.
    Type: Grant
    Filed: July 11, 2015
    Date of Patent: October 31, 2017
    Assignee: Renesas Electronics Corporation
    Inventor: Hirofumi Kawaguchi
  • Publication number: 20170305071
    Abstract: An electric heating device includes a control portion adapted to control electric energy supplied to a heater, based on a before-heating temperature, which is a temperature of at least one of an object, the heater and a heat dissipation portion before the heater generates heat, the control portion is adapted to calculate the temperature of the object, based on the before-heating temperature and the electric energy supplied to the heater.
    Type: Application
    Filed: March 30, 2015
    Publication date: October 26, 2017
    Inventors: Hirofumi Kawaguchi, Yasuo Hashimoto
  • Patent number: 9645532
    Abstract: A fixing device fixes a toner image formed on a recording medium to the recording medium. The fixing device includes a fixing roller, a pressure roller, and a first heater. The pressure roller is disposed opposite to the fixing roller to form a fixing nip therebetween. The first heater performs non-contact heating on the toner image that has passed through the fixing nip and that has been fixed to the recording medium to melt the toner image. The first heater is disposed adjacent to a conveyance path through which the recording medium that has passed through the fixing nip is conveyed.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: May 9, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Hirofumi Kawaguchi
  • Patent number: 9601668
    Abstract: A light emitting device has a plurality of light emitting elements that are arranged with gaps between the devices on a mounting board in a first direction, a wavelength-conversion member that covers the plurality of light emitting elements, a light reflective resin. Each light emitting element has an n-type semiconductor layer, an active layer provided in a part of the n-type semiconductor layer, and a p-type semiconductor layer provided on the active layer. In a second direction which is perpendicular to the first direction, an n-side electrodes are provided at least in regions at both ends of the n-type semiconductor layer, and a p-side electrode is provided on the surface of the p-type semiconductor layer, and wherein in the second direction, the wavelength-conversion member is positioned to approximately align both sides with both active layer side faces, or to dispose its sides outward of the active layer side faces.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: March 21, 2017
    Assignee: NICHIA CORPORATION
    Inventors: Hirofumi Kawaguchi, Akinori Yoneda, Kazuki Kashimoto
  • Publication number: 20170062686
    Abstract: A manufacturing method of a flip-chip nitride semiconductor light emitting element includes a step of providing a nitride semiconductor light emitting element structure; a protective layer forming step; a first resist pattern forming step; a protective layer etching step; a first metal layer forming step; a first resist pattern removing step; a third metal layer forming step; a second resist pattern forming step; a second metal layer forming step; a second resist pattern removing step; and a third metal layer removing step.
    Type: Application
    Filed: November 14, 2016
    Publication date: March 2, 2017
    Applicant: NICHIA CORPORATION
    Inventors: Akinori YONEDA, Hirofumi KAWAGUCHI, Kouichiroh DEGUCHI
  • Patent number: 9530950
    Abstract: A manufacturing method of a flip-chip nitride semiconductor light emitting element includes a step of providing a nitride semiconductor light emitting element structure; a protective layer forming step; a first resist pattern forming step; a protective layer etching step; a first metal layer forming step; a first resist pattern removing step; a third metal layer forming step; a second resist pattern forming step; a second metal layer forming step; a second resist pattern removing step; and a third metal layer removing step.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: December 27, 2016
    Assignee: NICHIA CORPORATION
    Inventors: Akinori Yoneda, Hirofumi Kawaguchi, Kouichiroh Deguchi
  • Publication number: 20160370742
    Abstract: A fixing device fixes a toner image formed on a recording medium to the recording medium. The fixing device includes a fixing roller, a pressure roller, and a first heater. The pressure roller is disposed opposite to the fixing roller to form a fixing nip therebetween. The first heater performs non-contact heating on the toner image that has passed through the fixing nip and that has been fixed to the recording medium to melt the toner image. The first heater is disposed adjacent to a conveyance path through which the recording medium that has passed through the fixing nip is conveyed.
    Type: Application
    Filed: May 26, 2016
    Publication date: December 22, 2016
    Applicant: KYOCERA Document Solutions Inc.
    Inventor: Hirofumi KAWAGUCHI
  • Patent number: 9461210
    Abstract: A light emitting element includes a semiconductor stacked layer body having an n-type semiconductor layer, an active layer, and a p-type semiconductor layer in this order, and a plurality of exposed portions defined at an upper surface side of the semiconductor stacked layer body, the plurality of exposed portions respectively exposing a part of the n-type semiconductor layer, a p-side electrode arranged in a first region and electrically connected with an upper surface of the p-type semiconductor layer and, arranged at one corner above the p-type semiconductor layer in a plan view, and an n-side electrode electrically integrally connected to the plurality of exposed portions and arranged in a different region in a plan view.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: October 4, 2016
    Assignee: NICHIA CORPORATION
    Inventors: Koichi Takenaga, Hirofumi Kawaguchi, Kazuki Kashimoto