Patents by Inventor Akira Sakamoto

Akira Sakamoto 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: 9505237
    Abstract: There is provided a drying device. A controller is configured to control a laser intensity so that the laser intensity becomes lower than a drying intensity set as an intensity for drying a liquid droplet when a printing part printed in advance on a recording medium is included in an illumination range of a laser element on an image formation surface of the recording medium, the laser element configured to illuminate laser to the liquid droplet ejected on the image formation surface of the recording medium in accordance with an image.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: November 29, 2016
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takeshi Zengo, Akira Sakamoto, Naoki Morita, Takuma Ishihara
  • Patent number: 9502862
    Abstract: A light emitting elements drive control device includes: a detection unit that detects drive voltages and drive currents of a plurality of respective semiconductor light emitting elements arranged in a width direction of a recording medium; a calculation unit that calculates generated heat amounts of the respective semiconductor light emitting elements from heating-raised temperatures of the respective semiconductor light emitting elements determined based on the drive voltages and the drive currents detected by the detection unit, and calculates actual emission light quantities of the semiconductor light emitting elements from differences between the generated heat amounts of the semiconductor light emitting elements and input heat amounts corresponding to powers supplied to the semiconductor light emitting elements, respectively; and a correction unit that corrects differences between the actual emission light quantities of the semiconductor light emitting elements calculated by the calculation unit and req
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: November 22, 2016
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takashi Fujimoto, Chikaho Ikeda, Jun Isozaki, Akira Sakamoto
  • Patent number: 9487028
    Abstract: A drying device includes: a drying unit that includes a laser light source group in which a plurality of laser light sources are arranged two-dimensionally and that dries ink placed on a recording medium as a result of ejecting of ink droplets from an ejecting unit by irradiating the ink with laser light; a control unit that divides the laser light source group into unit-of-control laser light source groups that are arranged in a crossing direction that crosses a feeding direction of the recording medium and each of which has, as a unit of control, a plurality of laser light sources arranged in the feeding direction of the recording medium, and controls the drying unit using laser light irradiation profiles that are set for the respective unit-of-control laser light source groups; and a setting unit as defined herein.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: November 8, 2016
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yukari Motosugi, Takeshi Zengo, Takuma Ishihara, Jun Isozaki, Akira Sakamoto
  • Patent number: 9457415
    Abstract: A moisture removing method disclosed removes moisture contained in a dielectric film provided on one end surface of an optical fiber. This moisture removing method causes near infrared light to enter the optical fiber through the other end surface to heat moisture in the dielectric film with use of the near infrared light.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: October 4, 2016
    Assignee: FUJIKURA LTD.
    Inventor: Akira Sakamoto
  • Patent number: 9419159
    Abstract: Prepared is an n? type semiconductor substrate 1 having a first principal surface 1a and a second principal surface 1b opposed to each other, and having a p+ type semiconductor region 3 formed on the first principal surface 1a side. At least a region opposed to the p+ type semiconductor region 3 in the second principal surface 1b of the n? type semiconductor substrate 1 is irradiated with a pulsed laser beam to form an irregular asperity 10. After formation of the irregular asperity 10, an accumulation layer 11 with an impurity concentration higher than that of the n? type semiconductor substrate 1 is formed on the second principal surface 1b side of the n? type semiconductor substrate 1. After formation of the accumulation layer 11, the n? type semiconductor substrate 1 is subjected to a thermal treatment.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: August 16, 2016
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Akira Sakamoto, Takashi Iida, Koei Yamamoto, Kazuhisa Yamamura, Terumasa Nagano
  • Publication number: 20160233643
    Abstract: A light emitting elements drive control device includes: a detection unit that detects drive voltages and drive currents of a plurality of respective semiconductor light emitting elements arranged in a width direction of a recording medium; a calculation unit that calculates generated heat amounts of the respective semiconductor light emitting elements from heating-raised temperatures of the respective semiconductor light emitting elements determined based on the drive voltages and the drive currents detected by the detection unit, and calculates actual emission light quantities of the semiconductor light emitting elements from differences between the generated heat amounts of the semiconductor light emitting elements and input heat amounts corresponding to powers supplied to the semiconductor light emitting elements, respectively; and a correction unit that corrects differences between the actual emission light quantities of the semiconductor light emitting elements calculated by the calculation unit and req
    Type: Application
    Filed: September 8, 2015
    Publication date: August 11, 2016
    Inventors: Takashi Fujimoto, Chikaho Ikeda, Jun Isozaki, Akira Sakamoto
  • Publication number: 20160227677
    Abstract: An electric power converter includes a semiconductor module, a reactor having a coil and a core, and a cooler for cooling the semiconductor module and the reactor. The cooler has a coolant passage member having a coolant flow path. The coil of the reactor has an exposed coil portion exposed from the core. The exposed coil portion is in contact with the coolant passage member. The core has a core end face disposed flush with the exposed coil portion, and both the exposed coil portion and the core end face are in surface contact with the coolant passage member.
    Type: Application
    Filed: January 29, 2016
    Publication date: August 4, 2016
    Applicant: DENSO CORPORATION
    Inventors: Naoki HIRASAWA, Ryota TANABE, Tetsuya MATSUOKA, Kazuya TAKEUCHI, Akira SAKAMOTO
  • Publication number: 20160214402
    Abstract: A light emitting elements drive control device includes: a supplying unit that supplies a common power source voltage to a plurality of light emitting elements whose light emission quantities are controlled individually by current controls; a determining unit that determines voltage ranges capable of assuring proper current control operations on the individual light emitting elements based on drive voltages for the respective light emitting elements that vary as the current controls are performed; and a setting unit that sets the power source voltage to be supplied from the supplying unit from a common voltage range of the voltage ranges determined by the determining unit.
    Type: Application
    Filed: August 19, 2015
    Publication date: July 28, 2016
    Inventors: Eigo Nakagawa, Akira Sakamoto, Chikaho Ikeda, Jun Isozaki
  • Publication number: 20160216105
    Abstract: An optical axis angle inspection device is provided with a first camera and a screen which are disposed in front of a laser distance meter, is provided with a point light source on the screen, and is provided with a second camera disposed behind the laser distance meter. An image of the laser distance meter is captured by the first camera, and the height of the point light source is fitted to the height of the laser distance meter on the basis of the captured image. Then, an image of the point light source is captured by the second camera, and a difference in height between the centroid of the captured image and the point light source is specified. The optical axis angle of the laser distance meter is calculated from the difference in height and the distance from the screen to the laser distance meter.
    Type: Application
    Filed: June 3, 2014
    Publication date: July 28, 2016
    Inventors: Akira SAKAMOTO, Tatsuya SAKAI, Yoshitaka HIRAI, Hirotaka ITOH, Takayuki OGAWA
  • Patent number: 9385151
    Abstract: A manufacturing method for an edge illuminated type photodiode has: a process of forming an impurity-doped layer of a first conductivity type in each of device forming regions in a semiconductor substrate; a process of forming an impurity-doped layer of a second conductivity type in each of the device forming regions; a process of forming a trench extending in a direction of thickness of the semiconductor substrate from a principal surface, at a position of a boundary between adjacent device forming regions, by etching to expose side faces of the device forming regions; a process of forming an insulating film on the exposed side faces of the device forming regions; a process of forming an electrode for each corresponding impurity-doped layer on the principal surface side of the semiconductor substrate; and a process of implementing singulation of the semiconductor substrate into the individual device forming regions.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: July 5, 2016
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Hiroshi Oguri, Yoshitaka Ishikawa, Akira Sakamoto, Tomoya Taguchi, Yoshimaro Fujii
  • Publication number: 20160167398
    Abstract: A drying device includes: a drying unit that includes a laser light source group in which a plurality of laser light sources are arranged two-dimensionally and that dries ink placed on a recording medium as a result of ejecting of ink droplets from an ejecting unit by irradiating the ink with laser light; a control unit that divides the laser light source group into unit-of-control laser light source groups that are arranged in a crossing direction that crosses a feeding direction of the recording medium and each of which has, as a unit of control, a plurality of laser light sources arranged in the feeding direction of the recording medium, and controls the drying unit using laser light irradiation profiles that are set for the respective unit-of-control laser light source groups; and a setting unit as defined herein.
    Type: Application
    Filed: May 12, 2015
    Publication date: June 16, 2016
    Inventors: Yukari Motosugi, Takeshi Zengo, Takuma Ishihara, Jun Isozaki, Akira Sakamoto
  • Patent number: 9340041
    Abstract: There is provided a drying device including a plurality of surface-emitting laser elements each having a plurality of laser elements and arranged along a feeding direction of a recording medium. First power supplying pads are respectively provided at both ends of an electrode on a laser illumination surface of each surface-emitting laser element in a width direction of the recording medium and a second power supplying pad is provided at one end of the electrode on a backside of each surface-emitting laser element in the feeding direction. The respective first power supplying pads of the surface-emitting laser element arranged at an upstream-side in the feeding direction and the second power supplying pad of the surface-emitting laser element arranged at a downstream-side in the feeding direction are connected to each other by wires.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: May 17, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takehiro Niitsu, Jun Isozaki, Yasuhiro Ogasawara, Hiroyuki Tsukuni, Akira Sakamoto, Naoki Morita
  • Patent number: 9340042
    Abstract: A drying device includes: an irradiation unit that irradiates, with laser light, a printing medium onto which ink droplets have been ejected from a droplets ejecting unit; and a control unit that controls the irradiation unit so that a temperature of ink on the printing medium becomes an ink target temperature that is determined using a thermal deformation temperature of the printing medium as a reference in case the thermal deformation temperature of the printing medium is lower than or equal to an ink drying temperature, and becomes an ink target temperature that is determined using the ink drying temperature as a reference in case the thermal deformation temperature of the printing medium is higher than the ink drying temperature.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: May 17, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takeshi Zengo, Takuma Ishihara, Akira Sakamoto, Yukari Motosugi, Jun Isozaki
  • Patent number: 9321282
    Abstract: A drying device includes a laser element that irradiates an irradiation region with a laser, the irradiation region including a plurality of droplets on a recording medium which are ejected by an ejection unit, ejecting droplets according to an image, along a transport direction of the recording medium and a direction crossing the transport direction.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: April 26, 2016
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Jun Isozaki, Akira Sakamoto, Takehiro Niitsu, Yasuhiro Ogasawara, Takeshi Zengo, Naoki Morita
  • Publication number: 20160099395
    Abstract: An LED leadframe or LED substrate includes a main body portion having a mounting surface for mounting an LED element thereover. A reflection metal layer serving as a reflection layer for reflecting light from the LED element is disposed over the mounting surface of the main body portion. The reflection metal layer comprises an alloy of platinum and silver or an alloy of gold and silver. The reflection metal layer efficiently reflects light emitted from the LED element and suppresses corrosion due to the presence of a gas, thereby capable of maintaining reflection characteristics of light from the LED element.
    Type: Application
    Filed: December 10, 2015
    Publication date: April 7, 2016
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Kazunori ODA, Akira SAKAMOTO, Yoshinori MURATA, Kenzaburo KAWAI, Koichi SUZUKI, Megumi OISHI
  • Publication number: 20160082748
    Abstract: There is provided a drying device. A controller is configured to control a laser intensity so that the laser intensity becomes lower than a drying intensity set as an intensity for drying a liquid droplet when a printing part printed in advance on a recording medium is included in an illumination range of a laser element on an image formation surface of the recording medium, the laser element configured to illuminate laser to the liquid droplet ejected on the image formation surface of the recording medium in accordance with an image.
    Type: Application
    Filed: January 30, 2015
    Publication date: March 24, 2016
    Inventors: Takeshi Zengo, Akira Sakamoto, Naoki Morita, Takuma Ishihara
  • Patent number: 9293499
    Abstract: A semiconductor light detecting element is provided with a silicon substrate having a semiconductor layer, and an epitaxial semiconductor layer grown on the semiconductor layer and having a lower impurity concentration than the semiconductor layer; and conductors provided on a surface of the epitaxial semiconductor layer. A photosensitive region is formed in the epitaxial semiconductor layer. Irregular asperity is formed at least in a surface opposed to the photosensitive region in the semiconductor layer. The irregular asperity is optically exposed.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: March 22, 2016
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Mitsuhito Mase, Akira Sakamoto, Takashi Suzuki, Tomohiro Yamazaki, Yoshimaro Fujii
  • Patent number: 9278625
    Abstract: A power supply apparatus for vehicles is provided. This apparatus includes a battery mounted on a vehicle as well as first and second power transferring means and a power conversion unit. The first power transferring means transfers power between the battery and a first power supply section placed outside the vehicle, in a state where the battery is electrically connected to the power supply section. The second power transferring means transfers power between the battery and the power supply section placed outside the vehicle, in a state where the battery is electromagnetically connected to a second power supply section. The power conversion unit is used commonly in both the first and second power transferring means and used for transferring the power between the battery and the first power supply section and for transferring the power between the battery and the second power supply section.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: March 8, 2016
    Assignee: DENSO CORPORATION
    Inventors: Kazuyoshi Obayashi, Akira Sakamoto
  • Publication number: 20160059583
    Abstract: There is provided a drying device including a plurality of surface-emitting laser elements each having a plurality of laser elements and arranged along a feeding direction of a recording medium. First power supplying pads are respectively provided at both ends of an electrode on a laser illumination surface of each surface-emitting laser element in a width direction of the recording medium and a second power supplying pad is provided at one end of the electrode on a backside of each surface-emitting laser element in the feeding direction. The respective lust power supplying pads of the surface-emitting laser element arranged at an upstream-side in the feeding direction and the second power supplying pad of the surface-emitting laser element arranged at a downstream-side in the feeding direction are connected to each other by wires.
    Type: Application
    Filed: January 26, 2015
    Publication date: March 3, 2016
    Inventors: Takehiro Niitsu, Jun Isozaki, Yasuhiro Ogasawara, Hiroyuki Tsukuni, Akira Sakamoto, Naoki Morita
  • Patent number: 9263315
    Abstract: An LED leadframe or LED substrate includes a main body portion having a mounting surface for mounting an LED element thereover. A reflection metal layer serving as a reflection layer for reflecting light from the LED element is disposed over the mounting surface of the main body portion. The reflection metal layer comprises an alloy of platinum and silver or an alloy of gold and silver. The reflection metal layer efficiently reflects light emitted from the LED element and suppresses corrosion due to the presence of a gas, thereby capable of maintaining reflection characteristics of light from the LED element.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: February 16, 2016
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Kazunori Oda, Akira Sakamoto, Yoshinori Murata, Kenzaburo Kawai, Koichi Suzuki, Megumi Oishi