Patents by Inventor Eiji Nakai

Eiji Nakai 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: 10374388
    Abstract: An optical semiconductor device includes: an n-type semiconductor substrate; an n-type cladding layer provided on the n-type semiconductor substrate; an active layer of a semiconductor laser provided on the n-type cladding layer; a waveguide layer of a waveguide provided on the n-type cladding layer and having a side facing a side of the active layer; a p-type cladding layer provided on the active layer and the waveguide layer; and a middle layer provided between the side of the active layer and the side of the waveguide layer, provided between the n-type cladding layer and the waveguide layer, not provided on the active layer, and having a band gap greater than a band gap of the waveguide layer.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: August 6, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Naoki Nakamura, Eiji Nakai
  • Patent number: 10296131
    Abstract: A monitoring and controlling apparatus includes a functional cabinet, functional units, and a control cabinet. The functional cabinet includes a plurality of frames and a door at an opening of at least a part of the frames, each frame having a predetermined accommodation size. Each functional unit is detachably accommodated in respective frame and including a circuit and a component for a function of the functional unit. The control cabinet is disposed next to the functional cabinet, and configured to monitor and control the functional units.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: May 21, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Atsuo Haryu, Akimasa Nakai, Shinji Sakurai, Susumu Yoshizawa, Katsuya Kasai, Kenichi Hosoya, Eiji Watanabe, Yusuke Tsuboi, Kazuaki Omomo, Toshio Tagawa
  • Patent number: 9948064
    Abstract: A method of manufacturing a semiconductor device includes a step of forming a mesa portion including an active layer above a substrate, and an n-type layer above the active layer, a step of forming a current confinement portion on left and right of the mesa portion, the current confinement portion including a p-type current blocking layer, an n-type current blocking layer above the p-type current blocking layer, and an i-type or p-type current blocking layer above the n-type current blocking layer, and a p-type doping step of diffusing p-type impurities into the i-type or p-type current blocking layer, an upper portion of the n-type current blocking layer, and left and right portions of the n-type layer to change the upper portion of the n-type current blocking layer and the left and right portions of the n-type layer to p-type semiconductors.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: April 17, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroaki Tsuchiya, Harunaka Yamaguchi, Eiji Nakai
  • Publication number: 20180034238
    Abstract: An optical semiconductor device includes: an n-type semiconductor substrate; an n-type cladding layer provided on the n-type semiconductor substrate; an active layer of a semiconductor laser provided on the n-type cladding layer; a waveguide layer of a waveguide provided on the n-type cladding layer and having a side facing a side of the active layer; a p-type cladding layer provided on the active layer and the waveguide layer; and a middle layer provided between the side of the active layer and the side of the waveguide layer, provided between the n-type cladding layer and the waveguide layer, not provided on the active layer, and having a band gap greater than a band gap of the waveguide layer.
    Type: Application
    Filed: March 9, 2017
    Publication date: February 1, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Naoki NAKAMURA, Eiji NAKAI
  • Publication number: 20170365981
    Abstract: A method of manufacturing a semiconductor device includes a step of forming a mesa portion including an active layer above a substrate, and an n-type layer above the active layer, a step of forming a current confinement portion on left and right of the mesa portion, the current confinement portion including a p-type current blocking layer, an n-type current blocking layer above the p-type current blocking layer, and an i-type or p-type current blocking layer above the n-type current blocking layer, and a p-type doping step of diffusing p-type impurities into the i-type or p-type current blocking layer, an upper portion of the n-type current blocking layer, and left and right portions of the n-type layer to change the upper portion of the n-type current blocking layer and the left and right portions of the n-type layer to p-type semiconductors.
    Type: Application
    Filed: January 12, 2017
    Publication date: December 21, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroaki TSUCHIYA, Harunaka YAMAGUCHI, Eiji NAKAI
  • Patent number: 9464585
    Abstract: An exhaust gas recirculation control device of an engine is provided. The device includes: an exhaust turbocharger having a turbine disposed in an exhaust passage and a compressor disposed in an intake passage; a low-pressure EGR passage connecting a part of the exhaust passage downstream of the turbine to a part of the intake passage upstream of the compressor; a low-pressure EGR valve disposed in the low-pressure EGR passage and for changing a cross-sectional area of the low-pressure EGR passage; an exhaust shutter valve disposed downstream of the connected part of the exhaust passage to the low-pressure EGR passage, and for changing a cross-sectional area of the exhaust passage; a valve control device for controlling openings of the low-pressure EGR valve and the exhaust shutter valve; and a gear range detector for detecting a gear range of a transmission of a vehicle in which the engine is installed.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: October 11, 2016
    Assignee: Mazda Motor Corporation
    Inventors: Kenji Tanimura, Kota Maekawa, Eiji Nakai, Motoshi Kataoka, Masanobu Kanno
  • Patent number: 9464586
    Abstract: An exhaust gas recirculation control device of an engine is provided. The device includes: an exhaust turbocharger having a turbine disposed in an exhaust passage and a compressor disposed in an intake passage; an intercooler disposed in the intake passage downstream of the compressor; a low-pressure EGR passage connecting the exhaust passage downstream of the turbine to the intake passage upstream of the compressor; a low-pressure EGR valve disposed in the low-pressure EGR passage and for changing a cross-sectional area thereof; a high-pressure EGR passage connecting the exhaust passage upstream of the turbine to the intake passage downstream of the intercooler; a high-pressure EGR valve disposed in the high-pressure EGR passage and for changing a cross-sectional area thereof; a valve control device for controlling openings of the low-pressure and high-pressure EGR valves; and a gear range detector for detecting a gear range of a transmission.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: October 11, 2016
    Assignee: Mazda Motor Corporation
    Inventors: Kota Maekawa, Kenji Tanimura, Eiji Nakai, Motoshi Kataoka, Masanobu Kanno
  • Patent number: 9058001
    Abstract: An image forming apparatus includes a toner image forming unit that forms and continuously transfers a toner image based on image data onto a transported sheet from the front to the rear in a sheet transport direction as the sheet is transported, a fixing unit positioned downstream of the toner image forming unit in the transport direction and that fixes the transferred toner image onto the sheet, an image determining unit that determines whether the formed toner image is a scattering toner image that causes toner scattering during the transfer, and a speed controlling unit that controls, when it is determined that the toner image is a scattering toner image, a transport speed of the sheet and a transfer speed of the toner image to the sheet such that the speeds are slower than those when it is determined that the toner image is not a scattering toner image.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: June 16, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Narumasa Sato, Eiji Nakai, Katsuyuki Kitajima, Makoto Kamisaki, Toyofumi Inoue, Takafumi Koide, Masataka Kuribayashi, Yoshinari Ueno, Yoshifumi Eri
  • Publication number: 20150089938
    Abstract: An exhaust gas recirculation control device of an engine is provided. The device includes: an exhaust turbocharger having a turbine disposed in an exhaust passage and a compressor disposed in an intake passage; a low-pressure EGR passage connecting a part of the exhaust passage downstream of the turbine to a part of the intake passage upstream of the compressor; a low-pressure EGR valve disposed in the low-pressure EGR passage and for changing a cross-sectional area of the low-pressure EGR passage; an exhaust shutter valve disposed downstream of the connected part of the exhaust passage to the low-pressure EGR passage, and for changing a cross-sectional area of the exhaust passage; a valve control device for controlling openings of the low-pressure EGR valve and the exhaust shutter valve; and a gear range detector for detecting a gear range of a transmission of a vehicle in which the engine is installed.
    Type: Application
    Filed: August 27, 2014
    Publication date: April 2, 2015
    Inventors: Kenji Tanimura, Kota Maekawa, Eiji Nakai, Motoshi Kataoka, Masanobu Kanno
  • Publication number: 20150089941
    Abstract: An exhaust gas recirculation control device of an engine is provided. The device includes: an exhaust turbocharger having a turbine disposed in an exhaust passage and a compressor disposed in an intake passage; an intercooler disposed in the intake passage downstream of the compressor; a low-pressure EGR passage connecting the exhaust passage downstream of the turbine to the intake passage upstream of the compressor; a low-pressure EGR valve disposed in the low-pressure EGR passage and for changing a cross-sectional area thereof; a high-pressure EGR passage connecting the exhaust passage upstream of the turbine to the intake passage downstream of the intercooler; a high-pressure EGR valve disposed in the high-pressure EGR passage and for changing a cross-sectional area thereof; a valve control device for controlling openings of the low-pressure and high-pressure EGR valves; and a gear range detector for detecting a gear range of a transmission.
    Type: Application
    Filed: August 27, 2014
    Publication date: April 2, 2015
    Inventors: Kota Maekawa, Kenji Tanimura, Eiji Nakai, Motoshi Kataoka, Masanobu Kanno
  • Patent number: 8815483
    Abstract: A magenta toner includes a binder resin containing a polyester resin having a dodecenylsuccinic acid structure as a constituent unit, and a solid solution of C.I. Pigment Violet 19 and C.I. Pigment Red 122, the magenta toner having an amount of the solid solution of from 2% by mass to 30% by mass based on the total mass of the toner.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: August 26, 2014
    Assignee: Fuji Xerox., Ltd.
    Inventors: Akira Matsumoto, Yusuke Ikeda, Eiji Nakai
  • Publication number: 20140112677
    Abstract: An image forming apparatus includes a toner image forming unit that forms and continuously transfers a toner image based on image data onto a transported sheet from the front to the rear in a sheet transport direction as the sheet is transported, a fixing unit positioned downstream of the toner image forming unit in the transport direction and that fixes the transferred toner image onto the sheet, an image determining unit that determines whether the formed toner image is a scattering toner image that causes toner scattering during the transfer, and a speed controlling unit that controls, when it is determined that the toner image is a scattering toner image, a transport speed of the sheet and a transfer speed of the toner image to the sheet such that the speeds are slower than those when it is determined that the toner image is not a scattering toner image.
    Type: Application
    Filed: July 5, 2013
    Publication date: April 24, 2014
    Inventors: Narumasa SATO, Eiji Nakai, Katsuyuki Kitajima, Makoto Kamisaki, Toyofumi Inoue, Takafumi Koide, Masataka Kuribayashi, Yoshinari Ueno, Yoshifumi Eri
  • Patent number: 8397503
    Abstract: Two turbochargers are arranged vertically near a one side of a crank-shaft direction at a one-side face of an engine body so that the large-size turbocharger is located above the small-sized turbocharger, and an exhaust-gas purification device is arranged an open space made on the other side of the crank-shaft direction so that its exhaust inlet is located above and its outlet is located below. Accordingly, the turbochargers and the exhaust-gas purification device can be arranged compactly and the layout of some devices around the engine can be facilitated.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: March 19, 2013
    Assignee: Mazda Motor Corporation
    Inventors: Yasushi Niwa, Atsuhiro Hatabu, Takashi Sasada, Eiji Nakai
  • Publication number: 20120183894
    Abstract: A magenta toner includes a binder resin containing a polyester resin having a dodecenylsuccinic acid structure as a constituent unit, and a solid solution of C.I. Pigment Violet 19 and C.I. Pigment Red 122, the magenta toner having an amount of the solid solution of from 2% by mass to 30% by mass based on the total mass of the toner.
    Type: Application
    Filed: September 1, 2011
    Publication date: July 19, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Akira MATSUMOTO, Yusuke IKEDA, Eiji NAKAI
  • Publication number: 20120000441
    Abstract: A diesel engine for a vehicle comprises an engine body mounted in the vehicle having a plurality of cylinders that is supplied with fuel, a plurality of fuel injection valves for directly injecting the fuel into the cylinders, and an injection control module for controlling a mode of injecting the fuel into the cylinders through the fuel injection valves. The injection control module sets a fuel injection amount per cylinder at least according to a load on the engine body, performs a main injection, and performs at least one pre-injection where fuel is injected prior to the main injection. The injection control module further executes a cylinder-cutoff operation mode where the fuel supplies to the cylinder or the cylinders are stopped when the engine body is under a low load condition where the fuel injection amount per cylinder is below a predetermined amount.
    Type: Application
    Filed: June 15, 2011
    Publication date: January 5, 2012
    Applicant: Mazda Motor Corporation
    Inventors: Eiji Nakai, Sadaharu Matsumoto, Naotoshi Shirahashi, Shinichi Morinaga
  • Publication number: 20100313561
    Abstract: Two turbochargers are arranged vertically near a one side of a crank-shaft direction at a one-side face of an engine body so that the large-size turbocharger is located above the small-sized turbocharger, and an exhaust-gas purification device is arranged an open space made on the other side of the crank-shaft direction so that its exhaust inlet is located above and its outlet is located below. Accordingly, the turbochargers and the exhaust-gas purification device can be arranged compactly and the layout of some devices around the engine can be facilitated.
    Type: Application
    Filed: May 5, 2010
    Publication date: December 16, 2010
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Yasushi NIWA, Atsuhiro HATABU, Takashi SASADA, Eiji NAKAI
  • Patent number: 7505669
    Abstract: A content reproduction apparatus includes a hard disk. An MPEG-PS into which an I picture is intermittently inserted is circularly written into an MPEG file formed on the hard disk. In addition, index data capable of specifying at least the I picture is circularly written into an INDEX file formed on the hard disk. A CPU detects the I picture from a head portion of the MPEG-PS based on the index data stored in the INDEX file, and reproduces the MPEG-PS rendering the detected I picture the starting picture.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: March 17, 2009
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Eiji Nakai
  • Publication number: 20070012031
    Abstract: There is provided a method for fueling a diesel engine having a particulate filter in its exhaust system. The method comprises supplying a main fuel injection to generate a desired torque. It also comprises additionally supplying a first post fuel injection after the main fuel injection and a second post fuel injection after the first post fuel injection during a higher engine load condition. The method further comprises continuing to supply the main fuel injection and the first post fuel injection and stopping to supply the second post fuel injection during a lower engine load condition, if a vehicle cruise control is performed. Therefore, a noticeable torque disturbance can be eliminated.
    Type: Application
    Filed: July 11, 2006
    Publication date: January 18, 2007
    Applicant: Mazda Motor Corporation
    Inventors: Kenji Tanimura, Eiji Nakai, Masanori Sahara, Shinichi Morinaga, Kazunari Sasaki
  • Publication number: 20050271359
    Abstract: A content copying apparatus includes a flash memory. The flash memory stores attribute information for contents copied to a DVD, out of a plurality of contents recorded on a hard disk (HD). A deletion supporting screen based on such attribute information is displayed on a TV monitor. An operator determines through this screen whether or not each of the copied contents is necessary and, if none of the copied contents are necessary, performs an operation of collectively deleting all the copied contents. In response to this operation, a CPU issues to an HD drive an instruction for collectively deleting all the copied contents from the HD.
    Type: Application
    Filed: June 1, 2005
    Publication date: December 8, 2005
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventor: Eiji Nakai
  • Patent number: 6962140
    Abstract: A diesel engine control system and control method capable of conducting accurate fuel injection unaffected by variations in injector performance caused by differences among individual injectors or change with aging. The diesel engine control system includes an injector for directly injecting fuel into a combustion chamber of a diesel engine, injection quantity controller for controlling fuel injection quantity by varying a period of electric current supply to the injector, estimator for estimating that an electric current supply period when a prescribed (stable) combustion state is obtained is the current supply period for injecting the amount of fuel required for the prescribed combustion state, and control data correcting device for correcting control data of the injection quantity controller based on the estimated current supply period.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: November 8, 2005
    Assignee: Mazda Motor Corporation
    Inventors: Eiji Nakai, Naoki Okada, Tsunehiro Sato, Yoshiyuki Matsumoto, Masami Nakao, Masanori Sahara, Kouji Habu, Hiromu Sugano, Masaru Yamamoto, Tunehiro Mori