Patents by Inventor Seiichi Ishihara

Seiichi Ishihara 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: 7738754
    Abstract: An optical component having an incident surface and a light exiting surface wherein where a collimated light is incident on the incident surface, the light intensity of the outgoing light from the light exiting surface is anisotropic along an azimuth angle of 30° to the normal and a ratio of the maximum intensity value and the minimum intensity value is 1.2 or more and a plurality of irregular lens rows are aligned on one of the incident surface and the light exiting surface to form an angle within a range of ?30° to +30° on the incident surface or light exiting surface.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: June 15, 2010
    Assignees: Sakari Co., Ltd., LTec Trading Co., Ltd.
    Inventors: Seiichi Ishihara, Takashi Okada
  • Patent number: 7514813
    Abstract: A power supply system for supplying power to a load is provided. The system comprises power-line carriers for supplying power to the load, and a plurality of power supply units the outputs of which are parallelly connected to power-line carriers. Each of the power supply unit comprises a generator; an inverter for converting a voltage generated by the generator into an AC voltage and outputting the AC voltage; an inverter control unit for controlling the inverter, and a connection apparatus for connecting the AC voltage outputted from the inverter to the power-line carriers. The inverter controller comprises a load sharing adjuster for adjusting a shared load current supplied from the power supply unit, so that at least one of the power supply units in operation can operated at its rating condition, thereby realizing an efficiency operation.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: April 7, 2009
    Assignees: Ebara Corporation, Ebara Densan Ltd.
    Inventors: Terence McKelvey, Eishi Marui, Masahiro Miyamoto, Motoyasu Sato, Tadashi Kataoka, Tai Furuya, Seiichi Ishihara, Takahide Ozawa, Noboru Kinoshita, Shaojun Zheng
  • Publication number: 20070285941
    Abstract: [PROBLEMS] An optical component in which the viewing angle can be widened while sustaining a high luminance and the defect of a display can be made inconspicuous, and a backlight employing the optical component. [MEANS FOR SOLVING PROBLEMS] When a substantially collimated light impinges on the plane of incidence (9), an outgoing light from the outgoing plane (10) exhibits anisotropy in its intensity along an azimuth of 30° to normal to the outgoing plane (10), the anisotropy being such that the ratio between a highest intensity and a lowest intensity in the intensity distribution of outgoing light intensity along the azimuth of 30° is set to not smaller than 1.2.
    Type: Application
    Filed: July 16, 2004
    Publication date: December 13, 2007
    Inventors: Seiichi Ishihara, Takashi Okada
  • Patent number: 7233082
    Abstract: To provide an interconnecting power generation system which can detect an abnormality in the utility power supply and can be isolated from a utility power system and can prevent damage to a turbogenerator.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: June 19, 2007
    Assignee: Ebara Densan Ltd.
    Inventors: Tai Furuya, Tadashi Kataoka, Terence McKelvey, Eishi Marui, Motoyasu Sato, Takahide Ozawa, Shaojun Zheng, Seiichi Ishihara, Noboru Kinoshita
  • Patent number: 7061211
    Abstract: A gas turbine generating apparatus according to the present invention comprises a gas turbine capable of a high-speed operation, a permanent-magnet-type generator driven at a high speed by the gas turbine, an inverter device (5) for converting alternating-current power generated by the generator into commercial alternating-current power, and a system-interconnection device (9) for interconnecting output of the inverter device to a commercial AC power supply system (10). The system-interconnection device controls the inverter device based on voltage of the commercial AC power supply system as a criterion such that output current of the inverter device is in phase with the voltage or out of phase with the voltage by a constant phase difference.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: June 13, 2006
    Assignees: Ebara Corporation, Ebara Densan Ltd.
    Inventors: Motoyasu Satoh, Seiichi Ishihara, Noboru Kinoshita, Takahide Ozawa, Shao-jun Zheng, Terence Mckelvey, Tadashi Kataoka
  • Publication number: 20060108988
    Abstract: A power supply system for supplying power to a load is provided. The system comprises power-line carriers for supplying power to the load, and a plurality of power supply units the outputs of which are parallelly connected to power-line carriers. Each of the power supply unit comprises a generator; an inverter for converting a voltage generated by the generator into an AC voltage and outputting the AC voltage; an inverter control unit for controlling the inverter, and a connection apparatus for connecting the AC voltage outputted from the inverter to the power-line carriers. The inverter controller comprises a load sharing adjuster for adjusting a shared load current supplied from the power supply unit, so that at least one of the power supply units in operation can operated at its rating condition, thereby realizing an efficiency operation.
    Type: Application
    Filed: August 21, 2003
    Publication date: May 25, 2006
    Applicants: Ebara Corporation, Ebara Densan Ltd.
    Inventors: Terence McKelvey, Eishi Marui, Masahiro Miyamoto, Motoyasu Sato, Tadashi Kataoka, Tai Furuya, Seiichi Ishihara, Takahide Ozawa, Noboru Kinoshita, Shaojun Zheng
  • Patent number: 6979914
    Abstract: A power generating apparatus has a power generator 4 for generating AC power, a gas turbine engine 2 for driving the power generator 4, and an inverter device 5 for converting the AC power into commercial AC power. The power generating apparatus includes an interconnection switch S1 for connecting an output of the inverter device 5 with a commercial AC power supply system, a first voltage detector 46 for detecting a DC power supply voltage Vdc-in of the inverter device 5, and a second voltage detector 33, 45 for detecting a full-wave rectification voltage of the commercial AC power supply system. The power generating apparatus also includes an interconnection control part 18 for closing the interconnection switch S1 when the DC power supply voltage of the inverter device 5 exceeds the full-wave rectification voltage of the commercial AC power supply system.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: December 27, 2005
    Assignees: Ebara Corporation, Ebara Densan Ltd.
    Inventors: Terence McKelvey, Eishi Marui, Masahiro Miyamoto, Tai Furuya, Tadashi Kataoka, Motoyasu Sato, Seiichi Ishihara, Takahide Ozawa, Noboru Kinoshita, Shaojun Zheng
  • Publication number: 20050179420
    Abstract: A gas turbine generating apparatus according to the present invention comprises a gas turbine capable of a high-speed operation, a permanent-magnet-type generator driven at a high speed by the gas turbine, an inverter device (5) for converting alternating-current power generated by the generator into commercial alternating-current power, and a system-interconnection device (9) for interconnecting output of the inverter device to a commercial AC power supply system (10). The system-interconnection device controls the inverter device based on voltage of the commercial AC power supply system as a criterion such that output current of the inverter device is in phase with the voltage or out of phase with the voltage by a constant phase difference.
    Type: Application
    Filed: March 15, 2005
    Publication date: August 18, 2005
    Applicants: Ebara Corporation, EBARA DENSAN LTD.
    Inventors: Motoyasu Satoh, Seiichi Ishihara, Noboru Kinoshita, Takahide Ozawa, Shao-Jun Zheng, Terence Mckelvey, Tadashi Kataoka
  • Patent number: 6888263
    Abstract: A gas turbine generating apparatus according to the present invention comprises a gas turbine capable of a high-speed operation, a permanent-magnet-type generator driven at a high speed by the gas turbine, an inverter device (5) for converting alternating-current power generated by the generator into commercial alternating-current power, and a system-interconnection device (9) for interconnecting output of the inverter device to a commercial AC power supply system (10). The system-interconnection device controls the inverter device based on voltage of the commercial AC power supply system as a criterion such that output current of the inverter device is in phase with the voltage or out of phase with the voltage by a constant phase difference.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: May 3, 2005
    Assignees: Ebara Corporation, Ebara Densan Ltd.
    Inventors: Motoyasu Satoh, Seiichi Ishihara, Noboru Kinoshita, Takahide Ozawa, Shao-jun Zheng, Terence Mckelvey, Tadashi Kataoka
  • Publication number: 20040264089
    Abstract: To provide an interconnecting power generation system which can detect an abnormality in the utility power supply and can be isolated from a utility power system and can prevent damage to a turbogenerator.
    Type: Application
    Filed: December 9, 2003
    Publication date: December 30, 2004
    Applicants: EBARA CORPORATION, EBARA DENSAN LTD.
    Inventors: Tai Furuya, Tadashi Kataoka, Terence McKelvey, Eishi Marui, Motoyasu Sato, Takahide Ozawa, Shaojun Zheng, Seiichi Ishihara, Noboru Kinoshita
  • Publication number: 20040222640
    Abstract: A power generating apparatus has a power generator 4 for generating AC power, a gas turbine engine 2 for driving the power generator 4, and an inverter device 5 for converting the AC power into commercial AC power. The power generating apparatus includes an interconnection switch S1 for connecting an output of the inverter device 5 with a commercial AC power supply system, a first voltage detector 46 for detecting a DC power supply voltage Vdc-in of the inverter device 5, and a second voltage detector 33, 45 for detecting a full-wave rectification voltage of the commercial AC power supply system. The power generating apparatus also includes an interconnection control part 18 for closing the interconnection switch S1 when the DC power supply voltage of the inverter device 5 exceeds the full-wave rectification voltage of the commercial AC power supply system.
    Type: Application
    Filed: February 20, 2004
    Publication date: November 11, 2004
    Applicants: EBARA CORPORATION, Ebara Densan Ltd.
    Inventors: Terence McKelvey, Eishi Marui, Masahiro Miyamoto, Tai Furuya, Tadashi Kataoka, Motoyasu Sato, Seiichi Ishihara, Takahide Ozawa, Noboru Kinoshita, Shaojun Zheng
  • Publication number: 20040178640
    Abstract: A gas turbine generating apparatus according to the present invention comprises a gas turbine capable of a high-speed operation, a permanent-magnet-type generator driven at a high speed by the gas turbine, an inverter device (5) for converting alternating-current power generated by the generator into commercial alternating-current power, and a system-interconnection device (9) for interconnecting output of the inverter device to a commercial AC power supply system (10). The system-interconnection device controls the inverter device based on voltage of the commercial AC power supply system as a criterion such that output current of the inverter device is in phase with the voltage or out of phase with the voltage by a constant phase difference.
    Type: Application
    Filed: April 6, 2004
    Publication date: September 16, 2004
    Inventors: Motoyasu Satoh, Seiichi Ishihara, Noboru Kinoshita, Takahide Ozawa, Shao-jun Zheng, Terence Mckelvey, Tadashi Kataoka
  • Patent number: 4868632
    Abstract: In an MONOS type nonvolatile semiconductor memory comprising a channel forming semiconductor region between source and drain regions in a surface of a substrate; a tunnel insulating film formed on the channel forming semiconductor region in the surface of the substrate, the tunnel insulating film permitting charge-injection; a silicon nitride film formed as a second insulating film on the tunnel insulating film; a silicon oxide film formed as a third insulating film; and a conductive electrode formed on the silicon oxide film, the silicon nitride film has a composition close to a stoichiometric value of Si.sub.3 N.sub.4 at a portion near an interface with the tunnel insulating film and has a composition of excess silicon at a portion of the thickness of the same film except near the interface with the tunnel insulating film.
    Type: Grant
    Filed: July 8, 1988
    Date of Patent: September 19, 1989
    Assignees: Director General of Agency of Industrial Science and Technology, Research Development Corporation of Japan, Citizen Watch Co., Ltd.
    Inventors: Yutaka Hayashi, Itsunari Hayabuchi, Tatsuo Tsuchiya, Seiichi Ishihara
  • Patent number: 4818867
    Abstract: An optical information processing device includes a light receiving and driving circuit including photo voltaic elements adapted to receive an incident light and to produce a drive voltage, and an optical shutter driven by the drive voltage produced by the light receiving and driving circuit. With this structure, various basic logical operations are performed by the device according to the present invention. As a feature of the invention, the device receives a pair of incident lights having a complementary relation in strength with each other and produces a pair of output lights from the optical shutters which also are complementary in strength with each other. Thus, the possibility of errors in logical operations is greatly reduced.
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: April 4, 1989
    Assignees: Agency of Industrial Science and Technology, Ministry of International Trade and Industry, Citizen Watch Co., Ltd.
    Inventors: Yutaka Hayashi, Seiichi Ishihara, Hisato Hiraishi