Patents by Inventor Koji Sakai

Koji Sakai 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: 10475184
    Abstract: From a plurality of medical images in time phases, a target site is extracted t least one medical image, a reference point is set on each of a target-site side, and a periphery side of the target site which are on across from each other over an outline of the extracted target site, and movement information for the reference points is calculated.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: November 12, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ryo Sakamoto, Koji Sakai, Gakuto Aoyama, Kiyohide Satoh
  • Patent number: 10465953
    Abstract: An air conditioning apparatus includes an electric compressor, an inverter, a temperature detection element, and an ECU. The electric compressor compresses a refrigerant drawn from a refrigerant intake port and discharges the refrigerant from a refrigerant discharge port. The inverter is integrated with the electric compressor so as to be cooled by the drawn refrigerant, and operates the electric compressor according to a control signal. The temperature detection element detects a temperature of the inverter. The ECU outputs a control signal to control the inverter. The ECU performs any one or both of a control for reducing a self-cooling amount of the electric compressor and a control for increasing a self-heat generation amount of the inverter with respect to the inverter when the temperature detected by the temperature detection element is lower than a predetermined reference temperature.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: November 5, 2019
    Assignee: DENSO CORPORATION
    Inventors: Teruaki Ohyama, Yuji Kamiya, Tomoyuki Sumi, Akitomo Yamanaka, Koji Sakai
  • Publication number: 20190332952
    Abstract: An image pickup system includes an input/output modeling section 24, the input/output modeling section 24 creating, as a population, an image group obtained when a specific target is photographed, (access image), and generating an inference model by using, as teacher data, sequential images selected from the image group created as the population, based on whether the specific target can be accessed, wherein each image of the image group is associated with date and time information and/or position information, and the input/output modeling section 24 generates an inference model for determining based on the date and time information and/or the position information whether a process to the specific target is good or bad.
    Type: Application
    Filed: April 24, 2019
    Publication date: October 31, 2019
    Applicant: OLYMPUS CORPORATION
    Inventors: Osamu NONAKA, Kazuhiko OSA, Yoichi YOSHIDA, Hirokazu NOZAKI, Masahiro FUJIMOTO, Hidekazu IWAKI, Koji SAKAI, Keiji OKADA, Yoshihisa OGATA
  • Patent number: 10362701
    Abstract: An electrical device includes two or more electrical components that configure an electrical circuit, at least one or more mechanical component that supports the two or more electrical components and is fixed to the two or more electrical components, and a position-adjustment structure that adjusts positions of the two or more electrical components relative to the one or more mechanical component with the at least two or more electrical components being united together, before the one or more mechanical component is fixed to the two or more electrical components.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: July 23, 2019
    Assignee: DENSO CORPORATION
    Inventor: Koji Sakai
  • Patent number: 10324582
    Abstract: Aspects of the invention are directed to a medical image display apparatus for displaying a thumbnail image corresponding to medical image data. The medical image data can be displayed in a display area upon selection of the thumbnail image. A display method of the medical image data in the display area can be determined, based on a designated position in the thumbnail image when the thumbnail image is selected by a user. Medical image data is displayed in the display area, according to the determined display method.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: June 18, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroyuki Sekiguchi, Gakuto Aoyama, Yutaka Emoto, Koji Sakai
  • Patent number: 10290096
    Abstract: A diagnosis support apparatus provides information for supporting medical diagnosis. The diagnosis support apparatus includes: a selection unit configured to select reference information as a clue for medical diagnosis from reference information candidates generated by using medical information; an obtaining unit configured to obtain an image feature corresponding to the reference information from a medical image; a specifying unit configured to specify a partial region of the medical image based on the reference information and the image feature; and a display control unit configured to control display of the medical image based on the selected reference information and the partial region.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: May 14, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masami Kawagishi, Koji Sakai
  • Publication number: 20190137387
    Abstract: An object of the present disclosure is to provide a device that can be manufactured in a simple process while ensuring a reduction in influence of noise on an electronic component. A device according to the present disclosure, accomplished to fulfill the object, includes light emitting element, light receiving element, electronic component to process signals sent from light receiving element, and optical component cover light emitting element and light receiving element. The device further includes reflector cover a lower surface of optical component and substrate. Reflector has first opening directly above light emitting element and second opening directly above light receiving element. Light emitting element, light receiving element, reflector, electronic component, and optical component are mounted over substrate. Reflector is electrically connected to substrate by a member disposed between reflector and substrate.
    Type: Application
    Filed: May 16, 2017
    Publication date: May 9, 2019
    Inventors: MASAHIKO OHBAYASHI, KOJI SAKAI, RYOSUKE MESHII, SHINICHI KISHIMOTO, AKIRA MATSUURA
  • Patent number: 10273958
    Abstract: A motor-driven compressor includes: a compression mechanism; an electric motor that drives the compression mechanism; a driver circuit unit disposed at a position to be cooled by refrigerant drawn by the compression mechanism; a temperature detection unit that detects a temperature of the driver circuit unit; and a motor control device disposed in the driver circuit unit to control the motor. The motor control device stores a predetermined drive pattern corresponding to a temperature characteristic of the driver circuit unit after starting the motor. When the temperature detected by the temperature detection unit at a time of starting the motor is higher than or equal to a predetermined temperature, the motor control device performs a limit drive control according to the predetermined drive pattern regardless of a drive state command to the motor.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: April 30, 2019
    Assignee: DENSO CORPORATION
    Inventor: Koji Sakai
  • Patent number: 10250174
    Abstract: A motor driving device for a motor having a stator and a rotor rotationally driven by an input of an AC voltage includes: an inverter circuit having multiple units corresponding to multiple phases respectively, each unit having a pair of a switching element and a reflux diode connected in anti-parallel to the switching element; and a control device controlling the inverter circuit to convert a DC voltage into the AC voltage and to output the AC voltage to the stator coil. The control device includes: a field weakening control unit adjusting the AC voltage to control a magnetic field of the stator coil to weaken a field magnetic flux of the rotor; and a regenerative current control unit switching an anti-regenerative side switching element to flow a regenerative current when the AC voltage stops while the field weakening control unit performs the field weakening control.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: April 2, 2019
    Assignee: DENSO CORPORATION
    Inventors: Koji Sakai, Akitomo Yamanaka
  • Publication number: 20190078812
    Abstract: An electric compressor includes a compression portion discharging a high pressure refrigerant by compressing a low-pressure drawn refrigerant, an electric motor driving the compression portion with a rotation of a rotor, a motor drive circuit driving the electric motor, an intermediate pressure port through which an intermediate pressure refrigerant is introduced into the compression portion, and a controller performing a rotation control of the rotor. When the controller stops the electric motor in a two-step compression mode in which the intermediate pressure refrigerant is introduced into the compression portion, the controller stops the rotor rotating by performing short-circuit braking on the electric motor and then fixes a rotational position of the rotor at a predetermined rotational position by performing direct current excitation on the electric motor.
    Type: Application
    Filed: September 5, 2016
    Publication date: March 14, 2019
    Applicant: DENSO CORPORATION
    Inventors: Teruaki OHYAMA, Koji SAKAI, Yuuji KAMIYA, Tomoyuki SUMI
  • Patent number: 10220677
    Abstract: An air conditioner for a vehicle has a compressor, a radiator, a first pressure reducer, a gas-liquid separator, a second pressure reducer, an exterior heat exchanger, an intermediate pressure refrigerant passage, a switching device, and a controller. The controller operates the switching device to switch from a refrigerant circuit of a two-stage compression mode to a refrigerant circuit of a single-stage compression mode when a compressor stop signal is output in the two-stage compression mode. The single-stage compression mode is a mode that blocks at least a flow of an intermediate-pressure refrigerant into the intermediate pressure refrigerant passage and makes refrigerant remained in the intermediate pressure refrigerant passage to flow out of the intermediate pressure refrigerant passage. The controller stops the compressor after controls the compressor to continue operating for a specified time in the single-stage compression mode.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: March 5, 2019
    Assignee: DENSO CORPORATION
    Inventors: Teruaki Ohyama, Koji Sakai, Yuji Kamiya, Tomoyuki Sumi, Shinji Nakamoto
  • Patent number: 10188117
    Abstract: To provide a noodle string treatment apparatus and treatment method capable of manufacturing instant noodles that are short noodle strings. The noodle string treatment apparatus of the present invention has: a cutting device having a rotary blade and cutting a batch of noodle strings into a predetermined length; and a control device for controlling a blade edge peripheral speed of the rotary blade, wherein the control device changes the blade edge peripheral speed of the rotary blade during rotation thereof.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: January 29, 2019
    Assignee: NISSIN FOODS HOLDINGS CO., LTD.
    Inventors: Kenji Okazawa, Koji Sakai, Kazuhiro Nakatani, Hiroko Imaki
  • Patent number: 10183555
    Abstract: An onboard electric system includes a drive circuit that drives an electric motor based on an output voltage of a direct current power supply; a first smoothing capacitor; a drive signal generator; a first discharge resistor that is connected between a positive electrode and a negative electrode of the first smoothing capacitor; a first discharge switcher that is connected in series to the first discharge resistor between the positive electrode and the negative electrode, and releases or makes a connection between the positive electrode and the negative electrode; and an off-signal generator that outputs an off signal to the first discharge switcher. The first discharge switcher is provided by a switcher of a normally-ON type that makes the connection between the positive electrode and the negative electrode through the first discharge resistor in a period other than a period while the off-signal generator provides the off signal.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: January 22, 2019
    Assignee: DENSO CORPORATION
    Inventors: Koji Sakai, Tomoyuki Sumi
  • Patent number: 10164558
    Abstract: An electric motor control device includes a control unit that controls operation of a drive circuit supplying electric power to an electric motor and a current sensor that detects current generated in the electric motor. The control unit detects fundamental high frequency current generated when the electric motor is applied with fundamental high frequency voltage for estimating the magnetic pole position, selects first electric angle and second electric angle corresponding to a d-axis direction of the magnetic pole position, detects first specific high frequency current generated when a position of the first electric angle is applied with specific high frequency voltage and second specific high frequency current generated when a position of the second electric angle is applied with the specific high frequency voltage, and compares the first and the second specific high frequency currents to estimate a positive d-axis direction of the magnetic pole position.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: December 25, 2018
    Assignee: DENSO CORPORATION
    Inventor: Koji Sakai
  • Patent number: 10158318
    Abstract: In a control device controlling a drive circuit that drives an in-vehicle electric motor based on an output voltage of a DC power source, a capacitor for stabilizing the output voltage is disposed between the DC power source and the drive circuit, and a relay switch is disposed between the DC power source and the capacitor. The control device includes: an anomaly determining device that determines whether an anomaly occurs in a vehicle; and a discharge control device that controls the drive circuit to generate a torque at the electric motor based on an output voltage of the capacitor in a state where the relay switch disconnects between the DC power source and the capacitor when the anomaly determining device determines that the anomaly occurs in the vehicle.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: December 18, 2018
    Assignee: DENSO CORPORATION
    Inventors: Shinji Nakamoto, Koji Sakai
  • Patent number: 10131858
    Abstract: The present invention is provided with a step for preheating coal, a step for heating an extraction solvent, a step for mixing the preheated coal and the extraction solvent heated to a higher temperature than the preheated coal and thereby heating the coal, a step for separating a solution in which a coal component is dissolved from the mixture of the coal and the extraction solvent, and a step for evaporating and separating the extraction solvent from the solution.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: November 20, 2018
    Assignee: Kobe Steel, Ltd.
    Inventors: Koji Sakai, Noriyuki Okuyama, Takuya Yoshida, Shigeru Kinoshita
  • Patent number: 10131352
    Abstract: A CPU drives an inverter based on a command rotation speed that is inputted from a higher level ECU at a predetermined update interval. The CPU acquires an actual rotation speed of the electric motor, and calculates an accelerated rate and a decelerated rate based on the update interval and a difference between the actual rotation speed and the command rotation speed such that the actual rotation speed changes without reaching the command rotation speed and becoming constant before an end of the update interval. The CPU drives the inverter such that the electric motor rotates at the calculated rate.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: November 20, 2018
    Assignee: DENSO CORPORATION
    Inventors: Tomoyuki Sumi, Koji Sakai, Yuuji Kamiya, Hideyuki Morita
  • Patent number: D841647
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: February 26, 2019
    Assignee: OLYMPUS CORPORATION
    Inventor: Koji Sakai
  • Patent number: D849117
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: May 21, 2019
    Assignee: OLYMPUS CORPORATION
    Inventor: Koji Sakai
  • Patent number: D849118
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: May 21, 2019
    Assignee: OLYMPUS CORPORATION
    Inventor: Koji Sakai