Patents by Inventor Hiroki Okamura

Hiroki Okamura 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: 20240089775
    Abstract: A terminal including: a reception unit that receives a reference signal periodically transmitted from a network; a transmission unit that transmits a measurement result of the reference signal; and a control unit that determines whether or not to assume a reception of at least a part of the reference signal based on whether or not a specific condition is satisfied.
    Type: Application
    Filed: January 26, 2021
    Publication date: March 14, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daisuke Kurita, Mayuko Okano, Satoshi Nagata, Masaya Okamura, Tomoya Ohara
  • Publication number: 20240089762
    Abstract: A terminal comprises: a reception unit that receives a reference signal used for a purpose other than a measurement related to a radio link management; and a control unit that performs the measurement related to the radio link management using the reference signal.
    Type: Application
    Filed: January 26, 2021
    Publication date: March 14, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daisuke Kurita, Mayuko Okano, Satoshi Nagata, Masaya Okamura, Tomoya Ohara
  • Publication number: 20240090012
    Abstract: A terminal comprises: a reception unit that receives a reference signal used for a purpose other than a measurement related to a radio resource management; and a control unit that performs the measurement related to the radio resource management using the reference signal.
    Type: Application
    Filed: January 26, 2021
    Publication date: March 14, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daisuke Kurita, Mayuko Okano, Satoshi Nagata, Masaya Okamura, Tomoya Ohara
  • Publication number: 20240089764
    Abstract: A terminal comprises: a transmission unit that transmits a reference signal used for a purpose other than a measurement related to a reception quality in a physical layer; and a control unit that assumes the measurement related to the reception quality in the physical layer is performed using the reference signal.
    Type: Application
    Filed: January 26, 2021
    Publication date: March 14, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daisuke Kurita, Mayuko Okano, Satoshi Nagata, Masaya Okamura, Tomoya Ohara
  • Patent number: 10098583
    Abstract: In a sleep quality estimation device, a respiration sensor detects the respiratory waveform of a subject. A sleep stage estimation unit estimates the sleep stage of the subject during sleep based on the respiratory waveform detected by the respiration sensor. In a sleep rhythm model database, models associated with the appearance probability of ?-wave for the sleep stage during sleep are recorded. A sleep quality estimation unit estimates the appearance time of ?-wave of the subject during sleep based on the sleep stage of the subject estimated by the sleep stage estimation unit and the models associated with the appearance probability of ?-wave for the sleep stage recorded in the sleep rhythm model database, and estimates the sleep quality of the subject based on the appearance time of ?-wave.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: October 16, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuhide Shigeto, Hiroki Okamura, Hirokazu Kikuchi
  • Patent number: 9841065
    Abstract: A wet friction disk that can achieve a further reduction in the drag torque, which includes a ring-shaped core plate having a wave shape in a circumferential direction thereof, a friction member disposed on a principal surface of the core plate so as to being substantially shaped into a ring with a plurality of oil grooves, and the oil grooves each have a shape with a groove width that is narrowed from an inner circumference side toward an outer circumference side of the core plate.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: December 12, 2017
    Assignee: AISIN KAKO KABUSHIKI KAISHA
    Inventor: Hiroki Okamura
  • Patent number: 9291211
    Abstract: In a wet friction material, a plurality of segment pieces is disposed at both sides of inter-segment grooves. The segment pieces are composed of first segment pieces and second segment pieces. The first segment piece has at least two inner peripheral recesses formed on an inner periphery thereof and at least two outer peripheral recesses formed on an outer periphery thereof. The outer periphery of the first segment piece has a short dimension. The second segment piece has at least two inner peripheral recesses formed on an inner periphery thereof and at least two outer peripheral recesses formed on an outer periphery thereof. The outer periphery of the second segment piece has a long dimension.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: March 22, 2016
    Assignee: AISIN KAKO KABUSHIKI KAISHA
    Inventor: Hiroki Okamura
  • Publication number: 20150275985
    Abstract: A wet friction disk that can achieve a further reduction in the drag torque, which includes a ring-shaped core plate having a wave shape in a circumferential direction thereof, a friction member disposed on a principal surface of the core plate so as to being substantially shaped into a ring with a plurality of oil grooves, and the oil grooves each have a shape with a groove width that is narrowed from an inner circumference side toward an outer circumference side of the core plate.
    Type: Application
    Filed: March 23, 2015
    Publication date: October 1, 2015
    Applicant: AISIN KAKO KABUSHIKI KAISHA
    Inventor: Hiroki OKAMURA
  • Publication number: 20150038865
    Abstract: In a sleep quality estimation device, a respiration sensor detects the respiratory waveform of a subject. A sleep stage estimation unit estimates the sleep stage of the subject during sleep based on the respiratory waveform detected by the respiration sensor. In a sleep rhythm model database, models associated with the appearance probability of ?-wave for the sleep stage during sleep are recorded. A sleep quality estimation unit estimates the appearance time of ?-wave of the subject during sleep based on the sleep stage of the subject estimated by the sleep stage estimation unit and the models associated with the appearance probability of ?-wave for the sleep stage recorded in the sleep rhythm model database, and estimates the sleep quality of the subject based on the appearance time of ?-wave.
    Type: Application
    Filed: February 24, 2012
    Publication date: February 5, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuhide Shigeto, Hiroki Okamura, Hirokazu Kikuchi
  • Publication number: 20140346003
    Abstract: In a wet friction material, a plurality of segment pieces is disposed at both sides of inter-segment grooves. The segment pieces are composed of first segment pieces and second segment pieces. The first segment piece has at least two inner peripheral recesses formed on an inner periphery thereof and at least two outer peripheral recesses formed on an outer periphery thereof. The outer periphery of the first segment piece has a short dimension. The second segment piece has at least two inner peripheral recesses formed on an inner periphery thereof and at least two outer peripheral recesses formed on an outer periphery thereof. The outer periphery of the second segment piece has a long dimension.
    Type: Application
    Filed: May 19, 2014
    Publication date: November 27, 2014
    Applicant: AISIN KAKO KABUSHIKI KAISHA
    Inventor: Hiroki OKAMURA
  • Publication number: 20140236386
    Abstract: A driving assistance apparatus includes a plurality of model candidates that define a correspondence relationship between a driving operation performed by a driver and information indicating relative positions of a moving body detected on a periphery of a host vehicle and the host vehicle. The driving assistance apparatus determines a model to be used from among the plurality of model candidates on the basis of information relating to the detected moving body, and executes driving assistance on the basis of the determined model and a driving operation performed by the driver following detection of the moving body. Preferably, the determined model can be updated on the basis of the determined model and the driving operation performed by the driver following detection of the moving body.
    Type: Application
    Filed: September 22, 2011
    Publication date: August 21, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shintaro Yoshizawa, Hirokazu Kikuchi, Hiroki Okamura, Takuya Yamanashi, Quy Hung Nguyen Van
  • Patent number: 8647253
    Abstract: A drowsiness level detection section detects a drowsiness level of an individual person. A sleep depth level control section controls the sleep depth of the individual person based on the detected drowsiness level. The sleep depth level control section executes a first sleep control, in which the sleep depth level of the individual person is maintained at a predetermined sleep depth level below a maximum sleep depth level, if the detected drowsiness level is equal to or below a predetermined threshold.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: February 11, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hisashi Iizuka, Hiroki Okamura
  • Patent number: 8576081
    Abstract: Provided are a physiological condition estimation device and a vehicle control device capable of preventing an error in the operation of an apparatus, such as a vehicle, and improving the safety of the operation of the apparatus. The physiological condition estimation device includes an eye-open time acquiring unit that acquires the eye-open time of the driver, a variation calculating unit that acquires a variation in the eye-open time acquired by the eye-open time acquiring unit, and a drowsiness predicting unit that determines the physiological condition of the driver on the basis of the variation in the eye-open time acquired by the variation calculating unit. In this way, since the physiological condition is determined on the basis of the variation in the eye-open time, it is possible to detect a slight reduction in the arousal level and estimate a significant reduction in the arousal level to a value that will cause an error in the driving of the vehicle in the future.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: November 5, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshiyuki Hatakeyama, Yutaka Hirano, Hiroki Okamura
  • Patent number: 8157075
    Abstract: Provided is a wet friction material that includes a ring shaped flat metal core and a plurality of segment-type friction material substrates joined onto one or both of surfaces of the ring shaped flat metal core with an adhesive and spaced apart along an entire circumference of the ring shaped flat metal core to form a plurality of oil grooves extending in a radial direction of the core metal by a clearance between adjacent ones of the above segment pieces. One or both of outer peripheral corner portions of each of the plurality of segment-type friction material substrates is chamfered to form a chamfered part such that a width of the oil grooves adjacent the chamfered part of the corner portions is larger than a width of a thinnest portion of the above plurality of the oil grooves.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: April 17, 2012
    Assignee: Aisin Kako Kabushiki Kaisha
    Inventors: Hiroki Okamura, Yoshihito Fujimaki
  • Publication number: 20110313259
    Abstract: Provided are a physiological condition estimation device and a vehicle control device capable of preventing an error in the operation of an apparatus, such as a vehicle, and improving the safety of the operation of the apparatus. The physiological condition estimation device includes an eye-open time acquiring unit that acquires the eye-open time of the driver, a variation calculating unit that acquires a variation in the eye-open time acquired by the eye-open time acquiring unit, and a drowsiness predicting unit that determines the physiological condition of the driver on the basis of the variation in the eye-open time acquired by the variation calculating unit. In this way, since the physiological condition is determined on the basis of the variation in the eye-open time, it is possible to detect a slight reduction in the arousal level and estimate a significant reduction in the arousal level to a value that will cause an error in the driving of the vehicle in the future.
    Type: Application
    Filed: January 20, 2010
    Publication date: December 22, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshiyuki Hatakeyama, Yutaka Hirano, Hiroki Okamura
  • Patent number: 7919165
    Abstract: In a wet-type friction material, a ring-shaped friction material substrate is compressed and fixed on a surface of a core metal by heat-pressing by a manufacturing metal mold. At the same time, a taper of an angle ? corresponding to a taper at an outer peripheral side of an upper mold is provided on an outer peripheral side of the ring-shaped friction material substrate. Thus, the taper is formed such that a thickness in a radial direction of the ring-shaped friction material substrate becomes smaller from a middle point toward an outer peripheral edge.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: April 5, 2011
    Assignee: Aisin Kako Kabushiki Kaisha
    Inventors: Masato Hasegawa, Hiroki Okamura
  • Publication number: 20110021866
    Abstract: A drowsiness level detection section detects a drowsiness level of an individual person. A sleep depth level control section controls the sleep depth of the individual person based on the detected drowsiness level. The sleep depth level control section executes a first sleep control, in which the sleep depth level of the individual person is maintained at a predetermined sleep depth level below a maximum sleep depth level, if the detected drowsiness level is equal to or below a predetermined threshold.
    Type: Application
    Filed: March 6, 2009
    Publication date: January 27, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hisashi Iizuka, Hiroki Okamura
  • Publication number: 20090050434
    Abstract: In a wet friction material, to be able to obtain a more significant drag torque reduction effect certainly even in case of a specification that there is no lubricating oil supply from an inner peripheral side or in case that a stirred torque increases by generating oil retained at an outer periphery. In case of the specification (without axis core lubrication) that there is no lubricating oil (ATF) supply from the inner peripheral side of the wet friction material, that is, in case that there is the lubricating oil supply only from the outer peripheral side, in segment-type friction materials 1, 1A and 1C, by making R processing or chamfering processing to one or both corner portions of the outer periphery of segment pieces 3, 3A, 3B and 3C, it can obtain a significant drag torque reduction effect by a peeling effect that ATF runs from the processing portion into front surfaces of the segment pieces 3, 3A, 3B and 3C and goes into between a counterpart material.
    Type: Application
    Filed: August 19, 2008
    Publication date: February 26, 2009
    Applicant: AISIN KAKO KABUSHIKI KAISHA
    Inventors: Hiroki OKAMURA, Yoshihito Fujimaki
  • Publication number: 20080199641
    Abstract: In a wet-type friction material, a ring-shaped friction material substrate is compressed and fixed on a surface of a core metal by heat-pressing by a manufacturing metal mold. At the same time, a taper of an angle ? corresponding to a taper at an outer peripheral side of an upper mold is provided on an outer peripheral side of the ring-shaped friction material substrate. Thus, the taper is formed such that a thickness in a radial direction of the ring-shaped friction material substrate becomes smaller from a middle point toward an outer peripheral edge.
    Type: Application
    Filed: October 2, 2007
    Publication date: August 21, 2008
    Applicant: AISIN KAKO KABUSHIKI KAISHA
    Inventors: Masato Hasegawa, Hiroki Okamura
  • Patent number: 6776276
    Abstract: A wet friction material and its manufacturing method are provided. The wet friction material has a substrate having a surface and a very superficial layer. The very superficial layer is provided on the surface of the substrate and contains resin and fibers. The resin and the fibers are heated by one of a laser beam, a heating plate and a heating roller so as to thermally change the very superficial layer in a short period of time. Such manufacturing method is capable of evenly carbonizing the resin and the fibers of the very superficial layer of a friction surface of the wet friction material so as to flexibly deal with a variety of size of products.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: August 17, 2004
    Assignee: Aisin Kako Kabushiki Kaisha
    Inventors: Hiroki Okamura, Masato Suzuki, Yoshihito Fujimaki