Patents by Inventor Hiroyuki Ota

Hiroyuki Ota 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: 20220150042
    Abstract: A communication system includes a first processor that performs processing for transmitting a signal to and receiving a signal from a communication destination device and a second processor that performs processing of an additional function. The second processor includes a decoding unit that decodes a transmission signal encoded by the first processor or a reception signal encoded by the communication destination device, an information acquiring unit that acquires information from the transmission signal or the reception signal decoded by the decoding unit, an additional function executing unit that performs the processing of the additional function using the information acquired by the information acquiring unit, and an encoding unit that performs processing for encoding the decoded transmission signal and outputting a resulting signal to the communication destination device or processing for encoding the decoded reception signal and outputting a resulting signal to the first processor.
    Type: Application
    Filed: March 2, 2020
    Publication date: May 12, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takahiro SUZUKI, Noriyuki OTA, Hiroyuki UZAWA, Hirotaka UJIKAWA
  • Patent number: 11228271
    Abstract: Provides are a control device for a three-phase synchronous motor in which a position detection accuracy of a rotor can be improved when one three-phase synchronous motor is driven by a plurality of inverters, and an electric power steering device using the same. A control device for a three-phase synchronous motor includes: a three-phase synchronous motor including a first three-phase winding and a second three-phase winding; a first inverter connected to the first three-phase winding; a second inverter connected to the second three-phase winding; a first control device that controls the first inverter on the basis of a rotor position of the three-phase synchronous motor; and a second control device that controls the second inverter on the basis of the rotor position of the three-phase synchronous motor. The first control device estimates the rotor position on a basis of a neutral point potential of the first three-phase winding and a neutral point potential of the second three-phase winding.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: January 18, 2022
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Takafumi Hara, Shigehisa Aoyagi, Toshiyuki Ajima, Hiroyuki Ota, Yoshitaka Sugiyama
  • Patent number: 11114565
    Abstract: Power consumption of a semiconductor device is reduced by sharpening the rise of a drain current when a gate voltage of a field effect transistor is less than a threshold voltage. As means therefor, in a fully-depleted MOSFET in which a thickness of a semiconductor layer serving as a channel region is 20 nm or less, a gate plug connected to a gate electrode is constituted of a first plug, a ferroelectric film, and a second plug sequentially stacked on the gate electrode. Here, an area where a contact surface between the first plug and the ferroelectric film and a contact surface between the ferroelectric film and the second plug overlap in a plan view is smaller than an area where the gate electrode and a semiconductor layer serving as an active region overlap.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: September 7, 2021
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Hiroyuki Ota, Shinji Migita
  • Publication number: 20210250688
    Abstract: The disclosure of the present specification aims to provide a directivity control system for speakers, which is capable of easily controlling directivity of acoustic data to provide desired sound fields with a plurality of speakers, and freely producing sound fields with high accuracy. A plurality of physically connected speaker units are virtually arrayed at respective directivity angles according to control signals that define the directivity angles. Virtual delay time data is calculated for the case where data is outputted with the virtual array, and output is performed according to output data affected by the delay time data, so that desired sound fields can be formed with the speaker units remaining fixed, without the necessity of mechanically rotating the speaker units.
    Type: Application
    Filed: June 12, 2019
    Publication date: August 12, 2021
    Applicant: DREAM INCORPORATED
    Inventors: Masanobu NORIYUKI, Hiroyuki OTA, Akira MASU
  • Patent number: 11089403
    Abstract: The disclosure of the present specification aims to provide a directivity control system for speakers, which is capable of easily controlling directivity of acoustic data to provide desired sound fields with a plurality of speakers, and freely producing sound fields with high accuracy. A plurality of physically connected speaker units are virtually arrayed at respective directivity angles according to control signals that define the directivity angles. Virtual delay time data is calculated for the case where data is outputted with the virtual array, and output is performed according to output data affected by the delay time data, so that desired sound fields can be formed with the speaker units remaining fixed, without the necessity of mechanically rotating the speaker units.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: August 10, 2021
    Assignee: Dream Incorporated
    Inventors: Masanobu Noriyuki, Hiroyuki Ota, Akira Masu
  • Publication number: 20210091700
    Abstract: Provides are a control device for a three-phase synchronous motor in which a position detection accuracy of a rotor can be improved when one three-phase synchronous motor is driven by a plurality of inverters, and an electric power steering device using the same. A control device for a three-phase synchronous motor includes: a three-phase synchronous motor including a first three-phase winding and a second three-phase winding; a first inverter connected to the first three-phase winding; a second inverter connected to the second three-phase winding; a first control device that controls the first inverter on the basis of a rotor position of the three-phase synchronous motor; and a second control device that controls the second inverter on the basis of the rotor position of the three-phase synchronous motor. The first control device estimates the rotor position on a basis of a neutral point potential of the first three-phase winding and a neutral point potential of the second three-phase winding.
    Type: Application
    Filed: July 13, 2018
    Publication date: March 25, 2021
    Inventors: Takafumi HARA, Shigehisa AOYAGI, Toshiyuki AJIMA, Hiroyuki OTA, Yoshitaka SUGIYAMA
  • Publication number: 20200243687
    Abstract: Power consumption of a semiconductor device is reduced by sharpening the rise of a drain current when a gate voltage of a field effect transistor is less than a threshold voltage. As means therefor, in a fully-depleted MOSFET in which a thickness of a semiconductor layer serving as a channel region is 20 nm or less, a gate plug connected to a gate electrode is constituted of a first plug, a ferroelectric film, and a second plug sequentially stacked on the gate electrode. Here, an area where a contact surface between the first plug and the ferroelectric film and a contact surface between the ferroelectric film and the second plug overlap in a plan view is smaller than an area where the gate electrode and a semiconductor layer serving as an active region overlap.
    Type: Application
    Filed: September 11, 2018
    Publication date: July 30, 2020
    Inventors: Hiroyuki Ota, Shinji Migita
  • Publication number: 20200244203
    Abstract: Disclosed are a motor control device that can accurately estimate a rotor position based on a neutral point potential even when a load increases, and a brake control device that is driven by the motor control device. The motor control device 3 includes a three-phase synchronous motor 4 including a three-phase winding, an inverter 31 connected to the three-phase winding, a control unit 6 for controlling the inverter based on a rotor position of the three-phase synchronous motor, and a rotational position estimation unit 2 for estimating a rotor position ?d based on a neutral point potential Vn of the three-phase winding. The rotational position estimation unit estimates a rotor position selectively using one or more of a plurality of detected values of the neutral point potential according to a pre-estimated value of the rotor position and a voltage application state to the three-phase winding.
    Type: Application
    Filed: October 10, 2018
    Publication date: July 30, 2020
    Inventors: Takafumi HARA, Toshiyuki AJIMA, Shigehisa AOYAGI, Hiroyuki OTA, Kenichiro MATSUBARA
  • Patent number: 10636751
    Abstract: A semiconductor device 100 of the present invention includes a front end and back ends A and B, each including a plurality of layers. Further, in the plurality of layers of the back end B, (i) circuits 22, 23, and 24 having a security function are provided in at least one layer having a wiring pitch of 100 nm or more, (ii) a circuit having a security function is provided in at least one wiring layer in M5 or higher level (M5, M6, M7, . . . ), (iii) a circuit having a security function is provided in at least one layer, for which immersion ArF exposure does not need to be used, or (iv) a circuit having a security function is provided in at least one layer that is exposed by using an exposure wavelength of 200 nm or more.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: April 28, 2020
    Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Yohei Hori, Yongxun Liu, Shinichi Ouchi, Tetsuji Yasuda, Meishoku Masahara, Toshifumi Irisawa, Kazuhiko Endo, Hiroyuki Ota, Tatsuro Maeda, Hanpei Koike, Yasuhiro Ogasahara, Toshihiro Katashita, Koichi Fukuda
  • Publication number: 20200032801
    Abstract: In a method for operation control of a compressor, full-load running in which a gas intake control valve is fully open and a target rotation speed of a drive source is set to a full-load rotation speed that is a maximum rotation speed in a speed control band when pressure of compressed gas supplied to the consumption side is a datum pressure or less is carried out; then no-load running in which the valve is fully closed and a no-load rotation speed is set as the target rotation speed of the drive source when the supply pressure is a no-load running pressure or less that is a pressure higher than the datum pressure is carried out. The no-load running is started from the standard no-load rotation speed, however, after a transition time, the target rotation speed is reduced to a low speed no-load rotation speed.
    Type: Application
    Filed: June 12, 2019
    Publication date: January 30, 2020
    Inventors: Takahiro OGUMA, Hiroyuki OTA
  • Patent number: 10318745
    Abstract: To provide a system for simplifying setting of access control for a file system and a firewall, it is provided an access control system, which is formed by a computer including a processor configured to execute a process, and a memory configured to store a program for executing the process, the access control system comprising: a launcher, which is a process configured to activate the process; an ACL file in which specifics for controlling an I/O request issued by the process are defined; a process search module configured to trace a parent of the process to determine whether or not the process is an activated process that has originated from the launcher; and an access control module configured to control an I/O request issued by the activated process that has originated from the launcher in accordance with the specifics defined in the ACL file.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: June 11, 2019
    Assignee: Hitachi Solutions, Ltd.
    Inventors: Yuuichi Kiyokawa, Kouji Inoue, Ryuuji Nakayama, Hiroyuki Ota
  • Publication number: 20190019766
    Abstract: A semiconductor device 100 of the present invention includes a front end and back ends A and B, each including a plurality of layers. Further, in the plurality of layers of the back end B, (i) circuits 22, 23, and 24 having a security function are provided in at least one layer having a wiring pitch of 100 nm or more, (ii) a circuit having a security function is provided in at least one wiring layer in M5 or higher level (M5, M6, M7, . . . ), (iii) a circuit having a security function is provided in at least one layer, for which immersion ArF exposure does not need to be used, or (iv) a circuit having a security function is provided in at least one layer that is exposed by using an exposure wavelength of 200 nm or more.
    Type: Application
    Filed: August 3, 2016
    Publication date: January 17, 2019
    Inventors: Yohei Hori, Yongxun Liu, Shinichi Ouchi, Tetsuji Yasuda, Meishoku Masahara, Toshifumi Irisawa, Kazuhiko Endo, Hiroyuki Ota, Tatsuro Maeda, Hanpei Koike, Yasuhiro Ogasahara, Toshihiro Katashita, Koichi Fukuda
  • Publication number: 20180246667
    Abstract: A file system includes a calculator and a module. The calculator includes a storage unit and an auxiliary storage device. The storage unit temporarily stores data. The auxiliary storage device includes a disk that permanently stores the data. The module is configured to execute a compression process on I/O-requested data using a compression algorithm. The module is configured to separate and store the compressed data in the storage unit and the auxiliary storage device.
    Type: Application
    Filed: October 11, 2016
    Publication date: August 30, 2018
    Inventors: Hiroyuki OTA, Yuuichi KIYOKAWA, Hiroshi KURATA, Naoyuki YOKOI
  • Publication number: 20180225465
    Abstract: To provide a system for simplifying setting of access control for a file system and a firewall, it is provided an access control system, which is formed by a computer including a processor configured to execute a process, and a memory configured to store a program for executing the process, the access control system comprising: a launcher, which is a process configured to activate the process; an ACL file in which specifics for controlling an I/O request issued by the process are defined; a process search module configured to trace a parent of the process to determine whether or not the process is an activated process that has originated from the launcher; and an access control module configured to control an I/O request issued by the activated process that has originated from the launcher in accordance with the specifics defined in the ACL file.
    Type: Application
    Filed: January 6, 2016
    Publication date: August 9, 2018
    Inventors: Yuuichi KIYOKAWA, Kouji INOUE, Ryuuji NAKAYAMA, Hiroyuki OTA
  • Patent number: 9906174
    Abstract: Provided are a power steering device and a control device for a power steering device, which are capable of reducing power consumption. The power steering device includes a current detection number setting circuit configured to set the number of times of detection of a DC bus current value by a current detecting circuit to a first predetermined number over a first predetermined cycle of a PWM period when the steering-state signal indicative of a steering operation state is received, and to set the number of times of detection so that the number of times of detection becomes smaller than the first predetermined number over the first predetermined cycle of the PWM period when a steering-state signal indicative of a non-steered state is received.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: February 27, 2018
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yoshitaka Sugiyama, Masaki Kashima, Hiroyuki Ota
  • Patent number: 9835508
    Abstract: An object of the present invention is to realize a pressure sensor with a small variation in sensor characteristics. The pressure sensor includes a diaphragm having longitudinal and lateral sides, and four strain gauges disposed on the diaphragm. The four strain gauges are arranged at a center of the diaphragm. Two of the four strain gauges are arranged along a lateral direction, and other two strain gauges are arranged along a longitudinal direction.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: December 5, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Atsushi Kazama, Hiroyuki Ota, Jiro Hashizume, Junji Onozuka, Hiroshi Onuki, Miho Tobita
  • Publication number: 20170221514
    Abstract: In a tape recording medium, a sliding layer has an electric resistance of 1×108 ?/sq or less, and contains carbon particles and solid particles. The carbon particles have a primary particle size of 30 nm or less and a BET specific surface area of 100 m2/g or more. The solid particles have a primary particle size of 100 nm or less, a Mohs' hardness in a range from 2.5 to 8, inclusive, a density of 3 g/cm3 or more, and a BET specific surface area of 30 m2/g or more.
    Type: Application
    Filed: October 13, 2016
    Publication date: August 3, 2017
    Inventors: KENYA HORI, TAKESHI MORITA, HIROYUKI OTA, TATSUMASA YAMADA
  • Patent number: 9698235
    Abstract: The present invention provides a field-effect transistor having an accumulation-layer-operation type field-effect transistor that includes a semiconductor layer in which a source region, a channel region, and a drain region that have either an N-type or P-type conductivity in common are formed, and a gate electrode disposed adjacent to the channel region via a gate insulating film, wherein the gate insulating film is made of a dielectric having a change gradient of a relative dielectric constant in which the relative dielectric constant changes to decrease according to the magnitude of a gate voltage applied to the gate electrode.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: July 4, 2017
    Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Shinji Migita, Hiroyuki Ota, Koichi Fukuda
  • Publication number: 20170025973
    Abstract: Provided are a power steering device and a control device for a power steering device, which are capable of reducing power consumption. The power steering device includes a current detection number setting circuit configured to set the number of times of detection of a DC bus current value by a current detecting circuit to a first predetermined number over a first predetermined cycle of a PWM period when the steering-state signal indicative of a steering operation state is received, and to set the number of times of detection so that the number of times of detection becomes smaller than the first predetermined number over the first predetermined cycle of the PWM period when a steering-state signal indicative of a non-steered state is received.
    Type: Application
    Filed: March 5, 2015
    Publication date: January 26, 2017
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yoshitaka SUGIYAMA, Masaki KASHIMA, Hiroyuki OTA
  • Patent number: D933820
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: October 19, 2021
    Assignee: OLYMPUS CORPORATION
    Inventor: Hiroyuki Ota