Patents by Inventor Daisuke Takai

Daisuke Takai 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: 20250070896
    Abstract: A ranging device extracts N signal pairs corresponding to N (N>=2) signal strengths excluding one or more signal strengths less than a threshold value among signal strengths of the signal pairs of the first signals and the second signals from the plurality of signal pairs, obtains a reciprocating phase obtained by summing the first phases and the second phases of the first signals and the second signals included in each signal pair for the N signal pairs, and measures a distance to the other device based on the N reciprocating phases and the plurality of frequencies.
    Type: Application
    Filed: November 7, 2024
    Publication date: February 27, 2025
    Inventors: Yusuke TERADO, Daisuke TAKAI
  • Patent number: 12210085
    Abstract: An angle measuring device includes an antenna device having antenna elements equally spaced along a first axis and a second axis, respectively, a selecting unit that selects phase differences with which a variance thereof becomes a predetermined value or less, from a plurality of phase differences of signals received from a transmission device by the antenna elements, an azimuth angle computing unit that computes an azimuth angle of the transmission device from a ratio of a first phase difference between signals received by two antenna elements spaced by a predetermined distance along the first axis and a second phase difference between signals received by two antenna elements space by the predetermined distance along the second axis, and an elevation angle computing unit that computes an elevation angle of the transmission device, based on the computed azimuth angle and the first or second phase difference.
    Type: Grant
    Filed: August 9, 2022
    Date of Patent: January 28, 2025
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Taiki Igarashi, Mitsunobu Inoue, Naoya Shimada, Daisuke Takai
  • Publication number: 20240345688
    Abstract: An electrostatic input device includes a capacitance detector that is disposed at an operation part to be operated by a living body, and is configured to detect capacitance; and a controller that is formed of an integrated circuit, and is configured to transition the capacitance detector to an activated state in response to an increment in the capacitance detected by the capacitance detector reaching or exceeding a first predetermined value a predetermined number of times or more within a predetermined period in a case in which the capacitance detector is in a standby state and no contact with the living body is detected.
    Type: Application
    Filed: June 27, 2024
    Publication date: October 17, 2024
    Inventors: Kazuhito OSHITA, Daisuke TAKAI, Toshiki NAKAMURA
  • Publication number: 20240314714
    Abstract: A positioning device for determining a position of a mobile communication device includes a processor that corrects a clock of at least one of a first wireless communication device or a second wireless communication device that is disposed at a first distance from the first wireless communication device, based on a difference between the first distance and a second distance between the first wireless communication device and the second wireless communication device. The second distance is determined based on a first phase of a first signal transmitted at a first frequency from the first wireless communication device and is received by the second wireless communication device, a second phase of a second signal that is transmitted at a second frequency from the first wireless communication device and is received by the second wireless communication device, and the first distance.
    Type: Application
    Filed: May 29, 2024
    Publication date: September 19, 2024
    Inventors: Yukimitsu YAMADA, Daisuke TAKAI
  • Publication number: 20240272291
    Abstract: A wireless device includes a transmitter; a receiver; and a control device configured to obtain a first difference of a predetermined physical quantity, in a unit time, of a predetermined-frequency signal transmitted by the transmitter to another device, and calculate a second difference of the predetermined physical quantity, in the unit time, of the predetermined-frequency signal received by the another device, based on a signal received by the receiver; and perform a determination process of comparing the first difference and the second difference to determine legitimacy of the signal received by the receiver.
    Type: Application
    Filed: April 26, 2024
    Publication date: August 15, 2024
    Inventors: Yuki FUTAGI, Yukimitsu YAMADA, Daisuke TAKAI, Hongyuan CHEN, Takeo SATO, Akihiro ABE
  • Publication number: 20240230818
    Abstract: A positioning system includes an elevation angle calculator that determines, as a second elevation angle, an inverse cosine of a first value, upon occurrence of a condition in which an absolute value of a first elevation angle is greater than or equal to a second predetermined angle, the second predetermined angle being greater than a first predetermined angle, the first value being obtained by dividing a second value that is obtained by correcting, with a correction value, an altitude measured by an altitude measurement unit, by a distance measured by a distance measurement unit. The elevation angle calculator selects any one of the first elevation angle and the second elevation angle, based on a value of the first elevation angle.
    Type: Application
    Filed: October 11, 2023
    Publication date: July 11, 2024
    Inventors: Taiki IGARASHI, Daisuke TAKAI
  • Publication number: 20240203185
    Abstract: A positioning system includes: a transmitting and receiving part having multiple antennas and positioned overhead in a positioning target area with a side entrance; a distance calculation part configured to calculate a distance between a communication device that can move in the positioning target area, and the transmitting and receiving part, based on results gained from signals of multiple frequencies transmitted bidirectionally between the communication device and the transmitting and receiving part; an angle calculation part configured to calculate an angle that indicates a position of the communication device with respect to the transmitting and receiving part, based on a phase difference between the signals received by the antennas of the transmitting and receiving part; and a determining part configured to determine whether or not the communication device is approaching the side entrance based on the distance and angle calculated by the distance calculation part and the angle calculation part.
    Type: Application
    Filed: December 15, 2023
    Publication date: June 20, 2024
    Inventors: Taiki IGARASHI, Daisuke TAKAI
  • Patent number: 12003357
    Abstract: In order to provide a receiver capable of accurately determining a phase difference of I/Q signals, a receiver includes a section detector configured to detect a section between a rising and a falling of a phase based on the rising and the falling of the phase represented by I/Q signals generated based on an advertisement packet transmitted from a transmitter, and a section setting unit configured to identify, within the section between the rising and the falling of the phase, a period in which a first variation amount of the phase is equal to or less than a first predetermined amount, and use the identified period as a section for detecting the phase of the I/Q signals. The section detector detects the rising when a first phase is smaller than a last phase among a plurality of phases acquired by sampling the phases.
    Type: Grant
    Filed: August 1, 2022
    Date of Patent: June 4, 2024
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Yukimitsu Yamada, Daisuke Takai, Mitsunobu Inoue
  • Publication number: 20240133990
    Abstract: A positioning system includes an elevation angle calculator that determines, as a second elevation angle, an inverse cosine of a first value, upon occurrence of a condition in which an absolute value of a first elevation angle is greater than or equal to a second predetermined angle, the second predetermined angle being greater than a first predetermined angle, the first value being obtained by dividing a second value that is obtained by correcting, with a correction value, an altitude measured by an altitude measurement unit, by a distance measured by a distance measurement unit. The elevation angle calculator selects any one of the first elevation angle and the second elevation angle, based on a value of the first elevation angle.
    Type: Application
    Filed: October 10, 2023
    Publication date: April 25, 2024
    Inventors: Taiki IGARASHI, Daisuke TAKAI
  • Patent number: 11946294
    Abstract: A door handle including a capacitance sensor configured to detect an operation body is provided. The capacitance sensor includes a substrate formed of an insulator and having a surface, at least one first sensor electrode disposed on the surface of the substrate, a plurality of second sensor electrodes disposed on the surface of the substrate, and a controller. The number of the plurality of second sensor electrodes is greater than the number of the at least one first sensor electrode. The controller applies a voltage to the plurality of second sensor electrodes and detects a coordinate position of the operation body, in a case where a capacitance between the operation body and the at least one first sensor electrode is greater than or equal to a predetermined value.
    Type: Grant
    Filed: February 3, 2021
    Date of Patent: April 2, 2024
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Kazuhito Oshita, Daisuke Takai
  • Patent number: 11926285
    Abstract: A remote communication system includes a portable device; and a fixed system. The fixed system includes main communication modules; and a position estimating unit configured to estimate a position of the portable device, based on an incident angle of a signal from the portable device, upon detecting the signal by antennas provided in the main communication modules. When there are two main communication modules for which the incident angle is known, the position of the portable device is estimated based on the incident angle. When there is one main communication module for which the incident angle is known, the position of the portable device is estimated based on the incident angle and a received radio wave intensity of the signal. When there is no main communication module for which the incident angle is known, the position of the portable device is estimated based on the received radio wave intensity.
    Type: Grant
    Filed: July 27, 2021
    Date of Patent: March 12, 2024
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Yoshihisa Kishimoto, Keigo Wakana, Daisuke Takai, Yukimitsu Yamada, Mitsuharu Nakasato, Kazuma Sato
  • Patent number: 11773629
    Abstract: An operation detection device includes an electrostatic sensor accommodated inside a casing and including a first conductor and a second conductor, and a controller electrically connected to the first conductor and the second conductor, and applies a voltage to each of the first conductor and the second conductor, to measure an electrostatic capacitance of each of the first conductor and the second conductor. The first conductor is arranged in and the second conductor is not arranged in a detection region in which an operating body is detected by the electrostatic sensor. The first conductor and the second conductor are arranged in a non-detection region in which the operating body is not detected.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: October 3, 2023
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Toshiki Nakamura, Daisuke Takai, Takashi Sasaki, Yuzuru Kawana, Yoshiyuki Kikuchi, Heishiro Fudo
  • Publication number: 20230072262
    Abstract: An angle measuring device includes an antenna device having antenna elements equally spaced along a first axis and a second axis, respectively, a selecting unit that selects phase differences with which a variance thereof becomes a predetermined value or less, from a plurality of phase differences of signals received from a transmission device by the antenna elements, an azimuth angle computing unit that computes an azimuth angle of the transmission device from a ratio of a first phase difference between signals received by two antenna elements spaced by a predetermined distance along the first axis and a second phase difference between signals received by two antenna elements space by the predetermined distance along the second axis, and an elevation angle computing unit that computes an elevation angle of the transmission device, based on the computed azimuth angle and the first or second phase difference.
    Type: Application
    Filed: August 9, 2022
    Publication date: March 9, 2023
    Inventors: Taiki IGARASHI, Mitsunobu INOUE, Naoya SHIMADA, Daisuke TAKAI
  • Patent number: 11511605
    Abstract: An operation input device includes a resistance element to generate a capacitance between an operating medium and the resistance element in response to an approach of the operating medium to the resistance element, and a power source to supply electric charge to one end and the other end of the resistance element. A first electric unit measures a first electric charge transfer amount supplied to the one end of the resistance element in response to generation of the capacitance. A second unit measures a second electric charge transfer amount supplied to the other end of the resistance element in response to generation of the capacitance. A controller is connected to the first and second units, and detects a position of the operating medium in a direction perpendicular to a surface of the resistance element based on a sum of the first and second electric charge transfer amounts.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: November 29, 2022
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Tatsumi Fujiyoshi, Hiroshi Shigetaka, Daisuke Takai
  • Publication number: 20220368580
    Abstract: In order to provide a receiver capable of accurately determining a phase difference of I/Q signals, a receiver includes a section detector configured to detect a section between a rising and a falling of a phase based on the rising and the falling of the phase represented by I/Q signals generated based on an advertisement packet transmitted from a transmitter, and a section setting unit configured to identify, within the section between the rising and the falling of the phase, a period in which a first variation amount of the phase is equal to or less than a first predetermined amount, and use the identified period as a section for detecting the phase of the I/Q signals. The section detector detects the rising when a first phase is smaller than a last phase among a plurality of phases acquired by sampling the phases.
    Type: Application
    Filed: August 1, 2022
    Publication date: November 17, 2022
    Inventors: Yukimitsu YAMADA, Daisuke TAKAI, Mitsunobu INOUE
  • Patent number: 11492823
    Abstract: A door handle includes door handle case, a first detection electrode and a second detection electrode disposed in the door handle case, and a controller connected to the first detection electrode and the second detection electrode. The controller separately measures a first capacitance between the first detection electrode and an operation body and a second capacitance between the second detection electrode and the operation body, and the controller determines whether a locking operation is performed by the operation body based on one or both of the first capacitance and the second capacitance.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: November 8, 2022
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Toshiki Nakamura, Takashi Sasaki, Yoshiyuki Kikuchi, Yuzuru Kawana, Yukimitsu Yamada, Daisuke Takai, Heishiro Fudo
  • Patent number: 11424086
    Abstract: An operation device includes a housing, an operation member, and a detector. The housing includes an electrically conductive portion on a surface thereof. The operation member is supported by the housing such that the operation member is movable in response to an operation by an operation body, and is configured to be capacitively coupled to the operation body and to the electrically conductive portion. The detector is configured to detect whether the operation body is in proximity to the operation member based on a change in capacitance at the electrically conductive portion.
    Type: Grant
    Filed: February 2, 2021
    Date of Patent: August 23, 2022
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Yasuji Hagiwara, Daisuke Takai, Takashi Sasaki, Takeshi Masaki, Toshiki Nakamura, Masaki Ota, Hiroshi Shigetaka, Masahiro Takata
  • Patent number: 11402281
    Abstract: A force sensor includes a substrate; a first electrode fixed to a first area on the substrate; a second electrode fixed to a second area different from the first area on the substrate, the second electrode extending to a position higher than the first electrode; a capacitance detecting unit configured to detect a capacitance corresponding to a distance between the first electrode and the second electrode; and an operation member including a contact area that is in contact with the second electrode. At least one of the first electrode and the second electrode is provided in plurality. The second electrode is elastically deformed by a load applied to the second electrode by an operation with respect to the operation member, and the distance between the second electrode and the first electrode changes according to an elastic deformation of the second electrode.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: August 2, 2022
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Kunio Sato, Daisuke Takai, Kazuhito Oshita, Hajime Shikata
  • Patent number: 11365571
    Abstract: An operation input device includes a substrate formed of an insulator, a plurality of detecting electrodes provided on a surface of the substrate, and a controller, wherein the controller detects capacitance generated between each of the detecting electrodes and an operation body when the operation body is positioned in proximity to the substrate, and determines that a gesture operation by the operation body is performed when a duration from when the capacitance becomes a first threshold or greater to when the capacitance becomes a second threshold or greater is a predetermined value or greater, or when a length in which the operation body is moved from when the capacitance becomes the first threshold or greater to when the capacitance becomes the second threshold or greater is a predetermined value or greater, the first threshold being a threshold for the capacitance, and the second threshold being greater than the first threshold.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: June 21, 2022
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Kazuhito Oshita, Daisuke Takai, Toshiki Nakamura
  • Publication number: 20210354662
    Abstract: A remote communication system includes a portable device; and a fixed system. The fixed system includes main communication modules; and a position estimating unit configured to estimate a position of the portable device, based on an incident angle of a signal from the portable device, upon detecting the signal by antennas provided in the main communication modules. When there are two main communication modules for which the incident angle is known, the position of the portable device is estimated based on the incident angle. When there is one main communication module for which the incident angle is known, the position of the portable device is estimated based on the incident angle and a received radio wave intensity of the signal. When there is no main communication module for which the incident angle is known, the position of the portable device is estimated based on the received radio wave intensity.
    Type: Application
    Filed: July 27, 2021
    Publication date: November 18, 2021
    Inventors: Yoshihisa KISHIMOTO, Keigo WAKANA, Daisuke TAKAI, Yukimitsu YAMADA, Mitsuharu NAKASATO, Kazuma SATO