Patents by Inventor Koji Higuchi

Koji Higuchi 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: 20220114982
    Abstract: A display device and data driver are provided. The display device includes a plurality of data drivers provided for a predetermined number of data lines in a plurality of data lines. The plurality of data drivers receive the serialized video data signal from the display controller, generate a modulated data timing signal whose period changes within the one frame period, and supply a gradation voltage signal to each of the predetermined number of data lines for each of data periods based on a data timing of the modulated data timing signal, each of data periods corresponding to the data timing of the modulated data timing signal.
    Type: Application
    Filed: December 22, 2021
    Publication date: April 14, 2022
    Applicant: LAPIS Semiconductor Co., Ltd.
    Inventors: Hiroshi TSUCHI, Koji Higuchi
  • Patent number: 11286924
    Abstract: A control device is provided for controlling a rotation speed of an electric oil pump, including a motor and a pump mechanism connected to the motor, based on a command value input from a host device. The control device includes: a first calculator calculating a first duty value of current to be output to the motor based on a deviation between the command value and a rotation speed of the motor; a second calculator calculating a second duty value of current to be output to the motor based on a deviation between a current limit value of the motor and a current value of the motor; and a drive current determiner comparing the first duty value calculated by the first calculator and the second duty value calculated by the second calculator, and selecting the lower duty value as a duty value of current that drives the motor.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: March 29, 2022
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Yasuhiro Shirai, Koji Higuchi
  • Patent number: 11286927
    Abstract: The pump device includes a motor portion that includes a shaft rotating about a central axis and a pump portion that is driven by a motor portion via the shaft. The pump portion includes a pump rotor that rotates along with the shaft and a pump housing that includes an accommodation portion that accommodates the pump rotor. The pump housing includes a pump body that includes a first bearing portion that supports the shaft and a pump cover with an accommodation portion disposed between the pump cover and the pump body. The pump cover includes a flow path through which oil is discharged and suctioned, and includes a second bearing portion that rotatably supports the shaft and that communicates with the flow path. An end portion of the shaft on one side in the axial direction is disposed at the second bearing portion or inside the flow path.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: March 29, 2022
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Takamitsu Eto, Yoshiyuki Kobayashi, Koji Higuchi, Yutaka Hashimoto
  • Publication number: 20220068188
    Abstract: A display driver is provided. A designation of an output timing at each of first and kth output channels is received, and first and second delay pulse signals are generated at respective output timings of the first and the kth output channels. First to kth first direction delay shift signals where a first delay pulse signal is present after a delay increased for each output channel from the first toward the kth output channel are generated. First to kth second direction delay shift signals where a second delay pulse signal is present after the delay increased for each output channel from the kth toward the first output channel are generated. One whose timing at which a delay pulse signal is present is earlier is selected from each of the direction delay shift signals corresponding to the same output channel, and set as first to kth output timing signals.
    Type: Application
    Filed: August 17, 2021
    Publication date: March 3, 2022
    Applicant: LAPIS Semiconductor Co., Ltd.
    Inventor: Koji HIGUCHI
  • Publication number: 20220034315
    Abstract: An electric oil pump includes a motor including a motor shaft, a pump assembly including a vane pump driven by the motor to suction and discharge oil, and an inverter to drive the motor. The motor includes a rotor, a stator on a side outward from the rotor in a radial direction, and a motor housing containing the rotor and the stator. The motor housing includes a suction port through which the vane pump suctions oil from outside, and a discharge port through which the vane pump discharges oil to outside. The motor housing includes flat surface portions in a portion of an outer periphery thereof. The suction port and the discharge port are located in a first surface of side surfaces which are the flat surface portions of the motor housing and are parallel or substantially parallel to the axial direction.
    Type: Application
    Filed: September 20, 2019
    Publication date: February 3, 2022
    Inventors: Koji HIGUCHI, Yutaka HASHIMOTO, Yoshiyuki MAKI, Kohei KUBO
  • Patent number: 11217196
    Abstract: A display device and data driver are provided. The display device includes a plurality of data drivers provided for a predetermined number of data lines in a plurality of data lines. The plurality of data drivers receive the serialized video data signal from the display controller, generate a modulated data timing signal whose period changes within the one frame period, and supply a gradation voltage signal to each of the predetermined number of data lines for each of data periods based on a data timing of the modulated data timing signal, each of data periods corresponding to the data timing of the modulated data timing signal.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: January 4, 2022
    Assignee: LAPIS SEMICONDUCTOR CO., LTD.
    Inventors: Hiroshi Tsuchi, Koji Higuchi
  • Publication number: 20210348620
    Abstract: An electric pump provided with a pump unit configured to discharge working oil by being rotationally driven by an electric motor includes: a drive shaft configured to transmit rotational driving force from the electric motor to a rotor of the pump unit; a rotation-detection shaft provided coaxially with the drive shaft, the rotation-detection shaft being configured to be rotated together with the rotor; and a rotation detector unit configured to detect rotation of the rotation-detection shaft. The rotation-detection shaft has: an engagement portion configured to engage with the rotor; and a detection-target portion facing the rotation detector unit, and an outer diameter of the detection-target portion is set so as to be larger than an outer diameter of the engagement portion.
    Type: Application
    Filed: October 29, 2019
    Publication date: November 11, 2021
    Applicants: KYB Corporation, NIDEC TOSOK CORPORATION
    Inventors: Kohei KUBO, Tomoyuki FUJITA, Koichiro AKATSUKA, Yoshiyuki MAKI, Koji HIGUCHI, Yutaka HASHIMOTO
  • Patent number: 11089173
    Abstract: A scanner apparatus includes a housing including an insertion port into which a medium is inserted, a discharge port from which the medium is discharged, a conveying roller configured to convey the medium inserted from the scanning insertion port, and a scanning unit configured to scan the medium conveyed by the conveying roller. The scanning insertion port and the discharge port are provided on a +Y direction side of the housing. The housing includes a placement face extending in a ?Y direction from the scanning insertion port. The placement face, when a first end of the medium is inserted into the scanning insertion port, is able to support a portion of the medium on a second end side opposite to the first end. The first end of the medium is discharged from the discharge port in a direction on the +Y direction side or in a ?Z direction.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: August 10, 2021
    Assignee: Seiko Epson Corporation
    Inventors: Yuta Watanabe, Koji Higuchi, Naohiro Ueyama, Motofumi Otani
  • Publication number: 20210207598
    Abstract: The pump device includes a motor portion that includes a shaft rotating about a central axis and a pump portion that is driven by a motor portion via the shaft. The pump portion includes a pump rotor that rotates along with the shaft and a pump housing that includes an accommodation portion that accommodates the pump rotor. The pump housing includes a pump body that includes a first bearing portion that supports the shaft and a pump cover with an accommodation portion disposed between the pump cover and the pump body. The pump cover includes a flow path through which oil is discharged and suctioned, and includes a second bearing portion that rotatably supports the shaft and that communicates with the flow path. An end portion of the shaft on one side in the axial direction is disposed at the second bearing portion or inside the flow path.
    Type: Application
    Filed: March 12, 2018
    Publication date: July 8, 2021
    Inventors: Takamitsu ETO, Yoshiyuki KOBAYASHI, Koji HIGUCHI, Yutaka HASHIMOTO
  • Patent number: 11011126
    Abstract: A display device includes a display panel, a gate driver that supplies scan signals to a first to nth scan lines, a data driver that supplies gradation voltage signals corresponding to a video data signal to a plurality of data lines, and a display controller that supplies the video data signal to the data driver. The display controller supplies a first to nth pieces of display data to the data driver in units of display data pairs each including a kth piece of display data and an (n+1?k)th piece of display data. The gate driver supplies the scan signals to the plurality of scan lines. Each of the scan signals has different pulse widths depending on distance from the data driver to the respective first to nth scan lines. The data driver supplies the gradation voltage signals to the plurality of data lines on the basis of supply of the display data pairs from the display controller.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: May 18, 2021
    Assignee: LAPIS SEMICONDUCTOR CO., LTD.
    Inventors: Koji Higuchi, Kunihiro Harayama
  • Publication number: 20210095661
    Abstract: A control device is provided for controlling a rotation speed of an electric oil pump, including a motor and a pump mechanism connected to the motor, based on a command value input from a host device. The control device includes: a first calculator calculating a first duty value of current to be output to the motor based on a deviation between the command value and a rotation speed of the motor; a second calculator calculating a second duty value of current to be output to the motor based on a deviation between a current limit value of the motor and a current value of the motor; and a drive current determiner comparing the first duty value calculated by the first calculator and the second duty value calculated by the second calculator, and selecting the lower duty value as a duty value of current that drives the motor.
    Type: Application
    Filed: September 16, 2020
    Publication date: April 1, 2021
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Yasuhiro SHIRAI, Koji HIGUCHI
  • Patent number: 10962003
    Abstract: An electric oil pump apparatus includes an electric oil pump including a housing main body that accommodates a motor and a pump driven by the motor, a flange portion formed on the housing main body, and a control circuit case for accommodating a control circuit, and a base plate attached to the electric oil pump. The base plate includes an annular main body fixed to the housing main body, and a sealing member located between the annular main body and the housing main body. The annular main body includes a first surface located on one side, a second surface located on the other side, a first through hole for passing the housing main body therethrough, and an annular stepped portion configured to accommodate the sealing member, and formed along an inner edge of the first through hole. The first surface of the base plate is opposed to the flange portion.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: March 30, 2021
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Shigehiro Kataoka, Yoshiyuki Kobayashi, Koji Higuchi
  • Publication number: 20200309156
    Abstract: An electric pump device includes a motor having a rotor and a stator portions, a pump portion and a housing. The stator portion has a stator core, and coils each having a winding portion and a crossover portion. The housing has a housing body portion having a tubular shape and extending in the axial direction, and a flange portion expanding radially outward from the outer peripheral surface of the housing body portion. The flange portion has an end surface that faces toward one side in the axial direction and is disposed in the axial direction between a first and a second virtual plane. The first and the second virtual planes pass through parts of the stator core, the winding portion, and the crossover portion located respectively closest to one and the other sides in the axial direction and expanding in a direction perpendicular to a central axis.
    Type: Application
    Filed: March 10, 2020
    Publication date: October 1, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Hitoshi SAKAMOTO, Koji HIGUCHI, Kunihiro KAJITA, Tomokazu IKEDA
  • Publication number: 20200309130
    Abstract: Provided is an electric pump device which includes a motor having a shaft extending along a first central axis, a pump portion driven by the motor, and a housing for housing the motor and the pump portion. The housing includes: a housing body portion which has a bottomed tube shape and extends in an axial direction, a flange portion which expands radially outward from an outer peripheral surface of the housing body portion, and a projection portion extending from a bottom portion of the housing body portion toward one axial side. A second central axis of the projection portion is arranged at a position shifted in a radial direction from the first central axis. The flange portion has convex portions projected from the end surface facing the one axial side of the flange portion toward the one axial side.
    Type: Application
    Filed: March 18, 2020
    Publication date: October 1, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Hitoshi SAKAMOTO, Koji HIGUCHI, Kunihiro KAJITA, Tomokazu IKEDA
  • Publication number: 20200309118
    Abstract: Provided is an electric pump device which includes a motor having a shaft extending along a first central axis, a pump portion driven by the motor, and a housing for housing the motor and the pump portion. The housing includes: a housing body portion which has a bottomed tube shape and extends in an axial direction, a flange portion which expands radially outward from an outer peripheral surface of the housing body portion, a seal portion which has a ring shape extending in a circumferential direction and is arranged at a corner portion in which the outer peripheral surface of the housing body portion and an end surface facing one axial side of the flange portion are connected, and a projection portion extending from a bottom portion of the housing body portion toward one axial side. A second central axis of the projection portion is arranged at a position shifted in a radial direction from the first central axis.
    Type: Application
    Filed: March 18, 2020
    Publication date: October 1, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Hitoshi SAKAMOTO, Koji HIGUCHI, Kunihiro KAJITA, Tomokazu IKEDA
  • Publication number: 20200296240
    Abstract: A scanner apparatus includes a housing including an insertion port into which a medium is inserted, a discharge port from which the medium is discharged, a conveying roller configured to convey the medium inserted from the scanning insertion port, and a scanning unit configured to scan the medium conveyed by the conveying roller. The scanning insertion port and the discharge port are provided on a +Y direction side of the housing. The housing includes a placement face extending in a ?Y direction from the scanning insertion port. The placement face, when a first end of the medium is inserted into the scanning insertion port, is able to support a portion of the medium on a second end side opposite to the first end. The first end of the medium is discharged from the discharge port in a direction on the +Y direction side or in a ?Z direction.
    Type: Application
    Filed: May 29, 2020
    Publication date: September 17, 2020
    Inventors: Yuta WATANABE, Koji HIGUCHI, Naohiro UEYAMA, Motofumi OTANI
  • Patent number: 10713995
    Abstract: An output circuit includes a differential amplifier including an inverting input terminal, non-inverting input terminals and an output terminal, and outputs, from the output terminal, a voltage having a level corresponding to a weighted average of respective input voltage levels of the non-inverting input terminals, when the output voltage level is equal to a input voltage level of the inverting input terminal, and outputs a voltage having a level corresponding to a difference between a level corresponding to a weighted average of the respective input voltage levels of the non-inverting input terminals and the input voltage level, when which the output voltage level is different from the input voltage level; and a delay circuit that generates a delay voltage responding with a predetermined time constant with respect to a change in the output voltage level and supplies the delay voltage to the inverting input terminal.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: July 14, 2020
    Assignee: LAPIS SEMICONDUCTOR CO., LTD.
    Inventors: Hiroshi Tsuchi, Takeshi Nosaka, Koji Higuchi
  • Patent number: 10708457
    Abstract: A scanner apparatus includes a housing including an insertion port into which a medium is inserted, a discharge port from which the medium is discharged, a conveying roller configured to convey the medium inserted from the scanning insertion port, and a scanning unit configured to scan the medium conveyed by the conveying roller. The scanning insertion port and the discharge port are provided on a +Y direction side of the housing. The housing includes a placement face extending in a ?Y direction from the scanning insertion port. The placement face, when a first end of the medium is inserted into the scanning insertion port, is able to support a portion of the medium on a second end side opposite to the first end. The first end of the medium is discharged from the discharge port in a direction on the +Y direction side or in a ?Z direction.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: July 7, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Yuta Watanabe, Koji Higuchi, Naohiro Ueyama, Motofumi Otani
  • Publication number: 20200168175
    Abstract: A display device and data driver are provided. The display device includes a plurality of data drivers provided for a predetermined number of data lines in a plurality of data lines. The plurality of data drivers receive the serialized video data signal from the display controller, generate a modulated data timing signal whose period changes within the one frame period, and supply a gradation voltage signal to each of the predetermined number of data lines for each of data periods based on a data timing of the modulated data timing signal, each of data periods corresponding to the data timing of the modulated data timing signal.
    Type: Application
    Filed: November 20, 2019
    Publication date: May 28, 2020
    Applicant: LAPIS SEMICONDUCTOR CO., LTD.
    Inventors: Hiroshi Tsuchi, Koji Higuchi
  • Publication number: 20200153368
    Abstract: Provided is an electric oil pump that does not degrade assembly operability and does not require a complicated configuration. The electric oil pump includes a motor portion that has a motor shaft disposed along a center axis extending in an axial direction; a pump portion that is disposed on one side of the motor portion in the axial direction, is driven by the motor portion via the motor shaft, and suctions and ejects an oil, and an inverter portion that is disposed on one side of the pump portion in the axial direction and drives the motor portion, the motor shaft penetrates through the pump portion, and the electric oil pump further includes a rotation angle sensor that is disposed at the inverter portion and detects a rotation angle of the motor shaft.
    Type: Application
    Filed: November 6, 2019
    Publication date: May 14, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Yoshiyuki KOBAYASHI, Kazuhiro HOMMA, Koji HIGUCHI, Yutaka HASHIMOTO