Patents by Inventor Naoki Ohta

Naoki Ohta 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: 20240101923
    Abstract: This disclosure describes a zinc-free lubricating oil composition. The composition includes a major amount of an oil of lubricating viscosity having a kinematic viscosity at 100° C. in a range of about 1.5 to about 35 mm2/s and an anti-wear mixture having one or more ashless dispersants and an alkyl phosphonic acid having a structure given by wherein R is a C3-C20 hydrocarbyl group. The initial pH of the anti-wear mixture is between 5-9.5 as measured by ASTM D664.
    Type: Application
    Filed: September 14, 2021
    Publication date: March 28, 2024
    Applicant: CHEVRON JAPAN LTD.
    Inventors: Masami FUCHI, Naoya SASAKI, Takahiro NAKAGAWA, Satoshi OHTA, Naoki MASUDA, Koichi KUBO
  • Patent number: 11898913
    Abstract: An electromagnetic wave sensor 1 has electromagnetic wave absorbers disposed side by side in first and second directions, temperature detection portions held by the respective electromagnetic wave absorbers and sets of two arm portions connected to each electromagnetic wave absorber at two connection portions. In a plan view, the arm portions have two first extending portions extending from the connection portions in directions of which components in the second direction are opposite to each other, and two second extending portions extending from the first extending portions in directions of which components in the first direction are opposite to each other. Four sides of a rectangle circumscribing each of the electromagnetic wave absorbers with a smallest area are inclined with respect to the first direction in directions in which each electromagnetic wave absorber is away from the second extending portions with the connection portions as fulcrums.
    Type: Grant
    Filed: August 17, 2022
    Date of Patent: February 13, 2024
    Assignee: TDK CORPORATION
    Inventors: Shinji Hara, Naoki Ohta, Kazuya Maekawa, Susumu Aoki, Maiko Shirokawa
  • Publication number: 20240035893
    Abstract: An element array circuit includes one or more first wiring lines, second wiring lines, impedance elements, one or more operational amplifiers, one or more conversion elements, and one or more switchers. The second wiring lines each extend in a direction different from a direction of extension of the first wiring lines. The impedance elements are each coupled to one each of the first and second wiring lines. The operational amplifiers each include a positive input terminal, a negative input terminal couplable to one of the second wiring lines, and an output terminal. The conversion elements are each coupled to the negative input terminal and the output terminal, and each convert a current flowing through the second wiring line coupled to the negative input terminal into a voltage. The switchers are each coupled to one of the conversion elements and come into a conducting state or a nonconducting state.
    Type: Application
    Filed: June 29, 2023
    Publication date: February 1, 2024
    Applicant: TDK CORPORATION
    Inventors: Tadao SENRIUCHI, Naoki OHTA, Kazuya MAEKAWA, Susumu AOKI, Maiko KOKUBO, Yusuke KIMOTO, Shinji HARA
  • Publication number: 20230384725
    Abstract: An image forming apparatus includes a plurality of image forming units, an exposure device, and circuitry. Each image forming unit includes an image bearer, a charger, and a developer bearer. The circuitry acquires an image-density cycle fluctuation in a visible image for each image forming unit and performs image-density fluctuation-reduction control to cyclically change image forming conditions to reduce the image-density cycle fluctuation.
    Type: Application
    Filed: May 30, 2023
    Publication date: November 30, 2023
    Inventors: Keita SONE, Tomohide TAKENAKA, Naoki OHTA
  • Publication number: 20230326839
    Abstract: An electronic component package has an outer edge including a first side and a second side adjacent to each other. The electronic component package includes a first electronic component chip, a second electronic component chip provided at a distance from the first electronic component chip, one or more first terminals disposed along the first side, one or more second terminals disposed along the second side, and one or more first conductors. The one or more first conductors couple the one or more first terminals to the first electronic component chip, with the one or more first terminals being uncoupled to the second electronic component chip.
    Type: Application
    Filed: June 15, 2023
    Publication date: October 12, 2023
    Applicant: TDK CORPORATION
    Inventors: Yosuke KOMASAKI, Hiroshi NAGANUMA, Naoki OHTA
  • Patent number: 11769613
    Abstract: A thermistor element includes: a thermistor film; a first electrode provided in contact with one surface of the thermistor film; and a pair of second electrodes provided in contact with an other surface of the thermistor film, wherein the thermistor film is provided to cover a periphery of the first electrode.
    Type: Grant
    Filed: December 1, 2021
    Date of Patent: September 26, 2023
    Assignee: TDK CORPORATION
    Inventors: Susumu Aoki, Shinji Hara, Naoki Ohta, Maiko Shirokawa, Eiji Komura
  • Publication number: 20230296443
    Abstract: Electromagnetic wave sensor (infrared sensor) 1 has: a first substrate; a second substrate that faces the first substrate and that allows infrared rays to pass through at least a part of the second substrate; first circumferential wall 4a that is positioned between the first substrate and the second substrate and that forms first space 8a together with the first and second substrates; bolometer structures 7 that are provided in first space 8a; first measuring element 9a that is provided in first space 8a and that is used for taking a first measurement relating to pressure P1 in first space 8a; and a monitoring portion. The monitoring portion acquires the first measurement that is taken using first measuring element 9a and outputs a predetermined signal indicating an abnormality based on at least the first measurement.
    Type: Application
    Filed: March 8, 2023
    Publication date: September 21, 2023
    Inventors: Naoki OHTA, Shinji HARA, Susumu AOKI, Maiko KOKUBO, Kazuya MAEKAWA, Tadao SENRIUCHI
  • Patent number: 11721618
    Abstract: An electronic component package has an outer edge including a first side and a second side adjacent to each other. The electronic component package includes a first electronic component chip, a second electronic component chip provided at a distance from the first electronic component chip, one or more first terminals disposed along the first side, one or more second terminals disposed along the second side, and one or more first conductors. The one or more first conductors couple the one or more first terminals to the first electronic component chip, with the one or more first terminals being uncoupled to the second electronic component chip.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: August 8, 2023
    Assignee: TDK CORPORATION
    Inventors: Yosuke Komasaki, Hiroshi Naganuma, Naoki Ohta
  • Patent number: 11676744
    Abstract: A thermistor element includes: a thermistor film; a pair of first electrodes in contact with one surface of the thermistor film; an insulation film opposite to a contact side of the pair of first electrodes, the contact side on which the pair of first electrodes is in contact with the thermistor film; and at least one opening portion located in a region which overlaps each of the first electrodes when viewed in a plan view and passing through the insulation film. Each first electrode has a first portion located where each of the first electrodes and the opening portion overlap when viewed in a plan view and a second portion outside of where each of the first electrodes and the opening portion overlap when viewed in a plan view and is over the first portion and second portion to be in contact with the one surface of the thermistor film.
    Type: Grant
    Filed: February 11, 2022
    Date of Patent: June 13, 2023
    Assignee: TDK CORPORATION
    Inventors: Susumu Aoki, Shinji Hara, Naoki Ohta, Maiko Shirokawa
  • Patent number: 11668607
    Abstract: A thermistor element includes a thermistor film, a first electrode provided in contact with one surface of the thermistor film, and a pair of second electrodes provided in contact with the other surface of the thermistor film, wherein the thermistor film includes an oxide having a spinel crystal structure and having a [111] preferred orientation in a film thickness direction.
    Type: Grant
    Filed: December 1, 2021
    Date of Patent: June 6, 2023
    Assignee: TDK CORPORATION
    Inventors: Maiko Shirokawa, Shinji Hara, Naoki Ohta, Susumu Aoki, Eiji Komura
  • Publication number: 20230152732
    Abstract: An image forming apparatus includes an image bearer, a developing device, a fixing device, and circuitry. The developing device contains a developer and develops a latent image on the image bearer with the developer. The developing device includes a stirrer to stir the developer. The fixing device fixes a toner image onto a sheet. The circuitry performs start-up operations after receiving a print start command and before starting a printing operation. The start-up operations includes starting a warm-up operation of the fixing device and starting, during the warm-up operation, a stirring operation in which the stirrer stirs the developer.
    Type: Application
    Filed: September 30, 2022
    Publication date: May 18, 2023
    Applicant: Ricoh Company, Ltd.
    Inventor: Naoki Ohta
  • Publication number: 20230112733
    Abstract: A displacement detection apparatus includes a magnetic field generator, a first soft magnetic body, a second soft magnetic body, and a magnetic detection element. The magnetic field generator extends along a plane orthogonal to a first direction and includes a first portion and a second portion. The first soft magnetic body entirely overlaps the first portion in the first direction. The second soft magnetic body entirely overlaps the second portion in the first direction. The magnetic detection element is disposed in a region between the first soft magnetic body and the second soft magnetic body, and is configured to be subjected to a magnetic field generated by the magnetic field generator. The magnetic field generator, the first soft magnetic body, and the second soft magnetic body are provided to be integrally rotatable, with respect to the magnetic detection element, around a rotation axis extending in the first direction.
    Type: Application
    Filed: August 12, 2022
    Publication date: April 13, 2023
    Applicant: TDK CORPORATION
    Inventors: Yohei HIROTA, Naoki OHTA
  • Publication number: 20230062983
    Abstract: The present disclosure includes an electromagnetic wave detector, and a pair of arms that are positioned on both sides with the electromagnetic wave detector interposed therebetween. The electromagnetic wave detector includes a temperature detection element, and electromagnetic wave absorbers which cover at least a part of the temperature detection element. The structure body has a structure in which the electromagnetic wave detector is hung or suspended with respect to a substrate facing the electromagnetic wave detector via the pair of arms. Area of a surface of the pair of arms on a side facing the substrate are larger than area of surface thereof on a side opposite to the side facing the substrate.
    Type: Application
    Filed: August 18, 2022
    Publication date: March 2, 2023
    Applicant: TDK CORPORATION
    Inventors: Maiko SHIROKAWA, Shinji HARA, Naoki OHTA, Kazuya MAEKAWA, Susumu AOKI
  • Publication number: 20230068352
    Abstract: A magnetic sensor includes a first path and a second path, a plurality of structures, and a plurality of first electrodes and a plurality of second electrodes. The first path includes at least one first array. The second path includes at least one second array. The at least one first array and the at least one second array are disposed so that they are arranged in a first direction. The at least one first array and the at least one second array each include an odd number of structures disposed so that they are arranged in a second direction.
    Type: Application
    Filed: August 26, 2022
    Publication date: March 2, 2023
    Applicant: TDK CORPORATION
    Inventors: Tetsuya HIRAKI, Kenzo MAKINO, Naoki OHTA
  • Publication number: 20230064502
    Abstract: The present invention includes an electromagnetic wave detector, and a pair of arm portions and that are positioned on both sides with the electromagnetic wave detector interposed therebetween. The electromagnetic wave detector includes a temperature detection element, and electromagnetic wave absorbers which cover at least a part of the temperature detection element. Each of the arm portions includes a conductor layer which is in a line shape and electrically connected to the temperature detection element, and dielectric layers which are disposed on both sides of the conductor layer. In a short direction of the dielectric layers in a plan view, the conductor layer has a shape protruding outward beyond both end portions of the dielectric layers in the short direction.
    Type: Application
    Filed: August 18, 2022
    Publication date: March 2, 2023
    Applicant: TDK CORPORATION
    Inventors: Susumu AOKI, Shinji HARA, Naoki OHTA, Kazuya MAEKAWA, Maiko SHIROKAWA
  • Publication number: 20230065804
    Abstract: A structure body includes: an electromagnetic wave detector; and a pair of arm portions that are positioned on both sides with the electromagnetic wave detector interposed therebetween. The electromagnetic wave detector includes a temperature detection element and an electromagnetic wave absorber which covers at least a part of the temperature detection element. Each of the arm portions includes a wiring layer which is in a line shape and electrically connected to the temperature detection element, and protective layers, a part of each of which is disposed on corresponding one of both sides of the wiring layer. The protective layers are made of a material having a lower thermal conductivity than the wiring layer. In a short direction of the protective layers in a plan view, the wiring layer is positioned on an inward side of both end portions of the protective layers in the short direction.
    Type: Application
    Filed: August 18, 2022
    Publication date: March 2, 2023
    Applicant: TDK CORPORATION
    Inventors: Susumu AOKI, Shinji HARA, Naoki OHTA, Kazuya MAEKAWA, Maiko SHIROKAWA
  • Publication number: 20230054724
    Abstract: An electromagnetic wave sensor 1 has electromagnetic wave absorbers disposed side by side in first and second directions, temperature detection portions held by the respective electromagnetic wave absorbers and sets of two arm portions connected to each electromagnetic wave absorber at two connection portions. In a plan view, the arm portions have two first extending portions extending from the connection portions in directions of which components in the second direction are opposite to each other, and two second extending portions extending from the first extending portions in directions of which components in the first direction are opposite to each other. Four sides of a rectangle circumscribing each of the electromagnetic wave absorbers with a smallest area are inclined with respect to the first direction in directions in which each electromagnetic wave absorber is away from the second extending portions with the connection portions as fulcrums.
    Type: Application
    Filed: August 17, 2022
    Publication date: February 23, 2023
    Applicant: TDK CORPORATION
    Inventors: Shinji HARA, Naoki OHTA, Kazuya MAEKAWA, Susumu AOKI, Maiko SHIROKAWA
  • Publication number: 20230055177
    Abstract: An electromagnetic wave sensor has electromagnetic wave absorbers disposed side by side in first and second directions, temperature detection portions held by the respective electromagnetic wave absorbers and sets of two arm portions connected to each of the electromagnetic wave absorbers at two connection portions. In a plan view, the arm portions have two first extending portions extending from the connection portions in directions of which components in the second direction are opposite to each other, and two second extending portions extending from the first extending portions in directions of which components in the first direction are opposite to each other. Four sides of a rectangle circumscribing each of the electromagnetic wave absorbers with a smallest area are inclined with respect to the first direction in directions in which each of the electromagnetic wave absorbers approaches the second extending portions with the connection portions as fulcrums.
    Type: Application
    Filed: August 16, 2022
    Publication date: February 23, 2023
    Applicant: TDK CORPORATION
    Inventors: Shinji HARA, Naoki OHTA, Kazuya MAEKAWA, Susumu AOKI, Maiko SHIROKAWA
  • Patent number: 11573122
    Abstract: A resistive element array circuit includes word lines, bit lines, resistive elements, a selector, a differential amplifier, and a ground terminal. The word lines are coupled to a power supply. The resistive elements are each disposed at an intersection of corresponding one of the word lines and corresponding one of the bit lines. The selector is configured to select one word line and one bit line. The differential amplifier includes a positive input terminal configured to be coupled to the selected one of the bit lines which is selected by the selector, a negative input terminal configured to be coupled to non-selected one of the bit lines which is not selected by the selector and to non-selected one of the word lines which is not selected by the selector, an output terminal being coupled to the negative input terminal. The ground terminal is coupled to the positive input terminal.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: February 7, 2023
    Assignee: TDK CORPORATION
    Inventors: Naoki Ohta, Yuji Kakinuma, Shinji Hara, Susumu Aoki, Keita Kawamori, Eiji Komura
  • Patent number: 11543473
    Abstract: A magnetic sensor includes a base material, a plurality of magnets provided at predetermined spacing on the base material, and a plurality of magnetic detection parts respectively provided close to the plurality of magnets. Each of the plurality of magnetic detection parts outputs a signal in accordance with change in the magnetic field accompanying deformation of the base material.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: January 3, 2023
    Assignee: TDK Corporation
    Inventors: Naoki Ohta, Kazuya Watanabe