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).

  • Patent number: 10270937
    Abstract: An image processing device includes an external memory interface to write image data to an image memory, and an inclination correction circuit. The inclination correction circuit generates coordinate information based on inclination information, detects, from the coordinate information, a minimum sub-scanning coordinate in each of divided areas of the image data, generates first read addresses for reading the divided areas of the image data from the image memory based on the minimum sub-scanning coordinate, reads the divided areas of the image data from the image memory based on the first read addresses, writes the divided areas of the image data to an internal memory, generates second read addresses for reading the divided areas of the image data from the internal memory based on the coordinate information, and reads the divided areas of the image data from the internal memory based on the second read addresses.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: April 23, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tomonori Tanaka, Naoki Ohta, Mitsutaka Iwasaki, Yuuto Watanabe
  • Publication number: 20190079148
    Abstract: A magnetic sensor includes first and second yokes, first and second magnetoresistive elements, and a current path for passing a current through the first and second magnetoresistive elements. Each of the first and second yokes receives an input magnetic field containing an input magnetic field component in a direction parallel to a first virtual straight line Lz, and generates an output magnetic field. The output magnetic field contains an output magnetic field component in a direction parallel to a second virtual straight line Lx orthogonal to the first virtual straight line Lz. The first and second magnetoresistive elements generate respective detection values corresponding to the output magnetic field components of the output magnetic fields generates by the first and second yokes. The first and second yokes are electrically continuous with the first and second magnetoresistive elements, respectively.
    Type: Application
    Filed: July 25, 2018
    Publication date: March 14, 2019
    Applicant: TDK CORPORATION
    Inventor: Naoki OHTA
  • Publication number: 20190052267
    Abstract: A key input apparatus includes a key top capable of moving up and down through a pressing operation; a first substrate, which includes a first surface, which is positioned on the key top side, and a second surface, which is opposite to the first surface, and the first substrate supports the key top and is provided to be movable up and down along with the key top; a second substrate, which is provided between the key top and the first substrate in the direction of the up-and-down movement of the key top, and the second substrate includes a first surface, which is positioned on the first substrate side, and a second surface, which is opposite to the first surface; a magnetic field generation unit; a magnetic sensor unit, which includes a magnetic detection element that detects a magnetic field generated from the magnetic field generation unit; and an adhesion unit, which includes a soft magnetic material capable of adhering to the magnetic field generation unit.
    Type: Application
    Filed: October 15, 2018
    Publication date: February 14, 2019
    Inventor: Naoki OHTA
  • Patent number: 10148853
    Abstract: An image processing device includes a writing circuit to write image data to a first memory, a second memory with a capacity of lines, a coordinate generating circuit to generate coordinate information based on inclination information, a deviation calculating circuit to calculate a maximum deviation amount of the image data from the coordinate information, a division number calculating circuit to calculate a division number based on the number of the lines and the deviation amount, an address generating circuit to generate an address for reading each of divided areas of the image data from the first memory, a burst length calculating circuit to calculate a burst length based on the division number and a main scanning width of the image data, and a transferring circuit to read and burst-transfer the image data from the first memory to the second memory based on the address and the burst length.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: December 4, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuuto Watanabe, Tomonori Tanaka, Naoki Ohta, Mitsutaka Iwasaki
  • Patent number: 10135441
    Abstract: A key input apparatus includes a key top capable of moving up and down through a pressing operation; a first substrate, which includes a first surface, which is positioned on the key top side, and a second surface, which is opposite to the first surface, and the first substrate supports the key top and is provided to be movable up and down along with the key top; a second substrate, which is provided between the key top and the first substrate in the direction of the up-and-down movement of the key top, and the second substrate includes a first surface, which is positioned on the first substrate side, and a second surface, which is opposite to the first surface; a magnetic field generation unit; a magnetic sensor unit, which includes a magnetic detection element that detects a magnetic field generated from the magnetic field generation unit; and an adhesion unit, which includes a soft magnetic material capable of adhering to the magnetic field generation unit.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: November 20, 2018
    Assignee: TDK Corporation
    Inventor: Naoki Ohta
  • Publication number: 20180262194
    Abstract: A key input apparatus includes a key top capable of moving up and down through a pressing operation; a first substrate, which includes a first surface, which is positioned on the key top side, and a second surface, which is opposite to the first surface, and the first substrate supports the key top and is provided to be movable up and down along with the key top; a second substrate, which is provided between the key top and the first substrate in the direction of the up-and-down movement of the key top, and the second substrate includes a first surface, which is positioned on the first substrate side, and a second surface, which is opposite to the first surface; a magnetic field generation unit; a magnetic sensor unit, which includes a magnetic detection element that detects a magnetic field generated from the magnetic field generation unit; and an adhesion unit, which includes a soft magnetic material capable of adhering to the magnetic field generation unit.
    Type: Application
    Filed: November 28, 2017
    Publication date: September 13, 2018
    Inventor: Naoki OHTA
  • Publication number: 20180261760
    Abstract: A magnetic sensor is provided which can improve density of magnetoresistance effect elements without narrowing the wiring pitch. A plurality of element array layers 10 are stacked one on another, each of the element array layers including a plurality of magnetoresistance effect elements 1 arranged in parallel in an in-plane direction, and magnetoresistance effect elements 1 in the plurality of element array layers 10 are connected in series to each other.
    Type: Application
    Filed: December 8, 2017
    Publication date: September 13, 2018
    Inventors: Tetsuya HIRAKI, Naoki OHTA, Hiraku HIRABAYASHI, Yoshiaki TANAKA
  • Publication number: 20180254686
    Abstract: A magnetic sensor includes a magnetic detection element circuit that includes first and second magnetic detection elements, which are connected in series, and an output terminal, which is positioned between the first and second magnetic detection elements; an impedance matching device, which has a prescribed input voltage range and is connected to an output terminal of the magnetic detection element circuit; a first current supply source, which supplies an electric current to the magnetic detection element circuit; and a second current supply source, which supplies an electric current to the impedance matching device. A resistor is provided between the output terminal of the magnetic detection element circuit and the first current supply source and/or a reference electric potential point.
    Type: Application
    Filed: December 5, 2017
    Publication date: September 6, 2018
    Inventors: Yosuke Komasaki, Naoki Ohta, Hayato Miyashita, Takakazu Imai, Hiraku Hirabayashi, Masanori Sakai, Satoshi Abe, Tsuyoshi Umehara
  • Publication number: 20180238972
    Abstract: A magnetic sensor that is easy to ensure the height of the yoke and that is also easy to guide magnetic flux in the direction in which the magnetic field sensing film detects a magnetic field is provided. The magnetic sensor includes first magnetic field detection element 21 that has first magnetic field sensing film 38 that detects a magnetic field in first direction X, and first yoke 23 that includes first portion 23a that is located on a side of first magnetic field sensing film 38 with respect to first direction X, and second portion 23b that is in contact with first portion 23a in direction Z that is orthogonal to first direction X. The average dimension of second portion 23b in first direction X is larger than the average dimension of first portion 23a in first direction X.
    Type: Application
    Filed: August 14, 2017
    Publication date: August 23, 2018
    Inventors: Naoki OHTA, Keisuke TAKASUGI
  • Publication number: 20180231618
    Abstract: A magnetic sensor apparatus includes: a first magnetic detection element unit, which outputs a first sensor signal, and a second magnetic detection element unit, which outputs a second sensor signal, based on change in an external magnetic field; a first operation processing unit, which calculates a predetermined physical quantity based on the first sensor signal; a second operation processing unit, which calculates a predetermined physical quantity based on the second sensor signal; and a sealing unit, which seals at least the first magnetic detection element unit and the second magnetic detection element unit as a single body.
    Type: Application
    Filed: October 24, 2017
    Publication date: August 16, 2018
    Inventors: Naoki OHTA, Shunji SARUKI
  • Publication number: 20180224510
    Abstract: A magnetic sensor having a yoke that can achieve large magnetic flux density and that can be accurately formed is provided. The magnetic sensor includes magnetic field detection element 21 that detects a magnetic field in first direction X and first yoke 23 that is located near magnetic field detection element 21 and extends in second direction Z that is orthogonal to first direction X. First yoke 23 includes first portion 23a that is located away from magnetic field detection element 21 at least in first direction X and second portion 23b that is located farther away from magnetic field detection element 21 than first portion 23a with respect to second direction Z. The second portion 23b has surface 23f that is opposite to interface 23d with the first portion 23a, surface 23f having a curved shape that protrudes in a direction away from the first portion 23a.
    Type: Application
    Filed: August 17, 2017
    Publication date: August 9, 2018
    Inventors: Naoki OHTA, Keisuke TAKASUGI
  • Publication number: 20180172781
    Abstract: A triaxial magnetic sensor that can detect with high precision magnetic fields in three axial directions comprises a substrate having a first surface and a second surface opposite the first surface, and a magnetic sensor element group provided on the first surface. The magnetic sensor element group includes a first magnetic sensor element for magnetic detection in the x-axis direction, a second magnetic sensor element for magnetic detection in the y-axis direction and a third magnetic sensor element for magnetic detection in the z-axis direction. The first through third magnetic sensor elements respectively contain first through third magneto-resistive effect elements composed of laminated bodies including at least a magnetization fixed layer and a free layer, and the magnetization direction of each of the magnetization fixed layers of the first through third magneto-resistive elements is fixed in a direction inclined at a prescribed angle with respect to the first surface.
    Type: Application
    Filed: September 26, 2017
    Publication date: June 21, 2018
    Inventors: Naoki OHTA, Hirokazu TAKAHASHI, Satoshi MIURA
  • Publication number: 20180094950
    Abstract: A magnetoresistive element is provided with a plurality of magnetoresistive laminated bodies arranged in an array and a plurality of lead electrodes that electrically connect the plurality of magnetoresistive laminated bodies in series. A first lead electrode electrically connected to a first surface in the lamination direction of a first magnetoresistive laminated body among the plurality of magnetoresistive laminated bodies and a second lead electrode electrically connected to a first surface in the lamination direction of a second magnetoresistive laminated body adjacent in the series direction are electrically connected without a magnetoresistive laminated body being interposed in between.
    Type: Application
    Filed: July 18, 2017
    Publication date: April 5, 2018
    Inventor: Naoki OHTA
  • Patent number: 9900465
    Abstract: An image processing device includes a writing circuit to write image data to an image memory and detect a write line number, a coordinate generating circuit to generate coordinate information based on inclination information, detect a minimum sub-scanning coordinate in each of divided areas of the image data, and generate first read addresses for reading the divided areas from the image memory, a reading circuit to read the divided areas from the image memory and detect a read line number, a reading control circuit to bring the reading circuit into a standby state and cancel the standby state, and a memory control circuit to generate write addresses for writing the divided areas to a memory, sequentially write the read divided areas to the memory, generate second read addresses for reading the divided areas from the memory, and sequentially read the divided areas from the memory.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: February 20, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Naoki Ohta, Tomonori Tanaka, Mitsutaka Iwasaki, Yuuto Watanabe
  • Publication number: 20170195518
    Abstract: An image processing device includes a writing circuit to write image data to a first memory, a second memory with a capacity of lines, a coordinate generating circuit to generate coordinate information based on inclination information, a deviation calculating circuit to calculate a maximum deviation amount of the image data from the coordinate information, a division number calculating circuit to calculate a division number based on the number of the lines and the deviation amount, an address generating circuit to generate an address for reading each of divided areas of the image data from the first memory, a burst length calculating circuit to calculate a burst length based on the division number and a main scanning width of the image data, and a transferring circuit to read and burst-transfer the image data from the first memory to the second memory based on the address and the burst length.
    Type: Application
    Filed: December 14, 2016
    Publication date: July 6, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuuto WATANABE, Tomonori TANAKA, Naoki OHTA, Mitsutaka IWASAKI
  • Publication number: 20170187917
    Abstract: An image processing device includes an external memory interface to write image data to an image memory, and an inclination correction circuit. The inclination correction circuit generates coordinate information based on inclination information, detects, from the coordinate information, a minimum sub-scanning coordinate in each of divided areas of the image data, generates first read addresses for reading the divided areas of the image data from the image memory based on the minimum sub-scanning coordinate, reads the divided areas of the image data from the image memory based on the first read addresses, writes the divided areas of the image data to an internal memory, generates second read addresses for reading the divided areas of the image data from the internal memory based on the coordinate information, and reads the divided areas of the image data from the internal memory based on the second read addresses.
    Type: Application
    Filed: December 7, 2016
    Publication date: June 29, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Tomonori TANAKA, Naoki OHTA, Mitsutaka IWASAKI, Yuuto WATANABE
  • Publication number: 20170187916
    Abstract: An image processing device includes a writing circuit to write image data to an image memory and detect a write line number, a coordinate generating circuit to generate coordinate information based on inclination information, detect a minimum sub-scanning coordinate in each of divided areas of the image data, and generate first read addresses for reading the divided areas from the image memory, a reading circuit to read the divided areas from the image memory and detect a read line number, a reading control circuit to bring the reading circuit into a standby state and cancel the standby state, and a memory control circuit to generate write addresses for writing the divided areas to a memory, sequentially write the read divided areas to the memory, generate second read addresses for reading the divided areas from the memory, and sequentially read the divided areas from the memory.
    Type: Application
    Filed: December 7, 2016
    Publication date: June 29, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Naoki OHTA, Tomonori TANAKA, Mitsutaka IWASAKI, Yuuto WATANABE
  • Patent number: 9097561
    Abstract: Provided is a position transducer which can be manufactured at low cost, improve the signal-to-noise ratio of an output obtained from a detector, and obtain a stable output even if the temperature changes. A position transducer 100 includes a butterfly-shaped reflector 7 attached to a rotating shaft 2 of a rotation restriction motor 1, an LED die 4 disposed to face a central portion of the reflection surface of the reflector 7, a diffused-light absorbing member disposed on the surfaces of a diffused light absorber 3 and a case 5, installed on the fixed side of the motor 1 so as to surround the reflector 7 with a distance from the reflector 7 at the rear of the reflector 7 as viewed from the LED die 4 and absorbing illumination light from the LED die 4 which has not illuminated the reflection surface, and detectors 11 mounted on the same printed circuit board 6 as the LED die 4 to detect an image reflected by the reflector 7.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: August 4, 2015
    Assignees: CITIZEN CHIBA PRECISION CO., LTD., CITIZEN HOLDINGS CO., LTD.
    Inventors: Hideaki Sato, Kazunari Ogata, Naoki Ohta, Asuka Moritaku, Tomonori Takeda
  • Publication number: 20150153204
    Abstract: Provided is a position transducer which can be manufactured at low cost, improve the signal-to-noise ratio of an output obtained from a detector, and obtain a stable output even if the temperature changes. A position transducer 100 includes a butterfly-shaped reflector 7 attached to a rotating shaft 2 of a rotation restriction motor 1, an LED die 4 disposed to face a central portion of the reflection surface of the reflector 7, a diffused-light absorbing member disposed on the surfaces of a diffused light absorber 3 and a case 5, installed on the fixed side of the motor 1 so as to surround the reflector 7 with a distance from the reflector 7 at the rear of the reflector 7 as viewed from the LED die 4 and absorbing illumination light from the LED die 4 which has not illuminated the reflection surface, and detectors 11 mounted on the same printed circuit board 6 as the LED die 4 to detect an image reflected by the reflector 7.
    Type: Application
    Filed: October 25, 2013
    Publication date: June 4, 2015
    Inventors: Hideaki Sato, Kazunari Ogata, Naoki Ohta, Asuka Moritaku, Tomonori Takeda
  • Patent number: 8786280
    Abstract: A magneto-resistance effect element for a sensor to sense a variation in externally applied magnetism includes a pinned layer having a fixed magnetization direction, a free layer having a magnetization direction which varies in response to an external magnetic field, and an intermediate layer provided between the pinned layer and the free layer. The pinned layer has a planar shape which is long in the fixed magnetization direction and which is short in a direction orthogonal to the fixed magnetization direction. Moreover, the pinned layer preferably has a planar shape in which the pinned layer is divided into a plurality of sections.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: July 22, 2014
    Assignee: TDK Corporation
    Inventors: Hiroshi Yamazaki, Hiraku Hirabayashi, Naoki Ohta