Patents by Inventor Yoshitaka Sasaki

Yoshitaka Sasaki 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: 20220303021
    Abstract: A signal processing device includes: a memory; and a processor coupled to the memory and configured to: compensate an electric field signal representing an electric field component in an optical signal input from a transmission channel for an optical frequency offset between light sources on a transmission side and a reception side of the optical signal based on a compensation value; calculate an estimated value of the optical frequency offset from data having a fixed pattern in the electric field signal; generate a plurality of candidates for the compensation value from the estimated value; calculate power of the optical signal compensated for the optical frequency offset based on each of the plurality of candidates; and select an initial value of the compensation value from the plurality of candidates based on the power of the optical signal.
    Type: Application
    Filed: December 17, 2021
    Publication date: September 22, 2022
    Applicant: FUJITSU LIMITED
    Inventors: Yoshitaka Nomura, Hisao Nakashima, Nobukazu KOIZUMI, Daisuke SASAKI, Yasuo OHTOMO
  • Patent number: 11410688
    Abstract: A thermally-assisted magnetic recording head includes a medium facing surface, a main pole, a waveguide, and a plasmon generator. A second metal layer of the plasmon generator includes a second front end facing the medium facing surface. A third metal layer of the plasmon generator includes a narrow portion located on the second metal layer. The narrow portion includes a front end face located in the medium facing surface and configured to generate near-field light from a surface plasmon, and a rear end opposite the front end face. The rear end is located farther from the medium facing surface than is the second front end.
    Type: Grant
    Filed: June 15, 2021
    Date of Patent: August 9, 2022
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Shigeki Tanemura, Hironori Araki, Yoji Nomura, Yukinori Ikegawa, Weihao Xu
  • Publication number: 20220239819
    Abstract: A control method for generating a high quality HDR image is provided. A control device of the technique of this disclosure is a control device configured to control an image capturing element capable of controlling an exposure condition for each of areas, the device including: an acquisition unit configured to acquire an exposure value map obtained by preliminary exposure using the image capturing element; and a setting unit configured to set the exposure condition including a shutter speed and an ISO sensitivity for each of the areas based on the exposure value map.
    Type: Application
    Filed: April 18, 2022
    Publication date: July 28, 2022
    Inventor: Yoshitaka Sasaki
  • Patent number: 11380353
    Abstract: A magnetic head includes a main pole, a trailing shield, a spin torque oscillator, first and second side shields, first and second gap films, and first and second guard films. The first gap film and the first guard film are interposed between the trailing shield and the first side shield. The second gap film and the second guard film are interposed between the trailing shield and the second side shield.
    Type: Grant
    Filed: May 6, 2021
    Date of Patent: July 5, 2022
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Shigeki Tanemura, Kazuki Sato, Yoji Nomura, Hironori Araki, Tetsuhito Shinohara
  • Publication number: 20220172329
    Abstract: A non-local means method is insufficient in its noise reduction effect or edge retainability due to a perfect match between blocks in a case where a reference pixel matches a target pixel. Therefore, information on a target region and plural reference regions is obtained for the target pixel. Whether the target region matches any one of the reference regions is determined from the obtained information. Switching between weight derivation methods based on similarity between the target region and the reference region is performed according to a determined result.
    Type: Application
    Filed: February 17, 2022
    Publication date: June 2, 2022
    Inventors: Kazuhiro Yahata, Yoshitaka Sasaki
  • Patent number: 11336834
    Abstract: A control method for generating a high quality HDR image is provided. A control device of the technique of this disclosure is a control device configured to control an image capturing element capable of controlling an exposure condition for each of areas, the device including: an acquisition unit configured to acquire an exposure value map obtained by preliminary exposure using the image capturing element; and a setting unit configured to set the exposure condition including a shutter speed and an ISO sensitivity for each of the areas based on the exposure value map.
    Type: Grant
    Filed: June 11, 2020
    Date of Patent: May 17, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoshitaka Sasaki
  • Publication number: 20220124237
    Abstract: An object of the present invention is to generate a high-dynamic-range image with fewer pseudo-contours. An apparatus of the present invention generates a high-dynamic-range image and includes a setting unit for setting an imaging condition for each region that constitutes an image. The apparatus includes a setting unit configured to set an exposure condition for the region and a correcting unit configured to correct the set exposure condition so that a difference between a maximum value and a minimum value out of the set exposure condition is small.
    Type: Application
    Filed: December 29, 2021
    Publication date: April 21, 2022
    Inventor: Yoshitaka Sasaki
  • Patent number: 11289117
    Abstract: A magnetic head includes a medium facing surface, a main pole, a trailing shield, and a spin torque oscillator. A bottom surface of the trailing shield includes a first portion that includes an end located in the medium facing surface and is in contact with the spin torque oscillator at least in part. An element height that is a dimension of the spin torque oscillator in a direction perpendicular to the medium facing surface and a writer height that is a dimension of the first portion in the direction perpendicular to the medium facing surface are different from each other.
    Type: Grant
    Filed: February 8, 2021
    Date of Patent: March 29, 2022
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Shigeki Tanemura, Hironori Araki, Yoji Nomura, Tetsuya Roppongi, Tetsuhito Shinohara, Ying Liu, Min Li, Alain Truong, Yuhui Tang, Wenyu Chen
  • Patent number: 11282173
    Abstract: A non-local means method is insufficient in its noise reduction effect or edge retainability due to a perfect match between blocks in a case where a reference pixel matches a target pixel. Therefore, information on a target region and plural reference regions is obtained for the target pixel. Whether the target region matches any one of the reference regions is determined from the obtained information. Switching between weight derivation methods based on similarity between the target region and the reference region is performed according to a determined result.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: March 22, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazuhiro Yahata, Yoshitaka Sasaki
  • Patent number: 11245857
    Abstract: An object of the present invention is to generate a high-dynamic-range image with fewer pseudo-contours. An apparatus of the present invention generates a high-dynamic-range image and includes a setting unit for setting an imaging condition for each region that constitutes an image. The apparatus includes a setting unit configured to set an exposure condition for the region and a correcting unit configured to correct the set exposure condition so that a difference between a maximum value and a minimum value out of the set exposure condition is small.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: February 8, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yoshitaka Sasaki
  • Patent number: 11211082
    Abstract: A magnetic head includes a medium facing surface, a main pole, a trailing shield, a spin torque oscillator, and a first insulating layer. The first insulating layer is interposed between a portion of the main pole and a portion of the spin torque oscillator. The first insulating layer has a first end closest to the medium facing surface. The spin torque oscillator has a rear end farthest from the medium facing surface. The first end of the first insulating layer is located closer to the medium facing surface than the rear end of the spin torque oscillator is.
    Type: Grant
    Filed: February 8, 2021
    Date of Patent: December 28, 2021
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Tetsuhito Shinohara, Shigeki Tanemura, Kazuki Sato, Yoji Nomura, Hironori Araki, Tetsuya Roppongi
  • Patent number: 11138761
    Abstract: An image processing apparatus to measure a color of an object based on a measurement target image obtained by imaging the object includes an acquisition unit, a derivation unit, and a calculation unit. The acquisition unit acquires the measurement target image and a reference image different from the measurement target image. The derivation unit derives a reference color based on an imaging parameter used in imaging of the measurement target image, an imaging parameter used in imaging of the reference image, and a pixel value of at least one pixel in the reference image. The calculation unit calculates, with reference to the reference color, a color evaluation value of at least one pixel corresponding to the object in the measurement target image.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: October 5, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoshitaka Sasaki
  • Patent number: 11114119
    Abstract: A thermally-assisted magnetic recording head includes a medium facing surface, a main pole, a waveguide, and a plasmon generator. The plasmon generator includes a first metal layer and a second metal layer. The first metal layer includes a plasmon exciting portion on which surface plasmons are excited. The second metal layer is located on the first metal layer, and includes a bottom surface in contact with the first metal layer, a top surface located on a side opposite to the bottom surface, a front end face that is located in the medium facing surface and generates near-field light from the surface plasmons, and a connecting surface that connects the top surface and the front end face. The connecting surface includes an inclined portion inclined relative to a direction perpendicular to the medium facing surface.
    Type: Grant
    Filed: October 2, 2020
    Date of Patent: September 7, 2021
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Shigeki Tanemura, Seiichiro Tomita
  • Patent number: 11056282
    Abstract: A capacitor includes a dielectric structure formed of a sintered dielectric, and a first electrode and a second electrode each formed of a conductor. The dielectric structure includes a wall. The first electrode and the second electrode are insulated from each other by the wall. The wall has a height which is a dimension in a first direction, and a thickness which is a dimension in a second direction orthogonal to the first direction, the height being greater than the thickness. The wall has a non-straight shape when seen in the first direction. A manufacturing method for the capacitor includes forming the dielectric structure, and forming the first electrode and the second electrode simultaneously after the formation of the dielectric structure.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: July 6, 2021
    Assignees: HEADWAY TECHNOLOGIES, INC., TDK CORPORATION
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Hironori Araki, Seiichiro Tomita, Atsushi Iijima
  • Patent number: 11049516
    Abstract: A near-field light generator includes a plasmon generator including a plasmon exciting portion on which a surface plasmon is excited, and a near-field transducer including a front end face that generates near-field light from the surface plasmon. The near-field transducer is formed of a first metal material. The plasmon generator includes a first portion formed of the first metal material and a second portion formed of a second metal material. The first portion is in contact with the near-field transducer. The second portion includes at least part of the plasmon exciting portion.
    Type: Grant
    Filed: October 13, 2020
    Date of Patent: June 29, 2021
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yukinori Ikegawa, Yoshitaka Sasaki, Hiroyuki Ito, Shigeki Tanemura, Yoji Nomura
  • Publication number: 20210004987
    Abstract: An image processing apparatus according to the present invention including a first acquisition unit configured to acquire color information of a first object obtained by capturing an image of the first object illuminated with light emitted by a light source, a second acquisition unit configured to acquire color information of a second object based on a condition determined by a direction of capturing the image of the first object, a direction of illuminating the first object with light from the light source, and a direction of a normal of the first object, and an output unit configured to output information according to the color information of the first object and the color information of the second object.
    Type: Application
    Filed: September 17, 2020
    Publication date: January 7, 2021
    Inventors: Takahiro Matsuura, Yoshitaka Sasaki, Chika Inoshita
  • Patent number: 10872624
    Abstract: A magnetic head includes a coil, a main pole, a write shield, a lower return path section, and an accommodation section. The accommodation section accommodates at least part of the return path section. A first portion of the accommodation section has a first inclined surface. A second portion of the accommodation section has a second inclined surface. A coil element of the coil has a third inclined surface opposed to the first inclined surface, and a fourth inclined surface opposed to the second inclined surface. The lower return path section includes a first inclined portion extending along the first inclined surface, and a second inclined portion extending along the second inclined surface.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: December 22, 2020
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Shigeki Tanemura, Hironori Araki, Yukinori Ikegawa
  • Patent number: 10839829
    Abstract: A magnetic head includes a medium facing surface, a coil, a main pole, and a substrate. The main pole includes a first layer, and a second layer lying on the first layer. The first layer includes a thickness-changing portion whose dimension in a direction perpendicular to a top surface of the substrate decreases with decreasing distance to the medium facing surface. At least part of the second layer is located on the thickness-changing portion.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: November 17, 2020
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Shigeki Tanemura, Tetsuya Roppongi, Kei Hirata, Atsushi Yamaguchi, Michitaka Nishiyama
  • Patent number: 10829008
    Abstract: A vehicle seat that includes: a cushion frame rear portion that is rotatable around a rear portion shaft, whose axial direction is a seat transverse direction, with respect to a vehicle body floor portion; a cushion frame front portion that is connected to the cushion frame rear portion so as to be rotatable around a center fold shaft whose axial direction is the seat transverse direction and that is positioned further toward a seat front side than the rear portion shaft; a seatback frame that stands erect from a rear end side of the cushion frame rear portion; and a driving mechanism that moves the cushion frame front portion and the cushion frame rear portion relatively in a seat vertical direction between a non-reclining state and a reclining state, in which the cushion frame rear portion tilts downward and rearward with respect to the cushion frame front portion.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: November 10, 2020
    Assignee: NHK Spring Co., Ltd.
    Inventors: Yoshitaka Sasaki, Akira Honma, Kenichi Katsube, Daisuke Tanaka, Shunichiro Osa, Takuma Oki
  • Patent number: 10803888
    Abstract: A manufacturing method for a magnetic head includes the steps of: forming a main pole; forming a spin torque oscillator; and forming a trailing shield. The step of forming the spin torque oscillator includes: a step of forming a layered film; a step of forming an interposition layer; a step of forming a mask; a first etching step of etching a portion of the interposition layer using the mask; a second etching step of etching a portion of the layered film using the mask and the interposition layer as an etching mask; a step of removing the interposition layer and the mask; and a patterning step of patterning the layered film into the spin torque oscillator.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: October 13, 2020
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Shigeki Tanemura, Hironori Araki, Yoji Nomura, Tetsuya Roppongi, Atsushi Yamaguchi