Patents by Inventor Yukio Honda

Yukio Honda 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: 10521660
    Abstract: The image processing method includes a luminance value information obtaining step of obtaining effective radiance values from a subject, and an image generating step of generating a picture image as a set of unit regions each of which has a luminance value obtained by at least partially removing a regular reflection light component on a surface of the subject from the effective radiance values.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: December 31, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Suguru Kawabata, Takashi Nakano, Kazuhiro Natsuaki, Takahiro Takimoto, Shinobu Yamazaki, Daisuke Honda, Yukio Tamai
  • Patent number: 7411329
    Abstract: The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrated windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg<La?2.0 Lg, where La is a clearance between teeth of stator (1), and Lg is an air-gap between stator (1) and rotor (2). Outer walls of both ends of the permanent magnet (6) disposed within rotor (2) in a rim direction may be tapered toward inside from a rotor rim in a radial direction and to form a recessed section on the outer walls of the magnets. As a result, withstanding force against demagnetization is expected to increase.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: August 12, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Murakami, Yukio Honda, Shizuka Yokote, Yoshinari Asano, Yukitoshi Wada, Hideo Hirose, Yasuaki Matsushita
  • Patent number: 7408279
    Abstract: The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrated windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg<La?2.0 Lg, where La is a clearance between teeth of stator (1), and Lg is an air-gap between stator (1) and rotor (2). Outer walls of both ends of the permanent magnet (6) disposed within rotor (2) in a rim direction may be tapered toward inside from a rotor rim in a radial direction and to form a recessed section on the outer walls of the magnets. As a result, withstanding force against demagnetization is expected to increase.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: August 5, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Murakami, Yukio Honda, Shizuka Yokote, Yoshinari Asano, Yukitoshi Wada, Hideo Hirose, Yasuaki Matsushita
  • Patent number: 7399540
    Abstract: A perpendicular magnetic recording medium which has been improved to be suitable for high-density magnetic recording and a magnetic recording apparatus using the medium are provided. The magnetic back film of a dual-layer perpendicular recording medium is caused to be constituted by a plurality of layers, and a keeper layer 17 for keeping perpendicular magnetization and layers 13 and 15 for improving the recording efficiency of a recording head are functionally separated from one another. Further, the magnetization orientations of the soft magnetic films excluding the keeper layer are defined to be in the circumferential direction of the disk, whereby the frequency of occurrence of noise is decreased.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: July 15, 2008
    Assignee: Hitachi Global Storage Technologies Japan, Ltd.
    Inventors: Masaaki Futamoto, Kazuetsu Yoshida, Yukio Honda, Yoshiyuki Hirayama, Atsushi Kikugawa
  • Patent number: 7316852
    Abstract: There is provided a perpendicular magnetic recording medium comprising a non-magnetic layer having a face-centered cubic structure, an antiferromagnetic layer provided on the non-magnetic layer, a soft magnetic underlayer provided on the antiferromagnetic layer, and a perpendicular recording layer provided on the soft magnetic underlayer, which magnetic recording medium makes it possible to realize a recording density not less than 50 Gb/in2 and makes the error rate thereof low while suppressing the spike noise.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: January 8, 2008
    Assignee: Hitachi Global Storage Technologies Japan, Ltd.
    Inventors: Kiwamu Tanahashi, Atsushi Kikugawa, Noboru Shimizu, Yukio Honda, Yuzuru Hosoe
  • Publication number: 20070205687
    Abstract: The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrated windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg<La?2.0 Lg, where La is a clearance between teeth of stator (1), and Lg is an air-gap between stator (1) and rotor (2). Outer walls of both ends of the permanent magnet (6) disposed within rotor (2) in a rim direction may be tapered toward inside from a rotor rim in a radial direction and to form a recessed section on the outer walls of the magnets. As a result, withstanding force against demagnetization is expected to increase.
    Type: Application
    Filed: May 4, 2007
    Publication date: September 6, 2007
    Inventors: Hiroshi Murakami, Yukio Honda, Shizuka Yokote, Yoshinari Asano, Yukitoshi Wada, Hideo Hirose, Yasuaki Matsushita
  • Publication number: 20070205688
    Abstract: The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrated windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg<La?2.0 Lg, where La is a clearance between teeth of stator (1), and Lg is an air-gap between stator (1) and rotor (2). Outer walls of both ends of the permanent magnet (6) disposed within rotor (2) in a rim direction may be tapered toward inside from a rotor rim in a radial direction and to form a recessed section on the outer walls of the magnets. As a result, withstanding force against demagnetization is expected to increase.
    Type: Application
    Filed: May 4, 2007
    Publication date: September 6, 2007
    Inventors: Hiroshi Murakami, Yukio Honda, Shizuka Yokote, Yoshinari Asano, Yukitoshi Wada, Hideo Hirose, Yasuaki Matsushita
  • Patent number: 7233092
    Abstract: The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrated windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg<La?2.0 Lg, where La is a clearance between teeth of stator (1), and Lg is an air-gap between stator (1) and rotor (2). Outer walls of both ends of the permanent magnet (6) disposed within rotor (2) in a rim direction may be tapered toward inside from a rotor rim in a radial direction and to form a recessed section on the outer walls of the magnets. As a result, withstanding force against demagnetization is expected to increase.
    Type: Grant
    Filed: May 19, 2005
    Date of Patent: June 19, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Murakami, Yukio Honda, Shizuka Yokote, Yoshinari Asano, Yukitoshi Wada, Hideo Hirose, Yasuaki Matsushita
  • Publication number: 20070037018
    Abstract: A perpendicular magnetic recording medium which has been improved to be suitable for high-density magnetic recording and a magnetic recording apparatus using the medium are provided. The magnetic back film of a dual-layer perpendicular recording medium is caused to be constituted by a plurality of layers, and a keeper layer 17 for keeping perpendicular magnetization and layers 13 and 15 for improving the recording efficiency of a recording head are functionally separated from one another. Further, the magnetization orientations of the soft magnetic films excluding the keeper layer are defined to be in the circumferential direction of the disk, whereby the frequency of occurrence of noise is decreased.
    Type: Application
    Filed: October 18, 2006
    Publication date: February 15, 2007
    Inventors: Masaaki Futamoto, Kazuetsu Yoshida, Yukio Honda, Yoshiyuki Hirayama, Atsushi Kikugawa
  • Patent number: 7153546
    Abstract: Provided are a double-layer perpendicular magnetic recording medium having a high medium S/N at an areal recording density of 50 Gbits or more per square inch, and a magnetic storage apparatus having excellent reliability with a low error rate. The perpendicular magnetic recording medium is formed by sequentially laminating a domain control layer, an amorphous soft magnetic underlayer, an intermediate layer, and a perpendicular recording layer on a substrate. The domain control layer is a triple-layer film formed by laminating a first polycrystalline soft magnetic layer, a disordered antiferromagnetic layer, and a second polycrystalline soft magnetic layer from a substrate side.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: December 26, 2006
    Assignee: Hitachi Global Storage Technologies Japan, Ltd.
    Inventors: Kiwamu Tanahashi, Atsushi Kikugawa, Noboru Shimizu, Yukio Honda, Yuzuru Hosoe
  • Patent number: 7147941
    Abstract: A perpendicular magnetic recording medium which has been improved to be suitable for high-density magnetic recording and a magnetic recording apparatus using the medium are provided. The magnetic back film of a dual-layer perpendicular recording medium is caused to be constituted by a plurality of layers, and a keeper layer 17 for keeping perpendicular magnetization and layers 13 and 15 for improving the recording efficiency of a recording head are functionally separated from one another. Further, the magnetization orientations of the soft magnetic films excluding the keeper layer are defined to be in the circumferential direction of the disk, whereby the frequency of occurrence of noise is decreased.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: December 12, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masaaki Futamoto, Kazuetsu Yoshida, Yukio Honda, Yoshiyuki Hirayama, Atsushi Kikugawa
  • Patent number: 7138195
    Abstract: A double layer perpendicular magnetic recording medium having a high medium S/N ratio at a recording density of 50 Gb/in2 or higher and a magnetic storage apparatus with a lower error rate and excellent reliability are provided. In a perpendicular magnetic recording medium in which a soft magnetic underlayer 12, an intermediate layer 13, and a perpendicular magnetic recording layer 14 are sequentially formed on a substrate 11, the intermediate layer 13 is made to be a non-magnetic amorphous alloy, in which Ni is a main component and Zr is contained, and the soft magnetic underlayer 12 is constituted of ferromagnetic nan-crystals precipitated by annealing.
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: November 21, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Kiwamu Tanahashi, Atsushi Kikugawa, Yukio Honda, Masaaki Futamoto, Akira Ishikawa
  • Patent number: 7071584
    Abstract: A linear motor includes tubular outer yoke (4), tubular inner yoke (3) disposed in outer yoke (4), coil (2) provided to inner yoke (3), permanent magnet (5a, 5b) vibrating following a magnetic flux produced by coil (2), and vibrator (6) made of magnetic material and supporting permanent magnets (5a, 5b). Magnetic loop produced by outer yoke (4) and inner yoke (3) travels through vibrator (6) free from interference by vibrator (6) because vibrator (6) is made of magnetic material. As a result, the linear motor vibrates efficiently.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: July 4, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shinichiro Kawano, Yukio Honda, Hiroshi Murakami
  • Patent number: 7026810
    Abstract: An object is to automatically detect the positions of spike noise, create a distribution diagram, and perform pass/fail decisions. The cross-correlation function of the signal waveform from a magnetic head 1 and a reference waveform simulating spike noise is used in extraction of spike noise. The number of peaks in the cross-correlation function exceeding a threshold value is counted, and quantitative evaluation of spike noise is performed.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: April 11, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Kikugawa, Kiwamu Tanahashi, Yukio Honda, Masaaki Futamoto, Yoshiyuki Hirayama
  • Patent number: 6979924
    Abstract: The invention relates to a motor comprising a stator core having plural teeth and slots provided among the teeth, a winding applied on the teeth by a single turn, and a rotor incorporating plural permanent magnets, which is rotated and driven by utilizing reluctance torque in addition to magnet torque. By turning thus divided teeth by a single winding, the occupation rate of the winding in the slots can be raised. As a result, a motor of small size and large output can be presented.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: December 27, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Noriyoshi Nishiyama, Tomokazu Nakamura, Yasufumi Ikkai, Yukio Honda, Hiroshi Murakami, Shinichiro Kawano
  • Publication number: 20050225194
    Abstract: The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrated windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg<La?2.0 Lg, where La is a clearance between teeth of stator (1), and Lg is an air-gap between stator (1) and rotor (2). Outer walls of both ends of the permanent magnet (6) disposed within rotor (2) in a rim direction may be tapered toward inside from a rotor rim in a radial direction and to form a recessed section on the outer walls of the magnets. As a result, withstanding force against demagnetization is expected to increase.
    Type: Application
    Filed: May 19, 2005
    Publication date: October 13, 2005
    Inventors: Hiroshi Murakami, Yukio Honda, Shizuka Yokote, Yoshinari Asano, Yukitoshi Wada, Hideo Hirose, Yasuaki Matsushita
  • Publication number: 20050204285
    Abstract: An object is to automatically detect the positions of spike noise, create a distribution diagram, and perform pass/fail decisions. The cross-correlation function of the signal waveform from a magnetic head 1 and a reference waveform simulating spike noise is used in extraction of spike noise. The number of peaks in the cross-correlation function exceeding a threshold value is counted, and quantitative evaluation of spike noise is performed.
    Type: Application
    Filed: February 10, 2005
    Publication date: September 15, 2005
    Inventors: Atsushi Kikugawa, Kiwamu Tanahashi, Yukio Honda, Masaaki Futamoto, Yoshiyuki Hirayama
  • Patent number: 6940205
    Abstract: The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrating windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg<La?2.0 Lg, where La is a clearance between teeth of stator (1), and Lg is an air-gap between stator (1) and rotor (2), and yet outer walls of both ends of the permanent magnet (6) disposed within rotor (2) in a rim direction are tapered toward inside from a rotor rim in a radial direction and thus form recessed section on the outer walls of the magnets. As a result, withstanding force against demagnetization is expected to increase.
    Type: Grant
    Filed: March 7, 2000
    Date of Patent: September 6, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Murakami, Yukio Honda, Shizuka Yokote, Yoshinari Asano, Yukitoshi Wada, Hideo Hirose, Yasuaki Matsushita
  • Patent number: 6894488
    Abstract: An object is to automatically detect the positions of spike noise, create a distribution diagram, and perform pass/fail decisions. The cross-correlation function of the signal waveform from a magnetic head 1 and a reference waveform simulating spike noise is used in extraction of spike noise. The number of peaks in the cross-correlation function exceeding a threshold value is counted, and quantitative evaluation of spike noise is performed.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: May 17, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Kikugawa, Kiwamu Tanahashi, Yukio Honda, Masaaki Futamoto, Yoshiyuki Hirayama
  • Publication number: 20050042479
    Abstract: There is provided a perpendicular magnetic recording medium comprising a non-magnetic layer having a face-centered cubic structure, an antiferromagnetic layer provided on the non-magnetic layer, a soft magnetic underlayer provided on the antiferromagnetic layer, and a perpendicular recording layer provided on the soft magnetic underlayer, which magnetic recording medium makes it possible to realize a recording density not less than 50 Gb/in2 and makes the error rate thereof low while suppressing the spike noise.
    Type: Application
    Filed: September 9, 2004
    Publication date: February 24, 2005
    Inventors: Kiwamu Tanahashi, Atsushi Kikugawa, Noboru Shimizu, Yukio Honda, Yuzuru Hosoe