Patents by Inventor Hidetoshi Hiraoka

Hidetoshi Hiraoka 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: 11178493
    Abstract: An electroacoustic transducer includes: a diaphragm; a magnetic circuit having a magnetic gap; a frame that holds the diaphragm and the magnetic circuit; a voice coil having one end portion positioned within the magnetic gap and the other end portion coupled to the diaphragm; and a low friction material that is disposed in a sliding portion formed by the voice coil and the magnetic circuit, and includes polymer compounds swollen with liquid.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: November 16, 2021
    Assignees: Panasonic Corporation, KYOTO UNIVERSITY, National University Corporation YOKOHAMA National University
    Inventors: Hidetoshi Hiraoka, Yoshinobu Tsujii, Keita Sakakibara, Ken Nakano
  • Publication number: 20200228900
    Abstract: An electroacoustic transducer includes: a diaphragm; a magnetic circuit having a magnetic gap; a frame that holds the diaphragm and the magnetic circuit; a voice coil having one end portion positioned within the magnetic gap and the other end portion coupled to the diaphragm; and a low friction material that is disposed in a sliding portion formed by the voice coil and the magnetic circuit, and includes polymer compounds swollen with liquid.
    Type: Application
    Filed: March 26, 2020
    Publication date: July 16, 2020
    Applicants: PANASONIC CORPORATION, KYOTO UNIVERSITY, National University Corporation YOKOHAMA National University
    Inventors: Hidetoshi HIRAOKA, Yoshinobu TSUJII, Keita SAKAKIBARA, Ken NAKANO
  • Patent number: 10405119
    Abstract: A loudspeaker diaphragm includes a main material containing molecules each having a hydroxyl group, and a diamondoid derivative. The diamondoid derivative contains molecules each having two or more hydrogen-bonding functional groups. Each of the two or more hydrogen-bonding functional groups in each of the molecules of the diamondoid derivative is bonded to the hydroxyl group in each of the molecules of the main material.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: September 3, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Hidetoshi Hiraoka
  • Patent number: 10327085
    Abstract: A loudspeaker diaphragm includes a base layer and a coating layer. The base layer contains natural fibers. The coating layer is formed on at least one of surfaces of the base layer. The coating layer is composed of chitin nanofibers each having a higher elastic modulus than that of the base layer.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: June 18, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Hidetoshi Hiraoka
  • Publication number: 20180270596
    Abstract: A loudspeaker diaphragm contains a thermosetting resin as a principal component, and the thermosetting resin includes clicyclopentacliene serving as a framework structure.
    Type: Application
    Filed: February 1, 2018
    Publication date: September 20, 2018
    Inventor: HIDETOSHI HIRAOKA
  • Publication number: 20180270597
    Abstract: A loudspeaker diaphragm includes a main material containing molecules each having a hydroxyl group, and a diamondoid derivative. The diamondoid derivative contains molecules each having two or more hydrogen-bonding functional groups. Each of the two or more hydrogen-bonding functional groups in each of the molecules of the diamondoid derivative is bonded to the hydroxyl group in each of the molecules of the main material.
    Type: Application
    Filed: February 6, 2018
    Publication date: September 20, 2018
    Inventor: HIDETOSHI HIRAOKA
  • Publication number: 20180270595
    Abstract: A loudspeaker diaphragm includes a base layer and a coating layer. The base layer contains natural fibers. The coating layer is formed on at least one of surfaces of the base layer. The coating layer is composed of chitin nanofibers each having a higher elastic modulus than that of the base layer.
    Type: Application
    Filed: January 15, 2018
    Publication date: September 20, 2018
    Inventor: HIDETOSHI HIRAOKA
  • Patent number: 8508492
    Abstract: In a touch panel, one of conductive layers on a bottom of an upper substrate and on a top of a lower substrate is formed of belt-shaped conductive layers. The other is a single conductive layer facing the belt-shaped conductive layers. The single conductive layer is provided with a pair of electrodes in positions corresponding to both ends in a direction where the belt-shaped conductive layers extend. When the upper substrate is pressed while a voltage is applied between the pair of electrodes, the top and lower conductive layers contact with each other. Then, a voltage value corresponding to the pressed position in the direction where the belt-shaped conductive layers extend is generated from any of the belt-shaped conductive layers. From the voltage value and the position of the belt-shaped conductive layer from which the voltage value is generated, a pressed position on the upper substrate can be detected.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: August 13, 2013
    Assignee: Panasonic Corporation
    Inventors: Koji Tanabe, Hirotoshi Watanabe, Hidetoshi Hiraoka, Kenichi Matsumoto
  • Publication number: 20100207907
    Abstract: In a touch panel, one of conductive layers on a bottom of an upper substrate and on a top of a lower substrate is formed of belt-shaped conductive layers. The other is a single conductive layer facing the belt-shaped conductive layers. The single conductive layer is provided with a pair of electrodes in positions corresponding to both ends in a direction where the belt-shaped conductive layers extend. When the upper substrate is pressed while a voltage is applied between the pair of electrodes, the top and lower conductive layers contact with each other. Then, a voltage value corresponding to the pressed position in the direction where the belt-shaped conductive layers extend is generated from any of the belt-shaped conductive layers. From the voltage value and the position of the belt-shaped conductive layer from which the voltage value is generated, a pressed position on the upper substrate can be detected.
    Type: Application
    Filed: April 27, 2010
    Publication date: August 19, 2010
    Inventors: Koji TANABE, Hirotoshi Watanabe, Hidetoshi Hiraoka, Kenichi Matsumoto
  • Patent number: 7717764
    Abstract: A method of manufacturing an image display panel, having one or more cells formed in an isolated manner from one another by partition walls and accommodating image display media and a plurality of image display elements, in which the image display media are sealed between opposed two substrates, at least one of the two substrates being transparent, and, in which the image display media, to which an electrostatic field is applied, are made to move so as to display an image, characterized in that the improvement comprises the steps of: (1) manufacturing a substrate with the partition walls on one substrate; applying an adhesive mixture obtained by mixing a photo-curing resin and a heat-hardening resin on the partition walls; and then connecting the other substrate to the partition walls through the adhesive mixture, the steps of: (2) manufacturing a substrate with the partition walls by forming the partition walls on one substrate; performing a washing by a dry treatment with respect to the thus manufactured su
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: May 18, 2010
    Assignee: Bridgestone Corporation
    Inventors: Taichi Kobayashi, Hidetoshi Hiraoka, Takanori Shoji
  • Patent number: 7580179
    Abstract: A method of manufacturing an information display device having an information display panel, in which display media are sealed between two substrates, at least one substrate being transparent, and, in which the display media, to which an electrostatic field is applied, are made to move so as to display information such as an image, is characterized in that the improvement comprises, in the case of electrically connecting an electrode arranged on one substrate and an electrode arranged on the other substrate at an outer portion of an information display portion of the information display panel, the steps of: arranging an adhesive including conductive spacer particles having a diameter smaller than a distance between the electrodes arranged on the substrates at a predetermined portion between the substrates; and pressing a portion of the substrate, to which the adhesive is arranged, under pressure; so that the electrode arranged on one substrate is electrically connected to the electrode arranged on the other s
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: August 25, 2009
    Assignee: Bridgestone Corporation
    Inventors: Ryo Sakurai, Takanori Shoji, Hidetoshi Hiraoka, Taichi Kobayashi
  • Patent number: 7569649
    Abstract: A film forming composition includes a compound having a cage structure; and a compound having a conjugated diene structure.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: August 4, 2009
    Assignee: FUJIFILM Corporation
    Inventor: Hidetoshi Hiraoka
  • Patent number: 7535539
    Abstract: An image display device which comprises an image display panel, in which particles or liquid powders as image display media are sealed in cells formed in an isolated manner from one another by partition walls between two opposed substrates, at least one of two substrates being transparent, and, in which the particles or the liquid powders, to which an electrostatic field is applied, are made to move so as to display an image, is characterized in that: (1) the partition walls are manufactured by a photolithography method, and a shape of the partition wall is a taper shape such that a width of an end portion at a side of a rear substrate is larger than that at a side of a front substrate; (3-1) a plurality of cells are arranged in such a manner that they do not correspond one for one to the positions of pixels for displaying the image; (3-2) a ratio of cell area/pixel area is formed to be smaller than 4; and (2) the image display panel is manufactured by: forming a first layer made of photosensitive color compo
    Type: Grant
    Filed: February 7, 2006
    Date of Patent: May 19, 2009
    Assignee: Bridgestone Corporation
    Inventors: Ryou Sakurai, Hidetoshi Hiraoka, Taichi Kobayashi, Takanori Shoji, Hajime Tamura, Shinichi Kita
  • Publication number: 20090104371
    Abstract: A film forming composition is provided that includes (A) a radical polymerization initiator, and (B-1) a compound represented by Formula (1) below and/or a polymer polymerized using at least a compound represented by Formula (1) below, and/or (B-2) a compound represented by Formula (2) below and/or a polymer polymerized using at least a compound represented by Formula (2) below (in Formula (1), the two R1s denote groups consisting only of carbon and hydrogen, which may be identical to or different from each other, and may be linked to each other to form a 6- or higher-membered ring structure, and the R2s denote hydrogen atoms or are represented by Formula (3) below and may be identical to or different from each other provided that at least one of the R2s is represented by Formula (3)) (in Formula (2), the two R4s and the two R5s denote groups consisting only of carbon and hydrogen, which may be identical to or different from each other, R4 and R4, and R5 and R5 may be linked to each other to form a 6-
    Type: Application
    Filed: September 16, 2008
    Publication date: April 23, 2009
    Applicant: FUJIFILM CORPORATION
    Inventors: Hidetoshi Hiraoka, Makoto Muramatsu
  • Publication number: 20090059347
    Abstract: In an information display panel, in which display media are sealed in a plurality of cells formed by partition walls between two opposed substrates, at least one of two substrates being transparent, and, in which the display media, to which an electrostatic field is applied, are made to move so as to display information such as an image, a tensile elastic modulus of the partition wall is controlled in a range of 10-100 MPa and a breaking elongation of the partition wall is controlled in a range of 2-500%.
    Type: Application
    Filed: April 11, 2006
    Publication date: March 5, 2009
    Applicant: Bridgestone Corporation
    Inventors: Hidetoshi Hiraoka, Ryo Sakurai
  • Patent number: 7495820
    Abstract: An information display device has an information display plate where at least one or more kinds of particles are sealed between cells formed by a partition wall, the cells being between two opposite substrates at least either of which is transparent. At least either of electrodes is provided on a substrate, and an electric field is applied to the particles by the electrodes to move the particles, causing information such as an image to be displayed on the display plate. The surfaces of the substrates are smoothed by making D?2H satisfied, with D being the diameter of a particle (a particle forming the particles), H the height of the electrodes. This thins the electrodes as much as possible (making the height of the electrodes small) and smoothes the surfaces of the substrates, and as a result, the information display device after an endurance test has an improved contrast ratio.
    Type: Grant
    Filed: February 3, 2005
    Date of Patent: February 24, 2009
    Assignee: Bridgestone Corporation
    Inventors: Ryo Sakurai, Takanori Shoji, Taichi Kobayashi, Hidetoshi Hiraoka
  • Patent number: 7483202
    Abstract: In an image display panel: in which at least one group of particles or liquid particles is sealed between opposed substrates, at least one of two substrates being transparent; in which the particles or the liquid powders, to which an electrostatic field is applied, are made to move so as to display an image; and in which partition walls arranged between the substrates according to need, use is made of the substrate in which at least a surface, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (first aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (second aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is coated by a material having a small charge decay property (third aspect), a universal hardness of a binder resin used for a material constituting the partition wall is not less than 400 N/mm2, whi
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: January 27, 2009
    Assignee: Bridgestone Corporation
    Inventors: Ryo Sakurai, Hidetoshi Hiraoka, Taichi Kobayashi, Hirotaka Yamazaki, Hajime Kitano
  • Publication number: 20080227943
    Abstract: A method of storing a coating solution for forming an interlayer insulating film for a semiconductor device, the method includes: storing a coating solution for forming an interlayer insulating film for a semiconductor device in a vessel having a wetted surface made of a plastic, and the coating solution containing at least one silane coupling agent.
    Type: Application
    Filed: March 12, 2008
    Publication date: September 18, 2008
    Applicant: FUJIFILM CORPORATION
    Inventor: Hidetoshi HIRAOKA
  • Publication number: 20080174854
    Abstract: In an image display panel: in which at least one group of particles or liquid particles is sealed between opposed substrates, at least one of two substrates being transparent; in which the particles or the liquid powders, to which an electrostatic field is applied, are made to move so as to display an image; and in which partition walls arranged between the substrates according to need, use is made of the substrate in which at least a surface, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (first aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (second aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is coated by a material having a small charge decay property (third aspect), a universal hardness of a binder resin used for a material constituting the partition wall is not less than 400 N/mm2, whi
    Type: Application
    Filed: March 21, 2008
    Publication date: July 24, 2008
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Ryo SAKURAI, Hidetoshi Hiraoka, Taichi Kobayashi, Hirotaka Yamazaki, Hajime Kitano
  • Patent number: 7369299
    Abstract: In an image display panel: in which at least one group of particles or liquid particles is sealed between opposed substrates, at least one of two substrates being transparent; in which the particles or the liquid powders, to which an electrostatic field is applied, are made to move so as to display an image; and in which partition walls arranged between the substrates according to need, use is made of the substrate in which at least a surface, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (first aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (second aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is coated by a material having a small charge decay property (third aspect), a universal hardness of a binder resin used for a material constituting the partition wall is not less than 400 N/mm2, whi
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: May 6, 2008
    Assignee: Bridgestone Corporation
    Inventors: Ryo Sakurai, Hidetoshi Hiraoka, Taichi Kobayashi, Hirotaka Yamazaki, Hajime Kitano