Patents by Inventor Kouki Hirano

Kouki Hirano 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: 20110052205
    Abstract: A combined optical and electrical interconnection module includes a flat cable comprising an optical transmission line and an electrical wire, and a printed circuit board including a light receiving module for receiving optical signals and/or a light sending module for sending optical signals and an optical waveguide for the optical signals to be transmitted therethrough or an optical block for bending the optical paths of the optical signals. The printed circuit board is electrically and optically connected to both ends or one end of the flat cable.
    Type: Application
    Filed: August 4, 2010
    Publication date: March 3, 2011
    Applicants: Hitachi Cable, Ltd., Hitachi Cable Fine-Tech, Ltd.
    Inventors: Juhyun Yu, Kouki Hirano, Takami Ushiwata, Kenichi Murakami
  • Patent number: 7876988
    Abstract: An optical fiber mounting waveguide device and a method for fabricating the same, which provide a low optical connection loss and a high productivity. An under cladding layer (3u), a core (4), and an over cladding layer (3o) are sequentially formed on a substrate (8) to constitute an optical fiber mounting waveguide device (1). An optical fiber mounting groove (2) for mounting an optical fiber (6) is formed on the optical fiber mounting waveguide device (1). An end surface (3a) of the over cladding layer (3o) faces to the optical fiber mounting groove (2). The core (4) and the under cladding layer (3u) are projected toward the optical fiber mounting groove (2) with respect to the end surface (3a) of the over cladding layer (3o).
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: January 25, 2011
    Assignee: Hitachi Cable, Ltd.
    Inventors: Hiroki Yasuda, Kouki Hirano, Takami Ushiwata
  • Publication number: 20100247035
    Abstract: An optical wiring member according to the present invention includes: a substrate on which a light-emitting device and a light-receiving device are mounted; and an optical waveguide comprising a communication optical waveguide core and an optical waveguide clad that entirely covers the communication optical waveguide core, the optical waveguide being mounted on the substrate, in which the optical waveguide is equipped with a position-aligning light guiding portion for introducing position-aligning light into the communication optical waveguide core. By using, as a target light, the position-aligning light that is introduced into the communication optical waveguide core 3 and exits from the substrate, at least either the light-emitting device or the light-receiving device can be positioned.
    Type: Application
    Filed: March 29, 2010
    Publication date: September 30, 2010
    Inventors: Takami USHIWATA, Kouki Hirano
  • Publication number: 20100150508
    Abstract: An optical fiber mounting waveguide device includes a substrate, an optical fiber mounting groove provided on a part of the substrate for mounting an optical fiber, an under cladding layer and a core sequentially formed on the substrate, and an over cladding layer formed on the core, the over cladding layer having an end surface facing to the optical fiber mounting groove, and wherein the core and the under cladding layer are protruded toward the optical fiber mounting groove with respect to the end surface of the over cladding layer.
    Type: Application
    Filed: February 22, 2010
    Publication date: June 17, 2010
    Applicant: Hitachi Cable, Ltd.
    Inventors: Hiroki Yasuda, Kouki Hirano, Takami Ushiwata
  • Publication number: 20100092143
    Abstract: A mirror-embedded light transmission medium according to the present invention comprises: a light transmission medium including a light transmission layer, light being transmitted through the light transmission layer; a rough surface which terminates the light transmission layer, a direction of the rough surface being parallel or oblique to a light transmission direction of the light transmission layer; a reflection enhancing layer that adherently covers the rough surface; and a smooth surface formed over the reflection enhancing layer, the smooth surface reflecting the light transmitted through the light transmission layer.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 15, 2010
    Inventors: Takami Ushiwata, Kouki Hirano
  • Publication number: 20080285928
    Abstract: An optical fiber mounting waveguide device and a method for fabricating the same, which provide a low optical connection loss and a high productivity. An under cladding layer (3u), a core (4), and an over cladding layer (3o) are sequentially formed on a substrate (8) to constitute an optical fiber mounting waveguide device (1). An optical fiber mounting groove (2) for mounting an optical fiber (6) is formed on the optical fiber mounting waveguide device (1). An end surface (3a) of the over cladding layer (3o) faces to the optical fiber mounting groove (2). The core (4) and the under cladding layer (3u) are projected toward the optical fiber mounting groove (2) with respect to the end surface (3a) of the over cladding layer (3o).
    Type: Application
    Filed: May 2, 2008
    Publication date: November 20, 2008
    Applicant: HITACHI CABLE, LTD.
    Inventors: Hiroki Yasuda, Kouki Hirano, Takami Ushiwata
  • Patent number: 7133592
    Abstract: A polymer optical waveguide has a substrate, a buffer layer formed on the substrate, and a polymer waveguide main body formed on the buffer layer. The buffer layer is made of a polymer material that can absorb a difference in thermal expansion coefficient between the substrate and the polymer optical waveguide.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: November 7, 2006
    Assignee: Hitachi Cable, Ltd.
    Inventors: Hiroki Yasuda, Kouki Hirano, Tomiya Abe, Yuzo Ito
  • Publication number: 20060133762
    Abstract: A polymer optical waveguide has a substrate, a buffer layer formed on the substrate, and a polymer waveguide main body formed on the buffer layer. The buffer layer is made of a polymer material that can absorb a difference in thermal expansion coefficient between the substrate and the polymer optical waveguide.
    Type: Application
    Filed: March 16, 2005
    Publication date: June 22, 2006
    Inventors: Hiroki Yasuda, Kouki Hirano, Tomiya Abe, Yuzo Ito
  • Patent number: 6122431
    Abstract: An optical transmission member comprising a core and a clad provided on the core is provided, wherein the core consists of silicon rubber and the clad consists of tetrafluoroethylene/hexafluoropropylene/fluorovinylidene copolymer cross-linked by electron-beam, whereby an optical transmission member having improved transmission characteristics, heat resistance, flexibility and strength against buckling is provided.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: September 19, 2000
    Assignee: Hitachi Cable, Ltd.
    Inventors: Tomiya Abe, Yoshikazu Hayakawa, Masanori Matsumoto, Kouki Hirano, Fumitaka Nakahigashi
  • Patent number: 5857761
    Abstract: An illumination device comprises a light source like a halogen lamp, a light guide, a round rod-shaped transparent radiation member having a proximal end and a distal end, and a transparent radiation plate. The light guide is a plastic optical fiber comprising a single core of silicon rubber and a cladding layer of tetrafluoroethylene/hexafluoropropylene copolymer. The radiation member is a transparent circular cylinder made of acrylic resin, and has a predetermined pattern of light scattering regions on its surface oppose the directions where the light is radiated. The radiation plate is placed such a position that one side plane of the radiation plate oppose to he radiation member, and also has a predetermined pattern of light scattering regions on the back. The light scattering regions are provided along said radiation member in such a way that a ratio of an tea of one region to that of adjacent region becomes larger as the one region becomes distant from the proximal and of the radiation member.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: January 12, 1999
    Assignee: Hitachi Cable, Ltd.
    Inventors: Tomiya Abe, Kouki Hirano, Fumitaka Nakahigashi, Masanori Matsumoto, Yoshikazu Hayakawa, Tohru Sasaki