Patents by Inventor Daisuke Iwakura

Daisuke Iwakura 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: 9841552
    Abstract: A backlight device includes a light guide plate having an incident surface, a first side surface, and a second side surface. The first side surface extends from a first end of the incident surface and the second side surface extends from a second end of the incident surface. A green illuminant faces the incident surface and emits a green light toward the incident surface. A red illuminant faces the incident surface and emits a red light toward the incident surface. A white illuminant disposed on a side of at least one end of the first and second ends of the incident surface emits a white light toward the light guide plate. At least one of the emitted green light and the emitted red light includes a blue component having an emission peak wavelength in a range of 420 to 500 nm.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: December 12, 2017
    Assignee: NICHIA CORPORATION
    Inventors: Yusaku Achi, Daisuke Iwakura
  • Patent number: 9728685
    Abstract: A light emitting device includes a base that has an element mounting surface, a light emitting element that is mounted on the element mounting surface and that has maximum light intensity in a directly upward direction, and a coating member that contains a fluorescent body that is excited by light from the light emitting element, and that is constituted by a single layer that coats an upper part of the light emitting element. The fluorescent body exists at a position other than directly above the light emitting element.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: August 8, 2017
    Assignee: NICHIA CORPORATION
    Inventors: Daisuke Iwakura, Yusaku Achi
  • Patent number: 9698315
    Abstract: A light emitting device is provided which includes a light emitting element, a phosphor, and a sealing member. The light emitting element has a light emission peak wavelength in the range not shorter than 400 nm and not longer than 460 nm. The phosphor can be excited by light from the light emitting element, and emit luminescent radiation with a light emission peak wavelength in the range in not shorter than 600 nm and not longer than 700 nm. The sealing member includes a pigment for absorbing a part of the light from the light emitting element. X of the light emission chromaticity of the light emitting device falls within the range of x?0.600 in the chromaticity coordinates in the CIE 1931 color space chromaticity diagram.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: July 4, 2017
    Assignee: NICHIA CORPORATION
    Inventors: Shoji Hosokawa, Kimihiro Miyamoto, Daisuke Iwakura
  • Publication number: 20170090095
    Abstract: A light source device having; a blue light emitting element that emits blue light having an emission peak in a wavelength region of 440 nm to 460 nm; a green phosphor that absorbs part of the blue light emitted by the blue light emitting element and thereby emits green light having an emission peak in a wavelength region of 500 nm to 575 nm; a red phosphor that absorbs at least one of part of the blue light emitted by the blue light emitting element and part of the green light emitted by the green phosphor, and thereby emits red light having an emission peak in a wavelength region of 600 nm to 690 nm; and an absorbent containing neodymium fluoride that absorbs part of the green light and part of the red light.
    Type: Application
    Filed: September 27, 2016
    Publication date: March 30, 2017
    Applicant: NICHIA CORPORATION
    Inventors: Daisuke IWAKURA, Masaki HAYASHI, Shoji HOSOKAWA, Yusaku ACHI
  • Patent number: 9608180
    Abstract: A light emitting device comprises a package having a recess; a light emitting element mounted in the recess of the package; a light transmissive member provided above the light emitting element; a sealing resin that seals the recess of the package; and a fluorescent material contained in the sealing resin. The fluorescent material is distributed to a side of the light emitting element in a greater amount than to above the light emitting element, a side surface of the light emitting element is exposed to the sealing resin, and a portion of the light transmissive member protrudes from the sealing resin.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: March 28, 2017
    Assignee: NICHIA CORPORATION
    Inventor: Daisuke Iwakura
  • Publication number: 20170012185
    Abstract: A light emitting device comprises a package having a recess; a light emitting element mounted in the recess of the package; a light transmissive member provided above the light emitting element; a sealing resin that seals the recess of the package; and a fluorescent material contained in the sealing resin. The fluorescent material is distributed to a side of the light emitting element in a greater amount than to above the light emitting element, a side surface of the light emitting element is exposed to the sealing resin, and a portion of the light transmissive member protrudes from the sealing resin.
    Type: Application
    Filed: September 22, 2016
    Publication date: January 12, 2017
    Applicant: NICHIA CORPORATION
    Inventor: Daisuke IWAKURA
  • Patent number: 9484507
    Abstract: A light emitting device comprises a package having a recess; a light emitting element mounted in the recess of the package; a light transmissive member provided above the light emitting element; a sealing resin that seals the recess of the package; and a fluorescent material contained in the sealing resin. The fluorescent material is distributed to a side of the light emitting element in a greater amount than to above the light emitting element, a side surface of the light emitting element is exposed to the sealing resin, and a portion of the light transmissive member protrudes from the sealing resin.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: November 1, 2016
    Assignee: NICHIA CORPORATION
    Inventor: Daisuke Iwakura
  • Patent number: 9455382
    Abstract: A light emitting device comprising: a package having a recess; a light emitting element mounted in the recess of the package; a transmissive member provided above the light emitting element; a sealing resin that seals the recess of the package; a first fluorescent material contained in the transmissive member; and a second fluorescent material contained in the sealing resin and having a specific gravity different from that of the first fluorescent material, wherein a greater amount of the second fluorescent material is distributed to a side of the light emitting element than above the light emitting element, and a side surface of the light emitting element is exposed on the sealing resin.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: September 27, 2016
    Assignee: NICHIA CORPORATION
    Inventor: Daisuke Iwakura
  • Publication number: 20160126428
    Abstract: A light emitting device is provided which includes a light emitting element, a phosphor, and a sealing member. The light emitting element has a light emission peak wavelength in the range not shorter than 400 nm and not longer than 460 nm. The phosphor can be excited by light from the light emitting element, and emit luminescent radiation with a light emission peak wavelength in the range in not shorter than 600 nm and not longer than 700 nm. The sealing member includes a pigment for absorbing a part of the light from the light emitting element. X of the light emission chromaticity of the light emitting device falls within the range of x?0.600 in the chromaticity coordinates in the CIE 1931 color space chromaticity diagram.
    Type: Application
    Filed: October 29, 2015
    Publication date: May 5, 2016
    Applicant: NICHIA CORPORATION
    Inventors: Shoji HOSOKAWA, Kimihiro MIYAMOTO, Daisuke IWAKURA
  • Publication number: 20160091655
    Abstract: A backlight device includes a light guide plate having an incident surface, a first side surface, and a second side surface. The first side surface extends from a first end of the incident surface and the second side surface extends from a second end of the incident surface. A green illuminant faces the incident surface and emits a green light toward the incident surface. A red illuminant faces the incident surface and emits a red light toward the incident surface. A white illuminant disposed on a side of at least one end of the first and second ends of the incident surface emits a white light toward the light guide plate. At least one of the emitted green light and the emitted red light includes a blue component having an emission peak wavelength in a range of 420 to 500 nm.
    Type: Application
    Filed: September 29, 2015
    Publication date: March 31, 2016
    Applicant: NICHIA CORPORATION
    Inventors: Yusaku ACHI, Daisuke IWAKURA
  • Publication number: 20160011354
    Abstract: A backlight device includes a light guide plate including a first incident surface, and one or more second incident surfaces that are connected to the first incident surface and inclined with respect to the first incident surface in a top plan view; at least one green illuminant arranged to face one of (i) the first incident surface and (ii) the one or more second incident surfaces; and at least one red illuminant arranged to face the other of (i) the first incident surface and (ii) the one or more second incident surfaces. At least one of (i) the green light emitted from the green illuminant, and (ii) the red light emitted from the red illuminant, contains a blue component whose emission peak wavelength is 420 nm to 500 nm.
    Type: Application
    Filed: July 8, 2015
    Publication date: January 14, 2016
    Applicant: NICHIA CORPORATION
    Inventors: Yusaku ACHI, Daisuke IWAKURA
  • Publication number: 20150008464
    Abstract: A light emitting device comprising: a package having a recess; a light emitting element mounted in the recess of the package; a transmissive member provided above the light emitting element; a sealing resin that seals the recess of the package; a first fluorescent material contained in the transmissive member; and a second fluorescent material contained in the sealing resin and having a specific gravity different from that of the first fluorescent material, wherein a greater amount of the second fluorescent material is distributed to a side of the light emitting element than above the light emitting element, and a side surface of the light emitting element is exposed on the sealing resin.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Inventor: Daisuke IWAKURA
  • Publication number: 20150001565
    Abstract: A light emitting device comprises a package having a recess; a light emitting element mounted in the recess of the package; a light transmissive member provided above the light emitting element; a sealing resin that seals the recess of the package; and a fluorescent material contained in the sealing resin. The fluorescent material is distributed to a side of the light emitting element in a greater amount than to above the light emitting element, a side surface of the light emitting element is exposed to the sealing resin, and a portion of the light transmissive member protrudes from the sealing resin.
    Type: Application
    Filed: June 27, 2014
    Publication date: January 1, 2015
    Inventor: Daisuke IWAKURA
  • Publication number: 20140239332
    Abstract: A light emitting device includes a base that has an element mounting surface, a light emitting element that is mounted on the element mounting surface and that has maximum light intensity in a directly upward direction, and a coating member that contains a fluorescent body that is excited by light from the light emitting element, and that is constituted by a single layer that coats an upper part of the light emitting element. The fluorescent body exists at a position other than directly above the light emitting element.
    Type: Application
    Filed: February 27, 2014
    Publication date: August 28, 2014
    Applicant: NICHIA CORPORATION
    Inventors: Daisuke IWAKURA, Yusaku ACHI
  • Publication number: 20140124812
    Abstract: To provide a light emitting device having high light extraction efficiency, and a method for manufacturing the light emitting device. A method for manufacturing a light emitting device (100) according to the present invention, includes: forming a sealing member (40) for sealing a light emitting element (10) on a base body (30) by dropping, the base body (30) including a conductive member (20) for connecting to the light emitting element (10), and a molding (25) integrally molded with the conductive member (20); the sealing member (10) being formed such that at least a part of a periphery of the sealing member (40) is located on an outward surface (38) of the conductive member (20) or the molding (25), the outward surface facing outward in a top view.
    Type: Application
    Filed: May 15, 2012
    Publication date: May 8, 2014
    Applicant: NICHIA CORPORATION
    Inventors: Masafumi Kuramoto, Daisuke Iwakura, Kenji Ozeki, Tomoaki Tsuruha, Satoshi Okada, Masaki Hayashi
  • Patent number: 7963817
    Abstract: In a method of manufacturing a phosphor-containing molded member, an inorganic powder in a mixture with a phosphor powder is melted by using Spark Plasma Sintering method, and then cooled. In a phosphor-containing molded member, a content of the phosphor therein is 5% by weight or more.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: June 21, 2011
    Assignee: Nichia Corporation
    Inventors: Masatoshi Kameshima, Shoji Hosokawa, Hiroto Tamaki, Masatsugu Ichikawa, Shoichi Yamada, Daisuke Iwakura
  • Publication number: 20090072700
    Abstract: In a method of manufacturing a phosphor-containing molded member, an inorganic powder in a mixture with a phosphor powder is melted by using Spark Plasma Sintering method, and then cooled. In a phosphor-containing molded member, a content of the phosphor therein is 5% by weight or more.
    Type: Application
    Filed: September 18, 2008
    Publication date: March 19, 2009
    Applicant: NICHIA CORPORATION
    Inventors: Masatoshi KAMESHIMA, Shoji HOSOKAWA, Hiroto TAMAKI, Masatsugu ICHIKAWA, Shoichi YAMADA, Daisuke IWAKURA
  • Patent number: 6529662
    Abstract: An optical fiber cable enabling a reduction of diameter of the cable, without increasing the manufacturing cost, and improved in work efficiency when pulling out cores in the middle of the cable for cable connection work etc., provided with a tape core stack comprised of a stack of a plurality of tape cores each comprised of an integral assembly of a plurality of optical fibers arranged in parallel and embedded in a resin, at least one fiber cord member wound around an outer circumference of the tape core stack along its longitudinal direction, and a sheath formed outside of the tape core stack and the fiber cord member wound around the outer circumference of the tape core stack.
    Type: Grant
    Filed: August 30, 2000
    Date of Patent: March 4, 2003
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Ichiro Kobayashi, Daisuke Iwakura, Masato Kousaka, Yasuhiro Kamikura, Hideyuki Iwata
  • Patent number: 5638478
    Abstract: An optical fiber cable provided with a grooved spacer having on its outer circumference at least one SZ-spiral groove formed continuously along its longitudinal direction and at least one optical fiber tape accommodated in the groove of the grooved spacer, wherein the inverting angle, showing the rotational angle in the circumferential direction of the grooved spacer from one inverting portion of the SZ-spiral groove of the grooved spacer to the next inverting portion, is at least 180.degree.
    Type: Grant
    Filed: July 6, 1995
    Date of Patent: June 10, 1997
    Assignees: The Furukawa Electric Co., Ltd., Nippon Telegraph and Telephone Corporation
    Inventors: Daisuke Iwakura, Akihiro Otake, Kazuo Hogari, Shigekazu Hayami, Shigeru Tomita