Patents by Inventor Tsuyoshi OKAHISA

Tsuyoshi OKAHISA 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: 20220252238
    Abstract: A light source device includes: a plurality of independently operable light emitting devices; a first lens facing the light emitting devices; and a second lens facing the first lens. A lower face of the first lens facing the light emitting devices includes: an entrance part located in a center where light from the light emitting devices enters, and a light guide part located outward of the entrance part and configured to guide light entering the entrance part. A lower face of the second lens facing the first lens includes a Fresnel lens face including a plurality of annular protruding portions.
    Type: Application
    Filed: April 28, 2022
    Publication date: August 11, 2022
    Applicant: NICHIA CORPORATION
    Inventors: Norimasa YOSHIDA, Tsuyoshi OKAHISA
  • Publication number: 20220252241
    Abstract: A light source device includes: a light emitting device having an upper face comprising a light emission face; a first lens facing the light emitting device; and a second lens facing the first lens. A lower face of the first lens facing the light emitting device includes an entrance part provided in a center of the lower face where light from the light emitting device enters, and a light guide part provided on an outside of the entrance part to guide the light entering the entrance part. A lower face of the second lens facing the first lens includes a Fresnel lens face composed of a plurality of annular protruding portions.
    Type: Application
    Filed: April 28, 2022
    Publication date: August 11, 2022
    Applicant: NICHIA CORPORATION
    Inventors: Norimasa YOSHIDA, Tsuyoshi OKAHISA
  • Publication number: 20220205614
    Abstract: A light-emitting device includes a light-emitting element, a first wavelength converting member, a second wavelength converting member, and a first light-transmissive member. The first light-transmissive member is located between the first wavelength converting member and the second wavelength converting member. The first light-transmissive member has a refractive index smaller than a refractive index of a base material of the one of the first wavelength converting member and the second wavelength converting member having a shorter peak emission wavelength than the other of the first wavelength converting member and the second wavelength converting member. Each of corresponding surfaces of lateral surfaces of the first wavelength converting member, lateral surfaces of the first light-transmissive member, and lateral surfaces of the second wavelength converting member may constitute a continuous light-emission surface.
    Type: Application
    Filed: December 22, 2021
    Publication date: June 30, 2022
    Applicant: NICHIA CORPORATION
    Inventors: Keiji EMURA, Tsuyoshi OKAHISA
  • Patent number: 11366261
    Abstract: A light source device includes a substrate having an upper surface including mounting areas; light-emitting elements on the upper surface of the substrate in the mounting areas; a light-shielding member on an upper surface of at least one of the light-emitting elements; and a light guide member defining, in a lower surface, first recesses and at least one second recess. The light-emitting elements are disposed on the mounting areas in the first recesses. Light emitted from the light-emitting elements enters the light guide member through first inner surfaces defining the first recesses, is reflected at second inner surfaces defining the second recess toward the upper surface of the light guide member, is emitted from the upper surface of the light guide member, and illuminates illumination areas at positions that are point-symmetrical, with respect to a point above the substrate, to the mounting areas where the light-emitting elements are disposed.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: June 21, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Tsuyoshi Okahisa, Norimasa Yoshida
  • Publication number: 20220173271
    Abstract: A light source includes light emission units and a light shielding member. At least one of the light emission units includes a light emitting element, a wavelength conversion member, and a light transmissive member. The light transmissive member includes a first region positioned above the light emitting element and a second region positioned outward from the first region. The second region has a thickness smaller than a thickness of the first region. The wavelength conversion member is larger than the light emission face of the light emitting element in a top view. The light shielding member is continuously disposed between adjacent ones of the light emission units and covers a lateral face of the light emitting element and a lateral face of the wavelength conversion member. A lateral face of the light transmissive member in the light emission unit is at least partially exposed from the light shielding member.
    Type: Application
    Filed: November 29, 2021
    Publication date: June 2, 2022
    Inventors: Shintaro NOMA, Tsuyoshi OKAHISA
  • Publication number: 20220173283
    Abstract: A light-emitting device includes: a light-emitting element emitting a first light having a first peak wavelength; a first wavelength conversion member contacting a side surface of the light-emitting element and including a wavelength conversion material absorbing at least a portion of the first light and emitting a second light having a second peak wavelength different from the first peak wavelength; a second wavelength conversion member on the first wavelength conversion member, the second wavelength conversion member including a wavelength conversion material absorbing at least a portion of the first light and emitting a third light having a third peak wavelength different from the first and second peak wavelengths; and a first light-reflective member on the second wavelength conversion member and at least on the light-emitting element. A continuous light-emitting surface includes a side surface of the first wavelength conversion member and a side surface of the second wavelength conversion member.
    Type: Application
    Filed: November 30, 2021
    Publication date: June 2, 2022
    Applicant: NICHIA CORPORATION
    Inventors: Keiji EMURA, Tsuyoshi OKAHISA
  • Publication number: 20220146074
    Abstract: A light source device includes: a light source having an upper surface including a light-emitting surface, the light source comprising a plurality of light-emitting parts arranged in a two-dimensional array; a lens located above and spaced apart from the light-emitting surface of the light source, wherein the lens comprises an optically functional part, and a flange part located along an outer periphery of the optically functional part; and a support part formed of a light-shielding material and configured to support at least the flange part of the lens. A surface area of a first surface of the optically functional part is greater than a surface area of a second surface of the optically functional part. The flange part defines at least one first recess in a surface located at a same side as the second surface.
    Type: Application
    Filed: November 8, 2021
    Publication date: May 12, 2022
    Applicant: NICHIA CORPORATION
    Inventors: Daizo KIBA, Takashi MATSUDA, Tsuyoshi OKAHISA
  • Patent number: 11287622
    Abstract: A light source module comprising: a light source having an upper surface comprising a light emission surface; and a light guide member including a lens portion having a central axis that extends through a center of the light emission surface. The lens portion includes: an incidence surface, a reflection surface, and an emitting surface. The incidence surface comprises an upper incidence region positioned on an upper side, and a lower incidence region positioned lower than the upper incidence region, in a cross section that includes the central axis. The lower incidence region has 2-fold rotational symmetry. The lower incidence region includes a first lower incidence region, and a second lower incidence region at a position rotated by 45 degrees from the first lower incidence region. A height of the second lower incidence region is greater than a height of the first lower incidence region.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: March 29, 2022
    Assignee: NICHIA CORPORATION
    Inventor: Tsuyoshi Okahisa
  • Publication number: 20220066267
    Abstract: A light-emitting device includes a wiring board, a plurality of light-emitting elements disposed on the wiring board, a light-reflecting member covering a lateral surface of each of the plurality of light-emitting elements, a plurality of light-transmitting layers each located above an emission surface of a corresponding one of the plurality of light-emitting elements, a plurality of light-reflecting layers disposed on the plurality of light-transmitting layers, respectively, a light-diffusing layer disposed above the plurality of light-reflecting layers and the light-reflecting member, and a low-refractive-index layer located between the light-reflecting member and the light-diffusing layer, around each pair of one of the plurality of light-transmitting layers and one of the light-reflecting layers, and having a refractive index lower than that of the plurality of light-transmitting layers.
    Type: Application
    Filed: August 30, 2021
    Publication date: March 3, 2022
    Applicant: NICHIA CORPORATION
    Inventors: Takuya NAKABAYASHI, Ryohei YAMASHITA, Keiji EMURA, Tsuyoshi OKAHISA, Toshinobu KATSUMATA
  • Patent number: 11231149
    Abstract: A light-emitting device includes: a substrate; a light-emitting element disposed on the substrate; a light-transmissive member disposed on a light extraction surface of the light-emitting element; and a cover that covers the light-emitting element with a gap between the cover and the light-emitting element, the cover including: an upper portion that is transmissive to light coming from the light-emitting element, a sidewall extending along a peripheral edge of the upper portion and having an outer lateral surface on which a projected portion is formed, and a recess defined by the upper portion and the sidewall. The projected portion is formed of a material that is deformable due to a pressing force generated in the event of an engagement with a counterpart member.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: January 25, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Tsuyoshi Okahisa, Tomohito Shinomiya, Daizo Kiba
  • Publication number: 20210231302
    Abstract: A light source device for irradiating two or more irradiation regions with light includes a plurality of light emitting parts, an optical lens, and a light converging member. The optical lens includes the first surface including a plurality of incident regions and the second surface including a plurality of emission regions. The light converging member includes a plurality of light entering portions and a plurality of light emission portions. The light converging member is located between the light emitting parts and the optical lens.
    Type: Application
    Filed: January 20, 2021
    Publication date: July 29, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Tsuyoshi OKAHISA, Norimasa YOSHIDA
  • Publication number: 20210231291
    Abstract: A light source device includes a plurality of light emitting parts, a first lens, and an optical lens. Each light emitting part is configured to emit light from the light emitting surface at a first full-width half-maximum and is configured to be individually turned on. The optical lens has a first surface including incident regions and a second surface including emission regions. A minimum distance between the first surface of the optical lens and the first lens is 0.1 mm or more and 1.0 mm or less. A light emitted from each of the light emitting parts enters the optical lens through the first lens, the light being emitted from the first lens at a second full-width half-maximum smaller than the first full-width half-maximum, such that lights emitted from two or more of the light emitting parts are irradiated to two or more corresponding irradiation regions.
    Type: Application
    Filed: January 20, 2021
    Publication date: July 29, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Norimasa YOSHIDA, Tsuyoshi OKAHISA
  • Publication number: 20210223666
    Abstract: A light-emitting device includes: a plurality of light-emitting elements arranged in an array on a base member; and a compound eye lens that comprises at least four Fresnel lenses disposed above the base member and facing the plurality of light-emitting elements. In a top plan view, a center of each of the plurality of light-emitting elements is offset from a lens center of the corresponding one of the Fresnel lenses of the compound eye lens in a direction toward a center of the compound eye lens. The plurality of light-emitting elements include at least two first light-emitting elements and at least two second light-emitting elements, wherein an emission color of the first light-emitting elements is different from an emission color of the second light-emitting elements.
    Type: Application
    Filed: April 2, 2021
    Publication date: July 22, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Tsuyoshi OKAHISA, Shinya MATSUOKA
  • Publication number: 20210199875
    Abstract: A light source device includes a substrate having an upper surface including mounting areas; light-emitting elements on the upper surface of the substrate in the mounting areas; a light-shielding member on an upper surface of at least one of the light-emitting elements; and a light guide member defining, in a lower surface, first recesses and at least one second recess. The light-emitting elements are disposed on the mounting areas in the first recesses. Light emitted from the light-emitting elements enters the light guide member through first inner surfaces defining the first recesses, is reflected at second inner surfaces defining the second recess toward the upper surface of the light guide member, is emitted from the upper surface of the light guide member, and illuminates illumination areas at positions that are point-symmetrical, with respect to a point above the substrate, to the mounting areas where the light-emitting elements are disposed.
    Type: Application
    Filed: December 17, 2020
    Publication date: July 1, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Tsuyoshi OKAHISA, Norimasa YOSHIDA
  • Patent number: 10983416
    Abstract: A light-emitting device includes: a plurality of light-emitting elements arranged in an array on a base member; and a compound eye lens that includes a plurality of lens parts disposed above the base member and facing the plurality of light-emitting elements. The plurality of light-emitting elements are arranged such that each of the plurality of light-emitting elements faces a corresponding one of the lens parts, and a center of each of the plurality of light-emitting elements is offset from a lens center of the corresponding one of the lens parts of the compound eye lens in a direction toward a center of the compound eye lens in a plan view. The plurality of light-emitting elements include first light-emitting elements and second light-emitting elements that are alternately arranged, wherein an emission color of the first light-emitting elements is different from an emission color of the second light-emitting elements.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: April 20, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Tsuyoshi Okahisa, Shinya Matsuoka
  • Publication number: 20210102683
    Abstract: A lens includes a cover part and a light-shielding part. The cover part includes a lens part, a connection part, and a flange part which are formed of a thermosetting first resin and continuous to one another. The light-shielding part covers an outer lateral side of the connection part and is formed of a second resin having a greater light-absorptance or a greater light-reflectance than the first resin.
    Type: Application
    Filed: November 30, 2020
    Publication date: April 8, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Tsuyoshi OKAHISA, Toshiyuki FUJII
  • Publication number: 20210091271
    Abstract: A light-emitting device includes: a substrate; a light-emitting element disposed on the substrate; a light-transmissive member disposed on a light extraction surface of the light-emitting element; a cover that covers the light-emitting element with a gap between the cover and the light-emitting element, the cover including: an upper portion that is transmissive to light emitted from the light-emitting element, a sidewall extending along a peripheral edge of the upper portion and having an outer lateral surface, and a recess defined by the upper portion and the sidewall; and a fixing member arranged on at least a part of the outer lateral surface of the sidewall of the cover. The fixing member is formed of a material that is deformable due to a pressing force generated in the event of an engagement with a counterpart member.
    Type: Application
    Filed: September 17, 2020
    Publication date: March 25, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Tsuyoshi OKAHISA, Tomohito SHINOMIYA, Daizo KIBA
  • Publication number: 20210088190
    Abstract: A light-emitting device includes: a substrate; a light-emitting element disposed on the substrate; a light-transmissive member disposed on a light extraction surface of the light-emitting element; and a cover that covers the light-emitting element with a gap between the cover and the light-emitting element, the cover including: an upper portion that is transmissive to light coming from the light-emitting element, a sidewall extending along a peripheral edge of the upper portion and having an outer lateral surface on which a projected portion is formed, and a recess defined by the upper portion and the sidewall. The projected portion is formed of a material that is deformable due to a pressing force generated in the event of an engagement with a counterpart member.
    Type: Application
    Filed: September 17, 2020
    Publication date: March 25, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Tsuyoshi OKAHISA, Tomohito SHINOMIYA, Daizo KIBA
  • Publication number: 20210013385
    Abstract: A method of manufacturing a covering member includes: providing a first light-reflective member comprising a through-hole, the through-hole having first and second openings; arranging a light-transmissive resin containing a wavelength-conversion material within the through-hole; distributing the wavelength-conversion material predominantly on a side of the first opening of the through-hole within the light-transmissive resin; and after the step of distributing the wavelength-conversion material, removing a portion of the light-transmissive resin from a side of the second opening of the through-hole.
    Type: Application
    Filed: September 28, 2020
    Publication date: January 14, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Tadao HAYASHI, Teruhito AZUMA, Suguru BEPPU, Kunihiro IZUNO, Tsuyoshi OKAHISA
  • Patent number: 10883700
    Abstract: A lens includes a cover part and a light-shielding part. The cover part includes a lens part, a connection part, and a flange part which are formed of a thermosetting first resin and continuous to one another. The light-shielding part covers an outer lateral side of the connection part and is formed of a second resin having a greater light-absorptance or a greater light-reflectance than the first resin.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: January 5, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Tsuyoshi Okahisa, Toshiyuki Fujii