Patents by Inventor Tetsuo Shimizu

Tetsuo Shimizu 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: 20210294192
    Abstract: A wavelength conversion element according to the present disclosure includes a substrate, a reflecting layer, a wavelength conversion layer which is disposed on the reflecting layer, and which is configured to convert light in a first wavelength band into light in a second wavelength band, a structure which is disposed on the wavelength conversion layer, and which is configured to scatter the light in the first wavelength band, and an optical layer which is disposed on the structure, and which is configured to reflect a part of the light in the first wavelength band, transmit another part of the light in the first wavelength band, and transmit the light in the second wavelength band, wherein the optical layer is different in reflectance with respect to the light in the first wavelength band in accordance with an incidence angle of the light in the first wavelength band entering the optical layer.
    Type: Application
    Filed: March 22, 2021
    Publication date: September 23, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Koya SHIRATORI, Mizuha HIROKI, Ryuta KOIZUMI, Tetsuo SHIMIZU
  • Publication number: 20210297641
    Abstract: The wavelength conversion element according to the present disclosure includes a wavelength conversion layer which has a first surface and a second surface different from the first surface, and which includes a scattering element no higher than 5% in volume ratio, and which is configured to convert light in a first wavelength band into light in a second wavelength band different from the first wavelength band, and a plurality of protruding parts which is disposed so as to be opposed to the first surface, and which includes a first protruding part and a second protruding part adjacent to each other. A height of the plurality of protruding parts is no smaller than 1 ?m, and a distance between a vertex of the first protruding part and a vertex of the second protruding part in a direction along the first surface is no smaller than 3 ?m.
    Type: Application
    Filed: March 17, 2021
    Publication date: September 23, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Shinichi Yotsuya, Tetsuo Shimizu, Ryuta Koizumi, Mizuha Hiroki
  • Publication number: 20210284535
    Abstract: An aluminum nitride film includes a polycrystalline aluminum nitride. A withstand voltage of the aluminum nitride film is 100 kV/mm or more.
    Type: Application
    Filed: June 1, 2021
    Publication date: September 16, 2021
    Applicants: SHIBAURA INSTITUTE OF TECHNOLOGY, TOSHIBA MATERIALS CO., LTD.
    Inventors: Atsushi YUMOTO, Mari SHIMIZU, Tetsuo INOUE, Takashi HINO, Shuichi SAITO
  • Publication number: 20210242618
    Abstract: An electrical connection component includes a connecting part that is electrically conductive, and an electrical contact on at least a part of a surface of the connecting part, the electrical contact including a graphene oxide film. The graphene oxide film is graphene oxide or a stack of graphene oxide, and a thickness of the graphene oxide film is 1 nm or more and 50 nm or less. The electrical connection component may be either a male terminal or a female terminal.
    Type: Application
    Filed: February 2, 2021
    Publication date: August 5, 2021
    Applicant: Yazaki Corporation
    Inventors: Nan YE, Toshitaka KUBO, Tetsuo SHIMIZU
  • Publication number: 20210234295
    Abstract: A connector pair includes a first connector, and a second connector electrically connected to the first connector. The first connector includes a first electrical contact part provided with a graphene film on a metal base material. The second connector includes a second electrical contact part electrically connected to the first connector via the graphene film. A contact area between the first electrical contact part and the second electrical contact part is smaller than an area of the graphene film coating the metal base material.
    Type: Application
    Filed: January 26, 2021
    Publication date: July 29, 2021
    Inventors: Toshitaka Kubo, Kazuhiko Seki, Mitsuhiro Okada, Kazuto Hatakeyama, Kenji Koga, Tetsuo Shimizu, Nan Ye, Hiroki Kawai
  • Publication number: 20210135386
    Abstract: The invention relates to a connector including an electrical contact material which contains a metal base material and a conductive coating layer on a surface of the metal base material, in which the conductive coating layer includes: a matrix phase constituted by a metal other than gold; and a second phase that includes: elongated portions that elongate in a depth direction from a surface of the matrix phase; and enlarged diameter portions that, in the surface of the matrix phase, extend from the elongated portions along the surface, in which the second phase is constituted by gold or a non-metal conductive material that is less oxidizable than the metal constituting the matrix phase.
    Type: Application
    Filed: October 29, 2020
    Publication date: May 6, 2021
    Inventors: Toshitaka Kubo, Mitsuhiro Okada, Tetsuo Shimizu, Hiroki Kawai
  • Patent number: 10884330
    Abstract: A light source apparatus according to an aspect of the present disclosure includes a substrate having a first surface, a frame, a lid with which the frame is provided, a light emitter that is accommodated in an accommodation space, a wavelength converter that is provided at the substrate, is accommodated in the accommodation space, converts first light emitted from the light emitter into second light having a wavelength different from the wavelength of the first light, and outputs the second light, and a first optical film that is provided in the light path between the light emitter and the wavelength converter, transmits one of the first light and the second light, and reflects the other one of the first light and the second light, and the light emitter emits the first light in such a way that the chief ray of the first light travels along the first surface.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: January 5, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tetsuo Shimizu, Wataru Yasumatsu
  • Patent number: 10859899
    Abstract: A wavelength conversion element includes a wavelength conversion layer which has a first face on which an excitation light is incident and a second face facing the first face, a first layer which is provided facing the second face and contains a first inorganic oxide, a second layer which is provided facing the first layer and contains a first metal or a second inorganic oxide that is different from the first inorganic oxide, and a third layer which is provided facing the second layer, contains either silver or aluminum, and reflects the excitation light or a light obtained by wavelength conversion of the excitation light by the wavelength conversion layer.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: December 8, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kunihiko Takagi, Kunihiko Yano, Tomohiro Yokoo, Wataru Yasumatsu, Tetsuo Shimizu, Shinichi Yotsuya, Koya Shiratori
  • Patent number: 10824064
    Abstract: A light source device according to the present disclosure includes a substrate having a first surface, a plurality of light emitting elements disposed on the first surface side of the substrate, a frame body which is disposed so as to surround the plurality of light emitting elements, and which is bonded on the first surface side of the substrate, and a lid body which has a light transmissive member, which is disposed so as to be opposed to the first surface of the substrate, and which is bonded on an opposite side of the frame body to the substrate. At least one of a first bonding section with which the substrate and the frame body are bonded to each other, and a second bonding section with which the frame body and the lid body are bonded to each other includes an organic adhesive.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: November 3, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tetsuo Shimizu, Akira Egawa, Hidemitsu Sorimachi
  • Patent number: 10795248
    Abstract: A light source device according to the present disclosure includes a substrate having a first surface, a plurality of light emitting elements disposed on the first surface side of the substrate, a frame body which is disposed so as to surround the plurality of light emitting elements, and which is bonded on the first surface side of the substrate, and a lid body which has a light transmissive member configured to transmit light emitted from the plurality of light emitting elements, which is disposed so as to be opposed to the first surface of the substrate, and which is bonded on an opposite side of the frame body to the substrate. The plurality of light emitting elements is housed in a housing space, the housing space being formed by the substrate, the frame body and the lid body. The frame body is formed of a material including a nonconductive material.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: October 6, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tetsuo Shimizu, Akira Egawa, Hidemitsu Sorimachi
  • Patent number: 10705416
    Abstract: A wavelength conversion element according to an aspect of the invention includes a first wavelength conversion layer that has a first light incident surface on which excitation light is incident and a first light exiting surface facing away from the first light incident surface and emits first fluorescence, a second wavelength conversion layer that has a second light incident surface on which at least the first fluorescence is incident and emits second fluorescence, and a substrate that has a first surface and a second surface facing away from the first surface and includes a light transmitting portion that transmits at least the first fluorescence. The first wavelength conversion layer is so provided that the first light exiting surface faces the first surface of the substrate, and the second wavelength conversion layer is so provided that the second light incident surface faces the second surface of the substrate.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: July 7, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tetsuo Shimizu, Akira Egawa
  • Patent number: 10670952
    Abstract: A wavelength converter to which the invention is applied includes a phosphor that converts the wavelength of blue light to emit fluorescence, a rotating mechanism that rotates the phosphor around an axis of rotation that extends in a light incident direction in which the blue light is incident, and a heat insulating member that is provided between the phosphor and the rotating mechanism in the light incident direction. The phosphor has a coinciding section that coincides with the rotating mechanism when viewed in the light incident direction.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: June 2, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tetsuo Shimizu, Akira Egawa
  • Publication number: 20200064721
    Abstract: A light source apparatus according to an aspect of the present disclosure includes a substrate having a first surface, a frame, a lid with which the frame is provided, a light emitter that is accommodated in an accommodation space, a wavelength converter that is provided at the substrate, is accommodated in the accommodation space, converts first light emitted from the light emitter into second light having a wavelength different from the wavelength of the first light, and outputs the second light, and a first optical film that is provided in the light path between the light emitter and the wavelength converter, transmits one of the first light and the second light, and reflects the other one of the first light and the second light, and the light emitter emits the first light in such a way that the chief ray of the first light travels along the first surface.
    Type: Application
    Filed: August 22, 2019
    Publication date: February 27, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tetsuo SHIMIZU, Wataru Yasumatsu
  • Patent number: 10520745
    Abstract: A wavelength conversion element includes a wavelength conversion layer having a first surface which excitation light enters, and a second surface opposed to the first surface, and adapted to perform wavelength conversion on the excitation light, a substrate disposed so as to be opposed to the second surface, and a bonding layer adapted to bond the wavelength conversion layer and the substrate to each other, and the bonding layer has a first bonding material disposed in a first region opposed to an incident area of the excitation light in the second surface, and a second bonding material disposed in at least a second region located on an outer periphery of the first region and lower in Young's modulus than the first bonding material.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: December 31, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kunihiko Takagi, Tetsuo Shimizu
  • Publication number: 20190361329
    Abstract: A light source device according to the present disclosure includes a substrate having a first surface, a plurality of light emitting elements disposed on the first surface side of the substrate, a frame body which is disposed so as to surround the plurality of light emitting elements, and which is bonded on the first surface side of the substrate, and a lid body which has a light transmissive member configured to transmit light emitted from the plurality of light emitting elements, which is disposed so as to be opposed to the first surface of the substrate, and which is bonded on an opposite side of the frame body to the substrate. The plurality of light emitting elements is housed in a housing space, the housing space being formed by the substrate, the frame body and the lid body, and the light transmissive member is formed of a material including resin.
    Type: Application
    Filed: May 22, 2019
    Publication date: November 28, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tetsuo SHIMIZU, Akira EGAWA, Hidemitsu SORIMACHI
  • Publication number: 20190324361
    Abstract: A light source device according to the present disclosure includes a substrate having a first surface, a plurality of light emitting elements disposed on the first surface side of the substrate, a frame body which is disposed so as to surround the plurality of light emitting elements, and which is bonded on the first surface side of the substrate, and a lid body which has a light transmissive member, which is disposed so as to be opposed to the first surface of the substrate, and which is bonded on an opposite side of the frame body to the substrate. At least one of a first bonding section with which the substrate and the frame body are bonded to each other, and a second bonding section with which the frame body and the lid body are bonded to each other includes an organic adhesive.
    Type: Application
    Filed: April 22, 2019
    Publication date: October 24, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tetsuo SHIMIZU, Akira EGAWA, Hidemitsu SORIMACHI
  • Publication number: 20190324360
    Abstract: A light source device according to the present disclosure includes a substrate having a first surface, a plurality of light emitting elements disposed on the first surface side of the substrate, a frame body which is disposed so as to surround the plurality of light emitting elements, and which is bonded on the first surface side of the substrate, and a lid body which has a light transmissive member configured to transmit light emitted from the plurality of light emitting elements, which is disposed so as to be opposed to the first surface of the substrate, and which is bonded on an opposite side of the frame body to the substrate. The plurality of light emitting elements is housed in a housing space, the housing space being formed by the substrate, the frame body and the lid body. The frame body is formed of a material including resin.
    Type: Application
    Filed: April 22, 2019
    Publication date: October 24, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tetsuo SHIMIZU, Akira EGAWA, Hidemitsu SORIMACHI
  • Publication number: 20190324359
    Abstract: A light source device according to the present disclosure includes a substrate having a first surface, a plurality of light emitting elements disposed on the first surface side of the substrate, a frame body which is disposed so as to surround the plurality of light emitting elements, and which is bonded on the first surface side of the substrate, and a lid body which has a light transmissive member configured to transmit light emitted from the plurality of light emitting elements, which is disposed so as to be opposed to the first surface of the substrate, and which is bonded on an opposite side of the frame body to the substrate. The plurality of light emitting elements is housed in a housing space, the housing space being formed by the substrate, the frame body and the lid body. The frame body is formed of a material including a nonconductive material.
    Type: Application
    Filed: April 22, 2019
    Publication date: October 24, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tetsuo SHIMIZU, Akira EGAWA, Hidemitsu SORIMACHI
  • Publication number: 20190302592
    Abstract: A wavelength converter to which the invention is applied includes a phosphor that converts the wavelength of blue light to emit fluorescence, a rotating mechanism that rotates the phosphor around an axis of rotation that extends in a light incident direction in which the blue light is incident, and a heat insulating member that is provided between the phosphor and the rotating mechanism in the light incident direction. The phosphor has a coinciding section that coincides with the rotating mechanism when viewed in the light incident direction.
    Type: Application
    Filed: March 27, 2019
    Publication date: October 3, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tetsuo SHIMIZU, Akira EGAWA
  • Publication number: 20190302587
    Abstract: A wavelength conversion element according to an aspect of the invention includes a first wavelength conversion layer that has a first light incident surface on which excitation light is incident and a first light exiting surface facing away from the first light incident surface and emits first fluorescence, a second wavelength conversion layer that has a second light incident surface on which at least the first fluorescence is incident and emits second fluorescence, and a substrate that has a first surface and a second surface facing away from the first surface and includes a light transmitting portion that transmits at least the first fluorescence. The first wavelength conversion layer is so provided that the first light exiting surface faces the first surface of the substrate, and the second wavelength conversion layer is so provided that the second light incident surface faces the second surface of the substrate.
    Type: Application
    Filed: March 26, 2019
    Publication date: October 3, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tetsuo SHIMIZU, Akira EGAWA