Patents by Inventor Yudai Numata

Yudai Numata 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: 11275284
    Abstract: According to one embodiment, a display device includes a first substrate including a first transparent substrate, a wiring portion, and a pixel electrode, a second substrate including a second transparent substrate, a common electrode opposed to the pixel electrode, a light-shielding layer overlapping the wiring portion between the second transparent substrate and the common electrode, and a transparent layer disposed between the second transparent substrate and the light-shielding layer, a liquid crystal layer including a stripe-shaped polymer and liquid crystal molecules, and light-emitting elements. A refractive index of the transparent layer is less than a refractive index of the second transparent substrate.
    Type: Grant
    Filed: April 15, 2021
    Date of Patent: March 15, 2022
    Assignee: Japan Display Inc.
    Inventors: Yudai Numata, Kentaro Okuyama, Kojiro Ikeda
  • Patent number: 11269227
    Abstract: According to one embodiment, a display device includes a first substrate, a second substrate and a liquid crystal layer. The first substrate includes a first insulating substrate, a scanning line, a signal line, a switching, and a pixel electrode. The liquid crystal layer includes a polymer in a shape of a streak and a liquid crystal molecule. The scanning line includes a conductive layer located between the first insulating substrate and the liquid crystal layer, and a first reflective layer located between the first insulating substrate and the conductive layer and having a reflectance higher than a reflectance of the conductive layer.
    Type: Grant
    Filed: February 19, 2021
    Date of Patent: March 8, 2022
    Assignee: Japan Display Inc.
    Inventors: Kentaro Okuyama, Yudai Numata
  • Patent number: 11237422
    Abstract: According to one embodiment, a display device includes a display panel, a light emitting element, a light guide layer and a first optical layer. The display panel includes a first substrate, a second substrate opposed to the first substrate, and a polymer dispersed liquid crystal layer which is held between the first substrate and the second substrate and contains a polymer and a liquid crystal molecule. The light guide layer has a first surface opposed to the display panel, and an edge opposed to the light emitting element. The first optical layer is located between the display panel and the light guide layer. A refractive index of the first optical layer is lower than a refractive index of the light guide layer.
    Type: Grant
    Filed: October 15, 2020
    Date of Patent: February 1, 2022
    Assignee: Japan Display Inc.
    Inventors: Yudai Numata, Kentaro Okuyama
  • Publication number: 20220026750
    Abstract: According to one embodiment, a display device includes a first substrate, a second substrate including a first end portion and a second end portion located at a position different from the first end portion, a polymer dispersed liquid crystal layer disposed between the first substrate and the second substrate, a light source device located above the first substrate and disposed along the first end portion, and a light-shielding member disposed on at least a part of the second end portion.
    Type: Application
    Filed: October 6, 2021
    Publication date: January 27, 2022
    Applicant: Japan Display Inc.
    Inventors: Yudai NUMATA, Kentaro OKUYAMA
  • Patent number: 11187932
    Abstract: According to one embodiment, a display device includes a first substrate, a second substrate including a first end portion and a second end portion located at a position different from the first end portion, a polymer dispersed liquid crystal layer disposed between the first substrate and the second substrate, a light source device located above the first substrate and disposed along the first end portion, and a light-shielding member disposed on at least a part of the second end portion.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: November 30, 2021
    Assignee: Japan Display Inc.
    Inventors: Yudai Numata, Kentaro Okuyama
  • Patent number: 11181784
    Abstract: According to one embodiment, a display device including a first substrate having a first end portion, a second substrate facing the first substrate and having a second end portion separated from the first end portion, a liquid crystal layer located between the first substrate and the second substrate, a light-emitting element facing the second end portion, a first sealing member bonding the first substrate and the second substrate together, and a low refractive area located between the first substrate and the second substrate, located between the second end portion and the first sealing member in planar view, and containing a material having a refractive index lower than that of the second substrate.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: November 23, 2021
    Assignee: Japan Display Inc.
    Inventors: Kentaro Okuyama, Hiroki Sugiyama, Yoshihide Ohue, Yudai Numata
  • Publication number: 20210311243
    Abstract: According to one embodiment, a display device includes a first transparent substrate, a second transparent substrate, a liquid crystal layer, light-emitting elements disposed in a first direction, a third transparent substrate including a main surface and a side surface opposed to the light-emitting elements, and a transparent layer disposed on the main surface and having a lower refractive index than the third transparent substrate. The third transparent substrate is bonded to the first transparent substrate or the second transparent substrate with the transparent layer sandwiched in between. The transparent layer includes strip portions disposed in the first direction and extended along a second direction.
    Type: Application
    Filed: June 18, 2021
    Publication date: October 7, 2021
    Applicant: Japan Display Inc.
    Inventors: Yudai NUMATA, Kentaro OKUYAMA
  • Publication number: 20210263208
    Abstract: According to one embodiment, a display device includes a first substrate, a second substrate opposed to the first substrate and including an end portion, a liquid crystal layer provided between the first substrate and the second substrate and including a polymer in a shape of a streak and a liquid crystal molecule, a light-emitting element having a light emitting portion opposed to the end portion, and a light guide located between the end portion and the light emitting portion.
    Type: Application
    Filed: May 11, 2021
    Publication date: August 26, 2021
    Applicant: Japan Display Inc.
    Inventors: Kentaro OKUYAMA, Yudai NUMATA
  • Publication number: 20210232010
    Abstract: According to one embodiment, a display device includes a first substrate including a first transparent substrate, a wiring portion, and a pixel electrode, a second substrate including a second transparent substrate, a common electrode opposed to the pixel electrode, a light-shielding layer overlapping the wiring portion between the second transparent substrate and the common electrode, and a transparent layer disposed between the second transparent substrate and the light-shielding layer, a liquid crystal layer including a stripe-shaped polymer and liquid crystal molecules, and light-emitting elements. A refractive index of the transparent layer is less than a refractive index of the second transparent substrate.
    Type: Application
    Filed: April 15, 2021
    Publication date: July 29, 2021
    Applicant: Japan Display Inc.
    Inventors: Yudai NUMATA, Kentaro OKUYAMA, Kojiro IKEDA
  • Patent number: 11073652
    Abstract: According to one embodiment, a display device includes a first transparent substrate, a second transparent substrate, a liquid crystal layer, light-emitting elements disposed in a first direction, a third transparent substrate including a main surface and a side surface opposed to the light-emitting elements, and a transparent layer disposed on the main surface and having a lower refractive index than the third transparent substrate. The third transparent substrate is bonded to the first transparent substrate or the second transparent substrate with the transparent layer sandwiched in between. The transparent layer includes strip portions disposed in the first direction and extended along a second direction.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: July 27, 2021
    Assignee: Japan Display Inc.
    Inventors: Yudai Numata, Kentaro Okuyama
  • Publication number: 20210223465
    Abstract: According to one embodiment, a display device includes a first transparent substrate including a first main surface, a second transparent substrate including a first end portion, a liquid crystal layer containing strip-shaped polymers and liquid crystal molecules, a third transparent substrate including a second end portion and a second main surface, a first light-emitting element and a first light guide. The first light guide includes a first surface and a second surface. A height from the first main surface to the second surface is less than a height from the first main surface to the second main surface.
    Type: Application
    Filed: April 5, 2021
    Publication date: July 22, 2021
    Applicant: Japan Display Inc.
    Inventors: Yudai NUMATA, Kentaro OKUYAMA
  • Publication number: 20210223608
    Abstract: According to one embodiment, a display device includes a display panel including a first substrate including a first transparent substrate having a first main surface, a first opposite and a side surface, a second substrate including a second transparent substrate having a second main surface and a second opposite surface, and a liquid crystal layer located between the first substrate and the second substrate, a light emitting element opposed to the side surface, a third transparent substrate, and a transparent layer located between the display panel and the third transparent substrate and having a second refractive index that is lower than a first refractive index.
    Type: Application
    Filed: April 5, 2021
    Publication date: July 22, 2021
    Applicant: Japan Display Inc.
    Inventor: Yudai NUMATA
  • Patent number: 11067818
    Abstract: According to one embodiment, display device includes an optical member including a first main surface, and a second main surface on a side opposite to the first main surface, the optical member configured to form an image on a side of the second main surface with light incident from the first main surface, a reflective member including a reflective surface opposed to the first main surface, and a display portion located between the optical member and the reflective member, wherein the reflective member is arranged parallel to the optical member.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: July 20, 2021
    Assignee: Japan Display Inc.
    Inventors: Yudai Numata, Takeo Koito
  • Publication number: 20210200046
    Abstract: According to one embodiment, a display device includes a first substrate, a second substrate and a liquid crystal layer. The first substrate includes a first insulating substrate, a scanning line, a signal line, a switching, and a pixel electrode. The liquid crystal layer includes a polymer in a shape of a streak and a liquid crystal molecule. The scanning line includes a conductive layer located between the first insulating substrate and the liquid crystal layer, and a first reflective layer located between the first insulating substrate and the conductive layer and having a reflectance higher than a reflectance of the conductive layer.
    Type: Application
    Filed: February 19, 2021
    Publication date: July 1, 2021
    Applicant: Japan Display Inc.
    Inventors: Kentaro OKUYAMA, Yudai NUMATA
  • Patent number: 11035995
    Abstract: According to one embodiment, a display device includes a first substrate, a second substrate opposed to the first substrate and including an end portion, a liquid crystal layer provided between the first substrate and the second substrate and including a polymer in a shape of a streak and a liquid crystal molecule, a light-emitting element having a light emitting portion opposed to the end portion, and a light guide located between the end portion and the light emitting portion.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: June 15, 2021
    Assignee: Japan Display Inc.
    Inventors: Kentaro Okuyama, Yudai Numata
  • Patent number: 11022832
    Abstract: According to one embodiment, a display device includes a first light guide including a first main surface, a second main surface, a first end portion opposed to light-emitting elements, and a second end portion, a first layer which is arranged to be in contact with the first main surface, and a second layer which is arranged to be in contact with the first main surface, and is located between the first layer and the second end portion, wherein the first light guide has a first refractive index, the first layer has a second refractive index lower than the first refractive index, the second layer has a third refractive index higher than the second refractive index, and the first layer is located at a position closer to the first end portion than the second layer.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: June 1, 2021
    Assignee: Japan Display Inc.
    Inventors: Yudai Numata, Kentaro Okuyama
  • Publication number: 20210132433
    Abstract: According to one embodiment, a display device includes, a first transparent substrate having a side surface and a main surface, a first alignment film disposed along the main surface, a first transparent layer located between the first transparent substrate and the first alignment film, a second transparent substrate, a pixel electrode electrically connected to a switching element, a liquid crystal layer, and a light-emitting element opposed to the side surface. The first transparent layer overlaps a part of the pixel electrode and has a lower refractive index than the first transparent substrate.
    Type: Application
    Filed: January 13, 2021
    Publication date: May 6, 2021
    Applicant: Japan Display Inc.
    Inventor: Yudai NUMATA
  • Publication number: 20210132279
    Abstract: According to one embodiment, a display device includes a first transparent substrate, a second transparent substrate, a liquid crystal layer, light-emitting elements disposed in a first direction, a third transparent substrate including a main surface and a side surface opposed to the light-emitting elements, and a transparent layer disposed on the main surface and having a lower refractive index than the third transparent substrate. The third transparent substrate is bonded to the first transparent substrate or the second transparent substrate with the transparent layer sandwiched in between. The transparent layer includes strip portions disposed in the first direction and extended along a second direction.
    Type: Application
    Filed: January 13, 2021
    Publication date: May 6, 2021
    Applicant: Japan Display Inc.
    Inventors: Yudai NUMATA, Kentaro OKUYAMA
  • Patent number: 10955714
    Abstract: According to one embodiment, a display device includes a first substrate, a second substrate and a liquid crystal layer. The first substrate includes a first insulating substrate, a scanning line, a signal line, a switching, and a pixel electrode. The liquid crystal layer includes a polymer in a shape of a streak and a liquid crystal molecule. The scanning line includes a conductive layer located between the first insulating substrate and the liquid crystal layer, and a first reflective layer located between the first insulating substrate and the conductive layer and having a reflectance higher than a reflectance of the conductive layer.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: March 23, 2021
    Assignee: Japan Display Inc.
    Inventors: Kentaro Okuyama, Yudai Numata
  • Publication number: 20210026171
    Abstract: According to one embodiment, a display device includes a display panel, a light emitting element, a light guide layer and a first optical layer. The display panel includes a first substrate, a second substrate opposed to the first substrate, and a polymer dispersed liquid crystal layer which is held between the first substrate and the second substrate and contains a polymer and a liquid crystal molecule. The light guide layer has a first surface opposed to the display panel, and an edge opposed to the light emitting element. The first optical layer is located between the display panel and the light guide layer. A refractive index of the first optical layer is lower than a refractive index of the light guide layer.
    Type: Application
    Filed: October 15, 2020
    Publication date: January 28, 2021
    Applicant: Japan Display Inc.
    Inventors: Yudai NUMATA, Kentaro OKUYAMA