Patents by Inventor Ken Onoda

Ken Onoda 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: 12032247
    Abstract: According to one embodiment, a liquid crystal display device includes a display panel including a red sub-pixel, a green sub-pixel and a blue sub-pixel and an illumination device including a red light-emitting element, a green light-emitting element and a blue light emitting element and irradiating a mixture of light emitted by the light emitting elements onto the display panel. Further, of the red sub-pixel, the green sub-pixel and the blue sub-pixel, an aperture area of a sub-pixel having a lowest wall plug efficiency of the light emitting element of a respective color is greater than aperture areas of the sub-pixels of other colors.
    Type: Grant
    Filed: May 19, 2022
    Date of Patent: July 9, 2024
    Assignee: Japan Display Inc.
    Inventors: Shinichi Komura, Koichi Okuda, Ken Onoda, Hiroaki Kijima
  • Patent number: 12025827
    Abstract: According to one embodiment, an illumination device includes a first light guide, a second light guide and a plurality of light sources. The first light guide includes a first main surface, a second main surface facing the first main surface, and a first side surface connected to the second light guide. The first side surface further includes a first connection surface and a second connection surface. The first connection surface extends from an end portion of the first main surface to the second main surface and obliquely extends so as to move away from the second side surface. The second connection surface perpendicularly extends from an end portion of the first connection surface to an end portion of the second main surface.
    Type: Grant
    Filed: June 16, 2023
    Date of Patent: July 2, 2024
    Assignee: JAPAN DISPLAY INC.
    Inventors: Koji Fujisawa, Ken Kagabu, Hiroaki Kijima, Ken Onoda
  • Patent number: 11953712
    Abstract: According to one embodiment, a display device includes a display panel, a first light guide, and a second light guide. In the first light guide, a first main surface includes a first plane and first grooves between the first plane and a first side surface, a second main surface includes second grooves orthogonal to the first grooves, and a second plane between the second grooves and the first side surface. In the second light guide, a third main surface includes a third plane and third grooves located between the third plane and a fourth side surface, a fourth main surface includes fourth grooves orthogonal to the third grooves, and a fourth plane located between the fourth grooves and the fourth side surface.
    Type: Grant
    Filed: May 9, 2023
    Date of Patent: April 9, 2024
    Assignee: JAPAN DISPLAY INC.
    Inventors: Ken Onoda, Shinichi Komura, Koichi Okuda, Hiroaki Kijima
  • Patent number: 11927787
    Abstract: According to one embodiment, an illumination device includes a first light guide having a first side surface, a second side surface located on a side opposite to the first side surface in a first direction, a first main surface, and a first opposed surface located on a side opposite to the first main surface in a second direction intersecting the first direction and a first light source opposed to the first side surface to emit first P-polarized light to the first side surface, the first side surface is inclined to the first main surface and the first opposed surface, the first light source is inclined to a first straight line perpendicular to the first side surface.
    Type: Grant
    Filed: November 16, 2022
    Date of Patent: March 12, 2024
    Assignee: JAPAN DISPLAY INC.
    Inventors: Hiroaki Kijima, Shinichi Komura, Koichi Okuda, Ken Onoda
  • Publication number: 20240045133
    Abstract: According to one embodiment, an illumination device, in which a plurality of light guides include a plurality of light guide pairs, each of the plurality of light guide pairs includes a first light guide and a second light guide, the plurality of light guide pairs are connected with their long sides opposed to each other, a plurality of laser light source elements include a plurality of first light source elements arranged to be opposed to a first side surface on a short side of the first light guide of the light guide pair, and a plurality of second light source elements arranged to be opposed to a second side surface of the second light guide of the light guide pair.
    Type: Application
    Filed: October 19, 2023
    Publication date: February 8, 2024
    Inventors: Koji FUJISAWA, Ken KAGABU, Hiroaki KIJIMA, Ken ONODA
  • Patent number: 11870211
    Abstract: According to one embodiment, an illumination device includes a light guide having a first plane, a second plane, a side plane, a first tilted plane, and a second tilted plane, an angle formed between the side plane and the first tilted plane and an angle formed between the side plane and the second tilted plane being acute angles, a first semiconductor laser element including a first light emitting part, and a second semiconductor laser element including a second light emitting part. The first light emitting part is opposed to a first intersection part of the side plane and the first tilted plane, and the second light emitting part is opposed to a second intersection part of the side plane and the second tilted plane.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: January 9, 2024
    Assignee: Japan Display Inc.
    Inventors: Shinichi Komura, Koichi Okuda, Ken Onoda, Hiroaki Kijima
  • Publication number: 20240004238
    Abstract: According to one embodiment, an illumination device includes red light emitting elements, green light emitting elements and blue light emitting elements opposing a first side surface of a first light guide, and the red light emitting elements, the green light emitting elements and the blue light emitting elements are disposed along the first side surface in a third direction that intersects the first direction and the second direction, and, arranged to be symmetrical with respect to a central axis of the third direction of the first side surface.
    Type: Application
    Filed: June 28, 2023
    Publication date: January 4, 2024
    Inventors: Masafumi OKADA, Shinichi KOMURA, Ken ONODA
  • Patent number: 11860402
    Abstract: According to one embodiment, an illumination device, in which a plurality of light guides include a plurality of light guide pairs, each of the plurality of light guide pairs includes a first light guide and a second light guide, the plurality of light guide pairs are connected with their long sides opposed to each other, a plurality of laser light source elements include a plurality of first light source elements arranged to be opposed to a first side surface on a short side of the first light guide of the light guide pair, and a plurality of second light source elements arranged to be opposed to a second side surface of the second light guide of the light guide pair.
    Type: Grant
    Filed: July 6, 2022
    Date of Patent: January 2, 2024
    Assignee: Japan Display Inc.
    Inventors: Koji Fujisawa, Ken Kagabu, Hiroaki Kijima, Ken Onoda
  • Publication number: 20230408751
    Abstract: According to one embodiment, an illumination device includes a first light guide, a second light guide and a plurality of light sources. The first light guide includes a first main surface, a second main surface facing the first main surface, and a first side surface connected to the second light guide. The first side surface further includes a first connection surface and a second connection surface. The first connection surface extends from an end portion of the first main surface to the second main surface and obliquely extends so as to move away from the second side surface. The second connection surface perpendicularly extends from an end portion of the first connection surface to an end portion of the second main surface.
    Type: Application
    Filed: June 16, 2023
    Publication date: December 21, 2023
    Applicant: Japan Display Inc.
    Inventors: Koji FUJISAWA, Ken KAGABU, Hiroaki KIJIMA, Ken ONODA
  • Publication number: 20230375776
    Abstract: According to one embodiment, an illumination device includes first and second light guides, first and second light sources, and first and second layers. The first light guide includes first and second main surfaces and first and second side surfaces. The second light guide includes third and fourth main surfaces and third and fourth side surfaces. The first light sources face a second side surface. The second light sources face the third side surface. The first layer includes first prisms in the second main surface. The second layer includes second prisms in the fourth main surface. The second and fourth side surfaces are displaced from each other in a first direction.
    Type: Application
    Filed: August 3, 2023
    Publication date: November 23, 2023
    Applicant: Japan Display Inc.
    Inventors: Hiroaki KIJIMA, Shinichi KOMURA, Ken ONODA, Koichi OKUDA
  • Patent number: 11808963
    Abstract: According to one embodiment, an illumination device includes a light guide including a first main surface, a second main surface, a first side surface, and a second side surface, a plurality of convex portions provided on the second main surface, and a first light source element and a second light source element opposing the first side surface and the second side surface, respectively, and when an incident angle of a main ray of the light propagating in the light guide is expressed by ?, a diffusion angle of the light is ?, an angle of the convex portion of the light guide is ?, a critical angle of the light guide is ?c, and an angle which satisfies (90°??c) is ?0, a relationship: ((?0+?)/3)<?<((?0??)/2) is satisfied.
    Type: Grant
    Filed: November 7, 2022
    Date of Patent: November 7, 2023
    Assignee: JAPAN DISPLAY INC.
    Inventors: Shinichi Komura, Koichi Okuda, Hiroaki Kijima, Ken Onoda
  • Patent number: 11796730
    Abstract: According to one embodiment, an illumination device includes a first light guide including a first main surface, a second main surface, a first side surface and a second side surface, a first light source and a first layer including a first prism provided on the second side surface. The first prism protrudes from the second main surface toward the opposite side to the first main surface and has a cross-sectional shape of a triangle with a first slope and a second slope. The incident angle of light emitted from the first light source and entering the first light guide from the second side surface, the angle between the first slope and the first direction, and the angle between the first slope and the second slope are set to values that satisfy the predetermined conditions, respectively.
    Type: Grant
    Filed: May 12, 2022
    Date of Patent: October 24, 2023
    Assignee: Japan Display Inc.
    Inventors: Hiroaki Kijima, Shinichi Komura, Koichi Okuda, Ken Onoda
  • Publication number: 20230333307
    Abstract: According to an embodiment, an illumination device includes a light guide having a first plane, a second plane opposed to the first plane and substantially parallel to the first plane, and a tilted plane opposed to the first plane and tilted to the first plane, the tilted plane and the second plane being arranged in a first direction, and a light emitting device including a first light emitting part, a second light emitting part, and a third light emitting part which are located directly below the tilted plane, arranged in the first direction, and configured to emit light having wavelengths different from each other.
    Type: Application
    Filed: June 21, 2023
    Publication date: October 19, 2023
    Applicant: Japan Display Inc.
    Inventors: Shinichi KOMURA, Koichi OKUDA, Ken ONODA, Hiroaki KIJIMA
  • Publication number: 20230280520
    Abstract: According to one embodiment, a display device includes a display panel, a first light guide, and a second light guide. In the first light guide, a first main surface includes a first plane and first grooves between the first plane and a first side surface, a second main surface includes second grooves orthogonal to the first grooves, and a second plane between the second grooves and the first side surface. In the second light guide, a third main surface includes a third plane and third grooves located between the third plane and a fourth side surface, a fourth main surface includes fourth grooves orthogonal to the third grooves, and a fourth plane located between the fourth grooves and the fourth side surface.
    Type: Application
    Filed: May 9, 2023
    Publication date: September 7, 2023
    Applicant: Japan Display Inc.
    Inventors: Ken ONODA, Shinichi KOMURA, Koichi OKUDA, Hiroaki KIJIMA
  • Patent number: 11726253
    Abstract: According to an embodiment, an illumination device includes a light guide having a first plane, a second plane opposed to the first plane and substantially parallel to the first plane, and a tilted plane opposed to the first plane and tilted to the first plane, the tilted plane and the second plane being arranged in a first direction, and a light emitting device including a first light emitting part, a second light emitting part, and a third light emitting part which are located directly below the tilted plane, arranged in the first direction, and configured to emit light having wavelengths different from each other.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: August 15, 2023
    Assignee: Japan Display Inc.
    Inventors: Shinichi Komura, Koichi Okuda, Ken Onoda, Hiroaki Kijima
  • Patent number: 11693171
    Abstract: According to one embodiment, a display device includes a display panel, a first light guide, and a second light guide. In the first light guide, a first main surface includes a first plane and first grooves between the first plane and a first side surface, a second main surface includes second grooves orthogonal to the first grooves, and a second plane between the second grooves and the first side surface. In the second light guide, a third main surface includes a third plane and third grooves located between the third plane and a fourth side surface, a fourth main surface includes fourth grooves orthogonal to the third grooves, and a fourth plane located between the fourth grooves and the fourth side surface.
    Type: Grant
    Filed: October 21, 2022
    Date of Patent: July 4, 2023
    Assignee: JAPAN DISPLAY INC.
    Inventors: Ken Onoda, Shinichi Komura, Koichi Okuda, Hiroaki Kijima
  • Publication number: 20230185007
    Abstract: According to one embodiment, a lens portion includes a first lens element converging while converting first circularly polarized light into second circularly polarized light and a second lens element converging while converting the second circularly polarized light into the first circularly polarized light. Each of the first lens element and the second lens element includes first liquid crystal molecules, and the alignment direction of the first liquid crystal molecules of the first lens element is line symmetry with the alignment direction of the first liquid crystal molecules of the second lens element.
    Type: Application
    Filed: December 2, 2022
    Publication date: June 15, 2023
    Applicant: Japan Display Inc.
    Inventors: Shinichi KOMURA, Koichi OKUDA, Ken ONODA, Hiroaki KIJIMA
  • Publication number: 20230152630
    Abstract: According to one embodiment, an illumination device includes a first light guide having a first side surface, a second side surface located on a side opposite to the first side surface in a first direction, a first main surface, and a first opposed surface located on a side opposite to the first main surface in a second direction intersecting the first direction and a first light source opposed to the first side surface to emit first P-polarized light to the first side surface, the first side surface is inclined to the first main surface and the first opposed surface, the first light source is inclined to a first straight line perpendicular to the first side surface.
    Type: Application
    Filed: November 16, 2022
    Publication date: May 18, 2023
    Applicant: Japan Display Inc.
    Inventors: Hiroaki KIJIMA, Shinichi KOMURA, Koichi OKUDA, Ken ONODA
  • Publication number: 20230144819
    Abstract: According to one embodiment, an illumination device includes a light guide including a first main surface, a second main surface, a first side surface, and a second side surface, a plurality of convex portions provided on the second main surface, and a first light source element and a second light source element opposing the first side surface and the second side surface, respectively, and when an incident angle of a main ray of the light propagating in the light guide is expressed by ?, a diffusion angle of the light is ?, an angle of the convex portion of the light guide is ?, a critical angle of the light guide is ?c, and an angle which satisfies (90°??c) is ?0, a relationship: ((?0+?)/3)<?<((?0??)/2) is satisfied.
    Type: Application
    Filed: November 7, 2022
    Publication date: May 11, 2023
    Applicant: Japan Display Inc.
    Inventors: Shinichi KOMURA, Koichi OKUDA, Ken ONODA, Hiroaki KIJIMA
  • Publication number: 20230125438
    Abstract: According to one embodiment, a display device includes a display panel, a first light guide, and a second light guide. In the first light guide, a first main surface includes a first plane and first grooves between the first plane and a first side surface, a second main surface includes second grooves orthogonal to the first grooves, and a second plane between the second grooves and the first side surface. In the second light guide, a third main surface includes a third plane and third grooves located between the third plane and a fourth side surface, a fourth main surface includes fourth grooves orthogonal to the third grooves, and a fourth plane located between the fourth grooves and the fourth side surface.
    Type: Application
    Filed: October 21, 2022
    Publication date: April 27, 2023
    Applicant: Japan Display Inc.
    Inventors: Ken ONODA, Shinichi KOMURA, Koichi OKUDA, Hiroaki KIJIMA