Patents by Inventor Naoki Tokuda

Naoki Tokuda 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: 20240130165
    Abstract: According to one embodiment, a display device includes a plurality of display elements and a partition which surrounds each of the plurality of display elements. The display elements each include a lower electrode, an upper electrode opposing the lower electrode and an organic layer disposed between the lower electrode and the upper electrode. The partition includes a conductive lower portion and an upper portion protruding from a side surface of the lower portion. Further, the partition includes an aperture through which the lower portion and the upper portion penetrate.
    Type: Application
    Filed: October 10, 2023
    Publication date: April 18, 2024
    Applicant: Japan Display Inc.
    Inventors: Hidekazu MIYAKE, Naoki TOKUDA
  • Publication number: 20240116274
    Abstract: An inorganic substrate/polymer film laminate with an attached protective film that allows for easy individual removal even when stored in a stacked state for a long period of time is provided. A first laminate is characterized by including an inorganic substrate, a polymer film layer and a first protective film, in that order, wherein the surface roughness Ra of the surface of the inorganic substrate opposite of the polymer film layer is 0.02-1.2 ?m.
    Type: Application
    Filed: February 22, 2022
    Publication date: April 11, 2024
    Applicant: TOYOBO CO., LTD.
    Inventors: Kaya TOKUDA, Satoshi MAEDA, Tetsuo OKUYAMA, Naoki WATANABE
  • Publication number: 20240040901
    Abstract: According to an embodiment, a display device includes a substrate, a lower electrode above the substrate in a display area, a rib including an aperture overlapping the lower electrode, a partition provided on the rib in the display area, a thin film including an upper electrode and an organic layer, a first sealing layer formed of an inorganic material and covering the thin film and the partition, and a line provided in a surrounding area between an end portion of the substrate and the display area. Each of the partition and the line includes a conductive lower portion and an upper portion protruding from a side surface of the lower portion.
    Type: Application
    Filed: July 26, 2023
    Publication date: February 1, 2024
    Applicant: Japan Display Inc.
    Inventors: Jun HANARI, Naoki TOKUDA
  • Patent number: 11810925
    Abstract: A display device includes a plurality of pixels, first to nth scanning lines, and a first semiconductor film. The plurality of pixels is arranged in first to nth rows and first to mth columns. The first to nth scanning lines are electrically connected to the pixels in the respective first to nth rows. The first semiconductor film overlaps with at least one of first to kth scanning lines. A display region has a cutoff intersecting the first to nth rows, and the first semiconductor film is located in the cutoff. Each of the plurality of pixels includes a light-emitting element (OLED) and a transistor electrically connected to the OLED and having a second semiconductor film. The first semiconductor film and the second semiconductor film exist in the same layer. n and m are each a natural number larger than 1, and k is a natural number smaller than n.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: November 7, 2023
    Assignee: Japan Display Inc.
    Inventor: Naoki Tokuda
  • Patent number: 11765951
    Abstract: A display device according to an embodiment of the present invention includes: a base material including a display region and a curved region; a wiring line disposed on the base material and disposed from the display region over the curved region; and a heat dissipating layer formed corresponding to a position at which the wiring line is disposed in the curved region.
    Type: Grant
    Filed: October 7, 2021
    Date of Patent: September 19, 2023
    Assignee: Japan Display Inc.
    Inventor: Naoki Tokuda
  • Publication number: 20230056257
    Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.
    Type: Application
    Filed: October 7, 2022
    Publication date: February 23, 2023
    Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
  • Patent number: 11468836
    Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.
    Type: Grant
    Filed: September 4, 2020
    Date of Patent: October 11, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
  • Publication number: 20220028959
    Abstract: A display device according to an embodiment of the present invention includes: a base material including a display region and a curved region; a wiring line disposed on the base material and disposed from the display region over the curved region; and a heat dissipating layer formed corresponding to a position at which the wiring line is disposed in the curved region.
    Type: Application
    Filed: October 7, 2021
    Publication date: January 27, 2022
    Applicant: Japan Display Inc.
    Inventor: Naoki TOKUDA
  • Publication number: 20220013546
    Abstract: A display device includes a plurality of pixels, first to nth scanning lines, and a first semiconductor film. The plurality of pixels is arranged in first to nth rows and first to mth columns. The first to nth scanning lines are electrically connected to the pixels in the respective first to nth rows. The first semiconductor film overlaps with at least one of first to kth scanning lines. A display region has a cutoff intersecting the first to nth rows, and the first semiconductor film is located in the cutoff. Each of the plurality of pixels includes a light-emitting element (OLED) and a transistor electrically connected to the OLED and having a second semiconductor film. The first semiconductor film and the second semiconductor film exist in the same layer. n and m are each a natural number larger than 1, and k is a natural number smaller than n.
    Type: Application
    Filed: September 24, 2021
    Publication date: January 13, 2022
    Inventor: Naoki TOKUDA
  • Patent number: 11222940
    Abstract: A display device according to an embodiment of the present invention includes: a base material including a display region and a curved region; a wiring line disposed on the base material and disposed from the display region over the curved region; and a heat dissipating layer formed corresponding to a position at which the wiring line is disposed in the curved region.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: January 11, 2022
    Assignee: Japan Display Inc.
    Inventor: Naoki Tokuda
  • Patent number: 11133372
    Abstract: A display device includes a plurality of pixels, first to nth scanning lines, and a first semiconductor film. The plurality of pixels is arranged in first to nth rows and first to mth columns. The first to nth scanning lines are electrically connected to the pixels in the respective first to nth rows. The first semiconductor film overlaps with at least one of first to kth scanning lines. A display region has a cutoff intersecting the first to nth rows, and the first semiconductor film is located in the cutoff. Each of the plurality of pixels includes a light-emitting element (OLED) and a transistor electrically connected to the OLED and having a second semiconductor film. The first semiconductor film and the second semiconductor film exist in the same layer. n and m are each a natural number larger than 1, and k is a natural number smaller than n.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: September 28, 2021
    Assignee: Japan Display Inc.
    Inventor: Naoki Tokuda
  • Publication number: 20200402461
    Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.
    Type: Application
    Filed: September 4, 2020
    Publication date: December 24, 2020
    Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
  • Patent number: 10825883
    Abstract: An organic EL display device according to an embodiment of the present invention includes: an ITO layer divided and disposed in a region where a pixel opening is formed; a capacitance insulating film disposed on the ITO layer; a lower electrode disposed on the capacitance insulating film; an organic layer disposed on the lower electrode; an upper electrode disposed on the organic layer; and a planarizing member disposed so as to soften a step of a step part of the lower electrode.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: November 3, 2020
    Assignee: Japan Display Inc.
    Inventor: Naoki Tokuda
  • Patent number: 10809553
    Abstract: Provided is a display device having a flexible substrate including an active region and a wiring region. The active region possesses a plurality of pixels each including a display element. The wiring region has a plurality of terminals, and a plurality of wirings extends from the active region to the plurality of terminals. An insulating film included in the active region and extending from the active region has a sidewall between an edge of the flexible substrate and the wiring adjacent to the edge in the wiring region. The sidewall has a curved portion on a plane in which the plurality of wirings is arranged, and a distance between the edge and the curved portion is curvedly varied.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: October 20, 2020
    Assignee: Japan Display Inc.
    Inventor: Naoki Tokuda
  • Patent number: 10769997
    Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: September 8, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
  • Publication number: 20200235193
    Abstract: A display device includes a plurality of pixels, first to nth scanning lines, and a first semiconductor film. The plurality of pixels is arranged in first to nth rows and first to mth columns. The first to nth scanning lines are electrically connected to the pixels in the respective first to nth rows. The first semiconductor film overlaps with at least one of first to kth scanning lines. A display region has a cutoff intersecting the first to nth rows, and the first semiconductor film is located in the cutoff. Each of the plurality of pixels includes a light-emitting element (OLED) and a transistor electrically connected to the OLED and having a second semiconductor film. The first semiconductor film and the second semiconductor film exist in the same layer. n and m are each a natural number larger than 1, and k is a natural number smaller than n.
    Type: Application
    Filed: April 6, 2020
    Publication date: July 23, 2020
    Inventor: Naoki TOKUDA
  • Publication number: 20200174305
    Abstract: Provided is a display device having a flexible substrate including an active region and a wiring region. The active region possesses a plurality of pixels each including a display element. The wiring region has a plurality of terminals, and a plurality of wirings extends from the active region to the plurality of terminals. An insulating film included in the active region and extending from the active region has a sidewall between an edge of the flexible substrate and the wiring adjacent to the edge in the wiring region. The sidewall has a curved portion on a plane in which the plurality of wirings is arranged, and a distance between the edge and the curved portion is curvedly varied.
    Type: Application
    Filed: February 4, 2020
    Publication date: June 4, 2020
    Inventor: Naoki TOKUDA
  • Patent number: 10591763
    Abstract: Provided is a display device having a flexible substrate including an active region and a wiring region. The active region possesses a plurality of pixels each including a display element. The wiring region has a plurality of terminals, and a plurality of wirings extends from the active region to the plurality of terminals. An insulating film included in the active region and extending from the active region has a sidewall between an edge of the flexible substrate and the wiring adjacent to the edge in the wiring region. The sidewall has a curved portion on a plane in which the plurality of wirings is arranged, and a distance between the edge and the curved portion is curvedly varied.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: March 17, 2020
    Assignee: Japan Display Inc.
    Inventor: Naoki Tokuda
  • Publication number: 20200013850
    Abstract: A display device according to an embodiment of the present invention includes: a base material including a display region and a curved region; a wiring line disposed on the base material and disposed from the display region over the curved region; and a heat dissipating layer formed corresponding to a position at which the wiring line is disposed in the curved region.
    Type: Application
    Filed: September 19, 2019
    Publication date: January 9, 2020
    Applicant: Japan Display Inc.
    Inventor: Naoki TOKUDA
  • Publication number: 20190392759
    Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.
    Type: Application
    Filed: September 6, 2019
    Publication date: December 26, 2019
    Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie