Patents by Inventor Hiroshi Tabatake

Hiroshi Tabatake 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: 11903264
    Abstract: According to one embodiment, a display device includes a substrate, a circuit layer including a metal-made feed line in a surrounding area, an insulating layer covering the circuit layer, a lower electrode, a rib, a partition above the rib, an upper electrode connected to the partition, an organic layer between the electrodes and a conductive layer connected to the partition. The partition and the conductive layer each includes a metal-made lower portion and an upper portion protruding from a side surface of the lower portion. The lower portion of the conductive layer and the feed line are in contact with each other in the first contact portion in the surrounding area.
    Type: Grant
    Filed: March 17, 2023
    Date of Patent: February 13, 2024
    Assignee: JAPAN DISPLAY INC.
    Inventor: Hiroshi Tabatake
  • Patent number: 11874993
    Abstract: Provided is a display device including a first dam surrounding the display area, a second dam surrounding the first dam, a first sensor electrode and a second sensor electrode overlapping the display area, a first sensor wiring and a second sensor wiring over the first dam and electrically connected to the first sensor electrode and the second sensor electrode, respectively, a first wiring under the second dam and electrically connected to the first sensor wiring at a first contact portion, and a second wiring under the second dam and electrically connected to the second sensor wiring at a second contact portion.
    Type: Grant
    Filed: March 20, 2023
    Date of Patent: January 16, 2024
    Assignee: JAPAN DISPLAY INC.
    Inventors: Hideyuki Takahashi, Hiroshi Tabatake, Sho Yanagisawa
  • Patent number: 11869421
    Abstract: According to one embodiment, a display device includes a base, a plurality of pixels, a power supply line and a power supply line drive circuit. The pixels each include a pixel circuit, a display element including a lower electrode, an upper electrode and an organic layer including a light-emitting layer. The upper electrode is connected to the power supply line that provides a predetermined potential to the upper electrode. The power supply line drive circuit supplies, to the power supply line, a first potential to the upper electrode during a light-emitting period and supplies, to the power supply line, a second potential to the upper electrode during a non-light-emitting period.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: January 9, 2024
    Assignee: Japan Display Inc.
    Inventors: Hiroshi Tabatake, Tetsuo Morita
  • Publication number: 20230413613
    Abstract: According to one embodiment, a display device includes a substrate, an insulating layer, a lower electrode, a rib including an aperture and covering a periphery of the lower electrode, a partition above the rib, an upper electrode being in contact with the partition, and an organic layer between the electrodes. The organic layer includes a first organic layer that is in contact with the lower electrode through the aperture, and a second organic layer on the partition. At least a part of the periphery of the lower electrode is located between the insulating layer and the partition in a thickness direction of the insulating layer.
    Type: Application
    Filed: August 25, 2023
    Publication date: December 21, 2023
    Applicant: Japan Display Inc.
    Inventor: Hiroshi TABATAKE
  • Publication number: 20230403904
    Abstract: According to one embodiment, a display device includes a substrate, a pixel circuit, an insulating layer including a contact hole, a lower electrode connected to the pixel circuit via the contact hole, an upper electrode, an organic layer between the lower electrode and the upper electrode, a rib formed of an inorganic material and including an aperture, and a partition above the rib. The organic layer includes a first organic layer in contact with the lower electrode via the aperture and a second organic layer located on the partition and spaced apart from the first organic layer. The partition overlaps an entire of the contact hole in plan view.
    Type: Application
    Filed: August 29, 2023
    Publication date: December 14, 2023
    Applicant: Japan Display Inc.
    Inventor: Hiroshi TABATAKE
  • Publication number: 20230371342
    Abstract: According to one embodiment, a display device includes a base, a lower electrode disposed in a first region on the base, a rib covering a part of the lower electrode and including an aperture overlapping the first region, a partition including a lower portion disposed on the rib and an upper portion protruding from a side surface of the lower portion, which compartmentalizes the first region and a second region different from the first region, an organic layer disposed in the first region and in contact with the lower electrode via the aperture and an upper electrode disposed on the organic layer, and the organic layer and the upper electrode are not disposed in the second region.
    Type: Application
    Filed: May 9, 2023
    Publication date: November 16, 2023
    Applicant: Japan Display Inc.
    Inventors: Hiroshi TABATAKE, Hiroyuki KIMURA
  • Publication number: 20230305654
    Abstract: Provided is a display device including a first dam surrounding the display area, a second dam surrounding the first dam, a first sensor electrode and a second sensor electrode overlapping the display area, a first sensor wiring and a second sensor wiring over the first dam and electrically connected to the first sensor electrode and the second sensor electrode, respectively, a first wiring under the second dam and electrically connected to the first sensor wiring at a first contact portion, and a second wiring under the second dam and electrically connected to the second sensor wiring at a second contact portion.
    Type: Application
    Filed: March 20, 2023
    Publication date: September 28, 2023
    Applicant: Japan Display Inc.
    Inventors: Hideyuki TAKAHASHI, Hiroshi TABATAKE, Sho YANAGISAWA
  • Publication number: 20230309367
    Abstract: According to one embodiment, a method of manufacturing a display device, includes forming a partition including a lower portion disposed on a first surface of a base and an upper portion protruding from a side surface of the lower portion, and measuring the distance between a side surface of the lower portion and an end portion of the upper portion from a side of a second surface opposing the first surface of the base.
    Type: Application
    Filed: March 24, 2023
    Publication date: September 28, 2023
    Applicant: Japan Display Inc.
    Inventor: Hiroshi TABATAKE
  • Publication number: 20230301159
    Abstract: According to one embodiment, a display device includes a substrate, an insulating layer above the substrate, a lower electrode, a rib, a partition, an upper electrode, an organic layer between the electrodes, a dam structure including a protrusion in a surrounding area, and a conductive layer in the surrounding area covering at least a part of the dam structure and connected to the partition. The partition and the conductive layer include a conductive lower portion and an upper portion protruding from the lower portion. The end portion of the conductive layer is between the protrusion and the end portion of the substrate.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 21, 2023
    Applicant: Japan Display Inc.
    Inventor: Hiroshi TABATAKE
  • Publication number: 20230301142
    Abstract: According to one embodiment, a display device includes a substrate, a circuit layer including a metal-made feed line in a surrounding area, an insulating layer covering the circuit layer, a lower electrode, a rib, a partition above the rib, an upper electrode connected to the partition, an organic layer between the electrodes and a conductive layer connected to the partition. The partition and the conductive layer each includes a metal-made lower portion and an upper portion protruding from a side surface of the lower portion. The lower portion of the conductive layer and the feed line are in contact with each other in the first contact portion in the surrounding area.
    Type: Application
    Filed: March 17, 2023
    Publication date: September 21, 2023
    Applicant: Japan Display Inc.
    Inventor: Hiroshi TABATAKE
  • Publication number: 20230292551
    Abstract: A display device includes a light-emitting element; a first transistor and a second transistor connected in series between the light-emitting element and a driving power line; a third transistor electrically connected to a gate electrode of the first transistor; and a fourth transistor connected in parallel between a drain electrode of the first transistor and the light-emitting element, wherein a ratio of a channel width W1 to a channel length L1 of the first transistor (a W1/L1 ratio) and a ratio of a channel width W2 to a channel length L2 of the second transistor (a W2/L2 ratio) are larger than a ratio of a channel width W3 to a channel length L3 of the third transistor (a W3/L3 ratio) and a ratio of a channel width W4 to a channel length L4 of the fourth transistor (a W4/L4 ratio).
    Type: Application
    Filed: March 1, 2023
    Publication date: September 14, 2023
    Applicant: Japan Display Inc.
    Inventors: Masashi TSUBUKU, Takeshi SAKAI, Kentaro MIURA, Hajime WATAKABE, Takaya TAMARU, Hiroshi TABATAKE, Yutaka UMEDA
  • Publication number: 20230284510
    Abstract: An organic electroluminescence display device includes a substrate including a first surface, a first area arranged on the first surface and including one or more first spacers and a plurality of pixels each including a light-emitting layer, a third area arranged on the first surface, surrounding the first area, and not including spacers, and a second area arranged on the first surface, surrounding the third area, and including one or more second spacers. The plurality of pixels each including the light-emitting layer is arranged along a first direction and a second direction intersecting the first direction, and a length of the third area in the second direction is a total length of pitches for at least two pixels.
    Type: Application
    Filed: January 20, 2023
    Publication date: September 7, 2023
    Applicant: Japan Display Inc.
    Inventors: Sho YANAGISAWA, Masato ISHIKAWA, Tatsuya NISHINO, Hideyuki TAKAHASHI, Hiroshi TABATAKE
  • Publication number: 20230232684
    Abstract: According to one embodiment, a display device includes a substrate, an insulating layer above the substrate, a lower electrode in a display area, a rib including an aperture overlapping the lower electrode, a conductive partition above the rib in the display area, an upper electrode facing the lower electrode and connected to the partition, an organic layer at least partially located between the lower and upper electrodes and emitting light based on a potential difference between the electrodes, a feed line in a surrounding area around the display area, and a conductive layer provided above the rib in the surrounding area and connected to the feed line and the partition.
    Type: Application
    Filed: January 19, 2023
    Publication date: July 20, 2023
    Applicant: Japan Display Inc.
    Inventor: Hiroshi TABATAKE
  • Publication number: 20230232694
    Abstract: According to one embodiment, a display device includes a substrate, an insulating layer above the substrate, a lower electrode above the insulating layer in a display area, an upper electrode facing the lower electrode, an organic layer provided in the display area and a surrounding area, and a first ridge in the surrounding area. The first ridge includes a lower portion, and an upper portion provided on the lower portion and including an end portion protruding from a side surface of the lower portion. At least part of the organic layer is divided by the first ridge in the surrounding area.
    Type: Application
    Filed: January 19, 2023
    Publication date: July 20, 2023
    Applicant: Japan Display Inc.
    Inventor: Hiroshi TABATAKE
  • Patent number: 11706951
    Abstract: The first light-emitting layer is higher in light-emission start voltage than each of the second light-emitting layer and the third light-emitting layer. The second light-emitting layer is higher in visibility of the emission color than each of the first light-emitting layer and the third light-emitting layer. The electroluminescence layer has an inter-pixel section between an adjacent pair of the openings and along the upper surface of the insulation layer. The inter-pixel section between the first opening and the second opening has a first resistance value. The inter-pixel section between the second opening and the third opening has a second resistance value. The inter-pixel section between the third opening and the first opening has a third resistance value. The first resistance value is larger than each of the second resistance value and the third resistance value.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: July 18, 2023
    Assignee: Japan Display Inc.
    Inventors: Kenji Nakao, Hiroshi Tabatake, Akihito Sato
  • Publication number: 20230217730
    Abstract: According to one embodiment, a display device includes a substrate, an insulating layer, a lower electrode, a rib including an aperture and covering a periphery of the lower electrode, a partition above the rib, an upper electrode being in contact with the partition, and an organic layer between the electrodes. The organic layer includes a first organic layer that is in contact with the lower electrode through the aperture, and a second organic layer on the partition. At least a part of the periphery of the lower electrode is located between the insulating layer and the partition in a thickness direction of the insulating layer.
    Type: Application
    Filed: December 29, 2022
    Publication date: July 6, 2023
    Applicant: Japan Display Inc.
    Inventor: Hiroshi TABATAKE
  • Publication number: 20230214042
    Abstract: According to one embodiment, a display device includes a base, a display unit containing pixels, a power supply circuit, a touch controller and a switching circuit disposed between the display unit, the power supply circuit and the touch controller. The pixels each includes a pixel circuit and a display element including a lower electrode connected to the pixel circuit, an upper electrode disposed to oppose the lower electrode and an organic layer including a light-emitting layer disposed between the lower electrode and the upper electrode. The upper electrode is connected to the switching circuit, and the switching circuit selectively switches between connecting the upper electrode to the power supply circuit and connecting the upper electrode to the touch controller.
    Type: Application
    Filed: March 16, 2023
    Publication date: July 6, 2023
    Applicant: Japan Display Inc.
    Inventors: Hiroshi TABATAKE, Hideyuki TAKAHASHI
  • Publication number: 20230217735
    Abstract: According to one embodiment, a display device includes a substrate, a pixel circuit, an insulating layer including a contact hole, a lower electrode connected to the pixel circuit through the contact hole, an upper electrode, an organic layer between the lower and upper electrodes, a rib including an aperture, a partition above the rib, and a filling material inside the contact hole. The organic layer includes a first organic layer in contact with the lower electrode through the aperture, and a second organic layer on the partition. The partition and the rib overlap at least part of the contact hole and the filling material in plan view.
    Type: Application
    Filed: December 22, 2022
    Publication date: July 6, 2023
    Applicant: Japan Display Inc.
    Inventor: Hiroshi TABATAKE
  • Publication number: 20230209956
    Abstract: According to one embodiment, a display device Includes a substrate, a pixel circuit, an insulating layer including a contact hole, a lower electrode connected to the pixel circuit via the contact hole, an upper electrode, an organic layer between the lower electrode and the upper electrode, a rib formed of an inorganic material and including an aperture, and a partition above the rib. The organic layer includes a first organic layer in contact with the lower electrode via the aperture and a second organic layer located on the partition and spaced apart from the first organic layer. The partition overlaps an entire of the contact hole in plan view.
    Type: Application
    Filed: December 21, 2022
    Publication date: June 29, 2023
    Applicant: Japan Display Inc.
    Inventor: Hiroshi TABATAKE
  • Publication number: 20230137112
    Abstract: According to one embodiment, a display apparatus includes a plurality of semiconductor layers, a first insulation film, a first conductive layer, a second insulation film and a display element includes a second conductive layer. The first conductive layer and the second conductive layer are opposed to each other to form a capacitance unit.
    Type: Application
    Filed: December 29, 2022
    Publication date: May 4, 2023
    Applicant: Japan Display Inc.
    Inventors: Kazuyoshi OMATA, Hiroyuki KIMURA, Makoto SHIBUSAWA, Hiroshi TABATAKE