Patents by Inventor Tohru Okabe

Tohru Okabe 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: 20220020958
    Abstract: A display device includes: a base substrate; a thin-film transistor layer provided on the base substrate, a light-emitting element layer provided on the thin-film transistor layer; and a sealing film provided on the light-emitting element. Each of light-emitting elements includes: a first electrode; a functional layer; and a second electrode stacked on top of another in a stated order. The display device includes: a display region; a frame region; and a non-display region. The non-display region includes a through hole. The display device includes a separation wall shaped into a frame and provided to the non-display region along an edge of the through hole. The separation wall includes: a first resin layer: and a first metal layer provided on the first resin layer. The first metal layer includes a first protrusion shaped into a canopy, and protruding from the first resin layer toward the display region.
    Type: Application
    Filed: February 27, 2019
    Publication date: January 20, 2022
    Inventors: TOHRU OKABE, SHINSUKE SAIDA, RYOSUKE GUNJI, SHINJI ICHIKAWA, HIROHARU JINMURA, AKIRA INOUE, YOSHIHIRO NAKADA
  • Publication number: 20210367027
    Abstract: In a display region, each first power-source line and each second power-source line intersecting with the first power-source line are electrically connected together via a contact hole in a second inorganic insulating film. In addition, each source line and each second power-source line intersect with each other via the second inorganic insulating film and a first organic insulating film.
    Type: Application
    Filed: May 10, 2018
    Publication date: November 25, 2021
    Inventors: Tohru OKABE, Shinsuke SAIDA, Hiroki TANIYAMA, Ryosuke GUNJI, Shinji ICHIKAWA, Kohji ARIGA, Akira INOUE, Yoshihiro KOHARA, Koji TANIMURA, Yoshihiro NAKADA, Hiroharu JINMURA
  • Publication number: 20210351263
    Abstract: According to an aspect of the disclosure, a lead wiring line provided in a frame region to extend therein while intersecting with a frame-shaped dam wall, formed of a same material and in a same layer as each of display wiring lines in which a first metal layer, a second metal layer, and a third metal layer are layered in sequence, electrically connected to the display wiring line on a display region side, and electrically connected to a terminal on a terminal portion side, the third metal layer is provided to cover a side surface of the first metal layer, and a side surface and an upper face of the second metal layer.
    Type: Application
    Filed: September 25, 2018
    Publication date: November 11, 2021
    Inventors: TOHRU OKABE, TAKESHI YANEDA
  • Publication number: 20210343238
    Abstract: The present application discloses a current-driven display device capable of providing satisfactory display without flickering even when pause drive is performed. In a pixel circuit 15, a first initialization transistor T4 initializes a gate voltage Vg, and thereafter a voltage on a data signal line Di is written to a holding capacitor Cst via a write control transistor T2 and a drive transistor T1. Thereafter, emission control transistors T5 and T6 are turned on, so that a drive current I1 from the drive transistor T1 causes an organic EL element OL to emit light. During this emission period, even if the gate voltage Vg is decreased due to a leakage current through the first initialization transistor T4 in an OFF state, the decrease is compensated for by increasing a threshold control voltage being provided to a threshold control terminal TG of the drive transistor T1.
    Type: Application
    Filed: September 28, 2018
    Publication date: November 4, 2021
    Inventors: TOHRU OKABE, TAKESHI YANEDA
  • Publication number: 20210343226
    Abstract: A pixel circuit including a drive transistor and a capacitor electrically connected to a control terminal of the drive transistor, a light-emitting element, a first power supply voltage line intersecting a data signal line, and a second power supply voltage line electrically connected to the control terminal via the capacitor are provided, and in a writing period in which a scanning signal line becomes active, the first power supply voltage line and a second conduction terminal of the drive transistor are not conductive with each other, and in a light emission period of the light-emitting element, the first power supply voltage line and the second conduction terminal of the drive transistor are conductive with each other.
    Type: Application
    Filed: September 28, 2018
    Publication date: November 4, 2021
    Inventors: TOHRU OKABE, TAKESHI YANEDA
  • Publication number: 20210327996
    Abstract: A display device includes a short ring TFT, wherein the short ring TFT includes a semiconductor layer, a first gate electrode, a second gate electrode, a first gate insulating film provided between the semiconductor layer and the first gate electrode, and a second gate insulating film provided between the semiconductor layer and the second gate electrode, one of a pair of adjacent lead-out wiring lines is electrically connected to a source region of the semiconductor layer, the other of the pair of adjacent lead-out wiring lines is electrically connected to a drain region of the semiconductor layer, one of the first gate electrode and the second gate electrode is electrically connected to the source region or the drain region, and the other of the first gate electrode and the second gate electrode is electrically connected to a threshold value control wiring line.
    Type: Application
    Filed: August 31, 2018
    Publication date: October 21, 2021
    Inventors: TOHRU OKABE, TAKESHI YANEDA
  • Publication number: 20210313412
    Abstract: A display devise includes: a resin substrate; a TFT layer; and a light-emitting element. A bending portion is provided with a first resin film formed of the same material and in the same layer as those of a first flattening film, and the first resin film fills a slit. An upper face of the first resin film is provided with a plurality of first connection wiring lines formed of a third metal film, and the plurality of first connection wiring lines extend in parallel to each other in a direction intersecting the extending direction of the bending portion. The plurality of first connection wiring lines are electrically connected to a plurality of first lead-out wiring lines, respectively in a display region side of the slit, and electrically connected to a plurality of second lead-out wiring lines, respectively in a terminal portion side of the slit.
    Type: Application
    Filed: August 28, 2018
    Publication date: October 7, 2021
    Inventors: TOHRU OKABE, RYOSUKE GUNJI, SHINJI ICHIKAWA, SHINSUKE SAIDA, SHOJI OKAZAKI, TOKUO YOSHIDA, HIROKI TANIYAMA, KOHJI ARIGA, HIROHARU JINMURA, AKIRA INOUE, YOSHIHIRO NAKADA, YOSHIHIRO KOHARA, KOJI TANIMURA
  • Publication number: 20210288286
    Abstract: A display device includes: a sealing film provided so as to cover light-emitting elements at least partially constituting a display area and including a first inorganic film, an organic film, and a second inorganic film stacked in this order; and a first damming wall in a frame area around the display area, the first damming wall surrounding the display area and overlapping a peripheral portion of the organic film, wherein at least one inorganic insulation film in a TFT layer has an upwardly open, first opening at least in a part of an area between the display area and the first damming wall, and the organic film is provided so as to fill in the first opening.
    Type: Application
    Filed: August 2, 2018
    Publication date: September 16, 2021
    Inventors: TOHRU OKABE, SHOJI OKAZAKI, RYOSUKE GUNJI, SHINSUKE SAIDA, SHINJI ICHIKAWA, TOKUO YOSHIDA, HIROHARU JINMURA, AKIRA INOUE, YOSHIHIRO NAKADA, KOJI TANIMURA, YOSHIHIRO KOHARA
  • Publication number: 20210288129
    Abstract: A display device includes: a plurality of control lines; a plurality of power supply lines; a plurality of data signal lines; an oxide semiconductor layer; a first metal layer; a gate insulation film; a first inorganic insulation film; a second metal layer; a second inorganic insulation film; and a third metal layer. The oxide semiconductor layer, in a plan view, contains therein insular semiconductor lines between a plurality of drivers and a display area. The semiconductor lines cross the plurality of control lines and the plurality of power supply lines, are in contact with the plurality of control lines via an opening in a gate insulation film, are in contact with the plurality of power supply lines via an opening in the first inorganic insulation film, and have a plurality of waisted portions.
    Type: Application
    Filed: July 30, 2018
    Publication date: September 16, 2021
    Inventors: TOHRU OKABE, SHINSUKE SAIDA, SHINJI ICHIKAWA, HIROKI TANIYAMA, RYOSUKE GUNJI, KOHJI ARIGA, YOSHIHIRO NAKADA, KOJI TANIMURA, YOSHIHIRO KOHARA, HIROHARU JINMURA, AKIRA INOUE
  • Patent number: 11114522
    Abstract: A display device includes a plurality of picture elements, wherein a first electrode is formed in each of the plurality of picture elements, a cover layer is formed such that an opening of the first electrode is formed, a spacer in a layer identical to the cover layer is provided between two of the first electrodes, the spacer is formed with a height greater than a height of the cover layer, and an outer edge portion of the spacer is spaced from an outer edge portion of the cover layer.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: September 7, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shinji Ichikawa, Hiroki Taniyama, Shinsuke Saida, Ryosuke Gunji, Tohru Okabe, Yoshihiro Nakada, Hiroharu Jinmura, Akira Inoue
  • Patent number: 11107845
    Abstract: A Thin Film Transistor (TFT) substrate includes a first semiconductor film, a first electrically conductive member provided in a layer higher than the first semiconductor film, an interlayer insulating film provided in a layer higher than the first electrically conductive member and including a first through hole, a second semiconductor film provided in a layer higher than the interlayer insulating film, a second electrically conductive member provided in a layer higher than the second semiconductor film, an organic insulating film provided in a layer higher than the second electrically conductive member and including a second through hole, and a third electrically conductive member provided in a layer higher than the organic insulating film. A contact hole extends through the first and the second through hole to the first electrically conductive member.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: August 31, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tohru Okabe, Hirohiko Nishiki, Takeshi Yaneda
  • Publication number: 20210257579
    Abstract: A display area is provided with a plurality of first conductive layers formed of the same material and in the same layer as first electrodes. The first conductive layers are each positioned under a corresponding one of plurality of first photo spacers. A frame area is provided with a second conductive layer formed of the same material and in the same layer as the first electrodes. The second conductive layer includes a plurality of openings each formed under a corresponding one of a plurality of second photo spacers.
    Type: Application
    Filed: August 23, 2018
    Publication date: August 19, 2021
    Inventors: TOHRU OKABE, TAKESHI YANEDA
  • Publication number: 20210225881
    Abstract: An active matrix substrate including a resin substrate including a plurality of external connection terminals arranged near a display region, the active matrix substrate includes: a plurality of first lead wires each extending from one of the external connection terminals to the display region; and a plurality of second lead wires each extending from one of the external connection terminals to a separation line, the second lead wires being arranged with an arrangement pitch along the separation line, and the arrangement pitch of the second lead wires being greater than an arrangement pitch of the first lead wires.
    Type: Application
    Filed: August 23, 2018
    Publication date: July 22, 2021
    Inventors: TOHRU OKABE, RYOSUKE GUNJI, SHINJI ICHIKAWA, SHINSUKE SAIDA, SHOJI OKAZAKI, TOKUO YOSHIDA, HIROKI TANIYAMA, KOHJI ARIGA, HIROHARU JINMURA, AKIRA INOUE, YOSHIHIRO NAKADA, YOSHIHIRO KOHARA, KOJI TANIMURA
  • Publication number: 20210210583
    Abstract: In a TFT layer provided on a base substrate, a first metal film, a first inorganic insulating film, a second metal film, a second inorganic insulating film, a third metal film, a first flattening film, a fourth metal film, and a second flattening film are sequentially layered. In a frame region, a slit is formed in the second flattening film to surround a display region, a first conductive layer formed by the fourth metal film is provided on the first flattening film exposed from the slit, and a TFT of a drive circuit is provided on the base substrate side of the first conductive layer to overlap with the first conductive layer.
    Type: Application
    Filed: May 22, 2018
    Publication date: July 8, 2021
    Inventors: TOHRU OKABE, RYOSUKE GUNJI, KOHJI ARIGA, HIROKI TANIYAMA, SHINJI ICHIKAWA, SHINSUKE SAIDA, HIROHARU JINMURA, AKIRA INOUE, YOSHIHIRO KOHARA, KOJI TANIMURA, YOSHIHIRO NAKADA
  • Patent number: 11028270
    Abstract: [Problem] To provide a composition for a black matrix which is a material suitable for manufacturing a black matrix, which is suitable for a high luminance display device structure and has high heat resistance and high light-shielding properties. [Means for Solution] The present invention uses a composition for a black matrix comprising: (I) a black colorant containing carbon black having a volume average particle diameter of 1 to 300 nm; (II) a siloxane polymer to be obtained by hydrolyzing and condensing a silane compound represented by a prescribed formula in the presence of an acidic or basic catalyst; (III) surface modified silica fine particles; (IV) a thermal base generator; and (V) a solvent.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: June 8, 2021
    Assignee: Merck Patent GmbH
    Inventors: Hirohiko Nishiki, Tohru Okabe, Izumi Ishida, Shogo Murashige, Atsuko Noya, Toshiaki Nonaka, Naofumi Yoshida
  • Patent number: 11024656
    Abstract: An active matrix substrate in which step-caused disconnection of a metal film in a contact hole does not easily occur includes a first to third insulating films and first to third metal films on a glass substrate and a contact hole electrically connecting the first and second metal film, the contact hole including first to third hole present respectively in the first to third insulating films, the first and third metal films being in contact with each other inside the first hole, the second insulating film and an oxide semiconductor film overlapping with each other in a region below the third hole, the second and third metal films being in contact with each other in a region above the first insulating film and either inside or below the third hole.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: June 1, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tohru Okabe, Hirohiko Nishiki, Takeshi Yaneda
  • Patent number: 11018214
    Abstract: A display device includes a resin substrate, a TFT layer, a light-emitting element, a frame region, a terminal portion, a bending portion, a plurality of frame wiring lines, and at least a one-layer inorganic film. The light-emitting element includes a metal electrode provided on a flattening film included in the TFT layer. In the bending portion, an opening is formed in at least the one-layer inorganic film. A frame flattening film is provided to fill the opening. The plurality of frame wiring lines are provided on the frame flattening film across the opening. The frame wiring line is formed of a metal material identical to the metal material of the metal electrode. The frame flattening film is formed of a resin material identical to the resin material of the flattening film.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: May 25, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tohru Okabe, Ryosuke Gunji, Hiroki Taniyama, Shinsuke Saida, Hiroharu Jinmura, Yoshihiro Nakada, Akira Inoue
  • Patent number: 10991729
    Abstract: An active matrix substrate having low susceptibility to contact failure between two conductor films is provided. An oxide semiconductor film converted into a conductor is provided in a layer between a substrate and a first metal film. Within a contact hole, the oxide semiconductor film converted into a conductor is in contact with a second metal film. Outside of the contact hole, the oxide semiconductor film converted into a conductor is in contact with the first metal film.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: April 27, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tohru Okabe, Hirohiko Nishiki, Takeshi Yaneda
  • Publication number: 20210098559
    Abstract: Frame wiring lines are provided in a frame region, a flattening film in which a frame-shaped slit is formed in the frame region is provided in the display region and the frame region, a plurality of first electrodes constituting light-emitting elements are provided on the flattening film, and conductive layer made of the same material and formed in the same layer as those of each of the plurality of first electrodes are provided covering at least end faces of the frame wiring lines exposed from the slit.
    Type: Application
    Filed: March 30, 2018
    Publication date: April 1, 2021
    Inventors: HIROKI TANIYAMA, RYOSUKE GUNJI, SHINSUKE SAIDA, SHINJI ICHIKAWA, TOHRU OKABE, KOHJI ARIGA, AKIRA INOUE, YOSHIHIRO KOHARA, KOJI TANIMURA, YOSHIHIRO NAKADA, HIROHARU JINMURA
  • Publication number: 20210083226
    Abstract: The disclosure has an object to achieve a high level of height precision for spacers on a back plane. A display device includes: edge covers having a plurality of openings in which first electrodes are exposed; and a planarization film having first flat portions, second flat portions, and contact holes. The plurality of openings respectively overlap the first flat portions in a plan view. The second flat portions are located between the plurality of openings in a plan view. Each edge cover overlapping one of the first flat portions in a plan view has, on a second electrode side, a surface that has a first height from a bottom surface of the planarization film on a substrate side. Each second flat portion has, on the second electrode side, a surface that has a second height from the bottom surface. The first height is smaller than the second height.
    Type: Application
    Filed: January 18, 2018
    Publication date: March 18, 2021
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: TOHRU OKABE, SHINSUKE SAIDA, HIROKI TANIYAMA, SHINJI ICHIKAWA, RYOSUKE GUNJI, YOSHIHIRO NAKADA, AKIRA INOUE, HIROHARU JINMURA