Patents Assigned to Japan Display Inc.
  • Publication number: 20240097043
    Abstract: A semiconductor device according to an embodiment of the present invention includes an oxide insulating layer, an oxide semiconductor layer, a gate insulating layer, a gate electrode, and a protective insulating layer. The gate insulating layer includes a first region overlapping the gate electrode and a second region not overlapping the gate electrode. The second region is in contact with the protective insulating layer. The oxide insulating layer includes a third region overlapping the gate electrode and a fourth region not overlapping the gate electrode and the oxide semiconductor layer. The fourth region is in contact with the gate insulating layer. The oxide semiconductor layer includes a channel region, a source region, and a drain region. Each of the source region, the drain region, and the second region contains an impurity. A hydrogen concentration of the second region is greater than a hydrogen concentration of the first region.
    Type: Application
    Filed: August 28, 2023
    Publication date: March 21, 2024
    Applicant: Japan Display Inc.
    Inventors: Hajime WATAKABE, Masashi TSUBUKU, Toshinari SASAKI, Takay TAMARU
  • Publication number: 20240094582
    Abstract: According to one embodiment, a display device includes a first substrate having a display area where a plurality of pixels are arranged, a second substrate opposed to the first substrate, a liquid crystal layer arranged between the first substrate and the second substrate, and spacers holding a gap between the first substrate and the second substrate. The spacers are arranged in the display area. The display area includes a first display area including a center of the display area and a second display area around the first display area. An arrangement density of the spacers in the first display area is smaller than an arrangement density of the spacers in the second display area.
    Type: Application
    Filed: September 20, 2023
    Publication date: March 21, 2024
    Applicant: Japan Display Inc.
    Inventors: Keiji TAGO, Atsuko IMOTO, Kenichi AKUTSU
  • Publication number: 20240099073
    Abstract: According to one embodiment, a display device includes an insulating layer formed of an inorganic material, a lower electrode provided on the insulating layer, a partition which surrounds the lower electrode and includes a conductive lower portion provided on the insulating layer and an upper portion protruding from a side surface of the lower portion, an organic layer which covers the lower electrode and emits light based on application of voltage, and an upper electrode which covers the organic layer and is in contact with the lower portion. The lower electrode includes an end portion located under the upper portion and having a thickness which decreases toward the lower portion.
    Type: Application
    Filed: September 20, 2023
    Publication date: March 21, 2024
    Applicant: Japan Display Inc.
    Inventor: Kaichi FUKUDA
  • Publication number: 20240099059
    Abstract: According to one embodiment, a measuring method includes forming a partition including a lower portion arranged on a first surface side of a base and an upper portion protruding from a side surface of the lower portion, acquiring a first image including the partition observed from a second surface side opposed to the first surface of the base by an optical microscope, analyzing the acquired first image, and measuring an amount of protrusion by which an end portion of the upper portion protrudes from the side surface of the lower portion, based on the analysis result.
    Type: Application
    Filed: September 20, 2023
    Publication date: March 21, 2024
    Applicant: Japan Display Inc.
    Inventor: Satoru TOMITA
  • Publication number: 20240099110
    Abstract: According to one embodiment, a manufacturing method of a display device includes preparing a processing substrate by forming a lower electrode, a rib and a partition, forming an organic layer on the lower electrode, forming an upper electrode on the organic layer, forming a first transparent layer on the upper electrode by depositing a first organic material, forming a second transparent layer on the first transparent layer by depositing a second organic material, and depositing the second organic material on each of a plurality of crystal oscillators included in a film thickness measurement device by emitting the second organic material from first and second nozzles of an evaporation source before forming the second transparent layer.
    Type: Application
    Filed: September 20, 2023
    Publication date: March 21, 2024
    Applicant: Japan Display Inc.
    Inventors: Hirofumi MIZUKOSHI, Takanobu TAKENAKA, Masaru TAKAYAMA, Kaichi FUKUDA
  • Patent number: 11937448
    Abstract: An electronic device is provided and includes first region including organic layer in light emitting element; nitride layers over organic layer; first organic insulating layer over organic layer; and second region including nitride layers, outside first region, wherein second region does not include organic layer and first organic insulating layer, wherein nitride layers include first, second and third nitride layers, wherein first nitride layer is between organic layer and first organic insulating layer in first region, wherein second and third nitride layers are over first nitride layer, and wherein second nitride layer is in contact with first organic insulating layer in first region.
    Type: Grant
    Filed: September 30, 2022
    Date of Patent: March 19, 2024
    Assignee: Japan Display Inc.
    Inventors: Hiroki Ohara, Akinori Kamiya
  • Patent number: 11937463
    Abstract: According to one embodiment, a display device includes a substrate, a lower electrode, a rib, a partition including a lower portion and an upper portion, an organic layer provided on the lower electrode and including a light emitting layer, and an upper electrode provided on the organic layer and in contact with the lower portion of the partition. The organic layer includes a first end portion located on the rib, and a second end portion located on the rib on an opposite side of the first end portion. A thickness of the upper electrode immediately above the second end portion is greater than a thickness of the upper electrode immediately above the first end portion.
    Type: Grant
    Filed: August 16, 2023
    Date of Patent: March 19, 2024
    Assignee: JAPAN DISPLAY INC.
    Inventor: Masaru Takayama
  • Patent number: 11935898
    Abstract: A semiconductor device including: a first gate electrode; a first gate insulating layer on the first gate electrode; a first oxide semiconductor layer on the first insulating layer; source and drain electrodes connected to the first oxide semiconductor layer; a second gate insulating layer on the first oxide semiconductor layer; a second oxide semiconductor layer on the second gate insulating layer; a second gate electrode on the second oxide semiconductor layer, the second gate electrode being in contact with the second oxide semiconductor layer; a first insulating layer on the second gate electrode, the first insulating layer having a part of a first aperture overlapping with the second oxide semiconductor layer in a planar view; and a first connecting electrode electrically connecting the first gate electrode and the second gate electrode via the first aperture.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: March 19, 2024
    Assignee: Japan Display Inc.
    Inventors: Tatsuya Toda, Toshinari Sasaki, Masayoshi Fuchi
  • Patent number: 11934075
    Abstract: According to one embodiment, a display device includes a display portion, a first terminal, a second terminal located between the display portion and the first terminal, and an insulating film, in which each of the first terminal and the second terminal is a stacked layer body of a metal electrode and a first transparent electrode, in the first terminal, the first transparent electrode is in contact with an upper surface and a side surface of the metal electrode, in the second terminal, the insulating film is in contact with a side surface of the metal electrode, and the first transparent electrode is in contact with the upper surface of the metal electrode in an inside surrounded by the insulating film.
    Type: Grant
    Filed: July 8, 2021
    Date of Patent: March 19, 2024
    Assignee: Japan Display Inc.
    Inventors: Kentaro Kawai, Keita Sasanuma, Takayuki Kato
  • Patent number: 11937488
    Abstract: According to one embodiment, a manufacturing method of a display device includes preparing a processing substrate by forming a lower electrode, forming a rib, and forming a partition including a lower portion and an upper portion, forming an organic layer on the lower electrode, forming an upper electrode on the organic layer, forming a first transparent layer on the upper electrode, and forming a second transparent layer on the first transparent layer. The first transparent layer and the second transparent layer are formed of organic materials different from each other. A refractive index of the second transparent layer is less than a refractive index of the first transparent layer.
    Type: Grant
    Filed: September 5, 2023
    Date of Patent: March 19, 2024
    Assignee: JAPAN DISPLAY INC.
    Inventor: Yuko Matsumoto
  • Patent number: 11934062
    Abstract: A display device is providing and includes first substrate including first transparent substrate, and pixel electrode disposed in each of pixels on first transparent substrate; second substrate including second transparent substrate having first and second side surfaces, and common electrode disposed over pixels; and liquid crystal layer disposed between first and second substrates and including stripe-shaped polymer and liquid crystal molecules.
    Type: Grant
    Filed: December 9, 2022
    Date of Patent: March 19, 2024
    Assignee: Japan Display Inc.
    Inventors: Kojiro Ikeda, Tenfu Nakamura, Kentaro Okuyama
  • Patent number: 11935967
    Abstract: The purpose of the invention is to form the TFT of the oxide semiconductor, in which influence of variation in mask alignment is suppressed, thus, manufacturing a display device having a TFT of stable characteristics. The concrete measure is as follows. A display device including plural pixels, each of the plural pixels having a thin film transistor (TFT) of an oxide semiconductor comprising: a width of the oxide semiconductor in the channel width direction is wider than a width of the gate electrode in the channel width direction.
    Type: Grant
    Filed: August 4, 2021
    Date of Patent: March 19, 2024
    Assignee: Japan Display Inc.
    Inventors: Takeshi Sakai, Yuichiro Hanyu, Masahiro Watabe
  • Patent number: 11935881
    Abstract: According to an aspect, a display apparatus includes: a substrate; a plurality of pixels arrayed on the substrate; a plurality of inorganic light-emitting elements that are provided in the pixels, respectively; a transistor provided to a first surface of the substrate and coupled to one of the inorganic light-emitting elements; wiring provided to the first surface of the substrate and coupled to the transistor; and a circular polarization plate provided on a first side of the substrate.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: March 19, 2024
    Assignee: Japan Display Inc.
    Inventors: Masanobu Ikeda, Yasuhiro Kanaya, Tadafumi Ozaki
  • Patent number: 11934061
    Abstract: A performance of a display apparatus is improved. A display apparatus includes a glass plate, a display panel facing the glass plate, a frame housing a part of the glass plate and a part of the display panel, and a light source module housed in the frame. The glass plate has a side surface. The display panel includes a first substrate facing the glass plate, a second substrate facing the first substrate, and a liquid crystal layer located between the first substrate and the second substrate. The light source module is disposed at a position facing the side surface of the glass plate.
    Type: Grant
    Filed: August 9, 2022
    Date of Patent: March 19, 2024
    Assignee: JAPAN DISPLAY INC.
    Inventor: Makoto Miyao
  • Patent number: 11934082
    Abstract: According to one embodiment, a light control device includes a first substrate including a plurality of first control electrodes disposed in an effective area, and a plurality of feed lines disposed in a peripheral area, a second substrate, and a first liquid crystal layer. The first control electrodes are transparent electrodes. Each of the first control electrodes includes, in the effective area, first segments crossing a first direction at a first angle, second segments crossing the first direction at a second angle, and third segments crossing the first direction at a third angle. The first control electrode is electrically connected to the feed line. The first to third angles are different from each other.
    Type: Grant
    Filed: April 15, 2022
    Date of Patent: March 19, 2024
    Assignee: Japan Display Inc.
    Inventors: Takeo Koito, Masashi Mitsui, Tae Kurokawa
  • Patent number: 11934057
    Abstract: According to one embodiment, a display device includes a first substrate, a second substrate, a liquid crystal layer including polymers and liquid crystal molecules, and a light-emitting element. The first substrate includes a transparent substrate, a scanning line, a signal line crossing the scanning line, a switching element electrically connected to the scanning line and the signal line, an organic insulating film overlapping the switching element, and a pixel electrode electrically connected to the switching element. A thickness of the organic insulating film located between the transparent substrate and the pixel electrode is less than a thickness of the organic insulating film overlapping the switching element.
    Type: Grant
    Filed: December 12, 2022
    Date of Patent: March 19, 2024
    Assignee: Japan Display Inc.
    Inventors: Kentaro Okuyama, Yoshihide Ohue, Hiroki Sugiyama, Tomoyuki Tada
  • Patent number: 11935497
    Abstract: According to an aspect, a display device includes: a first panel including pixels; a second panel including light control pixels; and a light source. When any of the pixels is controlled to transmit light in accordance with an input image signal, blurring processing is applied, a blurring area is formed, and light from the light source transmits through the blurring area and the pixel controlled to transmit light and is emitted from the first panel. When a straight line connecting a user viewpoint and the pixel controlled to transmit light has an angle relative to a normal to the first panel, a center of the blurring area is at a position shifted to a side opposite to a reference normal side relative to the normal to the first panel passing through a center of the pixel. The reference normal is a normal to the first panel passing through the viewpoint.
    Type: Grant
    Filed: October 4, 2022
    Date of Patent: March 19, 2024
    Assignee: Japan Display Inc.
    Inventors: Tomoyuki Ishihara, Tsutomu Harada
  • Patent number: 11934071
    Abstract: According to one embodiment, an electronic device includes a display panel and an image sensor element, the display panel includes a first area that does not overlap the image sensor element and a second area that overlaps the image sensor element, the display panel includes a first electrode, a second electrode that overlaps the first electrode, and a liquid crystal layer, the second electrode includes a plurality of first slits provided in the first area and a plurality of second slits provided in the second area, the second electrode includes a plurality of first slits provided in the first area and a plurality of second slits provided in the second area, the plurality of second slits are arranged based on a Fibonacci sequence.
    Type: Grant
    Filed: August 2, 2023
    Date of Patent: March 19, 2024
    Assignee: Japan Display Inc.
    Inventors: Kazuhide Mochizuki, Yoshiro Aoki
  • Patent number: 11934074
    Abstract: A display device includes a liquid crystal layer between a first substrate and a second substrate. The first substrate includes a wiring line and a pixel electrode. The liquid crystal layer includes a stripe-shaped polymer extending in a first direction and a liquid crystal molecule. The liquid crystal layer includes a first polymer in an area overlapping the wiring line and a second polymer in an area overlapping the pixel electrode. The first polymer includes a first portion extending in a direction different from the first direction. The second polymer includes a second portion extending in a direction different from the first direction. A density of the first portion is higher than a density of the second portion.
    Type: Grant
    Filed: June 8, 2023
    Date of Patent: March 19, 2024
    Assignee: Japan Display Inc.
    Inventors: Kojiro Ikeda, Kentaro Okuyama, Tenfu Nakamura
  • Patent number: 11934001
    Abstract: A lighting device including: a light guide, a reflecting sheet and a first prism sheet, in which a first white LED, a second white LED and a third white LED are disposed in a same interval on a first side surface and on a second side surface, which opposes to the first side surface, a first prism array extending in a first direction and arranged in a second direction is formed on the major surface, a second prism array extending in a second direction and arranged in a first direction is formed on the back surface, the reflecting sheet is disposed under the back surface of the light guide, the first prism sheet is disposed on the major surface of the light guide, and a third prism array, extending in the second direction and arranged in the first direction is formed on the back surface of the first prism sheet.
    Type: Grant
    Filed: September 28, 2022
    Date of Patent: March 19, 2024
    Assignee: JAPAN DISPLAY INC.
    Inventors: Makoto Hasegawa, Nobuyuki Suzuki