Patents by Inventor Masanobu Ikeda

Masanobu Ikeda 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: 20250146940
    Abstract: Disclosed is a method for inspecting a light-emitting element, the method including: forming a buffer layer over an amorphous substrate; forming, over the buffer layer, an n-type cladding layer, an emission layer, and a p-type cladding layer each including an inorganic semiconductor to form a plurality of semiconductor layers arranged in a matrix form having a plurality of rows and a plurality of columns; forming an anode and a cathode over each of the plurality of semiconductor layers to form a plurality of light-emitting elements; and acquiring at least one of a photoluminescence property or an electroluminescence property of the plurality of light-emitting elements using a first detector and a second detector. The buffer layer has a function to promote crystallization of the semiconductor layers. The photoluminescence property is acquired before forming the anode and the cathode. The electroluminescence property is acquired after forming the anode and the cathode.
    Type: Application
    Filed: January 9, 2025
    Publication date: May 8, 2025
    Applicant: Japan Display Inc.
    Inventor: Masanobu IKEDA
  • Publication number: 20250146127
    Abstract: A film formation apparatus includes a vacuum chamber, a substrate support portion for supporting a substrate, a target support portion for supporting a target containing nitrogen and gallium, a sputtering gas supply unit for supplying a sputtering gas, a sputtering power source for applying a voltage to the target, a first radical supply source for supplying nitrogen radicals and hydrogen radicals, and a control unit. The control unit controls the sputtering gas supply unit, the sputtering power source, and the first radical supply source so that a first period in which the sputtering gas, the nitrogen radicals, and the hydrogen radicals are supplied to the vacuum chamber and a voltage is applied to the target and a second period in which the nitrogen radicals and the hydrogen radicals are not supplied to the vacuum chamber and a voltage is applied to the target are repeated.
    Type: Application
    Filed: January 13, 2025
    Publication date: May 8, 2025
    Applicant: Japan Display Inc.
    Inventor: Masanobu IKEDA
  • Publication number: 20250146125
    Abstract: A film formation apparatus includes a vacuum chamber, a substrate support portion and a target support portion provided in the vacuum chamber, a sputtering gas supply unit for supplying a sputtering gas to the vacuum chamber, a sputtering power supply, a first radical supply source connected to the vacuum chamber and configured to be capable of supplying at least one of nitrogen radicals generated from an N2 gas and hydrogen radicals generated from an H2 gas to the vacuum chamber, a second radical supply source connected to the vacuum chamber and configured to be capable of supplying SiH3 radicals to the vacuum chamber, and a control unit configured to control the sputtering gas supply unit, the sputtering power supply, the first radical supply source, and the second radical supply source.
    Type: Application
    Filed: January 13, 2025
    Publication date: May 8, 2025
    Applicant: Japan Display Inc.
    Inventors: Masanobu IKEDA, Masumi NISHIMURA
  • Publication number: 20250143053
    Abstract: A display device includes a substrate; a plurality of pixels provided on the substrate; and a plurality of inorganic light emitting elements provided on each of the pixels. The inorganic light emitting elements each include a semiconductor substrate having a first face facing the substrate and a second face provided in a convex shape on a side opposite from the first face; and a plurality of semiconductor nanowires provided on the first face, the semiconductor nanowires extending in a direction perpendicular to the first face.
    Type: Application
    Filed: December 30, 2024
    Publication date: May 1, 2025
    Inventors: Masanobu IKEDA, Hidemasa YAMAGUCHI
  • Patent number: 12288508
    Abstract: A display apparatus with a detecting device includes a substrate, a plurality of pixels provided to the substrate, an inorganic light emitting element provided to each of the pixels, a plurality of detection electrodes arranged in a first direction parallel to the substrate, and a plurality of drive electrodes arranged in a second direction intersecting the first direction and provided intersecting the detection electrodes in planar view seen from a direction perpendicular to the substrate. The detection electrodes each includes a plurality of first linear parts, a plurality of second linear parts extending in a direction intersecting the first linear parts, and a bent part that couples the first linear part and the second linear part, the first linear parts and the second linear parts are metal thin wires, and the drive electrodes are translucent electric conductors.
    Type: Grant
    Filed: January 16, 2024
    Date of Patent: April 29, 2025
    Assignee: Japan Display Inc.
    Inventors: Masanobu Ikeda, Yasuhiro Kanaya
  • Patent number: 12288777
    Abstract: A display device includes a first planarization film including an opening, a reflective film provided on an inclined surface inside the opening in the first planarization film, an LED chip surrounded by the reflective film and provided inside the opening, and a second planarization film provided on the first planarization film, surrounding the LED chip, and filling the opening, wherein a height from an upper end of the inclined surface of the first planarization film to an interface with air in the second planarization film is 20 ?m or less.
    Type: Grant
    Filed: July 11, 2022
    Date of Patent: April 29, 2025
    Assignee: JAPAN DISPLAY INC.
    Inventors: Yoshinori Tanaka, Jin Hirosawa, Masanobu Ikeda
  • Patent number: 12283583
    Abstract: A display device includes a substrate, a plurality of pixels provided to the substrate, a plurality of mounting electrodes and a plurality of light-emitting elements provided to the pixels, a first region provided at a center part of a display region of the substrate, and a second region provided closer to an outer end of the substrate than the first region in the display region of the substrate. Number of the mounting electrodes included in each of the pixels in the first region is equal to number of the mounting electrodes included in each of the pixels in the second region, and number of the light-emitting elements included in each of the pixels in the first region is larger than number of the light-emitting elements included in each of the pixels in the second region.
    Type: Grant
    Filed: June 15, 2022
    Date of Patent: April 22, 2025
    Assignee: Japan Display Inc.
    Inventor: Masanobu Ikeda
  • Patent number: 12283579
    Abstract: A display device includes a display region in which a plurality of pixel portions is arranged in a matrix on a substrate, each of the plurality of pixel portions including an LED chip, a transistor, and a capacitor. Through the transistor, a first electrode of the LED chip is connected to a first wiring to which one of power supply voltages is supplied. A second electrode of the LED chip is connected to a second wiring to which another of the power supply voltages is supplied. A first electrode of the capacitor is connected to the first electrode of the LED chip. The plurality of pixel portions includes at least one first pixel portion which is located on an outermost periphery of the display region and at least one second pixel portion which is not located on the outermost periphery of the display region.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: April 22, 2025
    Assignee: JAPAN DISPLAY INC.
    Inventors: Yoshinori Aoki, Masanobu Ikeda
  • Patent number: 12278294
    Abstract: A photo detecting device comprising: a substrate; a plurality of photoelectric conversion elements provided to the substrate and configured to output a detection signal corresponding to light with which the photoelectric conversion elements are irradiated; at least one or more light emitting elements provided to the substrate; and a control circuit configured to set a wavelength of light output from the light emitting element by controlling an electric current flowing through the light emitting element.
    Type: Grant
    Filed: February 11, 2022
    Date of Patent: April 15, 2025
    Assignee: Japan Display Inc.
    Inventors: Masanobu Ikeda, Yasuhiro Kanaya
  • Patent number: 12272723
    Abstract: A display apparatus is provided and includes substrate; pixels disposed on substrate; inorganic light emitting elements that are provided in pixels, respectively; electrode that is translucent and provided on one surface side of substrate and that is coupled to one of inorganic light emitting elements; transparent resin layer that is provided on one surface side of substrate and that covers electrode; light-shielding conductive layer that is provided on one surface side of substrate and that is in contact with transparent resin layer; and cover member that is translucent and provided on one surface side of substrate and that covers transparent resin layer, wherein substrate includes display region in which pixels are located, and peripheral region located outside display region, and light-shielding conductive layer is located in peripheral region.
    Type: Grant
    Filed: April 4, 2023
    Date of Patent: April 8, 2025
    Assignee: Japan Display Inc.
    Inventors: Masanobu Ikeda, Yasuhiro Kanaya
  • Publication number: 20250096216
    Abstract: According to one embodiment, a display device includes pixels each including transistors, pixel electrodes, a contact electrode, and light emitting elements, and an insulating basement, a first organic insulating layer, a second organic insulating layer, a resin layer, a common electrode, and first wiring lines. The common electrode is electrically connected to cathodes of the light emitting elements, and electrically connected to the contact electrodes of the pixels. The first wiring lines, each provided between the first organic insulating layer and the second organic insulating layer or between the second organic insulating layer and the resin layer, are electrically connected to the contact electrodes of the pixels, and are formed of a metal.
    Type: Application
    Filed: December 3, 2024
    Publication date: March 20, 2025
    Inventors: Yoshinori AOKI, Yasuhiro KANAYA, Masanobu IKEDA, Akihiro OGAWA
  • Patent number: 12255192
    Abstract: A display device includes a display portion mounted with a first LED and a second LED are mounted, a pixel circuit portion provided with a first pixel-circuit thin film transistor electrically connected to the first LED and a second pixel-circuit thin film transistor electrically connected to the second LED, a drive circuit portion provided with a drive-circuit thin film transistor, and a shielding layer provided between the display portion and the drive circuit portion. A fixed potential is applied to the shielding layer. The second LED overlaps the drive circuit portion with the shielding layer therebetween.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: March 18, 2025
    Assignee: JAPAN DISPLAY INC.
    Inventors: Masanobu Ikeda, Yoshinori Aoki, Akihiro Ogawa
  • Patent number: 12249676
    Abstract: A display device includes a substrate, a plurality of pixels, a light emitting element, and an inorganic insulating layer. The pixels are provided to the substrate. The light emitting element is provided to each of the pixels. The inorganic insulating layer has translucency and covers at least part of the light emitting element. The inorganic insulating layer includes a side part and an extending part. The side part is provided to the side surface of the light emitting element. The extending part is provided at a side on the lower end of the side part and extending toward the outer side of the light emitting element than the side part in planar view seen from the normal direction of the substrate.
    Type: Grant
    Filed: May 11, 2021
    Date of Patent: March 11, 2025
    Assignee: Japan Display Inc.
    Inventors: Osamu Itou, Masanobu Ikeda, Masataka Ikeda
  • Publication number: 20250079257
    Abstract: A gallium nitride-based semiconductor device includes an amorphous glass substrate having a first surface and a second surface opposite to the first surface; a gallium nitride-based semiconductor layer on the first surface of the amorphous glass substrate, and a compensation layer on the second surface of the amorphous glass substrate. A thermal expansion coefficient of the compensation layer is more than a thermal expansion coefficient of the amorphous glass substrate and less than a thermal expansion coefficient of the gallium nitride-based semiconductor layer.
    Type: Application
    Filed: November 18, 2024
    Publication date: March 6, 2025
    Applicant: Japan Display Inc.
    Inventors: Masanobu IKEDA, Masumi NISHIMURA
  • Publication number: 20250066901
    Abstract: A film formation method of a gallium nitride film according to an embodiment of the present invention includes the steps of placing a substrate so as to face a target containing nitride and gallium in a vacuum chamber, heating the substrate, supplying a sputtering gas to the vacuum chamber, supplying a nitrogen radical and a hydrogen radical to the vacuum chamber, and applying a voltage to the target to generate a plasma of the sputtering gas. Gallium nitride generated by a recombination reaction between the gallium sputtered from the target and the nitrogen radical, and gallium nitride generated by a recombination reaction between a gallium cation generated from the gallium of the target and a nitrogen anion generated from the nitrogen radical are deposited on the substrate.
    Type: Application
    Filed: November 7, 2024
    Publication date: February 27, 2025
    Applicant: Japan Display Inc.
    Inventor: Masanobu IKEDA
  • Patent number: 12218178
    Abstract: A display device includes a substrate; a plurality of pixels provided on the substrate; and a plurality of inorganic light emitting elements provided on each of the pixels. The inorganic light emitting elements each include a semiconductor substrate having a first face facing the substrate and a second face provided in a convex shape on a side opposite from the first face; and a plurality of semiconductor nanowires provided on the first face, the semiconductor nanowires extending in a direction perpendicular to the first face.
    Type: Grant
    Filed: September 22, 2021
    Date of Patent: February 4, 2025
    Assignee: Japan Display Inc.
    Inventors: Masanobu Ikeda, Hidemasa Yamaguchi
  • Patent number: 12204216
    Abstract: According to one embodiment, a display device includes a display area, a peripheral area, a pixel electrode disposed, a switching element, a scanning line, a signal line, a metal layer which overlaps at least one of the signal line and the scanning line, an antireflection layer which covers the metal layer, a common electrode which covers the antireflection layer and a power supply line disposed in the peripheral area, to which a common voltage is supplied. The common electrode and the metal layer are connected to the power supply line in the peripheral area.
    Type: Grant
    Filed: October 12, 2023
    Date of Patent: January 21, 2025
    Assignee: Japan Display Inc.
    Inventors: Kyosuke Watanabe, Jin Hirosawa, Masanobu Ikeda
  • Patent number: 12183853
    Abstract: An LED module includes a first electrode and a second electrode disposed on the substrate, an LED chip disposed on the first electrode and the second electrode, and a first bump between the LED chip and the first electrode, and a second bump between the LED chip and the second electrode. The LED chip includes a cathode electrode facing the first electrode, an anode electrode facing the second electrode, and a step portion between the cathode electrode and the anode electrode, a distance between the first electrode and the cathode electrode is larger than a distance between the second electrode and the anode electrode, and the first bump is disposed to embed the step portion.
    Type: Grant
    Filed: July 30, 2021
    Date of Patent: December 31, 2024
    Assignee: Japan Display Inc.
    Inventors: Masanobu Ikeda, Yoshinori Aoki, Akihiro Ogawa
  • Publication number: 20240379928
    Abstract: A display device includes a substrate, a plurality of first pixels and a plurality of second pixels provided to the substrate, a plurality of inorganic light emitting elements provided to the respective first pixels and the respective second pixels, a plurality of signal lines configured to supply a signal to the first pixels and the second pixels, and a plurality of power supply lines configured to supply a power supply potential to the first pixels and the second pixels. At least one or more of the signal lines are provided in a layer different from a layer of the power supply lines in the first pixels, and the signal lines and the power supply lines are provided in the same layer in the second pixels.
    Type: Application
    Filed: July 23, 2024
    Publication date: November 14, 2024
    Inventors: Masanobu IKEDA, Osamu ITOU, Yoshinori AOKI
  • Patent number: 12142600
    Abstract: According to one embodiment, a display panel includes a substrate, a first insulating layer, a second insulating layer, and pixels including subpixels of colors. Each of the subpixels includes a drive transistor, a conductive layer, a pixel electrode receiving a signal having a controlled current value from the drive transistor via the conductive layer, and a light-emitting element. Each of the pixels has a mounting electrode overlaid on the conductive layer in each of the subpixels. In a first pixel of the pixels, the mounting electrode is in an electrically floating state.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: November 12, 2024
    Assignee: Japan Display Inc.
    Inventors: Yasuhiro Kanaya, Masanobu Ikeda