Patents by Inventor Koji Ishizuya

Koji Ishizuya 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: 20240065078
    Abstract: The present disclosure provides a light-emitting apparatus including an insulating layer, a light-emitting element disposed on a main surface of the insulating layer, the light-emitting element containing a light-emitting material and having a resonator structure, and a lens disposed above the light-emitting element, a photoluminescence (PL) spectrum of the light-emitting material having a first peak with a wavelength ?PL in a visible light range, wherein the resonator structure satisfies Exp. (1), |?EL??PL|<|?on??PL|??(1) where ?on is a resonance peak wavelength of an interference spectrum that reinforces light emitted in a direction perpendicular to the main surface and ?EL is a peak wavelength of electroluminescence radiated via the light extracting structure.
    Type: Application
    Filed: October 13, 2023
    Publication date: February 22, 2024
    Inventors: NORIFUMI KAJIMOTO, KOJI ISHIZUYA, TAKAYUKI ITO, HIROAKI SANO, TETSUO TAKAHASHI, YOJIRO MATSUDA
  • Publication number: 20240057455
    Abstract: A light emitting apparatus according to the present disclosure includes an organic light emitting element (100) including a reflection surface (S2), a first electrode (2), an organic layer (3) including a light emitting layer (31), a second electrode (4), and a light extraction structure (10). The light emitting layer (31) contains a first light emitting material. A wavelength included in a peak wavelength range of a PL spectrum of the first light emitting material is assumed as a first wavelength ?1. An optical distance (Lb) between the light emitting layer (31) and the reflection surface (S2) is a value with which rays of light with the first wavelength (?1), traveling in a first direction (D1) and a second direction (D2) that intersect with a normal direction of a principal surface (S1) of the substrate (1), both are intensified.
    Type: Application
    Filed: October 10, 2023
    Publication date: February 15, 2024
    Inventors: KOJI ISHIZUYA, NORIFUMI KAJIMOTO, YOJIRO MATSUDA, HIROAKI SANO, TAKAYUKI ITO, TETSUO TAKAHASHI
  • Publication number: 20240049553
    Abstract: Display device has display region of pixels including first pixel arranged in central portion of the display region and second pixel arranged between the first pixel and the edge of the display region. Each pixel includes first and second light emitting elements. Color filter layer is arranged on the first and second light emitting elements. The first light emitting element includes first color filter, and opening of the first light emitting element is defined by the color filter layer. The second light emitting element includes second color filter and having spectral transmittance characteristic different from the first color filter. Ratio of size of the opening to size of light emitting region of the first light emitting element is smaller in the second pixel than in the first pixel.
    Type: Application
    Filed: October 12, 2023
    Publication date: February 8, 2024
    Inventor: Koji Ishizuya
  • Patent number: 11825722
    Abstract: Display device has display region of pixels including first pixel arranged in central portion of the display region and second pixel arranged between the first pixel and the edge of the display region. Each pixel includes first and second light emitting elements. Color filter layer is arranged on the first and second light emitting elements. The first light emitting element includes first color filter, and opening of the first light emitting element is defined by the color filter layer. The second light emitting element includes second color filter and having spectral transmittance characteristic different from the first color filter. Ratio of size of the opening to size of light emitting region of the first light emitting element is smaller in the second pixel than in the first pixel.
    Type: Grant
    Filed: March 11, 2021
    Date of Patent: November 21, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koji Ishizuya
  • Patent number: 11818936
    Abstract: A display device is provided that has pixels including a first pixel and a second pixel arranged to be adjacent to each other along a first direction. The pixels include a light emitting region and a color filter. Luminous efficacy of the first pixel is higher than that of the second pixel. In a plane view, a center position of each color filter is shifted in the first direction from a center position of a corresponding light emitting region, and a length parallel to the first direction of the color filter of the first pixel is longer than that of the second pixel. In the first direction, each first pixel is periodically arranged and a pitch of the color filter of each first pixel and a pitch of the light emitting region of each first pixel are different from each other.
    Type: Grant
    Filed: October 4, 2021
    Date of Patent: November 14, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koji Ishizuya, Norifumi Kajimoto, Yojiro Matsuda
  • Publication number: 20230354651
    Abstract: A light emitting device includes a plurality of first electrodes, an organic layer located above the plurality of first electrodes and including a light emitting layer, a second electrode located above the organic layer, and an insulating layer that separates the plurality of first electrodes from each other. An upper surface of each of the plurality of first electrodes includes an inner region in contact with the organic layer, and an outer region in contact with the insulating layer. The insulating layer includes an opening that defines the inner region, and a step located at a position away from the opening and overlapping the outer region.
    Type: Application
    Filed: April 20, 2023
    Publication date: November 2, 2023
    Inventors: YOSHIAKI TAGUCHI, KOJI ISHIZUYA, MASAHIKO SONE, AKINORI MAKAINO, TOSHIHIRO SHOYAMA, KENTARO SUZUKI
  • Publication number: 20230345789
    Abstract: A light emitting apparatus having sub-pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel. One sub-pixel of the first sub-pixel, the second sub-pixel, and the third sub-pixel is adjacent to the remaining two sub-pixels. Each sub-pixel includes a lower electrode, a bank including an opening that exposes a center portion of the lower electrode, an organic compound layer arranged to cover the lower electrode and the bank and including a light emitting layer, and an upper electrode arranged on the organic compound layer. The bank of the first sub-pixel includes a first separation structure that at least partially surrounds the opening arranged on the lower electrode of the first sub-pixel. The bank of the third sub-pixel does not include a separation structure arranged to surround the opening of the third sub-pixel.
    Type: Application
    Filed: April 7, 2023
    Publication date: October 26, 2023
    Inventors: HIROAKI SANO, YOJIRO MATSUDA, KOJI ISHIZUYA
  • Patent number: 11672171
    Abstract: A light-emitting device includes a plurality of organic EL elements. Each of the organic EL elements includes a reflection electrode, a hole transport region, an electron-trapping luminescent layer, and a light extraction electrode in this order. The hole transport region has a sheet resistance of 4.0×107 ?/sq.? or more at a current of 0.1 nA/pixel, and the total thickness of the hole transport region and the electron-trapping luminescent layer is equivalent to an optical path length enabling emission from the electron-trapping luminescent layer to be enhanced.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: June 6, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Norifumi Kajimoto, Tetsuo Takahashi, Koji Ishizuya, Itaru Takaya, Hirokazu Miyashita, Takayuki Ito, Hiroaki Sano
  • Patent number: 11527579
    Abstract: A display device according to an embodiment of the present invention includes first and second electroluminescent elements on a substrate. The first and second electroluminescent elements each include a lower electrode, a functional layer including a light-emitting layer, an upper electrode, and a first or second color filter. The display device includes an overlapping region where the first and second color filters overlap each other in a plan view. Light transmitted through the first color filter has a higher luminosity factor than light transmitted through the second color filter. L2>L1, wherein L2 is the distance between the light-emitting region of the second electroluminescent element and the second color filter, and L1 is the distance between the light-emitting region of the first electroluminescent element and the first color filter.
    Type: Grant
    Filed: October 8, 2020
    Date of Patent: December 13, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koji Ishizuya, Tetsuo Takahashi
  • Patent number: 11502276
    Abstract: An organic electroluminescent element includes a first electrode, a second electrode, and an organic compound layer disposed between the first and second electrodes. A protective layer and a planarization layer are disposed in this order on the light emission side of whichever of the first and second electrodes is closer to the light emission side. A surface of the protective layer adjacent to the planarization layer has an uneven shape. The planarization layer is in contact with the protective layer. A surface of the planarization layer away from the protective layer is flat. The refractive index of the planarization layer is equal to or lower than that of the protective layer and equal to or higher than that of a light emission medium in contact with the planarization layer.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: November 15, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koji Ishizuya, Hiroaki Sano
  • Publication number: 20220320452
    Abstract: A light-emitting apparatus including: a first lower electrode; a second lower electrode; a functional layer covering the first lower electrode and the second lower electrode; and an upper electrode on the functional layer, the light-emitting apparatus further including a third lower electrode between the first lower electrode and the second lower electrode, wherein the third lower electrode has an inclined portion inclined with respect to an upper surface of the first lower electrode, and the third lower electrode, an insulating layer, the functional layer, and the upper electrode are arranged in this order in a direction perpendicular to the inclined portion.
    Type: Application
    Filed: March 24, 2022
    Publication date: October 6, 2022
    Inventors: Norifumi Kajimoto, Koji Ishizuya, Yojiro Matsuda
  • Publication number: 20220310966
    Abstract: The present disclosure provides an electronic device including a plurality of first electrodes, a second electrode, a functional layer disposed between each first electrode and the second electrode, and an insulating layer having a slope portion on the first electrode, wherein the functional layer is continuously disposed so as to cover the first electrode, a neighboring first electrode, and the insulating layer covering the first electrode and the neighboring first electrode, the functional layer on the first electrode has a layer thickness smaller than a height from an upper surface of the first electrode to an upper surface of the insulating layer, and the functional layer on the slope portion of the insulating layer has a layer thickness of 20 nm or more in a direction perpendicular to a slope surface of the slope portion.
    Type: Application
    Filed: June 6, 2022
    Publication date: September 29, 2022
    Inventors: Tetsuo Takahashi, Norifumi Kajimoto, Koji Ishizuya, Hiroaki Sano, Hiroyuki Mochizuki
  • Publication number: 20220255042
    Abstract: An organic device includes a reflective film arranged on a substrate, a plurality of lower electrodes arranged above the reflective film, an organic function film configured to cover the plurality of lower electrodes, and an upper electrode arranged on the organic function film. A potential difference between the upper electrode and the reflective film is lower than a threshold voltage at which the organic function film operates.
    Type: Application
    Filed: April 27, 2022
    Publication date: August 11, 2022
    Inventors: Hiroaki Naruse, Koji Ishizuya, Yojiro Matsuda, Takayuki Ito, Hiroaki Sano
  • Patent number: 11393879
    Abstract: A light-emitting device comprising first and second light-emitting elements in a display region, and first and second dummy elements in a dummy region is provided. Each of the light-emitting elements, and the dummy elements includes a reflector arranged, a first electrode arranged above the reflector, a light-emitting layer arranged above the first electrode, and a second electrode arranged above the light-emitting layer. A difference between a distance from the reflector to the light-emitting layer in the first light-emitting element and a distance from the reflector to the light-emitting layer in the second light-emitting element is larger than a difference between a distance from the reflector to the light-emitting layer in the first dummy element and a distance from the reflector to the light-emitting layer in the second dummy element.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: July 19, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroaki Sano, Koji Ishizuya
  • Patent number: 11380864
    Abstract: The present disclosure provides an electronic device including a plurality of first electrodes, a second electrode, a functional layer disposed between each first electrode and the second electrode, and an insulating layer having a slope portion on the first electrode, wherein the functional layer is continuously disposed so as to cover the first electrode, a neighboring first electrode, and the insulating layer covering the first electrode and the neighboring first electrode, the functional layer on the first electrode has a layer thickness smaller than a height from an upper surface of the first electrode to an upper surface of the insulating layer, and the functional layer on the slope portion of the insulating layer has a layer thickness of 20 nm or more in a direction perpendicular to a slope surface of the slope portion.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: July 5, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuo Takahashi, Norifumi Kajimoto, Koji Ishizuya, Hiroaki Sano, Hiroyuki Mochizuki
  • Patent number: 11322555
    Abstract: The present invention provides a light-emitting device including a substrate, a first EL element, and a second EL element, the first EL element and the second EL element each including a lower electrode, an organic compound layer including a light-emitting layer, an upper electrode, and a color filter in this order from the substrate, and an insulating layer that covers an end portion of the lower electrode. A first color filter of the first EL element and a second color filter of the second EL element overlap each other when viewed in plan in an overlapping region, and an inclined portion closest to the first EL element among inclined portions of the insulating layer of the second EL element and the overlapping region overlap each other when viewed in plan.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: May 3, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuo Takahashi, Koji Ishizuya, Norifumi Kajimoto, Hiroaki Sano, Akira Okita, Etsuro Kishi, Masaki Kurihara, Daisuke Shimoyama
  • Publication number: 20220131110
    Abstract: The light-emitting device has: a display region; a peripheral region; a first light-emitting element having a light-emitting region in which a lower electrode, a light-emitting layer, and an upper electrode are laminated; a first laminated section, between the substrate and the lower electrode of the first light-emitting element, in which there are laminated a first high-reflection layer and a first low-reflection layer that has a lower reflectance than the first high-reflection layer; a peripheral laminated section, in the peripheral region, in which there are laminated on the substrate; a peripheral lamination layer in which a peripheral high-reflection layer and a peripheral low-reflection layer that has a lower reflectance than the peripheral high-reflection layer are laminated. For at least a portion of the first laminated section that overlaps in plan view with the light-emitting region, the first low-reflection layer has an opening such that the first high-reflection layer is exposed.
    Type: Application
    Filed: October 21, 2021
    Publication date: April 28, 2022
    Inventors: Koji Ishizuya, Hiroaki Sano
  • Publication number: 20220131112
    Abstract: A light-emitting device includes: a substrate; a lens; and a light-emitting part provided between the substrate and the lens, wherein the lens has a convex curved surface portion on an opposite side to the substrate, in a first direction perpendicular to the substrate, the light-emitting part is more distant from the lens than a curvature center of the curved surface portion, when an apex of the curved surface portion in the first direction is referred to as a first position, and an end of the curved surface portion in a second direction in parallel with the substrate is referred to as a second position, and h represents a distance from the first position to the second position in the first direction, and r represents a distance from the first position to the second position in the second direction, h/r<0.95 is satisfied.
    Type: Application
    Filed: October 7, 2021
    Publication date: April 28, 2022
    Inventors: Shoma Hinata, Hiroaki Sano, Koji Ishizuya, Yojiro Matsuda
  • Publication number: 20220115447
    Abstract: A display device that comprises pixels including a first pixel and a second pixel arranged to be adjacent to each other along a first direction is provided. The pixels comprises a light emitting region and a color filter. Luminous efficacy of the first pixel is higher than that of the second pixel. In plane view, a center position of each color filter is shifted in the first direction from a center position of a corresponding light emitting region, and a length parallel to the first direction of the color filter of the first pixel is longer than that of the second pixel. In the first direction, each first pixel is periodically arranged and a pitch of the color filter of each first pixel and a pitch of the light emitting region of each first pixel are different from each other.
    Type: Application
    Filed: October 4, 2021
    Publication date: April 14, 2022
    Inventors: Koji Ishizuya, Norifumi Kajimoto, Yojiro Matsuda
  • Publication number: 20210305323
    Abstract: Display device has display region of pixels including first pixel arranged in central portion of the display region and second pixel arranged between the first pixel and the edge of the display region. Each pixel includes first and second light emitting elements. Color filter layer is arranged on the first and second light emitting elements. The first light emitting element includes first color filter, and opening of the first light emitting element is defined by the color filter layer. The second light emitting element includes second color filter and having spectral transmittance characteristic different from the first color filter. Ratio of size of the opening to size of light emitting region of the first light emitting element is smaller in the second pixel than in the first pixel.
    Type: Application
    Filed: March 11, 2021
    Publication date: September 30, 2021
    Inventor: Koji Ishizuya