Patents by Inventor Norifumi Kajimoto

Norifumi Kajimoto 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: 11977222
    Abstract: An image display apparatus includes an image display element, and an eyepiece optical system configured to guide light from the image display element to an exit pupil. The eyepiece optical system includes at least one correction element having different characteristics between a central area and a peripheral area different from the central area. When first light is light emitted from a central portion of the image display element, and second light is light emitted from an outermost peripheral portion of the image display element, the characteristics of the at least one correction element are set such that color drift of the second light after pass through the peripheral area from the first light after pass through the central area is less than color drift of the second light before pass through the peripheral area from the first light before pass through the central area.
    Type: Grant
    Filed: November 14, 2022
    Date of Patent: May 7, 2024
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masakazu Tohara, Norifumi Kajimoto, Ryoji Kondo
  • 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: 20240032406
    Abstract: The present disclosure provides an apparatus including a display element including a plurality of light-emitting elements disposed two-dimensionally on a plane and a plurality of microlenses provided for corresponding ones of the plurality of light-emitting elements, and an ocular optical system, containing at least one reflective surface therein, that guides light from a display surface of the display element to an exit pupil, wherein in a peripheral part of the display element, a center position of the light emission region of each light-emitting element and a center of the microlens corresponding to the light-emitting element are shifted from each other in a direction parallel to the plane.
    Type: Application
    Filed: September 29, 2023
    Publication date: January 25, 2024
    Inventors: NORIFUMI KAJIMOTO, MASAKAZU TOHARA, HIROAKI SANO, YOJIRO MATSUDA
  • 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: 20230320122
    Abstract: The present disclosure provides an organic light-emitting element including a first electrode, an organic compound layer, and a second electrode, wherein the organic compound layer includes a charge transport layer, and the charge transport layer includes a first charge transport layer, a second charge transport layer, and a third charge transport layer in this order, and the first charge transport layer, the second charge transport layer, and the third charge transport layer satisfy Formulas (1) and (2) below: ?1>?2>?3??(1) d1+d2<d3??(2) in Formula (1), ?1, ?2, and ?3 are charge mobilities of the first to third charge transport layers, and in Formula (2), d1, d2, and d3 are layer thicknesses of the first to third charge transport layers.
    Type: Application
    Filed: March 27, 2023
    Publication date: October 5, 2023
    Inventors: TAKAYUKI ITO, KENTARO ITO, NORIFUMI KAJIMOTO, YOJIRO MATSUDA, HIROAKI SANO
  • Patent number: 11758744
    Abstract: An organic device comprising first and second conductive line, an insulator arranged above the first and second conductive lines, a first electrode arranged above the insulator, an organic layer arranged above the first electrode, a second electrode arranged above the organic layer, a first via including a first conductor connecting the first conductive line and the first electrode, and a second via including a second conductor connecting the second conductive line and the second electrode, is provided. An upper portion of the first via is filled with the first conductor. An upper portion of the second via includes a region which is not filled with the second conductor and covered by the second conductor. An inner wall of the second conductor along the second via includes a region without the organic layer in contact with the second electrode.
    Type: Grant
    Filed: June 25, 2021
    Date of Patent: September 12, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tetsuo Takahashi, Norifumi Kajimoto
  • Publication number: 20230217791
    Abstract: A light emitting apparatus including a substrate including a principal surface, a first light emitting element disposed on the principal surface, a second light emitting element disposed on the principal surface, a first lens and a second lens wherein a distance between a middle point of an emission area of the second light emitting element and an apex of the second lens is larger than a distance between a middle point of an emission area of the first light emitting element and an apex of the first lens, wherein the emission area of the second light emitting element is larger than the emission area of the first light emitting element, and wherein the lower electrode of the second light emitting element is larger than the lower electrode of the first light emitting element.
    Type: Application
    Filed: March 10, 2023
    Publication date: July 6, 2023
    Inventors: NORIFUMI KAJIMOTO, HIROAKI SANO, YOJIRO MATSUDA, TETSUO TAKAHASHI
  • Publication number: 20230189555
    Abstract: A light emitting device in which a reflective film, a first electrode, an organic film including a light emitting layer, a second electrode, and an optical member are arranged in this order on a principal surface of a substrate and a bank configured to cover a peripheral portion of the first electrode is provided to define a light emitting region. The reflective film, the first electrode, the organic film, and the second electrode form a resonator structure configured to resonate, between the reflective film and the second electrode, light generated in the organic film. In the light emitting region, an upper surface of the reflective film is flatter than the first electrode. The resonator structure has a plurality of different optical path lengths.
    Type: Application
    Filed: December 8, 2022
    Publication date: June 15, 2023
    Inventors: TAKAYUKI ITO, NORIFUMI KAJIMOTO, HIROAKI SANO, TASUKU KANEDA, YOJIRO MATSUDA, AKIRA OKITA
  • 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
  • Publication number: 20230152577
    Abstract: An image display apparatus includes an image display element, and an eyepiece optical system configured to guide light from the image display element to an exit pupil. The eyepiece optical system includes at least one correction element having different characteristics between a central area and a peripheral area different from the central area. When first light is light emitted from a central portion of the image display element, and second light is light emitted from an outermost peripheral portion of the image display element, the characteristics of the at least one correction element are set such that color drift of the second light after pass through the peripheral area from the first light after pass through the central area is less than color drift of the second light before pass through the peripheral area from the first light before pass through the central area.
    Type: Application
    Filed: November 14, 2022
    Publication date: May 18, 2023
    Inventors: Masakazu Tohara, Norifumi Kajimoto, Ryoji Kondo
  • Patent number: 11545647
    Abstract: A light-emitting apparatus includes an insulating layer including a light-emitting region including a light-emitting element, and a groove provided in the insulating layer. The groove is provided in a portion between the light-emitting region and an end of the insulating layer, and has a zigzag pattern or a wrapping pattern.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: January 3, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Norifumi Kajimoto
  • Publication number: 20220359849
    Abstract: An organic device comprising a reflective electrode, an organic layer arranged on the reflective electrode, a semi-transmissive electrode arranged on the organic layer and a reflection surface formed above the semi-transmissive electrode is provided. The organic layer emits white light and includes a blue-emitting layer. An optical distance L of the organic layer satisfies L?[{(?r+?s)/?}×(?b/4)]×1.2, where ?b is a peak wavelength of the blue-emitting layer, ?r and ?s are a phase shift of the wavelength ?b in the reflective electrode and the semi-transmissive electrode, respectively. A resonant wavelength of an optical distance between the semi-transmissive electrode and the reflection surface is shorter than the wavelength ?b.
    Type: Application
    Filed: July 15, 2022
    Publication date: November 10, 2022
    Inventors: Norifumi Kajimoto, Takayuki Ito
  • 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
  • Patent number: 11430970
    Abstract: An organic device comprising a reflective electrode, an organic layer arranged on the reflective electrode, a semi-transmissive electrode arranged on the organic layer and a reflection surface formed above the semi-transmissive electrode is provided. The organic layer emits white light and includes a blue-emitting layer. An optical distance L of the organic layer satisfies L?[{(?r+?s)/?}×(?b/4)]×1.2, where ?b is a peak wavelength of the blue-emitting layer, ?r and ?s are a phase shift of the wavelength ?b in the reflective electrode and the semi-transmissive electrode, respectively. A resonant wavelength of an optical distance between the semi-transmissive electrode and the reflection surface is shorter than the wavelength ?b.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: August 30, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Norifumi Kajimoto, Takayuki Ito
  • 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: 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: 20220013583
    Abstract: An organic device comprising first and second conductive line, an insulator arranged above the first and second conductive lines, a first electrode arranged above the insulator, an organic layer arranged above the first electrode, a second electrode arranged above the organic layer, a first via including a first conductor connecting the first conductive line and the first electrode, and a second via including a second conductor connecting the second conductive line and the second electrode, is provided. An upper portion of the first via is filled with the first conductor. An upper portion of the second via includes a region which is not filled with the second conductor and covered by the second conductor. An inner wall of the second conductor along the second via includes a region without the organic layer in contact with the second electrode.
    Type: Application
    Filed: June 25, 2021
    Publication date: January 13, 2022
    Inventors: Tetsuo Takahashi, Norifumi Kajimoto