Patents by Inventor Keigo HOSHI

Keigo HOSHI 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: 20250204252
    Abstract: A light emitting element including a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode is provided. The emission layer contains a first compound represented by Formula 1.
    Type: Application
    Filed: August 2, 2024
    Publication date: June 19, 2025
    Inventors: Yuji SUZAKI, Keigo HOSHI, Ryuhei FURUE, Yuuki MIYAZAKI
  • Publication number: 20250151616
    Abstract: Provided is a light emitting device including a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode. The emission layer includes at least one polycyclic compound represented by Formula 1 below, and may thus exhibit long life characteristics.
    Type: Application
    Filed: January 9, 2025
    Publication date: May 8, 2025
    Applicant: Samsung Display Co., Ltd.
    Inventors: Keigo HOSHI, Tetsuji HAYANO, Yuuki MIYAZAKI
  • Patent number: 12219871
    Abstract: Provided is a light emitting device including a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode. The emission layer includes at least one polycyclic compound represented by Formula 1 below, and may thus exhibit long life characteristics.
    Type: Grant
    Filed: August 2, 2021
    Date of Patent: February 4, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Keigo Hoshi, Tetsuji Hayano, Yuuki Miyazaki
  • Publication number: 20240284796
    Abstract: A light emitting element including a first electrode, a second electrode facing the first electrode, and a functional layer provided between the first electrode and the second electrode is provided. The functional layer includes a fused polycyclic compound having sterically bulky substituents that may control aggregation and increase intermolecular distances thereby reducing energy transfer and increasing the integrity of the constituent layers of the light emitting element (e.g., a blue light emitting element).
    Type: Application
    Filed: November 7, 2023
    Publication date: August 22, 2024
    Inventors: Hirokazu KUWABARA, Keigo HOSHI, Ryuhei FURUE
  • Publication number: 20240284691
    Abstract: A light emitting element may include a first electrode, a second electrode on the first electrode, and at least one functional layer between the first electrode and the second electrode and including a fused polycyclic compound represented by Formula 1, the fused polycyclic compound including at least one carbazole substituent directly linked to the fused ring core and including at least one cyano group.
    Type: Application
    Filed: November 9, 2023
    Publication date: August 22, 2024
    Inventors: Keigo HOSHI, Hirokazu KUWABARA, Yuji SUZAKI
  • Publication number: 20240284795
    Abstract: Embodiments provide a fused polycyclic compound and a light emitting element that includes the fused polycyclic compound. The light emitting element includes a first electrode, a second electrode disposed on the first electrode, and at least one functional layer disposed between the first electrode and the second electrode, wherein the at least one functional layer includes the fused polycyclic compound. The fused polycyclic compound is represented by Formula 1, which is explained in the specification.
    Type: Application
    Filed: October 10, 2023
    Publication date: August 22, 2024
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hirokazu KUWABARA, Keigo HOSHI, Ryuhei FURUE
  • Patent number: 12069945
    Abstract: A light emitting device of an embodiment includes a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode, wherein the emission layer includes a polycyclic compound represented by Formula 1. Accordingly, the light emitting device of an embodiment may show improved emission efficiency and increased life characteristics.
    Type: Grant
    Filed: June 10, 2021
    Date of Patent: August 20, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Keigo Hoshi
  • Publication number: 20240268229
    Abstract: A light emitting element may include a first electrode, a second electrode on the first electrode, at least one functional layer which is disposed between the first electrode and the second electrode and includes a fused polycyclic compound represented by Formula 1, the fused polycyclic compound including at least one electron-withdrawn group at the meta position with respect to the boron atom in the fused ring core of the fused polycyclic compound.
    Type: Application
    Filed: October 19, 2023
    Publication date: August 8, 2024
    Inventors: Keigo HOSHI, Ryuhei FURUE, Yoshiro SUGITA
  • Publication number: 20240260292
    Abstract: Embodiments provide a light emitting element that includes a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode, wherein the emission layer includes a compound represented by Formula 1, thereby exhibiting long service life characteristics. Formula 1 is explained in the specification.
    Type: Application
    Filed: December 5, 2023
    Publication date: August 1, 2024
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hirokazu KUWABARA, Keigo HOSHI, Ryuhei FURUE
  • Publication number: 20240260467
    Abstract: Embodiments provide a light emitting element that includes a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode. the emission layer includes a polycyclic compound represented by Formula 1, which is explained in the specification.
    Type: Application
    Filed: December 6, 2023
    Publication date: August 1, 2024
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hirokazu KUWABARA, Keigo HOSHI, Ryuhei FURUE
  • Patent number: 11985893
    Abstract: An organic electroluminescence device of an embodiment includes a first electrode, a second electrode, and an emission layer between the first electrode and the second electrode and containing an aromatic compound, wherein the aromatic compound includes a benzene ring, two unsubstituted carbazole groups directly bonded to the benzene ring, two substituted carbazole groups directly bonded to the benzene ring and each substituted with a nitrogen-containing ring group, and a substituent directly bonded to the benzene ring and selected from a cyano group, a fluorine, or a C1-C10 alkyl group substituted with a fluorine. The organic electroluminescence device may obtain good luminous efficiency and long life (long lifespan) characteristics while emitting blue light.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: May 14, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventor: Keigo Hoshi
  • Publication number: 20240138263
    Abstract: A light emitting element of one or more embodiments includes a first electrode, a second electrode oppositely to the first electrode, and an emission layer between the first electrode and the second electrode. The light emitting element of one or more embodiments includes a polycyclic compound represented by a specific chemical structure in the emission layer, thereby showing improved emission efficiency and life characteristics.
    Type: Application
    Filed: September 18, 2023
    Publication date: April 25, 2024
    Inventors: Makoto YAMAMOTO, Keigo HOSHI, Yuji SUZAKI, Hirokazu KUWABARA, Nobutaka AKASHI, Ryuhei FURUE, Toshiyuki MATSUURA, Yoshiro SUGITA, Yuma AOKI, Yuuki MIYAZAKI
  • Patent number: 11800793
    Abstract: An organic electroluminescence device includes a first electrode, an organic layer disposed on the first electrode, and a second electrode disposed on the organic layer, wherein the organic layer includes a polycyclic compound represented by Formula 1. The organic electroluminescence device may have high emission efficiency.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: October 24, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hankyu Pak, Mun-ki Sim, Seokhwan Hwang, Junha Park, Jang Yeol Baek, Keigo Hoshi, Yuuki Miyazaki, Hyoyoung Lee, Minjung Jung, Sun Young Pak, Chanseok Oh
  • Publication number: 20230263047
    Abstract: A light emitting element includes a first electrode, a second electrode, and an emission layer disposed between the first electrode and the second electrode and including a polycyclic compound represented by Formula 1 below, thereby showing high emission efficiency. The substituents of Formula 1 are the same as defined in the detailed descriptions.
    Type: Application
    Filed: November 16, 2022
    Publication date: August 17, 2023
    Inventors: Yoshiro SUGITA, Keigo HOSHI, Ryuhei FURUE
  • Publication number: 20230225208
    Abstract: Provided is a light emitting element includes a polycyclic compound in which an electron donor substituent, which may increase the photoluminescence quantum yield (PLQY) and oscillator strength (f), is introduced at the para-position of a boron atom, thereby exhibiting high efficiency and long service life characteristics.
    Type: Application
    Filed: December 23, 2022
    Publication date: July 13, 2023
    Inventors: Keigo HOSHI, Ryuhei FURUE, Yoshiro SUGITA
  • Publication number: 20230113459
    Abstract: A light emitting diode of an embodiment includes a first electrode, a second electrode, and at least one functional layer disposed between the first electrode and the second electrode, wherein the at least one functional layer includes a polycyclic compound represented by Formula A or Formula B, thereby showing high emission efficiency properties and improved life characteristics.
    Type: Application
    Filed: April 14, 2022
    Publication date: April 13, 2023
    Applicant: Samsung Display Co., Ltd.
    Inventor: Keigo HOSHI
  • Patent number: 11424417
    Abstract: An organic electroluminescence device includes a first electrode, a second electrode on the first electrode, and an emission layer between the first electrode and the second electrode. The emission layer may include a compound including a first phenyl group that is substituted with at least one cyano group and a second phenyl group that is substituted with five substituted or unsubstituted carbazole groups, the second phenyl group being directly bonded to the first phenyl group.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: August 23, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yoshimasa Fujita, Keigo Hoshi, Yuuki Miyazaki
  • Publication number: 20220223799
    Abstract: Provided is a light emitting device including a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode. The emission layer includes at least one polycyclic compound represented by Formula 1 below, and may thus exhibit long life characteristics.
    Type: Application
    Filed: August 2, 2021
    Publication date: July 14, 2022
    Applicant: Samsung Display Co., Ltd.
    Inventors: Keigo HOSHI, Tetsuji HAYANO, Yuuki MIYAZAKI
  • Publication number: 20220223790
    Abstract: Provided is an organic electroluminescence device including a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The emission layer includes a polycyclic compound represented by Formula 1, and thus the organic electroluminescence device exhibits high luminous efficiency.
    Type: Application
    Filed: August 27, 2021
    Publication date: July 14, 2022
    Applicant: Samsung Display Co., Ltd.
    Inventors: Yuji SUZAKI, Hirokazu KUWABARA, Keigo HOSHI, Ryuhei FURUE, Tetsuji HAYANO, Yuuki MIYAZAKI
  • Publication number: 20220123228
    Abstract: A light emitting device of an embodiment includes a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode, wherein the emission layer includes a polycyclic compound represented by Formula 1. Accordingly, the light emitting device of an embodiment may show improved emission efficiency and increased life characteristics.
    Type: Application
    Filed: June 10, 2021
    Publication date: April 21, 2022
    Applicant: Samsung Display Co., Ltd.
    Inventor: Keigo Hoshi