Patents by Inventor Ryuji Ishii

Ryuji Ishii 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: 11844233
    Abstract: An organic light-emitting element includes, from a first surface of a substrate in this order, the substrate, a lower electrode, an organic compound layer, an upper electrode, a first protective layer containing inorganic material, a second protective layer whose density is higher than the density of the first protective layer, and a third protective layer whose density is higher than the density of the first protective layer, in which the third protective layer is disposed on a second surface of the substrate opposite to the first surface of the substrate.
    Type: Grant
    Filed: April 8, 2022
    Date of Patent: December 12, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukito Aota, Ryuji Ishii, Koichi Ishige, Takashi Tsuboi
  • Patent number: 11765927
    Abstract: There is provided a semiconductor device having a semiconductor element and a protective film that is disposed above the semiconductor element and contains silicon atoms and nitrogen atoms, wherein the protective film has an average number of nitrogen atoms bonded to one silicon atom of less than or equal to 1.35.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: September 19, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tetsuo Takahashi, Koichi Ishige, Ryuji Ishii
  • Publication number: 20220231261
    Abstract: An organic light-emitting element includes, from a first surface of a substrate in this order, the substrate, a lower electrode, an organic compound layer, an upper electrode, a first protective layer containing inorganic material, a second protective layer whose density is higher than the density of the first protective layer, and a third protective layer whose density is higher than the density of the first protective layer, in which the third protective layer is disposed on a second surface of the substrate opposite to the first surface of the substrate.
    Type: Application
    Filed: April 8, 2022
    Publication date: July 21, 2022
    Inventors: Yukito Aota, Ryuji Ishii, Koichi Ishige, Takashi Tsuboi
  • Patent number: 11342535
    Abstract: An organic light-emitting element includes, from a first surface of a substrate in this order, the substrate, a lower electrode, an organic compound layer, an upper electrode, a first protective layer containing inorganic material, a second protective layer whose density is higher than the density of the first protective layer, and a third protective layer whose density is higher than the density of the first protective layer, in which the third protective layer is disposed on a second surface of the substrate opposite to the first surface of the substrate.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: May 24, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukito Aota, Ryuji Ishii, Koichi Ishige, Takashi Tsuboi
  • Patent number: 11139435
    Abstract: Provided is an organic light emitting element including: an anode; a cathode; and an organic compound layer formed between the anode and the cathode and including a hole injection layer, a hole transport layer, and an emission layer, in which: the emission layer includes a host and a dopant; the hole transport layer includes a hole transport material having multiple aromatic hydrocarbon skeletons and a single bond for linking the aromatic hydrocarbon skeletons; the hole transport material has a triplet level T1 of 1.8 eV or more; the hole transport material has a hole mobility of 1×10?5 cm2/Vs or more; and the hole transport layer and the emission layer satisfy relationships represented by the following expression (1): |reduction potential of hole transport material|?|reduction potential of host|>0.1 V??(1) and the following expression (2): |HOMO level of hole transport material?HOMO level of host|<0.1 eV??(2).
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: October 5, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ryuji Ishii, Hiroki Ohrui, Kei Tagami, Masumi Itabashi
  • Publication number: 20200194720
    Abstract: An organic light-emitting element includes, from a first surface of a substrate in this order, the substrate, a lower electrode, an organic compound layer, an upper electrode, a first protective layer containing inorganic material, a second protective layer whose density is higher than the density of the first protective layer, and a third protective layer whose density is higher than the density of the first protective layer, in which the third protective layer is disposed on a second surface of the substrate opposite to the first surface of the substrate.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 18, 2020
    Inventors: Yukito Aota, Ryuji Ishii, Koichi Ishige, Takashi Tsuboi
  • Publication number: 20200152911
    Abstract: There is provided a semiconductor device having a semiconductor element and a protective film that is disposed above the semiconductor element and contains silicon atoms and nitrogen atoms, wherein the protective film has an average number of nitrogen atoms bonded to one silicon atom of less than or equal to 1.35.
    Type: Application
    Filed: October 31, 2019
    Publication date: May 14, 2020
    Inventors: Tetsuo Takahashi, Koichi Ishige, Ryuji Ishii
  • Publication number: 20180301633
    Abstract: Provided is an organic light emitting element including: an anode; a cathode; and an organic compound layer formed between the anode and the cathode and including a hole injection layer, a hole transport layer, and an emission layer, in which: the emission layer includes a host and a dopant; the hole transport layer includes a hole transport material having multiple aromatic hydrocarbon skeletons and a single bond for linking the aromatic hydrocarbon skeletons; the hole transport material has a triplet level T1 of 1.8 eV or more; the hole transport material has a hole mobility of 1×10?5 cm2/Vs or more; and the hole transport layer and the emission layer satisfy relationships represented by the following expression (1): |reduction potential of hole transport material|?|reduction potential of host|>0.1 V??(1) and the following expression (2): |HOMO level of hole transport material?HOMO level of host|<0.1 eV??(2).
    Type: Application
    Filed: June 26, 2018
    Publication date: October 18, 2018
    Inventors: Ryuji Ishii, Hiroki Ohrui, Kei Tagami, Masumi Itabashi
  • Patent number: 10032987
    Abstract: Provided is an organic light emitting element including: an anode; a cathode; and an organic compound layer formed between the anode and the cathode and including a hole injection layer, a hole transport layer, and an emission layer, in which: the emission layer includes a host and a dopant; the hole transport layer includes a hole transport material having multiple aromatic hydrocarbon skeletons and a single bond for linking the aromatic hydrocarbon skeletons; the hole transport material has a triplet level T1 of 1.8 eV or more; the hole transport material has a hole mobility of 1×10?5 cm2/Vs or more; and the hole transport layer and the emission layer satisfy relationships represented by the following expression (1): |reduction potential of hole transport material|?|reduction potential of host|>0.1 V??(1) and the following expression (2): |HOMO level of hole transport material?HOMO level of host|<0.1 eV??(2).
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: July 24, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ryuji Ishii, Hiroki Ohrui, Kei Tagami, Masumi Itabashi
  • Patent number: 9911921
    Abstract: Provided is an organic light-emitting device capable of outputting light with high efficiency and high luminance. The organic light-emitting device includes an anode, a cathode, an emission layer placed between the anode and the cathode, and an organic compound layer placed between the anode and the emission layer, in which the organic compound layer contains the following compound A and compound B: [Compound A] an organic compound free of a nitrogen atom and a metal atom, the compound having SP2 carbon atoms and SP3 carbon atoms, and having a ratio of the number of the SP3 carbon atoms to the number of the SP2 carbon atoms of 40% or more; and [Compound B] a compound having a tertiary amine structure.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: March 6, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Yamada, Jun Kamatani, Akihito Saitoh, Yosuke Nishide, Masanori Muratsubaki, Ryuji Ishii, Koichi Ishige, Takayuki Ito, Norifumi Kajimoto, Nobutaka Mizuno
  • Patent number: 9755165
    Abstract: Provided is an organic light emitting element having high light emitting efficiency. The organic light emitting element includes: an anode; a cathode; an emission layer placed between the anode and the cathode; and a hole transport layer formed between the anode and the emission layer, in which the hole transport layer contains a siloxane compound and a compound having a tertiary arylamine structure; and number of SP2 carbon atoms in the hole transport layer is ten times or less number of silicon atoms in the hole transport layer.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: September 5, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yosuke Nishide, Naoki Yamada, Jun Kamatani, Ryuji Ishii, Norifumi Kajimoto, Takayuki Ito, Nobutaka Mizuno, Koichi Ishige, Akihito Saitoh
  • Patent number: 9748490
    Abstract: An organic compound contains 8H-naphth[2,1-b]carbazole as the basic skeleton thereof. An organic light-emitting element includes an organic compound layer containing the organic compound. A display device and an image display unit each include the organic light-emitting element. The organic light-emitting element is also used in a lighting device and an image forming apparatus.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: August 29, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hirokazu Miyashita, Ryuji Ishii, Masanori Muratsubaki, Masumi Itabashi, Jun Kamatani
  • Patent number: 9472766
    Abstract: The present invention provides a novel fused polycyclic compound suitably used for a blue light emitting element and an organic light emitting element including the fused polycyclic compound. A fused polycyclic compound is represented by at least one of the general formulas [1] and [2] according to claim 1. In the general formulas [1] and [2], R1 to R20 each represent a hydrogen atom or a substituent.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: October 18, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masumi Itabashi, Hiroki Ohrui, Hironobu Iwawaki, Kei Tagami, Tetsuo Takahashi, Kenichi Ikari, Ryuji Ishii, Masanori Muratsubaki
  • Publication number: 20160299454
    Abstract: A light emitter includes an elongated substrate and a plurality of emission elements on the substrate. The emission elements include a first electrode, an organic layer, and a second electrode in this order from the substrate side. The organic layer stretches over one of the emission elements and a next one in the longitudinal direction of the substrate. The light emitter further has a plurality of projections on the substrate. Each of the projections is adjacent to each of the emission elements in the transverse direction of the substrate. The emission elements are located between one of the projections and another. The projections are higher than the second electrode with respect to the principal surface of the substrate. The projections and the second electrode are spaced from each other.
    Type: Application
    Filed: April 4, 2016
    Publication date: October 13, 2016
    Inventors: Satoru Shiobara, Ryuji Ishii, Koji Ishizuya, Yojiro Matsuda
  • Publication number: 20160133846
    Abstract: Provided is an organic light emitting element including: an anode; a cathode; and an organic compound layer formed between the anode and the cathode and including a hole injection layer, a hole transport layer, and an emission layer, in which: the emission layer includes a host and a dopant; the hole transport layer includes a hole transport material having multiple aromatic hydrocarbon skeletons and a single bond for linking the aromatic hydrocarbon skeletons; the hole transport material has a triplet level T1 of 1.8 eV or more; the hole transport material has a hole mobility of 1×10?5 cm2/Vs or more; and the hole transport layer and the emission layer satisfy relationships represented by the following expression (1): |reduction potential of hole transport material|?|reduction potential of host|>0.1 V??(1) and the following expression (2): |HOMO level of hole transport material-HOMO level of host|<0.1 eV (2).
    Type: Application
    Filed: May 15, 2014
    Publication date: May 12, 2016
    Inventors: Ryuji Ishii, Hiroki Ohrui, Kei Tagami, Masumi Itabashi
  • Publication number: 20160118607
    Abstract: Provided is an organic light emitting element having high light emitting efficiency. The organic light emitting element includes: an anode; a cathode; an emission layer placed between the anode and the cathode; and a hole transport layer formed between the anode and the emission layer, in which the hole transport layer contains a siloxane compound and a compound having a tertiary arylamine structure; and number of SP2 carbon atoms in the hole transport layer is ten times or less number of silicon atoms in the hole transport layer.
    Type: Application
    Filed: March 25, 2014
    Publication date: April 28, 2016
    Inventors: Yosuke Nishide, Naoki Yamada, Jun Kamatani, Ryuji Ishii, Norifumi Kajimoto, Takayuki Ito, Nobutaka Mizuno, Koichi Ishige, Akihito Saitoh
  • Publication number: 20160035982
    Abstract: The present invention provides a novel fused polycyclic compound suitably used for a blue light emitting element and an organic light emitting element including the fused polycyclic compound. A fused polycyclic compound is represented by at least one of the general formulas [1] and [2] according to claim 1. In the general formulas [1] and [2], R1 to R20 each represent a hydrogen atom or a substituent.
    Type: Application
    Filed: January 29, 2014
    Publication date: February 4, 2016
    Inventors: Masumi Itabashi, Hiroki Ohrui, Hironobu Iwawaki, Kei Tagami, Tetsuo Takahashi, Kenichi Ikari, Ryuji Ishii, Masanori Muratsubaki
  • Publication number: 20150372238
    Abstract: Provided is an organic light-emitting device capable of outputting light with high efficiency and high luminance. The organic light-emitting device includes an anode, a cathode, an emission layer placed between the anode and the cathode, and an organic compound layer placed between the anode and the emission layer, in which the organic compound layer contains the following compound A and compound B: [Compound A] an organic compound free of a nitrogen atom and a metal atom, the compound having SP2 carbon atoms and SP3 carbon atoms, and having a ratio of the number of the SP3 carbon atoms to the number of the SP2 carbon atoms of 40% or more; and [Compound B] a compound having a tertiary amine structure.
    Type: Application
    Filed: April 3, 2014
    Publication date: December 24, 2015
    Inventors: Naoki Yamada, Jun Kamatani, Akihito Saitoh, Yosuke Nishide, Masanori Muratsubaki, Ryuji Ishii, Koichi Ishige, Takayuki Ito, Norifumi Kajimoto, Nobutaka Mizuno
  • Publication number: 20150212450
    Abstract: A novel organic compound suitable for blue-light-emitting devices and an organic light-emitting device including the compound are provided. An organic compound represented by Formula [1] according to claim 1 is provided. In Formula [1], R1 to R16 each independently represent a group selected from a hydrogen atom, a cyano group, substituted or unsubstituted alkyl groups, substituted or unsubstituted aryl groups, and substituted or unsubstituted heterocyclic groups.
    Type: Application
    Filed: July 18, 2013
    Publication date: July 30, 2015
    Inventors: Kei Tagami, Hiroki Ohrui, Hironobu Iwawaki, Masumi Itabashi, Tetsuo Takahashi, Kenichi Ikari, Ryuji Ishii, Masanori Muratsubaki
  • Patent number: 8974923
    Abstract: The present invention provides a novel organic compound that is chemically stable and can be used as a host material for phosphorescence emission. The present invention provides a benzimidazolyl carbazole compound shown by Formula [1] described in the description.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: March 10, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hajime Muta, Takeshi Sekiguchi, Ryuji Ishii, Koichi Suzuki