Patents by Inventor Hirokazu Miyashita

Hirokazu Miyashita 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: 10669466
    Abstract: Provided is a cold-storage agent freezing at a temperature range of a freezer in a household refrigerator and excellent in cooling retaining performance. In a cold-storage agent including: water; ammonium chloride; potassium chloride; and sodium sulfate, content of the ammonium chloride, the potassium chloride, and the sodium sulfate satisfies the following Formula (1): 1.0<ammonium chloride/(potassium chloride+sodium sulfate)<5.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: June 2, 2020
    Assignee: JAPAN COLD CHAIN CO., LTD
    Inventor: Hirokazu Miyashita
  • Patent number: 10636982
    Abstract: The present invention provides a novel iridium complex and an organic light-emitting device including the novel iridium complex. The novel iridium complex includes three ligands, and two of them have a phenyl-naphtho[2,1-f]isoquinoline skeleton. The present invention also provides a display apparatus including the organic light-emitting device and an electrophotographic image-forming apparatus including a light source including the organic light-emitting device and including a photosensitive member.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: April 28, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shigemoto Abe, Jun Kamatani, Kengo Kishino, Akihito Saitoh, Naoki Yamada, Tetsuya Kosuge, Takayuki Horiuchi, Yosuke Nishide, Hirokazu Miyashita
  • Publication number: 20200119281
    Abstract: The present disclosure provides an organic compound represented by general formula [1] below. In formula [1], Ar1 and Ar2 each represent an alkyl group having 1 to 8 carbon atoms, an aromatic hydrocarbon group having 6 to 18 carbon atoms, or a heteroaromatic group having 3 to 17 carbon atoms. Ar1 and Ar2 may be the same or different. Ar3 and Ar4 are each a substituent having a carbazolyl group. Ar3 and Ar4 may be the same or different. Ar1 to Ar4 may be substituted. At least one of Ar1 to Ar4 has a tert-butyl group. The total number of tert-butyl groups in one molecule of the organic compound is 2 or more.
    Type: Application
    Filed: December 13, 2019
    Publication date: April 16, 2020
    Inventors: Hirokazu Miyashita, Naoki Yamada, Hiroki Ohrui, Hironobu Iwawaki, Yosuke Nishide, Jun Kamatani
  • Publication number: 20200111964
    Abstract: An organic compound represented by formula (1) and an organic compound represented by formula (2). These organic compounds provide high color purity. In formulae (1) and (2), R1 to R24 are each independently selected from the group consisting of a hydrogen atom and a substituent.
    Type: Application
    Filed: September 27, 2019
    Publication date: April 9, 2020
    Inventors: Yosuke Nishide, Hirokazu Miyashita, Naoki Yamada, Jun Kamatani, Shoma Hinata
  • Patent number: 10615350
    Abstract: Provided is an organic light-emitting element having high luminous efficiency and a long lifetime. The organic light-emitting element includes a pair of electrodes and an organic compound layer placed between the pair of electrodes, in which the organic compound layer includes an iridium complex having a benzo[f]isoquinoline of a specific structure as a ligand and a metal complex compound of a specific structure.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: April 7, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jun Kamatani, Naoki Yamada, Tetsuya Kosuge, Takayuki Horiuchi, Shigemoto Abe, Yosuke Nishide, Hirokazu Miyashita, Kengo Kishino, Akihito Saitoh
  • Publication number: 20200048171
    Abstract: An organic compound that emits red light having a long wavelength is represented by formula (1). In formula (1), R1 to R24 are each independently selected from the group consisting of a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted aryloxy group, a silyl group, and a cyano group.
    Type: Application
    Filed: August 7, 2019
    Publication date: February 13, 2020
    Inventors: Naoki Yamada, Jun Kamatani, Yosuke Nishide, Hirokazu Miyashita
  • Publication number: 20200044175
    Abstract: A white organic electroluminescent (EL) element includes, in sequence, an anode, a first light-emitting layer that is a blue-light-emitting layer, a hole-blocking layer, an electron transport layer, and a cathode. The hole-blocking layer is adjacent to the first light-emitting layer and the electron transport layer and formed of a hydrocarbon. The electron transport layer is formed of a nitrogen-containing heterocyclic compound. The first light-emitting layer contains a first host and a first dopant that emits blue fluorescent light. Relations (a), (b), and (c) are satisfied. LUMO(H1)>LUMO(D1)??(a) 0.1<d(ETL)/d(HBL)<0.
    Type: Application
    Filed: July 26, 2019
    Publication date: February 6, 2020
    Inventors: Tomokazu Kotake, Hirokazu Miyashita, Itaru Takaya, Takayuki Ito, Koji Ishizuya, Norifumi Kajimoto
  • Patent number: 10541260
    Abstract: An organic photoelectric conversion element includes an anode, a cathode, and a photoelectric conversion portion between the anode and the cathode. The photoelectric conversion portion includes a first organic compound layer containing an organic compound. Also, a second organic compound layer is disposed between the cathode and the photoelectric conversion portion. The second organic compound layer contains an organic compound having an ionization potential of 5.1 eV or less and a band gap of 2.5 eV or more.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: January 21, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Naoki Yamada, Masumi Itabashi, Yosuke Nishide, Hirokazu Miyashita, Tetsuya Kosuge, Satoru Shiobara, Tetsuo Takahashi, Akihiro Senoo, Kentaro Ito, Satoshi Ota
  • Publication number: 20200006667
    Abstract: The present disclosure provides an organic light emitting element which has a pair of electrodes and an organic compound layer disposed therebetween and in which the organic compound layer contains an organic compound represented by the following general formula [1], wherein in the formula [1], Ar1 and Ar2 each independently represent an aromatic hydrocarbon group or a heteroaromatic ring group, R1 to R4 are each independently selected from a hydrogen atom or a substituent, R1 and R2 and R3 and R4 each may form a benzene ring, wherein the benzene ring may have at least one substituent.
    Type: Application
    Filed: September 12, 2019
    Publication date: January 2, 2020
    Inventors: Hirokazu Miyashita, Jun Kamatani
  • Publication number: 20190364191
    Abstract: Provided is a photoelectric conversion element including an anode, a photoelectric conversion layer that contains a first organic semiconductor, a second organic semiconductor, and a third organic semiconductor, and a cathode. As each of the first organic semiconductor, the second organic semiconductor, and the third organic semiconductor, a low-molecular weight organic semiconductor is used. The first organic semiconductor, the second organic semiconductor, and the third organic semiconductor have mass ratios that satisfy the following relationship: the first organic semiconductor?the second organic semiconductor?the third organic semiconductor. Further, when a total amount of the first organic semiconductor, the second organic semiconductor, and the third organic semiconductor is 100 mass %, a content of the second organic semiconductor is 6 mass % or more, and a content of the third organic semiconductor is 3 mass % or more.
    Type: Application
    Filed: July 26, 2019
    Publication date: November 28, 2019
    Inventors: Tetsuo Takahashi, Satoru Shiobara, Jun Kamatani, Naoki Yamada, Tomona Yamaguchi, Hiroki Ohrui, Hironobu Iwawaki, Masumi Itabashi, Yosuke Nishide, Hirokazu Miyashita, Norifumi Kajimoto, Moe Takahira, Isao Kawata, Yuto Ito
  • Patent number: 10468614
    Abstract: The present disclosure provides a photoelectric conversion element including a lower electrode, a photoelectric conversion layer, and an upper electrode in this order; a voltage is applied between the lower electrode and the upper electrode; the photoelectric conversion layer contains a first organic compound and a second organic compound; the first organic compound has a lower oxidation potential than the second organic compound, and ?E represented by the following formula (A) satisfies the following formula (B); where ?E=oxidation potential of first organic compound?reduction potential of second organic compound (A) ?E?1.79[V]??(B).
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: November 5, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Satoru Shiobara, Naoki Yamada, Tetsuo Takahashi, Jun Kamatani, Yosuke Nishide, Hirokazu Miyashita, Tomona Yamaguchi, Hironobu Iwawaki, Hiroki Ohrui, Masumi Itabashi, Norifumi Kajimoto
  • Publication number: 20190333968
    Abstract: An organic EL element includes a first electrode, a first luminescent layer, a second luminescent layer, a third luminescent layer, and a second electrode, in this order. The second luminescent layer is in contact with the first luminescent layer and the third luminescent layer. The first luminescent layer contains a red dopant and a first host material. The second luminescent layer contains a blue dopant and a second host material, and the third luminescent layer contains a green dopant and the second host material. The second host material is different from the first host material.
    Type: Application
    Filed: April 24, 2019
    Publication date: October 31, 2019
    Inventors: Naoki Yamada, Itaru Takaya, Jun Kamatani, Hirokazu Miyashita
  • Patent number: 10403827
    Abstract: A stable 2,2?-bibenzo[d]imidazolidene compound is provided. The 2,2?-bibenzo[d]imidazolidene compound is expressed by the following General Formula (1). In General Formula (1), Ar1 to Ar8 each represent a substituted or unsubstituted condensed ring. R1 to R8 each represent a hydrogen atom or a substituent.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: September 3, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Yosuke Nishide, Hirokazu Miyashita, Naoki Yamada
  • Publication number: 20190267411
    Abstract: A photoelectric conversion element including an anode, a cathode, and a photoelectric conversion layer, wherein the photoelectric conversion layer contains a first organic compound and a second organic compound, and difference between oxidation potential of first organic compound and reduction potential of second organic compound is larger than 1.5 [V], and the first organic compound is any one of general formulae [1] below, a fluoranthene derivative, and a metal complex, R1 represents a hydrogen atom or a substituent, Ar1, Ar2, and Z1 represents a substituent, n1 and n2 represents an integer of 0 to 4, and X1 to X3 represents a nitrogen atom, a sulfur atom, an oxygen atom, or a carbon atom.
    Type: Application
    Filed: May 8, 2019
    Publication date: August 29, 2019
    Inventors: Satoru Shiobara, Naoki Yamada, Tetsuo Takahashi, Jun Kamatani, Yosuke Nishide, Hirokazu Miyashita, Tomona Yamaguchi, Hironobu Iwawaki, Hiroki Ohrui, Norifumi Kajimoto, Masumi Itabashi, Kentaro Ito
  • Publication number: 20190267545
    Abstract: The present disclosure provides a photoelectric conversion element including a lower electrode, a photoelectric conversion layer, and an upper electrode in this order, wherein the photoelectric conversion layer includes a first organic compound and a second organic compound having a lower reduction potential than that of the first organic compound, the first organic compound has an emission lifetime of 1.1 ns or more in chloroform solution, and the first organic compound is an organic compound represented by Formula [1] according to claim 1, a fluoranthene derivative, or a metal complex.
    Type: Application
    Filed: May 7, 2019
    Publication date: August 29, 2019
    Inventors: Tomona Yamaguchi, Naoki Yamada, Tetsuo Takahashi, Jun Kamatani, Yosuke Nishide, Hirokazu Miyashita, Satoru Shiobara, Hironobu Iwawaki, Hiroki Ohrui, Masumi Itabashi
  • Patent number: 10367113
    Abstract: A device uses a light-emitting material. The device includes an upper and a lower electrode, a first photoelectric conversion portion disposed between the upper electrode and the lower electrode, a second photoelectric conversion portion, a first readout circuit connected to the first photoelectric conversion portion, and a second readout circuit connected to the second photoelectric conversion portion. The second photoelectric conversion portion converts light emitted from the light-emitting material into electrical charges.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: July 30, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tetsuo Takahashi, Hidekazu Takahashi, Naoki Yamada, Yojiro Matsuda, Masumi Itabashi, Hirokazu Miyashita, Kazuaki Tashiro
  • Publication number: 20190148644
    Abstract: The present disclosure provides an organic compound expressed by the following General Formula 1: In General Formula 1, a partial structure Z1 represents a condensed polycyclic group that may include a nitrogen atom in a skeleton, and that includes at least one of a five-membered ring and a six-membered ring. The partial structure Z1 may include, as a substituent, a carbonyl group, a dicyanovinylidene group, a halogen atom, a cyano group, an alkyl group, an alkoxy group, an aromatic heterocyclic group, or an aryl group. R1 and R2 represent an alkyl group, aryl group, an aromatic heterocyclic group, a halogen group, or a cyano group. Ar1 represents an arylene group or a divalent aromatic heterocyclic group, and Ar2 and Ar3 represent an aryl group or an aromatic heterocyclic group. n represents an integer of 1 to 4.
    Type: Application
    Filed: January 9, 2019
    Publication date: May 16, 2019
    Inventors: Naoki Yamada, Jun Kamatani, Hiroki Ohrui, Hironobu Iwawaki, Masumi Itabashi, Yosuke Nishide, Hirokazu Miyashita, Satoru Shiobara, Tomona Yamaguchi, Tetsuo Takahashi
  • Publication number: 20190123279
    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: Application
    Filed: October 16, 2018
    Publication date: April 25, 2019
    Inventors: Norifumi Kajimoto, Tetsuo Takahashi, Koji Ishizuya, Itaru Takaya, Hirokazu Miyashita, Takayuki Ito, Hiroaki Sano
  • Publication number: 20190119258
    Abstract: An organic compound represented by the following general formula [1] is excellent in thermal stability. In the general formula [1], R1 to R12 are each independently selected from the group consisting of a hydrogen atom and a substituent. Symbol A is selected from the group consisting of a divalent residue of naphthalene, phenanthrene, fluorene, benzofluorene, dibenzofluorene or spirofluorene, and a heteroarylene group having 4 to 12 carbon atoms. Symbol B is selected from the group consisting of an arylene group having 6 to 25 carbon atoms and a heteroarylene group having 4 to 12 carbon atoms. Symbol n is an integer of 0 to 3.
    Type: Application
    Filed: October 18, 2018
    Publication date: April 25, 2019
    Inventors: Yosuke Nishide, Naoki Yamada, Hiroki Ohrui, Hironobu Iwawaki, Hirokazu Miyashita, Jun Kamatani
  • Publication number: 20190112514
    Abstract: Provided is a cold-storage agent freezing at a temperature range of a freezer in a household refrigerator and excellent in cooling retaining performance. In a cold-storage agent including: water; ammonium chloride; potassium chloride; and sodium sulfate, content of the ammonium chloride, the potassium chloride, and the sodium sulfate satisfies the following Formula (1): 1.0<ammonium chloride/(potassium chloride+sodium sulfate)<5.
    Type: Application
    Filed: August 29, 2016
    Publication date: April 18, 2019
    Applicant: JAPAN COLD CHAIN CO., LTD.
    Inventor: Hirokazu MIYASHITA