Patents by Inventor Tatsuyoshi Takahashi

Tatsuyoshi Takahashi 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: 10586931
    Abstract: A compound includes a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton, a first substituent, and a second substituent. Each of the first substituent and the second substituent includes a furan skeleton, a thiophene skeleton, or a pyrrole skeleton. The first substituent is bonded to a pyrimidine ring included in the benzofuropyrimidine skeleton or a pyrimidine ring included in the benzothienopyrimidine skeleton. The second substituent is bonded to a benzene ring included in the benzofuropyrimidine skeleton or a benzene ring included in the benzothienopyrimidine skeleton. The light-emitting element includes the compound.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: March 10, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Miki Kanamoto, Hideko Inoue, Tatsuyoshi Takahashi, Hiromitsu Kido, Satoshi Seo
  • Patent number: 10586932
    Abstract: A light-emitting element having high emission efficiency is provided. A light-emitting element which has high emission efficiency without using a rare metal as a light-emitting material is provided. A light-emitting element includes a first electrode, a second electrode, and a layer between the first electrode and the second electrode. The layer contains a first organic compound and a second organic compound. The second organic compound has a carbazole skeleton and a substituted or unsubstituted bivalent aromatic hydrocarbon group. The second organic compound further has a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton. The aromatic hydrocarbon group is bonded to the carbazole skeleton. The aromatic hydrocarbon group is bonded to the benzofuropyrimidine skeleton or the benzothienopyrimidine skeleton. The first organic compound and the second organic compound can form an exciplex.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: March 10, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunsuke Hosoumi, Tatsuyoshi Takahashi, Takahiro Ishisone, Satoshi Seo
  • Publication number: 20200035939
    Abstract: A light-emitting element containing a fluorescent material and having high emission efficiency is provided. The light-emitting element contains the fluorescent material and a host material. The host material contains a first organic compound and a second organic compound. The first organic compound and the second organic compound can form an exciplex. The minimum value of a distance between centroids of the fluorescent material and at least one of the first organic compound and the second organic compound is 0.7 nm or more and 5 nm or less.
    Type: Application
    Filed: October 8, 2019
    Publication date: January 30, 2020
    Inventors: Shunsuke HOSOUMI, Takahiro ISHISONE, Tatsuyoshi TAKAHASHI, Satoshi SEO
  • Publication number: 20200020870
    Abstract: A multicolor light-emitting element using fluorescence and phosphorescence, which has a small number of manufacturing steps owing to a relatively small number of layers to be formed and is advantageous for practical application can be provided. In addition, a multicolor light-emitting element using fluorescence and phosphorescence, which has favorable emission efficiency is provided. A light-emitting element which includes a light-emitting layer having a stacked-layer structure of a first light-emitting layer exhibiting light emission from a first exciplex and a second light-emitting layer exhibiting phosphorescence is provided.
    Type: Application
    Filed: July 19, 2019
    Publication date: January 16, 2020
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Hiromi Seo, Tatsuyoshi Takahashi, Takahiro Ishisone
  • Publication number: 20200013967
    Abstract: A novel organometallic complex with high emission efficiency is provided. The organometallic complex, which is represented by General Formula (G1), includes iridium and a ligand including an aryl group including a cyano group at the 1-position of a benzimidazole skeleton and a phenyl group at the 2-position of the benzimidazole skeleton. (In the formula, Ar1 represents an aryl group having one or more substituents and 6 to 13 carbon atoms, and Ar1 includes at least one cyano group as the substituent. Each of R1 to R8 separately represents any of hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 12 carbon atoms, and a cyano group.
    Type: Application
    Filed: December 8, 2017
    Publication date: January 9, 2020
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yui YAMADA, Hideko YOSHIZUMI, Takeyoshi WATABE, Tatsuyoshi TAKAHASHI, Hiromitsu KIDO, Satoshi SEO
  • Publication number: 20200006673
    Abstract: To provide a light-emitting element with an improved reliability, a light-emitting element with a high current efficiency (or a high quantum efficiency), and a novel dibenzo[f,h]quinoxaline derivative that is favorably used in a light-emitting element which is one embodiment of the present invention. A light-emitting element includes an EL layer between an anode and a cathode. The EL layer includes a light-emitting layer; the light-emitting layer contains a first organic compound having an electron-transport property and a hole-transport property, a second organic compound having a hole-transport property, and a light-emitting substance; the combination of the first organic compound and the second organic compound forms an exciplex; the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound; and a difference between the HOMO level of the first organic compound and the HOMO level of the second organic compound is less than or equal to 0.4 eV.
    Type: Application
    Filed: September 13, 2019
    Publication date: January 2, 2020
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Takao HAMADA, Tatsuyoshi TAKAHASHI, Yasushi KITANO, Hiroki SUZUKI, Hideko INOUE
  • Patent number: 10505132
    Abstract: To provide a light-emitting element which uses a fluorescent material as a light-emitting substance and has higher luminous efficiency. To provide a light-emitting element which includes a mixture of a thermally activated delayed fluorescent substance and a fluorescent material. By making the emission spectrum of the thermally activated delayed fluorescent substance overlap with an absorption band on the longest wavelength side in absorption by the fluorescent material in an S1 level of the fluorescent material, energy at an S1 level of the thermally activated delayed fluorescent substance can be transferred to the S1 of the fluorescent material. Alternatively, it is also possible that the S1 of the thermally activated delayed fluorescent substance is generated from part of the energy of a T1 level of the thermally activated delayed fluorescent substance, and is transferred to the S1 of the fluorescent material.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: December 10, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Hiromi Seo, Tatsuyoshi Takahashi
  • Patent number: 10497884
    Abstract: To provide a novel organometallic complex. The organometallic complex is represented by General Formula (G1) and includes a central metal, a first ligand, and a second ligand. The first ligand and the second ligand are cyclometalated ligands. At least one of the first ligand and the second ligand includes a substituted or unsubstituted. aryl. group as a substituent. In General Formula (G1), each of R1 to R15 independently represents any of hydrogen, a halogen group, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, and a substituted or unsubstituted heteroaryl group having 3 to 12 carbon atoms. Note that at least one of R1 to R15 represents a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: December 3, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Miki Kurihara, Yui Yamada, Hideko Inoue, Satoshi Seo, Tatsuyoshi Takahashi, Hiromitsu Kido
  • Patent number: 10468602
    Abstract: A novel heterocyclic compound is provided. A novel heterocyclic compound that can be used for a light-emitting element is provided. A novel heterocyclic compound that can improve the reliability of a light-emitting element when used for a light-emitting element is provided. A light-emitting element, a light-emitting device, an electronic appliance, or a lighting device which includes the novel heterocyclic compound and is highly reliable is provided. One embodiment of the present invention is a heterocyclic compound represented by a general formula (G0). In the general formula (G0), A represents a dibenzo[f,h]quinoxalinyl group, B represents a substituted or unsubstituted fluorenyl group, and Ar represents a substituted or unsubstituted arylene group having 6 to 25 carbon atoms.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: November 5, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hideko Inoue, Yasushi Kitano, Hiromi Seo, Tatsuyoshi Takahashi, Satoshi Seo
  • Publication number: 20190321359
    Abstract: The present invention provides a heterocyclic compound represented by the general formula (1): The compound of the present invention has a wide treatment spectrum for mental disorders including central nervous system disorders, no side effects and high safety.
    Type: Application
    Filed: July 1, 2019
    Publication date: October 24, 2019
    Applicant: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Hiroshi YAMASHITA, Nobuaki ITO, Shin MIYAMURA, Kunio OSHIMA, Jun MATSUBARA, Hideaki KURODA, Haruka TAKAHASHI, Satoshi SHIMIZU, Tatsuyoshi TANAKA
  • Patent number: 10454052
    Abstract: A light-emitting element containing a fluorescent material and having high emission efficiency is provided. The light-emitting element contains the fluorescent material and a host material. The host material contains a first organic compound and a second organic compound. The first organic compound and the second organic compound can form an exciplex. The minimum value of a distance between centroids of the fluorescent material and at least one of the first organic compound and the second organic compound is 0.7 nm or more and 5 nm or less.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: October 22, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunsuke Hosoumi, Takahiro Ishisone, Tatsuyoshi Takahashi, Satoshi Seo
  • Patent number: 10446766
    Abstract: A novel organic compound that forms an exciplex emitting light with high efficiency is provided. An organic compound with a triarylamine skeleton in which the three aryl groups of the triarylamine skeleton are a p-biphenyl group, a fluoren-2-yl group, and a phenyl group to which a dibenzofuranyl group or a dibenzothiophenyl group is bonded. By the use of the organic compound and an organic compound with an electron-transport property, an exciplex that emits light with extremely high efficiency can be formed.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: October 15, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kaori Ogita, Satoshi Seo, Hiromi Seo, Tatsuyoshi Takahashi
  • Patent number: 10431752
    Abstract: An organometallic iridium complex that has high emission efficiency and a long lifetime and emits deep red light (emission wavelength: around 700 nm) is provided. The organometallic iridium complex has a ligand that is represented by General Formula (G0) and has at least a dimethyl phenyl group and a quinoxaline skeleton. In the formula, R1 to R3 separately represent an alkyl group having 1 to 6 carbon atoms, a phenyl group, or a phenyl group having an alkyl group having 1 to 6 carbon atoms as a substituent.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: October 1, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hideko Inoue, Tomoya Yamaguchi, Hiromi Seo, Tatsuyoshi Takahashi, Satoshi Seo
  • Patent number: 10418565
    Abstract: To provide a light-emitting element with an improved reliability, a light-emitting element with a high current efficiency (or a high quantum efficiency), and a novel dibenzo[f,h]quinoxaline derivative that is favorably used in a light-emitting element which is one embodiment of the present invention. A light-emitting element includes an EL layer between an anode and a cathode. The EL layer includes a light-emitting layer; the light-emitting layer contains a first organic compound having an electron-transport property and a hole-transport property, a second organic compound having a hole-transport property, and a light-emitting substance; the combination of the first organic compound and the second organic compound forms an exciplex; the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound; and a difference between the HOMO level of the first organic compound and the HOMO level of the second organic compound is less than or equal to 0.4 eV.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: September 17, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Takao Hamada, Tatsuyoshi Takahashi, Yasushi Kitano, Hiroki Suzuki, Hideko Inoue
  • Publication number: 20190267564
    Abstract: To provide a light-emitting element which uses a fluorescent material as a light-emitting substance and has higher luminous efficiency. To provide a light-emitting element which includes a mixture of a thermally activated delayed fluorescent substance and a fluorescent material. By making the emission spectrum of the thermally activated delayed fluorescent substance overlap with an absorption band on the longest wavelength side in absorption by the fluorescent material in an S1 level of the fluorescent material, energy at an S1 level of the thermally activated delayed fluorescent substance can be transferred to the S1 of the fluorescent material. Alternatively, it is also possible that the S1 of the thermally activated delayed fluorescent substance is generated from part of the energy of a T1 level of the thermally activated delayed fluorescent substance, and is transferred to the S1 of the fluorescent material.
    Type: Application
    Filed: May 15, 2019
    Publication date: August 29, 2019
    Inventors: Satoshi SEO, Hiromi SEO, Tatsuyoshi TAKAHASHI
  • Patent number: 10388891
    Abstract: As a novel substance having a novel skeleton, an organometallic complex with high emission efficiency is provided. The organometallic complex includes a metal and a ligand. The metal is iridium or platinum. The ligand includes a 5H-pyrimido[5,4-b]indole skeleton and an aryl group bonded to the 4-position of the 5H-pyrimido[5,4-b]indole skeleton. The 3-position of the 5H-pyrimido[5,4-b]indole skeleton and the aryl group are bonded to the metal. In the formula, M represents iridium or platinum. In addition, Ar represents a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, and each of R1 to R6 independently represents hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: August 20, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tomoya Yamaguchi, Hideko Inoue, Tatsuyoshi Takahashi
  • Publication number: 20190245146
    Abstract: A light-emitting element with a lower voltage and higher emission efficiency is provided. The light-emitting element includes a first organic compound, a second organic compound, and a guest material. The LUMO level of the first organic compound is lower than the LUMO level of the second organic compound, and a difference between them is larger than 0 eV and smaller than or equal to 0.5 eV. Furthermore, the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound. The guest material has a function of converting triplet excitation energy into light emission. The first organic compound and the second organic compound form an exciplex.
    Type: Application
    Filed: April 16, 2019
    Publication date: August 8, 2019
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Tatsuyoshi Takahashi, Kyoko Takeda, Kenta Abe, Hiroki Suzuki
  • Patent number: 10361389
    Abstract: A multicolor light-emitting element using fluorescence and phosphorescence, which has a small number of manufacturing steps owing to a relatively small number of layers to be formed and is advantageous for practical application can be provided. In addition, a multicolor light-emitting element using fluorescence and phosphorescence, which has favorable emission efficiency is provided. A light-emitting element which includes a light-emitting layer having a stacked-layer structure of a first light-emitting layer exhibiting light emission from a first exciplex and a second light-emitting layer exhibiting phosphorescence is provided.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: July 23, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Hiromi Seo, Tatsuyoshi Takahashi, Takahiro Ishisone
  • Patent number: 10347847
    Abstract: A novel organic compound that forms an exciplex emitting light with high efficiency is provided. An organic compound with a triarylamine skeleton in which the three aryl groups of the triarylamine skeleton are a p-biphenyl group, a fluoren-2-yl group, and a phenyl group to which a dibenzofuranyl group or a dibenzothiophenyl group is bonded. By the use of the organic compound and an organic compound with an electron-transport property, an exciplex that emits light with extremely high efficiency can be formed.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: July 9, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kaori Ogita, Satoshi Seo, Hiromi Seo, Tatsuyoshi Takahashi
  • Publication number: 20190207124
    Abstract: Provided is a novel compound or a light-emitting element with high emission efficiency. The provided novel compound includes a bicarbazole skeleton and a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton. The provided light-emitting element includes the compound.
    Type: Application
    Filed: March 4, 2019
    Publication date: July 4, 2019
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Miki Kanamoto, Takeyoshi WATABE, Hideko INOUE, Satoshi SEO, Satomi MITSUMORI, Tatsuyoshi TAKAHASHI