Patents by Inventor Satoshi Seo

Satoshi Seo 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: 20210234112
    Abstract: A novel light-emitting device is provided. A light-emitting device or a display device having high display quality is provided. An electronic device including a display portion with high display quality is provided. Provided is a light-emitting device including a first pixel which includes a first light-emitting element and a light-scattering layer; and a second pixel which includes a second light-emitting element and a first color conversion layer, in which an emission center substance in each of the first light-emitting element and the second light-emitting element is an organic compound, the light-scattering layer includes a first substance that scatters light emitted from the first light-emitting element, the first color conversion layer includes a second substance that emits light by absorbing light emitted from the second light-emitting element, and the first light-emitting element and the second light-emitting element have a microcavity structure.
    Type: Application
    Filed: May 31, 2019
    Publication date: July 29, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Shunpei YAMAZAKI
  • Publication number: 20210234115
    Abstract: A novel light-emitting device with high emission efficiency is provided. A light-emitting device with a high blue index (BI) is provided. A light-emitting device with low power consumption is provided. A light-emitting device including a first electrode and a second electrode which are a reflective electrode and a semi-transmissive and semi-reflective electrode, and an EL layer sandwiched between the first electrode and the second electrode, where the EL layer contains an emission center substance, where when the emission center substance in the EL layer includes only one kind of substance, photon energy of a peak wavelength of light emitted from the light-emitting device is designed from an average value of photon energy of light emitted by the emission center substance in a solution state and emission edge energy on a short wavelength side of an emission spectrum of the emission center substance in the solution state.
    Type: Application
    Filed: May 10, 2019
    Publication date: July 29, 2021
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Satoshi SEO, Toshiki SASAKI, Ryohei YAMAOKA, Shiho NOMURA
  • Patent number: 11072623
    Abstract: Provided is a light-emitting element including a first organic compound, a second organic compound, and a guest material. The LUMO level of the first organic compound is lower than that of the second organic compound. The HOMO level of the first organic compound is lower than that of the second organic compound. The LUMO level of the guest material is higher than that of the first organic compound. The HOMO level of the guest material is higher than that of the second organic compound. An energy difference between the LUMO level and the HOMO level of the guest material is larger than an energy difference between the LUMO level of the first organic compound and the HOMO level of the second organic compound. The guest material can convert triplet excitation energy into light emission. The combination of first organic compound and the second organic compound can form an exciplex.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: July 27, 2021
    Inventors: Satoshi Seo, Takao Hamada
  • Publication number: 20210225888
    Abstract: A lightweight flexible light-emitting device which is able to possess a curved display portion and display a full color image with high resolution and the manufacturing process thereof are disclosed. The light-emitting device comprises: a plastic substrate; an insulating layer with an adhesive interposed therebetween; a thin film transistor over the insulating layer; a protective insulating film over the thin film transistor; a color filter over the protective insulating film; an interlayer insulating film over the color filter; and a white-emissive light-emitting element formed over the interlayer insulating film and being electrically connected to the thin film transistor.
    Type: Application
    Filed: February 3, 2021
    Publication date: July 22, 2021
    Inventors: Satoshi SEO, Kaoru HATANO
  • Publication number: 20210225942
    Abstract: A novel display panel that is highly convenient or reliable is provided. The display panel includes a first pixel; the first pixel includes a first display element, a first color conversion layer, and a first absorption layer; the first display element emits first light; the first absorption layer overlaps with the first display element; and the first absorption layer absorbs the first light. Furthermore, the first color conversion layer is sandwiched between the first display element and the first absorption layer; the first color conversion layer converts the first light into second light; and the second light has a spectrum including a high proportion of light with a long wavelength compared with the first light.
    Type: Application
    Filed: May 29, 2019
    Publication date: July 22, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tsunenori SUZUKI, Yasuhiro NIIKURA, Tomoya HIROSE, Satoshi SEO
  • Publication number: 20210226146
    Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having low drive voltage is provided. Provided is a light-emitting element which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes. A combination of the first organic compound and the second organic compound forms an exciplex (excited complex). An emission spectrum of the exciplex overlaps with an absorption band located on the longest wavelength side of an absorption spectrum of the phosphorescent compound. A peak wavelength of the emission spectrum of the exciplex is longer than or equal to a peak wavelength of the absorption band located on the longest wavelength side of the absorption spectrum of the phosphorescent compound.
    Type: Application
    Filed: April 5, 2021
    Publication date: July 22, 2021
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Satoshi Seo, Satoko Shitagaki, Nobuharu Ohsawa, Hideko Inoue, Kunihiko Suzuki
  • Publication number: 20210214381
    Abstract: Providing a novel organometallic complex represented by Structure Formula (G1). A1 to A4 independently represent an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms. R1 to R5 independently represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, and a cyano group, wherein at least one of R1 to R5 represents a cyano group. R11 to R14 independently represent an alkyl group having 2 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms. R15 and R16 independently represent any one of hydrogen, a methyl group, and an ethyl group. Note that R11 and R12 may be bonded to each other to form a ring, and R13 and R14 may be bonded to each other to form a ring.
    Type: Application
    Filed: December 30, 2020
    Publication date: July 15, 2021
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Tomoya YAMAGUCHI, Hideko YOSHIZUMI, Yuta KAWANO, Takeyoshi WATABE, Satoshi SEO
  • Patent number: 11063232
    Abstract: An object is to provide a light-emitting element which uses a plurality of kinds of light-emitting dopants and has high emission efficiency. In one embodiment of the present invention, a light-emitting device, a light-emitting module, a light-emitting display device, an electronic device, and a lighting device each having reduced power consumption by using the above light-emitting element are provided. Attention is paid to Förster mechanism, which is one of mechanisms of intermolecular energy transfer. Efficient energy transfer by Förster mechanism is achieved by making an emission wavelength of a molecule which donates energy overlap with a local maximum peak on the longest wavelength side of a graph obtained by multiplying an absorption spectrum of a molecule which receives energy by a wavelength raised to the fourth power.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: July 13, 2021
    Inventors: Shunpei Yamazaki, Satoshi Seo, Yoshiharu Hirakata, Takahiro Ishisone
  • Patent number: 11063225
    Abstract: A highly reliable light-emitting element having high emission efficiency is provided. The light-emitting element includes a light-emitting layer including a first organic compound and a guest material. The first organic compound has a substituted or unsubstituted carbazole skeleton. In the light-emitting layer, the weight ratio of a hydrocarbon group substitution product in which at least one of hydrogen atoms in the first organic compound is substituted by a hydrocarbon group having 1 to 6 carbon atoms to the first organic compound is greater than 0 and less than or equal to 0.1.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: July 13, 2021
    Inventors: Takeyoshi Watabe, Satoshi Seo, Nozomi Komatsu, Ryohei Yamaoka, Harue Osaka, Kunihiko Suzuki, Shunsuke Hosoumi
  • Publication number: 20210206775
    Abstract: Provided is a novel organic compound, a benzofuropyrimidine derivative or a benzothienopyrimidine derivative, which is an organic compound represented by General Formula (G1) below. In General Formula (G1), Q represents oxygen or sulfur. Furthermore, A is a group having 12 to 100 carbon atoms in total and includes one or more of a benzene ring, a naphthalene ring, a fluorene ring, a phenanthrene ring, a triphenylene ring, a heteroaromatic ring including a dibenzothiophene ring, a heteroaromatic ring including a dibenzofuran ring, a heteroaromatic ring including a carbazole ring, a benzimidazole ring, and a triphenylamine structure.
    Type: Application
    Filed: May 21, 2019
    Publication date: July 8, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satomi WATABE, Hideko YOSHIZUMI, Satoshi SEO, Hiromitsu KIDO, Toshiki SASAKI
  • Publication number: 20210206767
    Abstract: A novel compound is provided. The novel compound is represented by General Formula (G1). Each of A1 and A2 independently represents a substituted or unsubstituted condensed aromatic ring, a substituted or unsubstituted condensed heteroaromatic ring, or a structure represented by Formula (Z-1) or (Z-2); and each of Z1 and Z2 independently has a structure represented by Formula (Z-1) or (Z-2). Each of X1 and X2 independently represents any one of an alkyl group, a cycloalkyl group, a substituted or unsubstituted cycloalkyl group having a bridge structure, and a trialkylsilyl group. Each of Ar1 and Ar2 independently represents a substituted or unsubstituted aromatic hydrocarbon group, and at least one of Ar1 and Ar2 includes the same substituent as X1. Each of R1 to R16 independently represents any one of hydrogen, an alkyl group, a substituted or unsubstituted cycloalkyl group, a trialkylsilyl group, and a substituted or unsubstituted aryl group.
    Type: Application
    Filed: December 23, 2020
    Publication date: July 8, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takuya HARUYAMA, Nobuharu OHSAWA, Satoshi SEO
  • Publication number: 20210210692
    Abstract: A light-emitting element containing a light-emitting material with high light emission efficiency is provided. The light-emitting element includes a high molecular material and a guest material. The high molecular material includes at least a first high molecular chain and a second high molecular chain. The guest material has a function of exhibiting fluorescence or converting triplet excitation energy into light emission. The first high molecular chain and the second high molecular chain each include a first skeleton, a second skeleton, and a third skeleton, and the first skeleton and the second skeleton are bonded to each other through the third skeleton. The first high molecular chain and the second high molecular chain have a function of forming an excited complex.
    Type: Application
    Filed: March 1, 2021
    Publication date: July 8, 2021
    Inventors: Satoshi SEO, Nobuharu OHSAWA
  • Publication number: 20210202866
    Abstract: A light-emitting element which includes a plurality of light-emitting layers between a pair of electrodes and has low driving voltage and high emission efficiency is provided. A light-emitting element including first to third light-emitting layers between a cathode and an anode is provided. The first light-emitting layer includes a first phosphorescent material and a first electron-transport material; the second light-emitting layer includes a second phosphorescent material and a second electron-transport material; the third light-emitting layer includes a fluorescent material and a third electron-transport material; the first to third light-emitting elements are provided in contact with an electron-transport layer positioned on a cathode side; and a triplet excitation energy level of a material included in the electron-transport layer is lower than triplet excitation energy levels of the first electron-transport material and the second electron-transport material.
    Type: Application
    Filed: March 11, 2021
    Publication date: July 1, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tsunenori Suzuki, Naoaki HASHIMOTO, Eriko SAIJO, Satoshi SEO
  • Patent number: 11046667
    Abstract: Provided is a novel aromatic amine derivative represented by General Formula (G1) below. (In the formula, A represents oxygen or sulfur, and R1 to R7 individually represent any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, and a substituted or unsubstituted biphenyl group. In addition, ?1 and ?2 individually represent a substituted or unsubstituted phenylene group. Further, Ar1 represents a substituted or unsubstituted condensed aromatic hydrocarbon having 14 to 18 carbon atoms included in a ring. Further, Ar2 represents a substituted or unsubstituted aryl group having 6 to 13 carbon atoms included in a ring. Further, j and n are individually 0 or 1, and p is 1 or 2.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: June 29, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kaori Ogita, Tsunenori Suzuki, Satoshi Seo
  • Patent number: 11049908
    Abstract: A multicolor light-emitting element that utilizes fluorescence and phosphorescence and is advantageous for practical application is provided. The light-emitting element has a stacked-layer structure of a first light-emitting layer containing a host material and a fluorescent substance and a second light-emitting layer containing two kinds of organic compounds and a substance that can convert triplet excitation energy into luminescence. Note that light emitted from the first light-emitting layer has an emission peak on the shorter wavelength side than light emitted from the second light-emitting layer.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: June 29, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takahiro Ishisone, Satoshi Seo, Yusuke Nonaka, Nobuharu Ohsawa
  • Patent number: 11050032
    Abstract: A light-emitting element that includes a fluorescent material and has a high emission efficiency is provided. A light-emitting element in which a delayed fluorescence component due to TTA accounts for a high proportion of emissive components is provided. A novel light-emitting device with a high emission efficiency and a low power consumption is provided. A light-emitting element includes an anode, a cathode, and an EL layer. The EL layer includes a light-emitting layer including a host material and an electron-transport layer including a first material in contact with the light-emitting layer. The LUMO level of the first material is lower than that of the host material. The proportion of a delayed fluorescence component due to TTA is greater than or equal to 10 percent of the light emission from the EL layer. The proportion of the delayed fluorescence component due to TTA may be greater than or equal to 15 percent of the light emission.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: June 29, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Naoaki Hashimoto, Tsunenori Suzuki, Satoshi Seo, Hiromi Seo, Hiromitsu Kido
  • Publication number: 20210193945
    Abstract: An object of one embodiment of the present invention is to provide a multicolor light-emitting element that utilizes fluorescence and phosphorescence and is advantageous for practical application. The light-emitting element has a stacked-layer structure of a first light-emitting layer containing a host material and a fluorescent substance, a separation layer containing a substance having a hole-transport property and a substance having an electron-transport property, and a second light-emitting layer containing two kinds of organic compounds that form an exciplex and a substance that can convert triplet excitation energy into luminescence. Note that a light-emitting element in which light emitted from the first light-emitting layer has an emission spectrum peak on the shorter wavelength side than an emission spectrum peak of the second light-emitting layer is more effective.
    Type: Application
    Filed: February 18, 2021
    Publication date: June 24, 2021
    Inventors: Nobuharu OHSAWA, Yusuke NONAKA, Takahiro ISHISONE, Satoshi SEO, Takuya KAWATA
  • Publication number: 20210193943
    Abstract: An object is to provide a light-emitting element with high emission efficiency. The light-emitting element contains first to third organic compounds. The first organic compound has a function of converting triplet excitation energy into light. The second organic compound has a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton. The third organic compound is a fluorescent compound. Light emitted from the light-emitting element is light emitted from the third organic compound that receives excitation energy from the first organic compound or from an exciplex formed by the first and second organic compounds.
    Type: Application
    Filed: October 18, 2018
    Publication date: June 24, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Nobuharu Ohsawa, Satoshi SEO
  • Publication number: 20210193930
    Abstract: A novel organic compound represented by General Formula (G1) is provided. In General Formula (G1), X1 and X2 each independently represent a secondary or tertiary alkyl group having 3 to 6 carbon atoms and having a branched carbon atom which is bonded to a phenyl group. In addition, Ar1 represents a substituted or unsubstituted condensed aromatic ring skeleton having 10 to 60 carbon atoms and composed of two or more rings or a substituted or unsubstituted condensed heteroaromatic ring skeleton having 8 to 60 carbon atoms and composed of two or more rings. Furthermore, Ar2 represents a substituted or unsubstituted aryl group having 6 to 25 carbon atoms. Moreover, n represents any of 1 to 3, and in the case where n is 2 or more, two or more groups bonded to Ar1 may be identical or different.
    Type: Application
    Filed: December 9, 2020
    Publication date: June 24, 2021
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Kyoko TAKEDA, Harue OSAKA, Hiroshi KADOMA, Satoshi SEO, Tsunenori SUZUKI, Naoaki HASHIMOTO
  • Patent number: 11043637
    Abstract: A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (G0). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (G0), Ar1 and Ar2 each independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Ar3 represents a substituent including a carbazole skeleton.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: June 22, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takao Hamada, Hiromi Seo, Kanta Abe, Kyoko Takeda, Satoshi Seo