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: 20200098997
    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: Application
    Filed: December 19, 2017
    Publication date: March 26, 2020
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeyoshi WATABE, Satoshi SEO, Nozomi KOMATSU, Ryohei YAMAOKA, Harue OSAKA, Kunihiko SUZUKI, Shunsuke HOSOUMI
  • Patent number: 10600972
    Abstract: A light-emitting element which has low driving voltage and high emission efficiency, is provided. The light-emitting element includes, between a pair of electrodes, a hole-transport layer and a light-emitting layer over the hole-transport layer. The light-emitting layer contains a first organic compound having an electron-transport property, a second organic compound having a hole-transport property, and a light-emitting third organic compound converting triplet excitation energy into light emission. A combination of the first organic compound and the second organic compound forms an exciplex. The hole-transport layer contains at least a fourth organic compound whose HOMO level is lower than or equal to that of the second organic compound and a fifth organic compound whose HOMO level is higher than that of the second organic compound.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: March 24, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hiromi Seo, Satoshi Seo, Satoko Shitagaki
  • Patent number: 10600853
    Abstract: The invention relates to: a light-emitting device which includes a first flexible substrate having a first electrode, a light-emitting layer over the first electrode, and a second electrode with a projecting portion over the light-emitting layer and a second flexible substrate having a semiconductor circuit and a third electrode electrically connected to the semiconductor circuit, in which the projecting portion of the second electrode and the third electrode are electrically connected to each other; a method for manufacturing the light-emitting device; and a cellular phone which includes a housing incorporating the light-emitting device and having a longitudinal direction and a lateral direction, in which the light-emitting device is disposed on a front side and in an upper portion in the longitudinal direction of the housing.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: March 24, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kaoru Hatano, Satoshi Seo, Shunpei Yamazaki
  • Patent number: 10593895
    Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element is provided which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes, in which a combination of the first organic compound and the second organic compound forms an exciplex (excited complex). The light-emitting element transfers energy by utilizing an overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency. Therefore, a light-emitting element having high external quantum efficiency can be obtained.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: March 17, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoko Shitagaki, Satoshi Seo, Nobuharu Ohsawa, Hideko Inoue, Kunihiko Suzuki
  • Publication number: 20200083462
    Abstract: A novel organic compound is provided. That is, a novel organic compound that is effective in improving reliability of a light-emitting element is provided. The organic compound includes a condensed ring including a pyrimidine ring and is represented by General Formula (G1). In General Formula (G1), A represents a group having 6 to 100 carbon atoms and includes at least one of an aromatic ring and a heteroaromatic ring. The aromatic ring and the heteroaromatic ring may each include a substituent. Furthermore, Q represents oxygen or sulfur. A ring X represents a substituted or unsubstituted naphthalene ring or a substituted or unsubstituted phenanthrene ring.
    Type: Application
    Filed: March 7, 2018
    Publication date: March 12, 2020
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Miki KURIHARA, Hideko YOSHIZUMI, Satomi WATABE, Hiromitsu KIDO, Satoshi SEO
  • 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: 10586934
    Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element is provided which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes, in which a combination of the first organic compound and the second organic compound forms an exciplex (excited complex). The light-emitting element transfers energy by utilizing an overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency. Therefore, a light-emitting element having high external quantum efficiency can be obtained.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: March 10, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoko Shitagaki, Satoshi Seo, Nobuharu Ohsawa, Hideko Inoue, Kunihiko Suzuki
  • 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: 20200075686
    Abstract: A display device with a wide viewing angle is provided. A display device capable of displaying an image with a wide color gamut is provided. A display device includes a first light-emitting element, a second light-emitting element, and a third light-emitting element. The light-emitting elements each include a pair of electrodes and a light-emitting layer. One of the pair of electrodes includes a reflective electrode, and the other of the pair of electrodes includes a transflective electrode. The light-emitting layers of the light-emitting elements are different from each other. A first peak wavelength of the emission spectrum of the first light-emitting element is greater than or equal to 400 nm and less than or equal to 480 nm. A second peak wavelength of the emission spectrum of the second light-emitting element is greater than or equal to 580 nm and less than or equal to 700 nm.
    Type: Application
    Filed: November 7, 2019
    Publication date: March 5, 2020
    Inventors: Ryohei YAMAOKA, Satoshi SEO, Daiki NAKAMURA
  • Patent number: 10573837
    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: May 22, 2018
    Date of Patent: February 25, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Naoaki Hashimoto, Tsunenori Suzuki, Satoshi Seo, Hiromi Seo, Hiromitsu Kido
  • Patent number: 10573829
    Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element is provided which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes, in which a combination of the first organic compound and the second organic compound forms an exciplex (excited complex). The light-emitting element transfers energy by utilizing an overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency. Therefore, a light-emitting element having high external quantum efficiency can be obtained.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: February 25, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoko Shitagaki, Satoshi Seo, Nobuharu Ohsawa, Hideko Inoue, Kunihiko Suzuki
  • Patent number: 10570113
    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: April 1, 2011
    Date of Patent: February 25, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kaori Ogita, Tsunenori Suzuki, Satoshi Seo
  • Patent number: 10573693
    Abstract: Provided is a light-emitting device that can display an image with a wide color gamut or a novel light-emitting element. The light-emitting device includes a plurality of light-emitting elements each of which includes an EL layer between a pair of electrodes. Light obtained from a first light-emitting element through a first color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than 0.680 and less than or equal to 0.720 and a chromaticity y of greater than or equal to 0.260 and less than or equal to 0.320. Light obtained from a second light-emitting element through a second color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.130 and less than or equal to 0.250 and a chromaticity y of greater than 0.710 and less than or equal to 0.810. Light obtained from a third light-emitting element through a third color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.120 and less than or equal to 0.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: February 25, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka
  • Publication number: 20200052042
    Abstract: A technique of manufacturing a display device with high productivity is provided. In addition, a high-definition display device with high color purity is provided. By adjusting the optical path length between an electrode having a reflective property and a light-emitting layer by the central wavelength of a wavelength range of light passing through a color filter layer, the high-definition display device with high color purity is provided without performing selective deposition of light-emitting layers. In a light-emitting element, a plurality of light-emitting layers emitting light of different colors are stacked. The closer the light-emitting layer is positioned to the electrode having a reflective property, the shorter the wavelength of light emitted from the light-emitting layer is.
    Type: Application
    Filed: October 22, 2019
    Publication date: February 13, 2020
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Toshiki Sasaki, Nobuharu Ohsawa, Takahiro Ushikubo, Shunpei Yamazaki
  • Publication number: 20200053275
    Abstract: An image sensor includes: a photoelectric conversion unit that photoelectrically converts incident light and generates electric charge; a reflection prevention portion that prevents reflection of at least a portion of light passing through the photoelectric conversion unit; and a reflecting portion that reflects a portion of light passing through the photoelectric conversion unit toward the photoelectric conversion unit.
    Type: Application
    Filed: March 28, 2018
    Publication date: February 13, 2020
    Applicant: NIKON CORPORATION
    Inventors: Takashi SEO, Toru TAKAGI, Satoshi NAKAYAMA, Ryoji ANDO, Shutaro KATO
  • Patent number: 10556864
    Abstract: To provide a light-emitting element having high luminous efficiency and to provide a light-emitting device and an electronic device which consumes low power and is driven at low voltage, a carbazole derivative represented by the general formula (1) is provided. In the formula, ?1, ?2, ?3, and ?4 each represent an arylene group having less than or equal to 13 carbon atoms; Ar1 and Ar2 each represent an aryl group having less than or equal to 13 carbon atoms; R1 represents 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; and R2 represents any of an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, and a substituted or unsubstituted biphenyl group. In addition, l, m, and n are each independently 0 or 1.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: February 11, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hiroko Nomura, Harue Osaka, Takahiro Ushikubo, Sachiko Kawakami, Satoshi Seo, Satoko Shitagaki
  • Patent number: 10559760
    Abstract: A novel organic compound is provided. In particular, a novel organic compound which can improve the element characteristics of a light-emitting element is provided. A novel light-emitting element with high emission efficiency, low driving voltage, and high reliability is provided. An organic compound including an amine skeleton and a benzo[b]naphtho[1,2-d]furan skeleton is provided. A light-emitting element including the organic compound is provided.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: February 11, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Sachiko Kawakami, Yusuke Takita, Tsunenori Suzuki, Satoshi Seo
  • Patent number: 10559762
    Abstract: To provide a novel fluorescent organic compound (a fluorescent compound). The organic compound is a substance that emits fluorescence and an organic compound (a host material) in which TTA can occur efficiently. In the organic compound, triplet excitons, which do not contribute to light emission, can be efficiently converted into singlet excitons. The use of such an organic compound can increase emission efficiency of a light-emitting element.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: February 11, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kyoko Takeda, Harue Osaka, Yusuke Takita, Naoaki Hashimoto, Tsunenori Suzuki, Kunihiko Suzuki, Satoshi Seo
  • Patent number: 10553797
    Abstract: An object is to provide a light-emitting element having high light-emission efficiency by provision of a novel fluorene derivative as represented by General Formula (G1) below. In the formula, R1 to R8 independently represent any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group. Further, ?1 to ?4 independently represent any of a substituted or unsubstituted arylene group having 6 to 12 carbon atoms. Furthermore, Ar1 and Ar2 independently represent any of an aryl group having 6 to 13 carbon atoms in a ring and Ar3 represents an alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aryl group having 6 to 12 carbon atoms. J, k, m, and n each independently represent 0 or 1.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: February 4, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Harue Osaka, Satoko Shitagaki, Tsunenori Suzuki, Nobuharu Ohsawa, Sachiko Kawakami, Satoshi Seo
  • Publication number: 20200035940
    Abstract: Provided is a light-emitting element which has an anode, a light-emitting layer over the anode, an electron-transport layer over and in contact with the light-emitting layer, an electron-injection layer over and in contact with the electron-transport layer, and a cathode over and in contact with the electron-injection layer. The light-emitting layer has an electron-transport property, and the electron-transport layer includes an anthracene derivative. The light-emitting layer further includes a phosphorescent substance. This device structure allows the formation of a highly efficient blue-emissive light-emitting element even though the phosphorescent substance has higher triplet energy than the anthracene derivative which directly contacts with the light-emitting layer.
    Type: Application
    Filed: October 4, 2019
    Publication date: January 30, 2020
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoko Shitagaki, Takahiro Ishisone, Satoshi Seo, Takeyoshi Watabe