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).

  • Patent number: 11917882
    Abstract: A light-emitting device, an electronic device, or a lighting device with low power consumption and high reliability is provided. The light-emitting device includes a first light-emitting element, a second light-emitting element, a third light-emitting element, and a fourth light-emitting element. The first to fourth light-emitting elements include the same EL layer between an anode and a cathode. The EL layer includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer contains a fluorescent substance. The peak wavelength of an emission spectrum of the fluorescent substance in a toluene solution of the fluorescent substance is 440 nm to 460 nm, preferably 440 nm to 455 nm. The second light-emitting layer contains a phosphorescent substance. The first light-emitting element exhibits blue emission. The second light-emitting element exhibits green emission. The third light-emitting element exhibits red emission.
    Type: Grant
    Filed: November 25, 2020
    Date of Patent: February 27, 2024
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Toshiki Sasaki, Tsunenori Suzuki, Sachiko Kawakami, Naoaki Hashimoto
  • Patent number: 11917840
    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: Grant
    Filed: May 10, 2019
    Date of Patent: February 27, 2024
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Toshiki Sasaki, Ryohei Yamaoka, Shiho Nomura
  • Patent number: 11917908
    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: Grant
    Filed: December 9, 2020
    Date of Patent: February 27, 2024
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kyoko Takeda, Harue Osaka, Hiroshi Kadoma, Satoshi Seo, Tsunenori Suzuki, Naoaki Hashimoto
  • Publication number: 20240065038
    Abstract: A display device in which a puddle in the vicinity of a partition of a light-emitting element is reduced when a light-emitting layer is formed by a wet process is provided. The display device includes a first anode; a second anode adjacent to the first anode in an X direction; a third anode adjacent to the first anode in a Y direction; a hole-injection layer provided across the first anode to the third anode; a partition provided over the hole-injection layer; a first light-emitting layer; a second light-emitting layer; a third light-emitting layer; and a cathode. The partition includes, in a top view, a first region positioned between the first anode and the third anode and extending in the X direction, and a second region positioned between the first anode and the second anode and extending in the Y direction. The height of the first region is larger than the height of the second region in a cross-sectional view of the partition.
    Type: Application
    Filed: January 17, 2022
    Publication date: February 22, 2024
    Inventors: Shunpei YAMAZAKI, Satoshi SEO
  • Publication number: 20240059720
    Abstract: A novel organometallic complex is provided. An organometallic complex represented by General Formula (G1) includes iridium, a first ligand, and a second ligand. Each of the first ligand and the second ligand is a cyclometalated ligand. The first ligand has a quinoline ring coordinated to the iridium. The second ligand has a pyrimidine ring coordinated to the iridium. At least one of the first ligand and the second ligand includes a substituted or unsubstituted aryl group as a substituent. The proportion of the first ligand is twice the proportion of the second ligand. (In General Formula (G1), R1 to R16 each independently represent any one of hydrogen, 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.
    Type: Application
    Filed: December 16, 2021
    Publication date: February 22, 2024
    Inventors: Hideko YOSHIZUMI, Hiromitsu KIDO, Satomi WATABE, Satoshi SEO
  • Publication number: 20240065024
    Abstract: A novel light-emitting device that is highly convenient, useful, or reliable is provided. A light-emitting device including a second electrode over a first electrode with an EL layer sandwiched therebetween is provided. The EL layer includes a light-emitting layer and an oxidation-resistant layer over the light-emitting layer. The EL layer includes a side surface. The light-emitting device includes a block layer in contact with a top surface and the side surface of the EL layer. The second electrode is in contact with the side surface of the EL layer through the block layer. The oxidation-resistant layer includes any one or a plurality of oxides of metals belonging to Group 4 to Group 8 of the periodic table and an organic compound having an electron-withdrawing group.
    Type: Application
    Filed: December 6, 2021
    Publication date: February 22, 2024
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Nobuharu OHSAWA, Satoshi SEO
  • Publication number: 20240065014
    Abstract: A light-emitting apparatus with low power consumption is provided. A light-emitting apparatus including a first light-emitting device and a first color conversion layer. The first light-emitting device includes an anode, a cathode, and an EL layer positioned between the anode and the cathode. The EL layer includes a layer including a material with a refractive index lower than or equal to 1.75 at 467 nm. The first color conversion layer includes a first substance capable of emission by absorbing light. Light emitted from the first light-emitting device enters the first color conversion layer.
    Type: Application
    Filed: October 23, 2023
    Publication date: February 22, 2024
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei YAMAZAKI, Takeyoshi WATABE, Tomohiro KUBOTA, Airi UEDA, Satoshi SEO, Nobuharu OHSAWA, Yuko KUBOTA
  • Patent number: 11910710
    Abstract: A novel organic compound with which the emission characteristics, emission efficiency, and reliability of a light-emitting element can be improved is provided. The organic compound has an imidazo[1,2-f]phenanthridine skeleton and a dibenzothiophene skeleton or a dibenzofuran skeleton bonded through an arylene group. The light-emitting element including the organic compound in a light-emitting layer shows high efficiency and low power consumption.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: February 20, 2024
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tomoya Hirose, Hiroshi Kadoma, Satoko Shitagaki, Satoshi Seo
  • Patent number: 11908976
    Abstract: An object is to provide a highly reliable light emitting device which is thin and is not damaged by external local pressure. Further, another object is to manufacture a light emitting device with a high yield by preventing defects of a shape and characteristics due to external stress in a manufacture process. A light emitting element is sealed between a first structure body in which a fibrous body is impregnated with an organic resin and a second structure body in which a fibrous body is impregnated with an organic resin, whereby a highly reliable light emitting device which is thin and has intensity can be provided. Further, a light emitting device can be manufactured with a high yield by preventing defects of a shape and characteristics in a manufacture process.
    Type: Grant
    Filed: January 13, 2023
    Date of Patent: February 20, 2024
    Inventors: Yoshiaki Oikawa, Shingo Eguchi, Mitsuo Mashiyama, Masatoshi Kataniwa, Hironobu Shoji, Masataka Nakada, Satoshi Seo
  • Publication number: 20240057422
    Abstract: A high-resolution display device is provided. A display device having both high display quality and high resolution is provided. The display device includes a plurality of first light-emitting elements and a plurality of second light-emitting elements. The first light-emitting element comprises a first pixel electrode, a first EL layer, a common layer, and a common electrode. The second light-emitting element comprises a second pixel electrode, a second EL layer, the common layer, and the common electrode. The first EL layer and the second EL layer are provided to be apart from each other, and a side surface of the first EL layer and a side surface of the second EL layer are provided to face each other. A first light-emitting unit, a first intermediate layer, and a second light-emitting unit are stacked in the first EL layer. A third light-emitting unit, a second intermediate layer, and a fourth light-emitting unit are stacked in the second EL layer.
    Type: Application
    Filed: January 19, 2022
    Publication date: February 15, 2024
    Inventors: Shunpei YAMAZAKI, Satoshi SEO, Kenichi OKAZAKI
  • Publication number: 20240057474
    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: Application
    Filed: October 4, 2023
    Publication date: February 15, 2024
    Inventors: Takao HAMADA, Hiromi SEO, Kanta ABE, Kyoko TAKEDA, Satoshi SEO
  • Patent number: 11903227
    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: May 25, 2021
    Date of Patent: February 13, 2024
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunsuke Hosoumi, Takahiro Ishisone, Tatsuyoshi Takahashi, Satoshi Seo
  • Patent number: 11903290
    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: Grant
    Filed: February 1, 2023
    Date of Patent: February 13, 2024
    Inventors: Tsunenori Suzuki, Yasuhiro Niikura, Tomoya Hirose, Satoshi Seo
  • Patent number: 11903232
    Abstract: A light-emitting device is provided. The light-emitting device includes an intermediate layer, a first light-emitting unit, and a second light-emitting unit. The intermediate layer includes a region interposed between the first light-emitting unit and the second light-emitting unit. The intermediate layer has a function of supplying an electron to one of the first light-emitting unit and the second light-emitting unit and supplying a hole to the other. The first light-emitting unit includes a first light-emitting layer, the first light-emitting layer includes a first light-emitting material, the second light-emitting unit includes a second light-emitting layer, the second light-emitting layer includes a second light-emitting material, the second light-emitting layer has a first distance from the first light-emitting layer, and the first distance is longer than or equal to 5 nm and shorter than or equal to 65 nm.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: February 13, 2024
    Inventors: Takeyoshi Watabe, Airi Ueda, Nobuharu Ohsawa, Satoshi Seo
  • Publication number: 20240049493
    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: August 11, 2023
    Publication date: February 8, 2024
    Inventors: Satoshi SEO, Hiromi SEO, Tatsuyoshi TAKAHASHI
  • Publication number: 20240049578
    Abstract: A light-emitting device with low power consumption is provided. The light-emitting apparatus including a first light-emitting device and a first color conversion layer. The first light-emitting device includes an anode, a cathode, and an EL layer between the anode and the cathode. The EL layer includes a layer including a material with an ordinary refractive index higher than or equal to 1.50 and lower than 1.75 with respect to light with a wavelength longer than or equal to 455 nm and shorter than or equal to 465 nm. The first color conversion layer includes a first substance that absorbs light and emits light. An ordinary refractive index of the first color conversion layer with respect to light with a wavelength longer than or equal to 455 nm and shorter than or equal to 465 nm is higher than or equal to 1.40 and lower than or equal to 2.10. The first color conversion layer is on an optical path of the light emitted from the first light-emitting device to an outside of the light-emitting apparatus.
    Type: Application
    Filed: September 27, 2021
    Publication date: February 8, 2024
    Inventors: Takeyoshi WATABE, Airi UEDA, Yuta KAWANO, Tomohiro KUBOTA, Nobuharu OHSAWA, Satoshi SEO
  • Patent number: 11895908
    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 proportion of a delayed fluorescence component in light emitted from the exciplex is higher than or equal to 5%, and the delayed fluorescence component contains a delayed fluorescence component whose fluorescence lifetime is 10 ns or longer and 50 ?s or shorter.
    Type: Grant
    Filed: April 5, 2022
    Date of Patent: February 6, 2024
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takahiro Ishisone, Shunsuke Hosoumi, Tatsuyoshi Takahashi, Satoshi Seo
  • Patent number: 11889712
    Abstract: A light-emitting device with high emission efficiency is provided. The light-emitting device includes an anode, a cathode, and an EL layer positioned between the anode and the cathode. The EL layer includes a light-emitting layer and an electron-transport layer; the light-emitting layer includes a light-emitting material; the electron-transport layer includes an organic compound having an electron-transport property and a metal complex of an alkali metal; the ordinary refractive index of the organic compound having an electron-transport property in a peak wavelength of light emitted from the light-emitting material is greater than or equal to 1.50 and less than or equal to 1.75; and the ordinary refractive index of the metal complex of an alkali metal in the peak wavelength of the light emitted from the light-emitting material is greater than or equal to 1.45 and less than or equal to 1.70.
    Type: Grant
    Filed: April 22, 2021
    Date of Patent: January 30, 2024
    Inventors: Yuta Kawano, Airi Ueda, Takeyoshi Watabe, Nobuharu Ohsawa, Keito Tosu, Harue Osaka, Satoshi Seo, Ryo Narukawa, Shiho Nomura
  • Patent number: 11889711
    Abstract: An object is to provide a light-emitting element capable of emitting light with a high luminance even at a low voltage, and having a long lifetime. The light-emitting element includes n EL layers between an anode and a cathode (n is a natural number of two or more), and also includes, between m-th EL layer from the anode and (m+1)-th EL layer (m is a natural number, 1?m?n?1), a first layer including a first donor material in contact with the m-th EL layer, a second layer including an electron-transport material and a second donor material in contact with the first layer, and a third layer including a hole-transport material and an acceptor material in contact with the second layer and the (m+1)-th EL layer.
    Type: Grant
    Filed: January 21, 2021
    Date of Patent: January 30, 2024
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hiromi Nowatari, Satoshi Seo, Nobuharu Ohsawa, Takahiro Ushikubo, Tetsuo Tsutsui
  • Patent number: 11889759
    Abstract: Provided is a novel light-emitting element, a light-emitting element with a long lifetime, or a light-emitting element with high emission efficiency. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer includes at least a light-emitting layer containing a fluorescent substance and a host material, a first electron-transport layer containing a first electron-transport material, and a second electron-transport layer containing a second electron-transport material, which are in contact with each other and in this order. The LUMO level of each of the host material and the second electron-transport material is higher than the LUMO level of the first electron-transport material.
    Type: Grant
    Filed: August 3, 2021
    Date of Patent: January 30, 2024
    Inventors: Satoshi Seo, Tsunenori Suzuki, Naoaki Hashimoto