Patents by Inventor Takeyoshi Watabe

Takeyoshi Watabe 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: 20220140250
    Abstract: A novel light-emitting device, a novel light-emitting apparatus, a novel electronic device, a novel display device, and a novel lighting device which are highly convenient, useful, or reliable are provided. The light-emitting device includes a first electrode, a second electrode, a first layer, and a second layer. The second electrode includes a region overlapping with the first electrode, the first layer includes a region sandwiched between the first electrode and the second electrode, the first layer includes a light-emitting material, the light-emitting material has a function of emitting photoluminescent light in a solution, the photoluminescent light has a first spectrum, the first spectrum has a maximum peak at a wavelength ?1, and the wavelength ?1 is in the range greater than or equal to 440 nm and less than or equal to 470 nm.
    Type: Application
    Filed: November 2, 2021
    Publication date: May 5, 2022
    Inventors: Yuta KAWANO, Takeyoshi WATABE, Airi UEDA, Nobuharu OHSAWA, Keito TOSU, Harue OSAKA, Ryo NARUKAWA, Satoshi SEO
  • Patent number: 11276824
    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: Grant
    Filed: March 4, 2019
    Date of Patent: March 15, 2022
    Inventors: Miki Kanamoto, Takeyoshi Watabe, Hideko Inoue, Satoshi Seo, Satomi Mitsumori, Tatsuyoshi Takahashi
  • Publication number: 20220077391
    Abstract: A light-emitting device with high emission efficiency and low driving voltage is provided. A light-emitting apparatus, an electronic device, and a lighting device with low power consumption are provided. The following organic compound is provided: the organic compound has an arylamine structure; and when the organic compound is deposited to be a film, the ordinary refractive index of the deposited film with respect to light with a wavelength of 458 nm is greater than or equal to 1.50 and less than or equal to 1.75, the birefringence ?n of the deposited film with respect to light with a wavelength of 458 nm is greater than or equal to 0 and less than or equal to 0.008, or the alignment order parameter of the deposited film with respect to light with a wavelength corresponding to the longest wavelength where an absorption peak appears in the absorption spectrum is greater than or equal to ?0.07 and less than or equal to 0.00.
    Type: Application
    Filed: August 26, 2021
    Publication date: March 10, 2022
    Inventors: Nobuharu OHSAWA, Satoshi SEO, Takeyoshi WATABE, Airi UEDA, Tomohiro KUBOTA, Takashi HIRAHARA
  • Publication number: 20220069258
    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: Application
    Filed: February 24, 2020
    Publication date: March 3, 2022
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeyoshi Watabe, Airi UEDA, Nobuharu OHSAWA, Satoshi SEO
  • Publication number: 20220069025
    Abstract: A display device that has a function of emitting visible light and infrared light and a function of detecting light. The display device is a display device including a first light-emitting device, a second light-emitting device, and a light-receiving device, in a display portion. The first light-emitting device includes a first pixel electrode, a first optical adjustment layer, a first light-emitting layer, a second light-emitting layer, and a common electrode. The second light-emitting device includes a second pixel electrode, a second optical adjustment layer, the first light-emitting layer, the second light-emitting layer, and the common electrode. The light-receiving device includes a third pixel electrode, an active layer, and the common electrode. The active layer includes an organic compound. The first light-emitting device emits infrared light emitted by the first light-emitting layer. The second light-emitting device emits visible light emitted by the second light-emitting layer.
    Type: Application
    Filed: December 19, 2019
    Publication date: March 3, 2022
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei YAMAZAKI, Daisuke KUBOTA, Nobuharu OHSAWA, Takeyoshi WATABE, Taisuke KAMADA
  • Publication number: 20220041635
    Abstract: An organometallic complex having an emission peak in a long wavelength region (a visible region having a wavelength of 700 nm or greater or a near-infrared region) is provided. The organometallic complex has a structure represented by General Formula (G1), in which a ligand having a quinoxaline skeleton is coordinated to a central metal, and an electron-withdrawing group (e.g., fluorine, a cyano group, a trifluoromethyl group, a trifluoromethylsulfonyl group, or a pentafluorosulfanyl group) is included as a substituent at at least one substitutable position of the benzene ring of the quinoxaline skeleton of the ligand.
    Type: Application
    Filed: December 16, 2019
    Publication date: February 10, 2022
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tomoka HARA, Hideko YOSHIZUMI, Takeyoshi WATABE, Airi UEDA, Satoshi SEO
  • Publication number: 20220029134
    Abstract: A novel light-emitting device with a microcavity structure which can improve the emission efficiency compared to the conventional one is provided. In a light-emitting device with a microcavity structure that emits light in a near-infrared range, reflectance of one or both of a first electrode (reflective electrode) and a second electrode (semi-transmissive and semi-reflective electrode) with respect to light in a near-infrared range (e.g., light with a wavelength of 850 nm) is higher than the reflectance thereof with respect to light in a visible light range (greater than or equal to 400 nm and less than 750 nm).
    Type: Application
    Filed: November 27, 2019
    Publication date: January 27, 2022
    Inventors: Takeyoshi WATABE, Airi UEDA, Nobuharu OHSAWA, Satoshi SEO
  • Publication number: 20220029121
    Abstract: A display apparatus having a function of emitting visible light and infrared light and a light detection function is provided. The display apparatus includes a first light-emitting device, a second light-emitting device, and a light-receiving device in a display portion. The first light-emitting device emits both visible light and infrared light and the second light-emitting device emits visible light. The light-receiving device has a function of absorbing at least part of visible light and infrared light. The first light-emitting device includes a first pixel electrode, a first light-emitting layer, a second light-emitting layer, and a common electrode. The second light-emitting device includes a second pixel electrode, a third light-emitting layer, and the common electrode. The light-receiving device includes a third pixel electrode, an active layer, and the common electrode. The first light-emitting layer includes a light-emitting material emitting infrared light.
    Type: Application
    Filed: December 12, 2019
    Publication date: January 27, 2022
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei YAMAZAKI, Daisuke KUBOTA, Nobuharu OHSAWA, Takeyoshi WATABE, Taisuke KAMADA
  • Publication number: 20220013736
    Abstract: To provide a light-emitting element with high emission efficiency and low driving voltage. The light-emitting element includes a guest material and a host material. A LUMO level of the host material is higher than a LUMO level of the host material, and a HOMO level of the guest material is lower than a HOMO level of the host material. The guest material has a function of converting triplet excitation energy into light emission. The difference between a singlet excitation energy level and a triplet excitation energy level of the host material is greater than 0 eV and less than or equal to 0.2 eV. The energy difference between the LUMO level and the HOMO level of the host material is larger than or equal to light emission energy of the guest material.
    Type: Application
    Filed: September 27, 2021
    Publication date: January 13, 2022
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Takeyoshi WATABE, Satoshi SEO, Satomi MITSUMORI
  • Publication number: 20210395245
    Abstract: An object is to provide an organic compound with a low refractive index. Alternatively, a novel organic compound with a low refractive index and an electron-donating property is provided. Alternatively, an EL device with high emission efficiency is provided. An organic compound having an arylamine skeleton including a fluorine atom or an acridine skeleton including a fluorine atom and an EL device using the organic compound are provided. The EL device preferably includes a hole-injection layer containing the organic compound having an arylamine skeleton including a fluorine atom or an acridine skeleton including a fluorine atom and a substance showing an electron-accepting property with respect to the organic compound.
    Type: Application
    Filed: November 12, 2019
    Publication date: December 23, 2021
    Inventors: Takeyoshi WATABE, Tomohiro KUBOTA, Satoshi SEO
  • Publication number: 20210384442
    Abstract: A light-emitting device with high outcoupling efficiency is provided. In the light-emitting device including a light-emitting layer between a pair of electrodes, a low refractive index layer containing an organic compound and an inorganic compound is provided between the light-emitting layer and an anode or between the light-emitting layer and a cathode, and the low refractive index layer has a refractive index of less than or equal to 1.80 at a wavelength of light extracted from the light-emitting layer.
    Type: Application
    Filed: September 5, 2018
    Publication date: December 9, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeyoshi Watabe, Ryohei YAMAOKA, Satoshi SEO, Nobuharu OHSAWA
  • Patent number: 11177325
    Abstract: Providing a light-emitting element emitting light in a broad emission spectrum. A combination of a first organic compound and a second organic compound forms an exciplex. The first organic compound has a function of converting triplet-excitation energy into light emission. The lowest triplet excitation level of the second organic compound is higher than or equal to the lowest triplet excitation level of the first organic compound, and the lowest triplet excitation level of the first organic compound is higher than or equal to the lowest triplet excitation level of the exciplex. Light emission from a light-emitting layer includes light emission from the first organic compound and light emission from the exciplex.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: November 16, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeyoshi Watabe, Satomi Mitsumori, Nobuharu Ohsawa, Harue Osaka, Kunihiko Suzuki, Satoshi Seo
  • Publication number: 20210336156
    Abstract: A novel organometallic complex is provided. One embodiment of the present invention provides a novel organometallic complex having a high quantum yield. An Ir complex has a structure including a 1H-naphtho[1,2-d]imidazole skeleton as a ligand and being represented by General Formula (G-1) below. Of Ns included in the 1H-naphtho[1,2-d]imidazole skeleton, N that is not bonded to Ir is bonded to a substituted or unsubstituted aryl group. In General Formula (G-1), each of R1 to R10 independently represents any of hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 7 carbon atoms, a substituted or unsubstituted aryl group having 6 to 25 carbon atoms, and an electron-withdrawing group, and Ar represents a substituted or unsubstituted aryl group having 6 to 25 carbon atoms.
    Type: Application
    Filed: July 29, 2019
    Publication date: October 28, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yui Yoshiyasu, Hideko YOSHIZUMI, Takeyoshi WATABE, Satoshi SEO
  • Publication number: 20210336176
    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: Application
    Filed: April 22, 2021
    Publication date: October 28, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yuta KAWANO, Airi UEDA, Takeyoshi WATABE, Nobuharu OHSAWA, Keito TOSU, Harue OSAKA, Satoshi SEO, Ryo NARUKAWA, Shiho NOMURA
  • Publication number: 20210336151
    Abstract: A light-emitting device material with a low refractive index is provided. The light-emitting device material contains an organic compound which has a pyridine skeleton, a diazine skeleton, or a triazine skeleton and in which the proportion of carbon atoms forming a bond by sp3 hybrid orbitals is within a certain range. The light-emitting device material contains an organic compound including at least one six-membered heteroaromatic ring having 1 to 3 nitrogen atoms and a plurality of aromatic hydrocarbon rings each having 6 to 14 carbon atoms in a ring. At least two of the plurality of aromatic hydrocarbon rings are benzene rings. The organic compound has a plurality of hydrocarbon groups forming a bond by the sp3 hybrid orbitals. The ordinary refractive index of a layer containing the organic compound with respect to light with a wavelength in the range from 455 nm to 465 nm is 1.5 to 1.75.
    Type: Application
    Filed: April 26, 2021
    Publication date: October 28, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Keito Tosu, Yuta Kawano, Hiroshi Kadoma, Harue Osaka, Ryo Narukawa, Airi Ueda, Takeyoshi Watabe, Nobuharu Ohsawa, Satoshi Seo
  • Publication number: 20210320267
    Abstract: The emission efficiency of a light-emitting device that emits near-infrared light is increased. The reliability of a light-emitting device that emits near-infrared light is increased. A light-emitting device using an organic compound that emits light having a maximum peak wavelength greater than or equal to 760 nm and less than or equal to 900 nm is provided. An organometallic complex represented by General Formula (G1) is provided. In the formula, each of R1 to R11 independently represents hydrogen or an alkyl group having 1 to 6 carbon atoms; at least two of R1 to R4 and at least two of R5 to R9 represent an alkyl group having 1 to 6 carbon atoms; X represents a substituted or unsubstituted benzene ring or naphthalene ring; n is 2 or 3; and L represents a monoanionic ligand.
    Type: Application
    Filed: September 17, 2019
    Publication date: October 14, 2021
    Inventors: Satoshi SEO, Tomoya YAMAGUCHI, Hideko YOSHIZUMI, Takeyoshi WATABE
  • Publication number: 20210317069
    Abstract: To provide a novel arylamine compound with a low refractive index. The provided arylamine compound includes at least one aromatic group. The aromatic group includes a first benzene ring, a second benzene ring, a third benzene ring, and at least three alkyl groups. The first benzene ring, the second benzene ring, and the third benzene ring are directly bonded in this order. The first benzene ring is bonded to nitrogen of amine. The first benzene ring may further include a substituted or unsubstituted phenyl group. The second benzene ring or the third benzene ring may further include an alkylated phenyl group. Each of first positions and third positions of two or more of the first to third benzene rings is independently bonded to another benzene ring, a benzene ring of the alkylated phenyl group, any of the at least three alkyl groups, or the nitrogen of the amine.
    Type: Application
    Filed: March 26, 2021
    Publication date: October 14, 2021
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Satoshi SEO, Nobuharu OHSAWA, Tomohiro KUBOTA, Takeyoshi WATABE, Airi UEDA, Yasushi KITANO, Takao TOSU
  • Patent number: 11145827
    Abstract: To provide a light-emitting element with high emission efficiency and low driving voltage. The light-emitting element includes a guest material and a host material. A LUMO level of the host material is higher than a LUMO level of the host material, and a HOMO level of the guest material is lower than a HOMO level of the host material. The guest material has a function of converting triplet excitation energy into light emission. The difference between a singlet excitation energy level and a triplet excitation energy level of the host material is greater than 0 eV and less than or equal to 0.2 eV. The energy difference between the LUMO level and the HOMO level of the host material is larger than or equal to light emission energy of the guest material.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: October 12, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeyoshi Watabe, Satoshi Seo, Satomi Mitsumori
  • Patent number: 11133482
    Abstract: Provided is a light-emitting element including a fluorescence-emitting material with high emission efficiency. The light-emitting element includes a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a first organic compound, a second organic compound, and a guest material. The first organic compound has a function of emitting a thermally activated delayed fluorescence at room temperature. The guest material has a function of emitting fluorescence. A HOMO level of the first organic compound higher than or equal to a HOMO level of the second organic compound. A LUMO level of the first organic compound is lower than or equal to a LUMO level of the second organic compound.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: September 28, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Nobuharu Ohsawa, Takeyoshi Watabe
  • Publication number: 20210257562
    Abstract: An electronic device with high outcoupling efficiency or a high light-trapping effect is provided. The electronic device includes a first layer and a second layer between a first electrode and a second electrode, the first layer is included between the first electrode and the second layer, the first layer includes a first organic compound and a first substance, the refractive index of a thin film of the first organic compound is higher than or equal to 1 and lower than or equal to 1.75, the first substance has an electron-accepting property, and the second layer has a function of emitting or absorbing light.
    Type: Application
    Filed: February 11, 2021
    Publication date: August 19, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeyoshi Watabe, Satoshi Seo