Patents by Inventor Naoaki Hashimoto

Naoaki Hashimoto 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: 20200328354
    Abstract: A light-emitting element that contains a fluorescent compound, which has high efficiency is provided. A light-emitting element in which the proportion of delayed fluorescence to the total light emitted from the light-emitting element is higher than that in a conventional light-emitting element is provided. Emission efficiency of the light-emitting element containing a fluorescent compound can be improved by increasing the probability of TTA caused by an organic compound in an EL layer, converting energy of triplet excitons, which does not contribute to light emission, into energy of singlet excitons, and making the fluorescent compound emit light by energy transfer of the singlet excitons.
    Type: Application
    Filed: June 26, 2020
    Publication date: October 15, 2020
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kunihiko Suzuki, Satoshi Seo, Harue Osaka, Tsunenori Suzuki, Naoaki Hashimoto, Kyoko Takeda
  • Patent number: 10783023
    Abstract: A recording control device, a recording control method, and a recording tape cartridge capable of estimating a lifetime of the recording tape cartridge are obtained. A recording control device reads information correlated with an error rate of reading or writing of data from or to a magnetic tape included in a recording tape cartridge, the information being recorded on a RFID tag included in the recording tape cartridge, and a measurement date of the information, and estimates a lifetime of the recording tape cartridge using the read information and the read measurement date, and the information measured at the time of using the recording tape cartridge and a measurement date.
    Type: Grant
    Filed: September 3, 2018
    Date of Patent: September 22, 2020
    Assignee: FUJIFILM CORPORATION
    Inventors: Naoaki Tokai, Hirokazu Hashimoto, Yosuke Sumiya
  • Publication number: 20200216428
    Abstract: A novel compound is provided. In addition, a light-emitting element with high emission efficiency and a long lifetime is provided. An organic compound represented by General Formula (G0), including a dibenzocarbazole skeleton and two amine skeletons. In General Formula (G0), A represents a substituted or unsubstituted dibenzocarbazole skeleton. The dibenzocarbazole skeleton and the amine skeletons may be bonded to each other through or not through an arylene group. In addition, a light-emitting element including the compound is provided.
    Type: Application
    Filed: July 30, 2018
    Publication date: July 9, 2020
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kyoko Takeda, Harue OSAKA, Satoshi SEO, Tsunenori SUZUKI, Naoaki HASHIMOTO
  • Patent number: 10700288
    Abstract: A light-emitting element that contains a fluorescent compound, which has high efficiency is provided. A light-emitting element in which the proportion of delayed fluorescence to the total light emitted from the light-emitting element is higher than that in a conventional light-emitting element is provided. Emission efficiency of the light-emitting element containing a fluorescent compound can be improved by increasing the probability of TTA caused by an organic compound in an EL layer, converting energy of triplet excitons, which does not contribute to light emission, into energy of singlet excitons, and making the fluorescent compound emit light by energy transfer of the singlet excitons.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: June 30, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kunihiko Suzuki, Satoshi Seo, Harue Osaka, Tsunenori Suzuki, Naoaki Hashimoto, Kyoko Takeda
  • Publication number: 20200185634
    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: Application
    Filed: February 14, 2020
    Publication date: June 11, 2020
    Inventors: Naoaki HASHIMOTO, Tsunenori SUZUKI, Satoshi SEO, Hiromi SEO, Hiromitsu KIDO
  • Publication number: 20200140422
    Abstract: An organic compound has a benzonaphthofuran skeleton and is represented by General Formula (G1). In General Formula (G1), A represents a pyrene skeleton. In the case where the pyrene skeleton has a substituent, the substituent is a diarylamino group including two substituted or unsubstituted aryl groups each having 6 to 13 carbon atoms, a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, an alkyl group having 1 to 7 carbon atoms, a substituted or unsubstituted monocyclic saturated hydrocarbon group having 3 to 20 carbon atoms, or a substituted or unsubstituted polycyclic saturated hydrocarbon group having 7 to 10 carbon atoms. The two aryl groups of the diarylamino group may be the same or different.
    Type: Application
    Filed: April 20, 2018
    Publication date: May 7, 2020
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takuya HARUYAMA, Sachiko KAWAKAMI, Naoaki HASHIMOTO, Yusuke TAKITA, Tsunenori SUZUKI, Satoshi SEO
  • Patent number: 10636976
    Abstract: A novel compound in which a delayed fluorescence component due to TTA accounts for a high proportion of emissive components is provided. The organic compound includes an anthracene skeleton, an arylene group, and a substituted or unsubstituted heterocyclic group including a carbazole skeleton. The anthracene skeleton and the substituted or unsubstituted heterocyclic group including the carbazole skeleton are bonded to each other through the arylene group. The anthracene skeleton includes an aryl group at the 2-position or the 3-position.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: April 28, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Tsunenori Suzuki, Tomohiro Kubota, Naoaki Hashimoto, Yusuke Takita
  • Patent number: 10613775
    Abstract: A recording control device reads tape quality information recorded on an RFID tag included in a recording tape cartridge, acquires drive quality information indicating quality of each of a plurality of tape drives that are loading targets of the recording tape cartridge, and prohibits reading or writing of data from or to the recording tape using the tape drive in a combination of which the quality is lower than predetermined quality among combinations of quality of the recording tape cartridge indicated by the read tape quality information and quality of each of the plurality of tape drives indicated by the acquired drive quality information.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: April 7, 2020
    Assignee: FUJIFILM CORPORATION
    Inventors: Naoaki Tokai, Hirokazu Hashimoto, Yosuke Sumiya
  • 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: 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
  • Publication number: 20190393420
    Abstract: A novel organic compound is provided. An organic compound that emits light with high chromaticity is provided. An organic compound that emits blue light with high chromaticity is provided. An organic compound with high emission efficiency is provided. An organic compound having an excellent hole-transport property is provided. An organic compound having high reliability is provided. An organic compound that has a naphtho[2,3-b;7,6-b?]bisbenzofuran skeleton or a naphtho[2,3-b;7,6-b?]bisbenzothiophene skeleton and has a molecular weight of less than or equal to 5000 is provided. The present inventors have found that the organic compound is a significantly effective skeleton as a luminophor of a light-emitting element. The organic compound has high emission efficiency and exhibits favorable blue light emission; thus, a light-emitting element using the organic compound can be a blue light-emitting element with high emission efficiency.
    Type: Application
    Filed: March 8, 2018
    Publication date: December 26, 2019
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Kyoko TAKEDA, Harue OSAKA, Satoshi SEO, Tsunenori SUZUKI, Naoaki HASHIMOTO, Yusuke TAKITA
  • Publication number: 20190372045
    Abstract: A novel light-emitting element is provided. A light-emitting element with a long lifetime is provided. A light-emitting element with high emission efficiency is provided. In the light-emitting element, an EL layer includes a hole-injection layer, a first hole-transport layer, a second hole-transport layer, a third hole-transport layer, a light-emitting layer, a first electron-transport layer, and a second electron-transport layer in this order; the hole-injection layer includes an organic acceptor; the LUMO level of the host material is higher than that of the first electron-transport layer; the LUMO level of the second electron-transport layer is higher than that of the first electron-transport layer; the host material is a substance including a condensed aromatic ring skeleton; and the first and second electron-transport layers each include a substance having a heteroaromatic ring skeleton.
    Type: Application
    Filed: August 15, 2019
    Publication date: December 5, 2019
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Tsunenori SUZUKI, Yusuke TAKITA, Naoaki HASHIMOTO
  • Publication number: 20190341551
    Abstract: In an organic compound, two groups each including a benzonaphthofuranylamine skeleton are bonded to a central skeleton including a fluorene skeleton. The organic compound emits favorable blue light. Furthermore, the organic compound has a high hole-transport property.
    Type: Application
    Filed: July 17, 2019
    Publication date: November 7, 2019
    Inventors: Kaori OGITA, Sachiko KAWAKAMI, Tsunenori SUZUKI, Naoaki HASHIMOTO, Yusuke TAKITA, Satoshi SEO
  • Patent number: 10439146
    Abstract: In an organic compound, two groups each including a benzonaphthofuranylamine skeleton are bonded to a central skeleton including a fluorene skeleton. The organic compound emits favorable blue light. Furthermore, the organic compound has a high hole-transport property.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: October 8, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kaori Ogita, Sachiko Kawakami, Tsunenori Suzuki, Naoaki Hashimoto, Yusuke Takita, Satoshi Seo
  • Patent number: 10388900
    Abstract: A novel light-emitting element is provided. A light-emitting element with a long lifetime is provided. A light-emitting element with high emission efficiency is provided. In the light-emitting element, an EL layer includes a hole-injection layer, a first hole-transport layer, a second hole-transport layer, a third hole-transport layer, a light-emitting layer, a first electron-transport layer, and a second electron-transport layer in this order; the hole-injection layer includes an organic acceptor; the LUMO level of the host material is higher than that of the first electron-transport layer; the LUMO level of the second electron-transport layer is higher than that of the first electron-transport layer; the host material is a substance including a condensed aromatic ring skeleton; and the first and second electron-transport layers each include a substance having a heteroaromatic ring skeleton.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: August 20, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Tsunenori Suzuki, Yusuke Takita, Naoaki Hashimoto
  • Publication number: 20190237682
    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: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Tsunenori SUZUKI, Naoaki HASHIMOTO
  • Patent number: 10263194
    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: May 13, 2016
    Date of Patent: April 16, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Seo, Tsunenori Suzuki, Naoaki Hashimoto
  • Patent number: 10207992
    Abstract: A novel dibenzocarbazole compound with which a light-emitting element having low power consumption, high reliability, and high color purity can be fabricated is provided. In the dibenzocarbazole compound, an aryl group which has 14 to 30 carbon atoms and at least an anthracene skeleton is bonded to nitrogen of a dibenzo[a,g]carbazole skeleton or a dibenzo[a,i]carbazole skeleton. Furthermore, a light-emitting element including the dibenzocarbazole compound is provided.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: February 19, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hiroki Suzuki, Satoshi Seo, Tsunenori Suzuki, Naoaki Hashimoto
  • Publication number: 20190036036
    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: Application
    Filed: October 4, 2018
    Publication date: January 31, 2019
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kyoko Takeda, Harue OSAKA, Yusuke TAKITA, Naoaki HASHIMOTO, Tsunenori SUZUKI, Kunihiko SUZUKI, Satoshi SEO
  • Patent number: 10096783
    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: July 18, 2017
    Date of Patent: October 9, 2018
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kyoko Takeda, Harue Osaka, Yusuke Takita, Naoaki Hashimoto, Tsunenori Suzuki, Kunihiko Suzuki, Satoshi Seo