Patents by Inventor Naoaki Suzuki
Naoaki Suzuki 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).
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Patent number: 11974447Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with a long lifetime is provided. A light-emitting device with low driving voltage is provided. The light-emitting device includes an anode, a cathode, and an EL layer between the anode and the cathode. The EL layer includes a hole-injection layer, a light-emitting layer, and an electron-transport layer. The hole-injection layer is positioned between the anode and the light-emitting layer. The electron-transport layer is positioned between the light-emitting layer and the cathode. The hole-injection layer contains a first substance and a second substance. The first substance is an organic compound which has a hole-transport property and a HOMO level higher than or equal to ?5.7 eV and lower than or equal to ?5.4 eV. The second substance exhibits an electron-accepting property with respect to the first substance.Type: GrantFiled: October 26, 2022Date of Patent: April 30, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Hiromi Seo, Kunihiko Suzuki, Kanta Abe, Yuji Iwaki, Naoaki Hashimoto, Tsunenori Suzuki
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Publication number: 20240124477Abstract: A novel organic compound is provided. Alternatively, an organic compound that exhibits light emission with favorable chromaticity is provided. Alternatively, an organic compound that exhibits blue light emission with favorable chromaticity is provided. Alternatively, an organic compound with favorable emission efficiency is provided. Alternatively, an organic compound having a high carrier-transport property is provided. Alternatively, an organic compound with favorable reliability is provided. An organic compound including at least one amino group in which any one of a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted carbazolyl group is boneded to any one of a substituted or unsubstituted naphthobisbenzofuran skeleton, a substituted or unsubstituted naphthobisbenzothiophene skeleton, and a substituted or unsubstituted naphthobenzofuranobenzothiophene skeleton is provided.Type: ApplicationFiled: October 23, 2023Publication date: April 18, 2024Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Kyoko Takeda, Harue Osaka, Satoshi Seo, Tsunenori Suzuki, Naoaki Hashimoto, Yusuke Takita
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Patent number: 11963430Abstract: An object is to provide a highly reliable display unit having a function of sensing light. The display unit includes a light-receiving device and a light-emitting device. The light-receiving device includes an active layer between a pair of electrodes. The light-emitting device includes a hole-injection layer, a light-emitting layer, and an electron-transport layer between a pair of electrodes. The light-receiving device and the light-emitting device share one of the electrodes, and may further share another common layer between the pair of electrodes. The hole-injection layer is in contact with an anode and contains a first compound and a second compound. The electron-transport property of the electron-transport layer is low; hence, the light-emitting layer is less likely to have excess electrons. Here, the first compound is the material having a property of accepting electrons from the second compound.Type: GrantFiled: April 14, 2023Date of Patent: April 16, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Taisuke Kamada, Ryo Hatsumi, Daisuke Kubota, Naoaki Hashimoto, Tsunenori Suzuki, Harue Osaka, Satoshi Seo
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Patent number: 11943944Abstract: A novel light-emitting device is provided. Alternatively, a light-emitting device having a long driving lifetime at high temperature 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 first layer, a second layer, a third layer, and a light-emitting layer in this order from the anode side. The first layer includes a first organic compound and a second organic compound. The second layer includes a third organic compound. The third layer includes a fourth organic compound. The light-emitting layer includes a fifth organic compound and an emission center substance. The first organic compound exhibits an electron-accepting property with respect to the second organic compound. A difference between HOMO levels of the fourth organic compound and the fifth organic compound is less than or equal to 0.24 eV.Type: GrantFiled: January 16, 2020Date of Patent: March 26, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yusuke Takita, Tsunenori Suzuki, Naoaki Hashimoto, Takumu Okuyama, Satoshi Seo
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Patent number: 11937498Abstract: A novel compound is provided. Alight-emitting device having high emission efficiency and a long lifetime is also provided. An organic compound is represented by General Formula (G2), in which a benzo[a]anthracene skeleton is bonded to the 2-position of an anthracene skeleton. In General Formula (G2), R1 to R3, R5 to R12, and R21 to R29 each 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 substituted or unsubstituted aryl group having 6 to 13 carbon atoms in a ring. Another embodiment of the present invention is a light-emitting device including the compound.Type: GrantFiled: May 22, 2019Date of Patent: March 19, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hiroshi Kadoma, Satoshi Seo, Hiroki Suzuki, Naoaki Hashimoto, Tsunenori Suzuki
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Patent number: 11937225Abstract: A communication terminal capable of determining whether or not it can perform DC, a base station, and a communication method are provided. A communication terminal (30) according to the present disclosure includes a communication unit (31) that simultaneously communicates with a master base station (10) associated with a first radio access technology and a secondary base station (20) associated with a second radio access technology, and a control unit (32) that specifies, when it is notified by the master base station (10) that it can provide dual connectivity using the second radio access technology, at least one frequency band supported by the secondary base station (20), the secondary base station being configured to provide the dual connectivity in cooperation with the master base station (10).Type: GrantFiled: March 11, 2022Date of Patent: March 19, 2024Assignee: NEC CORPORATIONInventors: Toshiyuki Tamura, Naoaki Suzuki, Hisashi Futaki
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Patent number: 11930703Abstract: 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: GrantFiled: March 8, 2018Date of Patent: March 12, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Kyoko Takeda, Harue Osaka, Satoshi Seo, Tsunenori Suzuki, Naoaki Hashimoto, Yusuke Takita
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Patent number: 11925109Abstract: A novel organic compound with favorable thermophysical properties is provided. An organic compound represented by General Formula (G1) is provided. At least one of X1 to X5 is a secondary or tertiary alkyl group having 3 to 6 carbon atoms in which a carbon atom bonded to a phenyl group branches. Each of R1 to R7 is independently any of hydrogen, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, and an unsubstituted or alkyl-substituted aryl group having 6 to 13 carbon atoms. Ar1 represents a substituted or unsubstituted condensed heteroaromatic ring skeleton having 8 to 60 carbon atoms and composed of two or more aromatic rings, and Ar2 represents a substituted or unsubstituted aryl group having 6 to 25 carbon atoms. Furthermore, n is any of 1 to 3.Type: GrantFiled: December 9, 2020Date of Patent: March 5, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Kyoko Takeda, Harue Osaka, Hiroshi Kadoma, Satoshi Seo, Tsunenori Suzuki, Naoaki Hashimoto
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Patent number: 11925097Abstract: An object is to provide a highly reliable display unit having a function of sensing light. The display unit includes a light-receiving device and a light-emitting device. The light-receiving device includes an active layer between a pair of electrodes. The light-emitting device includes a hole-injection layer, a light-emitting layer, and an electron-transport layer between a pair of electrodes. The light-receiving device and the light-emitting device share one of the electrodes, and may further share another common layer between the pair of electrodes. The hole-injection layer is in contact with an anode and contains a first compound and a second compound. The electron-transport property of the electron-transport layer is low; hence, the light-emitting layer is less likely to have excess electrons. Here, the first compound is the material having a property of accepting electrons from the second compound.Type: GrantFiled: April 14, 2023Date of Patent: March 5, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Taisuke Kamada, Ryo Hatsumi, Daisuke Kubota, Naoaki Hashimoto, Tsunenori Suzuki, Harue Osaka, Satoshi Seo
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Publication number: 20240067664Abstract: A novel organic compound that is highly convenient, useful, or reliable is to be provided. The organic compound is represented by General Formula (G0). In General Formula (G0), X and Y each independently represent an oxygen atom or a sulfur atom. Ar1 to Ar4 each independently represent an aromatic ring or a nitrogen-containing heteroaromatic ring, the aromatic ring contains 6 to 10 carbon atoms, and the nitrogen-containing heteroaromatic ring is composed only of one or more six-membered rings and contains 4 to 9 carbon atoms. R, R11, R21, R21, R22, R31, R32, R41, and R42 each independently represent hydrogen, a straight-chain alkyl group having 1 to 6 carbon atoms, a branched alkyl group having 3 to 7 carbon atoms, a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, substituted or unsubstituted diarylamine having 6 to 13 carbon atoms, or substituted or unsubstituted heteroarylamine having 3 to 18 carbon atoms.Type: ApplicationFiled: July 31, 2023Publication date: February 29, 2024Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Kyoko Takeda, Harue Osaka, Naoaki Hashimoto, Tsunenori Suzuki
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Patent number: 11917882Abstract: 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: GrantFiled: November 25, 2020Date of Patent: February 27, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Toshiki Sasaki, Tsunenori Suzuki, Sachiko Kawakami, Naoaki Hashimoto
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Patent number: 11917908Abstract: 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: GrantFiled: December 9, 2020Date of Patent: February 27, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Kyoko Takeda, Harue Osaka, Hiroshi Kadoma, Satoshi Seo, Tsunenori Suzuki, Naoaki Hashimoto
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Patent number: 11889387Abstract: A communication apparatus (10) according to the present disclosure includes a position information management unit (11) configured to manage a distribution area used in a mobile communication system and position information indicating a position of a communication terminal connected to an access system different from the mobile communication system while associating the distribution area with the position information, a communication terminal management unit (12) configured to manage the communication terminal and a distribution area to which the communication terminal belongs while associating the communication terminal with the distribution area based on positional information indicating a current position of the communication terminal, and a communication unit (13) configured to, when it receives distribution data for which the distribution area is designated as its distribution destination, transmit the distribution data, whose distribution destination has been changed to the communication terminal associType: GrantFiled: February 14, 2019Date of Patent: January 30, 2024Assignee: NEC CORPORATIONInventors: Naoaki Suzuki, Apostolos Papageorgiou
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Publication number: 20220303827Abstract: An object is to provide a control device which can control, in consideration of a traffic characteristic of an application operating between an application server and a communication terminal, traffic or a data amount transferred on a core network. A control device (10) according to the present example embodiment includes: a communication unit (12) configured to receive, via a service control device (20) which authenticates an application server (30) providing a service for a communication terminal (50), information relating to a transmittable data amount determined in the application server (30); and a control unit (11) configured to execute, by using the information relating to the transmittable data amount, traffic control on data transmitted from the communication terminal (50).Type: ApplicationFiled: June 9, 2022Publication date: September 22, 2022Applicant: NEC CorporationInventors: Hajime ZEMBUTSU, Toshiyuki Tamura, Naoaki Suzuki
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Patent number: 11425596Abstract: An object is to provide a control device which can control, in consideration of a traffic characteristic of an application operating between an application server and a communication terminal, traffic or a data amount transferred on a core network. A control device (10) according to the present example embodiment includes: a communication unit (12) configured to receive, via a service control device (20) which authenticates an application server (30) providing a service for a communication terminal (50), information relating to a transmittable data amount determined in the application server (30); and a control unit (11) configured to execute, by using the information relating to the transmittable data amount, traffic control on data transmitted from the communication terminal (50).Type: GrantFiled: August 7, 2018Date of Patent: August 23, 2022Assignee: NEC CORPORATIONInventors: Hajime Zembutsu, Toshiyuki Tamura, Naoaki Suzuki
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Publication number: 20220201685Abstract: A communication terminal capable of determining whether or not it can perform DC, a base station, and a communication method are provided. A communication terminal (30) according to the present disclosure includes a communication unit (31) that simultaneously communicates with a master base station (10) associated with a first radio access technology and a secondary base station (20) associated with a second radio access technology, and a control unit (32) that specifies, when it is notified by the master base station (10) that it can provide dual connectivity using the second radio access technology, at least one frequency band supported by the secondary base station (20), the secondary base station being configured to provide the dual connectivity in cooperation with the master base station (10).Type: ApplicationFiled: March 11, 2022Publication date: June 23, 2022Applicant: NEC CorporationInventors: Toshiyuki TAMURA, Naoaki Suzuki, Hisashi Futaki
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Patent number: 11277837Abstract: A communication terminal capable of determining whether or not it can perform DC, a base station, and a communication method are provided. A communication terminal (30) according to the present disclosure includes a communication unit (31) that simultaneously communicates with a master base station (10) associated with a first radio access technology and a secondary base station (20) associated with a second radio access technology, and a control unit (32) that specifies, when it is notified by the master base station (10) that it can provide dual connectivity using the second radio access technology, at least one frequency band supported by the secondary base station (20), the secondary base station being configured to provide the dual connectivity in cooperation with the master base station (10).Type: GrantFiled: August 7, 2018Date of Patent: March 15, 2022Assignee: NEC CORPORATIONInventors: Toshiyuki Tamura, Naoaki Suzuki, Hisashi Futaki
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Patent number: 11265705Abstract: The present disclosure aims to provide a communication system capable of achieving advanced security in a 5G communication system. The communication system according to the present disclosure includes: a communication terminal (10); an Access and Mobility Management (AMF) entity (20) configured to execute Mobility Management (MM) processing regarding the communication terminal (10); and a Session Management Function (SMF) entity (30) configured to execute Session Management (SM) processing regarding the communication terminal (10), in which the communication terminal (10) sends an MM message used in the MM processing, a first security key having been applied to the MM message, between the communication terminal and the AMF entity (20), and sends an SM message used in the SM processing, a second security key having been applied to the SM message, between the communication terminal and the SMF entity (30) via the AMF entity (20).Type: GrantFiled: January 17, 2018Date of Patent: March 1, 2022Assignee: NEC CORPORATIONInventors: Hironori Ito, Anand Raghawa Prasad, Sivabalan Arumugam, Sivakamy Lakshminarayanan, Naoaki Suzuki, Andreas Kunz
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Publication number: 20220060947Abstract: A radio communication network includes: a control plane (C-plane) node (24) located in a core network (20); a local gateway (14) located in a Radio Access Network (RAN) (10) including a base station (11). The C-plane node (24) has a C-plane of a PDN gateway and provides a first C-plane interface for communicating with a PCC entity relating to Policy and Charging Control (PCC). The local gateway (14) has a user plane of a PDN gateway and provides IP connectivity to the base station (11) to offload a particular type of traffic. The local gateway (14) further provides a second control plane interface for communicating with the C-plane node (24).Type: ApplicationFiled: November 2, 2021Publication date: February 24, 2022Applicant: NEC CorporationInventors: Takanori Iwai, Toshiyuki Tamura, Naoaki Suzuki
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Publication number: 20220046416Abstract: An object is to provide a core network device being able to efficiently perform secondary authentication to be performed for each network slice.Type: ApplicationFiled: September 25, 2019Publication date: February 10, 2022Applicant: NEC CorporationInventors: Naoaki SUZUKI, Toshiyuki TAMURA, Anand Raghawa PRASAD