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).

  • Patent number: 11569466
    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: August 15, 2019
    Date of Patent: January 31, 2023
    Inventors: Satoshi Seo, Tsunenori Suzuki, Yusuke Takita, Naoaki Hashimoto
  • Publication number: 20230025460
    Abstract: A light-emitting device with high resistance to heat in a fabrication process is provided. The light-emitting device includes an EL layer between an anode and a cathode. The EL layer includes at least a light-emitting layer and an electron-transport layer that includes a first electron-transport layer in contact with the light-emitting layer and a second electron-transport layer in contact with the first electron-transport layer. The first electron-transport layer includes a first heteroaromatic compound including at least one heteroaromatic ring. The second electron-transport layer includes a second heteroaromatic compound that includes at least one heteroaromatic ring and is different from the first heteroaromatic compound. The first heteroaromatic compound has a difference of 20° C. or less between the crystallization temperature (Tpc) of a powder state and the crystallization temperature (Ttc) of a thin film state. The second heteroaromatic compound has a difference of 100° C. or less between Tpc and Ttc.
    Type: Application
    Filed: June 28, 2022
    Publication date: January 26, 2023
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yui Yoshiyasu, Sachiko KAWAKAMI, Naoaki HASHIMOTO, Tsunenori SUZUKI, Satoshi SEO
  • Patent number: 11555030
    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: Grant
    Filed: April 20, 2018
    Date of Patent: January 17, 2023
    Inventors: Takuya Haruyama, Sachiko Kawakami, Naoaki Hashimoto, Yusuke Takita, Tsunenori Suzuki, Satoshi Seo
  • Patent number: 11513529
    Abstract: An audio system includes an audio apparatus, a charger, and a conveyer. The audio apparatus includes a sound receiver to receive ambient sound, and a battery. The charger charges the battery of the audio apparatus. The conveyer includes a motor to transport the audio apparatus.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: November 29, 2022
    Assignee: Yamaha Corporation
    Inventors: Taku Ueda, Hisashi Nagai, Naoaki Kurita, Yuji Sakurai, Hisanobu Suzuki
  • Publication number: 20220375681
    Abstract: A coil component has a magnetic element body made of resin containing magnetic particles, a coil part embedded in the magnetic element body, conductor posts which are embedded in the magnetic element body and whose one ends are connected to the coil part and the other ends are exposed from the magnetic element body, an insulating layer interposed between the conductor posts and the magnetic element body, and other insulating layers interposed between the coil part and the magnetic element body. Since the insulating layer is interposed between the conductor posts and the magnetic element body, it is possible to ensure insulation performance between the conductor posts and the magnetic element body and to prevent the occurrence of peeling therebetween.
    Type: Application
    Filed: September 24, 2020
    Publication date: November 24, 2022
    Inventors: Takuya TAKEUCHI, Yuuichi KAWAGUCHI, Masanori SUZUKI, Naoaki FUJII
  • Patent number: 11488772
    Abstract: Provided is a coil component that includes a coil part having a planar coil that includes a winding section and an insulating section covering the winding section, and a magnetic resin layer including a magnetic filler and configured to cover the coil part. The magnetic resin layer has a first magnetic resin layer that is in contact with the coil part and a second magnetic resin layer that is laminated on the first magnetic resin layer. The second magnetic resin layer constitutes a principal surface of the magnetic resin layer, and a maximum particle size of the magnetic filler contained in the second magnetic resin layer is larger than that of the magnetic filler contained in the first magnetic resin layer.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: November 1, 2022
    Assignee: TDK CORPORATION
    Inventors: Yuuichi Kawaguchi, Masanori Suzuki, Naoaki Fujii
  • Patent number: 11489133
    Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with along 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: Grant
    Filed: June 10, 2020
    Date of Patent: November 1, 2022
    Inventors: Satoshi Seo, Hiromi Seo, Kunihiko Suzuki, Kanta Abe, Yuji Iwaki, Naoaki Hashimoto, Tsunenori Suzuki
  • Patent number: 11482357
    Abstract: Disclosed herein is a coil component that includes: a magnetic element body containing magnetic powder, the magnetic element body having first and second surfaces; a coil conductor embedded in the magnetic element body; and an external terminal connected to the coil conductor and exposed on the first surface of the magnetic element body. The second surface of the magnetic element body is free from the external terminal. The first surface is greater in surface roughness than the second surface.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: October 25, 2022
    Assignee: TDK CORPORATION
    Inventors: Yuuichi Kawaguchi, Masanori Suzuki, Naoaki Fujii, Tomonaga Nishikawa
  • Patent number: 11476041
    Abstract: A coil component is provided with a coil part in which a plurality of conductor layers and a plurality of interlayer insulating layers are alternately laminated; and a sealing resin layer that covers the coil part. The conductor layers each include a spiral pattern. The interlayer insulating layers each cover an upper surface and a side surface of the spiral pattern. The recessed part is formed in the side wall surface of the interlayer insulating layer. A part of the sealing resin layer is embedded in the recessed part.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: October 18, 2022
    Assignee: TDK CORPORATION
    Inventors: Masanori Suzuki, Manabu Yamatani, Takuya Takeuchi, Ikuya Kokubo, Tomonaga Nishikawa, Naoaki Fujii, Nobuya Takahashi
  • Publication number: 20220303827
    Abstract: 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: Application
    Filed: June 9, 2022
    Publication date: September 22, 2022
    Applicant: NEC Corporation
    Inventors: Hajime ZEMBUTSU, Toshiyuki Tamura, Naoaki Suzuki
  • Patent number: 11450475
    Abstract: A coil component includes: a first magnetic resin layer in a lower area; a second magnetic resin layer in an inner diameter area surrounded by a coil pattern, an outer peripheral area that surrounds the coil pattern, and an upper area; and an insulating gap layer between the first and second magnetic resin layers. A part of the insulating gap layer positioned between the first magnetic resin layer and a part of the second magnetic resin layer positioned in the inner diameter area is curved in the axial direction. A magnetic substrate need not be used. The insulating gap layer is provided, allowing the insulating gap layer to function as a magnetic gap. The insulating gap layer is curved in the axial direction, so that a contact area between the insulating gap layer and the first and second magnetic resin layers are increased to enhance adhesion therebetween.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: September 20, 2022
    Assignee: TDK CORPORATION
    Inventors: Masanori Suzuki, Yuuichi Kawaguchi, Naoaki Fujii, Tomonaga Nishikawa
  • Patent number: 11425596
    Abstract: 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: Grant
    Filed: August 7, 2018
    Date of Patent: August 23, 2022
    Assignee: NEC CORPORATION
    Inventors: Hajime Zembutsu, Toshiyuki Tamura, Naoaki Suzuki
  • Publication number: 20220231238
    Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with a favorable 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 positioned 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 contains a hole-transport material and an electron-accepting material. The electron-transport layer contains an electron-transport material and an alkali metal itself, an alkaline earth metal itself, a compound of an alkali metal or an alkaline earth metal, or a complex thereof. The hole-injection layer has the spin density measured by an ESR method is lower than or equal to 1×1019 spins/cm3.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 21, 2022
    Inventors: Takumu OKUYAMA, Hiromi SEO, Naoaki HASHIMOTO, Yusuke TAKITA, Tsunenori SUZUKI, Satoshi SEO
  • Publication number: 20220209128
    Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with a favorable lifetime is provided. A light-emitting device with low driving voltage is provided. A light-emitting device with favorable display quality is provided. A light-emitting device that includes an anode, a cathode, and an EL layer positioned between the anode and the cathode, in which the EL layer includes a hole-injection layer, a light-emitting layer, and an electron-transport layer; in which the electron-transport layer contains an electron-transport material and an alkali metal, an alkaline earth metal, a compound of an alkali metal or an alkaline earth metal, or a complex thereof; and in which the resistivity of the hole-injection layer is within a certain range, is provided.
    Type: Application
    Filed: April 21, 2020
    Publication date: June 30, 2022
    Inventors: Takumu OKUYAMA, Hiromi SEO, Naoaki HASHIMOTO, Yusuke TAKITA, Tsunenori SUZUKI, Satoshi SEO
  • Publication number: 20220201685
    Abstract: 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: Application
    Filed: March 11, 2022
    Publication date: June 23, 2022
    Applicant: NEC Corporation
    Inventors: Toshiyuki TAMURA, Naoaki Suzuki, Hisashi Futaki
  • Patent number: 11277837
    Abstract: 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: Grant
    Filed: August 7, 2018
    Date of Patent: March 15, 2022
    Assignee: NEC CORPORATION
    Inventors: Toshiyuki Tamura, Naoaki Suzuki, Hisashi Futaki
  • Patent number: 11265705
    Abstract: 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: Grant
    Filed: January 17, 2018
    Date of Patent: March 1, 2022
    Assignee: NEC CORPORATION
    Inventors: Hironori Ito, Anand Raghawa Prasad, Sivabalan Arumugam, Sivakamy Lakshminarayanan, Naoaki Suzuki, Andreas Kunz
  • Publication number: 20220060947
    Abstract: 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: Application
    Filed: November 2, 2021
    Publication date: February 24, 2022
    Applicant: NEC Corporation
    Inventors: Takanori Iwai, Toshiyuki Tamura, Naoaki Suzuki
  • Publication number: 20220046416
    Abstract: An object is to provide a core network device being able to efficiently perform secondary authentication to be performed for each network slice.
    Type: Application
    Filed: September 25, 2019
    Publication date: February 10, 2022
    Applicant: NEC Corporation
    Inventors: Naoaki SUZUKI, Toshiyuki TAMURA, Anand Raghawa PRASAD
  • Patent number: 11153751
    Abstract: A purpose of the present disclosure is to provide a communication system that are capable of maintaining a high security level in each divided network in the case of applying network slicing to a core network. A communication system according to the present disclosure includes a subscriber-information management apparatus (10) configured to manage subscriber information of a communication terminal; and a security apparatus (20) configured to manage identification information of the communication terminal in association with security information used in at least one network slice system usable by the communication terminal. The subscriber-information management apparatus (10) acquires, using the identification information of the communication terminal and identification information of a network slice system used by the communication terminal, security information used in the network slice system used by the communication terminal from the security apparatus (20).
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: October 19, 2021
    Assignee: NEC Corporation
    Inventors: Hironori Ito, Anand Raghawa Prasad, Andreas Kunz, Naoaki Suzuki, Toshiyuki Tamura