Patents by Inventor Yasuhiro Sekimoto

Yasuhiro Sekimoto 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: 11700734
    Abstract: An organic electroluminescence element including an anode, a light-emitting layer, a functional layer, and a cathode stacked in this order. The light-emitting layer and the functional layer are in contact with each other. Hole mobility of the light-emitting layer is greater than electron mobility of the light-emitting layer. The electron mobility of the light-emitting layer is equal to or greater than an effective electron mobility of the functional layer. A highest occupied molecular orbital (HOMO) level of a first functional material included in the light-emitting layer is at least 0.4 eV greater than a HOMO level of a second functional material included in the functional layer.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: July 11, 2023
    Assignee: JOLED INC.
    Inventors: Toshiyuki Akiyama, Yasuhiro Sekimoto, Muneharu Sato, Shinichiro Ishino, Tomohiko Oda, Mineki Hasegawa
  • Publication number: 20220199930
    Abstract: An organic EL element including an anode, a cathode, and a light emitting layer between the anode and the cathode. The light emitting layer includes a fluorescent material and a host material. A difference between a lowest unoccupied molecular orbital (LUMO) level of the fluorescent material and a highest occupied molecular orbital (HOMO) level of the fluorescent material is less than or equal to a difference between a LUMO level and a HOMO level of the host material. The LUMO level of the fluorescent material is equal to or higher than the LUMO level of the host material. The HOMO level of the fluorescent material is equal to or higher than the HOMO level of the host material, and a difference in energy level between the HOMO level of the fluorescent material and the HOMO level of the host material is 0.3 eV or less.
    Type: Application
    Filed: December 21, 2021
    Publication date: June 23, 2022
    Applicant: JOLED Inc.
    Inventors: Yasuhiro Sekimoto, Shinichiro Ishino, Toshiyuki Akiyama, Tomohiko Oda, Muneharu Sato
  • Publication number: 20220158112
    Abstract: An organic EL element including an anode, a first functional layer including organic material, disposed above the anode, a second functional layer including organic material, disposed on and in contact with the first functional layer, a light emitting layer disposed on and in contact with the second functional layer, and a cathode disposed above the light emitting layer. A highest occupied molecular orbital (HOMO) level of the organic material of the second functional layer has an energy level at least 0.2 eV lower than that of a HOMO level of the organic material of the first functional layer, and film thickness of the second functional layer is 15 nm or less.
    Type: Application
    Filed: November 18, 2021
    Publication date: May 19, 2022
    Applicant: JOLED Inc.
    Inventors: Toshiyuki AKIYAMA, Shinichiro ISHINO, Yasuhiro SEKIMOTO, Muneharu SATO, Takeshi KAMIYA, Tomohiko ODA, Mineki HASEGAWA, Masakazu TAKATA
  • Publication number: 20210167312
    Abstract: An organic electroluminescence element including an anode, a light-emitting layer, a functional layer, and a cathode stacked in this order. The light-emitting layer and the functional layer are in contact with each other. Hole mobility of the light-emitting layer is greater than electron mobility of the light-emitting layer. The electron mobility of the light-emitting layer is equal to or greater than an effective electron mobility of the functional layer. A highest occupied molecular orbital (HOMO) level of a first functional material included in the light-emitting layer is at least 0.4 eV greater than a HOMO level of a second functional material included in the functional layer.
    Type: Application
    Filed: November 20, 2020
    Publication date: June 3, 2021
    Applicant: JOLED Inc.
    Inventors: Toshiyuki AKIYAMA, Yasuhiro SEKIMOTO, Muneharu SATO, Shinichiro ISHINO, Tomohiko ODA, Mineki HASEGAWA
  • Patent number: 10957856
    Abstract: Disclosed is a method for manufacturing an organic EL display panel in which a plurality of organic electroluminescence elements each including an organic layer are arranged on an upper side of a substrate. The method includes applying an ink obtained by dissolving or dispersing an organic material in a solvent to a preset application area over the substrate, and cooling the ink applied in the applying within a period until the ink is dried, to lower an ink temperature to a second temperature lower than a first temperature of the ink at a time of application thereof.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: March 23, 2021
    Assignee: JOLED INC.
    Inventors: Yasuhiro Yamauchi, Shinichiro Ishino, Tomohiko Oda, Mineki Hasegawa, Yasuhiro Sekimoto
  • Publication number: 20200373494
    Abstract: Disclosed is a light-emitting layer-forming ink useful in forming an organic light-emitting layer for an organic EL element by a printing process, including a tetralin-based organic solvent, and a solute including an anthracene-based, low molecular material and dissolved at a concentration of 3% or higher and 12% or lower in the tetralin-based organic solvent.
    Type: Application
    Filed: May 19, 2020
    Publication date: November 26, 2020
    Applicant: JOLED Inc.
    Inventors: Tomohiko ODA, Shinichiro ISHINO, Toshiyuki AKIYAMA, Mineki HASEGAWA, Yasuhiro SEKIMOTO, Muneharu SATO
  • Publication number: 20200365820
    Abstract: Provided is an organic electroluminescent element obtained by stacking an anode, a light emitting layer, an electron transport layer, and a cathode in that order, the organic electroluminescent element including an electron injection control layer in contact with both the light emitting layer and the electron transport layer, in which the light emitting layer contains a fluorescent material as a luminescent material, a lowest unoccupied molecular orbital level of a functional material contained in the electron injection control layer is higher than a lowest unoccupied molecular orbital level of a functional material contained in the electron transport layer by 0.1 eV or higher, and the lowest unoccupied molecular orbital level of the functional material contained in the electron injection control layer is equal to or higher than a lowest unoccupied molecular orbital level of a functional material contained in the light emitting layer.
    Type: Application
    Filed: May 15, 2020
    Publication date: November 19, 2020
    Applicant: JOLED Inc.
    Inventors: Yasuhiro SEKIMOTO, Toshiyuki Akiyama, Muneharu Sato, Shinichiro Ishino, Tomohiko Oda, Mineki Hasegawa
  • Publication number: 20190372542
    Abstract: A sub wiring pattern (21) branches from a first branching portion (20a) of a main wiring pattern (20), and connects to the main wiring pattern (20) at a second branching portion (20b). In a portion of the main wiring pattern (20) from the first branching portion (20a) to the second branching portion (20b), a resistor element (12) and a three-terminal capacitor element (13) are serially connected. The sub wiring pattern (21) is formed so that its path length is larger than a length of a path from the first branching portion (20a) to the second branching portion (20b) in the main wiring pattern (20).
    Type: Application
    Filed: February 6, 2017
    Publication date: December 5, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akihito KOBAYASHI, Naoto OKA, Hideyuki OHASHI, Yasuhiro SEKIMOTO
  • Publication number: 20190280205
    Abstract: Disclosed is a method for manufacturing an organic EL display panel in which a plurality of organic electroluminescence elements each including an organic layer are arranged on an upper side of a substrate. The method includes applying an ink obtained by dissolving or dispersing an organic material in a solvent to a preset application area over the substrate, and cooling the ink applied in the applying within a period until the ink is dried, to lower an ink temperature to a second temperature lower than a first temperature of the ink at a time of application thereof.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 12, 2019
    Inventors: YASUHIRO YAMAUCHI, SHINICHIRO ISHINO, TOMOHIKO ODA, MINEKI HASEGAWA, YASUHIRO SEKIMOTO
  • Patent number: 9570972
    Abstract: A CR snubber circuit capable of increasing a reduction effect of the effective inductance component and suppressing a ringing component generated at the time of switching the switching element is obtained. A first current path formed on one surface of the substrate and a second current path formed on the other surface, which is the opposite side of the one surface of the substrate, are opposed to each other with the substrate being sandwiched therebetween, and the capacitor 5 and the resistor 6 are arranged such that current flows in opposite directions in the first current path and the second current path, and a band elimination filter is formed by the capacitor 5, the resistor 6, and an effective inductance component obtained by coupling an inductance component included in the first current path and an inductance component included in the second current path.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: February 14, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Mitsuhiko Kanda, Shizuri Tamura, Akira Hatai, Yasuhiro Sekimoto, Yuji Nojiri, Yoshitomo Hayashi
  • Publication number: 20160344279
    Abstract: A CR snubber circuit capable of increasing a reduction effect of the effective inductance component and suppressing a ringing component generated at the time of switching the switching element is obtained. A first current path formed on one surface of the substrate and a second current path formed on the other surface, which is the opposite side of the one surface of the substrate, are opposed to each other with the substrate being sandwiched therebetween, and the capacitor 5 and the resistor 6 are arranged such that current flows in opposite directions in the first current path and the second current path, and a band elimination filter is formed by the capacitor 5, the register 6, and an effective inductance component obtained by coupling an inductance component included in the first current path and an inductance component included in the second current path.
    Type: Application
    Filed: October 2, 2013
    Publication date: November 24, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Mitsuhiko KANDA, Shizuri TAMURA, Akira HATAI, Yasuhiro SEKIMOTO, Yuji NOJIRI, Yoshitomo HAYASHI
  • Patent number: 9000475
    Abstract: A light-emitter with a bank having an upper surface located at a height of h0 with reference to the top surface of the base layer and a circumferential surface facing the aperture in the bank. When h denotes a height of a given point on the circumferential surface with reference to the top surface and x denotes a distance, measured in a direction along the top surface, of the given point from a boundary between the upper and circumferential surface, a second-order derivative of h with respect to x is continuous at a point corresponding to the boundary, h being smaller than h0. An inflection point of the second-order derivative is located at a height of 0.9h0 or greater with reference to the top surface, and a top surface of the functional layer is in contact with the circumferential surface at a contact point near the inflection point.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: April 7, 2015
    Assignee: Panasonic Corporation
    Inventor: Yasuhiro Sekimoto
  • Publication number: 20130320388
    Abstract: A light-emitter with a bank having an upper surface located at a height of h0 with reference to the top surface of the base layer and a circumferential surface facing the aperture in the bank. When h denotes a height of a given point on the circumferential surface with reference to the top surface and x denotes a distance, measured in a direction along the top surface, of the given point from a boundary between the upper and circumferential surface, a second-order derivative of h with respect to x is continuous at a point corresponding to the boundary, h being smaller than h0. An inflection point of the second-order derivative is located at a height of 0.9h0 or greater with reference to the top surface, and a top surface of the functional layer is in contact with the circumferential surface at a contact point near the inflection point.
    Type: Application
    Filed: February 27, 2013
    Publication date: December 5, 2013
    Applicant: PANASONIC CORPORATION
    Inventor: Yasuhiro SEKIMOTO
  • Patent number: 7825540
    Abstract: A power conversion device including sub-inverters, each connected in series with respective phase of a three-phase main inverter including a smoothing capacitor, which is fed from a power supply via a converter, as a DC input thereof, and feeds power to a load using the sum of outputs of the inverters. A manipulative quantity is determined so that the DC voltage at each of smoothing capacitors which is an input of each of the sub-inverters will follow a command value. The manipulative quantity is added to an output voltage command for the three-phase main inverter, and is subtracted from an output voltage command for the sub-inverters. Thus, power is shifted from the three-phase main inverter to the smoothing capacitors of the sub-inverters.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: November 2, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shinichi Ogusa, Yukimori Kishida, Akira Imanaka, Yasuhiro Sekimoto, Masaya Harakawa
  • Publication number: 20090085405
    Abstract: A power conversion device including sub-inverters, each connected in series with respective phase of a three-phase main inverter including a smoothing capacitor, which is fed from a power supply via a converter, as a DC input thereof, and feeds power to a load using the sum of outputs of the inverters. A manipulative quantity is determined so that the DC voltage at each of smoothing capacitors which is an input of each of the sub-inverters will follow a command value. The manipulative quantity is added to an output voltage command for the three-phase main inverter, and is subtracted from an output voltage command for the sub-inverters. Thus, power is shifted from the three-phase main inverter to the smoothing capacitors of the sub-inverters.
    Type: Application
    Filed: March 20, 2007
    Publication date: April 2, 2009
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shinichi Ogusa, Yukimori Kishida, Akira Imanaka, Yasuhiro Sekimoto, Masaya Harakawa
  • Patent number: 4000010
    Abstract: A roll and process for producing same are disclosed. This process includes the steps of: horizontally placing a core body made of a cast steel or a steel based Adamite containing from 0.5 to 2.5 %C, said core body having one or more circumferential grooves; feeding a consumable electrode wire into said groove or grooves, while rotating said core body, to thereby obtain according to an electro-slag welding process a deposited metal or metals filled in said groove or grooves, said deposited metal or metals containing from 1.5 to 2.5%C, from 0.2 to 1.0% Si, from 0.5 to 1.0% Mn, from 0.5 to 3.0 % Cr, from 0.2 to 3.0 % Mo, from 0 to 2.0 V, the balance being essentially Fe, and inevitable impurities; subjecting same to heat treatment at a temperature ranging from 500.degree. C to 700.degree.
    Type: Grant
    Filed: March 18, 1975
    Date of Patent: December 28, 1976
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yasuhiro Sekimoto, Kazuhiko Sonomoto, Norimitsu Takano