Patents by Inventor Naomi Nagai

Naomi Nagai 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: 20230389348
    Abstract: An organic electroluminescent element capable of emitting white light having a low color temperature and high color rendering properties with practical power efficiency includes a light-pervious substrate, a light-pervious anode layer, a light-emitting functional layer, and a metal cathode layer. The functional layer includes a green red light emitting unit, a unit connection mechanism, and a blue light emitting unit. The green red light emitting unit includes a green red mixed phosphorescent light-emitting layer containing a host material for a phosphorescent light-emitting layer, and the blue light emitting unit includes a hole transport adjustment layer adjacent to a blue fluorescent light-emitting layer on a side of the unit connection mechanism. White light can be emitted from the light emission surface with a correlated color temperature TCP of 2200 K to 3000 K and a color rendering property Ra of 80 or more.
    Type: Application
    Filed: October 27, 2021
    Publication date: November 30, 2023
    Inventor: Naomi NAGAI
  • Patent number: 10026918
    Abstract: A white light-emitting organic EL panel is high in color rendering properties and is excellent in hue stability. The panel includes a light-emitting functional layer that has a blue light anode side unit, a connection layer, and a red-green light cathode side unit. The connection layer injects electrons into the blue light anode side and injects holes into the red-green light cathode side when current is applied. The red-green light cathode side unit includes a red-green phosphorescent light-emitting layer composed of a red phosphorescent material, a green phosphorescent material, and a host material for the phosphorescent light-emitting layer. The maximum emission peak wavelength of the red and green phosphorescent materials are 60 nm or more apart, and the panel is capable of emitting white light with a general color rendering index and a special color rendering index greater than or equal to 90.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: July 17, 2018
    Assignee: Kaneka Corporation
    Inventors: Naomi Nagai, Hirotaka Umezaki
  • Publication number: 20170324056
    Abstract: A white light-emitting organic EL panel is high in color rendering properties and is excellent in hue stability. The panel includes a light-emitting functional layer that has a blue light anode side unit, a connection layer, and a red-green light cathode side unit. The connection layer injects electrons into the blue light anode side and injects holes into the red-green light cathode side when current is applied. The red-green light cathode side unit includes a red-green phosphorescent light-emitting layer composed of a red phosphorescent material, a green phosphorescent material, and a host material for the phosphorescent light-emitting layer. The maximum emission peak wavelength of the red and green phosphorescent materials are 60 nm or more apart, and the panel is capable of emitting white light with a general color rendering index and a special color rendering index greater than or equal to 90.
    Type: Application
    Filed: May 24, 2016
    Publication date: November 9, 2017
    Inventors: Naomi Nagai, Hirotaka Umezaki
  • Patent number: 8987726
    Abstract: Provided is a high-luminance, long-life laminated organic electroluminescent element. The organic electroluminescent element has a composition in which a plurality of light-emitting units, including at least one organic light-emitting layer, are laminated between a positive electrode and a negative electrode, and in which a linking layer is held between the respective light-emitting units. The linking layer is formed by laminating, in succession from the positive electrode side, an electron generating/transport section, an intermediate layer, and a hole generating/transport section, which contain at least one metal selected from a group consisting of an alkali metal, alkaline earth metal, rare earth metal, alloy of these metals, and compound of these metals. Preferably the intermediate layer contains an electrical insulating non-semiconductive substance having a specific resistance which is between 1.0×102 ?·cm and 1.0×109 ?·cm.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: March 24, 2015
    Assignee: Kaneka Corporation
    Inventors: Naomi Nagai, Masami Nishida, Nobuhito Miura, Toshio Matsumoto, Hirotaka Umezaki
  • Publication number: 20140225092
    Abstract: Provided is a high-luminance, long-life laminated organic electroluminescent element. The organic electroluminescent element has a composition in which a plurality of light-emitting units, including at least one organic light-emitting layer, are laminated between a positive electrode and a negative electrode, and in which a linking layer is held between the respective light-emitting units. The linking layer is formed by laminating, in succession from the positive electrode side, an electron generating/transport section, an intermediate layer, and a hole generating/transport section, which contain at least one metal selected from a group consisting of an alkali metal, alkaline earth metal, rare earth metal, alloy of these metals, and compound of these metals. Preferably the intermediate layer contains an electrical insulating non-semiconductive substance having a specific resistance which is between 1.0×102 ?·cm and 1.0×109 ?·cm.
    Type: Application
    Filed: February 13, 2014
    Publication date: August 14, 2014
    Applicant: KANEKA CORPORATION
    Inventors: Naomi Nagai, Masami Nishida, Nobuhito Miura, Toshio Matsumoto, Hirotaka Umezaki
  • Patent number: 8664647
    Abstract: Provided is a high-luminance, long-life laminated organic electroluminescent element. The organic electroluminescent element has a composition in which a plurality of light-emitting units, including at least one organic light-emitting layer, are laminated between a positive electrode and a negative electrode, and in which a linking layer is held between the respective light-emitting units. The linking layer is formed by laminating, in succession from the positive electrode side, an electron generating/transport section, an intermediate layer, and a hole generating/transport section, which contain at least one metal selected from a group consisting of an alkali metal, alkaline earth metal, rare earth metal, alloy of these metals, and compound of these metals. Preferably the intermediate layer contains an electrical insulating non-semiconductive substance having a specific resistance which is between 1.0×102 ?·cm and 1.0×109 ?·cm.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: March 4, 2014
    Assignee: Kaneka Corporation
    Inventors: Naomi Nagai, Masami Nishida, Nobuhito Miura, Toshio Matsumoto, Hirotaka Umezaki
  • Publication number: 20120119194
    Abstract: Provided is a high-luminance, long-life laminated organic electroluminescent element. The organic electroluminescent element has a composition in which a plurality of light-emitting units, including at least one organic light-emitting layer, are laminated between a positive electrode and a negative electrode, and in which a linking layer is held between the respective light-emitting units. The linking layer is formed by laminating, in succession from the positive electrode side, an electron generating/transport section, an intermediate layer, and a hole generating/transport section, which contain at least one metal selected from a group consisting of an alkali metal, alkaline earth metal, rare earth metal, alloy of these metals, and compound of these metals. Preferably the intermediate layer contains an electrical insulating non-semiconductive substance having a specific resistance which is between 1.0×102 ?·cm and 1.0×109 ?·cm.
    Type: Application
    Filed: July 22, 2010
    Publication date: May 17, 2012
    Applicant: KANEKA CORPORATION
    Inventors: Naomi Nagai, Masami Nishida, Nobuhito Miura, Toshio Matsumoto, Hirotaka Umezaki
  • Publication number: 20060214565
    Abstract: A top-emitting type multi-photon OLED panel comprises: an insulating substrate; a cathode formed on the insulating substrate; a plurality of organic layers laminated on the cathode; and a transparent anode formed on the top layer of the plurality of organic layers, wherein a charge generation layer is sandwiched between each organic layer.
    Type: Application
    Filed: March 16, 2006
    Publication date: September 28, 2006
    Inventors: Yongchun Luo, Naomi Nagai, Nobuhito Miura, Naganori Tsutsui, Shigeki Naka, Hiroyuki Okada, Hiroyoshi Onnagawa
  • Publication number: 20060214567
    Abstract: The present invention provides a top emission-type organic EL element with low resistance, whose upper electrode transmits visible light. The organic EL element includes an electron-transport layer, a light-emitting layer, a hole-transport layer and an upper electrode functioning as an anode formed in that order on a lower electrode functioning as a cathode. The upper electrode, which transmits visible light, includes a transparent electrode layer, a metal electrode layer and a transparent electrode layer, layered in that order from the lower electrode side.
    Type: Application
    Filed: March 22, 2006
    Publication date: September 28, 2006
    Inventors: Yongchun Luo, Naomi Nagai, Nobuhito Miura, Naganori Tsutsui