Patents by Inventor Yuhki Terao

Yuhki Terao 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: 10361378
    Abstract: Provided is a practically useful organic EL element having high efficiency and high driving stability while being capable of being driven at a low voltage. The organic EL element has a light-emitting layer and any other organic layer between an anode and a cathode opposite to each other. The light-emitting layer contains at least two host materials and at least one light-emitting dopant. At least one of the host materials is a host material selected from compounds each having one or two indolocarbazole skeletons, and at least one of the other host materials is a host material selected from carbazole compounds each substituted with a dibenzofuran or a dibenzothiophene.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: July 23, 2019
    Assignees: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD., PIONEER CORPORATION, TOHOKU PIONEER CORPORATION
    Inventors: Masashi Tada, Takahiro Kai, Katsuhide Noguchi, Yasuhiro Takahashi, Yuhki Terao, Taishi Tsuji, Yusuke Nakajima, Toshinao Yuki
  • Patent number: 10340460
    Abstract: Provided is a practically useful organic electroluminescent device (organic EL device) having high efficiency and high driving stability while being capable of being driven at a low voltage. The organic electroluminescent device includes a light-emitting layer between an anode and a cathode opposite to each other. The light-emitting layer contains two host materials and at least one light-emitting dopant. One of the two host materials is a host material selected from an indolocarbazole compound having one indolocarbazole ring and an indolocarbazole compound having two indolocarbazole rings, and the other thereof is a host material selected from carbazole compounds.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: July 2, 2019
    Assignees: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD., PIONEER CORPORATION, TOHOKU PIONEER CORPORATION
    Inventors: Takayuki Fukumatsu, Katsuhide Noguchi, Masashi Tada, Mitsuru Sakai, Tohru Asari, Kazuto Shiraishi, Takahiro Kai, Yasuhiro Takahashi, Yuhki Terao, Taishi Tsuji, Yusuke Nakajima, Toshinao Yuki
  • Publication number: 20180130969
    Abstract: A second electrode (130) is superimposed on a first electrode (110). An organic layer (120) is positioned between the first electrode (110) and the second electrode (130). Furthermore, the organic layer (120) includes a light emitting layer (123). Furthermore, the organic layer (120) includes an alkali-containing layer (which is an electron transporting layer (125) in an example in the present drawing, and is hereinafter described as the electron transporting layer (125)) between the light emitting layer (123) and the second electrode (130). The electron transporting layer (125) includes an alkali metal. In the electron transporting layer (125), a content of the alkali metal as an elemental substance is greater than the content of a compound of the alkali metal.
    Type: Application
    Filed: January 4, 2018
    Publication date: May 10, 2018
    Inventor: Yuhki TERAO
  • Patent number: 9876188
    Abstract: A second electrode (130) is superimposed on a first electrode (110). An organic layer (120) is positioned between the first electrode (110) and the second electrode (130). Furthermore, the organic layer (120) includes a light emitting layer (123). Furthermore, the organic layer (120) includes an alkali-containing layer (which is an electron transporting layer (125) in an example in the present drawing, and is hereinafter described as the electron transporting layer (125)) between the light emitting layer (123) and the second electrode (130). The electron transporting layer (125) includes an alkali metal. In the electron transporting layer (125), a content of the alkali metal as an elemental substance is greater than the content of a compound of the alkali metal.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: January 23, 2018
    Assignee: PIONEER CORPORATION
    Inventor: Yuhki Terao
  • Publication number: 20160322593
    Abstract: A second electrode (130) is superimposed on a first electrode (110). An organic layer (120) is positioned between the first electrode (110) and the second electrode (130). Furthermore, the organic layer (120) includes a light emitting layer (123). Furthermore, the organic layer (120) includes an alkali-containing layer (which is an electron transporting layer (125) in an example in the present drawing, and is hereinafter described as the electron transporting layer (125)) between the light emitting layer (123) and the second electrode (130). The electron transporting layer (125) includes an alkali metal. In the electron transporting layer (125), a content of the alkali metal as an elemental substance is greater than the content of a compound of the alkali metal.
    Type: Application
    Filed: December 27, 2013
    Publication date: November 3, 2016
    Applicant: PIONEER CORPORATION
    Inventor: Yuhki TERAO
  • Patent number: 9338855
    Abstract: A lighting apparatus includes: a plurality of light emission units that respectively emit lights in luminescent colors different from each other; and a control unit that controls in luminance the respective light, which are emitted from said plurality of light emission units, for the respective luminescent colors. In response to a control input, said control unit switches between a first light emission mode that it makes said light emission units emit light with luminance set for the respective luminescent colors and a second light emission mode that makes it light emission units corresponding to at least one luminescent color turn off or emit light with luminance lower than the luminance in the first light emission mode.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: May 10, 2016
    Assignee: PIONEER CORPORATION
    Inventors: Akira Hirasawa, Yuhki Terao
  • Publication number: 20150325796
    Abstract: Provided is a practically useful organic EL element having high efficiency and high driving stability while being capable of being driven at a low voltage. The organic EL element has a light-emitting layer and any other organic layer between an anode and a cathode opposite to each other. The light-emitting layer contains at least two host materials and at least one light-emitting dopant. At least one of the host materials is a host material selected from compounds each having one or two indolocarbazole skeletons, and at least one of the other host materials is a host material selected from carbazole compounds each substituted with a dibenzofuran or a dibenzothiophene.
    Type: Application
    Filed: November 21, 2013
    Publication date: November 12, 2015
    Inventors: Masashi TADA, Takahiro KAI, Katsuhide NOGUCHI, Yasuhiro TAKAHASHI, Yuhki TERAO, Taishi TSUJI, Yusuke NAKAJIMA, Toshinao YUKI
  • Publication number: 20150115240
    Abstract: Provided is a practically useful organic electroluminescent device (organic EL device) having high efficiency and high driving stability while being capable of being driven at a low voltage. The organic electroluminescent device includes a light-emitting layer between an anode and a cathode opposite to each other. The light-emitting layer contains two host materials and at least one light-emitting dopant. One of the two host materials is a host material selected from an indolocarbazole compound having one indolocarbazole ring and an indolocarbazole compound having two indolocarbazole rings, and the other thereof is a host material selected from carbazole compounds.
    Type: Application
    Filed: March 25, 2013
    Publication date: April 30, 2015
    Inventors: Takayuki Fukumatsu, Katsuhide Noguchi, Masashi Tada, Mitsuru Sakai, Tohru Asari, Kazuto Shiraishi, Takahiro Kai, Yasuhiro Takahashi, Yuhki Terao, Taishi Tsuji, Yusuke Nakajima, Toshinao Yuki
  • Publication number: 20150029711
    Abstract: A straight tube light-emitting lamp includes: a pipe-shaped transparent tube; an organic EL tubular illuminant disposed inside the pipe-shaped transparent tube so as to surround a center axis of the pipe-shaped transparent tube; a battery box disposed at an inner side than the tubular illuminant for housing a battery; and a wiring circuit for supplying an output voltage of the battery housed in the battery box to the tubular illuminant.
    Type: Application
    Filed: February 17, 2012
    Publication date: January 29, 2015
    Applicant: Pioneer Corporation
    Inventor: Yuhki Terao
  • Publication number: 20140292223
    Abstract: A lighting apparatus includes: a plurality of light emission units that respectively emit lights in luminescent colors different from each other; and a control unit that controls in luminance the respective light, which are emitted from said plurality of light emission units, for the respective luminescent colors. In response to a control input, said control unit switches between a first light emission mode that it makes said light emission units emit light with luminance set for the respective luminescent colors and a second light emission mode that makes it light emission units corresponding to at least one luminescent color turn off or emit light with luminance lower than the luminance in the first light emission mode.
    Type: Application
    Filed: August 31, 2011
    Publication date: October 2, 2014
    Applicant: PIONEER CORPORATION
    Inventors: Akira Hirasawa, Yuhki Terao