Patents by Inventor Masahiro Kawamura

Masahiro Kawamura 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: 10297761
    Abstract: An organic electroluminescence device includes: an anode; a cathode; and a single- or multi-layer organic layer interposed between the anode and the cathode. The organic layer includes at least one emitting layer containing a dopant material represented by a formula below. In the formula, X1 to X5 each independently represent CR1 or a nitrogen atom, at least one of X1 to X5 is a nitrogen atom, L1 represents a divalent aromatic hydrocarbon group or a divalent heterocyclic group, A and B each independently represents a cyclic structure, at least one of the cyclic structure A and the cyclic structure B has a substituent, and R1 represents an aryl group, alkyl group or the like.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: May 21, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Masahiro Kawamura, Hitoshi Kuma, Toshinari Ogiwara, Satomi Tasaki, Yumiko Mizuki, Kazuki Nishimura, Tomoharu Hayama
  • Publication number: 20190148649
    Abstract: A compound having a structure wherein at least 8-position or 9-position of fluoranthene is replaced by a nitrogen atom, a material for organic electroluminescence devices including the compound, and an organic electroluminescence device and an electronic equipment each including the material are provided. The compound is represented by formula (1): wherein A represents CR0 or N; R0 to R8 each independently represent a hydrogen atom or a substituent; at least one selected from R0 to R8 represents a substituent other than hydrogen atom; and groups selected from R0 to R8 which are bonded to adjacent carbon atoms may be bonded to each other to form a saturated or unsaturated ring structure.
    Type: Application
    Filed: January 16, 2019
    Publication date: May 16, 2019
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Takashi KASHIWAMURA, Kiyoshi Ikeda, Hironori Kawakami, Masahiro Kawamura
  • Patent number: 10283717
    Abstract: An organic electroluminescent device including: an anode, a cathode, an emitting layer formed of an organic compound and interposed between the cathode and the anode, and two or more layers provided in a hole-injecting/hole-transporting region between the anode and the emitting layer; of the layers which are provided in the hole-injecting/hole-transporting region, a layer which is in contact with the emitting layer containing a compound represented by the formula (1); and of the layers which are provided in the hole-injecting/hole-transporting region, a layer which is interposed between the anode and the layer which is in contact with the emitting layer containing an amine derivative represented by the formula (2).
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: May 7, 2019
    Assignees: IDEMITSU KOSAN CO., LTD., JOLED INC.
    Inventors: Masahiro Kawamura, Emiko Kambe, Akifumi Nakamura, Yasunori Kijima, Tadahiko Yoshinaga, Shigeyuki Matsunami
  • Patent number: 10270040
    Abstract: A fused amine compound including a furan ring or a thiophene ring and an organic electroluminescence device employing the amine compound. The organic electroluminescence device includes a cathode, an anode, and one or more organic thin film layers which are disposed between the cathode and the anode. The organic thin film layers include a light emitting layer and at least one layer of the organic thin film layers includes at least one amine compound.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: April 23, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoichi Ikeda, Hirokatsu Ito, Masahiro Kawamura, Hiroyuki Saito, Takeshi Ikeda
  • Patent number: 10263192
    Abstract: An organic electroluminescent device including: an anode, a cathode, an emitting layer formed of an organic compound and interposed between the cathode and the anode, and two or more layers provided in a hole-injecting/hole-transporting region between the anode and the emitting layer; of the layers which are provided in the hole-injecting/hole-transporting region, a layer which is in contact with the emitting layer containing a compound represented by the formula (1); and of the layers which are provided in the hole-injecting/hole-transporting region, a layer which is interposed between the anode and the layer which is in contact with the emitting layer containing an amine derivative represented by the formula (2).
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: April 16, 2019
    Assignees: IDEMITSU KOSAN CO., LTD., JOLED Inc.
    Inventors: Masahiro Kawamura, Emiko Kambe, Akifumi Nakamura, Yasunori Kijima, Tadahiko Yoshinaga, Shigeyuki Matsunami
  • Patent number: 10263191
    Abstract: An aromatic amine derivative represented by the following formula (1) wherein at least one of Ar1 to Ar4 is a heterocyclic group represented by the following formula (2) wherein X1 is an oxygen atom or a sulfur atom.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: April 16, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yumiko Mizuki, Masakazu Funahashi, Masahiro Kawamura
  • Publication number: 20190109285
    Abstract: An organic electroluminescence device includes an anode, a cathode and an emitting layer, in which the emitting layer includes a first compound and a second compound and each of the first compound and the second compound is a compound emitting thermally activated delayed fluorescence.
    Type: Application
    Filed: December 5, 2018
    Publication date: April 11, 2019
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Masahiro Kawamura, Yumiko Mizuki, Toshinari Ogiwara, Hitoshi Kuma
  • Patent number: 10243148
    Abstract: A compound represented by formula (1): wherein R1 to R4, a to d, L0 to L2, and Ar are as defined in the description, is a material providing an organic electroluminescence device which can be operated at a low driving voltage and has a long lifetime.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: March 26, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki Kato, Masahiro Kawamura, Masakazu Funahashi
  • Publication number: 20190077754
    Abstract: A compound represented by formula (1) provides an organic electroluminescence device having a high efficiency and a long lifetime: wherein R1 to R5, R6 to R10, and R11 to R18 are as defined in the description.
    Type: Application
    Filed: October 5, 2016
    Publication date: March 14, 2019
    Applicant: IDEMITSU KOSAN CO., LTD
    Inventors: Tomoki KATO, Masahiro KAWAMURA, Masakazu FUNAHASHI
  • Patent number: 10217945
    Abstract: A compound having a structure wherein at least 8-position or 9-position of fluoranthene is replaced by a nitrogen atom, a material for organic electroluminescence devices including the compound, and an organic electroluminescence device and an electronic equipment each including the material are provided. The compound is represented by formula (1): wherein A represents CR0 or N; R0 to R8 each independently represent a hydrogen atom or a substituent; at least one selected from R0 to R8 represents a substituent other than hydrogen atom; and groups selected from R0 to R8 which are bonded to adjacent carbon atoms may be bonded to each other to form a saturated or unsaturated ring structure.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: February 26, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Takashi Kashiwamura, Kiyoshi Ikeda, Hironori Kawakami, Masahiro Kawamura
  • Patent number: 10217954
    Abstract: A compound of the invention is represented by a formula (1) below. In the formula (1), Cz is represented by a formula (1a) below and Az is represented by a formula (11) below.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: February 26, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoharu Hayama, Masahiro Kawamura, Yumiko Mizuki, Hirokatsu Ito, Tasuku Haketa
  • Patent number: 10211404
    Abstract: A high-performance organic electroluminescence device and an electronic equipment provided with the organic electroluminescence device are provided. Also, a compound for achieving the organic electroluminescence device and the electronic equipment is provided. Specifically, a compound having a specific structure having a triphenylene skeleton, an organic electroluminescence device using the compound and an electronic equipment provided with the organic electroluminescence device are provided.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: February 19, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Masahiro Kawamura, Yumiko Mizuki, Hirokatsu Ito, Tomoharu Hayama, Tasuku Haketa
  • Publication number: 20190051835
    Abstract: The compound represented by formula (1): wherein A, B, R1, and R2 are as defined in the description, provides organic electroluminescence (EL) devices having a high emission efficiency when operated at low voltage and a long lifetime and electronic devices including such organic EL devices.
    Type: Application
    Filed: February 13, 2017
    Publication date: February 14, 2019
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Ryota TAKAHASHI, Tomoki KATO, Hirokatsu ITO, Masahiro KAWAMURA, Masakazu FUNAHASHI, Hiroyuki SAITO, Yuichiro KAWAMURA, Yoshiaki TAKAHASHI, Tetsuya MASUDA, Hitoshi KUMA
  • Patent number: 10205099
    Abstract: A fused fluoranthene compound including a specific ring structure at a specific position of a fluoranthene skeleton is a novel material useful as a material for organic electroluminescence devices.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: February 12, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Masahiro Kawamura, Yumiko Mizuki, Hirokatsu Ito, Tomoharu Hayama, Tasuku Haketa
  • Publication number: 20190023648
    Abstract: A compound is represented by the following formula (1). In the formula (1), Ar is a substituted or unsubstituted aryl group including 6 to 30 ring carbon atoms, Ra are independently a substituted or unsubstituted alkyl group including 1 to 15 carbon atoms, or a substituted or unsubstituted cycloalkyl group including 3 to 15 carbon atoms, Rb1 to Rb4 are independently a halogen atom, a cyano group, a substituted or unsubstituted alkyl group including 1 to 15 carbon atoms, or the like, Rc1 to Rc10 are independently a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted alkyl group including 1 to 15 carbon atoms, or the like, * is a bonding position at which one of Rc1 to Rc10 is bonded to either nitrogen atom, x is an integer from 0 to 3, y is an integer from 0 to 4, and z are independently an integer from 0 to 5.
    Type: Application
    Filed: September 25, 2018
    Publication date: January 24, 2019
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Hirokatsu ITO, Masahiro KAWAMURA, Yumiko MIZUKI, Tasuku HAKETA, Tomoharu HAYAMA, Ryota TAKAHASHI
  • Patent number: 10186665
    Abstract: An organic electroluminescence device includes an anode, a cathode and an emitting layer, in which the emitting layer includes a first compound and a second compound and each of the first compound and the second compound is a compound emitting thermally activated delayed fluorescence.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: January 22, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Masahiro Kawamura, Yumiko Mizuki, Toshinari Ogiwara, Hitoshi Kuma
  • Publication number: 20190006598
    Abstract: A compound represented by the following formula (1):
    Type: Application
    Filed: December 22, 2016
    Publication date: January 3, 2019
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Takushi SHIOMI, Masahiro KAWAMURA
  • Publication number: 20190006591
    Abstract: A compound represented by formula (1): wherein R1 to R5, a to e, L1 to L3, Ar, and X are as defined in the description.
    Type: Application
    Filed: August 1, 2016
    Publication date: January 3, 2019
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Taro YAMAKI, Tomoki KATO, Masahiro KAWAMURA, Hirokatsu ITO
  • Patent number: 10170707
    Abstract: A compound represented by formula (1): wherein R1 to R6, R7 to R10, R11 to R14, R15 to R18, L1, L2, Ar1, and Ar2 are as defined in the description realizes an organic electroluminescence device with long lifetime.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: January 1, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tasuku Haketa, Masahiro Kawamura
  • Publication number: 20180370981
    Abstract: The present invention relates to compounds of the general formula (I) and to a process for their preparation, to an electronic device comprising at least one of these compounds, to an emitting layer, preferably present in an electronic device, comprising at least one compound of general formula (I) and to the use of a compound according to general formula (I) in an electronic device as a host material and/or charge transporting material.
    Type: Application
    Filed: December 21, 2016
    Publication date: December 27, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yuichi NISHIMAE, Yuki NAKANO, Hideaki NAGASHIMA, Masahiro KAWAMURA, Tasuku HAKETA, Annemarie WOLLEB