Patents by Inventor Ichiro Imada

Ichiro Imada 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: 11038111
    Abstract: An organic electroluminescence device includes a first electrode and a second electrode which are positioned facing each other, and at least one organic layer between the first electrode and the second electrode, wherein the at least one organic layer includes a monoamine compound which is represented by Formula 1 and includes at least one adamantyl group as a substituent, thereby achieving improved device efficiency:
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: June 15, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ichinori Takada, Ichiro Imada
  • Publication number: 20210135110
    Abstract: Provided are a monoamine compound and an organic electroluminescence device including the same.
    Type: Application
    Filed: January 7, 2021
    Publication date: May 6, 2021
    Inventors: Ichinori TAKADA, Akinori YAMATANI, Ichiro IMADA, Hiroaki ITOI
  • Patent number: 10923663
    Abstract: Provided are a monoamine compound and an organic electroluminescence device including the same.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: February 16, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ichinori Takada, Akinori Yamatani, Ichiro Imada, Hiroaki Itoi
  • Patent number: 10910578
    Abstract: A polycyclic compound and an organic electroluminescence, the polycyclic compound being represented by the following Formula 1:
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: February 2, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ichinori Takada, Masatsugu Ueno, Ichiro Imada
  • Publication number: 20200127208
    Abstract: Provided are an organic electroluminescence device including an amine compound represented by Formula 1 in at least one of a plurality of organic layers and an amine compound represented by Formula 1.
    Type: Application
    Filed: October 16, 2019
    Publication date: April 23, 2020
    Inventors: Ichiro IMADA, Ichinori TAKADA
  • Publication number: 20190165273
    Abstract: An organic electroluminescence device includes a first electrode and a second electrode which are positioned facing each other, and at least one organic layer between the first electrode and the second electrode, wherein the at least one organic layer includes a monoamine compound which is represented by Formula 1 and includes at least one adamantyl group as a substituent, thereby achieving improved device efficiency:
    Type: Application
    Filed: November 26, 2018
    Publication date: May 30, 2019
    Inventors: Ichinori TAKADA, Ichiro IMADA
  • Publication number: 20190097157
    Abstract: A polycyclic compound and an organic electroluminescence, the polycyclic compound being represented by the following Formula 1:
    Type: Application
    Filed: July 11, 2018
    Publication date: March 28, 2019
    Inventors: Ichinori TAKADA, Masatsugu UENO, Ichiro IMADA
  • Patent number: 10079348
    Abstract: A material for an organic electroluminescent device having high emission efficiency is represented by following Formula 1: The material represented by Formula 1 may be included in at least one layer selected from a plurality of layers between an anode and an emission layer of an organic EL device.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: September 18, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Xiulan Jin, Hiroaki Itoi, Junta Fuchiwaki, Asami Sakamoto, Hideo Miyake, Ichiro Imada
  • Publication number: 20180123054
    Abstract: The invention relates to a composition for organic electroluminescent element, which comprises: a solvent; and a compound group ? for organic electroluminescent element that is constituted of at least two kinds of compounds which each have a molecular weight of 3,000 or less and have a structure comprising a plurality of aromatic ring groups linked to each other, wherein the compound group ? comprises: a compound ?1; and another compound an satisfying a specific condition.
    Type: Application
    Filed: December 28, 2017
    Publication date: May 3, 2018
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Hideki GOROHMARU, Tomomi OKAMOTO, Wataru SHIMIZU, Kazuhiro NAGAYAMA, Takashi OYA, Koichi ISHIBASHI, Ichiro IMADA
  • Publication number: 20180114907
    Abstract: Provided are a monoamine compound and an organic electroluminescence device including the same.
    Type: Application
    Filed: October 20, 2017
    Publication date: April 26, 2018
    Inventors: Ichinori TAKADA, Akinori YAMATANI, Ichiro IMADA, Hiroaki ITOI
  • Patent number: 9899606
    Abstract: The invention relates to a composition for organic electroluminescent element, which comprises: a solvent; and a compound group ? for organic electroluminescent element that is constituted of at least two kinds of compounds which each have a molecular weight of 3,000 or less and have a structure comprising a plurality of aromatic ring groups linked to each other, wherein the compound group ? comprises: a compound ?1; and another compound ?n satisfying a specific condition.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: February 20, 2018
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Hideki Gorohmaru, Tomomi Okamoto, Wataru Shimizu, Kazuhiro Nagayama, Takashi Oya, Koichi Ishibashi, Ichiro Imada
  • Publication number: 20170012204
    Abstract: A material for an organic electroluminescent device having high emission efficiency is represented by following Formula 1: The material represented by Formula 1 may be included in at least one layer selected from a plurality of layers between an anode and an emission layer of an organic EL device.
    Type: Application
    Filed: March 17, 2016
    Publication date: January 12, 2017
    Inventors: Xiulan Jin, Hiroaki Itoi, Junta Fuchiwaki, Asami Sakamoto, Hideo Miyake, Ichiro Imada
  • Patent number: 9525009
    Abstract: The objection of invention is to provide an organic electroluminescent element having an excellent current-voltage property. The organic electroluminescent element of the invention comprises an anode, a light emitting layer and a cathode, in this order, wherein a total number of kinds of an electron transport material and a light emitting material contained in the light emitting layer is five or more. Preferably, a total number of kinds of an electron transport material contained in the light emitting layer is four or more, and at least one of an ionization potential and an electron affinity of three kinds or more of the electron transport materials contained in the light emitting layer is different from each other.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: December 20, 2016
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Futoshi Tanaka, Ichiro Imada, Hideki Gorohmaru
  • Patent number: 9379361
    Abstract: An organic electroluminescent element comprising: an anode; a cathode; a luminescent layer provided between the anode and the cathode; and a hole injecting and transporting layer provided between the anode and the cathode and adjacent to the luminescent layer, wherein at least the luminescent layer is formed by a wet film forming method, and contains a charge transporting material and a luminescent material, in which the charge transporting material contains a hole transporting material and an electron transporting material each having a specific partial structure, and the luminescent material contains at least three kinds of materials and has an emission spectrum having at least two kinds of emission maximums.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: June 28, 2016
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yasuyuki Tsurutani, Hideki Gorohmaru, Ichiro Imada
  • Publication number: 20160072091
    Abstract: An organic electroluminescent device includes an anode, an emission layer, an anode-side hole transport layer on the anode and the emission layer, the anode-side hole transport layer including an anode-side hole transport material and the anode-side hole transport layer being doped with an electron accepting material, an intermediate hole transport material layer between the anode-side hole transport layer and the emission layer, the intermediate hole transport layer including an intermediate hole transport material, and an emission layer-side hole transport material between the intermediate hole transport material layer and the emission layer and adjacent to the emission layer, the emission layer-side hole transport material layer including an emission layer-side hole transport material represented by the following General Formula (1): where Ar1, Ar2, Ar3, Ar4, L1, and L2 are as defined in the specification.
    Type: Application
    Filed: July 14, 2015
    Publication date: March 10, 2016
    Inventors: Ichiro IMADA, Naoya SAKAMOTO
  • Patent number: 9065057
    Abstract: An aryl amine derivative and an organic electroluminescent device using the aryl amine derivative as a hole transport material, the aryl amine derivative being represented by the following Chemical Formula 1.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: June 23, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Ichiro Imada
  • Patent number: 9028980
    Abstract: The present invention relates to an organic electroluminescent element which comprises two or more hole injection/transport layers each formed by a wet film formation method using a composition containing, as a hole-injecting/transporting compound, an arylamine polymer compound that has a repeating unit having a triarylamine structure therein, in which when the number of atoms present on the path which is the smallest in the number of atoms present thereon, of the paths which each connect the nonaromatic tertiary nitrogen atoms contained in any two triarylamine structures present in each polymer compound, is taken as N: the minimum number of atoms between nitrogen atoms in the compound, then the N in each hole injection/transport layer is in a specific state.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: May 12, 2015
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tomohiro Abe, Futoshi Tanaka, Kazuki Okabe, Atsushi Takahashi, Koichiro Iida, Ichiro Imada
  • Publication number: 20150076483
    Abstract: An organic electroluminescent element comprising: an anode; a cathode; a luminescent layer provided between the anode and the cathode; and a hole injecting and transporting layer provided between the anode and the cathode and adjacent to the luminescent layer, wherein at least the luminescent layer is formed by a wet film forming method, and contains a charge transporting material and a luminescent material, in which the charge transporting material contains a hole transporting material and an electron transporting material each having a specific partial structure, and the luminescent material contains at least three kinds of materials and has an emission spectrum having at least two kinds of emission maximums.
    Type: Application
    Filed: November 24, 2014
    Publication date: March 19, 2015
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yasuyuki TSURUTANI, Hideki GOROHMARU, Ichiro IMADA
  • Publication number: 20140350247
    Abstract: An aryl amine derivative and an organic electroluminescent device using the aryl amine derivative as a hole transport material, the aryl amine derivative being represented by the following Chemical Formula 1.
    Type: Application
    Filed: May 22, 2014
    Publication date: November 27, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventor: Ichiro IMADA
  • Publication number: 20140326975
    Abstract: The organic electroluminescent element of the invention comprises a cathode, an anode, and a light emitting layer between the cathode and the anode, wherein the light emitting layer comprises, in the order from the side of the anode: a layer containing an charge transport material and a phosphorescent-light emitting material of a low-molecular compound, in which the layer is formed by a wet film forming method; and a layer containing an charge transport material and a fluorescent-light emitting material of a low-molecular compound, in which the layer is formed by a vacuum deposition method, wherein the organic electroluminescent element has a specific emission spectrum.
    Type: Application
    Filed: July 17, 2014
    Publication date: November 6, 2014
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yasuyuki TSURUTANI, Ichiro IMADA