Patents by Inventor Itaru Takaya

Itaru Takaya 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: 10937979
    Abstract: An organic EL element includes a first electrode, a first luminescent layer, a second luminescent layer, a third luminescent layer, and a second electrode, in this order. The second luminescent layer is in contact with the first luminescent layer and the third luminescent layer. The first luminescent layer contains a red dopant and a first host material. The second luminescent layer contains a blue dopant and a second host material, and the third luminescent layer contains a green dopant and the second host material. The second host material is different from the first host material.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: March 2, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Yamada, Itaru Takaya, Jun Kamatani, Hirokazu Miyashita
  • Publication number: 20210057665
    Abstract: An organic EL element characterized by including a first electrode, a second electrode, and a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer that are disposed between the first electrode and the second electrode, the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer each containing a host material and a light-emitting material, in which the first light-emitting layer is a light-emitting layer that emits red light and green light, the second light-emitting layer is a light-emitting layer that emits blue light, and the third light-emitting layer is a light-emitting layer that emits green light.
    Type: Application
    Filed: October 22, 2020
    Publication date: February 25, 2021
    Inventors: Itaru Takaya, Naoki Yamada, Takayuki Ito, Hirokazu Miyashita
  • Publication number: 20200403173
    Abstract: An organic light emitting element includes, in sequence, an anode, a first light emitting layer, a second light emitting layer, and a cathode. The first light emitting layer includes a first compound and a first light emitting material. The second light emitting layer includes a second compound and a second light emitting material having an energy gap different from an energy gap of the first light emitting material. The organic light emitting element satisfies relations (a) to (c). LUMO(H1)>LUMO(D1)??(a) LUMO(H2)>LUMO(D2)??(b) LUMO(H2)?LUMO(D2)>LUMO(H1)?LUMO(D1)??(c) Where LUMO (H1), LUMO (D1), LUMO (H2), and LUMO (D2) represent a LUMO level of the first compound, a LUMO level of the first light emitting material, a LUMO level of the second compound, and a LUMO level of the second light emitting material, respectively.
    Type: Application
    Filed: June 12, 2020
    Publication date: December 24, 2020
    Inventors: Hirokazu Miyashita, Itaru Takaya, Naoki Yamada, Isao Kawata, Yuto Ito, Jun Kamatani
  • Publication number: 20200358020
    Abstract: An organic light emitting device including, in sequence, a first electrode, a first charge transport layer, a second charge transport layer in contact with the first charge transport layer, a light emitting layer in contact with the second charge transport layer, and a second electrode, wherein the first charge transport layer includes a first material and a second material, the second charge transport layer includes the second material and a third material, and the light emitting layer includes the third material and a fourth material.
    Type: Application
    Filed: April 28, 2020
    Publication date: November 12, 2020
    Inventors: Naoki Yamada, Satoru Shiobara, Itaru Takaya, Jun Kamatani
  • Patent number: 10790465
    Abstract: A white organic electroluminescent (EL) element includes, in sequence, an anode, a first light-emitting layer that is a blue-light-emitting layer, a hole-blocking layer, an electron transport layer, and a cathode. The hole-blocking layer is adjacent to the first light-emitting layer and the electron transport layer and formed of a hydrocarbon. The electron transport layer is formed of a nitrogen-containing heterocyclic compound. The first light-emitting layer contains a first host and a first dopant that emits blue fluorescent light. Relations (a), (b), and (c) are satisfied. LUMO(H1)>LUMO(D1)??(a) 0.1<d(ETL)/d(HBL)<0.7??(b) 90 nm?d(E)=d(HBL)+d(ETL)<150 nm??(c) LUMO (H1): lowest unoccupied molecular orbital (LUMO) energy of first host LUMO (D1): LUMO energy of first dopant d (HBL): thickness of hole-blocking layer d (ETL): thickness of electron transport layer.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: September 29, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tomokazu Kotake, Hirokazu Miyashita, Itaru Takaya, Takayuki Ito, Koji Ishizuya, Norifumi Kajimoto
  • Publication number: 20200161558
    Abstract: A white organic electroluminescent (EL) element including an anode, a cathode, and a light-emitting layer disposed between the anode and the cathode. The light-emitting layer includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer and the second light-emitting layer each contain a host material and a light-emitting dopant material. The first light-emitting layer contains, as the light-emitting dopant material, a green-light-emitting dopant material and a blue-light-emitting dopant material and is a dual-color light-emitting layer that emits green light and blue light. The second light-emitting layer contains, as the light-emitting dopant material, a red-light-emitting dopant material and a green-light-emitting dopant material and is a dual-color light-emitting layer that emits red light and green light.
    Type: Application
    Filed: November 14, 2019
    Publication date: May 21, 2020
    Inventors: Itaru Takaya, Naoki Yamada
  • Publication number: 20200044175
    Abstract: A white organic electroluminescent (EL) element includes, in sequence, an anode, a first light-emitting layer that is a blue-light-emitting layer, a hole-blocking layer, an electron transport layer, and a cathode. The hole-blocking layer is adjacent to the first light-emitting layer and the electron transport layer and formed of a hydrocarbon. The electron transport layer is formed of a nitrogen-containing heterocyclic compound. The first light-emitting layer contains a first host and a first dopant that emits blue fluorescent light. Relations (a), (b), and (c) are satisfied. LUMO(H1)>LUMO(D1)??(a) 0.1<d(ETL)/d(HBL)<0.
    Type: Application
    Filed: July 26, 2019
    Publication date: February 6, 2020
    Inventors: Tomokazu Kotake, Hirokazu Miyashita, Itaru Takaya, Takayuki Ito, Koji Ishizuya, Norifumi Kajimoto
  • Publication number: 20190333968
    Abstract: An organic EL element includes a first electrode, a first luminescent layer, a second luminescent layer, a third luminescent layer, and a second electrode, in this order. The second luminescent layer is in contact with the first luminescent layer and the third luminescent layer. The first luminescent layer contains a red dopant and a first host material. The second luminescent layer contains a blue dopant and a second host material, and the third luminescent layer contains a green dopant and the second host material. The second host material is different from the first host material.
    Type: Application
    Filed: April 24, 2019
    Publication date: October 31, 2019
    Inventors: Naoki Yamada, Itaru Takaya, Jun Kamatani, Hirokazu Miyashita
  • Patent number: 10396305
    Abstract: An organic EL device includes a substrate, a reflection electrode, an organic compound layer and a light extraction electrode in this order. The organic compound layer includes a first light-emitting layer which is electron trapping type light-emitting layer and a second light-emitting layer disposed between the reflection electrode and the first light-emitting layer. An optical distance between the reflection electrode and the first light-emitting layer is a distance of constructive interference for the light of the first light-emitting layer.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: August 27, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Itaru Takaya
  • Publication number: 20190123279
    Abstract: A light-emitting device includes a plurality of organic EL elements. Each of the organic EL elements includes a reflection electrode, a hole transport region, an electron-trapping luminescent layer, and a light extraction electrode in this order. The hole transport region has a sheet resistance of 4.0×107 ?/sq. or more at a current of 0.1 nA/pixel, and the total thickness of the hole transport region and the electron-trapping luminescent layer is equivalent to an optical path length enabling emission from the electron-trapping luminescent layer to be enhanced.
    Type: Application
    Filed: October 16, 2018
    Publication date: April 25, 2019
    Inventors: Norifumi Kajimoto, Tetsuo Takahashi, Koji Ishizuya, Itaru Takaya, Hirokazu Miyashita, Takayuki Ito, Hiroaki Sano
  • Patent number: 9991451
    Abstract: An organic light-emitting device is provided that is driven with a low voltage and has a high luminous efficiency and a long device lifetime. The organic light-emitting device includes an anode, a cathode, a light-emitting layer disposed between the anode and the cathode, and an organic compound layer disposed between the cathode and the light-emitting layer and being in contact with the cathode.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: June 5, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Naoki Yamada, Jun Kamatani, Takayuki Ito, Itaru Takaya, Minako Nakasu
  • Publication number: 20180151823
    Abstract: An organic EL device includes a substrate, a reflection electrode, an organic compound layer and a light extraction electrode in this order. The organic compound layer includes a first light-emitting layer which is electron trapping type light-emitting layer and a second light-emitting layer disposed between the reflection electrode and the first light-emitting layer. An optical distance between the reflection electrode and the first light-emitting layer is a distance of constructive interference for the light of the first light-emitting layer.
    Type: Application
    Filed: November 22, 2017
    Publication date: May 31, 2018
    Inventor: Itaru Takaya
  • Publication number: 20150303385
    Abstract: An organic light-emitting device is provided that is driven with a low voltage and has a high luminous efficiency and a long device lifetime. The organic light-emitting device includes an anode, a cathode, a light-emitting layer disposed between the anode and the cathode, and an organic compound layer disposed between the cathode and the light-emitting layer and being in contact with the cathode.
    Type: Application
    Filed: April 13, 2015
    Publication date: October 22, 2015
    Inventors: Naoki Yamada, Jun Kamatani, Takayuki Ito, Itaru Takaya, Minako Nakasu
  • Patent number: 9155160
    Abstract: Provided is a method of manufacturing an organic electroluminescence display device including an organic electroluminescence element, which has element characteristics comparable to those in the case of a vacuum in-situ process, while utilizing a patterning approach based on photolithography. The method of manufacturing an organic electroluminescence display device includes: an organic compound layer-forming step of forming an organic compound layer at least on a first electrode; a release layer-forming step of forming a release layer on the organic compound layer; a release layer-processing step of processing the release layer; and an organic compound layer-processing step of removing the organic compound layer in a region not covered with the release layer processed in the release layer-processing step, and at least the lowermost layer out of the release layer is a deposited film formed of a material soluble in a polar solvent.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: October 6, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taro Endo, Nobuhiko Sato, Itaru Takaya, Tomoyuki Hiroki, Koichi Ishige, Satoru Shiobara, Jun Kamatani, Yosuke Nishide
  • Publication number: 20150280175
    Abstract: This invention provides a method for manufacturing an organic light emitting element in which damages to members constituting the organic light emitting element are suppressed and a protective layer with few defects is formed by performing cleaning with liquid containing water. The manufacturing method according to this invention is a method for manufacturing an organic light emitting element including a process of preparing a lower electrode, a process of forming an organic compound layer on the lower electrode, a process of forming an upper electrode on the organic compound layer; and a process of forming a first protective layer on the upper electrode, in which the method includes, after the process of forming the organic compound layer, a process of cleaning at least one of the organic compound layer, the upper electrode, and the first protective layer with liquid containing water.
    Type: Application
    Filed: March 25, 2015
    Publication date: October 1, 2015
    Inventors: Takayuki Ito, Itaru Takaya, Seiji Mashimo, Koji Ishizuya, Jun Kamatani, Naoki Yamada, Tetsuya Kosuge, Hirokazu Miyashita
  • Patent number: 8927974
    Abstract: A first light-emitting layer of a first organic electroluminescent element is disposed in common to a second organic electroluminescent element, a second light-emitting layer of the second organic electroluminescent element is disposed in contact with the first light-emitting layer and in the cathode side, and the first light-emitting layer is a light-emitting layer having an electron trapping property.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: January 6, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Itaru Takaya
  • Patent number: 8877532
    Abstract: A method of manufacturing an organic electroluminescence display device includes an organic compound layer which is placed between a pair of electrodes and includes at least an emission layer, the organic compound layer being two-dimensionally arranged, includes forming the organic compound layer which is insoluble in water in an entire emission region on a substrate, providing a mask layer containing a water-soluble material in at least a part of a region on the organic compound layer, removing a part of the organic compound layer which is provided in a region which is other than the region in which the mask layer is provided, removing the mask layer, and forming, after the removing of the mask layer, a layer containing at least an alkali metal or an alkaline-earth metal in a region including at least the emission region.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: November 4, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoyuki Hiroki, Taro Endo, Itaru Takaya, Koichi Ishige, Nobuhiko Sato
  • Patent number: 8530254
    Abstract: A method of manufacturing an organic electroluminescence device includes forming a first organic electroluminescence layer at least on a first lower electrode, forming a first protective layer on the first organic electroluminescence layer, processing the first organic electroluminescence layer and the first protective layer, forming a second organic electroluminescence layer at least on a second lower electrode, forming a second protective layer on the second organic electroluminescence layer, and processing the second organic electroluminescence layer and the second protective layer.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: September 10, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshihide Kimura, Tomoyuki Hiroki, Taro Endo, Itaru Takaya, Koichi Ishige, Nobuhiko Sato
  • Publication number: 20130048968
    Abstract: A first light-emitting layer of a first organic electroluminescent element is disposed in common to a second organic electroluminescent element, a second light-emitting layer of the second organic electroluminescent element is disposed in contact with the first light-emitting layer and in the cathode side, and the first light-emitting layer is a light-emitting layer having an electron trapping property.
    Type: Application
    Filed: August 27, 2012
    Publication date: February 28, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Itaru Takaya
  • Publication number: 20120274239
    Abstract: Provided is a method of manufacturing an organic electroluminescence display device including an organic electroluminescence element, which has element characteristics comparable to those in the case of a vacuum in-situ process, while utilizing a patterning approach based on photolithography. The method of manufacturing an organic electroluminescence display device includes: an organic compound layer-forming step of forming an organic compound layer at least on a first electrode; a release layer-forming step of forming a release layer on the organic compound layer; a release layer-processing step of processing the release layer; and an organic compound layer-processing step of removing the organic compound layer in a region not covered with the release layer processed in the release layer-processing step, and at least the lowermost layer out of the release layer is a deposited film formed of a material soluble in a polar solvent.
    Type: Application
    Filed: April 11, 2012
    Publication date: November 1, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Taro Endo, Nobuhiko Sato, Itaru Takaya, Tomoyuki Hiroki, Koichi Ishige, Satoru Shiobara, Jun Kamatani, Yosuke Nishide