Patents by Inventor Takahisa Shimizu

Takahisa Shimizu 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: 11963433
    Abstract: The present invention provides an organic electroluminescence device capable of having not only a device lifetime comparable to that of an existing organic electroluminescence device but also a small thickness of smaller than 10 ?m and excellent flexibility. The present invention relates to an organic electroluminescence device having a structure including: an anode; a cathode on a substrate; and a laminate of multiple layers between the anode and the cathode, the device having a thickness of smaller than 10 ?m.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: April 16, 2024
    Assignees: The University of Tokyo, Nippon Hoso Kyokai, Nippon Shokubai Co., Ltd.
    Inventors: Takao Someya, Tomoyuki Yokota, Hirohiko Fukagawa, Takahisa Shimizu, Katsuyuki Morii, Tsuyoshi Goya, Kenji Kuwada
  • Publication number: 20230006159
    Abstract: The present invention provides an organic thin film that imparts an excellent electron injection property and an excellent electron transport property when it is used as an electron injection layer of an organic EL device, a coating composition suitable for producing the organic thin film, and an organic EL device material for the organic thin film and the coating composition.
    Type: Application
    Filed: September 4, 2020
    Publication date: January 5, 2023
    Inventors: Hirohiko FUKAGAWA, Takahisa SHIMIZU, Tsubasa SASAKI, Munehiro HASEGAWA, Katsuyuki MORII, Hiroki FUKUDOME
  • Publication number: 20220310937
    Abstract: The present invention aims to provide an organic thin film that imparts an excellent electron injection property and an excellent electron transport property when it is used as an electron injection layer of an organic EL device. The present invention relates to an organic thin film, which is a single film containing a first material which is a hexahydropyrimidopyrimidine compound having a structure of the following formula (1) and a second material which transports electrons, or a laminate film including a film containing the first material and a film containing the second material, wherein R1 is an optionally substituted aromatic hydrocarbon group, an optionally substituted aromatic heterocyclic group, an optionally substituted arylalkylene group, an optionally substituted divalent to tetravalent acyclic or cyclic hydrocarbon group, a group of a combination of two or more of these groups, or a group of a combination of one or more of these groups and a nitrogen atom; and n is an integer of 1 to 4.
    Type: Application
    Filed: September 4, 2020
    Publication date: September 29, 2022
    Inventors: Hirohiko FUKAGAWA, Takahisa SHIMIZU, Tsubasa SASAKI, Taku OONO, Munehiro HASEGAWA, Katsuyuki MORII, Hiroki FUKUDOME
  • Publication number: 20220069220
    Abstract: The present invention provides an organic electroluminescence device capable of having not only a device lifetime comparable to that of an existing organic electroluminescence device but also a small thickness of smaller than 10 ?m and excellent flexibility. The present invention relates to an organic electroluminescence device having a structure including: an anode; a cathode on a substrate; and a laminate of multiple layers between the anode and the cathode, the device having a thickness of smaller than 10 ?m.
    Type: Application
    Filed: December 6, 2019
    Publication date: March 3, 2022
    Inventors: Takao SOMEYA, Tomoyuki YOKOTA, Hirohiko FUKAGAWA, Takahisa SHIMIZU, Katsuyuki MORII, Tsuyoshi GOYA, Kenji KUWADA
  • Patent number: 11183645
    Abstract: An organic thin film that imparts an excellent electron injection property when it is used as an electron injection layer of an organic EL device and a method for producing the organic thin film are provided. An organic thin film at least includes: a first material which is an organic material having an acid dissociation constant pKa of 1 or greater; and a second material which transports an electron. The first material is at least one selected from the group consisting of tertiary amines, phosphazene compounds, guanidine compounds, heterocyclic compounds containing an amidine structure, hydrocarbon compounds having a ring structure, and ketone compounds.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: November 23, 2021
    Assignees: Nippon Hoso Kyokai, Nippon Shokubai Co., Ltd.
    Inventors: Hirohiko Fukagawa, Takahisa Shimizu, Katsuyuki Morii, Munehiro Hasegawa, Syun Gohda
  • Patent number: 11183639
    Abstract: The present invention provides an organic electroluminescence device having excellent luminous efficiency and excellent luminance. The present invention relates to an organic electroluminescence device including a structure in which a plurality of layers is laminated between an anode and a cathode formed on a substrate; wherein the organic electroluminescence device includes a metal oxide layer between the anode and the cathode; and a nitrogen-containing film layer having an average thickness of not less than 0.1 nm but less than 3 nm adjacent to the metal oxide layer and disposed on an anode side.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: November 23, 2021
    Assignees: Nippon Shokubai Co., Ltd., Nippon Hoso Kyokai
    Inventors: Katsuyuki Morii, Kaho Maeda, Akiko Kuriyama, Hirohiko Fukagawa, Takahisa Shimizu
  • Publication number: 20200220080
    Abstract: The present invention provides an organic electroluminescence device having excellent luminous efficiency and excellent luminance. The present invention relates to an organic electroluminescence device including a structure in which a plurality of layers is laminated between an anode and a cathode formed on a substrate; wherein the organic electroluminescence device includes a metal oxide layer between the anode and the cathode; and a nitrogen-containing film layer having an average thickness of not less than 0.1 nm but less than 3 nm adjacent to the metal oxide layer and disposed on an anode side.
    Type: Application
    Filed: September 18, 2018
    Publication date: July 9, 2020
    Inventors: Katsuyuki MORII, Kaho MAEDA, Akiko KURIYAMA, Hirohiko FUKAGAWA, Takahisa SHIMIZU
  • Publication number: 20190081239
    Abstract: The present invention aims to provide an organic thin film that imparts an excellent electron injection property when it is used as an electron injection layer of an organic EL device, and a method for producing the organic thin film. The present invention relates to an organic thin film at least including: a first material which is an organic material having an acid dissociation constant pKa of 1 or greater; and a second material which transports an electron, the first material being one or two or more selected from the group consisting of tertiary amines, phosphazene compounds, guanidine compounds, heterocyclic compounds containing an amidine structure, hydrocarbon compounds having a ring structure, and ketone compounds.
    Type: Application
    Filed: March 17, 2016
    Publication date: March 14, 2019
    Inventors: Hirohiko FUKAGAWA, Takahisa SHIMIZU, Katsuyuki MORII, Munehiro HASEGAWA, Syun GOHDA
  • Patent number: 9699385
    Abstract: An imaging apparatus includes an imaging module configured to capture an image, and a controller. The controller obtains a luminance of a minimum luminance area or a maximum luminance area in an imaging target area of an image captured by the imaging module and controls an exposure amount in the imaging module on the basis of the luminance.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: July 4, 2017
    Assignee: KYOCERA Corporation
    Inventor: Takahisa Shimizu
  • Publication number: 20160005994
    Abstract: The present invention aims to provide an organic electroluminescence device that operates successfully without strict sealing. Provided is an organic electroluminescence device having a structure in which a plurality of layers is stacked between an anode and a cathode formed on a substrate, wherein the organic electroluminescence device is sealed to provide a water vapor transmission rate of 10?6 to 10?3 g/m2·day.
    Type: Application
    Filed: February 28, 2014
    Publication date: January 7, 2016
    Applicants: NIPPON HOSO KYOKAI, NIPPON SHOKUBAI CO., LTD.
    Inventors: Hirohiko FUKAGAWA, Takahisa SHIMIZU, Katsuyuki MORII
  • Publication number: 20150358524
    Abstract: An imaging apparatus includes an imaging module configured to capture an image, and a controller. The controller obtains a luminance of a minimum luminance area or a maximum luminance area in an imaging target area of an image captured by the imaging module and controls an exposure amount in the imaging module on the basis of the luminance.
    Type: Application
    Filed: August 20, 2015
    Publication date: December 10, 2015
    Inventor: Takahisa SHIMIZU
  • Publication number: 20150104702
    Abstract: An electricity storage device including a positive electrode, a negative electrode, and an electrolytic solution located between the positive electrode and the negative electrode. At least one of the positive electrode 31 and the negative electrode contains an electricity storage material containing a polymerization product having a tetrachalcogenofulvalene structure in a repeat unit of a main chain.
    Type: Application
    Filed: December 16, 2014
    Publication date: April 16, 2015
    Inventors: Nobuhiko HOJO, Yu OHTSUKA, Takakazu YAMAMOTO, Takahisa SHIMIZU, Takayuki SASAKI, Tomoaki YANAGIDA
  • Patent number: 8945769
    Abstract: An electricity storage device including a positive electrode 31, a negative electrode 32, and an electrolytic solution 29 located between the positive electrode and the negative electrode. At least one of the positive electrode 31 and the negative electrode 32 contains an electricity storage material containing a polymerization product having a tetrachalcogenofulvalene structure in a repeat unit of a main chain.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: February 3, 2015
    Assignee: Panasonic Corporation
    Inventors: Nobuhiko Hojo, Yu Ohtsuka, Takakazu Yamamoto, Takahisa Shimizu, Takayuki Sasaki, Tomoaki Yanagida
  • Patent number: 8481674
    Abstract: A polymer having a repeating unit structure represented by the following general formula (1), wherein in general formula (1), Ph is a phenyl group; X is an oxygen atom, a sulfur atom, a selenium atom or a tellurium atom; and R1 and R1 each independently contains at least one selected from the group consisting of a chained saturated hydrocarbon group, a chained unsaturated hydrocarbon group, a cyclic saturated hydrocarbon group, a cyclic unsaturated hydrocarbon group, a phenyl group, a hydrogen atom, a hydroxyl group, a cyano group, an amino group, a nitro group and a nitroso group.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: July 9, 2013
    Assignee: Panasonic Corporation
    Inventors: Takakazu Yamamoto, Hiroki Fukumoto, Takahisa Shimizu, Tomoaki Yanagida, Yu Ohtsuka, Nobuhiko Hojo
  • Patent number: 8253158
    Abstract: One embodiment of the present invention is an organic electroluminescence display, including: a substrate with a partition wall between adjacent organic electroluminescence elements; a first electrode layer formed on the substrate; a hole transport layer formed on both the first electrode layer and the partition wall; an underlayer formed on the hole transport layer; a first light emitting layer formed on the underlayer, emitted light from the first light emitting layer having a first wavelength; a second light emitting layer formed so as to partially overlap the first light emitting layer, emitted light from the second light emitting layer having a second wavelength, and the second wavelength being longer than the first wavelength; and a second electrode layer, wherein overlapping point of the first light emitting layer and the second light emitting layer is above the partition wall.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: August 28, 2012
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Takahisa Shimizu, Shohei Kimura, Tatsuya Midorikawa, Shinya Abe
  • Patent number: 8231933
    Abstract: One embodiment of the present invention is a method for manufacturing an organic electroluminescence device, including forming an organic light emitting layer by a relief printing method, the method including transferring an organic light emitting material ink from an ink supplier to a printing plate, and subsequently transferring the organic light emitting material ink from the printing plate to a substrate, wherein a solvent of the organic light emitting material ink comprises a solvent having a vapor pressure over 500 Pa at 20-25 degrees Celsius, and wherein the time between the reception of the ink by the printing plate and the transfer of the ink to the substrate is equal to or less than 5 seconds.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: July 31, 2012
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Koji Takeshita, Takahisa Shimizu, Hironori Kawakami, Nahoko Inokuchi, Tomoaki Fukuhara, Hiroshi Matsuzawa
  • Publication number: 20120138904
    Abstract: An organic electroluminescence display includes a substrate, a first electrode layer formed on the substrate, a first light emitting layer formed on the first electrode layer and emitting light with a first wavelength, a second light emitting layer formed to overlap at least a part thereof with the first light emitting layer and emitting light with a second wavelength longer than the first wavelength, and a second electrode layer formed on the first or second light emitting layer.
    Type: Application
    Filed: September 19, 2008
    Publication date: June 7, 2012
    Inventors: Takahisa Shimizu, Koji Takeshita, Hironori Kawakami, Nahoko Inokuchi
  • Patent number: 8137147
    Abstract: A method for manufacturing an organic electroluminescence display includes forming a first electrode, forming an organic light emitting medium layer including an organic light emitting layer on the first electrode, the respective organic light emitting medium layers including respective organic light emitting layers having different life-times in light emitting, and forming a second electrode on the organic light emitting medium layer, wherein the organic light emitting layer having a longer life-time is formed earlier.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: March 20, 2012
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Takahisa Shimizu, Koji Takeshita, Hironori Kawakami, Nahoko Inokuchi
  • Publication number: 20120025192
    Abstract: One embodiment of the present invention is an organic electroluminescence display, including: a substrate with a partition wall between adjacent organic electroluminescence elements; a first electrode layer formed on the substrate; a hole transport layer formed on both the first electrode layer and the partition wall; an underlayer formed on the hole transport layer; a first light emitting layer formed on the underlayer, emitted light from the first light emitting layer having a first wavelength; a second light emitting layer formed so as to partially overlap the first light emitting layer, emitted light from the second light emitting layer having a second wavelength, and the second wavelength being longer than the first wavelength; and a second electrode layer, wherein overlapping point of the first light emitting layer and the second light emitting layer is above the partition wall.
    Type: Application
    Filed: August 12, 2011
    Publication date: February 2, 2012
    Applicant: Toppan Printing Co., Ltd.
    Inventors: Takahisa Shimizu, Shohei Kimura, Tatsuya Midorikawa, Shinya Abe
  • Patent number: 8040049
    Abstract: One embodiment of the present invention is a method for manufacturing an organic electroluminescence element wherein the organic electroluminescence has a substrate, a partition wall on the substrate, a pixel on the substrate sectioned by the partition wall, an organic luminescent layer on the pixel, forming an under-layer on the entire surface of a luminescent area including the inside surface of the pixel and the upper surface of the partition wall and forming the organic luminescent layer by coating an ink which includes an organic luminous material by a printing method on the surface of the under-layer.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: October 18, 2011
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Syohei Kimura, Koji Takeshita, Takahisa Shimizu