Patents by Inventor Kazunari Kawamoto

Kazunari Kawamoto 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).

  • Publication number: 20240215447
    Abstract: An organic electroluminescence device may include an emitting layer between an anode and a cathode, in which the emitting layer contains a first compound that fluoresces, a second compound that exhibits delayed fluorescence, and a third compound. The first compound may have formula (1): the second compound may have formula (2): the third compound may have formula (3): , and a singlet energy of the first compound S1(M1), a singlet energy of the second compound S1(M2), and a singlet energy of the third compound S1(M3) satisfy a Inequality S1(M3)>S1(M2)>S1(M1) ??(Eq. 1).
    Type: Application
    Filed: February 16, 2022
    Publication date: June 27, 2024
    Applicants: IDEMITSU KOSAN CO.,LTD., TORAY INDUSTRIES, INC.
    Inventors: Hiromi NAKANO, Hisato MATSUMOTO, Takushi SHIOMI, Toshinari OGIWARA, Keiichi YASUKAWA, Kazunari KAWAMOTO, Takashi TOKUDA, Kazumasa NAGAO
  • Publication number: 20220407007
    Abstract: The present invention provides a pyrromethene boron complex represented by the general formula (1), a light emitting element material having high luminance efficiency, and a light emitting element: wherein X1 and X2 each may be the same or different, and are selected from the group consisting of an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a thiol group, an alkoxy group, a cycloalkoxy group, an alkylthio group, an aryl ether group, an aryl thioether group, an aryl group, a heteroaryl group, halogen and a cyano group. These functional groups may further have a substituent. Ar1 to Ar4 each may be the same or different, and are a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group. The aryl group and the heteroaryl group may be either a monocyclic ring or a fused ring.
    Type: Application
    Filed: October 28, 2020
    Publication date: December 22, 2022
    Applicant: Toray Industries, Inc.
    Inventors: Kazunari Kawamoto, Takashi Tokuda, Kazumasa Nagao
  • Publication number: 20220263030
    Abstract: An organic-EL device includes an emitting-layer, first-layer adjacent to the emitting-layer near the anode, and second-layer adjacent to the emitting-layer near the cathode. The emitting-layer contains first, second and third compounds. The first-layer contains a compound of formula-(A). The second-layer contains a compound of formula-(B). The first, second and third compounds are a fluorescent compound of formula-(1), delayed-fluorescent compound of formula-(2), and compound of formula-(3), respectively. Singlet energies S1 of the first to third compounds satisfy S1(M3)>S1(M2)>S1(M1). In the formula-(A), Ra1-Ra5 etc. each represent a substituent etc. In the formula-(B), X1-X3 each represent N atom etc, Ar1 and Ar2 each represent a group of formula-(1B) etc. A represents the group of the formula-(1B). In the formula-(1B), HAr is of formula-(2B), a is 1 to 5, and L1 is a linking group etc. In the formula-(2B), X11-X18 each represent N atom etc, and Y1 represent O, S, or N atom etc.
    Type: Application
    Filed: July 20, 2020
    Publication date: August 18, 2022
    Applicants: IDEMITSU KOSAN CO.,LTD., TORAY INDUSTRIES, INC.
    Inventors: Hiromi NAKANO, Hisato MATSUMOTO, Takushi SHIOMI, Toshinari OGIWARA, Keiji OKINAKA, Kazunari KAWAMOTO, Takashi TOKUDA, Kazumasa NAGAO
  • Publication number: 20220102637
    Abstract: An object of the present invention is to provide a red-light-emitting material and a red-light-emitting element that have high luminous efficiency and excellent color purity. The present invention is a pyrromethene metal complex represented by a specific general formula.
    Type: Application
    Filed: March 5, 2020
    Publication date: March 31, 2022
    Applicant: Toray Industries, Inc.
    Inventors: Kazunari Kawamoto, Takashi Tokuda, Kazumasa Nagao
  • Patent number: 9193833
    Abstract: A phosphor-containing cured silicone that is a cured silicone which has a structure represented by general formulae (1) and/or (2) and also has units selected from general formulae (3) and/or (4), the phosphor-containing cured silicone includes a phosphor and particles having units selected from general formulae (3) and/or (4): wherein R1 to R3 are each a hydrogen atom, a methyl group, an ethyl group or a propyl group; X represents a methylene group, a dimethylene group or a trimethylene group, and may be the same or different; and R4 to R6 are each a substituted or unsubstituted monovalent hydrocarbon group, and may be the same or different. An object of the present invention is to provide a cured silicone in which a phosphor is uniformly dispersed, the cured silicone is characterized in that a silicone material has good thermal resistance and lightfastness.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: November 24, 2015
    Assignee: Toray Industries, Inc.
    Inventors: Kazuki Goto, Tetsuya Goto, Masuichi Eguchi, Takao Kitagawa, Kazunari Kawamoto, Yutaka Ishida, Hirofumi Tsuchiya, Takayoshi Akamatsu
  • Patent number: 9117979
    Abstract: The present invention provides a phosphor sheet in which the optical properties thereof are not impaired and which exhibits excellent film thickness uniformity even when comprising large-sized phosphor particles in high concentration. In one embodiment, the invention provides a phosphor sheet in which the content of phosphor is 53 weight % or more of the total sheet, and in another embodiment, a phosphor sheet includes at least a silicone resin, a phosphor and silicone fine particles.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: August 25, 2015
    Assignee: Toray Industries, Inc.
    Inventors: Nobuo Matsumura, Yutaka Ishida, Kazunari Kawamoto, Kazuki Goto, Takao Kitagawa, Takejiro Inoue, Hironobu Sadakuni, Hiroki Sekiguchi, Masahiro Yoshioka
  • Patent number: 8946983
    Abstract: A phosphor-containing sheet having a storage modulus of 0.1 MPa or more at 25° C. and a storage modulus of less than 0.1 MPa at 100° C., wherein a resin main component of the phosphor-containing sheet is a crosslinked product formed by subjecting a crosslinkable silicone composition containing a specific composition to a hydrosilylation reaction. This phosphor-containing sheet provides a phosphor sheet having good shapability and high adhesive power as a phosphor sheet bonded to an LED chip as a wavelength conversion layer.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: February 3, 2015
    Assignee: Toray Industries, Inc.
    Inventors: Nobuo Matsumura, Takejiro Inoue, Hironobu Sadakuni, Yutake Ishida, Kazunari Kawamoto, Masahiro Yoshioka, Tetsuya Goto
  • Publication number: 20140339582
    Abstract: In order to improve the color and luminance uniformity of an LED chip with a phosphor-containing resin sheet obtained by adhering the phosphor-containing resin sheet to the LED chip, improve the ease of production, and improve the degree of freedom in design, etc., provided is a resin sheet laminate provided with a phosphor-containing resin sheet on a base material, wherein the phosphor-containing resin sheet is divided into a plurality of sections.
    Type: Application
    Filed: April 24, 2012
    Publication date: November 20, 2014
    Inventors: Nobuo Matsumura, Yutaka Ishida Matsumura, Kazunari Kawamoto, Takejiro Inoue, Hironobu Sadakuni, Masshiro Yoshioka, Takao Kitagawa
  • Publication number: 20140210338
    Abstract: A phosphor-containing sheet having a storage modulus of 0.1 MPa or more at 25° C. and a storage modulus of less than 0.1 MPa at 100° C., wherein a resin main component of the phosphor-containing sheet is a crosslinked product formed by subjecting a crosslinkable silicone composition containing a specific composition to a hydrosilylation reaction. This phosphor-containing sheet provides a phosphor sheet having good shapability and high adhesive power as a phosphor sheet bonded to an LED chip as a wavelength conversion layer.
    Type: Application
    Filed: May 14, 2012
    Publication date: July 31, 2014
    Applicant: Toray Industries, Inc.
    Inventors: Nobuo Matsumura, Takejiro Inoue, Hironobu Sadakuni, Yutake Ishida, Kazunari Kawamoto, Masahiro Yoshioka, Tetsuya Goto
  • Publication number: 20130264601
    Abstract: The present invention provides a phosphor sheet in which the optical properties thereof are not impaired and which exhibits excellent film thickness uniformity even when comprising large-sized phosphor particles in high concentration. In one embodiment, the invention provides a phosphor sheet in which the content of phosphor is 53 weight % or more of the total sheet, and in another embodiment, a phosphor sheet includes at least a silicone resin, a phosphor and silicone fine particles.
    Type: Application
    Filed: December 1, 2011
    Publication date: October 10, 2013
    Applicant: Toray Industries, Inc.
    Inventors: Nobuo Matsumura, Yutaka Ishida, Kazunari Kawamoto, Kazuki Goto, Takao Kitagawa, Takejiro Inoue, Hironobu Sadakuni, Hiroki Sekiguchi, Masahiro Yoshioka
  • Publication number: 20130125365
    Abstract: A phosphor-containing cured silicone that is a cured silicone which has a structure represented by general formulae (1) and/or (2) and also has units selected from general formulae (3) and/or (4), the phosphor-containing cured silicone includes a phosphor and particles having units selected from general formulae (3) and/or (4): wherein R1 to R3 are each a hydrogen atom, a methyl group, an ethyl group or a propyl group; X represents a methylene group, a dimethylene group or a trimethylene group, and may be the same or different; and R4 to R6 are each a substituted or unsubstituted monovalent hydrocarbon group, and may be the same or different. An object of the present invention is to provide a cured silicone in which a phosphor is uniformly dispersed, the cured silicone is characterized in that a silicone material has good thermal resistance and lightfastness.
    Type: Application
    Filed: February 9, 2011
    Publication date: May 23, 2013
    Inventors: Kazuki Goto, Tetsuya Goto, Masuichi Eguchi, Takao Kitagawa, Kazunari Kawamoto, Yutaka Ishida, Hirofumi Tsuchiya, Takayoshi Akamatsu