Patents by Inventor Jin Amagai

Jin Amagai 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: 10538702
    Abstract: The present invention is a fluorescent material characterized by being represented by a composition of the following formula (1) and having a crystal lattice distortion obtained from a Williamson-Hall plot by X-ray diffraction within the range of 0.0005 to 0.0020. (Sr,Ca,M)3-xMgSi2O8:Eux??formula (1) wherein M is at least one rare earth metal elements selected from the group consisting of Sc, Y, Gd, Tb and La, and 0.01?x?0.10. Also, the present invention is a light-emitting device including the fluorescent material, and a light source that emits light by irradiating the fluorescent material with excitation light. Furthermore, the present invention is a method for producing the fluorescent material, including the steps of: obtaining an aqueous slurry of a raw material; and spray-drying the aqueous slurry with hot air at 80 to 300° C.
    Type: Grant
    Filed: December 25, 2015
    Date of Patent: January 21, 2020
    Assignee: Ube Industries, Ltd.
    Inventors: Kouichi Fukuda, Kaoru Takazaki, Jin Amagai, Toru Inagaki, Masaki Tanaka, Tatsunori Sakaguchi
  • Publication number: 20190067530
    Abstract: A blue light-emitting Eu-activated silicate phosphor having a constitutional formula of Sr3MgSi2O3 which contains Eu in an amount of 0.001 to 0.2 mol per one mole of Mg and further a rare earth metal element selected from the group consisting of Sc, Y, Gd, Tb and La in an amount of 0.0001 to 0.03 mol, per one mole of Mg, gives an emission with enhanced emission strength when it is excited with a light having a wavelength in the region of 350 to 430 nm.
    Type: Application
    Filed: October 29, 2018
    Publication date: February 28, 2019
    Inventors: Kouichi FUKUDA, Jin AMAGAI, Seiji NOGUCHI, Toru INAGAKI, Masaki TANAKA
  • Publication number: 20170349823
    Abstract: The present invention is a fluorescent material characterized by being represented by a composition of the following formula (1) and having a crystal lattice distortion obtained from a Williamson-Hall plot by X-ray diffraction within the range of 0.0005 to 0.0020. (Sr,Ca,M)3-xMgSi2O8:Eux formula (1) wherein M is at least one rare earth metal elements selected from the group consisting of Sc, Y, Gd, Tb and La, and 0.01?x?0.10. Also, the present invention is a light-emitting device including the fluorescent material, and a light source that emits light by irradiating the fluorescent material with excitation light. Furthermore, the present invention is a method for producing the fluorescent material, including the steps of: obtaining an aqueous slurry of a raw material; and spray-drying the aqueous slurry with hot air at 80 to 300° C.
    Type: Application
    Filed: December 25, 2015
    Publication date: December 7, 2017
    Applicant: Ube Industries, Ltd.
    Inventors: Kouichi Fukuda, Kaoru Takazaki, Jin Amagai, Toru Inagaki, Masaki Tanaka, Tatsunori Sakaguchi
  • Publication number: 20170321120
    Abstract: Provided is a phosphor represented by a composition of the following formula (1), (Sra,Bab,Cac,Eux,M1d,M2e)SiOf.gMgO??formula (1) (here, M1 represents at least one group 3 element selected from Lu and Sc, M2 represents an alkali metal element selected from Li, Na, and K, and 0<a?2, 0<b?2, 0?c?2, 0.0015?d?0.045, 0?e?0.06, 0<x?0.1, 3.7?f?4.1, and 0?g?1 are satisfied). In addition, provided is a light-emitting device including the phosphor and a light source for irradiating the phosphor with excitation light to cause the phosphor to emit light.
    Type: Application
    Filed: November 4, 2015
    Publication date: November 9, 2017
    Applicant: Ube Industries, Ltd.
    Inventors: Jin Amagai, Kouichi Fukuda, Tatsunori Sakaguchi
  • Patent number: 9758725
    Abstract: There is provided a fluorescent material having a composition represented by the following Formula (1). (Sra,Bab,Eux,M11,M2e)SiOf·cMgO . . . Formula (1) (In the formula, M1 is at least one tertiary group element selected from Y and Tb; M2 is an alkali metal selected from Li, Na, and K; and 0<a<2, 0<b<2, 0?c<1, 0.001?d?0.06, 0?e?0.06, 0<x<0.1, and 3.7?f?4.1 are set.) Further, there is provided a light-emitting device including: the fluorescent material; and a light source irradiating the fluorescent material with excitation light to cause the fluorescent material to emit light.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: September 12, 2017
    Assignee: Ube Industries, Ltd.
    Inventors: Jin Amagai, Kouichi Fukuda
  • Patent number: 9605200
    Abstract: The deep red light-emitting magnesium fluorogermanate phosphor prepared by calcining a mixture comprising a fine magnesium oxide powder having a BET specific surface area in the range of 5-200 m2/g, a fluorine compound, a germanium compound and a manganese compound gives a light emission having a maximum peak of increased strength in the wavelength region of 640-680 nm upon excitation with a light having a wavelength of 400 nm.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: March 28, 2017
    Assignees: UBE MATERIAL INDUSTRIES, LTD., UBE INDUSTRIES, LTD.
    Inventors: Kouichi Fukuda, Rika Nogita, Jin Amagai, Toru Inagaki
  • Publication number: 20160333266
    Abstract: There is provided a fluorescent material having a composition represented by the following Formula (1). (Sra, Bab, Eux, M11, M2e) SiOf.cMgO . . . Formula (1) (In the formula, M1 is at least one tertiary group element selected from Y and Tb; M2 is an alkali metal selected from Li, Na, and K; and 0<a<2, 0<b<2, 0?c<1, 0.001?d?0.06, 0?e?0.06, 0<x<0.1, and 3.7?f?4.1 are set.) Further, there is provided a light-emitting device including: the fluorescent material; and a light source irradiating the fluorescent material with excitation light to cause the fluorescent material to emit light.
    Type: Application
    Filed: January 21, 2015
    Publication date: November 17, 2016
    Applicant: Ube Industries, Ltd.
    Inventors: Jin Amagai, Kouichi Fukuda
  • Patent number: 9428689
    Abstract: A solid light-emitting device comprising a light-emitting semiconductor element and a phosphor dispersed in a sealant, in which the phosphor is exited by the light emitted by the semiconductor element to emit a visible light of a wavelength differing from that of the light emitted by the semiconductor element and is a silicate phosphor or a phosphor having a hydroxyl group on its surface, and the sealant is a condensation product of a prepolymer produced by condensation of polydimethyl-siloxane having a silanol group at both ends and an oligomer of an alkoxide of a metal or a semimetal or its derivative.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: August 30, 2016
    Assignee: Ube Industries, Ltd.
    Inventors: Takuya Shindo, Midori Sato, Koichi Fukuda, Kaoru Takazaki, Jin Amagai, Rika Nogita, Toru Inagaki, Kenji Arima
  • Publication number: 20160222288
    Abstract: A silicate phosphor produced by a method of firing in a reducing atmosphere a mixture comprising a silicon compound, a strontium compound and a barium compound in a ratio providing strontium barium silicate and a europium compound in the presence of two or more halide compounds selected from a group consisting of fluoride, chloride and bromide exhibits higher external quantum efficiency to a light in the wavelength region of ultraviolet light to blue light, as compared with a silicate phosphor produced by a method of firing in a reducing atmosphere the mixture in the presence of a single halide.
    Type: Application
    Filed: September 12, 2014
    Publication date: August 4, 2016
    Inventors: Koichi FUKUDA, Kenji ARIMA, Jin AMAGAI
  • Publication number: 20160211424
    Abstract: A blue light-emitting Eu-activated silicate phosphor having a constitutional formula of Sr3MgSi2O8 which contains Eu in an amount of 0.001 to 0.2 mol per one mole of Mg and further a rare earth metal element selected from the group consisting of Sc, Y, Gd, Tb and La in an amount of 0.0001 to 0.03 mol, per one mole of Mg, gives an emission with enhanced emission strength when it is excited with a light having a wavelength in the region of 350 to 430 nm.
    Type: Application
    Filed: March 29, 2016
    Publication date: July 21, 2016
    Inventors: Kouichi FUKUDA, Jin AMAGAI, Seiji NOGUCHI, Toru INAGAKI, Masaki TANAKA
  • Patent number: 9117981
    Abstract: A silicate phosphor having a coating layer comprising a fluorine-containing compound on its surface which is obtained by a method of heating a mixture of 100 weight parts of a silicate phosphor and 0.5-15 weight parts of ammonium fluoride at a temperature in the range of 200 to 600° C. exhibits high light emission intensity and high moisture resistance.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: August 25, 2015
    Assignee: UBE Material Industries, Ltd.
    Inventors: Kouichi Fukuda, Jin Amagai, Seiji Noguchi, Toru Inagaki, Masaki Tanaka
  • Publication number: 20150171288
    Abstract: A solid light-emitting device comprising a light-emitting semiconductor element and a phosphor dispersed in a sealant, in which the phosphor is exited by the light emitted by the semiconductor element to emit a visible light of a wavelength differing from that of the light emitted by the semiconductor element and is a silicate phosphor or a phosphor having a hydroxyl group on its surface, and the sealant is a condensation product of a prepolymer produced by condensation of polydimethyl-siloxane having a silanol group at both ends and an oligomer of an alkoxide of a metal or a semimetal or its derivative.
    Type: Application
    Filed: December 16, 2014
    Publication date: June 18, 2015
    Inventors: Takuya SHINDO, Midori SATO, Koichi FUKUDA, Kaoru TAKAZAKI, Jin AMAGAI, Rika NOGITA, Toru INAGAKI, Kenji ARIMA
  • Patent number: 9011718
    Abstract: The emission strength of a light released from a blue light-emitting phosphor having a merwinite crystal structure and an elemental formula of (Sr,Ca)3MgSi2O8 activated with Eu in which a molar ratio of Sr and Ca is in the range of 1:0.10 to 1:0.30 is stable in a wide temperature range.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: April 21, 2015
    Assignee: Ube Material Industries, Ltd.
    Inventors: Kouichi Fukuda, Jin Amagai, Seiji Noguchi, Toru Inagaki, Masaki Tanaka
  • Publication number: 20150102261
    Abstract: A phosphor mixture comprising at least two phosphors A, B which give an emission spectrum having the maximum emission peak in the visible region, in which a wavelength of the maximum emission peak of the phosphor A differs from that of the maximum emission peak of the phosphor B by not more than 50 nm, and in which the maximum emission peak of the phosphor A has an emission intensity less than that of the phosphor B and the maximum emission peak of the phosphor A shows a half-width more than a half-width of that of the phosphor B gives an light emission having the maximum emission peak whose emission intensity is higher than that of the phosphor A and whose half-width is broader than that of the phosphor B.
    Type: Application
    Filed: May 22, 2013
    Publication date: April 16, 2015
    Inventors: Kouichi Fukuda, Jin Amagai, Toru Inagaki, Rika Nogita, Kenji Arima
  • Patent number: 8956554
    Abstract: A green light-emitting silicate phosphor comprising Eu-activated strontium barium silicate which has a crystal phase of magnesium oxide or a merwinite crystal phase and contains 0.15 to 0.90 mol of magnesium per one mol of silicon gives a light emission stable at elevated temperatures.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: February 17, 2015
    Assignee: Ube Materials Industries, Ltd.
    Inventors: Kouichi Fukuda, Jin Amagai, Toru Inagaki
  • Publication number: 20150041843
    Abstract: The deep red light-emitting magnesium fluorogermanate phosphor prepared by calcining a mixture comprising a fine magnesium oxide powder having a BET specific surface area in the range of 5-200 m2/g, a fluorine compound, a germanium compound and a manganese compound gives a light emission having a maximum peak of increased strength in the wavelength region of 640-680 nm upon excitation with a light having a wavelength of 400 nm.
    Type: Application
    Filed: March 26, 2013
    Publication date: February 12, 2015
    Inventors: Kouichi Fukuda, Rika Nogita, Jin Amagai, Toru Inagaki
  • Publication number: 20140151732
    Abstract: A blue light-emitting Eu-activated silicate phosphor having a constitutional formula of Sr3MgSi2O8 which contains Eu in an amount of 0.001 to 0.2 mol per one mole of Mg and further a rare earth metal element selected from the group consisting of Sc, Y, Gd, Tb and La in an amount of 0.0001 to 0.03 mol, per one mole of Mg, gives an emission with enhanced emission strength when it is excited with a light having a wavelength in the region of 350 to 430 nm.
    Type: Application
    Filed: February 24, 2012
    Publication date: June 5, 2014
    Applicant: UBE MATERIAL INDUSTRIES, LTD.
    Inventors: Kouichi Fukuda, Jin Amagai, Seiji Noguchi, Toru Inagaki, Masaki Tanaka
  • Publication number: 20140084780
    Abstract: The emission strength of a light released from a blue light-emitting phosphor having a merwinite crystal structure and an elemental formula of (Sr,Ca)3MgSi2O8 activated with Eu in which a molar ratio of Sr and Ca is in the range of 1:0.10 to 1:0.30 is stable in a wide temperature range.
    Type: Application
    Filed: September 25, 2012
    Publication date: March 27, 2014
    Applicant: UBE MATERIAL INDUSTRIES, LTD.
    Inventors: Kouichi FUKUDA, Jin AMAGAI, Seiji NOGUCHI, Toru INAGAKI, Masaki TANAKA
  • Publication number: 20140054634
    Abstract: A silicate phosphor having a coating layer comprising a fluorine-containing compound on its surface which is obtained by a method of heating a mixture of 100 weight parts of a silicate phosphor and 0.5-15 weight parts of ammonium fluoride at a temperature in the range of 200 to 600° C. exhibits high light emission intensity and high moisture resistance.
    Type: Application
    Filed: November 22, 2011
    Publication date: February 27, 2014
    Applicant: UBE MATERIAL INDUSTRIES ,LTD.
    Inventors: Kouichi Fukuda, Jin Amagai, Seiji Noguchi, Toru Inagaki, Masaki Tanaka