Patents by Inventor Encarnacion Antonia Garcia Villora
Encarnacion Antonia Garcia Villora 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).
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Publication number: 20230323198Abstract: A wavelength conversion member includes a support, and a wavelength conversion layer that includes a phosphor particle group and a sealing member to seal the phosphor particle group and that is provided directly or through an other layer on the support. A predetermined region, in which a cross-sectional area rate of the phosphor particle group is not less than 50%, is included in an arbitrary cross section of the wavelength conversion layer taken parallel to a thickness direction thereof. The predetermined region includes a rectangular region with a width of 700 ?m and a thickness of 50 ?m from a bottom surface of the wavelength conversion layer when a thickness of the wavelength conversion layer is not less than 50 ?m, or a rectangular region with a width of 700 ?m and a thickness equal to the thickness of the wavelength conversion layer when it is less than 50 ?m.Type: ApplicationFiled: September 30, 2020Publication date: October 12, 2023Applicants: TAMURA CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Daisuke INOMATA, Rikiya SUZUKI, Yusuke ARAI, Yoshihiro YAMASHITA, Hiroyuki SAWANO, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
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Patent number: 11525082Abstract: Provided is a particulate phosphor including a single crystal having a composition represented by a compositional formula (Y1-x-y-zLuxGdyCez)3+aAl5?aO12 (0?x?0.9994, 0?y?0.0669, 0.001?z?0.004, ?0.016?a?0.315) and a particle diameter (D50) of not less than 20 ?m. Also provided is a light-emitting device including a phosphor-including member that includes the phosphor and a sealing member including a transparent inorganic material sealing the phosphor or a binder including an inorganic material binding particles of the phosphor, and a light-emitting element that emits a blue light for exciting the phosphor.Type: GrantFiled: February 2, 2017Date of Patent: December 13, 2022Assignees: Tamura Corporation, National Institute for Materials ScienceInventors: Daisuke Inomata, Yusuke Arai, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
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Publication number: 20220282151Abstract: A wavelength conversion member includes a sintered body of a phosphor. An average diameter of pores in an arbitrary cross section falls within a range of not less than 0.28 ?m and not more than 0.98 ?m. A ratio of an area of pores to a whole area in an arbitrary cross section falls within a range of not less than 0.04% and not more than 2.7%. An average diameter of grains of the phosphor in an arbitrary cross section falls within a range of not less than 1 ?m and not more than 3 ?m.Type: ApplicationFiled: August 7, 2020Publication date: September 8, 2022Applicants: TAMURA CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Yusuke ARAI, Hiroyuki SAWANO, Daisuke INOMATA, Yoshihiro YAMASHITA, Rikiya SUZUKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
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Publication number: 20210122975Abstract: Provided is a particulate phosphor including a single crystal having a composition represented by a compositional formula (Y1-x-y-zLuxGdyCez)3+aAl5?aO12 (0?x?0.9994, 0?y?0.0669, 0.001?z?0.004, ?0.016?a?0.315) and a particle diameter (D50) of not less than 20 ?m. Also provided is a light-emitting device including a phosphor-including member that includes the phosphor and a sealing member including a transparent inorganic material sealing the phosphor or a binder including an inorganic material binding particles of the phosphor, and a light-emitting element that emits a blue light for exciting the phosphor.Type: ApplicationFiled: February 2, 2017Publication date: April 29, 2021Applicants: TAMURA CORPORATION, KOHA CO., LTD., National Institute for Materials ScienceInventors: Daisuke INOMATA, Yusuke ARAI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
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Patent number: 10836961Abstract: A phosphor-containing member includes a transparent member, and a plurality of granular single crystal phosphors dispersed in the transparent member. Each of the plurality of granular single crystal phosphors includes a YAG crystal as a mother crystal. The plurality of granular single crystal phosphors are prepared by crushing the YAG crystal. The YAG crystal has a composition represented by a formula of Y3-x-yGdxCeyAl5O12-w (0.03?x?0.2, 0.003?y?0.2, ?0.2?w?0.2). Reduction of fluorescence intensity of the phosphors is less than 3% when an excitation light wavelength is 460 nm and a temperature is increased from 25° C. to 100° C.Type: GrantFiled: October 4, 2017Date of Patent: November 17, 2020Assignees: KOHA CO., LTD., NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Makoto Watanabe, Daisuke Inomata, Kazuo Aoki, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
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Publication number: 20200220052Abstract: As one of purposes, the present invention provides: a single-crystal phosphor which can exhibit excellent properties under high-temperature conditions; and a light-emitting device in which the phosphor is used. As one embodiment, a single-crystal phosphor is provided, which has a chemical composition represented by the compositional formula: Y1-x-y-zLuxGdyCez)3+aAl5-aO12(0?x?0.9994, 0?y?0.0669, 0.0002?z?0.0067,?0.016?a?0.315).Type: ApplicationFiled: March 17, 2020Publication date: July 9, 2020Applicants: KOHA CO., LTD., NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Daisuke INOMATA, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
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Patent number: 10700261Abstract: A piezoelectric material for a combustion pressure sensor, a method for producing the piezoelectric material, and a combustion pressure sensor using the piezoelectric material are provided. The piezoelectric material of the present invention includes a single crystal containing Ca, Ta, an element M (M is Al or Ga), Si, and O, the single crystal has the same crystal structure as the crystal structure of langasite represented by La3Ga5SiO14, and at least the content of the element M is insufficient for the stoichiometric composition represented by Ca3TaM3Si2O14. Preferably, in a case where the element M is Ga, each content of the Ca and the Si is excessive for the stoichiometric composition, and in a case where the element M is Al, the content of the Ca is excessive for the stoichiometric composition, and the content of the Ta is insufficient for the stoichiometric composition.Type: GrantFiled: June 1, 2016Date of Patent: June 30, 2020Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora, Isao Sakaguchi, Naoki Ohashi
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Publication number: 20200203581Abstract: A phosphor-containing member includes a transparent member, and particles of a single crystal phosphor dispersed in the transparent member. The single crystal phosphor has a composition represented by a compositional formula (Y1?a?bLuaCeb)3+cAl5?cO12 (where 0?a?0.9994, 0.0002?b?0.0067, ?0.016?c?0.315), and Commission International de l'Eclairage (CIE) chromaticity coordinates x, y of an emission spectrum satisfy a relationship of ?0.4377x+0.7384?y??0.4377x+0.7504 when a peak wavelength of excitation light is 450 nm and temperature is 25° C.Type: ApplicationFiled: February 27, 2020Publication date: June 25, 2020Inventors: Daisuke INOMATA, Yusuke ARAI, Hiroaki SANO, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
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Patent number: 10340429Abstract: According to one embodiment of the present invention, the light emitting device includes an LED element, a side wall which surrounds the LED element, a phosphor layer which is fixed to the side wall with an adhesive layer therebetween, and is positioned above the LED element, and a metal pad as a heat dissipating member. The side wall includes an insulating base which surrounds the LED element and a metal layer which is formed on a side surface at the LED element side of the base, and is in contact with the metal pad and the adhesive layer. The adhesive layer includes a resin layer that includes a resin containing particles which have higher thermal conductivity than the resin or a layer that includes solder.Type: GrantFiled: March 16, 2017Date of Patent: July 2, 2019Assignees: KOHA CO., LTD., TAMURA CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Daisuke Inomata, Hiroaki Sano, Seitaro Yoshida, Kazuo Aoki, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
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Publication number: 20180175281Abstract: A piezoelectric material for a combustion pressure sensor, a method for producing the piezoelectric material, and a combustion pressure sensor using the piezoelectric material are provided. The piezoelectric material of the present invention includes a single crystal containing Ca, Ta, an element M (M is Al or Ga), Si, and O, the single crystal has the same crystal structure as the crystal structure of langasite represented by La3Ga5SiO14, and at least the content of the element M is insufficient for the stoichiometric composition represented by Ca3TaM3Si2O14. Preferably, in a case where the element M is Ga, each content of the Ca and the Si is excessive for the stoichiometric composition, and in a case where the element M is Al, the content of the Ca is excessive for the stoichiometric composition, and the content of the Ta is insufficient for the stoichiometric composition.Type: ApplicationFiled: June 1, 2016Publication date: June 21, 2018Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA, Isao SAKAGUCHI, Naoki OHASHI
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Publication number: 20180044588Abstract: A flat plate-shaped phosphor member includes a plurality of granular single crystal phosphors, each of which including a YAG crystal as a mother crystal, the YAG crystal having a composition represented by a formula of Y3-x-yGdxCeyAl5O12-w (0.03?x?0.2, 0.003?y?0.2, ?0.2?w?0.2). Reduction of fluorescence intensity of the phosphor is less than 3% when an excitation light wavelength is 460 nm and a temperature is increased from 25° C. to 100° C.Type: ApplicationFiled: October 4, 2017Publication date: February 15, 2018Inventors: Makoto WATANABE, Daisuke INOMATA, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
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Publication number: 20170186923Abstract: According to one embodiment of the present invention, the light emitting device includes an LED element, a side wall which surrounds the LED element, a phosphor layer which is fixed to the side wall with an adhesive layer therebetween, and is positioned above the LED element, and a metal pad as a heat dissipating member. The side wall includes an insulating base which surrounds the LED element and a metal layer which is formed on a side surface at the LED element side of the base, and is in contact with the metal pad and the adhesive layer. The adhesive layer includes a resin layer that includes a resin containing particles which have higher thermal conductivity than the resin or a layer that includes solder.Type: ApplicationFiled: March 16, 2017Publication date: June 29, 2017Applicants: KOHA CO., LTD., TAMURA CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Daisuke INOMATA, Hiroaki SANO, Seitaro YOSHIDA, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
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Publication number: 20170179346Abstract: A light-emitting device includes a light-emitting element to emit a bluish light, and a yellowish phosphor to absorb the light emitted by the light-emitting element and produce a yellowish fluorescence. The yellowish phosphor comprises a single crystal phosphor comprising a composition represented by a compositional formula (Y1-a-bLuaCeb)3+cAl5-cO12 (where 0?a?0.9994, 0.001?b?0.0067, ?0.016?c?0.315. Commission International de l'Eclairage (CIE) chromaticity coordinates x and y of an emission spectrum obtained by using CIE 1931 color-matching function to satisfy a relationship of ?0.4377x+0.7384?y??0.4377x+0.7504 when a peak wavelength of excitation light is 450 nm and temperature is 25° C. The single crystal phosphor is disposed off of the light-emitting element.Type: ApplicationFiled: March 9, 2017Publication date: June 22, 2017Inventors: Daisuke INOMATA, Yusuke ARAI, Hiroaki SANO, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
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Patent number: 9634216Abstract: According to one embodiment of the present invention, the light emitting device includes an LED element, a side wall which surrounds the LED element, a phosphor layer which is fixed to the side wall with an adhesive layer therebetween, and is positioned above the LED element, and a metal pad as a heat dissipating member. The side wall includes an insulating base which surrounds the LED element and a metal layer which is formed on a side surface at the LED element side of the base, and is in contact with the metal pad and the adhesive layer. The adhesive layer includes a resin layer that includes a resin containing particles which have higher thermal conductivity than the resin or a layer that includes solder.Type: GrantFiled: August 8, 2014Date of Patent: April 25, 2017Assignees: Koha Co., Ltd., Tamura Corporation, National Institute for Materials ScienceInventors: Daisuke Inomata, Hiroaki Sano, Seitaro Yoshida, Kazuo Aoki, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
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Patent number: 9617470Abstract: An optical material used in a UV-excited yellow light-emitting material and an optical isolator, capable of emitting yellow light stably and highly efficiently even if a large current is fed to obtain the high luminance emission. The optical material used for the UV-excited yellow light-emitting material (2) and the optical isolator (210) is an oxide containing Ce, which is a terbium cerium aluminum garnet type single crystal wherein a part of terbium of a terbium aluminum garnet type single crystal is substituted by cerium. The ratio of number of moles of cerium to the total number of moles of terbium and cerium, namely the composition ratio of cerium, preferably falls within the range from 0.01 mol % to 50 mol %. A part of aluminum may be substituted by scandium or further by any one of terbium, cerium, yttrium, lutetium, ytterbium, and thulium.Type: GrantFiled: April 27, 2013Date of Patent: April 11, 2017Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
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Patent number: 9441153Abstract: A UV photoexcited red light-emitting material comprising a fluoride single crystal represented by the chemical formula: M1?xRExF2+x?w, wherein M is at least one metal element belonging to Group 2 of the Periodic Table selected from the group consisting of Be, Mg, Ca, Sr, and Ba, RE is a rare earth element, and the relationships: 0<x?0.4 and 0?w?0.5 are satisfied.Type: GrantFiled: April 25, 2013Date of Patent: September 13, 2016Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
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Publication number: 20160240748Abstract: As one of purposes, the present invention provides: a single-crystal phosphor which can exhibit excellent properties under high-temperature conditions; and a light-emitting device in which the phosphor is used. As one embodiment, a single-crystal phosphor is provided, which has a chemical composition represented by the compositional formula: (Y1-x-y-zLuxGdyCez)3+aAl5-aO12(0?x?0.9994, 0?y?0.0669, 0.0002?z?0.0067, ?0.016?a?0.315).Type: ApplicationFiled: October 20, 2014Publication date: August 18, 2016Applicants: KOHA CO., LTD., NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Daisuke Inomata, Kazuo Aoki, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
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Publication number: 20160190418Abstract: According to one embodiment of the present invention, the light emitting device includes an LED element, a side wall which surrounds the LED element, a phosphor layer which is fixed to the side wall with an adhesive layer therebetween, and is positioned above the LED element, and a metal pad as a heat dissipating member. The side wall includes an insulating base which surrounds the LED element and a metal layer which is formed on a side surface at the LED element side of the base, and is in contact with the metal pad and the adhesive layer. The adhesive layer includes a resin layer that includes a resin containing particles which have higher thermal conductivity than the resin or a layer that includes solder.Type: ApplicationFiled: August 8, 2014Publication date: June 30, 2016Applicants: KOHA CO., LTD., TAMURA CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Daisuke INOMATA, Hiroaki SANO, Seitaro YOSHIDA, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
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Publication number: 20160043289Abstract: Provided are a YAG-based single crystal phosphor which produces fluorescence in an unconventional color and a phosphor-containing member and a light emitting device including the single crystal phosphor. Provided is a single crystal phosphor which includes a composition represented by composition formula (Y1?a?bLuaCeb)3+cAl5?cO12 (wherein 0?a?0.9994, 0.0002?b?0.0067 and ?0.016?c?0.315), and in which CIE chromaticity coordinates x and y of an emission spectrum satisfy a relationship of ?0.4377x+0.7384?y??0.4585x+0.7504 when a peak wavelength of excitation light is 450 nm and temperature is 25° C.Type: ApplicationFiled: October 22, 2014Publication date: February 11, 2016Applicant: National Institute for Materials ScienceInventors: Daisuke INOMATA, Yusuke ARAI, Hiroaki SANO, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
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Patent number: 9190483Abstract: An AlN single crystal Schottky barrier diode including: an AlN single crystal substrate having a defect density of 106 cm?2 or less and a thickness of 300 ?m or more; a first electrode formed on one surface of the AlN single crystal substrate; and a second electrode formed on one surface of the AlN single crystal substrate while being spaced apart from the first electrode, the AlN single crystal Schottky barrier diode being provided with: a rectifying property such that an on-off ratio at the time of applying 10 V and ?40 V is at least 103 even at a high temperature of 573 K; a high voltage resistance such that a voltage can be applied at least within a range of ?40 V to 10 V; and a low on-resistance characteristic such that a current begins to flow at no greater than 5 V.Type: GrantFiled: January 30, 2013Date of Patent: November 17, 2015Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Yoshihiro Irokawa, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora