Patents by Inventor Naoto Hirosaki
Naoto Hirosaki 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: 20250113673Abstract: The present invention relates to a light-emitting device having at least one or more light emission colors having a specific correlated color temperature, which includes a light-emitting element including a first luminescent material and a second luminescent material, in which the second luminescent material contains at least one or more phosphors and one or more other phosphors each having an emission peak in a different wavelength region; in at least one of the light emission colors having the specific correlated color temperature, when an emission intensity at a wavelength ?1 where an emission intensity of an emission spectrum is maximum at 600 nm or more and 700 nm or less is A, and an emission intensity at 700 nm is C, C/A is 0.25 or less; and the one or more other phosphors include at least a phosphor containing a crystal phase having a specified composition.Type: ApplicationFiled: December 6, 2024Publication date: April 3, 2025Applicants: Mitsubishi Chemical Corporation, National Institute for Materials ScienceInventors: Yuhei Inata, Tomoyuki Kurushima, Naoto Hirosaki
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Publication number: 20250107316Abstract: The present invention relates to a light-emitting device including a first luminescent material and a second luminescent material which emits visible light by irradiation with light from the first luminescent material, in which the second luminescent material contains at least a red phosphor which satisfies the following (A) and (B): (A) An emission spectrum has at least one emission peak having a full width at half maximum (FWHM) of 20 nm or more and 65 nm or less, and (B) Chromaticity coordinates of a light emission color are present between two straight lines represented by the following equation (a) and equation (b) based on coordinates represented by (x, y) in a CIE 1931 chromaticity coordinate system: (a) y=0.992?x, (b) y=1.000?x, and 0.290?y?0.350, an illumination device, an image display device, and an indicator lamp for a vehicle.Type: ApplicationFiled: December 6, 2024Publication date: March 27, 2025Applicants: Mitsubishi Chemical Corporation, National Institute For Materials ScienceInventors: Yuhei Inata, Tomoyuki Kurushima, Naoto Hirosaki
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Patent number: 12180402Abstract: Provided are a new phosphor having emission characteristics different from the conventional nitride or oxynitride phosphor, a manufacturing method, and a light-emitting device. In an embodiment, the phosphor may include inorganic substance having crystal represented by A26(D, E)51X86 including at least A, D, X (A is at least one kind of element selected from Mg, Ca, Sr, and Ba; and D is Si, and X is at least one kind of element selected from O, N, and F); and further includes, if necessary, E (E is at least one kind of element selected from B, Al, Ga, and In) wherein the crystal further includes M (M is at least one kind of element selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb). Upon irradiation of excitation source, the maximum value of emission peak in a wavelength range from 630 nm to 850 nm may occur.Type: GrantFiled: March 31, 2020Date of Patent: December 31, 2024Assignee: National Institute for Materials ScienceInventors: Naoto Hirosaki, Takashi Takeda, Shiro Funahashi
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Publication number: 20240384167Abstract: A phosphor includes a crystal phase having a composition represented by RexMAaMBbMCcDdXe, in which MA includes at least one of Ca, Sr, Ba, Na, K, Y, Gd, or La, MB includes at least one of Li, Mg, or Zn, MC includes at least one of Al, Si, Ga, In, or Sc, D is N (nitrogen) and/or O (oxygen), X includes at least one of F, Cl, Br, or I, Re includes at least one of Eu, Ce, Pr, Tb, or Dy, and a, b, c, d, e, and x satisfy the specific expressions, respectively. In the phosphor, when a content of B (boron) is designated as b (mass ppm), a value of Log10(b) is 3.5 or less.Type: ApplicationFiled: July 29, 2024Publication date: November 21, 2024Applicants: Mitsubishi Chemical Corporation, National Institute for Materials ScienceInventors: Kyota Ueda, Tomoyuki Kurushima, Atsushi Ooishi, Naoto Hirosaki
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Publication number: 20240384166Abstract: A phosphor contains a crystal phase having a composition represented by RexMAaMBbMCcDdXe, and an element Z, in which a content of the element Z is 1,000 mass ppm or less, and the element Z includes at least one of Mo, W, Nb, Ta, Ni, Pt, or Ir. Regarding the composition, MA includes at least one of Ca, Sr, Ba, Na, K, Y, Gd, or La, MB includes at least one of Li, Mg, or Zn, MC includes at least one of Al, Si, Ga, In, or Sc, D is N (nitrogen) and/or O (oxygen), X includes at least one of F, Cl, Br, or I, and Re includes at least one of Eu, Ce, Pr, Tb, or Dy, and a, b, c, d, e, and x satisfy the specific expressions, respectively.Type: ApplicationFiled: July 29, 2024Publication date: November 21, 2024Applicants: Mitsubishi Chemical Corporation, National Institute for Materials ScienceInventors: Kyota Ueda, Tomoyuki Kurushima, Atsushi Ooishi, Naoto Hirosaki
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Publication number: 20240258468Abstract: A phosphor which comprises a crystal phase that has a composition represented by the following formula [1]; and a light emitting device which is provided with this phosphor. (MA includes one or more elements selected from the group consisting of Ca, Ba, Na, K, Y, Gd, and La, MB includes one or more elements selected from the group consisting of Li, Mg, and Zn, MC includes one or more elements selected from the group consisting of Al, Si, Ga, In, and Sc, X includes one or more elements selected from the group consisting of F, Cl, Br, and I, Re includes one or more elements selected from the group consisting of Eu, Ce, Pr, Tb, and Dy, and a, b, c, d, e, f, x, and y respectively satisfy the following expressions. 0.8 ? a ? 1.2 1.4 ? b ? 2.6 1.4 ? c ? 2.6 1.1 ? d ? 2.9 1.1 ? e ? 2.9 0. ? f ? 0.1 0. < x ? 0.2 0. < y ? 0 .Type: ApplicationFiled: April 4, 2024Publication date: August 1, 2024Applicants: MITSUBISHI CHEMICAL CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Kyota UEDA, Yuhei INATA, Naoto HIROSAKI
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Publication number: 20240240081Abstract: Provided are a phosphor emitting light having a wavelength of 600 nm or more in the red-to-nearinfrared range when irradiated with visible light or ultraviolet light; a method for producing same; a light emitting element using same; and a light emitting device using same. The phosphor includes an inorganic compound including A element, M element, D element, E element (A is at least one element selected from the group of Mg, Ca, Sr and Ba; M is at least one element selected from the group of Mn, Eu, Ce, Nd, Tb, Dy, Ho, Er, Tm and Yb; D is Si and/or Al; and E is O and/or N) and, if necessary, G element (G is Li), and represented by (A, M)aDdEeGg, (atomic fraction parameters a, d, e and g satisfy 2.4?a?4.8, 17.4?d?22.2, 26.2?e?28.6 and 0?g?3).Type: ApplicationFiled: March 30, 2022Publication date: July 18, 2024Applicant: National Institute for Materials ScienceInventors: Takayuki Nakanishi, Naoto Hirosaki, Takashi Takeda, Shiro Funahashi
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Publication number: 20240117248Abstract: A phosphor having a favorable emission peak wavelength, narrow full width at half maximum, and/or high emission intensity is provided. Additionally, a light-emitting device, an illumination device, an image display device, and/or an indicator lamp for a vehicle having favorable color rendering, color reproducibility and/or favorable conversion efficiency are provided. The present invention relates to a phosphor including a crystal phase having a composition represented by a specific formula, and having a minimum reflectance of 20% or more in a specific wavelength region, in which the specific wavelength region is from the emission peak wavelength of the phosphor to 800 nm, and a light-emitting device comprising the phosphor.Type: ApplicationFiled: December 4, 2023Publication date: April 11, 2024Applicants: Mitsubishi Chemical Corporation, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Tomoyuki KURUSHIMA, Yuhei Inata, Naoto Hirosaki
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Publication number: 20240101898Abstract: A phosphor having a favorable emission peak wavelength, narrow full width at half maximum, and/or high emission intensity is provided. Additionally, a light-emitting device, an illumination device, an image display device, and/or an indicator lamp for a vehicle having favorable color rendering, color reproducibility and/or favorable conversion efficiency are provided. The present invention relates to a phosphor including a crystal phase having a composition represented by a specific formula, and when, in a powder X-ray diffraction spectrum of the phosphor, the intensity of a peak that appears in a region where 2?=38-39° is designated as Ix and the intensity of a peak that appears in a region where 2?=37-38° is designated as Iy, the relative intensity Ix/Iy of Ix to Iy is 0.140 or less, and a light-emitting device comprising the phosphor.Type: ApplicationFiled: December 4, 2023Publication date: March 28, 2024Applicants: Mitsubishi Chemical Corporation, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Tomoyuki Kurushima, Yuhei Inata, Naoto Hirosaki
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Patent number: 11898080Abstract: Provided is a phosphor which emits near-infrared light upon irradiation of visible light or ultraviolet light. A phosphor in an embodiment of the present invention includes an inorganic substance which contains at least an Eu element, an M[3] element (M[3] is at least one selected from the group consisting of Al, Y, La and Gd.), a Si element and nitrogen element, and also contains, if necessary, at least one element selected from the group consisting of M[1] element (M[1] is Li element.), an M[2] element (M[2] is at least one element selected from the group consisting of Mg, Ca, Ba and Sr.) and an oxygen element, while the phosphor has a maximum value of an emission peak at a wavelength in the range of 760 nm or more and 850 nm and less upon irradiation by an excitation source.Type: GrantFiled: March 16, 2020Date of Patent: February 13, 2024Assignee: National Institute for Materials ScienceInventor: Naoto Hirosaki
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Patent number: 11891555Abstract: A phosphor having a favorable emission peak wavelength, narrow full width at half maximum, and/or high emission intensity is provided. Additionally, a light-emitting device, an illumination device, an image display device, and/or an indicator lamp for a vehicle having favorable color rendering, color reproducibility and/or favorable conversion efficiency are provided. The present invention relates to a phosphor including a crystal phase having a composition represented by a specific formula, and having a minimum reflectance of 20% or more in a specific wavelength region, in which the specific wavelength region is from the emission peak wavelength of the phosphor to 800 nm, and a light-emitting device comprising the phosphor.Type: GrantFiled: March 30, 2023Date of Patent: February 6, 2024Assignees: Mitsubishi Chemical Corporation, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Tomoyuki Kurushima, Yuhei Inata, Naoto Hirosaki
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Patent number: 11891554Abstract: A phosphor having a favorable emission peak wavelength, narrow full width at half maximum, and/or high emission intensity is provided. Additionally, a light-emitting device, an illumination device, an image display device, and/or an indicator lamp for a vehicle having favorable color rendering, color reproducibility and/or favorable conversion efficiency are provided. The present invention relates to a phosphor including a crystal phase having a composition represented by a specific formula, and having a minimum reflectance of 20% or more in a specific wavelength region, in which the specific wavelength region is from the emission peak wavelength of the phosphor to 800 nm, and a light-emitting device comprising the phosphor.Type: GrantFiled: March 29, 2023Date of Patent: February 6, 2024Assignees: Mitsubishi Chemical Corporation, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Tomoyuki Kurushima, Yuhei Inata, Naoto Hirosaki
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Patent number: 11884857Abstract: A phosphor having a favorable emission peak wavelength, narrow full width at half maximum, and/or high emission intensity is provided. Additionally, a light-emitting device, an illumination device, an image display device, and/or an indicator lamp for a vehicle having favorable color rendering, color reproducibility and/or favorable conversion efficiency are provided. The present invention relates to a phosphor including a crystal phase having a composition represented by a specific formula, and when, in a powder X-ray diffraction spectrum of the phosphor, the intensity of a peak that appears in a region where 2?=38-39° is designated as Ix and the intensity of a peak that appears in a region where 2?=37-38° is designated as Iy, the relative intensity Ix/Iy of Ix to Iy is 0.140 or less, and a light-emitting device comprising the phosphor.Type: GrantFiled: March 30, 2023Date of Patent: January 30, 2024Assignees: Mitsubishi Chemical Corporation, National Institute for Materials ScienceInventors: Tomoyuki Kurushima, Yuhei Inata, Naoto Hirosaki
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Patent number: 11884856Abstract: A phosphor having a favorable emission peak wavelength, narrow full width at half maximum, and/or high emission intensity is provided. Additionally, a light-emitting device, an illumination device, an image display device, and/or an indicator lamp for a vehicle having favorable color rendering, color reproducibility and/or favorable conversion efficiency are provided. The present invention relates to a phosphor including a crystal phase having a composition represented by a specific formula, and when, in a powder X-ray diffraction spectrum of the phosphor, the intensity of a peak that appears in a region where 2?=38-39° is designated as Ix and the intensity of a peak that appears in a region where 2?=37-38° is designated as Iy, the relative intensity Ix/Iy of Ix to Iy is 0.140 or less, and a light-emitting device comprising the phosphor.Type: GrantFiled: March 30, 2023Date of Patent: January 30, 2024Assignees: Mitsubishi Chemical Corporation, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Tomoyuki Kurushima, Yuhei Inata, Naoto Hirosaki
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Publication number: 20230287267Abstract: A phosphor having a favorable emission peak wavelength, narrow full width at half maximum, and/or high emission intensity is provided. Additionally, a light-emitting device, an illumination device, an image display device, and/or an indicator lamp for a vehicle having favorable color rendering, color reproducibility and/or favorable conversion efficiency are provided. The present invention relates to a phosphor including a crystal phase having a composition represented by a specific formula, and having a minimum reflectance of 20% or more in a specific wavelength region, in which the specific wavelength region is from the emission peak wavelength of the phosphor to 800 nm, and a light-emitting device comprising the phosphor.Type: ApplicationFiled: March 29, 2023Publication date: September 14, 2023Applicants: Mitsubishi Chemical Corporation, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Tomoyuki KURUSHIMA, Yuhei Inata, Naoto Hirosaki
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Publication number: 20230250334Abstract: A phosphor having a favorable emission peak wavelength, narrow full width at half maximum, and/or high emission intensity is provided. Additionally, a light-emitting device, an illumination device, an image display device, and/or an indicator lamp for a vehicle having favorable color rendering, color reproducibility and/or favorable conversion efficiency are provided. The present invention relates to a phosphor including a crystal phase having a composition represented by a specific formula, and having a minimum reflectance of 20% or more in a specific wavelength region, in which the specific wavelength region is from the emission peak wavelength of the phosphor to 800 nm, and a light-emitting device comprising the phosphor.Type: ApplicationFiled: March 30, 2023Publication date: August 10, 2023Applicants: Mitsubishi Chemical Corporation, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Tomoyuki KURUSHIMA, Yuhei INATA, Naoto HIROSAKI
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Publication number: 20230242813Abstract: A phosphor having a favorable emission peak wavelength, narrow full width at half maximum, and/or high emission intensity is provided. Additionally, a light-emitting device, an illumination device, an image display device, and/or an indicator lamp for a vehicle having favorable color rendering, color reproducibility and/or favorable conversion efficiency are provided. The present invention relates to a phosphor including a crystal phase having a composition represented by a specific formula, and when, in a powder X-ray diffraction spectrum of the phosphor, the intensity of a peak that appears in a region where 2?=38-39° is designated as Ix and the intensity of a peak that appears in a region where 2?=37-38° is designated as Iy, the relative intensity Ix/Iy of Ix to Iy is 0.140 or less, and a light-emitting device comprising the phosphor.Type: ApplicationFiled: March 30, 2023Publication date: August 3, 2023Applicants: Mitsubishi Chemical Corporation, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Tomoyuki KURUSHIMA, Yuhei Inata, Naoto Hirosaki
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Publication number: 20230235221Abstract: A phosphor having a favorable emission peak wavelength, narrow full width at half maximum, and/or high emission intensity is provided. Additionally, a light-emitting device, an illumination device, an image display device, and/or an indicator lamp for a vehicle having favorable color rendering, color reproducibility and/or favorable conversion efficiency are provided. The present invention relates to a phosphor including a crystal phase having a composition represented by a specific formula, and when, in a powder X-ray diffraction spectrum of the phosphor, the intensity of a peak that appears in a region where 2?=38-39° is designated as Ix and the intensity of a peak that appears in a region where 2?=37-38° is designated as Iy, the relative intensity Ix/Iy of Ix to Iy is 0.140 or less, and a light-emitting device comprising the phosphor.Type: ApplicationFiled: March 30, 2023Publication date: July 27, 2023Applicants: Mitsubishi Chemical Corporation, National Institute for Materials ScienceInventors: Tomoyuki KURUSHIMA, Yuhei Inata, Naoto Hirosaki
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Patent number: 11697765Abstract: Phosphors include a CaAlSiN3 family crystal phase, wherein the CaAlSiN3 family crystal phase comprises at least one element selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb.Type: GrantFiled: June 29, 2021Date of Patent: July 11, 2023Assignees: MITSUBISHI CHEMICAL CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCE, NICHIA CORPORATION, CITIZEN ELECTRONICS CO., LTD.Inventors: Naoto Hirosaki, Kyota Ueda, Hajime Yamamoto
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Patent number: 11661549Abstract: A phosphor having a favorable emission peak wavelength, narrow full width at half maximum, and/or high emission intensity is provided. Additionally, a light-emitting device, an illumination device, an image display device, and/or an indicator lamp for a vehicle having favorable color rendering, color reproducibility and/or favorable conversion efficiency are provided. The present invention relates to a phosphor including a crystal phase having a composition represented by a specific formula, and when, in a powder X-ray diffraction spectrum of the phosphor, the intensity of a peak that appears in a region where 2?=38-39° is designated as Ix and the intensity of a peak that appears in a region where 2?=37-38° is designated as Iy, the relative intensity Ix/Iy of Ix to Iy is 0.140 or less, and a light-emitting device comprising the phosphor.Type: GrantFiled: September 13, 2022Date of Patent: May 30, 2023Assignees: Mitsubishi Chemical Corporation, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Tomoyuki Kurushima, Yuhei Inata, Naoto Hirosaki