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41.发明申请公开(公告)号：US20170275531A1
公开(公告)日：2017-09-28
申请号：US15459572
申请日：2017-03-15
Applicant: NICHIA CORPORATION
Inventor： Tadayoshi YANAGIHARA , Kazuya NISHIMATA , Shoji HOSOKAWA
CPC classification number: C09K11/7734 , H01L33/486 , H01L33/504 , H01L2224/48091 , H01L2224/48247 , H01L2224/48257 , H01L2224/73265 , H01L2924/181 , H01L2924/00014 , H01L2924/00012
Abstract: A method of producing a fluorescent material that is capable of providing a light emitting device having excellent durability, a fluorescent material, and a light emitting device are provided. The method of producing the fluorescent material includes: preparing a calcined product having a chlorosilicate composition containing at least one element selected from the group consisting of Ca, Sr, and Ba, at least one element selected from the group consisting of Mg and Zn, at least one element selected from the group consisting of Eu, Ce, Tb, and Mn, Si, O, and Cl; and bringing the calcined product in contact with a fluorine-containing substance and heat-treating the calcined product in an inert gas atmosphere at a temperature in a range of 200° C. or more and 450° C. or less.
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公开(公告)号：US20170222099A1
公开(公告)日：2017-08-03
申请号：US15485377
申请日：2017-04-12
Applicant: NICHIA CORPORATION
Inventor： Shoji HOSOKAWA , Masafumi SAKAMOTO , Tomokazu YOSHIDA
CPC classification number: H01L33/504 , C09K11/0883 , C09K11/665 , C09K11/7707 , C09K11/7731 , C09K11/7734 , H01L33/502 , H01L2224/48247 , H01L2224/48257 , H01L2224/73265 , Y10T428/2982
Abstract: A red phosphor including the composition represented by the following general formula. (x-a)MgO·(a/2)Sc2O3·yMgF2·cCaF2·(1-b)GeO2·(b/2)Mt2O3:zMn4+ where x, y, z, a, b, and c satisfy 2.0≦x≦4.0, 0
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公开(公告)号：US20160126428A1
公开(公告)日：2016-05-05
申请号：US14926476
申请日：2015-10-29
Applicant: NICHIA CORPORATION
Inventor： Shoji HOSOKAWA , Kimihiro MIYAMOTO , Daisuke IWAKURA
CPC classification number: H01L33/502 , H01L33/54 , H01L2224/48247 , H01L2224/48257 , H01L2224/73265 , H01L2224/8592 , H01L2933/0091
Abstract: A light emitting device is provided which includes a light emitting element, a phosphor, and a sealing member. The light emitting element has a light emission peak wavelength in the range not shorter than 400 nm and not longer than 460 nm. The phosphor can be excited by light from the light emitting element, and emit luminescent radiation with a light emission peak wavelength in the range in not shorter than 600 nm and not longer than 700 nm. The sealing member includes a pigment for absorbing a part of the light from the light emitting element. X of the light emission chromaticity of the light emitting device falls within the range of x≧0.600 in the chromaticity coordinates in the CIE 1931 color space chromaticity diagram.
Abstract translation: 提供一种发光器件，其包括发光元件，荧光体和密封构件。 发光元件的发光峰值波长在不小于400nm且不大于460nm的范围内。 荧光体可以由来自发光元件的光激发，并发射发光峰值波长在不小于600nm且不大于700nm的范围内的发光辐射。 密封构件包括用于吸收来自发光元件的一部分光的颜料。 发光装置的发光色度的X在CIE1931色空间色度图中的色度坐标中落在x≥0.600的范围内。
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公开(公告)号：US20230250335A1
公开(公告)日：2023-08-10
申请号：US18304004
申请日：2023-04-20
Applicant: NICHIA CORPORATION
Inventor： Shigeyuki SUZUKI , Hiroyuki WATANABE , Shoji HOSOKAWA
CPC classification number: C09K11/77348 , C09K11/7731 , C09K11/7739 , C09K11/77346 , C09K11/77347 , B22F3/1017
Abstract: A nitride phosphor having a composition containing Eu, Si, Al, N, and a group 2 element including at least one selected from the group consisting of Mg, Ca, Sr, and Ba. In the composition, a ratio of a total molar content of the group 2 element and Eu to a molar content of Al is 0.8 or more and 1.1 or less, a molar ratio of Eu is 0.002 or more and 0.08 or less, a molar ratio of Si is 0.8 or more and 1.2 or less, and a total molar ratio of Si and Al is 1.8 or more and 2.2 or less. The nitride phosphor has a first peak in a range of 17° 2θ or more and 19° 2θ or less and a second peak in a range of 34° 2θ or more and 35.5° 2θ or less in a CuKα powder X-ray diffraction pattern.
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45.发明申请公开(公告)号：US20220106523A1
公开(公告)日：2022-04-07
申请号：US17643883
申请日：2021-12-13
Applicant: NICHIA CORPORATION
Inventor： Hirofumi OOGURI , Shoji HOSOKAWA
Abstract: Provided are a method for producing a ceramic sintered body having improved light emission intensity, a ceramic sintered body, and a light emitting device. The method for producing a ceramic sintered body comprises preparing a molded body that contains a nitride fluorescent material having a composition containing: at least one alkaline earth metal element M1 selected from the group consisting of Ba, Sr, Ca, and Mg; at least one metal element M2 selected from the group consisting of Eu, Ce, Tb, and Mn; Si; and N, wherein a total molar ratio of the alkaline earth metal element M1 and the metal element M2 in 1 mol of the composition is 2, a molar ratio of the metal element M2 is a product of 2 and a parameter y and wherein y is in a range of 0.001 or more and less than 0.5, a molar ratio of Si is 5, and a molar ratio of N is 8, and wherein the nitride fluorescent material has a crystallite size, as calculated by X-ray diffraction measurement using the Halder-Wagner method, of 550 Å or less, and calcining the molded body at a temperature in a range of 1,600° C. or more and 2,200° C. or less to obtain a sintered body.
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Patent Agency Ranking
公开(公告)号：US20210095202A1
公开(公告)日：2021-04-01
申请号：US17033576
申请日：2020-09-25
Applicant: NICHIA CORPORATION
Inventor： Kenichi AOYAGI , Takashi KAIDE , Yuya TAKAHASHI , Shoji HOSOKAWA
Abstract: Provided a method of producing a β-sialon fluorescent material having excellent emission intensity. The method includes providing a first composition containing aluminum, an oxygen atom, and a europium-containing silicon nitride, heat treating the first composition, contacting the heat-treated composition and a basic substance to obtain a second composition, and contacting the second composition resulting from contacting the heat-treated composition with the basic substance and an acidic liquid medium containing an acidic substance.
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公开(公告)号：US20200255728A1
公开(公告)日：2020-08-13
申请号：US16783630
申请日：2020-02-06
Applicant: NICHIA CORPORATION
Inventor： Hiroyuki WATANABE , Shigeyuki SUZUKI , Shoji HOSOKAWA
Abstract: A method for producing a nitride fluorescent material includes preparing fluorescent material core particles having a composition containing Sr, Ca, Eu, Al, Si, and N, in which, when a molar ratio of Al in the composition is 1, a molar ratio of Sr is in a range of 0.45 or more and 1.1 or less, a molar ratio of Ca is in a range of more than 0 and less than 0.55, a molar ratio of Eu is in a range of more than 0 and 0.033 or less, a total molar ratio of Sr, Ca, and Eu is 1.1 or less, a molar ratio of Si is in a range of 0.81 or more and 1.21 or less, and a molar ratio of N is in a range of 2.25 or more and 3.85 or less, subjecting them to a first heat treatment and a second heat treatment.
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公开(公告)号：US20200185575A1
公开(公告)日：2020-06-11
申请号：US16793018
申请日：2020-02-18
Applicant: NICHIA CORPORATION
Inventor： Kenichi AOYAGI , Takashi KAIDE , Takuya NAKABAYASHI , Tetsuya ISHIKAWA , Shoji HOSOKAWA
Abstract: A wavelength converting member comprising a first wavelength converting layer containing: a first fluorescent material having a light emission peak wavelength in a range of 620 nm or more and 660 nm or less; a second fluorescent material having a light emission peak wavelength in a range of 510 nm or more and 560 nm or less; and a resin, wherein the average particle diameter, as measured according to a Fisher Sub-Sieve Sizer method, of the first fluorescent material is in a range of 2 μm or more and 30 μm or less, wherein the second fluorescent material comprises a β-SiAlON fluorescent material, the circularity of the β-SiAlON fluorescent material is 0.7 or more, and the volume average particle diameter, as measured according to a laser diffraction scattering particle size distribution measuring method, of the β-SiAlON fluorescent material is in a range of 2 μm or more and 30 μm or less, and wherein the thickness of the first wavelength converting layer is in a range of 50 μm or more and 200 μm or less.
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公开(公告)号：US20200181489A1
公开(公告)日：2020-06-11
申请号：US16790049
申请日：2020-02-13
Applicant: NICHIA CORPORATION
Inventor： Shoji HOSOKAWA , Daiki KURAMOTO
Abstract: A method of producing a nitride fluorescent material including a step of first heat-treating a first compound containing at least one alkaline earth metal element selected from the group consisting of Ba, Sr, Ca and Mg, a second compound containing at least one element selected from the group consisting of Eu, Ce, Tb and Mn, and a Si-containing compound, in an atmosphere containing nitrogen to obtain a calcined product of raw materials, and a step of second heat-treating the calcined product of raw materials, a Ba-containing compound, a Si-containing compound, and optionally a third compound containing at least one element selected from the group consisting of Eu, Ce, Tb and Mn, and optionally a fourth compound containing at least one alkaline earth metal element selected from the group consisting of Sr, Ca and Mg, in an atmosphere containing nitrogen to obtain a nitride fluorescent material is provided, wherein the ratio of the charge-in molar amount of Ba to the total charge-in molar amount of at least one alkaline earth metal element to be contained in the calcined product of raw materials in the step of obtaining the calcined product of raw materials is smaller than the ratio of the charge-in molar amount of Ba to the total charge-in molar amount of at least one alkaline earth metal element to be contained in the nitride fluorescent material in the step of obtaining the nitride fluorescent material.
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公开(公告)号：US20200002605A1
公开(公告)日：2020-01-02
申请号：US16454917
申请日：2019-06-27
Applicant: NICHIA CORPORATION
Inventor： Motoharu MORIKAWA , Shoji HOSOKAWA
IPC: C09K11/08 , C04B35/597 , C04B35/626 , C09K11/77 , C04B35/63
Abstract: Provided is a method for producing a β-sialon fluorescent material, comprising preparing a composition containing a silicon nitride that contains aluminium, oxygen, and europium; heat-treating the composition at a temperature in a range of 1300° C. or more and 1600° C. or less to obtain a heat-treated product; subjecting the heat-treated product to a temperature-decrease of from the heat treatment temperature to 1000° C. as a first temperature-decrease step; and subjecting the heat-treated product to a temperature-decrease of from 1000° C. to 400° C. as a second temperature-decrease step. The first temperature-decrease step has a temperature-decrease rate in a range of 1.5° C./min or more and 200° C./min or less, and the second temperature-decrease step has a temperature-decrease rate in a range of 1° C./min or more and 200° C./min or less
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