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公开(公告)号：US10243113B2
公开(公告)日：2019-03-26
申请号：US15795444
申请日：2017-10-27
申请人： NICHIA CORPORATION
摘要： Provided is a light emitting device which includes a light emitting element having a peak emission wavelength in a range of 400 nm to 500 nm, and a fluorescent member containing a fluorescent material having a peak emission wavelength in a range of 630 nm to 670 nm, and a composition represented by the formula. CasSrtEuuSivAlwNx. In the formula, s, t, u, v, w, and x satisfy 0.25≤s≤0.5, 0.4≤t≤0.75, 0.01≤u≤0.04, 0.8≤s+t+u≤1.1, 0.8≤v≤1.2, 0.8≤w≤1.2, 1.8≤v+w≤2.2, and 2.5≤x≤3.2. The light emitting device emits light having an x value of CIE 1931 chromaticity coordinates of 0.640 or more.
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公开(公告)号：US09735323B2
公开(公告)日：2017-08-15
申请号：US15196964
申请日：2016-06-29
申请人： NICHIA CORPORATION
发明人： Kenji Asai , Hiroyuki Watanabe , Shoji Hosokawa
CPC分类号： H01L33/504 , C09K11/00 , C09K11/7734 , C09K11/7774 , H01L2224/48091 , H01L2224/48247 , H01L2224/48257 , H01L2224/73265 , H01L2924/181 , H05B33/14 , H01L2924/00014 , H01L2924/00012
摘要： A light emitting device includes a light emitting element of a peak emission wavelength in a range of 430 nm to 470 nm and a fluorescent member. The fluorescent member includes a first phosphor including a silicate having a composition that contains at least one element selected from the group consisting of Ca, Sr, and Ba, at least one element selected from the group consisting of Cl, F, and Br, and Mg and Eu, a second phosphor including an aluminate that has a composition containing Lu and Ce, and a third phosphor having emission spectrum with a half bandwidth of 86 nm or less and including a silicon nitride that has a composition containing at least one of Sr or Ca, and containing Al and Eu.
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公开(公告)号：US11867380B2
公开(公告)日：2024-01-09
申请号：US17443141
申请日：2021-07-21
申请人： NICHIA CORPORATION
发明人： Shigeki Yoshida , Hiroyuki Watanabe , Eri Matsuka
IPC分类号： F21V9/30 , C09K11/77 , F21Y115/30
CPC分类号： F21V9/30 , C09K11/7774 , C09K11/77747 , F21Y2115/30
摘要： A wavelength conversion member includes a support and a wavelength conversion layer including a first phosphor having a composition represented by Formula (1) and having an emission peak wavelength in a range from 550 nm to 620 nm, and a second phosphor having a different emission peak wavelength and/or a full width at half maximum from the first phosphor. An amount of the first phosphor in the wavelength conversion layer is in a range from 20 mass % to 80 mass % relative to a total amount of the phosphors In Formula (1), M1 represents at least one of rare earth elements other than La and Ce, a total molar content percentage of Y, Gd, and Lu in M1 is 90% or more, and p, q, r, and s satisfy 2.7≤(p+q+r)≤3.3, 0≤r≤1.2, 10≤s≤12, and 0
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公开(公告)号：US11692135B2
公开(公告)日：2023-07-04
申请号：US17806442
申请日：2022-06-10
申请人： NICHIA CORPORATION
CPC分类号： C09K11/77348 , B22F3/1017 , C09K11/7731 , C09K11/7739 , C09K11/77346 , C09K11/77347
摘要： 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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公开(公告)号：US11597879B2
公开(公告)日：2023-03-07
申请号：US17449340
申请日：2021-09-29
申请人： NICHIA CORPORATION
发明人： Shigeki Yoshida , Hiroyuki Watanabe , Eri Matsuka
摘要： The wavelength converter includes a support, and a wavelength conversion layer disposed on the support. The wavelength conversion layer contains a fluorescent layer containing a fluorescent material with a composition represented by formula (1) below, and having a thickness of from 5 μm to 155 μm. A ratio of a sum of cross-sectional areas of particles of the fluorescent material in a cross-section of the wavelength conversion layer orthogonal to a disposed surface of the wavelength conversion layer that is disposed on the support and including a full width of the wavelength conversion layer to a cross-sectional area of the cross-section of the wavelength conversion layer is from 5% to 40%. In the formula (1), M1 is at least one selected from the rare earth elements other than La and Ce; a total amount of yttrium (Y), gadolinium (Gd), and lutetium (Lu) by mole with respect to a total amount of M1 by mole is 90% or more; and p, q, r, and s satisfy 2.7≤p+q+r≤3.3, 0≤r≤1.2, 10≤s≤12, and 0
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公开(公告)号：US10947451B2
公开(公告)日：2021-03-16
申请号：US16779642
申请日：2020-02-02
申请人： NICHIA CORPORATION
发明人： Hiroyuki Watanabe , Shoji Hosokawa
摘要： Provided is a method of producing a nitride fluorescent material containing silicon nitride particles containing Eu, at least one alkaline earth metal selected from the group consisting of Mg, Ca, Sr, and Ba, Al, and fluorine in a composition of the silicon nitride particles. The method includes heat treating a raw material mixture containing an Eu source, a source of the alkaline earth metal, an Al source, an Si source, and an alkaline earth metal fluoride containing at least one selected from the group consisting of Mg, Ca, Sr, and Ba, wherein a molar content ratio of fluorine atom to Al is from 0.02 to 0.3.
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公开(公告)号：US10662375B2
公开(公告)日：2020-05-26
申请号：US15916938
申请日：2018-03-09
申请人： NICHIA CORPORATION
摘要： A method for producing a nitride fluorescent material having high emission luminance can be provided. The method includes heat-treating a raw material mixture containing silicon nitride, silicon, an aluminium compound, a calcium compound, and a europium compound.
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公开(公告)号：US11773323B2
公开(公告)日：2023-10-03
申请号：US18154147
申请日：2023-01-13
申请人： NICHIA CORPORATION
CPC分类号： C09K11/77747 , G03B21/204
摘要： Provided is a fluorescent material with high brightness. The fluorescent material includes a nitride fluorescent material comprising La, Ce, Si, and N; and a first phosphorus compound disposed on a surface of the nitride fluorescent material. The first phosphorus compound includes at least one selected from the group consisting of lanthanum phosphate, lanthanum hydrogen phosphate, and hydrates thereof. A content of phosphorus atoms in the fluorescent material is 0.07% by mass or higher and 0.8% by mass or lower.
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公开(公告)号：US10927298B2
公开(公告)日：2021-02-23
申请号：US16854507
申请日：2020-04-21
申请人： NICHIA CORPORATION
摘要： A method for producing a nitride fluorescent material having high emission luminance can be provided. The method includes heat-treating a raw material mixture containing silicon nitride, silicon, an aluminium compound, a calcium compound, and a europium compound.
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公开(公告)号：US20220026046A1
公开(公告)日：2022-01-27
申请号：US17443141
申请日：2021-07-21
申请人： NICHIA CORPORATION
发明人： Shigeki Yoshida , Hiroyuki Watanabe , Eri Matsuka
IPC分类号： F21V9/30
摘要： A wavelength conversion member includes a support and a wavelength conversion layer including a first phosphor having a composition represented by Formula (1) and having an emission peak wavelength in a range from 550 nm to 620 nm, and a second phosphor having a different emission peak wavelength and/or a full width at half maximum from the first phosphor. An amount of the first phosphor in the wavelength conversion layer is in a range from 20 mass % to 80 mass % relative to a total amount of the phosphors In Formula (1), M1 represents at least one of rare earth elements other than La and Ce, a total molar content percentage of Y, Gd, and Lu in M1 is 90% or more, and p, q, r, and s satisfy 2.7≤(p+q+r)≤3.3, 0≤r≤1.2, 10≤s≤12, and 0
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