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公开(公告)号：US11990571B2
公开(公告)日：2024-05-21
申请号：US17929870
申请日：2022-09-06
申请人： NICHIA CORPORATION
发明人： Makiko Iwasa , Kazushige Fujio
CPC分类号： H01L33/504 , A61L2/084 , H01L33/507 , H01L33/56 , H01L33/60 , A61L2202/11 , H01L33/32 , H01L33/486 , H01L33/62
摘要： A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm to 420 nm and a fluorescent member including at least one fluorescent material that is excited by light from the light emitting element for light emission, wherein a mixture of light from the light emitting element and light from the fluorescent material has a correlated color temperature in a range of 2000 K to 7500 K as measured according to JIS Z8725, and the light emitting device has a spectral distribution in which, when the integral value over a wavelength range of 380 nm to 780 nm is normalized to 100%, the proportion of an integral value over a wavelength range of 380 nm to 420 nm is 15% or more, and the ratio a as defined by the expression (1) is 0.9 or more and 1.6 or less.
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公开(公告)号：US11489094B2
公开(公告)日：2022-11-01
申请号：US17031403
申请日：2020-09-24
申请人： NICHIA CORPORATION
发明人： Makiko Iwasa , Yuji Sato , Miyuki Kurata
摘要： A light emitting device includes: a light emitting element having a light emission peak wavelength in a range of 380 nm or more and 485 nm or less; a wavelength conversion member including a fluorescent material layer disposed on a light emission side of the light emitting element and containing a fluorescent material having a reflectance to light having a wavelength of 450 nm of 10% or less and a light emission peak wavelength in a range of 610 nm or more and 780 nm or less, and a dielectric multilayer film disposed on a light emission side of the fluorescent material layer.
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公开(公告)号：US11502226B2
公开(公告)日：2022-11-15
申请号：US16983470
申请日：2020-08-03
申请人： NICHIA CORPORATION
发明人： Makiko Iwasa , Kazushige Fujio
摘要： A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm to 420 nm and a fluorescent member including at least one fluorescent material that is excited by light from the light emitting element for light emission, wherein a mixture of light from the light emitting element and light from the fluorescent material has a correlated color temperature in a range of 2000 K to 7500 K as measured according to JIS Z8725, and the light emitting device has a spectral distribution in which, when the integral value over a wavelength range of 380 nm to 780 nm is normalized to 100%, the proportion of an integral value over a wavelength range of 380 nm to 420 nm is 15% or more, and the ratio a as defined by the expression (1) is 0.9 or more and 1.6 or less.
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公开(公告)号：US11002427B2
公开(公告)日：2021-05-11
申请号：US16831191
申请日：2020-03-26
申请人： NICHIA CORPORATION
发明人： Makiko Iwasa , Yuji Sato , Hiroki Fukuta
IPC分类号： F21V9/30 , H01L33/50 , F21Y115/10
摘要： A light emitting device has a covering member. The covering member includes light reflecting material and a second fluorescent material, and a dominant wavelength of an emission spectrum of the second fluorescent material differs from a dominant wavelength of an emission spectrum of the light emitting device by 30 nm or less. The light emitting device emits light with chromaticity that is within a four-sided region on a CIE 1931 chromaticity diagram, where chromaticity coordinates (x, y) are (0.645, 0.335) at a first point, (0.665, 0.335) at a second point, (0.735, 0.265) at a third point, (0.721, 0.259) at a fourth point, and a first line joins the first and second points, a second line joins the second and third points, a third line joins the third and fourth points, and a fourth line joins the fourth and first points to define the four-sided region of the chromaticity diagram.
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公开(公告)号：US11677050B2
公开(公告)日：2023-06-13
申请号：US17303376
申请日：2021-05-27
申请人： NICHIA CORPORATION
发明人： Makiko Iwasa , Kazuya Nishimata , Atsushi Yoshinari , Shoji Hosokawa , Masato Okawa , Yasuaki Mashima
CPC分类号： H01L33/504 , C09K11/77212 , C09K11/77348 , F21K9/64 , F21Y2115/10 , H01L33/62 , H01L51/502
摘要： A light emitting device includes a light emitting element having a dominant wavelength in a range of 400 nm or more and 500 nm or less, and a wavelength conversion member that is arranged on a light emitting side of the light emitting element and includes a rare earth aluminate fluorescent material having a composition represented by the following formula (I), wherein the light emitting device emits light having a dominant wavelength in a range of 475 nm or more and 500 nm or less, and wherein the light emitting device emits light having an S/P ratio of 6.5 or less derived from the formula (1), which is the ratio of a luminous flux in scotopic vision relative to a luminous flux in photopic vision:
(Lu1-p-nLnpCen)3(Al1-mGam)5kO12 (I)
wherein in the formula (I), Ln represents at least one rare earth element selected from the group consisting of Y, La, Gd, and Tb, and the parameters k, m, n, and p satisfy 0.95≤k≤1.05, 0.05≤m≤0.70, 0.002≤n≤0.050, and 0≤p≤0.30, respectively.-
公开(公告)号：US11313536B2
公开(公告)日：2022-04-26
申请号：US17228466
申请日：2021-04-12
申请人： NICHIA CORPORATION
发明人： Makiko Iwasa , Yuji Sato , Hiroki Fukuta
IPC分类号： F21V9/30 , H01L33/50 , F21Y115/10
摘要： A light emitting device includes: a light emitting element having a dominant wavelength in a range greater than or equal to 380 nm and less than or equal to 470 nm; a wavelength conversion member that is disposed on the light emitting element and includes: a translucent member, and a first fluorescent material layer interposed between the light emitting element and the translucent material, the first fluorescent material layer comprising a resin that contains a first fluorescent material, and the first fluorescent material comprising at least one compound selected from (Ca, Sr)AlSiN3: Eu and (Ca, Sr, Ba)2Si5N8: Eu; and a covering member that covers sides of the wavelength conversion member and surrounds the light emitting element, the covering member comprising light reflecting material and a second fluorescent material, and the second fluorescent material comprising at least one compound selected from (Ca, Sr)AlSiN3: Eu and (Ca, Sr, Ba)2Si5N8: Eu.
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公开(公告)号：US10770628B2
公开(公告)日：2020-09-08
申请号：US16426918
申请日：2019-05-30
申请人： NICHIA CORPORATION
发明人： Makiko Iwasa , Kazushige Fujio
摘要： A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm to 420 nm and a fluorescent member including at least one fluorescent material that is excited by light from the light emitting element for light emission, wherein a mixture of light from the light emitting element and light from the fluorescent material has a correlated color temperature in a range of 2000 K to 7500 K as measured according to JIS Z8725, and the light emitting device has a spectral distribution in which, when the integral value over a wavelength range of 380 nm to 780 nm is normalized to 100%, the proportion of an integral value over a wavelength range of 380 nm to 420 nm is 15% or more, and the ratio a as defined by the expression (1) is 0.9 or more and 1.6 or less.
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