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公开(公告)号：US12100927B2
公开(公告)日：2024-09-24
申请号：US17613792
申请日：2020-04-21
Inventor： Mitsuru Nitta , Takeshi Abe , Shozo Oshio
CPC classification number: H01S5/0087 , A61B1/0653 , G02B23/2469
Abstract: A light emitting device includes a light source that emits a primary light having a light energy density exceeding 0.5W/mm2, and a first phosphor that absorbs the primary light to convert the primary light into a first wavelength-converted light having a wavelength longer than that of the primary light. The first phosphor includes a compound serving as a host, the compound being a simple oxide including one kind of metal element or a composite oxide including a plurality of different kinds of the simple oxide as an end member. When an energy conversion value at a peak wavelength of the primary light is E1 electron volts and an energy conversion value at a fluorescence peak wavelength of the first wavelength-converted light is E2 electron volts, a bandgap energy of a crystal of the simple oxide is larger than a sum of the E1 electron volts and the E2 electron volts.
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公开(公告)号：US09515239B2
公开(公告)日：2016-12-06
申请号：US14618591
申请日：2015-02-10
Inventor： Yasuhisa Inada , Taku Hirasawa , Yoshitaka Nakamura , Akira Hashiya , Mitsuru Nitta , Takeyuki Yamaki
IPC: H01L33/00 , H01L33/58 , H01L33/50 , H01L27/118 , H01L31/0232 , H01L31/12
CPC classification number: H01L33/58 , H01L31/02322 , H01L31/12 , H01L31/125 , H01L33/00 , H01L33/505 , H01L2027/11853
Abstract: A light-emitting device includes a photoluminescent layer that emits light containing first light, and a light-transmissive layer located on or near the photoluminescent layer. A submicron structure is defined on at least one of the photoluminescent layer and the light-transmissive layer. The submicron structure includes at least projections or recesses. The submicron structure has spatial frequency components distributed at least from more than 0 to 2/Dint(min) as determined by two-dimensional Fourier transform of a pattern of the projections or recesses and satisfies the following relationship: 0.8Dint(min)
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公开(公告)号：US09068117B2
公开(公告)日：2015-06-30
申请号：US14553024
申请日：2014-11-25
Inventor： Osamu Inoue , Kojiro Okuyama , Mitsuru Nitta , Seigo Shiraishi
CPC classification number: C09K11/7794 , H01L33/502
Abstract: A phosphor material according to an embodiment of the present disclosure contains a major component represented by the formula A2-v-w-x-yBvLnwEuxSmyM2-zDzO8, where A is one or more elements selected from the group consisting of alkaline-earth metal elements; B is one or more elements selected from the group consisting of alkali metal elements; Ln is one or more elements selected from the group consisting of rare-earth elements other than Eu and Sm; M is one or more elements selected from the group consisting of W and Mo; D is one or more elements selected from the group consisting of Nb and Ta; and v, w, x, y, and z satisfy the inequalities 0≦v≦0.5, 0.15≦x+y≦0.7, 0≦y≦0.05, and 0
Abstract translation: 根据本公开实施方案的荧光体材料包含由式A2-v-w-x-yBvLnwEuxSmyM2-zDzO8表示的主要组分，其中A是选自碱土金属元素中的一种或多种元素; B是选自碱金属元素的一种或多种元素; Ln是选自除了Eu和Sm以外的稀土元素的一种以上的元素; M是选自W和Mo的一种或多种元素; D是选自Nb和Ta中的一种或多种元素; 并且v，w，x，y和z满足不等式0＆nlE; v＆nlE; 0.5,0.15＆nlE; x + y＆nlE; 0.7,0和nlE; y＆nlE; 0.05和0
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公开(公告)号：USRE49093E1
公开(公告)日：2022-06-07
申请号：US17152753
申请日：2021-01-19
Inventor： Nobuaki Nagao , Taku Hirasawa , Yasuhisa Inada , Mitsuru Nitta , Akira Hashiya , Yasuhiko Adachi
Abstract: A light-emitting apparatus includes; a light-emitting device including a photoluminescent layer that receives excitation light and emits light including first light having a wavelength λa in air, and a light-transmissive layer located on or near the photoluminescent layer; and an optical fiber that receives the light from the photoluminescent layer at one end of the optical fiber and emits the received light from the other end thereof. A surface structure is defined on at least one of the photoluminescent layer and the light-transmissive layer, and the surface structure has projections or recesses or both and limits a directional angle of the first light having the wavelength λa in air.
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公开(公告)号：US10714661B2
公开(公告)日：2020-07-14
申请号：US15933455
申请日：2018-03-23
Inventor： Mitsuru Nitta , Nobuaki Nagao , Yasuhisa Inada
Abstract: A light-emitting apparatus includes: a solid-state light source; and a wavelength convertor. The solid-state light source emits first light including green light with a peak wavelength in a range of 480 to 550 nm, inclusive. The wavelength convertor contains a red phosphor including Ce as a luminescent center. The red phosphor is excited by at least part of the green light to emit second light. The second light has a spectrum with a peak wavelength in a range of 600 to 700 nm, inclusive. The red phosphor contains a nitride or an oxynitride as a host material.
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Patent Agency Ranking
公开(公告)号：US10662376B2
公开(公告)日：2020-05-26
申请号：US16190495
申请日：2018-11-14
Inventor： Mitsuru Nitta , Nobuaki Nagao , Yasuhisa Inada
IPC: H01L33/50 , C09K11/77 , C09K11/08 , F21V9/30 , F21Y115/30
Abstract: A phosphor comprises a crystal phase with a chemical composition (Lu1-p-q, Cep, Mq)xβyγzO. M denotes one or more elements selected from the group consisting of Y, La, Sc, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb. β contains Si, which constitutes 90% or more by mole of β. γ contains N, which constitutes 90% or more by mole of γ. The variables x, y, z, p, and q satisfy 5.5≤x≤6.5, 10.5≤y≤11.5, 19.5≤z≤20.5, 0
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公开(公告)号：US10012780B2
公开(公告)日：2018-07-03
申请号：US15215592
申请日：2016-07-21
Inventor： Yasuhisa Inada , Taku Hirasawa , Mitsuru Nitta , Akira Hashiya , Takeyuki Yamaki
CPC classification number: G02B6/0003 , G02B6/00 , G02B6/0035 , G02B6/0036 , G02B6/0038 , G02B6/0053 , G02B6/0058 , G02B6/0076 , G02B6/0083 , G02B6/0085 , G03B21/204 , H01L33/505 , H01L33/58
Abstract: A light-emitting device includes a photoluminescent layer and a light-transmissive layer located on the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a submicron structure having at least projections or recesses arranged perpendicular to the thickness direction of the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a light emitting surface. The first light has a wavelength λa in air. A distance Dint between adjacent projections or recesses and a refractive index nwav-a of the photoluminescent layer for the first light satisfy λa/nwav-a
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公开(公告)号：US09618697B2
公开(公告)日：2017-04-11
申请号：US14621729
申请日：2015-02-13
Inventor： Yasuhisa Inada , Taku Hirasawa , Yoshitaka Nakamura , Akira Hashiya , Mitsuru Nitta , Takeyuki Yamaki
CPC classification number: G02B6/1225 , G02B6/124 , H01L2933/0083
Abstract: A light-emitting device includes a photoluminescent layer that emits light containing first light, a light-transmissive layer located on or near the photoluminescent layer, a low-refractive-index layer and a high-refractive-index layer. A submicron structure is defined on the photoluminescent layer and/or the light-transmissive layer. The low-refractive-index layer is located on or near the photoluminescent layer so that the photoluminescent layer is located between the low-refractive-index layer and light-transmissive layer. The high-refractive-index layer is located on or near the low-refractive-index layer so that the low-refractive-index layer is located between the high-refractive-index layer and the photoluminescent layer. The submicron structure includes at least projections or recesses and satisfies the following relationship: λa/nwav-a
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公开(公告)号：US09518220B2
公开(公告)日：2016-12-13
申请号：US14690363
申请日：2015-04-17
Inventor： Osamu Inoue , Kojiro Okuyama , Mitsuru Nitta , Seigo Shiraishi
CPC classification number: C09K11/7794 , F21K2/00 , H01L33/502
Abstract: A red phosphor material comprising an essential component represented by a formula of ALn1-x-yEuxSmyM2O8 as a main component, where A represents at least one selected from Li, Na, and K; Ln represents at least one selected from La and Gd; M represents at least one selected from W and Mo; and x and y are numerical values that satisfy 0.1≦x+y≦0.7 and 0.005≦y≦0.08. A light-emitting device includes an excitation light source and the red phosphor material that absorbs excitation light emitted by the excitation light source and emits red light.
Abstract translation: 一种红色荧光体材料，其包含由以下化学式表示的基本组分：ALn1-x-yEuxSmyM2O8作为主要成分，其中A表示选自Li，Na和K中的至少一种; Ln表示选自La和Gd中的至少一种; M表示选自W和Mo中的至少一种; x和y是满足0.1≤x+y≤0.7且0.005≤y≤0.08的数值。 发光装置包括激发光源和吸收由激发光源发射的激发光并发出红光的红色荧光体材料。
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公开(公告)号：US12140305B2
公开(公告)日：2024-11-12
申请号：US18598177
申请日：2024-03-07
Inventor： Mitsuru Nitta , Shozo Oshio , Takeshi Abe
IPC: F21V9/30 , A61B5/00 , A61N5/06 , A61N5/067 , A61B1/04 , A61B1/06 , F21W131/20 , F21Y115/30
Abstract: A light-emitting device includes: a light source that radiates primary light; and a first phosphor that absorbs the primary light and converts the primary light into first wavelength-converted light having a longer wavelength than the primary light, the first wavelength-converted light includes fluorescence based on electron energy transition of Cr3+, and a fluorescence spectrum of the first wavelength-converted light has a maximum fluorescence intensity value in region of a wavelength exceeding 710 nm.
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