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公开(公告)号：US10208899B2
公开(公告)日：2019-02-19
申请号：US15200099
申请日：2016-07-01
Inventor： Kazuma Mima , Yoshihisa Nagasaki , Takahiro Hamada , Takashi Ohbayashi , Yukihiko Sugio
IPC: F21V9/30 , F21K9/64 , H01S5/00 , C09K11/02 , C09K11/77 , H05B33/20 , H05B33/22 , H01L33/50 , F21Y115/30 , H01L33/46 , H01S5/323
Abstract: A light source includes a semiconductor light emitting device; and a wavelength converter. The wavelength converter includes: a substrate; a phosphor layer disposed on the substrate; and a light reflective layer disposed on the substrate so as to surround the phosphor layer. The phosphor layer includes phosphor particles and a first matrix material in which the phosphor particles are dispersed. The light reflective layer includes inorganic compound particles and a second matrix material in which the inorganic compound particles are dispersed. The inorganic compound particles have a refractive index higher than that of the first matrix material. The first matrix material has a refractive index higher than that of the phosphor particles. The phosphor particles have a refractive index higher than that of the second matrix material.
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Patent Agency Ranking
公开(公告)号：US12247149B2
公开(公告)日：2025-03-11
申请号：US17800848
申请日：2021-02-10
Inventor： Takashi Ohbayashi , Yoshihisa Nagasaki , Yuji Miyachi
Abstract: A conductive paste for an electrolytic capacitor used for connecting a cathode part and a cathode lead terminal of the electrolytic capacitor. The conductive paste includes a thermosetting resin, and conductive particles, and the conductive particles include flaky metal particles and acicular conductive particles. The content of the conductive particles in the conductive paste is, for example, 50 mass % or more and 70 mass % or less, and the mass ratio of the flaky metal particles to the total of the flaky metal particles and the acicular conductive particles is, for example, 60% or more and 80% or less.
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公开(公告)号：US11130909B2
公开(公告)日：2021-09-28
申请号：US16635456
申请日：2018-08-07
Inventor： Takahiro Hamada , Yukihiko Sugio , Takashi Ohbayashi , Yoshihisa Nagasaki
Abstract: A wavelength conversion device of the present disclosure includes a substrate, a phosphor layer that has a matrix containing zinc oxide and phosphor particles embedded in the matrix and that is supported by the substrate, a dielectric layer disposed between the substrate and the phosphor layer, and a protective layer that is disposed between the phosphor layer and the dielectric layer and that has an isoelectric point equal to or larger than 7. A main surface of the substrate includes, for example, first and second regions. The phosphor layer covers, for example, only the first region out of the first and second regions.
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公开(公告)号：US09841157B2
公开(公告)日：2017-12-12
申请号：US14726634
申请日：2015-06-01
Inventor： Nobuaki Nagao , Seigo Shiraishi , Yoshihisa Nagasaki , Takashi Ohbayashi
IPC: F21S8/10 , F21V9/16 , F21Y115/30 , F21Y115/10
CPC classification number: F21S41/285 , F21S41/14 , F21S41/141 , F21S41/16 , F21S41/19 , F21S41/30 , F21S41/32 , F21S41/321 , F21S41/36 , F21S41/365 , F21V9/30 , F21Y2115/10 , F21Y2115/30
Abstract: A lamp includes: first and second semiconductor light-emitting elements adapted to emit excitation light; a wavelength conversion element adapted to convert the excitation light into light having a peak wavelength different from that of the excitation light; and a concave mirror adapted to reflect the excitation light emitted from the semiconductor light-emitting elements to the wavelength conversion element and reflect the light from the wavelength conversion element toward an outside of the lamp. A distance y1 from an optical axis of the first semiconductor light-emitting element to an optical axis of the concave mirror satisfies (D+Dphos)/2≦y1≦4f, and a distance y2 from an optical axis of the second semiconductor light-emitting element to the optical axis of the concave mirror satisfies 4f
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公开(公告)号：US11474423B2
公开(公告)日：2022-10-18
申请号：US17414401
申请日：2019-10-04
Inventor： Takahiro Hamada , Naoyuki Tani , Takashi Ohbayashi , Yoshihisa Nagasaki
Abstract: A wavelength conversion device includes a matrix containing inorganic material, a phosphor embedded in the matrix, and filler particles embedded in the matrix and containing resin material. This wavelength conversion device prevents the phosphor from falling.
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公开(公告)号：US10794569B2
公开(公告)日：2020-10-06
申请号：US16483874
申请日：2018-02-09
Inventor： Yoshihisa Nagasaki , Takashi Ohbayashi , Takahiro Hamada , Yukihiko Sugio , Yusuke Ogihara
IPC: F21V9/30 , F21S41/176 , F21S41/16 , F21Y115/30 , H01S5/022 , G02B5/20
Abstract: A wavelength conversion member of the present disclosure includes a first matrix, phosphor particles embedded in the first matrix, and at least one selected from the group consisting of first filler particles embedded in the first matrix and surface coating layers respectively covering surfaces of the phosphor particles. The wavelength conversion member satisfies at least one relationship selected from the group consisting of |n3−n1|>|n1−n2| and |n4−n1|>|n1−n2| wherein n1 is a refractive index of the first matrix, n2 is a refractive index of the phosphor particles, n3 is a refractive index of the first filler particles, and n4 is a refractive index of the surface coating layers.
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