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公开(公告)号：US10651348B2
公开(公告)日：2020-05-12
申请号：US16427243
申请日：2019-05-30
Inventor： Youshin Lee , Shozo Oshio , Tatsuya Okuno , Takeshi Abe , Masahiro Nakamura
IPC: H01J1/62 , H01L33/50 , C09K11/08 , F21S2/00 , G02B5/20 , H01S5/022 , F21V9/30 , H01L33/16 , H01L33/58
Abstract: A light emitting device 1 includes: a substrate 30; and a phosphor layer 40 composed in such a manner that a large number of phosphor particles 60 are adhered onto a flat surface 32 of the substrate 30. At least one of the phosphor particles 60 is a polyhedral phosphor particle 65 that is monodispersed, is derived from a crystal structure of garnet and has facets, and a median particle size D50 of the polyhedral phosphor particle 65 is 30 μm or more and a maximum thickness of the phosphor layer 40 or less. It is preferable that at least one of the phosphor particles 60 adhered onto the flat surface 32 of the substrate 30 is the polyhedral phosphor particle 65 that is monodispersed, is derived from the crystal structure of the garnet, and has the facets.
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公开(公告)号：US11384920B2
公开(公告)日：2022-07-12
申请号：US17045390
申请日：2019-03-18
Inventor： Tatsuya Okuno , Kazuyuki Yamae
Abstract: An illumination device includes a housing including an opening portion, a wavelength converting component which is disposed inside the housing and radiates wavelength-converted light having a different wavelength from that of a laser beam after the laser beam enters the component, an optical film which covers the opening portion and has optical properties such that the transmittance for the wavelength-converted light is 80% or more and the transmittance for the laser beam at the peak wavelength is 80% or less of the transmittance for the wavelength-converted light at the peak wavelength, and a light diffusing structure which is disposed on at least part of the inner wall of the housing and diffusely reflects the laser beam reflected at least by the optical film.
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公开(公告)号：US11371675B2
公开(公告)日：2022-06-28
申请号：US17047220
申请日：2019-04-10
Inventor： Tatsuya Okuno , Takeshi Abe , Shozo Oshio
Abstract: Alight emitting device (A) includes a laser light source (1) that emits laser light (100), a housing (2A) that includes a bottom wall (3) and a side wall, and a first wavelength converter (20) provided on the side wall, the first wavelength converter (20) containing a first phosphor. The bottom wall of the housing is irradiated with the laser light emitted from the laser light source, and the first phosphor is excited by diffused light of the laser light diffused by the bottom wall. With such a configuration, the light emitting device (A) improves color uniformity and chromaticity flexibility while increasing power density of output light.
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公开(公告)号：US10355175B2
公开(公告)日：2019-07-16
申请号：US16071906
申请日：2017-01-31
Inventor： Youshin Lee , Shozo Oshio , Tatsuya Okuno , Takeshi Abe , Masahiro Nakamura
IPC: H01J1/62 , H01L33/50 , C09K11/08 , F21S2/00 , G02B5/20 , H01S5/022 , F21V9/30 , H01L33/16 , H01L33/58
Abstract: A light emitting device 1 includes: a substrate 30; and a phosphor layer 40 composed in such a manner that a large number of phosphor particles 60 are adhered onto a flat surface 32 of the substrate 30. At least one of the phosphor particles 60 is a polyhedral phosphor particle 65 that is monodispersed, is derived from a crystal structure of garnet and has facets, and a median particle size D50 of the polyhedral phosphor particle 65 is 30 μm or more and a maximum thickness of the phosphor layer 40 or less. It is preferable that at least one of the phosphor particles 60 adhered onto the flat surface 32 of the substrate 30 is the polyhedral phosphor particle 65 that is monodispersed, is derived from the crystal structure of the garnet, and has the facets.
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Patent Agency Ranking
公开(公告)号：US09774010B2
公开(公告)日：2017-09-26
申请号：US14868390
申请日：2015-09-29
Inventor： Tatsuya Okuno
CPC classification number: H01L51/5271 , G02B6/0006 , G02B6/0008 , H01L33/44 , H01L33/46 , H01L33/483 , H01L33/486 , H01L51/5268 , H01L51/5275
Abstract: A light reflective material of the present disclosure includes a base material having light transmission property; and a porous particle located in the base material, the porous particle comprising a shell defining pores, the base material having a first refractive index, the shell having a second refractive index higher than the first refractive index. A light-emitting device of the present disclosure includes a light emitter that emits light; and a reflective layer that covers a portion of a surface of the light emitter, the reflective layer comprising a base material having light transmission property and a porous particle located in the base material, the porous particle comprising a shell defining pores, the base material having a first refractive index, the shell having a second refractive index higher than the first refractive index.
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公开(公告)号：US09640783B2
公开(公告)日：2017-05-02
申请号：US14846663
申请日：2015-09-04
Inventor： Masahito Yamana , Tetsushi Konda , Tatsuya Okuno
IPC: H01L51/52
CPC classification number: H01L51/5275 , H01L51/5268 , H01L51/5271
Abstract: A light-emitting device according to an aspect of the present disclosure includes a light transmissive first electrode layer, a light transmissive second electrode layer, an electroluminescent layer between the first electrode layer and the second electrode layer, and a reflective layer located on a side opposite to the electroluminescent layer with respect to the second electrode layer. The reflective layer includes a base material having a refractive index equal to or higher than a refractive index of the electroluminescent layer, and fillers each having a refractive index different from that of the base material.
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公开(公告)号：US11898343B2
公开(公告)日：2024-02-13
申请号：US17440989
申请日：2020-02-04
Inventor： Naoki Kurizoe , Natsuki Sato , Tatsuya Okuno , Ryosuke Sawa , Tatsuro Yoshioka
Abstract: A water-repellent member includes a matrix part including an inorganic substance including at least one of a metal oxide or a metal hydroxide, and a water-repellent resin present in a dispersed state inside the matrix part. The water-repellent member has a porosity of 20% or less in a section of the matrix part. A building member and a wet room member each include the water-repellent member.
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公开(公告)号：US11435059B2
公开(公告)日：2022-09-06
申请号：US17273194
申请日：2019-09-11
Inventor： Tatsuya Okuno
Abstract: A wavelength conversion member converts a wavelength of laser light. The wavelength conversion member includes a substrate having reflectivity with respect to the laser light, and a phosphor layer including a phosphor for converting the laser light into light having a longer wavelength than that of the laser light, the phosphor layer being on the substrate. The phosphor layer includes a plurality of concave parts, each having a depth of 50% or more and 80% or less with respect to a film thickness of the phosphor layer and an opening width of 50 μm or more, on a surface of the phosphor layer, the surface irradiated with the laser light. A distance between adjacent concave parts of the plurality of concave parts is smaller than a spot diameter of the laser light to be emitted to the surface of the phosphor layer.
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公开(公告)号：US11131914B2
公开(公告)日：2021-09-28
申请号：US16488578
申请日：2018-02-26
Inventor： Tatsuya Okuno , Masahiro Nakamura , Youshin Lee
Abstract: A wavelength conversion member includes: a substrate; a wavelength converter including phosphor particles excited by excitation light and a binder layer that fixes or adheres the adjacent phosphor particles to one another, the wavelength converter being provided on a front surface side of the substrate; and a light reflecting film that reflects fluorescent light radiated by the phosphor particles, the light reflecting film being provided on at least a part of an interface between the substrate and the wavelength converter, wherein a refractive index of the phosphor particles is larger than a refractive index of the binder layer. It is preferable that the binder layer include nanogaps which are voids with an average diameter of 300 nm or less in an inside.
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