Nippon Electric Glass Co., Ltd.

Nichia Corporation

Tadahito Furuyama

Shunsuke Fujita

Tamio Ando

Masaaki Kadomi

Yukihiro Hayashi

Atsutomo Hama

Masaru Iwao

Takafumi Sugiyama

Yoshio Umayahara

Naoto Morizumi

Naoki Fujita

Hiroyuki Shimizu

Shotaro Fukumoto

Provided is a wavelength conversion member which is made of a phosphor powder dispersed in a glass matrix and has an excellent luminous efficiency. A wavelength conversion member is comprising: a phosphor powder dispersed in a glass matrix, wherein the glass matrix has a refractive index (nd) of 1.6 or more and a liquidus temperature of 1070° C. or below.

Wavelength conversion member and light emitting device using same

Provided are nanophosphor-attached inorganic particles that can suppress the degradation of the nanophosphor when sealed in glass, and a wavelength conversion member using the nanophosphor-attached inorganic particles. The nanophosphor-attached inorganic particleinclude: inorganic particleshaving an average particle diameter of 1 &#x3bc;m or more; and a nanophosphorattached to surfaces of the inorganic particles

Nanophosphor-attached inorganic particles and wavelength conversion member

Provided are: a wavelength conversion member capable of reducing the decrease in luminescence intensity with time and the melting of component materials when irradiated with high-power excitation light; a method for manufacturing the same; and a light-emitting device using the wavelength conversion member. A wavelength conversion memberis made of a phosphor powderand a thermally conductive fillerboth dispersed into an inorganic binder, a refractive index difference between the inorganic binderand the thermally conductive fillerbeing 0.2 or less, a volume ratio of a content of the inorganic binderto a content of the thermally conductive fillerbeing 40:60 to 5:95.

Wavelength conversion member and method for manufacturing same, and light-emitting device

Provided is a wavelength conversion member capable of suppressing excessive heating of a phosphor layer and a light emitting device using the same. The wavelength conversion memberincludes: a heat dissipation substrate; a phosphor layerprovided on the heat dissipation substrate; and a bonding material layerprovided between the heat dissipation substrateand the phosphor layer, wherein the bonding material layerincludes a thermally conductive porous bodyand a bonding materialand the thermally conductive porous bodyis impregnated with the bonding material

Wavelength conversion member and light emitting device

Provided is a wavelength conversion member that can increase the light extraction efficiency to improve the luminous efficiency. A wavelength conversion memberincludes: a phosphor layercontaining a glass matrix and inorganic phosphor powder dispersed in the glass matrix; a glass layerdisposed on a surface of the phosphor layerand having a refractive index equal to or smaller than a refractive index of the inorganic phosphor powder; and a microscopically uneven layerdisposed on a surface of the glass layerand having a refractive index equal to or smaller than the refractive index of the glass layer

Wavelength conversion member, light-emitting device, and method for manufacturing wavelength conversion member

A wheel-shaped wavelength conversion member includes a first porous ceramic layer having a porosity of at least 20% by volume, a phosphor layer formed on a first principal surface of the first porous ceramic layer, a ceramic heat dissipation layer having a porosity of 20% or less by volume provided on a second principal surface of the first porous ceramic layer opposite the first principal surface, and a second porous ceramic layer having a porosity of at least 20% by volume provided on a surface of the heat dissipation layer opposite the first porous ceramic layer.

Projector light source including wavelength conversion member having porous ceramic substrate

Provided is a luminescent wheel for a projector, which has a novel structure in which a phosphor layer is hard to break even if its thickness is reduced; a manufacturing method therefor; and a light emitting device for a projector. A luminescent wheel for a projector includes: a phosphor layer () which has a first principal surface () and a second principal surface () located on an opposite side to the first principal surface () and is capable of being excited by the entry of excitation light to emit fluorescence; a first glass layer () provided on the first principal surface () of the phosphor layer (); and a second glass layer () provided on the second principal surface () of the phosphor layer ().

Projector-use luminescent wheel and manufacturing method therefor, and projector-use light emitting device

Provided are a wavelength conversion member and a wavelength conversion element which are capable of reducing the decrease in luminescence intensity with time and the melting of a component material when irradiated with light of a high-power LED or LD, and a light emitting apparatus using the wavelength conversion member or the wavelength conversion element. A wavelength conversion member contains, in % by mass, 70 to 99.9% inorganic phosphor particles and 0.1 to 30% easily sinterable ceramic particles, wherein the easily sinterable ceramic particles are interposed between the inorganic phosphor particles and the inorganic phosphor particles are bound together by the easily sinterable ceramic particles.

Wavelength conversion member, wavelength conversion element, and light emitting apparatus using those

Provided is a wavelength conversion member capable of reducing the decrease in luminescence intensity with time and the melting of a component material when irradiated with light of a high-power LED or LD and providing a light emitting device using the wavelength conversion member. The wavelength conversion member () includes a laminate that includes: a phosphor layer (); and light-transmissive heat dissipation layers () formed on both surfaces of the phosphor layer () and having a higher thermal conductivity than the phosphor layer ().

Provided is a fluorescent wheel for a projector capable of suppressing the heating of the phosphor layer and a light emitting device for a projector using the same. The fluorescent wheel for a projector includes: a phosphor layer (); an annular ceramic substrate () which includes a first principal surface provided with the phosphor layer () and a second principal surface located on an opposite side to the first principal surface and has a higher thermal conductivity than the phosphor layer (); and a reflective layer () provided on the second principal surface of the ceramic substrate ().

Fluorescent wheel for projectors and light emitting device for projectors

There is provided a light emitting device using an optical component capable of emitting light having a wavelength different from that of light exit from an optical fiber and obtaining light of high output, and capable of being easily attached to an end of the optical fiber. The optical component includes an optical fiber holding member for holding an optical fiber, a light conversion member, and a cap having an inner hole allowing the light conversion member and the optical fiber holding member to be inserted into and an engagement part with an opening for engaging inserted members at one end of the inner hole. The light conversion member inserted into the inner hole of the cap is fitted into the inner hole with the optical fiber holding member pressed against the engagement part. The opening of the engagement part is smaller than a maximum diameter of the light conversion member.

Optical component and light emitting device using the same

Light emitting portion of an optical fiber lighting apparatus

The optical component according to the present invention includes a fixed member including a through hole, and a wavelength conversion member having at least one part thereof arranged in the through hole, where the fixed member is formed with a cut-in part or a hole part in a direction substantially perpendicular to the longitudinal direction of the through hole.

Growing community of inventors

Otsu, Japan

Tadahito Furuyama