Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Kojiro Okuyama

Seigo Shiraishi

Osamu Inoue

Mitsuru Nitta

Hiroshi Nakatsuka

Katsunori Moritoki

Yoshihisa Nagasaki

Masahiro Sakai

Takashi Ohbayashi

Kazuhiko Sugimoto

Toshiyuki Asahi

Takeshi Yamaguchi

Junichi Kato

Osamu Kawasaki

Katsu Takeda

Takehiro Zukawa

Yayoi Okui

Yayoi Kitamura

Koichi Kugimiya

Masamitsu Nishida

Mituru Harada

Masaki Aoki

Junichi Hibino

Hiroshi Kagata

Keiichi Takahashi

Yuki Ueda

Hiroyuki Hase

Masayuki Hogiri

Yoichiro Yokotani

Kenji Harada

Shozo Oshio

Kenji Iijima

Syunichiro Kawashima

Koji Shimoyama

Hiroshi Sogou

Provided is a wavelength conversion member capable of improving brightness of a light source device. Wavelength conversion member according to the present disclosure includes: first phosphor layer that is disposed on an incidence side where excitation light enters, and contains a plurality of first phosphor particles; and second phosphor layer that is disposed on a side reverse to the incidence side and contains a plurality of second phosphor particles. First phosphor particles include an activation component, second phosphor particles include an activation component same as or different from the activation component included in first phosphor particles, and a concentration of the activation component in first phosphor layer is lower than a concentration of the activation component in second phosphor layer.

Wavelength conversion member, light source device using same, projector and vehicle

A light source device includes: an excitation light source that emits excitation light having an energy density of 10 W/mmor more; and a phosphor layer that has phosphor particles embedded in the matrix. The phosphor particles include at least one selected from the group consisting of metal oxides represented by a following formula (1) and metal oxides represented by a following formula (2).YRCeAlGaO&#x2003;&#x2003;(1)YRCeAlScO&#x2003;&#x2003;(2) In the formula (1), Rincludes at least one selected from the group consisting of Gd and Tb, and x, y, and zsatisfy 0.003&#x2264;x&#x2264;0.03, 0&#x2264;y&#x2264;2.1, and 0&#x2264;z&#x2264;2.2, respectively. In the formula (2), Rincludes at least one selected from the group consisting of Gd and Tb, and x, y, and zsatisfy 0.003&#x2264;x&#x2264;0.03, 0&#x2264;y&#x2264;2.1 and 0&#x2264;z&#x2264;1.5, respectively.

Light source device, projector, and vehicle

A phosphor includes, as a main component, a compound represented by a general formula (3-a)YO.aCeO.(5-b)AlO.bGaO.cKO.dPO, where a, b, c and d satisfy 0.12&#x2264;a&#x2264;0.18, 1.50&#x2264;b&#x2264;3.00, 0.01&#x2264;c&#x2264;0.08, and 0.01&#x2264;d&#x2264;0.08.

Phosphor, method of producing same, and light-emitting device

A wavelength conversion member comprises: a substrate; and a wavelength conversion layer. The wavelength conversion layer contains a first phosphor and a second phosphor. The second phosphor has a higher thermal conductivity than the first phosphor. In the wavelength conversion layer, a volume of the second phosphor is larger than a volume of the first phosphor. The wavelength conversion layer includes a first portion and a second portion. The first portion is located closer to the substrate than the second portion, and is in direct contact with the second portion. Thicknesses of the first portion and the second portion are equal to each other. A volume V11 of the first phosphor in the first portion, a volume V12 of the second phosphor in the first portion, a volume V21 of the first phosphor in the second portion, and a volume V22 of the second phosphor in the second portion satisfy V11/V12&#x3c;V21/V22.

Wavelength conversion member including phosphor

An oxychloride phosphor of the present disclosure includes divalent Eu arranged as an augmenting agent, at part of locations. The locations correspond to site of at least two kinds of predetermined substances included in a host crystal. A rate of the number of the divalent Eu with respect to the sum of the number of moles of the predetermined substance and the number of moles of the divalent Eu is less than 2%. When the predetermined substance is represented by A, the oxychloride phosphor is represented by a general formula of xAO.yEuO.SiO.zCl. In this formula, A represents Sr and Ca, or Sr, Ca, and Mg, y indicates a value of not less than 0.002 and not more than 0.02, x+y indicates a value of more than 1.00 and not more than 1.30, and z indicates a value of not less than 0.20 and not more than 0.70.

Oxychloride phosphor, light emitting device, lighting apparatus, and vehicle

A red phosphor material includes an essential component represented by a formula of AREuSmLnMOas a main component, where A represents at least one selected from Ca and Sr; R represents at least one selected from Li, Na, and K; Ln represents at least one selected from La, Gd, and Y; M represents at least one selected from W and Mo; and x, y, and z are numerical values that satisfy 0.2&#x2266;x&#x2266;0.7, 0.2&#x2266;y+z&#x2266;0.6, 0.005&#x2266;z&#x2266;0.04, and x&#x2212;y&#x2212;z&#x2267;0. 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.

Red phosphor material and light-emitting device

A phosphor includes a host crystal including SrMgSiOcrystal and SrMgSiOcrystal and also includes Eu, or Euand Mnas luminescent centers. Alternatively, a phosphor includes a host crystal including SrMgSiOcrystal and SrMgSiOand also includes Euas a luminescent center, the phosphor being free from Mnas a luminescent center. A light-emitting device includes a phosphor layer containing the phosphor. A projector and a vehicle include the light-emitting device.

Phosphor, light-emitting device including said phosphor, projector, head-up display and vehicle including said light-emitting device

A red phosphor material comprising an essential component represented by a formula of ALnEuSmMOas 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&#x2266;x+y&#x2266;0.7 and 0.005&#x2266;y&#x2266;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.

The present invention provides an oxynitride silicate fluorescent substance capable of output a light having a high luminance even when irradiated by an exciting light having a high energy density. The present invention is a yellow fluorescent substance represented by a chemical formula (Ba,Sr)SiON:Eu,Y(0.9&#x2266;a&#x2266;1.1, 1.9&#x2266;b&#x2266;2.1, 1.9&#x2266;c&#x2266;2.1, 1.9&#x2266;d&#x2266;2.1, 0&#x2266;x&#x2266;1, 0&#x3c;y&#x3c;0.01, and 0&#x2266;z&#x3c;0.01).

Yellow fluorescent substance, light-emitting device, illumination device, and vehicle

A fluorescent material according to an aspect of the present disclosure mainly comprises a compound represented by ABCEuSmLnWO. A is one or more elements selected from the group consisting of alkaline earth metals and mainly contains Ca. B is one or more elements selected from the group consisting of divalent metals and mainly contains Mg. C is one or more elements selected from the group consisting of alkali metals and mainly contains Li, Na, or Li and Na. Ln is one or more elements selected from the group consisting of rare earth elements excluding Eu and Sm. w, x, y, and z meet the following conditions: 0.05&#x2266;w&#x2266;0.25, 0.05&#x2266;x+y&#x2266;0.25, 0.0&#x2266;y&#x2266;0.02, and w=x+y+z.

Fluorescent material and light-emitting device

The present disclosure provides a (Ba,Sr)MgSiO:Eubased phosphor with high emission quantum efficiency. Specifically, the present disclosure provides a blue light emitting phosphor including: a (Ba,Sr)MgSiObased crystal where z satisfies 0&#x2266;z&#x3c;1 and a (Ba,Sr)MgSiObased crystal where z satisfies 0&#x2266;z&#x3c;1 as a host crystal; and Euas a luminescent center.

Phosphor, light-emitting device, image pickup device, liquid crystal display device, lighting device, and vehicle

A light source device is provided. The light source device comprises a semiconductor light-emitting element; and a wavelength conversion member for converting a wavelength of a light emitted from the semiconductor light-emitting element. The semiconductor light-emitting element has a light-emitting peak wavelength of not less than 380 nanometers and not more than 420 nanometers. The light emitted from the semiconductor light-emitting element has a light energy density of not less than 0.2 kW/cm. The wavelength conversion member contains at least one fluorescent substance selected from the group consisting of a (Sr,Ba)MgSiO:Eu(0&#x2266;x&#x2266;1) fluorescent substance, a (Y,Gd)(Al,Ga)O:Ce(0&#x2266;y&#x2266;1, 0&#x2266;z&#x2266;1) fluorescent substance, and an Eu-activated fluorescent substance. The light source device has a high output and a high light-emitting efficiency.

Light source device including a high energy light source and a wavelength conversion member, illuminating device comprising the same, and vehicle

A phosphor material according to an embodiment of the present disclosure contains a major component represented by the formula ABLnEuSmMDO, 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&#x2266;v&#x2266;0.5, 0.15&#x2266;x+y&#x2266;0.7, 0&#x2266;y&#x2266;0.05, and 0&#x3c;z&#x2266;1.7 and the equation w+x+y=v+z.

Phosphor material and light-emitting device

The present invention provides a new phosphor with a controllable emission wavelength without using a number of rare and expensive raw materials in forming the composition. The phosphor includes a compound including a fluorescent ion and having a garnet structure including a rare earth element, aluminum, and oxygen. The compound has such a composition that a combination of the rare earth element and the aluminum of the compound is partially replaced with a combination of alkaline earth metal and zirconium (Zr) or alkaline earth metal and hafnium (Hf).

Rare earth aluminum garnet type phosphor and light-emitting device using the same

A plasma display panel having a short decay time, high luminance, and high efficiency is provided. The plasma display panel includes a green phosphor layer that emits visible light when excited with vacuum ultraviolet rays. The green phosphor layer contains a green phosphor represented by the general formula aBaO.(2-a)EuO.bMgO.cSiO.fCaCl(where 1.800&#x2266;a&#x2266;1.980, 0.950&#x2266;b&#x2266;1.050, 1.900&#x2266;c&#x2266;2.100, and 0.001&#x2266;f&#x2266;0.020).

Growing community of inventors

Nara, Japan

Kojiro Okuyama