Sony Corporation

Dexerials Corporation

Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Oji Kako Co., Ltd.

Tsuneo Kusunoki

Tomohiko Abe

Katsutoshi Ono

Yuichi Kimizuka

Takahiro Igarashi

Katsutoshi Ohno

Takamasa Izawa

Hiraku Akiho

Norihiro Tateyama

Takehiro Yamasuge

Masahide Daimon

Moriaki Abe

Masaki Kanno

Takashi Tamura

Kazuhiro Yagihashi

Yasushi Ito

Shuichi Haga

Kenji Takayanagi

Hiroshi Itoh

Masaru Ihara

Tomokazu Hino

Masaaki Kawamata

Isamu Kobori

Yoshihide Shimpuku

Koichiro Kakinuma

Shigeo Sasaki

Kenichi Ozawa

Akira Nishio

Takehiro Nakatsue

Morikazu Konishi

Masami Okita

Tatsuhiko Matsumoto

Tomomitsu Hori

Sung-kil Lee

Yu Nomura

Tetsuhiko Isobe

Mamoru Senna

Naoki Isobe

Hirofumi Tani

Miho Konishi

Igarashi Takahiro

Shuji Ohashi

Shuichi Nakazato

Kazuhiko Morizawa

A coated phosphor including: an inorganic phosphor particle; and a silicon oxide coating that coats the inorganic phosphor particle, wherein a molar ratio (O/Si) of an oxygen atom to a silicon atom in the silicon oxide coating through ICP emission spectroscopy of the coated phosphor is 2.60 or less.

Coated phosphor method for producing same, phosphor sheet, and light-emitting device

A green phosphor including: (i) an inorganic phosphor particle; and (ii) neodymium-containing particles attached on a surface of the inorganic phosphor particle, wherein the green phosphor has a light-emission local maximum wavelength in a range of from 500 nm to 570 nm.

Green phosphor, phosphor sheet, and light-emitting device

Coated phosphor, method for producing same, phosphor sheet, and light-emitting device

A compound is provided containing silicon, aluminum, strontium, europium, nitrogen, and oxygen is used that enables a red phosphor having strong luminous intensity and high luminance to be obtained, and that enables the color gamut of a white LED to be increased with the use of red phosphor. The red phosphor contains element A, europium, silicon, aluminum, oxygen, and nitrogen at the atom number ratio of the following formula: [A)Eu]SiAlON. The element A in the formula is at least one of magnesium, calcium, strontium, and barium, and m, x, y, and n in the formula satisfy the relations 3&#x3c;m&#x3c;5, 0&#x3c;x&#x3c;1, 0&#x3c;y&#x3c;2, and 0&#x3c;n&#x3c;10.

Red phosphor, method for producing red phosphor, white light source, illuminating device, and liquid crystal display device

A method for manufacturing green-emitting phosphor particles including the steps of producing a powder containing europium and strontium from a solution containing a europium compound and a strontium compound, mixing the resulting powder and a powdered gallium compound, and performing firing.

Green-emitting phosphor particles, method for manufacturing green-emitting phosphor particles, color conversion sheet, light-emitting device, and image display device assembly

In order to suppress the chromaticity shift and corrosion associated with the deterioration of a sulfide phosphor particle, this phosphor sheet is produced using a phosphor particle-containing resin composition which comprises: covered phosphor particles; polymerizable compound; and a polymerization initiator. The covered phosphor particles are obtained by covering phosphor particles with silicon dioxide films, wherein among the phosphor particles, at least sulfide phosphor particles are covered with silicon dioxide films that contain a metal oxide powder. Thus, the phosphor sheet can be inhibited from emitting a sulfur-based gas, and exhibits a minimized chromaticity shift, even when the phosphor sheet is present in such a manner that the edge of the phosphor layer of the sheet is in an exposed state.

Phosphor sheet

A fluorescent substance, represented by the following general formula (1):Ca(SeS):Eu&#x2003;&#x2003;(1)where y is a value in the range of 0.5 to 1,wherein an absolute value of a difference between an optimal value (nm) of an emission peak wavelength corresponding to the value of y, and a measured value (nm) of the emission peak wavelength is 5 nm or less, and wherein an absolute value of a difference between an optimal value (nm) of a full width at half maximum of emission corresponding to the value of y, and a measured value (nm) of the full width at half maximum of emission is 6 nm or less.

Fluorescent substance and production method thereof

A compound is provided containing silicon, aluminum, strontium, europium, nitrogen, and oxygen is used that enables a red phosphor having strong luminous intensity and high luminance to be obtained, and that enables the color gamut of a white LED to be increased with the use of the red phosphor. The red phosphor contains an element A, europium, silicon, aluminum, oxygen, and nitrogen at the atom number ratio of the following formula: [AEu]SiAlON. The element A in the formula is at least one of magnesium, calcium, strontium, and barium, and m, x, y, and n in the formula satisfy the relations 3&#x3c;m&#x3c;5, 0&#x3c;x&#x3c;1, 0&#x3c;y&#x3c;2, and 0&#x3c;n&#x3c;10.

A phosphor includes (Sr, Ba)SiOwith 1&#x3e;x&#x2267;0.1 as a base material and europium (Eu) as an activator. The emission center wavelength of the phosphor is controlled to be 600 nm or more on the basis of the composition ratio of Sr, Ba, and Eu.

Phosphor and method for manufacturing the same, and light-emitting device and display device using phosphor

A coated phosphor includes a sulfide phosphor coated with silicon dioxide film. The silicon dioxide film includes a metal oxide powder. The metal oxide powder includes a zinc oxide powder such that less than 20 parts by mass of the zinc oxide powder relative to 100 parts by mass of the sulfide phosphor is blended therein.

Coated phosphor and method for producing coated phosphor

A red phosphor of high efficiency and a method for producing it are provided. A white light source and an illumination device that allow illumination with the pure white color using the red phosphor are also provided. In addition, a liquid crystal display device using the red phosphor and exhibiting good color reproducing performance is provided. The red phosphor contains an element A, europium (Eu), silicon (Si), carbon (C), oxygen (O) and nitrogen (N) in the ratios of the numbers of atoms of the following compositional formula (1):[Chemical Formula 1][AEu][SiC]ON&#x2003;&#x2003; compositional formula (1)where the element A is at least one of magnesium (Mg), calcium (Ca), strontium (Sr) and barium (Ba), and where m, x and n in the compositional formula (1) satisfy the relationships of 3&#x3c;m&#x3c;5, 0&#x3c;x&#x3c;1, 0&#x3c;y&#x3c;2 and 0&#x3c;n&#x3c;10 (FIG.A).

Provided is a process for producing a red phosphor, said process achieving enhanced productivity. Also provided are: a red phosphor having excellent luminescence characteristics; and a white light source, a lighting system, and a liquid crystal display device, using the red phosphor. This process comprises: mixing an A-containing compound, a nitrogen-free europium source, a silicon-containing compound, an aluminum-containing compound and a carbon-containing reducing agent so as to form a mixture wherein the atomic ratio among A, europium (Eu), silicon (Si), aluminum (Al) and carbon (C) is a value represented by compositional formula (1); firing the mixture; and pulverizing the fired mixture. (Am&#x2212;xEux)Aly(Si1&#x2212;zCz)90 nN[12+y&#x2212;2(n&#x2212;m)/3] (1) [wherein A is at least one element selected from among magnesium (Mg), calcium (Ca), strontium (Sr) and barium (Ba), and m, x, z and n satisfy the relationships: 3.

Method for manufacturing red phosphor

A process for producing a coated phosphor, namely a phosphor coated with a coating material, which includes a mixing step of mixing a phosphor with a coating material in a solvent to form a mixed fluid and a separation step of separating the mixed fluid into a solid phase and a liquid phase, wherein the phosphor comprises barium (Ba), strontium (Sr), europium (Eu), silicon (Si) and oxygen (O) at an atomic ratio represented by compositional formula (1), and the mass ratio of the phosphor to the coating material is 40:260 to 200:260, [(Ba1-ySry)1-xEux]aSibOc (1) [wherein a, b, c, x and y satisfy the relationships: 2.7&#x3c;a&#x3c;3.3, 0.9&#x3c;b&#x3c;1.1, 4.5&#x3c;c&#x3c;5.5, 0&#x3c;x&#x3c;0.09 and 0.25&#x3c;y&#x3c;0.75].

Method for manufacturing coated phosphor, and coated phosphor

A compound is provided containing silicon, aluminum, strontium, europium, nitrogen, and oxygen is used that enables a red phosphor having strong luminous intensity and high luminance to be obtained, and that enables the color gamut of a white LED to be increased with the use of the red phosphor. The red phosphor contains an element A, curopium, silicon, aluminum, oxygen, and nitrogen at the atom number ratio of the following formula: [AEu]SiAlON. The element A in the formula is at least one of magnesium, calcium, strontium, and barium, and m, x, y, and n in the formula satisfy the relations 3&#x3c;m&#x3c;5, 0&#x3c;x&#x3c;1, 0&#x3c;y&#x3c;2, and 0&#x3c;n&#x3c;10.

Growing community of inventors

Kanagawa, Japan

Tsuneo Kusunoki