Group Iv Element Containing Patents (Class 252/301.4F)
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Patent number: 7790058Abstract: A phosphor (A) comprising a host material composed of a compound having a garnet crystal structure represented by the general formula (I): M1aM2bM3cOd??(I) (wherein M1 is a divalent metal element, M2 is a trivalent metal element, M3 is a tetravalent metal element containing at least Si, a is the number of 2.7 to 3.3, b is the number of 1.8 to 2.2, c is the number of 2.7 to 3.3, and d is the number of 11.0 to 13.0), and a luminescent center ion incorporated in the host material; a light emitting device (B) comprising the phosphor as a wavelength conversion material and a semiconductor light emitting element capable of emitting a light in the range of from ultraviolet light to visible light; and a display (C) and a lighting system (D) using the light emitting device (B) as a light source. The above phosphor can be readily produced, and can provide a light emitting device having a high color rendering property.Type: GrantFiled: May 21, 2008Date of Patent: September 7, 2010Assignee: Mitsubishi Chemical CorporationInventors: Yasuo Shimomura, Naoto Kijima
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Patent number: 7780871Abstract: A type of inorganic light-emitting material for a UV solid light source is described. The inorganic light-emitting material is fluorescent powder for a silicate-based UV solid light source. The main ingredient is Sr2CaLn2(SiO4)3±?. The center of the light-emitting part is the material entering the cation light lattice node. The material is Eu+2, Sm+2, Yb+2, Mn+2, Sn+2, and Cu+2 series +2 valence ions. The second part of the light-emitting is the +3 valence TR+3 ions of Ce+3, Eu+3, Tb+3, Sm+3, and Dy+3 series distributed inside the nodes. When the chemical index is 0???0.2, the indium nitride and gallium nitride-based allomorphous semiconductor short wave UV light, under conditions of excitement, produces light radiation wavelength ??430 nm multiple band white light that can then be used. The color temperature is between T=2500K and 12000K.Type: GrantFiled: April 26, 2006Date of Patent: August 24, 2010Inventor: Soshchin Naum
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Patent number: 7780872Abstract: A fluorescent substance includes a crystal of nitride or oxy-nitride having a ?-type Si3N4 crystal structure having Eu+2 solid-dissolved into it and emitting a fluorescent light having a peak within a range of 500 nm to 600 nm in wavelength by being irradiated with an excitation source. The fluorescent substance further includes another crystalline or amorphous compound different from the nitride or oxy-nitride crystal and a quantity of the nitride or oxy-nitride crystal contained in the fluorescent substance is 50 wt % or more.Type: GrantFiled: January 22, 2009Date of Patent: August 24, 2010Assignee: National Institute for Materials ScienceInventor: Naoto Hirosaki
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Patent number: 7763183Abstract: Provided is an electron beam-excited blue phosphor, which is a rare earth-activated alkaline earth thiosilicate represented by a general formula M1xM22-xSi2OyS6-yRaz where M1 and M2 each represent an alkaline earth metal, Ra represents a rare earth ion Ce3+ or Eu2+, and x, y, and z satisfy relationships of 0?x?2, 0<y<6, and z?0.005, respectively.Type: GrantFiled: September 25, 2007Date of Patent: July 27, 2010Assignee: Canon Kabushiki KaishaInventor: Shoshiro Saruta
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Patent number: 7758774Abstract: The present invention provides a process for producing a luminescent glass, comprising the steps of adsorbing, to a porous high silica glass, at least one metal component selected from the group consisting of elements of Groups IIIA, IVA, VA, VIA, VIIA, VIII, IB, IIB and IVB of the Periodic Table; and thereafter heating the porous glass in a reducing atmosphere. The luminescent glass obtained by the process is excellent in heat resistance, chemical durability, mechanical strength and other properties, and exhibits strong luminescence when irradiated with UV light or the like. The glass can be effectively used as a luminous body for lighting systems, display devices, etc.Type: GrantFiled: November 28, 2003Date of Patent: July 20, 2010Assignees: Japan Science and Technology Agency, National Institute of Advanced Industrial Science and TechnologyInventors: Danping Chen, Tomoko Akai
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Patent number: 7758775Abstract: This invention relates to a green phosphor and a process for producing the same, wherein the phosphor is represented by a chemical formula: M(Tb1-xLax)4Si3O13, where M includes at least one of Ca and Sr, and 0<x<1, and is obtained by mixing at proper ratios and calcining at a high temperature in an oxygen-containing atmosphere. When the produced phosphor is excited by a near ultra-violet light of 378 nm, a green light having its main peak at 541 nm is emitted, and the x and y values of its CIE coordinate are in respective ranges of (0.34-0.37) and (0.52-0.55). The method for producing the phosphor includes steps of weighing and mixing the ingredient powder, and calcining in the oxygen-containing atmosphere at high temperature to form the phospher.Type: GrantFiled: June 14, 2007Date of Patent: July 20, 2010Assignee: National Chiao-Tung UniversityInventors: Teng-Ming Chen, Yi-Chen Chiu
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Patent number: 7736535Abstract: A phosphor having high luminescence when excited by vacuum ultraviolet ray and a vacuum ultraviolet radiation excited light-emitting device comprising the phosphor. The phosphor comprises a metal oxide comprises at least one metal element M1 selected from the group consisting of Ca, Sr and Ba, at least one metal element M2 selected from the group consisting of Y, La, Gd and Lu, at least one metal element M3 selected from the group consisting of Si and Ge and oxygen, and at least one metal element Ln1 selected from the group consisting of Ce, Pr, Nd, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Mn, as an activator.Type: GrantFiled: August 28, 2003Date of Patent: June 15, 2010Assignee: Sumitomo Chemical Company, LimitedInventors: Takashi Takeda, Kenji Ono, Susumu Miyazaki
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Patent number: 7713443Abstract: An object of the present invention is to provide an inorganic phosphor, particularly, an oxynitride phosphor containing alkaline earths which has a higher luminance than that of conventional sialon phosphors activated with a rare earth, and is chemically stable. By baking a raw material mixture containing at least silicon nitride powder, M element containing inorganic substance, and A element containing inorganic substance at a temperature range of 1200° C. to 2200° C. in a nitrogen atmosphere, a phosphor comprising an inorganic composition containing at least M Element, A Element, silicon, oxygen, and nitrogen (wherein M Element is one or two or more elements selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb, A Element is one or two or more elements selected from the group consisting of Mg, Ca, Sr, and Ba) and containing at least crystal having the same crystal structure as that of A2Si5N8 and A element-containing crystal is obtained.Type: GrantFiled: January 25, 2006Date of Patent: May 11, 2010Assignee: National Institute For Materials ScienceInventors: Naoto Hirosaki, Rong-Jun Xie
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Patent number: 7713441Abstract: To present a green- to yellow-emitting phosphor whereby a light-emitting device having high color rendering properties and high luminance can be obtained, a light-emitting device employing such a phosphor, and an image display device and a lighting system, containing such a light-emitting device. A phosphor made of a compound represented by the following formula (I), which comprises, as matrix, a compound of a garnet structure and which contains, as a luminescent center ion, a metal element in the matrix: M1aM2bXcM3dM43Oe??(I) wherein M1 is Mg and/or Zn, M2 is a bivalent metal element excluding Mg and Zn, X is a metal element as a luminescent center ion composed mainly of Ce, M3 is a trivalent metal element excluding X, M4 is a tetravalent metal element, and a, b, c, d and e are numbers satisfying the following formulae, respectively: 0.001?a?0.5 2.5?b?3.3 0.005?c?0.5 1.5?d?2.3 e={(a+b)×2+(c+d)×3+12}/2.Type: GrantFiled: October 14, 2005Date of Patent: May 11, 2010Assignee: Mitsubishi Chemical CorporationInventors: Yasuo Shimomura, Naoto Kijima, Tomoyuki Kurushima
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Publication number: 20100102276Abstract: The present invention provides a phosphor for an ultraviolet excited light-emitting device, a phosphor paste and an ultraviolet excited light-emitting device. A phosphor for an ultraviolet excited light-emitting device, the phosphor comprising an oxide containing M1, M2 and M3 as a matrix and an activator, wherein M1 represents at least one element selected from the group consisting of Ba, Sr and Ca, M2 represents at least two elements selected from the group consisting of Ti, Zr and Hf, and M3 represents at least one element selected from the group consisting of Si and Ge.Type: ApplicationFiled: February 27, 2008Publication date: April 29, 2010Applicant: SUMITOMO CHEMICAL COMPANY ,LIMITEDInventors: Satoru Kuze, Yoshiko Nakamura
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Patent number: 7700002Abstract: The invention concerns an illumination system comprising a radiation source and a fluorescent material comprising at least one phosphor capable of absorbing part of the light emitted by the radiation source and emitting light of a wavelength different from that of the absorbed light; wherein said at least one phosphor is a yellow to red-emitting europium(II) activated halogeno-oxonitridosilicate of the general formula EaxSiyN2/3X+4/3y:EuzOaXb, wherein 1?x?2; 3?y?7; 0.001?z?0.09, 0.005<a?5 0.05, 0.01<b?0.3, EA is at least one earth alkaline metal chosen from the group of calcium, barium and strontium and X is at least one halogen chosen from the group of fluorine, chlorine, bromine and iodine. The invention is also concerned with a red to yellow-emitting europium(II)-activated halogeno-oxonitridosilicate of the general formula EaxSiyN2/3x+4/3y:EuzOaXb, wherein 1?x?2; 3?y??7; 0.001<z?0.09, 0.005<a?0.05, 0.01<b?0.Type: GrantFiled: May 23, 2005Date of Patent: April 20, 2010Assignees: Koninklijke Philips Electronics N.V., Philips Lumileds Lighting, US, LLCInventors: Peter Schmidt, Thomas Justel, Henning Hoppe, Wolfgang Schnick, Walter Mayr
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Patent number: 7695641Abstract: The present invention provides an organic/inorganic composite containing a rare earth metal or/and Period IV transition metal in which the aforementioned rare earth metal or/and Period IV transition metal is doped at a high concentration, and control of quenching and optical transparency are assured thereby; and an optical amplifier, a light control optical element, and luminescent device utilizing the same. The organic/inorganic composite containing a rare earth metal or/and Period IV transition metal is one in which at least one species of rare earth metal or/and Period IV transition metal is dispersed in an organic polymer, with the aforementioned composite containing an optically transparent organic polymer and an inorganic dispersion phase comprising: (1) a rare earth metal and (2) another element coordinated thereto via an oxygen atom(s).Type: GrantFiled: June 30, 2005Date of Patent: April 13, 2010Assignee: KRI, Inc.Inventors: Hiroshi Mataki, Toshimi Fukui
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Patent number: 7682524Abstract: A phosphor material for producing white light under excitation of UV light and a method for making the same. The phosphor material is an alkaline-earth silicates compound with a chemical formula of (A2-x-yCexEuy)SiO4. A is one or more elements selected from the collection of Ba, Sr and Ca alkaline-earth metals. The range of x and y correspond to 0<x<1.0 and 0<y?0.5 respectively. The phosphor material requires two rare earth elements: Ce and Eu. By blending the best co-doped composition of Ce and Eu ions, the single phosphor can directly produce white light under UV light excitation. In addition, the material in this invention is easy and fast to prepare in a large amount. Therefore, the phosphors can have a high industrial value.Type: GrantFiled: June 27, 2007Date of Patent: March 23, 2010Assignee: National Central UniversityInventors: Ru-Shi Liu, Ivan Baginskiy, Ting-Shan Chan, Jeng-Yang Chang
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Patent number: 7682525Abstract: A phosphor material composition for producing blue phosphor by the excitation of UV light and a method for making the same. The phosphor material is an alkaline-earth silicates compound with a chemical formula of A2-xSiO4:Cex. A includes one or more elements selected from the collection of Ba, Sr and Ca alkaline-earth metals. The host is A2-xSiO4 and the activator is Ce3+. The characteristic of this invention is the blue phosphor material with a high luminescence intensity that can be excited by UV light. In addition, the material in this invention is easy and fast to prepare in a large amount, and the material itself has advantage such as color purity and thermal stability, so as to have a high industrial value.Type: GrantFiled: June 27, 2007Date of Patent: March 23, 2010Assignee: National Central UniversityInventors: Ru-Shi Liu, Ivan Baginskiy, Ting-Shan Chan, Jenq-Yang Chang
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Publication number: 20100065778Abstract: The invention relates to an inorganic scintillator material of formula Lu(2-y)Y (y-z-x) CexMzSi (1-v) M? vO5, in which: M represents a divalent alkaline earth metal and M? represents a trivalent metal, (z+v) being greater than or equal to 0.0001 and less than or equal to 0.2; z being greater than or equal to 0 and less than or equal to 0.2; v being greater than or equal to 0 and less than or equal to 0.2; x being greater than or equal to 0.0001 and less than 0.1; and y ranging from (x+z) to 1. In particular, this material may equip scintillation detectors for applications in industry, for the medical field (scanners) and/or for detection in oil drilling. The presence of Ca in the crystal reduces the afterglow, while stopping power for high-energy radiation remains high.Type: ApplicationFiled: November 20, 2009Publication date: March 18, 2010Applicant: SAINT-GOBAIN CRISTAUX ET DETECTEURSInventors: Bernard Ferrand, Bruno Viana, Ludivine Pidol, Pieter Dorenbos
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Patent number: 7678294Abstract: An illuminator includes a light emitting light source and a fluorescent substance. The fluorescent substance includes a crystal of nitride or oxy-nitride having a ?-type Si3N4 crystal structure having Eu+2 solid-dissolved into it and emitting a fluorescent light having a peak within a range of 500 nm to 600 nm in wavelength by being irradiated with an exciting light.Type: GrantFiled: December 16, 2008Date of Patent: March 16, 2010Assignee: National Institute for Materials ScienceInventor: Naoto Hirosaki
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Publication number: 20100044633Abstract: The present invention relates to a waterproof multiple rare-earth co-activated long-afterglow luminescent material having its general chemical composition depicted by a formula aMO.bAl2O3.cSiO2.dGa2O3: xEu.yB.zN, wherein a, b, c, d, x, y, and z are coefficients with the ranges of 0.5?a?2, 0.5?b?3, 0.001?c?1, 0.0001?d?1, 0.0001?x?1, 0.0001?y?1, 0.0001?z?1, M is Ca or Sr, N is Dy or Nd, wherein Sr (or Ca), Al, Si, Ga are main substrate matrix elements and Eu, B, Dy (or Nd) elements are activators. The waterproof multiple rare-earth co-activated long-afterglow luminescent material according to the present invention not only has advantage of a longer afterglow time, but also has water resistance greatly superior to rare-earth activated aluminate long-afterglow luminescent material in the prior art, and still keeps higher long-afterglow property after dipping into water for 60 hours, especially shows its superiority when working or used under the environment of dipping into water or dampness.Type: ApplicationFiled: November 15, 2007Publication date: February 25, 2010Applicant: SICHUAN SUNFOR LIGHT CO., LTD.Inventors: Ming Zhang, Kun Zhao
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Publication number: 20100038590Abstract: There is provided a method for preparing a ?-SiAlON phosphor capable of be controlled to show characteristics such as high brightness and desired particle size distribution. The method for preparing a ?-SiAlON phosphor represented by Formula: Si(6-x)AlxOyN(6-y):Lnz (wherein, Ln is a rare earth element, and the following requirements are satisfied: 0<x?4.2, 0<y?4.2, and 0<z?1.0) includes: mixing starting materials to prepare a raw material mixture; and heating the raw material mixture in a nitrogen-containing atmospheric gas, wherein the starting materials includes a host raw material including a silicon raw material including metallic silicon, and at least one aluminum raw material selected from the group consisting of metallic aluminum and aluminum compound, and at least activator raw material selected from the rare earth elements for activating the host raw material.Type: ApplicationFiled: May 21, 2009Publication date: February 18, 2010Inventors: Hideo Suzuki, Chul Soo Yoon, Hyong Sik Won, Jeong Ho Ryu, Youn Gon Park, Sang Hyun Kim
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Patent number: 7662311Abstract: A novel fluorescent substance for a light-emitting diode, emitting light of any one of three primary colors by excitation of an ultraviolet light-emitting diode. Alternatively, a novel fluorescent substance for a light-emitting diode, emitting light in a red region of a spectrum by excitation of a blue light-emitting diode. Na2SrSi2O6 is doped with Eu3+. Preferably, Eu3+ is added so as to account for 1 to 80 mol % in concentration in a host crystal, while sites of Si4+ in Na2SrSi2O6. are replaced by Al3+ and/or Ga3+. Alternatively, Ca3Si2O7 is doped with Ce3+ and Tb3+. Preferably, Ce3+ and Tb3+ are added so as to account for 0.1 to 80 mol % and 0.1 to 20 mol % in concentration in a host crystal, respectively. Still alternatively, Ca3Si2O7 is doped with Eu2+. Preferably, Eu2+ is added so as to account for 0.5 to 10 mol % in concentration in the host crystal.Type: GrantFiled: April 4, 2006Date of Patent: February 16, 2010Assignee: Niigata UniversityInventors: Kenji Toda, Mineo Sato, Kazuyoshi Uematsu, Shinichiro Kousaka, Yoshitaka Kawakami
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Publication number: 20100032622Abstract: A phosphor providing orange-yellow radiation is prepared from a cerium activated rear-earth garnet substrate that contains Li (lithium), Si (silicon), N (nitrogen) and F (fluorine) atoms, obtaining the overall stoichiometric equation of (?Ln)3Al5-x-yLiy/3Mgx/2Si(x/2+2y/3)Fq/2O12-qNq/2. When the activating wavelength is 440˜475 nm, the orange sub-energy band becomes 542˜590 nm, and the radiation quantum output q>0.9, showing a cubic crystal garnet structure. The phosphor has color coordinate ?(x+y)?0.89, and color purity ??0.89. The invention also provides a warm white LED that has light intensity J?300 cd, half open angle 2??60°, luminous efficiency 65 ???100 lm/W, and color temperature within 2800?T?5500K.Type: ApplicationFiled: February 7, 2008Publication date: February 11, 2010Inventors: Soshchin Naum, Wei-Hung Lo, Chi-Ruei Tsai
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Patent number: 7655156Abstract: Novel orange phosphors are disclosed having the comprise silicate-based compounds having the formula (Sr,A1)x,(Si,A2)(O,A3)2+x:Eu2+, where A1 is at least one divalent cation (a 2+ ion) including Mg, Ca, Ba, or Zn, or a combination of 1+ and 3+ cations; A2 is a 3+, 4+, or 5+ cation, including at least one of B, Al, Ga, C, Ge, P; A3 is a 1?, 2?, or 3? anion, including F, Cl, and Br; and x is any value between 2.5 and 3.5, inclusive. The formula is written to indicate that the A1 cation replaces Sr; the A2 cation replaces Si, and the A3 anion replaces O. These orange phosphors are configured to emit visible light having a peak emission wavelength greater than about 565 nm. They have applications in white LED illumination systems, plasma display panels, and in orange and other colored LED systems.Type: GrantFiled: October 25, 2005Date of Patent: February 2, 2010Assignee: Intematix CorporationInventors: Shifan Cheng, Dejie Tao, Yi Dong, Yi-Qun Li
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Patent number: 7651632Abstract: The invention relates to an inorganic scintillator material of formula Lu(2?y)Y(y?z?x)CexMzSi(1?v)M?vO5, in which: M represents a divalent alkaline earth metal and M? represents a trivalent metal, (z+v) being greater than or equal to 0.0001 and less than or equal to 0.2, z being greater than or equal to 0 and less than or equal to 0.2; v being greater than or equal to 0 and less than or equal to 0.2, x being greater than or equal to 0.0001 and less than 0.1; and y ranging from (x+z) to 1. In particular, this material may equip scintillation detectors for applications in industry, for the medical field (scanners) and/or for detection in oil drilling, The presence of Ca in the crystal reduces the afterglow, while stopping power for high-energy radiation remains high.Type: GrantFiled: August 8, 2005Date of Patent: January 26, 2010Assignee: Saint-Gobain Christaux Et DetecteursInventors: Bernard Ferrand, Bruno Viana, Ludivine Pidol, Pieter Dorenbos
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Patent number: 7651634Abstract: A light-emitting device is produced using a phosphor composition containing a phosphor host having as a main component a composition represented by a composition formula: aM3N2.bAlN.cSi3N4, where “M” is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn, and “a”, “b”, and “c” are numerical values satisfying 0.2?a/(a+b)?0.95, 0.05?b/(b+c)?0.8, and 0.4?c/(c+a)?0.95. This enables a light-emitting device emitting white light and satisfying both a high color rendering property and a high luminous flux to be provided.Type: GrantFiled: April 8, 2008Date of Patent: January 26, 2010Assignee: Panasonic CorporationInventor: Shozo Oshio
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Publication number: 20100012897Abstract: The invention relates to a new class of luminescent substances (phosphorous) based on an universally dopable matrix made of an amorphous, at the most partially crystalline network of the elements P, Si, B, Al and N, preferably the composition Si3B3N7. Optical excitation and emission can be varied in this system over the entire practically relevant field by incorporation of any cationic activators, alone or in combination, but also by incorporation of oxygen as anionic component. This opens up the entire spectrum of use of luminescent substances, such as illumination systems or electronic screens.Type: ApplicationFiled: October 31, 2007Publication date: January 21, 2010Applicant: MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN E.V.Inventors: Martin Jansen, Hasan Cakmak
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Patent number: 7648650Abstract: Novel aluminum-silicate based orange-red phosphors, with mixed di- and trivalent cations are disclosed. The phosphors have the formula (Sr1?x?yMxTy)3?mEum(Si1?zAlz)O5, where M is at least one of Ba, Mg, Ca, and Zn in an amount ranging from 0?x?0.4. T is a trivalent metal in an amount ranging from 0?y?0. This phosphor is configured to emit visible light having a peak emission wavelength greater than about 580 nm. The phosphors may contain a halogen anion such as F, Cl, and Br, at least some of which is substitutionally positioned on oxygen lattice sites. The present aluminum-silicate phosphors have applications in white and orange-red illumination systems, as well as plasma display panels.Type: GrantFiled: April 9, 2007Date of Patent: January 19, 2010Assignee: Intematix CorporationInventors: Shengfeng Liu, Shifan Cheng, Yi-Qun Li
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Publication number: 20100001234Abstract: To reduce impurity contents of carbon and oxygen not contributing to light emission, then suppress deterioration of emission intensity of a phosphor, and improve emission efficiency of this phosphor. Therefore, there is provided a firing method of nitride or oxynitride phosphors, wherein a crucible 11 made of nitride is used as a firing container, and firing is performed, with this crucible covered with a lid (container 10), to manufacture the phosphor. The phosphor is expressed by a general composition formula MABOoN3-2/3O:Z in which element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is an activating agent, satisfying o?0.Type: ApplicationFiled: September 7, 2007Publication date: January 7, 2010Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.Inventors: Masahiro Gotoh, Kenji Sakane
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Publication number: 20090314989Abstract: The present invention is to provide a fluorescent substance composite glass which is chemically stable, has a large size, is reduced in wall thickness, has a uniform thickness and therefore has a high energy conversion efficiency, a fluorescent substance composite glass green sheet and a process for producing the fluorescent substance composite glass. The fluorescent substance composite glass of the present invention is produced by baking a mixture containing a glass powder and an inorganic fluorescent substance powder, in which the energy conversion efficiency to a visible light wavelength region of 380 to 780 nm is 10% or more, when light having an emission peak in a wavelength range of 350 to 500 nm is applied.Type: ApplicationFiled: April 11, 2006Publication date: December 24, 2009Inventors: Masaru Iwao, Yoshio Umayahara
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Patent number: 7635438Abstract: A europium-activated alkaline earth orthosilicate luminescent material is provided, which includes a compound having a composition represented by a following formula 1: (SrxBayCazEuw)2SiO4??formula 1 wherein, x, y, z and w satisfy following relational expressions 2, and 4 to 7, and are values satisfying the expression 3 when a, b, c and d are assumed to be 573, 467, 623 and 736, respectively: x+y+z+w=1??expression 2 600?ax+by+cz+dw??expression 3 0?x/(1?w)?0.95??expression 4 0?y/(1?w)?0.4??expression 5 0<z/(1?w)?0.95??expression 6 0.02?w?0.2??expression 7 the luminescent material shows an emission band having a peak wavelength of 600 nm or more when the luminescent material is excited by ultraviolet radiation having a wavelength of 254 nm.Type: GrantFiled: July 18, 2007Date of Patent: December 22, 2009Assignees: Kabushiki Kaisha Toshiba, Toshiba Lighting & Technology CorporationInventors: Masaaki Tamatani, Hisayo Uetake, Ryosuke Hiramatsu, Kazuaki Ootsuka, Yasushi Hattori, Naomi Shida
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Publication number: 20090309067Abstract: There is provided a method of making a SrB6O10:Pb phosphor that increases the manufactured quantity of the SrB6O10:Pb phosphor by approximately seven fold when using the same size reaction vessel, decreases the lead-containing waste stream, and eliminates the use of hazardous concentrated ammonium hydroxide. The UV emission brightness is equivalent to or better than the same phosphor when prepared using prior methods.Type: ApplicationFiled: June 2, 2009Publication date: December 17, 2009Applicant: OSRAM SYLVANIA INC.Inventors: Gregory A. Marking, Chad E. DeForest, Eric R. Mercer
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Patent number: 7622057Abstract: A phosphor and a vacuum ultraviolet excited light-emitting device are disclosed. The phosphor comprises a compound represented by the following formula (1) Ca1?a?bSraEubMgSi2O6??(1) wherein 0.1<a?0.35 and 0.003?b?0.02. The phosphor is excited by vacuum ultraviolet and emits blue light with high brightness. The vacuum ultraviolet excited light-emitting device comprises the above phosphor.Type: GrantFiled: May 13, 2004Date of Patent: November 24, 2009Assignee: Sumitomo Chemical Company, LimitedInventors: Toshinori Isobe, Keiji Ono, Susumu Miyazaki
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Publication number: 20090283720Abstract: A transparent, nano-composite material and methods for making structures from this material are provided. In one embodiment, the material is made from a polycrystalline matrix containing dispersed particles of a harder material. The particles are less then about 100 nm. In other embodiments, methods for making structures from the material are provided. In one aspect, the methods include blending precursor powders for the matrix and reinforcing phases prior to forming and sintering to make a final structure. In other aspects, a precursor powder for the matrix is pressed into a green shape, which is partially sintered and exposed to a solution containing a precursor for the reinforcing phase, prior to be sintered into the final material. In another aspect, the precursor powder for the matrix is coated with a sol-gel precursor for the reinforcing material, then pressed into a green shape and sintered to form the final structure.Type: ApplicationFiled: December 6, 2006Publication date: November 19, 2009Inventors: Sean Michael Sweeney, Sergio Martins Loureiro, Timothy Yosenick
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Patent number: 7618556Abstract: Provided are an alkaline earth metal silicate-based phosphor which is a compound represented by Formula 1 below, and a white light-emitting device (LED) including the same. (M11-x-yAxBy)aMgbM2cOdZe??Formula 1 wherein, M1 is one selected from the group consisting of Ba, Ca, and Sr; M2 is at least one selected from Si or Ge; A and B are each independently one selected from the group consisting of Eu, Ce, Mn, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Bi, Sn, and Sb; Z is at least one selected from the group consisting of a monovalent or divalent element, H, and N; and 0<x<1, 0?y?1, 6.3<a<7.7, 0.9<b<1.1, 3.6<c<4.4, 14.4<d<17.6, 14.4<d+e<17.6, and 0?e?0.18. The alkaline earth metal silicate-based phosphor has a broad excitation wavelength range, and thus, both a UV-LED and a blue LED can be used as excitation sources for white LEDs.Type: GrantFiled: March 19, 2007Date of Patent: November 17, 2009Assignee: Samsung Electro-mechanics Co., Ltd.Inventors: Kubota Shunichi, Young-sic Kim, Seoung-jae Im
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Patent number: 7618557Abstract: This invention provides a phosphor capable of emitting a white light by itself and a light emitting module using the phosphor. A white light emitting phosphor is represented by the following formula, and it is preferable that an excitation peak wavelength may be in a range of 350 to 420 nm: Ba4?x?y?zMgxSi2O8: Euy, Mnz (0.7?x<1, 0<y and 0<z). The white light emitting phosphor can constitute the light emitting module with a semiconductor light emitting device having an emission peak wavelength from 350 to 420 nm.Type: GrantFiled: July 3, 2007Date of Patent: November 17, 2009Assignee: Koito Manufacturing Co., Ltd.Inventors: Hisayoshi Daicho, Mutuo Masuda, Hiroyuki Hayashi
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Patent number: 7611642Abstract: The present invention provides an oxynitride phosphor represented by a composition formula M(1)1-jM(2)jSibAlcOdNe (composition formula I) or a composition formula M(1)1-a-jM(2)jCeaSibAlcOdNe (composition formula II) and containing 50% or more of a JEM phase, and a light emitting device including a semiconductor light emitting element emitting an excited light, a first phosphor that is the oxynitride phosphor according to the present invention that absorbs the excited light and emits a fluorescence, and a kind or a plurality of kinds of second phosphor(s) that absorb(s) the excited light and emit(s) a fluorescence having a longer wavelength than the fluorescence emitted by the first phosphor. Thereby, a novel oxynitride phosphor being capable of highly efficiently emitting mainly a light having a wavelength of 510 nm or less and a light emitting device using the same can be provided.Type: GrantFiled: June 6, 2007Date of Patent: November 3, 2009Assignees: Sharp Kabushiki Kaisha, National Institute for Materials ScienceInventors: Kohsei Takahashi, Naoto Hirosaki
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Patent number: 7611641Abstract: An illumination system includes a radiation source and a fluorescent material including at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light. The phosphor includes a yellow red-emitting cerium-activated carbido-nitridosilicate of general formula (RE1?z)2?aEAaSi4N6+aC1?a:Cez where 0?a<1, 0<z?0.2, EA is at least one earth alkaline metal selected from the group of calcium, strontium and barium, and RE is a least one rare earth metal chosen from the group of yttrium, gadolinium and lutetium. The phosphor may include a red to yellow-emitting cerium-activated carbido-nitridosilicate of general formula (RE1?z)2?aEAa Si4N6+aC1?a:Cez where 0?a<1, 0<z?0.2, EA is at least one earth alkaline metal selected from the group of calcium, strontium and barium, and RE is a least one rare earth metal chosen from the group of yttrium, gadolinium and lutetium.Type: GrantFiled: February 10, 2005Date of Patent: November 3, 2009Assignee: Koninklijke Philips Electronics N.V.Inventors: Peter J. Schmidt, Thomas Jüstel, Henning Höppe, Wolfgang Schnick
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Patent number: 7608202Abstract: There is provided a phosphor emitting light of high brightness and having high weatherability, which has a composition represented by the following general formula: (M11?yRy)aMgM2bM3cOa+2b+(3/2)cX2 wherein M1 is at least one element selected from the group consisting of Ca, Sr, Ba, Zn and Mn, M2 is at least one element selected from the group consisting of Si, Ge and Sn, M3 is at least one element selected from the group consisting of B, Al, Ga and In, X is at least one element selected from the group consisting of F, Cl, Br and I, R is at least one element selected from the group consisting of rare earth elements with Eu being an inevitable element, and y, a, b and c satisfy the following relationships of 0.0001?y?0.3, 7.0?a<10.0, 3.0?b<5.0 and 0?c<1.0.Type: GrantFiled: February 1, 2007Date of Patent: October 27, 2009Assignee: Nichia CorporationInventor: Yoshinori Murazaki
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Patent number: 7608200Abstract: An object of the present invention is to provide a high-efficiency red light emitting phosphor and white light emitting phosphor for using in a display or lighting which high-efficiently emits light in combination with a light source which emits light in the region from near-ultraviolet light to visible light. The present invention relates to a phosphor having a crystal phase having a specified chemical composition.Type: GrantFiled: January 14, 2005Date of Patent: October 27, 2009Assignee: Mitsubishi Chemical CorporationInventors: Takatoshi Seto, Naoto Kijima, Masahiko Yoshino, Masayoshi Mikami, Motoyuki Shigeiwa, Hiroyuki Imura
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Patent number: 7604752Abstract: A SrTiO3:Pr phosphor includes a SrTiO3:Pr phosphor material and an additive having one or more elements selected from the group consisting of W, Mo and V in a form of an elemental substance and/or a compound. A total amount of one or more elements included in the additive is in a range from 0.1 wt % to 30 wt % of the SrTiO3:Pr phosphor. The additive is WO3 and a particle size distribution of WO3 is such that a weight of WO3 whose particle diameters are in a range from 0.2 to 0.4 ?m is not less than 70% of a total weight of WO3. A fluorescent luminous tube includes the SrTiO3:Pr phosphor.Type: GrantFiled: January 25, 2006Date of Patent: October 20, 2009Assignee: Futaba CorporationInventors: Tomohiro Yamada, Masahiro Kato, Tadaomi Mori, Hitoshi Toki
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Patent number: 7601277Abstract: Disclosed is a fluorescent substance comprising an alkaline earth ortho-silicate, the fluorescent substance being activated by Eu2+, and further comprising at least one selected from the group consisting of La, Gd, Cs and K.Type: GrantFiled: January 31, 2008Date of Patent: October 13, 2009Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Naomi Shida, Masaaki Tamatani, Yoshihito Tsutsui, Kazuaki Ootsuka, Ryosuke Hiramatsu
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Patent number: 7601276Abstract: Novel two-phase yellow phosphors are disclosed having a peak emission intensity at wavelengths ranging from about 555 nm to about 580 nm when excited by a radiation source having a wavelength ranging from 220 nm to 530 nm. The present phosphors may be represented by the formula a[Srx(M1)1?x]zSiO4.(1-a)[Sry(M2)1?y]uSiO5:Eu2+D, wherein M1 and M2 are at least one of a divalent metal such as Ba, Mg, Ca, and Zn, the values of a, x, y, z and u follow the following relationships: 0.6?a?0.85; 0.3?x?0.6; 0.85?y?1; 1.5?z?2.5; 2.6?u?3.3; and Eu and D each range from 0.001 to about 0.5. D is an anion selected from the group consisting of F, Cl, Br, S, and N, and at least some of the D anion replaces oxygen in the host silicate lattice of the phosphor. The present yellow phosphors have applications in high brightness white LED illumination systems, LCD display panels, plasma display panels, and yellow LEDs and illumination systems.Type: GrantFiled: May 3, 2006Date of Patent: October 13, 2009Assignee: Intematix CorporationInventors: Yi-Qun Li, Yi Dong, Shifan Cheng, Dejie Tao, Ning Wang
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Patent number: 7597823Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu); contains the another elements.Type: GrantFiled: October 3, 2007Date of Patent: October 6, 2009Assignee: Nichia CorporationInventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
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Patent number: 7597822Abstract: A phosphor represented by a general formula: M1xM22?xSi2O6Raz . . . (1) wherein, M1 and M2 are alkaline earth metals, x<2, Ra is Ce or Eu and 0.005?z?0.05), and wherein a variation of y-value of CIE chromaticity relative to the quantity of charge applied per unit area is dy/dQ?0.0001 and the y-value of CIE chromaticity is y?0.080.Type: GrantFiled: April 23, 2007Date of Patent: October 6, 2009Assignee: Canon Kabushiki KaishaInventor: Shoshiro Saruta
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Patent number: 7597821Abstract: One preferred embodiment according to the present invention, there is provided an oxynitride phosphor and a light emitting device using the same that is able to reduce production costs and chromaticity shifts. The phosphor is represented by a general formula of (Ca1-zYz)x(Si, Al)12(O, N)16:Eu2+y, and has a main phase of substantially an alpha SiAlON crystal structure, wherein the value z is larger than 0 and smaller than 0.15.Type: GrantFiled: August 29, 2005Date of Patent: October 6, 2009Assignees: Fujikura Ltd., National Institute For Materials ScienceInventors: Ken Sakuma, Naoki Kimura, Naoto Hirosaki
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Patent number: 7575697Abstract: Novel green phosphors are disclosed having the comprise silicate-based compounds having the formula (Sr,A1)x(Si,A2)(O,A3)2+x:Eu2+, where A1 is at least one divalent cation (a 2+ ion) including Mg, Ca, Ba, or Zn, or a combination of 1+ and 3+ cations; A2 is a 3+, 4+, or 5+ cation, including at least one of B, Al, Ga, C, Ge, N, and P; A3 is a 1?, 2?, or 3? anion, including F, Cl, Br, and S; and x is any value between 1.5 and 2.5, both inclusive. The formula is written to indicate that the A1 cation replaces Sr; the A2 cation replaces Si, and the A3 anion replaces O. These green phosphors are configured to emit visible light having a peak emission wavelength greater than about 480 nm. They have applications in green illumination systems, red-green-blue backlighting systems, white LEDs, and plasma display panels (PDPs).Type: GrantFiled: November 8, 2005Date of Patent: August 18, 2009Assignee: Intematix CorporationInventors: Yi-Qun Li, Yi Dong, Dejie Tao, Shifan Cheng, Ning Wang
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Publication number: 20090200515Abstract: A nitridosilicate-based compound is produced by reacting an alkaline-earth metal compound capable of generating an alkaline-earth metal oxide by heating or a rare earth compound capable of generating a rare earth oxide by heating with at least a silicon compound, while the alkaline-earth metal compound or the rare earth compound is being reduced and nitrided by the reaction with carbon in an atmosphere of nitriding gas. Because of this, a nitridosilicate-based compound of high quality can be produced industrially at low cost.Type: ApplicationFiled: April 17, 2009Publication date: August 13, 2009Applicant: PANASONIC CORPORATIONInventor: Shozo OSHIO
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Patent number: 7572391Abstract: An field effect transistor includes a first semiconductor region, a gate electrode insulatively disposed over the first semiconductor region, source and drain electrodes between which the first semiconductor region is sandwiched, and second semiconductor regions each formed between the first semiconductor region and one of the source and drain electrodes, and having impurity concentration higher than that of the first semiconductor region, the source electrode being offset to the gate electrode in a direction in which the source electrode and the drain electrode are separated from each other with respect to a channel direction, and one of the second semiconductor regions having a thickness not more than a thickness with which the one of second semiconductor regions is completely depleted in the channel direction being in thermal equilibrium with the source electrode therewith.Type: GrantFiled: June 19, 2008Date of Patent: August 11, 2009Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., LtdInventors: Naomi Shida, Masaaki Tamatani, Yoshihito Tsutsui, Kazuaki Ootsuka, Ryosuke Hiramatsu
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Patent number: 7556744Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y-(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.Type: GrantFiled: October 3, 2007Date of Patent: July 7, 2009Assignee: Nichia CorporationInventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima
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Publication number: 20090166584Abstract: To provide a green phosphor with high conversion efficiency of blue of near-ultraviolet light and excellent color purity, a multinary oxynitride phosphor represented by the general formula [I] is proposed. M1xBayM2zLuOvNw??[I] In the formula [I], M1 represents Cr, Mn, Fe, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb, M2 represents Sr, Ca, Mg and Zn, L represents metal elements belonging to the fourth group or the fourteenth group of the periodic table, and x, y, z, u, v and w are the numeric values in the following ranges: 0.00001?x?3 0?y?2.99999 2.6?x+y+z?3 0<u?11 6<v?25 0<w?17.Type: ApplicationFiled: March 9, 2009Publication date: July 2, 2009Applicant: Mitsubishi Chemical CorporationInventors: Satoshi SHIMOOKA, Kyota Ueda, Masayoshi Mikami, Naoto Kijima, Hiroyuki Imura, Kentaro Horibe
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Patent number: 7550095Abstract: Phosphor from the class of the oxynitridosilicates, having a cation M which is doped with divalent europium, and having the empirical formula M(1-c)Si2O2N2:Dc, where M=Sr or M=Sr(1-x-y)BayCax with x+y<0.5, the oxynitridosilicate completely or predominantly comprising the high-temperature-stable modification HT.Type: GrantFiled: September 24, 2004Date of Patent: June 23, 2009Assignee: Patent-Treuhand-Gesellschaft für elektrische Glü hlampen mbHInventors: Tim Fiedler, Frank Jermann
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Patent number: 7544310Abstract: A green fluorescent substance of the invention is higher in luminance of green than a conventional rare-earth activated sialon fluorescent substance and more excellent in durability than a conventional oxide fluorescent substance. The fluorescent substance is obtained by solid-dissolving Eu into a nitride or oxy-nitride crystal having a ?-type Si3N4 crystal structure, and emits a fluorescent light having a peak within a range of 500 nm to 600 nm in wavelength by being irradiated with an excitation source.Type: GrantFiled: March 9, 2005Date of Patent: June 9, 2009Assignee: National Institute for Materials ScienceInventor: Naoto Hirosaki