Plural Patents (Class 313/487)
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Patent number: 8226853Abstract: 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: August 4, 2009Date of Patent: July 24, 2012Assignee: Panasonic CorporationInventor: Shozo Oshio
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Patent number: 8221649Abstract: 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: July 17, 2012Assignee: Panasonic CorporationInventor: Shozo Oshio
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Patent number: 8212464Abstract: This invention relates to a backlight unit of a liquid crystal display device using a cold cathode fluorescent lamp that is capable of realizing pure colors and having a broad color reproduction range. A backlight unit of a liquid crystal display device according to an embodiment of the present invention includes at least one lamp including a first red phosphor having a dominant wavelength of about 620 nm, a second red phosphor having a dominant wavelength of about 658 nm, a green phosphor having a dominant wavelength of about 515 nm and a blue phosphor having a dominant wavelength of about 447 nm; a bottom cover in which the lamp is disposed; and an optical member disposed on the lamp.Type: GrantFiled: October 3, 2007Date of Patent: July 3, 2012Assignee: LG Display Co., Ltd.Inventors: Sang Ho Han, Je Young Moon
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Patent number: 8206611Abstract: A phosphor which emits light having high brightness, serves as an excellent orange or red phosphor whose light brightness is less decreased when exposed to an excitation source contains a crystal phase having the chemical composition expressed by the general formula [1]: (1?a?b)(Ln?pMII?1?pMIII?MIV?N3).a(MIV?(3n+2)/4NnO).b(AMIV?2N3)??[1] wherein Ln? represents a metal element selected from the group consisting of lanthanoids, Mn, and Ti; MnII? represents a divalent metal element except the Ln? element; MIII? represents a trivalent metal element; MIV? represents a tetravalent metal element; A represents a metal element selected from the group consisting of Li, Na, and K; 0<p?0.2; 0?a, 0?b, a+b>0, 0?n, and 0.002?(3n+2)a/4?0.9.Type: GrantFiled: May 24, 2006Date of Patent: June 26, 2012Assignees: Mitsubishi Chemical Corporation, Independent Administrative Institution National Institute for Materials ScienceInventors: Naoto Hirosaki, Takatoshi Seto, Naoto Kijima
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Patent number: 8197712Abstract: 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: August 4, 2009Date of Patent: June 12, 2012Assignee: Panasonic CorporationInventor: Shozo Oshio
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Publication number: 20120126685Abstract: A low pressure discharge lamp comprises a phosphor composition configured to provide a total light emission having characteristics within specified parameters, including color point above or substantially on the Planckian locus in the CIE standard chromaticity diagram; CCT of from about 2500 kelvin to about 3600 kelvin; general color rendering index Ra(8) of at least about 80; and special color rendering index R?a(14) of from about 72 to about 87. These novel lamps result in incandescent-like color quality while also having favorable efficacy. Also disclosed are phosphor blends which enable the achievement of such lamps.Type: ApplicationFiled: November 23, 2010Publication date: May 24, 2012Inventors: Katalin TÓTH, Istváná Károly Deme
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Publication number: 20120098411Abstract: Disclosed herein are low pressure discharge lamps having enhanced chroma and color preference. improved color quality scale, especially at elevated color temperatures, is provided. The light generated by the light-emitting elements of the lamp, when the lamp is energized, has Color Preference Scale values, as well as delta chroma values for fifteen color samples of the Color Quality Scale, within select parameters.Type: ApplicationFiled: October 25, 2010Publication date: April 26, 2012Inventors: Katalin Tóth, István Károly Deme, Attila Kulcsár, Gáza István Szeghy
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Patent number: 8158025Abstract: A phosphor composition including a first phosphor represented by Formula 1: Ba1-bMg1-aAl10O17:Mna,Eub??(1). In Formula 1, a and b satisfy the relations: 0.05?a?0.4, and 0.006?b<0.05.Type: GrantFiled: February 4, 2009Date of Patent: April 17, 2012Assignee: Samsung SDI Co., Ltd.Inventors: Gyeong-Jae Heo, Mi-Ran Song, Young-Hun Lee, Yoon-Chang Kim, Yong-Chan You, Do-Hyung Park, Hyun-Deok Lee, Seon-Young Kwon, Ji-Hyun Kim, Ick-Kyu Choi, Ji-Hyun Kim, Yu-Mi Song, Jay-Hyok Song, Min-Ju Kim, Sun-Hwa Kwon, Young-Ki Kim
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Patent number: 8147717Abstract: A green emitting phosphor is provided, allowing the internal quantum efficiency to be increased. The green emitting phosphor comprises a mother crystal containing Sr, Ga and S, and a luminescent center, characterized in that, in an XRD pattern, the ratio of the diffraction intensity of the maximum peak appearing at diffraction angle 2?=14 to 20° over the diffraction intensity of the maximum peak appearing at diffraction angle 2?=21 to 27° is 0.4 or greater.Type: GrantFiled: January 7, 2009Date of Patent: April 3, 2012Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Riichi Ogawara, Asuka Sasakura, Jun-ichi Itoh, Taizou Morinaka
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Patent number: 8137585Abstract: The phosphor composition including a first phosphor represented by Formula 1: Y3?x?kCekM?xAla?yM?yO(1.5a+4.5)??(1). In Formula 1, M? includes at least one of Sc, In, and La, M? includes at least one of Ga, Sc, and In, and x, y, k, and a satisfy the relations: 0.0?x<3.0, 0.0<y?7.0, 0.0<k<0.1, 4.0?a?7.0, a?y?0.0, and x+k?3.0.Type: GrantFiled: February 4, 2009Date of Patent: March 20, 2012Assignee: Samsung SDI Co., Ltd.Inventors: Jay-Hyok Song, Yu-Mi Song, Yoon-Chang Kim, Do-Hyung Park, Yong-Chan You, Gyeong-Jae Heo, Ick-Kyu Choi, Mi-Ran Song, Seon-Young Kwon, Hyun-Deok Lee, Ji-Hyun Kim, Jin-Hyoung Seo, Sun-Hwa Kwon, Min-Ju Kim, Young-Hun Lee, Young-Ki Kim
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Patent number: 8128840Abstract: A phosphor composition for a display device, including a phosphor represented by Formula 1: Y3-x-k-zCekMzM?xAla-yM?yO(1.5a+4.5)??(1). In Formula 1, M includes at least one of Tb, Dy, and Eu, M? includes at least one of Sc, Gd, In, and La, M? includes at least one of Ga, Sc, and In, and x, y, z, k, and a represent molar ratios and satisfy the relations: 0.0?x<3.0, 0.0?y?7.0, 0.0<k<0.1, 0.0<z<0.5, 4.0?a?7.0, a-y?0.0, x+k+z?3.0, and 0.01?z/k?20.Type: GrantFiled: January 29, 2009Date of Patent: March 6, 2012Assignee: Samsung SDI Co., Ltd.Inventors: Jay-Hyok Song, Yu-Mi Song, Yoon-Chang Kim, Do-Hyung Park, Yong-Chan You, Gyeong-Jae Heo, Ick-Kyu Choi, Mi-Ran Song, Seon-Young Kwon, Hyun-Deok Lee, Ji-Hyun Kim, Jin-Hyoung Seo, Sun-Hwa Kwon, Ji-Hyun Kim, Min-Ju Kim, Young-Hun Lee, Young-Ki Kim
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Patent number: 8120239Abstract: A display device that includes an underlying excitation source, a converting layer, and an optical filter layer. The underlying excitation source emits light in a spatial pattern that may or may not be altered in time and has a short wavelength capable of being at least partially absorbed by the overlying converting layer. The converting layer can be a contiguous film or pixels of quantum dots that can be dispersed in a matrix material. This converting layer is capable of absorbing at least a portion of the wavelength(s) of the light from the underlying excitation source and emitting light at one or more different wavelengths. The optical filter layer prevents the residual light from the excitation source that was not absorbed by the converting layer from being emitted by the display device.Type: GrantFiled: March 13, 2008Date of Patent: February 21, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Kwang-Ohk Cheon, Michael Locascio, San Ming Yang
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Patent number: 8114311Abstract: A red phosphor, including a first phosphor represented by Formula 1 (Y1-x1Mx1)2-y1O3:Euy1??(1). In Formula 1, M includes at least one of Gd, La, Sc, and Lu, and x1 and y1 satisfy the relations: 0.00?x1?0.8 and 0.025?y1?0.20.Type: GrantFiled: January 29, 2009Date of Patent: February 14, 2012Assignee: Samsung SDI Co., Ltd.Inventors: Jay-Hyok Song, Ji-Hyun Kim, Ji-Hyun Kim, Hyun-Deok Lee, Seon-Young Kwon, Gyeong-Jae Heo, Do-Hyung Park, Yoon-Chang Kim, Yu-Mi Song
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Publication number: 20120032580Abstract: A phosphor blend is described wherein the blend consists of a red-emitting rare earth phosphor, a green-emitting rare earth phosphor, and a blue-emitting rare earth phosphor wherein the 50% size of the phosphors is between about 12 to 15 ?m. The phosphor blend is incorporated into a fluorescent lamp having an increased efficacy. A dual layer coating may be used to provide an additional increase in efficacy.Type: ApplicationFiled: April 27, 2010Publication date: February 9, 2012Applicant: OSRAM SYLVANIA INC.Inventors: Arunava Dutta, Paul Salvi, Carissa Mercer
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Patent number: 8088302Abstract: The present invention relates to a white light emitting device in which a thiogallate based phosphor capable of emitting green light and an alkaline earth metal sulfide based phosphor capable of emitting red light are arranged on an upper surface of a light emitting diode for emitting ultraviolet rays or blue light such that the mixing of the lights can result in white light with high brightness, and thus, excellent white light with high color purity and color reproducibility after color filtration.Type: GrantFiled: May 23, 2006Date of Patent: January 3, 2012Assignee: Seoul Semiconductor Co., Ltd.Inventors: Kyung Nam Kim, Sang Mi Park, Tomizo Matsuoka
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Publication number: 20110309738Abstract: An enhanced UV-emitting fluorescent lamp is described that provides a UV spectral emission for simultaneously tanning of the human skin and promotion of vitamin D production in the human body. The lamp contains a phosphor layer having a phosphor blend of three rare-earth-activated phosphors: SrB4O7:Eu, LaPO4:Ce and YPO4:Ce. Preferably, the phosphor blend comprises 25-27% SrB4O7:Eu, 23-26% LaPO4:Ce, and 47-52% YPO4:Ce by weight.Type: ApplicationFiled: December 20, 2010Publication date: December 22, 2011Inventors: Arunava Dutta, Nicolas Desbiens, Nathalie Camire
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Patent number: 8062549Abstract: To provide a phosphor for manufacturing an one chip type LED illumination, etc, by combining a near ultraviolet/ultraviolet LED and a blue LED, and having an excellent emission efficiency including luminance. The phosphor is given as a general composition formula expressed by MmAaBbOoNn:Z, (where 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 one or more kinds of elements acting as an activator.), satisfying a=(1+x)×m, b=(4?x)×m, o=x×m, n=(7?x)×m, 0?x?1, wherein when excited by light in a wavelength range from 300 nm to 500 nm, the phosphor has an emission spectrum with a peak wavelength in a range from 500 nm to 620 nm.Type: GrantFiled: July 14, 2006Date of Patent: November 22, 2011Assignee: Mitsubishi Chemical CorporationInventors: Akira Nagatomi, Kenji Sakane, Tomoya Yamada
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Patent number: 8057704Abstract: Disclosed are violet, blue, and green phosphors having excellent durability and high luminance. Specifically disclosed is a phosphor which contains a metal element M (M is at least one element selected from among Mn, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Tm and Yb) for constituting a metal ion, which is solid-solubilized in an AlON crystal, an AlON solid solution crystal or an inorganic crystal having the same crystal structure as AlON. The phosphor is capable of emitting fluorescence having a peak in the wavelength range from 300 nm to 700 nm. Also disclosed is a method for producing such a phosphor. Further disclosed are an illuminating device and an image display each containing such a phosphor.Type: GrantFiled: February 22, 2007Date of Patent: November 15, 2011Assignee: National Institute for Materials ScienceInventors: Rong-Jun Xie, Naoto Hirosaki
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Patent number: 8043529Abstract: 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: October 6, 2009Date of Patent: October 25, 2011Assignees: Samsung LED Co., Ltd., Samsung Electro-Mechanics Co., Ltd.Inventors: Shunichi Kubota, Young-sic Kim, Seoung-jae Im
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Patent number: 8044572Abstract: A light conversion structure ensuring good light transmission and less deterioration and capable of controlling light to a desired color tone and emitting a highly bright light, and a light-emitting device using the same. The light conversion structure is a light conversion structure including a layer formed of a ceramic composite, which absorbs a part of a first light to emit a second light and transmits a part of the first light, and a fluorescent layer for the control of color tone, which is formed on the surface of the ceramic composite and which absorbs a part of the first light or a part of the second light to emit a third light and transmits a part of the first light or a part of the second light, wherein the ceramic composite includes a solidified body where at least two or more metal oxide phases are formed continuously and three-dimensionally entangled with each other, and at least one metal oxide phase in the solidified body includes a metal element oxide capable of emitting fluorescence.Type: GrantFiled: December 13, 2005Date of Patent: October 25, 2011Assignee: Ube Industries, Ltd.Inventors: Shin-ichi Sakata, Atsuyuki Mitani, Itsuhiro Fujii
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Patent number: 8044566Abstract: A fluorescent lamp includes a lamp body, a fluorescent layer and a discharge electrode. The lamp body has a discharge space in which ultraviolet light is generated. The fluorescent layer is formed on an inner surface of the lamp body to change the ultraviolet light into visible light. The discharge electrode is on an end portion of the lamp body to apply a voltage to the discharge space. A ratio of intensities of the visible light at wavelengths of about 545 nm and about 516 nm is about 1.32:1 to about 1.71:1. Therefore, color reproducibility and luminance may be improved.Type: GrantFiled: September 19, 2008Date of Patent: October 25, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-Chin Lee, Seok-Hyun Nam, Seon-Bae Kim, Sang-Hyuck Yoon, Hyun-Jin Kim, Kyung-Min Kim, So-Jin Ryu, Min-Jeong Wang, Hee-Tae Kim
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Patent number: 8044569Abstract: A light emitting device includes a wavelength converting member for absorbing light emitted by an exciting light source and emitting light of a different wavelength. With a wavelength at which the light from the exciting light source has a maximum energy intensity denoted as a first wavelength, a wavelength at which the light from the wavelength converting member has a maximum energy intensity denoted as a second wavelength, a wavelength lying between the first and second wavelengths at which the light from the light emitting device has a minimum energy intensity denoted as a third wavelength, and 650 nm denoted as a fourth wavelength, then the light emitting device has an emission spectrum such that the proportion of the energy intensity at the first wavelength to the energy intensity at the third wavelength is in a range from 100:15 to 100:150, and the proportion of the energy intensity at the first wavelength to the energy intensity at the fourth wavelength is in a range from 100:45 to 100:200.Type: GrantFiled: June 15, 2006Date of Patent: October 25, 2011Assignee: Nichia CorporationInventors: Suguru Takashima, Masato Aihara, Junji Takeichi, Takahiro Naitou, Hiroto Tamaki, Tomohisa Kishimoto
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Patent number: 8035287Abstract: A light emitting system (1) comprising a radiation source (2) capable of emitting a first light of at least a first wavelength spectrum; a first fluorescent material (4) capable of absorbing at least partially the first light and emitting second light having a second wavelength spectrum; a second fluorescent material (8) capable of absorbing at least partially the first light and emitting a third light having a third wavelength spectrum; wherein one, the first (4) or the second fluorescent material (8) is a polycrystalline ceramic with a density of more than 97 percent of the density of a monocrystalline material and the respective other fluorescent material is a phosphor powder with a median particle size 100 nm<d50%<50 ?m.Type: GrantFiled: April 10, 2007Date of Patent: October 11, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Peter Schmidt, Hans-Helmut Bechtel, Wolfgang Busselt
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Publication number: 20110241534Abstract: The present invention provides a plasma display device that has light emission properties with short persistence where green light has a persistence time of 3.5 msec or less, that is excellent in luminance, luminance degradation resistance, and color tone, and that is suitable for, for example, a stereoscopic image display device.Type: ApplicationFiled: July 14, 2010Publication date: October 6, 2011Applicant: PANASONIC CORPORATIONInventors: Shozo Oshio, Kazuhiko Sugimoto, Nobumitsu Aibara, Yoshihisa Nagasaki, Yukihiko Sugio, Masaaki Akamatsu
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Patent number: 8021576Abstract: To provide a phosphor having nearly spherical shapes, the phosphor has an elemental ratio represented by the formula below, and contains at least two kinds of Li, Na, K, Rb, Cs, P, Cl, F, Br, I, Zn, Ga, Ge, In, Sn, Ag, Au, Pb, Cd, Bi and Ti. M1aM2bM3cOd (M1 represents Cr, Mn, Fe, Co, Ni, Cu, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm or Yb, M2 mainly represents a bivalent metal element, M3 mainly represents a trivalent metal element, and a, b, c and d are 0.0001?a?0.2, 0.8?b?1.2, 1.6?c?2.4 and 3.2?d?4.8, respectively.Type: GrantFiled: March 13, 2009Date of Patent: September 20, 2011Assignee: Mitsubishi Chemical CorporationInventors: Etsuo Shimizu, Kumie Shimizu, legal representative, Naoto Kijima, Yasuo Shimomura
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Publication number: 20110221329Abstract: A low-pressure discharge lamp having a discharge vessel which delimits a gas-tight fill chamber containing a filling gas, wherein the side of the discharge vessel facing the fill chamber is coated at least partially with a luminescent phosphor mixture by means of which electromagnetic radiation in the non-visible range can be transferred into the visible range. A low-pressure discharge lamp which is energy-saving and at the same time possesses good efficiency is provided in that primarily argon is used as the filling gas and that the average particle size of the luminescent phosphor mixture is greater than 5 m.Type: ApplicationFiled: October 29, 2009Publication date: September 15, 2011Inventors: Achim Hilscher, Armin Konrad
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Patent number: 8007684Abstract: The invention has for its object the provision of an oxynitride fluorescent material has higher emission luminance than conventional rare earth element-activated sialon fluorescent materials. To this end, an oxynitride fluorescent material is designed in such a way as comprising a JEM phase as a mother crystal and a luminescence center element M1. For instance, the luminescence center element M1 is at least one kind of an element selected from Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. And the JEM phase is expressed as a general formula MA1(Si6-zAlz) N10-zOz (where M indicates a metal element, 0.1?z?3).Type: GrantFiled: April 7, 2008Date of Patent: August 30, 2011Assignee: National Institute For Materials ScienceInventor: Naoto Hirosaki
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Patent number: 8004171Abstract: A plasma display panel including a front panel having a first substrate, a first electrode, a first dielectric layer and a protective layer wherein the first electrode is formed on the first substrate, the first dielectric layer is formed over the first substrate so as to cover the first electrode, and the protective layer is formed on the first dielectric layer, and a rear panel having a second substrate, a second electrode, a second dielectric layer and a phosphor layer wherein the second electrode is formed on the second substrate, the second dielectric layer is formed over the second substrate so as to cover the second electrode, the phosphor layer is formed on the second dielectric layer.Type: GrantFiled: May 9, 2008Date of Patent: August 23, 2011Assignee: Panasonic CorporationInventors: Hideki Yamashita, Hironobu Inoue, Motoi Hatanaka, Tomohiro Okumura
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Patent number: 7999456Abstract: Provided is a white light emitting diode (LED) including a blue LED chip; and yellow, green, and red light emitting phosphors that are coated on the blue LED chip at a predetermined mixing ratio and converts light, emitted from the blue LED chip, into white light.Type: GrantFiled: September 28, 2007Date of Patent: August 16, 2011Assignee: Samsung LED Co., Ltd.Inventors: Jong Rak Sohn, Chul Soo Yoon, Chang Hoon Kwak, Il Woo Park
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Patent number: 7990040Abstract: A fluorescent lamp including a phosphor layer including (Y1-x-yGdx)AlO3:EU3+y, wherein 0.4?x?0.7 and 0?y?0.1, and at least one of each of a green and blue emitting phosphor. The resulting lamp will exhibit a white light having a color rendering index of preferably 90 or higher with a correlated color temperature of from 2500 to 10000 Kelvin. The use of (Y1-x-yGdx)AlO3:Eu3+y in phosphor blends of lamps results in high CRI light sources with increased stability and acceptable lumen maintenance over, the course of the lamp life.Type: GrantFiled: June 11, 2008Date of Patent: August 2, 2011Assignee: General Electric CompanyInventors: Alok Srivastava, Holly Comanzo, Venkatesan Manivannan
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Patent number: 7985352Abstract: Provided are a phosphor used in a PDP, which is a compound represented by Formula 1 below and a PDP including a phosphor layer comprising the phosphor. (Y1-x-yGdxTby)AlrQ3-r(BO3)4 ??Formula 1 where 0<x?1, 0<y?1, Q is Sc, In, or Ga, and 0?r<3. When the phosphor is used to form a green phosphor layer of a PDP, the luminance saturation problem of a conventional green phosphor can be overcome. In addition, a PDP including a phosphor layer comprising the phosphor has a wider color reproduction range and no reduction in luminance according to the mixing ratio of each phosphor contained in the phosphor compared with a conventional phosphor used in a PDP. Therefore, a PDP including a phosphor layer comprising the phosphor can have far superior image qualities.Type: GrantFiled: February 13, 2008Date of Patent: July 26, 2011Assignee: Samsung SDI Co., Ltd.Inventors: Ji-Hyun Kim, Dong-Sik Zang, Young-Chul You, Ick-Kyu Choi, Mi-Ran Song, Hyun-Deok Lee, Yu-Mi Song
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Patent number: 7968005Abstract: The inventive white-light emitting diode is characterized in that it comprises a source emitting radiation whose wavelength band ranges from 370 to 420 nm, a first blue and red-light emitting phosphor of formula Ba3(1-x)Eu3xMg1-yMnySi2O8 (1), wherein 0 < x 0,3 and 0 < y 0,3 and a second green-light emitting phosphor. In another embodiment, said diode comprises the same source and a single phosphor whose chemical composition is Ba3(1-x)Eu3xMg1-yMnySi2O8, wherein 0 < x 0,3 et 0 < y 0,3 and which is embodied in the form of a mixture of at least Ba2SiO4, Ba2MgSi2O7 and Ba3MgSi2O8 phases. The inventive diode can be used for a lighting device.Type: GrantFiled: April 6, 2005Date of Patent: June 28, 2011Assignee: Rhodia ChimieInventors: Claude Ceintrey, Thierry Le-Mercier, Etienne Wortham
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Patent number: 7964112Abstract: A phosphor having a high brightness after being exposed to plasma and a phosphor paste containing the phosphor. The phosphor comprises a fluorescent substance A1 containing a compound represented by the following formula (I) and at least one activator selected from the group consisting of Eu and Mn, and a fluorescent substance B1 containing an aluminate; mM1O.nM2O.2M3O2??(I) [in the formula (I), M1 is at least two selected from the group consisting of Ca, Sr and Ba, or Ca alone or Ba alone; M2 is at least one selected from the group consisting of Mg and Zn; M3 is at least one selected from the group consisting of Si and Ge; 0.5?m?3.5; and 0.5?n?2.5].Type: GrantFiled: October 21, 2003Date of Patent: June 21, 2011Assignee: Sumitomo Chemical Company, LimitedInventors: Keiji Ono, Susumu Miyazaki
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Patent number: 7951307Abstract: An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.Type: GrantFiled: May 3, 2010Date of Patent: May 31, 2011Assignee: Nichia CorporationInventors: Hiroto Tamaki, Suguru Takashima, Masatoshi Kameshima, Takahiro Naitou
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Patent number: 7951306Abstract: An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.Type: GrantFiled: May 3, 2010Date of Patent: May 31, 2011Assignee: Nichia CorporationInventors: Hiroto Tamaki, Suguru Takashima, Masatoshi Kameshima, Takahiro Naitou
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Publication number: 20110121716Abstract: A green phosphor for a plasma display panel and a plasma display panel including the same, the green phosphor including a first phosphor of YAl5O12:Ce, and a second phosphor of Zn1-xMgx (Ga1-yAly)2O4:Mn, wherein 0?x<1, 0?y<1.Type: ApplicationFiled: August 27, 2010Publication date: May 26, 2011Inventors: Young-Gil Yoo, Young-Kwan Kim
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Patent number: 7939996Abstract: A display device (100) comprising a plurality of lighting units (101), each lighting unit comprising at least one light emitting diode (202) being provided with a fluorescent element (203) arranged to absorb at least part of the light emitted by said light emitting diode and emit light of a wavelength range different from that of the absorbed light is provided. The fluorescent element (203) comprises at least one phosphor being an europium(II)-activated halogeno-oxonitridosilicate of the general formula EaxSiyN2/3x+4/3y:EuzOaXb.Type: GrantFiled: November 14, 2006Date of Patent: May 10, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Klemens Brunner, Aldegonda Lucia Weijers, Hans-Peter Stormberg, Guido Henri Maria Van Tartwijk, Jean Paul Jacobs, Hans-Helmut Bechtel, Egbert Lenderink, Lingli Wang, Marco Van As, Erik Boonekamp, Martinus Petrus Joseph Peeters, Oscar Arturo Chao Pujol, Martijn Henri Richard Lankhorst, Teunis Willem Tukker, Cornelis Jojakim Jalink, Peter Alexander Duine
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Patent number: 7935273Abstract: This invention relates to a light emitting device based on a Xe or Xe/Ne excimer discharge, e.g. a full color display screen or a xenon excimer lamp, comprising a phosphor blend of a red-emitting Eu(III)-activated phosphor and an UVlight emitting phosphor. Full color plasma display panels (PDPs) according to the present invention comprising a phosphor blend of a red-emitting Eu(III)-activated phosphor and an UV-light emitting phosphor for the red pixels show an improved color point and a shorter decay time compared to the use of the respective single red emitting Eu(III) activated phosphor. Xenon excimer lamps for illumination purposes (e.g. for LCD backlighting or X-Ray image illumination) comprising a phosphor blend of a redemitting Eu(III) activated phosphor and an UV-light emitting phosphor show an improved color rendering. The invention is also related to a phosphor blend of a red-emitting Eu(III)-activated phosphor and an UV-light emitting phosphor.Type: GrantFiled: September 20, 2005Date of Patent: May 3, 2011Assignee: LG Electronics Inc.Inventors: Thomas Justel, Jan Broere, Jan Renier Marie Hochstenbach, Raymond Goertz
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Patent number: 7935947Abstract: A glass composition for ultraviolet light is provided. The glass composition for ultraviolet light contains Lu, Si, and O in an amount of 99.99 weight % or more in total. The glass composition contains Lu in an amount of 26% or more and 39% or less in cation percent and Si in an amount of 61% or more and 74% or less in cation percent.Type: GrantFiled: November 5, 2008Date of Patent: May 3, 2011Assignee: Canon Kabushiki KaishaInventors: Tomohiro Watanabe, Taihei Mukaide
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Patent number: 7931826Abstract: The invention provides a white light illumination device including an ultraviolet excitation light source and an ultraviolet excitable aluminosilicate phosphor. The ultraviolet excitable aluminosilicate phosphor has a formula as (M1-x,Rex)aAlbSicOd:D, wherein M is Mg, Ca, Sr, Ba or combination thereof. In addition, Re is Y, La, Pr, Nd, Eu, Gd, Tb, Ce, Dy, Yb, Er, Sc, Mn, Zn, Cu, Ni, Lu or combination thereof, while 0<a, b, c, d, 2a+3b+4c=2d, and 0?x?a. Furthermore, D is F, Cl, I, Br, OH, S or combinations thereof. The aluminosilicate phosphor emits blue or blue-green light under the excitation of ultraviolet light, and the aluminosilicate phosphor may further collocate with different color phosphors to provide a white light illumination device.Type: GrantFiled: December 17, 2007Date of Patent: April 26, 2011Assignee: Industrial Technology Research InstituteInventors: Teng-Ming Chen, Woan-Jen Yang, Yao-Tsung Yeh, Chien-Yueh Tung, Tien-Heng Huang, Fang-Ching Chang, Yung Chi Chen, Wei-Jen Liu
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Publication number: 20110084594Abstract: The invention provides a phosphor emitting UV and visible light, which may be collocated with other phosphors to provide a white light illumination device, composed of (M1-xREx)9M?(PO4)7 or M9(M?1-yRE?y)(PO4)7 , wherein M is Mg, Ca, Sr, Ba, Zn or combinations thereof, M? is Sc, Y, La, Gd, Al, Ga, In or combinations thereof, RE is Pr, Nd, Eu, Gd, Tb, Ce, Dy, Yb, Er, Sc, Mn, Zn or combinations thereof, RE? is Pr, Nd, Gd, Tb, Ce, Dy, Yb, Er, Bi or combinations thereof, 0.001?x?0.8, and 0.001?y<1.0.Type: ApplicationFiled: February 15, 2010Publication date: April 14, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Shian-Jy Wang, Shyue-Ming Jang, Yi-Chen Chiu, Wei-Jen Liu, Teng-Ming Chen, Chien-Hao Huang, Yao-Tsung Yeh
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Publication number: 20110084595Abstract: A plasma display panel enhancing an emission efficiency of a green phosphor layer by increasing an excitation efficiency of a green phosphor layer using visible light emitted from a dielectric layer or barrier ribs, the plasma display panel including a first substrate and a second substrate disposed to face the first substrate. A plurality of display electrodes are formed on the first substrate. A first dielectric layer is formed on the first substrate to cover the display electrodes. A plurality of address electrodes are formed on the second substrate in a direction crossing the display electrodes. A second dielectric layer is formed on the second substrate to cover the address electrodes. Barrier ribs are disposed in a space between the first dielectric layer and the second dielectric layer to form a plurality of discharge cells. The second dielectric layer and the barrier ribs comprise a short wavelength phosphor material.Type: ApplicationFiled: August 31, 2010Publication date: April 14, 2011Inventors: Younggil Yoo, Bohoon Kim
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Patent number: 7923911Abstract: Metal induced polycrystallized silicon is used as the anode in a light emitting device, such as an OLED or AMOLED. The polycrystallized silicon is sufficiently non-absorptive, transparent and made sufficiently conductive for this purpose. A thin film transistor can be formed onto the polycrystallized silicon anode, with the silicon anode acting as the drain of the thin film transistor, thereby simplifying production.Type: GrantFiled: December 19, 2008Date of Patent: April 12, 2011Assignee: The Hong Kong University of Science and TechnologyInventors: Hoi Sing Kwok, Man Wong, Zhiguo Meng, Jiaxin Sun, Xiuling Zhu
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Patent number: 7906041Abstract: 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: August 17, 2009Date of Patent: March 15, 2011Assignee: Intematix CorporationInventors: Yi-Qun Li, Yi Dong, Dejie Tao, Shifan Cheng, Ning Wang
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Publication number: 20110050086Abstract: The invention provides a phosphor composed of (M1?xREx)5SiO4?yX6+2y, wherein M is Ba individually or in combination with at least one of Mg, Ca, Sr, or Zn; RE is Y, La, Pr, Nd, Eu, Gd, Tb, Ce, Dy, Yb, Er, Sc, Mn, Zn, Cu, Ni, or Lu; X is F, Cl, Br, or combinations thereof; 0.001?x?0.6, and 0.001?y?1.5. Under excitation, the phosphor of the invention emits visible light and may be collocated with other phosphors to provide a white light illumination device.Type: ApplicationFiled: December 28, 2009Publication date: March 3, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Wei-Jen Liu, Yi-Chen Chiu, Yao-Tsung Yeh, Shyue-Ming Jang, Teng-Ming Chen, Jen-Chuen Liao, Li-Ching Chuo, Fang-Yi Su
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Patent number: 7887718Abstract: To provide a phosphor having an emission spectrum with a broad peak in a range from green color to yellow color, having a broad and flat excitation band capable of using lights of broad range from near ultraviolet/ultraviolet to blue lights as excitation lights, and having excellent emission efficiency and luminance. The problem is solved by providing the phosphor expressed by a general composition formula MmAaBbOoNn:Z (where 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 one or more kinds of elements acting as the activator), satisfying 4.0<(a+b)/m<7.0, a/m=0.5, b/a>2.5, n>o, n=2/3m+a+4/3b?2/3o, and having an emission spectrum with a peak wavelength of 500 nm to 650 nm when excited by light in a wavelength range from 300 nm to 500 nm.Type: GrantFiled: March 3, 2006Date of Patent: February 15, 2011Assignee: DOWA Electronics Materials Co., Ltd.Inventors: Akira Nagatomi, Kenji Sakane
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Publication number: 20110025187Abstract: The invention relates to a low-pressure gas-discharge lamp which, with its light in the red spectral region, influences the biological circadian rhythm by controlling melatonin secretion. The tubular glass discharge vessel, which can also be in the shape of a double helix, is filled with a noble gas or noble-gas mixture and mercury. Electrodes for the supply of energy are arranged at both ends of the discharge vessel. The discharge vessel is multicoated on the inside by phosphor layers applied one after the other. The first phosphor layer located on the glass surface consists of phosphor which is excited both by ultraviolet mercury radiation between 180 nm and 400 nm and also by the blue radiation between 400 nm and 490 nm emitted by the mercury discharge, and by the visible radiation emitted by the second or further phosphor layers between 400 nm and 550 nm, where visible light having emission maxima in the region between 500 nm and 650 nm is generated.Type: ApplicationFiled: March 13, 2009Publication date: February 3, 2011Applicants: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG, NARVA LICHTQUEQUELLEN GMBH + CO. KGInventors: Walter Tews, Gundula Roth, Juergen Meltke, Hans Juergen Walther
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Patent number: 7871542Abstract: A plasma display device comprising phosphor layer wherein the phosphor layer comprises blue-emission divalent europium activated alkaline earth silicate phosphor which is represented by the following compositional formula (Ae)3-x(Ae?)Si2O8:Eux, wherein x satisfies 0.01?x?0.1, Ae is at least one alkaline earth element selected from the group consisting of Sr, Ca, and Ba, and Ae? is at least one element selected from the group consisting of Zn or (Zn plus Mg).Type: GrantFiled: September 26, 2006Date of Patent: January 18, 2011Assignee: Hitachi, Ltd.Inventors: Masatoshi Shiiki, Teruki Suzuki, Choichiro Okazaki
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Patent number: 7859183Abstract: A flat-type fluorescent lamp includes upper and lower glass substrates facing each other; a spacer glass having a zigzag shape between the upper and lower glass substrates for providing a plurality of discharge areas; first and second electrode parts at ends of the upper and lower glass substrates along a longitudinal direction thereof; first and second reflective sheets respectively formed on upper and lower surfaces of the spacer glass; and a plurality of first fluorescent substances formed on the upper glass substrate and a plurality of second fluorescent substances formed on the lower glass substrate.Type: GrantFiled: June 22, 2005Date of Patent: December 28, 2010Assignee: LG Display Co., Ltd.Inventor: Young Mi Kim
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Patent number: 7851812Abstract: An electronic device according to the invention includes a housing, a recess containing an optoelectronic component, and a film including a polyimide, which is over the recess covering the optoelectronic component.Type: GrantFiled: February 23, 2007Date of Patent: December 14, 2010Assignee: Osram Opto Semiconductors GmbHInventors: Martin Rudolf Behringer, Harald Feltges, Thomas Hoefer, Frank Moellmer