Including Particular Phosphor Patents (Class 313/486)
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Patent number: 8012371Abstract: The invention relates to a luminescent material comprising a luminescent particle (20) for generating light (4), wherein the luminescent particle (20) has a structured particle surface for effectively outcoupling the light (4) generated within the luminescent particle (20). Furthermore, the invention relates to a light source comprising a luminescent material according to the invention and a device for exciting the luminescent material.Type: GrantFiled: August 14, 2006Date of Patent: September 6, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Peter J. Schmidt, Thomas Juestel, Walter Mayr
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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: 8007683Abstract: The invention relates to a luminescent substance consisting of a doped host lattice which absorbs at least one part of exciting radiation when it is excited by a high-energy radiation, thereby releasing an energy-poor emission radiation. The host lattice is embodied in the form of a carbidonitridosilicate-based compound. An illuminant which is used for producing white light and comprises a light emitting element and said luminescent substance are also disclosed.Type: GrantFiled: August 29, 2006Date of Patent: August 30, 2011Assignees: Leuchtstoffwerk Breitungen GmbH, Triodonic.atco Optoelectronics GmbHInventors: Detlef Starick, Sven Rösler, Sylke Rösler, Hubertus Thoresia Hintzen, Yuan Qiang Li
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Patent number: 8002413Abstract: There is provided a light source unit which includes a luminescent light source which receives excitation light so as to emit light of a predetermined wavelength band, excitation light sources which shine excitation light on to the luminescent light source, a reflection space having the luminescent light source in an interior thereof and an emission space which emits luminescent light source light emitted from the reflection space from an emission port whose area is made smaller than the area of the luminescent light source and a projector which employs the light source unit.Type: GrantFiled: April 22, 2009Date of Patent: August 23, 2011Assignee: Casio Computer Co., Ltd.Inventor: Tetsuro Narikawa
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Patent number: 8004170Abstract: A low pressure fluorescent tanning lamp (10) includes an elongated, tubular glass envelope (12) including an arc generating and sustaining medium (14) and electrodes (16) therewithin and having a first section (18) and a second section (20). A phosphor coating (22) is provided on the interior of the first section (18) and only a portion (24) of the second section (20). The phosphor coating comprises materials emitting in the UVA and UVB areas of the electromagnetic spectrum and additionally in the visible area of the electromagnetic spectrum in the range above 600 nm. The second section (20) includes a clear window (26) and the phosphor comprises a mixture comprising about 91% BaSi2O5:Pb; about 6% MgSrAl10O17:Ce; and about 3% Y2O3:Eu.Type: GrantFiled: August 28, 2008Date of Patent: August 23, 2011Inventors: Steven C. Schlitt, Pascal Horion, Alain Richer
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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: 7998364Abstract: The invention relates to an ultraviolet to green light region silicate phosphor capable of being excited by radiation light source and its manufacturing method, particularly to white and multicolor systems light-emitting device. The material has luminous color in the range from blue to red color system. The essential composition of the phosphor is aMO.bM?O.SiO2.cR:xEu.yLn.zLv.?Lm, wherein M is an element or a combination of elements selected from the group consisting of Sr, Ca, Ba and Zn; M? is an element or a combination of elements selected from the group consisting of Mg, Cd and Be; R is one or two of B2O3 and P2O5; Ln is an element or a combination of elements selected from the group consisting of Nd, Dy, Ho, Tm, La, Ce, Er, Pr, Bi, Sm, Sn, Y, Lu, Ga, Sb, Tb, Mn and Pb; Lv is an element or a combination of elements selected from the group consisting of Cl, F, Br, I and S; Lm is an element or a combination of elements selected from the group consisting of Li, Na and K.Type: GrantFiled: May 29, 2007Date of Patent: August 16, 2011Assignee: Dalian Luminglight Science and Technology Co., Ltd.Inventors: Wei Xia, Jing Xu, Guangxu Lin, Xifeng Wang, Zhiguo Xiao
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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: 7990066Abstract: A plasma display panel and a plasma display apparatus are disclosed. The plasma display panel includes a front substrate, a rear substrate positioned to be opposite to the front substrate, a barrier rib positioned between the front substrate and the rear substrate to partition a discharge cell, and a phosphor layer positioned inside the discharge cell. The phosphor layer includes a first phosphor layer emitting red light, a second phosphor layer emitting blue light, and a third phosphor layer emitting green light. The first phosphor layer includes a red pigment. At least one of the first phosphor layer, the second phosphor layer or the third phosphor layer includes magnesium oxide (MgO) material.Type: GrantFiled: October 31, 2007Date of Patent: August 2, 2011Assignee: LG Electronics Inc.Inventors: Heekwon Kim, Suho Bae, Jongjin Jeong, Sangsub Ha
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Patent number: 7981321Abstract: An illumination system, comprising a radiation source and a luminescent material comprising a phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of a wavelength different from that of the absorbed light; wherein said phosphor is a europium-activated oxonitridoalumosilicate of general formula AE1?y?zLnySi3-xAlx?aBa O1+x?yN4?x+y:Euz, wherein AE is an alkaline earth metal selected from the group of Sr, Ca, Ba, Mg and Zn; Ln is a lanthanide metal selected from the group of La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y; B is a trivalent metal selected from the group of boron, gallium and scandium and a 0?a<2, 0?x<2, 0?y?1, 0.001<z?0.1 provides white or colored illumination with high efficacy.Type: GrantFiled: June 28, 2006Date of Patent: July 19, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Peter Schmidt, Volker Bachmann
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Patent number: 7969083Abstract: A discharge lamp is disclosed, including a sealed vessel with an inner surface, at least one illuminating gas filled inside the sealed vessel, and a fluorescent layer coated on the inner surface. The composition of the fluorescent layer is adjusted according to a colored light emitted by the illuminating gas during a discharge process within the sealed vessel, such that the colored light is converted into a visible light after passing through the fluorescent layer.Type: GrantFiled: January 5, 2009Date of Patent: June 28, 2011Assignee: Wellypower Optronics CorporationInventors: Tjong-Ren Chang, Jin-Yuh Lu, Wen-Chun Chiu, Wei-Yuan Tsou
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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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Patent number: 7948046Abstract: An optoelectronic component having a basic housing or frame and at least one semiconductor chip, specifically a radiation-emitting or-receiving semiconductor chip, in a cavity of the basic housing. In order to increase the efficiency of the optoelectronic component, reflectors are provided in the cavity in the region around the semiconductor chip. These reflectors are formed by virtue of the fact that a filling compound filled at least partly into the cavity is provided, the material and the quantity of the filling compound being chosen in such a way that the filling compound, on account of the adhesion force between the filling compound and the basic housing, assumes a form which widens essentially conically from bottom to top in the cavity, and the conical inner areas of the filling compound serve as reflector.Type: GrantFiled: September 10, 2010Date of Patent: May 24, 2011Assignee: OSRAM Opto Semiconductor GmbHInventors: Marcus Ruhnau, Bert Braune, Patrick Kromotis, Georg Bogner
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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: 7938983Abstract: The invention concerns an illumination system for generation of colored, especially amber or red light, comprising a radiation source and a fluorescent material comprising 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; wherein said at least one phosphor is a amber to red emitting a rare earth metal-activated oxonitridoalumosilicate of general formula (Ca1?x?y?zSrxBayMgz)1?n(Al1?a+bBa)Si1?bN3?bOb:REn, wherein 0?x?1, 0?y?1, 0?z?1, 0?a?1, 0<b?1 and 0.002?n?0.2 and RE is selected from europium(II) and cerium(III).Type: GrantFiled: March 8, 2006Date of Patent: May 10, 2011Assignees: Koninklijke Philips Electronics N.V., Philips Lumileds Lighting Company, LLCInventors: Regina Mueller-Mach, Gerd Mueller, Jörg Meyer, Peter J. Schmidt, Walter Mayr, Hans-Dieter Bausen
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Patent number: 7938551Abstract: 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: June 3, 2010Date of Patent: May 10, 2011Assignees: Japan Science and Technology Agency, National Institute of Advanced Industrial Science and TechnologyInventors: Danping Chen, Tomoko Akai
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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: 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: 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: 20110068678Abstract: The present invention relates to a fluorescent lamp including: a discharge space containing a discharge gas and being surrounded by a glass; a discharge electrode; a phosphor; and a mayenite type compound provided on at least a part of an inner surface contacting the discharge gas. According to the fluorescent lamp of the present invention, a fluorescent lamp that has good luminous efficiency of ultraviolet ray from a discharge gas, has good discharge characteristics such as discharge starting voltage and discharge sustaining voltage in a fluorescent lamp, is chemically stable, has excellent oxidation resistance, has excellent sputtering resistance, and can achieve electric power saving is provided.Type: ApplicationFiled: November 30, 2010Publication date: March 24, 2011Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Satoru WATANABE, Kazuhiro Itoh, Naomichi Miyakawa, Kazunari Watanabe, Setsuro Ito
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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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Patent number: 7902564Abstract: A ceramic body is disposed in a path of light emitted by a light source. The light source may include a semiconductor structure comprising a light emitting region disposed between an n-type region and a p-type region. The ceramic body includes a plurality of first grains configured to absorb light emitted by the light source and emit light of a different wavelength, and a plurality of second grains. For example, the first grains may be grains of luminescent material and the second grains may be grains of a luminescent material host matrix without activating dopant.Type: GrantFiled: December 22, 2006Date of Patent: March 8, 2011Assignees: Koninklijke Philips Electronics N.V., Philips Lumileds Lighting Company, LLCInventors: Regina B. Mueller-Mach, Gerd O. Mueller, Michael R. Krames, Peter J. Schmidt, Hans-Helmut Bechtel
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Patent number: 7902756Abstract: The present invention is a blue phosphor that is represented by a general formula xSrO.yEuO.MgO.zSiO2, where 2.970?x?3.500, 0.006?y?0.030, and 1.900?z?2.100. This blue phosphor has a crystal structure that is essentially a merwinite structure, and the crystal structure has a unit cell volume of 714.8 ?3 or less. Or, in this blue phosphor, a peak appearing around 2?=22.86 degrees in an X-ray diffraction pattern obtained by measurement of the blue phosphor using an X-ray with a wavelength of 0.773 ? has a one-fifth value width of 0.17 degrees or less. Furthermore, the present invention is a light-emitting device having a phosphor layer including the phosphor. A suitable example of the light-emitting device is a plasma display panel.Type: GrantFiled: February 7, 2007Date of Patent: March 8, 2011Assignee: Panasonic CorporationInventors: Masahiro Sakai, Seigo Shiraishi, Takehiro Zukawa, Kojiro Okuyama
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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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Patent number: 7884535Abstract: A low-pressure gas discharge lamp includes a gas discharge vessel having a gas filling with a discharge-maintaining composition. At least part of a wall of the discharge vessel is provided with a luminescent material including a first UV-B phosphor containing, in a host lattice, gadolinium(III) as an activator and praseodymium(III) as a sensitizer.Type: GrantFiled: June 10, 2005Date of Patent: February 8, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Thomas Juestel, Walter Mayr, Olaf Mastenbroek
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Patent number: 7855497Abstract: A dielectric barrier Xe discharge lamp include discharge vessel with a gas filling containing Xe or a Xe/Ne mixture and a luminescent layer of a UV-B phosphor emitting in the UV-B range 280 to 320 nm. The luminescent layer includes a Gd3+ activated phosphor according to at least one the formulas of (Y1-x-yGdxSy)Al3(BO3)4, (La1-x-yGdxSy)Al3(BO3)4, (La1-x-yGdxSy)B3O6, (Y1-x-y-zGdxSyLuz)PO4, (Y1-x-y-zGdxSyLuz)BO3, (Y1-x-y-zGdxSyLuz)3Al5O12, Me(Y1-x-yGdxSy)F4 (Me=Li, Na, K; S?Bi, Nd, Pr; 0.0<x,z?1.0; 0.0<y?0.1) or a mixture thereof. The luminescent layer may be sensitized by Bi3+, Pr3+ or Nd3+.Type: GrantFiled: April 19, 2005Date of Patent: December 21, 2010Assignee: Koninklijke Philips Electronics N.V.Inventors: Thomas Juestel, Petra Huppertz, Detlef Uwe Wiechert, Walter Mayr, Heinrich Von Busch
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Patent number: 7846351Abstract: This invention provides a blue phosphor, which has higher blue brightness and larger half-value width in an emission spectrum as compared with the conventional rare earth-activated sialon phosphor and has better durability as compared with the conventional oxide phosphor. The phosphor comprises a metal element M, wherein M represents Ce, dissolved as a solid solute in a nitride or oxynitride crystal having a ?-type Si3N4 crystal structure, an AlN crystal structure, or an AlN polytype structure, and emits fluorescence having a peak in a wavelength region of 450 nm to 500 nm upon exposure to light from an excitation source.Type: GrantFiled: March 20, 2006Date of Patent: December 7, 2010Inventor: Naoto Hirosaki
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Patent number: 7834533Abstract: A T8 fluorescent lamp can comprise a light-transmissive glass envelope, means for providing an electrical discharge to the glass envelope, a phosphor layer within the glass envelope and a discharge-sustaining fill gas inside the glass envelope. The phosphor layer can comprise phosphors of a type for producing a daylight lighting spectrum or of a type for producing a tungsten/halogen lighting spectrum. The fill gas can comprise a mixture of argon and neon. In a particular mode of operation, the T8 lamp can operate at a power of at least 45 watts. In another mode of operation, the T8 fluorescent lamp can operate at a power of approximately 70 watts. A lighting fixture can comprise an array of such T8 fluorescent lamps arranged substantially side-to-side on longitudinal centerlines that are less than one and one-half inches apart. In a particular instance, the fixture can have been retrofitted from having been outfitted to accommodate T12 lamps.Type: GrantFiled: February 27, 2008Date of Patent: November 16, 2010Assignee: General Electric CompanyInventor: Jon B. Jansma
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Patent number: 7825580Abstract: A fluorophor comprising, as a main component, an ?-type sialon crystal which contains at least an A element (wherein A represents one or more elements selected from among Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm and Yb), an M element (wherein M represents one or more elements selected from among Li, Na, Mg, Ca, Y, La, Gd and Lu), Si, Al, oxygen and nitrogen, and is represented by the general formula: (Mx, Ay)(Si12?(m+n)Alm+n)(OnN16?n) (1) m=?M×x+?A×y (2) 0.2?x?2.4 (3) 0.001?y?0.4 (4) and 0.5×m<n?4 (5). The fluorophor is reduced in the lowering of brightness, and is useful for a white color LED and the like.Type: GrantFiled: June 28, 2006Date of Patent: November 2, 2010Assignee: National Institute for Materials ScienceInventors: Naoto Hirosaki, Rong-Jun Xie, Mamoru Mitomo
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Patent number: 7825574Abstract: The illumination system makes simultaneous use of the color-mixing principle from blue, green and red (RGB mixing) and the principle of converting of a primary radiation emitted by an LED into light with a longer wavelength by a phosphor which absorbs this radiation, with at least two LEDs being used, of which a first LED emits primarily in the range from 340 to 470 nm (dominant wavelength) and a second LED emits in the red region at 600 to 700 nm (dominant wavelength), wherein the green component is produced by the primary radiation of the first LED being at least partially converted by a green-emitting phosphor, the green-emitting phosphor used being a phosphor from the class of the oxynitridosilicates, having a cation M and the empirical formula M(1?c)Si2O2N2:Dc, M comprising Sr as a constituent and D being doped with divalent europium, where M=Sr or M=Sr(1?x?y)BayCax with x+y<0.5 is used, the oxynitridosilicate completely or predominantly comprising the high-temperature-stable modification HT.Type: GrantFiled: September 24, 2004Date of Patent: November 2, 2010Assignees: OSRAM Gesellschaft mit beschränkter Haftung, Osram Opto Semiconductors GmbHInventors: Herbert Brunner, Tim Fiedler, Frank Jermann, Martin Zachau
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Publication number: 20100270909Abstract: A luminophore consisting of the BAM system as a host lattice, having the stoichiometry MxEu1?xMg1?y+dMnyAl10+2fO17+d+3f, is provided, wherein 0.2?x?0.48; 0?y?0.3; 0?d?0.1; ?0.1?f?1.0.Type: ApplicationFiled: November 17, 2008Publication date: October 28, 2010Applicant: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNGInventors: Renate Hirrle, Guenter Huber, Frank Jermann, Martin Zachau
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Patent number: 7821196Abstract: An illumination device with at least one LED as the light source, the LED emitting primary radiation in the range from 370 to 430 nm of the optical spectral region (peak wavelength), this radiation being partially or completely converted into radiation of a longer wavelength by three phosphors which are exposed to the primary radiation from the LED and which emit in the blue, green and red spectral regions, so that white light is formed. The conversion is achieved at least with the aid of a phosphor which emits blue light with a wavelength maximum at 440 to 485 nm, and with the aid of a phosphor which emits green light with a wavelength maximum at 505 to 550 nm, and with the aid of a phosphor which emits red light with a wavelength maximum at 560 to 670 nm.Type: GrantFiled: March 20, 2007Date of Patent: October 26, 2010Assignees: OSRAM Gesellschaft mit beschränkter Haftung, OSRAM Opto Semiconductors GmbHInventors: Dieter Bokor, Andries Ellens, Günter Huber, Frank Jermann, Manfred Kobusch, Michael Ostertag, Wolfgang Rossner, Franz Zwaschka
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Patent number: 7817147Abstract: A display device having a plurality of power supplies and a method for controlling the same are provided. A large-screen display device can be embodied using a plurality of small-capacity power supplies. The operating states of the power supplies are monitored so that the user can immediately deal with abnormal operations of the power supplies. The display device includes a Plasma Display Panel (PDP) module including a plurality of boards that are grouped into at least two groups, at least two power supplies corresponding to the at least two groups and supplying power to the grouped boards, and a controller. Upon receiving a power-on command, the controller controls the at least two power supplies to be activated and controls them to supply power to the grouped boards in the PDP module.Type: GrantFiled: March 23, 2006Date of Patent: October 19, 2010Assignee: LG Electronics Inc.Inventor: Mog Sang Lee
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Patent number: 7816862Abstract: To provide an electroluminescent device excellent in color rendition, the electroluminescent device has at least two luminescent local maxima in a visible range, the at least two luminescent local maxima including a first luminescent local maximum and a second luminescent local maximum, the first and second luminescent local maxima have the two largest values of the at least two luminescent local maxima, wherein the electroluminescent device has the first luminescent local maximum in a range of from 450 to 530 nm, and the electroluminescent device has the second local luminescent local maximum in a range of 605 nm or more.Type: GrantFiled: March 17, 2005Date of Patent: October 19, 2010Assignee: FUJIFILM CorporationInventors: Takafumi Noguchi, Kazuhiro Hasegawa, Tadanobu Sato
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Patent number: 7808170Abstract: A device for generating ultraviolet radiation by an excimer discharge includes at least partly UV-transparent discharge vessel whose discharge space is filled with a gas filling. The device further includes electrodes for triggering and maintaining an excimer discharge in the discharge space, and a luminescent material that contains a phosphor comprising a host lattice of general formula (Y1-x-y-z,Lux,Scy,Az)PO4 wherein 0?x<1 and 0<y?1 and 0?z<0.05, where A is an activator selected from the group of bismuth, praseodymium and neodymium.Type: GrantFiled: April 11, 2006Date of Patent: October 5, 2010Assignee: Koninklijke Philips Electronics, N.V.Inventors: Thomas Justel, Jorg Meyer, Walter Mayr
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Publication number: 20100237764Abstract: The blue phosphor of the present invention includes ZrO2 and a metal aluminate that is represented by the general formula aBaO.bSrO.(1?a?b)EuO.cMgO.dAlO3/2.eWO3, where 0.70?a?0.95, 0?b?0.15, 0.95?c?1.15, 9.00?d?11.00, 0.001?e?0.200, and a+b?0.97 are satisfied. This blue phosphor has a ZrO2 content of 0.01 to 1.00% by weight. In the blue phosphor of the present invention, two peaks whose tops are located in a range of diffraction angle 2?=13.0 to 13.6 degrees are present in an X-ray diffraction pattern obtained by measurement on the blue phosphor using an X-ray with a wavelength of 0.774 ?.Type: ApplicationFiled: July 3, 2009Publication date: September 23, 2010Applicant: PANASONIC CORPORATIONInventors: Kojiro Okuyama, Yayoi Okui, Seigo Shiraishi
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Publication number: 20100237765Abstract: The blue phosphor of the present invention is represented by the general formula aBaO.bSrO.(1?a?b)EuO.cMgO.dAlO3/2.eWO3, where 0.70?a?0.95, 0?b?0.15, 0.95?c?1.15, 9.00?d?11.00, 0.001?e?0.200, and a+b?0.97 are satisfied. In the blue phosphor of the present invention, two peaks whose tops are located in a range of diffraction angle 2?=13.0 to 13.6 degrees and one peak whose top is located in a range of diffraction angle 2?=14.6 to 14.8 degrees are present in an X-ray diffraction pattern obtained by measurement on the blue phosphor using an X-ray with a wavelength of 0.774 ?.Type: ApplicationFiled: July 3, 2009Publication date: September 23, 2010Applicant: PANASONIC CORPORATIONInventors: Kojiro Okuyama, Yayoi Okui, Seigo Shiraishi
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Patent number: 7800712Abstract: A cold cathode fluorescent lamp includes a tube having an inner surface coated with a fluorescent film and tubular discharge electrodes disposed at both inner ends of the tube. Each discharge electrode has an opening facing a discharge area and includes a projection in the opening, the area of the projection being reduced by electric discharge.Type: GrantFiled: February 25, 2008Date of Patent: September 21, 2010Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.Inventors: Toshio Suzuki, Toshifumi Komiya, Satoshi Muto, Reiji Torai
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Publication number: 20100225224Abstract: A fluorescent material is provided. The fluorescent material is expressed as: A3D1-X(PO4)3:CeX, wherein, 0<X?0.5, “A” is selected from Be, Mg, Ca, Sr, Ba, Zn or a combination thereof, and “D” is selected from La, Gd, Y, Sc, Lu, Nd, B, Al, Ga, In or a combination thereof.Type: ApplicationFiled: September 28, 2009Publication date: September 9, 2010Applicant: LITE-ON IT CORPORATIONInventors: Te-Wen KUO, Teng-Ming Chen
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Patent number: 7791261Abstract: An ultraviolet excited light-emitting device is disclosed. The ultraviolet excited light-emitting device comprises a phosphor having at least one selected from the group consisting of Eu and Mn as an activator and a compound represented by a formula (1): M1M2M23O6??(1) wherein M1 is at least two selected from the group consisting of Ca, Sr and Ba, or Sr or Ba, M2 is at least one selected from the group consisting of Mg and Zn, and M3 is at least one selected from the group consisting of Si and Ge in the formula (1).Type: GrantFiled: June 3, 2004Date of Patent: September 7, 2010Assignee: Sumitomo Chemical Company, LimitedInventors: Toshinori Isobe, Takashi Kunimoto, Susumu Miyazaki
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Publication number: 20100219742Abstract: A method of preparing a halophosphate phosphor represented by Formula 1, the method comprising: mixing a metallic precursor compound, which comprises strontium pyrophosphate, strontium chloride and strontium carbonate, and an activator precursor compound to form a mixture; sintering the mixture under an oxygen or air atmosphere to form a sintered mixture; milling the sintered mixture to form a milled product, and sintering the milled product under a reducing atmosphere: (Sr5?(x+y)AxM?y)(PO4)3Cl.(M2O3)z??Formula 1 wherein A is barium or calcium, M? is an activator and comprises at least one cation selected from the group consisting of Eu2+, Mn2+, Sb2+, Ce3+, Pr3+, Nd3+, Sm3+, Tb3+, Dy3+, Ho3+, Er3+, Yb3+ and Bi3+, M is aluminum, yttrium or lanthanum, 0?x?4.8, 0<y?0.2, and 0?z<0.1.Type: ApplicationFiled: January 28, 2010Publication date: September 2, 2010Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Young-sic KIM, Jae-ho LEE
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Patent number: 7786659Abstract: Using Eu2+ as the luminescence center for a green-emitting phosphor, a plasma display panel and a PDP device using it are configured by using an Eu2+-activated silicate green-emitting phosphate (Ca1-xM1x)2-e.M2.Si2O7:Eue with improved decay characteristics. In the formula, M1 is at least one element selected from the group containing Sr and Ba; M2 is at least one element selected from the group containing Mg and Zn; and x indicates the mole fraction of the component M1 and e indicates the mole fraction of Eu respectively satisfy the following conditions: 0<x<1 and 0.001?e?0.2.Type: GrantFiled: June 17, 2008Date of Patent: August 31, 2010Assignee: Hitachi, Ltd.Inventors: Hitoshi Oaku, Hirotaka Sakuma, Choichiro Okazaki
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Patent number: 7781952Abstract: Provided is a green phosphor for a plasma display panel (PDP), represented by the formula: BaMgAlxOy:Mn where 7<x <15, and 12 <y <28. A phosphor layer can be prepared using BaMgAlxOy:Mn alone, which is a green phosphor used in a plasma display panel, or using a mixture of BaMgAlxOy:Mn and Zn2SiO4:Mn, and a plasma display panel including the phosphor layer formed of the green phosphor has improved luminance maintenance rate and color purity.Type: GrantFiled: March 29, 2007Date of Patent: August 24, 2010Assignee: Samsung SDI Co., Ltd.Inventors: Young-Kwan Kim, Seung-Uk Kwon
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Patent number: 7781953Abstract: A light-emitting device with open-loop control including a LED capable of emitting a blue light and a mix-light adjusting portion is provided. The mix-light adjusting portion includes a first and a second fluorescent material both capable of being excited by blue light. When the first and the second fluorescent material are excited by a short-wavelength blue light, the excitation intensity of the first fluorescent material is higher than that of the second fluorescent material. When the first and the second fluorescent material are excited by a long-wavelength blue light, the excitation intensity of the first fluorescent material is lower than that of the second fluorescent material. The peak wavelength of the emission of the first fluorescent material is smaller than that of the emission of the second fluorescent material. The dividing wavelength between the short-wavelength blue light and the long-wavelength blue light ranges from a first to a second wavelength.Type: GrantFiled: April 16, 2007Date of Patent: August 24, 2010Assignee: Lite-On Technology Corp.Inventor: Hung-Yuan Su
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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: 7781751Abstract: This invention provides a small form factor apparatus for selectively producing one or more of a plurality of wavelength distributions of radiation, comprising a UV Light Emitting Diode (LED) as the primary UV LED radiation source and one or more wavelength transforming (WT) materials separated from the primary UV LED radiation source, that in response to irradiation by the primary UV LED radiation source, produce transformed radiation having a wavelength distribution that is different from the wavelength distribution of the primary UV LED radiation source. None, one, or more than one of the various WT materials may be selected by the user, to allow either the primary UV radiation, or the transformed radiation, or both simultaneously, to be to be emitted from the apparatus in a preferred direction.Type: GrantFiled: February 7, 2008Date of Patent: August 24, 2010Inventor: William G. Gardner
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Publication number: 20100201250Abstract: The invention relates to a process for the preparation of phosphors of the formula I BawSrxCaySiO4:zEu2+??(I) where w+x+y+z=2 and 0.005?z?0.5, and to an illumination unit and to the use of the phosphor as LED conversion phosphor for white LEDs or so-called colour-on-demand applications.Type: ApplicationFiled: March 5, 2008Publication date: August 12, 2010Inventors: Holger Winkler, Tim Vosgroene, Gundula Roth, Walter Tews, Stefan Tews