Envelope Composition Patents (Class 313/636)
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Patent number: 7710038Abstract: A ceramic discharge vessel is described that is provided a feedthrough comprised of a molybdenum alloy containing at least 75 weight percent molybdenum and greater than 5 weight percent of nickel and at least one other alloying metal selected from copper and iron, wherein the weight ratio of the amount of nickel to the combined amount of copper and iron, Ni:(Fe,Cu), in the alloy is in the range of 1:1 to 9:1. The thermal expansion coefficient of the alloy is sufficiently matched to that of the ceramic so that the feedthrough may be sealed to the discharge vessel without causing cracking. Preferably, the feedthrough is directly sealed to the ceramic discharge vessel without the use of an intermediate frit material.Type: GrantFiled: December 21, 2007Date of Patent: May 4, 2010Assignee: OSRAM Sylvania Inc.Inventor: Thomas J. Patrician
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Patent number: 7678725Abstract: A polycrystalline body includes aluminum oxide, magnesium oxide, zirconium oxide, and lutetium oxide. The lutetium oxide is present in an amount of at least 10 ppm of the weight of the ceramic body, and the magnesium and zirconium oxides are present at a molar ratio of from 0.5:1 to 3:1.Type: GrantFiled: May 14, 2007Date of Patent: March 16, 2010Assignee: General Electric CompanyInventors: Karthik Sivaraman, Shuyi Qin, Ming Gao
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Publication number: 20100045164Abstract: The invention concerns a glass composition for a glass body of an illuminating means with external electrodes, wherein the quotient of the loss angle (tan ?[10?4]) and the dielectric constant (??) amounts to tan ?[10?4]/??<5, i.e., tan ?/??<5×10?4). In this way, the total power loss of the illuminating means with external electrodes can be minimized in a targeted manner by means of the glass properties.Type: ApplicationFiled: December 29, 2005Publication date: February 25, 2010Inventors: Joerg Fechner, Martin Letz, Steffen Reichel, Franz Ott, Brigitte Hueber
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Patent number: 7642722Abstract: A high-pressure discharge lamp which is suitable for motor vehicle headlights, has an improved color point stability close to the black body locus, a high color temperature, and a high luminous efficacy (lm/w). The high-pressure discharge lamp includes an inner vessel with a discharge chamber, with at least two electrodes extending into the discharge chamber, and an outer bulb surrounding the inner vessel. The discharge chamber contains an ionizable filling including at least one rare gas, 0-10 mg of mercury, and a metal halide mixture. The metal halide mixture includes 40-80% by weight of sodium halide, 25-55% by weight of scandium halide, 1-15% by weight of indium halide, and 0-34% by weight of thallium halide.Type: GrantFiled: August 29, 2003Date of Patent: January 5, 2010Assignee: Koninklijke Philips Electronics, N.V.Inventors: Klaus Schoeller, Rolf Gervelmeyer
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Patent number: 7638951Abstract: A plasma lamp with a positive-loop feedback topology, having a resonating waveguide body and at least one amplifier critically coupled to the body which is stable under all operating conditions both before a plasma is formed and after the plasma reaches steady state. An iterative method for configuring the lamp circuit includes determining the load trajectory of each amplifier under all operating conditions, and overlaying it on a polar-plot showing regions of stability, conditional stability, and instability. If the load trajectory passes through an unstable region, circuit alterations are made to avoid that region.Type: GrantFiled: October 27, 2006Date of Patent: December 29, 2009Assignee: Luxim CorporationInventors: Marc DeVincentis, Frederick M. Espiau, Yian Chang
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Publication number: 20090267515Abstract: The invention relates to a high-pressure discharge lamp (12), and a reflector lamp. The high-pressure discharge lamp has a discharge vessel (22, 61) enclosing a discharge space (24) which is provided with an ionizable filling comprising one or more halides. The discharge vessel is substantially constituted by a ceramic material (51, 52) having first and second end portions (33, 34). Current-supply conductors (44) issue through each end portion to respective electrodes (42) arranged in the discharge space (24) so as to maintain a discharge. At least one of the current-supply conductors is formed as a rod (44) comprising iridium. The rod is directly sealed to the ceramic material. Use of the iridium rod which is directly sealed to the ceramic material has the effect that the interface between the rod and the ceramic material is strong and substantially free from cracks, resulting in a longer lifetime of the high-pressure discharge lamp.Type: ApplicationFiled: December 14, 2007Publication date: October 29, 2009Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Josephus Christiaan Maria Hendricx, Peter Jozef Vrugt, Franciscus Johannes Gerardus Hakkens, Cornelis Johannes Maria Denissen
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Patent number: 7598191Abstract: Glass for gas discharge tubes, which are used in fluorescent lamps, EEFL lamps, LCD displays, computer monitors, telephone displays and TFT displays, and a process for making it are described. The glass contains, in % by weight based on oxide content: SiO2, 60-75; B2O3, >25-35; Al2O3, 0-10; Li2O, 0-10; Na2O, 0-20; K2O, 0-20; MgO, 0-8; CaO, 0-20; SrO, 0-5; BaO, 0-5; ZnO, 0-3; ZrO2, 0-5; TiO2, 0-10; Fe2O3, 0-0.5; CeO2 0-0.5; MnO2, 0-1.0; Nd2O3, 0-1.0; WO3, 0-2; Bi2O3, 0-5; MoO3, 0-5; As2O3, 0-1; Sb2O3, 0-1; SO42?, 0-2; Cl-, 0-2 and F?, 0-2, wherein ?Li2O+Na2O+K2O=0-25% by weight; ?MgO+CaO+SrO+BaO=0-20; ?Fe2O3+CeO2+TiO2+PbO+As2O3+Sb2O3 is at least 0-10; and ?PdO+PtO3+PtO2+PtO+RhO2+Rh2O3+IrO2+Ir2O3 is from 0.00001-0.1.Type: GrantFiled: July 11, 2005Date of Patent: October 6, 2009Assignee: Schott AGInventors: Joerg Fechner, Franz Ott, Brigitte Hueber
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Publication number: 20090230861Abstract: A plasma display panel includes front glass substrate and rear glass substrate disposed opposite to each other so as to form an image display area and an image non-display area. The image non-display area includes a sealing portion in which glass substrates are sealed at a periphery thereof by a seal layer. At least one of front glass substrate and rear glass substrate has a thickness of 0.5 mm or more and 2.0 mm or less. The seal layer is made of a glass material having a softening point temperature 30° C. through 70° C. lower than the sealing temperature at which the periphery of front glass substrate and rear glass substrate are sealed by the seal layer.Type: ApplicationFiled: March 30, 2007Publication date: September 17, 2009Inventors: Akinobu Miyazaki, Masaki Nishimura, Masaki Nishinaka
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Patent number: 7589468Abstract: A metal halide lamp is disclosed comprising an elongated discharge vessel, preferably made of a ceramic material, surrounded by an outer envelope and having a wall which encloses a discharge space containing an inert gas, such as xenon, and an ionizable filling, wherein at both ends in said discharge space an electrode is arranged between which a discharge arc can be maintained along a discharge path, wherein one end of the discharge vessel is mounted in a mounting base, said lamp comprising a band-shaped light-shielding strip extending laterally of the discharge path, and a lead-back conductor supplying current from the mounting base to the electrode at the other end of the discharge vessel, wherein, seen in cross section, the lead-back conductor is positioned within the sector defined by the two lines through the center of the discharge vessel and the edges of said strip.Type: GrantFiled: September 10, 2004Date of Patent: September 15, 2009Assignee: Koninklijke Philips Electronics N.V.Inventor: Josephus Christiaan Maria Hendricx
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Patent number: 7553786Abstract: The alumino-silicate glass for lamp bulbs with molybdenum components contains alkaline earth metals and has the following composition (in % by weight based on oxide): SiO2>58 to 62, Al2O3 15 to 17.5, MgO 0.1 to <1, CaO 5.5 to 14, SrO 0 to 8, BaO 6 to 17, ZrO2 0 to 1, CeO2 0 to 0.3, TiO2 0 to 5, MoO3 0 to 2, Bi2O3 0 to 4, with a sum total amount of alkaline earth oxides from 11.6 to 29. In addition, the alumino-silicate glass is free of B2O3 so that it has a high thermal stability. Lamp bulbs made with this glass can withstand a bulb temperature of greater than 650° C.Type: GrantFiled: September 27, 2005Date of Patent: June 30, 2009Assignee: Schott AGInventors: Joerg Hinrich Fechner, Franz Ott
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Publication number: 20090146569Abstract: The low-pressure mercury vapor discharge lamp has a lamp envelope (10) enclosing, in a gastight manner, a discharge space provided with a filling of mercury and a rare gas. The lamp envelope comprises discharge means for maintaining a discharge in the discharge space. The lamp envelope transmits UV-light and is made of a black glass component. The composition of the black glass component is free of PbO and comprises, expressed as a percentage by weight, the following constituents: 65-70% by weight of SiO2, 1.4-2.2% by weight of Li2O, 1.5-2.5% by weight of Na2O, 11-13% by weight of K2O, 1.8-2.6% by weight of MgO, 2.5-5% by weight of CaO, 2-3.5% by weight of SrO, 8-9.5% by weight of BaO, 0.2-0.4% by weight of CoO, and 1.7-3.25% by weight of NiO. The low-pressure mercury vapor discharge lamp is preferably used in an apparatus for treatment with radiation for personal care.Type: ApplicationFiled: November 21, 2005Publication date: June 11, 2009Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Simon Krijnen, Theodorus Herman Ketelaar, Olaf Mastenbroek, Roland Blasig
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Patent number: 7541742Abstract: The present invention provides colored glass containing no hazardous substances, such as CdS, CdSe and PbCrO4, and used for lamps and covers for lighting, a colored glass bulb with yellow to orange color produced by using said colored glass, and a method for producing said colored glass and said colored glass bulb. Glass composition having a formula of R?2O—RO—SiO2 (wherein R? is an alkali metal element and R is an alkaline earth metal element) is added with 0.01-0.6 of weight ratio of Mo (molybdenum) as MoO3 and 0.01-1.0 of weight ratio of S to obtain the colored glass and the colored glass bulb therefrom. The colored glass having a formula of R?2O—RO—SiO2 is formed to a desired shape to obtain the colored glass bulb, and the shaped hollow article is heated to 400-620° C. to apply a coloring treatment thereto.Type: GrantFiled: December 1, 2005Date of Patent: June 2, 2009Assignees: Maeda Kogyo Co., Ltd., Nippon Electric Glass Co., Ltd.Inventors: Hideki Oyama, Yukio Takagi
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Patent number: 7538058Abstract: The sintered body of gastight translucent polycrystalline alumina contains oxidic magnesium, an oxidic second metal selected from erbium, holmium, thulium and dysprosium, and oxidic zirconium. The body can be used in a lamp vessel of an electric lamp.Type: GrantFiled: December 18, 2002Date of Patent: May 26, 2009Assignee: Koninklijke Philips Electronics N.V.Inventors: Franciscus Leonardus Gerardus Vries, Henricus Josephus Kunnen, legal representative, Antonie Hubert Marie Kees
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Patent number: 7535179Abstract: The lamp bulb for discharge lamps is made from an aluminosilicate glass with a transformation temperature Tg>600° C. The aluminosilicate glass has a composition (in % by weight, based on oxide content) of SiO2>55-64; Al2O3, 13-18; B2O3, 0-5.5; MgO, 0-7; CaO, 5-14; SrO, 0-8; BaO, 6-17; ZrO2, 0-2; TiO2, 0-5, but may contain small amounts of CeO2 and/or Fe2O3, for anti-solarization and fining agents, such as SnO2, Sb2O3 and/or As2O3. The lamp bulbs for the discharge lamps of the invention may include a melted-in molybdenum electrode and/or an electrode feed or they may be free of any internal electrodes. A method for making the lamp bulbs is also described.Type: GrantFiled: March 20, 2003Date of Patent: May 19, 2009Assignee: Schott AGInventors: Brigitte Hueber, Juergen Achatz, Franz Ott, Joerg Fechner
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Patent number: 7518314Abstract: The invention relates to electric lamps and more particularly to automotive signal lamps. A glass composition is described for use in electric lamps, which glass is red colored. The glass composition comprises copper between 0.1 and 2% by weight, tin between 0.1 and 2% by weight, barium between 7 and 11% by weight, and strontium between 1 and 5% by weight.Type: GrantFiled: October 16, 2003Date of Patent: April 14, 2009Assignee: Koninklijke Philips Electronics N.V.Inventors: Maarten Walter Steinmann, Hubertina Maria Ulenaers, Simon Krijnen, Simon Flink
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Patent number: 7514871Abstract: The invention relates to a high-pressure gas-discharge lamp, having at least one gastight fused press-seal between a glasslike material and molybdenum, wherein the molybdenum in the fused press-seal is at least partly exposed to an oxidizing environment and at least that part of the molybdenum that is exposed to the oxidizing environment is covered with a coating, and the coating comprises at least one oxide from among Fe2O3, Ta2O5, Nb2O5, Al2O3, SiO2, TiO2, ZrO2, HfO2, and/or one nitride from among TiN, ZrN, HfN, AlN, BN, and/or one carbide from among TiC, ZrC, HfC, VC, NbC, TaC, B4C.Type: GrantFiled: September 23, 2003Date of Patent: April 7, 2009Assignee: Koninklijke Philips Electronics, N.V.Inventors: Robert Peter Scholl, Rainer Hilbig, Achim Gerhard Körber, Johannes Baier, Klaus Gawron, Dieter Leers
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Publication number: 20090066251Abstract: An opaque zone in the polycrystalline (PCA) discharge vessel of a high intensity discharge lamp may be made by creating residual pores in predetermined regions of the final-sintered discharge vessel. The control over the placement of the opaque zone is achieved by forming a carbonaceous residue in a specific region of the discharge vessel prior to final sintering. During sintering, the carbonaceous material causes residual porosity in the sintered PCA. The higher emissivity of the opaque PCA provides localized cooling in order to provide more control over the condensate behavior in the discharge vessel.Type: ApplicationFiled: September 7, 2007Publication date: March 12, 2009Applicant: OSRAM SYLVANIA INC.Inventors: George C. Wei, Christopher A. Tarry, Roland Huettinger
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Patent number: 7501368Abstract: A glass composition for use in a lamp bulb includes cobalt oxide to provide a blue colored glass. The composition has an alkali metal oxide including lithium oxide. Such composition has a glass transition temperature Tg below 700° C.; e.g., below 500° C. The glass composition is used for forming, during operation, a blue light-emitting bulb for an automotive lamp.Type: GrantFiled: April 26, 2005Date of Patent: March 10, 2009Assignee: Koninklijke Philips Electronics N.V.Inventors: Simon Flink, Hubertina Maria Petra Ulenaers, Maarten Walter Steinmann
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Patent number: 7498747Abstract: A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.Type: GrantFiled: March 18, 2005Date of Patent: March 3, 2009Assignee: Luxim CorporationInventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
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Patent number: 7459854Abstract: A high-pressure discharge lamp for a vehicle headlight having a discharge vessel and electrodes arranged therein for the purpose of generating a gas discharge, the discharge vessel having a central section which is delimited by two planes which are arranged perpendicularly to the connection path of the discharge-side ends of the electrodes and each extend through the discharge-side end of one of the electrodes, wherein the volume, which is arranged in said central section and is filled by the material of the discharge vessel, is greater than or equal to 95 mm3.Type: GrantFiled: August 25, 2005Date of Patent: December 2, 2008Assignee: Patent - Treuhand - Gesellschaft für elektrische Glühlampen mbHInventors: Dirk Grundmann, Conrad Schimke
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Publication number: 20080284338Abstract: A polycrystalline body includes aluminum oxide, magnesium oxide, zirconium oxide, and lutetium oxide. The lutetium oxide is present in an amount of at least 10 ppm of the weight of the ceramic body, and the magnesium and zirconium oxides are present at a molar ratio of from 0.5:1 to 3:1.Type: ApplicationFiled: May 14, 2007Publication date: November 20, 2008Inventors: Karthik Sivaraman, Shuyi Qin, Ming Gao
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Patent number: 7443091Abstract: A hermetically sealed lamp having at least one seal-material-free bond. The seal material-free bond may be a material diffusion bond, a mechanically deformed bond such as a cold weld or crimp, a focused heat bond such as a laser bond, or any other such bond. For example, the hermetically sealed lamp may have one or more endcaps diffusion bonded to an arc envelope, such as a ceramic tube or bulb. The hermetically sealed lamp also may have one or more tubular structures, such as dosing tubes, which are mechanically closed via cold welding or crimping. Localized heating, such as the heat provided by an intense laser, also may be used to enhance any of the foregoing bonds.Type: GrantFiled: February 27, 2007Date of Patent: October 28, 2008Assignee: General Electric CompanyInventors: Bernard P. Bewlay, James A. Brewer, Sylvain S. Coulombe, Sylvia M. DeCarr, Luana E. Iorio, Anteneh Kebbede, Timothy J. Sommerer, James S. Vartuli
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Patent number: 7439676Abstract: A cold cathode fluorescent lamp (1) has feedthrough pins (5) made from molybdenum or a molybdenum alloy that form a glass-metal seal (6) with a glass composed of 55-75 wt. % SiO2, 13-25 wt. % B2O3, 0-10 wt. % Al2O3, 5-12 wt. % alkali oxides, 0-3 wt. % alkali earth oxides, 0-5 wt. % ZrO2, 0-10 wt. % TiO2 und 0-5 wt. % remaining oxides. The lamp has hollow cathodes (4) made from a material of the group molybdenum, molybdenum alloys, niobium, niobium alloys, and the lamp is manufactured in a compact form using conventional manufacturing parameters, and the resulting lamp has crack free, long-term vacuum-tight glass-metal seals.Type: GrantFiled: May 27, 2004Date of Patent: October 21, 2008Assignees: Plansee SE, Schott AGInventors: Herman Walser, Wolfram Knabl, Gerhard Leichtfried, Jörg Hinrich Fechner, Franz Ott, Ralf Diezel, Brigitte Hueber
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Patent number: 7420331Abstract: A ceramic discharge vessel is provided wherein the vessel comprises a hollow body for enclosing a discharge and the hollow body is made of a polycrystalline dysprosium oxide containing a luminescent dopant that emits one or more visible light wavelengths when stimulated by radiation generated by the discharge. Preferably, the polycrystalline dysprosium oxide has been doped with one or more of europium, cerium, or terbium in an amount from about 0.1 to about 10 percent by weight on an oxide basis.Type: GrantFiled: June 24, 2005Date of Patent: September 2, 2008Assignee: Osram Sylvania Inc.Inventors: George C. Wei, Walter P. Lapatovich, Joanne M. Browne, Kailash C. Mishra, Madis Raukas
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Patent number: 7396792Abstract: The present invention relates to highly dense translucent and transparent aluminium oxide components for applications, e.g. in the lighting industry, where a fine crystal size has to be obtained and stabilized for use at temperatures of 800° C. or more. Disclosed are high-strength polycrystalline alumina products which include 0.001-0.5 weight-% ZrO2 stabilizing a fine crystal size <2 ?m or, preferably, <1 ?m if used at temperatures of 800° C. or more. The microstructure exhibits an extremely high relative density enabling a high real in-line transmission >30% measured over an angular aperture of at most 0.5° at a sample thickness of 0.8 mm and with a monochromatic wavelength of light ?, preferably, of 645 nm.Type: GrantFiled: July 2, 2003Date of Patent: July 8, 2008Assignees: Koninklijke Philips Electronics, N.V., Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung e.V.Inventors: Michel Paul Barbara Van Bruggen, Rolf Theo Anton Apetz, Theo Arnold Kop, Andreas Krell, Thomas Hutzler
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Patent number: 7391158Abstract: A dielectric waveguide integrated plasma lamp (DWIPL) with a body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A bulb positioned in at least one lamp chamber in the body contains a gas-fill which when receiving energy from the resonating body forms a light-emitting plasma.Type: GrantFiled: March 18, 2005Date of Patent: June 24, 2008Assignee: Luxim CorporationInventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
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Patent number: 7390761Abstract: The invention relates to an alkaline-earth aluminosilicate glass with the following composition (in wt. %, based on oxide content): SiO2 >58-62; B2O3 0 5.5; Al2O3 13.5 17.5; MgO 0-7; CaO 5.5-14; SrO 0-8, BaO 6-14; ZrO2 0-2; CeO2 0.001 0.5; TiO2 0.01-2. The glass is particularly suitable for use as a bulb material for halogen light bulbs.Type: GrantFiled: January 29, 2003Date of Patent: June 24, 2008Assignee: Schott AGInventors: Joery Hinrich Fechner, Peter Brix, Franz Ott
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Publication number: 20080122362Abstract: A transparent sintered yttrium aluminum garnet ceramic material formed from a solid-state reaction of a mixture of yttrium oxide powder and aluminum oxide powder during sintering. The ceramic material preferably has an in-line transmission of greater than 75% so it may used to fabricate arc tubes for high intensity discharge lamps used in automotive headlamps.Type: ApplicationFiled: November 7, 2006Publication date: May 29, 2008Inventors: Gregory M. Gratson, James A. Brewer, Venkat S. Venkataramani, Mohamed Rahmane, Svetlana Selezneva, Sairam Sundaram
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Patent number: 7378799Abstract: In certain embodiments, a lamp is provided with an arc envelope including a ceramic, an end member including a material different from the ceramic, and a compliant seal disposed between the end member and the arc envelope. The compliant seal includes a plurality of layers having different thermal expansion characteristics in an order of gradual change between the arc envelope and the end member.Type: GrantFiled: November 29, 2005Date of Patent: May 27, 2008Assignee: General Electric CompanyInventors: Bernard Bewlay, Bruce Knudsen, Mohamed Rahmane, James Vartuli, James Brewer
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Publication number: 20080093963Abstract: The invention relates to lamp comprising a light source in an outer envelope which is connected to a lamp base in a gas-tight manner. According to the invention, the lamp base is substantially made of a metal.Type: ApplicationFiled: August 10, 2005Publication date: April 24, 2008Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Leo Gustaaf Joanna Emiel Marien, Paulus Albertus Maria Vermeulen
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Patent number: 7362054Abstract: A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.Type: GrantFiled: March 18, 2005Date of Patent: April 22, 2008Assignee: Luxim CorporationInventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
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Patent number: 7362053Abstract: The present invention is a ceramic discharge vessel for use in high-intensity-discharge (HID) lamps. The discharge vessel has a ceramic body and at least one seal region comprised of an aluminum oxynitride material. The seal region further has a surface layer for contacting a frit material wherein the surface layer is less reactive than the aluminum oxynitride material with respect to the molten frit during sealing. Preferably, the surface layer has a lower nitrogen content than the aluminum oxynitride material. The less reactive surface acts to minimize the formation of bubbles in the sealing frit during the sealing operation.Type: GrantFiled: January 31, 2005Date of Patent: April 22, 2008Assignee: Osram Sylvania Inc.Inventors: George C. Wei, Harry S. Mackel
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Patent number: 7358678Abstract: A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.Type: GrantFiled: March 18, 2005Date of Patent: April 15, 2008Assignee: Luxim CorporationInventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
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Patent number: 7352131Abstract: The electric lamp has a glass component with a composition which, according to the invention, is substantially free of PbO and has the following constituents: 55–70 wt. % SiO2, <0.1 weight % Al2O3, 0.5–4 weight % Li2O, 0.5–3 weight % Na2O, 10–15 wt. % K2O, 0–3 wt. % MgO, 0–4 wt. % CaO, 0.5–5 wt. % SrO, 7–10 wt. % BaO. Preferably, the composition of the glass comprises: 65–70 wt. % SiO2, 1.4–2.2 wt. % Li2O, 1.5–2.5 wt. % Na2O, 11–12.3 wt. % K2O, 1.8–2.6 wt. % MgO, 2.5–5 wt. % CaO, 2–3.5 wt. % SrO, 8–9.5 wt. % BaO. The glass is preferably used as a CFL-envelope glass or as glass for a stem. The electric lamp made with a glass according to the invention has favorable fusion and processing properties, in particular a liquidus temperature Tliq?800° C.Type: GrantFiled: June 18, 2003Date of Patent: April 1, 2008Assignee: Koninklijke Philips Electronics N.V.Inventors: Roland Blasig, Simon Krijnen
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Patent number: 7348732Abstract: A dielectric waveguide integrated plasma lamp (DWIPL) with a body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A bulb positioned in at least one lamp chamber in the body contains a gas-fill which when receiving energy from the resonating body forms a light-emitting plasma.Type: GrantFiled: February 4, 2004Date of Patent: March 25, 2008Assignee: Luxim CorporationInventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
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Publication number: 20080067939Abstract: There is described a lamp having a high-temperature glass envelope, at least one feedthrough assembly, and a light source disposed within the envelope; the at least one feedthrough assembly having an inner electrical lead connected to the light source, an outer electrical lead for conducting electrical energy from an outside source to the light source, and an intermediate connector electrically connecting the inner and outer electrical leads, the intermediate connector being resistant to oxidation within a temperature range up to 1200° C and having a thermal expansion coefficient in the range of 0-2 ppm/° C.; and the intermediate connector being sealed within a seal area of the envelope.Type: ApplicationFiled: September 19, 2006Publication date: March 20, 2008Applicant: OSRAM SYLVANIA Inc.Inventors: John H. Selverian, Ernest Davey
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Patent number: 7319289Abstract: A light emitting device has a light emitting element, and a phosphor layer of phosphor glass to generate fluorescence while being excited by light emitted from the light emitting element. The light emitting element emits ultraviolet light, and the phosphor glass generates visible fluorescence while being excited by the ultraviolet light.Type: GrantFiled: March 10, 2004Date of Patent: January 15, 2008Assignees: Toyoda Gosei Co., Ltd., Sumita Optical Glass, Inc.Inventors: Yoshinobu Suehiro, Mitsuhiro Inoue, Hideaki Kato, Tohru Terajima, Kazuya Aida, Naruhito Sawanobori
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Patent number: 7319293Abstract: The present light bulb includes a wide angle dispersed light which uses, as a source of light dispersion, crystalline particulate material incorporated into the molded or formed material of the light bulb. The crystalline particulate material can be incorporated into the light bulb material prior to the molding or forming process or it can be later applied to the surfaces of the light bulb. The crystalline particulate material are chosen to provide high reflectivity and dispersion qualities for the parts of the light bulb and are further chosen and incorporated according to the function of the particular piece or part therein incorporated. A light tuning element may also be used to further enhance the light dispersion qualities of the light bulb. Methods for making the present light bulb are also provided.Type: GrantFiled: August 9, 2004Date of Patent: January 15, 2008Assignee: Lighting Science Group CorporationInventor: Fredric Maxik
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Patent number: 7315125Abstract: The fluorescent lamp is made with an aluminum-free borosilicate glass having a composition, in percent by weight, based on oxide content of: SiO2, 65-77; B2O3, 7-20; Li2O, 0-2; Na2O, 0-4; K2O, 3-12; MgO, 0-2; CaO, 0-2; with MgO+CaO, 0-3; BaO, 0-3; ZnO, 0-2; ZrO2, 0.8-12; TiO2, 0-10; CeO2, 0-1; and F?, 0-0.6. Preferred embodiments with more than 1% by weight TiO2 have especially good UV blocking properties and are especially suitable for lamp glass for backlights. Other embodiments have good sealing properties to tungsten, KOVAR®, and molybdenum and have coefficients of thermal expansion ? of 4.7 to 5.3×10?6/K, good chemical resistance, and a working point VA of between 990° C. and 1290° C.Type: GrantFiled: September 1, 2006Date of Patent: January 1, 2008Assignee: Schott AGInventor: Christof Kass
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Patent number: 7311432Abstract: Backlight modules. A backlight module for a flat display device includes a light guide element and a fluorescent lamp assembly. The fluorescent lamp assembly disposed on a first side of the light guide element includes a first fluorescent lamp and a second fluorescent lamp. The first fluorescent lamp comprises a first end, a second end and a first phosphor coating on an inner surface of the first fluorescent lamp, wherein the first phosphor near the first end is thicker than the second end. The second fluorescent lamp comprises a third end adjacent to the second end, a fourth end adjacent to the first end, and a second phosphor coating on an inner surface of the second fluorescent lamp, wherein the second phosphor near the third end is thicker than the fourth end.Type: GrantFiled: June 1, 2005Date of Patent: December 25, 2007Assignee: AU Optronics Corp.Inventors: Chao-Kai Huang, Meng-Chieh Cheng, Pei-Chen Chan
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Patent number: 7247591Abstract: A translucent polycrystalline material suitable for use in ceramic discharge vessels for metal halide lamps is produced by sintering an alumina powder doped with a MgO sintering aid in a nitrogen atmosphere containing a partial pressure of a vapor phase carbon-containing species. The sintered polycrystalline alumina has a grain boundary phase containing aluminum, oxygen and nitrogen. The formation of the AL—O—N grain boundary phase is believed to facilitate the transport of nitrogen from entrapped pores during sintering. Preferably, the PCA is sintered in a carbon-element furnace under flowing ultra-high-purity nitrogen.Type: GrantFiled: May 26, 2005Date of Patent: July 24, 2007Assignee: Osram Sylvania Inc.Inventor: George C. Wei
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Patent number: 7217673Abstract: The borosilicate glass of the invention is highly resistant to solarization, because it is free of CeO2. Also it contains 0.01 to 0.05 wt. % of Fe2O3 and 0.05 to 0.8 wt. % of TiO2. This borosilicate glass is especially advantageous for production of flash tubes, gas discharge lamps, and fluorescent tubes for brake lights and display backlights.Type: GrantFiled: February 20, 2002Date of Patent: May 15, 2007Assignee: Schott AGInventors: Karin Naumann, Simone Ritter, Franz Ott, Herbert Stappen
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Patent number: 7215081Abstract: A hermetically sealed lamp having at least one seal-material-free bond. The seal material-free bond may be a material diffusion bond, a mechanically deformed bond such as a cold weld or crimp, a focused heat bond such as a laser bond, or any other such bond. For example, the hermetically sealed lamp may have one or more endcaps diffusion bonded to an arc envelope, such as a ceramic tube or bulb. The hermetically sealed lamp also may have one or more tubular structures, such as dosing tubes, which are mechanically closed via cold welding or crimping. Localized heating, such as the heat provided by an intense laser, also may be used to enhance any of the foregoing bonds.Type: GrantFiled: December 18, 2002Date of Patent: May 8, 2007Assignee: General Electric CompanyInventors: Bernard P. Bewlay, James A. Brewer, Sylvain S. Coulombe, Sylvia M. DeCarr, Luana E. Iorio, Anteneh Kebbede, Timothy J. Sommerer, James S. Vartuli
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Patent number: 7211957Abstract: An alumino earth-alkali silicate glass for lamp bulbs of tungsten halogen incandescent lamps has the following glass composition (% by weight) that reduces discoloration during operation of the lamp bulb: SiO2 55.0–62.5?? Al2O3 14.5–18.5?? B2O3 0.8–4.0?? BaO 7.5–17.0? CaO 6.5–13.5? MgO 1.0–5.5?? SrO 0–2.0 ZrO2 0–1.5 TiO2 0–1.0 ZnO 0–0.5 CeO2 0–0.3 R2O <0.03 H2O 0.025–0.042.Type: GrantFiled: December 29, 2004Date of Patent: May 1, 2007Assignee: Telux-Spezialglas GmbHInventors: Hannelore Bergmann, Hans-Jurgen Bergmann
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Patent number: 7199523Abstract: A cold cathode fluorescent lamp includes a light-emitting tube made from borosilicate glass doped with 5.1–9.0 wt % of an ultraviolet light absorbent, the light-emitting tube having phosphors coated on an inner surface thereof, and mercury and a rare gas enclosed therein. As a result, 313 nm UV light in addition to 254 nm UV light is sufficiently blocked, thus enabling the provision of cost-effective CCFLs that do not readily cause a reduction in the surface brightness of backlight units.Type: GrantFiled: November 2, 2004Date of Patent: April 3, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazuhiro Matsuo, Kenji Yamada
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Patent number: 7164233Abstract: An automotive lamp has a sealed envelope of barium silica glass that is essentially free of cadmium and in which a light emitting element is contained. Lead-in wires extend through the envelope and are coupled to the light emitting element. The glass envelope and lead-in wires have respective coefficients of thermal expansion over a temperature range form ambient to 520° C. which closely match one another to minimize stress and cracking of the envelope at the interface.Type: GrantFiled: December 28, 2004Date of Patent: January 16, 2007Assignee: Federal Mogul World Wide, Inc.Inventors: Johnny D. Bryant, Paul R. Pumphrey
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Patent number: 7132797Abstract: A hermetically sealed lamp having at least one end-to-end seal. The end-to-end seal may be a material diffusion bond, a seal-material bond, or any other suitable bond. For example, the hermetically sealed lamp may have one or more endcaps butt-sealed to an arc envelope, such as a ceramic tube or bulb. The hermetically sealed lamp also may have one or more tubular structures, such as dosing tubes, which are butt-sealed to the endcap and/or arc envelope. Localized heating, such as the heat provided by an intense laser, also may be used to enhance any of the foregoing bonds.Type: GrantFiled: December 18, 2002Date of Patent: November 7, 2006Assignee: General Electric CompanyInventors: Anteneh Kebbede, Bernard P. Bewlay, James A. Brewer, Sylvain S. Coulombe, Sylvia M. DeCarr, Luana E. Iorlo, Timothy J. Sommerer, James S. Vartuli
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Patent number: 7098598Abstract: The invention relates to a low-pressure gas discharge lamp which includes at least one discharge vessel and at least two capacitive coupling-in structures and operates at an operating frequency f. In order to achieve a better efficiency in combination with a small structural volume, a high luminous flux, a low operating voltage, a low electromagnetic emission, a high resistance against switching transients and a long service life for the low-pressure gas discharge lamp, it is proposed to form each capacitive coupling-in structure from at least one dielectric having a thickness d and a dielectric constant ?, each dielectric being subject to the condition d/(f.?)<10?8 cm·s. A substantially larger amount of light can thus be generated per lamp length (lumen/cm).Type: GrantFiled: July 27, 2004Date of Patent: August 29, 2006Assignee: Koninklijke Philips Electronics N.V.Inventors: Albrecht Kraus, Bernd Rausenberger, Wilhelm Albert Groen, Horst Dannert
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Patent number: 7081225Abstract: An apparatus for sterilizing or disinfecting fluids, which comprises a fluid conduit, an ultraviolet light source, which is at least partially within the fluid conduit, and an air drive unit coupled to the fluid conduit. The ultraviolet light source generates an ultraviolet light, which kills microorganisms in the fluid, thus sterilizing or disinfecting the fluid. The air dive unit creates air bubbles in the fluid, such as for fish tanks, fish hatchery ponds, or the like. In accordance with one embodiment of the present invention, the ultraviolet light source comprises an ultraviolet light bulb being surrounded by a protective sleeve. The protective sleeve preferably comprises a UV transmissive material, which may comprise a fluoropolymer material, such as PTFE, FEP, PFA, AF and Tefzel ETFE.Type: GrantFiled: July 19, 2000Date of Patent: July 25, 2006Inventor: Brad C. Hollander
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Patent number: 7049255Abstract: The present invention provides colored glass containing no hazardous substances, such as CdS, CdSe and PbCrO4, and used for lamps and covers for lighting, a colored glass bulb with yellow to orange color produced by using said colored glass, and a method for producing said colored glass and said colored glass bulb. Glass composition having a formula of R?2O—RO—SiO2 (wherein R? is an alkali metal element and R is an alkaline earth metal element) is added with 0.01–0.6 of weight ratio of Mo (molybdenum) as MoO3 and 0.01–1.0 of weight ratio of S to obtain the colored glass and the colored glass bulb therefrom. The colored glass having a formula of R?2O—RO—SiO2 is formed to a desired shape to obtain the colored glass bulb, and the shaped hollow article is heated to 400–620° C. to apply a coloring treatment thereto.Type: GrantFiled: September 27, 2001Date of Patent: May 23, 2006Assignees: Maeda Kogyo Co., LTD, Nippon Electric Glass Co., LTDInventors: Hideki Oyama, Yukio Takagi