Patents by Inventor James Avallon
James Avallon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11692133Abstract: In an embodiment a conversion element includes a first phase and a second phase, wherein the first phase comprises lutetium, aluminum, oxygen and a rare-earth element, wherein the second phase comprises Al2O3 single crystals, and wherein the conversion element comprises at least one groove.Type: GrantFiled: December 10, 2021Date of Patent: July 4, 2023Assignee: OSRAM Opto Semiconductors GmbHInventors: Darshan Kundaliya, Jeffery J. Serre, James Avallon, Kathleen A. Lawson
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Publication number: 20220098478Abstract: In an embodiment a conversion element includes a first phase and a second phase, wherein the first phase comprises lutetium, aluminum, oxygen and a rare-earth element, wherein the second phase comprises Al2O3 single crystals, and wherein the conversion element comprises at least one groove.Type: ApplicationFiled: December 10, 2021Publication date: March 31, 2022Inventors: Darshan Kundaliya, Jeffery J. Serre, James Avallon, Kathleen A. Lawson
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Patent number: 11254865Abstract: A method of manufacturing a conversion element is disclosed. A precursor material is selected from one or more of lutetium, aluminum and a rare-earth element. The precursor material is mixed with a binder and a solvent to obtain a slurry. A green body is formed from the slurry and the green body is sintered to obtain the conversion element. The sintering is performed at a temperature of more than 1720° C.Type: GrantFiled: August 10, 2018Date of Patent: February 22, 2022Assignee: OSRAM OPTO SEMICONDUCTORS GMBHInventors: Darshan Kundaliya, Jeffery J. Serre, James Avallon, Kathleen A. Lawson
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Publication number: 20200048547Abstract: A method of manufacturing a conversion element is disclosed. A precursor material is selected from one or more of lutetium, aluminum and a rare-earth element. The precursor material is mixed with a binder and a solvent to obtain a slurry. A green body is formed from the slurry and the green body is sintered to obtain the conversion element. The sintering is performed at a temperature of more than 1720° C.Type: ApplicationFiled: August 10, 2018Publication date: February 13, 2020Inventors: Darshan Kundaliya, Jeffery J. Serre, James Avallon, Kathleen A. Lawson
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Publication number: 20200012022Abstract: There is herein described a ceramic wavelength converter having a high reflectivity reflector. The ceramic wavelength converter is capable of converting a primary light into a secondary light and the reflector comprises a reflective metal layer and a dielectric buffer layer between the ceramic wavelength converter and the reflective metal layer. The buffer layer is non-absorbing with respect to the secondary light and has an index of refraction that is less than an index of refraction of the ceramic wavelength converter. Preferably the reflectivity of the reflector is at least 80%, more preferably at least 85% and even more preferably at least 95% with respect to the secondary light emitted by the converter.Type: ApplicationFiled: September 16, 2019Publication date: January 9, 2020Applicant: OSRAM SYLVANIA Inc.Inventors: Alan Lenef, James Avallon, Adam Scotch
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Patent number: 10488566Abstract: There is herein described a ceramic wavelength converter having a high reflectivity reflector. The ceramic wavelength converter is capable of converting a primary light into a secondary light and the reflector comprises a reflective metal layer and a dielectric buffer layer between the ceramic wavelength converter and the reflective metal layer. The buffer layer is non-absorbing with respect to the secondary light and has an index of refraction that is less than an index of refraction of the ceramic wavelength converter. Preferably the reflectivity of the reflector is at least 80%, more preferably at least 85% and even more preferably at least 95% with respect to the secondary light emitted by the converter.Type: GrantFiled: January 26, 2015Date of Patent: November 26, 2019Assignee: OSRAM SYLVANIA Inc.Inventors: Alan Lenef, James Avallon, Adam Scotch
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Patent number: 10487390Abstract: A method for producing a laser activated remote phosphor (LARP) sub-assembly, which may comprise: preparing a target composed of a material; activating the target such that the material is released from the target; directing the material released from the target in the direction of a wavelength converter and depositing the material released from the target onto a major surface of the wavelength converter creating a bonding film.Type: GrantFiled: March 10, 2017Date of Patent: November 26, 2019Assignee: OSRAM GmbHInventors: Darshan Kundaliya, David W. Johnston, James A. Avallon, Alan L. Lenef
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Publication number: 20190186711Abstract: Techniques for bonding a luminescent material to a thermally conductive substrate using a low temperature glass to provide a wavelength converter system are provided. A dichroic coating is deposited on a thermally conductive substrate. The dichroic coating includes alternating layers of a first material having a first refractive index and a second material having a second refractive index which is greater than the first refractive index. A buffer layer is deposited on the dichroic coating. A wavelength converter is bonded to the buffer layer by a layer of low temperature glass. In some embodiments, the wavelength converter includes a phosphor for converting a primary light from an excitation source into a secondary light.Type: ApplicationFiled: June 9, 2017Publication date: June 20, 2019Applicants: OSRAM SYLVANIA Inc., OSRAM GmbHInventors: Alan Lenef, Angela Eberhardt, Florian Peskoller, David Johnston, Jöerg Sorg, James Avallon, John Kelso, Madis Raukas, Joachim Wirth-Schön, Dennis Sprenger
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Publication number: 20180258520Abstract: A method for producing a laser activated remote phosphor (LARP) sub-assembly, which may comprise: preparing a target composed of a material; activating the target such that the material is released from the target; directing the material released from the target in the direction of a wavelength converter and depositing the material released from the target onto a major surface of the wavelength converter creating a bonding film.Type: ApplicationFiled: March 10, 2017Publication date: September 13, 2018Inventors: Darshan Kundaliya, David W. Johnston, James A. Avallon, Alan L. Lenef
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Publication number: 20180026168Abstract: There is herein described a light source that homogenizes the light produced by a large area array of forward directed LEDs mounted on highly reflective substrate, while achieving a low-profile form factor and maintaining high efficacy. The LED light source employs a diffuser comprised of two diffusing layers: a low scattering diffusing layer bonded to the LEDs and a high scattering diffusing layer that is bonded to the low scattering diffusing layer. The LED light source achieves good diffuse illumination with a thin diffuser by making use of a light channeling effect between the highly reflective substrate and the high backscattering from the high scattering diffusing layer.Type: ApplicationFiled: February 12, 2016Publication date: January 25, 2018Applicant: OSRAM SYLVANIA Inc.Inventors: Alan Lenef, David Hamby, James Avallon
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Publication number: 20170015901Abstract: There is herein described a ceramic phosphor target which may be used in a laser-activated remote phosphor application. The target comprises a substantially flat ceramic phosphor converter comprised of a photoluminescent polycrystalline ceramic which is attached to a reflective metal substrate by a high thermal conductivity adhesive.Type: ApplicationFiled: January 26, 2015Publication date: January 19, 2017Applicants: OSRAM SYLVANIA Inc., OSRAM GmbHInventors: Alan Lenef, James Avallon, John Kelso, Maxim Tchoul, Yi Zheng, Oliver Mehl, Peter Hoehmann, Markus Stange, Tobias Gleitsmann
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Publication number: 20160334552Abstract: There is herein described a ceramic wavelength converter having a high reflectivity reflector. The ceramic wavelength converter is capable of converting a primary light into a secondary light and the reflector comprises a reflective metal layer and a dielectric buffer layer between the ceramic wavelength converter and the reflective metal layer. The buffer layer is non-absorbing with respect to the secondary light and has an index of refraction that is less than an index of refraction of the ceramic wavelength converter. Preferably the reflectivity of the reflector is at least 80%, more preferably at least 85% and even more preferably at least 95% with respect to the secondary light emitted by the converter.Type: ApplicationFiled: January 26, 2015Publication date: November 17, 2016Applicant: OSRAM SYLVANIA INC.Inventors: Alan Lenef, James Avallon, Adam Scotch
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Patent number: 8710742Abstract: The present disclosure describes metal halide lamps having a discharge vessel, a discharge space, and at least one electrode extending into the discharge vessel in a sealed fashion so as to be in contact with the discharge space. A fill gas, at least one fill material, and optionally at least one volatile material are present in the discharge space. In some cases, the lamps can exhibit at least one of reduced run-up time, increased initial light output, and long life, while remaining useful for general lighting applications. Also described are methods for operating such metal halide lamps.Type: GrantFiled: July 6, 2011Date of Patent: April 29, 2014Assignee: OSRAM SYLVANIA Inc.Inventors: Nancy H. Chen, James A. Avallon, Edgar G. Estupiñán
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Publication number: 20130009570Abstract: The present disclosure describes metal halide lamps having a discharge vessel, a discharge space, and at least one electrode extending into the discharge vessel in a sealed fashion so as to be in contact with the discharge space. A fill gas, at least one fill material, and optionally at least one volatile material are present in the discharge space. In some cases, the lamps can exhibit at least one of reduced run-up time, increased initial light output, and long life, while remaining useful for general lighting applications. Also described are methods for operating such metal halide lamps.Type: ApplicationFiled: July 6, 2011Publication date: January 10, 2013Applicant: OSRAM SYLVANIA INC.Inventors: Nancy H. Chen, James A. Avallon, Edgar G. Estupiñán
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Publication number: 20110177747Abstract: A method of making a fritless seal in a ceramic arc tube body comprises the steps of: (a) inserting a feedthrough into an opening in a ceramic arc tube body, the feedthrough being comprised of niobium or a niobium alloy; (b) heating the arc tube body to a first temperature in an inert gas to at least partially sinter the arc tube body, the inert gas being selected from the group of argon, neon, krypton, xenon and mixtures thereof; and (c) further sintering the arc tube body by heating to a second temperature in a hydrogen atmosphere to form a hermetic seal between the feedthrough and the ceramic arc tube body, wherein the second temperature is higher than the first temperature.Type: ApplicationFiled: January 21, 2010Publication date: July 21, 2011Inventors: Thomas Patrician, James Avallon, Victor Perez, Walter Lapatovich, Joanne Browne
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Patent number: 7923932Abstract: A high intensity arc discharge lamp having a short metal seal plug running hotter than typical of capillary seals, enables a lamp with a metal fill to achieve a vapor pressure higher than the one set by the cold spot temperature typically of a capillary seal lamp. Corrosive fill materials, such as halogens are excluded. Zinc may be used to in starting the lamp.Type: GrantFiled: August 27, 2007Date of Patent: April 12, 2011Assignee: Osram Sylvania Inc.Inventors: Walter P. Lapatovich, James Avallon, John Selverian
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Publication number: 20100026181Abstract: A ceramic discharge vessel has a hollow body with at least one receptor. A molybdenum tube is shrink-fit in the receptor, preferably in the form of capillaries. The shrink fit provides a hermetic seal without the use of glass frits or other additional sealing materials. An electrode having a rod portion is inserted into the molybdenum tube. The rod portion of the electrode is welded to the tube at a remote end of the tube. The inner diameter of the molybdenum tube is no more than 0.02 mm greater than the outer diameter of the rod portion of the electrode so that a gap of 0.01 mm or less is formed between the rod portion and the tube to inhibit pooling of the discharge medium, e.g., a metal halide fill, in the gap.Type: ApplicationFiled: August 1, 2008Publication date: February 4, 2010Applicant: OSRAM SYLVANIA INC.Inventors: Victor Perez, James Avallon, Jeffrey T. Neil
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Publication number: 20090058300Abstract: A high intensity arc discharge lamp having a short metal seal plug running hotter than typical of capillary seals, enables a lamp with a metal fill to achieve a vapor pressure higher than the one set by the cold spot temperature typically of a capillary seal lamp. Corrosive fill materials, such as halogens are excluded. Zinc may be used to in starting the lamp.Type: ApplicationFiled: August 27, 2007Publication date: March 5, 2009Applicant: OSRAM SYLVANIA INCInventors: Walter P. Lapatovich, James Avallon, John Selverian
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Patent number: 6774547Abstract: A fluted feed-through for a discharge lamp includes a fluted ceramic core with plural channels and plural individual molybdenum or tungsten wires running in different ones of the plural channels. The wires are twisted together at the ends of the feed-through. The feed-through is insertable into a capillary tube of a ceramic discharge lamp. The wires of the feed-through have a different thermal coefficient of expansion than the ceramic discharge lamp. The wires are thin enough so that the absolute magnitude of the thermal coefficients of expansion is sufficiently small to prevent seal cracks and leaking.Type: GrantFiled: June 26, 2003Date of Patent: August 10, 2004Assignee: Osram Sylvania Inc.Inventors: Gregory Zaslavsky, James Avallon, Joanne Browne
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Patent number: 5580290Abstract: A method for recrystallization of tungsten filaments for incandescent lamps includes the steps of providing a tungsten filament fixed to lead-in wires, providing a light-transmitting glass envelope having a closed first end and an open second end, the first end being closed by an envelope press portion integral with the remainder of the envelope, the press portion having the lead-in wires sealed therein and extending therethrough into the envelope, introducing a forming gas into the envelope, flushing the envelope with infusions of the forming gas, flashing the filament in the presence of the forming gas to recrystallize the filament, evacuating the forming gas from the envelope, introducing fill gas into the envelope, and closing the envelope second end.Type: GrantFiled: June 15, 1995Date of Patent: December 3, 1996Assignee: Osram Sylvania Inc.Inventors: Galina Zilberstein, James A. Avallon, John W. Shaffer