Patents by Inventor Alan L. Lenef
Alan L. Lenef 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: 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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Patent number: 10422499Abstract: A reflective laser activated remote phosphor (LARP) package comprising: a phosphor platelet oriented in a first plane defined by an x-y plane; a laser diode (LD) positioned to be offset along the x-axis from the phosphor platelet and above the first plane along a z-axis perpendicular to the x-y plane, the LD comprising: an output facet configured for emitting a laser beam (LB), the LB comprising: a slow axis oriented in a first direction along which the LB diverges at a first angle; and a fast axis oriented in a second direction along which the LB diverges at a second angle greater than the first angle; wherein the LD is oriented such that: the LB is bisected by the phosphor platelet such that the slow axis of the LB lies in an x-z plane and the fast axis of the LB is perpendicular to an x-z plane.Type: GrantFiled: December 4, 2017Date of Patent: September 24, 2019Assignees: OSRAM GmbH., OSRAM SYLVANIA Inc.Inventors: Alan L. Lenef, Joerg Sorg, Jan Oliver Drumm, Sergey Kudaev
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Patent number: 10364962Abstract: A laser-activated remote phosphor (LARP) target with a first layer having a first index of refraction and a phosphor dispersed within the first layer. A second layer which has a second index of refraction different from the first index of refraction and adjoins the first layer at an interface. The first index of refraction is higher than the second index of refraction such that the interface is configured to at least partially reflect light emitted from the phosphor.Type: GrantFiled: February 23, 2017Date of Patent: July 30, 2019Assignees: OSRAM GmbH, OSRAM SYLVANIA Inc.Inventors: Joerg Sorg, Alan L. Lenef, Dennis Sprenger
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Publication number: 20190170314Abstract: A reflective laser activated remote phosphor (LARP) package comprising: a phosphor platelet oriented in a first plane defined by an x-y plane; a laser diode (LD) positioned to be offset along the x-axis from the phosphor platelet and above the first plane along a z-axis perpendicular to the x-y plane, the LD comprising: an output facet configured for emitting a laser beam (LB), the LB comprising: a slow axis oriented in a first direction along which the LB diverges at a first angle; and a fast axis oriented in a second direction along which the LB diverges at a second angle greater than the first angle; wherein the LD is oriented such that: the LB is bisected by the phosphor platelet such that the slow axis of the LB lies in an x-z plane and the fast axis of the LB is perpendicular to an x-z plane.Type: ApplicationFiled: December 4, 2017Publication date: June 6, 2019Inventors: Alan L. Lenef, Joerg Sorg, Jan Oliver Drumm, Sergey Kudaev
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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: 20180238520Abstract: A laser-activated remote phosphor (LARP) target with a first layer having a first index of refraction and a phosphor dispersed within the first layer. A second layer which has a second index of refraction different from the first index of refraction and adjoins the first layer at an interface. The first index of refraction is higher than the second index of refraction such that the interface is configured to at least partially reflect light emitted from the phosphor.Type: ApplicationFiled: February 23, 2017Publication date: August 23, 2018Inventors: Joerg Sorg, Alan L. Lenef, Dennis Sprenger
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Patent number: 9553246Abstract: A silicone-grafted core-shell particle is described wherein the silicone-grafted core-shell particle comprises a core of an inorganic particle and a shell of a grafted poly(dimethylsiloxane) polymer formed from a bi-terminated poly(dimethylsiloxane) having reactive groups at each terminal end. The silicone-grafted core-shell particles may be dispersed in a polysiloxane polymer matrix and employed as an LED encapsulant.Type: GrantFiled: July 7, 2016Date of Patent: January 24, 2017Assignee: OSRAM SYLVANIA Inc.Inventors: Maxim N. Tchoul, Alan L. Lenef, David W. Johnston
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Patent number: 9515235Abstract: A silicone-grafted core-shell particle is described wherein the silicone-grafted core-shell particle comprises a core of an inorganic particle and a shell of a grafted poly(dimethylsiloxane) polymer formed from a bi-terminated poly(dimethylsiloxane) having reactive groups at each terminal end. The silicone-grafted core-shell particles may be dispersed in a polysiloxane polymer matrix and employed as an LED encapsulant.Type: GrantFiled: January 15, 2013Date of Patent: December 6, 2016Assignee: OSRAM SYLVANIA Inc.Inventors: Maxim N. Tchoul, Alan L. Lenef, David W. Johnston
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Publication number: 20160322547Abstract: A silicone-grafted core-shell particle is described wherein the silicone-grafted core-shell particle comprises a core of an inorganic particle and a shell of a grafted poly(dimethylsiloxane) polymer formed from a bi-terminated poly(dimethylsiloxane) having reactive groups at each terminal end. The silicone-grafted core-shell particles may be dispersed in a polysiloxane polymer matrix and employed as an LED encapsulant.Type: ApplicationFiled: July 7, 2016Publication date: November 3, 2016Applicant: OSRAM SYLVANIA Inc.Inventors: Maxim N. Tchoul, Alan L. Lenef, David W. Johnston
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Publication number: 20150014727Abstract: A silicone-grafted core-shell particle is described wherein the silicone-grafted core-shell particle comprises a core of an inorganic particle and a shell of a grafted poly(dimethylsiloxane) polymer formed from a bi-terminated poly(dimethylsiloxane) having reactive groups at each terminal end. The silicone-grafted core-shell particles may be dispersed in a polysiloxane polymer matrix and employed as an LED encapsulant.Type: ApplicationFiled: January 15, 2013Publication date: January 15, 2015Applicant: OSRAM SYLVANIA INC.Inventors: Maxim N. Tchoul, Alan L. Lenef, David W. Johnston
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Patent number: 8610350Abstract: An electrode structure configured to operate in a discharge lamp and a method to make such an electrode structure are described. The electrode structure includes an electrode head portion comprising a plurality of raised features arranged in a configuration such that an average pitch of the plurality of raised features is at least 105%. The method includes providing an electrode configured to operate in the discharge lamp and forming raised features on an electrode head portion of the electrode at an average pitch of at least 105%.Type: GrantFiled: December 15, 2009Date of Patent: December 17, 2013Assignee: OSRAM Gesellschaft mit Beschraenkter HaftungInventors: Simon Lankes, Alan L. Lenef
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Patent number: 8076866Abstract: Aspects of the invention include an electronic ballast and method for controlling current through a lamp to produce various current waveforms through the lamp. In one embodiment, the ballast samples and adjusts the current through the lamp on a micro-second time scale within each half-cycle of the current waveform (i.e., at least twice within a period of a reference waveform). The ballast can accommodate different lamp types, provide arbitrary current waveforms, operate a lamp at multiple power levels, and provide power to the lamp as a function of an operational state of a lamp. For example, in one embodiment, the ballast increases power to the lamp and adjusts the current waveform provided to the lamp as the lamp ages to minimize luminous flux loss caused by darkening of lamp walls and changes in lamp chemistry.Type: GrantFiled: January 6, 2009Date of Patent: December 13, 2011Assignee: OSRAM Sylania Inc.Inventors: Phillip R. Whitt, Alan L. Lenef
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Publication number: 20110140601Abstract: An electrode structure configured to operate in a discharge lamp and a method to make such an electrode structure are described. The electrode structure includes an electrode head portion comprising a plurality of raised features arranged in a configuration such that an average pitch of the plurality of raised features is at least 105%. The method includes providing an electrode configured to operate in the discharge lamp and forming raised features on an electrode head portion of the electrode at an average pitch of at least 105%.Type: ApplicationFiled: December 15, 2009Publication date: June 16, 2011Applicant: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNGInventors: Simon Lankes, Alan L. Lenef
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Publication number: 20100171438Abstract: Aspects of the invention include an electronic ballast and method for controlling current through a lamp to produce various current waveforms through the lamp. In one embodiment, the ballast samples and adjusts the current through the lamp on a micro-second time scale within each half-cycle of the current waveform (i.e., at least twice within a period of a reference waveform). The ballast can accommodate different lamp types, provide arbitrary current waveforms, operate a lamp at multiple power levels, and provide power to the lamp as a function of an operational state of a lamp. For example, in one embodiment, the ballast increases power to the lamp and adjusts the current waveform provided to the lamp as the lamp ages to minimize luminous flux loss caused by darkening of lamp walls and changes in lamp chemistry.Type: ApplicationFiled: January 6, 2009Publication date: July 8, 2010Applicant: OSRAM SYLVANIA INC.Inventors: Phillip R. Whitt, Alan L. Lenef
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Patent number: 7541726Abstract: A base-up incandescent lamp (10) includes a coiled-coil filament (14) that has a primary wire (18) and a secondary wire (16), the primary wire (18) comprising an overwind that overlies the secondary wire (16) and provides a lower filament temperature and, therefore, less filament sag and a concomitant longer lamp life.Type: GrantFiled: May 17, 2006Date of Patent: June 2, 2009Assignee: Osram Sylvania Inc.Inventors: Jason J. Li, Alexander N. Kasak, Heinz W. Sell, Alan L. Lenef, Raymond T. Fleming, Richard C. Laird
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Patent number: 7176632Abstract: Operation of an HID lamp may be improved by forming a glow generating recess on an exterior side the electrode. The lamp may be of standard construction with a light transmissive lamp envelope having a wall defining an enclosed volume. At least one electrode assembly is extended in a sealed fashion from the exterior of the lamp through the lamp envelope wall to be exposed at an inner end of the electrode assembly to the enclosed volume. A metal halide lamp fill is enclosed with an inert fill gas. The inner end of the electrode is formed with a recess having a least spanning dimension S and a recess depth of D where S is greater the electron ionization mean free path but less than twice the cathode fall plus negative glow distances, throughout the glow discharge phase of starting, for the chosen fill gas composition and pressure (cold).Type: GrantFiled: March 15, 2005Date of Patent: February 13, 2007Assignee: Osram Sylvania Inc.Inventors: Alan L. Lenef, Helmar Adler, A. Bowman Budinger, Yan Ming Li