Osram Sylvania Inc.

Osram Opto Semiconductors Gmbh

Victor E Perez

Jeffrey T Neil

Yi Zheng

Gregory Zaslavsky

Joseph V Lima

Walter Peter Lapatovich

Adam Scotch

Miguel Galvez

William D Koenigsberg

Joseph E Lester

Kenneth Grossman

Nathan M Zink

Mary Ann Johnson

Lewis H Palmer, Iii

Timothy J Horton

A method for preparing a glass composite wavelength converter comprising the steps of providing at least one phosphor material, providing a powder of glass components, mixing the phosphor material and the powder of glass components, thereby preparing a first mixture, adding at least one oxidizing agent to the first mixture, mixing the oxidizing agent with the first mixture, thereby preparing a second mixture, applying pressure and current to the second mixture, thereby preparing a glass composite wavelength converter is described. Furthermore, a glass component wavelength converter and a light source are described.

Method to reduce darkening in phosphor in glass (PIG) made by SPS

In one embodiment, an optoelectronic component includes a semiconductor chip, which is able to emit radiation. A conversion element comprises at least one wavelength converting phosphor dispersed in a matrix material. The matrix material is a low-melting phosphate glass and water resistant. The optoelectronic component emits in operation warm white light.

Optoelectronic component and a method for producing an optoelectronic component

There is herein described a phosphor for use in white pc-LED applications. The phosphor has a composition represented by (YGdCe)(AlSc)Owherein 0&#x3c;x&#x2266;0.3, 0&#x3c;y&#x2266;0.04 and 0&#x3c;z&#x2266;0.3. White pc-LEDs containing the phosphor exhibit less sensitivity to variations in the blue emission of LED dies than pc-LEDs containing conventional YAG:Ce and YGdAG:Ce phosphors. The phosphor may used in multiple pc-LED configurations including as a sintered ceramic converter or applied as a powder dispersed in a silicone encapsulant.

Phosphor and LEDs containing same

An LED light source () comprises a ceramic substrate () with first and second opposed surfaces (). Pockets () are formed in the first surface () and each of the pockets includes a bottom () and a sidewall or sidewalls (). A final electrical contact () comprised of a first electrically conductive material () with a coating of a second electrically conductive material () thereover is positioned in each of the pockets (). An LED () is positioned in each of the pockets () and affixed to the electrical contact () and electrical connections (), preferably in form of wire bonds, join the LEDs, the electrical connections () extending from a first LED () to an adjacent electrical contact (). The ceramic substrate () is formed by injection molding a ceramic material and binder to form a green substrate () and subsequently sintering the green substrate to form the substrate (). An LED light () can be formed from the LED light source () by adding a dome () formed of a ceramic material containing therein a homogeneous dispersion of a phosphor material capable of emitting light when excited by the light emitted from the operating LEDs ().

Light emitting diode light source having a ceramic substrate

An incandescent lamp that emits infrared light and a method of making the lamp includes a filament assembly inside a polycrystalline aluminum oxide (PCA) envelope, where the filament assembly preferably has a coiled tungsten filament, solid metal ends of tungsten or molybdenum attached to the coiled tungsten filament, and leads at distal ends of the solid metal ends. End caps are attached to ends of the envelope and have openings through which a respective one of the leads extends, where the leads are each made of an electrically conductive material having a coefficient of thermal expansion compatible with the end caps, such as niobium. The leads are attached to the end caps with glass-ceramic sealing frits. The end caps and sealing frits seal a suitable gas inside the envelope.

Incandescent lamp that emits infrared light and a method of making the lamp

A method of molding a ceramic vessel includes compressing a water-soluble powder, suspending the compressed powder shape in a mold, injecting a ceramic molding mixture into the mold, and dissolving the compressed powder by flushing the vessel with water. A core for making an arc discharge vessel that has a discharge chamber and two capillaries includes a molded core of the water-soluble powder having a shape of the discharge chamber, and preferably two capillary-forming pins extending from the molded core. An apparatus for removing the molded core that includes a water reservoir that preferably flushes water through the vessel and dissolves molded core.

Core for molding a ceramic discharge vessel

The restrike time for re-light up of an arc discharge lamp may be decreased by including at least one refractory bimetallic start up electrode that provides a shorter arc path intermediate the main arc path in a cool state, but when heated withdraws to have a relatively longer arc path. The longer arc path in the hot state results in a relatively higher path impedance that can be used by itself or in combination with a supplemental impedance device to extinguish the starting arc in favor of the main arc. The withdrawn bimetallic starting electrode then does not interfere with the main arc function.

HID lamp with rapid relight aid

A method for reducing the loss of magnesium during the sintering of aluminum oxide articles, such as ceramic discharge vessels for lighting applications. Magnesium oxide is added to aluminum oxide articles to control grain growth during sintering, but the sintering causes magnesium loss from the article. In order to address this problem, one or more aluminum oxide articles that are enriched in magnesium oxide are added to the sintering furnace to stem the loss of magnesium oxide in the remaining articles. The enriched aluminum oxide article is made by soaking a porous aluminum oxide article in an aqueous solution of magnesium nitrate and heating the porous article to convert the magnesium nitrate to magnesium oxide. The enriched articles may then be added in one or several locations to the sintering furnace, where the magnesium from the enriched articles is released to suppress the magnesium loss.

Method of reducing magnesium loss during sintering of aluminum oxide articles

A ceramic discharge vessel for a high-intensity discharge lamp includes a hollow body and two capillaries attached to the body. The capillaries have respective electrodes therein, where portions of the electrodes inside the body are spaced from each other and have longitudinal axes that are not coplanar. That is, in contrast to the prior art where the longitudinal axes are coplanar, the capillaries herein are moved (in effect, rotated) to positions in which a first plane defined by a longitudinal axis of one capillary and a first point where a second capillary is attached to the body is intersected by a longitudinal axis of the second capillary only at the first point.

Single-ended discharge vessel with diverging electrodes

A ceramic discharge vessel in a green state prior to assembly includes a first discharge vessel part in a green state, a second discharge vessel part in a green state, wherein the first and second discharge vessel parts form a discharge vessel when joined together, and a first capillary attached to the first discharge vessel part and a second capillary attached to one of the first and second discharge vessel parts. To facilitate joining the first and second discharge vessel parts, a first removable handle is temporarily attached to the first discharge vessel part for maneuvering the first discharge vessel part, and a second removable handle is temporarily attached to the second discharge vessel part for maneuvering the second discharge vessel part.

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Manchester, NH, United States of America

Victor E Perez