Patents Assigned to OSRAM
  • Surface-mountable light-emitting diode structural element
    Patent number: 6573580
    Abstract: A surface-mountable light emitting diode structural element in which an optoelectronic chip is attached to a chip carrier part of a lead frame, is described. The lead frame has a connection part disposed at a distance from the chip carrier part, and which is electrically conductively connected with an electrical contact of the optoelectronic chip. The chip carrier part presents a number of external connections for improved conduction of heat away from the chip. The external connections project from a casing and at a distance from each other.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: June 3, 2003
    Assignee: Osram Opto Semiconductors GmbH & Co. OHG
    Inventor: Karlheinz Arndt
  • Method of making electroluminescent phosphor
    Patent number: 6569357
    Abstract: A method for improving the half-life of a zinc sulfide-base electroluminescent phosphor, utilizes the steps of; charging phosphor particles into a reaction vessel; fluidizing the particles with an inert gas; heating the reaction vessel and its contents to 200° C.; introducing hexakis(dimethylamido)dialuminum into the reaction vessel; and reacting the hexakis(dimethylamido)dialuminum with the phosphor particles for 10 minutes.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: May 27, 2003
    Assignee: Osram Sylvania Inc.
    Inventor: Richard G. W. Gingerich
  • Laser radiation source and process for generating a coherent total laser radiation field
    Patent number: 6570896
    Abstract: A laser radiation source is provided with an array of N individual slave laser diodes in a predetermined surface area. Adjustable power supply networks enable adjustment of the slave laser diodes relative to one another for operation in a stable manner. The slave power supply has a separate power supply network for each slave laser diode. Each of the power supply networks can be adjusted with respect to the current supplied to the respective slave laser diode during a certain operating period. This enables adjusting the slave laser diodes relative to one another. The power supply networks can be connected in parallel and supplied by a common source.
    Type: Grant
    Filed: June 5, 2001
    Date of Patent: May 27, 2003
    Assignees: Deutsches Zentrum fuer Luft-und Raumfahrt e.V., Osram Opto Semiconductors GmbH & Co. oHG, Universitaet Stuttgart Institut fuer Strahlwerkzeuge
    Inventors: Norbert Bissinger, Uwe Brauch, Guido Hergenhan, Hans Opower, Marcus Scholl, Bernd Luecke, Werner Spaeth
  • Fabrication of organic light emitting diode using selective printing of conducting polymer layers
    Patent number: 6569706
    Abstract: A novel method for fabricating an OLED display is disclosed wherein the conducting polymer layer is selectively deposited over the surface of the display such that the conducting polymer is kept away from areas where its presence is either not required for the resulting structure or is difficult to remove with usual techniques, such as laser ablation. Other polymer layers may be deposited uniformly over the surface of the display by way of spin coating or other suitable methods known in the art.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: May 27, 2003
    Assignee: Osram Opto Semiconductors GmbH
    Inventors: Hash Pakbaz, Karl Pichler
  • Induction sealed high pressure lamp bulb
    Patent number: 6566814
    Abstract: A high pressure, lamp may be made in a pressure vessel by using an induction coil to melt an edge portion of a sealing wafer pressed against the circumference of an opening in the body of the lamp envelope. The pressure vessel and the lamp envelope are filled with desired fill materials. Induction heating is carried out by the induction coil and induction receiver that presses against the wafer, the lamp envelope or both to hold the melting piece or pieces in contact. The induction receiver may be fused to the lamp body forming a functional part of the overall lamp structure. The preferred resulting lamp includes a bonded metal piece that can be conveniently used for electrical or mechanical coupling or positioning of the lamp with respect to a base.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: May 20, 2003
    Assignee: Osram Sylvania Inc.
    Inventors: David W. Johnston, Ernest A. Davey, Jr., Gregory Zaslavsky, Dana L. Caldwell
  • High intensity discharge lamp with only one electrode
    Patent number: 6566817
    Abstract: A high intensity discharge (HID) lamp includes a starting gas, a vaporizable fill, and only one electrode sealed within a light transmissive envelope. The one electrode produces a high intensity discharge during operation of the lamp and is connected to an inlead that extends outside the sealed envelope. A ground for electric field lines emanating from the electrode during operation of the lamp is outside the envelope. The ground may be a reflector for the lamp that has an electrically conductive surface. The high intensity discharge is initiated by applying high frequency power to the inlead.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: May 20, 2003
    Assignee: Osram Sylvania Inc.
    Inventor: Walter P. Lapatovich
  • Assembly device
    Patent number: 6560857
    Abstract: An assembly device, in particular a fully automatic assembly device for producing microsystem technical products and for assembling components in the semiconductor industries, comprising an assembly table, a material transport system that transports the products to be placed with components, at least one transport system mounted on the assembly table, and at least one movable component transport unit with at least one assembly head. The component transport unit(s) is/are arranged on one or more carrier system(s) displaceable by means of a transport system in parallel to the direction of transport of the products to be placed with components, which products are in turn displaced by the material transport system(s).
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: May 13, 2003
    Assignees: Simotech GmbH, Osram Opto Semiconductors GmbH & Co. OHG
    Inventors: Günter Waitl, Johann Feraric
  • Recovery of electroluminescsent phosphor from encapsulated material
    Patent number: 6562260
    Abstract: A method of recovering a base phosphor from encapsulated phosphors, which comprises the steps of selecting a recovery vessel including a magnetic stir bar; adding to the recovery vessel, deionized water, a first batch of concentrated hydrochloric acid and encapsulated phosphor to form a stirred suspension; heating the stirred suspension to about 90° C. for about 2 hours; settling the stirred suspension; decanting the mother liquor and slurrying the remaining solids with a second batch of hydrochloric acid and water; decanting and washing the remaining solids with deionized water; filtering the remaining solids to form a filter cake; heating the filter cake at 110° C. in air for a time sufficient to form a dried filter cake; and screening the dried filter cake through a −325 mesh screen to yield a recovered base phosphor.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: May 13, 2003
    Assignee: Osram Sylvania Inc.
    Inventors: Richard G. W. Gingerich, Chen-Wen Fan, Keith A. Klindinst
  • Preparation of ZnS:Cu,Cl electroluminescent phosphor
    Patent number: 6555021
    Abstract: A process for improving the half-life of ZnS:Cu,Cl electroluminescent phosphor wherein the improvement comprises firing a previously first fired material comprised of ZnS:Cu,Cl with a quantity of MgSO4.7H2O to form a second fired material. The quantity is from 0.015 to 0.15 mole of MgSO4.7H2O/mole of ZnS.
    Type: Grant
    Filed: September 1, 2001
    Date of Patent: April 29, 2003
    Assignee: Osram Sylvania Inc.
    Inventors: Butchi Reddy Vaddi, Shellie K. Northrop
  • Supported tungsten carbide material
    Patent number: 6551569
    Abstract: A supported tungsten carbide material is provided. The material has a unique structure as defined by its x-ray diffraction pattern and consists of extremely small crystallites on the order of about 15 to about 30 angstroms in size. The tungsten carbide material is supported on a high-surface-area support to allow for a greater number of active sites for catalysis. The support consists preferably of a high-surface-area carbon.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: April 22, 2003
    Assignee: Osram Sylvania Inc.
    Inventors: Joel B. Christian, Tuan A. Dang, Robert G. Mendenhall
  • Method and circuit for controlling current in a high pressure discharge lamp
    Patent number: 6552498
    Abstract: A circuit for controlling current during run-up of a high pressure discharge lamp (140) comprises a buck converter (120) for generating a buck current to drive the high pressure discharge lamp and a control circuit (202) coupled to the buck converter (120) for varying the duty cycle of the buck current during run-up is disclosed. A method for controlling current in an electronic ballast during run-up of a high pressure discharge lamp comprises steps of detecting (501) lamp ignition, providing (502) a buck current to drive the lamp, and varying (504) the duty cycle of the buck current during run-up to control (506) the current in the lamp is also disclosed.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: April 22, 2003
    Assignee: Osram Sylvania Inc.
    Inventors: Himamshu V. Prasad, Young G. Kang, John G. Konopka, Warren Moscowitz
  • Method for a quantitative detection of a linear and rotary movement
    Patent number: 6552329
    Abstract: A method for a quantitative detection of a linear movement or rotary movement. The method includes the steps of emitting radiation from at least two light emitters in a pulsed mode at a same clock frequency or different clock frequencies and detecting the radiation from the two light emitters by a detection device. It furthermore includes the steps of increasingly shadowing the radiations by a movable grid device or separating signals originating from different light emitters by an evaluation circuit coupled to said detection device.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: April 22, 2003
    Assignee: Osram Opto Semi-Conductors GmbH Co. OHG
    Inventors: Heinz Haas, Martin Haushalter, Frank Möllmer
  • Ballast with fast-responding lamp-out detection circuit
    Patent number: 6545432
    Abstract: A ballast (10) for powering a gas discharge lamp includes a lamp-out detection circuit (300) that quickly responds to a lamp-out condition. Lamp-out detection circuit (300) receives a portion of the lamp current and provides a detection voltage. The detection voltage remains at a first average level while the lamp is conducting current in a normal manner, but quickly decreases below a second level if the lamp ceases to conduct current. In a preferred embodiment, ballast (10) includes an inverter (100) and a resonant circuit (210,220) that are normally operated at a high frequency. The detection voltage is coupled to an enable input (112) of an inverter drive circuit (110), and the inverter (100) is either shut off or operated in a low-power mode within less than ten high frequency cycles after occurrence of a lamp-out condition.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: April 8, 2003
    Assignee: Osram Sylvania Inc.
    Inventor: John G. Konopka
  • Moisture insensitive electroluminescent phosphor
    Publication number: 20030064151
    Abstract: A phosphor particle has thereon a moisture resistant treatment of a metallic nitride. By moisture resistant is meant a condition allowing the phosphor particle to fiction in a humid atmosphere for a significantly longer period of time than an untreated particle. The method of making such phosphors comprises the steps of introducing an inert gas into a reaction vessel; charging phosphor particles into the reaction vessel; heating the reaction vessel to a reaction temperature. introducing a first precursor compound such as triiosbutyl aluminum and a second precursor compound such as dimetylamine into a second reaction vessel to form a nitride precursor. The nitride precursor is hexakis(dimethylamido)dialuminum The nitride precursor is introduced into the first reaction vessel in a manner to avoid restrictive reactions.
    Type: Application
    Filed: November 13, 2001
    Publication date: April 3, 2003
    Applicant: OSRAM SYLVANIA Inc.
    Inventor: Keith A. Klinedinst
  • Radiation-emitting semiconductor component
    Publication number: 20030062821
    Abstract: In a radiation-emitting semiconductor component having a semiconductor body that comprises a radiation-generating active layer, having a central front-side contact on a front side of the semiconductor body and a back-side contact on a back side of the semiconductor body for impressing a current into the semiconductor body containing the active layer, the back-side contact comprises a plurality of contact locations spaced from one another, whereby the size of the contact locations increases with increasing distance from the central front-side contact.
    Type: Application
    Filed: September 9, 2002
    Publication date: April 3, 2003
    Applicant: Osram Opto Semiconductors GmbH
    Inventors: Walter Wegleiter, Klaus Streubel
  • Method and paste for joiningcut surfaces of ferrite cores for fluorescent lamps
    Publication number: 20030062851
    Abstract: A method for joining cut surfaces of different portions of a ferrite core for a fluorescent lamp includes the steps of providing a high magnetic permeability paste, applying the paste to the cut surface of at least one of the core portions, abutting the cut surfaces and squeezing out and removing excess paste. The paste is an admixture of ferromagnetic material and a suitable carrier material.
    Type: Application
    Filed: August 22, 2001
    Publication date: April 3, 2003
    Applicant: OSRAM SYLVANIA INC.
    Inventor: John W. Shaffer
  • Method of removing contaminants from a double-ended arc discharge tube
    Publication number: 20030057837
    Abstract: A method of removing contaminants from a double-ended arc discharge tube includes the steps of providing at least one capillary channel at each end of the tube, where the ends of the tube are sealed closed except at the capillary channels, and introducing a flushing gas into the tube through one capillary channel at one end of the tube and removing the flushing gas and contaminants through another capillary channel at another end of the tube. During manufacture, the double-ended arc discharge tube has a sealed electrode and an open capillary channel at each end of the tube.
    Type: Application
    Filed: September 26, 2001
    Publication date: March 27, 2003
    Applicant: OSRAM SYLVANIA Inc.
    Inventor: Ernest A. Davey
  • Protective spinel coating for aluminate phosphors
    Publication number: 20030059531
    Abstract: A protective coating for aluminate phosphors is described. The protective coating comprises at least a partial spinel coating having the general formula Mg1-xAl2(1-y)O4-3y-x, where 0≦x<1 and 0≦y<1. The coating is applied by an aqueous solution method which may be compatible with conventional fluorescent lamp manufacturing techniques.
    Type: Application
    Filed: September 26, 2001
    Publication date: March 27, 2003
    Applicant: OSRAM SYLVANIA Inc.
    Inventors: Madis Raukas, Kailash C. Mishra, Thomas H. Reilly
  • Overpack carton
    Publication number: 20030057128
    Abstract: An overpack carton for packing a primary shipping case includes a packing strap having interconnected side panels and a latching panel, one or more cushion strips secured to the side panels, and latching elements for latching the packing strap around at least a portion of the primary shipping case. A method for packing a primary shipping case includes steps of providing a cushioned packing strap having latching elements, wrapping the packing strap around at least a portion of the primary shipping case and interengaging the latching elements.
    Type: Application
    Filed: November 22, 2002
    Publication date: March 27, 2003
    Applicant: Osram Sylvania, Inc.
    Inventor: Gregory J. Hardy
  • High intensity discharge lamp with only electrode
    Publication number: 20030057882
    Abstract: A high intensity discharge (HID) lamp includes a starting gas, a vaporizable fill, and only one electrode sealed within a light transmissive envelope. The one electrode produces a high intensity discharge during operation of the lamp and is connected to an inlead that extends outside the sealed envelope. A ground for electric field lines emanating from the electrode during operation of the lamp is outside the envelope. The ground may be a reflector for the lamp that has an electrically conductive surface. The high intensity discharge is initiated by applying high frequency power to the inlead.
    Type: Application
    Filed: September 24, 2001
    Publication date: March 27, 2003
    Applicant: OSRAM SYLVANIA Inc.
    Inventor: Walter P. Lapatovich