Abstract: An optically pumped semiconductor device has a semiconductor body containing a vertically emitting quantum well structure for generating a vertical radiation field. The quantum well structure contains a plurality of quantum layers between which barrier layers are disposed, and the quantum layers are provided for optically pumping by a pump radiation field. The semiconductor device has a vertical resonator for the pump radiation field with a mirror layer disposed on the semiconductor body, the quantum well structure is disposed in the resonator.
Abstract: An optoelectronic device, comprising a package body (57) and at least one semiconductor chip (50) arranged on the package body (57). The surface of the package body (57) has a metallized subregion (15) and a non-metallized subregion (20). The package body (57) includes at least two different plastics (53, 54), one of the plastics being non-metallizable (54) and this plastic determining the non-metallized subregion (20). A method for producing such components and a method for the patterned metallization of a plastic-containing body are also provided.
Type:
Application
Filed:
March 1, 2004
Publication date:
November 25, 2004
Applicant:
Osram Opto Semiconductors GmbH
Inventors:
Thomas Hofer, Herbert Brunner, Frank Mollmer, Gunter Waitl, Rainer Sewald, Markus Zeiler
Abstract: The light source has an LED, preferably produced for the surface-mounting technique, embedded in a transparent material filling. A converter substance is integrated in the filling for the at least partial wavelength conversion of the light emitted by the LED. A lens is glued onto the transparent material filling. The material filling has a convex surface and the lens has a concave underside entering into a form fit with the convex surface of the material filling.
Abstract: A self-oscillating ballast inverter circuit for powering a gas discharge lamp. The circuit is used in a ballast inverter to compensate positive resonance frequency shift in the inverter load during lamp starting. The circuit built on low power components and incorporated in a DC to AC inverter, providing transient advance angle for inverter switching transistors (M1, M2). This angle advance is increased in proportion to incremental output inverter voltage that is above a selected threshold voltage. Therefore, the inverter operates above resonance frequency during lamp starting, avoiding transient cross conduction in transistors in the circuit. The feedback circuit limits voltage and current stresses that may destroy some ballast components over time. The circuit also generates a signal for a protection circuit that is activated if the lamp fails to start.
Abstract: The light-radiating semiconductor component has a radiation-emitting semiconductor body and a luminescence conversion element. The semiconductor body emits radiation in the ultraviolet, blue and/or green spectral region and the luminescence conversion element converts a portion of the radiation into radiation of a longer wavelength. This makes it possible to produce light-emitting diodes which radiate polychromatic light, in particular white light, with only a single light-emitting semiconductor body. A particularly preferred luminescence conversion dye is YAG:Ce.
Abstract: Arc tube (10) has a bulbous body (12) with a hollow center portion (14) and opposite ends (16, 18). Each of these ends has a cylindrical terminal-receiving section (20, 22) extending therefrom. The hollow center portion (14) has an internal length A and an internal diameter B that provides an aspect ratio of less than 5 and an outer surface area to inner surface area ratio, measured in square units, of less than 1.5. Electrodes (24) and (26) are hermetically sealed in the terminal-receiving sections (20, 22). The lamp uses less than 7 mgs of mercury. The low pressure operation allows the use of the arc tube in lamps without a shroud and the low mercury allow the lamp to pass TCLP requirement and be conventionally landfilled.
Type:
Grant
Filed:
February 4, 2003
Date of Patent:
November 2, 2004
Assignee:
Osram Sylvania Inc.
Inventors:
Nikolay Natchev, Lori R. Brock, Harold L. Rothwell, Jr.
Abstract: The present invention relates to a new method and apparatus for structure electrodes of electro-luminescent components used displays and the like. The electrodes are structured in such a way that its layers are protected during structuring and the components may be tightly packed together to improve display resolution.
Type:
Application
Filed:
May 21, 2004
Publication date:
October 28, 2004
Applicant:
Osram Opto Semiconductors GmbH, a corporation of Germany
Abstract: A method for the dissolution and purification of tantalum ore and synthetic concentrates is described. The method preferably uses ammonium bifluoride as the fluoride source in place of the hydrofluoric acid used in the conventional methods. Other fluoride compounds such as NaF, KF, and CaF2 may be used alone or in combination with ammonium bifluoride. The tantalum concentrate and fluoride source are combined with sulfuric acid to form a solution containing tantalum values and impurities. The tantalum values are then separated from the impurities by solvent extraction.
Type:
Application
Filed:
April 22, 2004
Publication date:
October 28, 2004
Applicant:
OSRAM SYLVANIA INC.
Inventors:
Raj P. Singh Gaur, Robert G. Mendenhall
Abstract: An electric arc detection apparatus and method is based on AC current rectification phenomena in air plasma that causes low frequency amplitude modulation of high frequency currents and voltages in the ballast when disconnecting the lamp (Lamp) from the electronic ballast with power applied. A protection circuit shuts off the inverter of the ballast so the duration of the arc is diminished so that the arc becomes almost non-visible. The protection circuit senses the input of the ballast inverter resonant tank, which is free of transients caused by resonance, detecting arc rectification frequency which is about 25-30 times less than the inverter carrier frequency, and turns on a switching device for stopping oscillations in the inverter. When the lamp (Lamp) is reconnected to the ballast, it resets the protection circuit and the ballast inverter restarts automatically.
Abstract: An embodiment of a computer-based method to graphically specify one or more encoder lines at which one or more nozzles of a print head is to release a droplet of an organic material includes:
Abstract: A semiconductor laser with a semiconductor body (1), which has a periodic arrangement of cutouts (2) or in which a period arrangement of semiconductor regions is formed, so that the radiation generated by the semiconductor laser is not capable of propagating within this periodic arrangement, the resonator (3) of the semiconductor laser being omitted from the periodic arrangement in the lateral direction. Furthermore, an optically pumped semiconductor device is disclosed with a vertical emitter (13) comprising a quantum well structure (7), which is pumped by means of a semiconductor laser of this type or into which the pump radiation of a pump radiation source is coupled by means of a corresponding waveguide (22).
Type:
Application
Filed:
March 1, 2004
Publication date:
October 21, 2004
Applicant:
Osram Opto Semiconductors GmbH
Inventors:
Peter Brick, Tony Albrecht, Norbert Linder, Wolfgang Schmid
Abstract: A high brightness green-emitting phosphor is described. The phosphor has the general formula:
(Y(1-x-y-z)GdxTbyLaz)BO3
where
0.01≦x≦0.4,
0.01≦y≦0.1, and
0<z≦0.2.
The phosphor exhibits an enhanced brightness under VUV excitation which is desirable for plasma display panels.
Abstract: A starting aid for a metal halide lamp uses iodine and an inert gas instead of mercury so that the entire metal halide lamp may be mercury-free. The starting aid is a UV enhancer that includes a UV-transmissive capsule with a cavity in which iodine and an inert gas are sealed, wherein the iodine emits UV radiation when excited to reduce a starting voltage of the lamp.
Type:
Grant
Filed:
September 24, 2001
Date of Patent:
October 19, 2004
Assignee:
Osram Sylvania Inc.
Inventors:
Walter P. Lapatovich, A. Bowman Budinger
Abstract: A polarization detector is described which contains a beam splitter, which disperses an incident light beam into partial beam paths. The partial beams pass though &lgr;/4 wafers and a cholesterol layer and impinge upon detectors. The polarization direction of the incident light beam can be measured by the polarization detector with the aid of the signal level of the detectors.
Abstract: A method for producing a surface mounting optoelectronic component comprises the following steps: readying a base body with the optoelectronic transmitter and/or receiver arranged in a recess of the base body, filling the recess of the base body with a transparent, curable casting compound, and placing the optical device onto the base body, whereby the optical device comes into contact with the casting compound.
Abstract: A substrate with banks having end channels is provided to advantageously allow excess fluid collecting on one part of the substrate to flow to another part of the substrate. An excess of fluid collecting in a particular area of the substrate may flow to an area of the substrate where it would not interfere with the manufacturing process. The end channels may be modified with wave breakers that act as buffers to redirect excess fluid and/or with capillary-force homogeneity enhancers that pull excess fluid away from other parts of the substrate. The end channels may also contain line-end reservoirs that provide additional room for excess fluid to collect.
Abstract: An LED array has a plurality of LED chains, which each have at least one LED and are connected in parallel. The LED array has at least one output for feeding back radiation generated to a power supply unit. Preferably, at least one reference LED chain is connected in parallel with the LED chains and a photosensitive component is provided, the photosensitive component detecting the radiation emitted by the reference LED chain. The photosensitive component generates a measurement signal in a manner dependent on the radiation generated by the reference LED chain, which signal serves for providing feedback to the power supply unit.
Abstract: An encapsulation procedure for an organic light emitting diode (OLED) device, especially for thin and therefore flexible substrates, is disclosed. The device is sealed hermetically against environmental and mechanical damage. The procedure includes the use of a thin cover lid holder and a substrate holder that are designed to handle thin substrates without damaging them. Thin substrates ensure sufficient mechanical flexibility for the OLED devices, and provides an overall thickness of less than 0.5 mm.
Type:
Grant
Filed:
September 28, 2001
Date of Patent:
October 12, 2004
Assignees:
Osram Opto Semiconductors GmbH, Institute of Materials Research and Engineering
Inventors:
Mark Auch, Ewald Guenther, Chua Soo Jin
Abstract: A codable electronic circuit arrangement, in particular an LED circuit arrangement (1), having a lead (3), via which electronic circuit elements (6) of the circuit arrangement, in particular LED components, can be driven by a drive circuit (2; 20; 21; 22). The lead (3) has a plurality of coding conductors (3c, 3d), which carry a code by means of a combination of electrically interrupted and electrically continuous coding conductors (3c, 3d), said code giving an indication of specific properties of the circuit arrangement.