Abstract: A ballast resonant inverter with a self-oscillating driver IC powers and dims a gas discharge lamp. A feedback circuit automatically adjusts IC oscillator frequency for safe and stable inverter operation above the resonant frequency following changes in the resonant load. The feedback signal is derived from resonant inverter output voltage, by attenuating, programmed phase shifting and injecting the resulting signal in a timing circuit of the IC. The feedback circuit includes an active inverter circuit or passive RC phase boosting networks coupled in series. Phase control of the feedback signal by variable RC networks is used in transient modes of ballast-lamp operations.
Abstract: A high frequency, right angle socket (10) comprising a body (12) including a longitudinal bore (14) extending completely through the body (12) and a transverse bore (16) intersecting the longitudinal bore (14). The bores (14) and (16) are seem most clearly in FIG. 5. A first dielectric (18) is formed to frictionally engage the longitudinal bore (14). The dielectric (18) has a proximal end (26) and a distal end (22) and includes a longitudinal electric contact-receiving chamber (24). A right angle electrical contact (26) has a longitudinal portion (28) and a transverse portion (30). The longitudinal portion (28) includes a first contact retainer (32). The transverse portion (30) includes a contact retainer (33). The longitudinal portion (28) is fitted into the longitudinal electrical contact-receiving chamber (24) of the first dielectric (18) with the contact retainer (32) on the longitudinal portion (28) engaging the interior wall of the longitudinal contact-receiving chamber (24).
Type:
Grant
Filed:
December 16, 2003
Date of Patent:
June 14, 2005
Assignee:
Osram Sylvania, Inc.
Inventors:
Michael J. Swantner, Shane Brown, John Sherry
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.
Abstract: A self-ballasted fluorescent lamp (10) that comprises a housing (12) formed to contain a ballast. The housing (12) has a top surface (14) with openings (16) leading from the exterior of the housing (12) to the interior. The openings (16) can be in the form of raised bosses having upstanding walls (16a). A restricted portion (18), which can take the form of a flange, is formed with the opening (16) and a safe end-of-life enabling device (20) is positioned in the opening (16) and in contact with the restricted portion (18). The safe end-of-life device (20) is tubular, has low thermal conductivity and in preferred forms of the invention is a glass such as quartz or a ceramic such as aluminum oxide. The ends (22) of a fluorescent lamp (24) penetrate the tubular end-of-life device (20) and extend into the interior of the housing for suitable connection to an enclosed electronic ballast. A retainer (26) is positioned opposite the restricted portion for maintaining the end-of-life device within the opening.
Abstract: A ballast (10) for powering at least one gas discharge lamp (52) from a three-phase AC voltage source (30) comprises a three-phase rectifier circuit (200), a high frequency filter capacitor (300), and a high frequency inverter (400). Preferably, three-phase rectifier circuit (200) is implemented by a six-diode bridge, and high frequency filter capacitor (300) can be realized by a film capacitor or a ceramic capacitor. Ballast (10) provides a high power factor and low total harmonic distortion without requiring a dedicated power factor correction circuit. Other benefits of ballast (10) include enhanced efficiency, longer life, and lower inrush current.
Type:
Grant
Filed:
September 29, 2003
Date of Patent:
June 14, 2005
Assignee:
Osram Sylvania, Inc.
Inventors:
Grigoriy A. Trestman, Joseph L. Parisella, Richard H. Koeppl
Abstract: A lamp which includes a fixed phase power controller connected between a terminal and a light emitting element converts line voltage to an RMS load voltage. The controller has an analog control block that receives an input that is independent of a change in magnitude of the line voltage and that charges and discharges to provide a trigger signal at a first frequency, a reset circuit that periodically resets an initial condition of said analog control block, a synchronization connection that provides a sync signal that synchronizes the trigger signal with a waveform of the line voltage, and a control circuit that is connected to said terminal and to said analog control block and that clips a load voltage based on the synchronized trigger signal to define the RMS load voltage.
Abstract: An organic layer (1) is applied to a transparent carrier (2) in such a way that different partial regions with different refractive indices are formed in the layer. Owing to deflection at the phase boundaries within the layer, fewer photons remain trapped in the layer as a result of wave-guiding losses than in the case of homogeneous layers.
Type:
Application
Filed:
November 27, 2002
Publication date:
June 9, 2005
Applicant:
Osram Opto Semiconductors GmbH
Inventors:
Jan Birnstock, Jorg Blassing, Karsten Heuser, Marcus Scheffel, Matthias Stossel, Georg Wittmann
Abstract: A fixed phase power controller that converts a line voltage to an RMS load voltage includes an analog control block with a capacitor that receives an input that is independent of a change in magnitude of the line voltage and that charges and discharges to provide a trigger signal at a first frequency, a reset circuit that periodically resets an initial condition of the analog control block, a synchronization connection that provides a sync signal that synchronizes the trigger signal with a waveform of the line voltage, and a control circuit that clips a load voltage based on the synchronized trigger signal to define the RMS load voltage. The controller finds application in a lamp where it reduces the line voltage to an RMS load voltage suitable for a light emitting element.
Abstract: A technique for fabricating an epitaxial component layer sequence based on a first III/V compound semiconductor material system with a first group V element on a substrate or a buffer layer, which comprises a material based on a second III/V compound semiconductor material system with a second group V element, which is different from the first group V element. At least one layer sequence with a first and a second III/V compound semiconductor material layer is applied to the substrate or to the buffer layer before the application of the epitaxial component layer sequence, the first and second III/V compound semiconductor material layers having different compositions from one another and containing both the first and the second group V elements.
Type:
Application
Filed:
September 28, 2004
Publication date:
June 2, 2005
Applicant:
Osram Opto Semiconductors GmbH
Inventors:
Alexander Behres, Norbert Linder, Bernd Mayer
Abstract: A low insertion force seating grommet assembly (10a) has a hollow body (12) arrayed along a longitudinal axis (14). The body (12) has a wide end (16) and a narrow end (18) connected by an intermediate portion (20). The narrow end (18) has a cylindrical aperture (18a) and the wide end (16) has a cup-shaped aperture (16a). A flange (22) surrounds the wide end (16) and is provided with a wall-opening engaging portion (24). Longitudinally extending relief grooves (26) are formed on the internal surface (28) of the cup-shaped aperture (18a). A cable (32) is frictionally engaged in the cylindrical aperture and penetrates the cup-shaped aperture. A cover (30) closes the cup-shaped aperture. The cable enters the cover along the longitudinal axis and exits the cover at an angle of 90 degrees relative to the longitudinal axis.
Abstract: An optoelectronic component having a basic housing or frame (12) and at least one semiconductor chip (20), specifically a radiation-emitting or -receiving semiconductor chip, in a cavity (18) of the basic housing. In order to increase the efficiency of the optoelectronic component (10), reflectors are provided in the cavity in the region around the semiconductor chip. These reflectors are formed by virtue of the fact that a filling compound (28) filled at least partly into the cavity (18) is provided, the material and the quantity of the filling compound (28) being chosen in such a way that the filling compound, on account of the adhesion force between the filling compound and the basic housing, assumes a form which widens essentially conically from bottom to top in the cavity, and the conical inner areas (30) of the filling compound serve as reflector.
Type:
Grant
Filed:
June 27, 2003
Date of Patent:
May 31, 2005
Assignee:
Osram Opto Semiconductors GmbH
Inventors:
Marcus Ruhnau, Bert Braune, Patrick Kromotis, Georg Bogner
Abstract: A semiconductor component for generating a polychromatic electromagnetic radiation has a semiconductor chip with a first semiconductor layer and a second semiconductor layer, which is provided adjacent to the first semiconductor layer and has an electroluminescent region. The electroluminescent region emits electromagnetic radiation of a first wavelength. The first semiconductor layer includes a material which, when excited with the electromagnetic radiation of the first wavelength, re-emits radiation with a second wavelength which is longer than the first wavelength.
Abstract: Method for defining the color group of an LED which emits mixed-color, in particular white, light. The CIE color space is divided by means of a network with two sets of intersecting network lines, one set being provided by a set of Judd straight lines and the other set by the line for the color loci of a Planckian radiator and also the associated lines of constant threshold value deviation, so that the network has a plurality of network cells bounded by network lines. The color locus of the LED is determined, and the network cell is determined in which the color locus of the LED is located. The LED is assigned to the color group of the network cell.
Type:
Grant
Filed:
April 14, 2003
Date of Patent:
May 31, 2005
Assignee:
Osram Opto Semiconductor GmbH
Inventors:
Markus Wicke, Christian Hacker, Burkard Wiesmann, Joachim Reill
Abstract: A light-emitting semiconductor component has a semiconductor element containing an active layer, electrical contacts for impressing a current into the active layer (heat being generated at the active layer and at the electrical contacts during operation), and a carrier with a large thermal capacity for absorbing the heat generated during operation. The rear side of the semiconductor element is (electrically and/or thermally) connected to the carrier by a adhesive. Recesses, which accommodate a part of the adhesive when the semiconductor element is connected to the carrier, are provided in the rear side of the semiconductor element.
Abstract: A method of converting a line voltage to an RMS load voltage in a lamp includes modulating a load voltage with a pulse width modulation circuit that is entirely within the lamp and provides an RMS load voltage to a light emitting element of the lamp. Conduction is triggered in the pulse width modulation circuit independently of a line voltage magnitude with a time-based signal source that defines a duty cycle of the pulse width modulation circuit suitable for the RMS load voltage.
Abstract: A phase-control power controller that converts a line voltage to an RMS load voltage includes a phase-control circuit with a potentiometer and a capacitor whose resistance and capacitance determine clipping of a load voltage, a load sensing circuit that senses the load voltage and provides a DC signal that is different from but related to the RMS load voltage, and a comparator circuit that compares the DC signal to a reference and adjusts the resistance of the potentiometer to control the RMS load voltage.
Abstract: A lamp contains a lamp voltage conversion circuit that is entirely within a base for converting a line voltage at a lamp terminal to an RMS load voltage at a light emitting element. The voltage conversion circuit includes a forward clipping circuit with a three-terminal thyristor that forward clips a load voltage to define the RMS load voltage, and a time-based pulse source that provides pulses the trigger conduction of the three-terminal thyristor at constant time intervals that are independent of the magnitude of the line voltage.
Abstract: A lamp includes a phase-control power controller within the lamp. The phase-control power controller includes an analog load voltage sensor that provides an optical output related to an RMS load voltage and a phase-controlled dimming circuit that has a comparison circuit that varies a resistance in the phase-controlled dimming circuit responsive to the optical output from the load voltage sensor.
Abstract: A method of converting a line voltage to an RMS load voltage in a lamp includes performing fixed forward phase-control clipping of a load voltage with a phase-control clipping circuit that provides an RMS load voltage to the lamp and providing pulses at constant time intervals from a time-based pulse source. conduction in a three-terminal thyristor in the phase-control clipping circuit is triggered with the pulses from the time-based pulse source independently of the line voltage magnitude, wherein periods of conduction in the three-terminal thyristor define a conduction angle of the phase-control clipping circuit.