Patents Assigned to Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
  • Drive circuit for an LED array
    Patent number: 6864867
    Abstract: A drive circuit for an LED array comprises a first LED cluster and at least one second LED cluster. A control loop is designed to drive a switch of the first LED cluster so as to achieve a constant mean value of the current (ILED) flowing through the first LED cluster the control loop being designed for also driving switches of the further LED clusters. The drive circuit also comprises a total current detection device (RMES) with the aid of which it is possible to determine an actual magnitude (UMess) which corresponds to the sum of the currents through at least two of the second LED cluster.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: March 8, 2005
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventor: Alois Biebl
  • Drive for a half-bridge inverter
    Patent number: 6847174
    Abstract: The selection of the dead time in the case of a half-bridge inverter influences the efficiency thereof. The optimal dead time, and thus the optimal switching-on time of a lower half-bridge transistor (T2) is accomplished according to the invention by virtue of the fact that switching on is delayed until the current in a level shift transistor (T3) has dropped below a given threshold. A further aspect of the invention consists in that the delay in switching on the lower half-bridge transistor (T2) is immediately suppressed whenever a charging current flows in a trapezoidal capacitor, and this is accompanied by the rise of the half-bridge output voltage (UHB) after the traversal of a minimum.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: January 25, 2005
    Assignee: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
    Inventor: Felix Franck
  • Discharge lamp with phosphor
    Publication number: 20050001533
    Abstract: Discharge lamp with phosphor A discharge lamp (1) having a discharge vessel (2) which surrounds a discharge medium which emits electromagnetic radiation in the VUV region when the lamp is operating has, on the inner side of the discharge vessel wall, a first phosphor layer, which faces the discharge medium and comprises a UVA component which can be excited by the VUV radiation and is intended to emit electromagnetic radiation in the UVA region. Moreover, the discharge lamp (1) has a second phosphor layer, which can be excited by the UVA radiation and is intended to emit electromagnetic radiation in the visible region. This second phosphor layer either lies beneath the first phosphor layer or is applied to the outer side of the discharge vessel wall. This results in a lower color locus shift compared to a conventional phosphor mixture which can be excited directly by VUV radiation. (FIG.
    Type: Application
    Filed: May 25, 2004
    Publication date: January 6, 2005
    Applicant: PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN mbH
    Inventors: Gunter Huber, Frank Jermann, Ulrich Muller, Martin Zachau
  • Low-pressure discharge lamp with a device for switching it off at the end of its service life
    Patent number: 6838813
    Abstract: The invention relates to a low-pressure discharge lamp, having a tubular discharge vessel made from glass, the free ends of which are closed off in a gas tight manner, two electrode systems (3) each having a filament (7), two supply conductors (5, 6) and a bead (8) of glass, the ends of the supply conductors (5, 6) being fused into the ends of the discharge vessel which have been closed off in a gas tight manner and, in order to be held in a region between the filament (7) and the discharge vessel fused seal (2), into the bead (8), and a device for switching off the lamp at the end of its service life, comprising a paste (9) which contains a metal hydride and is fitted to the bead (8). According to the invention, the bead (8) consists of a glass material which has a resistivity of greater 108 ?cm at 350° C.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: January 4, 2005
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventors: Bernhard Blohm, Kirsten Fuchs, Achim Hilscher, Peter Husslein, Gerald Hämmer, Andreas Maciejewski, Thomas Noll, Klaus Pankratz, Klaus Weingärtner
  • Method for operating at least one low-pressure discharge lamp and operating device for at least one low-pressure discharge lamp
    Publication number: 20040263096
    Abstract: The invention relates to a method for operating at least one low-pressure discharge lamp using an inverter, during the operation of the at least one low-pressure discharge lamp the occurrence of a rectifier effect in the at least one low-pressure discharge lamp being monitored in order to determine the end of its life. For the purpose of monitoring the rectifier effect of the at least one low-pressure discharge lamp, the DC voltage drop across the electrical connections of the at least one low-pressure discharge lamp and the current through the at least one low-pressure discharge lamp are evaluated.
    Type: Application
    Filed: April 27, 2004
    Publication date: December 30, 2004
    Applicant: PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN MBH
    Inventor: Jorg Lott
  • Circuit arrangement for operating discharge lamps
    Patent number: 6833678
    Abstract: Circuit arrangement for operating discharge lamps (LP), having the following features: A power factor correction device (PFC) provides an intermediate circuit voltage; an inverter (INV), which draws its power from the intermediate circuit voltage, outputs power to discharge lamps (LP). According to the invention, an oscillation of the power factor correction device (PFC) only takes place when it is started, by means of a starting device (TRG), by an oscillation of the inverter (INV). This provides cost-effective control of the sequences in the circuit arrangement.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: December 21, 2004
    Assignee: Patent Treuhand Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Siegfried Mayer, Arwed Storm
  • Packaging for a lamp and method for packaging a lamp
    Publication number: 20040252513
    Abstract: The invention relates to packaging for a lamp (2) having an inner part (1), which has a recess (11) for the lamp (2) which is matched in an interlocking manner to the outer contour of the lamp (2) such that the interlocking design of the recess (11) causes the lamp (2) to be anchored in the recess (11).
    Type: Application
    Filed: May 5, 2004
    Publication date: December 16, 2004
    Applicant: Patent-Treuhand-Gesellschaft fur Elektrische Gluhlampen mbH
    Inventors: Gerhard Hagel, Manfred Reinhardt, Dieter Helmut Schonlein
  • Discharge lamp having two-band phosphor
    Publication number: 20040251807
    Abstract: A discharge lamp (1) having a discharge vessel (2) that surrounds a discharge medium that emits electromagnetic radiation in the VUV region during operation of the lamp, has on the inner side of the discharge vessel wall a yellow phosphor layer facing the discharge medium, and a blue phosphor layer lying therebelow.
    Type: Application
    Filed: June 2, 2004
    Publication date: December 16, 2004
    Applicant: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Gunter Huber, Frank Jermann, Ulrich Muller, Martin Zachau
  • Lamp which is closed on two sides
    Publication number: 20040251834
    Abstract: The elongate bulb (1) of the lamp, which defines a longitudinal axis (A), is closed at opposite ends by sealing parts (6; 32), with in each case one cap being fitted at one end, the cap having an electrical contact element (13; 25) which is connected in an electrically conductive manner to a supply conductor (15; 21) leading to a luminous means, the contact element being accommodated in a tubular extension (11; 22) of the sealing part; the contact element (13; 25) has an attachment part (14; 24) which is directed inward toward the lamp interior and is equipped with at least two barbs (20; 26) which are in contact with the tubular extension (11; 21).
    Type: Application
    Filed: May 28, 2004
    Publication date: December 16, 2004
    Applicant: Patent-Treuhand-Gesellschaft fur Elektrische GluhlAMPEN mbH
    Inventors: Jurgen Graf, Andreas Hohlfeld, Michael Hulsemann, Anton Schlogl, Karen Twesten
  • Operating circuit with an improved power supply for a driver circuit
    Patent number: 6831422
    Abstract: The invention relates to the supply of power to a driver circuit (V) for a switching transistor (T) in an operating circuit, in particular for lamps. The supply is provided via a pump circuit with a potential isolation capacitor (C2), two rectifier diodes (D1, D2) and an energy-storage capacitor (C1), and is independent of the reference ground potential of the switching transistor (T).
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: December 14, 2004
    Assignee: Patent Treuhand Gesellschaft fur elektrische Gluhlampen mbH
    Inventor: Walter Limmer
  • Controllable lighting system with a second communication protocol and appliances for this purpose
    Publication number: 20040245943
    Abstract: The invention relates to an electronic ballast and to a controller which drives this ballast, in which two communication protocols are provided for the digital drive.
    Type: Application
    Filed: May 12, 2004
    Publication date: December 9, 2004
    Applicant: PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN MBH
    Inventor: Andreas Huber
  • Discharge lamp operating circuit with a current regulation circuit and a circuit for detection of the proximity to capacitive operation
    Patent number: 6828737
    Abstract: The invention relates to an operating circuit for a discharge lamp with a current regulation circuit for regulating the lamp current and a detection circuit for identifying proximity to capacitive operation of the load circuit. The operating circuit is designed to reduce the nominal current value on identifying proximity to capacitive operation.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: December 7, 2004
    Assignee: Patent Treuhand Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Olaf Busse, Markus Heckmann
  • Lamp having a rotatable base
    Publication number: 20040233669
    Abstract: The invention relates to an electric lamp (1) comprising at least one vessel (3) for producing and emitting visible electromagnetic radiation, a base (9) for securing and making electrical contact with the lamp (1) in a luminaire fitting, and a connecting part which connects the base to one of the remaining parts of the lamp (1). The connecting part is in this case in the form of a rotationally symmetrical rotary device (8) which makes it possible for the remaining parts of the lamp (1) to be rotated with respect to the base (9), when the base (9) is secured in the fitting, about the axis of the lamp (1).
    Type: Application
    Filed: April 19, 2004
    Publication date: November 25, 2004
    Applicant: PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN mbH
    Inventors: Klaus Fischer, Andreas Jakob
  • Incandescent lamp for motor vehicle headlights
    Patent number: 6822392
    Abstract: The invention relates to an incandescent lamp for a motor vehicle headlight. The secondary filament (2) is arranged in such a way that, in a projection plane that is arranged perpendicular to the reference plane (B), the edge (2a), facing the antidazzle device (4), of the image, projected onto the projection plane, of the second incandescent filament (2) is arranged over the entire length of the second incandescent filament (2) between the reference axis (A) and the antidazzle device (4), and the edge (2a), facing the antidazzle device (4), of the image, projected to the scale 1:1 onto the projection plane, of the second incandescent filament (2) has a prescribed spacing from the reference axis (A). It is thereby possible to produce the light/dark boundary for the lower beam with the aid of the edge (2a) of the secondary filament image (2).
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: November 23, 2004
    Assignee: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Gerhard Behr, Manfred Bühler, Christian Seichter, Klaus Wittmann
  • Lamp for generating colored light
    Publication number: 20040222727
    Abstract: The invention relates to a lamp comprising a transparent envelope having a first region defining an enclosed interior volume, and a closure region adjacent said first region, a light source located in said interior volume and electrically coupled to the exterior through said closure region, an interference filter coating formed on the exterior of said first region, said interference filter coating defining a spectral region of transparency, a light absorbing coating formed on the exterior of said first region, wherein said light absorbing coating comprises a ring-shaped portion having a layer thickness of at least 20 nanometer.
    Type: Application
    Filed: May 6, 2004
    Publication date: November 11, 2004
    Applicants: DESPOSITION SCIENCES INC., PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN MBH
    Inventors: Reinhard Schaefer, Robert Nichols, Florence Taitel
  • Operating device and method for operating gas discharge lamps
    Publication number: 20040217717
    Abstract: The ignition of a gas discharge lamp is followed by a warm-up phase. During warm-up, sufficient power must be converted to enable the lamp to transition to an operating phase. This causes currents flowing at a damaging level into the electrodes in known devices. These high currents are avoided using: a regulation device that regulates the power of connected gas discharge lamps to a desired power; a setting device that limits a lamp current of connected gas discharge lamps to a limit value; a detection device that outputs a signal to the control device if a limit value setting is too low, putting a connected lamp into a state in which the lamp assumes the desired power; and a control device prescribing the limit value for the setting device and increasing the limit value if the detection device sends a signal to the control device.
    Type: Application
    Filed: April 23, 2004
    Publication date: November 4, 2004
    Applicant: PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN MBH
    Inventors: Christian Breuer, Andreas Huber, Ralf Weidemann
  • Infrared radiator and irradiation apparatus
    Publication number: 20040211927
    Abstract: The invention relates to an infrared radiator, whose radiation source is a luminous element emitting light and IR radiation, and whose vessel which surrounds said luminous element is coated with an interference filter which is transparent only to infrared radiation from a specific subrange from the wavelength range of 700 nm to 3500 nm. Electromagnetic radiation outside the subrange is reflected back into the vessel.
    Type: Application
    Filed: April 16, 2004
    Publication date: October 28, 2004
    Applicant: PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN MBH
    Inventor: Hans-Joachim Schmidt
  • Transport tape
    Publication number: 20040206665
    Abstract: A transport tape for accommodating electronic or optoelectronic components is disclosed, having a multiplicity of pockets for accommodating the components and a multiplicity of pivotable or displaceable lids for closing the pockets.
    Type: Application
    Filed: March 25, 2004
    Publication date: October 21, 2004
    Applicant: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
    Inventor: Richard Lang
  • Device for operating discharge lamps
    Patent number: 6806657
    Abstract: A device for operating a plurality of discharge lamps (71, 72) is to be fashioned cost effectively. Two lamps (71, 72) are therefore operated in a single load circuit. In the preheating phase, the incandescent filaments (711, 712, 721, 722) are supplied with preheating current either directly or via a transformer (Ls, Lp). The preheating current is controlled via a temperature-dependent resistor (PTC) in such a way that the continuous heating current is greatly reduced over all the filaments during the operation of the lamp.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: October 19, 2004
    Assignee: Patent Treuhand Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Bernd Rudolph, Harald Schmitt
  • Operating circuit for a discharge lamp with early EOL detection
    Patent number: 6803731
    Abstract: The invention relates to a novel operating circuit for a low-pressure discharge lamp 1 with early EOL detection via a measurement of the DC voltage between the electrodes 2, 3. In this case, the DC voltage can be modified by an offset voltage 10 such that only one polarity has to be taken into account during measurement.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: October 12, 2004
    Assignee: Patent Treuhand Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Martin Grabner, Markus Heckmann