Patents Assigned to Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
  • Patent number: 7382208
    Abstract: The operating method is based on the simultaneous application of FM and AM. In this process, the fundamental frequency of the AM is derived from at least one, preferably the second, longitudinal mode. In continuous operation of the lamp, the color temperature is set for a prescribed power by setting the AM degree controllably.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: June 3, 2008
    Assignee: Patent-Treuhand-Gesellschaft für Elektrische Glühlampen MbH
    Inventor: Klaus Stockwald
  • Patent number: 7358673
    Abstract: The bulb of the lamp is closed at opposite ends by sealing parts (6), with in each case one cap (8) being fitted at one end, the cap having an electrical contact element (13) which is connected in an electrically conductive manner to a supply conductor (15) leading to a luminous means, the contact element being accommodated in a tubular extension (11) of the sealing part. The cap part (8) has an adjustment part (14; 24), which is directed inward with respect to the interior of the lamp and is in contact with the sleeve (11) via a bracket.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: April 15, 2008
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventors: Lambert Frye, Jürgen Gräf, Karl Röder, Bernhard Ulbrich
  • Patent number: 7355356
    Abstract: The invention relates to a circuit arrangement for detecting a crest factor of a lamp current or a lamp operating voltage of an electric lamp (2), the circuit arrangement having a first subcircuit (15), which is designed to determine an averaged value from an input signal applied to the circuit arrangement, having a second subcircuit (16), which is designed to determine a maximum permissible value from the input signal applied to the circuit arrangement and having a comparator circuit (17), which is designed to produce a comparison signal from the output signal of the first subcircuit (15) characterizing the averaged value and from an output signal of the second subcircuit (16) characterizing the maximum permissible crest factor. The invention also relates to a method for detecting such a crest factor. One further aspect of the invention relates to an electronic ballast (1) which has a circuit arrangement (14a, 14b) according to the invention.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: April 8, 2008
    Assignee: Patent-Treuhand-Gesellschaft für Elektrische Glühlampen mbH
    Inventor: Thomas Mudra
  • Patent number: 7355351
    Abstract: Circuit arrangement having a converter without a transformer but with an inductor for the pulsed operation of dielectric barrier discharge lamps The circuit arrangement according to the invention comprises an inductor-type converter for the pulsed operation of dielectric barrier discharge lamps (EL). The invention proposes both a half bridge variant and a full bridge variant. By selecting the inductance value of the inductor (L), it is possible to influence the edge steepness of the pulses, in the case of more than one inductor even independently for the rising and falling edges.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: April 8, 2008
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventors: Karl Kyrberg, Arnulf Rupp, Oskar Schallmoser
  • Patent number: 7355348
    Abstract: The invention relates to a novel ballast for a discharge lamp, in which a continuous-operation control circuit is brought out of operation when a physical operation, which defines a preheating time, of a preheating timer has as yet not been sufficiently returned if the lamp is intended to be restarted.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: April 8, 2008
    Assignee: Patent-Treuhand-Gesellschaft für Elektrische Glühlampen mbH
    Inventor: Bernd Rudolph
  • Patent number: 7352119
    Abstract: The invention relates to a method for designing a discharge lamp for use with a light-gathering system, in particular of a projector for data or video projection. Also disclosed are a lamp designed using such a method and a reflector provided therefore.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: April 1, 2008
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventor: Henning Rehn
  • Patent number: 7345412
    Abstract: An electric lamp having a base at one end, a lamp bulb sealed in a vacuum-tight manner, the lamp bulb being surrounded by an envelope part, a base having electrical connections bearing on one side the outer bulb and on the other side the envelope part, having the following features: a) the base has a base insulator which has a central opening in which the outer bulb is accommodated without cement; b) the base insulator has a circular, radially projecting segment having an upper and lower plateau which is associated with the base; c) on the base side the envelope part has a circular opening having a radially projecting edge which has a lower and an upper contact surface in relation to the base, the lower contact surface matching the upper plateau; and d) the envelope part is fixed to the base via a cement-free, mechanical retaining mechanism.
    Type: Grant
    Filed: July 21, 2005
    Date of Patent: March 18, 2008
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventors: Joachim Arndt, Uwe Fidler, Markus Herb
  • Patent number: 7345413
    Abstract: A coated luminescent material having a luminescent material powder formed by grains, the luminescent grains being coated, and the coating being at most 5 nm, preferably at most 2 nm.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: March 18, 2008
    Assignees: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, Osram Opto Semiconductors GmbH
    Inventors: Bert Braune, Martin Zachau, Franz Zwaschka
  • Patent number: 7341469
    Abstract: An adapter for providing a recessed lamp in a screw-type lampholder. This adapter has an electrical contact-making device, via which an electrical connection is produced between a screw base, which can be introduced into the screw-type lampholder, of the adapter and the recessed lamp once the recessed lamp has been introduced into the adapter. Furthermore, the adapter has a switchable electrical connecting device, via which, in the state in which there is no mechanical connection between an enveloping bulb for the recessed lamp and the adapter, an electrical connection is not produced between the screw base and the recessed lamp, and via which, in the state in which the recessed lamp is surrounded, at least in sections, by the enveloping bulb, an electrical connection is produced between the screw base and the recessed lamp. As a result, the recessed lamp in the adapter can only be operated with the enveloping bulb placed thereon.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: March 11, 2008
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventor: Lambert Frye
  • Patent number: 7339157
    Abstract: An illumination device, comprising a light emitting diode (11) fixed on a circuit board (12). The illumination device furthermore has an optical element (10) disposed downstream of the light emitting diode (11) in a main emission direction (15), the optical element (10) being configured for directing a first portion (6a) of the electromagnetic radiation (9) emitted by the light emitting diode (11) during operation through the circuit board (12) in a direction away from the circuit board (12).
    Type: Grant
    Filed: January 11, 2007
    Date of Patent: March 4, 2008
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventor: Alexander Faller
  • Patent number: 7330001
    Abstract: A ballast having a dimming device for a low-pressure discharge lamp. It has two technically different possibilities for controlling the lamp brightness. The first possibility for controlling the lamp brightness is by means of adjusting the amplitude of the lamp current. The second possibility for brightness control is based on the fact that the low-pressure discharge lamp can be operated with a pulsed lamp current. In particular, both operating modes are used in combination in specific brightness ranges.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: February 12, 2008
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventors: Klaus Fischer, Josef Kreittmayr
  • Patent number: 7323820
    Abstract: The metal halide lamp has a ceramic discharge vessel and contains two groups of metal halides: a first group made up of the emitters and a second group made up of the wetters. The second group comprises at least one of the metal halides of Mg or Yb.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: January 29, 2008
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventors: Stefan Jüngst, Klaus Stockwald
  • Patent number: 7319294
    Abstract: In the metal halide high-pressure discharge lamp for stage, film and television lighting systems and for projection technology and effect lighting, the discharge vessel contains dysprosium and cesium as fill metals for the metal halides. Optimum results for dimmability, arc instability and color rendering are achieved if the fill additionally includes 0.12 to 3.8 ?mol of vanadium and if appropriate 0.05 to 1.0 ?mol of zirconium per ml of vessel volume. These metals achieve improved color rendering, in particular red rendering, with an Ra of from 70 to 95 and an R9 of from 45 to 90.
    Type: Grant
    Filed: June 6, 2006
    Date of Patent: January 15, 2008
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventor: Hans-Werner Golling
  • Patent number: 7309963
    Abstract: The present invention relates to an electronic ballast for discharge lamps, for example low-pressure discharge lamps, having a converter having a switching element and a two-part lamp inductor which is connected upstream and downstream of the discharge lamp. An electronic ballast according to the invention has a smoothing circuit which reduces voltage jumps caused by switching operations in the converter at the lamp terminals.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: December 18, 2007
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventors: Olaf Busse, Markus Heckmann, Reinhard Lecheler, Alfons Lechner, Siegfried Mayer, Thomas Pollischansky, Bernd Rudolph, Bernhard Schemmel, Kay Schmidtmann, Harald Schmitt, Thomas Siegmund, Arwed Storm, Horst Werni
  • Patent number: 7309455
    Abstract: The invention relates to a phosphor composition for lamps with a lattice of monoclinic crystal structure (monazite) of type (1?g)[((1?c?a)*Ln, c*Ce, a*A)PO4]×g*GeO2, in which Ln is at least one element selected from the group consisting of lanthanum La, gadolinium Gd and/or Yttrium Y and A is at least one activator selected from the group consisting of terbium Tb, praseodymium Pr and/or europium Eu, and 0?a?1.0; 0?c?1.0, and 0<g?0.2.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: December 18, 2007
    Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
    Inventors: Tim Fiedler, Gunter Huber, Ulrich Muller, Martin Zachau
  • Patent number: 7307387
    Abstract: A voltage converter, whose topology can be switched over between a boost converter and a SEPIC. The boost converter has ripple current compensation. As a result, the inductors used can be utilized in optimum fashion. A thyristor which is protected against breakdown triggering by a negative gate voltage is used as the changeover switch.
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: December 11, 2007
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventor: Arwed Storm
  • Patent number: 7298071
    Abstract: In a discharge lamp having a discharge vessel and external electrodes, at least one electrode similar to a conductor track is an integral part of a laminate (5) which is adhesively bonded to the outer side of the discharge vessel and includes a carrier film made of electric insulating material.
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: November 20, 2007
    Assignee: Patent - Treuhand - Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventors: Lothar Hitzschke, Frank Vollkommer
  • Patent number: 7291979
    Abstract: In the dielectric barrier discharge lamps according to the invention, the elongate, for example strip-like or linear, electrodes are each separated into two electrode elements (14a, 14b; 15a, 15b) by a gap in the longitudinal direction. This makes it possible, as intended, to operate one element (14a, 15a) of the electrode elements separately from the other element (14b, 15b) and, as a result, to cause either only one part of the lamp to illuminate or the entire lamp. For this purpose, one element (14a, 15a) of the electrode elements is connected to a first operating device (22), and the other element (14b, 15b) to a second operating device (21).
    Type: Grant
    Filed: February 8, 2005
    Date of Patent: November 6, 2007
    Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventor: Gerhard Doll
  • Patent number: 7288894
    Abstract: An electric lamp has a discharge vessel which is sealed in a vacuum-tight manner and is made from glass, the discharge vessel being surrounded in particular by an envelope part, the discharge vessel being essentially cylindrical, and defining a longitudinal axis L, and containing two electrodes at a predetermined distance from one another as well as a filling, an electrically insulated insert part also being fitted in the discharge vessel over a central part of the axial length. The electrically insulated insert part extends at least over the distance between the electrodes EA, it is fitted in the discharge vessel without the use of a retaining device, and it surrounds the electrodes in essentially tubular fashion such that it is spaced apart from them.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: October 30, 2007
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventor: Jürgen Gräf
  • Patent number: 7288900
    Abstract: An illumination system has at least two light sources of which at least one light source includes an LED, and a driver device designed to operate at least the one LED with a DC signal; a sensor device for determining at least one feature of the light output; an actual value storage device connected to the sensor device for storing an actual value of the feature; a setpoint selection device for storing a setpoint of the feature; and a control device connected on the input side to the actual value storage device for of transmitting the actual value, and to the setpoint selection device for transmitting the setpoint, and which provides the driver device with a control signal that changes a characteristic of the DC signal used for driving the LED such that the actual value approaches the setpoint.
    Type: Grant
    Filed: September 6, 2005
    Date of Patent: October 30, 2007
    Assignee: Patent-Treuhand-Gesellschaft für Elektrische Glühlampen mbH
    Inventors: Alois Biebl, Stefan Hackenbuchner, Gunther Hirschmann, Reinhard Weitzel