Patents Assigned to Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
  • Patent number: 6972519
    Abstract: The invention relates to a preferably large-format image display device that is constructed from a plurality of individual silent gas discharge lamps.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: December 6, 2005
    Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventors: Udo Custodis, Michael Seibold
  • Patent number: 6969950
    Abstract: Sealing foil for making a lamp (1), comprising a metallic base body made from molybdenum and a coating which has been applied to at least part of the base body and which contains chromium, rhenium or ruthenium, alone or as an alloy, the foil being formed as a stack comprising two parts (10, 11) which have a different coating.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: November 29, 2005
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventors: Franz Breuer, Axel Bunk, Bodo Mittler
  • Patent number: 6960874
    Abstract: A dielectric barrier discharge lamp (1) having a tubular discharge vessel (2) and a luminescent material layer on at least a part of the inner wall of the discharge vessel (2) and having elongate electrodes (3) is provided with a coating (10) on a partial region of the inner wall at least at one end of the tubular discharge vessel (2), which coating additionally covers an end of at least one elongate electrode (3) . The material of the coating (10) has a high secondary electron emission coefficient. As a result, the ignition behavior of the lamp is improved, in particular during ignition in darkness.
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: November 1, 2005
    Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventor: Gerhard Döll
  • Patent number: 6946797
    Abstract: A metal halide fill for forming an ionizable fill comprising at least one inert gas, mercury, and at least one halogen, the fill additionally comprising the following constituents: Mn halide and V halide. This fill may in particular be present in the discharge vessel of a metal halide lamp.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: September 20, 2005
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventor: Hans Eisemann
  • Patent number: 6901772
    Abstract: A method for producing containers for gas discharge lamps, which consists in melting glass by incident light radiation.
    Type: Grant
    Filed: July 28, 2000
    Date of Patent: June 7, 2005
    Assignee: Patent-Treuhand-Gesellschaft für Elektrische Glühlampen mbH
    Inventors: Angela Eberhardt, Michael Ilmer, Michael Seibold
  • Patent number: 6897611
    Abstract: The invention relates to the capacitive modulation of the field distribution in a silent discharge lamp 1, by a structured, electrically conductive device 2 for definition of preferred locations for discharge structures in the lamp 1.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: May 24, 2005
    Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventors: Lothar Hitzschke, Frank Vollkommer
  • Patent number: 6879108
    Abstract: A discharge lamp, suitable for operation by means of dielectrically impeded discharge, having a discharge vessel with two at least partially parallel vessel walls (2; 7), and at least one spacer (1) made from optically transparent insulating material. The or each spacer (1) is in contact with the two vessel walls (2; 7) via bearing surfaces. The or each spacer has an optically diffuse surface (8) at least in the region of one bearing surface.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: April 12, 2005
    Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventors: Michael Ilmer, Angela Eberhardt, Michael Seibold
  • Patent number: 6879102
    Abstract: The invention relates to an incandescent lamp for motor vehicle headlights, having at least one incandescent filament (2) arranged inside the lamp vessel, and a shading device (4). A coil exit (2a) of the incandescent filament (2) is joined to an edge section (41) of the shading device (4) running substantially parallel to the coil axis, in order to ensure an improved suspension of the incandescent filament (2).
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: April 12, 2005
    Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
    Inventors: Gerhard Behr, Manfred Bühler, Christian Seichter, Klaus Wittmann
  • Patent number: 6873122
    Abstract: An apparatus for operating a plurality of discharge lamps is to be designed so as to be more cost-effective. A first current control device, in particular a heat-sensitive resistor having a positive temperature coefficient, is connected in parallel with a first contact device for electrically connecting a first discharge lamp. Furthermore, a second contact device for electrically connecting a second discharge lamp is connected in parallel with a second current control device, the first and second contact devices being connected in series. A defined preheating period for the lamps can therefore be achieved. By using a sequential starting capacitor in parallel with one of the lamps, impermissible load current surges may be avoided.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: March 29, 2005
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventor: Harald Schmitt
  • 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
  • Patent number: 6853124
    Abstract: A flat fluorescent lamp (1) has a discharge vessel (2) having a base plate (7), a top plate (8) and a frame (9) which are connected to one another in a gas-tight fashion by means of solder (10). Structures resembling conductor tracks function in the interior of the discharge vessel as electrodes (3-6), in the feedthrough region as feedthroughs, and in the external region as external supply leads (13; 14). Flat lamps of the most different sizes can thereby be produced simply in engineering terms and in a fashion capable of effective automation. Moreover, virtually any electrode shapes can be realized, in particular optimized with regard to a uniform luminous density with a reduced drop in luminous density towards the edges of the flat lamp. At least the anodes (5, 6) are covered in each case with a dielectric layer (15). The lamp (1) is preferably operated by means of a pulsed voltage source and serves as background lighting for LCDs, for example in monitors or driver information displays.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: February 8, 2005
    Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventors: Frank Vollkommer, Lothar Hitzschke
  • Patent number: 6847157
    Abstract: A dielectric barrier discharge lamp having a cap (2), an elongate discharge vessel (1) and strip-like outer electrodes (5a-5f) has a corresponding contact spring (7a-7f) for each outer electrode. These contact springs are arranged in the interior of the cap. The cap also includes a cap sleeve (6), which surrounds one end of the discharge vessel (1) in such a manner that the or each strip-like outer electrode (5a-5f) is in electrically conductive contact with the or a corresponding contact spring (7a-7f). Preferably, the transverse extent of the individual contact springs, at least in the region of the contact, is less than or equal to the width of the corresponding strip-like outer electrode. This design combines ease of installation of the cap with a reliable contact and a high lamp efficiency.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: January 25, 2005
    Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventors: Rainer Kling, Reinhold Wittkoetter
  • 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
  • Patent number: 6837767
    Abstract: A novel method for producing discharge lamps, in which discharge vessels 5 are filled in a chamber 4 with the required gas filling at normal pressure.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: January 4, 2005
    Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventors: Lothar Hitzschke, Frank Vollkommer
  • Patent number: 6827591
    Abstract: An electrical device such as a ballast for fluorescent lamps and including a housing, a terminal, and a catch element for connecting the terminal to the housing, the catch element including a catch leg for connecting the terminal to the catch element and for connecting the catch element to the housing. Accordingly, the electrical device is designed such that the individual terminal sites of the terminal have minimal positional tolerance so that the terminal can be wired with an automatic installation machine without the danger of misinsertions.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: December 7, 2004
    Assignees: Phoenix Contact GmbH & Co., Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
    Inventors: Jürgen Feye-Hohmann, Wolfgang Ebert, Gunther Löhmann, Axel Becker
  • Patent number: 6819048
    Abstract: The discharge volume has an internal length L and a maximum diameter D at its center, with the discharge vessel being equipped with a light-emitting filling and with two electrodes at the ends of the discharge vessel, with the lamp being operated by means of high frequency such that an acoustic longitudinal mode is formed, with the wall thickness varying along the length L of the discharge volume, with the wall thickness S being thinnest at the center of the discharge vessel, while it is at least 1.2 S at an optimum point Popt, with the optimum point in each case being at a distance of {fraction (7/24)} L from the end of the discharge vessel.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: November 16, 2004
    Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
    Inventor: Klaus Stockwald
  • Patent number: 6799865
    Abstract: The planar light source (1) uses the principle of RGB mixing, the radiation of UV diodes (5) arranged in a planar fashion being converted by means of phosphors (7) which emit in the red and green spectral regions. The blue component is added by blue-emitting LEDs (8) whose radiation is preferably launched as a lateral diode row (9).
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: October 5, 2004
    Assignee: Patent-Treuhand-Gesellschaft für Elektrische Glühlampen mbH
    Inventors: Andries Ellens, Karl-Peter Schliep, Franz Zwaschka
  • Patent number: 6794810
    Abstract: The phosphor composition for low-pressure gas discharge lamps with a high light efficiency for generating radiation with a color temperature of greater than 5000 K and a very good general color rendering index Ra of greater than 90 includes at least one halophosphate phosphor, a phosphor which emits in the red wavelength region and a phosphor which emits in the blue-green wavelength region. In addition, according to the invention the phosphor composition contains an Eu-doped barium magnesium aluminate phosphor BaMgAl10O17:Eu and a Tb-doped green-emitting phosphor.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: September 21, 2004
    Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventors: Wolfgang Gruber, Matthias Schiplage, Martin Zachau
  • Patent number: 6788001
    Abstract: In a lighting system which includes an electronic operating device and a gas discharge lamp with filaments, one filament terminal is respectively connected to an impedance network. The impedance network has an impedance function with a zero point at the frequency f1. For preheating purposes, the electronic operating device outputs a voltage whose frequency is close to the frequency f1. As a result, the voltage across the lamp is below the non-starting voltage during preheating.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: September 7, 2004
    Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbH
    Inventor: Alfons Lechner
  • Patent number: 6778373
    Abstract: A rectifier circuit matched for power factor correction. A first diode (D1), a second diode (D2), a third diode (D3) and a fourth diode (D4) are in a bridge arrangement. A first pole (10) and a second pole (12) of the bridge arrangement are connected to a source (U) which has at least one AC voltage component. An inductance (L1) is arranged in series with the third pole (14) or the fourth pole (16) of the bridge arrangement. A capacitance (C1) is connected between the first pole (10) and the second pole (12), and two of the four diodes (D1, D2, D3, D4) are in the form of fast diodes.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: August 17, 2004
    Assignee: Patent-Treuhand-Gesellschaft für Elektrische Glühlampen mbH
    Inventors: Ugo Francescutti, Felix Franck