Patent-treuhand-gesellschaft Fuer Elektrische Gluehlampen Mbh

Patent-treuhand-gesellschaft F. Elektrische Gluehlampen Mbh

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Siemens Aktiengesellschaft

Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Osram Ag

Osram Gesellschaft MIT Beschraenkter Haftung

Guenther Hirschmann

Christian Wittig

Peter Helbig

Arnulf Rupp

Andreas Huber

Gerhard Behr

Franz Schellhorn

Alois Biebl

Bernhard Siessegger

Juergen Becker

Thomas Reiners

Bernd Lewandowski

Franz Bernitz

Guenter Waitl

Michael Boenigk

Bernhard Ertl

Anton Duschl

Johann Winkler

Gerwin Thiel

Knut Asmussen

Manfred Roehl

Erwin Gaisbauer

Karl Gerhard

Hartmut Froescher

Markus Siegner

Franz Sagberger

Guenter Schinkinger

Bontcho Gotchev

Lars Kolbe

Matthias Mengele

Stefan Mueller

Stefan Dietz

An electronic ballast for a discharge lamp includes a microcontroller, which is configured to identify the parameters which determine the discharge lamp type. The microcontroller implements an orientation mode program once when the lamp is first switched on, which orientation mode program can be used to determine the type of discharge lamp.

Universal electronic ballast for operating Hg-free lamps and Hg-containing discharge lamps

Various embodiments relate to an integrated gas discharge lamp including a lamp base, a gas discharge lamp burner and an ignition electronics, wherein the integrated gas discharge lamp includes an operation electronics for operating the gas discharge lamp burner, and the gas discharge lamp burner, the ignition electronics, and the operation electronics are unseparably coupled with each other.

Integrated gas discharge lamp

A gas discharge lamp base ( ) with a starting device has a carrier part ( ) for electronic components ( through ) of the starting device. The carrier part ( ) has a top side and a bottom side. Only high voltage-carrying components ( through ) of the starting device are arranged on the one side of the carrier part ( ), and only low voltage-carrying components ( through ) of the starting device are arranged on the other side (low voltage side) of the carrier part ( ).

Base of an electric discharge lamp with an ignition device

The invention relates to a lighting system with a high-pressure discharge lamp and a control unit (W, FS, C , W) for the high-pressure discharge lamp ( ), where the lamp base ( ) has at least two housing parts ( ) which are connected to one another by a releasable closure ( ). The first housing part ( ) has fastening means ( ) for the at least one lamp vessel ( ). The high-voltage part (TR) of the ignition device (TR, FS, C ) is accommodated in the first housing part ( ), whilst the second housing part ( ) is provided with the electrical connections ( ) for the high-pressure discharge lamp ( ) and preferably contains the remaining components (FS, C ) of the ignition device and the voltage converter (W) of the control unit.

Lighting system with a high-pressure discharge lamp

An apparatus for operating a discharge lamp from an on-board voltage source of a motor vehicle. The discharge lamp is operated at a first electrical power to produce a taillight and is operated with a second, higher power to produce a signal light.

Apparatus and circuit for operating a discharge lamp of a motor vehicle at two power levels

The drive circuit is suitable for an LED array, comprising a number of clusters of LEDs, with one cluster comprising a number of LEDs which are arranged in series and are connected to a supply voltage (U ). A semiconductor switch (transistor T) is arranged in series between the LED and the supply voltage and allows the LED current to be supplied in a pulsed manner. A measurement resistor (R ) for measuring the LED current is arranged in series between the LED and ground, with a control loop controlling the semiconductor switch such that a constant mean value of the LED current is achieved.

Control circuit for LED and corresponding operating method

An optoelectronic component group has at least two LEDs ( ) which are mounted on a support ( ). The support is composed of a material having a thermal conductivity of better than 1.5 W/K&times;m, for example ceramic or composite material.

Led component group with heat dissipating support

A circuit arrangement for operating at least one high-pressure discharge lamp with a high-frequency alternating voltage, the circuit arrangement having a voltage converter (W) with an alternating voltage output (j,j,), a load circuit which is connected to the alternating voltage output (j,j,) and which has at least one lamp inductor (L,), a coupling capacitor (C,) and terminals (j,j,) for at least one high-pressure discharge lamp (LP), and a starter (Z) with a high-voltage source and a high-voltage DC output (j,j,) for starting a gas discharge in the at least one high-pressure discharge lamp (LP). The coupling capacitor (C,) is connected to the high-voltage DC output (j,j,) via a charging resistor (R,).

Circuit arrangement and method for operating at least one high-pressure discharge lamp

The invention relates to a high-pressure discharge lamp having a base at one end and whose return conductor (,) is protected with the aid of a bidirectional trigger (D) against high induced voltages of the radio interference suppression reactor (L,) connected to the return conductor (,).

High-pressure discharge lamp having a base at one end and a starting device integrated in the base

The invention relates to a pulse starting device and a starting method for a discharge lamp, in particular a high-pressure discharge lamp for a motor vehicle headlamp. The starting device has a transformer which has either two primary windings which are connected in parallel and are both coupled inductively to the at least one secondary winding, or instead has a primary winding which consists of a wide metal strip and is wound, separated by an electric insulation, over the at least one secondary winding. The starting device according to the invention has a compact design which permits the complete starting device to be accommodated in the lamp cap.

Ignition device for a discharge lamp and method for igniting a discharge lamp

The invention relates to an ignition apparatus for a discharge lamp, in picular high-pressure discharge lamp for motor vehicle headlights. The ignition apparatus, which is preferably designed as a pulse ignition device, is accommodated in the lamp base. According to the invention, it has; a plate (1), which is composed of an electrically conductive material, is matched to the geometry of the base and on which at least the ignition capacitor (C1) and the spark gap (F1) are fastened, at least one first electrical connection of the ignition capacitor (C1) and at least one first electrical connection of the spark gap (F1) being electrically conductively connected to the plate (1).

Ignition apparatus for a discharge lamp

High-pressure discharge lamp having decoupled ignition and load circuits

To provide for effective control of a discharge lamp, typically, a sodium gh pressure discharge lamp, which operates in two phases, namely, a power pulse phase, followed by a holding phase, without extensive and complex electronic circuitry, two individual oscillator systems are provided, one for each phase; the oscillator systems include a first power burst oscillator formed as a first half bridge by two transistors (T1, T2), and an individual connecting current limiting inductance (L1) to the lamp (E), and a second oscillator including a two-transistor second half bridge (T3, T4) and an individual current limiting inductance (L2) coupled to the lamp. The respective oscillators are controlled, in a closed control loop, by a burst generator (BG) and a holding pulse generator (SG), each of which provide their signals to a logic circuit (LK) which provides for exclusive control of the respective first or second half bridge. A lamp voltage sensing circuit (C4, R2) taps lamp operating voltage, which is compared with a command signal to control through a repetition frequency control generator (WG), the recurrence rate of the bursts from the power bursts generator (BG). The lamp starting circuit (4) can also be controlled from the sensed signal by comparison with a reference in a second comparator (K) and suitably applied to an ignition circuit by an ignition monitoring logic. A pair of electrolytic capacitors of essentially the same value is connected across the d-c supply and their midjunction to the lamp.

Discharge lamp typically a sodium high-pressure discharge lamp, from an

To provide for automatic switch-over between a power phase and a holding se in operation of a discharge lamp (EL), a choke or ballast coil (L), serially connected to the discharge lamp, is constructed to have, with respect to current flow therethrough, a non-linear reactance value; the choke or ballast coil is wound on a core which, for example, can be a E-core in which the center leg is of reduced cross-section with respect to the outer legs; or, if one is a torroidal coil on a ring core, the ring core is preferably made of two core elements of different magnetic characteristics, connected together, for example by an adhesive, in which one core element is of low permeability material, such as iron powder or permaloy with high saturation magnetization, and a second core is formed of ferrite with low saturation magnetization. Current flow through the coil and the serially connected lamp is controlled by alternately operating switch elements (S1, S2), typically insulated gate bipolar transistors, to supply power bursts of, for example, between 20 and 30 A during a second operating phase, separated by a first operating phase of between 0.3 A and 0.5 A at a substantially higher frequency than the frequency of the power bursts, and lasting 10 to 30 times as long as the power bursts. An ignition circuit (Z, L-CR) is provided to start or fire the lamp.

Circuit for pulsed operation of a discharge lamp

An optical connection between an optoelectronic structural element and a fiber-optic beam waveguide is described which is reliable, simple, and space-saving. A lens and a hollow cylinder are integrated in the structural component of optoelectronic structural elements. Each end of a fiber-optic beam waveguide is inserted into the hollow cylinders, and the optoelectronic structural elements are connected with the aid of a heat-shrinkable tubing with the fiber-optic beam waveguide such that the ends of the light beam waveguide to be coupled abut each of the lens integrated into the optoelectronic structural elements. An optocoupler according to the invention may be advantageously used in motor vehicles, in electromedicine, in power electronics, in robot control, in sensory analysis, and in 'instrumentaion-control-regulation' tasks.

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Munich, Germany

Guenther Hirschmann