Osram Gmbh

Patent-treuhand-gesellschaft Fuer Elektrische Gluehlampen Mbh

Osram Ag

Osram Gesellschaft MIT Beschraenkter Haftung

Osram Gesellschaft MIT Beschrankter Haftung

Patent-treuhand-gesellschaft F. Elektrische Gluehlampen Mbh

Osram Beteiligungsverwaltung Gmbh

Osram Opto Semiconductors Gmbh

Osram Sylvania Inc.

Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Patent-treuhand-gesellschaft Fuer Gluehlampen Mbh

Osram Oled Gmbh

Osram S.p.a. - Societa' Riunite Osram Edison Clerici

Peter Niedermeier

Andreas Huber

Alberto Alfier

Oskar Schallmoser

Walter Limmer

Ralf Hying

Franz Bernitz

Jozsef Szekely

George C Wei

Bernd Rudolph

Bernhard Reiter

Josef Osterried

Martin Honsberg-Riedl

Herbert Kästle

Oliver Woisetschlaeger

Marc Schwenkbeck

Burkhard Ulrich

Dirk Amsbeck

Tobias Kohler

Sven Seifritz

Berthold Gerlach

Hendrik Kornatz

Isabel Rupprecht

Fabio Esposito

In an embodiment an electronic load for installation in a power supply of a vehicle lamp includes a first connection node connected to two first connection sections adapted to be connected between respective corresponding connection sections of a first line carrying a voltage potential, a second connection node connected to two second connection sections adapted to be connected between respective corresponding connection sections of a second line carrying a reference potential, wherein a difference between the voltage potential and the reference potential comprises a supply voltage configured to be supplied to the vehicle lamp and a current sink circuit coupled between the first and second connection nodes, the current sink circuit configured to cause a substantially constant current flow independently of a time-varying supply voltage from at least one of the first connection sections to at least one of the second connection sections.

Electronic load to install in the power supply of a vehicle lamp

A headlamp for the conversion of an original headlamp of a vehicle, comprising: an input for each light function provided by the headlamp, wherein the input is configured to connect to a line of the on-board network of a vehicle for the associated light function, an output for connecting to an on-board network of the vehicle, a module for simulating a load current for those light functions that require considerably less power in the headlamp than the corresponding light source in the original headlamp, at least one light source with an associated electronic operating device for each light function of the headlamp, and a controller for controlling-the modules for simulating a load current and for controlling the light sources with the associated electronic operating device. The module for simulating a load current for each light source comprises a series circuit arrangement of a resistor and a switch.

Headlamp having a circuit assembly for simulating a load current from a vehicle electrical system

A circuit assembly for simulating a load current from an on-board network having an input connected to a line of the on-board network of a vehicle for connecting to a load, an output connected to a light source which replaces the load. A series circuit formed by a resistor and a switch, wherein the resistor has a resistance in the same order as that of the load to be simulated, and the series circuit is connected in parallel with the input. A switching controller with the input connected in parallel to the input of the circuit assembly, and draws a current from the line of the on-board network for connecting to a load smaller than the load current of the load to be replaced. The circuit assembly is open the switch and actuate the switching controller and to close the switch and deactivate the switching controller.

Circuit assembly and method for simulating a load current from an on-board electrical system

In various embodiments, a lamp is provided. The lamp may include two mutually opposite end sections, which each form an electrical contact of the lamp. In each case at least one semiconductor light source is arranged in the region of the end sections. The lamp has an operating apparatus for the semiconductor light sources. The operating apparatus has electrical components, which are arranged in the region of a first section of the lamp, and the operating apparatus has at least one further electrical component, which is arranged in the region of the second end section of the lamp.

Lamp

In various embodiments, a lamp is provided. The lamp may include a mounting board; at least one semiconductor light source arrangement arranged on the mounting board and comprising a base, which is provided with base contacts for supplying energy to the at least one semiconductor light source arrangement and which is compatible with a standardized incandescent lamp base; and at least one insulation displacement contact to make electrical contact with the at least one semiconductor light source arrangement.

An LED module for backlighting a screen comprising at least one LED, (LR, LG, LG, LB), a sensor device for detecting at least one physical quantity, and a drive device for driving the at least one LED (LR, LG, LG, LB) depending on a signal from the sensor device.

LED module with dedicated color regulation and corresponding method

A control method for a semiconductor light source may include operating the semiconductor light source with short, powerful pulses by an operating device; storing the characteristic light decrease of the semiconductor light source depending on the power introduced into the semiconductor light source in the operating device; and altering power introduced during the pulse in such a way that the emitted quantity of light of the semiconductor light source substantially remains constant over the pulse duration.

Feedforward control of semiconductor light sources

A self-oscillating DC/DC converter comprising: a first and a second input connection for application of an input DC voltage; a first and a second bipolar transistor, wherein each bipolar transistor has a control electrode, a reference electrode and a working electrode; at least one first coupling capacitor; wherein a first switching junction is formed by the junction of the working electrode and the reference electrode of the first bipolar transistor, and a second switching junction is formed by the junction of the working electrode and the reference electrode of the second bipolar transistor, wherein the first and the second switching junctions are connected in series with respect to the input DC voltage; a rectifier, with an output that is coupled to a first and a second output connection in order to provide an output DC voltage; a transformer, which has a primary winding, a secondary winding and at least one control winding; wherein the primary winding is coupled between a galvanic connection of the first and the second switching junction and the at least one coupling capacitor; wherein the secondary winding is coupled to the input of the rectifier; wherein each bipolar transistor has an associated control winding which is coupled to the control electrode of the respective bipolar transistor and at least one timer, which is coupled between the respectively associated control winding and the respective control electrode.

Self-oscillating bipolar transistor DC/AC/DC converter using a pulse forming timer

A circuit arrangement for operating a high-pressure discharge lamp with an electronic ballast, which is designed to provide an AC feed signal for the high-pressure discharge lamp, the frequency of the AC feed signal being at least 1 MHz, wherein the electronic ballast is adapted to modulate the amplitude of the AC feed signal.

Circuit arrangement, and method for the operation of a high-pressure discharge lamp

An LED module () comprising a thermally conductive circuit board (); at least one LED chip (to) mounted on the thermally conductive circuit board (); at least one temperature sensor () mounted on the thermally conductive circuit board (), for determining the temperature of the at least one LED chip (to); an optical arrangement (), which is arranged above the at least one LED chip (to) and is mounted on the thermally conductive circuit board (), wherein the optical arrangement () has at least one light-guiding section (); and a light sensor () arranged on the thermally conductive circuit board (), said light sensor being arranged with respect to the at least one light-guiding section () in such a way that it can sense light guided in the light-guiding section ().

LED module

An illumination device may include a flexible printed circuit board; a power electronics module; and a light-emitting diode module, which is electrically connected to the power electronics module by means of the flexible printed circuit board.

Illumination device and projection device with such an illumination device

A light source () is disclosed, emitting multi-colored light with light of at least two different colors, emitted from a number of primary light sources () wherein the primary light sources () are divided into groups and the brightness values of the primary light sources () within a group are determined and controlled separately according to color, such that the color location of the multi-colored light lies in a given region of the CIE standard color diagram. The invention further relates to a method for controlling such a light source () and an illumination device with such a light source (), for example, for backlighting a display.

Light source emitting mixed-colored light and method for controlling the color locus of such a light source

A discharge lamp having a visual-change timer is described. The visual-change timer is comprised of a ceramic material that provides an indication of the cumulative operating time of the lamp. The visual-change timer is expected be a help to consumers in avoiding unnecessary, premature, and costly lamp replacement and a help to lamp manufacturers in verifying the validity of warranty claims for replacement lamps.

Discharge lamp having a visual-change timer

A cost-effective driver circuit for an LED background lighting unit includes a buck circuit with an upper transistor is driven via two further transistors. The first transistor is connected with its reference electrode to the positive terminal of a DC voltage source, with its working electrode to the control electrode of the buck transistor and with its control electrode, via a capacitor, to a signal contact, which can be driven externally. The second transistor is connected with its reference electrode to ground, with its working electrode to the control electrode of the buck transistor and with its control electrode to a signal contact, which can be driven externally. The buck transistor can be switched on via a corresponding gate signal at the terminal for the purpose of operating the light-emitting diodes. Advantageously, cost-effective standard transistors for operating voltages below 100 V can be used for the switching controller.

Circuit apparatus with a high-side buck transistor

A structural configuration of a failsafe OLED chain with multiple OLED lighting components in series connection is described. During the manufacture of the lighting component a weak spot is specifically installed at an appropriate location of the structure in the form of a break-through layer, which in the event of a failure of the lighting component breaks down and bypasses the component with a bypass layer.

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Munich, Germany

Peter Niedermeier