Osram Gmbh

Osram Gesellschaft MIT Beschraenkter Haftung

Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh

Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Patent-Treuhand-Gesellschaft Fur Elektrisch Gluhlampen Mbh

Osram Ag

Osram Gesellschaft MIT Beschrankter Haftung

Stmicroelectronics S.r.l.

Insta Elektro Gmbh

Patent-Treuhand-Gesellschaft Für Elektrische Glühlamplen Mbh

Klaus Fischer

Josef Kreittmayr

Helmut Endres

Harald Schmitt

Ludwig Reiser

Roberto Gariboldi

Felix Franck

Giuseppe Cantone

Walter Hirschmann

Andreas Jakob

Marco Antretter

Friedhelm Holtz

Karl-Heinz Krause

Friedhelm Wehlmann

Peter Haeussinger

A circuit arrangement for connecting a plurality of LED modules in parallel comprises a positive pole terminal and a negative pole terminal for connecting a driver, a positive pole terminal line for electrically connecting the positive pole terminal to the modules, a negative pole terminal line for electrically connecting the negative pole terminal to the modules, a plurality of positive pole terminal contacts for electrically connecting the positive pole terminal line to anode terminal contacts of the modules, and a plurality of negative pole terminal contacts for electrically connecting the negative pole terminal line to cathode terminal contacts of the modules.

Module and circuit arrangement for a light source

A circuit arrangement for an LED luminaire comprises a plurality of LED strings, an anode terminal line, a cathode terminal line, a plurality of first switching elements, connected in series into the anode terminal line and subdivided into individual line sections, and a plurality of second switching elements, connected in series into the cathode terminal line and subdivided into individual line sections. Each of the LED strings may be connected to the anode terminal line via a first switching element and/or the second switching elements. Each of the first switching elements may be configured to feed an operating current to an LED string, to electrically connect line sections if the current flowing through the LED string exceeds a predetermined value, and to electrically isolate line sections if the current flowing through the LED string falls below a predetermined value.

Circuit arrangement for a light source

The invention relates to a circuit assembly for operating at least one lighting means, comprising at least one master device; at least one slave device; and a bus system having at least one bus, by means of which bus system the at least one master device and the at least one slave device are coupled; wherein the bus is designed as a two-wire cable, wherein the at least one master device has at least one feeding connection, which is coupled to the bus and is designed to place a control signal on the bus, wherein the at least one master device is coupled to a first voltage supply; wherein the at least one slave device comprises a non-feeding connection, which is coupled to the bus, wherein the slave device comprises a connection for at least one lighting means, a second voltage supply, and a read-out device for reading out the control signal on the bus, wherein the read-out device comprises a potential-isolating device and wherein the connection for the at least one lighting means and the second voltage supply are provided on the side of the read-out device isolated from the bus with regard to potential.

Circuit assembly for operating lighting means via a master-slave system

Various embodiments may relate to an electronic ballast for operating at least a first and a second cascade of LEDs, wherein the first cascade of LEDs is designed in such a way that the first cascade of LEDs is not be bridged. In order to provide a target value for a series regulator arranged in series with the LED cascades, a resistance voltage divider is used, which is coupled between the coupling point of the LED cascade that is not bridged and of the LED cascade that is not bridged at one end and the second output connection of the rectifier at the other end.

Electronic ballast for operating at least a first and a second cascade of LEDS

An electronic ballast for operating at least one first cascade of LEDs may include an input for coupling to an AC supply voltage, a rectifier that is coupled to the input, wherein the rectifier has an output having a first and a second output connection, a first unit that includes the first cascade of LEDs, wherein the first unit is coupled to the first output connection of the rectifier, a series circuit including an inphase regulator and a shunt resistor, wherein the series circuit is coupled between the first unit and the second output connection of the rectifier, a setpoint value prescribing apparatus for the inphase regulator having an output that is coupled thereto, wherein the setpoint value prescribing apparatus provides a first setpoint value element at its output, and a second setpoint value element&#x2014;superimposed on the first setpoint value element&#x2014;for the inphase regulator.

Electronic ballast for operating at least one first cascade of LEDs

A method for transmitting control information from a control apparatus to an operating device for a light-emitting means may include a) modulating control information onto a supply line by means of the control apparatus during a modulation phase, wherein a switchable shunt of the device is connected between the first and second supply connections; b) decoding the control information in a decoder of the device; b1) activating the demodulation by the decoder when the absolute value for the voltage at the two supply connections falls below a first threshold value; and c) actuating a converter of the operating device in accordance with the decoded control information.

Method for transmitting control information from a control apparatus to an operating device for at least one light-emitting means and operating device for at least one light-emitting means

A circuit arrangement with a switchable voltage supply for a control apparatus may include a DC voltage supply terminal; and an AC voltage supply terminal; a control apparatus including at least one input, an output and at least one supply terminal; three electronic switches, each having a control electrode, a reference electrode and a working electrode, wherein the reference electrode of the first electronic switch and of the second electronic switch is coupled to the first node; wherein the working electrode of the first electronic switch is coupled to the supply terminal of the control apparatus; wherein the control electrode of the first electronic switch is coupled to a reference potential, wherein at least one further load is coupled to the working electrode of the second electronic switch.

Switchable current supply for auxiliary current circuits in a current converter

A method is provided for driving at least one lamp unit, which is connected to an AC voltage power supply system. The method comprises modulating a control information item for the operation of the lamp unit onto the supplied AC voltage, decoding of the modulation received on the lamp unit side for reading the control information item and driving the light-emitting device in accordance with the control information item. Provision is made for a shunt to be produced in the line used for transmitting the control information item prior to or at the beginning of the modulation of the control information item. The disclosure also provides a lamp unit and a control device for implementing the method. The disclosure also provides a lighting system.

Method for transmitting control information from a control device to a lamp unit as well as a corresponding illuminating system, lamp unit and control device

The invention relates to an electronic ballast comprising a step-up converter for operating a discharge lamp. The electronic ballast is embodied in such a way as to disconnect a switching element (T) in the step-up converter when a maximum current value of the current flowing through the switching element is reached. The electronic ballast comprises a holding circuit (HS) which is provided with a time-function element (R, C) and is embodied in such a way that it sets the time-function element (R, C) when the switching element (TI) is disconnected and reconnects the switching element after a time interval defined by the time-function element (R, C).

Step-up driver with minimal switching frequency

The invention relates to a circuit arrangement which is used to operate a low pressure discharge lamp (EL), wherein the discharge lamp receives power. Said circuit arrangement is embodied in such a manner that power-determination components (C, L) of the circuit arrangement are embodied in a temperature-dependent manner such that the power consumption of the lamp is limited when the temperature rises. Capacitors (C) and throttles (L) can be embodied in a temperature-dependent manner in a control circuit (AS) of the circuit arrangement.

Circuit arrangement for operating a discharge lamp having temperature compensation

The invention relates to an electronic ballast comprising a converter which is used to operate a discharge lamp, for example, a low pressure discharge lamp, for selectively operating, in a direct manner, the supply network or a phase section dimmer. Jumps in the supply voltage are decoupled by a differential which is connected between at least one of the network lines and the reference potential of the ballast and transmitted to a control of the ballast, such that the control of the converter can distinguish between the operation on the phase section dimmer and on the network supply.

Electronic ballast with phase dimmer detection

A circuit arrangement for operating at least one electric lamp having an inverter has at least one first and one second bridge transistor arranged in series with one another, a first drive circuit for the first bridge transistor; a second drive circuit for the second bridge transistor; the and second drive circuits being designed to drive the first and second bridge transistors to switch alternately completely on and off during normal lamp operation; and at least one protective apparatus; the at least one protective apparatus being designed, in the case of a value for a reference voltage, which is correlated with the voltage across the bridge transistor which has just been switched off, above a predeterminable limit value, to drive the bridge transistor, which has just been completely switched on, such that it is no longer completely switched on. A related method is also described.

Circuit arrangement and method for operating at least one electric lamp

An electronic ballast includes a step-up converter, which includes a storage inductor, a diode, an intermediate circuit condenser and a switch element. According to the invention, a current passing through the storage inductor is used in the form of an indicator of turnon and turnoff times of the step-up converter oscillates in a self-exciting manner.

Self-exciting step-up converter

A circuit including a voltage-controlled transistor to be switched. A first transistor is switched on, mediated by a control signal, and a first current flows through a series circuit and starts to subject a control input of the voltage-controlled transistor to charge reversal. The first current brings about a first potential shift at a connecting node. A second transistor is switched on by this first potential shift and a second current therefore flows through the switching path of the second transistor into the control input of the first transistor, which amplifies the first current. The increasing charge reversal of the control input of the voltage-controlled transistor brings about a second potential shift at the connecting node, the second transistor is switched off by this second potential shift, and the first transistor remains switched on, however, and holds the voltage-controlled transistor in its new switching state.

Circuit for switching a voltage-controlled transistor

An electronic ballast presenting an input capacitor (C) and including a step-up converter (LH, DH, SH, CH) for operating a load, for example a discharge lamp (CFL), on a phase control dimmer (DIM) having an integrated or parasite inductance (L). According to the invention, excessive voltage after connection with a phase control can be reduced by adjusting currents via of the step-up converter (LH, DH, SH, CH).

Growing community of inventors

Friedberg, Germany

Klaus Fischer