Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Osram Gesellschaft MIT Beschraenkter Haftung

Patent-treuhand-gesellschaft F&uuml;r Elektrische Gl&uuml;hlampen Mbh

Osram Gmbh

Osram Ag

Patent-treuhand-gesellschaft Fur Elektrisch Gluhlampen Mbh

Patent-treuhand-gesellschaft Fuer Elektrische Gluehlampen Mbh

Osram Gesellschaft MIT Beschrankter Haftung

Olaf Busse

Siegfried Mayer

Markus Heckmann

Arwed Storm

Bernhard Schemmel

Horst Werni

Alfons Lechner

Bernd Rudolph

Harald Schmitt

Reinhard Lecheler

Thomas Pollischansky

Oskar Schallmoser

Bernhard Reiter

Thomas Siegmund

Kay Schmidtmann

Christof Schwarzfischer

Martin Grabner

Richard Koeppl

Rene Twardzik

Michael Weirich

Wolfram Sowa

Maximilian Gerber

Klaus Orth

Jerzy Cierpinski

Bernhard Orben

Thomas Eckhard

Cristian Bahr

A clocked electronic energy converter having an electronic switching element, at least two electrical energy storage devices, a terminal for connecting an electrical energy source, a terminal for connecting an electrical energy sink, a clock generator for controlling and operating the electronic switching element during switching operation and an adjusting unit which provides a first signal for adjusting the power-to-be-transmitted by the energy converter, is disclosed. The clock generator is designed to adjust the power-to-be-transmitted by the energy converter in a first output range by means of the switch-on time of the electronic switching element and, in a second output range in which the power-to-be-transmitted by the energy converter is less than in the first output range, to adjust the power-to-be-transmitted by the energy converter in the second output range by a combination of the switch-on time and the supplemental switch-off time, the supplemental switch-off time being constant.

Clocked electronic energy converter

According to the present disclosure, a circuit arrangement for operating semiconductor light sources includes: a power input for inputting an AC input voltage, an output having a first output terminal, and a second output terminal, which is designed to connect a string of semiconductor light sources, a control input for controlling the operation of the circuit arrangement with a control signal, a rectifier circuit for converting the AC input voltage into a rectified voltage, a converter circuit for transforming the rectified voltage into a current which is suitable for the semiconductor light sources, a first switch arranged between the converter circuit and the output, for the switching of the current through the semiconductor light sources, and a first diode arranged between the first switch and the output, or between the converter circuit and the first switch.

Circuit arrangement for operating semiconductor light sources

A clocked electronic energy converter may include an electronic switching element, at least two electrical energy storage devices, connections for connecting an electrical energy source and for connecting an electrical energy sink, a clock generator for controlling the electronic switching element and a switch-on time unit for generating a first signal for the clock generator, which switch-on time unit sets the power of the energy converter to be transmitted in a first power range by the first signal. The switch-on time unit generates a first signal representing a switch-on time for the clock generator in a second power range in which the power lower can be set than in the first power range, and the clocked electronic energy converter has a switch-off time unit generating in the second power range a second signal for the clock generator, which signal represents a switch-off time depending upon the power to be transmitted.

Various embodiments provide an electronic ballast for operation of at least one discharge lamp, with the electronic ballast having an apparatus for power factor correction with a voltage converter. The voltage converter itself includes an inductance, a diode and a switch. A control apparatus, which produces a square-wave signal as a control signal to the switch of the apparatus for power factor correction, includes an I regulator. This produces a first component of the on time of the control signal. In order to react to short-term power demands in the load circuit for example on ignition of the discharge lamp, an electronic ballast furthermore may include a power determining apparatus, which is coupled to the control apparatus, with the control apparatus being designed to vary the control signal as a function of the power consumed in the discharge lamp.

Electronic ballast and method for operation of at least one discharge lamp

An electronic ballast for an electrical lamp () provided with a first () and a second filament (), includes a heating device which is used to heat the filaments () and includes a resonance circuit (), and an evaluation unit () designed for the evaluation of at least one measuring value of an electrical parameter during pre-determinable adjustments of operating conditions of the resonance circuit (). The number of filaments () of the electrical lamp () in electrical contact with the electronic ballast () can be identified according to the measuring value, and the electrical lamp () can be switched on by the electronic ballast () according to the identified number. A method for operating an electrical lamp by an electronic ballast is also described.

Electronic ballast and method for operating an electrical lamp

An electronic ballast for operating at least two discharge lamps is provided, which may include a starting detection apparatus for detecting whether one of the discharge lamps has been started; wherein a drive circuit includes an input, which is coupled to a starting detection apparatus, wherein a threshold value entry apparatus is designed to enter a second threshold value for a setpoint value of a total current through at least two inductances, wherein the second threshold value has a smaller magnitude than a first threshold value; and wherein the drive circuit is designed to drive a first electronic switch and a second electronic switch taking into consideration the first threshold value as setpoint value prior to detection of the starting of a discharge lamp by the starting detection apparatus, and taking into consideration the second threshold value as setpoint value.

Electronic ballast and method for operating at least one first and second discharge lamp

A method for detecting a statistical characteristic of a lighting device is provided. The method may include a) generate a random number within a prescribable value range; b) compare the random number with a comparison number; c) c1) if the comparison of step b) yields a match: increase the count of a storage device by one step width.

Method and device for detecting a statistical characteristic of a lighting device

An electronic ballast for operating at least one discharge lamp may include an input for coupling to an input voltage; a load circuit with an output, the load circuit having a bridge circuit; an intermediate circuit capacitor that is coupled to the input of the load circuit; a transformer that is coupled between the input of the ballast and the capacitor, the transformer having a transformer switch; a control apparatus for driving the switch; and a monitoring apparatus for monitoring at least one value correlated with the input voltage, the control apparatus being designed to deactivate the driving of the switch upon detection of a deactivation criterion; and a voltage measuring apparatus for measuring the intermediate circuit voltage, the control apparatus being designed to reactivate the driving of the switch after a deactivation phase when the sum of input and intermediate circuit voltage has dropped below a prescribable threshold value.

Electronic ballast and method for operating at least one discharge lamp

The present invention relates to an electronic ballast for discharge lamps (LA) which have preheatable electrodes (E, E). The electronic ballast has a measuring apparatus (M), which is designed to measure, during the preheating process, a variable, which is correlated with the electrode temperature increased by the preheating, of at least one of the electrodes (E, E) of a connected discharge lamp (LA), and a control apparatus (C), which is designed to match the electrode temperature, during the preheating process, in response to the measurement by adjusting an operational parameter of the electronic ballast. Furthermore, the electronic ballast is designed to detect cross discharges or a sufficient operating temperature of one of the electrodes (E, E) and possibly to ignite the discharge.

Ballast for a discharge lamp with adaptive preheating

A circuit arrangement for striking a discharge lamp, comprising: a drive apparatus, having an output adapted to provide a drive signal with a predeterminable frequency; an inverter, which is coupled to the output of the drive apparatus, and having an output adapted to provide a square-wave signal with a predeterminable duty factor; a load circuit, which is coupled to the output of the inverter and has at least one terminal for the discharge lamp, the load circuit comprising a lamp inductor, which is coupled in series between the output of the inverter and the at least one terminal for the discharge lamp; a first control loop with a first reference variable, a first manipulated variable and a first controlled variable, the first control loop having a first time constant; a second control loop with a second reference variable, an auxiliary manipulated variable and a second controlled variable, the second control loop having a second time constant; and a strike detection apparatus, which is adapted to detect striking of the discharge lamp and, after detection of the striking to switch over the first and the second control loops from the striking operation mode to the continuous operation mode. The auxiliary manipulated variable of the second control loop represents the first reference variable of the first control loop, the first time constant being smaller than the second time constant by at least a factor of 10, and the first manipulated variable represents the duty factor of the output signal of the inverter.

Circuit arrangement and method for striking a discharge lamp

The present invention relates to a circuit arrangement for operating at least one electric lamp and at least one LED including: an inverter having a bridge circuit having at least one first bridge transistor and one second bridge transistor arranged in series with one another, a center point of the bridge circuit being defined between the first and second bridge transistors; a lamp supply unit for supplying the electric lamp with energy from the bridge circuit, which includes a supply line with an inductance, via which the center point (M) of the bridge circuit is coupled to a first connection for the electric lamp; the lamp supply unit including an LED supply unit, which is designed to supply the at least one LED with energy. Moreover, it relates to an operating method for at least one electric lamp and at least one LED using such a circuit arrangement.

Circuit arrangement and method for operating at least one electric lamp and at least one LED

The present invention relates to a circuit arrangement for operating at least one lamp (LA), which has a first filament (W) and a second filament (W), it comprising an apparatus () for determining a variable which is correlated with the temperature of at least one of the two filaments (W; W). It also relates to a method for operating at least one lamp, which has a first and second filament, a variable correlated with the temperature of at least one of the two filaments being determined prior to restarting the lamp.

Circuit arrangement and method for operating at least one lamp

The present invention relates to a circuit arrangement for operating at least one electric lamp (LP) having a drive circuit (), which has at least one terminal for a system voltage (U) on the input side and at least one terminal for the at least one electric lamp (LP) on the output side; the drive circuit () having a control unit () and a step-up converter having a step-up converter inductor (L) and a switch (S), and the control unit () being designed to operate the step-up converter in a discontinuous mode, in which the current (I) through the step-up converter inductor (L) has gaps, the duration (&#x25ae;t) of these gaps being varied. It also relates to an operating method for at least one electric lamp (LP) using such a circuit arrangement.

Circuit arrangement and method for operating at least one electric lamp

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.

Smoothing circuit for improving EMC

The invention relates to a converter circuit with coupled inductances Land Lwhich have a core K having an air gap S which is asymmetrical with respect to the inductances.

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Munich, Germany

Olaf Busse