Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Patent-treuhand-gesellschaft Fuer Elektrische Gluehlampen Mbh

Osram Sylvania Inc.

Osram Ag

Osram Gesellschaft MIT Beschraenkter Haftung

Patent-treuhand-gesellschaft Fur Elektrisch Gluhlampen Mbh

Other

Osram Gmbh

Osram Gesellschaft MIT Bechrankter Haftung, a Limited Liability Company

Osram Gesellschaft MIT Beschrankter Haftung

Reinhard Lecheler

Arwed Storm

Siegfried Mayer

Bernd Rudolph

Markus Heckmann

Olaf Busse

Harald Schmitt

Oskar Schallmoser

Bernhard Schemmel

Thomas Pollischansky

Horst Werni

Thomas Siegmund

Alfons Lechner

Kay Schmidtmann

Michael Seibold

Theodor Kiermeier

Bernhard Siessegger

Harald Dellian

Wolfram Sowa

Franz Raiser

Udo Custodis

Maximilian Gerber

Richard Dilger

Georg Bschorer

Hans-Gerhard Bürzele

Andreas Lochschmidt

Hermann Schweizer

Various embodiments may relate to a lighting system including a Power Supply Unit and at least one Light Engine Module, with an interface between the Light Engine Modules and the Power Supply Unit. The Light Engine Modules send pulses representing their current demand to the Power Supply Unit adjusting the output current accordingly. The Light Engine Modules are connected in parallel, and the pulse sequences are sent at the same time. Measures are taken to cope with interfered pulses.

Current demand control of lighting modules

PWM-based dimming techniques are provided for lighting systems. The techniques can be used to eliminate or otherwise reduce the potential for strobing and flickering, and may be implemented, for example, in a driver suitable for powering LED lighting systems, but can be used with other suitable light sources as well. In an example embodiment, the potential for line frequency induced flicker, or even line disturbances that are periodic with the line frequency, can be eliminated or reduced by synchronizing the PWM frequency to the line frequency or so-called mains frequency, and the potential for strobing can be eliminated or reduced by either using a randomized phase angle on a cycle-to-cycle basis or by using multiple PWM LED drive circuits all having constant cycle-to-cycle phase angle but a different phase angle from drive circuit to drive circuit (or different from LED string to LED string, as the case may be).

Synchronized PWM-dimming with random phase

An electronic control gear for operating at least one of at least one LED and at least one discharge lamp is provided. It may include a first terminal for coupling to a phase of an AC voltage supply; a second terminal for coupling to the neutral conductor of the AC voltage supply; a control input for coupling in a control signal of a control apparatus; a first output for coupling to the LED; a second output for coupling to the discharge lamp; a first driver circuit for the LED; a second driver circuit for the discharge lamp; an evaluation apparatus for evaluating the control signal at the control input, the evaluation apparatus comprising a microcontroller, which activates said driver circuits depending on the control signal, wherein a first capacitance is coupled between the second terminal and the control input.

Electronic control gear for operating at least one LED and/or 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

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 invention relates to a dielectric barrier discharge lamp having outer electrodes which have ends in the form of plug connection elements.

Dielectric barrier discharge lamp having pluggable electrodes

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 having a series circuit of class E converter modules for optimizing the DC supply voltage of the individual converter module (for example C, C, Z, S, L, L).

Converter circuit having class E converter modules

A ballast and its operating method for a dielectrically impeded discharge lamp. The ballast contains a transformer having a third winding which can be short-circuited via a switch. By so doing, the injection of the voltage pulse into the lamp circuit may be controlled by an external trigger signal.

Electronic ballast for a lamp to be operated using iterative voltage pulses

The invention relates to an electronic ballast for a dielectrically impeded discharge lamp (L), which ballast has an inductor (W, W, W) with a winding (W) that can be short-circuited.

Electronic ballast for a lamp to be operated with iterative voltage pulses

The invention relates to a circuit for operation of a lamp with a componentto be cooled and with a heat sinkwhich includes an angle of 10&#xb0;&#x2013;70&#xb0; with a circuit board

Operating circuit for a lamp with a heat sink

The invention relates to a circuit arrangement for operating electric lamps (), in particular dielectric barrier discharge lamps, having an input stage () in the form of a voltage-increasing converter, in particular a step-up converter, and at least one subsequent further circuit stage (), for example a flyback converter in the form of a pulse stage. An intermediate circuit overcurrent protection device () is connected between the step-up converter () and the flyback converter () and protects the flyback converter () in the event of a fault, specifically in particular if the input overcurrent protection device () does not respond.

Circuit arrangement for operating electric lamps

The invention relates to an improved color display with temporary sequential primary color mixing, in the case of which a discharge lamp for dielectrically impeded discharges is used for backlighting.

Color display having sequential primary color generation

A fluorescent lamp, in particular for the backlighting of liquid crystal display screens, having a discharge vessel with a gas filling, the discharge vessel having a fluorescent layer and an electrode structure for a dielectric impeded discharge, the electrode structure fixing a geometric distribution of partial discharges and the fluorescent layer having a thickness variation in accordance to the geometrical distribution of the partial discharges.

Growing community of inventors

Neuburg/Donau, Germany

Reinhard Lecheler