Abstract: The present invention relates to a circuit arrangement for operating at least one electric lamp (LP) having a drive circuit (16), which has at least one terminal for a system voltage (UN) on the input side and at least one terminal for the at least one electric lamp (LP) on the output side; the drive circuit (16) having a control unit (18) and a step-up converter having a step-up converter inductor (L2) and a switch (S1), and the control unit (18) being designed to operate the step-up converter in a discontinuous mode, in which the current (IN) through the step-up converter inductor (L2) has gaps, the duration (?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.

Abstract: An energy transducer module (1) which has a turbine (2) for converting the flow energy of a fluid (4) to rotation energy, and has a generator (3) for converting the rotation energy to electrical energy, with the energy transducer module (1) being provided as an energy source for a unit which produces radiation. The energy transducer module (1) can alternatively be used as a flow sensor.

Abstract: An incandescent lamp having a carbide containing luminous element, uses a wire for the luminous element that is coated on the outside with at least two different high melting metal compounds from at least one of the groups of carbides, borides and nitrides. The luminous element reaches a temperature of at least 3000° K during operation.

Abstract: The metal halide lamp has a ceramic discharge vessel and contains two groups of metal halides: a first group made up of the emitters and a second group made up of the wetters. The second group comprises at least one of the metal halides of Mg or Yb.

Abstract: The invention relates to a light bulb comprising an illumination body, which is inserted, together with a filler material, into a bulb in a vacuum-tight manner. The illumination body has a metal carbide, whose melting point lies above that of tungsten. The current supply is configured in two parts from a first section and a second section. The current supply is configured integrally with the illumination body from a single wire and is covered with a coating that reduces the susceptibility to breakage.

Abstract: In the metal halide high-pressure discharge lamp for stage, film and television lighting systems and for projection technology and effect lighting, the discharge vessel contains dysprosium and cesium as fill metals for the metal halides. Optimum results for dimmability, arc instability and color rendering are achieved if the fill additionally includes 0.12 to 3.8 ?mol of vanadium and if appropriate 0.05 to 1.0 ?mol of zirconium per ml of vessel volume. These metals achieve improved color rendering, in particular red rendering, with an Ra of from 70 to 95 and an R9 of from 45 to 90.

Abstract: A dielectric barrier discharge lamp with a discharge vessel (6) having inner electrodes (7) and with a gas-impermeable stopper (10). The stopper (10) has power supply lines (2) making contact with the inner electrodes (7). The gas-impermeable stopper (10) is incorporated in the discharge vessel (6) as a cohesively handleable part, by it being introduced into an opening of the discharge vessel (6). In this case, the opening of the discharge vessel (6) is sealed in a gas-tight manner by the stopper (10) via a change in shape of the discharge vessel (6) and/or of the stopper (10).

Abstract: The invention relates to a method and a device for operation of ah high pressure discharge lamp with a low-frequency current of alternating polarity, whereby the high pressure discharge lamp is operated during a start phase at a higher power than the rated power thereof. According to the invention, the high pressure discharge lamp is provided with a current, at least during the start phase, with a commutation time of less than or equal to 40 microseconds.

Abstract: A driver arrangement for LED light sources includes a transformer having primary and secondary winding connections. A first electronic switch (SW1) controls current flow through the primary winding, and a sensing resistor is coupled to the primary winding to produce a current sensing signal. A second electronic switch (SW2) is sensitive to the sensing signal to switch off SW1 as current flow through the primary winding reaches a given threshold. SW1 is thus alternatively turned-on and off in alternating turn-on and switch-off phases to power the LED light source via the secondary winding. SW1 is a field effect transistor, preferably a MOSFET. The transformer is SELV-rated. The sensing resistor may be a variable resistor to adjust the duration of the on/off phases to permit controlled dimming.

Abstract: 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.

Abstract: A plug connector for supplying power to an electrical load, in particular a lamp, includes a contact spring for electrical connection to a contact blade, a contact blade for electrical connection to a contact spring, and includes a conductor connection for connection of a connection line, wherein the contact spring and the contact blade have a substantially identical insertion direction.

Abstract: A base for a discharge lamp has a stainless steel material which discolors in the visible region above a predetermined temperature, it being possible to perceive such a discoloration preferably above approximately 230° C. with an increasingly strong yellow tarnishing color.

Abstract: A voltage converter, whose topology can be switched over between a boost converter and a SEPIC. The boost converter has ripple current compensation. As a result, the inductors used can be utilized in optimum fashion. A thyristor which is protected against breakdown triggering by a negative gate voltage is used as the changeover switch.

Abstract: A lighting system has a discharge lamp (2), and an associated electronic ballast (1), a printed circuit board (3) on one side bearing outer electrodes for the discharge vessel (5, 6, 7) and on the other side being used for mounting the ballast (1).

Abstract: A LED lighting arrangement includes a support body having mounted thereon one or more LED lighting sources and a driver or feeding the LED lighting sources. The support body includes a high-voltage section carrying the driver and a low-voltage section carrying, mounted on a heat sink, the light sources. An insulation barrier is provided between the high voltage section and the low-voltage section of the board with a twisted pair forming a wiring that traverses the insulation barrier to connect the driver and the LED lighting sources.

Abstract: A circuit arrangement for operating at least one first and one second lamp which can be inserted in the circuit arrangement, each lamp having a first and a second filament, having a drive circuit for the purpose of driving the at least one first and second lamp, the drive circuit being designed to operate the at least one first and second lamp using a radiofrequency signal, it also includes: a comparator circuit for comparing a first and a second voltage potential within the circuit arrangement, and a deactivation apparatus for deactivating the drive circuit, the comparator circuit being designed to activate the deactivation apparatus if the difference between the first and the second voltage potential exceeds a predeterminable limit value during operation of the at least one first and one second lamp using a radiofrequency signal.

Abstract: The invention provides in one embodiment an optoelectronic module 1 having at least a first 2A and a second 2B radiation-emitting source and a first optical element 5 including a cavity 10 wherein the surface 5A of the cavity 10 is able to reflect the radiation 3A, 3B of the at least two radiation sources. An outlet 15 in the optical element 5 is provided for coupling radiation out of the cavity 10, wherein the radiation emitted by the radiation sources 2A, 2B is reflected by the surface 5A of the cavity resulting in a mixing of the radiation.

Abstract: A lamp that has a base with a base insulator. Power supply lines are connected in the base to extension wires by means of coils.

Abstract: An adapter for providing a recessed lamp in a screw-type lampholder. This adapter has an electrical contact-making device, via which an electrical connection is produced between a screw base, which can be introduced into the screw-type lampholder, of the adapter and the recessed lamp once the recessed lamp has been introduced into the adapter. Furthermore, the adapter has a switchable electrical connecting device, via which, in the state in which there is no mechanical connection between an enveloping bulb for the recessed lamp and the adapter, an electrical connection is not produced between the screw base and the recessed lamp, and via which, in the state in which the recessed lamp is surrounded, at least in sections, by the enveloping bulb, an electrical connection is produced between the screw base and the recessed lamp. As a result, the recessed lamp in the adapter can only be operated with the enveloping bulb placed thereon.

Abstract: An apparatus for the closed-loop and open-loop control of filament heating for a lamp, in particular for a fluorescent lamp, has a control loop into which a first filament (W1), an operational-parameter detection element (E), a heating controller (H) and a first actuating element (S1) are connected. The heating poser of the first filament (W1) is detected by means of the operational-parameter detection element (E) and, on the basis of this, a manipulated variable (SG) is determined, by means of which this first filament (W1) is subjected to closed-loop control. Furthermore, at least one second filament (W2 to Wn), which is not connected in the control loop, is controlled on the basis of the determined manipulated variable (SG).