Abstract: A method for driving an LED connected to a power switch is provided. The method may include: determining a duty cycle of a pulse sequence for controlling the power switch according to a present current and a predetermined operating current of the LED; generating the pulse sequence according to the duty cycle and according to at least one of a randomized period sequence and a randomized pulse position sequence; and controlling switching operation of the power switch by the pulse sequence, so as to drive the LED.

Abstract: In a method for operating at least one light emitting diode the at least one light emitting diode is operated at least in some ranges by means of a pulse number modulation, in which a number of uniform current pulses is set within a predetermined interval duration depending on a light energy desired value.

Abstract: A high-pressure discharge lamp comprising a translucent discharge vessel which encloses a discharge space and has two sealed ends. Two electrodes extend from the sealed ends into the discharge space, and a fill is arranged in the discharge space for generating a gas discharge. Electrical feeds lead out of the sealed ends for supplying energy to the electrodes, with an electrically conductive layer acting as an ignition aid being arranged on the surface of the discharge vessel. The electrically conductive layer comprises at least a first layer section and a second layer section, the first layer section being arranged on a first sealed end of the discharge vessel and extends onto the surface of that region of the discharge vessel which encloses the discharge space. The second layer section is arranged on the second sealed end of the discharge vessel and extends onto the surface of that region of the discharge vessel which encloses the discharge space.

Abstract: Disclosed is an illuminating system of flexible shape and comprising at least one LED disposed on a flexible carrier material, an optic being provided that permits uniform, directed and/or glare-free light emission.

Abstract: A method for igniting and for starting high-pressure discharge lamps is provided. The method may include applying a takeover voltage to the lamp for a predetermined time of a burst; superimposing ignition pulses on the takeover voltage in such a way that the voltage of the ignition pulses and the takeover voltage are added up and an interruption being provided between two bursts; and changing the ignition pulses from burst to burst or within a burst from the positive half-cycle of the takeover voltage to the negative half-cycle of the takeover voltage, and vice versa.

Abstract: Production of a photovoltaic element, more particularly of a solar cell. In this case, an additional silicon dioxide layer is used, which is produced by UV irradiation with a wavelength of less than 200 nm and can improve the interface properties on the silicon and can help to reduce disturbances known by the expression “background plating”.

Abstract: In various embodiments, an emitter for the irradiation of surfaces is provided. The emitter may include: an emitter vessel and an emitter base connected thereto, wherein the emitter base has at least one gas opening, which is designed for supplying a process gas into a spatial area adjacent to the emitter vessel.

Abstract: A high-pressure discharge lamp having an ignition aid is provided. The discharge lamp may include: a discharge vessel consisting of ceramic or quartz glass which is sealed at two ends and which is accommodated in an outer bulb which is likewise sealed at two ends, the discharge vessel having two ends in which electrodes are fastened, two power supply lines holding the discharge vessel in the outer bulb, a UV enhancer with a single electrode as ignition aid being accommodated in the outer bulb, wherein the UV enhancer is positioned in the vicinity of a second end of the discharge vessel, while a feed line is routed from the first power supply line along the discharge vessel and is connected to the UV enhancer, the feed line being capacitively coupled to the first power supply line, the UV enhancer being installed between the feed line and the second power supply line.

Abstract: A high-pressure discharge lamp may include a quartz glass bulb which encloses a discharge volume, and a fill which contains mercury and noble gas as well as metal halides being held in the discharge volume, wherein the fill contains both dysprosium halides and also oxyhalides of at least one of tungsten and mercury based on at least one of the halogens bromine and chlorine.

Abstract: A luminophore from the class of nitridic or oxynitridic luminophores with at least one cation M and an activator D, wherein a proportion x of the cation is replaced with Cu and D is at least one element from the series Eu, Ce, Sm, Yb and Tb

Abstract: In at least one embodiment of the surface light guide, the surface light guide includes at least one scattering element for scattering light. A decoupling coefficient is caused by the scattering element. The decoupling coefficient is set in a varying fashion along a main light-guiding direction. In a direction perpendicular to the main sides of the surface light guide, the opacity value is no more than 0.10, the transmission coefficient is at least 0.75 and the quotient of the minimum light density and maximum light density seen over a continuous emitting area of at least one of the main sides is at least 0.75.

Abstract: A heat sink may be constructed from at least one sheet-metal part and may include at least one flow structure, wherein the flow structure is configured to guide cooling air along an inner side of the heat sink, and wherein the flow structure is configured to direct the cooling air at least partially along a longitudinal axis of the heat sink on the inner side of the heat sink.

Abstract: In various embodiments, a high pressure discharge lamp is provided having a bulb, which surrounds a discharge volume, wherein a filler, which contains indium halide, quicksilver and inert gas from the group neon, argon, krypton, xenon, is accommodated in the discharge volume, wherein the filler simultaneously contains the halide of iodine and bromine, wherein the portion of InI amounts at most to 90 mol %, in respect of the total of all halides of In.

Abstract: A lighting system may include a housing for a lighting module and at least one profiled element which can be coupled to the housing and protrudes from the housing when coupled to the housing. The housing has an external surface with a plurality of channels and comprises a plurality of seats. The profiled element may have a first engagement formation insertable into one of the channels of the housing and a second engagement formation insertable into one of the seats of the housing when the first engagement formation is inserted in the channel. Blocking means movable into a first and into a second operative position, may be.

Abstract: The present invention relates to a light source unit having at least one LED sub light source unit. Each LED sub light source unit includes three types of LEDs: phosphor converted green LED, orange-red LED with a wavelength of 614 nm-622 nm, and blue LED with a wavelength of 460 nm-476 nm. Light generated by the three types of LEDs is mixed to generate white light.

Abstract: A device for mounting lighting sources on a substrate includes a mounting frame provided with fixing formations for fixing on the substrate, the mounting frame defining a cavity for receiving the lighting source which rests on the substrate. A locking member may be provided which can be positioned in the cavity of the mounting frame to urge said lighting source toward the substrate. At least one of the mounting frame and the locking member may include at least one retaining formation for the lighting source, including one or more pins extending into corresponding openings in the lighting source, and/or one or more elastic fins extending from the mounting frame to elastically contact the lighting source.

Abstract: A reflector for light radiation sources, the reflector taking the form, for example, of a cup centered around a main axis with a bottom opening for a source of light radiation, the reflector including a cup-shaped base portion extending from the bottom opening to an outer rim, and an annular portion surrounding the outer rim. The annular portion may be telescopically coupled to the base portion and may be moveable with respect to the base portion along the main axis in order to vary the length over which the annular portion extends along the main axis with respect to the outer rim of the base portion.

Abstract: A circuit for driving a plurality of light sources via a current generator, wherein the light sources are grouped into a plurality of light source sets wherein the driver circuit comprises a plurality of inductive elements, a plurality of switches adapted to selectively connect each light source set in series with one of the inductive elements, and a control circuit configured for driving the switches, so that during a first operation time interval, each light source set is connected in series with a respective first inductive element, and during a second operation time interval, each light source set is connected in series with a respective second inductive element, wherein the respective second inductive element is separate from the respective first inductive element.

Abstract: The present invention relates to an electronic assembly which includes a printed circuit board and at least two I-type inductors arranged on the printed circuit board, the I-type inductor include an I-type magnetic pillar, respectively, wherein the magnetic pillars of the at least two I-type inductors are arranged in such a manner that a first end surfaces of the magnetic pillars are non-coplanar with each other and/or the second end surfaces of the magnetic pillars are non-coplanar with each other. In addition, the present invention further relates to an LED retrofit lamp having such electronic assembly.

Abstract: An LED lighting device may include an LED support, which is populated with at least one LED on a front side thereof and a rear side of which is fastened to a rest. The front side of the LED support may be overarched by an electrically insulating, light-permeable and diffusely scattering LED cover, and the LED cover may be overarched by a protection cover resting on the support.