Abstract: In various embodiments, an electronic operating device for light sources is provided. The electronic operating device may include an input part for inputting an input voltage and an output part for outputting an output voltage and an output current for the light sources. The electronic operating device is configured to operate the output part as a voltage source for a period of time after the input voltage has been applied, and subsequently to operate the output part as a current source after this period of time.

Abstract: In various embodiments, a lamp is provided. The lamp may include two mutually opposite end sections, which each form an electrical contact of the lamp. In each case at least one semiconductor light source is arranged in the region of the end sections. The lamp has an operating apparatus for the semiconductor light sources. The operating apparatus has electrical components, which are arranged in the region of a first section of the lamp, and the operating apparatus has at least one further electrical component, which is arranged in the region of the second end section of the lamp.

Abstract: A lighting device provides a lighting unit for emitting useful light and a sensor. The unit includes a laser diode for emitting pump radiation and a phosphor element, which during operation is irradiated by the laser diode and thereby excited and serves for converting the pump radiation into conversion light, which conversion light at least proportionally forms the useful light. The sensor monitors the pump radiation conversion and at the same time detects a conversion light intensity, and is arranged with respect to the phosphor element of the unit so that a portion of the useful light and a measurement portion of the conversion light is incident on the sensor. The lighting device operates so that the phosphor element at least at times is irradiated in a pulsed manner and thereby excited so that between two pulses the conversion light intensity detected by the sensor decreases by at least 10%.

Abstract: A lighting device includes a light source, a reflector having an ellipsoidal reflection surface, an aspherical lens, and an exit pupil. The source is arranged at a first focal point of the reflection surface and a part of the emitted light is reflected from the reflection surface in the direction of a second focal point. The pupil is arranged offset with respect to the second focal point. The lens is arranged between the reflection surface and the pupil in a beam path with the reflected light and is shaped such that a first part of the reflected light passes through the lens with an aperture angle altered by not more than 5° in a central region and passes through the pupil and a second part of the reflected light penetrates through the lens in an outer region and is deflected by the lens and is consequently guided through the pupil.

Abstract: Various embodiments may relate to an illumination device for vehicles, including multiple semiconductor light sources, and at least one light wavelength conversion element for the wavelength conversion of the light emitted by the semiconductor sources. At least one light-refracting optical unit is associated with each semiconductor source, which is designed to direct light emitted by the respective semiconductor source onto the at least one light wavelength conversion element. The at least one light-refracting optical unit is movably arranged with respect to the semiconductor source with which it is associated.

Abstract: A lighting device may be produced by providing a protected elongate light emitting module, including a substrate with at least one electrically-powered light radiation source, and at least one sealing mass protecting light radiation source(s), and by coupling to said light emitting module a channel-shaped cover member with a body portion including light permeable material and side portions, with the side portions of the cover member embracing and locking therebetween the light emitting module and with light radiation source(s) facing towards body portion of cover member, whereby the light permeable material provides a propagation path for the light radiation from light radiation source(s).

Abstract: A lighting device includes an elongated support member, a plurality of light sources, at least one electrically conductive layer for interconnecting the light sources, and covering layer provided over the light source and conductive layer, the covering layer having discontinuities defining a marker array for cutting to length the lighting device.

Abstract: A lighting device, which may be used e.g. to produce motor vehicle lamps, may include a light radiation source, e.g. a LED source, having a light-permeable body arranged facing source for propagating light radiation along a longitudinal axis. The light-permeable body includes a collimator exposed to light radiation source and adapted to collect light radiation and to inject it into light-permeable body, a tapered portion coupled to collimator for receiving light radiation and directing it towards an output end, a distal portion acting as an emission filament, coupled to the output end of tapered portion, with an output mirror having a shank portion extending in said distal portion and a head portion, the output mirror reflecting light radiation radially from longitudinal axis and proximally towards said light radiation source.

Abstract: An irradiation apparatus includes a radiation unit for the emission of radiation in the form of a beam, a first microlens arrangement, downstream of the radiation unit, having a multiplicity of convergent microlenses, for dividing the beam into one partial beam per convergent microlens, and a convergent lens, downstream of the microlens arrangement, that overlays the partial beams, in an irradiated area. The microlenses have a first group and a second group. The microlenses in each group are identical, but the microlenses in the first group differ from the microlenses in the second group from their shape, size and/or focal length, so that a first region of the irradiated area, which is irradiated via the microlenses in the first group, differs from a second region of the irradiated area, which is irradiated by the microlenses in the second group, from its shape and/or its size.

Abstract: According to the present disclosure, a method for operating an illumination apparatus is provided. The method has at least two light-emitting devices, which are arranged next to one another separated by a gap and each have a multiplicity of light-emitting elements, by individually driving all light-emitting elements of each light-emitting device, measuring a gap width of the gap and/or a luminance in the gap, and controlling or regulating in each case a luminance of one or more of the light-emitting elements which are arranged directly at the gap in dependence on the gap width and/or on the luminance in the gap.

Abstract: Various embodiments relate to an irradiation device including a pump radiation source for emitting pump radiation, a conversion element for converting the pump radiation into conversion radiation of longer wavelength, and a reflection surface, which is reflective to the conversion radiation and on which backscattered conversion radiation emitted at a backscatter emission surface and thus counter to a useful direction is incident and is reflected therefrom back to the conversion element; said reflection surface is concavely curved relative to the conversion element in such a way that at least the backscattered conversion radiation emitted divergently from a surface centroid of the backscatter emission surface is incident on the reflection surface at an angle of incidence of at most 20° in terms of absolute value.

Abstract: A support structure for lighting devices, the support structure includes a ribbon-like support member with electrically conductive lines with mounting locations for electrically powered light radiation sources. The structure includes a sequence of adjacent units having opposed end regions and is severable between mutually facing end regions of adjacent units in the sequence. The units include, at the end regions, at least one electrical connection formation. The electrical connection formation includes a proximal portion electrically coupled to the electrically conductive lines of the respective unit, and a distal portion electrically insulated from the proximal portion. The distal portion is electrically coupled to the distal portion of an electrical connection formation provided in an adjacent unit to the respective unit in the sequence of adjacent units and is separable therefrom by severing the support structure.

Abstract: A lighting assembly, comprising: a casing having a bowl-like structure with a bottom wall defining a window opening; a radiation source board with a light radiation source situated opposite said opening so as direct said light radiation outside of the casing; and a driving circuit board for said radiation source, said boards being stacked together without air gaps in between, with said circuit board directed towards said casing.

Abstract: A circuit arrangement for operating at least a first and a second cascade of LEDs is provided including an input having a first and a second input connection for coupling to a rectified AC supply voltage, a voltage equalization series impedance, and at least a higher and a lower LED units which include cascades. The connection of the LED cascade that is not coupled to a first diode is a second node, and the second node of the lowest LED unit is coupled to a voltage equalization series impedance such that the impedance is coupled in series between the second node and the second input connection. In not-the-lowest LED unit, a fourth node is at any rate a node of the circuit arrangement that is at a lower potential, at least during a prescribable period during the circuit arrangement operation, than the second node.

Abstract: A lighting device includes a laminar support member bendable at bending lines extending in a common direction, the bending lines partitioning the laminar support member in a plurality of stripes. The plurality of stripes includes at least one first stripe with electrically-powered light radiation sources therealong and at least one second stripe free from light radiation sources forming a side wing for the at least one first stripe.

Abstract: A projection device for projecting at least one image onto a projection surface is provided. According to the present disclosure, a control device of the projection device is designed, on the basis of an evaluation of at least one measured value of a measuring device of the projection device determined during a drive of a discharge lamp of the projection device with a current waveform to be checked, to check the current waveform in respect of its suitability for minimizing an electrode burn-back of a first electrode and a second electrode, and in the case of a positive check result, to retain the checked current waveform, and in the case of a negative check result, depending on a checked commutation vector characterizing the checked current waveform, to create, by means of a specifiable algorithm, a modified commutation vector that characterizes a modified current waveform.

Abstract: A DC gas discharge lamp includes an anode and a cathode having a first cathode segment, which forms the surface of the cathode at least in a region of the cathode which faces the anode and has an arc attachment region, within which an arc burning between the cathode and the anode attaches during lamp operation as intended. The first cathode segment consists of tungsten with at least one emitter material for reducing the work function of electrons from the cathode. The cathode is embodied in a manner free of thorium. The at least one emitter material has a melting point of less than 3200 K. At least one part of the surface of the cathode outside the arc attachment region is formed by a diffusion barrier for the at least one emitter material.

Abstract: In various embodiments, a lighting device is provided. The lighting device includes a channel-shaped elongate profiled body having a central or web portion and two side portions sidewise of the web portion, a profiled body having mutually opposed undercuts opening inwardly of the channel shape of profiled body, and a light radiation source assembly including an elongate support board carrying one or more light radiation sources, e.g. LED sources, the support board having longitudinal sides extending into the said undercuts, wherein the light radiation source assembly is retained by the channel-shaped profiled body.

Abstract: A tracking system provides light source(s), a mobile communication unit and light sensor(s) with cameras, and a central control unit at least coupled to the sensor(s). The communication unit receives with its camera an identification information item broadcast by the light source(s) and broadcasts an activation signal, including data correlated with the received item, to the control unit. The control unit determines, based on the signal, at which position the communication unit is arranged and which sensor(s) is arranged relative to the position of the communication unit so that the communication unit can be detected by the camera of the sensor; activates the camera of the detected sensor(s) for providing image information by its camera to the control unit, to determine and identify a carrier of the communication unit at the determined position; and activates sensor(s) coupled to the control unit for tracking the identified carrier of the communication unit.

Abstract: An optical element is provided for beam shaping for radiation emitted by a radiation-emitting semiconductor chip. The optical element includes a radiation entrance face and a boundary surface different from the radiation entrance face with a first region and a second region. The first and second regions are arranged and embodied such that a first radiation portion of radiation entering the optical element through the radiation entrance face is reflected in the first region and after reflection in the first region is deflected in the second region towards a plane defined by the radiation entrance face.