Abstract: A reflector (1; 31; 41) for a lighting device comprising: (13; 61; 62), at least one rear cutout (6) for a light source (20; 47; 56) in each case and at least one front-side reflector opening (8), wherein at least one spring element (10; 34; 45) is incorporated into the reflector (1; 31; 41).

Abstract: Various embodiments relate to a heat radiation device for a heat source. The heat radiation device includes a body and a coating layer, wherein the body has a first section and at least one second section projecting from the first section, the first section has a mounting surface for mounting and thermally contacting with the heat source and the coating layer is applied on the surface other than the mounting surface of the first section and a surface of the at least one second section, wherein the coating layer has higher thermal dissipation performance than the body. In addition, various embodiments further relate to an illuminating device having the above type of heat radiation device.

Abstract: A lighting device may include a mounting board with first and second opposed faces and vias extending therethrough, one or more light radiation sources mounted on the first face of the mounting board, drive circuitry for the light radiation source mounted on the second face of the mounting board, with electrically conductive lines between the light radiation source and the drive circuitry passing through said vias, a vat-like holder housing the mounting board with the light radiation source and the drive circuitry mounted thereon. The holder has cavities for receiving therein the drive circuitry with the first face of the mounting board and the light radiation source mounted thereon facing outwardly of the holder. Over the first face of the mounting board at least one sealing layer is applied, which ensures an IP grade protection of device.

Abstract: An electronic ballast for operating at least one first cascade of LEDs may include an input for coupling to an AC supply voltage, a rectifier that is coupled to the input, wherein the rectifier has an output having a first and a second output connection, a first unit that includes the first cascade of LEDs, wherein the first unit is coupled to the first output connection of the rectifier, a series circuit including an inphase regulator and a shunt resistor, wherein the series circuit is coupled between the first unit and the second output connection of the rectifier, a setpoint value prescribing apparatus for the inphase regulator having an output that is coupled thereto, wherein the setpoint value prescribing apparatus provides a first setpoint value element at its output, and a second setpoint value element—superimposed on the first setpoint value element—for the inphase regulator.

Abstract: A method for operating a high-pressure discharge lamp with a variable power is disclosed. Said method utilizing at least the following steps: (a) providing high-pressure discharge lamp, which has a nominal operating power; (b) operating the lamp with an instantaneous power, where the instantaneous power lies within relative lower and upper power limits, respectively, and said limits may depend on an average power, and said instantaneous power may lie within a predetermined absolute lower and upper power limit; (c) determining the average power from a one-sided moving average value of the instantaneous power or the exponential smoothing of the instantaneous power of a time segment of predefined length.

Abstract: A semiconductor lamp includes a reflector having a lower side and an upper side, wherein the lower side widens laterally and wherein the lower side and the upper side are separated from one another by an upper rim, and having a first light source group having at least one semiconductor light source and a second light source group having at least one semiconductor light source, wherein the reflector is provided as a cooling body for the first light source group and for the second light source group; wherein at least a part of a light that can be emitted by the first light source group can be reflected by means of the lower side of the reflector at least into a spatial angle range that cannot be directly illuminated by the first light source group.

Abstract: A lighting apparatus includes semiconductor light sources and a heat sink for the semiconductor light sources, wherein the lighting apparatus has a carrier element for at least one first group and one second group of luminous elements, said carrier element being connected to the heat sink and projecting from a side of the heat sink, and wherein the first group and second group of luminous elements are arranged on surface regions of the carrier element and in each case comprise at least one semiconductor light source, wherein a further group of luminous elements is arranged at the side of the heat sink from which the carrier element projects, and the further group of luminous elements comprises at least one semiconductor light source.

Abstract: A dual fluorescent wheel with two disk-shaped carrier elements which are interconnected by wing-type cooling ribs is disclosed. When the dual fluorescent wheel rotates, air flows in through an axial opening in one of the carrier elements, the air flows radially through the interspace between the carrier elements or the wing-type cooling ribs and flows out at the edge. This airflow improves the dissipation of heat which is produced when an excitation laser irradiates the annular fluorescent strips located on the two exterior faces.

Abstract: A projection device may include at least one first laser device and one second laser device, which is arranged opposite the first laser device. A prism is arranged between the two laser devices, wherein a polarization-dependent mirror device is arranged in the prism in such a manner that the beam of the first laser device is reflected in a direction that extends opposite the direction in which the beam of the second laser device is reflected. The polarization of the beam of the second laser device is then rotated, and the beam is deflected back to the polarization-dependent mirror device. The beam of the second laser device now passes through the mirror device without reflection due to the change in the polarization of the beam of the second laser device, such that two superposed laser beams of different polarization are available at the output of the projection device.

Abstract: A method for producing an LED lamp includes a lamp housing wherein at least one carrier circuit board equipped with LEDs is inserted into the lamp housing in such a way that at least a subregion of the lamp housing protrudes beyond the carrier circuit board with a projection, and the projection is at least partially deformed after insertion in such a way that the lamp housing is pressed with the carrier circuit board.

Abstract: A lighting device may include a semiconductor light source module, an optical unit, and a common support for the semiconductor light source module and the optical unit. The optical unit is mounted on a front side of the support and has at least one dowel, which extends into a precisely fitting hole in the semiconductor light source module. The semiconductor light source module rests on a rear side of the support. The at least one dowel projects through an aperture in the support and extends into the precisely fitting hole in the semiconductor light source module. The at least one dowel forms a shoulder, which rests on a supporting surface of the semiconductor light source module that rests on the rear side of the support.

Abstract: A connecting element can be used for a multi-chip module. The connecting element is provided for establishing an electrical connection between two elements and has a carrier and a first electrically conductive connecting structure on a first main surface of the carrier. The first connecting structure is designed in such a way that the first connecting structure connects the first and second elements to each other. A multi-chip module can have such a connecting element and two elements, wherein the two elements are electrically connected to each other in a wireless manner by the connecting element.

Abstract: A phosphor wheel for converting pump light to conversion light, on which a first phosphor for emitting conversion light of a first color and a second phosphor for emitting conversion light of a second color are provided. The light of first and second phosphors, which are arranged in a manner spatially separated from one another on the phosphor wheel, has the same hue in this case. Depending on the requirement, either the first or the second phosphor can thus be selected.

Abstract: In various embodiments, a lighting device includes at least one laser light source and a light wavelength conversion element. The light wavelength conversion element includes phosphor which is arranged on a surface region of a substrate and is used for wavelength conversion of the light emitted by the at least one laser light source. The light wavelength conversion element has a greater thickness at the edge of the surface region, provided with phosphor, of the substrate than at the surface centroid of the surface region, provided with phosphor, of the substrate. The thickness is respectively measured perpendicularly to the surface region, provided with phosphor, of the substrate.

Abstract: In various exemplary embodiments, an illumination arrangement is provided, including a light source for providing laser light and a diffusely reflective material and/or a phosphorescent material and/or a fluorescent material, which is arranged on a surface in the illumination arrangement in such a way that light provided by the light source impinges on the material, wherein the surface forms a hollow body having one or more partial surfaces which are arranged in a manner facing one another at least in part in such a way that light reflected or generated by material arranged on one partial surface impinges at least partly on material arranged on the same or another partial surface of the surface, and both the incidence of the laser light and the emission of the reflected or generated light are effected via the same surface of the one or more partial surfaces.

Abstract: Various embodiments may relate to a circuit arrangement and a method for operating and dimming at least one LED. In this case, the LEDs are supplied from a bridge arrangement, wherein, in order to dim the at least one LED, the frequency of the control signals is increased with increasing dimming until a predefinable dimming threshold value. In order to adjust dimming values which are below the predefinable dimming threshold value, the output signal of the bridge arrangement is short-circuited by means of a short-circuit device during predefinable periods.

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: A converter for feeding a load via an inductor with a current having a controlled intensity between a maximum level and a minimum level may include: a switch switchable on and off to permit or prevent, respectively, feeding of current towards said inductor; first and second current sensors sensitive to the current flowing through said switch when said switch is on or off, respectively; comparator circuitry to identify if the current intensity detected by said first current sensor and said second current sensor reaches said maximum level and said minimum level, respectively, by generating respective logical signals; and drive circuitry for said switch sensitive to said logical signals and configured to turn off said switch when the current intensity detected by said first sensor reaches said maximum level and turning on said switch when the current intensity detected by said second current sensor reaches said minimum level.