Abstract: A circuit for actuating a lighting module, comprising at least two semiconductor light-emitting elements (D1, D2) which are connected in series in a first operating mode; wherein, in the event of a predetermined threshold value for an operating voltage (101) being undershot, a second operating mode is detectable (102); and wherein, in the second operating mode, the at least two semiconductor light-emitting elements (D1, D2) are alternately actuable.

Abstract: A semiconductor light-emitting device is disclosed. The device includes a plurality of semiconductor light sources and a driver with no galvanic isolation for operating the semiconductor light sources wherein the semiconductor light sources may be divided into at least two carriers, the carriers are applied on an electrically conductive substrate, and the driver, and current-conducting regions also provided on a surface of the carriers, are electrically insulated from the substrate.

Abstract: A light guiding structure comprising a light guiding element (2) optically connected to a light source (6) and an optical element (10) coupled thereto, wherein the surface of the optical element (10) remote from the light guiding element (2) has the shape of a section (11) of a rotational ellipsoid, wherein a geometric cutting plane of the section (11) extends approximately at right angles to the longitudinal axis of the rotational ellipsoid.

Abstract: A reflector assembly for a lighting device including a plurality of reflectors for at least one semiconductor light source each, wherein the reflectors are reflector sub-regions of a common, continuous sheet-metal part and the reflector sub-regions have wing regions bent at least partially from the sheet-metal part. A lighting device includes at least one reflector assembly, wherein at least one semiconductor light source is arranged on the sheet-metal part. A method may be used to produce a reflector assembly, wherein the method includes at least the following steps: introducing slits into a sheet-metal part in order to provide wing regions that can be bent from the sheet-metal part; and bending over the sheet-metal part including bending out the wing regions in order to form at least one reflector. The above can be applied in particular to lamps for general lighting, in particular for area lighting.

Abstract: A lighting device for mounting on a mounting surface may include: a planar solid state lighting module having a light emitting region and peripheral holes for fixing members to the mounting surface to extend therethrough, a peripheral gasket extending along the periphery of the lighting module; the gasket having, at the holes of the lighting module, ear-like extensions having a perforation therein, said ear-like extensions extending inwardly of the gasket to align the perforations therein with the holes in the lighting module, a housing which frames the lighting device with the gasket applied onto the lighting module. The housing has apertures aligned with the holes in the lighting module and the perforations in the ear-like extensions of the gasket, as well as a window to expose the light emitting region of the lighting module, with a light permeable screen which sealingly closes said window.

Abstract: A reflector/imaging optical element (11; 43) which is configured in order to transmit light (P1) of at least one first wavelength, concentrate light (P1) shone through the reflector/imaging optical element (11; 43) onto a first focal point (F) and reflect light (R) of at least one second wavelength, shone from the first focal point (F) onto the reflector/imaging optical element (11; 43), onto a second focal point (F?) of the reflector/imaging optical element (11; 43).

Abstract: A lighting module may include a housing having an open rear side, a light source substrate with at least one light source arranged thereon, a driver circuit board accommodated in the housing, at least one electrical connection element for electrically connecting the driver circuit board to the light source substrate, and a closure element for closing the open rear side, wherein the closure element is designed for feeding through at least one electrical connection.

Abstract: A method of placing on a mounting substrate light radiation sources arranged in successive sequences wherein each sequence includes light radiation sources from different bins having respective light emission characteristics and wherein the sequential order of recurrence of the light radiation sources of the various bins is repeated over the sequences, may include placing the light radiation sources on the mounting substrate in at least two juxtaposed rows, wherein each row includes light radiation sources arranged in a zigzag pattern to produce an chessboard-like array of light radiation sources.

Abstract: An illumination device comprising at least one reflector and at least one light generating unit, wherein the at least one reflector is designed and arranged to reflect at least a portion of a light emitted by the at least one light generating unit into a spatial region that cannot be directly irradiated thereby, and the at least one light generating unit comprises at least one illuminating region having a substantially uniform emission characteristic in a circumferential direction of the illumination device.

Abstract: In various embodiments, a lamp has a bulb with a pinch seal, which holds a light-emitting element by means of a wire clip. The wire clip consists of tungsten and has, at an end remote from films embedded in the pinch seal, an eyelet for holding the light-emitting element. An end of the wire clip which is close to a film is bent back. A film associated with the wire clip is folded in a roof-shaped manner. Overall, it is thus possible to realize a lamp with a long life.

Abstract: In various embodiments, a lighting device may include a plurality of semiconductor light sources, and an apparatus configured to operate the semiconductor light sources. The apparatus has switching means, by which the semiconductor light sources can be divided in groups for operation with the apparatus.

Abstract: An LED lighting assembly may include a printed circuit board with an LED chip, and a heat sink thermally conducted with the printed circuit board, wherein the LED lighting assembly further comprises a light guide body configured as a bulb, the light guide body having an end surface as a light incidence surface of light from the LED chip, an outer surface as a light emergent surface and an inner surface, wherein the inner surface is structured so as to form a reflecting surface, reflecting at least part of light from the end surface to the outer surface.

Abstract: A base configured to carry a light emitting body and to be inserted into a round tube housing, may include: a rectangular portion configured to carry the light emitting body on a first surface of the rectangular portion; and first and second fixing portions configured to extend from first and second long edges of the rectangular portion respectively in a space that a second surface of the rectangular portion faces, such that when the base is inserted into the round tube housing, at least a part of each of the first and second fixing portions presses against the inner wall of the round tube housing, and a first part close to the first long edge and a second part close to the second long edge in the first surface of the rectangular portion press against first and second protrusions on the inner wall of the round tube housing respectively.

Abstract: A device for mounting planar lighting sources having a light emitting surface on a substrate includes a frame provided with fixing formations for fixing the frame on the substrate with the planar lighting source sandwiched between the frame and the substrate. The frame has an opening to surround the light emitting surface of said lighting source and is provided with elastic formations to elastically urge the lighting source toward the substrate. The fixing formations include at least one resilient formation to resiliently urge the frame toward the substrate.

Abstract: A lens (12; 32; 42; 52) comprising a transparent main body (13; 43; 53), wherein a surface (14, 15; 14, 45; 54, 55) of the main body (13; 43; 53) is at least partly covered with an internally reflecting reflection layer (17), the lens (12; 32; 42; 52) has at least one first focal point (F1) and at least one second focal point (F2), at least the first focal point (F1) lies at least partly on a non-covered surface region of the main body (15; 45; 55), and at least one phosphor element (18) bears against the main body (13; 43; 53) at a contact region (19) having at least one first focal point (F1).

Abstract: Various embodiments may relate to a circuit arrangement for operating at least one discharge lamp having a commutation device and a control device which is coupled to the commutation device. A first measuring device is used to determine in each case first measurement values, which represent a measure of the magnitude of electrode peaks of the discharge lamp, within a test operating phase in which the first electrode and the second electrode are supplied with energy in an asymmetrical manner. A second measuring device is used to determine a second measurement value which is correlated with the current through the discharge lamp at least during the test operating phase. The control device is designed to actuate the commutation device at least as a function of the determined first measurement values and second measurement values. Various embodiments further relate to a corresponding method for operating at least one discharge lamp.

Abstract: A lighting device may include at least one semiconductor light source cast with at least one first casting compound, wherein at least one region of the lighting device has: at least one connection area, which is electrically connected to the at least one semiconductor light source, and at least one electrical connecting element, which has at least one electrical line, wherein at least one electrical line is connected to an associated connection area and protrudes at one end out of the lighting device, and the at least one connection area and the at least one electrical connecting element are arranged in a cutout in the first casting compound and are cast by means of a second casting compound.

Abstract: A lighting device may include a reflector, which can be illuminated by means of at least one light source, in particular light emitting diode, and an aperture disposed downstream of the reflector and having a rear side facing the reflector and a front side facing away from the reflector. The lighting device may include at least one additional light source for illuminating the front side of the aperture, and the front side of the aperture is covered at least in regions with at least one phosphor which is sensitive to light emitted by the at least one additional light source.

Abstract: A phosphor LED for emitting light emitting diode light may include an LED designed for emitting blue primary light; and an LED phosphor designed and arranged such that it is excited by the primary light during operation and emits secondary light as a consequence, said secondary light forming at least a portion of the LED light. The LED phosphor may include a green phosphor and a red phosphor. The green phosphor and the red phosphor may be provided in a ratio such that the light emitting diode light in the CIE standard chromaticity system has a color locus in the green which is spaced apart from the Planckian locus, to be precise by at least 0.01 in terms of absolute value.