Abstract: An LED luminaire, which comprises an LED array of LED elements and an optical element. The optical element comprises one or more partially reflective or partially transmissive elements, which are positioned to lie perpendicular to a plane of the LED array. In this way, the partially reflective elements create virtual sources or virtual LED elements, by reflecting part of the light emitted by an LED element, whilst allowing the original or “real” LED element to still be visible by partially transmitting the light.

Abstract: The present invention relates to a color tunable and/or color temperature tunable LED filament (20, 22, 24), said LED filament comprising an elongated carrier (220), said elongated carrier comprising a first major surface (222) and a second major surface (224) arranged opposite to said first major surface, a plurality of LEDs (210) arranged in at least one linear array on said first surface of said elongated carrier, wherein the plurality of LEDs includes LEDs of different colors and/or different color temperatures, a first elongated transparent or substantially transparent layer (230) covering the plurality of LEDs on the first major surface and also at least partly covering said first major surface, and a first elongated light scattering layer (240), arranged to at least partially cover said first transparent or substantially transparent layer.

Abstract: The present invention relates to a light mixing chamber (100). The light mixing chamber (100) comprising: a first light mixing chamber part (120) comprising a light exit window (122) and a first side wall (124) having a first groove (126); a second light mixing chamber part (140) comprising a bottom wall (142) and a second side wall (144) having a second groove (146); and an LED substrate (160) supporting a plurality of LEDs (162,164,166,168). The LED substrate (160) is arranged into the first (126) and second grooves (146), interconnecting the first and the second light mixing chamber parts (120,140) such that the light mixing chamber (100) is formed. The plurality of LEDs (162,164,166,168) of the LED substrate (160) is facing an inner cavity (180) of the light mixing chamber (100).

Abstract: The present invention relates to a light emitting device comprising one or more LED light sources and one or more diffusely transmissive covers. The one or more diffusely transmissive covers extend over the one or more LED light sources to form one or more combinations of an LED light source and a diffusely transmissive cover. For each combination of an LED light source and a diffusely transmissive cover (i) the diffusely transmissive cover is dome-shaped with a vertical cross-section having a closed convex shape and a horizontal cross-section having a polygonal shape, (ii) the diffusely transmissive cover has a width (w) projected in a horizontal plane parallel to a bottom of the diffusely transmissive cover, (iii) the LED light source has a distance (d) to any neighboring LED light source. The width (w) and the distance (d) are perpendicular to each other, and the ratio of the width (w) and the distance (d) is constant.

Abstract: The invention provides a light generating device (1000) comprising (i) a tubular enclosure (100) and (ii) a plurality of light sources (200) configured to generate light source light (201) configured within the tubular enclosure (100), wherein the light sources (200) comprise solid state light sources, wherein the enclosure (100) comprises an enclosure material (300) that is transmissive for at least part of the light source light (201), wherein the enclosure material (300) comprises polymeric foam material (310), wherein the polymeric foam material (310) has a volume fraction of gas voids (320) relative to the total volume of the polymeric foam material (310) including the gas voids (320) selected from the range of 10-95 vol. %, wherein the tubular enclosure (100) has a tube length (L1) of at least 400 mm and a wall thickness (w1) selected from the range of 0.5-6 mm.

Abstract: A luminaire (500) comprising a linearly polarized light source (200) and a collimating reflector (301) arranged to collimate light from the light source towards an optical axis OA. The reflective inner surface of the reflector comprises at least one set of grooves (306), or four spaced zones of grooves, which each extend in a respective plane including the optical axis. Each groove comprises two flat side surfaces to cause light from the light source to undergo a double reflection in the groove, to avoid rotation of each beamlet and thus to reduce loss of imaging of the source. This partly preserves the linear polarization of the source, for use in reducing glare in displays or from lights on the road, or enhancing sparkle for illuminating jewellery.

Abstract: It is an object of the invention to provide an improved LED filament lamp (10), the LED filament lamp (10) comprising: a transparent envelope (11) provided with a transparent optical structure (12); at least one LED filament (14) enclosed by the transparent envelope (11); wherein the transparent optical structure (12) comprises a plurality of individually spaced prismatic grooves (17) and/or ridges that are at least partly aligned along a projection of the at least one LED filament (14) on the transparent envelope (11); wherein each prismatic groove (17) and/or ridge of the plurality of individually spaced prismatic grooves (17) and/or ridges comprises a refractive facet (171) oriented at a wedge angle (172) between 5 and 50 degrees with a tangent of the envelope (11) at the location of the respective prismatic groove (17) and/or ridge.

Abstract: A light emitting diode, LED, filament arrangement (100), comprising at least one LED filament (120) comprising an array of a plurality of light emitting diodes (140), LEDs. The LED filament comprises a substrate (150) on which the plurality of LEDs is arranged. The substrate surface comprises at least one of a multi-faceted surface structure (160), a lens structure (161), and a grating structure (162) and is configured to at least partially refract, at least partially reflect, and/or at least partially diffract the light emitted from the at least one LED filament during operation.

Abstract: A lighting device (100), comprising a plurality of light sources (110), a cover (120) comprising an at least partially light-transmissive material, wherein the cover at least partially encloses the plurality of light sources, and a plurality of reflectors (130) arranged within the cover and at respective peripheral portions of the cover, wherein a first set of light sources (140) is arranged within the plurality of reflectors such that the light sources within each reflector is configured to emit a respective bundle of light from the lighting device, and wherein a second set of light sources (150) is arranged outside the plurality of reflectors and configured to emit light from the lighting device, wherein the lighting device further comprises a control unit (160) configured to individually control the operation of the first and second sets of light sources.

Abstract: A lighting device (1) is provided. The lighting device comprises at least two light-emitting diode, LED, filaments (11). The lighting device further comprises at least two optical modules (12). Each optical module (12) is arranged in relation to a corresponding one of the LED filaments (11) to receive light emitted by the corresponding one of the LED filaments (11). Each optical module (12) is configured to collimate the received light and produce a collimated light beam so as to increase the degree of collimation of the light produced by the optical module (12) as compared to the light received by the optical module (12). The light produced by each optical module (12) is emitted from the lighting device (1). Further, the optical modules (12) are arranged in relation to each other such that collimated light beams of the respective ones of the optical modules (12) are oriented in different directions.

Abstract: A light emitting device (1) comprising at least one LED filament (2) comprising a flexible substrate (3) and a plurality of LED light sources (4) arranged on the flexible substrate (3), and an encapsulation (5a, 5b) encapsulating the plurality of LED light sources (4) and at least a part of one side of the flexible substrate (3), where the at least one LED filament (2) comprises at least one knot (6) in the form of intentional complication in cordage of the at least one LED filament (2), and where the intentional complication in cordage is any one of a fastening made by looping the at least one LED filament (2) on itself or together with a further LED filament and tightening it, and an intentional complication in cordage in which the at least one LED filament (2) is interlaced with at least one further LED filament at right angles to one another.

Abstract: A luminaire (10) has first light source (30) which provides light into a light mixing chamber (20) such that un-collimated light reaches the light output face (26) of the light mixing chamber (20), and a second light source (32) which provides collimated light to the light output face (26). The luminaire (10) can thus produce a diffuse flat light output and/or a directed partially collimated light output for example for task lighting.

Abstract: A light emitting diode, LED, filament arrangement (100), comprising at least one LED filament (120) comprising an array of a plurality of light emitting diodes (140), LEDs, is provided. The LED filament arrangement comprises at least one light distribution element (200a, 200b) comprising a solid, at least partially translucent material at least enclosing the at least one LED filament. The at least one light distribution element has a conical shape and is configured to at least partially refract, and at least partially reflect by total internal reflection, the light emitted from the at least one LED filament during operation.

Abstract: A lighting device (1) comprising: a substrate defining a plane; at least one solid-state light source mounted on the substrate, an outer light-transmissive envelope (2), and a light-transmissive wall which is arranged at a circumference of the substrate and which has an extension along and is curved towards an optical axis (A) of the lighting device (1). The light-transmissive wall comprises an edge portion distal to the substrate, which edge portion is adapted to diffuse light from the at least one solid-state light source such that a shadow on the outer light-transmissive envelope (2) is blurred, the shadow being caused by an electrical component mounted on the substrate and blocking light emitted by the at least one solid-state light source.

Abstract: There is disclosed alighting device (8) comprising: at least one light-emitting filament comprising (12) a plurality of solid-state light sources (14); and an elongated reflector (9) arranged to reflect light emitted by the light-emitting filament (12), wherein the reflector (9) has a longitudinal groove (11) in which the light-emitting filament (12) is arranged such that the reflector (9) and the at least one light-emitting filament (12) extend longitudinally along a common path, and wherein said path is curved in three dimensions. A light bulb (5) comprising the lighting device (8) and a luminaire (1) comprising the lighting device (8) are also disclosed. The lighting device (8) can be produced cost-efficiently and adapted to conform well to a predetermined emission pattern.

Abstract: A light emitting device (1) comprising at least one light source (2) adapted for, in operation, emitting light, the at least one light source (2) comprising a light emitting surface (21), and a light guide (3) comprising a top surface (31), a bottom surface (32) and a light incoupling edge (33) extending between the top surface (31) and the bottom surface (32), where a plane (4) is defined as extending in parallel with at least one of the top surface (31) and the bottom surface (32) of the light guide (3), where the at least one light source (2) and the light guide (3) is arranged in such a way with respect to each other that the light emitting surface (21) of the at least one light source (2) and the light incoupling edge (33) of the light guide (3) face each other, that the light incoupling edge (33) of the light guide (3) extends in a first angle (?) with respect to said plane (4), and that the light emitting surface (21) of the at least one light source (2) extends in a second angle (?) with respect to sa

Abstract: A light guide (1) for a lighting device (8) is provided. The light guide (1) comprises an incoupling element (2) configured for receiving light and coupling the received light into the light guide (1). The light guide (1) is configured to convey the received light within the light guide (1). The light guide (1) comprises at least a first group and a second group of conically shaped outcoupling surface structures (3) distributed on, and recessed into or protruding from, a side (4) of the light guide (1). Each conically shaped outcoupling surface structure (3) is configured for coupling of light out of the light guide (1). Further, each conically shaped outcoupling surface structure (3) of the first group is geometrically characterized by a shape in accordance with a first cone or conical frustum (5) and each conically shaped outcoupling surface structure (3) of the second group is geometrically characterized by a shape in accordance with a second cone or conical frustum (6).

Abstract: Starting sheet material (1) adapted for forming a reflector (2) for a lighting device (40), the starting sheet material (1) comprising a flat reflective sheet material (14) shaped as a sector of an annulus bendable into a parabolic reflector or a truncated cone reflector, the flat reflective sheet material (1) comprising a first surface (3), a second surface (4), a first edge (5) shaped as a segment of a circle with a first radius and a second edge (6) shaped as a segment of a circle with a second radius, the second radius being smaller than the first radius, a third edge (7) and a fourth edge (8), the third edge (7) and the fourth edge (8) extending between said first edge (5) and said second edge (6), wherein optical structures (9) are provided on at least a part of one of the first surface (3) and the second surface (4), said optical structures (9) enabling collimation and beam shaping of incident light, said optical structures (9) being applied to the flat reflective sheet material (14) along a direction

Abstract: The invention provides a light generating device (1000) comprising:—a light source (100) comprising a light emitting surface (110), wherein the light source (100) is configured to generate light source light (101), wherein the light emitting surface (110) is configured in a light chamber (200);—the light chamber (200), wherein the light chamber (200) is at least partly defined by a chamber wall (210), wherein the chamber wall (210) comprises: (i) a first part (211), wherein the first part (211) is transmissive for the light source light (101), wherein the first part (211) has a first reflectance R1 for the light source light (101), and wherein the first part (211) has a first part area (A1); and (ii) one or more second parts (212), wherein each second part (212) is transmissive for the light source light (101), has a second reflectance R2 for the light source light (101), and wherein the one or more second parts (212) together have a second part area (A2), wherein R1?R2?20%, wherein 65%?R1<100%, and wherei

Abstract: The invention provides a lighting device (10) comprising (i) a plurality of elongated filaments (100) and (ii) an optical element (200), wherein: —each elongated filament (100) comprises a support (105) and a plurality of solid state light sources (110), wherein the elongated filament (100) has a first axis of elongation (120) having a first length (L1), wherein the elongated filament (100) is configured to generate filament light (101) over at least part of the first length (L1); and—the optical element (200) comprises a plurality of facets (210), wherein the optical element (200) has a second axis of elongation (220) having a second length (L2), wherein the optical element (200) has a non-circular cross-section perpendicular to the second axis of elongation (220), wherein the optical element (200) is configured between at least two of the plurality of elongated filaments (100), and wherein the optical element (200) is configured to redirect at least part of the filament light (101).