Abstract: The invention provides a reflector (2) comprising a reflector wall (20), the reflector wall (20) comprising a first wall surface (22) and a second wall surface (23) defining said reflector wall (20), the reflector wall (20) comprising a light transmissive material (21), wherein the reflector wall (20) has a first dimension (d1) and a second dimension (d2) defining a first reflector wall area, wherein each wall surface (22,23) comprises a plurality of parallel arranged elongated corrugations (210), wherein the corrugations have corrugation heights (h2) relative to recesses (220) between adjacent corrugations (210) and corrugation widths (w2) defined by the distance between adjacent recesses (220) at the respective wall surfaces (22,23), wherein the corrugations (210) have curved corrugation surfaces (230) between said adjacent recesses (220) having corrugation radii (r2) at the respective wall surfaces (22,23), and wherein over at least part of one of the first dimension (d1) and the second dimension (d2) one

Abstract: The disclosure concerns a light-emitting module (100) comprising one or more flexible, elongated light-emitting diode, LED, strips (110) and a mixing chamber (150). Each LED strip comprises a first side (112) on which a plurality of LEDs (111) is mounted, a second side (113) opposite to said first side, and two lengthwise edges (114). The mixing chamber (150) is arranged to mix light emitted by said LEDs and comprises a base (151). One of the lengthwise edges (144) of each LED strip is arranged to face the base (151) of the mixing chamber. At least a portion of each LED strip (110) is bent (or folded) to extend radially from a center portion of the mixing chamber towards one or more outer points (132), so that the one or more light-emitting diode strips (110) together form a number N of elongated arms (130). Each elongated arm comprises two segments of the LED strip, where the segments form opposite sides of the elongated arm.

Abstract: A LED filament (100) comprising an elongated substrate (110), a first region (120), a second region (130) and a third region (140) arranged between the first and second region. The first region comprises a plurality of LEDs (121) of a first LED type configured to emit light with a first CCT, arranged along at least one row on the substrate. The second region comprises a plurality of LEDs (131) of a second LED type configured to emit light with a second CCT, different from said first CCT, arranged along at least one row on the substrate. The third region (140) comprises at least one first LED (141) of the first LED type and at least one second LED (142) of the second LED type. A first LED of the at least one first LED of the third region is located next to a second LED of the second region. A second LED of the at least one second LED of the third region is located next to a first LED of the first region.

Abstract: The invention provides a method for producing a 3D item by means of fused deposition modelling, the method comprising: (a) a 3D printing stage comprising: layer-wise depositing 3D printable material, wherein the 3D printable material comprises 3D printable core material and 3D printable shell material, to provide the 3D item comprising a core-shell layer of 3D printed material, wherein the 3D printed material comprises a core comprising 3D printed core material and a shell comprising 3D printed shell material, wherein the shell at least partly encloses the core, wherein the 3D printable core material comprises a pore forming material with a first concentration c1, wherein the 3D printable shell material comprises the pore forming material with a second concentration c2, wherein c2/c1?0.9; and (b) a pore forming stage comprising: heating one or more of (i) the printable material and (ii) the 3D printed material.

Abstract: The invention provides a method for producing a 3D item by means of fused deposition modelling, the method comprising a 3D printing stage comprising layer-wise depositing 3D printable material, to provide the 3D item comprising 3D printed material, wherein the 3D item comprises layers of 3D printed material, wherein the 3D printable material comprises thermoplastic material, wherein during at least part of the 3D printing stage the 3D printable material further comprises porous inorganic particles embedded in the thermoplastic material, wherein the porosity of the inorganic particles is in the range 5-60 vol. %, and wherein the inorganic particles (410) have an open porosity. The invention also comprises the product resulting from above method.

Abstract: There is presented a lighting device comprising: several light-emitting filaments (15, 15?) with solid-state light sources and a circuit board (10) with first and second electrically conductive tracks (13, 14) following first and second paths, respectively. Each light-emitting filament (15, 15?) comprises a first electrical contact (19, 19?) electrically connected to the first track (13) at a first point on the first path, and a second electrical contact (20, 20?) electrically connected to the second track (14) at a second point on the second path. The first and second points associated with each light-emitting filament (15, 15?) are arranged on an axis (A) which is non-perpendicular to a tangent (T1) to the first path at the first point and to a tangent (T2) to the second path at the second point. The lighting device may be adapted to emit light from what appears to be a surface according to an observer.

Abstract: The invention provides a light generating device (1000) configured to generate device light (1001), wherein the light generating device (1000) comprises a first light source (110), a first luminescent material (210), a second light source (120) of second light source light (121), and a second light source (130), wherein: the first light source (110) is configured to generate blue first light source light (111) having a first peak wavelength ?1 selected from the spectral wavelength range of 437-472 nm, wherein the first light source (110) is a first laser light source (10); the first luminescent material (210) is configured to convert at least part of the first light source light (111) into first luminescent material light (211) having an emission band having wavelengths in one or more of (a) the green spectral wavelength range and (b) the yellow spectral wavelength range, wherein the first luminescent material (210) comprises a luminescent material of the type A3B5O12:Ce, wherein A comprises one or more of Y,

Abstract: A lighting device (320) comprising at least one first light-emitting diode, LED, filament (100) adapted to emit light with a first correlated color temperature, CCT, and at least one second LED filament (200) adapted to emit light with a second, different, CCT. Each of the LED filaments is arranged to emit a first, larger, portion of light (112) from a first side (105), and a second, smaller, portion of light (114) from a second side (107). A longitudinal axis (A) extends from a base (322) of the lighting device to a top portion (330) of the envelope. Each of the at least one first LED filament is arranged at a first angle ( ) from the longitudinal axis, with its first surface generally facing towards the top portion of the lighting device, and each of the at least one second LED filament is arranged at a second angle ( ) from the longitudinal axis, with its first surface generally facing towards the base.

Abstract: A light emitting device (1) comprising an element (2) comprising a volumetric low scattering material, the element comprising opposite first and second light incoupling surfaces (21, 22) and a circumferential surface (23) extending between the first and second light incoupling surfaces, at least one red laser diode (3) configured to emit red laser light (31), and being arranged at one of the light incoupling surfaces such that the red laser light is coupled into the element through the said one of the first and second light incoupling surfaces, a collimator (4) arranged and configured to collimate the red laser light (31), at least one LED (5) configured to emit LED light, the LED being arranged at one light incoupling surface, such that the LED light is coupled into the element through the said incoupling surface, and the scattering material being configured to make the path of laser light visible.

Abstract: A method for determining a production of a luminaire (100) via 3D-printing, and a 3D-printing apparatus for production of a luminaire, and a luminaire, are provided. The method comprises the steps of defining a suspension point (110) of the luminaire, defining a fixation line (120) through the luminaire, defining a plurality of cross-sectional shapes (130) of the luminaire along the vertical axis, z, and for each cross-sectional shape of the plurality of cross-sectional shapes of the luminaire, minimizing a distance, R0, between the fixation point and a center of mass, Mt, of a first sector, S1, and a second sector, S2, of the cross-sectional shape.

Abstract: The invention provides a lighting device (1000) configured to generate lighting device light (1001), wherein the lighting device (1000) comprises (i) a first laser light source (10) configured to generate a beam (15) of first laser light source light (11), (ii) a speckle control element (30), and (iii) a control system (50), wherein in one or more control modes of the control system (50) the speckle control element (30) is configured in an optical path (16) of the first laser light source light (11) for providing the lighting device light (1001) comprising a speckle distribution (35) of the first laser light source light (11), wherein at a predetermined distance L from the lighting device (1000) the speckle distribution (35) has a first speckle contrast value C1 selected from the range of 3%<C1<100%, wherein the predetermined distance L is selected from the range of 0.

Abstract: The present invention relates to an optical structure for producing a decorative lighting effect in a lighting device, and a lighting device comprising at least one of the optical structure, wherein the optical structure comprises an optical element formed in one piece and comprising at least one opening; and an LED-filament comprising a substrate and a plurality of light sources arranged on the substrate, the substrate being at least partly made of a flexible material; wherein the at least one opening is adapted to receive the LED-filament such that a portion of the LED-filament extends through and is at least partly enclosed by a surrounding wall of the at least one opening such that the LED-filament is guided by and held in place by means of the at least one opening of the optical element and wherein light emitted from the LED-filament interacts with the optical element.

Abstract: The invention relates to an illumination device (10) comprising a plurality of concave shaped reflectors (20-1, 20-2), each reflector forming a reflector cavity (25) in which a light source (21) is provided for emitting light towards a light emission window (24). The illumination device of the above known kind is capable of emitting different light emission distribution thus improving its implementation in indoor applications.

Abstract: The invention provides a light generating system (1000) comprising a light generating device (100), a luminescent material layer (200), and optics (400), wherein: (I) the light generating device (100) is configured to generate polarized laser radiation (101); (II) the luminescent material layer (200) comprises a luminescent material (210) configured in a light-receiving relationship with the light generating device (100) and configured to convert at least part of the polarized laser radiation (101) into luminescent material radiation (211); (III) the light generating system (1000) is configured to generate in an operational mode system light (1001) at least comprising the luminescent material radiation (211); (IV) the optics (400) comprise first optics (410) and second optics (420); wherein the first optics (410) are configured to change the polarization of the polarized laser radiation (101), and wherein the second optics (420) have one or more of (i) a polarization dependent transmission and (ii) a polariza

Abstract: A light emitting device (1) comprising at least one LED light source (6, 61, 62) adapted for, in operation, emitting light source light, and an elongated light guide (2) comprising a height direction (H), a width direction (W), a depth direction (D), a longitudinal axis (L) extending in the height direction (H), a first major surface (31) and a second major surface (32) arranged extending opposite to the first major surface in the depth direction (D), a first minor surface (41) and a second minor surface (42) arranged extending opposite to the first minor surface in the width direction (W), and a first end (51) and a second end (52) arranged extending opposite to the first end in the height direction (H), where the elongated light guide (2) further comprises at least one light in-coupling element (7, 71, 72) configured to couple the light source light into the elongated light guide and at least one light out-coupling element (81, 82) configured to couple the light source light out of the elongated light guide

Abstract: The invention provides a method comprising producing a 3D item (1) by means of fused deposition modelling using a fused deposition modeling 3D printer (500), the method comprising a 3D printing stage comprising layer-wise depositing core-shell-shell material (1201) via a printer nozzle (502) on a receiver item (550), wherein the core-shell- shell material (1201) comprises a hollow tube (1210) comprising a hollow core (1220) and a first shell (1230) enclosing the hollow core (1220), and 3D printable material (201) at least partly enclosing the first shell (1230), to provide the 3D item (1) comprising a core-shell- shell layer (1322), wherein the core-shell-shell layer (1322) comprises the hollow tube (1210) comprising the hollow core (1220) and the first shell (1230) enclosing the hollow core (1220), and 3D printed material (202) at least partly enclosing the first shell (1230).

Abstract: A light emitting diode, LED, filament comprising a core portion having an elongated carrier, comprising a first major surface and a second major surface, a plurality of LEDs arranged on at least one of the first and second major surfaces of the elongated carrier, a light transmissive encapsulant, encapsulating the plurality of LEDs, and at least partially encapsulating the elongated carrier, and configured to transmit a first light with a first angular distribution, the filament further comprising a plurality of light transmissive light guiding structures arranged on discreet portions of an outer surface of the encapsulant, along a length, L, of the core portion, and arranged to in-couple a portion of the first light, and out-couple a second light, with a second angular distribution, such that the first and second angular distributions are not equal.

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 diode, LED, filament arrangement (100) is provided. The LED filament arrangement comprises a LED filament (120) comprising an array of a plurality of light emitting diodes (140), LEDs, arranged on an elongated substrate (70). The LED filament comprises a first subset (S1) of at least two LEDs, and a second subset (S2) of at least two LEDs, wherein the first subset (S1) of LEDs is different from the second subset (S2) of LEDs. The LEDs of the first subset (S1) are coupled in series and the LEDs of the second subset (S2) are coupled in parallel, such that the luminous flux of the individual LEDs of the first subset (S1) differs from the luminous flux of the individual LEDs of the second subset (S2) during operation of the LED filament arrangement.

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 (125), LEDs, wherein the at least one LED filament comprises a first portion (130) having a first shape, wherein the first portion is configured to emit light of a first spectral distribution, S1, in a first spatial direction, D1, and a second portion (140) having a second shape, different from the first shape, and the second portion is configured to emit light of a second spectral distribution, S2, in a second spatial direction, D2, wherein the first spectral distribution, S1, is different from the second spectral distribution, S2, and the first spatial direction, D1, is different from the second spatial direction, D2.