Abstract: A light emitting diode, LED, filament arrangement (100) comprising at least one LED filament (120) comprising a plurality of light emitting diodes, LEDs, (140). The LED filament arrangement further comprises a plurality of first sections (180) and a plurality of second sections (200), wherein the plurality of first sections (180) is configured to emit light of a first colour temperature, CT1, and with a first intensity, I1, during operation, and the plurality of second sections (200) is configured to emit light of a second colour temperature, CT2, and with a second intensity, 12, during operation, wherein at least one of CT1?CT2 and I1?I2 is fulfilled, and wherein at least two second sections of the plurality of second sections are adjacently arranged and arranged at least partially parallel to each other.

Abstract: A light emitting diode, LED, filament arrangement (100, 400, 510), comprising an elongated LED filament (150) comprising an array of a plurality of light emitting diodes (110, 410), LEDs, and a carrier (240) arranged to support the plurality of LEDs. The LED filament arrangement further comprises a heat sink (250), wherein the LED filament is arranged upon the heat sink. The LED filament comprises a center axis, A, and elongates in a meandering shape in a first plane, P, wherein at least one of the LED filament and the heat sink is convex-shaped with respect to the center axis, A, along at least a first segment (120, 320) of the LED filament, and at least one of the LED filament and the heat sink is concave-shaped with respect to the center axis, A, along at least a second segment (130, 330) of the LED filament.

Abstract: A light emitting diode, LED, filament lamp (100), comprising at least one LED filament (120, 120a, 120b) having abase portion (210) and a top portion (22) extending over a length, L, along a longitudinal axis, A, wherein the LED filament comprises an array of a plurality of light emitting diodes, LEDs, (140) extending along the longitudinal axis A. An encapsulant (145) at least partially enclosing the plurality of LEDs, wherein the encapsulant comprises a luminescent material (150).

Abstract: The present invention relates to an LED filament lamp (10) comprising a two-dimensional flexible printed circuit board (100), PCB, having a first and a second opposing connection end portions (110, 120). The two-dimensional flexible PCB (100) comprises a plurality of filaments lines (130a-d) extending from the first connection end portion (110) to the second connection end portion (120), wherein each filament line (130a) comprises an array of LEDs (130a1-130aN). The two-dimensional flexible PCB (100) is arranged in a cylinder shape by connecting the first and the second opposing connection end portions (110, 120) such that each (130a) of the plurality of filament lines (130a-d) is connected to another (130b) one of the plurality of filament lines (130a-d) thereby a spiral LED filament (150) is formed by the plurality of filament lines (130a-d).

Abstract: The invention provides a radiation generating system comprising a radiation unit, wherein the radiation unit comprises a light source, a first collimator, and an optical arrangement, wherein: (a) the light source is configured to generate light source radiation having a first spectral power distribution having an intensity I1,1 at a first wavelength ?1 and an intensity I1,2 at a second wavelength ?2; (b) the first collimator is configured in a light receiving relationship with the light source, wherein the first collimator is configured to collimate the light source radiation into collimated light source radiation; (c) the optical arrangement is configured downstream of the first collimator and is configured to convert the collimated light source radiation into arrangement radiation; wherein the arrangement radiation is collimated relative to the collimated light source radiation; wherein the optical arrangement comprises a second collimator and an optical filter, wherein: (i) the second collimator is configu

Abstract: A controller (110) for a lighting system (100) is provided. The controller is connectable to a plurality of light sources (120, 122) of different colors and/or different color temperatures, and to a user control element (130) configured to generate a user selected value from a range of user selectable values. The controller is configured to receive a change of the user selected value, and as a response to and corresponding to this change adjust a combined output of the plurality of light sources to produce a change in output color, color temperature and/or luminous flux of a combined light of the plurality of light sources. The change is such that, as function of the user selected value in separate first intervals of the user selectable values, the output color and/or color temperature is kept approximately constant while the luminous flux obtains a local minimum or local maximum in each first interval.

Abstract: The invention provides a light generating device (1000) comprising (i) a plurality of n light sources (100), and (ii) an optical component (1200) comprising an array (200) of prismatic elements (300), wherein: (a) the plurality of n light sources (100) comprise a first subset of one or more first light sources (110) configured to generate collimated first light source light (111) and a second subset of one or more second light sources (120) configured to generate collimated second light source light (121), wherein n>2; (b) the array (200) of prismatic elements (300) is configured in a light receiving relationship with the n light sources (100), wherein the array of prismatic elements (300) comprises k1 parallel arranged first prismatic faces (201) and k2 parallel arranged second prismatic faces (202), wherein k1>2 and wherein k2>2, wherein the first prismatic faces (201) and the second prismatic faces (202) are not mutually parallel; (c) the first light sources (110) are configured to irradiate the f

Abstract: A light-emitting module (100) is disclosed, the light-emitting module comprising a first light-emitting diode, LED, array (104) arranged on a substrate (102). The first LED array has a first perimeter (106) and comprises a plurality of first LEDs (108) configured to emit first light. The light-emitting module further comprises a second LED array (110) arranged on the substrate. The second LED array has a second perimeter (112), smaller than the first perimeter and comprises a plurality of second LEDs (114) configured to emit second light. The second LED array is arranged off-center within the first LED array. Further, the light-emitting module comprises a controller (116) configured to individually control the first LED array and the second LED array.

Abstract: The invention provides a light generating system (1000), comprising (i) one or more pump light sources (100), (ii) a first luminescent material (210), (iii) a second luminescent material (220), and (iv) optics (400), wherein: (A) the one or more pump light sources (100) are configured to generate pump light source light (101); (B) the first luminescent material (210) is configured to convert at least part of the pump light source light (101) into first luminescent material light (211) having a first spectral power distribution; the second luminescent material (220) is configured to convert at least part of the pump light source light (101) into second luminescent material light (221) having a second spectral power distribution, different from the first spectral power distribution; and wherein the spectral power distribution of one of the first luminescent material light (211) and the second luminescent material light (221) overlaps with 5-50% of the spectral power distribution of the other; (C) the optics (40

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 lighting device (1000) comprising (i) a light source (100) configured to generate light source light (101), wherein the light source (100) comprises a solid state light source, and (ii) a support (200) configured to support the light source (100), wherein the support (200) comprises a metal based thermally conductive material (201), wherein the lighting device (1000) further comprises (iii) a layered element (300), configured in physical contact with the support (200), wherein the layered element (300) comprises one or more layers (310), wherein the layered element (300) at least comprises an electrically insulating first layer (311), wherein at least part of the layered element (300) is configured between the light source (100) and the support (200) such that during operation part of the light source light (101) irradiates the layered element (300), wherein the layered element (300) comprises light reflective particles (410), wherein at least 50 wt.

Abstract: The present invention relates to a lighting device (10), comprising: a plurality of first light sources (24) adapted to emit visible light (24); a light guide panel (12), wherein visible light emitted by the plurality of first light sources in operation is coupled into the light guide panel via a light incoupling part (16a); at least one second light source (28) adapted to emit at least one of UV light (28?) and violet light to be coupled into the light guide panel via a light incoupling part (16a; 16b); and an optical element (30; 30?; 30?; 42) made of a first material which is different and more UV resistant than a second material that the light guide panel is made of, wherein the optical element is adapted to distribute light emitted by the at least one second light source over an area (34; 46) which is larger than a total light output surface area (35) of the at least one second light source before the light is coupled into the light guide plate.

Abstract: The present invention describes a LED light unit (1) for providing LED light, the LED light unit (1) comprising a flexible printed circuit board (PCB) (2) having a first longitudinal axis (LA1) and a plurality of elongated light sources (3) each having a second longitudinal axis (LA2). The plurality of elongated light sources (3) is arranged on the flexible PCB (2) such that none of the second longitudinal axes (LA2) of the plurality of elongated light sources (3) is parallel to the first longitudinal axis (LA1) of the flexible PCB (2). The LED light unit further comprises a carrier (4), wherein the flexible PCB (2) is bent along the first longitudinal axis (LA1) such that each of the elongated light sources (3) is arranged in the shape of a substantially circular arc, and wherein the flexible PCB (2) is subsequently at least partially attached to the carrier (4).

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 for producing a 3D item by depositing 3D printable material, wherein the 3D printable material comprises core material and 3D printable shell material. The core material is one or more of (i) reflective, (ii) transmissive, (iii) absorbing, and (iv) luminescent for light having a wavelength in the visible wavelength range. The 3D printable shell material is transmissive for the wavelength in the visible wavelength range. A printed core-shell layer has a layer width (W) and a layer height and a first aspect ratio AR1, wherein AR1=W/H and wherein AR1>1. A cross-sectional plane of the core-shell layer comprises the layer width (W) and the layer height, and the core (330) provides a core cross-section having a first dimension (A1), which is the longest dimension of the core cross-section, and a second dimension (A2) perpendicular to the first dimension (A1), providing a second aspect ratio AR2, wherein AR2=A1/A2, wherein 2=<AR2=<10,000; and wherein AR2/AR1>=1.

Abstract: The invention provides a light generating system (1000) comprising one or more light generating devices (100), a first luminescent material element (1210), a second luminescent material element (1220), first polarization optics (410), second polarization optics (420), and third optics (430), wherein: (a) the one or more light generating devices (100) are configured to generate device light (101); (b) the first luminescent material element (1210) comprises a first luminescent material (210) configured in a light receiving relationship with one or more of the one or more light generating devices (100) and configured to convert at least part of the received device light (101) into first luminescent material light (211); (c) the second luminescent material element (1220) comprises a second luminescent material (220) configured in a light receiving relationship with one or more of the one or more light generating devices (100) and configured to convert at least part of the received device light (101) into second l

Abstract: A light emitting diode, LED, filament (100, 200, 420, 430, 510), comprising an array of a plurality of light emitting diodes (110, 250, 260, 270,410, 415), LEDs, wherein the LED filament comprises a center axis, A, and elongates in a meandering shape in a plane, P, is provided. At least a first segment (120, 220) of the LED filament, which elongates along the center axis, A, has first width, W1, and is configured to emit light with a first intensity, I1, and a first color temperature, CT1. At least a second segment (130, 230) of the LED filament, which elongates along the center axis, A, has second width, W2, and is configured to emit light with a second intensity, I2, and a second color temperature, CT2. For the at least one first segment and the at least one second segment, at least one of I1?I2, CT1?CT2, and W1?W2 is fulfilled.

Abstract: The present disclosure relates to a light emitting diode (LED) filament arrangement (100) which comprises an elongated, flexible LED filament (110) having a plurality of LEDs arranged along the elongation of the filament. The arrangement further comprises a bending unit (120) having a body in which a channel (121) is formed. A portion of the LED filament is arranged within the channel of the bending unit, and the bending unit is at least partially curved and adapted to induce a bend in the LED filament.

Abstract: A light emitting diode, LED, filament arrangement (100) comprising at least one LED filament (120) comprising a plurality of light emitting diodes, LEDs, (140). The LED filament arrangement further comprises a plurality of first sections (180) and a plurality of second sections (200), wherein the plurality of first sections (180) is configured to emit light of a first colour temperature, CT1, and with a first intensity, I1, during operation, and the plurality of second sections (200) is configured to emit light of a second colour temperature, CT2, and with a second intensity, I2, during operation, wherein at least one of CT1?CT2 and I1?I2 is fulfilled, and wherein at least two second sections of the plurality of second sections are adjacently arranged and arranged at least partially parallel to each other.

Abstract: The invention provides a light generating device (1000) comprising an LED filament (100), wherein the LED filament (100) comprises a support (105), a set (107) of solid state light sources (110), and an encapsulant (160), wherein: (I) the LED filament (100) has a length axis (108) having a first length (L1); (II) the solid state light sources (110) are arranged over the first length (L1) of the LED filament (100) on the support (105), wherein the solid state light sources (110) are configured to generate light source light (111); (III) the encapsulant (160) encloses at least part of each of the solid state light sources (110) of the set (107) of solid state light sources (110), wherein the encapsulant (160) comprises a luminescent material (200) configured to convert at least part of the light source light (111) into luminescent material light (201); (IV) the light generating device (1000) is configured to generate device light (1001) comprising one or more of (i) the light source light (111) and (ii) the lum