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 invention provides a method wherein single layers of a wall element, consist of two (or more) strands. One of the strands is located at one side of the layer and another one of the strands is arranged at the other side of the layer. However, at one or more positions these sides may be changed. In this way, e.g. color, reflectivity, transmissivity, and or other optical properties may be controlled. Further, a strong(er) layer may be obtained. Printing becomes more flexible, as the two strands may essentially be printed continuously. There will thus be change positions within the layer where one strand is over the other, or vice versa. In order not to increase layer thickness (at those change positions), as all strands are within the same layer, at the change positions the layer thickness of the strands may be decreased. In specific embodiments, there may be a temporary stop during printing of one of the strands at the change position to provide space for the future strand.

Abstract: The present disclosure relates to a LED filament system (100) comprising a LED filament arrangement (105) and a controller (120). The LED filament arrangement comprises a plurality of LED filaments (110a-c). The LED filaments are interwound around a common central axis (A) such that each LED filament has a spiral-shape. In the LED filament arrangement, two neighboring LED filaments differ by a translation pitch (t) along the central axis. The controller is configured to control power supply to the LED filaments such that at least one of the plurality of LED filaments is individually controllable. The controller is further configured to control the power supply to the LED filaments in a first mode, in which all of the LED filaments are in an on-state and the controller provides power supply above a first power level to the LED filaments. The controller is further configured to control the power supply to the LED filaments in a second mode in which at least one of the LED filaments is in an off-state.

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 invention provides a printer head (501) for a 3D printer, the printer head (501) comprising n distribution elements (510), wherein n?2, a combination chamber (520), and a printer nozzle (502), wherein the combination chamber (520) is configured downstream of the distribution elements (510) and upstream of the printer nozzle (502), wherein each distribution element (510) comprise a flow-through chamber (511) with an inlet (512) and a plurality of k outlets (513) to the combination chamber (520), wherein k?4, wherein the outlets (513) of the distribution elements (510) are configured such that a plurality of outlets (513) of a distribution element (510) have outlets (513) of another distribution element (510) as nearest neighbors.

Abstract: A beam shaping device (1; 31) comprising first (3; 33) and second (4; 37) optically transparent substrates, a liquid crystal layer (2; 36) sandwiched there between, and first (5; 34) and second (6; 35) electrodes arranged on a side of the liquid crystal layer (2; 36) facing the first substrate (3; 34). The beam shaping device (1; 31) is controllable between beam-shaping states, each permitting passage of light through the beam-shaping device in a direction perpendicular thereto. The beam shaping device (1; 31) is configured in such a way that application of a voltage (V) across the first (5; 34) and second (6; 35) electrodes results in an electric field having a portion essentially parallel to the liquid crystal layer (2; 36) in a segment thereof between neighboring portions of the electrodes (5, 6; 34; 35) and extending substantially from the first substrate (3; 34) to the second (4; 35) substrate.

Abstract: The invention provides an arrangement (1) comprising a device (1000), wherein the device (1000) comprises a luminescent material comprising element (100) and a light transmissive element (200), wherein: (a) the device (1000) has a first device axis (A1); (b) the luminescent material comprising element (100) comprises a luminescent material (110) configured to emit luminescent material light (111) upon irradiation with first light (11), wherein the luminescent material comprising element (100) has a first length (L1) and a characteristic first dimension (D1) perpendicular to the first length (L1), wherein D1/L1<1; wherein the luminescent material comprising element (100) is configured at a non-zero first distance (r1) from the first device axis (A1), and wherein the luminescent material comprising element (100) at least partly surrounds the first device axis (A1); (c) the light transmissive element (200) is transmissive for the first light (11), wherein the light transmissive element (200) comprises a eleme

Abstract: A light emitting device (3) comprising an array of light emitting diodes (LEDs) (301-317), said array of LEDs comprising a plurality of LEDs (61-69), a center (31), an perimeter (32) and a first axis (X) extending through the center and transverse to the outer circumferential edge, where each LED of the array of LEDs comprises a size and a shape, where the plurality of LEDs is arranged on a plurality of lines (L) extending in a direction 5 from a point on the first axis (X) towards the outer circumferential edge (32), two or more LEDs of the plurality of LEDs being arranged on each line, and where the two or more LEDs on each line are arranged such that at least one gradient in the size of the LEDs and/or the shape of the LEDs is provided in a direction along said line.

Abstract: A printer head (100) for a 3D-printing apparatus, comprising a nozzle (110) arranged to extrude a printing material along a principal axis (A) of the nozzle. The nozzle comprises an opening (120) having a first area (130) for allowing a flow of printing material there through, and an element (140) arranged centrally with respect to the opening in a plane perpendicular to the principal axis of the nozzle. The element has a cross-sectional second area (150) parallel to the first area, wherein the second area, in a projection on the first area in a direction along the principal axis, is defined by the first area, such that the nozzle, during operation of the printer head, allows a flow of printing material through the opening and around the element.

Abstract: The invention provides a method for producing a 3D item (1) by means of fused deposition modelling, the method comprising a 3D printing stage comprising layer-wise depositing an extrudate (321) from 3D printable material (201), to provide the 3D item (1) comprising 3D printed material (202), wherein the 3D item (1) comprises a plurality of layers (322) of 3D printed material (202), wherein each layer (322) has a layer height (H) and a layer width (W), wherein the 3D printing stage comprises generating a stack (1322) of the layers (322) of the 3D printed material (202), wherein at a fixed first x,y-position the layer height (H) is varied layer by layer for a subset of a total number of layers (322), wherein either (i) the layer height (H) increases for consecutive layers (322) and then the layer height (H) decreases for consecutive layers (322), or (ii) the layer height (H) decreases for consecutive layers and then the layer height (H) increases for consecutive layers (322); and wherein at least part of the 3D

Abstract: A light emitting device configured to emit light with a total color temperature (CTtot), said light emitting device comprising at least one first light emitting diode (LED) filament, and at least one second LED filament, wherein each of the at least one first LED filament and the at least one second LED filament comprises an elongated carrier, and an array of light emitting diodes mounted on said substrate; and a controller for individually controlling said at least first LED filament and said at least one second LED filament, wherein said at least one first LED filament is arranged to emit light of a first color temperature (CT1), said first color temperature being controllable in a first color temperature range, from CT1low to CT1high, wherein said at least one second LED filament is arranged to emit light of a second color temperature (CT2), said second color temperature being controllable in a second color temperature range, from CT2low to CT2high, and wherein said controller is configured to control said

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 k 1 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

Abstract: A light emitting diode, LED, filament arrangement (100) is provided. The LED filament arrangement comprises at least one LED filament (120) which in turn comprises an array of a plurality of light emitting diodes (140), LEDs. The at least one LED filament extends along an axis, A. The LED filament arrangement further comprises at least one reflector element (200) which is configured to at least partially reflect the light emitted from the at least one LED filament during operation. The at least one reflector element has a spiral shape and is arranged at least partially around the at least one LED filament such that the at least one reflector element extends along the axis, A.

Abstract: The invention provides a lighting device (1) comprising: —one or more light sources (10) configured to provide light source light (11); —a luminescent element (5) comprising an elongated luminescent body (100) having a radiation input face (111) for receipt of the light source light (11), the luminescent element (5) comprising a first luminescent material (120) for conversion of at least part of the light source light (11) into luminescent material light (8); —a light guide element (850), configured downstream of the first luminescent material (120), and configured to light guide at least part of the first luminescent material light (8); —a second luminescent material (1120), configured downstream of the first 10 luminescent material (120), at a first distance (d1) of at least 0.

Abstract: The invention provides a method for producing a 3D item (1) by means of fused deposition modelling, the method comprising a 3D printing stage comprising: layer-wise depositing an extrudate (321) comprising 3D printable material (201), to provide the 3D item (1) comprising 3D printed material (202), wherein the 3D item (1) comprises a plurality of layers (322) of 3D printed material (202), wherein the 3D printable material (201) comprises core-shell 3D printable material (201) comprising (i) a core (221) comprising core material (240) and (ii) a shell (222) comprising shell material (250), wherein the core material (240) comprises a core thermoplastic material (241) and core additive material (242), wherein the shell material (250) comprises a shell thermoplastic material (251) and shell particles (252), wherein the shell material (250) is light transmissive for one or more wavelengths in the visible wavelength range, wherein the shell particles (252) comprise specularly reflective particles, wherein the core

Abstract: The invention provides a method for producing a 3D item (1) by means of fused deposition modelling, the method comprising a 3D printing stage comprising layer- wise depositing an extrudate (321) comprising 3D printable material (201), to provide the 3D item (1) comprising 3D printed material (202), wherein the 3D item (1) comprises layers (322) of 3D printed material (202), wherein the method further comprises controlling a first temperature T1 of the 3D printable material (201) within a first temperature range, wherein the 3D printable material (201) comprises a thermoplastic host material (401) and a dopant material (410) in the range of 1-20 vol %, the dopant material (410) comprising polymeric flake-like particles having a metal coating, wherein the 3D printable material (201) has an optical property that irreversibly changes from a low-temperature optical property to a high-temperature optical property when increasing a temperature of the 3D printable material (201) over a change temperature Tc, the opti

Abstract: The present disclosure relates to a light-emitting diode, LED, filament system (770) comprising a LED filament (100) and a controller (771). The LED filament comprises a carrier (120) arranged in the shape of a spiral formed by successive loops (250). The LED filament further comprises a plurality of LEDs (110) arranged in a linear array on one side of the carrier. The LEDs are arranged along the carrier in sections (140a-f), each section having a position along the spiral-shaped carrier. The controller is configured to control a power supply to a section, or to a group of sections, of the LED filament. The controller is adapted to control a section based on its position, or a group of sections based on the positions of the sections of said group.

Abstract: A light emitting device (1) comprising at least one LED filament (2) adapted for, in operation, emitting LED filament light, the at least one LED filament comprising a carrier (6) and a plurality of LEDs (5) arranged on the carrier and adapted for, in operation, emitting LED light, and a heat sink element (3), the at least one LED filament (2) being arranged extending spiraling around a vertical center axis LA of the light emitting device, wherein the heat sink element (3) further is arranged extending spiraling around the vertical center axis of the light emitting device, and wherein the heat sink element (3) is arranged extending from the at least one LED filament towards the vertical center axis of the light emitting device.

Abstract: The one or more LED filaments (110) are arranged to form an inner space. At least one of the one or more LED filaments (110) is arranged as a LiFi transmitter. The LiFi device (100) further comprises a light sensor (120) arranged within the inner space. The light sensor (120) is arranged as a LiFi receiver. The LiFi device further comprises an envelope arranged to envelope the one or more LED filaments (110) and the light sensor (120). The one or more LED filaments (110) are further arranged such that the LED filament light is directed towards the envelope.

Abstract: There is provided a light emitting diode, LED, filament lamp (100) which provides LED filament lamp light (100?). The LED filament comprises a first linear array of LEDs (101) and a second linear array of LEDs (106), and a carrier (103). The first linear array of LEDs (101) are arranged on a first surface (102) of the carrier (103) and includes only first LEDs (104) which are configured to emit first white light (105). The second linear array of LEDs (106) are arranged on a second surface (107) of the carrier (103), opposite to said first surface (102), and includes only second LEDs (108) which are configured to emit color controllable light (109). The LED filament light (100?) comprises the first white light (105) and/or the color controllable light (109).