LIGHTING DEVICE, LIGHTING DEVICE ELEMENT, AND PROCESSES FOR THE PRODUCTION THEREOF

Abstract

The invention provides a lighting device element (100) comprising (i) at least one shaped element (120) selected from the group consisting of a pipe-like shaped element (120,119) and a rod-like shaped element (120,129), (ii) one or more functional elements (180) selected from the group consisting of a light source (10), electronics (20) for a light source (10), a heat sink (1401) and optics (30) for a light source (10), and (iii) a support (140) for the one or more functional element (180), wherein the lighting device element comprises at least said optics as functional element, wherein the lighting device element (100) comprises at least two monolithic bodies (170), each monolithic body (170) comprising at least part of the support (140) and at least part of the optics (30), with said at least two monolithic bodies (170) providing thereby said support (140) and said optics (30), wherein (a1) at least part of the support (140) and (a2) at least part of the one or more functional elements (180) are accommodated within and/or around the shaped element (120); wherein the support (140) and the one or more functional elements (180) are coupled; wherein (b1) the support (140) comprises at least part of a fastening material (145) and/or (b2) a support assist (160), at least partly configured within and/or around the shaped element (120), comprises at least part of the fastening material (145) and the support assist (160) comprises a receptor opening (169) hosting at least part of the support (140); wherein adjacent to a shaped element wall (121) of the shaped element (120) the fastening material (145) comprises (c1) an indentation (147) and (c2) part of the fastening material (145) is in pressed physical contact with said shaped element wall (121) and/or protruding into said shaped element wall (121) via which the support (140) is locally fixed to the shaped element (120).

Claims

1. A lighting device element comprising (i) at least one shaped element selected from the group consisting of a pipe-like shaped element and a rod-like shaped element, (ii) one or more functional elements selected from the group consisting of a light source, electronics for a light source, a heat sink and optics for a light source, and (iii) a support for the one or more functional elements, wherein the lighting device element comprises at least said optics as functional element, wherein the lighting device element comprises at least two monolithic bodies, each monolithic body comprising at least part of the support and at least part of the optics, with said at least two monolithic bodies providing thereby said support and said optics, wherein (a1) at least part of the support and (a2) at least part of the one or more functional elements are accommodated within and/or around the shaped element; wherein the support and the one or more functional elements are coupled; wherein (b1) the support comprises at least part of a fastening material and/or (b2) a support assist, at least partly configured within and/or around the shaped element, comprises at least part of the fastening material and the support assist comprises a receptor opening hosting at least part of the support; wherein adjacent to a shaped element wall of the shaped element the fastening material comprises (c1) an indentation and (c2) part of the fastening material is in pressed physical contact with said shaped element wall and/or protruding into said shaped element wall via which the support is locally fixed to the shaped element, wherein at least one of the monolithic bodies is in contact with another of the monolithic bodies and in assembled position the optics is formed by the at least two monolithic bodies.

2. The lighting device element according to claim 1, wherein the at least two monolithic bodies both have a form-factor such that in assembled a form-fitting cavity is formed for accommodating and fixing at least one functional element.

3. The lighting device element according to claim 1, wherein the at least two monolithic bodies have identical shapes.

4. The lighting device element according to claim 1, wherein the lighting device element further comprises a connecting element, wherein the connecting element physically connect the monolithic bodies.

5. The lighting device element according to claim 1, wherein the at least two monolithic bodies comprise a magnesium alloy.

6. The lighting device element according to claim 1, wherein the at least two monolithic bodies comprise a thixomolded monolithic body.

7. The lighting device element according to claim 1, wherein the optics comprises a reflector.

8. The lighting device element according to claim 1, wherein the optics comprise a thickness selected in the range of 0.1 mm-5 mm.

9. The lighting device element according to claim 1. wherein the lighting device element at least comprises said light source.

10. The lighting device element according to claim 1, wherein the shaped element is selected from the group consisting of a pipe-like shaped element having an inner diameter and an outer diameter and a rod-like shaped element having a rod outer diameter, and wherein at least locally the inner diameter and/or outer diameter is essentially invariable.

11. The lighting device element according to claim 1, wherein part of the fastening material is in pressed physical contact with the shaped element wall of the shaped element and/or protruding into said shaped element wall via continuous or via line/point protrusions extending over at least half of the circumference of said wall.

12. A lighting device comprising the lighting device element according to claim 1, the lighting device comprising the shaped element, the light source, electronics for the light source, optics for the light source, and the support and optionally a heat sink and one or more other elements, wherein the light source, the electronics for the light source, the support, the optics for the light source, the optional heat sink and the optional one or more other elements, are coupled to the lighting device.

13. A process for the production of a lighting device element, the lighting device element comprising (i) at least one shaped element selected from the group consisting of a pipe-like shaped element and a rod-like shaped element and (ii) one or more functional elements selected from the group consisting of a light source, electronics for a light source, a heat sink, and optics for a light source, and (iii) a support for the one or more functional elements, wherein the lighting device element comprises at least said optics as functional element, wherein the lighting device element comprises at least two monolithic bodies, each monolithic body comprising at least part of the support and at least part of the optics, with said at least two monolithic bodies providing thereby said support and said optics, the process comprising an arranging stage, the arranging stage comprising: arranging in and/or around the shaped element (a1) at least part of the support of said at least two monolithic bodies fastening the support to at least part of the shaped element by pressing with a pressing element a fastening material against and/or into a shaped element wall of the shaped element; and coupling one or more optional functional elements other than the optics and the support; wherein (b1) the support comprises at least part of the fastening material and/or (b2) a support assist, at least partly configured within or around the shaped element, comprises at least part of the fastening material and the support assist comprises a receptor opening configured to receive at least part of the support, wherein the process further comprises (i) associating the one or more functional elements other than the optics with at least one of said monolithic bodies, and (ii) physically coupling the at least two monolithic bodies, wherein the shaped element comprises a pipe-like shaped element the process further comprising roughening at least part of the shaped wall element wall before pressing with a pressing element the fastening material against and/or into the shaped element wall.

14. The process according to claim 13, wherein the shaped element is selected from the group consisting of a pipe-like shaped element having an inner diameter and an outer diameter and a rod-like shaped element having a rod outer diameter, and wherein the arranging stage comprises: arranging in and/or around the shaped element where at least locally said inner diameter and/or said outer diameter is essentially invariable (a1) at least part of a support of said at least two monolithic bodies, fastening the support to the at least part of the shaped element by pressing with a pressing element a fastening material against and/or into a shaped element wall of the shaped element; and coupling one or more optional functional elements other than the optics and the support.

15. A process for the production of a lighting device, the lighting device comprising a lighting device element comprising at least one shaped element selected from the group consisting of a pipe-like shaped element and a rod-like shaped element, and a light source, the lighting device further comprising electronics for the light source, and optics for the light source, wherein the process comprises assembling the shaped element, the light source, the electronics, the optics, and optionally a heat sink and one or more other elements, to the lighting device while assembling the lighting device element according to the process according to claim 13.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0123] Embodiments of the invention will now be described, by way of example only, with reference to the accompanying schematic drawings in which corresponding reference symbols indicate corresponding parts, and in which:

[0124] FIGS. 1A-1B schematically depict some aspects and embodiments of the lighting device element;

[0125] FIG. 2 schematically depicts some further aspects and embodiments of the lighting device element;

[0126] FIGS. 3A-3B schematically depict some aspects of the process described herein;

[0127] FIG. 4 schematically depicts some aspects of the light source device element;

[0128] FIG. 5 schematically depicts some aspects of an embodiment of the process for the production of a lighting device element;

[0129] FIG. 6 schematically depicts some aspects and embodiments of the invention; and

[0130] FIG. 7 schematically depicts an embodiment of the lighting device;

[0131] FIG. 8 shows a picture photograph of an embodiment showing the support protruded in the pipe-like shaped element;

[0132] FIG. 9 schematically depicts some further aspects of an embodiment of the lighting device element;

[0133] FIG. 10 schematically depicts some further aspects of an embodiment of the lighting device element;

[0134] FIGS. 11A-D schematically depict some further aspects of further embodiments of the lighting device element;

[0135] FIG. 12 schematically depicts some further aspects of an embodiment of the lighting device element, and

[0136] FIG. 13A-B schematically depicts yet some further aspects of an embodiment of the lighting device element.

[0137] The schematic drawings are not necessarily on scale.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0138] FIG. 1A schematically depicts some aspects of an embodiment of (the process for production of) the lighting device element 100 and the lighting device 1000. The lighting device element 100 schematically depicted in FIG. 1A, comprises a pipe-like shaped element 120,119, a support 140 and three functional elements 180, i.e., a light source 10, electronics 20 for the light source 10, and optics 30 for the light source 10. The embodiment also schematically depicts a monolithic body 170 providing the support 140 and the optics 30 (for the light source 10). Embodiments of the invention comprise at least two monolithic bodies 170, each monolithic body 170 comprising at least part of the support 140 and at least part of the optics. Together they provide the combined support and optics body 177.

[0139] Other embodiments may comprise a support 140 not provided by at least two monolithic bodies 170. Such embodiments not necessarily comprise optics 30, see e.g. FIG. 2.

[0140] Especially, the one and more monolithic bodies (together) provide the (entire) support and the (entire) optics 30. Especially, the optics 30, provided by the at least two monolithic bodies 170, is functionally coupled to the support 140. Next to the optics 30 (provided by the monolithic bodies 170), embodiments may comprise further optics 30 (see FIG. 9). Especially, the further optics 30 may not be functionally be coupled to the support 140. Yet, the further optics 30 may in embodiments (also) be functionally coupled to the support 140.

[0141] Assembling may be provided according to the process described herein, wherein in an arranging stage the support 140 (in this embodiments provided by the one and more monolithic bodies 170) for the functional element 180 and the functional elements 180 are arranged in the pipe-like shaped element 120,119. It is noted that while arranging the support 140 at the shaped element 120, also the optics 30 may be arranged in or around the shaped element 120 in embodiments comprising a combined support and optics body 177. Especially the optics 30 does not contact the shaped element wall 121 (during or after arranging the optics 30). The support 140 is fastened into the pipe-like shaped element 120,119 by pressing with a pressing element 205 (see FIG. 5) the fastening material 145 against and/or into a pipe-like shaped element wall 121 of the pipe-like shaped element 120. The pipe-like shaped element 120,119 may have an essentially invariable inner diameter 124, at least at and in the direct vicinity of the fixed support 140. Especially, the support 140 does not abut, rest or press upon a (locally) reduced inner diameter portion of the pipe-like shaped element 120,119. In this embodiment the support 140 comprises at least part of the fastening material 145. In other embodiments a support assist 160 (also) comprises at least part of the fastening material 145. In the embodiment in FIG. 2 (see also further below) the support assist 160 comprises a receptor opening 169 configured to receive (at least part of) the support 140 in the pipe-like shaped element 120,119. The process further provides that the functional element 180 and the support 140 are coupled. Especially, the optics 30 and the support are coupled by the at least two monolithic bodies 170. Also further another functional element 180 may be coupled with the support 140. However it is not required that all functional elements 180 are coupled with the support 140. In embodiments (some) functional elements 180 are not (physically) be coupled with the support 140.

[0142] In FIG. 1B schematically an enlarged section of the fastened support 140 protruded in the pipe-like shape element wall 121 is depicted (see also FIG. 8 below showing a picture of such a section). Especially the indentations 147 provided by the pressing element 205, especially the shapes 206 of the pressing element 205 may be observed in the fastening material 145 at a location adjacent to the pipe-like shaped wall 121. The indentations 147 may be continuous and fully circumferential, but alternatively may be an interrupted plurality of circumferentially, (preferably evenly) arranged indentations 147. The support 140 is protruded into wall 121 over a protrusion distance 123. Especially, the pressing element 205, pressure, and pipe-like shaped element 120,119 (and/or in further embodiments, the rod-like shaped element 120, 129) are selected to prevent pressing of fastening material 145 through the pipe-like shaped element wall 121. Hence the protrusion distance 123 is especially smaller than the thickness 122 of the wall 121 of the pipe-like shaped element 120,119.

[0143] In FIG. 2 aspects of an embodiment of the lighting device element 100 (before pressing) are schematically depicted. This embodiment comprises a support assist 160 provided with a receptor opening 169 for the support 140. The clearance between the support assist 160 and the pipe-liked shaped wall 121 is indicated by dl. In the embodiment, the support 140 comprises the light source 10, especially a solid state lighting device 110, such as an LED. The light source 10 is arranged at the support 140, especially on a metal core PCB 150. Schematically the pressing element 205 comprising one or more shapes 206 are depicted inside the pipe-like shaped element 120,119. The pipe-liked shaped element wall 121 comprises a wall material 1145. The wall material 1145 may especially be a thermally conductive wall material 1145 to provide a heat sink. Especially, the support assist 160 comprises fastening material 145. The shapes 206 of the pressing element 205 are configured to press the fastening material 145 in an outward direction relative to a central axis 207 of the pressing element 205. Hence, by pressing with the pressing elements 205 the fastening material 145 will be pressed against or into the pipe-like shaped element wall 121. Pressing will also fasten the support 140 in the support assist 160.

[0144] The support 140, the support assist 160 and the wall material 1145 (as well as the optics 30 in other embodiments) may comprise thermally conductive material to advance a heat transport from the light source 10 to the surroundings of the lighting device element 100. Especially coefficient of thermal expansion of the wall material 1145 may be selected to be equal to or smaller than the coefficient of thermal expansion of (the material of) the support assist 145 and (of the material) of the support 140. For instance, the coefficient of thermal expansion of the wall material 1145 may be 90%-100% of the coefficient of thermal expansion of the (material of the) support 140 and/or the support assist 160.

[0145] FIGS. 3A and 3B schematically show embodiments of the process for production of the lighting device element 100. In FIG. 3A, a support 140 is pressed, whereas in FIG. 3b the fastening material 145 of a support assist 160 is pressed with a pressing element 205 comprising shapes 206.

[0146] In the embodiment depicted in FIG. 3A the support 140 comprises a central point 141 and a perimeter 142 with a maximum length L1 between the central point 141 and the perimeter 142 of the support 140. In this embodiment the process comprises pressing with the pressing element 205 the fastening material 145 at the periphery of the support 140. More especially at a distance from the central point 141 of at least 90% of the maximum length L1. The clearance between the support 140 and the pipe-liked shaped wall 121 is indicated by d1

[0147] The geometry of the shapes 206, is specifically shaped to push away material 145 from the peripheral of the support 140 (and/or or the support assist 160) towards the pipe-like shaped element wall 121(, especially while not negatively affecting (contacting) the optics 30). For instance a larger slope 209 of the shape 206 may push more material 145 in the intended direction. By pushing the material 145 in the intended direction the diameter of the support 140 and/or the support assist 160 may increase in such a way that the support 140 is connecting in a mechanical (and in embodiments especially a thermal way). Initial measurements show that a thermal good connection is established with only a 5% thermal system resistance, which is considered to be a very good thermal connection. The central part of the support 140 does not require pressure; only a local deformation close to the periphery of the support 140 may be required. Especially the shape of the pressing element 205 is configured to only provide a pressure at the periphery of the support 140. Hence, the center area of the support 140 may not be deformed during pressing. Therefore, interference with the optics 30, the fixation geometry of optionally comprised LED(s) 10 and/or the flatness of a thermal interface to optional electronics 20 for the light source 10, such as a LED module may be prevented. This allows the use of e.g. a hollow (or open in the middle) pressure element 205 that enables a full assembly of a heat-spreader, comprising e.g. more than one monolithic bodies 170 (also providing the optics 30 for the light source 10), a light source 10, electronics 20 for the light source 10 be preassembled on the support 140, and as a full subassembly to be arranged in the pipe-like shaped element 120,119, wherein the (hollow) pressure element 205 only deforms the peripheral edges of the heat-spreader, i.e. the support 140 and/or the support assist 160. This allows a well accessible and optimized (late stage configuration) production process.

[0148] It is further noted that one of the pressure elements 205 further may be configured to hold the support 140 (and/or the combined support and optics 177) before arranging the support 140 in the pipe-like shaped element 120,119. Using such configuration may facilitate positioning the support 140 before pressing at the wall 121. Said pressure element may e.g. comprise holding elements that may be released after pressing the fastening material 145 at the wall 121.

[0149] The deformation area in the peripheral of the support 140 or the support assist 160, can be a continuous line, parted line or in any dotted pattern of local deformations.

[0150] FIG. 3B schematically depicts above described concept, using a support assist 160 and a support 140 instead of only using a support 140. Because FIG. 3B comprises a cross section, in the embodiment depicted in the figure the support assist 160 is schematically depicted by 4 parts indicated by numbers 165 and 166. However, the parts indicated by reference number 165 especially are connected and form a unity 165. The same holds for the two parts 166, they also make up a second part 166 of the support assist 160. Hence, like the support 140, the support assist 160 also comprises a central point 161 and a perimeter 162 having a maximum length L2 between the central point 161 and the perimeter 162. In this embodiment the process comprises pressing with the pressing element 205 the fastening material 145 that is configured at the periphery of the support assist 160. More especially at a distance from the central point 161 of at least 90% of the maximum length L2.

[0151] Again, in both embodiments, the shapes 206 of the pressing element 205 are configured to press the fastening material 145 in an outward direction relative to a central axis 207 of the pressing element 205. Again, in both embodiments, the support 140 is provided by at least two monolithic bodies 170. Likewise the optics 30 is provided by the at least two monolithic bodies 170. Especially, the embodiments comprise a combined support and optics body 177.

[0152] FIG. 4 schematically depicts a top view of a support 140 arranged in a pipe like-shape element 120,119, having wall 121 with thickness 122, before pressing and may be comparable to the embodiment depicted in FIG. 3A (without the press element 205), however not comprising the optics 30 (or the combined support and optics body 177). The support 140 comprises elongated through holes 144 that may allow an enhanced heat transport (especially by convection) through the lighting device element 100 (after assembling). Further, the central point 141 of the support 140, the perimeter 142 of the support 140 and the maximum length L1 between the central point 141 and the perimeter 142 are depicted. Through holes 144 may also be used for configuration of electrical wiring.

[0153] FIG. 4 schematically depicts an embodiment wherein the internal shape has a circular cross-section and the outer shape has a circular cross-section. Note however that these may differ. For instance, the internal cross-section may be circular, as schematically depicted in FIG. 4, but the external cross-section may be square or may have any other kind of shape.

[0154] For clarity reasons, FIG. 5 very schematically depicts the concepts of an embodiment of the process for producing a lighting device element 100, especially focusing on the pressing; elements not depicted in this figure are depicted in the other figures. In stage I, a pipe-like shaped element 120,119 is selected from a set of one or more pipe-like shaped elements 1200 having a predetermined length L3, and the length L3 is reduced to a desired length preceding the arranging stage. Here, by way of example the pipe-like shaped element has a circular internal and external cross-section; the pipe-like shaped element is here a tube or tubular shaped element. In stage II, a pressing element 205 is arranged in the pipe-like shaped element 120,119 and a support 140, is arranged in the pipe-like shaped element 120,119 (stage III). In the depicted embodiment, the support 140 (already comprises optics 30. This support 140 is provided by the at least two monolithic bodies 170. In this embodiment, the combined support and optics 177 comprises the support 140. In other embodiments, (only) a support 140, not comprising functional elements 180 yet is arranged in the pipe-like shaped element 120,199. Next (stage IV), the support 140, especially the fastening material 145, of the support 140 is pressed using a pressing system 200, and successively in stage IV the support 140 is fastened in the pipe-like shaped element 120,119. Optionally, a surface of the shaped element wall 121 roughened before stage I, e.g. by means of knurling. After removal of the pressure elements 205, (further) functional elements 180, such as a light source 10 and/or electronics 20 for a light source 10 and/or (further) optics for a light source 10 may be arranged in the pipe-like shaped element 120,119. Optionally, the support 140 already may comprise the light source 10 or other functional elements 180. After arranging the support 140 and the (further) functional elements 180 in the pipe-like shaped element 120,119, the functional element(s) 180 and the support 140 are coupled, providing the lighting device element 100 (not shown in the figure). It is further noted that the support 140 (and the optics 30 for the light source light 10) is provided by at least two monolithic bodies 170 (see also FIG. 12), and the at least two monolithic bodies 170 are connected by connecting elements 175 before fastening the support 140 in the pipe-like shaped element 120,119.

[0155] Advantages of the process are e.g.: cold forming of the edge of a part (140, 160) in order to fix it (140, 160) in a pipe-like shaped element 120,119; created contact between the parts 120, 140, 160 and parts 140 and 30 to have a thermal path from heat spreader, i.e. the support 140 and the optional support assist 160, to the heatsink, i.e. the pipe-like shaped element 120,119 and optionally the optics 30; use of the created contact between the parts 140, 120,119 to have a mechanical fixation; optionally a simplified assembly sequence meaning adding the pipe-like shaped element 120,119 as the last part; logistical optimization, less stock, reduction of obsolete stock; low investment cost.

[0156] FIG. 6 schematically depicts some embodiments of the arranging stage. The embodiments may depict several different embodiments. The embodiment schematically depicts three supports 140; of which (the top) one support 140 comprises is provided by at least two monolithic bodies 170 (and hence comprising the optics 30 for a light source 10. The other supports 140 are depicted to further explain the options of the process for fastening a support 140 at a shaped element 120. In an embodiment the lighting device element 100 may comprise e.g. at least one of these supports 140. For instance, the middle support 140 and the bottom support 140 as depicted in the figure may be provided in the same lighting device element 100. In other embodiments, the top support 140 and the bottom support 140 may be provided in the same lighting device element 100, see further below.

[0157] At the top of the figure a pipe-like shaped element 120,119 comprising a restriction or rest 125 in the cross section or diameter 124 of the pipe-like shaped element 120,119 is depicted, i.e. there the inner diameter 124 of the pipe-like shaped element (locally) is not constant, i.e. at or in the direct vicinity of a support 140 the inner diameter 124 varies from a relatively small diameter 124a to a relatively large diameter 124b. A support 140 (or a support assist 160), in the embodiment being part of the combined support and optics 177, may be arranged on the rest 125, and pressing may provide a fastening of the support 140 (or the support assist 160) (fastening material 145) against or into the pipe-like shaped element wall 121.

[0158] In the middle of the figure, a support 140 received in a support assist 160 is depicted, wherein the support assist comprises two parts 165, 166.

[0159] At the bottom also a support 140 in a support assist 160 is depicted. Of course, the order of the supports 140 may also be selected differently.

[0160] The support 140 may be fastened by pressing with the pressing element 205. Especially, the pipe-like shaped element 120,119 may comprise a circular cross-section. To fasten the support 140, the invention provides in different embodiments that pressure can be applied in a point, partial trajectory or a line fully around the periphery of the support 140 and/or the support assist 160. In the depicted embodiment the pressing element 205 comprises a position where it may contact one part 166 of the support assist 160 (the schematically depicted other position of the pressing element 205 is shown in phantom lines to illustrate an alternative position). Especially pressing may be applied at multiple points of the support assist 160. The pressing element 205 may rotate around the center axis 207 of the pressing element 205, (especially the center axis 207 of the positions of the pressing element 205 during successive pressing actions) and press material 145 in an outward direction relative to a central axis 207 to fasten the support 140 in the support assist 160 and to fasten the support assist 160 against or into the pipe-like shaped wall 121. In embodiments, one of the elements 205 is configured with holding elements and the support 140 may be held by (removable) holding elements, to position the support before and during the application of pressure.

[0161] Especially, for providing the middle support 140 and the bottom support 140 in one device element 100, the middle support 140 may be provided first. Next, the bottom support 140 may be provided, after arranging a pressing element 205 (or optionally two or more pressing elements 205) between the middle support 140 and the bottom support 140. In other embodiments the second part 166 of the support assist 160 located at the middle support 140 may comprise the pressing element 205. Especially in such embodiments pressing may provide fastening the middle support 140 and the bottom support 140 in one pressing action. For instance in this way, more than one support and/or support assist may be configured within the pipe-like shaped element 120,119. The fixed middle support 140 and the bottom support 140 and the pipe-like shaped element 120,119 together form a gastight chamber 126 when the fixation of the support is fully circumferential, which is obtained by the use of fully circumferential pressing elements 205. In said gastight chamber 126 oxidation sensitive elements may be accommodated. Note that the length of the pressing elements 205 located in the chamber 126 may be tailor made to set the length/size of the chamber. The terms middle support or support in the middle may also refer to a plurality of middle supports.

[0162] FIG. 7 schematically depicts an embodiment of a lighting device 1000 as described herein, here comprising a plurality of pipe-like shaped elements 120,119. Both lighting device elements 100 comprising a pipe-like shaped element 120,119 and a light source 10 and optics 30 for the light source 10. Especially, both lighting device elements 100 comprise at least two monolithic bodies 170 (not shown). The lighting device 1000 is assembled from the two lighting device elements 100 and some other elements, such as hinges and a central plate for mounting the lighting device 1000. In this embodiment one lighting device element 100 comprises a pipe-like shaped element 120,119 comprising a circular cross-section, while the other lighting device element 100 comprises a squared cross-section. In other embodiments, the lighting device elements 100 comprise other types of cross-sections. Here, the right lighting device element 100 is especially depicted to indicate a pipe-like shaped element 120,119 having a square internal cross-section (and a square external cross-section). Note however that optionally the right lighting device element 100 may alternatively have a circular (or other) shaped internal cross-section.

[0163] In FIG. 8 a photograph of an embodiment is given showing the support 140 fastened to the pipe-like shaped element 120,119. Pressing the fastening material 145 hereby resulted in the indentation 147 and the protrusion of the support 140 over a protrusion distance 123 in the wall material 1145 of the pipe-like shaped element 120,119. Especially, the protrusion distance 123 is smaller than the thickness 122 of the wall of the pipe-type shaped element 120.

[0164] FIG. 9. Schematically depicts some further aspects of an embodiment of the lighting device element 100. The lighting device element 100 schematically depicted in FIG. 9, comprises a pipe-like shaped element 120,119 and various functional elements 180, i.e., a light source 10, an additional light source 101, electronics 20 for the light source 10 and 101, optics 30 for the light source 10, and a diffuse reflective coating 1213 for the light source 101. Not only a support 140 (optionally provided by the at least two monolithic elements 170) is fastened into the pipe-like shaped element 120,119 at its inner wall surface 1211, but further a support 140 is also fastened around the pipe-like shaped element at the outer wall surface 1212 of the pipe-like shaped element. Both supports 140 are fastened by pressing with a pressing element 205 (see FIG. 5) the fastening material 145 against and/or into a pipe-like shaped element wall 121 of the pipe-like shaped element 120,119. On the support 140 fastened to the outer wall surface an additional light source 101 is mounted, which outer support 140 simultaneously functions as a heat sink 1401 by being shaped as a fin extending radially form the pipe-like shaped element, which fin shape is a cooling feature of the heat sink. During operation the light source 10 typically provides a narrow light beam 11, that may be directed by the optic 30 for the light source light 10, and the additional light source 101 provides a relatively wide beam 102. The combination of the light source 10 and the additional light source 101 can provide an attractive light pattern of a narrow beam surrounded by a diffuse halo of lower intensity and different color or color temperature. To enhance the diffusiveness of the halo the outer wall surface 1212 is (locally) provided with a highly diffuse reflective coating 1213. The pipe-like shaped element 120,119 has an essentially invariable inner diameter 124 and invariable outer diameter 127, at least at and in the direct vicinity of the fixed support 140, in particular the support 140 does not abut, rest or press upon a (locally) reduced inner diameter portion of the pipe-like shaped element 120. In this embodiment both supports 140 comprise at least part of the fastening material 145. In this embodiments also further optics 30 are depicted. Especially, the further optics 30, e.g. louvres in front of the light, may not be functionally coupled to the support 140. However, the further optics 30 may in embodiments (also) be functionally coupled to the support 140, schematically indicated by the dotted connection line. Especially, the functional elements 180 are coupled to a support 140. Especially further functional elements such as the further optics 30may not be coupled to a support 140.

[0165] FIG. 10 schematically depicts some further aspects of an embodiment of the lighting device element. The lighting device element 100 schematically depicted in FIG. 10, comprises as a shaped element 120 a rod-like shaped element 129 with an outer diameter 128, and various functional elements 180, i.e., a light source 10, electronics 20 for the light source 10, optics 30 or the light source 10, and a heat sink 1401 for the light source 10. Again, the support 140 and the optics for the light source 10 are provided by at least two monolithic bodies 170. However in other embodiments, the optics 30 may also be provided to the support 140 after fastening the support 140 to the rod-like shapes element 120,129. A support 140 is fastened to the rod-like shaped element 120,129 at its outer wall surface 1212 of the rod-like shaped element. The support 140 is fastened by pressing with a pressing element 205 (see FIG. 5) the fastening material 145 against and/or into a rod-like shaped element wall 121 of the rod-like shaped element 120,129. The heat sink 1401 comprises a plurality of pipes as a cooling feature 1402 which are fastened in openings of the support 140 by pressing with a pressing element 205 (see FIG. 5) the fastening material 145 against and/or into pipe wall 1403 of the pipes 1402, i.e. similar to the way of fastening the support to the rod-like shaped element.

[0166] FIGS. 11A-D schematically depict some further aspects of further embodiments of the lighting device element 100. FIG. 11A shows cross-sectional view and FIG. 11B shows a top view of a rod-like shaped element 120,129 with a support fastened 140 to the outer wall surface 1212 and radially extending outwards away from the central axis 207. It is noted that to explain these aspects, the optics 30 for a light source light 10 and e.g. an optional light source 10 are not depicted in the figures. Embodiments comprising these aspects, however may also comprise the combined support and optics 177, and therefore optics 30 for a light source 10 if the support 140 is provided by at least two monolithic bodies 170.

[0167] The support 140 acts as a heat sink 1401 and has as cooling feature 1402 a plurality of circular openings, see FIG. 11B. FIG. 11C shows cross-sectional view of a lighting device element 100 comprising a pipe-like shaped element 120,119 with a support 140 fastened to the outer wall surface 1212. The support acts as a heat sink 1401 and has as cooling feature 1402 an embossing. FIG. 11D shows cross-sectional view of a lighting device element 100 comprising a pipe-like shaped element 120,119 with a support 140 fastened to the outer wall surface 1212. The support 140 acts as a heat sink 1401 and has as cooling feature 1402 a plurality of fins radially extending outwards, away from the central axis 207.

[0168] FIG. 12 schematically depicts four monolithic bodies 170, already assembled in two identical pairs, that when being mutually connected provide the support 140 and the optics 30 for the light source 10 (and the combined support and optics 177). Especially, all four monolithic bodies 170 comprise (at least) part of the support 140 and (at least part of) the optics 30 for the light source 10. The (parts of the) optics 30 comprises a reflector 35, especially comprising a reflective surface 37. In the embodiment, the optics 30 further comprises a polished surface 31, especially to enhance reflection of light. In the same figure also optics 30 further comprising a coating 32, especially to affect the light is depicted. The embodiment further depicts the reflective surface 37 comprising facets 38. In embodiments, especially either a coating 32, or another type of reflection enhancer may be present. A coating 32 and, e.g., (polished) facets 38, however, may also be present in the same embodiment. The monolithic bodies 170 may especially be provided by thixomolding, especially allowing providing complex structures comprising thin elements. In embodiments, e.g. the optics 30 comprises a thickness 39 selected in the range of 0.1-5 mm.

[0169] The four monolithic bodies may be connected by one or more connecting elements 175, such as slotted spring pins 176. In other embodiments, connecting elements 175 may comprise different elements known in the art to connect different element, e.g., dovetail joints. Especially, after physically connecting the monolithic bodies 170 the monolithic bodies mutually contact each other, and especially a combined support and optics 177 may be provided.

[0170] FIG. 13A-B respectively show a perspective view of one of the two monolithic bodies 170 and a cross sectional view of a lighting device element 100 comprising a lighting device 1000 and a pipe-like shaped element 120,119. Said monolithic bodies 170 provide the support 140 and the optics 30 for the light source 10 (and the combined support and optics 177). The monolithic body 170 has a form-factor such that in assembled configuration with its counterpart monolithic body, a form-fitting cavity 171 is formed for accommodating and fixing at least one functional element 180, i.e. a COB light source as shown in FIG. 13B. The form factor is such that the functional element 180 accommodated in once joined at least two monolithic bodies 170, can only be released from the form-fitting cavity 171 upon disassembling the joined at least two monolithic bodies 170.

[0171] The term substantially herein, such as in substantially all light or in substantially consists, will be understood by the person skilled in the art. The term substantially may also include embodiments with entirely, completely, all, etc.

[0172] Hence, in embodiments the adjective substantially may also be removed. Where applicable, the term substantially may also relate to 90% or higher, such as 95% or higher, especially 99% or higher, even more especially 99.5% or higher, including 100%. The term comprise includes also embodiments wherein the term comprises means consists of. The term and/or especially relates to one or more of the items mentioned before and after and/or. For instance, a phrase item 1 and/or item 2 and similar phrases may relate to one or more of item 1 and item 2. The term comprising may in an embodiment refer to consisting of but may in another embodiment also refer to containing at least the defined species and optionally one or more other species.

[0173] Furthermore, the terms first, second, third and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operation in other sequences than described or illustrated herein.

[0174] The devices herein are amongst others described during operation. As will be clear to the person skilled in the art, the invention is not limited to methods of operation or devices in operation.

[0175] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. Use of the verb to comprise and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. The article a or an preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the device claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

[0176] The invention further applies to a device comprising one or more of the characterizing features described in the description and/or shown in the attached drawings. The invention further pertains to a method or process comprising one or more of the characterizing features described in the description and/or shown in the attached drawings.

[0177] The various aspects discussed in this patent can be combined in order to provide additional advantages. Further, the person skilled in the art will understand that embodiments can be combined, and that also more than two embodiments can be combined. Furthermore, some of the features can form the basis for one or more divisional applications.