Luminaire for track lighting system

Abstract

The present invention provides a luminaire configured to be connected to a track of a track lighting system, the track of the track lighting system being mounted to a mounting surface, where the luminaire comprises: a rear surface facing the track when the luminaire is connected to the track; a planar light exit window disposed opposite to the rear surface; a connector connected to the rear surface and protruding away from the rear surface by a connector length wherein the connector is configured for mechanically and electrically connecting the luminaire to the track; at least one spacing element connected to the rear surface and protruding from the rear surface by a spacing length wherein the at least one spacing element is configured to contact the mounting surface when the illuminator is connected to the track.

Description

Technical Field

[0001] The invention relates to a luminaire configured to be connected to a track of a track lighting system. The invention also relates to a track lighting system comprising a track and at least one luminaire according to the invention. The invention also relates to a corresponding method of connecting such a luminaire to a track of a track lighting system. Background Art

[0002] It is well known that track lighting systems, in which track lighting devices (eg, luminaires) are mounted on a track, provide a great deal of flexibility and adaptability, since the number of track lighting devices and / or the positioning of the track lighting devices on the track can be varied.

[0003] Track lighting systems are usually implemented in professional places. Currently, the luminaires implemented in track lighting systems are mostly point light sources connected at various points on the track. For example, a typical example of such a track lighting system is a retail environment with multiple spotlights on the lighting track.

[0004] A current trend in the lighting business is to mount large area luminaires (e.g. light panels) onto the track of a track lighting system. Another trend is that track lighting systems are increasingly implemented in domestic environments (such as in living rooms and / or kitchens). Due to their (large area) size, it may be cumbersome to ergonomically mount large area luminaires to the track. Due to the larger size of large area luminaires (e.g. light panels) relative to the track, it may also be more difficult to establish and / or maintain their desired orientation.

[0005] As track lighting systems become more popular and widespread, and because large area luminaires (such as light panels) address the aforementioned disadvantages in installation and / or orientation, there is a real need to find less cumbersome and more ergonomic solutions for connecting track lighting devices to the tracks of a track lighting system. Summary of the invention

[0006] An object of the present invention is to provide an improved luminaire configured to be connected to a track of a track lighting system, which luminaire at least alleviates the above-mentioned problems and disadvantages. To this end, the present invention provides a luminaire configured to be connected to a track of a track lighting system, the track of the track lighting system being mounted to a mounting surface, wherein the luminaire comprises: a rear surface, which faces the track when the luminaire is connected to the track; a planar light exit window, which is arranged opposite to the rear surface; a connector, which is connected to the rear surface and protrudes away from the rear surface by a connector length, wherein the connector is configured to mechanically and electrically connect the luminaire to the track; at least one spacing element, which is connected to the rear surface and protrudes from the rear surface by a spacing length, wherein the at least one spacing element is configured to contact the mounting surface when the luminaire is connected to the track.

[0007] Another object of the present invention is to provide an improved track lighting system which at least alleviates the above mentioned problems and disadvantages. To this end, the present invention provides a track lighting system comprising: a track mounted to a mounting surface; a luminaire according to the present invention; wherein the luminaire is mechanically and electrically connected to the track, wherein when the luminaire is connected to the track, the at least one spacing element of the luminaire contacts the mounting surface. Therefore, the advantages and / or embodiments applicable to the luminaire according to the present invention are applicable mutatis mutandis to the track lighting system according to the present invention.

[0008] Thus, the present invention provides a luminaire configured to be connected to a track of a track lighting system. The track is mounted to a mounting surface. The track may thus be mounted on a mounting surface or recessed into a mounting surface. Throughout this application, the track may alternatively be described as a power track of a track lighting system.

[0009] The luminaire comprises a rear surface. When the luminaire is connected to the track, the rear surface faces the track. The luminaire further comprises a planar light exit window arranged opposite the rear surface. The light exit window is configured to transmit light in operation. The luminaire further comprises a connector protruding away from the rear surface by a connector length. The connector enables the luminaire to be mechanically and electrically connected to the track of the track lighting system. The connector can thus be connected to a connection point on the track.

[0010] The luminaire according to the present invention further comprises at least one spacing element, which is connected to the rear surface of the luminaire and protrudes away from the rear surface by a spacing length. Because the rear surface faces the track when the luminaire is connected (or mounted) to the track, the rear surface also faces the mounting surface. Therefore, the at least one spacing element is configured to contact the mounting surface when the luminaire is connected to the track.

[0011] This is obviously advantageous. Since the luminaire comprises at least one spacing element in addition to the connector, and since the at least one spacing element is configured to contact the mounting surface when the luminaire is connected to the track, the luminaire can be more ergonomically aligned with the mounting surface when the connector is connected to the track.

[0012] Furthermore, the at least one spacing element may serve as an initial support for the luminaire, after which the connector of the luminaire may be mechanically and electrically connected to the track. This may facilitate secure mounting of the luminaire to the track.

[0013] Furthermore, after installation, when the connector of the luminaire is mechanically and electrically connected to the track, because the at least one spacing element contacts the mounting surface, the at least one spacing element will advantageously limit the extent of at least one movement of the luminaire, in particular limiting the rotation (or tilting) of the luminaire about the connection point where the connector is connected to the track. This can advantageously facilitate maintaining a substantially fixed (or constant) orientation of the luminaire relative to the mounting surface. This can provide more stability.

[0014] For example, when the luminaire is connected to the track, the at least one spacing element will also contact the mounting surface, thereby establishing a first mechanical contact point at the connection point of the connector to the track, and establishing at least one further mechanical contact point at the point where the at least one spacing element contacts the mounting surface. The multiple contact points limit the movement of the luminaire when connected to the track, in particular limit the rotation (or tilting) of the luminaire around the connection point where the connector is connected to the track. Thus, the at least one spacing element can help to maintain the orientation of the luminaire relative to the mounting surface to be substantially fixed. This allows for greater stability. This is particularly advantageous for large area luminaires (e.g. light panels), the edges of which can extend a significant distance away from the connection point where the connector is connected to the track compared to point source luminaires (e.g. spotlights). Moreover, as described above, before the luminaire is connected (e.g. snap-connected) to the track, for example, further support can be provided.

[0015] The luminaire according to the invention may be, for example, a light panel or an elongated light strip. Such a light panel may comprise an outline defining a square shape, a rectangular shape, a triangular shape, a polygonal shape, a circular shape, an elliptical shape or a free-form shape.

[0016] In some examples, the connector may protrude further from the rear surface than the at least one spacing element. In alternative examples, the at least one spacing element may protrude further from the rear surface than the connector.

[0017] In some examples, at least one spacing element may be detachably connected to the rear surface, thereby serving as an additional feature or additional module of the luminaire. Alternatively, the at least one spacing element may be integral with the rear surface, such that the rear surface of the luminaire may be made of a single piece of material.

[0018] In one embodiment, the spacing length of the at least one spacing element is adjustable from a first spacing length to a second spacing length.

[0019] Thus, the at least one spacing element is adjustable in spacing length. This may be advantageous. That is, when connecting the luminaire to the track, the at least one spacing element may contact the mounting surface before the connector is mechanically and electrically connected to the track. This can provide alignment, support and tactile feedback to the installer when connecting (or mounting) the luminaire to the track. Due to the tactile feedback, for example, the installer may learn that the connector of the luminaire is close to the corresponding connection point relative to the track when experiencing the tactile feedback of the at least one spacing element (generated due to the at least one spacing element contacting the mounting surface).

[0020] Furthermore, the installer may more easily notice any skewed alignment of the luminaire during installation. That is, in some envisioned examples, when the luminaire is connected to the track at a skewed angle relative to the mounting surface, the spacing length of a first one of the at least one spacing element may be adjusted (i.e., deformed or contracted) before another second one of the at least one spacing element. This may enable the installer to experience a greater (reaction) force at the location of the first spacing element before the second spacing element, thereby receiving tactile feedback that the luminaire may be misaligned relative to the mounting surface.

[0021] In one embodiment, the spacing length may be defined in a direction perpendicular to the planar light exit window. Similarly, in one embodiment, the connector length may be defined in a direction perpendicular to the planar light exit window.

[0022] In an embodiment, the rear surface may be parallel to the planar light exit window.

[0023] In one embodiment, each of the at least one spacer element comprises the same first spacing length. Therefore, the first spacing length can be considered as an initial spacing length. The first spacing length can be the length of the at least one spacer element at rest, or in an unadjusted state, or in an undeformed state.

[0024] In one embodiment, the first interval length and the second interval length differ in length by at least 1.2 times. In one embodiment, the first interval length and the second interval length differ in length by at most 5 times, preferably at most 3 times, and most preferably at most 2.5 times.

[0025] As described above, the luminaire according to the present invention comprises at least one spacing element, which is configured to contact the mounting surface when the luminaire is connected to the track. More specifically, in one embodiment, at least one spacing element may include: a base connected to the rear surface; a top end configured to contact the mounting surface when the luminaire is connected to the track; and a body extending between the base and the top end.

[0026] Thus, the top end is configured to contact the mounting surface when the luminaire is connected to the track. Thus, in an embodiment, the top end may include rubber or fabric. Such rubber or fabric may prevent damage or scratches to the mounting surface. Such rubber or fabric may also prevent the luminaire from sliding when mounting the luminaire to the mounting surface and / or the track of the track lighting system.

[0027] Additionally or alternatively, in one embodiment, the top end may include an adhesive layer configured to establish an adhesive contact between (the top end of) the at least one spacing element and the mounting surface. Such an adhesive layer may provide greater robustness to the connection.

[0028] Additionally or alternatively, in an embodiment, the top end may include a texture. The texture may be configured to increase friction in contact between the top end and the mounting surface. Such a texture may also prevent the luminaire from slipping when the luminaire is mounted to the mounting surface and / or the track of the track lighting system.

[0029] In alternative examples, the spacing length may be defined as the shortest length between the rear surface and the top. Alternatively, in other examples, the spacing length may be defined as the distance between the base and the top. However, preferably, as previously mentioned, the spacing length may be defined in a direction perpendicular to the planar light exit window.

[0030] As mentioned, the spacing length of the at least one spacing element is adjustable from a first spacing length to a second spacing length.The at least one spacing element is adjustable, for example, based on elastic deformation.

[0031] In one embodiment, the body may be configured to elastically deform when subjected to a force; wherein the spacing length of the at least one spacing element may be adjusted from the first spacing length to the second spacing length by controlling the force on the top end.

[0032] The control force on the tip may be caused by movement of the rear surface of the luminaire to the mounting surface, thereby pushing the at least one spacing element towards the base. Alternatively, the control force on the tip may be caused, for example, by manual force applied by an installer to set the spacing length.

[0033] In a first related embodiment, the body may include a spring configured to elastically deform when subjected to a force; wherein the spacing length of the at least one spacing element can be adjusted from the first spacing length to the second spacing length by forcing the top end toward the base. The spring may, for example, be a leaf spring or a coil spring. In other words, in an example, the body may, for example, include a flexible (or bendable) sheet of metal.

[0034] In a second related embodiment, the body may include rubber configured to elastically deform when subjected to force; wherein the spacing length of the at least one spacing element can be adjusted from the first spacing length to the second spacing length by forcing the top end toward the base.

[0035] As mentioned, the spacing length of the at least one spacing element is adjustable from a first spacing length to a second spacing length.The at least one spacing element is adjustable, for example, based on plastic deformation.

[0036] In one embodiment, the body can be configured to plastically deform when subjected to a force; wherein the spacing length of the at least one spacing element can be adjusted from the first spacing length to the second spacing length by controlling the force on the top. The body can, for example, include a body material, which is metal or plastic or wood (such as paper or cardboard). In many aspects, the body can include a deformable grid or a deformable structure. In many aspects, the at least one spacing element can be 3D printed.

[0037] Considering embodiments in which at least one spacing element is adjustable based on elastic or plastic deformation, further exemplary embodiments can be provided in which the second spacing length can be shorter than the first spacing length. Thus, the at least one spacing element can be retracted, pressed, contracted, etc. based on contact with a mounting surface, wherein the luminaire moves (or is pushed) toward the mounting surface.

[0038] Considering embodiments where the at least one spacing element can be adjusted based on elastic or plastic deformation, the deformation can be characterized as from a first undeformed state to a second deformed state. Therefore, the first spacing length can be the spacing length in (or corresponding to) the undeformed state (of the body), and the second spacing length can be the spacing length in (or corresponding to) the deformed state (of the body).

[0039] As mentioned, the spacing length of the at least one spacing element is adjustable from a first spacing length to a second spacing length.The at least one spacing element is adjustable, for example, based on a mechanical configuration.

[0040] For example, in one embodiment, the body may include: a socket including an internal thread; and a rod including an external thread; wherein the rod is arranged coaxially with the socket; wherein the external thread of the rod engages with the internal thread of the socket; wherein the rod can be configured to move in a direction toward the base by rotating the rod in a first rotational direction within the socket, and wherein the rod can be configured to move in a direction away from the base by rotating the rod in a second rotational direction within the socket; wherein the second rotational direction is opposite to the first rotational direction; wherein the spacing length of the at least one spacing element can be adjusted from the first spacing length to the second spacing length by rotating the rod within the socket.

[0041] The first rotational direction may, for example, be clockwise and the second rotational direction may, for example, be counterclockwise, or vice versa.

[0042] Alternatively, in other examples, the body may include a telescopic rod, wherein the spacing length of the at least one spacing element may be adjusted from the first spacing length to the second spacing length by extending or contracting the telescopic rod.

[0043] Alternatively, in other examples, the body may include a socket and a rod, wherein the rod is arranged coaxially with the socket, wherein the rod is movable in the socket in a direction toward the base, wherein the rod is lockable in the socket, wherein the spacing length of the at least one spacing element is adjustable from the first spacing length to the second spacing length by moving the rod in the socket and locking the rod in the socket. Still alternatively, the rod may be press-fitted in the socket, or the rod may be snap-fitted in the socket.

[0044] As described above, the luminaire according to the present invention comprises at least one spacing element configured to contact the mounting surface when the luminaire is connected to the track. The luminaire further comprises a connector configured to mechanically and electrically connect the luminaire to the track. The at least one spacing element and the connector are both arranged on the rear surface and protrude away from the rear surface by a spacing length and a connector length, respectively.

[0045] In one embodiment, the rear surface comprises a contour; wherein the at least one spacing element can be arranged closer to the contour than the connector. Such an embodiment is advantageous because the at least one spacing element can provide support and / or alignment close to the perimeter or contour of the rear surface, which is a suitable location for such support and / or alignment (especially for large area luminaires).

[0046] In other embodiments, the rear surface may include a profile; wherein each of the at least one spacing element may be located at a corresponding spacing position on the rear surface; wherein the shortest distance between each corresponding spacing position and the profile is at least equal to the spacing length. Thus, when the luminaire is connected to the mounting surface, the at least one spacing element may remain substantially invisible. For example, such an embodiment may be advantageous because when mounted to a track, the at least one spacing element will be offset relative to the periphery of the rear surface and thereby not visible from a wider angle below the luminaire.

[0047] In other embodiments, the rear surface may include a geometric center; wherein the at least one spacing element includes a first spacing element arranged at a first spacing position on the rear surface and a second spacing element arranged at a second spacing position on the rear surface; wherein the first spacing position is symmetrical to the second spacing element relative to a symmetry plane passing through the geometric center. Such an embodiment may provide greater stability and alignment due to the symmetrically aligned at least one spacing element. Such a symmetrical configuration may be advantageous for alignment because the first and second spacers are optimally positioned over the entire rear surface of the luminaire. In many aspects, the first spacing position and the second spacing position may be antipodal.

[0048] As described above, the luminaire includes a connector. The connector is connected to the rear surface and protrudes away from the rear surface by a connector length. The connector is configured to mechanically and electrically connect the luminaire to the track.

[0049] In an embodiment, the connector may be located at the geometric center of the rear surface. Alternatively, in an embodiment, the connector may be positioned offset relative to the geometric center of the rear surface. Such an embodiment may enable luminaires to be connected to a track lighting system asymmetrically, while the at least one spacing element according to the invention may provide a more ergonomic mounting and / or alignment relative to the track.

[0050] In an embodiment, the connector length of the connector is adjustable from a first connector length to a second connector length. Therefore, the connector is adjustable in connector length. This may be advantageous. That is, when connecting the luminaire to the track, the connector may electrically and mechanically connect the luminaire to the track and subsequently pull the luminaire towards the mounting surface. Thus, the at least one spacing element may facilitate correct alignment of the luminaire.

[0051] More specifically, in one embodiment, the connector may include: a foot connected to a rear surface; a head configured to mechanically and electrically connect the luminaire to the track; an extendable member extending between the foot and the head; wherein the extendable member may include a spring lock configured to switch between a locked state and a released state; wherein, in the locked state, the connector has the first connector length; wherein, in the released state, the connector has the second connector length; wherein the second connector length is shorter than the first connector length.

[0052] It is a further object of the present invention to provide an improved method which at least alleviates the above-mentioned problems and disadvantages. To this end, the present invention provides a method of connecting a luminaire according to the present invention to a track of a track lighting system mounted to a mounting surface, wherein the method comprises: mechanically and electrically connecting the luminaire to the track; adjusting a first spacing length of the at least one spacing element to a second spacing length of the at least one spacing element. Therefore, the advantages and / or embodiments applicable to the luminaire and / or the track lighting system according to the present invention may be applied mutatis mutandis to the method according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The invention will now be further illustrated by means of the accompanying schematic, non-limiting drawings:

[0054] Figure 1A and Figure 1B An embodiment of a track lighting system according to the present invention is schematically shown;

[0055] Figure 2A and Figure 2B An embodiment of a track lighting system according to the present invention is schematically shown;

[0056] Figure 3A and Figure 3B An embodiment of a track lighting system according to the present invention is schematically shown;

[0057] Figure 4A and Figure 4B An embodiment of a track lighting system according to the present invention is schematically shown;

[0058] Figure 5 An embodiment of a luminaire according to the invention is schematically shown;

[0059] Figure 6 An embodiment of a track lighting system according to the present invention is schematically shown;

[0060] Figure 7 An embodiment of the method according to the invention is schematically depicted. DETAILED DESCRIPTION

[0061] Figure 1A An embodiment of a track lighting system 100 according to the invention is schematically depicted by way of non-limiting example. The track lighting system 100 comprises a luminaire 10 and a track 20. The luminaire 10 is configured to be connected to said track 20 mechanically and / or electrically. Figure 1A A side view of a first situation I in which the luminaire 10 is to be connected to the rail 20 and a second situation II in which the luminaire 10 is connected to the rail 20 is shown. In addition, Figure 1B The embodiment is schematically depicted in a top view by way of non-limiting example.

[0062] The track lighting system 100 comprises a luminaire 10 and a track 20. The track 20 is mounted to a mounting surface 30. The track 20 is thus mounted on the mounting surface 30. Alternatively, the track may be at least partially recessed into the mounting surface. The track 20 may be described as a power track. The track may comprise a cathode track and an anode track for powering the luminaire 10. The principles of track lighting systems are known in the art.

[0063] The luminaire 10 according to the present invention comprises a rear surface 1 and a planar light exit window 2. The planar light exit window 2 transmits light during operation. In many aspects, the rear surface can also be substantially flat, but this is not necessary. When the luminaire 10 is connected to the track 20, the rear surface 1 faces the track 20 and therefore faces the mounting surface 30. The planar light exit window 2 is arranged opposite to the rear surface 1. In the present embodiment, the luminaire 10 is a light panel. Alternatively, the luminaire can be an elongated light strip. The luminaire (i.e., the light panel) comprises a rectangular light exit window 2. The rear surface 1 of the luminaire 10 comprises a profile 7, wherein the profile 7 of the rear surface 1 is also rectangular.

[0064] Still see Figure 1A and Figure 1B , the illuminator 10 includes a connector 3. The connector 3 is connected to the rear surface 1 and protrudes a connector length 4 away from the rear surface 1. Here, the connector length 4 is defined in a direction perpendicular to the planar light exit window 2. Therefore, the connector length is defined as the shortest distance between the position where the connector (is connected and) protrudes from the rear surface 1 and the (freely extended) farthest point of the connector 3. The connector 3 is configured to mechanically and electrically connect the illuminator 10 to the track 20. This connection is known in the art. Alternatively, such a profile can be a square, a triangle, a polygon, a circle, an ellipse, a free form, or at least one combination of these shapes. For example, a rectangle with rounded corners.

[0065] According to the invention, the luminaire 10 further comprises at least one spacing element 5. The at least one spacing element 5 is connected to the rear surface 1 and protrudes away from the rear surface 1 by a spacing length 6. The spacing length 6 is also defined in a direction perpendicular to the planar light exit window 2.

[0066] As mentioned, the at least one spacing element 5 is connected to the rear surface 1 and protrudes away from the rear surface 1 by a spacing length 6. More specifically, the at least one spacing element 5 comprises a base 51 connected to the rear surface 1, a top 52, and a body 53 extending between the base 51 and the top 52. When the luminaire 10 is connected to the track 20, the at least one spacing element 5 (here in particular the top 52) contacts (or is configured to contact) the mounting surface 30. See the situation referred to as II.

[0067] Still see Figure 1A and Figure 1B , although optionally, the top end 52 of at least one of the spacing elements 5 comprises rubber or fabric. Thus, when the luminaire 10 is connected to said track 20, the top end 52 does not damage the mounting surface 30 by said contact.

[0068] Here, the rear surface of the luminaire 10 includes four spacing elements connected thereto, wherein the spacing elements are substantially arranged in the four corners (areas) defined by the rectangular outline 7. Thus, the at least one spacing element 5 is arranged closer to the outline 7 of the rear surface 1 than the connector 3. Thus, although not required, each spacing element 5 is located at a corresponding spacing position on the rear surface 1, wherein the shortest distance between each corresponding spacing position and the outline 7 is at least equal to the spacing length 6. Alternatively, the luminaire may include one, two, three, or at least four spacing elements. The spacing length may alternatively be defined as the distance between the base and the top end.

[0069] Still see Figure 1B, the rear surface 1 includes a geometric center. The connector 3 is arranged at the geometric center. The four spacing elements are symmetrical to each other with respect to a symmetry plane passing through the geometric center.

[0070] Here, this at least one spacer element 5 can be for example a rod element or a beam element with a fixed interval length. Alternatively, the interval length can be adjustable. This at least one spacer element 5 can for example include a spacer material, and the spacer material can be for example at least one of the following: polymer, ceramic, metal, or wood. This at least one spacer element 5 is detachably connected to the rear surface 1.

[0071] Still see Figure 1A and Figure 1B , the luminaire 10 according to the present invention is configured to be connected to a track 20. When the luminaire 1 is connected to the track 20, in case II, the connector 3 is electrically and mechanically connected to the track 20, and the at least one spacing element 5 contacts the mounting surface 30. This enables the luminaire 10 to be more ergonomically aligned with the mounting surface 30. In addition, after installation, when the connector 3 of the luminaire 10 is mechanically and electrically connected to the track 20, the at least one spacing element 5 contacts the mounting surface 30 at four corresponding positions associated with the spacing positions. This will advantageously limit the extent of at least one movement of the luminaire 10, in particular the rotation (or tilting) of the luminaire 10 around the connection point where the connector 3 is connected to the track 20 (i.e., the geometric center of the rear surface 1). The luminaire 10 can therefore be fixed more stably relative to the track 20 and relative to the mounting surface 30, because the luminaire 10 can no longer rotate around the geometric center. This is particularly advantageous for large-area luminaires, such as the light panel 10 depicted here.

[0072] Figure 2A and Figure 2B An embodiment of a track lighting system 200 according to the invention is schematically depicted by way of non-limiting example. The track lighting system 200 comprises a luminaire 60 and a track 70. The luminaire 60 is configured to be connected to said track 70 mechanically and / or electrically. Figure 2A A side view of a first situation I in which the luminaire 60 is to be connected to the rail 70 and a second situation II in which the luminaire 60 is connected to the rail 70 are depicted. In addition, Figure 2B The embodiment is schematically depicted in a top view by way of non-limiting example.

[0073] The track lighting system 200 comprises a luminaire 60 and a track 70. The track 70 is mounted to a mounting surface 80. The track 70 is thus mounted on the mounting surface 80. Alternatively, the track may be at least partially recessed into the mounting surface. The track 70 may be described as a power track. The track may comprise a cathode track and an anode track for powering the luminaire 60. The principles of track lighting systems are known in the art.

[0074] The illuminator 60 according to the present invention comprises a rear surface 11 and a planar light exit window 12. The planar light exit window 12 transmits light in operation. In many aspects, the rear surface 11 may also be substantially planar, but this is not necessary. When the illuminator 60 is connected to the track 70, the rear surface 11 faces the track 70, and therefore faces the mounting surface 80. The planar light exit window 12 is arranged relative to the rear surface 11. In the present embodiment, the illuminator 60 is a light panel. Alternatively, the illuminator may be an elongated light bar. The illuminator 60 (i.e., the light panel) comprises a rectangular light exit window 12. The rear surface 11 of the illuminator 60 comprises a profile 17, wherein the profile 17 of the rear surface 11 is also rectangular. Alternatively, such a profile may be a square, a triangle, a polygon, a circle, a star, an ellipse, a free form, or at least one combination of these shapes. For example, a rectangle with rounded corners.

[0075] Still see Figure 2A and Figure 2B , the illuminator 60 includes a connector 13. The connector 13 is connected to the rear surface 11 and protrudes a connector length 14 away from the rear surface 11. Here, the connector length 14 is defined in a direction perpendicular to the planar light exit window 12. Therefore, the connector length 14 is defined as the shortest distance between the position where the connector 13 (is connected and) protrudes away from the rear surface 11 and the (freely extended) farthest point of the connector 13. The connector 13 is configured to mechanically and electrically connect the illuminator 60 to the track 70. This connection is known in the art. In the present embodiment, the connector 13 is fixed, but alternatively the connector length may be adjustable.

[0076] According to the invention, the luminaire 60 further comprises at least one spacing element 15. The at least one spacing element 15 is connected to the rear surface 11 and projects away from the rear surface 11 by a spacing length 16, 18. The spacing length 16, 18 is also defined in a direction perpendicular to the planar light exit window 12.

[0077] As mentioned, the at least one spacing element 15 is connected to the rear surface 11 and protrudes away from the rear surface 11 by a spacing length 16, 18. More specifically, the at least one spacing element 15 includes a base 151 connected to the rear surface 11, a top 152, and a body 153 extending between the base 151 and the top 152. When the luminaire 60 is connected to the track 70, the at least one spacing element 15 (here in particular the top 152) contacts (or is configured to contact) the mounting surface 80. See the case referred to as II. In various aspects, the second spacing length 18 can be at most 1 / 1.2 of the first spacing length 16.

[0078] Although optional, the top end 152 of at least one of the spacing elements 15 comprises rubber or fabric. Therefore, when the luminaire 60 is connected to the track 70, the top end 152 does not damage the mounting surface 80 by the contact.

[0079] Still see Figure 2A and Figure 2B , the depicted embodiment is characterized in that the at least one spacing element 15 is adjustable, i.e. the at least one spacing element 15 is adjustable from a first spacing length 16 to a second spacing length 18. The body 153 of the at least one spacing element 15 is configured to elastically deform when subjected to force. Here, the body 153 of the at least one spacing element 15 comprises a spring in order to elastically deform the at least one spacing element 15 when subjected to force. Alternatively, the spring may be rubber, or any other plastically deformable rod or beam.

[0080] Therefore, by controlling the force on the top end 152, the spacing length of the at least one spacing element 15 can be adjusted from the first spacing length 16 to the second spacing length 18. That is, in the present embodiment, when the luminaire 60 is connected to the track 70, when the at least one spacing element 15 contacts the mounting surface 80, the force originates from the reaction force of the mounting surface 80 acting on the top end 152. Therefore, when the luminaire 60 is connected to the track 70, when the top end 152 is forced toward the base 151, the spring of the body 153 is compressed. Therefore, by forcing the top end 152 toward the base 151, the spacing length of the at least one spacing element 15 can be adjusted from the first spacing length 16 to the second spacing length 18. Therefore, the second spacing length 18 is shorter than the first spacing length 16.

[0081] Here, see Figure 2B, the at least one spacing element 15 is composed of a second spacing element 215 and a first spacing element 115 connected to the rear surface 11. The rear surface 11 includes a geometric center 113. The connector 13 is arranged at the geometric center. The first spacing element 115 and the second spacing element 215 are arranged relative to each other on a diagonal 119 passing through the geometric center of the rear surface 11, that is, arranged in a relative corner (area) defined by the rectangular outline 17. The first spacing element 115 and the second spacing element 215 are therefore symmetrical to each other relative to a symmetry plane passing through the geometric center. At least one spacing element 15 (i.e., the first spacing element 115 and the second spacing element 215) is therefore arranged to be closer to the outline 17 of the rear surface 11 than the connector 13. Alternatively, the illuminator may include one, three, or at least four spacing elements. The spacing length may alternatively be defined as the distance between the base and the top.

[0082] The at least one spacing element 15 may, for example, comprise a spacing material, which may, for example, be at least one of: a polymer, a ceramic, a metal, or a wood.The at least one spacing element 5 may be detachably connected to the rear surface 1 .

[0083] Still see Figure 2A and Figure 2B , the luminaire 60 according to the present invention is configured to be connected to the track 70. When the luminaire 60 is connected to the track 70, in the case II as depicted, the connector 13 is electrically and mechanically connected to the track 70, and (the top end 152 of) the at least one spacing element 15 contacts the mounting surface 80. This enables the luminaire 60 to be more ergonomically aligned with the mounting surface 80. Furthermore, after installation, when the connector 13 of the luminaire 60 is mechanically and electrically connected to the track 70, the at least one spacing element 15 contacts the mounting surface 80 at two corresponding positions. This will advantageously limit or inhibit the extent of at least one movement of the luminaire 60, in particular limit or inhibit the rotation (or tilting) of the luminaire 60, for example, around the extension axis of the elongated track 70. The luminaire 60 can therefore be more stably fixed relative to the track 70 and relative to the mounting surface 80, because the luminaire 60 can no longer rotate around the geometric center 113 (in the plane of the diagonal 119), or its rotation around the geometric center 113 is inhibited. This is particularly advantageous for large area luminaires such as the light panel 60 depicted here.

[0084] Another advantage is that the at least one spacing element 15 is adjustable in spacing length from a first spacing length 16 to a second spacing length 18, which is caused by the elastic deformation of the spring. When connecting the luminaire 60 to the track 70, the at least one spacing element 15 contacts the mounting surface 80 before the connector 13 is mechanically and electrically connected to the track 70. This can provide alignment, support and tactile feedback to the installer when connecting (or installing) the luminaire 60 to the track 70. Due to the tactile feedback, for example, the installer can know that the connector 13 of the luminaire 70 is close to the corresponding connection point relative to the track 70 when experiencing the tactile feedback of the at least one spacing element 15 (generated by the at least one spacing element 15 contacting the mounting surface 80).

[0085] Furthermore, the installer can more easily notice any skewed alignment of the luminaire 60 during installation. That is, in some contemplated examples, when the luminaire 60 is connected to the track 70 at a skewed angle relative to the mounting surface 80, the spacing length of a first spacing element 115 of the at least one spacing element 15 can be adjusted (i.e., deformed or contracted) before another second spacing element 215 of the at least one spacing element 15. This can enable the installer to experience a greater (reaction) force at the location of the first spacing element 115 before the second spacing element 215, and thus receive tactile feedback that the luminaire 60 may be misaligned relative to the mounting surface 80.

[0086] Figure 3A and Figure 3B An embodiment of a track lighting system 300 according to the invention is schematically depicted by way of non-limiting example. The track lighting system 300 comprises a luminaire 310 and a track 320. The luminaire 310 is configured to be connected to said track 320 mechanically and / or electrically. Figure 3A A side view of a first situation I and a second situation II are depicted, in which the luminaire 310 is to be connected to the rail 320 and in which the luminaire 310 is connected to the rail 320. In addition, Figure 2B The embodiment is schematically depicted in a top view by way of non-limiting example.

[0087] The track lighting system 300 comprises a luminaire 310 and a track 320. The track 320 is mounted to a mounting surface 330. The track 320 is thus recessed into the mounting surface 330. Alternatively, the track may be mounted on the mounting surface. The track 320 may be described as a power track. The track may comprise a cathode track and an anode track for powering the luminaire 310. The principles of track lighting systems are known in the art.

[0088] The illuminator 310 according to the present invention comprises a rear surface 31 and a planar light exit window 32. The planar light exit window 32 transmits light in operation. In many aspects, the rear surface 31 may also be substantially flat, but this is not necessary. When the illuminator 310 is connected to the track 320, the rear surface 31 faces the track 320, and thus faces the mounting surface 330. The planar light exit window 32 is arranged relative to the rear surface 31. In the present embodiment, the illuminator 310 is a light panel. Alternatively, the illuminator may be an elongated light bar. The illuminator 310 (i.e., the light panel) comprises a square light exit window 32. The rear surface 31 of the illuminator 310 comprises a profile 37, wherein the profile 37 of the rear surface 31 is also square. Alternatively, such a profile may be a rectangle, a triangle, a polygon, a circle, a star, an ellipse, a free form, or at least one combination of these shapes. For example, a rectangle with rounded corners.

[0089] Still see Figure 3A and Figure 3B , the illuminator 310 includes a connector 33. The connector 33 is connected to the rear surface 31 and protrudes a connector length 34 away from the rear surface 31. Here, the connector length 34 is defined in a direction perpendicular to the planar light exit window 32. Therefore, the connector length 34 is defined as the shortest distance between the position where the connector 33 (is connected and) protrudes away from the rear surface 31 and the (freely extended) farthest point of the connector 33. The connector 33 is configured to mechanically and electrically connect the illuminator 310 to the track 320. This connection is known in the art. In the present embodiment, the connector 13 is fixed, but alternatively the connector length may be adjustable.

[0090] According to the invention, the luminaire 310 further comprises at least one spacing element 35. The at least one spacing element 35 is connected to the rear surface 31 and projects away from the rear surface 31 by a spacing length 36, 38. The spacing length 36, 38 is also defined in a direction perpendicular to the planar light exit window 32.

[0091] As mentioned, the at least one spacing element 15 is connected to the rear surface 31 and protrudes away from the rear surface 31 by a spacing length 36, 38. More specifically, the at least one spacing element 35 is a bendable metal plate, such as a leaf spring assembly.

[0092] Therefore, the at least one spacing element 35 includes a base 351 connected to the rear surface 31, a top 352, and a body 353 extending between the base 351 and the top 352. The body 353 includes a leaf spring. The base 351 is divided between the first foot base and the second foot base, and the leaf spring 353 spans between the first foot base and the second foot base. Here, the top 352 is the farthest edge or surface portion extending away from the base 351 of the bendable metal plate 35. When the luminaire 310 is connected to the track 320, the at least one spacing element 35 (especially the top 352 here) contacts (or is configured to contact) the mounting surface 330. See the case referred to as II. Although optionally, the top 352 of the at least one spacing element 35 includes rubber or fabric. Therefore, when the luminaire 310 is connected to the track 330, the top 352 will not damage the mounting surface 330 by the contact.

[0093] Still see Figure 3A and Figure 3B , the depicted embodiment is characterized in that the at least one spacing element 35 is adjustable, i.e. the at least one spacing element 35 is adjustable from a first spacing length 36 to a second spacing length 38. The body 353 of the at least one spacing element 35 is configured to deform elastically when a force is applied. Thus, the body 353 of the at least one spacing element 35 (i.e. the leaf spring) is configured to deform elastically when a force is applied (common to leaf springs).

[0094] Thus, by controlling the force on the tip 352, the spacing length of the at least one spacing element 35 can be adjusted from the first spacing length 36 to the second spacing length 38. In various aspects, the second spacing length 38 can be at most 1 / 1.2 of the first spacing length 36.

[0095] That is, in the present embodiment, when the luminaire 310 is connected to the rail 320, when the at least one spacing element 35 contacts the mounting surface 330, the force is derived from the reaction force of the mounting surface 330 acting on the top end 352. Therefore, when the luminaire 310 is connected to the rail 320, when the top end 352 is forced toward the base 351, the leaf spring of the body 353 is compressed. Therefore, by forcing the top end 352 toward the base 351, the spacing length of the at least one spacing element 35 can be adjusted from the first spacing length 36 to the second spacing length 38. Therefore, the second spacing length 38 is shorter than the first spacing length 36.

[0096] Here, see Figure 3B, the at least one spacing element 35 is composed of a second spacing element 235 and a first spacing element 135 connected to the rear surface 31. The rear surface 31 includes a geometric center 333. The connector 13 is arranged at the geometric center 333. The first spacing element 135 and the second spacing element 235 are arranged opposite to each other on the rear surface 31. The first spacing element 135 and the second spacing element 235 are symmetrical to each other with respect to a symmetry plane 339 passing through the geometric center 333. Therefore, at least one spacing element 35 (i.e., the first spacing element 135 and the second spacing element 235) is arranged closer to the contour 37 of the rear surface 31 than the connector 33.

[0097] Alternatively, the luminaire may comprise one, three, or at least four spacing elements. Here, although optionally, at least one spacing element 35 may be detachably connected to the rear surface 31. Alternatively, the at least one spacing element may be integral with the rear surface, whereby the bendable metal plate and the associated leaf spring may be cut from a single piece of material constituting the rear surface.

[0098] Still see Figure 3A and Figure 3B , the luminaire 310 according to the present invention is configured to be connected to a (recessed) track 320. When the luminaire 310 is connected to the track 320, in case II as depicted, the connector 33 is electrically and mechanically connected to the track 320, and at least one spacing element 35 (its top end 352) contacts the mounting surface 330. This enables the luminaire 310 to be more ergonomically aligned with the mounting surface 330. Furthermore, after installation, when the connector 33 of the luminaire 310 is mechanically and electrically connected to the track 320, the at least one spacing element 35 contacts the mounting surface 330 at two corresponding positions. This will advantageously limit or inhibit the extent of at least one movement of the luminaire 310, in particular limit or inhibit the rotation (or tilting) of the luminaire 310, for example around the extension axis of the elongated track 320. The luminaire 310 can therefore be more stably fixed relative to the track 320 and relative to the mounting surface 330, because further rotation of the luminaire 310 around the geometric center 333 and the symmetry line 339 is inhibited. The force of the leaf spring will prevent this to a certain extent.This is particularly advantageous for large area luminaires (such as the light panel 310 depicted here).

[0099] Another advantage is that the at least one spacing element 35 is adjustable in spacing length from a first spacing length 36 to a second spacing length 38, which is caused by the elastic deformation of the leaf spring. When connecting the luminaire 310 to the track 320, the at least one spacing element 35 contacts the mounting surface 330 before the connector 33 is mechanically and electrically connected to the track 320. This can provide alignment, support and tactile feedback to the installer when connecting (or installing) the luminaire 310 to the track 320. Due to the tactile feedback, for example, the installer can know that the connector 33 of the luminaire 310 is close to the corresponding connection point relative to the track 320 when experiencing the tactile feedback of the at least one spacing element 35 (generated by the at least one spacing element 35 contacting the mounting surface 330).

[0100] Furthermore, the installer may more easily notice any skewed alignment of the luminaire 310 during installation. That is, in some contemplated examples, when the luminaire 310 is connected to the rail 320 at a skewed angle relative to the mounting surface 330, the spacing length of a first spacing element 135 of the at least one spacing element 35 may be adjusted (i.e., deformed or contracted) before another second spacing element 235 of the at least one spacing element 35. This may enable the installer to experience a greater (reaction) force at the location of the first spacing element 135 before the second spacing element 235, thereby receiving tactile feedback that the luminaire 310 may be misaligned relative to the mounting surface 330.

[0101] Figure 4A and 4B An embodiment of a track lighting system 400 according to the invention is schematically depicted by way of non-limiting example. The track lighting system 400 comprises a luminaire 410 and a track 420. The luminaire 410 is configured to be connected to said track 420 mechanically and / or electrically. Figure 4A A side view of a first situation I in which the luminaire 410 is to be connected to the rail 420 and a second situation II in which the luminaire 410 is connected to the rail 420 are depicted. In addition, Figure 2B The embodiment is schematically depicted in a top view by way of non-limiting example.

[0102] The track lighting system 400 comprises a luminaire 410 and a track 420. The track 420 is mounted to a mounting surface 430. The track 420 is thus recessed into the mounting surface 430. Alternatively, the track may be mounted on the mounting surface. The track 420 may be described as a power track. The track may comprise a cathode track and an anode track for powering the luminaire 410. The principles of track lighting systems are known in the art.

[0103] The luminaire 410 according to the present invention comprises a rear surface 41 and a plane light exit window 42. The plane light exit window 42 transmits light in operation. In many aspects, the rear surface 41 may also be substantially flat, but this is not necessary. Here, as an example, the rear surface 41 comprises a slightly curved surface. When the luminaire 410 is connected to the track 420, the rear surface 41 faces the track 420 and thus faces the mounting surface 430. The plane light exit window 42 is arranged opposite to the rear surface 41. Therefore, the plane light exit window 42 can be used as a reference plane.

[0104] In the present embodiment, the illuminator 410 is an elongated light bar. Alternatively, the illuminator may be an elongated light panel. The illuminator 410 (i.e., the light bar) comprises a rectangular light exit window 42 having a relatively high aspect ratio (ratio of length to width). For example, the length may be at least 10 times the width and / or the height. The rear surface 41 of the illuminator 410 comprises a profile 47, wherein the profile 47 of the rear surface 41 is also rectangular.

[0105] Still see Figure 4A and Figure 4B , the illuminator 410 includes a connector 43. The connector 43 is connected to the rear surface 41 and protrudes a connector length 44 away from the rear surface 41. Here, the connector length 44 is defined in a direction perpendicular to the planar light exit window 42. Therefore, the connector length 44 is defined as the shortest distance between the position where the connector 43 (is connected and) protrudes away from the rear surface 41 and the (freely extended) farthest point of the connector 43. The connector 43 is configured to mechanically and electrically connect the illuminator 410 to the track 420. This connection is known in the art. In the present embodiment, the connector 43 is fixed, but alternatively its connector length is adjustable.

[0106] According to the invention, the luminaire 410 further comprises at least one spacing element 45. The at least one spacing element 45 is connected to the rear surface 41 and protrudes away from the rear surface 41 by a spacing length 46, 48. The spacing length 46, 48 is also defined in a direction perpendicular to the planar light exit window 42.

[0107] As mentioned, at least one spacing element 45 is connected to the rear surface 41 and protrudes away from the rear surface 41 by a spacing length 46, 48. The at least one spacing element 45 includes a base 451 connected to the rear surface 41, a top 452, and a body 453 extending between the base 451 and the top 452. The body 453 is configured to plastically deform when a force is applied. When the luminaire 410 is connected to the track 420, the at least one spacing element 45 (here in particular the top 452) contacts (or is configured to contact) the mounting surface 430. See the situation referred to as II.

[0108] Although optional, the top end 452 of at least one of the spacing elements 45 comprises rubber or fabric. Therefore, when the luminaire 410 is connected to the track 430, the top end 452 does not damage the mounting surface 430 by the contact.

[0109] Still see Figure 3A and Figure 3B , the depicted embodiment is characterized in that the at least one spacing element 45 is adjustable, i.e., the at least one spacing element 45 is adjustable from a first spacing length 46 to a second spacing length 48. That is, the body 453 of the at least one spacing element 45 is configured to plastically deform when subjected to a force. The body 453 may, for example, include a plastically deformable polymer, a plastically deformable metal, or a plastically deformable metal structure. By controlling the force on the tip 452, the spacing length can be adjusted from the first spacing length 46 to the second spacing length 48.

[0110] Thus, by controlling the force on the tip 452 , the spacing length of the at least one spacing element 45 may be adjusted from the first spacing length 46 to the second spacing length 48 .

[0111] That is, in the present embodiment, when the luminaire 410 is connected to the track 420, when the at least one spacing element 45 contacts the mounting surface 430, the force is derived from the reaction force of the mounting surface 430 acting on the top end 452. Therefore, when the luminaire 410 is connected to the track 420, when the top end 452 is forced toward the base 451, the plastically deformable body 453 is compressed. Therefore, by forcing the top end 452 toward the base 451, the spacing length of the at least one spacing element 45 can be adjusted from the first spacing length 46 to the second spacing length 48. Therefore, the second spacing length 48 is shorter than the first spacing length 46.

[0112] In the present embodiment, although alternatively, the second interval length 48 is at most 1 / 1.2 of the first interval length 46, and the second interval length 48 is at least 1 / 2.4 of the first interval length 46. Therefore, the plastic deformation may include a limit.

[0113] Here, see Figure 4B , the at least one spacing element 45 consists of only one spacing element 45. Here, as an example, the rear surface 41 of the light bar 410 includes a geometric center 433. The connector 43 is arranged on one side of the geometric center 433, and one spacing element 45 is arranged on the other side (diametrically opposite) of the geometric center 433. So roughly speaking, one end of the elongated light bar 410 includes the connector 43, and the other end of the elongated light bar 410 includes at least one spacing element 45.

[0114] Still see Figure 4A and Figure 4B , the luminaire 410 according to the invention is configured to be connected to a (recessed) track 420. When the luminaire 410 is connected to the track 420, in case II as depicted, the connector 43 is electrically and mechanically connected to the track 420, and at least one spacing element 45 (its top end 452) contacts the mounting surface 430. After installation, when the connector 43 of the luminaire 410 is mechanically and electrically connected to the track 420, the at least one spacing element 45 contacts the mounting surface 430 at two corresponding positions. This will advantageously limit or inhibit the extent of at least one movement of the luminaire 410, in particular the rotation (or tilting) of the luminaire 410, for example here about the extension axis of the elongated track 420. The luminaire 410 can thus be fixed more stably relative to the track 420 and relative to the mounting surface 430, because the rotation of the luminaire 410 towards the mounting surface 430 is inhibited. As depicted in case II, the plastically deformed spacing element 45 will inhibit this to a certain extent. This is particularly advantageous for large area luminaires, such as the light bar 410 depicted herein.

[0115] Another advantage is that the at least one spacing element 45 is adjustable in spacing length from a first spacing length 46 to a second spacing length 48, which is caused by the plastic deformation of the body 453. When connecting the luminaire 410 to the track 420, the at least one spacing element 45 contacts the mounting surface 430 before the connector 43 is mechanically and electrically connected to the track 420. This can provide alignment, support, and tactile feedback to the installer when connecting (or installing) the luminaire 410 to the track 420. Due to the tactile feedback, for example, the installer can know that the connector 43 of the luminaire 410 is close to the corresponding connection point relative to the track 420 when experiencing the tactile feedback of the at least one spacing element 45 (generated by the at least one spacing element 45 contacting the mounting surface 430).

[0116] Figure 5 A luminaire 500 according to the present invention is schematically depicted by way of non-limiting example, wherein the luminaire 500 comprises a rear surface 501. The rear surface 501 is configured to face a track of a track lighting system when the luminaire 500 is connected to the track. The luminaire 500 may be connected to a track of a track lighting system, as depicted in FIGS. 1 to 4 .

[0117] The luminaire 500 further comprises a planar light exit window 502, a connector 503 and at least one spacer element 505. The planar light exit window 502 is arranged opposite to the rear surface 501. Here, the luminaire 500 is a (large area) light panel. The connector 503 is connected to the rear surface 501 and protrudes a connector length 504 away from the rear surface 501. Here, the connector length 504 is fixed, but alternatively it can be adjusted from a first connector length to a second connector length. The connector 503 is configured to mechanically and electrically connect the luminaire to the track of a track lighting system. For example, a track lighting system as shown in Figures 1 to 4.

[0118] At least one spacing element 505 is also connected to the rear surface 501 and projects away from the rear surface 501 by a spacing length 506, 508. The at least one spacing element 505 is configured to contact the mounting surface when the luminaire 500 is connected to the track.

[0119] Still see Figure 5 , the interval lengths 506, 508 can be adjusted from a first interval length 506 to a second interval length 508, and vice versa. Figure 5 A first spacing element 505 at a first spacing length 506 and a second spacing element 505 at a second spacing length 508 are depicted, the two spacing elements 505 being identical.

[0120] The at least one spacing element 505 thus comprises a base 5051 connected to the rear surface 501 , a top end 5052 configured to contact the mounting surface when the luminaire 500 is connected to the track, and a body 5053 extending between the base 5051 and the top end 5052 .

[0121] More specifically, here, the body 5053 includes a socket 5153 and a rod 5353, the socket 5153 includes an internal thread 5253, and the rod 5353 includes an external thread 5453. The rod 5353 is coaxial with the socket 5153. The external thread 5453 of the rod 5353 engages with the internal thread 5253 of the socket 5153. The rod 5353 is thus configured to move in a direction toward the base 5051 by rotating the rod 5353 in a first rotational direction within the socket 5153. The rod 5353 is thus configured to move in a direction away from the base 5051 by rotating the rod 5353 in a second rotational direction 5555 within the socket 5153. The second rotational direction 5555 is opposite to the first rotational direction. Therefore, for a first rotational direction (e.g., clockwise), the second rotational direction 5555 will be counterclockwise. The spacing lengths 506 , 508 are therefore adjustable from a first spacing length 506 to a second spacing length 508 by rotating the rod 5353 within the socket 5153 .

[0122] Although optionally, the top end 5052 of at least one of the spacing elements 505 comprises rubber or fabric. Thus, when the luminaire 500 is connected to the track, the top end 5052 does not damage the mounting surface by the contact.

[0123] Since the spacing length of the at least one spacing element 505 can be adjusted from the first spacing length 506 to the second spacing length 508, or vice versa, the at least one spacing element 505 can be customized to align the contact point of the luminaire 500 with the mounting surface. When the luminaire 500 is connected to the track 502 using the connector 503, the at least one spacing element 505 contacts the mounting surface, or can be adjusted to contact the mounting surface. This enables alignment and support.

[0124] Figure 6 An embodiment of a track lighting system 600 according to the present invention is schematically depicted by way of non-limiting example. The track lighting system 600 comprises a luminaire 610 and a track 620. The luminaire 610 is configured to be mechanically and / or electrically connected to the track 620. The track 620 is mounted to a mounting surface 630. The track 620 is thus mounted on the mounting surface 630. Alternatively, the track may be at least partially recessed into the mounting surface. The track 20 may be described as a power track. The track may comprise a cathode track and an anode track for powering the luminaire 10. The principles of track lighting systems are known in the art.

[0125] The luminaire 610 according to the present invention comprises a rear surface 601 and a planar light exit window 602. In operation, the planar light exit window 602 transmits light. In many aspects, the rear surface can also be substantially flat, but this is not required. When the luminaire 610 is connected to the track 620, the rear surface 601 faces the track 620 and thus faces the mounting surface 630. The planar light exit window 602 is arranged opposite to the rear surface 601. In the present embodiment, the luminaire 610 is a light panel. Alternatively, the luminaire can be an elongated light bar.

[0126] Still see Figure 6 , the luminaire 610 includes a connector 603. The connector 603 is connected to the rear surface 601 and protrudes away from the rear surface 601 by a connector length 604, 608. Here, the connector length 604, 608 is defined in a direction perpendicular to the planar light exit window 602. The connector 603 is configured to mechanically and electrically connect the luminaire 610 to the track 620.

[0127] Furthermore, the illuminator 610 comprises at least one spacing element 605. The at least one spacing element 605 is connected to the rear surface 601 and protrudes away from the rear surface 601 by a spacing length 606. The spacing length 606 is also defined in a direction perpendicular to the planar light exit window 602. Here, the at least one spacing element 605 is, for example, a rod element with a fixed spacing length. The at least one spacing element 605 can be detachably connected to the rear surface 601. Alternatively, the at least one spacing element 605 can be a spacing element according to the present invention, for example, as previously described in FIGS. Figure 5 The spacer element mentioned in .

[0128] Still see Figure 6 , the rear surface 601 includes a geometric center. The connector 603 is arranged at the geometric center. Alternatively, the connector can be offset relative to the geometric center. At least one spacing element 605 is arranged around the geometric center and around the connector 603 at an edge area of ​​the light panel 610.

[0129] According to the present invention, the connector 603 comprises adjustable connector lengths 604, 608. That is, the connector length is adjustable from a first connector length 604 to a second connector length 608. Here, in this example as depicted, the first connector length 604 protrudes further away from the rear surface 601 than the at least one spacing element 605.

[0130] More specifically, the connector 603 includes a foot 6031 connected to the rear surface 601, a head 6032 configured to mechanically and electrically connect the illuminator 610 to the track 620, and an extendable member 6033 extending between the foot 6031 and the head 6032. The extendable member 6033 includes a spring lock (mechanism) configured to switch between a locked state and a released state. Such a spring lock or spring lock mechanism is also known in the art. Therefore, in the locked state, the connector 603 has a first connector length 604; and in the released state, the connector 603 has a second connector length 608. The second connector length 608 is shorter than the first connector length 604. As mentioned, the connector lengths 604, 608 are defined in a direction perpendicular to the planar light exit window 602, and can be considered as the shortest distance between the head 6032 and the rear surface 601. In various aspects, the second connector length 604 can be at most 1 / 1.2 of the first connector length 608.

[0131] Figure 6Depicted are a first situation I where the luminaire 610 is to be connected to the track 620, a second situation II where the luminaire 610 is connected to the track 620 via a connector, and a situation III where the connector 603 pulls the luminaire 610 toward the track 620 and the mounting surface 630 thereby adjusting the first connector length 604 to the second connector length 608.

[0132] Thus, when the luminaire 610 is connected to the track 620, in Case II and Case III, the connector 603 is not only electrically and mechanically connected to the track 620, but also pulls the luminaire toward the track 620 and the mounting surface 630 on which the track 620 is mounted, thus ensuring that at least one spacing element 605 contacts the mounting surface 630. This enables the luminaire 610 including such a spacing element 605 to be mounted to the mounting surface 30 more ergonomically.

[0133] Figure 7 A method of connecting a luminaire according to any of the aforementioned embodiments as depicted in Figures 1 to 6 to a track of a track lighting system, the track of which is mounted to a mounting surface, is schematically depicted by way of non-limiting example. The method 700 comprises a first step 701 of mechanically and electrically connecting the luminaire to said track. The method comprises a second step 702 of adjusting a first spacing length of the at least one spacing element to a second spacing length of the at least one spacing element.

Claims

1. A track lighting system, comprising: - a track, which is mounted to the mounting surface; - a luminaire configured to be connected to a track of a track lighting system, the track of the track lighting system being mounted to a mounting surface, wherein the luminaire comprises: - a rear surface facing the track when the luminaire is connected to said track; - a planar light exit window arranged opposite to said rear surface; - a connector connected to the rear surface and projecting away from the rear surface by a connector length, wherein the connector is configured to mechanically and electrically connect the luminaire to the track; - at least one spacing element connected to the rear surface and protruding a spacing length therefrom, wherein the at least one spacing element is configured to contact the mounting surface when the luminaire is connected to the track; Wherein the luminaire is mechanically and electrically connected to the track, wherein the at least one spacing element of the luminaire contacts the mounting surface when the luminaire is connected to the track.

2. The track lighting system according to claim 1, wherein: The spacing length of the at least one spacing element is adjustable from a first spacing length to a second spacing length.

3. The track lighting system according to claim 2, wherein: The at least one spacing element includes a base connected to the rear surface, a top end configured to contact the mounting surface when the luminaire is connected to the track, and a body extending between the base and the top end.

4. The track lighting system according to claim 3, wherein: The body is configured to elastically deform when subjected to force; Wherein, by controlling the force on the top end, the spacing length of the at least one spacing element can be adjusted from the first spacing length to the second spacing length.

5. The track lighting system according to claim 4, wherein: The body includes a spring configured to elastically deform when subjected to a force; The spacing length of the at least one spacing element can be adjusted from the first spacing length to the second spacing length by forcing the top end toward the base.

6. The track lighting system according to claim 4, wherein: The body includes rubber configured to elastically deform when subjected to a force; The spacing length of the at least one spacing element can be adjusted from the first spacing length to the second spacing length by forcing the top end toward the base.

7. The track lighting system according to claim 3, wherein: The body is configured to plastically deform when subjected to a force; Wherein, by controlling the force on the top end, the spacing length of the at least one spacing element can be adjusted from the first spacing length to the second spacing length.

8. A track lighting system according to any one of the preceding claims 2 to 7, wherein: The second interval length is shorter than the first interval length.

9. The track lighting system according to claim 3, wherein the body comprises: a socket including internal threads; and a rod including external threads; Wherein, the rod is coaxially arranged with the socket; wherein the external thread of the rod engages the internal thread of the socket; wherein the rod is configured to move in a direction toward the base by rotating the rod in a first rotational direction within the socket, and wherein the rod is configured to move in a direction away from the base by rotating the rod in a second rotational direction within the socket; wherein the second rotation direction is opposite to the first rotation direction; Wherein, the spacing length of the at least one spacing element can be adjusted from the first spacing length to the second spacing length by rotating the rod within the socket.

10. A track lighting system according to any one of the preceding claims 3 to 9, wherein: The top end comprises rubber or fabric.

11. Track lighting system according to any one of the preceding claims, wherein: The spacing length is defined in a direction perpendicular to the planar light exit window.

12. Track lighting system according to any one of the preceding claims, wherein: The rear surface includes a profile; Therein, the at least one spacing element is arranged closer to the contour than to the connector.

13. A track lighting system according to any one of the preceding claims, wherein: The connector length of the connector is adjustable from a first connector length to a second connector length.

14. The track lighting system according to claim 13, wherein: The connector includes: a foot connected to the rear surface; a head configured to mechanically and electrically connect the luminaire to the track; an extendable member extending between the foot and the head; wherein the extendable member comprises a spring lock configured to switch between a locked state and a released state; wherein, in the locked state, the connector has a first connector length; wherein, in the released state, the connector has the second connector length; Wherein, the length of the second connector is shorter than that of the first connector.

15. A luminaire configured to be connected to a track of a track lighting system, the track of the track lighting system being mounted to a mounting surface, wherein: The illuminator comprises: - a rear surface facing the track when the luminaire is connected to said track; - a planar light exit window arranged opposite to said rear surface; - a connector connected to the rear surface and projecting away from the rear surface by a connector length, wherein the connector is configured to mechanically and electrically connect the luminaire to the track; - at least one spacing element connected to the rear surface and protruding a spacing length therefrom, wherein the at least one spacing element is configured to contact the mounting surface when the luminaire is connected to the track; wherein the connector length of the connector is adjustable from a first connector length to a second connector length; Wherein, the connector comprises: a foot connected to the rear surface; a head configured to mechanically and electrically connect the luminaire to the track; an extendable member extending between the foot and the head; wherein the extendable member comprises a spring lock configured to switch between a locked state and a released state; wherein, in a locked state, the connector has a first connector length; wherein, in the released state, the connector has a second connector length; Wherein, the length of the second connector is shorter than that of the first connector.

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