Automotive lighting and / or signaling device

Abstract

A lighting and / or signaling device comprising: a light guide extending from a light incident and diffusing wall to a light exit wall producing a light emitting portion of the lighting and / or signaling device; at least one LED light source adapted to emit a light beam along a primary optical axis and facing the light emitting portion of the light incident and diffusing wall; wherein the incidence and diffusion wall and the light exit wall are opposite to each other along a primary optical axis; the light-emitting part comprises a middle light-emitting part and a peripheral light-emitting part; the light guide is provided with extraction elements arranged on the light incident and diffusion walls; wherein the device comprises at least one reflector element associated with the light incident and diffusing walls of the light guide and directly facing the respective extraction element so as to reflect light towards the light exit wall; wherein the diffusion layer is arranged to cover the light emitting portion on the light exit wall side; wherein a cylindrical optic is provided on the light exit wall at the intermediate light emitting portion, the cylindrical optic extracting an incident beam thereon towards the diffusion layer.

Description

[0001] This application is a divisional application of the application No. 201910378600.4, with the title of "Automotive Lighting and / or Signaling Device", filed with the State Intellectual Property Office on May 8, 2019. Technical Field

[0002] The present invention relates to an automotive lighting and / or signaling device. Background Art

[0003] The term "automotive lighting and / or signaling device" is used herein in a very broad sense so as to include rear and front automotive lamps, the latter also being known as headlamps or headlights.

[0004] Thus, it includes position lamps, direction indicators, parking lamps, rear fog lamps, reverse lamps, dipped beam headlamps, main beam headlamps, etc.

[0005] Furthermore, the term is also intended to include map lamps, lamps for the dashboard or a part thereof; thus, the automotive lighting and / or signaling device can be located inside and outside the vehicle.

[0006] As is known, the automotive lighting and / or signaling device can be used for lighting and for sending visual signals.

[0007] For these purposes, the device includes a plurality of light-emitting parts, which have different colors, different brightness levels, and also comply with the regulations to be observed, etc. However, automotive lamps are increasingly becoming a distinctive element of motor vehicles and, as a result, special attention is paid to their appearance. In this context, there is an increasing need to manufacture an automotive lighting and / or signaling device that ensures an increase in the uniformity of the light-emitting parts in order to meet appearance-related requirements in addition to functional needs.

[0008] For this purpose, there are solutions in the art with OLEDs that ensure an increase in the uniformity of the light-emitting parts; however, such solutions are very expensive and, in any case, have limitations in terms of life cycle and diagnosis in the event of a failure. Summary of the Invention

[0009] This latter limitation cannot be ignored because there is an increasing requirement in the art not only to use automotive lamps as instruments to meet type approval requirements in order to obtain a beam that complies with specific photometric requirements, but also to use automotive lamps as specific design instruments of the vehicle on which the lamps are applied.

[0010] Therefore, the lighting pattern emitted by the lamp not only serves to achieve the signal and / or lighting function, but also serves to produce an accurate desired light effect.

[0011] In addition, the lighting and / or signaling device can also be used to send optical signals such as text, graphic symbols, and is also used to create light animations produced by an exact sequence of illuminated portions.

[0012] Therefore, there is a need in the art to provide an automotive lighting and / or signaling device that is reasonably priced, more efficient than OLEDs and capable of ensuring enhanced lighting uniformity comparable to that obtained with OLEDs, but without the drawbacks of OLED technology.

[0013] This need is met by an automotive lighting and / or signaling device according to claim 1, said automotive lighting and / or signaling device comprising an optical waveguide that is illuminated from the back by an LED light source and is capable of providing an illumination surface without bright / dark spots.

[0014] Other embodiments of the invention are described in the dependent claims. Description of the Drawings

[0015] Further features and advantages of the invention will become more readily apparent from the following description of preferred non - limiting embodiments, in which:

[0016] - Figure 1 A perspective view of a lighting and / or signaling device according to an embodiment of the invention is depicted in an assembled view;

[0017] - Figure 2 A perspective view of the lighting and / or signaling device in Figure 1 is depicted in separated parts;

[0018] - Figure 3 A perspective view of certain components of the lighting and / or signaling device in Figure 1 is depicted;

[0019] - Figure 4 A front view of the lighting and / or signaling device in Figure 1 is depicted in an assembled configuration;

[0020] - Figure 5 A cross - sectional view of the lighting and / or signaling device in Figure 1 along the sectional plane V - V shown in Figure 4 is depicted;

[0021] - Figures 6a - 6d Cross - sectional views depicting details of lighting and / or signaling devices according to different embodiments of the invention are depicted;

[0022] - Figure 7 A plan view of a lighting and / or signaling module according to an embodiment of the invention is depicted;

[0023] - Figure 8 A depictionFigure 7 Cross-sectional view of the middle module;

[0024] - Figure 9 Plan view depicting a lighting and / or signaling module according to another embodiment of the present invention;

[0025] - Figure 10 Depict Figure 9 The module in Figure 9 Cross-sectional view of the module along the cross-sectional plane X-X shown in

[0026] The same reference numerals will be used to indicate elements or parts of elements common to the embodiments described later. Detailed description of the specific implementation

[0027] Referring to the foregoing drawings, 4 indicates a lighting and / or signaling device as a whole, such as an automotive lamp. The following disclosure relates to the lighting and / or signaling device, but is not general.

[0028] As described above, the term "lighting and / or signaling device" can indifferently mean a rear automotive lamp or a front automotive lamp, the latter also being called a headlamp or a headlight. The lighting and / or signaling device includes at least one external vehicle lamp that serves a lighting and / or signaling function, such as a position lamp, which can be a front position lamp, a rear position lamp, a side position lamp, a parking lamp, a rear fog lamp, a high beam headlamp, a low beam headlamp, etc. that can be a direction indicator.

[0029] In addition, the term "lighting and / or signaling device" also means a map lamp, a lamp for a dashboard or a part thereof, a display, etc.

[0030] Thus, as described better below, in its signaling function, the device can include the possibility of sending optical signals, identification, and any kind of text and optical messages.

[0031] The lighting and / or signaling device 4 includes a container body or housing 8 typically made of a polymeric material, which generally allows the lighting and / or signaling device 4 to be fastened to the relevant vehicle.

[0032] For the purposes of the present invention, the container body or housing 8 can have any shape and size and can also be positioned: for example, the container body 8 can not be directly connected to the vehicle body or other fasteners of the vehicle.

[0033] As shown, the container body 8 can also be connected inside the vehicle, for example, connected to the dashboard, connected to the instrument panel, connected to the cargo rack, etc.

[0034] The container body 8 defines a receiving seat 12 that houses a plurality of components of the lighting and / or signaling device, and particularly the LED light source 16.

[0035] The LED light source 16 emits a light beam diffused along the main optical axis X-X.

[0036] In other words, the LED light source 16 emits a light beam including a plurality of light rays arranged around the main optical axis X-X (preferably in an axially symmetric manner).

[0037] The container body 8 is connected to the lens body 20 so as to enclose the receiving seat 12 that houses at least one LED light source 16.

[0038] For the purposes of the present invention, the lens body 20 can be outside the lighting and / or signaling device 4 so as to define at least one outer wall of the lighting and / or signaling device in direct contact with the atmosphere.

[0039] The lens body 20 encloses the receiving seat 12 and is adapted to be penetrated by the light beam generated by the LED light source 16, and this light beam is transmitted to the outside of the receiving seat 12.

[0040] For this purpose, the lens body 20 is made of a material that is at least partially transparent or semi-transparent or translucent, and it can also include one or more opaque portions, which in any case allow the light beam generated by the light source to pass through at least partially.

[0041] According to a possible embodiment, the material of the lens body 20 is a resin such as PMMA, PC, etc.

[0042] A mask (not shown) for conveniently defining the light-emitting portion of the lighting and / or signaling device 4 can also be applied to the lens body 20.

[0043] The lighting and / or signaling device 4 includes an optical waveguide 24, and the optical waveguide 24 is located in the housing chamber defined by the enclosed container body and the lens body. This optical waveguide 24 extends from the light-incident and diffusing wall 28 adapted to receive the light beam to the light-emitting wall 32 that forms the light-emitting portion 36 of the device 4.

[0044] The light-incident and diffusing wall 28 and the light-emitting wall 32 are opposite to each other along the main optical axis X.

[0045] The LED light source 16 faces the light-emitting portion 40 of the light-incident and diffusing wall 28 (referred to as incoupling in the terminology). The light emitted by the LED light source 16 can thus enter the optical waveguide 24 through the light-emitting portion 40, so as to be transmitted by total internal reflection between the light-incident and diffusing wall 28 and the light-emitting wall 32.

[0046] The light-emitting part 36 includes an intermediate light-emitting part 44 aligned with the LED light source 16 and the light-emitting part 40, and a peripheral light-emitting part 48 surrounding the intermediate light-emitting part 44. Preferably, the light-emitting part 36 is axially symmetric with respect to the main optical axis X-X of the LED light source 16.

[0047] In addition to the light-emitting part 40, the light guide 24 is provided with extraction elements 52 arranged on the light-incident and diffusing wall 28 at the peripheral light-emitting part 48.

[0048] According to one embodiment, the extraction element 52 is a micro-optical device that directly or indirectly diffuses light towards the light-emitting wall 32.

[0049] For example, the extraction element 52 may include dot-like micro-optical devices and / or concentric grooves.

[0050] Preferably, the extraction elements 52 are arranged according to a non-uniform pattern having a density that increases as the distance from the corresponding LED light source 16 increases along the radial direction R, and the extraction elements 52 are contained in a plane perpendicular to the main optical axis X-X and incident on by the main optical axis X-X.

[0051] Furthermore, the lighting and / or signaling device 4 includes at least one reflector element 56, the at least one reflector element 56 being associated with the light-incident and diffusing wall 28 of the light guide 24 and directly facing the corresponding extraction element 52 in order to reflect light towards the light-emitting wall 32. More specifically, the extraction element 52 may be configured to direct light towards the reflector element 56 such that it can reflect the light towards the light-emitting wall 32 in a more uniform manner. Alternatively, in an alternative embodiment, the extraction element 52 may be configured to direct light directly towards the light-emitting wall 32, where the reflector element 56 is ready to recover the light lost by the extraction element 52 in the opposite direction.

[0052] According to a possible embodiment, the reflector element 56 is a white film ( Figure 6a , Figure 6c , Figure 6d ) or a mirror ( Figure 6b ) that reflects light from the light-incident and diffusing wall 28 of the light guide 24.

[0053] The reflector element 56 may be placed at a predetermined distance with respect to the light-incident and diffusing wall 28 in order to form a gap between the two elements. Such a design can improve the mixing of the light reflected by the reflector element 56. However, such a gap can be minimized until it is eliminated in order to reduce the thickness of the lighting and / or signaling device 4, i.e., the distance between the light-incident wall 28 and the emitting wall 32.

[0054] Advantageously, the diffuser layer 60 or the opalescent or embossed layer is arranged to cover the light-emitting portion 36 on the side of the light-emitting wall 32, as described better below.

[0055] Advantageously, the diffuser layer 60 has different transmission factors according to the light intensity of the incident light rays on the light-emitting portion 36, so as to obtain a uniform light intensity across the light-emitting portion 36 itself.

[0056] In other words, the light-emitting wall 32 includes means for changing the transmission factor, such as the diffuser layer 60, to selectively change the transmission factor of the light beam along the light-emitting wall 32, so as to balance, equalize, homogenize, and make uniform the light intensity (brightness) of the intermediate light-emitting portion 44 and the peripheral light-emitting portion 48 of the light-emitting wall 32.

[0057] Specifically, according to one embodiment, where the incident light rays have a strong light intensity on the light-emitting portion, the diffuser layer 60 has a smaller transmission coefficient, and where the incident light rays have a smaller light intensity on the light-emitting portion 36, the diffuser layer 60 has a larger transmission coefficient.

[0058] According to one embodiment, the diffuser layer 60 has a smaller transmission coefficient at the intermediate light-emitting portion 44 and a larger transmission coefficient at the peripheral light-emitting portion 48.

[0059] According to a possible embodiment, the diffuser layer 60 includes an opalescent layer, and the change in the transmission factor is obtained by the change in the thickness S of the opalescent layer with respect to a cross-sectional plane parallel to the main optical axis X-X of the LED light source 16.

[0060] According to a variant, the change in the transmission factor of the opalescent layer can be obtained by changing the density and / or size of the scattering particles of the opalescent material.

[0061] Preferably, the thickness S of the opalescent layer is larger at the intermediate light-emitting portion 44 and smaller at the peripheral light-emitting portion 48.

[0062] According to another possible embodiment, the diffuser layer 60 includes an embossed layer, and the change in the transmission factor is obtained by the change in the embossing density / roughness and / or thickness S of the embossed layer with respect to a cross-sectional plane parallel to the main optical axis X-X of the LED light source 16.

[0063] Preferably, the thickness S and / or the embossing density of the embossed layer are larger at the intermediate light-emitting portion 44 and smaller at the peripheral light-emitting portion 48.

[0064] According to another possible embodiment, the diffuser layer may include a screen-printed layer, and the change in the transmission factor can be obtained by different patterns.

[0065] According to a possible embodiment, a cylindrical optical device 64 is provided at the LED light source 16 at the light-emitting wall 32, and the cylindrical optical device 64 extracts the incident light rays thereon towards the diffusing layer 60.

[0066] For example, the cylindrical optical device 64 is a cylindrical path / groove / projection, which are concentric with each other with respect to the main optical axis X-X of the LED light source 16.

[0067] Preferably, the cylindrical optical device 64 is arranged at the middle light-emitting part 44 of the light-emitting wall 32. Thus, the middle light-emitting part 44 of the light-emitting wall 32 provided with such a cylindrical optical device 64 eliminates the dual function of reflecting light inside the light guide 24, thus satisfying the condition of total internal reflection, and at the same time preferably but not necessarily, extracts light from the light guide 24 along a direction parallel to the main optical axis X-X of the LED light source.

[0068] According to an embodiment, the cylindrical optical device 64 on the light-emitting wall 32 is configured in relation to the extraction element 52 on the light-incident and diffusing wall 28 so as to extract light rays with generally equal light intensity on the light-emitting part 36, thereby obtaining uniform illumination.

[0069] For the purpose of the present invention, the light-emitting part 40 directly facing the LED light source 16 may present a specific geometric shape.

[0070] Preferably, the transmission part has a recess, for example, a geometric shape with a spherical cap, which is recessed towards the LED light source 16. The light guide 24 has a tapered part 68 on the side of the light-emitting wall 32 at the light-emitting part 40, which is axisymmetric with respect to the main optical axis X-X of the LED light source 16 and has a vertex V facing the light-emitting part 40 and aligned with the LED light source 16.

[0071] Preferably, the diffusing layer 60 has a planar peripheral part 72 and a tapered intermediate protrusion 76, and the tapered intermediate protrusion 76 has a reverse shape with respect to the tapered part 68 of the light guide 24.

[0072] According to a possible embodiment, with respect to a cross-sectional plane parallel to the main optical axis X-X of the LED light source 16, the light-emitting part 40 of the light-incident and diffusing wall 28 includes:

[0073] - A first lower stretching part 80, which is shaped to deflect / refract light rays forming a first angle α (which is preferably less than 50°) such that they can affect the tapered part 68 of the light-emitting wall 32 and be reflected by the latter, i.e., the tapered part 68 of the light-emitting wall 32, by total internal reflection along a part of the light guide 24 defined by the light-incident wall 28 and the light-emitting wall 32.

[0074] - A second lower stretching part 88 adjacent to the first lower stretching part 80, which is configured to direct light rays emitted at an angle greater than a first angle α and less than a second angle β (which is less than 81°) towards a part of the light-emitting wall 32 adjacent to the conical part 68, such that they can be reflected by total internal reflection along a part of the light guide 24 defined by the light-incident wall 28 and the light-emitting wall 32.

[0075] - A third lower stretching part 92 adjacent to the second lower stretching part 88, which is configured not to reflect the light rays refracted from the second lower stretching part 88.

[0076] According to one embodiment, the extraction element 52 and the reflector element 56 are arranged from a fourth lower stretching part 96 adjacent to the third lower stretching part 92.

[0077] In one embodiment, the reflector element 56 of the electronic board supporting the LED light source 16 has a white coloring or a coating similar to one of the thin films or layers.

[0078] The above description relates to a single signal and / or lighting device 4; in fact, the device can in turn be obtained by placing a plurality of lighting and / or signal devices together, each lighting and / or signal device being illuminated by a corresponding LED light source 16.

[0079] In other words, a lighting and / or signal module 104 can be manufactured, which includes a plurality of lighting and / or signal devices 4', 4", wherein the light-emitting parts 36', 36" of the mutually adjacent devices 4', 4" are separated by a barrier element 100 that is opaque to the light rays of each light beam emitted by the corresponding LED light sources 16', 16".

[0080] For example, the reflector element 56 of the lighting and / or signal device also acts as the barrier element 100 at the lighting and / or mutually adjacent signal devices 4', 4" placed together.

[0081] According to a possible variant, the barrier element 100 includes a thin film opaque to light and / or a separator spacer opaque to light.

[0082] The barrier element 100 can also be co-molded with the reflector element 56.

[0083] It is also worth noting that the shape and size of the light guides 24', 24" can vary; the number of light guides can be greater than two, and the light guides 24', 24" can be arranged to form light-emitting parts 36', 36" having any shape and extension such as Figures 7 to 10 as shown.

[0084] Thus, different light-emitting portions can be turned on, or the quantity can be increased (far exceeding two units) in order to produce possible optical effects, or else in order to create, with said light-emitting portions, texts, signs, messages that can have other functions associated with traditional lighting devices.

[0085] Thus, the lighting device 4 also becomes an image-forming device. For this purpose, the light guide 24 can be shaped and arranged to have light-emitting portions arranged according to different geometric patterns: thus, an alphanumeric code including digits and letters of the alphabet can be composed.

[0086] Obviously, due to the individual control of the corresponding LED light sources, a suitable sequence for turning on the respective light-emitting portions will allow specific graphic effects, texts, and also various types of animations to be obtained according to user needs.

[0087] Due to the implementation of the diffusing layer 60, the final technical effect is that the light beams emitted by the light-emitting portions of the lighting and / or signaling device are further homogenized to obtain a lighting uniformity that is exactly equivalent to the lighting uniformity that can be obtained with OLED technology.

[0088] As can be noted from what has been described, the present invention allows the drawbacks presented in the prior art to be overcome.

[0089] Specifically, the automotive lighting and / or signaling device according to the present invention allows any predetermined light pattern provided with portions having any brightness level to be obtained, capable of eliminating all photometric specifications of the lamp, but also capable of emitting light, any type of graphic signal, so as to become, in addition to a light signal and a lighting instrument, an instrument for transmitting information.

[0090] Furthermore, the lighting and / or signaling device according to the present invention allows any animation to be obtained by means of a controlled activation according to a predetermined sequence of the light-emitting portions of the light guide.

[0091] Furthermore, the various light-emitting portions have a certain level of uniformity that is exactly equivalent to the uniformity that can be obtained using OLED technology, while significantly reducing complexity and cost with respect to the latter technology.

[0092] Furthermore, the lighting and / or signaling device of the present invention has a significantly reduced depth, so that they are suitable for themselves for internal and external vehicle applications; furthermore, since they do not require modification of the structure in which they are placed and they do not require a particularly deep housing, the reduced thickness facilitates positioning in various locations.

[0093] The lighting and / or signaling device of the present invention can be planar and curved, and thus they are suitable for being positioned at any point, since they can be easily integrated into the curves of the body and / or the dashboard without any difficulty.

[0094] In fact, there is no limitation on the geometry or pattern or shape of the luminous part that can be obtained.

[0095] The lighting patterns are also characterized by a significant homogenization and uniformity of the light beam diffused outside the device.

[0096] Thus, thanks to the present invention, it is possible to obtain a light pattern, i.e., any illuminated surface, i.e., having any geometry, while maintaining an increased energy efficiency and lighting uniformity of the pattern itself.

[0097] The solution is easy to manufacture and has a limited cost, weight and volume.

[0098] To meet possible and specific needs, those skilled in the art can make several changes and variations to the above lighting and / or signaling devices, all of which are included within the scope of the present invention, the scope of which is defined by the following claims.

Claims

1. A lighting and / or signaling device, comprising: - An optical waveguide extending from a light-incident and diffusing wall to a light-emitting wall, the light-incident and diffusing wall being adapted to receive and diffuse a light beam, and the light-emitting wall generating a light-emitting part of the lighting and / or signaling device; - At least one LED light source adapted to emit a light beam along a main optical axis and facing a light-emitting part of the light-incident and diffusing wall adapted to receive the light beam emitted by the LED light source; - Wherein the incident and diffusing wall and the light-emitting wall are opposite to each other along the main optical axis; - The light-emitting part includes an intermediate light-emitting part aligned with the LED light source and the light-emitting part, and a peripheral light-emitting part surrounding the intermediate light-emitting part; - The optical waveguide is provided with extraction elements arranged on the light-incident and diffusing wall, the extraction elements being dot-shaped micro-optical devices that diffuse light towards the light-emitting wall and / or towards a reflector element, and the optical waveguide is also provided with a plurality of cylindrical optical devices at the intermediate light-emitting part on the light-emitting wall; - At least one reflector element is spaced apart from the optical waveguide but associated with the light-incident and diffusing wall of the optical waveguide and directly faces the corresponding extraction element so as to reflect light towards the light-emitting wall; - Wherein a diffusing layer is arranged to cover the light-emitting part on the side of the light-emitting wall, and wherein the diffusing layer has different transmission coefficients according to the light intensity of the incident light rays on the light-emitting part so as to obtain a uniform light intensity on both the intermediate light-emitting part and the peripheral light-emitting part; And - Wherein the plurality of cylindrical optical devices define cylindrical paths that are concentric with each other with respect to the main optical axis of the LED light source and extract the incident light beam thereon towards the diffusing layer.

2. The lighting and / or signaling device according to claim 1, characterized in that The plurality of cylindrical optical devices on the light-emitting wall are configured in relation to the extraction elements on the light-incident and diffusing wall so as to extract light rays with generally equal light intensity on the light-emitting part.

3. The lighting and / or signalling device according to claim 1, characterised in that The diffusing layer has a smaller transmission coefficient at the intermediate light-emitting part and a larger transmission coefficient at the peripheral light-emitting part.

4. The lighting and / or signalling device according to claim 1, characterised in that The diffusing layer includes an opalescent layer, and the change in the transmission factor is obtained by changing the thickness of the opalescent layer with respect to a cross-sectional plane parallel to the main optical axis of the LED light source.

5. The lighting and / or signalling device according to claim 4, characterised in that The thickness of the opalescent layer is larger at the intermediate light-emitting part and smaller at the peripheral light-emitting part.

6. The lighting and / or signaling device according to claim 1, characterized in that The diffusing layer includes a textured layer, and the change in the transmission factor is obtained by changing the texture density and / or thickness and / or roughness of the textured layer with respect to a cross-sectional plane parallel to the main optical axis of the LED light source.

7. The lighting and / or signaling device according to claim 6, characterized in that The thickness and / or the texture density and / or the roughness of the textured layer are larger at the intermediate light-emitting part and smaller at the peripheral light-emitting part.

8. The lighting and / or signalling device according to claim 1, characterised in that The diffusing layer includes a screen-printed layer, and the change in the transmission factor is obtained by different patterns of the screen-printed layer.

9. The lighting and / or signaling device according to claim 1, characterized in that The light-emitting part has a recess towards the LED light source, and wherein the intermediate light-emitting part has a conical part that is axially symmetric with respect to the main optical axis of the LED light source and has a vertex facing the light-emitting part and aligned with the LED light source.

10. The lighting and / or signaling device according to claim 9, characterized in that The diffusing layer has a planar peripheral part and a conical intermediate protrusion, and the conical intermediate protrusion has a reverse shape with respect to the conical part of the optical waveguide.

11. The lighting and / or signaling device according to claim 9, characterized in that Relative to a cross-sectional plane parallel to the main optical axis of the LED light source, the light-emitting part of the light-incident and diffusing wall comprises: - a first lower stretching part shaped to deflect / refract light rays forming a first angle so that they can affect the conical part of the light-emitting wall and be reflected by the latter, i.e., the conical part of the light-emitting wall, by total internal reflection along a part of the light guide defined by the light-incident wall and the light-emitting wall; - a second lower stretching part adjacent to the first lower stretching part, configured to direct light rays emitted at an angle greater than the first angle and less than a second angle so that they can be reflected by reflection along a part of the light guide defined by the light-incident wall and the light-emitting wall; - a third lower stretching part adjacent to the second lower stretching part, configured not to reflect the light rays refracted from the second lower stretching part.

12. The lighting and / or signaling device according to claim 11, characterized in that The extraction element is arranged from a fourth lower stretching part adjacent to the third lower stretching part.

13. The lighting and / or signalling device according to claim 1, characterised in that The extraction element is arranged according to a non-uniform pattern having a density that increases as the distance from the corresponding LED light source increases along the radial direction, and the extraction element is contained in a plane perpendicular to the main optical axis and incident by the main optical axis.

14. The lighting and / or signalling device according to claim 1, characterised in that The reflector element is a white film or a mirror that reflects the light from the light-incident and diffusing walls of the light guide.

15. An illumination and / or signaling module comprising a plurality of illumination and / or signaling devices according to claim 1, wherein the light-emitting parts of adjacent devices are separated by a barrier element opaque to light rays.

16. The lighting and / or signaling module according to claim 15, characterized in that The reflector element of the device also acts as a barrier element at adjacent illumination devices placed together.

17. The lighting and / or signaling module according to claim 15, characterized in that The barrier element comprises a film opaque to light and / or a separator spacer.

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