FR3067443A1 - LIGHTING DEVICE FOR VEHICLE, AND ASSOCIATED HAY - Google Patents

Abstract

Lighting device (1) for a vehicle, having a first light emitter (2) configured to emit light in a first direction, a second light emitter (3) configured to emit light in a second direction , an outer cover (7), a reflector (5), a light pipe (4) which transmits the light emitted by said first light emitter (2) to the outer cover (7), and the reflector (5) directs the light emitted from the second light emitter (3) to the outer cover (7), so that the first light emission direction and the second light emission direction are substantially different. With the foregoing, the lighting synergies are increased, in particular by performing two functions in the same zone of the exterior of the vehicle, which display the appropriate and required performance for each lighting function.

Description

OBJECT OF THE INVENTION

The present patent application relates to a vehicle lighting device, which incorporates remarkable innovations and advantages, and to a vehicle tailgate, which comprises said lighting device.

BACKGROUND OF THE INVENTION

Currently in the automotive sector there is a need to unify functions in vehicle parts, in particular in headlights and various lighting elements, and that is why we are researching the possibilities of various current components, with the aim of achieving said objective: that of presenting several lighting functions in a single component.

More precisely and with regard to the tailgate of the vehicle, we observe in certain designs of the rear areas of the vehicle the integration of components in the form of a red cover which extends longitudinally from the right position light to the left position light . In the prior art, these components have a substantially elongated and narrow shape in the form of a horizontal line, but it is only a decorative element which does not fulfill any lighting function. In this regard, it should also be noted that the third brake light is usually located in the highest area of the tailgate.

Are known in the prior art, as reflected in document US20060013012, an automobile light having at least a first light source associated with a reflector constituting a first lighting system whose light can be guided on a cover translucent. The reflector further comprises a screen which precedes the light source with respect to the cover panel. The screen is configured as a second front lighting system which includes at least a second light source. Both lighting systems can be adjusted to different levels of light intensity. The invention also relates to a method for indicating different models of automobile light signals, with two lighting systems which are located one behind the other, the light emitting surfaces of which overlap in part and which can be controlled individually with different light intensities.

In said document, a certain effect of floating in the light is observed, precisely to emphasize energetic braking. Apparently the geometries of the frames and the surfaces to be lit are round, which pushes to implement these ideas in round rear position lights.

Also known in the state of the art, as reflected in document DE102011117733, a light emitter of elongated shape which is arranged on the exterior surface of the vehicle. The light emitter has several light sources placed side by side. The incoming light is redirected by reflection and the reflected light leaves the module through an external surface or cover.

Thus, and in view of all of the above, it can be seen that there is still a need to be equipped with a lighting device for a vehicle such that it makes it possible to reinforce synergies, in particular by fulfilling two functions in the same area outside the vehicle, demonstrating the appropriate performance required for each lighting function.

DESCRIPTION OF THE INVENTION

The present invention consists of a lighting device for a vehicle, having two incorporated lighting functions: a first position light function, which incorporates a floating and homogeneous light line. It is sought that the light emitted by this first function constitutes a precise and very homogeneous signature. In addition, in a preferred embodiment, said first lighting function is arranged so that it extends from the left position light to the right position light of the vehicle. In addition, a second brake light function is produced in the same area as the first function. We are looking for the light emitted by this second function to be more intense and visible than the first function. In a particular embodiment, it is only in the central area that the brake light is projected.

The problem facing the present invention is that, while we are trying to achieve a first very precise and narrow position light function, this is not sufficiently perceptible by the user, when from the same red light position you want to produce the stop function. Thus, a lighting surface is shared between the first function and the second function, the surface being substantially elongated and narrow, providing the vehicle with a differentiated design. The problem to be solved by the present invention is to produce a second lighting function, which shares the emission surface with a first lighting function, so that the second lighting function can be more easily perceived. as the first lighting function by a user outside the vehicle.

Thus, and more specifically, the invention consists of a vehicle lighting device, in which the lighting device comprises at least a first light emitter, in which said first light emitter is configured to emit light substantially in a first direction, at least a second light emitter, in which said second light emitter is configured to emit light substantially in a second direction, an outer cover, a reflector, in which the reflector reflects the light emitted by said second light emitter, in which the device comprises a light pipe, in which the light pipe transmits the light emitted by said first light emitter to the outer cover, and characterized in that the reflector directs, at least partially, the light emitted by said second light emitter towards the outer cover, so re that the first direction of light emission and the second direction of light emission are substantially different. In this way we create a light effect through which we perceive a floating and homogeneous line of light as the first lighting function or position function and, when braking, with the second lighting function, we discern a halo of more powerful light inside the same lighting area. The two functions, position light and stop light, are integrated, without one discerning from the outside the technical means used to achieve such integration.

It is noted that, thanks to the present invention, a first lighting function is produced in the external cover which includes a homogeneous and precise light signature. At the same time, a second lighting function is produced in the outer cover which illuminates a substantially larger area than the first lighting function, which gives the second lighting function greater visibility. It is an objective of the present invention for the volume occupied by the components which constitute the lighting device to be minimal, since in this way they can be conveniently and easily integrated into the external elements of the vehicle, reducing to a minimum the impact of said integration.

It should be emphasized that the said halo effect is one which intensifies the effect of the stop light. Said halo effect is also necessary, since the position light, according to the elongated arrangement indicated above, is precise and thin. By means of said halo effect, a sufficient lighting and signaling result is achieved, by increasing its perception by third-party vehicles or other users outside the vehicle itself. As a result, and with the help of said second light emitter, it is possible to save the third brake light in the design of the vehicle. Likewise, the arrangement of the present invention makes it possible to establish more complex shapes in the position light, by opening up the design range.

Thus, and as a summary of the advantages of the present invention, the following advantages can be cited:

Integration of two functions in one, which reduces the dimensions of the rear lights. Elimination of the current third brake light, normally incorporated in elevated areas of the tailgate, so as to reduce the design complexity of the tailgate itself and of the electrical system, thanks to the fact that it is not necessary that electrical cables are arranged up to said upper area of the tailgate.

Much more uniform light output.

Three-dimensional effect or floating light, due to the halo effect.

Strong visual impact with the stop light function.

More safety in braking, because its signaling does not go unnoticed.

It should be noted that the expression towards the outer cover is equivalent to the same direction as that following the light pipe in its path from the interior of the lighting device to the outer cover.

In a preferred embodiment of the invention, the light pipe is essentially planar, due to the desired effect of finding a very narrow, precise and homogeneous position light. The flat light pipe makes it possible to produce a precise and reduced lighting surface, at the same time as it minimizes the volume occupied by the lighting device, by grouping the components together and bringing them closer to one another. It is therefore possible to distribute and emit light in narrow and elongated configurations, which allows greater customization of the light emitted by the light device.

More specifically, the light pipe comprises a first surface and a second surface, where the first surface receives the light emitted by said first light emitter and where the second surface emits the light transmitted by the light pipe, so that the light is transported to a point far from the transmitter almost without loss.

Thus, and while the first transmitter is distant from the exterior surface of the lighting device, integrating said light pipe makes it possible to conceal the internal components and the electronics, by moving it away from the cover, so that they are not not visible from outside the vehicle. In this way, it feels like the second surface is floating, without contact with other components, which thus improves the appearance.

In addition, and in connection with the above, the outer cover need not be an opaque surface, since this would create shadows and distortions in the light emitted. Also, with the design of the present invention, the first surface is not visible from the outside, preventing light emitters and other components from being seen from the outside.

Advantageously, the second surface is substantially parallel to the first surface, the second surface being arranged at one end of the light pipe opposite to the first surface. In this way there is a greater efficiency of light transmission from one end to the other of the light pipe.

According to another aspect of the invention, the lighting device comprises a diffuser, the diffuser being arranged adjacent to the second surface. This results in the desired effect of creating a light effect in which one perceives a floating line of light, without being able to discern the components which produce it. With the introduction of the diffuser at one end of the light pipe, this effect is obtained by additionally providing maximum homogeneity. In addition, the diffuser can be over-injected onto the second surface of the light pipe.

In a preferred embodiment of the invention, the first direction of light emission and the second direction of light emission are substantially perpendicular, so that it is possible to minimize the space occupied by the device lighting. The light emitters are, in a preferred embodiment, LED diodes and the advantages of low consumption and light efficiency of said elements are taken advantage of.

It should be mentioned that said first light emitter is arranged right next to said second light emitter, so that the space required is minimized, without there being any functional interference between the two light emitters. light.

More specifically, said first light emitter is disposed in front of said second light emitter in the first light emitting direction, so that said first light emitter is closer to the outer cover. Thus, said first light emitter and said second light emitter are adjacent to each other, said first light emitter being closer to the outer cover. In addition, the lighting device includes a printed circuit board or PCB, the printed circuit board comprising said first light emitter and said second light emitter. Thus, said first light emitter and said second light emitter share the electronics, so that synergies between components are increased and the cost of the lighting device is reduced.

In another embodiment of the invention, the lighting device comprises a plurality of first light emitters and a plurality of second light emitters, mode in which the plurality of second light emitters are arranged alternately with the plurality first light emitters, so that the distance between the plurality of first light emitters and the outer cover is substantially equal to the distance between the plurality of second light emitters and the outer cover. Thus, the plurality of first light emitters and the plurality of second light emitters share the same printed circuit board or PCB, so that synergies between components are increased and the cost of the lighting device is reduced. , as well as minimizing the space occupied. In this way we obtain a solution offering more power and light homogeneity, capable of being housed in a space reduced to a minimum, since it is a solution which has a plurality of light emitters.

According to another aspect of the invention, the first light emitter corresponds to a first lighting function and the second light emitter corresponds to a second lighting function, said second lighting function being different from the first light function. 'lighting. Specifically, the first light emitter corresponds to a first function for lighting the position light, and the second light emitter corresponds to a second function for lighting the brake light. In this way, and as has been mentioned, it is possible to take advantage of the position light lighting device to produce the brake light, which leads to saving a third brake light.

Furthermore, at least part of the light reflected by the reflector passes through the light pipe, perpendicular to its length, and through said third surface, so that said part of the light reflected by the reflector falls substantially over the entire surface. of the outer cover.

Specifically, a part of the light which passes through said light pipe is introduced into said pipe, a part passes through it and goes towards the upper part and a part comes out by bouncing and goes towards the lower part, so that one obtains a lighting in the upper and lower areas of the cover or framework with a single lower reflector.

By means of said effect, we fall into the advantage of minimizing the space necessary for the lighting device, the components of which are not visible and which only shows the outgoing lighting.

Advantageously, at least part of the light reflected by the reflector is received in the light pipe, so that the light pipe transmits said part of the light reflected by the reflector to the second surface, so that recovers part of the light initially lost at the entrance to the light pipe, thereby increasing the light output of the lighting device as a whole.

It should be noted that the light pipe comprises a third surface, where the third surface connects the first surface with the second surface, the third surface being turned towards the reflector, and where at least part of the light reflected by the reflector falls on the third surface. Thus and more precisely, the light which falls on the third surface can be reflected, it can enter the light pipe or can pass through said light pipe. Thus, there occurs the effect of illuminating, by means of the light produced by said second light emitter, the entire surface of the outer cover.

Also subject of the present application is a tailgate for a vehicle which uses a lighting device as described above. Said lighting device is, in a preferred embodiment, distributed along the entire width of the vehicle, which makes it more visible from other vehicles in circulation. The arrangement of the lighting device 7 has a minimum influence on the volume of the boot, since it is produced in the metal stamping or the plastic injection of the tailgate, the space occupied being optimized.

According to another aspect of the invention, the lighting device extends in a substantially horizontal plane, so that the outer cover connects a left light to a right light. In this way, the lighting device can be integrated into an embodiment comprising, in a single assembly, the lighting device and the two left and right lights.

Furthermore, said second light emitter and the reflector are arranged only in a central zone, the central zone being between the left light and the right light.

Thus, the tailgate comprises a lighting device arranged substantially horizontally and from a first end to a second end. Said first light emitter and the light pipe associated with the first light emitter extend along the lighting device described. In addition, said second light emitter and the reflector associated with the second light emitter are arranged only in the central area. In this way, savings are made in the extension of components along the entire width of the tailgate, producing a sufficient visual effect similar to that produced by the third known stop light in the upper part of the tailgate of the vehicle.

The accompanying drawings show, by way of non-limiting example, a vehicle lighting device, constituted in accordance with the invention. Other characteristics and advantages of said vehicle lighting device, object of the present invention, will become apparent from the description of a preferred, but not exclusive, embodiment which is illustrated by way of non-limiting example on the attached drawings, among which:

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is an elevational view of the rear area of a vehicle which includes the lighting device, in accordance with the present invention.

Figure 2 is a perspective view of the lighting device, where said first light emitter is activated, in accordance with the present invention.

Figure 3 is a sectional view of the lighting device in accordance with the present invention.

Figure 4 is a second sectional view of the lighting device, in accordance with the present invention.

DESCRIPTION OF A PREFERRED EMBODIMENT

In view of the aforementioned figures and in accordance with the numbering adopted, there can be observed an example of preferred embodiment of the invention, which comprises the parts and the elements which are indicated and described in detail below.

In Figure 1 we can discern a rear view of a vehicle which includes the lighting device 1. The lighting device 1 has an elongated and narrow geometry, so that it extends longitudinally from one side to the other of the tailgate, precisely between the upper part of the left 81 and right 82 rear lights. By central zone 83 is meant the zone of the lighting device disposed between said left and right rear lights 81, 82. It is in the central zone 83 which is preferably placed the reflector 5, and the stop light function of the lighting device 1 is shown.

Thus, in a preferred embodiment, the lighting device 1 is divided into at least two zones, the central zone 83 delimited by two lateral zones, where each lateral zone is disposed between the rear light and the central zone 83. in this way, the structure and arrangement of the components constituting the lighting device 1 in the central area 83 are explained in detail in Figure 4. On the other hand, the structure and arrangement of the components constituting the lighting device 1 in the lateral zone are explained in detail in FIGS. 2 and 3. As a variant, the structure and the arrangement of the components of the central zone 83 can be used over the entire length and extension of the lighting device 1.

In a preferred embodiment, a first lighting function and a second lighting function are emitted in the central zone 83. In this way, at least one first light emitter 2 fulfills a first lighting function, preferably a position light signaling and at least a second light emitter 3 fulfills a second lighting function, preferably a braking signaling. The two lighting functions are independently controlled and turned on according to the currently known parameters.

In Figure 2 we can discern a perspective view of the rear part of a vehicle seen from outside the vehicle. In this schematic and perspective view, the lighting device 1 is observed. Specifically, only the second lighting function produced by said second light emitter 3 is activated. Thus, a homogeneous lighting effect can be observed over the length and width of the entire surface of the cover 7. It is therefore a signature or precise lighting, with a homogeneous light dispersion and a height illuminated narrow, so that an effect of a floating illuminated line is obtained, without being able to discern the technique and the components which constitute the lighting device 1.

In Figure 3 we can discern a side sectional view of a side area of the lighting device 1, where the lighting device 1 fulfills only the first lighting function. Thus, at least one second light emitter 3 is configured to emit light substantially in a second direction. In addition, a light pipe 4 transmits the light emitted by said first light emitter 2 to the outer cover 7. In this way, a homogeneous and precise position light is produced. This light pipe 4 can be a solid light pipe, which collects the light emitted by at least one LED on a first surface 41. The light pipe 4 transmits said light to the second surface 42. In order to increase the homogeneity of the light emitted, the lighting device 1 comprises a diffuser 6. This diffuser can be a PMMA molded onto the second surface 42 or, alternatively, optical or granite structures used on the second surface 42 itself.

The floating light effect sought to illuminate the first lighting function is obtained thanks to the presence of the diffuser 6 and to the internal arrangement of the walls of the frame, and, as mentioned, the distance between said second transmitter. 2 and the cover 7, kept via the light pipe 4.

In Figure 4 we can discern a side sectional view of the central area 83, where the lighting device 1 fulfills the first lighting function and the second lighting function. Thus, a first light emitter 2 and a second light emitter 3 are configured to respectively create the first lighting function and the second lighting function. It can be observed that the first emitter 2 is located right next to the light pipe 4, which transmits light from a first surface 41 to a second surface 42 on which the diffuser 6 is located. The second emitter 3 emits substantially towards a reflector 5, which reflects light towards the cover 7.

In this way we have a first lighting function which produces a precise and homogeneous light, where the first lighting function is enveloped by a second lighting function, so that it allows to increase the perception by l user, at the same time as it creates a halo or halo effect. We are trying to create a light effect which allows us to perceive a floating and homogeneous line of light as a position function, not to mention that, when braking occurs, we see a more intense halo of light emitted in the outer cover 7 itself . In this way we integrate the two functions in a minimal volume or occupied space and without an external user being able to discern the technique or the components used to create these two functions.

It should be noted that the first transmitter 2 preferably fulfills the function of position light, which is usually a floating and homogeneous line of light. The second transmitter 3 preferably fulfills the function of brake light, because it is a more powerful light, coming out, in the case of the present invention, from the same cavity as the position light. We observe that both the first lighting function and the second lighting function are of the same color, in this particular case red.

As mentioned, by means of this arrangement, one does not observe, from the outside of the vehicle and from the outside of the lighting device 1, the technique and components which there are from behind, only the final diffuser 6 and the halo, as a three-dimensional effect.

More particularly, as can be discerned in FIG. 4, the lighting device 1 for a vehicle, in which the lighting device 1 comprises at least a first light emitter 2, in which said first light emitter 2 is configured to emit light substantially in a first direction, at least a second light emitter 3, wherein said second light emitter 3 is configured to emit light substantially in a second direction, an outer cover 7, a reflector 5, in which the reflector 5 reflects the light emitted by said second light emitter 3, in which the device comprises a light pipe 4, in which the light pipe 4 transmits the light emitted by said first light emitter 2 towards the outer cover 7, and characterized in that the reflector 5 directs, at least partially, the light emitted by said second light emitter 3 towards the outer cover 7, so that the first direction of light emission and the second direction of light emission are substantially different.

Some examples of implementation with regard to the activation of the various light emitters would be the following:

first transmitter 2, activated when it signals the position light, second transmitter 3, activated when the brake light function is signaled, first transmitter 2 and second transmitter 3 on the same PCB or printed circuit board, first transmitter 2 plus conduit light 5 plus diffuser 6 at the end, or second surface 42, of the light pipe 4, which gives rise to uniform light and / or to a precise signature.

second emitter 3 plus reflector 5 gives rise to a more powerful halo of light in the same area or surface of the cover 7.

In another particular embodiment, additional light emitters, or LEDs, are included so as to create the stop light function in the light pipe 4, which makes it possible to increase the intensity of light produced through the light pipe 4.

On the other hand, as can be discerned in Figures 3 and 4, the light pipe 4 is essentially planar, and arranged in the same plane, preferably horizontal.

More specifically, as can be seen in Figures 3 and 4, the light pipe 4 comprises a first surface 41 and a second surface 42, where the first surface 41 receives the light emitted by said first light emitter 2 and where the second surface 42 emits the light transmitted through the light pipe 4.

It should be mentioned that, as can be seen in FIGS. 3 and 4, the second surface 42 is substantially parallel to the first surface 41, the second surface 42 being disposed at one end of the light pipe 4 opposite the first surface 41 It should be noted that, in a particular embodiment, the first surface 41 and the second surface 42 are perpendicular to the first direction.

According to a preferred embodiment of the invention, as can be seen in FIGS. 3 and 4, the lighting device comprises a diffuser 6, the diffuser 6 being disposed adjacent to the second surface 42.

It should be mentioned that, in one embodiment, the second surface 42 is elongated and narrow, the diffuser 6 also being elongated and narrow. In addition, the diffuser 6 can be fixed by over-injection, or glued, to the second surface 42.

In order to obtain maximum homogeneity in the second surface 42 of the end, use is made of a diffuser 6 made of a material such as, for example, a PMMA plastic. Alternatively, it is possible to use granite structures or optical structures on the second surface 42, so as to obtain a more homogeneous effect in the lighting. On the other hand, the over-injection of the diffusing layer leads to an improvement in the process, since there are no parts, connections or assembly steps added.

More particularly, as can be discerned in FIG. 4, the first direction of light emission and the second direction of light emission are substantially perpendicular.

More precisely, as can be discerned in FIG. 4, said first light emitter 2 is arranged very next to said second light emitter 3.

According to another aspect of the invention, as can be seen in FIG. 4, said first light emitter 2 is arranged in front of said second light emitter 3 in the first light emitting direction, so that said first emitter 2 of light is closer to the outer cover 7.

According to a variant of the invention, the lighting device 1 comprises a plurality of first light emitters 2 and a plurality of second light emitters 3, a variant in which the plurality of second light emitters 3 are arranged alternately with the plurality of first light emitters 2, so that the distance between the plurality of first light emitters 2 and the outer cover 7 is substantially equal to the distance between the plurality of second light emitters 3 and the outer cover 7. In this way, this makes it possible to minimize the space occupied by the lighting device 1, at the same time as a reduction in costs is obtained because the plurality of first light emitters 2 and the plurality of second emitters 3 lights share the same PCB and the same associated electronics.

It should also be mentioned that an outer cover 7 covers the light outlet of the lighting device 1 and that said cover 7 is, in one embodiment, partially translucent, so that it can modify the color of the light emitted by the lighting device 1.

According to another aspect of the invention, as can be discerned in FIG. 4, at least part of the light reflected by the reflector 5 passes through the light pipe 4, so that said part of the light reflected by the reflector 5 falls substantially over the entire surface of the outer cover 7.

In more detail, said first light emitter 2 emits light in a first direction and said second light emitter 3 emits light in a second direction, the first and second directions being substantially perpendicular to each other. In this way, we succeed in minimizing the space occupied by the lighting device 1 and the impact of its integration into the vehicle. In addition, the light beams emitted by said second light emitter 3 and reflected on the reflector 5 produce a scattered light beam, so that it is possible to illuminate the entire outer cover 7.

More specifically, as can be seen in Figure 4, at least part of the light reflected by the reflector 5 is received in the light pipe 4, so that the light pipe 4 transmits said part of the light reflected by the reflector 5 to the second surface 42.

At least a portion of the light beams reflected by the reflector 5 are emitted directly to the outer cover 7. On the other hand, at least part of the light beams reflected by the reflector 5 fall on a third surface 43 of the light pipe 4. This third surface 43 is disposed between the first surface 41 and the second surface 42. At least a part light beams incident on the third surface 43 are introduced into the light pipe 4 and transmitted by the light pipe 4 to the second surface 42, so that they are emitted through the diffuser 6. In this way , when activating said second light emitter 3, the intensity of the light of the first lighting function is increased indirectly. In this way, the first lighting function will be more intense in the central zone 83 than in the lateral zones of the lighting device 1.

In addition, at least part of the light beams incident on the third surface 43 diffract and pass through the light pipe 4, in such a way that it makes it possible to illuminate the upper zone of the light pipe 4, thus lighting the upper part of the outer cover 7. Advantageously, it is observed that the signature formed by the illuminated diffuser 6 of the first lighting function is enveloped in beams of light produced by the second lighting function, thus increasing the effect of floating light and of halo, resulting in an increase in perception by a user outside the vehicle.

The present invention also comprises, as can be seen in FIG. 1, a tailgate 8 for a vehicle using a lighting device 1.

More particularly, as can be seen in FIGS. 1 and 2, the lighting device 1 extends in a substantially horizontal plane, so that the outer cover 7 connects a left light 81 to a right light 82. The light 81 , 82 can be a fixed part or a moving part, that is to say a part integrated into the tailgate 8.

We may at our option replace the details, shapes, dimensions and other accessory elements, as well as the components used in the implementation of the vehicle lighting device by others which are technically equivalent without departing from the essence of the invention or of the framework defined by the claims which we include following the list below.

List of numerical references:

lighting device first emitter second emitter light pipe first surface second surface third surface reflector diffuser cover tailgate left light right light central area

Claims (15)

1- Lighting device (1) for a vehicle, in which the lighting device (1) comprises: at least a first light emitter (2), wherein said first light emitter (2) is configured to emit light substantially in a first direction, at least a second light emitter (3), in which said second emitter (3) of light is configured to emit light substantially in a second direction, an outer cover (7), a reflector (5), in which the reflector (5) reflects the light emitted by said second emitter (3) light, characterized in that the device comprises a light pipe (4), in which the light pipe (4) transmits the light emitted by said first light emitter (2) towards the outer cover (7), and in that that the reflector (5) directs, at least partially, the light emitted by said second light emitter (3) towards the outer cover (7), so that the first direction of light emission and the second direction d ' Light mission are significantly different. 2- Lighting device (1) for a vehicle according to claim 1, characterized in that the light pipe (4) is essentially planar. 3- lighting device (1) for vehicle according to claim 2, characterized in that the light pipe (4) comprises a first surface (41) and a second surface (42), wherein the first surface (41) receives the light emitted by said first light emitter (2), and in which the second surface (42) emits the light transmitted by the light pipe (4). 4- lighting device (1) for vehicle according to claim 3, characterized in that the second surface (42) is substantially parallel to the first surface (41), the second surface (42) being disposed at one end of the duct light (4) opposite the first surface (41). 5- Lighting device (1) for a vehicle according to claim 3, characterized in that it comprises a diffuser (6), in which the diffuser (6) is arranged adjacent to the second surface (42). 6- Lighting device (1) according to any one of the preceding claims, characterized in that the first direction of light emission and the second direction of light emission are substantially perpendicular. 7- Lighting device (1) according to any one of the preceding claims, characterized in that said first light emitter (2) is arranged adjacent to said second light emitter (3). 8- Lighting device (1) according to any one of the preceding claims, characterized in that said first light emitter (2) is arranged in front of said second light emitter (3) in the first light emission direction , so that said first light emitter (2) is closer to the outer cover (7). 9- Lighting device (1) according to any one of claims 1 to 7, characterized in that it comprises a plurality of first emitters (2) of light and a plurality of second emitters (3) of light, in wherein the plurality of second light emitters (3) are arranged alternately with the plurality of first light emitters (2), so that the distance between the plurality of first light emitters (2) and the outer cover (7) is substantially equal to the distance between the plurality of second light emitters (3) and the outer cover (7). 10- Lighting device (1) for vehicle according to claim 1, characterized in that the first light emitter (2) corresponds to a first lighting function and the second light emitter (3) corresponds to a second function lighting. 11- Lighting device (1) for a vehicle according to claim 1, characterized in that at least part of the light reflected by the reflector (5) passes through the light pipe (4), so that said part of the light reflected by the reflector (5) falls substantially over the entire surface of the outer cover (7). 12- Lighting device (1) for vehicle according to claim 3, characterized in that at least part of the light reflected by the reflector (5) is received in the light pipe (4), so that the light pipe (4) transmits said part of the light reflected by the reflector (5) to the second surface (42). 13. Tailgate (8) for a vehicle which uses a lighting device (1) according to any one of claims 1 to 12. 14. Tailgate (8) for a vehicle according to claim 13, characterized in that the device 10 lighting (1) extends in a substantially horizontal plane, so that the outer cover (7) connects a left light (81) to a right light (82). 15- Tailgate (8) for vehicle according to claim 14, characterized in that said second light emitter (3) and the reflector (5) are arranged only in the area 15 central (83), wherein the central area (83) is between the left light (81) and the right light (82).