VEHICLE LIGHTING SYSTEM, WITH THREE LIGHTING MODULES TOGETHER PROVIDING A LOW BEAM FUNCTION

Abstract

VEHICLE LIGHTING SYSTEM WITH THREE LIGHTING MODULES TOGETHER PERFORMING A LOW BEAM FUNCTION. A lighting system (LS) is fitted to a vehicle and comprises a mounting plate (MP) on which are installed: a first module (ME1) including a photon-generating source and a lens (L1) acting on these photons so that they are directed towards a first front zone (ZA1) and participate in the first part of a low beam photometric function, and translatable to define a cutoff line; and second (ME2) and third (ME3) modules coupled in motion, each including a photon-generating source and a lens (L2, L3) acting on these photons so that they are directed towards a second front zone (ZA2) located below the first front zone (ZA1) and participate in the second part of the photometric function. (Figure 2)

Description

Title of the invention: VEHICLE LIGHTING DEVICE, WITH THREE LIGHTING MODULES TOGETHER FORMING A LOW BEAM FUNCTION

[0001] The invention relates to lighting devices intended to equip vehicles (possibly automobiles), and more specifically those which perform a photometric function of dipped beam (or low beam).

[0002] Some vehicles (generally of the automobile type) are equipped with at least one lighting device comprising a plate on which are installed, on the one hand, a first lighting module comprising a source generating photons and a lens acting on these generated photons so that they move towards a first front zone and participate in a first part of a photometric function of dipped (or dipped) light, and, on the other hand, a second lighting module comprising a source generating photons and a second lens acting on these generated photons so that they move towards a second front zone located below the first front zone and participate in a second part of this photometric function.

[0003] A lighting device for vehicles, in particular for headlights, comprising a housing with a plurality of lighting units for generating at least one light distribution, is known from WO2011 / 045358, in which the lighting units each have a number of light sources and a number of front optics arranged in front of them in the main emission direction, and in which at least one lighting unit is assigned a frame for the basic adjustment of the lighting device.

[0004] The first part of the dipped beam photometric function is generally designated by its English name "kink", and is intended to produce an auxiliary optical flow which those skilled in the art call the "cut".

[0005] The second part of the dipped beam photometric function is generally designated by its English name "fiat," and its purpose is to achieve the main optical flow. The auxiliary optical flow (or kink) comprises a part superimposed locally on the main beam (fiat) and a complementary part extending above the main beam.

[0006] Currently, the photon source and lens of each lighting module are fixedly attached to an inner face of a circuit board, which is generally housed in the casing of an optical unit. The source of a module is frequently mounted on a printed circuit board (possibly of the PCB type).

[0007]

[0008]

[0009]

[0010]

[0011] (Printed Circuit Board), which is typically screwed onto mounting tabs on the circuit board. Similarly, the lens of each module usually includes at least one mounting tab that is screwed, either directly or via a coupling piece, onto a corresponding mounting tab on the circuit board. The number of operations required to install each lighting module is therefore significant, increasing assembly time and thus manufacturing costs. Furthermore, the number of mounting tabs required on the circuit board complicates its production, as well as that of the lens, and increases its overall size. Furthermore, although it is relatively easy to move the plate in at least one direction (generally the transverse direction of the vehicle), the presence of fixing tabs makes the relative movement of one module in relation to the other complex, and therefore the precise adjustment of the low beam photometric function. The invention is therefore intended, in particular, to improve the situation. In particular, it offers a lighting system for this purpose, designed to equip a vehicle and comprising a mounting plate on which the following components are installed: - a first (lighting) module comprising a photon-generating source and a first lens acting on these generated photons so that they are directed towards a first front zone and participate in a first part of a dipped beam photometric function, and - a second module (lighting) comprising a source generating photons and a second lens acting on these generated photons so that they move towards a second front zone located below the first front zone and participate in a second part of this photometric function. This lighting system is characterized by the fact that: - that it also includes a third (lighting) module installed on the platform, coupled in motion to the second module, and comprising a source generating photons and a third lens acting on these generated photons so that they are directed towards the second front zone and participate in the second part of the photometric function, and - that its first module is translatable relative to its plate along a first direction in order to be positioned independently of its second and third modules to define a cutting line. Thanks to this combination of action of the second and third modules, the performance and efficiency of the second part of the photometric function (and therefore of the main flux) is significantly improved, making it easier to meet lighting requirements, while at the same time the precise adjustment of the relative position of the first module with respect to the second and third modules allows the position of the cutoff line to be perfectly defined.

[0012] The lighting device according to the invention may include other features which may be taken separately or in combination, and in particular: - the first direction can be parallel to a vertical direction of the vehicle; - its platform can be translatable along at least a second direction which is perpendicular to the first direction; • the second direction can be parallel to a transverse direction of the vehicle; - its first module can be shifted forward relative to the second and third modules along a third direction perpendicular to the first direction and parallel to a longitudinal direction of the vehicle; - its second module can be offset relative to the third module along the first direction; - the first lens can be of the plano-convex type, and the second and third lenses can be of the plano-concave type; - Each of its first, second, and third modules may comprise upper and lower shells, each elongated towards the first and second front zones, and joined together to define an internal space in which the first, second, or third lens is fixedly installed. In this case, each upper shell includes a first rear section that defines a housing, in which the associated source is installed, at least partially, and coupled to the mounting plate.

[0013] The invention also proposes a vehicle optical unit comprising a lighting device of the type presented above.

[0014] The invention also proposes a vehicle, possibly of the automobile type, and comprising at least one optical block of the type presented above.

[0015] Other features and advantages of the invention will become apparent from an examination of the detailed description below, and the accompanying drawings (obtained using CAD / CAM (“Computer-Aided Design / Computer-Aided Manufacturing”), hence the apparently discontinuous nature of certain lines), on which: - Figure 1 schematically illustrates, in a front perspective view, part of an example of an optical block comprising an example embodiment of a lighting device according to the invention, - Figure 2 schematically illustrates, in a perspective view, the lighting device of Figure 1 with its mounting plate, without its mask, and before its installation in the optical block housing. - Figure 3 schematically illustrates, in a cross-sectional view, an example of first and second front zones, - Figure 4 schematically illustrates, in a perspective view, an example for the creation of a second module of the lighting system shown in Figures 1 and 2, - Figure 5 schematically illustrates, in a perspective view, some of the elements of a second module of the lighting system shown in Figures 1 and 2, before their assembly, and - Figure 6 schematically illustrates, in a perspective view, an example of the realization of a first module of the lighting device of Figures 1 and 2.

[0016] The invention aims in particular to propose a lighting device DE intended to equip a vehicle and comprising three lighting modules ME1 to ME3 which together provide a photometric function of dipped beam.

[0017] In the following, by way of non-limiting example, the DE lighting device is considered to be intended for use in a BO optical unit of a motor vehicle, such as a car. In this case, the BO optical unit is a front projector (or headlight) providing at least a photometric function for dipped (or low) headlights. However, the invention is not limited to this application. Indeed, a DE lighting device can be a standalone piece of equipment (optionally comprising its own housing and protective lens) intended to equip a motor vehicle in order to provide a photometric function for dipped (or low) headlights. Furthermore, the BO optical unit, like the DE lighting device, can be used in any type of vehicle equipped with a photometric function for dipped (or low) headlights.

[0018] In figures 1 to 6, the X direction is a so-called longitudinal direction because it is intended to be parallel to a longitudinal side of a vehicle, the Y direction is a so-called transverse direction because it is intended to be perpendicular to the longitudinal sides of this vehicle and therefore perpendicular to the longitudinal direction X, and the Z direction is a vertical direction, perpendicular to the longitudinal direction X and the transverse direction Y.

[0019] Figure 1 schematically illustrates part of a vehicle optical block BO (here a front projector) comprising, in particular, a housing BB delimiting with a protective glass (not shown) a cavity housing in particular a lighting device DE according to the invention.

[0020] The BB housing is intended, in this case, to be attached to a part of a vehicle's bodywork (here, to a front part, such as a front fender). It is made of a rigid material, such as a plastic or synthetic material. In this case, it can be manufactured by molding.

[0021] The protective glass can, for example, be made of glass or plastic. It is fixedly attached to a front part of the BB housing, for example by gluing, welding, or screwing. Furthermore, it may optionally be one or more colors chosen from crystal white, red, and orange.

[0022] As illustrated (at least partially) in Figures 1 and 2, a lighting device DE, according to the invention, comprises a PL plate on which three lighting modules ME1 to ME3 are installed.

[0023] This PL plate is coupled to the BB housing of the BO optical block (in the cavity). It can be made by molding a rigid plastic or synthetic material, such as polyethylene (or PE) or polypropylene (or PP) or polycarbonate (or PC).

[0024] The first module ME1 comprises at least one (non-visible) source and a first LL lens

[0025] The photon source of the first ME1 module is arranged to generate photons that participate in a first part of the photometric function (of the dipped beam). This first part of the photometric function (or kink function) aims to produce the auxiliary optical flux that those skilled in the art generally call the cutoff.

[0026] This source may, for example, comprise at least one light-emitting diode, either of the conventional type (or LED) or of the organic type (or OLED), or at least one laser diode. For example, this source may comprise four conventional light-emitting diodes. The operation of this (photon) source is controlled by control means which may, for example, be at least partially part of at least one DC printed circuit board (partially visible in Figure 6), possibly of the PCB (Printed Circuit Board) type. It should be noted that the (photon) source may also optionally be installed on this DC printed circuit board. In this case, this DC printed circuit board also forms part of the first ME1 module.

[0027] The first lens L1 of the first module ME1 is arranged so as to act on the photons generated by the associated source so that they are directed towards a first forward zone ZA1 and participate in the first part of the photometric function. In the example described here, the first forward zone ZA1 is located at the level of the protective glass of the optical block BO. In the absence of protective glass, this first forward zone ZA1 is located downstream of the first lens LL

[0028] This first lens L1 can, for example, be made by molding a transparent plastic material such as polymethyl methacrylate (or PMMA) or polycarbonate (or PC). Furthermore, this first lens L1 can, for example, be of the plano-convex type.

[0029] This first module ME1 is translatable relative to the PL plate along a first direction so as to be positioned independently of the second ME2 and third ME3 modules to define a cutoff line LC shown in Figure 3. The cutoff line LC and the first zone before ZA1 form an angle and They end in a dark area where there is no light; this is the area in which an oncoming vehicle will be positioned so as not to dazzle its passengers.

[0030] Preferably, the first direction is parallel to the vertical direction Z of the vehicle.

[0031] As illustrated, but not limited to, in Figure 6, the translation of the first module ME1 relative to the PL plate can, for example, be achieved by means of a screw V having one part coupled to the PL plate and another part coupled to a rear part of the first module ME1. This screw V can optionally be driven in rotation by a site corrector (electric motor) controlled by electronic control means.

[0032] The second module ME2 comprises at least one (non-visible) source and a second lens L2. It is preferably fixedly attached to the PL stage. However, it could be considered that it be translatable relative to the PL stage.

[0033] The photon source of the second ME2 module is arranged to generate photons that participate in a second part of the photometric function (low beam). This second part of the low beam photometric function (or fiat function) is intended to achieve the main optical flux.

[0034] This source may, for example, comprise at least one light-emitting diode, either conventional (or LED) or organic (or OLED), or at least one laser diode. For example, this source may comprise seven conventional light-emitting diodes. The operation of this (photon) source is controlled by control means which may, for example, be at least partially part of at least one DC printed circuit board (partially visible in Figure 4), possibly of the PCB type. It should be noted that the (photon) source may also be installed on this DC printed circuit board. In this case, this DC printed circuit board also forms part of the second ME2 module.

[0035] The second lens L2 of the second module ME2 is arranged so as to act on the photons generated by the associated source, directing them towards a second forward zone ZA2 located below the first forward zone ZA1, as illustrated in Figure 3, and thus participate in the second part of the photometric function. In the example described here, the second forward zone ZA2 is located at the level of the protective glass of the optical block BO. In the absence of protective glass, this second forward zone ZA2 is located downstream of the second lens L2.

[0036] This second lens L2 can, for example, be made by molding a transparent plastic material such as polymethyl methacrylate (or PMMA) or polycarbonate (or PC). Furthermore, this second lens L2 can, for example, be of the plano-concave type.

[0037] The third ME3 module comprises at least one (non-visible) source and a The third lens, L3, is coupled in motion (and therefore mechanically) to the second module, ME2. Consequently, when ME2 is fixed to the PL stage (possibly via a coupling piece), the third module, ME3, is also fixed to the PL stage (possibly via this coupling piece). However, it is possible to allow the third module, ME3, to be translatable relative to the PL stage. The goal here is for the second ME2 and third ME3 modules to move simultaneously and in the same direction.

[0038] The (photon) source of the third ME3 module is arranged to generate photons to participate in a second part of the photometric (low beam) function.

[0039] This source may, for example, comprise at least one light-emitting diode, either conventional (or LED) or organic (or OLED), or at least one laser diode. For example, this source may comprise seven conventional light-emitting diodes. The operation of this (photon) source is controlled by control means which may, for example, be at least partially part of at least one DC printed circuit board, possibly of the PCB type. It should be noted that the (photon) source may also be installed on this DC printed circuit board. In this case, this DC printed circuit board also forms part of the third ME3 module.

[0040] The third lens L3 of the third module ME3 is arranged so as to act on the photons generated by the associated source so that they are directed towards the second zone before ZA2 and participate in the second part of the photometric function in addition to the photons from the second module ME2.

[0041] This third lens L3 can, for example, be made by molding a transparent plastic material such as polymethyl methacrylate (or PMMA) or polycarbonate (or PC). Furthermore, this third lens L3 can, for example, be of the plano-concave type.

[0042] It should be noted that the third module ME3 may optionally be identical to the second module ME2. But this is not mandatory.

[0043] It will be understood that the third module ME3 is primarily intended to combine its action with that of the second module ME2 in order to improve the performance of the second part of the photometric function (and therefore of the main flux), so that it more easily complies with lighting requirements. At the same time, the precise adjustment of the relative position of the first module ME1 with respect to the second ME2 and third ME3 modules allows for the precise definition of the position of the LC cutoff line.

[0044] It should also be noted that the PL plate can advantageously be translatable along at least a second direction perpendicular to the first direction. Preferably, this second direction is parallel to the vehicle's transverse Y-direction, which is one of the two directions of the horizontal plane. For this purpose, the PL plate can, for example, be coupled to the BB housing via a screw (possibly driven by an electric motor). Alternatively, or in addition, the PL plate could be coupled to a site correction system (electric motor) controlled electronically to provide, for example, height correction based on the vehicle's attitude.

[0045] For example, and as illustrated, but not limited to, in Figures 1 and 2, the first module ME1 can be offset forward relative to the second ME2 and third ME3 modules along a third direction perpendicular to the first direction and parallel to the longitudinal direction X of the vehicle. Alternatively, the first module ME1 can have an extension along the third direction that is greater than that of the second ME2 and third ME3 modules, so that its front portion, opposite its rear portion and the PL plate, is located in front of the respective front portions of the second ME2 and third ME3 modules. This allows the use of a protective glass with a particular shape and the movement of the first module ME1 relative to the others (ME2 and ME3) and / or provides a stylistic effect.

[0046] Also, for example, and as illustrated but not limited to Figures 1 and 2, the second module ME2 can be offset relative to the third module ME3 along the first direction (here parallel to the vertical direction Z). This makes it possible to use a protective glass with a particular shape and / or to create a stylistic effect.

[0047] It will also be noted, as illustrated non-limitingly in Figures 1 and 2, that each of the first ME1, second ME2 and third ME3 modules can comprise upper shells Cl and lower shells C2 each having an elongated shape in the direction of the first ZA1 and second ZA2 front zones (and therefore along the longitudinal direction X), and joined together by defining an internal space El in which the first L1, second L2 or third L3 associated lens is fixedly installed.

[0048] The upper shell Cl of each module ME1, ME2 or ME3 comprises a first rear part PR1, a first front part PV1 and an intermediate part joining the first rear parts PR1 and front PV1. The first rear part PR1 defines a housing LA in which the associated source is installed at least partially, and is coupled to the PL board.

[0049] The upper shells Cl and lower shells C2 of each module ME1, ME2, or ME3 can be made by molding a rigid plastic or synthetic material, such as polyethylene, polypropylene, or polycarbonate. Furthermore, at least one of the upper shells Cl and lower shells C2 of each module ME1, ME2 or ME3 can be at least partially stylized.

[0050] Each ME1, ME2, or ME3 module thus has a long overhang that gives the impression that it is levitating (or floating) (here inside the BO optical block). Furthermore, this allows the DE lighting system, and in particular each of its ME1, ME2, and ME3 modules, to contribute to the style and / or signature of the BO optical block.

[0051] The overhang of each module ME1, ME2 or ME3 can, for example, be between 30 mm and 100 mm.

[0052] For example, and as illustrated without limitation in Figures 4 and 6, each module ME1, ME2 or ME3 may include a metal radiator RM fixedly attached to the plate PL and to which at least the first rear portion PR1 of its upper shell CL is fixedly attached. This metal radiator RM is arranged to dissipate heat produced by the source in the housing LA comprising this first rear portion PRL

[0053] For example, each RM metal radiator can be made of aluminum, which offers good rigidity for a low weight. This rigidity allows it to support a significant overhang.

[0054] As illustrated non-limitingly in Figures 4 and 6, each metallic radiator RM may include a front part placed above the housing LA of the first rear part PR1 of the upper shell Cl and to which at least this first rear part PR1 is fixedly attached, for example by screwing.

[0055] It should be noted that when each module ME1, ME2, or ME3 includes its own printed circuit board CC and its power source is mounted on it (CC), this printed circuit board CC is positioned above the slot LA of the first rear section PR1 of the upper shell Cl, with the power source housed in this slot LA to power the first L1, second L2, or third L3 associated lens. In this case, the printed circuit board CC is closely sandwiched between the front section of the metal heat sink RM and the first rear section PR1 of the upper shell Cl (at the level of its slot LA) so as to be securely fastened to this first rear section PR1 and to the metal heat sink RM (for example, by means of screws).

[0056] For example, and as illustrated, but not limited to, in Figure 5, the lower shell C2 of each module ME1, ME2, or ME3 may comprise a second rear portion PR2, a second front portion PV2, and an intermediate portion joining the second rear portions PR2 and the front portion PV2. In this case, this second rear portion PR2 may advantageously be fixedly attached to the first rear portion PR1 of the upper shell Cl and to the metal heat sink RM (for example, via screws). This advantageously allows the upper shell Cl and lower shell C2 to be fixedly joined to each other (and to the metal heat sink RM) via their first PR1 and second PR2 respective rear parts.

[0057] It will be noted that the first PV1 and second PV2 front parts, respectively of the upper shells Cl and lower shells C2, can be fixedly joined together by clipping, screwing or fitting together by cooperation of shapes.

[0058] Also, for example, and as illustrated non-limitingly in Figure 4, the lower shell C2 of each ME1, ME2, or ME3 module can be coupled to the metal heatsink RM in order to position it precisely relative to the latter (RM). For this purpose, the lower shell C2 may include a PCI coupling tab extending towards the PL board (and therefore towards the rear) and having a through hole TT, and the metal heatsink RM may include a coupling pin PC2 perpendicular to this PCI coupling tab and passing through the through hole TT in order to couple the second rear part PR2 to the metal heatsink RM in a lower area. Preferably, this coupling pin PC2 has a conical shape with a circular cross-section to facilitate its insertion into the through hole TT and to constrain the elements (C1, C2, CC, RM) to each other to prevent vibrations.

[0059] It should also be noted, as illustrated (though not exhaustively) in Figure 5, that the first front portion PV1 of the upper shell C1 (opposite its first rear portion PR1 and to which the second front portion PV2 of the lower shell C2 is fixedly coupled) may be provided with an opening 01 which closely accommodates a third front portion PV3 of the first L1, second L2, or third L3 associated lens, opposite the source. This allows the third front portion PV3 of the first L1, second L2, or third L3 lens to be precisely positioned relative to the second front portion PV2 of the lower shell C2 along the three directions X, Y, and Z.

[0060] It should also be noted, as illustrated (though not exhaustively) in Figure 5, that each first L1, second L2, or third L3 lens may have an elongated shape in the direction of the first ZA1 and second ZA2 forward zones (and therefore along the longitudinal direction X). In this case, it (L1, L2, or L3) may include a third rear portion PR3, opposite its third front portion PV3 (and therefore the source), and fixedly attached to the first rear portion PR1 of the upper shell C1, to the second rear portion PR2 of the lower shell C2, and to the metal heat sink RM (for example, via screws). It will be understood that with such an arrangement, the third rear portion PR3 of each first L1, second L2, or third L3 lens includes a (rear) end positioned below the source of its module ME1, ME2, or ME3, which allows it to be supplied with photons in an optimized manner.The shape of each first L1, second L2 or third L3 lens is adapted to guide photons towards its third part before PV3 which is more precisely charged with acting on them so that they participate correctly in the first or . second part of the photometric function.

[0061] It should also be noted, as illustrated in Figures 1, 2, and 4 to 6, that each ME1, ME2, or ME3 module may include a PA cover piece positioned in front of its first L1, second L2, or third L3 lens (and more precisely in front of its third forward section PV3) and fixedly coupled to the first forward section PV1 of the upper shell Cl, for example, by clipping or screwing. This PA cover piece is transparent to allow the passage of photons exiting the first L1, second L2, or third L3 lens and heading towards the first ZA1 or second ZA2 forward zone. It is intended to mask the front face of the third forward section PV3 and the opening 01 of the first forward section PV1 of the upper shell Cl. Furthermore, this PA cover piece may be at least partially stylized.

[0062] The PA cover piece can, for example, be made by molding a transparent plastic material such as polymethyl methacrylate (or PMMA) or polycarbonate (or PC).

[0063] It should also be noted that the ME1 to ME3 modules of a DE lighting device may have different shapes and / or dimensions from each other.

[0064] It should also be noted, as illustrated (though not exhaustively) in Figure 1, that the DE lighting device may also include a mask MA fixedly attached to its PL plate and equipped with three openings 021 to 023. Each opening 021, 022, or 023 is traversed by an intermediate portion of the associated ME1, ME2, or ME3 module (which extends the first rear portion PR1 of the upper shell Cl towards the first ZA1 or second ZA2 front zone). This advantageously allows the rear portion (PR1-PR3, RM) of each ME1, ME2, or ME3 module, which constitutes its technical component, to be masked. Thus, the entire technical component of the DE lighting device is invisible when viewed from the front (DE) or from the protective glass of the optical block BO. Furthermore, this reinforces the impression that each ME1, ME2, or ME3 module is floating through its associated opening 021, 022, or 023.This impression can be further enhanced by using a black MA mask.

[0065] This MA mask can be made by molding a rigid plastic or synthetic material, such as polyethylene or polypropylene or polycarbonate.

[0066] It should also be noted that the lighting device DE can be advantageously pre-assembled, which makes it possible to only have to fix it securely to the system it is to equip, such as an optical block BO, for example by screwing at least its plate PL to the housing BB of this optical block BO.

Claims

Demands

1. Lighting device (ED) intended to equip a vehicle and comprising a plate (PL) on which are installed i) a first module (ME1) comprising a source generating photons and a first lens (L1) acting on said generated photons so that they are directed towards a first front zone (ZA1) and participate in a first part of a photometric function of dipped beam, and ii) a second module (ME2) comprising a source generating photons and a second lens (L2) acting on said generated photons so that they are directed towards a second front zone (ZA2) located below said first front zone (ZA1) and participate in a second part of said photometric function,characterized in that it further comprises a third module (ME3) installed on said platform (PL) and coupled in movement to said second module (ME2), and comprising a photon-generating source and a third lens (L3) acting on said generated photons so that they are directed towards said second front zone (ZA2) and participate in said second part of the photometric function, and in that said first module (ME1) is translatable relative to said platform (PL) along a first direction in order to be positioned independently of said second (ME2) and third (ME3) modules to define a cutoff line, said first lens (L1) is of the plano-convex type, and said second (L2) and third (L3) lenses are of the plano-concave type.

2. Device according to claim 1, characterized in that said first direction is parallel to a vertical direction of said vehicle.

3. Device according to claim 1 or 2, characterized in that said plate (PL) is translatable along at least a second direction perpendicular to said first direction.

4. Device according to claim 3, characterized in that said second direction is parallel to a transverse direction of said vehicle.

5. Device according to any one of claims 1 to 4, characterized in that said first module (ME1) is offset forward relative to said second (ME2) and third (ME3) modules along a third direction perpendicular to said first direction and parallel to a longitudinal direction of said vehicle.

6. A device according to any one of claims 1 to 5, characterized in that said second module (ME2) is offset with respect to said third module (ME3) following said first direction.

7. Device according to any one of claims 1 to 6, characterized in that each of said first (ME1), second (ME2) and third (ME3) modules comprises upper (Cl) and lower (C2) shells, each having an elongated shape in the direction of said first (ZA1) and second (ZA2) front zones, and joined together by defining an internal space (El) in which said first (L1), second (L2) or third (L3) lens is fixedly installed, said upper shell (Cl) comprising a first rear part (PR1) defining a housing (LA), in which said source is at least partially installed, and coupled to said plate (PL).

8. Vehicle optical unit (OU), characterized in that it comprises a lighting device (WD) according to one of the preceding claims.

9. Vehicle, characterized in that it comprises at least one optical unit (OU) according to claim 8.