Optical system support for a light pattern projection device for a vehicle

Abstract

The invention relates to a lighting device (100a) for a vehicle, the lighting device being configured to project a light pattern onto a surface of an environment of the vehicle. Specifically, the lighting device comprises an illumination assembly (97), a micromirror array device (98) and an optical projection system (99) which cooperate with one another and generate the light pattern. The optical projection system (99) comprises a housing (10) that comprises an upstream section (10a) comprising a base lens (99a) and a downstream section (10b) configured to accommodate a series of lenses (99b) having increasing diameters arranged along the projection axis (Ap). The upstream section (10a) comprises an entrance notch (10e) and an exit notch (10s) for allowing light beams to propagate along an incident axis (Ai) to the base lens (99a) and for allowing light beams to pass outside the optical path along an exit axis (As).

Description

Optical system support for a vehicle light sketch projection device.

[0001] The present invention relates to a lighting device for a vehicle, more particularly a light projection device for a vehicle. Technological background

[0002] The lighting systems of motor vehicles today fulfill several functions, such as illuminating and / or defining a vehicle's light signature. Among these lighting systems, some are used to project light patterns around the vehicle they are mounted on.

[0003] Thus, there are devices installed in vehicles that project a logo, personalized welcome messages, or designs, for example, linked to a vehicle door and projecting a logo onto the ground in front of that door when the vehicle is unlocked and / or when the door is opened. Such devices are installed, for example, in the door itself, in a rearview mirror connected to the door, or even in a rocker panel near the door.

[0004] These light projection devices, hereafter referred to as lighting devices, add a touch of personalization and style to the vehicle, while also providing a practical function for illuminating the ground around the vehicle in the dark. Such lighting devices can be integrated, for example, into the exterior silhouette of a vehicle. These lighting devices typically include numerous components, such as a light source, an electronic circuit board, optical elements capable of guiding light beams, and decorative elements.

[0005] These lighting devices must meet several requirements, including robustness, compactness, lightness, aesthetics, cost-effectiveness, and maintainability. Compactness, for example, allows these devices to be integrated into numerous locations on the vehicle, both inside and outside the passenger compartment. Miniaturizing such devices is a key factor in making them more widely available and offering users a wide range of applications.

[0006] Therefore, to make these devices more compact and lightweight, the various components of these lighting devices must be grouped together in confined spaces. However, bringing the different components closer together creates constraints, for example optical ones, as some components may be too close or even interfere with light beams emitted and / or reflected by other components. Summary of the present invention

[0007] The present invention overcomes the technological background problems described above by designing a compact lighting device that can then be easily integrated into a small volume available in a vehicle, for example, an automobile.

[0008] To this end, the invention relates firstly to a lighting device for a vehicle, the device being configured to project a luminous representation onto a surface of the vehicle's environment, the lighting device comprising: - an illumination assembly including a light source configured to generate a set of light beams, the set of light beams propagating along an incident axis, - a micromirror array device configured to reflect, at a first angle of reflection, a first subset of light beams from the set of light beams and, at a second angle of reflection, a second subset of light beams from the set of light beams, and - an optical projection system comprising a set of lenses,the optical projection system being configured to guide the first subset of light beams and generate the light representation on the surface along a projection axis, characterized in that the optical projection system comprises a housing in which is arranged the set of lenses forming an optical path, the housing comprising an upstream section and a downstream section juxtaposed to each other, the downstream section being configured to receive a succession of lenses from the lens set of increasing diameters arranged along the same first optical axis constituting the projection axis, the lens of smallest diameter being positioned on the side of the upstream section, the upstream section comprising at its end opposite the downstream section a base lens of the lens set, the end being configured so that the base lens has a second optical axis forming an angle of inclination with the first optical axis,The upstream section comprises an entry notch and an exit notch, the entry notch being configured to allow the propagation of the entire light beam along the incident axis to the base lens, the exit notch being configured to allow the passage of the second subset of light beams outside the optical path along an exit axis, and the optical path being configured to propagate the first subset of light beams through the lens assembly.

[0009] Such a lighting system allows the various components of the lighting device to be brought closer together, thus occupying a limited volume. The notches in the support allow the illumination assembly and the micromirror array to be brought closer together by permitting light beams to pass through the support itself, preventing any optical interference between these different components of the lighting system while ensuring its proper functioning. The support, in turn, allows the lenses to be arranged to achieve the desired optical effect.

[0010] According to an advantageous embodiment, the projection axis, the incident axis and the second optical axis are contained in the same plane.

[0011] According to an advantageous embodiment, the angle of inclination between the projection axis and the second optical axis is between 2° and 6°, preferably on the order of 4°.

[0012] According to an advantageous embodiment, the incident axis forms an angle of approximately 4° to 8°, preferably 6°, with the second optical axis.

[0013] According to an advantageous embodiment, the housing comprises cylindrical bores, each cylindrical bore being configured to receive a lens from the lens assembly and arranged along an optical axis associated with said lens.

[0014] According to an advantageous embodiment, the lens sequence comprises four lenses.

[0015] According to an advantageous embodiment, the housing is made in one single piece from a material such as aluminium, aluminium alloy or plastic.

[0016] According to an advantageous embodiment, the housing is configured to receive and position the illumination assembly and the micromirror matrix device relative to the lens assembly of the projection optical system.

[0017] The invention also relates to a vehicle equipped with a lighting device having at least one of the above characteristics, the lighting device being configured to project a luminous representation onto a surface in the environment of the vehicle.

[0018] According to an advantageous embodiment, the vehicle includes a lower body, the lighting device being arranged in the lower body and configured to project a luminous representation onto a ground surface outside the vehicle.

[0019] According to an advantageous embodiment, the lighting device is configured to project onto the ground surface a luminous representation with a length of approximately 2800mm and a width of approximately 660mm.

[0020] Thus, thanks to all the functional and structural technical characteristics of the present invention, a particularly compact and functional lighting device is available. Its integration into a vehicle is therefore facilitated, allowing it to be positioned judiciously to obtain the desired lighting display. Brief description of the figures

[0021] The features and advantages of the present invention will become apparent from the description below, which is based on figures, among which: - Figure 1 represents a perspective view of a lighting device according to the present invention, according to a first particular embodiment; - Figure 2 represents a vehicle carrying the lighting device, according to a particular embodiment; - Figure 3 represents a perspective view of a lighting device according to the present invention, according to a second particular embodiment; and - Figure 4 represents a cross-sectional view of the lighting device, according to a second particular embodiment. Description of examples of achievements

[0022] Examples of a lighting device will now be described with reference to Figures 1 to 4. According to these examples, the lighting device is designed to project a luminous representation onto a surface in the vehicle's environment, the vehicle being, for example, a car. The luminous representation can, for example, accommodate a vehicle user. Such a lighting device is intended to be mounted, for example, in a vehicle's underbody to project the luminous representation onto the ground, or in a dashboard to project a luminous representation onto the windshield or headliner. However, the invention is not limited to this particular embodiment and extends to any lighting device capable of projecting a luminous representation onto a surface in the vehicle's environment or even onto the vehicle itself, for example, from a door or a rearview mirror.

[0023] Indeed, the lighting device comprises an illumination system including a light source, a micromirror array, and an optical projection system that work together to generate the light image. The optical projection system includes a housing with an upstream section containing a base lens and a downstream section configured to receive a series of lenses of increasing diameters arranged along the projection axis. The upstream section includes an entrance notch and an exit notch to allow the propagation of light beams along an incident axis to the base lens and the passage of light beams outside the optical path along an exit axis.

[0024] Figure 100a represents a perspective view of a lighting device 100a according to the present invention, based on a first particular embodiment. The lighting device 100a comprises an illumination assembly 97 including a light source 97a generating a set of light beams, the set of light beams propagating from the illumination assembly 97 along an incident axis A i The light source 97a, for example, is monochrome and produces a monochrome graphic representation. In a variant, the light source 97a is polychrome, thus projecting a colored light representation.

[0025] The light source 97a is, for example, associated with an electronic board or printed circuit board (PCB) on which is arranged an array of at least one light-emitting diode, known as an LED (Light-Emitting Diode). Each array of at least one LED is configured so that the emitted light, i.e., the light beams from the array of light beams, is directed to a micromirror array device 98, known as a DMD (Digital Micromirror Device) and also as a DLP chip (Digital Light Processing). In other embodiments, the light source 97a includes a light emitter such as a bulb or a laser.

[0026] The DMD 98 is an optoelectronic component used primarily in video projectors, printers, and other optical image processing applications. The DMD 98 comprises thousands, or even millions, of individual micromirrors, each electronically controlled. These micromirrors are arranged in an array on the chip's surface, with each micromirror representing a pixel of an image projected by reflecting light beams off them. Each micromirror can switch between two positions: a first position that reflects a beam of light from the array at a specific angle of reflection, and a second position that reflects the same beam at a different angle of reflection.The light beams of the set of light beams reflected according to the first angle of reflection form a first subset of light beams while the light beams of the set of light beams reflected according to the second angle of reflection form a second subset of light beams.

[0027] The optical projection system 99 comprises a set of lenses forming an optical path and is configured to guide the first subset of light beams through each of the lenses it includes and generate the light representation on the surface, also called the projection surface, along a projection axis A pThe projection surface then acts as a screen. Each light beam from the first subset of light beams creates a point of light on the projection surface, i.e., a "lit" pixel, while when a micromirror is tilted into the second position, the light beam from the second subset of light beams is reflected in another direction and is lost, thus "turning off" a corresponding point of light on the projection surface.

[0028] Thus, the DMD 98 is configured to reflect light beams from the entire light beam system. Each micromirror is, for example, individually controlled by electronic signals. These signals are generally generated by a specialized processor that handles the video data to be displayed; such a processor could be, for example, an onboard computer in the vehicle. Depending on the image and / or video to be projected, the micromirrors are tilted appropriately to reflect the light at a first or second angle of reflection and form illuminated or unlit pixels on the screen.

[0029] Typically, the illumination system is positioned at a distance from the lens assembly of the projection optical system and from the projection axis so that the light beams are emitted along an incident axis whose direction is close to the normal to the projection axis. This allows the DMD to be placed at the intersection of the incident axis and the projection axis and tilted to obtain a first angle of reflection close to 45° (forty-five degrees).Thus, it is easy to reflect a beam of light towards the lens assembly of the projection optical system arranged along the projection axis or, conversely, away from the lens assembly of the projection optical system along an output axis. A micromirror with an angle of inclination, for example, between -12° and +12°, allows for a second angle of reflection close to 20° or 70° to direct the light beams away from the lens assembly of the projection optical system, the light beams being reflected at this second angle of reflection. When the lighting device 100a is not constrained by volume or space, the projection optical system 99 can, in particular, be placed at a sufficient distance from the light beams reflected at the second angle of reflection so as not to receive them and thus avoid any light pollution of the graphic representation.However, in this invention, the lighting device 100a must be compact. Thus, the light source 97 is placed as close as possible to the optical projection system 99, that is to say, near the projection axis A. p , the incident axis A i the second optical axis A o and the projection axis A p are thus particularly close together and, according to the specific implementation example illustrated, the angle of inclination between the projection axis A p and the second optical axis A o is between 2° and 6°, preferably around 4°, while the incident axis A i shape with the second optical axis A o an angle of approximately 4° to 8°, preferably 6°. It should be noted that, in this particular example, the incident axis A i the second optical axis A o and the projection axis A p are included in the same plan.

[0030] Still with the aim of minimizing the size of the light device 100a, the DMD 98 is attached to the base lens 99a, on the opposite side of the optical projection system 99.

[0031] Thus, a beam of light emitted by the light source 97a propagates along the incident axis A i The light beam exits the illumination system, passing through the base lens 99a to reach a reflective surface of a micromirror in the DMD 98. Depending on the micromirror's orientation, the light beam is either reflected at the first angle of reflection or at the second angle of reflection. If the light beam is reflected at the first angle of reflection, it passes through the base lens 99a in the opposite direction to its initial passage and exits the base lens 99a along the second optical axis A. o, and encounters each lens in turn of the 99b lens sequence while propagating along the projection axis A p After passing through the last lens in the series of lenses 99b, the light beam leaves the light device 100a and travels towards the projection surface to form a luminous pixel of the light representation. If the light beam is reflected at the second angle of reflection, the reflected light beam then passes through the base lens 99a in the opposite direction to the first passage and exits the base lens 99a along the exit axis A. s to leave the light device 100a and disappear, the pixel of the light representation associated with the inclined micromirror in the second position is then dark because it is not illuminated by the disappearing light beam.

[0032] The lens assembly of the projection optical system 99 is held by a housing 10. The housing 10 comprises an upstream section 10a and a downstream section 10b placed side by side. The downstream section 10b is configured to receive a series of lenses 99b from the lens assembly, and the upstream section 10a is configured to receive, at its end opposite the downstream section 10b, a basic lens 99a from the lens assembly. The lenses of the lens assembly 99b, that is, the lenses placed in the downstream section 10b, have increasing diameters and are arranged along the same first optical axis, which constitutes the projection axis A. pThe lens with the smaller diameter is positioned on the upstream side of section 10a. It should be noted that the lens diameters are, according to a first specific embodiment, strictly increasing, and are, according to the example illustrated in Figure 1, not strictly increasing. Indeed, in Figure 1, the two lenses 99b located in the middle of the downstream section 10b have approximately the same diameter. The end of the upstream section 10a is configured so that the base lens 99a has an optical axis corresponding to the second optical axis A. o the second optical axis A o being inclined with respect to the projection axis A p .

[0033] According to the particular embodiment illustrated, the housing 10 comprises cylindrical sections, each cylindrical section including a cylindrical bore configured to receive a lens 99a, 99b from the lens assembly and arranged along an optical axis associated with the lens 99a, 99b. Thus, the housing 10 allows for the precise positioning of each lens from the lens assembly and holds them in place to ensure the correct assembly of the projection optical system 99. In one variant, the cylindrical bores allow for clamping of the lenses, the inner diameter of the cylindrical bores being slightly less than or equal to an outer diameter of a lens.According to another embodiment, the inner walls of the cylindrical bores include fine ribs that compress when a lens is inserted, thus holding it in position. The rib allows the lens to be press-fitted into the housing 10 without risk of damaging the lens. The illustrated example has four cylindrical sections in the downstream segment 10b; the lens sequence 99b then comprises four lenses. This number of lenses is defined by the focal lengths of these lenses and by the expected performance of the optical system, in particular the distance between the light source 100a and the projection surface. According to other embodiments, the lens sequence comprises at least two lenses.

[0034] Between each cylindrical section, the housing 10 includes, for example, frustoconical sections connecting each cylindrical section. Such frustoconical sections allow the light beams to travel freely along the optical path without encountering any obstacles. Furthermore, the frustoconical shape facilitates the assembly of the lenses, which are guided as they pass through each section during assembly. Indeed, by first assembling the lens with the smallest diameter in the sequence of lenses in the downstream section 10b, this lens easily passes through each cylindrical section whose radius is greater than that of this lens, the diameters of the lenses decreasing as they travel down the downstream section from the entrance to the housing 10 opposite the upstream section 10a. Similarly, each frustoconical section has a decreasing cross-section that guides the lens to its final position.The invention is not limited, however, to cylindrical sections separated by frustoconical sections; any other shape allowing the free passage of light beams is possible. The advantage of this particular embodiment is that it offers a technical solution enabling the housing 10 to have a relatively constant cross-section, thus optimizing the ratio between its mechanical strength and its mass. Such a housing 10 is, for example, made by injection molding of a thermoplastic such as acrylonitrile butadiene styrene (ABS) or polycarbonate (PC). According to another example, the housing 10 is made in a single piece from a material such as aluminum or an aluminum alloy, by casting or molding followed by machining on a lathe, for example.

[0035] With the illumination assembly 97 placed next to the housing 10 and the DMD 98 positioned behind the base lens 99a, the incident and outgoing light beams, i.e., those emitted by the light source 97a of the illumination assembly 97 towards the base lens 99a, must be allowed to pass along the incident axis A. i and those exiting the base lens 99a and propagating along the exit axis A s Thus, the upstream section 10a includes an inlet notch 10e and an outlet notch 10s, the inlet notch 10e being configured to allow the propagation of the entire light beam assembly along the incident axis A i , up to the base lens 99a, the exit notch 10s being configured to allow the passage of the second subset of light beams, exiting the base lens 99a, outside the optical path along an exit axis A sThe optical path is configured to propagate the first subset of light beams through the lens assembly, and not the second subset. When the different axes lie in the same plane, the notches are, for example, arranged diametrically opposite, their respective contours being symmetrical with respect to the plane containing the incident axes A i and exiting A s In the particular example of implementation illustrated in the figure, the notches thus correspond to two trapezoidal cutouts facing each other.

[0036] Such a luminous device 100a is, for example, placed in an external housing, the external housing positioning and holding each of the components relative to each other. Thus, the illumination assembly 97 is oriented towards the DMD 98, that is, the incident axis A iis oriented towards the center of the DMD 98, and the optical projection system 99 is positioned to guide light beams reflected by the DMD 98 towards the projection surface in the form of a light projection.

[0037] Such an external housing encloses the illumination unit 97, the DMD 98, and the projection optical system 99. The external housing includes, for example, an opening configured to allow the passage of light beams guided by the optical system along the optical path. The external housing comprises, for example, two parts such as shells assembled to make the housing watertight and protect the components inside from external damage. The shells are assembled, for example, using screws, and a gasket is installed in a groove so as to be compressed between the two assembled shells. The external housing also includes, for example, a transparent glazed section that closes the opening and makes the housing watertight and dustproof while allowing the light beams from the optical system 99 to pass through.Thus, the external housing protects the various components from oxidation and / or dirt, which is particularly useful if the lighting device 100a is positioned on an external part of the vehicle, such as a rocker panel. The external housing includes, for example, an opening for installing an electrical connector for powering and controlling the light source 97a of the lighting assembly 97 via the electronic board, if applicable, and the DMD 98. The connector is, for example, watertight when it receives an additional connector, and a seal is implemented between the connector and the opening. Alternatively, the external housing includes, for example, an opening for a cable, such an opening including, for example, a cable gland to ensure the watertightness of the external housing.The invention is not limited, however, to a luminous device 100a enclosed in an external casing; indeed, another open support is sufficient when the luminous device 100a is carried in a vehicle cabin or when the luminous device 100a is installed in a confined environment.

[0038] Figures 3 and 4 show a perspective view and a cross-sectional view of a lighting device 100a according to the present invention, in a second particular embodiment. In this embodiment, the housing 10 and the external housing shown previously form a single unit. The housing 10 is configured to receive and position the lens assembly of the projection optical system 99 via cylindrical bores in it, and also to receive and position the illumination assembly 97 and the DMD 98 relative to the lens assembly. The housing 10 thus includes a first interface zone for positioning the light source 97a and its associated electronic board 97c. In this particular embodiment, the housing 10 also receives and positions another lens assembly comprising, in this example, two lenses 971 and 972 in front of the light source 97a along the incident axis A.i For example, by providing bores of different inner diameters allowing the insertion of a first lens 971 and a second lens 972 until they each reach their stop. The housing 10 also includes a second interface area for positioning the DMD 98. The first and second interface areas optionally include means for attaching the illumination assembly 97, for example its electronic board 97c and / or the lenses 971, 972 of the other lens assembly, and / or the DMD 98, for example clips for holding these elements on the housing 10 or shafts for tightening these elements on the housing 10 by means of fixing screws.

[0039] Such a construction makes it possible to improve the relative positioning of all the components of the lighting device 100a, the lens assembly, the illumination assembly 97 and the DMD 98 being positioned only in relation to the housing 10 which also positions the lens assembly of the optical projection system 99, thus reducing the length of the dimension chains defining the manufacturing tolerances of each of the elements of the lighting device 100a.

[0040] According to this second particular embodiment example, the housing 10 is obtained by:- molding of aluminium or aluminium alloy, or- molding of plastic, for example polycarbonate (PC), acrylonitrile butadiene styrene (ABS) or polyoxymethylene (POM), these materials can also be machined, particularly in the areas receiving the lenses of the lens assembly as well as in the first and second interface areas.

[0041] According to another specific embodiment (not shown), the lighting device 100a further comprises a casing encompassing the projection system 99, the illumination assembly 97, and the DMD 98. This watertight casing isolates these components from the external environment and provides an adequate level of protection depending on the intended use of the lighting device 100a. This casing notably includes an opening centered on the projection axis A. p in order to allow the first subset of light beams to pass through, this opening receives for example a glass pane of complementary shape to that of the opening, round for example and a sealing gasket is then arranged between the walls of the opening and the glass pane in order to preserve the previously defined protection index.

[0042] Incidentally, and as illustrated in the diagram, the 100a lighting device includes a 97r radiator juxtaposed to the 97c electronic board, thus cooling the 97c electronic board and the 97a light source, thereby ensuring good operating conditions for these elements and thus an optimal lifespan.

[0043] Laillustrates a vehicle 100 carrying a light device 100a as shown above, for example according to the particular embodiment illustrated in the, the light device 100a being configured to project a light representation 100b onto a surface of the vehicle's environment.

[0044] According to the embodiment illustrated in Figure 1, the vehicle includes a lower body panel 100c in which the lighting device 100a is arranged. The lighting device 100a is configured to project the light representation 100b onto a ground surface outside the vehicle, for example, in front of a door of the vehicle 100. Thus, a user of the vehicle 100 benefits from an illuminated area in front of the door, the light projection 100b forming a luminous carpet. This light representation allows the user to better perceive any obstacles located in front of the door of the vehicle 100. The light representation also allows a welcome or greeting message to be displayed to this user.

[0045] The light device 100a is, for example, positioned at a distance H from the ground. This distance H, corresponding, for example, to the height of an opening in the light device 100a through which the first set of light beams emerges after traveling the optical path relative to the ground in the case of a flat surface, is, for example, between 150 mm and 300 mm. Placed at a distance H from the projection surface, here the ground, the light device 100a is, for example, configured to project onto the ground surface a luminous representation 100b with a length of approximately 2800 mm and a width of approximately 660 mm.

[0046] Thus, the lighting device comprises a housing that groups all the components, such as the illumination unit, the DMD (Digital Motion Device), and the lenses of the projection optical system, into a very small space. The housing allows for the precise and reliable positioning of the various lenses of the projection optical system and enables light beams emitted by the light source or reflected by the DMD to propagate freely, thereby generating the desired light image. This arrangement of the various components of the lighting device makes it compact and therefore easily integrated into confined spaces. The present invention thus offers a technical solution that is easy to integrate into new vehicles.

[0047] It should be noted that this detailed description relates to a particular embodiment of the present invention, but in no way does this description limit the scope of the invention; on the contrary, its purpose is to remove any possible inaccuracy or misinterpretation of the following claims.

[0048] It should also be noted that the reference signs placed in parentheses in the following claims are in no way intended to be limiting; these signs are solely intended to improve the intelligibility and understanding of the following claims and the scope of the protection sought.

Claims

A lighting device (100a) of a vehicle (100), the device being configured to project a luminous representation (100b) onto a surface of the vehicle's environment (100), said lighting device comprising: - an illumination assembly (97) including a light source (97a) configured to generate a set of light beams, the set of light beams propagating along an incident axis (A i- a micromirror array device (MAD) (98) configured to reflect, at a first angle of reflection, a first subset of light beams from the light beam set and, at a second angle of reflection, a second subset of light beams from the light beam set, and - an optical projection system (99) comprising a set of lenses, said optical system being configured to guide the first subset of light beams and generate the luminous representation (100b) on said surface along a projection axis (A p), characterized in that the optical projection system (99) comprises a housing (10) in which the set of lenses forming an optical path is arranged, said housing (10) comprising an upstream section (10a) and a downstream section (10b) juxtaposed to each other, the downstream section (10b) being configured to receive a succession of lenses (99b) from the set of lenses of increasing diameters arranged along the same first optical axis constituting the projection axis (A p ), the smaller diameter lens being positioned on the upstream section side, the upstream section comprising at its end opposite the downstream section a base lens (99a) of the lens assembly, said end being configured so that the base lens (99a) has a second optical axis (A oforming an angle of inclination with the first optical axis, the upstream section (10a) includes an entrance notch (10e) and an exit notch (10s), the entrance notch (10e) being configured to allow the propagation of the entire light beam assembly along the incident axis (A i ), up to the base lens (99a), the exit notch (10s) being configured to allow the passage of the second subset of light beams outside the optical path along an exit axis (A s ) and the optical path being configured to propagate the first subset of light beams through the lens set. A luminous device according to claim 1, in which the projection axis (Ap), the incident axis (Ai) and the second optical axis (Ao) are contained in the same plane. A lighting device according to claim 1 or 2, wherein the angle of inclination between the projection axis (A p) and the second optical axis (A o ) is between 2° and 6°, preferably around 4°. A lighting device according to any one of claims 1 to 3, wherein the incident axis (A i ) form with the second optical axis (A o ) an angle of approximately 4° to 8°, preferably 6°. A lighting device according to any one of claims 1 to 4, wherein the housing (10) comprises cylindrical bores, each cylindrical bore being configured to receive a lens (99a, 99b) from the lens assembly and arranged along an optical axis associated with said lens (99a, 99b). A lighting device according to any one of claims 1 to 5, wherein the sequence of lenses (99b) comprises four lenses. A lighting device according to any one of claims 1 to 6, wherein the housing (10) is made in one piece from a material such as aluminium, aluminium alloy or plastic. A lighting device according to any one of claims 1 to 7, wherein the housing (10) is configured to receive and position the illumination assembly (97) and the micromirror array device (98) relative to said lens assembly. Vehicle (100) equipped with a lighting device (100a) having the characteristics of any one of claims 1 to 8, the lighting device being configured to project a luminous representation (100b) onto a surface of the environment of the vehicle (100). Vehicle according to claim 9, which includes a rocker panel (100c), the light device (100a) being arranged in the rocker panel (100c) and configured to project a light representation (100b) onto a ground surface outside the vehicle (100). Vehicle (100) according to any one of claims 10 or 11, wherein the light device (100a) is configured to project onto the ground surface a light representation (100b) of a length of approximately 2800mm and a width of approximately 660mm.

Images