Light device for projecting an image onto the ground around a vehicle

Abstract

Title: Luminous device for projecting an image onto the ground around a vehicle Method for manufacturing a luminous device (2), the luminous device comprising:- a light source (3) capable of producing a light beam (F), - a mask (4) comprising a support (7) on which are formed a first pattern (8) and at least one second pattern (9) different from the first pattern, the mask support being movable between a first position and at least one second position, and- a drive means (14), in particular an electric motor, connected to the mask support by a mechanical connection means so as to move the mask support between its first position and its second position, the manufacturing method comprising a step of in situ formation of a pattern on the mask support. Figure to be published with the abstract: Figure 1

Description

Title of the invention: Luminous device for projecting an image onto the ground around a vehicle Technical field of the invention

[0001] The invention relates to a lighting device for a motor vehicle, the lighting device being configured to project an image onto the ground such as a pictogram. The invention also relates to a method of manufacturing such a lighting device. State of the prior art

[0002] Some motor vehicles are equipped with a lighting device configured to project one or more images onto the ground around the vehicle. These lighting devices comprise a light source and a mask, for example a slide, illuminated by the light source. A light beam from the light source passes through the mask and is directed towards the ground around the vehicle so as to project an image. The images thus projected may comprise pictograms intended to provide useful information to a user. For example, when the vehicle is an electric or plug-in hybrid vehicle, the image projected onto the ground may provide an indication of the state of charge of a battery of the vehicle. A pictogram representing the state of charge of a battery may conventionally comprise the drawing of a cell provided with different stages, these stages being represented full or empty depending on the state of charge.

[0003] In order to improve the visual effect and the quality of the information transmitted to the user, it is desirable to project dynamic images onto the ground. For example, to inform a user that the battery of a vehicle is being recharged, at least one level of the battery design can be made scalable.

[0004] In order to animate the image projected on the ground, luminous devices are known which are provided with a mask in the form of a disc whose orientation is controlled by an electric motor. The mask comprises several patterns distributed over different sectors of the disc. The different sectors are intended to be selectively illuminated by the light source depending on the orientation of the mask. Such a solution therefore makes it possible to vary the image projected on the ground by rotating the mask. This makes it possible to produce an animation, in particular an evolving effect of the image projected on the ground.

[0005] However, it is observed with existing lighting devices that the different images projected on the ground are spatially offset from each other. This offset is particularly noticeable when the successively projected images have common parts. Thus, the visual rendering of dynamic images comprising fixed parts and evolving parts is particularly poor with the known lighting devices of the state of the art.

[0006] To limit this offset, it is known to use an electric motor whose rotor orientation can be controlled with great precision. Such electric motors are nevertheless expensive and complex to use. It is also known to produce the patterns on the mask with great precision, for example by forming these patterns by lithography. This manufacturing technique is also expensive and complex to implement. It is also known to increase the size of the patterns on the mask to mitigate the consequences of an imprecise orientation of this mask. However, this leads to increasing the size of the mask and / or to limiting the number of different patterns that the mask contains. An increase in the size of the mask leads to an increase in the size of the lighting device.The lighting device may then be incompatible with integration into vehicle locations where the available volume is low, for example at the level of an exterior rearview mirror or at the level of a vehicle door sill. Presentation of the invention

[0007] The aim of the invention is to provide a lighting device and a method of manufacturing such a lighting device which overcomes the above drawbacks and improves the lighting devices known from the prior art and their manufacturing methods.

[0008] More specifically, a first object of the invention is a lighting device which is both simple and makes it possible to project an image onto the ground, the position of which is very well controlled. Summary of the invention

[0009] The invention relates to a method of manufacturing a luminous device, the luminous device comprising: - a light source capable of producing a light beam, - a mask comprising a support on which are formed a first pattern and at least one second pattern different from the first pattern, the support of the mask being movable between a first position and at least one second position, the first pattern being positioned through the light beam when the support of the mask is in its first position to project a first image onto the ground, the second pattern being positioned through the light beam when the support of the mask is in its second position to project a second image onto the ground different from the first image, and - a drive means, in particular an electric motor, linked to the mask support by a mechanical connection means so as to move the mask support between its first position and its second position, the manufacturing method comprising: - a step of connecting said mask support to said drive means by said mechanical connecting means, then - a step of forming said first pattern on the mask support, the mask support being in its first position, then - a step of moving the mask support from its first position to its second position by activating the drive means, then - a step of forming said second pattern on the mask support, the mask support being in its second position.

[0010] Said drive means may be an electric stepper motor.

[0011] The drive means may be an electric motor, and the mask support may be securely attached to a rotating shaft of the electric motor.

[0012] The first pattern and the second pattern may be formed on the mask support by ablation of an opaque layer formed on the surface of the mask support by means of a laser beam and / or by projection of an ink jet onto the mask support.

[0013] The light device may comprise a holding element to which the light source and the drive means are fixed, the manufacturing method comprising a step of fixing the light source and fixing the drive means to the holding element prior to the step of forming the first pattern on the mask support.

[0014] The light device may comprise at least one optical component intended to be traversed by the light beam produced by the light source, the manufacturing method comprising a step of assembling the optical component after the formation of all the patterns on the mask support.

[0015] The light device may comprise an electrical connector intended to be electrically connected to an electronic control unit of a motor vehicle, said activation of the drive means for moving the mask support from its first position to its second position being carried out by connecting an electronic manufacturing control unit to said electrical connector.

[0016] The first image and the second image intended to be projected by the light device may comprise at least one common part.

[0017] At least one third pattern different from the first pattern and the second pattern can be formed on the mask support, the mask support being movable between a first position, a second position, and at least one third position, the third pattern being positioned across the light beam when the mask support is in its third position to project a third image onto the ground, different from the first image and the second image, the drive means being configured to move the mask support between its first position, its second position, and its third position, the manufacturing method comprising: - a step of moving the mask support from its second position to its third position by activating the drive means, then - a step of forming the third pattern on the mask support, the mask support being in its third position.

[0018] The invention also relates to a light device obtained by the manufacturing method as defined above. Presentation of figures

[0019] These objects, characteristics and advantages of the present invention will be explained in detail in the following description of a particular embodiment made without limitation in relation to the attached figures among which:

[0020] [Fig.l] is a schematic view of a motor vehicle equipped with a lighting device according to one embodiment of the invention, the lighting device being shown in section.

[0021] [Fig.2] is a schematic front view of a mask of the light device according to an embodiment of the invention.

[0022] [Fig. 3] is a schematic top view of the vehicle projecting a first image by means of the light device.

[0023] [Fig.4] is a schematic top view of the vehicle projecting a second image by means of the light device.

[0024] [Fig.5] is a schematic top view of the vehicle projecting a third image by means of the light device.

[0025] [Fig.6] is an exploded perspective view of the light device.

[0026] [Fig.7] is a schematic representation of a manufacturing step of the device luminous of [Fig.l].

[0027] [Fig.8] is a schematic representation of a succession of manufacturing steps of the light device of [Fig.l]. Detailed description

[0028] [Fig.l] schematically illustrates a motor vehicle 1 equipped with a lighting device 2 according to one embodiment of the invention. The vehicle 1 may be, for example, a private vehicle, a utility vehicle, a truck or even a bus. The lighting device 2 is configured to project an image onto the ground around the vehicle. The image may, for example, be projected a few tens of centimeters onto the ground along one side of the vehicle 1. The lighting device 2 may, for example, be attached to the vehicle at an exterior rearview mirror of the vehicle or at the level of a vehicle door sill 1.

[0029] The lighting device 2 comprises a light source 3 capable of producing a light beam F and a mask 4 positioned on the path of the light beam F. The mask 4 comprises a plurality of patterns, each pattern being configured to modify the light beam F coming from the light source 3 so as to project an image onto the ground. Each image projected onto the ground may comprise information on the state of the vehicle and / or on the environment of the vehicle. The projection of the image onto the ground aims to provide information and / or to produce an aesthetic effect. Advantageously, the image projected onto the ground is in the form of one or more pictograms.

[0030] As a note, the lighting device 2 is not intended to produce lighting of the vehicle's surroundings, or to make the vehicle clearly visible to other road users. Thus, the lighting device 2 is distinguished from the headlights usually fitted to vehicles and which have main beam headlights and / or dipped beam headlights.

[0031] The light source 3 may, for example, be a light-emitting diode or a set of light-emitting diodes. Alternatively, it could take any other form, for example an incandescent lamp. Advantageously, the light source 3 may have sufficient power to project an image onto the ground that is visible even in broad daylight. Preferably, the light source 3 may project white-colored light rays. The light source 3 is electrically connected to a first printed circuit board 5. The first printed circuit board 5 is held by a holding element 6, itself fixed directly or indirectly to a structural element of the vehicle 1.

[0032] The mask 4 is movable relative to the light source 3 in as many positions as it comprises patterns. For each position of the mask 4, one of its patterns extends into an illumination zone ZI corresponding to the projection of the light beam F onto the mask 4. With reference to [Fig. 2], the mask 4 comprises a support 7 and a plurality of patterns 8, 9, 10 arranged on a surface of the support 7. In particular, the support 7 of the mask advantageously comprises the shape of a disc and the patterns 8, 9, 10 are each positioned in a distinct angular sector of the disc. The mask 4 may comprise any number of patterns greater than or equal to two, for example between two and ten patterns, or even between two and twenty patterns. Each pattern of the mask 4 is configured to intercept or filter the light rays coming from the light source 3 so as to produce an image.

[0033] According to one embodiment, the support 7 may comprise a transparent material, for example transparent plastic or glass. Each pattern may then be formed by an opaque layer deposited on the transparent support 7. When the light pattern is positioned in the lighting zone Zl, the opaque parts intercept the light rays coming from the light source 3, and the transparent parts let the light rays coming from the light source 3 pass through.

[0034] In [Fig. 2], the mask 4 comprises three patterns 8, 9, 10 representing a battery with different states of charge. Figures 3, 4 and 5 respectively illustrate three examples of images 11, 12, 13 likely to be projected by the light device 2. A first image 11, illustrated in [Fig. 3], is a first pictogram of a battery with three full stages. The first image 11 is obtained when the first pattern 8 of the mask 4 is positioned in the lighting zone ZL. A second image 12, illustrated in [Fig. 4], represents a second pictogram of a battery with two full stages. The second image 12 is obtained when the second pattern 9 is positioned in the lighting zone ZL. A third image 13, illustrated in [Fig. 5], represents a pictogram of a battery with a single full stage.The third image 13 is obtained when the third pattern 10 is positioned in the lighting zone ZL. The successive projection of these three images 11, 12, 13 makes the second stage and the third stage of the battery pictogram evolving, in particular flashing. Such an effect provides an indication that a battery of the vehicle is being recharged. These three pictograms 11, 12, 13 comprise a common part, namely the rectangular outline of the battery as well as the first stage of the battery. It is therefore understood that it is desirable for this common part to be positioned as well as possible in the same place on the ground when moving from one pictogram to another, so as to produce a quality display.

[0035] Alternatively, the light device could of course be configured to provide different images, for example pictograms giving information on climatological conditions and / or on the state of the vehicle and / or on the trajectory followed by the vehicle. The pictograms could for example represent snowflakes, a thermometer, direction arrows, etc.

[0036] According to one embodiment, the mask 4 comprises a disk extending in a plane, and is movable in rotation about an axis of rotation perpendicular to the plane in which the disk extends. The axis of rotation passes through the center of the disk. As a note, in [Fig.2], the three patterns 8, 9 and 10 are distributed around a center of the mask 4. A rotation of the disk of 120° is necessary to change the pattern present in the lighting zone ZL. Alternatively, the patterns could also be arranged in narrower angular sectors, in order to limit the amplitude of rotation of the mask 4 to change the pattern present in the lighting zone Zl and / or in order to accommodate a greater number of patterns on the mask 4.

[0037] To move the mask 4 between its different positions, the light device 2 further comprises a drive means 14 linked to the support 7 of the mask by a mechanical connecting means. Preferably, the drive means is an electric motor. The electric motor comprises a casing 16, or stator, fixed to the holding element 6, and a rotating shaft 17, or rotor, to which the support 7 of the mask 4 is fixed. The shaft 17 passes through an opening 21 provided in the first printed circuit board 5.

[0038] The electric motor is advantageously a stepper electric motor. A stepper electric motor is configured to transform an electrical pulse into an angular movement. This type of electric motor makes it possible to control the orientation of the shaft 17 in an open loop. The electric motor may be, for example, a variable reluctance motor, a permanent magnet motor, or a hybrid motor, which is a combination of these two technologies. The electric motor is electrically connected to a second printed circuit board 18 configured to supply electrical energy and control the electric motor. In particular, the second printed circuit board 18 may be configured to generate inversions of a supply current of the electric motor. The shaft 17 of the electric motor may thus rotate by a given step at each inversion of the supply current. The electric motor may, for example, comprise 48 steps per revolution.Alternatively, this number could be different. A stepper motor is simple to manufacture and use. Such a motor may also have a certain inaccuracy, in particular due to disparities during its manufacture and / or due to a lack of precision in the supply current injected into the coils of such a motor. The rotation of the shaft corresponding to one step of the electric motor may thus be different from 360° divided by the total number of steps of the electric motor. This inaccuracy may be, for example, of the order of 0.5°. As we will see later, the manufacturing process of the lighting device makes it possible to erase this potential inaccuracy.

[0039] The lighting device 2 further comprises an electrical connector 19 connected to an electronic control unit 20 of the vehicle. As shown in the figures, the electrical connector 19 can be fixed to the second printed circuit board 18. In this case, the first printed circuit board 5 is advantageously electrically connected to the second printed circuit board 18, for example by means of an electrical ribbon cable. Alternatively, the electrical connector 19 could also be fixed to the first printed circuit board 5. The printed circuit boards 5, 18 are integral with the holding element 6.

[0040] According to the embodiment presented, the support 7 of the mask 4 is fixed to the shaft 17. In particular, the support 7 is glued to a distal end of the shaft 17. Advantageously, the distal end of the shaft 17 comprises a flat face extending perpendicular to the axis of rotation of the shaft 17 to provide a sufficient gluing surface for gluing the support 7. The mechanical connection means connecting the support 7 to the drive means 14 is therefore a fixing means of the embedding type. According to an alternative embodiment, the mechanical connection means connecting the support 7 to the drive means 14 could be different. It could in particular comprise a more complex mechanical connection, comprising for example articulated parts, and / or pinions and / or gears and / or belts.

[0041] The lighting device 2 also comprises a collimator 22 and optical components 23 such as lenses, possibly arranged in an optical barrel, configured to shape the light beam F produced by the light source 3. The collimator 22 is positioned upstream of the lighting zone ZI in the direction of propagation of the light rays. The optical components 23 are positioned downstream of the lighting zone ZI in the direction of propagation of the light rays. The collimator 22 and the optical components 23 can be sized according to the size of the mask 4, according to the position of the lighting device within the vehicle 1, as well as according to the size of the images projected on the ground.

[0042] The light device 2 further comprises a stop element 26, bearing against a front face of the support 7 of the mask, opposite the shaft 17. The stop element 26 passes through an opening provided in the holding element 6. The stop element 26 improves the rotational guidance of the mask 4.

[0043] [Fig. 6] illustrates in more detail certain aspects of the lighting device 2. In particular, the lighting device 2 is housed in a housing comprising a receptacle 24 and a cover 25 closing the receptacle 24. The receptacle 24 comprises a housing inside which are integrated the holding element 6, the printed circuit boards 5 and 18, the light source 3, the drive means 14, the mask 4, the collimator 22 and the optical components 23. The holding element 6 is in the form of a single-piece element, preferably made of plastic, and preferably obtained by molding. The holding element 6 comprises a first groove into which the first printed circuit board 5 is inserted, a second groove into which a flange of the casing 16 of the electric motor is inserted, and a third groove into which the second printed circuit board 18 is inserted.The two printed circuit boards 5 and 18 as well as the housing flange 16 extend parallel to the same plane. The holding element 6 further comprises an opening 27 in which the optical components 23 are inserted and locked in position. The opening 27 has a cylindrical shape whose axis of revolution passes through the light source 3. The receptacle 24 comprises a rear opening allowing access to the electrical connector 19. The cover 25 comprises a protective glass covering the optical components 23.

[0044] To obtain precise positioning of the images 11, 12, 13 projected by the light device 2, the light device is manufactured according to a method of fa original brication which will now be described. The general principle of this manufacturing method is based on the formation of the patterns 8, 9, 10 on the support 7 after the assembly of the support 7 by the drive means 14, that is to say after the establishment of the mechanical connection connecting the support 7 to the drive means 14. The correct orientation of the support 7 for the formation of the patterns is obtained by using the drive means 14 of the light device 2, and not a drive means specific to a manufacturing unit. This way of forming the patterns on the support advantageously makes it possible to overcome positioning defects linked to the imprecision of the drive means 14 and / or linked to the imprecision of the mechanical connection between the support 7 and the drive means 14.

[0045] To manufacture the light device 2 which has just been described, the procedure is as follows. First of all, in a first step, the holding element 6, the support 7 of the mask 4, the first printed circuit board 5 provided with the light source 3, the drive means 14, and the second printed circuit board 18 are provided separately. The support 7 is then devoid of any pattern. The support 7 can be completely coated with an opaque layer intended to be removed locally. Alternatively, the support 7 can be devoid of any opaque layer. Advantageously, the support then has a symmetry of revolution around its axis of rotation.

[0046] Then, in a second step, the support 7 is assembled to the shaft 17 of the drive means 14. In this case, the support 7 is glued to the flat face provided at the end of the shaft 17. The support 7 is therefore secured to the shaft 17. As the support has a symmetry of revolution, it is not useful to index the position of the support prior to its connection with the shaft 17. As we will see later, a possible centering defect between the support 7 and the shaft 17 will not create any inaccuracy on the images projected by the light device 2. The step of assembling the support 7 to the shaft 17 can thus be simplified.

[0047] Then, in a third step, a module 28 is manufactured by assembling the first printed circuit board 5, the drive means 14 secured to the support 7, and the second printed circuit board 18 to the holding element 6. After assembly of the holding element 6, at least a portion of one face of the support 7 remains accessible so as to allow the formation of a pattern on this portion. In particular, a portion of the front face of the support 7 is accessible via the opening 27 provided in the holding element 6.

[0048] Then, in a fourth step, the module 28 can be held by a holding tool provided for this purpose. For example, the holding tool prevents the module 28 from moving by means of the holding element 6. The holding tool can for example comprise a housing which matches certain shapes of the holding element 6. The module 28 can be held so that the front face of the support 7 is facing upwards. The support 7 is then in a first position. This first position can be defined arbitrarily since the support is devoid of any pattern and therefore has a symmetry of revolution.

[0049] Then, in a fifth step, the module 28 is connected to an electronic manufacturing control unit 29. The electronic manufacturing control unit 29 is a piece of equipment in a manufacturing workshop adapted to connect to the electrical connector 19. The electronic manufacturing control unit 29 is capable of providing electrical signals having the same characteristics as the electrical signals sent by the electronic control unit 20 of the vehicle. In particular, the electronic manufacturing control unit 29 is capable of controlling the drive means 14, and more specifically of controlling the rotation of the shaft 17 in the same way as the electronic control unit 20 previously described.

[0050] Then, in a sixth step, a first pattern is formed on the support 7. According to a first embodiment, illustrated in [Fig. 7], the first pattern is formed on the support 7 of the mask by ablation of an opaque layer formed on the surface of the support 7 by means of a laser beam 30. According to this first embodiment, the support 7 is therefore previously entirely coated with an opaque layer, for example a metal deposition layer. The opaque layer is locally removed so as to form said first pattern. A laser beam generator 31 is positioned directly above the front face of the support and is configured to emit a laser beam 30 oriented substantially perpendicular to the plane in which the support 7 extends. Advantageously, the laser beam 30 passes through the opening 27 of the holding element 6.The orientation of the laser beam 30 is therefore substantially parallel to the orientation of the light rays emitted by the light device when it is in operation. The precise orientation of the laser beam 30 can be controlled so that the laser beam scans the surface of the pattern to be created. By impacting the opaque layer on the surface of the support 7, it peels off and reveals the underlying transparent material. Advantageously, the optical components 23 are not yet mounted assembled on the module 28 at this stage of the manufacturing process. This prevents deposits from the opaque layer from contaminating the optical components 23.

[0051] According to a second embodiment, the first pattern is formed on the support 7 of the mask by projecting an ink jet onto the support of the mask. According to this first embodiment, the support 7 is therefore previously entirely transparent and the opaque layer is formed locally by depositing an ink. The formation of a pattern by laser ablation and / or by ink jet has the advantage of being relatively simple to implement compared to a lithography method. Indeed, the lithography method comprises numerous relatively complex steps. Such a method would be more complex to implement on a support preassembled to the module 28. Pattern formation processes using laser ablation and / or ink jet may possibly be less precise than the pattern formation process using lithography. However, this is not a problem, as these possible inaccuracies are compensated for by other steps in the manufacturing process of the light module, which, on the contrary, are more precise.

[0052] Then, in a seventh step, when the first pattern has been formed on the support 7, the support 7 is moved from its first position to its second position by activating the drive means 14. To do this, the electronic manufacturing control unit 29 issues a control command which is received by the module 28 via the electrical connector 19. Subsequently, the shaft 17 of the motor rotates by one or more steps. The support 7, fixed to the shaft 17, therefore pivots around its axis of rotation to its second position. Then the second pattern can be formed on the support in the same way as for the first pattern, in particular by using a laser ablation method and / or an ink projection method. The sixth step and the seventh step are thus repeated so as to form all the patterns on the support 7 as illustrated in [Fig.8].The mask 4 is thus manufactured “in situ”, that is to say with the mask support 7 already assembled to its drive means 14.

[0053] An advantage of using the drive means 14 to move the support 7 from its first position to its second position is that a movement is produced which is identical to that which will be carried out later, when using the lighting device in the vehicle. Even if the drive means presents a certain inaccuracy in the movement which it imparts to the support, this inaccuracy does not penalize the precision of the lighting device as long as this inaccuracy is repeatable between the moment when the patterns are formed on the support and the moment the lighting module is used. By controlling the drive means 14 via the printed circuit board 18 connected to the manufacturing electronic control unit 29, it is ensured that the control orders received by the drive means 14 are identical to those which it will receive from the electronic control unit 20 of the vehicle 1.The movements of the support following the reception of these control orders will therefore also be identical. The patterns formed on the support are thus ideally positioned according to the drive means 14 associated with this support. In the event that the rotation of the shaft 17 is not uniform for each step of the electric stepper motor, this would result in the manufacture of a mask whose patterns are not distributed uniformly around its axis of rotation. The manufacturing method therefore makes it possible to compensate for the inaccuracy linked to the drive means 14. In addition, the patterns are formed while the support is fixed to the shaft 17. A possible inaccuracy, for example a centering defect, during . the assembly of the support 7 with the shaft 17 has no effect on the precision of the lighting device 2.

[0054] Finally, thanks to the manufacturing method which has just been described, a light device 2 is obtained which is capable of projecting images which are very well positioned in space. The method is simple to implement. In particular, the method of forming the patterns on the mask support can be simplified compared to previously known methods such as lithography. The light device does not require an angular position sensor to accurately know the orientation of the light mask. When the light device is intended to project different images having common parts. These common parts are projected onto the ground at the same location relative to the vehicle, which improves the visual effect perceived by observing the successive projection of these different images.

Claims

Claims

1. A method of manufacturing a light device (2), the light device comprising: - a light source (3) capable of producing a light beam (F), - a mask (4) comprising a support (7) on which are formed a first pattern (8) and at least one second pattern (9) different from the first pattern, the mask support being movable between a first position and at least one second position, the first pattern being positioned across the light beam when the mask support is in its first position to project a first image (11) onto the ground, the second pattern being positioned across the light beam when the mask support is in its second position to project a second image (12) onto the ground different from the first image, and - a drive means (14), in particular an electric motor,linked to the mask support by a mechanical connecting means so as to move the mask support between its first position and its second position, the manufacturing method comprising: - a step of connecting said mask support to said drive means by said mechanical connecting means, then - a step of forming said first pattern on the mask support, the mask support being in its first position, then - a step of moving the mask support from its first position to its second position by activating the drive means, then - a step of forming said second pattern on the mask support, the mask support being in its second position.,

2. Manufacturing method according to the preceding claim, characterized in that said drive means (14) is an electric stepper motor.

3. Manufacturing method according to one of the preceding claims, characterized in that the drive means (14) is an electric motor, and in that the support (7) of the mask is fixed integrally to a rotating shaft (17) of the electric motor.

4. Manufacturing method according to one of the preceding claims, characterized in that the first pattern (8) and the second pattern (9) are formed on the support (7) of the mask (4) by ablation of an opaque layer formed on the surface of the support of the mask by means of a laser beam (30) and / or by projection of an ink jet onto the support (7) of the mask (4).

5. Manufacturing method according to one of the preceding claims, characterized in that the light device (2) comprises a holding element (6) to which the light source (3) and the drive means (14) are fixed, the manufacturing method comprising a step of fixing the light source and fixing the drive means to the holding element prior to the step of forming the first pattern on the mask support.

6. Manufacturing method according to one of the preceding claims, characterized in that the light device (2) comprises at least one optical component (23) intended to be crossed by the light beam (F) produced by the light source (3), the manufacturing method comprising a step of assembling the optical component (23) after the formation of all the patterns (8, 9, 10) on the support (7) of the mask (4).

7. Manufacturing method according to one of the preceding claims, characterized in that the light device (2) comprises an electrical connector (19) intended to be electrically connected to an electronic control unit (20) of a motor vehicle (1), said activation of the drive means (14) for moving the mask support from its first position to its second position being carried out by connecting an electronic manufacturing control unit (29) to said electrical connector.

8. Manufacturing method according to one of the preceding claims, characterized in that the first image (11) and the second image (12) intended to be projected by the light device (2) comprise at least one common part.

9. Manufacturing method according to one of the preceding claims, characterized in that at least one third pattern (10) different from the first pattern (8) and the second pattern (9) is formed on the support of the mask, the support (7) of the mask (4) being movable between a first position, a second position, and at least one third position, the third pattern being positioned across the light beam (F) when the support of the mask is in its third position to project a third image (13) onto the ground, different from the first image (11) and the second image (12), the drive means (14) being configured to move the mask support between its first position, its second position, and its third position, the manufacturing method comprising: - a step of moving the mask support from its second position to its third position by activating the drive means, then - a step of forming the third pattern on the mask support, the mask support being in its third position.

10. Luminous device (2) obtained by the manufacturing method according to one of the preceding claims.

Images