FR3107362A1 - Facade for a backlit display device and method of manufacturing such a facade - Google Patents

Abstract

Title: Facade for a backlit display device and method of manufacturing such a facade The invention relates to a facade (10) for a backlit display device (7) comprising a light collimating film (15) comprising a first face (15a) intended to be placed opposite at least one light source (17) and a second face (15b) located on the opposite side of the first face (15a) and intended to be seen by a user, at least one of the faces (15a, 15b) carrying an opaque layer (21) comprising openings (19), the facade (10) further comprising a protective plate (30) of overmolded transparent plastic material over the second face (15b) of the light collimation film (15). The invention also relates to a backlit display device (7) comprising such a facade (10). The invention also relates to a method of manufacturing such a facade (10). Figure for the abstract: Fig. 2

Description

Facade for a backlit display device and method of manufacturing such a facade

The field of the present invention relates to facades for display devices in the passenger compartments of motor vehicles. More particularly, the invention relates to a front panel for a backlit display device for an instrument panel. Such a display device comprises for example a multitude of lights, witnesses and/or indicators which inform the driver of the motor vehicle of a large number of driving parameters such as the speed of movement, the level of fuel, the external and/or internal temperature, or on engine performance.

Such facades are generally backlit by light sources included within the display device to enable the driver to consult this information in all circumstances, that is to say day and night, independently of the lighting conditions. inside the motor vehicle.

In older cars, the display devices are installed in a recessed part of the dashboard and surmounted by a cover to prevent a stray light reflection on the windshield.

However, according to the new styles in motor vehicle interiors, it is desired to install the display device above the dashboard in an aerial manner. However, in this case, the rays emitted by the display device can create parasitic reflections on the windscreen or in the driver's area of vision in general, which can blur his perception or distract him, or even potentially the put in danger.

It is possible to equip such display devices with a light collimation film, this film makes it possible more particularly to select only part of the rays coming from the light source to collimate the light and restrict the angle of diffusion of this one. A collimation film comes for example in the form of a very thin transparent film within which are arranged a multitude of opaque lamellae called “blinds”.

These louvers are configured to only let through the light rays that penetrate the collimation film with an angle of incidence within a limited angular range. In other words, the louvers in the collimation film make it possible to block part of the light projected by a light source onto the collimation film, which avoids the creation of parasitic reflection in the driver's field of vision.

However, this arrangement implies that the collimating film becomes an integral part of the display device. An object of the present invention is to be able to integrate a collimation film into a display device.

To this end, the subject of the invention is a front for a backlit display device comprising a light collimation film comprising a first face intended to be placed facing at least one light source and a second face located on the opposite side of the first face, the second face being intended to be seen by a user, at least one of the faces bears an opaque layer comprising openings and the face is characterized in that it further comprises a protection plate in transparent plastic material molded over the second face of the light collimating film.

The transparent plastic protection plate gives the collimation film the rigidity necessary to limit its deformation and increase its resistance to physical stress. It also makes it possible to preserve the optical properties of the collimation film, thus allowing it to select only part of the rays coming from the light source in order to control the angle of diffusion of the light. The fact of overmolding the transparent plastic protection plate over the second side of the light collimation film makes it possible to take advantage of the plastic injection process which increases the possibilities in terms of technical and aesthetic designs of the facade.

The invention may further comprise one or more of the following aspects taken alone or in combination:

– the protection plate has a thickness between 1.5mm and 3mm;

– the protective plate in transparent plastic material comprises polymethyl methacrylate or polycarbonate;

–the front panel comprises an external anti-scratch layer arranged on a front face of the protective plate, the front face being closest to a user;

–the front panel has an anti-reflective outer layer on the side of the front face of the protection plate;

–the facade has an external anti-glare layer on the side of the front face of the protection plate;

–the facade has partitioning walls on the first face of the collimation film;

–the partitioning walls are configured to delimit specific lighting zones on the first face of the collimation film;

–the partitioning walls are overmoulded on the first face of the collimation film;

–the first face of the collimation film bears at least one opaque layer of screen-printed ink;

–the second face of the collimation film bears a decorative coating comprising transparent patterns; And

–the transparent patterns are located opposite at least one color zone of the opaque layer of screen-printed ink associated with them.

The invention also relates to a backlit display device for a motor vehicle passenger compartment, the backlit display device comprising a front as described previously and at least one light source arranged opposite the first face of the collimation of the facade so as to backlight the openings of the opaque layer .

Such a backlit display device comprising such a facade presents an aesthetic solution that can easily be integrated into a dashboard of a motor vehicle.

The invention may further comprise one or more of the following aspects taken alone or in combination:

–the backlit display device comprises holding elements configured to ensure a mechanical connection with a fixing interface arranged between the front panel and the backlit display device;

–the holding elements are molded onto the first face of the collimation film.

The invention also relates to a method for manufacturing a front for a backlit display device, the method comprising a step in which the insert is placed in an injection mold, the insert comprising at least one layer formed by a light collimating film and a step in which the insert is overmolded with a transparent plastic material.

Such a process for manufacturing a front for a backlit display device makes it possible to ensure cohesive compatibility between the protective plate made of transparent plastic material and the light collimating film without deteriorating the optical properties of the latter at the during the manufacture of this facade. Such a manufacturing process also makes it possible to multiply the possibilities in terms of aesthetic design of the facade. It allows more particularly the shaping of fluid surfaces, i.e. to limit the presence of sharp angles or seams within the facade. This also makes it possible to facilitate the arrangement of the facade within the backlit display device.

The invention may further comprise the following aspect:

–the overmolding step includes an injection phase followed by a compression phase.

Other advantages and characteristics of the invention will appear more clearly on reading the following description given by way of illustrative and non-limiting example, and the appended drawings, among which:

FIG. 1 represents a schematic view of a motor vehicle interior comprising a dashboard within which a backlit display device is arranged;

FIG. 2 represents a schematic sectional view of the front of a backlit display device according to a first embodiment;

FIG. 3 represents a similar view illustrating a second embodiment of the front of the backlit display device;

FIG. 4 represents a similar view illustrating a third embodiment of the front of the backlit display device;

FIG. 5 represents a similar view illustrating a fourth embodiment of the facade of the backlit display device;

FIG. 6 is a flowchart representing the steps of a method for manufacturing a front of a backlit display device, and

FIG. 7 is a flowchart representing the steps of another method of manufacturing a facade of a backlit display device.

In these figures, identical elements bear the same reference numbers.

The following achievements are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference is to the same embodiment, or that the features apply only to a single embodiment. Simple features of different embodiments can also be combined or interchanged to provide other embodiments.

In the description, certain elements can be indexed, as first element or second element. In this case, it is a simple indexing to differentiate and name elements that are close but not identical. This indexing does not imply a priority of one element over another and it is easy to interchange such denominations without departing from the scope of the present description. Nor does this indexing imply an order in time.

Figure 1 shows a schematic representation of a motor vehicle interior with a dashboard 1. The dashboard 1 is arranged behind the steering wheel 3 so as to be arranged facing a user 5 who is generally the driver of the motor vehicle . The user or driver 5 can therefore consult the information on a backlit display device 7 visible behind the steering wheel 3. It can be seen more particularly in FIG. 1 that the dashboard 1 does not include any cover generating shade on the front of the backlit display device 7. This design is an aesthetic choice, however it can generate legibility problems and be the source of unwanted reflections on the windscreen 9 or in the driver's vision area 5 more generally.

The display device 7 comprises a front 10 on which various information is displayed such as the speed of movement, the fuel level, the external and/or internal temperature, or even on the performance of the engine. The facade 10 comprises for example one or more tachometers 11 and/or a screen with a display area 12 and/or one or more indicator lights 13 or even indicators.

In order to limit the risk of having parasitic reflections on the windshield 9 or in the driver's vision zone 5 more generally, the facade 10 comprises a light collimation film 15 (FIG. 2) comprising a first face 15a intended to be arranged facing at least one light source 17 and a second face 15b located on the opposite side of the first face 15a and intended to be seen by a user such as the driver 5 (not shown in the Figure 2).

With reference to FIG. 2 in which the light rays emitted by the light source 17 are represented by dotted arrows, these light rays impact the first face 15a of the collimation film 15 in a dispersed manner. Only rays that enter the collimation film 15 without hitting the louvers (not shown in Figure 2) pass through the entire collimation film 15. In other words, the rays coming from the second face 15b of the collimation film 15 which are directed towards a user are included in a limited scattering angle.

Furthermore, at least one of the faces 15a or 15b bears an opaque layer 21 comprising openings 19 in the form of patterns. The openings 19 are transparent or at least translucent, they are configured to let the light from the light source 17 pass through the opaque layer 21 so as to make the patterns visible. The patterns of the openings 19 of the opaque layer 21 are, for example, symbols, characters or pictograms representing alarm, warning and/or signaling indicators commonly used on the dashboards of motor vehicles.

According to one embodiment of the backlit display device 7 for a motor vehicle passenger compartment, the latter comprises at least one light source 17 disposed opposite the first face 15a of the film 15 for collimating the light of the facade 10 so as to backlight the openings 19 of the opaque layer 21. It may in particular comprise several distinct light sources 17 (FIG. 3).

According to one embodiment of the opaque layer 21 illustrated in Figure 2, the latter is in the form of a layer of screen-printed ink on the first face 15a of the film 15 of collimation. Thus the collimation film 15 serves not only as a collimator configured to select the transmitted light beam, but also as a support for the ink screen printing which in this case forms the opaque layer 21 and the openings 19. The ink of the opaque layer 21 is for example black while the ink at the openings 19 can be colored or white.

According to a particular embodiment of the facade 10 illustrated in Figure 3, the first face 15a and the second face 15b of the film 15 each carry an opaque layer 21 comprising openings 19. More specifically, the first face 15a of the film 15 of collimation carries at least one opaque layer 21 of screen-printed ink and the second face 15b of the collimation film 15 carries a decorative coating 23 comprising transparent patterns 24, such that the transparent patterns 24 are located opposite at least one colored zone 25 of the opaque layer 21 of screen-printed ink which is associated with them.

Thus the opaque layer 21 carried by the first face 15a of the collimation film 15 is very similar to that described in the previous embodiment, except that the openings 19 are not patterns, but zones 25 of transparent or translucent color. The colored zones 25 are for example covered by filters which take the form of strips of colored transparent plastic. The colored areas 25 can also be in the form of a layer of transparent or translucent colored ink screen-printed on the first face 15a of the collimation film 15.

It is in fact more suitable to place an opaque layer 21 of screen-printed ink on the first face 15a of the collimation film 15 in order to avoid the dispersion or diffusion of the collimated light at the exit from the second face 15b. However, there are screen printing inks whose chemical properties limit such diffusion . In this particular case, it is also possible to place the ink of the screen printing forming the opaque layer 21 on the second face 15b of the film 15 for collimation. This embodiment is not illustrated in the figures.

Such an ink has for example a transmission coefficient of between 30% and 60%, it is more particularly equal to 40%. Furthermore, such an ink may have a haze coefficient of less than 15%. The “haze coefficient” refers to the amount of stray light scattered into a transparent element due to imperfections in its surface or particles embedded in it. This coefficient can be defined as the percentage of transmitted light which, when passing through a transparent medium, deviates from the incident beam by forward scattering, in particular if the quantity of transmitted light deviates by more than 2.5° from the incident beam. Regarding the scattering angle of the light passing through such an ink, this can be linked to the light power measured according to the inclination of a device configured to perform such measurements. Thus the light power measured is for example reduced by half when the measuring device is inclined by 7.5° relative to the normal of the second face 15b of the collimation film 15.

In this same second embodiment, the decorative coating 23 carried by the second face 15b of the collimation film 15 is for example a screen printing which allows to have an opaque background of the same color as the display device 7 in which is arranged the facade 10. Thus, when the display device 7 is off, the transition between the display zone 12 of the facade 10 and the decorative coating 23 is fluid and plain, even invisible to the naked eye, which makes it possible to improve the perceived quality of a user vis-à-vis the display device 7. The fact of arranging the decorative coating 23 on the second face 15b of the film 15 collimator of the light within the facade 10 allows, among other things, an aesthetic improvement of the facade 10.

The decorative coating 23 comprises transparent patterns 24 which are for example symbols, pictograms or characters backlit by the light source 17. In the case where the decorative coating 23 is carried by the second face 15b of the collimation film 15 (Figure 3), the transparent patterns 24 of the decorative coating 23 may in particular appear sharper to the eyes of the user than the openings 19 described previously.

More particularly, the transparent patterns 24 appear sharper in the sense that the contrast is improved and where the shape of the transparent patterns 24 is for example more detailed than in the case of the openings 19 of the first embodiment. The user's vision is thus improved, the cognitive effort provided to recognize the transparent patterns 24 on the facade 10 is less important. This can also limit the appearance of a feeling of fatigue in the user in the case where it is also the driver 5.

Furthermore, by placing the screen printing on the first face 15a of the collimation film 15, this embodiment makes it possible to associate each transparent pattern 24 of the decorative coating 23 with a color zone 25 of the opaque layer 21. In other words, each transparent pattern 24 of the decorative coating 23 can be placed opposite a colored area 25 of the opaque layer 21 so as to have its own color.

In order to reinforce the individual independence of the patterns 24, the facade 10 may comprise partitioning walls 27 on the first face 15a of the collimation film 15, as illustrated in FIG. 3. These partitioning walls 27 are configured to delimit specific lighting zones on the first face 15a of the collimation film 15. The partitioning walls 27 are for example opaque conduits which reflect the light rays coming from the at least one light source 17 to prevent them from reaching the patterns 24 other than that or those of the color zone 25 which is associated with them. The partition walls 27 are for example made of plastic materials. It is thus possible to use a multitude of light sources 17 to independently backlight each pattern 24 without risking an overflow of light outside the specific lighting zones on the first face 15a of the collimation film 15 .

According to one embodiment of the facade 10, the partition walls 27 are molded onto the first face 15a of the film 15 of collimation. The overmolding makes it possible to multiply the design possibilities for the partitioning walls 27. The partitioning walls 27 can for example delimit more or less large or wide areas on the first face 15a of the collimation film 15 depending on the arrangement of the witnesses shown on the facade 10.

The facade 10 further comprises a protective plate 30 made of transparent plastic material. The transparency of the protection plate 30 makes it possible to preserve the optical quality of the collimated light coming from the collimation film 15 . The protection plate 30 has for example a thickness of between 1.5 mm and 3 mm. The thickness of the protection plate 30 is more particularly equal to 2.5 mm. The protection plate 30 does not necessarily have a uniform thickness. According to an embodiment not illustrated, the protection plate 30 has for example a slightly curved surface.

The transparent plastic protection plate 30 gives the collimation film 15 a rigid support ensuring its solidity within the facade 10. The rigidity of the protection plate 30 is in particular greater than that of the collimation film 15 . The plate 30 makes it possible to prevent a deformation of the film 15 of collimation, it also makes it possible to protect the film 15 of collimation against possible impacts or shocks which could damage it.

The protection plate 30 is rigid, however it can undergo slight elastic deformations when it is subjected to controlled external forces which are exerted for example on its front face 30a, such as stresses provided for in the specifications during the design of such a plate 30. Such a plate 30 is thus configured to regain its optical functionalities and its initial shape when the stresses exerted on its front face 30a cease. The front face 30a is closest to a user, so that the information visible on the backlit display device 7 is not altered.

The transparent plastic protection plate 30 is molded over the second face 15b of the collimation film 15 . The overmolding makes it possible to have cohesion between the second face 15b of the collimation film 15 and a rear face 30b of the protection plate 30. The protective plate 30 is thus permanently bonded to the collimating film 15 .

By using overmoulding, the collimation film 15 does not require forming, that is to say the collimation film 15 does not require any particular shaping step which would risk damaging its louvres. In other words, the louvers of the collimating film 15 are not affected during overmolding. This makes it possible more particularly to preserve the optical properties of the collimation film 15 .

The protective plate 30 made of transparent plastic material comprises, for example, polymethyl methacrylate or polycarbonate. Polycarbonate, better known by the acronym "PC", is a material commonly used in the field of optical glasses because of its high transparency, i.e. its ability to let light rays pass through without diffusing them. This makes it possible to clearly see what is behind such a polycarbonate plate.

Polycarbonate is more particularly resistant to chemical agents (except hydrocarbons). A polycarbonate protective plate 30 is thus easily cleanable in the event of soiling of its front face 30a in particular. Thus, even in the case of splashes on the front face 30a, such as splashes of rainwater, saliva, sweat or cleaning product, such a protective plate 30 does not keep traces after cleaning.

Polymethyl methacrylate, better known by the acronym "PMMA", is a transparent thermoplastic polymer material whose visible light transmission rate is very high (nearly 92%). Less expensive than polycarbonate, polymethyl methacrylate alone is relatively insensitive to scratches. A polymethyl methacrylate protection plate 30 therefore does not necessarily need an additional surface treatment to protect it from scratches.

According to another embodiment of the protective plate 30, its transparent material comprises resin. Such a protective plate 30 may be the subject of a surface treatment intended to harden the front face 30a of the protective plate 30 . This is for example covered with a hard coating of the "hard coat" type in English. Such a coating can for example take the form of a layer of varnish applied to its front face 30a or even that of a film overmoulded on the front face 30a. It serves to reinforce the protection conferred by the plate 30 or else to provide it with additional physical or optical properties.

Thus the facade 10 may comprise on the side of the front face 30a of the protective plate 30 an external scratch-resistant layer 32 to increase its lifespan, as illustrated for example in Figure 4. More specifically, the external layer 32 anti-scratch -scratch prevents in particular the formation of traces or permanent notches on the front face 30a of the protective plate which could interfere with the vision of the driver 5 when he consults the information displayed on the device 7 of backlit display.

Furthermore, the facade 10 may comprise, on the side of the front face 30a of the protection plate 30, an external anti-reflective layer 34 . Such an antireflection outer layer 34 has, for example, a very low reflection rate which can be combined with a very high transmission rate. Thus almost all of the light rays impacting the surface of the antireflection outer layer 34 pass through this antireflection outer layer while minimizing the reflected part of this incident light.

In addition, the facade 10 may comprise on the side of the front face 30a of the protection plate 30 an anti-glare layer 36. Such an anti-glare layer 36 ("anti-glare" in English) is configured to diffuse the light incident on the anti-glare layer 36 so that the formation of unwanted points of light on the facade 10 is avoided, because these unwanted points of light can potentially hide the information displayed on the backlit display device 7 .

According to one embodiment of the protection plate 30, the latter may comprise a single outer layer 32, 34 or 36 among those described previously or a multitude of layers 32 and/or 34 and/or 36 each conferring a specific property among those explained above (anti-scratch, anti-reflective or anti-glare). According to another embodiment of the protection plate 30, the same outer layer 32, 34 or 36 can impart a combination of the physical and/or optical properties explained previously.

According to one embodiment of the backlit display device 7, the latter comprises retaining elements 40 configured to ensure a mechanical connection with a fixing interface 41 arranged between the front panel 10 and the backlit display device 7, as illustrated in particular in Figure 5. These holding elements 40 are for example pliers, clips, magnets or complementary parts intended to interact with the fixing interface 41 which has for example an alignment system within a housing 42 provided for this purpose within the dashboard 1. The holding elements 40 are for example molded onto the first face 15a of the film 15 of collimation.

With reference to the flowchart of Figure 6, the method of manufacturing a facade 10 for a backlit display device 7 is detailed in the following description. The manufacturing process comprises at least two steps 100 and 200. Step 100 consists of placing an insert in an injection mold, the insert comprising at least one layer formed by a collimating film 15 . Step 200 consists of overmolding the insert with a transparent plastic material.

Overall, the method makes it possible to shape the front 10 from the insert placed in the injection mold. In other words, the insert designates the collimation film 15 as described previously in the various embodiments of the facade 10. Thus the insert is a preformed part in the sense that the opaque layers 21 possibly present on the first face 15a and/or on the second face 15b of the collimation film 15 are already deposited on these faces 15a, 15b before placing the insert in the injection mold.

With regard to step 200, the overmoulding of the insert with a transparent plastic material makes it possible to form the protective plate 30 over the second face 15b of the film 15 collimating the light. More specifically, step 200 of overmolding includes an injection phase 201 followed by a compression phase 202.

During the injection phase 201, a front of thick material intended to form the protection plate 30 is injected at the level of the second face 15b of the collimation film 15. During the compression phase 202, the two shells of the mold are brought together to close the mold. The front of material dispersed on the second face 15b of the collimation film 15 is then compressed in a homogeneous manner over the entirety of this second face 15b.

In the case where an outer layer 32, 34 and/or 36 is provided on the front face 30a of the protection plate 30, the material front is injected between the second face 15b of the film 15 and the outer layer 32, 34 and / or 36 which can also be an insert placed in the mold, like the film 15 of collimation.

During the compression phase 202, the insert or inserts are compacted evenly over the entire surface at the same time, which prevents a heterogeneous response of the louvers within the collimating film. The shutters are therefore not damaged during overmoulding. The two steps 100 and 200 of the manufacturing process thus make it possible to ensure cohesion between the rear face 30b of the protection plate 30 and the second face 15b of the collimation film 15 without damaging the optical properties of the film 15 during the manufacture of this facade.

Such a manufacturing process may include additional steps to make it possible to multiply the possibilities in terms of technical and aesthetic designs of the facade 10.

Thus the manufacturing process can for example comprise at least one step upstream of step 100. This at least one step consists for example in depositing an opaque layer 21 comprising openings 19 on the first face 15a of the film 15 of collimation. Alternatively, this at least one step comprises for example two phases: a first phase which consists for example in depositing a decorative coating 23 comprising transparent patterns 24 on the second face 15b of the collimation film 15 and a second phase which consists in depositing a opaque layer 21 of screen-printed ink with at least one color area 25 on the first face 15a of the film 15 for collimation.

The manufacturing process may also include at least one step 300 downstream of step 200, as illustrated in the flowchart of Figure 7. This at least one step consists for example in forming the partitioning walls 27 on the first face 15a of the collimation film 15 and/or form at least part of the holding elements 40 intended to cooperate with the fixing interface 41.

At least one additional step may designate the deposition of a scratch-resistant outer layer 32, an anti-reflective outer layer 34 and/or an anti-glare layer 36 on the front face 30a of the protection plate 30 if this step has not already taken place during the overmolding of the inserts during the injection phase 201.

Such a method can also allow the shaping of a front 10 with fluid contours, that is to say to limit the presence of sharp angles or seams on the protection plate 30 and on the front 10 more generally. Thus the protective plate 30 made of transparent material comprises rounded edges and/or a radiated surface.

Furthermore, at least one shell of the mold among the two shells intended to be used during such a manufacturing process may have a particular graining which may confer an aesthetic effect on the facade such as a matte appearance. This is more particularly the shell intended to give its shape to the protection plate 30 . This shell is placed opposite the second face 15b of the collimation film 15 which is overmolded like an insert during the manufacturing process of the facade 10.

Claims (14)

Facade (10) for a device (7) for the backlit display of a motor vehicle interior, the facade (10) comprising:
- a light collimation film (15) comprising a first face (15a) intended to be placed facing at least one light source (17) and a second face (15b) located on the opposite side of the first face (15a) and intended to be seen by a user (5), at least one of the faces (15a, 15b) bearing an opaque layer (21) comprising openings (19); the facade (10) being characterized in that it further comprises a protective plate (30) of transparent plastic material molded over the second face (15b) of the film (15) for collimating the light. Facade according to Claim 1, characterized in that the protection plate (30) has a thickness of between 1.5mm and 3mm. Facade according to any one of the preceding claims, characterized in that the transparent plastic protection plate (30) comprises polymethyl methacrylate or polycarbonate. Facade according to any one of the preceding claims, characterized in that it comprises an external anti-scratch layer (32) placed on a front face (30a) of the protective plate (30), the front face (30a) being closest to a user (5). Facade according to any one of the preceding claims, characterized in that it comprises on the side of the front face (30a) of the protective plate (30) an external anti-reflective layer (34). Facade according to any one of the preceding claims, characterized in that it comprises, on the side of the front face (30a) of the protection plate (30), an external anti-glare layer (36). Facade according to any one of the preceding claims, characterized in that it comprises partitioning walls (27) on the first face (15a) of the collimation film (15), the partitioning walls (27) being configured to delimit specific lighting zones on the first face (15a) of the collimation film (15). Facade according to the preceding claim, characterized in that the partitioning walls (27) are molded over the first face (15a) of the collimation film (15). Facade (10) according to any one of the preceding claims, characterized in that the first face (15a) of the collimating film (15) bears at least one opaque layer (21) of screen-printed ink and in that the second face (15b) of the collimation film (15) bears a decorative coating (23) comprising transparent patterns (24), such that the transparent patterns (24) are located opposite at least one color zone ( 25) of the opaque layer (21) of screen-printed ink associated with them. Backlit display device for a motor vehicle interior, the backlit display device, characterized in that it comprises:
–a faceplate (10) according to any preceding claim;
–at least one light source (17) arranged opposite the first face (15a) of the collimating film (15) of the front (10) so as to backlight the openings (19) of the layer opaque (21). Backlit display device according to the preceding claim, characterized in that it comprises holding elements (40) configured to ensure a mechanical connection with a fixing interface (41) placed between the front (10) and the device (7 ) backlit display. Method of manufacturing a front for a backlit display device according to any one of Claims 1 to 11, characterized in that the method comprises the following steps (100, 200):
–arranging at least one insert in an injection mould, the insert comprising at least one layer formed by a collimation film
–overmould the insert with a transparent plastic material. Manufacturing process according to the preceding claim, characterized in that the overmolding step (200) comprises an injection phase (201) followed by a compression phase (202). Method of manufacturing a front for a backlit display device according to claim 11 and any one of claims 12 to 13, characterized in that the method comprises the following steps (100, 200, 300):
–arranging at least one insert in an injection mould, the insert comprising at least one layer formed by a collimation film
–overmould the insert with a transparent plastic material to form the protection plate (30),
–overmoulding the insert with a plastic material to form the partitioning walls (27) and/or the holding elements (40) intended to cooperate with the fixing interface (41).