FR3140930A1 - closing window and lighting and/or signaling system for motor vehicles - Google Patents

Abstract

The invention relates to a closing glass (3) of a housing of a lighting and/or signaling system housing a light module and a device configured to emit and/or capture radiation through an insert ( 32) of the closing window (3). For this purpose, the closing glass (3) comprises a main body (31), made of plastic, and the insert (32), made of glass, which extends through an opening (33) made in the body main (31). This clever configuration then makes it possible to use an acoustic wave transducer mechanically coupled to the insert (32), to clean it and guarantee proper operation of the device. Figure to be published with the abstract: Fig. 2

Description

closing window and lighting and/or signaling system for motor vehicles

The technical context of the present invention is that of lighting and/or signaling devices associated with sensors and devices for cleaning an optical surface through which said sensors carry out their measurements. More particularly, the invention relates to a closing window, a lighting and/or signaling system comprising such a closing window, and a motor vehicle.

Generally speaking, the present invention relates to a protection unit using a wave transducer making it possible to clean bodies in contact with the optical surface, by means of ultrasonic waves. By “clean”, we understand here that the wave transducer is configured to remove the bodies which were present in contact with the optical surface so that, following the cleaning operation, the optical surface is free of said bodies.

The present invention finds applications in many fields. By way of non-limiting example, an objective sought by the present invention is to overcome the effects linked to the accumulation of bodies on an optical surface, such as in particular drops of rain, frost or snow.

In order to rid a surface of these bodies, when they are in the liquid state and present in the form of drops on the optical surface, it is known to rotate said drops in order to be able to evacuate them from the surface. A known disadvantage of this technique lies in the fact that it is not suitable for surfaces with an area greater than a few square centimeters.

We also know the use of an electric field to control the hydrophobicity of a surface, as described for example in KR 2018 0086173 A1. This technique, known by the acronym EWOD meaning "Electro Wetting On Devices" in English and translatable as "Electrowetting device on dielectric", consists of applying a potential difference between two electrodes, so as to electrically polarize the surface of which we wishes to make the drops of liquid disappear and with the aim of modifying its wetting properties. By controlling the location of the polarization, the drop can then be moved. A known disadvantage of this technique lies in the fact that it can only be implemented with particular materials and requires particularly precise positioning of the electrodes over the entire surface where we want to control the wetting properties, making it complex even expensive, its industrialization, its mass production and its integration into products intended for the automobile industry, for example.

In addition, we also know of course the use of a windshield wiper on the windshield of a motor vehicle. This proven technique, however, has the disadvantage of disrupting a field of vision accessible to the driver. In addition, successive passes of the windshield wiper spread the greasy particles deposited on the surface of the windshield. In addition, it is necessary to regularly renew the windshield wiper pads which wear out during use. Finally, this technique is not or difficult to use for cleaning sensors used on motor vehicles, such as for example lidars, proximity sensors or cameras.

For cleaning windshields or sensors used on motor vehicles, such as for example lidars, proximity sensors or cameras, we finally know cleaning processes making it possible to evacuate a liquid accumulating on an optical surface of the sensor via generation and propagation of ultrasonic waves in or on the optical surface. In particular, we know the document WO 2012/095643 A1 which describes a method for evacuating raindrops by ultrasonic vaporization. The amplitude and frequency of vibration are chosen so that raindrops falling on the windshield are vaporized as soon as they enter a vibration zone of the windshield surface. However, in order to obtain vaporization of a drop of liquid, a puddle or a film, the powers necessary to vibrate the vibratory zone are high, which limits their practical implementation, in particular for the development of autonomous devices. It is also well known that vaporization requires energies greater than those necessary to move drops on a support.

The techniques presented above all have drawbacks linked to their integration on more compact surfaces. In particular, in known lighting and/or signaling systems, the integration of a wave transducer at the level of a closing window is incompatible with the plastic materials generally used for such closing windows.

The object of the present invention is to propose a new protection unit in order to respond at least largely to the previous problems and to also lead to other advantages.

Another aim of the invention is to allow the integration of a wave transducer on a closing glass of a lighting and/or signaling system.

According to a first aspect of the invention, at least one of the aforementioned objectives is achieved with a closing window of a lighting and/or signaling system for a motor vehicle, the closing window comprising a main body formed of 'a first material, the main body at least partially delimiting a housing for a lighting system with which the closing glass is intended to collaborate, the main body comprising an opening closed by an insert fixed integrally to the main body and formed of a second material different from the first material.

In the context of the present invention, the closing glass thus forms a structure of complex shape which is intended to be located opposite a lighting and/or signaling system in order to protect it from bad weather.

In the context of the present invention, the main body forms a first part of the closing glass and is formed of the first material which is transparent to the light beam shaped by the lighting and/or signaling system. In other words, the light beam emitted by the lighting and/or signaling system propagates through the main body of the light ray closing glass, by diffusion and/or refraction and/or transmission so as to emerge mainly beyond said main body, relative to a light source of the lighting and/or signaling system.

In the context of the present invention, the opening formed in the main body is closed by the insert. Thus, the opening and the insert have compatible dimensions which allow such closing of the opening by the insert. Generally speaking, the insert has a surface area greater than that of the opening. Optionally, the insert has a shape and dimensions corresponding to a homothetic expansion of a shape of the opening. The opening is provided in the main body. The opening is through, that is to say that the opening passes right through the main body. The opening is preferably delimited by a closed contour.

In the context of the present invention, the insert takes the form of a plate or a part intended to fill the opening formed on the main body. The insert is formed of the second material which is preferably transparent with regard to the light beam shaped by the lighting and/or signaling system. In other words, the light beam emitted by the lighting and/or signaling system can propagate through the insert of the light ray closing glass, by diffusion and/or refraction and/or transmission of so as to emerge mainly beyond said main body, relative to a light source of the lighting and/or signaling system.

Thus, the closing glass conforming to the first aspect of the invention is not formed of a monolithic material, but, conversely, is formed of an assembly of several parts – the main body and the insert – attached thereto. 'one on top of the other. The choice of materials forming the main body and the insert thus allows better adaptability of the closing glass according to the invention, in particular with regard to a problem of cleaning and integration of a measuring device in a system of lighting and/or signaling, as will be discussed later.

The closing glass conforming to the first aspect of the invention advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements being able to be taken alone or in combination:

- the first material contains plastic. In particular, the first material comprises a plastic chosen from those of the polycarbonate type. This advantageous configuration thus makes it possible to reduce the manufacturing costs of such a closing glass while allowing great freedom of design, shapes and dimensions. In addition, the use of plastic makes the closing glass lighter;

- the second material includes glass. This advantageous configuration thus makes it possible to make the closing glass conform to the first aspect of the invention compatible with the subsequent use of a wave transducer placed in the lighting and/or signaling system intended to be equipped with said closing glass. Furthermore, given the production costs of glass and its weight, it is advantageous to reduce its use to the strict design of the insert;

- at the level of a peripheral contour of the insert, the insert is overmolded into the main body. This advantageous configuration makes it possible to establish a reliable and stable connection of the insert to the main body. Thus, the insert is placed against the main body at the level of a peripheral contour of the insert, so that, at the level of a central zone of the opening of the main body, the insert is stretched in through said opening. In addition, the overmolding of the insert in the main body makes it possible to securely fix the insert to the main body through a non-detachable connection that is simple to implement. The overmolding thus takes the form of a peripheral bead formed from the main body and which embeds the insert through the opening. Advantageously, the bead thus formed does not protrude over the insert at the level of the opening, so as not to obstruct it, even partially;

- the main body has a groove in which the insert is housed and securely fixed via a resin. The insert is thus housed in the groove which extends circumferentially to the opening. The insert rests in the groove and is held there by the resin. The use of such a resin is complementary or alternative to the bead formed by the main body on the insert. This advantageous configuration thus makes it possible to connect the insert and the main body in a more solid manner, making the fixing more robust, particularly with regard to future vibrations;

- the groove formed in the main body has a transverse profile open on the side of the housing delimited by the main body, so as to allow clipping of the insert in said groove. In the context of the invention, the groove extends around the opening along a closed contour. The transverse profile is taken in a plane perpendicular to the closed contour, at any point of the groove. In this plane, the groove thus has an L-shaped profile, an open branch of the “L” being located on the side of the opening. In other words, in a plane transverse to the groove, the groove is delimited by a bottom of the groove accommodating the insert and held by a rim located on a distal side of the housing, the groove remaining open on a proximal side audit housing. This configuration thus makes it easier to place the insert in the groove and through the opening.

According to a second aspect of the invention, a lighting and/or signaling system is proposed for a motor vehicle, the lighting and/or signaling system comprising:

- a closing glass conforming to the first aspect of the invention or according to any of its improvements;

- a light module housed in the housing formed by the main body of the closing glass, the light module comprising a light source configured to emit a plurality of light rays, projection optics configured to shape the light rays emitted by the light source in order to form a light beam extending through the closing glass;

- at least one device configured to capture and/or emit radiation through the protective glass insert;

- at least one wave transducer mechanically coupled to the insert and configured to generate a wave propagating through the insert.

Thus, the coupling of the at least one wave transducer to the insert makes it possible to effectively clean said insert by the propagation of waves on the surface of the insert.

In the context of the present invention, the at least one wave transducer is of the type of an electronic chip configured to be able to generate the waves in question. By way of non-limiting example, the at least one wave transducer is of the type of an electromechanical comb whose electrical polarization makes it possible to generate the waves, so that they propagate in or on the optical surface , in the direction of and/or in the region of optical interest.

The waves generated by the at least one wave transducer advantageously have a fundamental frequency between 0.1 MHz and 1000 MHz, preferably between 15 MHz and 30 MHz, for example equal to 20 MHz. Complementarily or alternatively, the waves generated by the at least one wave transducer advantageously have an amplitude of between 1 nanometer and 500 nanometers.

In the context of the present invention, the waves generated by the at least one wave transducer are of the type of an ultrasonic wave. More particularly, the waves thus generated are of the type:

– an ultrasonic surface wave, that is to say of the type of a Rayleigh wave, when the optical surface has a thickness greater than the wavelength of the ultrasonic surface wave. Such a surface wave propagates on the surface of the optical surface. A Rayleigh wave is preferred because a maximum proportion of the wave's energy is concentrated on the face of the optical surface on which it propagates, and can be transmitted to a body, for example a raindrop, resting on the optical surface. In this case, the surface wave propagates on the optical surface with which the at least one transducer is acoustically coupled, or even preferentially on which it is fixed;

– an ultrasonic core wave – or Lamb, when the optical surface has a thickness less than the wavelength of the ultrasonic core wave. Such a core wave propagates through the optical surface and makes it possible to “vibrate” the entire optical surface thus crossed by the core wave, that is to say the two optical faces located facing each other. on the other and forming the optical surface.

In the context of the present invention, the insert can be of any type and fulfill any function with respect to one or more devices intended to emit or capture radiation passing through the insert and placed opposite said insert, near the light module and in the housing delimited by the main body of the closing glass. By way of non-limiting example, the insert can be an optical lens for the device(s) through which the radiation passes or even a protective surface positioned opposite the device(s). Generally speaking, the insert is made of a material which allows the propagation of ultrasonic waves emitted by the wave transducer, whether surface or core. By way of non-limiting example, and according to a preferred embodiment of the invention, the insert is made of glass in order to promote the propagation of such waves. Additionally, the insert is made of a material that is transparent to the radiation emitted or captured by the device housed in the lighting and/or signaling system. In particular, the radiation emitted or captured by the device propagates in and through the insert by transmission and/or refraction and/or diffusion, so that a majority part of the radiation arriving from a first side of the The insert – on the closing glass housing side – comes out on the other side of the insert.

In the context of the present invention, the apparatus intended to be associated with the optical surface of the protection unit is configured to capture and/or emit radiation. To this end, it includes a sensor and/or a radiation emitter. The radiation is for example of the type of electromagnetic radiation, a spectrum of which has wavelengths which can be located in the visible and/or invisible spectrum. By way of non-limiting example, the device is preferably chosen from an optical remote sensing device, such as for example a lidar, a photographic device, a camera, a radar, an infrared sensor and an ultrasonic range finder. The device is housed in the housing delimited by the main body of the closing glass, behind the insert.

The lighting and/or signaling system in accordance with the second aspect of the invention advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements being able to be taken alone or in combination:

- the at least one wave transducer is fixed integrally to the insert and located outside the housing of the main body of the closing glass housing the light module. In this case, the waves generated by the at least one wave transducer are mainly, or even exclusively, surface waves;

- the at least one wave transducer is fixed integrally to the insert by any means, and in particular by gluing. Generally speaking, the at least one wave transducer is fixed integrally to the insert by any means making it possible to achieve acoustic coupling between said at least one wave transducer and the insert;

- the at least one wave transducer is electrically connected to an electrical device via at least one electric wire connected to the at least one wave transducer, the at least one electric wire extending towards the housing delimited by the main body through a light provided in the closing glass. The light takes the form of a conduit passing right through the closing glass so as to authorize an electrical connection between the at least one wave transducer and the electrical device. For this purpose, the at least one electric wire extends towards the housing delimited by the closing glass through the light.

- the electrical device to which the at least one wave transducer is intended to be electrically connected is for example of the type of an electrical energy source or of a control unit of the at least one transducer. Thus, in the context of the present invention, the at least one electrical wire connecting the at least one wave transducer to the electrical device is of the type of an electrical power supply wire used to polarize the at least one transducer waves and/or a control wire transmitting an electrical signal used to control operation of the at least one wave transducer. In the context of the present invention, the electrical device may or may not be housed in the housing formed by the closing glass. Optionally, the electrical device to which the at least one wave transducer is connected is accessible via an on-board network of the motor vehicle on which the lighting and/or signaling system is intended to be mounted;

– according to a first embodiment, the light is provided on the insert. According to a second alternative embodiment, the light is provided on the main body of the closing glass;

- advantageously, the at least one wave transducer is overmolded. In other words, the resin used to bind the insert in the groove of the closing glass extends beyond the groove so as to form a bead covering the at least one wave transducer. Thus, this advantageous configuration makes it possible to protect the at least one wave transducer by cleverly forming an overmolded protective cover. In addition, this advantageous configuration makes it possible to improve the tightness of the mounting of the at least one wave transducer on the insert and improves its robustness.

According to a third aspect of the invention, a motor vehicle is proposed comprising a lighting and/or signaling system conforming to the second aspect of the invention or according to any of its improvements.

Various embodiments of the invention are planned, integrating according to all of their possible combinations the different optional characteristics exposed here.

Other characteristics and advantages of the invention will appear further through the description which follows on the one hand, and several examples of embodiment given for informational and non-limiting purposes with reference to the appended schematic drawings on the other hand, in which :

illustrates a motor vehicle conforming to the third aspect of the invention;

illustrates a schematic view of a closing glass conforming to the first aspect of the invention;

illustrates a sectional view of a first embodiment of the closing glass conforming to the first aspect of the invention;

illustrates a detailed view of the closing glass illustrated on the ;

illustrates a sectional view of a second embodiment of the closing glass conforming to the first aspect of the invention;

illustrates a detailed view of the closing glass illustrated on the ;

illustrates a sectional view of a third embodiment of the closing glass conforming to the first aspect of the invention;

illustrates a detailed view of the closing glass illustrated on the ;

illustrates a sectional view of a fourth embodiment of the closing glass according to the first aspect of the invention;

illustrates a detailed view of the closing glass illustrated on the .

Of course, the characteristics, variants and different embodiments of the invention can be associated with each other, in various combinations, to the extent that they are not incompatible or exclusive of each other. In particular, it will be possible to imagine variants of the invention comprising only a selection of characteristics described subsequently in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from to the prior art.

In particular, all the variants and all the embodiments described can be combined with each other if nothing opposes this combination on a technical level.

In the figures, elements common to several figures retain the same reference.

There illustrates a motor vehicle 1 conforming to the third aspect of the invention, the motor vehicle 1 comprising, at its front face, lighting and/or signaling systems 2 which incorporate a closing window 3 according to the invention.

Such a closing glass 3 extends in front of a light module comprising a light source configured to emit a plurality of light rays and projection optics configured to shape the light rays emitted by the light source in order to form a light beam extending through the closing glass 3.

Thus, the closing glass 3 forms a protective optic for the light module and makes it possible to close a LOG housing in which the light module is mounted.

For this purpose, the closing glass 3 comprises a main body 31 formed of a first material, and an insert 32 formed of a second material different from the first material, the insert 32 closing an opening 33 of the main body 31 and being fixed integrally to the main body 31.

This advantageous configuration thus makes it possible to provide at the level of the main body 31 a window – formed by the insert 32 – through which a device can capture and/or emit radiation through the insert 32 of the protective glass.

The second material forming the insert 32 is compatible with the use of a wave transducer 4 – coupled acoustically, or preferably mechanically, to the insert 32 and configured to generate an acoustic wave propagating through the insert 32, the second material of the insert 32 allowing the propagation of waves on the surface and/or in the insert 32.

For this purpose, the insert 32 is preferably made of glass, while the first material forming the main body 31 is made of plastic.

The invention thus proposes a clever combination of several materials – the first material forming the main body 31 and the second material forming the insert 32 – in order to meet both the constraints and objectives of a light and robust closing glass 3 making it possible to protect the light module of the lighting and/or signaling system 2, but also compatibility with the use of a wave transducer 4 – incompatible with plastic – necessary for the proper functioning of a device housed in the light module and/or in the LOG housing delimited by the main body 31 of the closing glass 3.

Thus, in a clever manner, the invention makes it possible to integrate such a device into the LOG housing delimited by the main body 31 of the closing glass 3.

Several configurations are planned, some of which are illustrated in the FIGURES below. Generally speaking, the insert 32 is held in engagement in the main body 31 at the level of a peripheral contour 321 of the insert 32, the main body 31 having a particular geometry which allows the reception and securing of the insert 32 with it. The attachment of the insert 32 to the main body 31 can be permanent or temporary, that is to say non-detachable or detachable.

– in the exemplary embodiment illustrated in FIGURES 3 and 4, the main body 31 has a groove 313 in which the insert 32 is housed and held in engagement. The insert 32 is thus housed in the groove 313 which extends circumferentially to the opening 33 formed in the main body 31. In this exemplary embodiment, the main body 31 forms a peripheral bead 310 which forms the groove 313 and inside which the insert 32 is housed. The peripheral bead 310 forms an overmolding of the insert 32, taken at the level of its peripheral contour 321. The peripheral bead 310 thus delimits the groove 313 through an interior rim 312 located on the side of the device collaborating with the insert 32 and housed in the LOG housing delimited by the main body 31 of the closing glass 3, and through an outer rim 311 located opposite the inner rim 312 relative to the insert 32. Thus, the insert 32 is engaged and held in the groove 313 between the inner rim 312 and the outer rim 311. In this exemplary embodiment, the wave transducer 4 is mechanically coupled to the insert 32 at an outer face 322 of the insert 32. More particularly, the wave transducer 4 is placed against the exterior face 322 of the insert 32, for example glued to it. An electric wire 5 powering the wave transducer 4 extends through the main body 31 towards the LOG housing delimited by it;

– in the exemplary embodiment illustrated in FIGURES 5 and 6, the main body 31 has a groove 313 in which the insert 32 is housed and held in engagement. The insert 32 is thus housed in the groove 313 which extends circumferentially to the opening 33 provided in the main body 31. In addition, the insert 32 is held in the groove 313 via a resin 314. In this exemplary embodiment, the main body 31 forms a peripheral bead 310 which forms the groove 313 and inside which the insert 32 is housed. The peripheral bead 310 forms an overmolding of the insert 32, taken at the level of its peripheral contour 321. The resin 314 is housed in the peripheral bead 310 and in the groove 313, in order to allow better fixing of the insert 32 on the main body 31. The peripheral bead 310 thus delimits the groove 313 through an interior rim 312 located on the side of the device collaborating with the insert 32 and housed in the LOG housing delimited by the main body 31 of the glass closure 3, and through an outer rim 311 located opposite the inner rim 312 relative to the insert 32. Thus, the insert 32 is engaged and held in the groove 313 between the inner rim 312 and the outer rim 311. In this exemplary embodiment, the wave transducer 4 is mechanically coupled to the insert 32 at an exterior face 322 of the insert 32. More particularly, the wave transducer 4 is placed resting against the exterior face 322 of the insert 32, for example glued to it. An electric wire 5 powering the wave transducer 4 extends through the main body 31 towards the LOG housing delimited by it;

– in the exemplary embodiment illustrated in FIGURES 7 and 8, the main body 31 includes a groove 313 in which the insert 32 is housed and held in engagement. The insert 32 is thus housed in the groove 313 which extends circumferentially to the opening 33 provided in the main body 31. In addition, the insert 32 is held in the groove 313 via a resin 314. In this exemplary embodiment, the main body 31 forms a peripheral bead 310 which forms the groove 313 and inside which the insert 32 is housed. The peripheral bead 310 forms an overmolding of the insert 32, taken at the level of its peripheral contour 321. The resin 314 is housed in the peripheral bead 310 and in the groove 313, in order to allow better fixing of the insert 32 on the main body 31. The peripheral bead 310 thus delimits the groove 313 through an interior rim 312 located on the side of the device collaborating with the insert 32 and housed in the LOG housing delimited by the main body 31 of the glass closing 3. On the side of the LOG housing, the groove 313 remains open, as visible on the , in order to facilitate the assembly of the insert 32 and its possible subsequent disassembly. Thus, the insert 32 is engaged and held in the groove 313 thanks to the outer rim 311 and the resin 314 housed in the groove 313. In this exemplary embodiment, the wave transducer 4 is mechanically coupled to the insert 32 at an exterior face 322 of the insert 32. More particularly, the wave transducer 4 is placed against the exterior face 322 of the insert 32, for example glued to it. An electric wire 5 powering the wave transducer 4 extends through the main body 31 towards the LOG housing delimited by it;

– in the exemplary embodiment illustrated in FIGURES 9 and 10, the main body 31 includes a groove 313 in which the insert 32 is housed and held in engagement. The insert 32 is thus housed in the groove 313 which extends circumferentially to the opening 33 provided in the main body 31. In addition, the insert 32 is held in the groove 313 via a resin 314. In this exemplary embodiment, the main body 31 forms a peripheral bead 310 which forms the groove 313 and inside which the insert 32 is housed. The peripheral bead 310 forms an overmolding of the insert 32, taken at the level of its peripheral contour 321. The peripheral bead 310 thus delimits the groove 313 through an interior rim 312 located on the side of the device collaborating with the insert 32 and housed in the LOG housing delimited by the main body 31 of the closing glass 3. On the side of the LOG housing, the groove 313 remains open, as visible on the , in order to facilitate the assembly of the insert 32 and its possible subsequent disassembly. Additionally, the resin 314 is housed in the peripheral bead 310 and in the groove 313, in order to allow better fixing of the insert 32 on the main body 31, and the resin 314 extends at the level of the exterior face 322 of the insert 32. Thus, the insert 32 is engaged and held in the groove 313 thanks to the outer rim 311 and the resin 314 housed in the groove 313. In this exemplary embodiment, the wave transducer 4 is coupled mechanically to the insert 32 at the level of an exterior face 322 of the insert 32. More particularly, the wave transducer 4 is placed against the exterior face 322 of the insert 32, for example glued to it. The resin 314 extends outside the groove 313 and beyond the peripheral contour 321 of the insert 32 in order to overmold the transducer 4 on the exterior face 322 of the insert 32. In this case, the resin 314 is preferably transparent to friendly radiation and/or captured by the device collaborating with the insert 32. An electric wire 5 supplying the wave transducer 4 extends through the main body 31 towards the delimited LOG housing by him.

In summary, the invention relates to a closing glass 3 of a LOG housing of a lighting and/or signaling system 2 housing a light module and a device configured to emit and/or capture radiation through an insert 32 of the closing glass 3. For this purpose, the closing glass 3 comprises a main body 31, made of plastic, and the insert 32, made of glass, which extends through an opening 33 made in the main body 31. This clever configuration then makes it possible to use an acoustic wave transducer 4 mechanically coupled to the insert 32, to clean it and guarantee proper operation of the device.

Of course, the invention is not limited to the examples which have just been described and numerous adjustments can be made to these examples without departing from the scope of the invention. In particular, the different characteristics, shapes, variants and embodiments of the invention can be associated with each other in various combinations to the extent that they are not incompatible or exclusive of each other. In particular, all the variants and embodiments described above can be combined with each other.

Claims (10)

Closing window (3) of a lighting and/or signaling system (2) for a motor vehicle (1), the closing window (3) comprising a main body (31) formed of a first material, the main body (31) at least partially delimiting a housing (LOG) for a lighting system with which the closing glass (3) is intended to collaborate, the main body (31) comprising an opening (33) closed by an insert (32) integrally fixed to the main body (31) and formed of a second material different from the first material. Closing glass (3) according to the preceding claim, in which the first material comprises plastic. Closing glass (3) according to any one of the preceding claims, in which the second material comprises glass. Closing glass (3) according to any one of the preceding claims, in which, at a peripheral contour (321) of the insert (32), the insert (32) is overmolded in the main body (31). ). Closing glass (3) according to any one of the preceding claims, in which the main body (31) comprises a groove (313) in which the insert (32) is housed and fixed integrally by means of a resin (314). Closing glass (3) according to the preceding claim, in which the groove (313) formed in the main body (31) has a transverse profile open on the side of the housing (LOG) delimited by the main body (31), so as to allow clipping of the insert (32) in said groove (313). Lighting and/or signaling system (2) for a motor vehicle (1), the lighting and/or signaling system (2) comprising:
- a closing glass (3) according to any one of the preceding claims;
- a light module housed in the housing (LOG) formed by the main body (31) of the closing glass (3), the light module comprising a light source configured to emit a plurality of light rays, projection optics configured to shape the light rays emitted by the light source in order to form a light beam extending through the closing glass (3);
- at least one device configured to capture and/or emit radiation through the insert (32) of the protective glass;
- at least one wave transducer (4) mechanically coupled to the insert (32) and configured to generate a wave propagating through the insert (32). Lighting and/or signaling system (2) according to the preceding claim, in which the at least one wave transducer (4) is integrally fixed to the insert (32) and located outside the housing ( LOG) of the main body (31) of the closing glass (3) housing the light module. Lighting and/or signaling system (2) according to the preceding claim, in which the at least one wave transducer (4) is electrically connected to an electrical device via at least one electric wire ( 5) connected to the at least one wave transducer (4), the at least one electric wire (5) extending towards the housing (LOG) delimited by the main body (31) through a light provided in the closing glass (3). Motor vehicle (1) comprising at least one lighting and/or signaling system (2) according to any one of claims 7 to 9.