FR3046658A1 - PROGRESSIVE IGNITION LIGHTING MODULE FOR MOTOR VEHICLE - Google Patents

Abstract

A light module for a motor vehicle, the light module comprising: - a first light guide (14), - a second light guide (18) comprising a plurality of portions (32) of the second light guide. The light module (8) further comprises at least one displacement means (20), the displacement means (20) being associated with a portion (32) of the second light guide and being adapted to move said portion (32) between a first position in which said portion (32) of the second light guide (18) is in contact with the first light guide (14), and a second position in which said portion (32) is away from the first light guide (14). light (14). Luminous device comprising such a light module.

Description

The invention relates to light devices that include motor vehicles and light modules that include these devices.

In known manner, these light devices are subject to a number of regulations to which their operation must comply.

In particular, direction indicators, conventionally known as turn signals, are subject to regulations requiring that the ignition of the apparent surface of these lights is progressively made from one side to the other of the device. In other words, the ignition must be initiated on one side of the fire, for example on the inside of the vehicle, and must continue gradually towards the outside of the fire until the fire is fully ignited.

These regulations result in strong technical constraints on the design of these systems.

A natural solution to allow the lighting devices to comply with this ignition principle consists in providing, within the device, a plurality of spatially distributed light sources that can be sequentially switched on.

This solution is not without drawbacks. Indeed, the use of a multitude of light sources increases the cost of the device. In addition, the power consumption of the device is high, as well as the heat generated by the device during its operation. The invention aims to propose a light module for a motor vehicle light device which does not have these disadvantages.

In particular, the invention relates to a light module for a motor vehicle, the light module comprising: - a first light guide, - a second light guide comprising a plurality of portions of the second light guide.

The light module further comprises at least one displacement means, the displacement means being associated with a portion of the second light guide and being adapted to move said portion between a first position in which said portion of the second light guide is in contact. of the first light guide, and a second position in which said portion is away from the first light guide.

Advantageously, the second light guide comprises means for absorbing light, for example arranged at a rear face thereof.

Advantageously, the first light guide is made of a material capable of allowing the propagation of the light emitted by the first light source by total internal reflection.

According to one aspect of the invention, the or each displacement means is configured to move the associated portion of the second light guide in a displacement comprising a translation. The translation may for example be substantially perpendicular to a longitudinal axis of the first light guide. If necessary, the moving means is configured to move the portion of the second guide at a distance from the first guide greater than the wavelength of the light emitted by the light source.

According to one aspect of the invention, at least one moving means comprises a biasing device configured to move the associated portion of the second light guide between one position and the other of the first and second positions.

According to one aspect of the invention, the biasing device comprises a shape memory wire adapted to deform under the effect of heat.

Alternatively, the biasing device may be a piezoelectric actuator, such as a piezoelectric motor.

According to one aspect of the invention, at least one moving means comprises a return means configured to urge the associated portion of the second light guide against the biasing device.

The return means comprises for example a spring. The biasing means and the biasing device are for example arranged side-by-side. Alternatively, they are arranged one in the other.

According to one aspect of the invention, at least one biasing device is configured to move the associated portion to the second position.

According to one aspect of the invention, at least one biasing device is configured to move the associated portion to the first position.

According to one aspect of the invention, the second light guide is made from a material having an optical index close to the optical index of the first light guide.

The term "near optical indices" means that the materials are configured so as not to deviate or slightly deviate the path of a light ray passing from one material to another. If necessary, the optical indices may be identical.

According to one aspect of the invention, the second light guide has a length greater than or equal to the length of the first light guide, the second light guide being formed by said plurality of portions of the second light guide, the light module comprising for each portion of the second light guide, a displacement means associated with said portion and adapted to move said portion between a first position in which said portion of the second light guide is in contact with the first light guide, and a second position wherein said portion is away from the first light guide.

For example, the first light guide is fixedly mounted in the light module. Where appropriate, the displacement means are fixed at one of their ends to the second guide and the other of their ends to a common frame.

According to one aspect of the invention, the light module comprises at least two displacement means and a control device configured to control each moving means, the control device being configured to control two consecutive displacement means the passage of the portion corresponding second light guide between the one and the other positions among the first and second position so that the respective passages of the corresponding portions of the second light guide between the positions considered are offset in time.

Advantageously, the control device is configured to make the passage of all the portions between their first position and their second position in a given period of time, for example less than 200 ms.

According to one aspect of the invention, the second light guide is made totally or partly from an elastically deformable material.

For example, the second material is for example made from silicone.

According to one aspect of the invention, the second light guide comprises at least two consecutive portions which are disjoint from each other.

According to one aspect of the invention, the first light guide comprises decoupling means arranged on a rear face of the first light guide and configured to deflect the light traveling through the first light guide towards a front face of the light guide opposite to said rear face, and in that the second light guide is arranged opposite said rear face.

For example, the decoupling means comprise decoupling prisms formed in said rear face.

According to one aspect of the invention, at least a portion of the second light guide with which a moving means is associated comprises a surface facing the first light guide having a shape complementary to the shape of the portion of the rear face of the light guide. first light guide in contact with which said surface is intended to be in the first position.

According to one aspect of the invention, the light module comprises a light source arranged to emit light within the first light guide.

According to one aspect of the invention, the light module comprises a light source arranged to emit light within the second light guide.

In these embodiments, the light source comprises for example at least one light emitting element and an electrical connection substrate on which the light emitting element or elements are arranged.

For example, the light source comprises a first and a second semiconductor light emitting element adapted to generate respective different color lights, for example white for one and amber for the other.

For example, the first element is configured to emit amber light and is adapted to cooperate with the first light guide to perform a scrolling direction indicator function.

Alternatively, the first element is able to emit white light and is intended to cooperate with the first light guide to perform a light reception function or a diurnal light function.

In addition, advantageously, in the first position, the portion is pressed against the first guide so that the interface between the portion and the first guide is constituted by an air gap whose thickness does not exceed half of the wavelength of the light emitted by the light source. Thus, the first position is adapted for light to pass from the first light guide to the second light guide via said portion. Advantageously, the path of this light in the first guide is advantageously retained in the second guide.

In addition, in the second position, the portion of the second guide is at a distance from the first guide greater than the wavelength of the light emitted by the source. This has the effect that the source light does not pass between the two guides at the portion considered in the second position. The invention further relates to a light device comprising a light module as defined above.

The light device is for example configured to implement a daytime running function known by the acronym DRL (for Daytime Running Light).

In this configuration, the portions of the second guide are all in second position, that is to say away from the first guide. The invention will be better understood on reading the following detailed description, given solely by way of example and with reference to the appended figures, in which: FIG. 1 is a diagrammatic illustration of a luminous device and FIG. a light module according to the invention; - Figure 2 is a schematic top view of the light module of Figure 1; and - Figure 3 is a schematic top view of a light module according to a variant of the invention.

Figure 1 illustrates a light device 2 according to the invention, hereinafter device 2. The device 2 is intended to be integrated with a vehicle, such as for example a car. The device 2 is for example a projector - or headlight - vehicle, a signaling device such as a flasher, or a rear light vehicle.

Advantageously, the device 2 is a signaling device also configured to provide a daytime running function known by the English acronym DRL, for "Daytime Running Light", and which means daytime running light.

The device 2 comprises a housing 4, a closing window 6 and a light module 8 according to the invention, hereinafter module 8.

The housing 4 is provided with a front opening 10 and, rarerly, a receiving housing 12 in which the module 8 is received.

The closure glass 6 closes the front opening 10 of the casing 4. The closure glass 6 is translucent. Advantageously, the closure glass 6 is colorless. In some embodiments, the lens 6 is configured to diffuse the light emitted by the module 10.

The module 8 is configured to emit light during operation of the device 2. The light generated by the module 8 is emitted in the direction of the closure glass 6.

The module 8 comprises a first light guide 14, a light source 16 and a second light guide 18. The module 8 further comprises displacement means 20, a control device 22 and a support 24.

The first light guide 14 is configured to guide the light emitted by the light source 16 from a first side face 141 which it comprises with respect to which the light source 16 is arranged towards a second opposite lateral face 142 of the first light guide. 14.

The first light guide 14 is in the form of a solid piece made from a light conducting material. Advantageously, the first light guide is made of a material capable of allowing the propagation of the light emitted by the first light source by total internal reflection.

For example, the first light guide 14 is made from polymethyl methacrylate, known as PMMA, or from PC transparent polycarbonate.

The first light guide 14 has a generally cylindrical shape. For example, it has a section of generally circular or rectangular shape. In addition, it extends along an axis X substantially parallel to the closure glass 6.

The first light guide 14 has a front face 14A oriented towards the closing window 6, and a rear face 14B facing the receiving seat 12.

In order for the light coming from the light source 16 to be emitted in the direction of the closing glass 6, the first light guide 14 further comprises decoupling means 26 configured to deflect the light flowing along the first guide 14 towards the face before 14A.

In the example of the figures, the decoupling means 26 comprise decoupling prisms 28 formed in the rear face 14B and forming reliefs in this rear face 14B. These reliefs have for example a general serrated shape. The decoupling prisms 28 form projections relative to the rear face 14B. Alternatively, the decoupling prisms 28 are in the form of depressions in the rear face 14B, or streaks or cores.

As previously described, the light source 16 is configured to generate light and inject that light into the first light guide 14 through the first side face 14.

The light source 16 advantageously comprises at least one semiconductor photoemissive element adapted to generate photons by electroluminescence. Advantageously, this photoemissive element is a diode.

In some embodiments, the light source 16 comprises at least first and second semiconductor light emitting elements adapted to generate respective different color lights, for example white for one and amber for the other.

For example, the first element is configured to emit amber light and is adapted to cooperate with the first light guide to perform a scrolling direction indicator function.

Alternatively, the first element is able to emit light of white color and is intended to cooperate with the first light guide to perform a light reception function or DRL function of daytime running light.

In known manner, the light source 16 further comprises an electrical connection substrate (not shown) on which the light emitting elements are arranged, this substrate being configured to supply electrical energy to the light emitting elements.

The second light guide 18 is configured to selectively turn off and turn on the different areas of the apparent surface of the first light guide 14. In this sense, the second light guide 18 constitutes an extinction member of the first light guide 14.

The second light guide 18 has a generally cylindrical shape. It is arranged facing the rear face 14B of the first light guide 18. For example, it is arranged substantially parallel to the first light guide 14.

The second light guide 18 has a front face 18A arranged facing the rear face 14B of the first light guide 14. Advantageously, the front face 18A has a surface having a shape complementary to the surface of the rear face 14B of the first guide of light, that is to say a surface of complementary shape of those of the decoupling means 26 of the first light guide 14. In addition, the second light guide 18 has a rear face 18B.

On the other hand, the second light guide 18 has light absorbing means 30 configured to absorb the light from the light source 16 which reaches them. These absorption means 30 comprise an absorbent coating arranged at the rear face 18B.

In addition, the second light guide 18 has an optical index close to the optical index of the first light guide 14.

The term "near optical indices" means that the materials are configured so as not to deviate or slightly deviate the path of a light ray passing from one material to another. If necessary, the optical indices may be identical.

In addition, the second guide 18 is made totally or partially from an elastically deformable material. For example, the second guide 18 is made from silicone specifically designed to present an optical index close to that of the first light guide 14.

As illustrated in FIG. 2, the second light guide 18 has a plurality of portions 32 that are integral with each other and form this second guide 18. Due to the deformable nature of the second light guide 16, these portions are displaceable, some by compared to others. In particular, they are movable transversely to the direction X along which extends the first guide 14. Each portion 32 is associated with a displacement means 20.

Each moving means 20 is adapted to move the corresponding portion 32 between a first position in which the portion 32 is in contact with the first light guide 14 and a second position in which the portion 32 is away from the first light guide. 14.

As illustrated in FIG. 2, in which only one portion 32 is in the first position and the other portions 32 are in the second position, in the first position, the portion 32 is then in contact with the rear face 14B of the first light guide 14.

By "contact" is meant here that the distance separating the portion of the second guide of the first guide is less than the wavelength of the light emitted by the light source. Advantageously, this distance is less than or equal to half of this wavelength.

In other words, advantageously, in the first position, the portion 32 is pressed against the first guide 14 so that the interface between the portion 32 and the first guide 14 is constituted by an air gap whose thickness does not exceed not half the wavelength of the light emitted by the source.

This has the effect that the first position is adapted for light to pass from the first light guide to the second light guide via said portion.

In the second position, the portion of the second guide is at a distance from the first guide greater than the wavelength of the light emitted by the source 16. This has the effect that the light of the source 16 does not pass between the two guides at the level of the portion considered in the second position.

Advantageously, for the passage of a portion 32 between its two positions, the associated displacement means 20 is configured to move the portion 32 in a displacement comprising a translation of the portion 32.

For example, this translation is perpendicular to the direction in which the first guide 14 extends. In the exemplary embodiment of the Figures, this translation is thus perpendicular to the axis X of the first light guide 18. Translations other than perpendicular to this axis are also possible.

Each moving means 20 is arranged between the support 24 and the corresponding portion 32 of the second light guide 18.

Each moving means 20 comprises a return means 33 configured to return the corresponding portion 32 to a position among the first and second positions. In the example of FIG. 2, the return means 33 is configured to return the associated portion 32 to the first position, that is to say in contact with the first light guide 14. In addition, the return means 33 comprises a spring 34.

Each displacement means 20 further comprises a biasing device 36 selectively actuable and adapted to bias the portion 32 against the restoring force exerted by the return means 33, that is to say towards the second position . The biasing device 36 is configured so that the force exerted by the biasing device 36 during the actuation of the latter overcomes the restoring force exerted by the biasing means 33.

Advantageously, the biasing device 36 comprises a shape memory wire 38 arranged between the corresponding portion 32 and the support 24 and configured to deform under the effect of heat. At rest, the shape memory wire 38 has a first length h. Once stressed, it has a second length 12 less than the first length h.

Advantageously, the shape memory wires 38 are made from an alloy of titanium and nickel.

The biasing of the shape memory wire 38 is implemented by means of an electrical circuit (not shown) adapted to supply the wire 38 with electrical energy, this energy then being at least partially transformed by the wire 38 into heat by Joule effect.

The biasing device and the biasing means 33 are for example arranged side by side. Alternatively, they are arranged one in the other. Thus, for example, the shape memory wire 38 is for example arranged in a central cavity of the spring 34.

The control device 22 is configured to control the displacement means 20, in particular the biasing devices 36, for the selective displacement of each of the portions 32 between the first and second positions.

Advantageously, the control device 22 is further configured to switch the module 8 between a first configuration in which the portions 32 are all in the first position, and a second configuration in which the portions 32 are all in the second position.

In particular, the control device 22 is configured to pass the module 8 of the first configuration to the second configuration in a first sequence during which the displacement means 20 are consecutively controlled for the movement of the portions 32, and that of staggered manner in time along the second light guide 18. This shifted displacement for two consecutive displacement means 20 is implemented from one side face to the other, that is to say from the face 141 to the face 142 and / or vice versa. In other words, according to this sequence, the proximal portion 32 relative to a lateral face, for example the face 14i, is first moved from its first position to its second position. This same displacement is then performed for the adjacent portion 32, then for the neighbor of this neighbor, that is to say the third portion 32 starting from the face 14i, and so on until the displacement of all the portions 32 were operated.

The embodiment of this sequence by the control device 22 is advantageously triggered in response to a signal received at the input of the control device 22. This signal is for example sent to the control device 22 by a sensor designed to detect the actuation of a change of direction indication command by the vehicle driver.

Advantageously, the control device 22 is configured to make the passage of the module 8 between its first configuration and its second configuration in a given period of time, for example less than 200 ms.

In addition, the control device 22 is configured to pass the module 8 from its second configuration to its first configuration in a second sequence during which the control device 22 controls the moving means 20 the simultaneous movement of all the portions. 32 from their second position to their first position.

In the example of FIGS. 1 and 2, the control device 22 comprises an electrical circuit 40 adapted to supply electrical energy to the biasing devices 36 of the various displacement means 20, and a processing module 42 configured to control the electrical circuit. 40 for this purpose.

The processing module 42 comprises for example a microcontroller.

The support 24 forms a fixed base of the module 8. The first light guide 14 and the displacement means 20 are fixed to the support 24, which thus allows the relative movement of the portions 32 of the second light guide 18 with respect to the first guide of FIG. 14. The support 24 comprises for example a frame.

The operation of the device 2 will now be described with reference to the figures in a case in which the device 2 is a signaling device also adapted to put the daylight function known as the DRL.

During operation of the vehicle, the device 2 is active. In an initial configuration used when the vehicle is started, the device 2 implements the DRL function.

In this configuration, the light source 16 is then supplied with electrical energy and emits white light which penetrates inside the first light guide 18 by the lateral face 14i.

In addition, the portions 32 of the second light guide 18 are all in second position, the light is guided inside the first guide 14 and is reflected at the interfaces of the first guide, for example by total internal reflection. A part of this light reaches the decoupling means 26 and is then deflected by them towards the front face 14A and the closure glass 6. This deflected light then forms an output beam of the device 2, either directly, either via an output optic (not shown).

To maintain the portions 32 in the first position, the processing module 42 controls the electrical circuit 40 the electrical power supply of the biasing devices 36 of the various moving means 20. Under the effect of this power supply, and in particular the current flowing in the son 38, these son 38 generate heat by Joule effect and exceed their shape change temperature. They then have the length fi.

Upon actuation of the direction change indicator by the driver, the device changes from its DRL operating mode to its change direction indicator operating mode.

The light source 16 then ceases to emit white light and emits amber light. In addition, the control device 22 commands the displacement means 20 to move the portions 32 of the second light guide towards their first position according to the second sequence described above, that is to say, simultaneously for all the portions 32. .

To do this, the power supply of the biasing devices is interrupted, so that the son 38 cool quickly and pass under their shape change temperature. Under the effect of the bias exerted by the springs 34, the portions 32 are then brought into contact with the first light guide 14.

In this first position, because of the contact between the portions 32 and the rear face of the first light guide 14 and the proximity of the optical indices of the first and second light guide, the photons arriving at the rear face 14B of the first light guide 14 are not reflected but penetrate into the second light guide 18. They are then absorbed by the absorption means 30.

Thus, by this mechanism, the second light guide 18 prevents the exit of light from the device 2, so that the device 2 appears off.

Once the device 2 has passed in this first configuration, the control device 22 commands the moving means 20 to implement the second sequence, so as to gradually turn on the device 2.

The sequence is for example implemented so as to turn on the device 2 from its side corresponding to the inside of the vehicle, that is to say the side of the device facing the median plane of the vehicle to its opposite side.

For example, this side is at the side face 14i.

During the implementation of this sequence, the control device 22 controls the electric power supply of the shape memory wire 38 of the displacement means 20 closest to the lateral face 14i of the first light guide 14, which causes heating wire 38 and its passage from length fi to length fi. In doing so, the wire 38 passes over fieffort exerted by the corresponding spring 34 and passes the associated portion 32 to the second position. In this position, the light that reaches the decoupling means 26 of the first guide 14 at the area facing the portion 32 are then again reflected and are redirected to the closure glass 6.

The displacement means 20 are then thus controlled step by step by the control device 22 in a time-shifted manner, which causes the progressive ignition of the device 2 as seen from the outside.

Once the portions 32 have all moved to their second position and the device 2 is fully lit, the device 22 again controls the passage of the device 2 from its second configuration to the first configuration by implementing the first sequence, which results in simultaneous extinction of the entire device 2.

This passage is for example controlled after a time delay prescribed by the regulations.

Once the succession of the two sequences has been implemented, this succession is then repeated as long as the change of direction indicator is active and announces a change of direction of the vehicle. Again, the sequences are for example repeated following the observation of a time delay of a duration also prescribed by the regulations and during which the device 2 is apparently extinct.

Once the direction indicator is deactivated by the driver, the device 2 switches back to its operating mode DRL. For this purpose, the light source 16 ceases to emit amber light and emits white light. In addition, the control device 22 controls the passage of all the portions 32 to their second position away from the first light guide.

The module 8 and the device 2 according to the invention have many advantages.

Thus, the possibility of selectively moving portions of the second light guide is a simple and inexpensive way to obtain a signaling device obeying the regulations in force, while making this device suitable for the implementation of other features whose DRL functionality.

In addition, the fact that the displacement of the portions is based on a translation limits the movement of the elements of the module 8, and allows to limit its size. This is all the more marked for a translation perpendicular to the general direction of the first light guide.

In addition, the bill of travel means is simple, robust and inexpensive.

Several variants of the invention are conceivable, in which, besides the elements specifically described as differing from the embodiment described above, the other elements remain unchanged.

Thus, with reference to Figure 3, the portions 32 are disjoint from each other, as opposed to the embodiment of Figures 1 and 2 wherein the portions 32 are integral.

Thus, during their movements between their two positions, the portions 32 thus made independent of each other portions limit the deformations they apply to the adjacent portions 32, which tends to improve the morphology of the interface formed between the portions 32 the second light guide 18 and the rear face 14B of the first light guide.

In some embodiments, the second light guide 18 may comprise portions 32 disjoined over a portion of its length, and portions 32 made of material on another part of its length.

In another variant, all or part of the displacement means 20 comprises an actuator of a nature other than that of the shape memory wires 38. For a given displacement means 20, the corresponding actuator is used as a replacement for the wire. shape memory 38, or in conjunction therewith.

This actuator comprises for example a piezoelectric actuator configured to deform when it is supplied with electrical energy.

Furthermore, in some embodiments, the biasing means 33 of the displacement means 20 is configured to urge the corresponding portion 32 towards its second position, the associated biasing device 36 being configured to bias the portion 32 to the first position.

This makes it possible to limit the energy consumption of the device 2, in particular in the DRL operating mode of the device 2.

In addition, in certain embodiments, the second light guide 18 may comprise inactive portions 32 '(FIG. 3) to which no moving means is associated. The sequences described above are implemented in the same way, the consecutive displacement means 20 being controlled in a time-shifted manner or simultaneously according to the sequence.

On the other hand, in the embodiment of the Figures, the guides 14 and 18 have been described as being substantially rectilinear. In a variant, their arrangement is arbitrary. For example, the first light guide 14 is curved. The second light guide 18 is advantageously disposed substantially parallel to the first guide. The translation applied to the portions 32 by the corresponding displacement means 20 is then substantially perpendicular to the local axis of the portion of the first light guide located opposite the portion 32 considered.

Moreover, in a variant (not shown), the source 16 is alternately configured to inject light into the second guide 18, rather than into the first guide 14. As previously, this light injection is for example implemented at level of a side face of the second light guide 18.

Claims (15)

A light module for a motor vehicle, the light module comprising: a first light guide (14); a second light guide (18) comprising a plurality of portions (32) of the second light guide, characterized in that the light module (8) further comprises at least one displacement means (20), the displacement means (20) being associated with a portion (32) of the second light guide and being adapted to move said portion (32) between a first position in which said portion (32) of the second light guide (18) is in contact with the first light guide (14), and a second position in which said portion (32) is away from the first light guide (14). light (14). 2. Light module according to claim 1, characterized in that the or each displacement means (20) is configured to move the portion (32) associated with the second light guide (18) in a displacement comprising a translation. 3. Light module according to claim 1 or 2, characterized in that at least one moving means (20) comprises a biasing device (36) configured to move the portion (32) associated with the second light guide between a position and the other of the first and second positions. 4. Light module according to claim 3, characterized in that the biasing device (36) comprises a shape memory wire (38) adapted to deform under the effect of heat. 5. Light module according to claim 3 or 4, characterized in that at least one displacement means (20) comprises a biasing means (34) configured to bias the portion (32) associated with the second light guide (18). against the biasing device (36). 6. Module according to any one of claims 3 to 5, characterized in that at least one biasing device (36) is configured to move the portion (32) associated with the second position. 7. Module according to any one of claims 3 to 6, characterized in that at least one biasing device (36) is configured to move the portion (32) associated with the first position. 8. Light module according to any one of the preceding claims, characterized in that the second light guide (18) is made from a material having an optical index close to the optical index of the first light guide (14). ). Light module according to one of the preceding claims, characterized in that the second light guide (18) has a length greater than or equal to the length of the first light guide (14), the second light guide being formed by said plurality of portions (32) of the second light guide, the light module comprising, for each portion (32) of the second light guide, a displacement means (20) associated with said portion and adapted to move said portion between a first position in which said portion (32) of the second light guide (18) is in contact with the first light guide, and a second position in which said portion is away from the first light guide (14). 10. Light module according to any one of the preceding claims, characterized in that it comprises at least two displacement means (20) and a control device (22) configured to control each moving means (20), the device control unit (22) being configured to control two consecutive displacement means (20) for passage of the corresponding portion (32) of the second light guide (18) between one and the other of the positions of the first and the second second position so that the respective passages of the corresponding portions (32) of the second light guide (18) between the positions considered are offset in time. 11. Light module according to any one of the preceding claims, characterized in that the second light guide (18) is made totally or partly from an elastically deformable material. 12. Light module according to any one of the preceding claims, characterized in that the second light guide (18) comprises at least two portions (32) consecutive which are disjoined from one another. A light module as claimed in any one of the preceding claims, characterized in that the first light guide comprises decoupling means (26) arranged on a rear face (14B) of the first light guide (14) and configured to deviate the light traveling through the first light guide (14) to a front face (14A) of the light guide opposite to said rear face (14B), and in that the second light guide (18) is arranged facing said face rear (14B). 14. Light module according to the preceding claim, characterized in that at least a portion (32) of the second light guide (18) which is associated with a displacement means (20) comprises a surface facing the first light guide. (14) having a shape complementary to that of the portion of the rear face of the first light guide (14) in contact with which it is intended to be in the first position. 15. Luminous device for a motor vehicle, characterized in that it comprises a light module (8) according to any one of the preceding claims.