Light-emitting device configured to perform at least two luminous functions
Patent Information
- Application Number
- EP2023798243
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-10-30
- Filing Date
- 2023-10-30
- Publication Date
- 2025-09-03
Smart Images
Figure 1.1
Abstract
Description
[0001] DESCRIPTION
[0002] Title of the invention ■ Lighting device configured to perform a plurality of lighting functions.
[0003] The present invention relates to the field of lighting devices, in particular suitable for equipping a motor vehicle. The present invention relates more particularly to such lighting devices suitable for generating several lighting functions, and for example a lighting light function and a signaling light function.
[0004] Vehicles, and in particular motor vehicles, are commonly equipped with headlights to generate various lighting functions such as road lighting or signalling the vehicle to other road users, including daytime running light functions or direction indicator light functions.
[0005] In some applications, light rays emitted by a light source are directed within a microlens array (MLA) to shape a beam to perform a light function.
[0006] The matrix device comprises an array of input microlenses, an array of output microlenses and a mask interposed between these arrays. The matrix device is configured to form light circulation channels between one of the input microlenses and one of the output microlenses, the mask comprising mask portions respectively arranged in one of the light circulation channels. Each mask portion is provided with at least one opening capable of allowing light rays to pass from the input microlens to the output microlens. The openings in the mask are configured to give a shape to the rays transmitted by the array of input lenses and to allow the array of output lenses to project this shape onto the road.Furthermore, vehicles, and more particularly motor vehicles, have increasingly compact headlights in which a single light module is capable of generating several light functions, in particular a lighting function and a signaling function.
[0007] In this context, it is sought to emit light beams specific to each of the light functions generated by the module through the same lighting surface. In other words, in a search for a visual identity of the lighting of a vehicle, it is desired that an observer outside the vehicle sees the same illuminated surface whether it is a lighting function or a signaling function which is provided by the projector.
[0008] The prior art microlens matrix devices are not suitable for such requirements, since a single light source is arranged in front of the input microlens matrix. However, the inventors wish to be able to implement such a microlens matrix device since these devices make it possible to give the functional illuminating surface a great deal of freedom of shape, and therefore freedom of style for the projector equipped with the matrix device, by means of discretization by the unit area of the input and output microlenses.
[0009] In this context, the present invention proposes a light device comprising at least light emission means, a collimator and a microlens matrix device, the light emission means being configured to emit light rays towards the matrix device via the collimator, the matrix device comprising at least one input microlens matrix, one output microlens matrix, a mask, interposed between the two microlens matrices, and a main optical axis intersecting the two microlens matrices, the matrix device being configured to form light circulation channels respectively arranged along the main optical axis between at least one input microlens and one output microlens, the mask comprising mask portions respectively arranged in one of the circulation channels.According to the invention, the light emission means comprise a plurality of selectively addressable light sources, the collimator being common to the plurality of light sources and configured to conform the light rays emitted by a light source into a beam of substantially parallel rays directed towards the matrix device, with an angle of inclination of the beam of substantially parallel rays relative to the optical axis which is different depending on the activated light source.Furthermore, at least one light circulation channel is arranged along the main optical axis, being delimited at a longitudinal end by a single input microlens, configured to focus the beams of substantially parallel rays into a focusing zone on the mask portion arranged in the light circulation channel and the position of which on the mask portion differs according to said angle of inclination of the beam of substantially parallel rays, the single input microlens thus being configured to direct the rays onto different focusing zones as a function of said angle of inclination of the beam of substantially parallel rays, the mask portion arranged in said at least one light circulation channel comprising a plurality of openings respectively arranged on one of the focusing zones.
[0010] The light sources are said to be selectively addressable insofar as they can be activated independently of one another, by an electronic control device. For example, when one of the light sources is activated, the other or other light sources can be deactivated so that only one light source is capable of emitting light rays. Alternatively, to homogenize the lit appearance of the surface depending on the activation of the lights, it may be envisaged to leave lit a source associated with a specific function while another source is lit. In other words, in certain cases, at least some of the light sources, in particular all the light sources, can be lit simultaneously, which makes it possible to simultaneously generate the respectively associated light functions.When all sources are on at the same time, it is possible that some sources are on at varying levels of light intensity for example.
[0011] Advantageously, all the light sources are configured to illuminate substantially the same area of the input microlens array. In other words, the light spots generated by the light sources on the input microlens array have substantially identical contours, such that said light spots largely overlap. Possible differences may exist due to the difference between the positions of the different light sources. By "largely overlap" is meant that more than 75%, in particular more than 90% of the surface of each light spot is common with at least one light spot generated by another light source of the lighting device.
[0012] Advantageously, each light source is configured to illuminate the entire input microlens array.
[0013] Light sources can include light-emitting diodes.
[0014] Each input and output microlens has a domed surface, facing the outside of the array device, and the thickness of material that extends from the domed surface to the mask, the mask forming the boundary between the input microlens array and the output microlens array. Channels are defined as a strip of the material of the array device formed by an input microlens and an output microlens arranged opposite the input microlens if the principal optical axis is considered, and there is no structural element within the array device, such as a partition for example, to generate a physical delimitation between two neighboring channels.
[0015] The dimensions of the constant section of a light circulation channel are defined in particular by the corresponding dimensions of the input microlens. The mask comprises a plurality of mask portions respectively equipped with a plurality of openings, such that each of the light circulation channels comprises a mask portion with openings.
[0016] If the light circulating in a circulation channel encounters one of the openings formed in the mask portion present across this circulation channel, the light can be propagated towards the output microlens array, which allows the realization of a luminous function. If this light comes from a first light source, a first luminous function can be realized and if this light comes from a second light source, a second luminous function can be realized, or an additional portion of the first luminous function making it possible to generate by combining these two portions a specific luminous function. In both cases, the light participating in realizing the luminous function leaves a common illumination surface, formed by the output microlens array.
[0017] The light device comprises a main optical axis, the first and second light functions being emitted globally along this main axis. In other words, the light beams of the first and second light functions each extend in a volume containing said main optical axis.
[0018] Both the input microlens array and the output microlens array can be perpendicular to the main optical axis. In this case, the light circulation channels are respectively arranged along the main optical axis, i.e., parallel to this axis.
[0019] The input microlens array and the output microlens array may both be inclined relative to the main optical axis, i.e. the median virtual surfaces on which said microlens arrays respectively rest are inclined relative to a plane perpendicular to said axis. In a first configuration, each output microlens is laterally offset relative to the respective associated input microlens to define a light circulation channel, relative to the main optical axis. In this configuration, the light circulation channels are respectively inclined relative to the main optical axis.In another configuration, certain sets of input microlenses and output microlenses respectively associated to define a light circulation channel are respectively axially offset with respect to at least one of the adjacent sets, relative to the main optical axis. Thus, there are steps present on the external faces of the input microlens array and the output microlens array, these steps generating an overall inclination of these arrays. In this configuration, the light circulation channels are respectively arranged along the main optical axis, i.e., parallel to this axis. It should be noted that said median virtual surfaces may be flat or curved.
[0020] According to the invention, it is thus possible to achieve the projection of several distinct light beams onto the same lighting surface, namely the matrix of output microlenses, by passing through first openings of the mask the rays focused by the input microlenses when a first light function is desired and by passing through other openings of the mask the rays focused by the input microlenses when another light function is desired. It should be understood that when talking about passing the rays focused through an opening, certain rays may at the margin not follow the theoretical path of the light rays and for example be blocked by an opaque portion of the mask.
[0021] The matrix device according to the invention thus makes it possible to easily and precisely produce different lighting functions with the same lighting surface, the mask being produced by lithography to produce different types of openings specific to the production of this or that lighting function.
[0022] The collimator is configured to redirect the rays passing through it so as to form at the output a beam of rays parallel to each other and thus to direct these light rays homogeneously towards the microlenses of the input microlens array. After passing through the collimator, the light rays emitted by one or other of the selectively addressable light sources are thus directed homogeneously onto each of the input microlenses. The collimator is configured to direct the rays into a beam of parallel rays which arrives at the input microlenses with an angle of incidence which is specific to the activated light source and therefore to the lighting function which it is desired to implement with the lighting device.
[0023] In other words, the collimator is configured to direct light rays emitted by a first light source toward the matrix device into a first beam of parallel rays and to direct light rays emitted by another light source toward the matrix device into another beam of parallel rays, the other beam of parallel rays having an inclination relative to the optical axis that is different from the corresponding inclination of the first beam of parallel rays.
[0024] The input microlens array and the output microlens array are composed of microlenses with dimensions of the order of a millimeter, between 0.3 mm and 5 mm.
[0025] More particularly, according to an advantageous embodiment of the invention, the projection microlenses all have a size, in diameter, height and / or width, in front view, less than or equal to 10 mm. This makes it possible to limit the thickness of the microlenses, and thus to limit the mass of the part. Furthermore, according to an advantageous embodiment of the invention, the projection microlenses all have a size, in diameter, height and / or width, in front view, greater than or equal to 0.3 mm. This makes it possible to manufacture the optical device by an injection method that is simple to implement. According to an advantageous embodiment of the invention, the projection lenses all have a size, in diameter, height and / or width, in front view, of between 0.5 and 5 mm. This allows the projection lenses to be small enough not to be distinguished at the usual observation distance.According to an optional feature of the invention, the at least one light circulation channel is arranged along the main optical axis, being delimited at one longitudinal end by a single input microlens and at the other longitudinal end by a plurality of output microlenses.
[0026] According to an optional feature of the invention, the output microlenses arranged at a longitudinal end of a light circulation channel are adjacent. If appropriate, the adjacent output microlenses may extend in offset and parallel elongation planes, with a step which is formed from one output microlens to the other.
[0027] According to an optional feature of the invention, at least one dimension of an input microlens participating in delimiting a light circulation channel is a multiple of a corresponding dimension of the output microlenses participating in delimiting this light circulation channel. For example, when a light circulation channel extends between an input microlens and two output microlenses, a dimension of the input microlens, projected in the vertical and transverse elongation plane, is equal to the sum of the corresponding dimensions, projected in the same plane, of the two adjacent output microlenses.
[0028] According to an optional characteristic of the invention, the output microlenses of the same light circulation channel are configured to have object foci positioned differently on the mask portion present in this light circulation channel, an object focus of an output microlens being specifically associated with an opening of the mask portion.
[0029] According to an optional characteristic of the invention, within a light circulation channel, the number of openings different from each other within a mask portion is equal to the number of output microlenses present at a longitudinal end of this light circulation channel.
[0030] According to an optional characteristic of the invention, the number of openings different from each other within a mask portion is equal to the number of different light sources. According to an optional characteristic of the invention, the openings present within the same mask portion, in a light circulation channel, are of different shapes and / or dimensions from each other.
[0031] According to an optional characteristic of the invention, the pattern formed in a mask portion by the openings of different shapes and / or dimensions is identical for each mask portion. In other words, the different openings are arranged alternately on the mask in at least one main elongation direction.
[0032] According to an optional feature of the invention, the apertures comprise two types of apertures, with the first apertures and the second apertures being arranged alternately on the mask along at least one main elongation direction. The matrix device extends mainly in a plane depending on two main elongation directions, perpendicular to the main optical axis of the optical axis, and each microlens matrix, input or output, is formed of microlenses arranged in rows and columns along these two main elongation directions. An alternation of the apertures of the different types can be done along one of the elongation directions or along both directions.
[0033] According to an optional characteristic of the invention, the light device comprises a first light source, the activation of which participates in generating a first light function and a second light source, the activation of which participates in generating a second light function or an additional portion of the first light function, light rays emitted by the first light source being intended to be focused by the input microlens of a light circulation channel on a first focusing zone located on a first opening of the mask portion arranged in this light circulation channel, light rays emitted by the second light source being intended to be focused by this same input microlens on a second focusing zone located on a second opening of the same mask portion.It should be noted that by participating in generating, it is understood that the light device according to the invention can be the only device allowing the production of the desired lighting or signaling beam or that the light beam generated by this light device can be combined with other light beams generated by other light devices to form said beam, whether or not these other light devices comply with the invention.
[0034] More particularly, the collimator and the input microlenses are configured such that the light rays passing through the same input microlens are intended to pass through the same portion of mask within the light circulation channel downstream of this input microlens, essentially through a first opening when the rays are emitted by a first light source and essentially through a second opening when the light rays are emitted by a second light source.
[0035] According to an optional characteristic of the invention, each mask portion comprises first openings, respectively second openings, associated with a first focusing zone, respectively a second focusing zone, and characterized in that at least one of the first openings, respectively at least one of the second openings, has a shape and / or a dimension different from the other first openings, respectively from the other second openings.
[0036] In this way, it is understood that the invention also covers cases where the windows formed by the openings can differ from one portion of the mask to another for the performance of the same function, for example to have more precise control within the globally generated light beam. For example, windows of different widths allow good precision on the evolution of the photometric values on a horizontal section of the beam.
[0037] According to an optional feature of the invention, the first light source and the second light source are at a distance from each other, being distributed on either side of a defined plane, the first light source being closer to said defined plane than the second light source. The first source may, if necessary, be arranged partly on this defined plane. The defined plane considered is a plane substantially perpendicular to one and / or the other of the microlens matrices and it comprises the main optical axis of the light device. This defined plane may in particular be a median plane, if necessary a plane of symmetry, of the collimator.By distance from each other, it should be understood that the light sources are not in contact with each other and are sufficiently separated, for example with a space between them of the order of 0.5 to 2 times the size of the light source, so that the rays can have a different inclination at the exit of the collimator depending on whether they are emitted by one or the other of the light sources.
[0038] According to an optional feature of the invention, the object focus of one of the output microlenses specifically associated with a first opening is arranged substantially on a border delimiting said first opening. This is notably implemented for the circulation channels intended to be crossed by the light rays participating in forming a lighting function, and notably a dipped beam function for which it is desired to have a clear cutoff of the beam, the cutoff of the beam then being achieved by said border delimiting the opening on which the object focus mentioned is arranged.
[0039] According to an optional characteristic of the invention, the edge of said first opening on which the object focus of one of the output microlenses is arranged has a projection.
[0040] According to an optional feature of the invention, the object focus of an output microlens specifically associated with a second opening is arranged substantially in the center of said second opening. By substantially in the center, it should be understood that this object focus is arranged far from an edge delimiting the second opening, which includes for example a position in which the object focus is arranged at two-thirds of a distance between two opposite edges delimiting this second opening. This is notably implemented for circulation channels intended to be crossed by light rays participating in forming a signaling function.
[0041] According to an optional feature of the invention, the mask is formed by a glass slide comprising at least one opaque layer deposited on one face of the glass slide, the openings being formed by cutouts in this opaque layer. More particularly, the opaque layer is deposited on the face of the glass slide which is opposite the input microlens array.
[0042] According to an optional feature of the invention, the number of different types of aperture is equal to the number of different light sources. Furthermore, the number of output microlenses associated with the same input microlens and with an associated light circulation channel is equal to the number of different light sources. For example: if two light functions are provided, with two light sources facing a common collimator, two types of apertures are produced in the mask, with an opening of each of these types of apertures which is present in the same portion of mask, that is to say in the same light circulation channel arranged between an input microlens and two output microlenses.When a first light source is activated, the light rays are focused by each input microlens within their associated circulation channel onto first zones of the mask portion present in this channel, the first zone corresponding to a first opening, or opening of the first type, formed in the mask portion. When the second light source is activated, the light rays are focused by each input microlens within their associated circulation channel, onto second zones of the mask portion present in this channel, the second zone corresponding to a second opening, or opening of the second type. Within each mask portion, the second zones are offset relative to the first zones according to the direction of offset of the light sources relative to each other.It is notable that each of the areas onto which the light rays are likely to be directed after passing through an input microlens is located in an opening, or at the edge of an opening so that the light rays can propagate towards one of the output microlenses. There are thus no or few light rays blocked within the matrix device and no loss of light intensity, in particular for the implementation of a signaling function. With regard to the implementation of a dipped beam type lighting function, for which it is desired to give the beam a shape that is different from that of the light spot, a portion of the light rays is cut. In the latter case, it should be understood that few light rays, other than those intended to be cut by the cut-off shape defined by the edges delimiting the specific opening in the mask, are blocked here.
[0043] According to an optional characteristic of the invention, the output microlenses associated with a light circulation channel equipped with a mask portion with an opening of the first type have an optical axis whose relative position within the light circulation channel is distinct from the corresponding relative position of the optical axis of the output microlenses associated with a light circulation channel equipped with a mask portion with an opening of the second type.
[0044] Thus, providing an off-center exit microlens so that its center is aligned with the aperture or the edge of the aperture helps to appropriately deflect light rays.
[0045] According to an optional characteristic of the invention, the input microlenses and the output microlenses respectively have an external surface, in particular curved, facing the outside of the matrix device, and the matrix device is configured to have an output surface, formed by the plurality of external surfaces of the output microlenses, which is inclined relative to a longitudinal direction along which the main optical axis of the light device extends.
[0046] For this purpose, the entire matrix device, and the light circulation channels as well, can be inclined relative to this main optical axis, with the external surfaces of the output microlenses extending in a plane substantially parallel to the plane in which the external surfaces of the input microlenses extend. The microlenses, and in particular the output microlenses, are then configured to bend the light rays towards the main optical axis of the light device.
[0047] Alternatively, the input microlens array and the output microlens array remain in a vertical and transverse plane, perpendicular to a longitudinal direction L along which the main optical axis o of the light device i extends, with light circulation channels remaining in this orientation parallel to the optical axis, and the external surfaces of the input microlenses are axially offset from each other, so as to form transverse rows axially offset from each other and thus staircase steps which create the tilting effect when viewing the screen as a whole.
[0048] The invention also relates to a motor vehicle comprising at least one lighting device in accordance with what has just been described previously.
[0049] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description which follows on the one hand, and examples of embodiment given for informational and non-limiting purposes with reference to the appended schematic drawings on the other hand, in which:
[0050] [Fig.i] represents a light device according to the present invention, making light sources visible, a collimator common to these light sources and a matrix device, comprising in particular a matrix of input microlenses, a mask and a matrix of output microlenses;
[0051] [Fig.2] represents in perspective the components of the matrix device of figure i, with the mask arranged between the microlens matrices;
[0052] [Fig.3] represents a detailed view of a portion of the mask of the matrix device of figure 1, making visible two openings of distinct shapes and / or dimensions within this portion of mask; [Fig-4] represents a general view of the operation of the light device according to the invention ensuring a first light function, with the schematic representation of light rays propagating in the light device when a first light source is made active;
[0053] [Fig.5] represents a local view of the matrix device, centered on a light circulation channel between an input microlens and two adjacent output microlenses, when the light device provides the first light function as illustrated in Figure 4;
[0054] [Fig.6] represents a general view of the operation of the lighting device according to the invention ensuring a second lighting function, with the schematic representation of light rays propagating in the lighting device when a second light source is made active;
[0055] [Fig.7] represents a local view of the matrix device, centered on the light circulation channel illustrated in Figure 5, when the light device provides the second light function as illustrated in Figure 6.
[0056] It should first be noted that while the figures set out the invention in detail for its implementation, these figures can of course be used to better define the invention, where appropriate. It should also be noted that these figures only set out examples of embodiments of the invention.
[0057] The features, variants and different embodiments of the invention may be combined with each other in various combinations, provided that they are not incompatible or mutually exclusive. In particular, variants of the invention may be conceived comprising only a selection of features described below in isolation from the other features described, if this selection of features is sufficient to confer a technical advantage or to differentiate the invention from the state of the art.
[0058] In the figures, the elements common to several figures retain the same reference. In the description which follows, reference will be made to an orientation which is a function of the Longitudinal, Vertical and Transverse axes as defined by the trihedron L, V, T represented in figures 1 to 7, with the longitudinal axis L which corresponds to the general direction of propagation of the light rays and the vertical and transverse axes V, T which participate in defining a main elongation plane of the microlens matrix device forming part of the light device, perpendicular to the longitudinal axis L. More particularly, the vertical axis V and the transverse axis T correspond respectively to the height and the width of windows produced in a mask as will be described in more detail below, these windows having a width dimension greater than that of the height.The choice of names for these axes does not limit the orientation that the lighting device can take, particularly when it is installed in a motor vehicle.
[0059] Figure 1 schematically illustrates a light device 1 comprising a matrix device 2 of microlenses, a collimator 3 and light emission means 4.
[0060] The light emitting means 4 comprise a plurality of light sources which, in the embodiment shown, are two in number, including a first light source 41 and a second light source 42. As will be discussed later, the number of light sources may vary provided that the matrix device is configured accordingly. Each of the light sources is selectively addressable. Here, each of the first and second light sources 41, 42 is thus capable of being switched on and off independently of one another, for example by means of an electronic control device.
[0061] The light sources 41, 42 are arranged on either side of a defined plane comprising a main optical axis 10 of the light device. In the example illustrated, the first light source 41 and the second light source 42 are distributed on either side of this defined plane, the distance of each of the light sources from the defined plane being able to vary according to the light function Y1 that these light sources participate in achieving. As will be described below, the distance of the light sources from the defined plane is to be determined according to the angle from the main optical axis 10 that it is desired to give to the light rays leaving the collimator when one or other of the light sources is activated.Thus, the light sources are distant from each other, in the vertical direction as illustrated in figure i in particular, but also in the transverse direction depending on the number and arrangement of the light sources. By distant from each other, we understand that the light sources are not in contact with each other.
[0062] The collimator 3 and the light emission means 4 are positioned relative to each other so that the light rays emitted by each of the light sources 41, 42 pass through the collimator 3. This collimator 3 is configured to capture light rays emitted by each of the light sources, here the first light source 41 or the second light source 42, and to orient them substantially parallel to each other and to direct them towards the matrix device 2, and more specifically towards an array of input microlenses 21.
[0063] The collimator 3 is more particularly configured to form beams of rays that are parallel or substantially parallel to each other, these beams being suitable for activating each of the light sources. By “substantially parallel” it is understood that the rays may have an angular offset related to the size of the light source that generates them. In other words, the collimator 3, which has the shape of a lens, is configured to generate at the output, in the direction of the matrix device 2, a first beam of parallel rays visible in FIG. 4 when a first light source 41 is made active, the rays mainly having an angle of inclination relative to the optical axis of a first value, as will be explained below with reference to FIG. 4.And this collimator 3 is configured to generate at the output a beam of parallel rays, but completely different, that is to say with a different inclination, if the activated light source is changed. The collimator is then able to generate at the output, in the direction of the matrix device 2, another beam of parallel rays when another light source is made active, the rays all or almost all having an angle of inclination relative to the optical axis of another value, different from the first value, as will be explained below with reference to FIG. 6.
[0064] The microlens matrix device 2 comprises said input microlens matrix 21, an output microlens matrix 22 and a mask 23 interposed between the input microlens matrix 21 and the output microlens matrix 22. In the illustrated example, each microlens matrix 21, 22 and the mask 23 extend mainly along a vertical and transverse plane, perpendicular to a longitudinal direction L along which the main optical axis 10 of the light device 1 extends. Alternatively, the matrix device can take an inclined position relative to the main optical axis, in particular to adapt to a curve of the vehicle in which it is to be integrated. This inclined position can be taken by tilting the matrix device as a whole or by forming steps at the output surface of the matrix device formed by an external surface of the output microlens matrix.
[0065] The output surface of the matrix device, i.e. the external surface of the matrix of output microlenses 22, forms a lighting surface of the lighting device 1, i.e. a surface through which the light rays exit to generate a light beam outside the vehicle, which is common to each of the lighting functions capable of being performed by the lighting device.
[0066] Each microlens array, input or output, has an external surface, facing away from the mask, and an internal volume, formed by the thickness of material extending from the external surface to the mask, the mask forming the boundary between the input microlens array and the output microlens array.
[0067] The input microlens array 21 is formed from a plurality of input microlenses 20 juxtaposed next to each other, both in the vertical direction, as seen in Figure 1, and in the transverse direction, as seen in Figure 2. These input microlenses each have a curved surface whose juxtaposition, where appropriate with a longitudinal offset which generates a step from one curved surface to the other, forms the external surface of the input microlens array, and they each have a thickness of material extending between the curved surface and the mask to be able to propagate the light from one to the other.
[0068] It is notable in the figures schematically representing the matrix device that only the external surface of the input and output microlenses is represented, but it should be noted that each microlens is not just formed by the curved surface but includes the thickness of material which goes from this curved surface to the mask, or to the mask support when there is one.
[0069] Each input microlens 20 is configured within the matrix device 2 such that it has an image focus on the mask 23. The light rays coming from the collimator 3 and passing through an input microlens 20 converge towards a focal point present on the mask 23. In the example illustrated, the input microlenses 20 are identical to each other.
[0070] In projection in a plane perpendicular to the main optical axis 10, the input microlenses 20 all have a size, in diameter, height and / or width, in front view, less than or equal to 10 mm and greater than or equal to 0.3 mm. More particularly, input microlenses may be provided which all have a size, in diameter, height and / or width, in front view, of between 0.5 and 5 mm.
[0071] In accordance with the arrangement of the input microlens array 20, the output microlens array 22 is formed of a plurality of output microlenses 24 juxtaposed next to each other, both in the vertical direction, as visible in FIG. 1, and in the transverse direction as visible in FIG. 2. These output microlenses each have a curved surface whose juxtaposition, if necessary with a longitudinal offset which generates a step from one curved surface to the other, forms the external surface of the output microlens array, i.e. the output surface of the array device, and they each have a thickness of material extending between the mask and the curved surface to be able to propagate the light from one to the other.
[0072] It is notable in the figures schematically representing the matrix device that only the external surface of the input and output microlenses is represented, but it should be noted that each microlens is not just formed by the curved surface but includes the thickness of material which goes from this curved surface to the mask, or to the mask support when there is one.
[0073] Each output microlens 24 is configured within the matrix device 2 such that it has an object focus on the mask 23. The light rays propagating within the matrix device and passing through this object focus are reoriented by the corresponding output microlens 24 into a light beam to be projected towards the outside of the vehicle to participate in forming a lighting beam on the road scene or a signaling beam.
[0074] In projection in a plane perpendicular to the main optical axis 10, the output microlenses 24 have, in a vertical direction, a height and, in a transverse dimension, a width of between 0.3 and 10 mm. It is notable that the height value of an input microlens is a multiple of the height value of an output microlens and that the width of an input microlens is similar to that of an output microlens. In the example illustrated, the height value of an input microlens is more particularly twice the height value of an output microlens. Without departing from the context of the invention, in particular if the arrangement of the light sources is on either side of a plane defined in a transverse direction, the value of the width of an input microlens could be a multiple of the value of the width of an output microlens.It follows from the above that each input microlens 20 has at least one dimension along a direction which is greater than the corresponding dimension of the output microlenses 24. In the example illustrated, for example and without this being limiting of the invention, it is the height of an input microlens along the vertical axis V which is greater than the height of an output microlens along the same axis, the widths being equivalent.
[0075] The matrix device 2 according to the invention is configured to comprise within it light circulation channels 5, extending respectively, in a direction parallel to that of the main optical axis 10, between an input microlens 20 and several adjacent output microlenses 24. The number of adjacent output microlenses 24 participating in delimiting the same light circulation channel depends on the number of different light sources capable of being activated opposite the same collimator. In the example illustrated, where two light sources are provided, each light circulation channel 5 extends between an input microlens 20 and two adjacent output microlenses 24, among which a first input microlens 241 and a second output microlens 242 can be distinguished.It is understood that the dimension of the input microlens greater than that of the output microlenses has the effect of covering the entire light circulation channel with a single input microlens 20 while the latter opens onto two output microlenses 241, 242.
[0076] The light rays shaped by the collimator which are caused to pass through an input microlens 20 propagate essentially in the light circulation channel 5 associated with this input microlens 20 and they emerge from the matrix device 2 essentially through one of the output microlenses 24 associated with this light circulation channel, once they have been able to pass through the mask 23 arranged across the light circulation channel 5.
[0077] As will be described in more detail below, the output microlenses 24 may have a different configuration depending on the light circulation channel 5 in which they are arranged. In particular, certain output microlenses 24 may have, relative to the light circulation channel specific to them and to the light function that they must participate in generating, a symmetrical or asymmetrical configuration, or more particularly centered or off-centered, with an optical axis of the output microlens which is coincident with or offset relative to a median axis of the associated light circulation channel.
[0078] Each light circulation channel 5 comprises a portion of the mask 23 extending across the matrix device between the input microlens matrix 21 and the output microlens matrix 22, the mask 23 consisting of a plurality of mask portions 231 juxtaposed with each other and respectively arranged in a light circulation channel 5 of their own.
[0079] Each mask portion 231 associated with a light circulation channel comprises a plurality of openings 26, visible in FIGS. 2 and 3 in particular, through which the rays deflected by the input microlens 20 associated with this light circulation channel are able to pass to continue their propagation through the matrix device 2 in the direction of one of the output microlenses, the light rays passing through one of the openings being directed towards one of the output microlenses while the light rays passing through another of the openings are directed towards another of the output microlenses.
[0080] Each mask portion 231 thus comprises respectively an opaque part 233, which blocks the propagation of light rays when they encounter this opaque part, and a transparent part 234, formed by the openings 26 and allowing the propagation of light rays brought to encounter this transparent part.
[0081] For a given light circulation channel, each output microlens 24 is configured to have an object focus positioned in one of the openings 26 forming the transparent part 234 of the mask portion 231. More particularly, for a light circulation channel in which the output microlenses are arranged side by side in a first direction, here the vertical direction, the openings 26 formed in the same mask portion 231 are spaced apart from each other in this same first direction. Each output microlens 24 is then configured to have an object focus positioned in the opening formed opposite this output microlens. As will be described below, the object focus of the output microlenses 24 may be positioned in a central position of the opening 26 or in an off-center position, and in particular on an edge delimiting the opening 26.
[0082] In the previously mentioned context of input microlenses 20 focused on the mask, it is understood that if the light rays focused by the input microlens 20 of a light circulation channel 5 are directed onto a first opening 261 participating in forming the transparent part 234 of the mask portion 231 arranged across this light circulation channel, the light is directed towards a first output microlens 24 arranged opposite this first opening, whereas if the light rays focused by the input microlens 20 of this light circulation channel 5 are directed onto a second opening 262 participating in forming the transparent part 234 of the same mask portion 231, the light is directed towards a second output microlens 24 arranged opposite this second opening. This will be more particularly described below with reference to FIGS. 4 to 7.
[0083] The matrix device is made of a transparent material, with here the mask 23 which is formed by a glass slide surrounded by a plastic material, the glass slide comprising at least one opaque layer deposited on one face of the glass slide, the opaque layer being cut, for example by a laser cutting operation, to produce each of the openings 26 within each of the mask portions. The cut parts thus form the transparent part 234 of the mask portions 231 and the remainder forms the opaque part 233.
[0084] The position of the mask 23 within the matrix device 2, as illustrated in Figure 1 and repeated in Figures 4 and 6, is given here for information purposes. The mask 23 could, without departing from the context of the invention, be moved along the main optical axis 10 to move closer to the input microlens matrix 21 or the output microlens matrix 22, provided that the microlenses are configured to have a focus on the mask as previously mentioned.
[0085] Furthermore, the position of the mask takes into account the thickness, i.e. the dimension along the longitudinal axis L, of the input microlens array and that of the output microlens array, the thickness of the input microlenses being able to be at least twice that of the output microlenses since there are two output microlenses for each channel for one input microlens.
[0086] As mentioned, and as can be seen in Figures 2 and 3, a mask portion 231 comprises a plurality of openings 26, arranged at a distance from each other so that an opaque part 233 is interposed between them. The openings formed within the same mask portion are offset from each other in the same direction as are the output microlenses delimiting the light circulation channel in which said mask portion is arranged. Furthermore, the openings can be distinguished from each other by their shape and / or their dimensions.
[0087] In the illustrated example, a mask portion 231 comprises two openings arranged vertically at a distance from each other, with a first opening 261 and a second opening 262. The mask portion 231 has a vertical dimension Dv which is equal to half the vertical dimension of the light circulation channel, and therefore substantially equal to half the vertical dimension of the input microlens 20 delimiting a longitudinal end of this light circulation channel. Furthermore, the vertical dimension Dv is substantially equal to the vertical dimension of an output microlens 24 delimiting a longitudinal end of this light circulation channel. The mask portion 231 extends vertically between an upper vertical edge 28 and a lower vertical edge 30.
[0088] In the following, arbitrarily, the first opening 261 is arranged closer to the lower vertical edge 30 than to the upper vertical edge 28, the second opening 262 being for its part arranged closer to the upper vertical edge 28.
[0089] The first opening 261 is delimited between a first border extending at a first distance Di from the upper vertical edge 28 of this mask portion and a second border extending at a second distance D2 from this upper vertical edge 28, and the second opening 262 is delimited between a first border extending at a third distance D3 from the upper vertical edge 28 of this mask portion and a second border extending at a fourth distance D4 from this upper vertical edge 28. In order for the openings to be vertically offset from each other, the value of the first distance Di is greater than the value of the fourth distance D4.
[0090] The mask 23 is formed by a juxtaposition of mask portions 231, with a lower vertical edge 30 of a mask portion which is merged with an upper vertical edge 28 of a neighboring mask portion as regards the juxtaposition in the vertical direction and with lateral edges which merge as regards the transverse juxtaposition not shown here.
[0091] Other arrangements could be implemented without departing from the context of the invention, for example with a staggered distribution of the input microlenses, and a corresponding distribution of the mask portions, so that a mask portion and its plurality of openings are arranged in the light circulation channel defined downstream of an input microlens.
[0092] Furthermore, one of the first or second openings could have a vertical dimension equal to Dv, that is to say substantially equal to half the vertical dimension of the input microlens 20 delimiting a longitudinal end of this light circulation channel, or substantially equal to the vertical dimension of an output microlens 24 delimiting a longitudinal end of this light circulation channel. Said opening could further have a horizontal dimension substantially equal to the horizontal dimension of the input microlens 20 delimiting a longitudinal end of this light circulation channel, or substantially equal to the horizontal dimension of an output microlens 24 delimiting a longitudinal end of this light circulation channel.Thus, said opening would then be delimited horizontally and / or vertically by the opaque parts 233 of the mask portions 231 of the adjacent light circulation channels and / or the opaque parts 233 of the mask portions 231 linked to the other openings of the same light circulation channel.
[0093] As mentioned, it is notable that the number of openings 261, 262 formed in the same portion of mask is equal to the number of different light sources 41, 42 associated with the same collimator 3, and equal to the number of light functions capable of being emitted through the same output surface, namely the matrix of output microlenses 22 or the same optical surface of a projector at the output of the matrix device 2.
[0094] In the illustrated example, two types of openings 26 are present and two light functions are provided by the light device 1 of the invention with the first light source 41 which participates, when it is activated, in generating a first light function and with the second light source 42 which participates, when it is activated, in generating a second light function.
[0095] In the illustrated example, the first light function is a lighting function and more particularly here a non-blinding lighting for other road users, known as "dipped beam headlights". The second light function may be a position light function, for which the power of the light source is reduced, or a signaling function and more particularly here a signaling of the presence of the vehicle, known as "daytime running lights".
[0096] The choice of the light functions to be provided by the light device results in characteristics concerning the light sources 41, 42 and concerning the openings 26 formed in the mask portions 231.
[0097] The light source associated with the realization of this or that type of light function is thus chosen according to the light intensity that this ZI light function must or must not ensure in order to comply with automobile regulations. Furthermore, as mentioned previously, the position of a light source relative to a defined plane comprising the main optical axis may depend on the light function to be realized and in particular on the sharpness of the contours of the light beam to be ensured.
[0098] In particular, in the exemplary embodiment where the first light function is a “low beam” type lighting function and where the second light function is a signaling function, the first light source 41 allowing the first light function to be performed may be closer to the defined plane than the second light source 42 allowing the second light function to be performed.
[0099] The openings 26 have a different positioning on their common mask portion and they may have shapes and dimensions distinct from each other. In particular, in the exemplary embodiment where the first light function is a “low beam” type lighting function, and as can be seen in particular in FIG. 2, the first openings 261 are delimited by a cut-off edge 32 having a projection. This cut-off edge 32 aims to define in the light beam projected at the output of the matrix device a particular shape making it possible to avoid dazzling road users who are likely to cross the vehicle equipped with the light device. This cut-off edge 32 is the second border extending at a second distance D2 from the upper vertical edge 28 of the corresponding mask portion 231.
[0100] It should be noted that the openings 26 could be reversed, together with the arrangement of the light sources on either side of the defined plane, so that the second border of the first opening, i.e. the cut-off edge 32 having the projection, this time extends to the distance D4 and is therefore closer to the optical axis and the projected image of this cut-off edge is sharper.
[0101] In the illustrated example, the second openings 262 are delimited by straight edges. The light device i according to the invention is particular in that the light emission means 4 comprise a plurality of selectively addressable light sources 41, 42, in that the collimator common to these light sources reorients the emitted light rays into a beam of parallel rays which impacts each input microlens 20 with an angle of incidence specific to the activation of such or such light source and in that the openings 26 provided in the mask portion 231 arranged downstream of an input microlens 20 are arranged to be selectively on the path of the rays transmitted by the input microlens according to the activation of such or such light source at the origin.
[0102] More particularly, several selectively addressable light sources 41, 42 are configured to illuminate the same matrix of input microlenses 21 via a common collimator 3. Each light source is arranged at a theoretical position relative to the collimator and to a defined plane, and the rays emitted by each light source are shaped into a beam of parallel rays specific to the activation of such or such light source, so that the rays emitted by a first light source arrive at an input microlens with a first angle of incidence and the rays emitted by a second light source arrive at this same input microlens with a second angle of incidence.
[0103] It results from this arrangement that when a first light source 41 is active, the light rays arrive at the input microlenses with a first angle of incidence and the input microlenses 20 focus the light rays on a first zone Zi of the mask portion 231 which corresponds to them. In other words, an input microlens 20 associated with a light circulation channel 5 focuses the light rays emitted by the first light source 41 on a first zone Zi of the mask portion 231 arranged in this light circulation channel, and another input microlens associated with another light circulation channel focuses the light rays emitted by the first light source on a first zone of the mask portion arranged in this other light circulation channel.The first zone Zi is located on the mask portion with a first spacing Ei (visible in FIG. 5) relative to the upper vertical edge 28 of this mask portion. The openings are configured so that one of the openings, here the first opening 261, is arranged in this first zone Zi. More particularly here, the first opening 261 is formed in the mask portion so that the cut-off edge 32 of this first opening is arranged on this first zone Zi.
[0104] It is understood that in the case where the first openings are arranged in a staggered manner as mentioned with reference to FIG. 2, with columns of mask portions which comprise openings in an inverted arrangement, the corresponding input microlenses are configured to focus the light emitted by the first light source in a first alternative zone, corresponding to the position of a first opening.
[0105] In this context, when the first light source 41 is activated, the light rays successively pass through the collimator and each of the input microlenses to propagate in each of the light circulation channels and to pass through the mask at each of the first openings 261.
[0106] When the second light source 42 is activated instead of the first light source 41, due to the different position of these two light sources relative to the collimator 3 and the different angle of incidence with which the rays shaped by the collimator arrive at the input microlenses 20 of the matrix device 2, the input microlenses 20 focus the light rays on a second zone Z2 of the portion of mask which corresponds to them.In other words, an input microlens 20 associated with a light circulation channel 5 focuses the light rays emitted by the second light source 42 onto a second zone Z2 of the mask portion 231 arranged in this light circulation channel 5, and another input microlens associated with another light circulation channel focuses the light rays emitted by the second light source onto a second zone of the mask portion arranged in this other light circulation channel. The second zone Z2 is located on the mask portion with a second spacing E2 (visible in FIG. 7) relative to the upper vertical edge 28 of this mask portion. The openings are configured so that one of the openings, here the second opening 262, is arranged in this second zone Zi.More particularly here, the second opening 262 is formed in the mask portion so that the second zone Z2 is arranged in the center of this second opening.
[0107] Here again, it is understood that in the case where the second openings are arranged in a staggered manner as mentioned with reference to FIG. 2, with columns of mask portions which comprise openings in an inverted arrangement, the corresponding input microlenses are configured to focus the light emitted by the second light source in a second alternative zone, corresponding to the position of a second opening.
[0108] In this context, when the second light source 42 is activated, the light rays successively pass through the collimator and each of the input microlenses to propagate in each of the light circulation channels and to pass through the mask at each of the second openings 262.
[0109] According to the invention, it is thus possible to achieve the projection of two distinct light beams onto the same lighting surface, by passing through the first openings 261 of the mask 23 the rays focused by the input microlenses 20 when a first light function is desired and by passing through the second openings 262 of the mask 23 the rays focused by the input microlenses 20 when a second light function is desired.
[0110] We will illustrate what has just been mentioned by describing more precisely the propagation of light rays emitted by the first light source, with reference to figures 4 and 5, then in a second step the propagation of light rays emitted by the second light source, with reference to figures 6 and 7. Figures 4 and 5 illustrate the lighting device when it makes it possible to provide a first lighting function, here “dipped beam” type lighting.
[0111] The first light source 41 is made active by appropriate control of an electronic control device associated with the light device. The first light source 41 emits rays towards the collimator 3, and the latter collects these rays and directs them into a beam of rays parallel to each other towards the input microlens matrix of the matrix device 2.
[0112] The collimator 3 is configured such that, when the light rays come from the first light source 41, these light rays emerge from the collimator 3 with a main inclination of a first angle ai relative to the main optical axis 10, taking into account, as previously specified, a slight divergence of the rays due to the fact that the source is not point-shaped. This results in a first angle of incidence of the light rays arriving at each of the input microlenses. In this context, the light rays are deflected by each input microlens 20 to be focused on a first zone Zi of the portion of the mask 231 arranged across the light circulation channel 5 and visible in FIG. 5. This first zone Zi corresponds to the presence of a first opening 261, such that the rays focused on this first zone Zi are able to pass through the mask 23 towards the output microlens matrix.The output microlens arranged opposite the first opening 261 has an object focus located on this first zone Zi, so that the rays which propagate through the first opening in the direction of this output microlens 24, here the first output microlens 241, exit from the matrix device substantially parallel to the optical axis of the output microlens, parallel to the main optical axis 10 of the light device.
[0113] As can be seen in Figure 5 in particular, the first zone Zi is located on the mask portion with a first spacing El relative to the upper vertical edge 28 of this mask portion. The first zone Zi corresponds to the presence of a first opening 261 insofar as, considering the first distance Di and the second distance D2 associated with this first opening 261 and previously mentioned, the value of the first spacing El is between the value of the first distance Di and the value of the second distance D2 which define the dimension of the first openings. More particularly here, the value of the first spacing El is substantially equal to the value of the second distance, so that the first zone Zi, on which the light rays are focused when the first light source 41 is active, is located substantially on the second edge of the first opening which forms the cut-off edge 32 previously mentioned.
[0114] It follows from the above that the light rays emitted by the first light source 41 propagate within the matrix device 2 in each of the light circulation channels 5 to pass through the first openings 261 provided in each mask portion 231. The output microlenses arranged downstream of these first openings 261 are configured to deflect the light rays in the direction of the road on which the vehicle is traveling to form a non-dazzling lighting beam.
[0115] Figures 6 and 7 illustrate the lighting device when it provides a second lighting function, here a vehicle signaling function of the “daytime running lights” type.
[0116] The second light source 42 is made active by appropriate control of an electronic control device associated with the light device. The second light source 42 emits rays towards the collimator 3, and the latter collects these rays and directs them into a beam of rays parallel to each other towards the input microlens matrix of the matrix device 2.
[0117] The collimator 3 is configured such that, when the light rays come from the second light source 42, these light rays emerge from the collimator 3 with a main inclination of a second angle ot2 relative to the main optical axis 10, again taking into account, as specified, a slight divergence of the rays due to the fact that the source is not point-like. This results in a second angle of incidence of the light rays arriving at each of the input microlenses. In this context, the light rays are deflected by each input microlens 20 to be focused on a second zone Z2 of the portion of the mask 231 arranged across the light circulation channel 5 and visible in FIG. 7. This second zone Z2 corresponds to the presence of a second opening 262, such that the rays focused on this second zone Z2 are able to pass through the mask 23 towards the output microlens matrix.The output microlens arranged opposite the second opening 262 has an object focus located on this second zone Zi, so that the rays which propagate through the second opening in the direction of this output microlens 24, here the second output microlens 241, exit from the matrix device substantially parallel to the optical axis of the output microlens, parallel to the main optical axis 10 of the light device.
[0118] As can be seen in Figure 7 in particular, the second zone Z2 is located on the mask portion with a second spacing E2 relative to the upper vertical edge 28 of this mask portion. The second zone Z2 corresponds to the presence of a second opening 262 insofar as, considering the third distance D3 and the fourth distance D4 associated with this second opening 262 and previously mentioned, the value of the second spacing E2 is between the value of the third distance D3 and the value of the fourth distance D4 which define the dimension of the second openings.More particularly here, the value of the second spacing E2 is substantially a value equidistant from the values of the third and fourth distances, so that the second zone Z2, on which the light rays are focused when the second light source is active, is situated substantially at the center of the second opening 262, or at two-thirds as mentioned previously, that is to say at a distance from the edge so that the majority of the rays which must pass through the opening are not blocked at the margin.
[0119] It follows from the above that the light rays emitted by the second light source 42 propagate within the matrix device 2 in each of the light circulation channels 5 to pass through the second openings 262 provided in each mask portion 231. The output microlenses arranged downstream of these second openings 262 are configured to deflect the light rays into a signaling beam substantially parallel to the direction of the main optical axis 10.
[0120] It can be seen, in particular by comparing figures 4 and 6, that the output surface of the light device, here formed by the matrix of output microlenses but which could be an optical surface of a projector arranged downstream of the matrix device, is illuminated over a substantially identical extent whether the first light function, via the activation of the first light source 41, or the second light function, via the activation of the second light source 42, is implemented.
[0121] The invention as just described makes it possible to meet the aim it set for itself, namely to enable the same light module to produce at least two different light functions, by proposing the same lighting surface, namely a surface through which the light rays emerge which has the same extent regardless of the light function implemented.
[0122] It is understood that the configuration of the matrix device proposed as an example could be different, since it allows for the same illuminated surface to be provided regardless of the lighting function implemented. As a non-limiting example, it would be possible to provide, as mentioned, a different alternation of the openings according to the columns to arrange the openings of the same type in a staggered pattern, and it would be possible to provide a lighting device that performs two different signaling functions, for example with daytime running lights and direction indicator lights, or two different lighting functions, for example with dipped beam headlights and a high-intensity light function to contribute to the creation of a "high beam".
Claims
CLAIMS i. A light device (i) comprising at least light emission means (4), a collimator (3) and a microlens matrix device (2), the light emission means (4) being configured to emit light rays towards the matrix device (2) via the collimator (3), the matrix device (2) comprising at least one input microlens matrix (21), an output microlens matrix (22), a mask (23), interposed between the two microlens matrices, the matrix device (2) being configured to form light circulation channels (5) respectively arranged between at least one input microlens (20) and one output microlens (24), the mask (23) comprising mask portions (231) respectively arranged in one of the light circulation channels (5), the light device being characterized in that the light emission means (4) comprise a plurality of light sources (41,42) selectively addressable, the collimator (3) being common to the plurality of light sources (41, 42) and configured to shape the light rays emitted by a light source into a beam of substantially parallel rays directed towards the matrix device (2), with an angle of inclination of the beam of substantially parallel rays relative to the optical axis which is different depending on the activated light source, the device being further characterized in that at least one light circulation channel (5) is arranged along the main optical axis (10) being delimited at a longitudinal end by a single input microlens (20), configured to focus the beams of substantially parallel rays into a focusing zone on the mask portion (231) arranged in the light circulation channel and the position of which on the mask portion (231) differs according to said angle of inclination of the beam of substantially parallel rays,the single input microlens being thus configured to direct the rays onto different focusing zones (Zi, Z2) as a function of said angle of inclination of the beam of substantially parallel rays, the mask portion (231) arranged in said at least one circulation channel, of light comprising a plurality of openings (261, 262) respectively arranged on one of the focusing zones (Zi, Z2).
2. Luminous device (1) according to the preceding claim, characterized in that the at least one light circulation channel is arranged along the main optical axis (10) being delimited at one longitudinal end by a single input microlens (20) and at the other longitudinal end by a plurality of output microlenses (24).
3. Light device (1) according to the preceding claim, characterized in that the output microlenses (24) arranged at a longitudinal end of a light circulation channel are adjacent.
4. Light device according to any one of claims 2 or 3, characterized in that the output microlenses (24) of the same light circulation channel (5) are configured to have object foci positioned differently on the mask portion (231) present in this light circulation channel (5), an object focus of an output microlens being specifically associated with an opening (26) of the mask portion (231).
5. Luminous device (1) according to one of claims 2 to 4, characterized in that, within a light circulation channel (5), the number of openings (261, 262) different from each other within a mask portion (231) is equal to the number of output microlenses (234) present at a longitudinal end of this light circulation channel (5).
6. Lighting device according to one of the preceding claims, characterized in that the number of openings (261, 262) different from each other within a mask portion (231) is equal to the number of different light sources (41, 42).
7. Luminous device (1) according to one of the preceding claims, characterized in that the openings (261, 262) present within the same portion of mask (231), in a light circulation channel (5), are of different shapes and / or dimensions from each other.
8. Luminous device (i) according to the preceding claim, characterized in that the pattern formed in a portion of mask by the openings (261, 262) of different shapes and / or dimensions is identical for each portion of mask (231).
9. A light device (1) according to any one of the preceding claims, characterized in that it comprises a first light source (41) the activation of which participates in generating a first light function and a second light source (42) the activation of which participates in generating a second light function or an additional portion of the first light function, light rays emitted by the first light source (41) being intended to be focused by the input microlens (20) of a light circulation channel onto a first focusing zone located on a first opening (261) of the mask portion (231) arranged in this light circulation channel, light rays emitted by the second light source (42) being intended to be focused by this same input microlens (20) onto a second focusing zone located on a second opening (262) of the same mask portion (231).
10. Luminous device according to one of claims 1 to 7, or 9 when it does not depend on claim 8, characterized in that each mask portion (231) comprises first openings (261), respectively second openings (262), associated with a first focusing zone, respectively a second focusing zone, and characterized in that at least one of the first openings (261), respectively at least one of the second openings (262), has a shape and / or a dimension different from the other first openings (261), respectively from the other second openings (262).
11. Lighting device according to claim 9 or 10, characterized in that the first light source (41) and the second light source (42) are at a distance from each other, being distributed on either side of a defined plane, the first light source (41) being closer to said defined plane than the second light source (42).
12. Lighting device according to one of the preceding claims, in combination with claim 2, characterized in that the object focus of one of the output microlenses (24) specifically associated with a first opening (261) is arranged substantially on a border (32) delimiting said first opening.
13. Lighting device according to the preceding claim, characterized in that the edge (32) of said first opening (261), on which the object focus of one of the output microlenses (24) is arranged, has a projection.
14. Lighting device according to any one of claims 9 to 11, characterized in that the focus of an output microlens (24) specifically associated with a second opening (262) is arranged substantially in the center of said second opening (262).
15. Motor vehicle comprising at least one lighting device (1) according to any one of the preceding claims.