FR3041414A1 - OPTICAL MODULE FOR A MULTIFUNCTIONAL MOTOR VEHICLE PROJECTOR, COMPRISING A LIGHT GUIDE INCORPORATING REFLECTORS - Google Patents

Abstract

The subject of the invention is an optical module for a multifunction lighting and / or signaling projector for a motor vehicle. Two light sources (S1, S2) alternately emit longitudinally directed differentiated color light beams (L1) to a flat light guide (1). The light guide (1) is formed of a transparent body (5) out of which exit beams escape through an exit face (3) of the light guide (1). The light sources (S1, S2) are each composed of LEDs (6, 7) emitting elementary beams (F1, F2) and arranged on a support (8) laterally alternately from one light source (S1) to the other (S2). The light guide (1) incorporates a dividing means (9) of each of the elementary beams (F1, F2). The light beams escaping at the exit face (3) of the light guide (1) are each composed of a plurality of light beams, called dividing beams (FSd1, FSd2). The division beams (FSd1, FSd2) are derived from the individual division of the elementary beams (F1, F2) and are oriented by the dividing means (9) along respective projection axes parallel to the longitudinal direction (L1), in being distributed over the entire output face (3) of the light guide (1).

Description

OPTICAL MODULE FOR A MULTIFUNCTIONAL MOTOR VEHICLE PROJECTOR, COMPRISING A LIGHT GUIDE INCORPORATING REFLECTORS.

The present invention relates to the field of projectors for motor vehicles. The present invention relates more specifically to such projectors in which an optical module comprises various light sources operated alternately to generate light beams for respective lighting and / or signaling functions, such as in particular a daylight function and a function indication of direction.

Motor vehicles are equipped with various projectors generating light beams dedicated to specific lighting and / or signaling functions. Such projectors conventionally comprise a housing housing one or more optical modules generating light beams that are projected out of the housing through a transparent wall.

An optical module for an automobile headlamp generally comprises at least one light source and optical elements, such as reflectors and / or light guides, directing the light produced by the light source (s) towards the transparent wall through which are projected the light beams generated by the optical module. The light source (s) is (are) selectively activatable by control means according to the lighting and / or signaling needs of the vehicle.

It is common to use a set of light-emitting diodes (LEDs or LEDs) to form the light source (s). Light-emitting diodes have the particular advantages of being of a small footprint and of being energy efficient. Light-emitting diodes are conventionally implanted on a support, such as in particular consisting of a printed circuit board, integrating a circuit for supplying electrical energy and controlling the activation of the light-emitting diodes.

The various lighting and / or signaling functions of the vehicle are regulated. In the context of the present invention, it is more specifically, but not exclusively, to take into consideration the conventional direction indication function and the more recent daytime lighting function.

With regard to the direction indication function, a motor vehicle is equipped both at the rear and at the front with spotlights generating light beams, or lights, direction indicators. The direction indication function is to signal to other road users the intention of the driver to change the direction of progression of his vehicle. The implementation of a direction indicator lamp is operated by the driver operating a manual control device. The color of the light beams projected by the direction indicator lights is predefined according to the regulations, and the light source produces for this purpose a specific color light, notably amber or yellow color.

With regard to the daytime running light function, a motor vehicle is equipped at the front with daylight generating lights, also known under the name DRL by the acronym "Daytime Running Light". The daytime running light function is to signal the vehicle in conditions of luminosity assimilated to daylight. The activation of a daytime running light is operated by an automatic control means, so that the daytime running light is permanently illuminated when lighting lights commonly referred to as high beam or dipped beam equipping the vehicle are extinguished. In addition, the daytime running lights shall be extinguished when the direction indicator lamps are switched on so as to make the direction indicator lamps more visible. The color of the light beams projected by the daytime running lights is predefined in accordance with the regulations, and the light source produces for this purpose a specific color of light, white color in particular.

In this context, it seemed appropriate to integrate in a single projector the direction indication function and the daytime lighting function, the simultaneous implementation of which is prohibited. Indeed, such provisions improve the aesthetics of the vehicle by limiting the size of the front of the vehicle by a plurality of projectors assigned respectively specific lighting and / or signaling functions. For this purpose, it has been proposed to provide a motor vehicle headlight with an optical module comprising a plurality of light sources of respective colors and selectively activatable. The different light sources are respectively dedicated to the supply by the projector of the direction indication function and the daylight function. In this case, the lights alternately emitted by the light sources are directed towards the same output face of the optical module.

More particularly, the optical module is then in particular equipped with two light sources producing respective color lights by being alternately activatable, that is to say one or the other or none, by a control means. Each of the light sources is formed of a set of light-emitting diodes, which can be distributed on the same support. The light emitted by each of the light sources is conveyed by a same optical element capable of guiding the light, commonly referred to as a light guide, towards the same output face of the optical module. Such a light guide is typically formed of a given volume body made of transparent material. The light guide comprises an input face through which are admitted, within the light guide, respectively emitted lights alternately by one or the other of the light sources. A given light, emitted by an activated light source, is then directed through the light guide from its input face to an exit face of the light guide, through which exit face escapes the light out of the guide. from light. In this context, it is understood that the input face and the exit face of the light guide are respectively dedicated to the admission and the escapement of each of the lights respectively emitted and alternatively by the light sources.

A control means automatically activates at the ignition of the vehicle a first light source generating the light beams providing the daylight function. Activation, or ignition, of the first light source is maintained subject to a lack of illumination and / or signaling of the vehicle by the low beam and / or high beam. In the case where the driver controls the implementation of the direction indicator lights, the control means generates on the one hand an activation order of a second light source generating the light beams providing the direction indication function and on the other hand an order of inhibition, or extinction, of the first light source.

In this regard, reference can be made to EP2 161 494 (HELLA KGAA HUECK & CO), which describes an optical module for an automobile headlamp comprising two such light sources, each composed of a plurality of light-emitting diodes. The light sources are alternately activatable and emit respective color lights. Each of the lights alternately emitted by the light sources is conveyed through a same light guide between an entrance face of the light guide, through which light is admitted, and an exit face of the light guide, through which the light escapes out of the light guide.

There is therefore the problem of obtaining as homogeneous a diffusion as possible of the light escaping from the optical module. Indeed, the light emitting diodes respectively component light sources are distributed on the same support and the light emitting diodes constituting the same light source can not be side by side facing the entire surface of the input face of the guide, in order to leave room for the light-emitting diodes making up the other light source. When one or the other of the light sources is activated, the spacing of the corresponding diodes causes the light diffused at the output of the optical module to appear in the form of light spots distant from each other, which is unsightly and can affect the quality of the light beams generated by the optical module.

In this context, the object of the present invention is to offer an alternative to the structures of the existing optical modules to avoid presenting such an unsightly appearance resulting from the diffusion at the output of the optical guide of lights respectively emitted by various light sources. For this purpose, the subject of the present invention is an optical module for a motor vehicle headlamp combining at least two alternative lighting and / or signaling functions, such as in particular the alternative functions of daytime running light and direction indicator light. The optical module of the present invention is sought to provide, for each of these alternative functions, a light emission that tends to be at best homogeneous on an output surface of the optical module common to the projection of the light beams emanating from the lights respectively emitted by the light sources when activated.

The approach of the present invention consists in its generality to divide by total internal reflection within the light guide, the light beams respectively produced by the light sources and admitted to the input face of the light guide. Said light beams, called input beams, are divided, or even subdivided, inside the light guide into a plurality of light beams, called output beams, escaping through the exit face of the light guide. . From one or more internal reflections of said input beams made within the light guide, the number, and consequently the density, of the output beams are increased with respect to the number of input beams of which they are from. In addition, the output beams may advantageously be uniformly distributed by internal reflection over the entire output face of the light guide.

These arrangements are such that the light emitted at the output of the light guide and directed towards an output face of the optical module tends to be homogeneous, according to the number of generated output beams. Such a number of output beams can advantageously be adapted according to the needs, which are dependent on the configuration of the optical module, taking particular account of the number and the position with respect to the input face of light-emitting diodes in a plurality of different components respectively. light sources, as well as the surface of the output faces respectively of the optical guide and the optical module.

There is therefore the problem of making reflectors in the interior volume of the light guide. Indeed, such an embodiment should not tend to complicate the organization between them of the optical components of the optical module and must be obtainable at lower cost, without unduly complicating the structure of the light guide and without affecting its guiding qualities. the light between its entrance face and its exit face. Among various potential solutions, it is advantageously proposed to provide in the internal volume of the transparent body typically forming a light guide, at least one air prism whose surfaces arranged on the path of the light beams from an input beam. given respectively form said reflectors. Such an air prism may advantageously be formed in the mass of a transparent body forming the light guide during its molding, such as by placing inside the mold an insert arranged in the drawer core. Such an insert may be withdrawn from the transparent body slidably molded in a drawer-like manner by being extracted from one of the faces of the transparent body disposed out of the path traveled by the light within the light guide.

Depending on the number of output beams desired and consequently on the number of reflections of the input beams to be operated, several air prisms can be easily arranged as required during the molding of the transparent body inside the optical guide. . In addition, each of the air prisms may provide a plurality of reflectors dividing a given light beam into a plurality of light beams directed toward the exit face of the light guide. In addition, such plurality of air prisms can be distributed inside the optical guide, both successively following the path traveled by a given input beam, and by assigning one or more air prisms to each of the light beams respectively generated by a plurality of light-emitting diodes forming a given light source. From the total internal reflection of the light guide provided by the air prisms, the respective input beams at each of the light sources can be divided, or even subdivided, into a desired number of output beams emerging out of the exit face of the light guide.

In other words, the present invention proposes an optical module for a multifunction lighting and / or signaling projector of a motor vehicle, the optical module comprising at least two light sources emitting alternately, under control of a control means. , differentiated colored lights whose light beams, said input beams, are alternately admitted through the same input face of a light guide formed by a transparent body, in particular flat. The light emitted alternately by the light sources propagates through the light guide from said input face towards the same output face of the light guide in the form of light beams, called output beams, the input beams and the light beams. output beams being oriented in the same direction, said longitudinal direction, defined by the longitudinal dimension of the transparent body between its inlet face and its outlet face. Each of the light sources is composed of a plurality of elementary sources of light each emitting a light beam, said elementary beam, the elementary sources of light constituting any light source being arranged on a support at least alternately depending on the lateral dimension of the body transparent with the elementary sources of light composing another light source. According to the invention, the light guide includes a means for dividing each of the elementary beams respectively composing said input beams, said output beams being each composed of a plurality of light beams, called dividing beams, coming from the individual division of the elementary beams and oriented by the dividing means along respective projection axes parallel to the longitudinal direction being distributed over the entire exit face of the light guide.

According to a series of features of the invention, taken alone or in combination: the dividing means consists, for each of the elementary beams respectively constituting the light sources, of at least one set of cooperating reflectors incorporated into the mass of the body transparent and placed in the path of a light beam, said beam to divide, from a given elementary beam and oriented in the longitudinal direction; the cooperating reflectors of the same set of cooperating reflectors are formed by air prism faces comprising at least one set of two co-operating air prisms, called simple air prisms, formed in the mass of the transparent body. and arranged at a distance from each other at least according to the lateral dimension of the transparent body, the simple air prisms of the same set of two simple air prisms leaving between them a circulation space, towards the face output of the optical guide, light beams from the division of the beam to be divided; at least one main set of cooperating reflectors comprises at least one reflector, said main division reflector, placed partly on the path of a beam to be divided, the main division reflector firstly orienting a first fraction of the beam to be divided , said reflected beam, at least towards a main reflecting reflector directing the beam reflected in the longitudinal direction towards the exit face of the light guide and secondly allowing the flow towards the exit face of the light guide of a second fraction of the beam to be divided, said non-reflected beam; the main division reflector is formed by at least one face of a first single air prism and the main return reflector is formed by at least one face of a second single air prism arranged at least laterally at a distance of the first simple air prism, the first single air prism and the second single air prism arranged between the main division reflector and the main reflecting reflector a passage passage of the non-reflected beam towards the exit face of the light guide; said at least one divisional main reflector and said at least one main return reflector of a same main set of cooperating reflectors are oriented parallel to each other: said at least one main reflector of division and said at least one main reflecting reflector of the same main set of cooperating reflectors are each inclined with the same slope relative to the longitudinal direction and are arranged substantially in extension of one another in the longitudinal direction; the simple air prisms of the same set of cooperating air prisms form two main sets of cooperating reflectors respectively assigned to the division of beams to be divided from elementary beams emitted by laterally adjacent and participating elementary light sources. respective light sources; each of the single air prisms of the same set of cooperating air prisms cleans at least on one side, on one side, the main division reflector of a first main set of cooperating reflectors assigned to dividing a beam to be divided from a first elementary beam constituting an input beam emitted by a given light source, and secondly to another of its faces the main reflecting reflector of a second main set of cooperating reflectors assigned to the division of a beam to divide from a second elementary beam constituting an input beam emitted by the other light source; each of the simple air prisms of the same set of cooperating air prisms has in the general plane of extension of the transparent body a profile at least partly substantially shaped in a triangle, whose base is oriented in the direction longitudinal and whose two other sides form the faces of the single air prism respectively leaving respectively the main division reflector and the main return reflector assigned to the first main set of cooperating reflectors and the second main set of cooperating reflectors; a single air prism participating in at least one first set of cooperating air prisms and a single air prism participating in at least one second set of cooperating air prisms next to the first set of air prisms cooperating along the lateral dimension of the transparent body, are unified in the same air prism, then called double air prism; the double-air air prism not only the main division reflector of said first main set of cooperating reflectors and the main return reflector of said second main set of cooperating reflectors, but also on the one hand to one of its faces on main division reflector of a third main set of cooperating reflectors assigned to the division of a splitter beam from a third elementary beam constituting an input beam emitted by a second light source, and secondly to another of its faces the main reflecting reflector of a fourth main set of cooperating reflectors assigned to the division of a beam to divide from a fourth elementary beam constituting an input beam emitted by a first source bright; the double air prism presents in the general plane of extension of the transparent body a substantially diamond shaped profile composed of two said triangles arranged symmetrically on either side of a base common to the two said triangles; - Individually considering a main set of cooperating reflectors and for each of a plurality of main sets of cooperating reflectors provided by the same set of cooperating air prisms, said at least one set of cooperating reflectors further comprises at least one secondary game cooperating reflectors dividing the beam reflected by the dividing main reflector into a plurality of divided reflected beams; the secondary set of cooperating reflectors comprises at least one reflector, called secondary division reflector, placed partly on the path of said reflected beam, the secondary divisional reflector firstly orienting a first fraction of the reflected beam, said first divided reflected beam; to a secondary reflection reflector directing the first reflected beam divided along the longitudinal direction towards the exit face of the light guide, and secondly allowing the flow towards the main reflector of returning a second fraction of the reflected beam, said second reflected beam divided; the secondary reflection reflector of a first divided reflected beam resulting from the prior division of a beam to be divided by a given main set of cooperating reflectors is formed by the main reflecting reflector of another main set of cooperating reflectors ; - Individually considering a secondary set of cooperating reflectors and for each of the simple air prisms of the same set of cooperating air prisms, the secondary divisional reflector is formed by a set of cooperating reflecting surfaces formed by the prism of simple air of which at least one of the faces forms the main reflecting reflector of the reflected beam; the reflective surfaces composing the same secondary divisional reflector are formed by a protrusion of the mass of the transparent body oriented towards the inside of the simple air prism, leaving the co-operating reflecting surfaces; the projection has a polygonal profile in the general plane of extension of the transparent body; - Several sets of cooperating reflectors assigned to the division of the same elementary beam are arranged successively in said longitudinal direction; considering individually each of the elementary beams, a group of sets of cooperating downstream reflectors is assigned to the subdivision of beams to divide upstream from a prior division of a beam to be divided by at least one set of upstream cooperating reflectors, the concepts downstream and upstream being considered in the direction of propagation of the light through the optical guide between its input face and its output face; the sets of cooperating downstream reflectors of the same group of cooperating reflectors each comprise at least one said main set of cooperating reflectors arranged by cooperating simple air prisms; - The sets of cooperating reflectors downstream of the same group of cooperating reflectors are formed by said sets of respective simple air prisms of a group of sets of cooperating air prisms, arranged successively along the lateral dimension of the body transparent; the simple air prisms of one and the same group of sets of cooperating air prisms form between them two by two passage tunnels towards the exit face of the light guide respectively from an unreflected beam and from a reflected beam from the same beam to divide upstream; the same group of sets of cooperating air prisms comprises four simple air prisms, including two simple air prisms unified in a double air prism laterally interposed between two other simple air prisms, the four prisms simple air tubes providing at least two main sets of cooperating reflectors for each of splitter beams from elementary beams constituting the input beams respectively emitted by one and the other of the light sources; the sets of cooperating downstream reflectors of the same group of cooperating reflectors subdivide at least one non-reflected beam and a reflected beam into a plurality of light beams, called subdivided beams.

Thus, and according to a general approach of the present invention, the proposed optical module is an optical module for a multifunction lighting and / or signaling projector for a motor vehicle. Of course, the concept of multifunction is to be understood in the context of the present invention as a capability of the projector to emit alternately (that is to say, one or the other or none) several types of light beams providing respective lighting and / or signaling functions, such as in particular, but not exclusively, a daytime running light function and a direction indication function implemented under alternative conditions. The invention also relates to a method for obtaining a light guide fitted to an optical module as mentioned above, and wherein said at least one air prism is formed through the thickness of the transparent body by insertion into drawer of a form core inside a transparent body manufacturing mold;

The present invention will be described in connection with the figures of the attached plates. The general and particular characteristics of the present invention, as well as the details and advantages thereof, will emerge more clearly on reading the description given below as an indication, in relation to the various exemplary embodiments of the invention illustrated on FIG. FIGS. 1 and 3 are diagrams of the attached plates, in which: FIG. 1 is composed of three diagrams (a), (b) and (c), illustrating an optical module belonging to a prior art close to the present invention, as well as operating modes of the optical module shown; FIG. 2 is composed of two diagrams (d) and (e) illustrating an optical module according to the present invention, as well as the operating modes of the optical module represented; FIG. 3 is composed of three diagrams (f), (g) and (h) partially illustrating an optical module according to an exemplary embodiment of the present invention, as well as the operating modes of the optical module represented; FIG. 4 is a partial illustration of an optical module according to another embodiment of the present invention; FIG. 5 is composed of two diagrams (i) and (j), illustrating the operating modes of the optical module represented in FIG. 4; FIG. 6 is composed of three diagrams (k), (I) and (m), partially illustrating an optical module according to another exemplary embodiment of the present invention, as well as the operating modes of the optical module represented; and FIG. 7 is composed of three diagrams (n), (o) and (p) partially illustrating an optical module according to another exemplary embodiment of the present invention, as well as the operating modes of the optical module represented.

It should first be noted that the figures show the present invention in detail and in particular ways of its implementation, and that said figures can of course be used if necessary to better define the present invention, both in its particularities than in its generality. Moreover, in order to clarify and make easy the reading of the description that will be given of the present invention, the common organs represented in the various figures are respectively identified in the descriptions specific to these figures with the same numbers and / or letters of reference, without involving their individual representation in each of the figures and / or an identical arrangement of said common members between specific embodiments.

In the various figures, if necessary, it is specified in the form of an orthonormal reference system the geometric reference system making it possible to identify the different dimensions taken into account to define the present invention. Thus, it is to be considered that the light guides 1 shown in the various figures extend along a longitudinal dimension L1 identified between an entrance face 2 of the light guide 1 through which light is admitted and a face of output 3 of the light guide 1 through which escapes the light admitted inside the light guide 1. As a result, there is identified a lateral dimension L2 of the light guide 1 oriented perpendicularly to the longitudinal dimension L1. The longitudinal dimension L1 and the lateral dimension L2 of the light guide 1 jointly defining its general plane of extension extending perpendicular to its thickness, considered as the smallest transverse dimension T of a light guide 1 of general planar configuration .

It is first of all useful to refer to FIG. 1, which illustrates an optical module for a multifunction lighting and / or signaling projector for a motor vehicle, falling within a prior art close to the present invention.

The optical module shown in the various diagrams of FIG. 1 comprises at least two light sources S1 and S2. The light sources S1 and S2 alternately emit, under control of a control means 4, differentiated color lights whose light beams, called input beams FE1 and FE2, are alternately accepted through the same input face 2 a light guide 1 formed of a transparent body 5 generally flat. The light emitted alternately by the light sources S1 and S2 propagates through the light guide 1 from said input face 2 to the same output face 3 of the light guide 1 in the form of light beams, called output beams FS1 and FS2. The input beams FE1, FE2 and the output beams FS1, FS2 are oriented along the same direction, referred to as the longitudinal direction, defined by the longitudinal dimension L1 of the transparent body 5 between its input face 2 and its exit face 3 Each of the light sources S1, S2 is composed of a plurality of elementary light sources 6, 7, in particular each consisting of a light-emitting diode (LED) each emitting a light beam, said elementary beam F1, F2. The elementary sources of light 6.7 constituting any light source S1 or S2 are arranged on a support 8, alternately at least according to the lateral dimension L2 of the transparent body 5 with the elementary sources of light constituting another light source S2 or S1 .

In such a context and referring successively to diagrams (a) and (b) of Figure 1 which illustrate the optical module in the general plane of the light guide 1, the light sources S1, S2 are alternately generating beams of light. input FE1, FE2. The input beams FE1, FE2 are directed by the light guide 1 from its input face 2 towards its output face 3, when the light sources S1, S2 are activated by the control means 4.

In the diagram (c) of Figure 1, the light guide 1 is shown transversely along its edge at its outlet face 3, to illustrate the light effect visually obtained at a given distance from the exit face 3 of the light guide 1, and consequently at the output of the optical module and the projector. Such a visual effect is impacted because of the difference between two LEDs constituting the same light source S1 or S2. The light beams FS1 or FS2 escaping from the exit face 3 of the light guide 1 are spaced apart from one another by appearing as luminous points P separated from each other by a zone Z devoid of light.

In such a context and referring to the diagram (d) of FIG. 2, it is proposed by the present invention to integrate in the light guide 1 a dividing means 9 of each of the elementary beams F1, F2 respectively composing said beams FE1, FE2. The output beams FS1, FS2 are each composed of a plurality of light beams, called division beams FSd, originating from the individual division of the elementary beams F1, F2. In addition, the dividing means 9 orients the division beams FSd along respective projection axes parallel to the longitudinal direction L1, being distributed over the whole of the exit face 3 of the light guide 1.

In the diagram (e) of FIG. 2, the light guide 1 is represented according to its edge at its exit face 3, to illustrate the visually obtained light effect near the exit face 3 of the light guide 1 to given distance, and consequently at the output of the optical module and the projector. Referring successively to the diagram (c) of Figure 1 and to the diagram (e) of Figure 2 and considering a given viewing distance of the output face 3 of the light guide 1, it appears that the output light of the light guide 1 according to the present invention is more diffused over its entire output face 3 than the light output of the light guide 1 of the prior art. Such a result is obtained by the division by internal reflection in the light guide 1 of the elementary beams F1, F2 constituting a given input beam FE1, FE2, multiplying the light beams escaping from the light guide 1.

For a given number of LEDs constituting a given light source S1, S2, such a multiplication makes it possible to reduce the difference between the light spots P appearing at the exit face 3 of the light guide 1, and consequently tends to reduce the gap between the light spots appearing at the output of the optical module and the projector.

In the exemplary embodiment of an optical module of the present invention illustrated in diagrams (f), (g) and (h) of FIG. 3, the division means 9 is constituted, for each of the elementary beams F1, F2 respectively component light sources S1, S2, at least one set of cooperating reflectors 10a, 10b or 11a, 11b for example. The cooperating reflectors 10a, 10b or 11a, 11b are incorporated in the mass of the transparent body 5 while being placed in the path of a light beam, called the dividing beam FD, originating from a given elementary beam F1, F2 and oriented along the longitudinal direction L2. To clarify if necessary the concept of "output", it is already indicated that a light beam is considered as "issued" since it is constituting all or part of another light beam. By way of example and according to the embodiment illustrated in the diagrams (g) and (h) of FIG. 3, the beam to be divided FD by a said set of cooperating reflectors 10a, 10b or 11a, 11b originates from of a given elementary beam F1 or F2. The division beams FSd1 or FSd2 from the division of said elementary beam F1 or F2 given and directed towards the exit face 3 of the light guide 1 are two in number.

According to an advantageous embodiment, the cooperating reflectors of a single set of cooperating reflectors 10a, 10b or 11a, 11b are formed by air prism faces 12, 13. More particularly, the air prisms 12, 13 comprise at least one set E1 of two cooperating air prisms 12, 13, called simple air prisms. The air prisms are formed in the mass of the transparent body 5 being arranged at a distance from each other at least along the lateral dimension L2 of the transparent body 5. The simple air prisms 12, 13 of a the same set E1 of two simple air prisms form between them a circulation space, towards the output face 3 of the optical guide, light beams from the division of the beam to be divided FD.

More specifically, it is to consider at least one main set of cooperating reflectors 10a, 10b or 11a, 11b comprising at least one reflector 10a or 11a, said main division reflector. It is particularly noted that the main division reflector 10a or 11a is placed partly in the path of a beam to be divided FD. By its partial placement on the path of the beam to be divided FD, the main division reflector 10a or 10b directs a first fraction of the beam to be divided, said reflected beam FR, at least towards a reflection main reflector 11a or 11b. The main reflecting reflector 11a or 11b then directs the reflected beam FR in the longitudinal direction L1 to the exit face 3 of the light guide 1. Still due to its partial placement in the path of the dividing beam FD, the main reflector 10a or 10b division allows the flow towards the outlet face 3 of the light guide 1 of a second fraction of the beam to be divided, said non-reflected beam FNR. Diagrams (g) and (h) of FIG. 3 illustrate such dividing modalities of a beam to be divided FD derived from an elementary beam F1 or F2 constituting a given input beam FE1 or FE2, respectively on schema (g) and in the diagram (h) for both light sources S1, S2 of the optical module.

It is proposed a preferred embodiment for simply providing said at least one main set of cooperating reflectors 10a, 10b or 11a, 11b, or alternatively also at least one secondary set of cooperating reflectors as described below. According to the embodiment of the optical module shown in diagrams (f), (g) and (h) of FIG. 3, the main division reflector 10a or 11a is formed by at least one face of a first prism of single air 12 or 13. The main reflecting reflector 11a or 11b is formed by at least one face of a second single air prism 13 or 12 disposed at least laterally away from the first single air prism 12 or 13. The first single air prism 12 or 13 and the second single air prism 13 or 12 form between the main division reflector 10a or 11a and the main reflection reflector 10b or 11b a corridor C1 of the non-reflected beam FNR passage towards the exit face 3 of the light guide 1.

As a result, at the output of said at least one main set of cooperating reflectors 10a, 10b or 11a, 11b according to the propagation direction of the light through the light guide 1 between its input face 2 and its exit face 3, the reflected beam FR oriented by the main reflecting reflector 10b or 11b and the non-reflected beam FNR flowing along said corridor C1 are directed towards the exit face 3 of the light guide 1 parallel to the longitudinal direction L1. For a given input beam FE1, FE2 composed of N1 elementary beams F1, F2, the number of division beams Fsd composing the output beam FS1, FS2 is equal to N1 multiplied by two, respectively consisting of one said reflected beam FR and a said non-reflected beam FBR for each of the elementary beams F1, F2 composing said input beam FE1, FE2 given.

In the exemplary embodiment illustrated in diagrams (f), (g) and (h) of FIG. 3, it is to be noted the relative positioning modalities between the main division reflector 10a or 11a and the main reflecting reflector. 10b or 11b. Indeed, it is in particular proposed to parallel orientate said at least one main division reflector 10a or 11a and said at least one main reflection reflector 10b or 11b of the same main set of cooperating reflectors 10a, 10b or 11a, 11 b. In addition, said at least one divisional main reflector 10a or 11a and said at least one main reflecting reflector 10b or 11b of one and the same main set of cooperating reflectors 10a, 10b or 11a, 11b are each inclined by one same slope relative to the longitudinal direction L1, being disposed substantially in extension of one another in the longitudinal direction L1. As an indication, the angle of the inclination slope of the main division reflector 10a or 11a and the reflecting reflector 10b or 11b with respect to the longitudinal direction is greater than 0 ° and less than 45 °. The simple air prisms 12, 13 of the same set E1 of cooperating air prisms favorably provide two main sets of cooperating reflectors 10a, 10b and 11a, 11b. The main sets of cooperating reflectors 10a, 10b and 11a, 11b are respectively assigned to the division of beams to be divided FD originating from elementary beams F1, F2 emitted by elementary light sources 6,7 laterally adjacent and participating in light sources. S1 and S2 respectively.

More particularly, each of the simple air prisms 12, 13 of the same assembly E1 of cooperating air prisms provides at least: -) firstly at one of its faces the main division reflector 10a or 11a a first main set of cooperating reflectors. This main division reflector 10a or 11a is assigned to the division of a beam to be divided FD from a first elementary beam F1 or F2 constituting an input beam FE1 or FE2 emitted by a given light source S1 or S2 . -) on the other hand to another of its faces the main reflecting reflector 10b or 11b of a second main set of cooperating reflectors. This main reflecting reflector 10b or 11b is assigned to the division of a dividing beam FD coming from a second elementary beam F1 or F2 constituting an input beam FE1 or FE2 emitted by the other light source S1 or S2.

In other words, it is to consider two elementary neighboring light sources 6,7 respectively constituting two said light sources S1, S2 and placed on the support 8 alternately according to the lateral dimension L2 of the transparent body 5. For a the same set of co-operating reflectors, such as the reflectors 10a, 10b for example, is assigned to the division of a dividing beam FD emitted by a first elementary source of the same set of cooperating reflectors. light 6 constituting a first light source S1. A second main set of cooperating reflectors, 11a, 11b according to the example given, is assigned to the division of a dividing beam FD emitted by a second elementary light source 7 constituting a second light source S2. It is to be considered that the second elementary source of light 7 is disposed laterally on the support 8 in the vicinity of the first elementary light source 6. A first single air prism 12 provides the respective main face with the divisional reflector 10a. a first main set of cooperating reflectors 10a, 10b and the main reflecting reflector 11b of a second main set of cooperating reflectors 11a, 11b. A second single air prism 13 provides respective faces with the main division reflector 11a of the second main set of cooperating reflectors 11a, 11b and the main reflecting reflector 10b of the first main set of cooperating reflectors 10a, 10b.

Each of the simple air prisms 12,13 of the same set E1 of cooperating air prisms advantageously has in the general plane of extension of the transparent body 5 a profile at least partly substantially shaped in a triangle. The base of such a triangle is oriented along the longitudinal direction L1. The other two sides of such a triangle form the faces of the single air prism 12 or 13 respectively forming the main division reflector 10a or 11a and the main reflecting reflector 10b or 11b respectively assigned to the first main set of cooperating reflectors 10a. , 10b and the second main set of cooperating reflectors 11a, 11b. Said triangle is more specifically an isosceles triangle, conferring surfaces equal to the main division reflector 10a or 11a and the main reflecting reflector 10b or 11b formed by a single air prism 12 or 13. This main division reflector 10a or 11a and this main reflecting reflector 10b or 11b are oriented relative to each other according to an open angle dihedron. The bisector of such a dihedron is oriented perpendicular to the longitudinal direction. As an indication, the angle of said dihedron is greater than 0 ° and less than or equal to 90 °.

In the exemplary embodiment illustrated in FIG. 4, two simple air prisms 14, 15 are unified in the same air prism, then called dual air prism 16. More particularly, the double air prism 16 on the one hand unifies a single air prism 14 participating in at least a first set E1 of cooperating air prisms 14,17 and on the other hand a single air prism 15 participating in at least second set E2 cooperating air prisms 15,18. It is to be considered that the second set E2 of cooperating air prisms 15, 18 is close to the first set E1 of cooperating air prisms 14, 17 according to the lateral dimension L2 of the transparent body 5.

In these conditions and also referring to diagrams (i) and (j) of FIG. 5, it should be noted that the double air prism 16 advantageously accommodates the main division reflector 10a of a said first main set of cooperating reflectors 10a, 10b and the main reflecting reflector 11b of a said second main set of cooperating reflectors 11a, 11b. In addition, the dual air prism 16 at one of its faces the main reflector division 19a of a third main set of cooperating reflectors 19a, 19b assigned to the division of a beam to divide FD issued from a third elementary beam F3 constituting an input beam FE2 emitted by said second light source S2. In addition, the dual air prism 16 provides at another of its faces the main reflecting reflector 20b of a fourth main set of cooperating reflectors 20a, 20b assigned to the division of a beam to be divided FD from a fourth elementary beam F4 constituting an input beam FE1 emitted by said first light source S1. In the exemplary embodiment illustrated in FIG. 4 and in the diagrams (i) and (j) of FIG. 5, the double air prism 16 has in the general plane of extension of the transparent body 5 a substantially shaped profile. in rhombus composed of two so-called triangles arranged symmetrically on either side of a base common to both said triangles.

In other words and in FIG. 4 for example, the air prisms 14, 15 participants respectively of a first set E1 of cooperating air prisms 14, 17 and of a second set E2 of air prisms cooperating 15,18, are unified in the same double air prism 16. The air prisms 14,15 unified in the double air prism 16 are arranged symmetrically on either side of an axis of symmetry A oriented along the longitudinal direction L1. Said axis of symmetry A is defined by a base common to two so-called triangles, for recall respectively defining the profiles of two simple air prisms 14,15. The other two sides for each of the triangles define a dividing reflector 10a, 19a and a reflecting reflector 11b, 20b. The two said triangles together define the diamond conformation of the double air prism profile 16 in the longitudinal plane of the transparent body 5, one of the diagonals defines said axis of symmetry A.

According to the needs identified as a function of the number of elementary light sources 6,7 respectively composing the first light source S1 and the second light source S2, a plurality of dual air prisms 16 are advantageously formed in the mass of the transparent body 5 by being successively aligned along the lateral dimension L2 of the transparent body 5.

On the exemplary embodiments illustrated respectively on the one hand on the diagrams (k), (I) and (m) of FIG. 6 and on the other hand on the diagrams (n), (o) and (p) of FIG. 7, the light guide advantageously integrates several sets of cooperating reflectors. Such a plurality of sets of cooperating reflectors assigned to a given elementary beam F1, F2 makes it possible to further multiply the number of division beams FSd emerging outside the exit face 3 of the light guide 1. More particularly according to an illustrated embodiment in diagrams (k), (I) and (m) of FIG. 6, the air prisms 12, 13 forming the main sets of cooperating reflectors 10a, 10b; 11a, 11b can further be exploited to subdivide the reflected beam FR from the prior division of a given split beam FD. More particularly still according to an embodiment illustrated in the diagrams (n), (o) and (p) of FIG. 7, the transparent body 5 incorporates a plurality of air prisms successively placed in the longitudinal direction L1 along the path of light beams to divide FD from the same elementary beam F1, F2 given previously divided.

Thus, in the exemplary embodiment illustrated in diagrams (k), (I) and (m) of FIG. 6, a main set of cooperating reflectors 10a, 10b is to be considered individually; 11a, 11b and this for each of a plurality of main sets of cooperating reflectors 10a, 10b; 11a, 11b formed by the same set E1 or E2 of cooperating air prisms. On the basis of such consideration, said at least one set of cooperating reflectors further comprises at least one secondary set of cooperating reflectors 21a, 21b; 22a, 22b dividing a reflected beam FR by the main division reflector 10a, 11a into a plurality of divided reflected beams FRD1 or FRD2, and this applied to reflected beams from each of the elementary light sources 6,7.

In other words, a said first single air prism 12 and a said second single air prism 13 of the same set E1 of cooperating single air prisms jointly form two secondary sets of cooperating reflectors 21a, 21b; 22a, 22b. The secondary sets of cooperating reflectors 21a, 21b, 22a, 22b are respectively assigned to the division of the reflected beams FR respectively returned by the main division reflectors 10a, 11a formed by the same set E1 of simple air prisms 12,13 cooperating .

More particularly, said at least one secondary set of cooperating reflectors 21a, 21b; 22a, 22b comprises at least one reflector, said secondary division reflector 21a, 22a, placed partly in the path of said reflected beam FR. By its partial placement on the path of the reflected beam FR, the secondary division reflector 21a, 22a orients a first fraction of the reflected beam, said first reflected beam divided FRD1, to a secondary reflection reflector 21b, 22b. The secondary reflection reflector 21b, 22b then directs the first divided reflected beam FRD1 in the longitudinal direction L1 to the exit face 3 of the light guide 1. Still due to its partial placement in the path of the reflected beam FR, the reflector secondary division 21a, 22a allows the flow towards the main reflection reflector 21b, 22b a second fraction of the reflected beam, said second reflected beam divided FRD2. It is still necessary to note the usefulness of the space formed laterally between the air prisms 12, 13 allowing a circulation between them of the different light beams.

It follows from these provisions that for a given input beam FE1, FE2 composed of N1 elementary beams, the number of division beams FSd composing the output beam FS1.FS2 is equal to N1 multiplied by three. The division beams FSd composing the output beam FS1, FS2 are in this case, respectively consisting respectively of a non-reflected beam FNR, a first reflected beam divided FRD1 and a second reflected beam divided FRD2, and this for each elementary beams, such as F1, F2, F3, F4, composing said input beam FE1.FE2 given.

According to the embodiment illustrated, the secondary reflection reflector 21b or 22b of a first reflected reflected beam FRD1 resulting from the prior division of a beam to be divided FD by a main set of cooperating reflectors 10a, 10b; 11 a, 11 b given, is advantageously formed by the main reflecting reflector 10b or 11b of another main set of cooperating reflectors 10a, 10b or 11a, 11b. In this context, it is understood that the main sets of cooperating reflectors 10a, 10b and 11a, 11b are advantageously formed by the air prisms 12,13 participants of the same set E1 or E2 of air prisms cooperating.

It is to consider individually a secondary set of cooperating reflectors, 21 a, 21 b for example, and this for each of the simple air prisms 12,13 of the same set, E1 for example, of cooperating air prisms. The secondary divisional reflector 21a is advantageously formed by a set of cooperating reflecting surfaces 23a, 23b, 23c formed by the single air prism 12 or 13, at least one of whose faces forms the main reflecting reflector 10b or 11b. of a reflected beam FR.

More specifically, said set of cooperating reflecting surfaces 23a, 23b, 23c comprises a receiving surface 23a of the first divided reflected beam FRD1 from a division main reflector 10a or 11a considered. Said receiving surface 23a then directs the first reflected reflective beam FRD1 to a deflection surface 23b directing it towards the secondary reflecting reflector 21b or 22b. Optionally, the first divided reflected beam FRD1 is directed from the receiving surface 23a to the secondary reflecting reflector 21b or 22b via a participating reflecting surface 23c of the set of cooperating reflecting surfaces 23a, 23b, 23c.

It should be noted that the reflective surfaces 23a, 23b, 23c composing a same division secondary reflector 21a or 22a can be easily incorporated into the body of the transparent body 5. In the embodiment shown, said reflective surfaces 23a, 23b, 23c are advantageously formed by a projection 24 of the mass of the transparent body 5 oriented towards the inside of the single air prism 12 or 13 leaving the reflecting surfaces 23a, 23b, 23c cooperating. Said protrusion 24 has in particular a polygonal profile in the general plane of extension of the transparent body 5, such as a parallelepipedal profile on the exemplary embodiment illustrated. According to the demolding stresses of the transparent body 5, the relative orientations between the various reflecting surfaces 23a, 23b, 23c can be arranged without affecting the result obtained from the division of the reflected beam FR by the secondary divisional reflector 21a or 22a.

According to the advantageous embodiment illustrated in the diagrams (n), (o) and (p) of FIG. 7, a plurality of sets of cooperating reflectors assigned to the division of the same elementary beam F1, F2, are successively arranged according to the said longitudinal direction L1. For example, it is to consider individually each of the elementary beams F1, F2, F3 or F4. A group G of cooperating downstream reflector sets 10a, 10b and 20a, 20b or 11a, 11b and 19a, 19b is assigned to the subdivision of upstream division beams FD from a prior division of a division beam FD by at least one set of cooperating reflectors 10a, 10b or 11a, 11b upstream. The concepts downstream and upstream are considered in the direction of propagation of the light through the optical guide between its input face and its output face.

Still according to the exemplary embodiment illustrated in the diagrams (n), (o) and (p) of FIG. 7, the sets of cooperating downstream reflectors 10a, 10b and 20a, 20b or 11a, 11b and 19a, 19b of the same group G of cooperating reflectors each comprise at least one said main set of cooperating reflectors. The main set of cooperating reflectors constituting a same group G of cooperating reflectors is formed in particular by simple air prisms 14,17 or 15,18 cooperating. Of course, such simple air prisms 14,17 or 15,18 cooperating are potentially integrated into respective dual air prisms 16. In the alternative, the sets of cooperating downstream reflectors 10a, 10b and 20a, 20b; 11a, 11b and 19a, 19b of the same group G of cooperating reflectors each further comprise a said secondary set of cooperating reflectors 21a or 22a.

More particularly, the sets of cooperating reflectors 10a, 10b or 11a, 11b downstream of the same group G of cooperating reflectors are formed by said sets E1, E2 of simple air prisms 14, 15, 17, 18 respective of a group of sets E1, E2 of cooperating air prisms. Such sets E1, E2 of simple air prisms 14, 15, 17, 18 are advantageously arranged successively according to the lateral dimension L2 of the transparent body 5. The simple air prisms 14, 15, 17, 18 of the same group of sets E1, E2 of simple air prisms 14,15,17,18 cooperating advantageously arrange between them two by two tunnels C2 passage, to the outlet face 3 of the light guide 1, respectively a non-reflected beam FNR and a reflected beam FR from the same beam to divide FD upstream.

In the exemplary embodiment illustrated, the same group of sets E1, E2 of cooperating air prisms 14,15,17,18 comprises four simple air prisms 14,15,17,18. These four simple air prisms 14,15,17,18 comprise two single air prisms 14,15 unified in a double air prism 16 laterally interposed between two other simple air prisms 17,18. The four simple air prisms 14,15,17,18 provide at least two main sets of cooperating reflectors, 10a, 10b and 20a, 20b or 11a, 11b and 19a, 19b, for each of the FR splitting beams from of elementary beams F1, F2 constituting the input beams FE1, FE2 respectively emitted by one and the other of the light sources S1, S2. The sets of cooperating downstream reflectors 10a, 10b and 20a, 20b or 11a, 11b and 19a, 19b of the same group G of cooperating reflectors subdivide at least one non-reflected beam FNR and a reflected beam FR, or even the case optionally a divided reflected beam FRD1 or FRD2, in a plurality of light beams, said beams subdivided FSUB.

It follows from these provisions that for a given input beam FE1 or FE2 composed of N1 elementary beams F1, F2, the number of division beams FSd composing the output beam FS is equal to N1 multiplied by at least four. In this case, the division beams FSd are respectively constituted, for each of the elementary beams F1, F2 composing said given input beam FE1, FE2, of a said non-reflected beam FNR, of a said reflected beam FR and at least two FSUB subdivided beams respectively derived from a non-reflected beam FNR and a reflected beam FR, or even if appropriate from a said reflected beam divided FRD1, FRD2.

It should finally be noted that the beam to be divided FD by at least one set of cooperating reflectors is potentially any of: -) an elementary beam FE1, FE2, -) of a non-reflected beam FNR coming from a elementary beam F1, F2 previously divided by at least one set of cooperating reflectors, -) of a reflected beam FR coming from an elementary beam F1, F2 previously divided by at least one main set of cooperating upstream reflectors, -) of a reflected beam divided FRD1 or FRD2 from an elementary beam F1, F2 previously divided by at least one secondary set of upstream cooperating reflectors.

As a result, it is finally finally noted that the division beams FSd comprising an output beam FS coming from an input beam FE1, FE2 emitted alternately by any of the light sources S1, S2, potentially comprise the beams subsequent luminaires distributed over the entire surface of the output face 3 of the light guide 1: -) a plurality of non-reflected beams FNR from an input beam FE1, FE2 previously divided, -) a plurality of beams FR reflections from an input beam FE1.FE2 previously divided by main sets of cooperating reflectors respectively assigned to the division of the elementary beams F1, F2 composing the input beam FE1, FE2, -) a plurality of reflected beams subdivided FSUB from an FE1.FE2 input beam previously divided by main sets of upstream cooperating reflectors and then by main sets of reflectors cooperating downstream members respectively assigned to the division of the elementary beams F1, F2 composing the input beam FE1, FE2. Said subdivided reflected beams are composed of at least non-reflected beams FNR and reflected beams FR subdivided by main sets of cooperating reflectors downstream.

The optical module of the present invention is particularly suitable for a multifunction lighting and / or signaling of a motor vehicle. Such a multifunctional projector may advantageously be a light beam generator projector alternately providing a daylight function and a direction indication function.

As previously referred to, the light guide 1 may comprise incorporated air prisms 12, 13, 14, 15, 16, 17, 18 in the mass of the transparent body 5. More particularly, a method for obtaining a light guide 1 fitted to an optical module of the present invention is mainly recognizable in that the at least one air prism 12,13,14,15,16,17,18 is formed through the thickness of the body transparent 5 by insertion in drawer of a core of form inside a transparent body manufacturing mold 5.

Claims (29)

An optical module for a multifunction lighting and / or signaling projector of a motor vehicle, the optical module comprising at least two light sources (S1.S2) emitting alternately, under the control of a control means (4), differentiated colored lights whose light beams, called input beams (FE1, FE2), are alternatively admitted through the same input face (2) of a light guide (1) formed of a transparent body (5) generally flat, the light emitted alternately by the light sources (S1, S2) propagating through the light guide (1) from said input face (2) towards the same exit face (3) of the guide of light (1) in the form of light beams, said output beams (FS1, FS2), the input beams (FE1, FE2) and the output beams (FS1, FS2) being oriented in the same direction, said direction longitudinal, defined by the longitudinal dimension (L1) of the orps transparent (5) between its input face (2) and its output face (3), each of the light sources (S1, S2) being composed of a plurality of elementary light sources (6, 7) each emitting a light beam, said elementary beam (F1, F2), the elementary light sources (6, 7) constituting any light source (S1, S2) being arranged on a support (8) at least alternately according to the lateral dimension ( L2) of the transparent body (5) with the elementary light sources (6, 7) constituting another light source (S1, S2), characterized in that the light guide (1) incorporates a dividing means (9) of each of the elementary beams (F1.F2) respectively composing said input beams (FE1, FE2), said output beams (FS1, FS2) being each composed of a plurality of light beams, said division beams (FSd, FSd1 , FSd2), from the individual division of the elementary beams (F1, F2) and oriented by the dividing means (9) along respective projection axes parallel to the longitudinal direction (L1) being distributed over the entire exit face (3) of the light guide (1). 2. Optical module according to claim 1, characterized in that the dividing means (9) consists, for each of the elementary beams (F1, F2) respectively component light sources (S1, S2), at least one set cooperating reflectors (10a, 10b, 11a, 11b, 19a, 19b, 20a, 20b, 21a, 21b, 22a, 22b) incorporated in the mass of the transparent body (5) and placed in the path of a light beam, said beam to be divided (FD), issued from a given elementary beam (F1, F2) and oriented along the longitudinal direction (L1). 3. Optical module according to claim 2, characterized in that the cooperating reflectors of the same set of cooperating reflectors (10a, 10b; 11a, 11b; 19a, 19b; 20a, 20b; 21a, 21b; 22a, 22b). are formed by air prism faces (12,13) comprising at least one set (E1, E2) of two cooperating air prisms (12,13; 14,17; 15,18), said prisms of simple air, formed in the mass of the transparent body (5) and arranged at a distance from each other at least according to the lateral dimension (L2) of the transparent body (5), the simple air prisms (12, 13 14,17; 15,18) of the same set (E1, E2) of two simple air prisms (12,13; 14,17; 15,18) forming between them a circulation space, towards the face output (3) of the optical guide (1), light beams from the division of the beam to be divided (FD). 4. Optical module according to any one of claims 2 and 3, characterized in that at least one main game (10a, 10b, 11a, 11c, 19a, 19b, 20a, 20b) of cooperating reflectors comprises at least a reflector, said division main reflector (10a, 11a, 19a, 20a), placed partly in the path of a splitter beam (FD), the main division reflector (10a, 11a, 19a, 20a) in first orienting a first fraction of the beam to be divided, said reflected beam (FR), at least towards a main reflecting reflector (10b, 11b, 19b, 20b) directing the reflected beam (FR) in the longitudinal direction towards the face output (3) of the light guide (1) and secondly allowing the flow towards the exit face (3) of the light guide (1) of a second fraction of the beam to be divided (FD), said beam non-reflective (FNR). Optical module according to Claim 4, characterized in that the main division reflector (10a, 11a, 19a, 20a) is formed by at least one face of a first single air prism (12, 13, 14, 15,17,18) and in that the main reflecting reflector (10b, 11b, 19b, 20b) is formed by at least one face of a second single air prism (12,13,14,15, 17,18) arranged at least laterally at a distance from the first single air prism (12,13,14,15,17,18), the first single air prism (12,13,14,15,17,18 ) and the second single air prism (12,13,14,15,17,18) between the main division reflector (10a, 11a, 19a, 20a) and the main reflecting reflector (10b, 11b, 19b, 20b) a passage (C1) for the passage of the non-reflected beam (FNR) towards the exit face (3) of the light guide (1). 6. Optical module according to any one of claims 4 and 5, characterized in that said at least one main division reflector (10a, 11a, 19a, 20a) and said at least one main reflector (10b, 11b 19b, 20b) of the same main game (10a, 10b; 11a, 11c; 19a, 19b; 20a, 20b) of cooperating reflectors are oriented parallel to one another. Optical module according to the preceding claim, characterized in that said at least one main division reflector (10a, 11a, 19a, 20a) and said at least one main reflector (10b, 11b, 19b, 20b) the same main clearance (10a, 10b, 11a, 11c, 19a, 19b, 20a, 20b) of cooperating reflectors are each inclined with the same slope with respect to the longitudinal direction (L1) and are arranged substantially in extending from one another in the longitudinal direction (L1). 8. Optical module according to any one of claims 4 to 7, characterized in that the single air prisms (12,13,14,15,17,18) of the same set (E1, E2) of prisms cooperating air chambers provide two main sets of cooperating reflectors (10a, 10b, 11a, 11c, 19a, 19b, 20a, 20b) respectively allocated to the division of beams to be divided (FD) from elementary beams (F1, F2 , F3, F4) emitted from laterally neighboring and participating light sources (6, 7) of respective light sources (S1, S2). 9. Optical module according to any one of claims 5 to 8, characterized in that each of the simple air prisms (12,13,14,15,17,18) of the same set (E1, E2) of co-operating air prisms at least on one side, at one of its faces, the main division reflector (10a, 11a, 19a, 20a) of a first main set of co-operating reflectors assigned to the division of a beam to be divided (FD) from a first elementary beam (F1, F2, F3, F4) constituting an input beam (FE1, FE2) emitted by a given light source (S1, S2), and on the other hand, at another of its faces, the main reflecting reflector (10b, 11b, 19b, 20b) of a second main set of cooperating reflectors allocated to the division of a beam to be divided (FD) from a second elementary beam (F1, F2, F3, F4) constituting an input beam (FE1, FE2) emitted by the other light source (S1, S2). 10. Optical module according to the preceding claim, characterized in that each of the single air prisms (12,13,14,15,17,18) of the same set (E1, E2) of cooperating air prisms has in the general plane of extension of the transparent body (5) a profile at least partly substantially shaped as a triangle, whose base is oriented in the longitudinal direction (L1) and whose two other sides form the faces of the prism of single air (12,13,14,15,17,18) respectively providing the main division reflector (10a, 11a, 19a, 20a) and the main reflecting reflector (10b, 11b, 19b, 20b) respectively assigned to the first main set of cooperating reflectors and the second main set of cooperating reflectors. 11. Optical module according to any one of claims 3 to 10, characterized in that a single air prism (12,13,14,15,17,18) participating at least a first set (E1, E2) cooperating air prisms and a single air prism (12,13,14,15,17,18) participating at least second set (E1, E2) of cooperating air prisms adjacent to the first set (E1, E2) cooperating air prisms according to the lateral dimension (L2) of the transparent body, are unified in the same air prism, then called dual air prism (16). 12. Optical module according to the preceding claim, characterized in that the double air prism (16) not only cleaning the main reflector division (10a, 11a, 19a, 20a) of said first main game of cooperating reflectors and the main reflector for returning (10b, 11b, 19b, 20b) of said second main set of cooperating reflectors, but also on one side to one of its faces the main division reflector (10a, 11a, 19a, 20a) of a third main set of cooperating reflectors assigned to the division of a beam to be divided (FD) from a third elementary beam (F1, F2, F3, F4) constituting an input beam (FE1, FE2) emitted by a second light source (S1, S2), and on the other hand to another of its faces the main reflecting reflector (10b, 11b, 19b, 20b) of a fourth main set of cooperating reflectors assigned to the division of a beam to be divided (FD) from a fourth elementary beam e (F1, F2, F3, F4) constituting an input beam (FE1, FE2) emitted by a first light source (S1, S2). 13. Optical module according to any one of claims 11 and 12, characterized in that the double air prism (16) has in the general plane of extension of the transparent body (5) a substantially diamond shaped profile composed of two so-called triangles arranged symmetrically on either side of a base common to both said triangles. Optical module according to one of Claims 4 to 13, characterized in that, considering individually a main set of cooperating reflectors (10a, 10b, 11a, 11c, 19a, 19b, 20a, 20b) and for each of a plurality of main sets of cooperating reflectors formed by one and the same set (E1, E2) of cooperating air prisms (12, 13, 14, 15, 17, 18), said at least one set of cooperating reflectors comprises in in addition to at least one secondary set of cooperating reflectors (21a, 21b; 22a, 22b) dividing the reflected beam (FR) by the dividing main reflector (10a, 11a, 19a, 20a) into a plurality of divided reflected beams ( FRD1, FRD2). 15. Optical module according to the preceding claim, characterized in that the secondary set of cooperating reflectors (21a, 21b, 22a, 22b) comprises at least one reflector, said secondary division reflector (21a, 22a), placed in position. part in the path of said reflected beam (FR), the secondary divisional reflector (21a, 22a) first orienting a first fraction of the reflected beam, referred to as the first divided reflected beam (FRD1), to a secondary reflection reflector (21 b, 22b) directing the first divided reflected beam (FRD1) in the longitudinal direction (L1) to the exit face (3) of the light guide (1), and secondly allowing the flow to the deflecting main reflector (1 Ob, 11b, 19b, 20b) of a second fraction of the reflected beam, said second reflected reflected beam (FRD2). Optical module according to the preceding claim, characterized in that the secondary reflection reflector (21b, 22b) of a first divided reflected beam (FRD1, FRD2) resulting from the prior division of a beam to be divided (FD). by a main set of cooperating reflectors (10a, 10b; 11a, 11c; 19a, 19b; 20a, 20b) is formed by the main reflecting reflector (10b, 11b, 19b, 20b) of another main set of cooperating reflectors (10a, 10b; 11a, 11c; 19a, 19b; 20a, 20b). Optical module according to any one of claims 15 and 16, characterized in that, considering individually a secondary set of cooperating reflectors (21a, 21b, 22a, 22b) and for each of the single air prisms (12a). , 13, 14, 15, 17, 18) of the same set (E1, E2) of cooperating air prisms, the secondary divisional reflector (21b, 22b) is formed by a set of reflecting surfaces (23a, 23b, 23c) cooperating formed by the single air prism (12,13,14,15,17,18) of which at least one of the faces forms the main reflecting reflector (10b, 11b, 19b, 20b) of the reflected beam (FR). 18. Optical module according to the preceding claim, characterized in that the reflective surfaces (23a, 23b, 23c) forming a same division secondary reflector (21a, 22a) are formed by a projection (24) of the mass of the transparent body. (5) facing the interior of the single air prism (12,13,14,15,17,18) forming the cooperating reflecting surfaces (23a, 23b, 23c). 19. Optical module according to the preceding claim, characterized in that said projection (24) has a polygonal profile in the general plane of extension of the transparent body (5). 20. Optical module according to any one of claims 2 to 19, characterized in that several sets of cooperating reflectors (10a, 10b, 11a, 11c, 19a, 19b, 20a, 20b) assigned to the division of a same elementary beam (F1, F2, F3, F4) are arranged successively in said longitudinal direction (L1). 21. Optical module according to the preceding claim, characterized in that considering individually each of the elementary beams (F1, F2, F3, F4), a group (G) of sets of cooperating downstream reflectors (10a, 10b; 11a, 11c 19a, 19b, 20a, 20b) is assigned to the subdivision of upstream dividing beams (FD) resulting from a prior division of a beam to be divided (FD) by at least one set of upstream cooperating reflectors (10a, 10b 11a, 11c, 19a, 19b, 20a, 20b), the downstream and upstream notions being considered according to the direction of propagation of the light through the optical guide (1) between its input face (2) and its exit face (3). 22. Optical module according to the preceding claim, characterized in that the sets of cooperating reflectors downstream of the same group (G) of cooperating reflectors each comprise at least one said main set of cooperating reflectors (10a, 10b; 11a, 11 19a, 19b, 20a, 20b) formed by cooperating single air prisms (12, 13, 14, 15, 17, 18). 23. Optical module according to any one of claims 21 and 22, characterized in that the sets of cooperating reflectors downstream (10a, 10b, 11a, 11c, 19a, 19b, 20a, 20b) of the same group (G) cooperating reflectors are formed by said sets (E1, E2) of single air prisms (12,13,14,15,17,18) of a group of sets (E1, E2) of prisms of cooperating air, successively arranged along the lateral dimension (L2) of the transparent body (5). 24. Optical module according to the preceding claim, characterized in that the single air prisms (12,13,14,15,17,18) of the same group of sets (E1, E2) of air prisms (12,13,14,15,17,18) cooperating between them make two-by-two tunnels (C2) passing to the exit face (3) of the light guide (1) respectively an unreflected beam (FNR) and a reflected beam (FR) from the same beam to divide (FD) upstream. 25. Optical module according to any one of claims 23 and 24, characterized in that a same group of sets (E1, E2) of cooperating air prisms (12.13.14.15.17.18) comprises four air prisms. simple, including two simple air prisms unified in a dual air prism (16) laterally interposed between two other simple air prisms, the four simple air prisms (12.13.14.15.17.18) providing at least two sets of air cooperating reflectors (10a, 10b, 11a, 11c, 19a, 19b, 20a, 20b) for each of beams to be divided (FD) from elementary beams (F1, F2, F3, F4) constituting the beams of input (FE1.FE2) respectively emitted by one and the other of the light sources (S1, S2). 26. Optical module according to any one of claims 21 to 25, characterized in that the sets of cooperating downstream reflectors (10a, 10b, 11a, 11c, 19a, 19b, 20a, 20b) of the same group ( G) cooperating reflectors subdivide at least one non-reflected beam (FNR) and a reflected beam (FR) into a plurality of light beams, called subdivided beams (FSUB). 27. Multifunction lighting projector and / or signaling of a motor vehicle equipped with an optical module according to any one of claims 1 to 26. 28. Multi-function projector according to the preceding claim, characterized in that the projector is a light beam generator alternately providing a daylight function and a direction indication function. 29. A method for obtaining a light guide (1) fitted to an optical module according to any one of claims 3 to 26, characterized in that said at least one air prism (12,13,14,15 , 16, 17, 18) is formed through the thickness of the transparent body (5) by inserting into a drawer a shaped core within a mold for producing the transparent body (5).