JP2008293958A - Optical module for headlight of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical module for a headlight in which both of a dip beam and a high beam can be generated without using a masking screen. <P>SOLUTION: The optical module for a headlight of an automobile is provided with a main optical element having at least one main light source LP formed of one or more of light emitting diodes and at least one light projection system and a secondary optical element having at lease one secondary light source which generates a secondary optical beam and has a shape of a light emitting diode Ls1. Light generated by the secondary light source is directed in the direction of the light projection system and all the light generated by the secondary light emitting diodes are directed so as to be associated with at least one secondary reflecting or diffusing element M which can be displaced substantially, and the secondary reflecting or diffusing element prevents substantially an interference of light generated by the main light source LP. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention comprises a projection system, such as a lens, and a light source spaced, for example, behind the lens, via air, said light source being at least one light emitting diode (hereinafter abbreviated LED for brevity). And an optical module for an automotive headlight, which generates at least one beam having a cutoff.

  According to one embodiment of the present invention, the present invention relates to an LED described in a European patent based on European Patent Application No. EP06291291.9 filed on September 1, 2006 with Valeovision as the applicant. Although it is related to the module based on, it is not limited to this module alone. In this application, this European patent is incorporated by reference.

  This European patent describes a method of manufacturing a light projection module that generates a beam with a cut-off for an automobile, the light projection module being spaced apart by air behind a lens and the lens. A light source arranged in a state, the light source being formed by at least one light emitting diode so that it can be connected to the output surface of a similar adjacent module along a smooth and continuous surface The lens input surface is selected to have a light beam cutoff without the use of a masking screen, and the lens output surface is selected.

  This European patent application actually describes a different variant of a module that uses LEDs to obtain a beam with a cut-off, and one non-limiting variant, in particular relating to the present invention. That is, an example is described in which the light emitting diode is in the direct field of view of the associated lens, the diode is tilted with respect to the lens, and thus the diode and lens are positioned completely opposite each other. It should be noted that this tilt is selected to be positive or negative with respect to the optical axis, and the two types of tilt allow the beam thickness to be adjusted considerably. is there.

  The module of the type shown in FIG. 25A of the above European patent can be used as a single module for generating a beam, or part of a beam, with a horizontal or diagonal cut-off. If it is desired to project a part of the beam, this part of the beam is supplemented by another complementary beam emitted by a different known module, for example using a conventional halogen or xenon type light source (or power LED). it can. Thus, this module can be used so that the beam with the cut-off complements the dip beam of the dual function dip / high beam elliptical module so as to obtain a motorway type full beam.

  In addition, the present invention, as another example, is a French patent that has the application number FR 0606077 filed in France on June 23, 2006, with Valeovision as the applicant, incorporated herein by reference. It also relates to a module based on LEDs as described in. This French patent describes a headlight module for an automobile with a horizontal optical axis to generate a substantially square beam with a cutoff.

This headlight module
-At least one light source in the form of a light-emitting diode with a flat square light emitter protected by a transparent element;
-A parabolic reflector,
The light source is inclined at an angle with respect to the horizon (in a tilted manner so that the light beam generated by the reflector is thin and the upper edge of the light source is located near the focal point of the reflector); ), Placed so that it can be seen from the reflector,
The reflector has a surface on which a predetermined ray from the upper edge of the light source is reflected in the horizontal direction;

  In each of the embodiments as shown above in the earlier patent application, a problem arises when the elliptical module is changed to the high beam position. The reason is that the generated high beam completely fills the traffic regulation illumination grid, but adding an LED-based motorway beam that is complementary to this high beam, the driver is particularly With regard to height and width, it can be assumed that in the volume of the high beam, some discomfort is felt in the field of view, for example due to defects of values exceeding 5%.

  Therefore, it is considered to supplement the high beam with an additional beam that provides light to this upper region. However, the volume of the headlight is accurately calculated, and it is almost impossible to easily think of adding another light module dedicated to this function without completely changing the structure of the headlight.

  It is an object of the present invention to use, for example, a dip beam / high beam module, and an additional motorway beam type module (or more broadly, a traffic regulation function expected of an automobile headlight without using an additional light module. In order to be able to generate an additional beam to supplement the high beam type beam without substantially increasing the size of the headlight, including any other assembly of modules that allows to achieve all of There is to do.

The subject of the present invention is an optical module for a vehicle headlight comprising a main optical system, wherein the main optical system comprises:
A main optical element adapted to allow generation of a main light beam and comprising at least one main light source and at least one light projection system in the form of one or more light emitting diodes;
A secondary optical element adapted to generate a secondary light beam and comprising at least one, for example at least two secondary light sources, in the form of light-emitting diodes,
Each secondary light source
Related to elements for collimating or collecting the light generated by these secondary light sources,
Or, if possible, these collimating / collecting elements cause at least one of the light emitting systems to displace substantially all the light generated by the secondary light emitting diode in the direction of the light projection system. An automobile adapted to be associated with a secondary reflective or diffusive element, wherein the secondary reflective or diffusive element is adapted to substantially prevent interference of light generated by the main light source Is in the light module for headlights.

  In the meaning of the present invention, “light projection system” means one or more optical elements that are capable of forming a beam having a cutoff from the light source without the masking elements involved in the formation of the beam cutoff. Is.

  It is preferred that at least a part of the secondary light emitting diode, in particular the main part or the whole, is arranged in a volume delimited by the main optical system.

  It is preferable that the secondary light emitting diode is disposed substantially outside the optical path of the light beam generated by the main light source. This allows the car headlight to be more compact while demanding more functions, and inserts a secondary system that does not interfere with or substantially interfere with the main system, while providing extremely desirable space savings. The obtained main module is obtained.

  According to one embodiment, the main light source (s) generates light directly in the direction of the output lens of the main optical system. This is the direct light mode.

  According to another embodiment, the main light source (s) generate light in the direction of at least one reflective surface of the bending type. In this case, the light is displaced at least once before reaching the output lens.

  The light projection system preferably comprises an output lens that is convex forward or at least one reflector.

  Therefore, the present invention generates a secondary beam by a module that is already present in the headlight, maintains the initial volume of the module's volume larger or smaller, and uses this predetermined volume to Is proposed to function with one or more other light sources.

  This attempt is based on the fact that the primary optical element actually present in the first installed module in the headlight is disturbed by adding the required secondary optical element. And vice versa to ensure that the operation of the secondary optical element is not disturbed by the operation of the main optical element. Surprisingly, however, the two functions can coexist in a limited volume, and the module can substantially or simultaneously generate two beams that do not substantially interfere with each other, while particularly relating to one embodiment. It has been found that the beam can pass through a common output lens that is one of the types of projection systems.

  The details of the so-called main optical elements are not described here, but for further details refer to the examples described below for versions using the output lens according to the European patent or the first embodiment. be able to.

  Under general conditions, this main optical element comprises a lens and a light source including at least one light emitting diode, the light emitting diode being arranged behind the lens via air. The lens output surface is generally convex forward, and can be connected to the lens output surface of a similar nearby module along a smooth and continuous surface. The input surface of the lens is configured such that the module generates a light beam having a cutoff without the intervention of a masking screen, in particular a vertical masking screen.

  The present invention therefore relates to a variant in which the main LED is “in direct field of view” of the output lens without the need for a particularly bending type reflective surface.

  The second embodiment of the main optical element uses a projection system having at least one reflector, and the French patent FR0605677 can also be referred to for details.

In general, this main optical element is
A light projection system in the form of a reflector;
-At least one light source in the form of a light-emitting diode with a flat and square light emitter protected by a transparent element;
The lens is of a parabolic type,
The light source is inclined at an angle with respect to a horizon, the light beam supplied by the reflector is thin, and the upper edge of the light source is located close to the focal point of the reflector. It is arranged to look inclined from the vessel,
The reflector has a surface on which a predetermined ray from the upper edge of the light source is reflected in the horizontal direction;

  According to this second embodiment, the light projection system in the form of a reflector can be associated with a reflective mirror, which can also be a secondary reflective or diffusive element of the secondary optical element. it can. Thus, there is one optical element that is common to the primary and secondary optical elements.

  The terms “high”, “low”, “lateral”, “upper”, “lower”, etc. used in the rest of this specification are used in the module / headlight in the mounting position in the car. This relates to the position of the element to be examined once it has been placed. Further, the terms “front” and “rear” relate to the position of the element to be examined in accordance with the general propagation direction of light traveling from the inside to the outside of the module.

Regarding secondary optical elements,
According to an embodiment in which several secondary light sources are provided, the secondary light sources are dispersed with respect to each other so that the cone of light generated by these secondary light sources is incident on the secondary reflective or diffusive element It is preferable. Accordingly, a ring-shaped light distribution may occur around the main light source, above one of the main light sources or one of the side surfaces, or below. LEDs with a support and their individually associated connection means can be used.

  In contrast, a support common to all secondary LEDs can be used. This support has a flat, electrically insulating flexible support and an assembly of flat metal conductors that make electrical connections between electronic components, especially LEDs, also known as flexboard. Not only the flexible electronic support type, but also any possible accessory elements of the type such as heat sink, fixed support, reinforcement element, etc.

  The main direction of light emission of the secondary light source is preferably a direction toward the rear of the module. This direction is particularly suitable when the secondary LED is arranged above the main light source, or when the secondary LED is arranged laterally with respect to the main light source, the structure is arranged laterally, Inclined downward with respect to the horizon. A secondary reflective or diffusive element sends these rays back forward.

  The main light emission direction of the main light source is preferably directed forward of the module and inclined upward with respect to the horizontal line. Due to such a special structure described in detail in the above-mentioned European patent, when the main LED is exactly facing the input surface of the lens (the light emission direction of the LED is parallel to the optical axis of the module, It is possible to obtain a narrower light beam than in the case of a structure that is not formed.

  The secondary reflective or diffusive element is preferably an element having a surface that is partially reflective and partially diffusive. In principle, a reflective surface can be used, such as an aluminum coated surface, as commonly used to make headlight mirrors. However, it is also preferred to provide a surface that is at least partially diffusible. The ratio between the reflection coefficient and the diffusion coefficient can vary, for example, between 20/80 and 80/20.

  To adjust these two factors, one can use a reflective surface that is textured to reduce the reflection coefficient while controlling and increase the diffusion coefficient. By making the element at least slightly diffusive, the light from the secondary LED can be sent back while being more widely dispersed in the rotational angle direction. This is the purpose to be achieved and the problem is that the secondary beam illuminates the periphery more in the upper part of the illumination grid, so that the secondary beam is opposed to a spot of intense light Thus, in particular, it is possible to add light that is widely distributed / diffused with as little intensity as possible in the horizontal direction.

  If several secondary light sources are used, it is preferred that there is only one common secondary reflective or diffusive element for all secondary light sources.

  Alternatively, individual reflective or diffusive elements may be provided for each of the secondary light sources (these individual elements can eliminate individual collimating elements for the light source if possible). .

  The secondary reflective or diffusive element can be a substantially flat element. This is the simplest structure. The elements may be curved, in particular in two different directions, and may be substantially convex.

  According to one embodiment, if the element is common to all secondary light sources, this secondary reflective or diffusive element is placed in front of the main light source. The reason is that the resulting beam must be properly focused, so generally the main light source is located at or close to the focal plane of the lens. By placing a secondary reflective or diffusive element in front of the main LED, the lens can be out of focus, thereby providing a deliberately out of focus secondary beam, thus It is possible to diffuse in the direction of dispersion (although a reflective or focusing element can be placed behind the lens, a structure placed in front of the lens is preferred).

  A secondary reflective or diffusive element common to all secondary light sources and located in front of the main light source can have a notch that allows the light generated by the main light source to pass through. The presence of such cutouts does not interfere with the light cone generated by the main light source. The cutout may have a notch or may be in several parts around the main light source.

  In particular, the secondary reflective or diffusive element as common to all secondary light sources preferably has an optically active surface at least below or on each side of the main light source. Such an arrangement is advantageous in obtaining a secondary beam that is located high and broadly on the illuminance grid (compared to the conventional high beam distribution).

  The element for collimating or collecting the light from the secondary light source is preferably either a light source or a collecting mirror surrounding each of them, or a collimator made from a light transmissive material. . This collimator carries out a method of operation known from US 2006-0239020 corresponding to, for example, European Patent No. EP 1715247 filed by Valeovision. An improvement in the known structure is that the whole surface is flat in the known system, but the front surface is convex or concave. The front surface may be at least partially diffusive, structured, or provided with diffractive means.

  According to one embodiment, the light beam from the main light source is a complementary motorway / dip type dip beam generated by another light module of the same headlight, or a beam having a cutoff complementary to the high beam. It is.

  According to one embodiment that is preferably combined with the previous embodiment, the secondary light beam from the secondary light source is a beam that adds light above the main light beam.

  The present invention also relates to a headlight incorporating the optical module described above.

  Hereinafter, the present invention will be described with reference to examples shown in the drawings and not limiting the present invention.

  All of these drawings are extremely omitted, and to facilitate reading of the drawings, the illustrated elements are not necessarily shown according to actual dimensions.

  Series 1 example for generating a main beam using an optical projection system with an output lens as described in the above European patent application having application number EP06291291.9.

  Accordingly, FIG. 1 is a longitudinal sectional view along the vertical plane of the optical elements of the module M according to the first embodiment of the invention.

  The main optical function is exhibited according to the function described in the modified example of FIG. 25A of the above-mentioned European Patent No. EP06291291.9. The main LED LP on the support S is arranged at an inclination angle of about 45 ° with respect to the vertical line facing the lens L, and such a structure is also described in detail in this prior patent. Has been. Therefore, the LED LP is positioned in a plane oblique to the optical axis of the module M, and this structure generates a motorway type beam.

  The lens L has a convex output surface that can be smoothly connected to the output surface of any adjacent similar module, and the input surface of this lens can be cut without using a masking screen. It is configured to obtain OFF.

  A secondary optical function is realized by the three secondary LEDs Ls1, Ls2, and Ls3.

  FIG. 3 (perspective view) and FIG. 4 (plan view) show these three LEDs.

  It should be noted that unlike the above, only a single secondary light source can be used, i.e. a suitable high power LED can be selected. This single LED can also be placed above, laterally or below the main LED.

  Each of the three secondary LEDs described in FIGS. 1, 3 and 4 is made of a transparent material fixed to an individual support not shown and adapted to collect the light generated by the LEDs. Associated with manufactured collimator.

  FIG. 8 schematically shows an example of a non-limiting shape of the collimator C. Here, the collimator has a substantially hat shape or a cone shape, and is a solid part having a light input surface FE generated by rotation. The light input surface has two side walls PL and a convex shape. And has a peripheral shape including a hollow portion delimited by a bottom wall PF. The light emitting surface of the LED faces the hollow portion / is at least partially located in the hollow portion.

  The output surface FS is slightly round and convex, preferably cylindrical (or may be flat). Such a special shape of the output surface makes it possible to diffuse the beam from the secondary LED that is spaced apart from the lens L in particular.

  As shown in FIGS. 1, 3 and 4, the secondary LEDs Ls1, Ls2, and Ls3 and their associated collimators C1, C2 and C3 are arranged above the main LED LP, and these Are arranged in the ring so that the light separated from the collimator converges toward the reflection mirror M.

  This mirror is flat and, like the plane on which the main LED LP is located, is arranged at an angle of 45 degrees on the oblique plane, and the plane is offset slightly forward with respect to the plane of the LED LP. Yes. This mirror M is U-shaped with a suitable notch so as not to block (or hardly block) the light generated by the main LED LP.

  3 and 4 show, for each of the secondary LEDs, these three rays, which show the course of the ray according to each of the main emission directions, converge towards the mirror M, which mirrors this ray into the lens L I think you can understand that it ’s sent back towards.

  This mirror is a metal sheet (or a plate made from a polymer material) coated with an aluminum film. The aluminum film is deposited to have a reflection coefficient of about 70% and a diffusion coefficient of about 30% (the ratio of these coefficients can be adjusted considerably if necessary). Surface texturing can be used to change the diffusion coefficient. A mirror can be provided on the mirror.

  Returning to the description of FIG. In FIG. 1, only the cross section of the central secondary LED is shown, and the following is shown. That is, one shows the limit of the light cone generated from the main LED LP, and the other, three restricted rays from the secondary LED Ls2. The first ray r1 indicated by the dotted line corresponds to the last lateral ray that is spaced back from the collimator back to the mirror M, and the second ray r2 indicated by the dotted line corresponds to the front edge of the collimator. It is a critical ray. The third ray r3, shown as a solid line, corresponds to the central ray (similar to the ray shown in FIGS. 3 and 4).

  FIG. 2 shows a modification of the module shown in FIGS. The plane p2 on which the mirror M is provided is offset from the plane of the mirror p1 shown in FIG. 1 by an angle α of 5 ° or 10 °, for example. It can be seen from the course of the rays in FIG. 2 (which has the same promise as in FIG. 1) that changing the mirror tilt in this way changes the direction of the rays from the secondary LED at the output of the lens L.

  The ray r3 by the mirror with an initial tilt of 45 ° by the plane p1 and the r'3 by the mirror with a modified tilt by the plane p2 are shown. r'3 is further away from the lens than r3. By changing the arrangement, tilt, shape and reflecting / diffusing power of the mirror M, the distribution of light generated by these secondary LEDs at the output of the lens and the overall orientation can be adjusted very precisely according to the conditions. it can.

  This mirror may not be absolutely flat in practice, but such a shape is the easiest to manufacture. The mirror can have, for example, a round surface, can be convex or concave, and can be deformed to adjust the secondary beam.

  FIG. 5 is a view of the module as seen from the outside of the module. A lens that closes the module from the front, three support planes Sp of the three secondary LEDs in the upper part, and an inclined plane p1 on which the reflection mirror M is arranged are shown. It is possible to add secondary LEDs and their associated optical means to the initial module without substantially increasing the size of the module and without optically interfering with the beam generated by the primary LED LP I think you can understand. (The heat sink type cooling means for the LED is not shown).

  FIG. 6 shows a modified embodiment. Each secondary LED, such as shown as Ls1, is no longer associated with a collimator, but is associated with a reflector R in one or more components, which reflector of the light generated by the LED. The cone is surrounded and this light is sent back toward the reflection mirror M. The reflector R can also be provided with a ridge. Further, there may be no reflecting mirror, and each reflector R directs the light from the secondary LED directly to the lens L.

  FIG. 7 shows a modified embodiment. In such a simplified view of the module, the secondary LED is located on one side, not on the main LED LP. Next, the reflection mirror M is disposed via individual collimators or reflectors so as to face the light cone generated by the secondary LED.

  Of course, it is also possible to place a secondary LED below or behind the main LED. It can also be thought of to be placed on the back of the main LED. When placed on the back of the latter main LED, the reflecting mirror can be omitted, but such a structure is related to the problem of the size of the module to be minimized as compared to the initial module that does not use the secondary LED. Generally not very appropriate (especially in terms of depth).

  9, 10 and 11 are diagrams showing isoilluminance points.

  FIG. 9 is a diagram showing isoillumination points of a high beam type beam generated in a known manner by an elliptical type high beam module of a xenon sphere, and one module is built in the same headlight as the module according to the present invention. Has been.

  FIG. 10 is a diagram showing the isoillumination point when the contribution of the beam for the motorway obtained by the main beam generated by the main LED LP of the module according to the present invention is added to the isoillumination point of FIG. It is.

  FIG. 11 is obtained by adding the contribution of the secondary beam generated by the three secondary LEDs of the modified example related to FIG. 1 to the isoillumination point of FIG.

  By comparing the above figures, the following conclusion can be obtained. In the high beam according to FIG. 9, the maximum intensity reaches about 100 lux. The contribution of the motorway shown in FIG. 10 increases the overall strength by about 1.5% so that the maximum strength is about 150 lux in the axis. Such beam superposition is described in a French patent having the patent application number FR0605431 filed on 19 June 2006 by Valeovision, for which reference is made to this patent.

  With the addition of the secondary LED contributions according to FIG. 11, significantly diffused light is shown in the upper part of the grid above the dome defining the high beam of FIG. Thus, the secondary LED produces a diffused light that is highly diffused in the horizontal direction in the upper part, and this diffused light is in sharper contrast with the highly illuminated dome of the high beam than the extremely dark upper region. Has substantially increased visual comfort.

  FIG. 12 shows a series 2 example using an optical projection system with a reflector as described in the above patent application FR0605677 to generate the main beam.

  FIG. 12 is a schematic diagram of a module whose main optical elements are of the type described in FIG. 4 of this patent, see this patent for details. FIG. 12 shows a main LED LP, a reflection mirror M, and a parabolic reflector RP. In front of the reflector RP, a diode LP is arranged in a substantially horizontal plane. The diode is preferably provided with a dome-shaped or non-dome-shaped transparent element. The mirror M is a flat mirror that generates a virtual image of the diode LP constituting the light source for the reflector RP.

  According to the invention, a secondary LED Ls1 is added, which is arranged such that at least part of the generated light is sent by its light emitting surface towards the mirror M. Therefore, the mirror M sends back both the lights generated by the main LED Lp and the secondary Lp Ls1 toward the reflector RP. The reflector RP redirects the received light to the front of the module. Therefore, this structure is such that the reflection mirror M, which is an optical element, is common to both the main function and the secondary function.

FIG. 13 shows in detail the optical paths generated by LP and Ls1.
Two rays lp1 and lp2 generated by the main light source LP and sent back substantially horizontally or downward by the reflector RP.
One ray ls1 generated by the secondary light source Ls1, once reflected by the RP and having a pronounced upward direction.

  FIG. 14 shows a modification of the module shown in FIGS. The difference is in the arrangement of the secondary LED Ls1. This secondary LED is arranged behind the main LED LP and along an oblique plane, and is provided with a collimator C. Therefore, this system collects more light from Ls1 than the previous structure. FIG. 14 shows the two light paths from LP: lp1 and lp2 and the two light paths from Ls1: ls1 and ls2. From these light paths, it can be seen that the light from Ls1 clearly has a tendency to have an upward direction at the output of the module.

  FIG. 15 is a diagram of the equi-illuminance points of the superposition of the high beam of the previous xenon elliptic module, the beam of the motorway in which LP is generated, and the secondary beam obtained by the LED Ls1, and the LED Ls1 is the region Zi. The light is added above the high beam dome.

  All of the above examples use white (or yellow if applicable) light LEDs, which are the traffic rules for dip beams, as the primary and secondary LEDs.

Fig. 4 is a schematic illustration of the main and secondary optical elements of a module according to variant A of the present invention along a longitudinal section in a vertical plane passing through one of the secondary LEDs. It is a modification of FIG. FIG. 2 is a perspective view of the module shown in FIG. 1 with all secondary light sources shown. FIG. 2 is a plan view of the module shown in FIG. 1. FIG. 2 is an external view of the module shown in FIG. 1. Fig. 6 is a schematic diagram of variant B according to the invention, in which only one secondary light source, its associated reflecting means and output lens are shown. Fig. 6 is a schematic diagram of variant C according to the invention, in which only the secondary light source in the lateral structure and the associated reflective elements are shown; It is a schematic sectional drawing of the collimator of the secondary LED concerning this invention. 6 is a schematic diagram showing isoilluminance points of a high beam type beam distribution obtained by a xenon sphere elliptic module. FIG. 8 is a schematic diagram showing the iso-illumination points of the light distribution of the combination of the high beam type beam shown in FIG. 7 and the motorway type beam obtained by the main optical elements of the module shown in FIG. 1. The distribution of the combination of the high beam type beam and the motorway type beam obtained with the main optical element of the module shown in FIGS. 1 and 8 is generated from the secondary optical element of the module shown in FIG. FIG. 6 is a schematic diagram showing iso-illuminance points to which a distribution of secondary beams to be added is added. FIG. 6 is a schematic perspective view of a main optical element and a secondary optical element of another module according to the present invention. FIG. 13 is a cross-sectional view of the module shown in FIG. 12 along a vertical plane. FIG. 13 is a cross-sectional view of a variation of the module shown in FIG. 12 along a vertical plane. The distribution of the combination of the high beam type beam and the motorway type beam obtained by the main optical elements of the module shown in FIGS. Fig. 6 is a schematic diagram showing iso-illuminance points with the distribution of secondary beams generated from the elements added.

Explanation of symbols

Ls1, Ls2, Ls3 Secondary LED
C1, C2 and C3 Collimator FE Light input surface PL Lateral wall PF Convex bottom wall FS Output surface r1, r2, r3 Ray M Mirror Sp Support plate R Reflector RP Reflector

Claims (22)

In an optical module (Mo) for automotive headlights, including the main optical system,
The main optical system is:
A main optical element adapted to generate a main light beam and comprising at least one main light source (LP) in the form of one or more light emitting diodes and at least one light projection system;
A secondary optical element adapted to generate a secondary light beam and comprising at least one, for example at least two secondary light sources, in the form of light emitting diodes (Ls1, Ls2, Ls3); Prepared,
Each secondary light source
Associated with an element for collimating (C) or collecting (R) the light generated by this secondary light source;
Where possible, these collimating / collecting elements are adapted to displace substantially all the light generated by the secondary light emitting diode in the direction of the light projection system. Associated with two secondary reflective or diffusive elements (M), said secondary reflective or diffusive elements substantially preventing light interference generated by the main light source (LP) An optical module (Mo) for an automobile headlight, characterized in that   The optical module according to claim 1, wherein at least a part of the secondary light emitting diode is disposed in a volume delimited by the main optical system.   The optical module according to claim 2, wherein the secondary light emitting diode is disposed substantially outside an optical path of a light beam generated by the main light source.   The optical module according to claim 1, wherein the main light source (s) generates light directly in the direction of the output lens of the main light system.   4. The optical module according to claim 1, wherein the main light source (s) generates light in the direction of at least one reflecting surface of the bending type.   6. The light projection system according to claim 1, comprising an output lens (L) convex toward the front or at least one reflector (RP). 7. Optical module. The main optical element is:
An optical projection system in the form of a lens (L);
A light source comprising at least one light emitting diode (LP) disposed behind the lens and spaced apart by air;
The output surface of the lens is generally convex toward the front so that the output surface of the lens can be smoothly and continuously connected to the output surface of the lens of a nearby module. The input surface of the lens is configured such that the module generates a light beam having a cut-off without interposing a masking screen. The optical module described in one. The main optical element is:
An optical projection system in the form of a reflector (RP);
Comprising at least one light source in the form of a light emitting diode (LP) having a flat and square light emitter protected by a transparent element;
The lens (RP) is of a parabolic type,
The light source (LP) is inclined at an angle with respect to a horizon, the light beam supplied by the reflector (RP) is thin, and the upper edge of the light source is the focal point of the reflector (RP). It is arranged so as to be tilted from the reflector (RP) so as to be located nearby,
The said reflector (RP) has the surface where the light ray from the upper edge of the said light source (LP) is reflected in a horizontal direction, The any one of Claims 1-7 characterized by the above-mentioned. The optical module described in one. The main optical element is:
A light projection system in the form of a reflector (RP) associated with a reflecting mirror (M);
The optical module according to any one of claims 1 to 3, wherein the reflection mirror (M) is also a secondary reflective or diffusive element (M) of the secondary optical element.   Several secondary light sources (Ls1, Ls2, Ls3) dispersed in each other are provided so that the light generated by these light sources is incident on the secondary reflective or diffusive element (M). The optical module according to claim 1, wherein the optical module is provided.   The main light emission direction of the secondary light source (s) (Ls1, Ls2, Ls3) is directed to the rear of the module and is inclined downward or laterally with respect to a horizontal line. The optical module according to claim 1.   The main light emission direction of the main light source (LP) is directed forward of the module and is inclined upward with respect to a horizontal line. The optical module as described in.   13. The secondary reflective or diffusive element (M) is an element having a surface that is partly reflective and partly diffusive. The optical module according to one.   Several secondary light sources (Ls1, Ls2, Ls3) are provided and only one common secondary reflective or diffusive element (M) for all secondary light sources is provided, or 14. Optical module according to any one of the preceding claims, characterized in that an individual reflective or diffusive element (R) for each of the secondary light sources is provided.   The secondary reflective and diffusive elements (M) are common to all the secondary light sources (Ls1, Ls2, Ls3) and are preferably arranged in front of the main light source (LP). The optical module according to claim 1, wherein the optical module is characterized in that   Several secondary light sources (Ls1, Ls2, Ls3) are provided, the secondary reflective or diffusive element (M) is common to all of the secondary light sources and the main light source (LP) The optical module according to claim 1, further comprising a cutout that allows light generated by the light to pass therethrough.   Several secondary light sources (Ls1, Ls2, Ls3) are provided, the secondary reflective or diffusive element (M) is common to all of the secondary light sources, and the main light source (LP) The optical module according to claim 1, wherein the optical module has an optically active surface at least below or on each side.   The element for collimating or condensing light from the secondary light source (s) (Ls1, Ls2, Ls3) is the light source, or a collecting mirror (R) surrounding each of them The optical module according to claim 1, wherein the optical module is a collimator manufactured from a light-transmitting material.   The collimating element for the secondary light source (s) is a collimator (C) with a flat, convex or concave front surface, or at least partially diffusive or structured. Optical module according to any one of the preceding claims, characterized in that it has a front surface that is provided or provided with a diffractive element.   The main light beam from the main light source (LP) is a complementary motorway / dip type dip beam generated by another optical module of the same headlight, or a beam having a cutoff complementary to a high beam. The optical module according to claim 1, wherein there is an optical module.   21. The secondary light beam from the secondary light source (s) (Ls1, Ls2, Ls3) is a beam that adds light above the main light beam. An optical module according to any one of the above.   A headlight incorporating the optical module (Mo) according to any one of claims 1 to 21.

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