Lighting module
The lighting module addresses compactness and uniform illumination challenges by using a primary lens with differently inclined diopter portions and reflection surfaces, achieving regulatory compliance and safety through precise light distribution.
Patent Information
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- VALEO VISION SA
- Filing Date
- 2022-12-22
- Publication Date
- 2026-06-05
AI Technical Summary
Existing lighting modules in motor vehicles face challenges in achieving compactness and uniform illumination while complying with regulatory requirements, particularly in creating dark-free illuminated areas and reducing module size.
A lighting module design featuring a primary lens with a first entrance diopter having two differently inclined portions and strategically positioned reflection surfaces, allowing light rays from multiple rows of light sources to be refracted and reflected to create a homogeneous illumination pattern, including a sharp upper cutoff and a spread-out lower zone, while reducing module size.
The design achieves a compact lighting module with uniform illumination, ensuring compliance with regulatory standards by eliminating dark areas and enhancing safety through precise light distribution.
Smart Images
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Abstract
Description
Title of the invention: Lighting module technical field
[0001] The present invention relates to the field of lighting, including signaling, and to the components, particularly optical components, involved therein. It finds a particularly advantageous application in the field of motor vehicles. In particular, it relates to a lighting module. STATE OF THE ART
[0002] In the automotive sector, modules capable of emitting light beams, also called lighting and / or signaling functions, are known.
[0003] These modules must comply with applicable regulations, which vary from country to country, by emitting light specifically in certain areas so as to exclude areas that must remain dark, and doing so uniformly to avoid leaving dark patches within the area that must be illuminated. One of the constraints that manufacturers also face is reducing the module's size to make it as user-friendly as possible.
[0004] In order to best achieve these various objectives, a technical solution has been proposed in document FR3077362 A1. This solution is based on the development of a projector equipped with three beams, forming a low beam combined with a high beam to obtain the desired light distribution. The distinctive feature of this solution lies in the fact that the low beam passes through a waveguide in which it undergoes several internal reflections, allowing the light beam to be directed to the desired positions.
[0005] However, this type of solution has disadvantages, in particular the fact that it does not allow for sufficient compactness and security due to the attributes of the illuminated areas.
[0006] An object of the present invention is therefore to propose a module making it possible to overcome all or part of the aforementioned disadvantages.
[0007] The other objects, features and advantages of the present invention will become apparent from an examination of the following description and accompanying drawings. It is understood that other advantages may be incorporated. SUMMARY
[0008] To achieve this objective, according to one embodiment, a lighting module is provided comprising: - a first row of first light sources including light sources miners aligned along a first direction, - a set of second light sources, - an optical axis, a first plane being defined so as to contain the first direction and be perpendicular to the optical axis, - a primary lens comprising a first entrance diopter and an exit diopter, the first entrance diopter being configured to receive light rays from the first light sources in the first row, the exit diopter being configured to transmit light rays from the first light sources in the first row and received by the first entrance diopter, the primary lens further comprising: - a second input diopter, a first reflection surface and a second reflection surface, the second input diopter being configured to receive light rays from the second light sources of the assembly and to transmit them to the first reflection surface, the first reflection surface being configured to reflect, towards the second reflection surface, light rays from the second light sources of the assembly, characterized in that the second reflection surface is configured to reflect, towards the output diopter, the light rays from the second light sources of the assembly after their reflection on the first reflection surface, and in that the first input diopter comprises a first portion and a second portion joined by a junction line, the first portion and the second portion being inclined differently with respect to the optical axis.
[0009] It appears that the two portions of the first entrance diopter generate, by their different inclination, a different refraction in the entrance into the lens, thus inducing a greater diversity of direction of the light rays coming from the first row, which promotes the homogeneity of illumination of the area corresponding to its rays in the final projected beam.
[0010] Thus, the fact that the rays from the first light sources in the first row can partly pass through the first portion of the first entrance diopter and partly through the second portion of the first entrance diopter (which is inclined differently with respect to the optical axis than the second reflecting surface) makes it possible to create, as we can observe in [Fig. 4], a different illumination configuration depending on the surface through which the rays pass. More precisely, in [Fig. 4], we can observe an upper zone with a sharp upward cutoff, while the lower zone of the same figure has a wider and less clearly defined spread (the illumination in the lower zone can be described as a "smear" due to its spread and distorted shape), the upper zone corresponding to the rays that have passed through the second portion of the first diopter. of entry while the lower zone corresponds to the rays having passed through the first portion of the first entry diopter.
[0011] Furthermore, the positioning of the first reflection surface and the second reflection surface makes it possible to create a lighting module in which the first light sources and the second light sources share the same output diopter, leading to a reduction in the size of the lighting module.
[0012] According to an advantageous embodiment, the first portion forms part of the second reflection surface. In this case, the corresponding part of the second reflection surface has a dual function: on the one hand, it performs total internal reflection of the rays from the second sources; on the other hand, it ensures the entry of certain rays from the second row with a particular refraction at this level due to its inclination.
[0013] Thus, since the first portion forms part of the second reflecting surface, the second reflecting surface is joined to the first entrance diopter and specifically to the second portion. Consequently, as observed in [Fig. 4], the area illuminated by the light rays from the first light sources that have passed through the first portion will be located in an area also partially illuminated by the light rays from the second light sources.Indeed, the rays from the second light sources intercept the second reflective surface by reflection before reaching the exit diopter, while the light rays from the first light sources intercept the first portion by refraction. This leads all these light rays to be directed (after passing through the projection lens) towards an area positioned below the area towards which the rays from the first light sources, having passed through the second portion, are directed after passing through the projection lens. The lower area of [Fig. 4], constituting what we have called the "burr," will therefore create a transition zone between the beams from the second light sources and those from the first light sources, in order to create a homogeneous luminosity (in the overall area considered) without dark areas.
[0014] According to another advantageous embodiment, the first row of first light sources is positioned in a direction transverse to the first direction such that between 50% and 70% of the light rays from the first row of first light sources are refracted by the first portion.
[0015] This lighting module therefore allows, by the position of the first light sources in relation to the junction line, to obtain a desired vertical spread of the beam from the first light sources, which can in particular be a cut-off beam from a dipped beam. BRIEF DESCRIPTION OF THE FIGURES
[0016] The aims, objects, features and advantages of the invention will become clearer from the detailed description of an embodiment thereof, which is illustrated by the following accompanying drawings in which:
[0017] [Fig.1] Fig.1 represents a cross-sectional view (at the level of the optical axis) of the lighting module according to the invention where the paths of the light rays can be observed.
[0018] [Fig.2] [Fig.2] represents an enlarged view of an area of [Fig.1] comprising including the first, second, third and fourth row of first light sources, the first entrance diopter and the second reflection surface where the paths of the light rays can be observed.
[0019] [Fig.3] Fig.3 represents the first, second, third and fourth row of first light sources and in particular the positioning of the junction line in relation to the first row of first light sources.
[0020] [Fig.4] Fig.4 represents the isocandela curves of the light intensity emitted of a cut-off beam for dipped beam, according to the invention where the configuration of the lower zone is due to the transmission of light rays from the first light sources through the first portion.
[0021] The drawings are given by way of example and are not limiting of the invention. They constitute schematic representations of principle intended to facilitate understanding of the invention and are not necessarily to scale with practical applications. DETAILED DESCRIPTION
[0022] Before proceeding with a detailed review of embodiments of the invention, optional features that may be used in combination or alternatively are listed below:
[0023] According to one example, the first portion 5aa is positioned at the upper end of the first input diopter 5a, the first portion 5aa extending from the junction line 15 to the output diopter 12.
[0024] This configuration makes it possible to form a primary lens 5 comprising in particular in the upper part a set of surfaces joined together, in order to prevent light rays from exiting the lighting module without having participated in the lighting function.
[0025] According to one example, the second reflecting surface 9 has a concave profile so as to direct light rays from the set 4 of second light sources towards the output diopter 12.
[0026] Thus, in this way, the light rays emanating from set 4 of second light sources participate in the lighting function as desired and are not excluded from it.
[0027] According to one example, the second reflection surface 9 forms with the second portion 5ab of the first entrance diopter 5a an angle between 115° and 155°.
[0028] This configuration allows for different lighting configurations depending on whether more upward or downward lighting is desired.
[0029] According to one example, the junction line 15 is projected onto the first row 1 of first light sources in a direction parallel to the optical axis 13 so as to divide the first row 1 of first light sources into an upper part and a lower part, the upper part being between 0% and 20% larger than the lower part.
[0030] This configuration allows the positioning of the first light sources of the first row 1 to be adjusted relative to the junction line, in order to precisely control the height of the beam cutoff formed by the first light sources. Thus, for each first light source, a light segment is formed by the superposition of the light emitted by the upper and lower portions of the light source.
[0031] According to one example, the lighting module includes a third reflecting surface 14, the third reflecting surface 14 being configured so that light rays from the set 4 of second light sources are reflected on the third reflecting surface 14 after their reflection by the first reflecting surface 8 and before their reflection by the second reflecting surface 9.
[0032] The arrangement of this third reflective surface 14 allows, with a folding effect, to take into account in the final resulting lighting the maximum of the light rays coming from the set 4 of second light sources.
[0033] According to one example, the third reflection surface 14 is at least partly formed by the second portion 5ab of the first entrance diopter 5a.
[0034] Thanks to this configuration, the third reflection surface 14 and the second portion 5ab are on the same plane, thus causing the light rays from the second light sources to be reflected on the second reflection surface 9 after being reflected on the third reflection surface 14. This configuration also allows a simplification of the lighting module.
[0035] According to one example, the second portion 5ab of the first entrance diopter 5a is inclined with respect to the first plane pl by an angle between 0 and 10° so that the angle between said second portion 5ab and the first reflection surface 8 decreases.
[0036] This configuration allows for a compromise between a desired light distribution and sufficient luminance. This configuration also allows for different lighting configurations to obtain more or less bright lighting. less towards the top of the exit diopter.
[0037] According to one example, the exit diopter 12 comprises an upper part 6 having an upper curvature 6a and a lower part 7 having an lower curvature 7a, the upper curvature 6a being more convex than the lower curvature 7a.
[0038] Thus, the fact that the upper curvature 6a is more convex than the lower curvature 7a allows for greater illumination in the upper part of the illuminated area, which also allows for increased safety.
[0039] According to one example, the lighting module includes collimators 10, each collimator 10 being associated with a second separate light source 4, each collimator 10 receiving light from said source and sending it in a collimated manner to the second input diopter 5b.
[0040] Positioning a collimator associated with each light source in the set of second light sources makes it possible to obtain, individually for each light source in the set of second light sources, a collimated beam, that is to say, a beam composed of parallel light rays. Due to their direction of intersection with the second input diopter 5b, this configuration allows for better control of the path of these light rays to the output of the lighting module.
[0041] According to one example, the first row 1 of first light sources is configured to form a cutoff beam of a dipped beam.
[0042] According to one example, the set 4 of second light sources is configured to form a low beam near field.
[0043] Thus, the fact that the rays from the first light sources in the first row 1 can selectively pass through two distinct surfaces, combined with the fact that the resulting beam from these light sources can be a low-beam cutoff beam, makes it possible to create, as illustrated in [Fig. 4], a sharp upper zone providing the left / right cutoff and a spread-out lower zone providing the necessary complement to solve part of the technical problem of the invention. Indeed, this lower zone will be the transition with the beam from the second set 4 of light sources (which can be a low-beam near-field beam) due to the reflection of this beam on the second reflecting surface 9.
[0044] According to one example, the lighting module includes a second row of first light sources 2 comprising light sources aligned along a second direction d2, the second direction d2 being parallel to the first direction dl, the second row of first light sources 2 being positioned below the first row 1 of first light sources.
[0045] According to one example, the lighting module comprises a third row of first light sources 2a comprising light sources aligned along a third direction d3 and a fourth row of first light sources 2b comprising light sources aligned along a fourth direction d4, the third direction d3 and the fourth direction d4 being parallel to the first direction dl, the third row of first light sources 2a being positioned below the second row of first light sources 2, the fourth row of first light sources 2b being positioned below the third row of first light sources 2a.
[0046] The addition of the second row of first light sources 2, the third row of first light sources 2a and the fourth row of first light sources 2b makes it possible to obtain the most extensive and therefore the most complete lighting possible.
[0047] According to one example, the second row of first light sources 2, the third row of first light sources 2a and the fourth row of first light sources 2b are configured to form or participate in forming a complementary beam route.
[0048] This configuration allows for the most complete lighting function possible.
[0049] According to one example, the light sources of the first row 1 of first light sources, of the second row of first light sources 2, of the third row of first light sources 2a and of the fourth row of first light sources 2b are selectively activatable.
[0050] Thus, this configuration allows in particular to selectively configure with the same lighting module a lighting with a cut-off that can be on the right or on the left.
[0051] According to one example, the lighting module includes a projection lens 11 positioned on the optical axis 13 after the primary lens 5.
[0052] Combining a primary lens with a projection lens allows the desired light distribution to be obtained along a plane perpendicular to the optical axis while having sufficient light power and image quality.
[0053] According to one example, at least one of the input diopters of the projection lens 11 and the output diopters of the projection lens 11 has micrometer-sized reliefs on its surface. "Micrometer-sized reliefs" are understood to mean a surface finish, particularly on a diopter, that comprises a set of protruding elements with a depth of less than 600 pm.
[0054] Thus, the positioning of these reliefs allows the cutoff to be slightly blurred on the output diopter to obtain a regulatory gradient and the beam to be uniformed on the input diopter, thanks to the presence of asperities on the surface of the diopters, so as to create a diffusion of light rays.
[0055] In the features described herein, the terms relating to verticality, horizontality, or transverseity (or lateral direction), or their equivalents, are understood with respect to the position in which the lighting system is intended to be mounted in a vehicle. The terms "vertical" and "horizontal" are used in this description to designate directions, with the term "vertical" (which corresponds to the height of the systems) oriented perpendicular to the horizontal plane, and the term "horizontal" oriented parallel to the horizontal plane. These directions are to be considered under the operating conditions of the module in a vehicle. The use of these terms does not imply that slight variations around the vertical and horizontal directions are excluded from the invention.For example, an inclination of + or - 10° relative to these directions is considered here as a minor variation around the two preferred directions. With respect to the horizontal plane, the inclination is generally between -5° and +4°, and laterally between -6° and +7.5°.
[0056] In the context of this description, the adjectives "lower" and "higher" and their equivalents (under, below, on, above) are to be taken in relation to the vertical direction, that is to say the direction perpendicular to the direction dl and to the optical axis 9. In the same context, a higher element is located above (but not necessarily in contact, nor directly opposite) a lower element, along the vertical direction.
[0057] According to one embodiment, the lighting module comprises a first row 1 of first light sources, a set 4 of second light sources, an optical axis 13, and a primary lens 5. The first row 1 of first light sources comprises light sources arranged in a straight line along the first direction dl. The first plane pl is defined so as to contain the first direction dl and to be perpendicular to the optical axis 13.
[0058] The primary lens 5 comprises a first entrance diopter 5a, a second entrance diopter 5b, an exit diopter 12, a first reflecting surface 8, and a second reflecting surface 9. The first entrance diopter 5a is configured to transmit light rays from the first light sources in the first row 1. The exit diopter 12 is configured to be traversed by light rays from the first light sources in the first row 1 after passing through the first entrance diopter 5a. The second entrance diopter 5b is configured to be traversed by light rays from the second light sources in assembly 4 so that these rays are then reflected onto the first reflecting surface 8. The first reflecting surface 8 is configured so that the light rays from the second light sources in assembly 4 undergo a reflection, by total internal reflection linked to the angle of the rays impacting it, before undergoing reflection on the second reflection surface 9.
[0059] The second reflection surface 9 is configured so that the light rays from the second light sources of the assembly 4, after their reflection on the first reflection surface 8, undergo a further reflection and are directed towards the output diopter 12.
[0060] The first entrance diopter 5a comprises a first portion 5aa and a second portion 5ab. The first portion 5aa and the second portion 5ab are joined at a junction line 15. The first portion 5aa and the second portion 5ab do not have the same orientation with respect to the optical axis 13.
[0061] According to a preferred embodiment, the first portion 5aa is positioned relative to the second portion 5ab in the upper part of the first entrance diopter 5a. The first portion 5aa is positioned between the junction line 15 (in contact with it) and the exit diopter 12. The first portion 5aa may be in contact with the exit diopter 12.
[0062] Advantageously, the first portion 5aa is included in the second reflection surface 9.
[0063] Preferably, as illustrated in [Fig.2], the second reflecting surface 9 has a concave profile so as to direct light rays from the set of second light sources of the set 4 towards the output diopter 12. This allows in particular a convergence effect.
[0064] Advantageously, the second reflecting surface 9 and the second portion 5ab of the first entrance diopter 5a form an angle between 115° and 155°.
[0065] Preferably, the first row 1 of first light sources is located with respect to the first entrance diopter 5a so that between 50% and 70% of the light rays from the first row 1 of first light sources are directed towards the first portion 5aa.
[0066] Preferably, the junction line 15 is situated relative to the first row 1 of first light sources such that the junction line 15 divides the first row 1 of first light sources into an upper and a lower part. The upper part is between 0% and 20% larger than the lower part.
[0067] According to an advantageous embodiment, the lighting module includes a third reflecting surface 14. The third reflecting surface 14 is configured such that light rays from the set of light sources 4 are reflected onto the third reflecting surface 14 after their reflection by the first reflecting surface 8 and before their reflection by the second reflecting surface 9.
[0068] Preferably, the third reflecting surface 14 and the second portion 5ab of the first entrance diopter 5a are located on the same preferably planar surface. The third reflecting surface 14 is formed by a portion of the second portion 5ab of the first entrance diopter 5a.
[0069] Advantageously, the second portion 5ab of the first entrance diopter 5a is oriented with respect to the first plane pl so as to form an angle with the first plane pl between 0 and 10°. Alternatively, the second portion 5ab of the first entrance diopter 5a is oriented (with respect to the first plane pl) so that the angle between the second portion 5ab and the first reflecting surface 8 decreases.
[0070] According to a preferred embodiment, the exit diopter 12 comprises an upper portion 6 and a lower portion 7. The upper portion 6 has an upper curvature 6a. The lower portion 7 has a lower curvature 7a. The upper curvature 6a is more inward than the lower curvature 7a. In the case where the upper curvature 6a and the lower curvature 7a each define an arc of a circle, the upper curvature 6a has a radius at least 30% smaller than the radius of the lower curvature 7a.
[0071] Preferably, the lighting module comprises collimators 10. Each collimator 10 of the lighting module is associated with a second separate light source 4. Each collimator 10 then receives light from said source and sends it in a collimated manner to the second input diopter 5.
[0072] Preferably, the first row 1 of first light sources is configured to form a cutoff beam of a dipped beam.
[0073] Advantageously, the set of second light sources of set 4 is configured to form a low beam near field.
[0074] The beam from the set 4 of second light sources can also be called a "fiat" beam, for flat or spread beam. It is projected overall below the cutoff and serves to illuminate the near field in front of the vehicle. The beam from the first row 1 of first light sources defines a cutoff zone. Thus, the combination of the near-field beam and the beam from the first row 1 of first light sources defines, at least partially, a low-beam headlight beam.
[0075] The beam from the first row 1 of first light sources is therefore configured to produce, in dipped beam mode, a portion of the dipped beam with a cutoff. The resulting angled portion is called the "kink" of the "dipped beam".
[0076] Dipped beam type beams typically have a first lateral zone (normally on the edge of the road) projecting at a slightly higher height than in a second lateral zone (normally on the middle of the road), these two zones following each other laterally with the presence of a bend or curve between them. they.
[0077] A near-field beam of a dipped headlight is typically a relatively spread projection laterally to the front of the vehicle, mostly or totally below the horizon line, generally seeking a good distribution of illumination over the entire illuminated area.
[0078] The first row 1 of first light sources can be spaced from the primary lens 5 by a distance of 0.7 mm.
[0079] This distance is chosen according to the thermal resistance of the material of the primary lens 5 which is selected so as to minimize as much as possible the distance between the light sources and the primary lens 5, in order to collect the maximum amount of light and thus maximize efficiency.
[0080] The first input diopter 5a can be located more than 33 mm from the output diopter 12. This distance is taken into account at the optical axis 13.
[0081] According to a preferred example, the lighting module comprises a second row of first light sources 2, comprising light sources arranged in a straight line along a second direction d2. The second direction d2 is parallel to the first direction dl. The second row of first light sources 2 is positioned below the first row 1 of first light sources.
[0082] Advantageously, the lighting module includes a third row of first light sources 2a comprising light sources arranged in a straight line along the third direction d3. Advantageously, the lighting module includes a fourth row of first light sources 2b comprising light sources arranged in a straight line along a fourth direction d4. The third direction d3 and the fourth direction d4 are parallel to the first direction d1. The third row of first light sources 2a is positioned below the second row of first light sources 2. The fourth row of first light sources 2b is positioned below the third row of first light sources 2a.
[0083] The first row 1 of first light sources, the second row of first light sources 2, the third row of first light sources 2a, and the fourth row of first light sources 2b can be fixed to a first support. The set 4 of second light sources can be fixed to a second support. These supports can be made of Printed Circuit Board (PCB). The rows can be fixed to these supports by gluing or by another type of fastening, for example, by clips.
[0084] Preferably, the second row of first light sources 2, the third row of first light sources 2a and the fourth row of first light sources 2b are configured to form or participate in forming a complementary beam route. The light sources of rows 2, 2a and 2b enter the primary lens through the second portion of the first entrance diopter.
[0085] The invention can contribute to a high beam function designed to illuminate the scene in front of the vehicle over a wide area, as well as over a considerable distance, typically around two hundred meters. This light beam, by virtue of its lighting function, is located primarily above the horizon line. It may, for example, have a slightly upward optical axis of illumination. In particular, it can be used to generate a "complementary" type lighting function that forms a portion of a high beam complementary to that produced by a near-field beam. The supplementary high beam aims, in whole or at least primarily, to illuminate above the horizon line, while the near-field beam (which may have the characteristics of a low beam) aims to illuminate, in whole or at least primarily, below the horizon line.The road supplement can therefore be a main part of the overall "road" wiring harness and be associated with another harness participating in the code.
[0086] The module can also be used to create other lighting functions via or in addition to those described above, in relation to adaptive beams. A lighting matrix can thus be created to selectively illuminate parts of the space in front of the vehicle.
[0087] Advantageously, the light sources in the first row 1 of first light sources, the second row of first light sources 2, the third row of first light sources 2a, and the fourth row of first light sources 2b are, all or only some, selectively activatable, thus creating a pixelated light source. This configuration allows the brightness level to be controlled according to the area considered. The acronym ADB (for Adaptive Driving Beam) is used for this type of function.
[0088] Indeed, selective activation of light sources makes it possible to obtain various light beam configurations that can adapt to different situations. Thus, areas that need to be illuminated are illuminated, and those whose brightness must be reduced due to regulatory constraints will also be illuminated.
[0089] This discretization of light is also referred to as a segmented beam. Thus, a segmented beam is a beam whose projection forms an image composed of beam segments, each segment being able to be illuminated independently.
[0090] Thus, not all emitting elements are necessarily simultaneously active, that is, emitting light. This function allows the shape of the rendered beam to be modulated. In the case where a light source is not activated, its image, such as The light projected by the optical module will be zero. It then forms a gap in the resulting overall beam. This gap is understood to be limited to coupling phenomena at the source and the effects of stray light from the optics.
[0091] The system according to the invention may include a control unit for the activation of each of the sources, configured to produce at least one dark zone forming a tunnel in a beam projected by deactivating a group of adjacent sources, the control unit being configured to determine the number of sources in the group corresponding to the dark zone as a function of the width dimension of the sources.
[0092] The control unit may include a computer program product, preferably stored in non-transient memory, in which the computer program product includes instructions which, when executed by a processor, make it possible to determine the sources to be activated, in particular to obtain at least one dark area (in which the sources are not activated) of a determined surface taking into account the variable surface of the images of the elements.
[0093] The light sources in rows of light sources 1, 2, 2a and 2b can each be composed of 24 light sources. The light sources in set 4 of second light sources can number 8.
[0094] The light sources of the set 4 of second light sources can be aligned in a direction parallel to the direction dl.
[0095] The light sources of the entire device can be light-emitting diodes, also commonly called LEDs.
[0096] Advantageously, the LEDs in the entire lighting module have an emitting surface area of 0.5 mm² or 1 mm². The LEDs can have a height of 0.74 mm and a width of 1 mm. The size of the LEDs is directly related to the desired beam volume. Furthermore, to obtain a large beam volume, it is also possible to add rows of LEDs.
[0097] Two consecutive light sources from the first row 1 of first light sources, from the second row of first light sources 2, from the third row of first light sources 2a and from the fourth row of first light sources 2b can be at a distance of 0.025mm.
[0098] The rows of light sources 1, 2, 2a and 2b can be spaced 1.025 mm apart.
[0099] The rows of light sources 1, 2, 2a and 2b can be spaced from the set 4 of second light sources by a distance of between 10 mm and 30 mm.
[0100] The set 4 of second light sources can be positioned at a distance of 1 mm from the first reflecting surface 8.
[0101] According to a preferred embodiment, the lighting module includes a projection lens 11 positioned on the optical axis 13 after the primary lens 5.
[0102] The distance between the input diopter and the output diopter of the projection lens 11 can be 32 mm.
[0103] The distance between the primary lens 5 and the projection lens 11 can be 6.8 mm.
[0104] Preferably, the primary lens 5 and the projection lens 11 are made of PMMA (polymethyl methacrylate), silicone, glass, or PC (polycarbonate), which offers better thermal resistance than PMMA. The system comprising the primary lens 5 and the projection lens 11 can have a focal length of 42.5 mm. The field of view of the beam from the second light sources exiting the projection lens 11 can be 35°.
[0105] Advantageously, the primary lens 5 and the projection lens 11 have a size of 30 by 60 mm (taking into account the fixing areas).
[0106] According to an advantageous embodiment, the optical axis 13 and the first direction dl are orthogonal.
[0107] According to a preferred example, at least one of the input diopter of the projection lens 11 and the output diopter of the projection lens 11 has a protruding microstructure on its surface. This microstructure may protrude to a depth of less than 50 pm for the output diopter and to a depth of less than 600 pm for the input diopter. This microstructure may have concentric patterns. The patterns may be striations or dots.
[0108] Several lighting modules according to the invention can be arranged in a housing closed by a glass panel so as to obtain one or more beams of light and / or signaling at the output of the projector. A projector can also be complex and combine several modules which may, in addition, optionally share components.
[0109] The invention is not limited to the embodiments previously described and extends to all embodiments covered by the invention.
[0110] Reference lists: 1. First row of first light sources 2. Second row of first light sources 2a. Third row of first light sources 2b. Fourth row of first light sources 4. Set of second light sources 5. Primary lens 5a. First entrance diopter 5aa. first portion 5ab. second portion 5b. Second entrance diopter 6. upper part 6a. upper curvature 7. lower part 7a. lower curvature 8. First reflective surface 9. Second reflective surface 10. collimators 11. Projection lens 12. Exit diopter 13. Optical axis 14. Third reflective surface 15. Junction line dl. first direction d2. Second direction d3. third direction d4. fourth direction pl. foreground
Claims
1. Demands Lighting module including: - a first row (1) of first light sources comprising light sources aligned along a first direction (dl), - a set (4) of second light sources, - an optical axis (13), a first plane (pl) being defined so as to contain the first direction (dl) and to be perpendicular to the optical axis (13), - a primary lens (5) comprising a first input diopter (5a) and an output diopter (12), the first input diopter (5a) being configured to receive light rays from the first light sources of the first row (1), the output diopter (12) being configured to transmit light rays from the first light sources of the first row (1) and received by the first input diopter (5a), the primary lens (5) further comprising: - a second input diopter (5b), a first reflection surface (8) and a second reflection surface (9), the second input diopter (5b) being configured to receive light rays from the second light sources of the assembly (4) and to transmit them to the first reflection surface (8), the first reflection surface (8) being configured to reflect, towards the second reflection surface (9), light rays from the second light sources of the assembly (4), the second reflecting surface (9) being configured to reflect, towards the output diopter (12), the light rays from the second light sources of the assembly (4) after their reflection on the first reflecting surface (8), the first entrance diopter (5a) comprising a first portion (5aa) and a second portion (5ab) joined by a junction line (15), the first portion (5aa) and the second portion (5ab) being inclined differently with respect to the optical axis (13), characterized in that the lighting module comprises a second row of first light sources (2) comprising light sources aligned along a second direction (d2), the second direction (d2) being parallel to the first direction (dl), the second row of first light sources (2) being positioned below the first row (1) of first light sources.
2. Lighting module according to the preceding claim in which the first portion (5aa) is positioned at the upper end of the first input diopter (5a), the first portion (5aa) extending from the junction line (15) to the output diopter (12).
3. Lighting module according to any one of the preceding claims wherein the first portion (5aa) is part of the second reflecting surface (9).
4. Lighting module according to any one of the preceding claims in which the second reflecting surface (9) forms with the second portion (5ab) of the first input diopter (5a) an angle between 115° and 155°.
5. Lighting module according to any one of the preceding claims wherein the first row (1) of first light sources is positioned in a direction transverse to the first direction (dl) such that between 50% and 70% of the light rays from the first row (1) of first light sources are refracted by the first portion (5aa).
6. Lighting module according to any one of the preceding claims wherein the junction line (15) projects onto the first row (1) of first light sources in a direction parallel to the optical axis (13) so as to divide the first row (1) of first light sources into an upper part and a lower part, the upper part being between 0% and 20% larger than the lower part.
7. Lighting module according to any one of the preceding claims wherein the second portion (5ab) of the first input diopter (5a) is inclined with respect to the first plane (pl) at an angle between 0 and 10° such that the angle between said second portion (5ab) and the first reflecting surface (8) decreases.
8. Lighting module according to any one of the preceding claims comprising collimators (10), each collimator (10) being associated with a second separate light source (4), each collimator (10) receiving light from said source and sending it in a collimated manner to the second input diopter (5b).
9. Lighting module according to any one of the preceding claims in which the first row (1) of first light sources is configured to form a beam at the cutoff of a dipped headlight.
10. Lighting module according to any one of the preceding claims wherein the set (4) of second light sources is configured to form a low beam near field.
11. Lighting module according to any one of the preceding claims comprising a third row of first light sources (2a) comprising light sources aligned along a third direction (d3) and a fourth row of first light sources (2b) comprising light sources aligned along a fourth direction (d4), the third direction (d3) and the fourth direction (d4) being parallel to the first direction (d1), the third row of first light sources (2a) being positioned below the second row of first light sources (2), the fourth row of first light sources (2b) being positioned below the third row of first light sources (2a).
12. Lighting module according to the preceding claim wherein the second row of first light sources (2), the third row of first light sources (2a) and the fourth row of first light sources (2b) are configured to form or participate in forming a complementary beam route.
13. Lighting module according to any one of the preceding claims comprising a projection lens (11) positioned on the optical axis (13) after the primary lens (5).