FR3141749A1 - Lighting device - Google Patents

Abstract

Title: Lighting device The invention relates to a lighting device comprising: a first row of light sources (2) and a second row of light sources (3) each comprising light sources aligned in a first direction (d) and a lens (4), in which the first row of light sources and the second row of light sources are respectively configured to produce a first light beam (5) and a second light beam (6) which participate in forming a low beam beam. The light sources of the first row of light sources and the second row of light sources have a maximized emissive part, the first row of light sources and the second row of light sources are arranged edge to edge in the first direction and the lens receives light rays coming from the first row of light sources and the second row of light sources. Figure for abstract: Fig. 3

Description

Lighting device

The present invention relates to the field of lighting and/or signaling and the organs, in particular optical organs, which participate therein. It finds a particularly advantageous application in the field of motor vehicles. In particular, it relates to a lighting device.

STATE OF THE ART

In the automotive sector, we know of devices capable of emitting light beams, also called lighting and/or signaling functions.

These devices must meet current regulations by emitting light in the desired locations while limiting brightness in certain areas. As an illustration of the need to develop high-quality devices to meet these objectives, the schematizes the isocandela curves of the luminous intensity from a cut-off beam with a cut-off zone on the left. In this figure, a lack of light, impeding visibility and therefore road safety, can be observed on the left of the cut-off beam. Although the only schematizes a cut-off beam, the lack of light observed in this figure is also present when a full dipped beam, that is to say when a near-field beam associated with a cut-off beam is combined with a high beam.

One of the constraints that manufacturers are also faced with is reducing the size of the device, in order to achieve a device that is as easy to use as possible.

In order to best achieve these different objectives, a solution was proposed in document FR3077362 A1. This solution is based on the development of a projector equipped with three beams, to form a dipped beam associated with a main beam supplement to obtain a desired light distribution. The particularity of this solution lies in the fact that the near-field beam of the dipped beam passes through a waveguide in which it undergoes several internal reflections to direct the light beam to the desired positions.

However, this type of solution has drawbacks, particularly with regard to the precision of the spatial distribution of the brightness coming from the different beams and also with regard to the complexity of the device used.

An object of the present invention is therefore to propose a device making it possible to overcome the drawbacks mentioned.

Other objects, features and advantages of the present invention will become apparent from the following description and accompanying drawings. It is understood that other advantages may be incorporated.

SUMMARY

• une première rangée de sources lumineuses comprenant des sources lumineuses alignées selon une première direction,
• une deuxième rangée de sources lumineuses comprenant des sources lumineuses alignées selon la première direction,
• une lentille,

dans lequel la première rangée de sources lumineuses est configurée pour produire un premier faisceau lumineux, la deuxième rangée de sources lumineuses est configurée pour produire un deuxième faisceau lumineux et le premier faisceau lumineux et le deuxième faisceau lumineux participent à former un faisceau de feu de croisement caractérisé en ce que les sources lumineuses de la première rangée de sources lumineuses sont à partie émissive maximisée, les sources lumineuses de la deuxième rangée de sources lumineuses sont à partie émissive maximisée, en ce que la première rangée de sources lumineuses et la deuxième rangée de sources lumineuses sont disposées bord à bord selon la première direction et en ce que la lentille reçoit des rayons lumineux issus de la première rangée de sources lumineuses et de la deuxième rangée de sources lumineuses.To achieve this objective, according to one embodiment, a lighting device is provided comprising:

• a first row of light sources comprising light sources aligned in a first direction,
• a second row of light sources comprising light sources aligned in the first direction,
• a lens,

wherein the first row of light sources is configured to produce a first light beam, the second row of light sources is configured to produce a second light beam and the first light beam and the second light beam participate in forming a dipped beam characterized in that the light sources of the first row of light sources are with maximized emissive part, the light sources of the second row of light sources are with maximized emissive part, in that the first row of light sources and the second row of light sources are arranged edge to edge in the first direction and in that the lens receives light rays from the first row of light sources and the second row of light sources.

Thus, since the light sources of the first row of light sources and those of the second row of light sources have a maximized emissive part, since the first row of light sources and the second row of light sources are adjacent in the first direction and since the lens is common to the first row of light sources and the second row of light sources, the lighting device allows a juxtaposition between the beam of the first row of light sources and the beam of the second row of light sources. More precisely, due to the positioning of the light sources relative to each other and relative to the lens, the spatial resolution obtained is better. Indeed, there is a minimal space between the different light sources, which leads to a better distribution of the brightness.

So, as we can see in , where the isocandela curves of the luminous intensity from a cut-off beam with a cut-off zone on the left associated with a near-field beam of a dipped beam are schematized, due to the positioning relative to each other and relative to the lens of the light sources forming these beams, the distribution of the luminosity is optimized to fill the lack of light initially observed in . This is particularly true in the immediate vicinity of the cut-off beam, due to the proximity of the two rows of sources; this reinforces the illumination in this area and avoids darker areas at this level.

Furthermore, the lighting device makes it possible to obtain the desired brightness distribution while simplifying the device as much as possible by reducing the number and size of the elements used (optical components and light sources).

Another aspect concerns a system comprising at least one lighting device.

Another aspect relates to a system comprising at least one lighting device and comprising a secondary device configured to produce an additional near-field beam participating in forming a dipped beam.

Thus, in this way, the system is a complete system that can thus produce a wider dipped beam. Indeed, the additional near-field beam has a wider illumination surface in width and height than the illumination surface from the first light beam.

Another aspect relates to a system comprising a first lighting device and a second lighting device and in which the first lighting device is configured such that its second light beam covers a first area not illuminated by the second light beam of the second lighting device and an area common to the second light beam of the second lighting device, and/or the second lighting device is configured such that its second light beam covers the common area and a second area not illuminated by the second light beam of the first lighting device.

Thus, by this configuration, the system comprises two lighting devices and thus defines a system that can equip the right side and the left side of the front of a vehicle. The system is defined so as to illuminate an area having a significant width at the front of the vehicle.

Another aspect also concerns a vehicle equipped with at least one lighting device.

BRIEF DESCRIPTION OF THE FIGURES

The aims, objects, as well as the features and advantages of the invention will become more apparent from the detailed description of one embodiment thereof which is illustrated by the following accompanying drawings in which:

There represents the isocandela curves of the luminous intensity from a cut-off beam with a cut-off region on the left where a lack of light can be observed on the left of the cut-off beam.

There represents the isocandela curves of the luminous intensity from a cut-off beam with a cut-off zone on the left associated with a near-field beam of a dipped beam obtained by the lighting device according to one embodiment of the invention.

There represents the lighting device according to an embodiment where the positioning of the first row of light sources, the positioning of the second row of light sources and the positioning of the third row of light sources between them and relative to the lens can be observed.

There depicts the system according to an embodiment where the illumination device and the secondary illumination device configured to produce an additional near-field beam as well as the illuminated areas can be observed.

The drawings are given as examples and are not limiting of the invention. They constitute schematic representations of principle intended to facilitate the understanding of the invention and are not necessarily to the scale of practical applications.

DETAILED DESCRIPTION

Before commencing a detailed review of embodiments of the invention, optional features are set forth below which may optionally be used in combination or alternatively.

According to one example, the second light beam 6 is a light beam having an angled portion configured to form a cut-off dipped beam portion.

Thus, the bent portion of the second light beam 6 makes it possible to suppress the lighting on the right side for left-hand driving or on the left side for right-hand driving. Thus, this configuration makes it possible not to dazzle cars located on the opposite lane.

According to one example, the light sources of the second row of light sources 3 are selectively activatable.

Thus, the positioning of the light sources of the second row of light sources 3 which can be switched on individually makes it possible to control the brightness value according to the area considered.

In fact, selective activation of light sources makes it possible to obtain varied light beam configurations that can be adapted to various situations. Thus, the areas that need to be lit are lit and those whose brightness must be reduced due to regulatory constraints will also be lit.

According to one example, the first light beam 5 is configured to form a near-field beam of a dipped beam headlight.

According to one example, the light sources of the first row of light sources 2 are selectively activatable.

Similarly, selective activation of light sources allows for varied light beam configurations to be obtained to adapt to various situations.

According to one example, the lighting device 1 comprises a third row of light sources 7, the third row of light sources 7 is configured to produce a third light beam 8 which forms or participates in forming a main supplementary beam.

According to one example, the light sources of the third row of light sources 7 have a maximized emissive part.

Thus, in this way, in the case where several electroluminescent sources are implemented, the spatial resolution between these different sources is better. Indeed, there is a minimal space between the different light sources.

According to one example, the third row of light sources 7 is positioned such that light rays from the third row of light sources 7 propagate through the lens 4.

Thus, in this way, the lighting device 1 is configured so that it is as compact as possible. Indeed, the lens 4 is sufficient for all the rows of light sources of the lighting device 1.

According to one example, the first unlit area 11 is located at a first lateral end 14 of the second light beam 6 of the first lighting device 1 and the second unlit area 13 is located at a second lateral end 15 of the second light beam 6 of the second lighting device 1, the second lateral end 15 being opposite the first lateral end 14.

Thus, thanks to this configuration, the combination of two lighting devices 1 can illuminate a large area at the front of the vehicle.

It is specified that in the context of the present invention, the term “angled portion” means that the portion comprises two parts linked together in such a way that between these two parts an angle of between 75° and 105° (and in particular equal to 90°) is formed.

In the characteristics set out below, the terms relating to verticality, horizontality or transversality (or lateral direction), or their equivalents, are understood in relation to the position in which the lighting system is intended to be mounted in a vehicle. The terms “vertical” and “horizontal” are used in the present description to designate directions, following an orientation perpendicular to the plane of the horizon for the term “vertical” (which corresponds to the height of the systems), and following an orientation parallel to the plane of the horizon for the term “horizontal”. They are to be considered in the operating conditions of the device in a vehicle. The use of these words does not mean that slight variations around the vertical and horizontal directions are excluded from the invention. For example, an inclination relative to these directions of the order of + or – 10° is here considered as a minor variation around the two preferred directions. In relation to the horizontal plane, the inclination is in principle between -5° and +4° and it is between -6° and +7.5° laterally. Furthermore, the adjectives "lower" and "higher" are to be taken in relation to the vertical direction; in the same context, a higher element will be located above (but not necessarily in contact, nor directly to the right) of a lower element, following the vertical direction.

The horizon plane can be represented by a median plane positioned between the second light beam 6 and the third light beam 8.

The invention is not limited to the embodiments previously described and extends to all embodiments covered by the claims.

According to one embodiment, the lighting device 1 comprises a first row of light sources 2, a second row of light sources 3 and a lens 4. The first row of light sources 2 and the second row of light sources 3 comprise light sources arranged in a straight line in the first direction d.

The first row of light sources 2 is configured to form a first light beam 5. The second row of light sources 3 is configured to form a second light beam 6. The first light beam 5 and the second light beam 6 participate in producing a dipped beam.

The first light beam 5 may be a “flat” beam for flat or spread beam. It is projected globally under the cut-off and is used to illuminate the near field at the front of the vehicle. The second light beam 6 may make it possible to define a cut-off zone. Thus, the combination of the first light beam 5 and second light beam 6 makes it possible to at least partially define a dipped beam. Thanks to the first light beam 5, the light intensity of the dipped beam type beam obtained from this simultaneous projection is reinforced.

The light sources of the first row of light sources 2 have a maximized emissive portion. The light sources of the second row of light sources 3 have a maximized emissive portion. The first row of light sources 2 is positioned in contact with the second row of light sources 3 in the first direction d. These rows are preferably arranged on the same printed circuit board support.

Thus, the smallest distance between the center of a light source of the first row of light sources 2 and the center of a light source of the second row of light sources 3 may be less than 1 mm, and for example equal to 0.77 mm.

The light sources of the first row of light sources 2 and the light sources of the second row of light sources 3 are arranged in a straight line along the first direction d. The lens 4 is traversed by light rays from the first row of light sources 2 and from the second row of light sources 3.

A maximized emissive part may be an emissive part exposed to the surface of the source, in the sense that it is not coated with any optically active portion (in particular absence of lenses or filters) or photonically active portion (in particular absence of light re-emission layers, for example by luminescence in particular by luminescent particles).

The emissive part may be exposed to the terminal face of the source and occupies at least 90% of the surface of said terminal face, preferably 98% and even more preferably 100% of the surface. In the latter case, the emissive part then forms the light exit face of the source.

In particular, these sources may be equipped with at least one chip using semiconductor technology and capable of emitting light. Furthermore, the term light source here means a set of at least one elementary source capable of producing a flux leading to generating at least one light beam at the output of the device of the invention.

Thus, we take advantage of this type of light source so as to arrange these sources very close to each other (typically with a space of less than 50 microns, or even less than 25 microns). It is possible to image directly at the level of these sources; however, the efficiency of the optical device is maintained and we operate a shaping, in particular vertical, of the pixels, by means of the primary optical element which is an element common to the sources.

The source may be laterally delimited by several circumferential walls extending along the growth axis of the diode and by an end face. The end face, in this case, comprises an emissive portion through which light is emitted when the diode is subjected to polarization.

The emissive part can be either a layer, which can be called an active layer, in which the generation of photons takes place by electron-hole recombinations, or, which is more common in particular for white light, a conversion layer provided with charges, such as phosphorus particles, allowing the re-emission of photons produced in the active layer in a wavelength band adapted to the application.

In an advantageous embodiment, the terminal face of the source has a rectangular cross-section, which is typical for LED chips. Thus, the emissive part also has a rectangular cross-section whose size is slightly smaller than that of the output face. In particular, the length of one of the sides of the emissive part is less than the length of one of the sides of the terminal face of the source by a value between 10 micrometers and 40 micrometers. In other words, the distance between an edge of the terminal face and an edge of the emissive part can be between 5 micrometers and 20 micrometers.

In the case of individually packaged light-emitting sources, also called LED chips, the maximized size of the emissive portion results in a reduction in the size of the package surrounding the light-emitting diode. Indeed, the package may include edges that cover the circumferential walls of the diode. By having the emissive portion occupying almost the entirety, or even the entirety, of the end face of the diode, these edges can be configured so that they have a very small thickness, for example of the order of a few micrometers. Thus, the package surrounding the light-emitting diode is almost the same size as this diode. The size of the package only protrudes a few micrometers from the end face of the diode.

In particular, we can use such sources marketed under the brand name Luxeon NEO Exact® by the company Lumileds®.

Another example of light sources with maximized emissive part: the light sources comprise at least two rows of sources on a common substrate. This arrangement of elements can be the result of growth on the substrate from which they have grown respectively, or of any other method of realization, for example by transfer of the elements by transfer techniques. Different arrangements of electroluminescent elements can meet this definition of monolithic matrix, since the electroluminescent elements have one of their main dimensions of elongation substantially perpendicular to a common substrate and that the transverse spacing between the pixels, formed by one or more electroluminescent elements grouped together electrically, is small in comparison with the spacings imposed in known arrangements of generally flat square chips soldered on a printed circuit board.

In other words, in the invention, it may be a monolithic electroluminescent source which is divided into several individual segments. The individual segments are separated by a thin wall, made for example of silicone. The thickness of this thin wall is between 10 micrometers and 25 micrometers. It is possible in particular to use such sources marketed under the brand name PixCell® by the company Samsung®.

The first row of light sources 2 and the second row of light sources 3 can be positioned relative to the lens 4 such that the distance between the LEDs of these rows and the entrance surface of the lens 4 (at the optical axis of the lens) is between 0.25 mm and 1 mm.

The rows of light sources can be positioned perpendicular to the optical axis of the lens. The rows of light sources can be positioned symmetrically about the optical axis so that there are an equal number of light sources on each side of the optical axis.

This distance is chosen according to the thermal resistance of the material of the lens 4 which is selected so as to minimize as much as possible the distance between the rows of light sources and the first lens 4, in order to collect the maximum amount of light and therefore maximize efficiency.

Preferably, the lens 4 is made of PMMA (polymethyl methacrylate), silicon, glass or PC (polycarbonate) which allows better thermal resistance than PPMA. Advantageously, the lens 4 has a size of 30 by 45 mm (taking into account the fixing zones). Preferably, the lens 4 has a thickness of between 2.5 mm and 6 mm so as to obtain a single-injection lens.

According to a preferred embodiment, the second light beam 6 is a light beam having a portion comprising two parts having an angle of between 75° and 105° (and in particular equal to 90°). This light beam is therefore configured to produce, in low beam mode, a portion of a dipped beam with cut-off. The bent portion is called the “kink” (in English) of the “low beam”.

Dipped beam type beams typically have a first lateral zone (normally on the edge of the road) projecting at a height slightly higher 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 elbow between them.

Advantageously, the light sources of the second row of light sources 3 are individually switchable. The acronym ADB (for Adaptive Driving Beam) is used for this type of function.

According to one example, the lighting device 1 may comprise control means for selectively activating the light sources of the first row of light sources 2 and of the second row of light sources.

Preferably, the first light beam 5 is configured to produce a near-field beam of a dipped beam.

A near-field beam from a dipped beam is typically a relatively spread projection laterally in front of the vehicle, mostly or completely below the horizon line, generally seeking a good distribution of illumination across the entire illuminated area.

In an advantageous embodiment, the light sources of the second row of light sources 3 can be switched on individually.

The light sources of the first row of light sources 2 and the second row of light sources 3 can be individually ignited, thereby creating a pixelated light source. 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 ignitable independently.

Thus, not all emissive elements are necessarily simultaneously active, i.e. emissive of light. This function allows the shape of the beam rendered to be modulated. In the case where a light source is not activated, its image, as projected by the optical device, will be zero. It then forms a lighting void in the resulting overall beam. This void is understood to include coupling phenomena at the source and the effects of parasitic light from the optics.

The sources are preferably part of a light generating system which preferably comprises a support, one face of which carries selectively activatable sources, based on semiconductor emissive element technology, including light-emitting diodes (LEDs).

The system according to the invention may comprise a unit for controlling the activation of each of the sources, configured to produce at least one dark zone forming a tunnel in a projected beam 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.

The control unit may comprise a computer program product, preferably stored in a non-transitory memory, in which the computer program product comprises 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 zone (in which the sources are not activated) of a determined surface taking into account the variable surface of the images of the elements.

According to a preferred embodiment, the third row of light sources 7 is configured to form a third light beam 8 which forms or participates in forming a complementary road beam.

The smallest distance between the center of a light source of the third row of light sources 7 and the center of a light source of the second row of light sources 3 may be 2.5 mm. The smallest distance between the edge of a light source of the third row of light sources 7 and the edge of a light source of the second row of light sources 3 may be 0.028 mm.

The invention can participate in a high beam function which has the function of illuminating the scene in front of the vehicle over a wide area, but also over a significant distance, typically around two hundred meters. This light beam, due to its lighting function, is located mainly above the horizon line. It can have a slightly ascending optical axis of illumination for example. In particular, it can be used to generate a lighting function of the “complementary” type which forms a portion of a high beam complementary to that produced by a near-field beam, the high beam complement seeking entirely or at least mainly to illuminate above the horizon line while the near-field beam (which can have the specificities of a dipped beam) seeks to illuminate entirely or at least mainly below the horizon line. The high beam complement can therefore be a main part of the overall “high beam” beam and be associated with another beam participating in the dipped beam.

The device can also be used to form other lighting functions via or outside those described above, in relation to the adaptive beams. It is thus possible to produce a lighting matrix for selectively illuminating parts of the space in front of the vehicle.

Preferably, the light sources of the third row of light sources 7 have a maximized emissive part.

In this way, the resulting beam can be discretized into independent parts.

Preferably, the third row of light sources 7 is positioned so that the light rays from the third row of light sources 7 pass through the lens 4.

This configuration allows for the most compact system possible.

Preferably, 12 light sources compose the first row of light sources 2. 18 light sources can compose the second row of light sources 3. 18 light sources can compose the third row of light sources 7.

Advantageously, the LEDs have an emissive surface of 0.5 mm by 0.5 mm.

Two consecutive light sources of the first row of light sources 2 may be at a distance of 0.025 mm. Two consecutive light sources of the second row of light sources 3 may be at a distance of 0.025 mm from each other.

Advantageously, the system 9 comprises at least one lighting device 1.

According to a preferred embodiment, the system 9 comprises at least one lighting device 1 and a secondary lighting device 10. The secondary lighting device 10 is configured to produce an additional near-field beam participating in producing a dipped beam.

Thus, in addition to the first light beam 5, the secondary lighting device 10 provides a relatively spread projection laterally and in height at the front of the vehicle.

Preferably, the system 9 comprises a first lighting device 1 and a second lighting device 1. The first lighting device 1 is configured such that its second light beam 6 is directed towards a first unlit area 11 and a common area 12. The first unlit area 11 is an area whose brightness is not due to the second light beam 6 of the second lighting device 1. The common area 12 is an area being illuminated by the second light beam 6 of the second lighting device 1 and also by the second light beam 6 of the first lighting device 1. Additionally or alternatively, the second lighting device 1 is configured such that its second light beam 6 is directed towards the common area 12 and towards a second unlit area 13. The second unlit area 13 is an area that cannot be illuminated by the second light beam 6 of the first lighting device 1 due to the configuration of the latter.

Advantageously, the first unlit zone 11 is positioned at a first lateral end 14 of the second light beam 6 of the first lighting device 1. The second unlit zone 13 is positioned at a second lateral end 15 of the second light beam 6 of the second lighting device 1. The second lateral end 15 is positioned opposite the first lateral end 14.

This configuration makes it possible to create zones of decreasing illumination at the first lateral end 14 and at the second lateral end 15. Indeed, the first unlit zone 11 and the second unlit zone 13 have a lower brightness than that of the common zone 12. In order to create these two zones of decreasing illumination, four LEDs can be positioned at one end of the second row of light sources of the first lighting device 1 and four LEDs can be positioned at the opposite end of the second row of light sources of the second lighting device 1. The first lighting device 1 and the second lighting device 1 are then offset so that only the common zone 12 results from common lighting between the first lighting device 1 and the second lighting device 1.

The first lighting device 1 and the second lighting device 1 can be arranged one on the right and the other on the left at the front of the vehicle so as to illuminate a large area in front of the vehicle.

Several lighting devices 1 may be arranged in a housing closed by a glass so as to obtain one or more lighting and/or signaling beams at the output of the projector. A projector may also be complex and associate several devices which may, in addition, possibly share components.

Reference lists:
Lighting device (1)
First row of light sources (2)
First direction (d)
Second row of light sources (3)
Lens (4)
First light beam (5)
Second light beam (6)
Third row of light sources (7)
Third light beam (8)
System (9)
Secondary lighting device (10)
First unlit area (11)
Common area (12)
Second unlit area (13)
First side end (14)
Second side end (15)

Claims (12)

Lighting device (1) comprising:

• a first row of light sources (2) comprising light sources aligned in a first direction (d),
• a second row of light sources (3) comprising light sources aligned in the first direction (d) and
• a lens (4),

wherein the first row of light sources (2) is configured to produce a first light beam (5), the second row of light sources (3) is configured to produce a second light beam (6) and the first light beam (5) and the second light beam (6) participate in forming a dipped beam, wherein the light sources of the first row of light sources (2) are with maximized emissive part, the light sources of the second row of light sources (3) are with maximized emissive part, in that the first row of light sources (2) and the second row of light sources (3) are arranged edge to edge in the first direction (d) and in that the lens (4) receives light rays from the first row of light sources (2) and the second row of light sources (3). Lighting device (1) according to the preceding claim, in which the second light beam (6) is a light beam having an angled portion configured to form a portion of a dipped beam with cut-off. Lighting device (1) according to any one of the preceding claims in which the light sources of the second row of light sources (3) are selectively activatable. Lighting device (1) according to any one of the preceding claims, wherein the first light beam (5) is configured to form a near-field beam of a dipped beam. Lighting device (1) according to any one of the preceding claims, in which the light sources of the first row of light sources (2) are selectively activatable. Lighting device (1) according to any one of the preceding claims comprising a third row of light sources (7), the third row of light sources (7) is configured to produce a third light beam (8) which forms or participates in forming a main beam supplement. Lighting device (1) according to the preceding claim, in which the light sources of the third row of light sources (7) have a maximized emissive part. A lighting device (1) according to any one of the two preceding claims wherein the third row of light sources (7) is positioned such that light rays from the third row of light sources (7) propagate through the lens (4). System (9) comprising at least one lighting device (1) according to any one of the preceding claims. System (9) according to the preceding claim comprising at least one lighting device (1) according to claim 4 alone or in combination with any one of claims 5 to 8, and comprising a secondary lighting device (10) configured to produce an additional near-field beam participating in forming a dipped beam. System (9) according to any one of claims 9 or 10 comprising a first lighting device (1) and a second lighting device (1) and wherein the first lighting device (1) is configured such that its second light beam (6) covers a first area (11) not illuminated by the second light beam (6) of the second lighting device (1) and a common area (12) with the second light beam (6) of the second lighting device (1), and/or the second lighting device (1) is configured such that its second light beam (6) covers the common area (12) and a second area (13) not illuminated by the second light beam (6) of the first lighting device (1). System (9) according to the preceding claim in which the first unlit area (11) is located at a first lateral end (14) of the second light beam (6) of the first lighting device (1) and the second unlit area (13) is located at a second lateral end (15) of the second light beam (6) of the second lighting device (1), the second lateral end (15) being opposite the first lateral end (14).