Light module with LED display optimised for automotive applications

Abstract

The invention relates to a light module for a motor vehicle, comprising an optical projection device (12) with a focus, an entrance face and an exit face; an imager (10) forming a matrix of light sources, arranged between the focus and the entrance face so that the optical projection device (12) can project an enlarged image from the imager (10); wherein the imager (10) has a width l and a height h, the entrance face and / or the exit face have a width L and a height H, where L>l, H>h, and L-l>H-h, so that the light module has a larger horizontal field of view than its vertical field of view when the light module is oriented in the mounting position on the motor vehicle.

Description

[0001] LIGHT MODULE WITH LED DISPLAY OPTIMIZED FOR AUTOMOTIVE APPLICATION

[0002] Technical field

[0003] The invention relates to the field of light signaling for motor vehicles.

[0004] Prior art

[0005] In the field of light signaling for motor vehicles, it is currently known to display light pictograms using various light imagers, such as liquid crystal screens requiring backlighting or optical microelectromechanical systems, commonly referred to as MEMS (acronym for "micro electro mechanic system"), also requiring a light source. These light imagers, potentially very efficient, are however expensive and oversized from a resolution point of view for the display of pictograms, usually of a simple and easily recognizable shape, on and in particular at the rear of a motor vehicle.

[0006] The published patent document FR 3 077 117 A1 relates to a light signaling module for a motor vehicle, comprising a liquid crystal imager.

[0007] The published patent document WO 2011 / 092121 A1 relates to a light signal module for a motor vehicle, comprising a surface light source of the OLED type (acronym for "organic light-emitting diode") and a projection lens. A pictogram display does not appear to be provided.

[0008] The published patent document FR 3 048 059 A1 relates to a light signaling module for a motor vehicle, comprising a matrix of light sources and a projection lens. A pictogram display does not appear to be provided.

[0009] Published patent document US 4,740,780 relates to a head-up display device, comprising a matrix-type light source, in this case a matrix of 64 by 64 light points of the light-emitting diode type, and a converging lens, the light matrix being arranged between the focus and the entrance face of the lens so as to project an enlarged image of the light matrix. This device is however specifically designed for a head-up display intended to be arranged in a dashboard in order to project light images towards the windshield.

[0010] Statement of the invention

[0011] The invention aims to overcome at least one of the problems of the aforementioned state of the art. More particularly, the invention aims to propose a light module for a motor vehicle, capable of projecting light images containing in particular pictograms and which is economical from the point of view of manufacturing cost and / or cost of use.

[0012] The invention relates to a light module for a motor vehicle, comprising an optical projection device with a focus, an input face and an output face; an imager forming a matrix of light sources, arranged between the focus and the input face so that the optical device can project an enlarged image of said imager; remarkable in that the imager has a width I and a height h, the input face and / or the output face have a width L and a height H, where L>l, H>h, and Ll>Hh, so that the light module has a horizontal field of view greater than a vertical field of view, when said light module is oriented in the mounting position on the motor vehicle.

[0013] An imager forming a matrix of light sources means a matrix of light sources whose light sources can be controlled individually or in groups, so as to selectively form different light images. The light sources may in particular be light-emitting diodes (LEDs), in particular of the "miniLED" type whose dimension is between 100 and 300 pm, or of the "MicroLED" type whose dimension is less than 100 pm. The light sources may be arranged on a printed circuit board (PCB) or of the monolithic type where the light sources are epitaxially grown on a substrate. The imager may also be a display, in particular of the "MicroLED" type on a semiconductor of the "CMOS" type, an acronym for "Complementary Metal Oxide Semiconductor".

[0014] The matrix of light sources comprises at least two rows and two columns. According to an advantageous embodiment of the invention, the rows are oriented in the direction of the width of the imager, and the columns are oriented in the direction of the height of the imager.

[0015] According to an advantageous embodiment of the invention, the matrix of light sources comprises a number of columns strictly greater than the number of rows. In other words, the matrix of light sources comprises more light sources in the width direction than in the height direction.

[0016] According to an advantageous embodiment of the invention, the matrix of light sources comprises at least 20 lines, in particular at least 50 lines.

[0017] According to an advantageous embodiment of the invention, the matrix of light sources comprises at least 50 columns, in particular at least 100 columns.

[0018] A high number of rows and / or columns helps improve the definition of the projected image.

[0019] According to an advantageous embodiment of the invention, the matrix of light sources comprises at most 200 lines.

[0020] According to an advantageous embodiment of the invention, the matrix of light sources comprises at most 400 columns.

[0021] Limiting the number of rows and / or columns helps keep the cost of the device reasonable.

[0022] Field of view means a field in which the imager's image can be observed by an observer located on the projection side.

[0023] According to an advantageous embodiment of the invention, Ll>n (Hh), where n=2, preferably n=3, more preferably n=5.

[0024] According to an advantageous embodiment of the invention, the imager comprises a center in a vertical direction and the optical projection device comprises an optical axis, said center being offset vertically, preferably downwards, relative to said optical axis, when the light module is oriented in the mounting position. The focus of the projection device is located on said optical axis.

[0025] According to an advantageous embodiment of the invention, the optical projection device comprises a single optical axis. The optical projection device thus differs from a matrix of optical projection devices which would have several optical axes, each linked to one of the optical projection devices of the matrix.

[0026] According to an advantageous embodiment of the invention, the distance between the edges of two adjacent light sources is greater than or equal to half the dimension of each of said adjacent light sources. By dimension, we mean the greatest length that can be measured on the emitting surface of the light source.

[0027] According to an advantageous embodiment of the invention, the distance between the edges of two adjacent light sources is between one and ten times the dimension of each of said adjacent light sources.

[0028] According to an advantageous embodiment of the invention, each source is square or rectangular in shape.

[0029] According to an advantageous embodiment of the invention, each source is circular in shape.

[0030] According to an advantageous embodiment of the invention, the fill factor is less than or equal to 50%, in particular less than or equal to 25%. By fill factor is understood the ratio between on the one hand the sum of the surfaces of the light sources of the matrix of light sources, and on the other hand the total surface of the substrate or support carrying the light sources. A reduced ratio makes it possible to limit the cost of the device.

[0031] According to an advantageous embodiment of the invention, the fill factor is greater than or equal to 1%. This value ensures sufficient overall brightness of the matrix of light sources.

[0032] According to an advantageous embodiment of the invention, the light rays from the light sources of the matrix of light sources directly impact the optical projection device. No intermediate optical element is arranged between the matrix of light sources and the optical projection device.

[0033] According to an advantageous embodiment of the invention, a projection of the imager onto the input face, along an optical axis of the projection device, is completely included in said input face, when the light module is oriented in the mounting position. According to an advantageous embodiment of the invention, the imager is arranged between the focus and the input face so as to obtain a magnification ratio of the projected image of between 1.5 and 2.5.

[0034] According to an advantageous embodiment of the invention, the optical projection device has a horizontal optical power Ph and a vertical optical power Pv, where Ph <Pv, lorsque le module lumineux est orienté dans la position de montage.

[0035] Optical power means the vergence of the optical projection device, corresponding to the inverse of the focal length.

[0036] According to an advantageous embodiment of the invention, the optical projection device has a horizontal magnification Gh and a vertical magnification Gv, where Gh Gv, preferably Gh <Gv, lorsque le module lumineux est orienté dans la position de montage.

[0037] Magnification is the ratio of the size of an object to its image through the optical projection device, the size being considered perpendicular to the optical axis of the optical projection device. For example, if the image is twice as large as the object, the magnification is two.

[0038] According to an advantageous embodiment of the invention, the optical projection device is a lens, preferably comprising an anti-reflection treatment on the input face and / or on the output face.

[0039] According to an advantageous embodiment of the invention, the optical projection device comprises several lenses arranged one behind the other in the direction of travel of the light, in particular comprises one or more doublets. This makes it possible to correct the aberrations present with a single lens.

[0040] According to an advantageous embodiment of the invention, the lens extends horizontally over at least 80% of the width L with a constant cross-section.

[0041] The invention also relates to a lighting device comprising a housing, a glass for closing the housing, and a lighting module housed in the housing, in which the lighting module is according to the invention, the optical projection device being a lens formed directly on an inner face of the closing glass. The measures of the invention are advantageous in that they make it possible to enlarge the imager while optimizing the luminance in the horizontal and vertical fields of view required for a light signaling device on a motor vehicle.

[0042] Brief description of the drawings

[0043] [Fig 1] is a top view of a motor vehicle, illustrating the horizontal field of view that a rear light must provide;

[0044] [Fig 2] is a side view of a motor vehicle, illustrating the vertical field of view that the rear lamp must provide;

[0045] [Fig 3] is a schematic side representation of a light module according to a first embodiment of the invention.

[0046] [Fig 4] is a rear view of the imager and light module lens of Figure 3.

[0047] [Fig 5] is a side schematic representation of two variants of the light module of Figure 3, corresponding to different magnification rates.

[0048] [Fig 6] is a side schematic representation of another variation of the light module of Figure 3.

[0049] [Fig 7] is a perspective representation of a light module according to a second embodiment of the invention.

[0050] [Fig 8] is a perspective representation of a light device glass according to the invention, on which the projection lens is directly formed.

[0051] Detailed description

[0052] In the following description, the terms "horizontal", "vertical", "lower" and "upper" are to be understood when the light module is oriented in a normal and operational position such as on the motor vehicle for which it is intended. This orientation corresponds to that in figures 1 to 8. It should be noted that the width is measured horizontally and the height vertically.

[0053] Figure 1 is a representation, seen from above, of a motor vehicle 2 equipped with a light device forming a rear light 4, in this case a left rear light, capable of being observed and correctly perceived by following motorists located at the rear. In this case, the vehicle 4 is moving on a central traffic lane while the two following motor vehicles are each moving on a traffic lane located laterally to the so-called central traffic lane. Each of the two motorists located respectively in each of the following motor vehicles, whether the driver is a left-hand drive or right-hand drive vehicle, must be able to correctly perceive the light signal from the rear light 4 from a certain distance. The rear light 4 has an optical axis 6 which is parallel to the longitudinal axis of the vehicle 2.It can be observed that the field of view of the rear light 4 extends horizontally on either side of the optical axis 6, and in a symmetrical manner. The field of view thus extends horizontally approximately + / - a relative to the optical axis 6, in this case + / - 40° relative to said axis. This is a desirable minimum field of view, particularly in line with the regulations relating to motor vehicles. It is notably greater than the horizontal extension of the photometric grids defined by these regulations, which is generally + / - 20°.

[0054] Figure 2 is a representation, in side view, of the vehicle 4 of Figure 1. The presence of a following motorist can be observed, which may correspond to one of the two following motor vehicles of Figure 1. The following vehicle could also be moving on the same lane as the motor vehicle 2 equipped with the lighting device of the present disclosure. Depending on the height at which the following motorist is, in particular depending on the type of vehicle, and the distance at which he is, he must be able to correctly perceive the light signal of the rear light 4. It can be observed that the field of view of the rear light 4 extends vertically on either side of the optical axis 6, and asymmetrically, namely from +p upwards and from -y downwards. This asymmetry is linked to the fact that the possible vertical position range for the following motorist is not centered on the optical axis 6 of the rear light, but rather offset upwards.In this case, the field of view extends vertically from -y=10° to +[3=20° relative to the optical axis 6. This vertical field of view is - moreover - consistent with the regulations relating to motor vehicles when the mounting height of the signaling system is relatively low. Indeed, the vertical extension of the photometric grids defined by this regulation is generally + / - 10° The above illustrates the regulatory constraints of a luminous device, in this case a rear light, of a motor vehicle and makes it possible to explain the meaning and interest of the measures of the invention.

[0055] Figure 3 is a schematic side view of a light module according to the invention, which can then be integrated into the rear light 4 of the motor vehicle 2 illustrated in Figures 1 and 2.

[0056] The light module 8 comprises an imager 10 forming a matrix 10.1 of light sources, preferably of the light-emitting diode (LED) type. It is therefore a generally flat and matrix imager, each pixel of which is luminous. Each of the light sources or pixels can be electrically powered individually, in particular so as to produce a stylized light image such as a pictogram, a symbol or even text. It is however understood that the imager 10 can also form more basic light images such as a rectangle or a square, in particular to provide one or more conventional light signaling functions such as a stop function, direction indicators, lantern, fog light, reversing light, etc. The light module also comprises an optical projection device which is in this case embodied by a lens 12. The latter conventionally comprises an input face 12.1, an output face 12.2 and a focus 12.3. This is a converging lens which may in particular be of the plano-convex, biconvex or meniscus-shaped type. The imager 10 is located between the focus 12.3 and the entrance face 12.1 of the lens 12, in this case at a distance from said focus 12.3 and said entrance face 12.1, so that the lens 12 can project an enlarged image of the imager 10. The virtual enlarged image 10' is represented at the focus 12.3.

[0057] The positioning of the imager 10 between the input face 12.1 of the lens 12, in this case at a distance from said focus 12.3 and said input face 12.1, is advantageous in that it makes it possible to project a luminous image with a given luminance while reducing the size, cost and electrical consumption of the imager 10 in comparison with a situation where the projection lens would be absent and the imager would have the desired luminous image size. Indeed, it is easily understood that enlarging the luminous image by means of the optical projection device, in this case being a lens 12, makes it possible to reduce the size and cost of the imager.The gain in energy efficiency is explained by the fact that the size of the light image formed through the lens is larger than the image of the imager, and by the fact that the luminance of the light image, which is precisely the visible light flux emitted by a surface element of the image in a given direction, per unit area and per unit solid angle, is unchanged during optical enlargement by the lens 12. More precisely, the luminance of the image is equal to the luminance of the imager itself, ignoring the light losses when passing through the optical device, such as for example the Fresnel reflection factors at the interfaces, and the absorption of the material(s) making up the optical device. In other words, only these losses are likely to reduce the luminance of the image. The input face 12.1 of the lens being larger than the imager 10, but also larger than the light image of the imager, no ray coming from the edge of the imager is obscured by the edge of the lens so that the image is seen entirely by an observer - without vignetting effect. Thus, the electrical power consumed by the imager is much lower than the power consumed by a larger imager, having the desired light image size, and without a projection lens. It is understood, however, that what has just been described applies for luminance in directions close to that of the optical axis, that is to say in the horizontal and vertical fields of view as described above in relation to Figures 1 and 2.

[0058] Figure 4 is a rear view of the imager and projection optical device of the light module of Figure 2, along the direction of the optical axis.

[0059] Figure 4 illustrates an asymmetry between the imager and the optical projection device, in this case a projection lens, making it possible to optimize the luminance of the luminous image in the horizontal and vertical fields of view described above in relation to figures 1 and 2.

[0060] It is observed that the projection lens 12 is more extended horizontally than vertically relative to the imager 10. The reason is to be able to capture more horizontally diverging light rays and thus ensure sufficient luminance in the horizontal field of view which is larger than the vertical field of view.

[0061] In Figure 4, the imager 10 and the projection lens 12 are rectangular, it being understood that other shapes are conceivable. The imager 10 has a width I and a height h, and the projection lens, at least its entrance face and / or its exit face, has a width L and a height H. Each of the width L and the height H of the projection lens 12 is greater than the width I and the height h of the imager 10, respectively. However, in accordance with the above, the width L is more greater than the width I than the height H is greater than the height h, namely Ll>Hh. More particularly, this asymmetry can be expressed by the relation Ll>n (Hh), where n is greater than or equal to 1, more particularly greater than or equal to 2, preferably 3, and / or less than or equal to 5.

[0062] Still in Figure 4, it can be observed that the imager 10 can be vertically decentered, in this case downwards, relative to the optical projection device, being in this case a projection lens 12. This vertical downward decentering is explained by the asymmetry of the vertical field of view, as illustrated in Figure 2, namely where j3>y. The vertical downward decentering of the imager 10 makes it possible to collect more rays diverging upwards and thus to ensure sufficient luminance in the upward direction according to the angle |3 in Figure 2. Also, the center of the imager is imaged in a direction which connects the center of the imager to the optical center of the projection lens 12 (namely its zone of maximum thickness). Thus the center is imaged upwards and the overall image is located on an angular field more upwards than downwards, relative to a horizontal axis.

[0063] Figure 5 is a schematic side view of two variants of the light module of Figure 3, corresponding to different magnification ratios.

[0064] At the top of Figure 5, it can be observed, in comparison with Figure 3, that the imager 10 is closer to the focus 12.3 of the projection lens 12 than to the input face 12.1 of said projection lens 12, with the consequence of increasing the magnification ratio between the imager 10 and its virtual image 10'. The magnification ratio can thus be greater than 2 as long as the distance between the focus 12.3 and the imager 10 is less than the distance between the imager 10 and the input face 12.1 of the projection lens. A particularly high magnification ratio, for example beyond 3, can be interesting but nevertheless has the limitation that the visual field, in which the projected image is visible, is angularly reduced. At the bottom of Figure 5, we can observe the opposite of the top of Figure 5, namely a magnification ratio less than 2 as soon as the imager 10 is closer to the entrance face 12.1 of the projection lens than of the focus 12.3. A low magnification ratio limits the constraints on the angular extension of the field of view in which the projected image is visible, but reduces the economic advantage of reducing the size of the imager.

[0065] The magnification ratio of the light module of the invention is advantageously between 1.5 and 3, corresponding to a compromise between reduction in manufacturing and usage costs and optical performance.

[0066] Figure 6 is a side schematic representation of the light module of Figure 3 illustrating the downward decentering of the imager relative to the projection lens, as shown in Figure 4.

[0067] We can in fact observe a downward decentering between the optical axis 6 of the light module, corresponding to the optical axis of the projection lens, and the central axis 10.3 of the imager 10. As already mentioned in relation to figure 4, this downward decentering makes it possible to optimize the luminance of the projected image in the asymmetrical vertical field of view, namely more extended upwards than downwards.

[0068] It should be noted that independently of the downward decentering mentioned above, the projection lens 12 may be truncated at its lower edge, taking into account the smaller downward extent of the field of view. Indeed, the imager 10 may be vertically centered with the projection lens, while the latter may be truncated in its lower part and thus present an apparent centering which is in reality rather a vertical offset resulting from the truncated lower edge of the projection lens. Such an arrangement makes it possible to exploit more upwardly diverging rays for the luminance in the upper part of the vertical field of view.

[0069] Figure 7 is a perspective representation of a light module according to a second embodiment of the invention. The reference numbers of the first embodiment are used to designate identical or corresponding elements of the second embodiment, these numbers being increased by 100. Reference is also made to the description of these elements in the context of the first embodiment. The light module 108 of Figure 7 differs from that of the first embodiment in that the projection lens 112 extends horizontally with a constant section over a major part of this horizontal extent. This means that the projection lens 112 in question has a horizontal optical power Ph of zero or at least very low. The horizontal magnification Gh is then close to 1. The projected image consequently has a size close to that of the object, in the direction considered.The concept of optical power corresponds to the vergence or the inverse of the focal length, that is to say the distance between the optical projection device, in this case the projection lens, and the focus. The magnification is a ratio of the magnitude of a focal object to its image through the optical projection device, the magnitude being in this case considered perpendicular to the optical axis of the optical projection device. The imager 110 also and similarly extends horizontally along the projection lens 112. The vertical optical power Pv and / or the vertical magnification Gv of the projection lens 112 thus make it possible to ensure a vertical magnification of the projected image while no horizontal magnification takes place or a significantly smaller horizontal magnification takes place.

[0070] It is advantageous to provide Pv greater than Ph and / or Gv greater than Gh, especially when the light device and therefore the optical projection device is significantly more extended horizontally than vertically. In such a configuration, a Ph or Gh value close to Pv or Gv, respectively, would require a complex optical projection device, such as a particularly thick lens, and therefore not only bulky but also expensive.

[0071] The light module in Figure 7 may be useful for displaying pictograms in the form of text or at least a line of characters or signs.

[0072] Figure 8 is a perspective representation of a closing glass of a housing (not shown) intended to receive a light module according to the invention, in particular according to the two embodiments described above, on which the projection lens is directly formed.

[0073] The glass 14 or 114 forms, in a manner known and conventional per se, a transparent or translucent wall intended to be fixed along its periphery to the housing (not shown) intended to receive a light module according to the invention, in particular for the purpose of protecting said light module from bad weather and other aggressions from the outside world. It is preferably made of plastic material, such as for example polycarbonate (PC) or polymethyl methacrylate (PMMA), and for example produced by injection molding. It comprises an outer face, intended to be outside the housing, and an inner face, intended to be inside said housing. It can be seen that the projection lens 12 or 112 is in contact with the inner face of the glass 14 or 114.The projection lens 12 or 112 is advantageously made of plastic material, such as for example polycarbonate (PC) or polymethyl methacrylate (PMMA), and for example made by injection molding. For this purpose, one of the glass 14 or 114 and the projection lens 12 or 112 is initially made by injecting plastic material into a mold according to a first configuration, and then the other of the glass 14 or 114 and the projection lens 12 or 112 is made by injecting plastic material into the same mold but according to a second configuration. The first configuration forms a volume corresponding to that of the glass 14 or 114 and the projection lens 12 or 112 which is initially formed, while the second configuration forms a larger volume corresponding to that of the glass 14 and the projection lens 12 or 112. The glass 14 or 114 and the projection lens are then co-molded.It is however understood that other methods or variants to the method described above are conceivable. For example, the mold may comprise a single cavity having the shape of the projection lens 12 or 112 combined with the shape of the glass 14 or 114.

[0074] Generally, the projection lens may have an anti-reflective coating on the exit face and / or on the entry face. The anti-reflective coating on the exit face is particularly advantageous in that it reduces the luminance of the external light reflected towards an observer and thus avoids a reduction in contrast between the luminous image of the imager and the reflected external light. The application of such an anti-reflective coating is also advantageous on the glass, in particular on the outer face, for the same reasons as for the projection lens. When the projection lens is formed directly on the inner face of the glass, as illustrated in Figure 8, it is understood that the anti-reflective coating is then applied to the outer face of the glass and / or to the entry face of the projection lens. The anti-reflective coating mentioned above is in itself well known to those skilled in the art.

[0075] Also generally, the projection optical device may have a horizontal optical power Ph and a vertical optical power Pv greater than the horizontal optical power Ph. Similarly, the projection optical device may have a horizontal magnification Gh and a vertical magnification Gv greater than the horizontal magnification Gh. The optical power and / or the magnification may vary in directions perpendicular to the optical axis.

Claims

CLAIMS [Claim 1.] Light module (8; 108) for a motor vehicle (2), comprising: - an optical projection device (12; 1 12) with a focus (12.3; 1 12.3), an input face (12.1; 1 12.1) and an output face (12.2; 1 12.2); - an imager (10; 110) forming a matrix (10.1) of light sources (10.2), arranged between the focus (12.3; 112.3) and the input face (12.1; 112.1) so that the optical projection device (12; 112) can project an enlarged image of said imager (10; 110); characterized in that the imager (10; 1 10) has a width I and a height h, the input face (12.1; 1 12.1) and / or the output face (12.2; 1 12.2) have a width L and a height H, where L>l, H>h, and Ll>Hh, so that the light module (8; 108) has a horizontal field of view greater than a vertical field of view, when said light module is oriented in the mounting position on the motor vehicle (2). [Claim 2.] Light module (8; 1108) according to claim 1, in which Ll>n (Hh), where n=2, preferably n=3, more preferably n=5. [Claim 3.] Light module (8; 108) according to one of claims 1 and 2, wherein the imager (10; 110) comprises a center in a vertical direction and the optical projection device (12; 112) comprises an optical axis (6; 106), said center being offset downwards relative to said optical axis (6; 106), when the light module (8; 108) is oriented in the mounting position. [Claim 4.] Light module (8; 108) according to one of claims 1 to 3, wherein a horizontal projection of the imager (10; 110) on the input face (12.1; 112.1) is completely included in said input face, when the light module (8; 108) is oriented in the mounting position. [Claim 5.] Light module (8; 108) according to one of claims 1 to 4, in which the imager (10; 110) is arranged between the focus (12.3; 1 12.3) and the input face (12.1; 1 12.1) so as to obtain a magnification ratio of the projected image of between 1.5 and 2.

5. [Claim 6.] Light module (8; 108) according to one of claims 1 to 5, in which the optical projection device (12; 112) has a horizontal optical power Ph and a vertical optical power Pv, where Ph Pv, preferably Ph <Pv, lorsque le module lumineux (8 ; 108) est orienté dans la position de montage. [Claim 7.] Light module (8; 108) according to one of claims 1 to 6, in which the optical projection device (12; 112) has a horizontal magnification Gh and a vertical magnification Gv, where Gh Gv, preferably Gh <Gv, lorsque le module lumineux (8 ; 108) est orienté dans la position de montage. [Claim 8.] Light module (8; 108) according to one of claims 1 to 7, in which the optical projection device (12; 112) is a lens, preferably comprising an anti-reflection treatment on the entry face (12.1; 112.1) and / or on the exit face (12.2; 112.2). [Claim 9.] The light module (108) of claim 8, wherein the lens (112) extends horizontally over at least 80% of the width L with a constant cross-section. [Claim 10.] Lighting device comprising a housing, a closing glass (14; 114) of the housing and a light module (8; 108) housed in the housing, in which the light module (8; 108) is according to one of claims 1 to 9, and, the optical projection device being a lens (12; 112) formed directly on an inner face of the closing glass (14; 114).

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