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    • 专利摘要:
    The invention relates to a motor vehicle light module intended to generate a light beam projecting an image (I1) forward. Said image (I1) comprises at least one horizontal row (4, 5) of illumination units (Z1 to Z10; W1 to W10). According to the invention, the light module is arranged so that a first illumination unit (W8, W9, W10) of the horizontal row (4) of illumination units comprises a lower end (52) and / or upper (51) which is vertically offset relative to a respectively lower (54) and / or upper (53) end of a second illumination unit (W1 to W7) of the same row.
    公开号:FR3084440A1
    申请号:FR1857088
    申请日:2018-07-30
    公开日:2020-01-31
    发明作者:Pierre Renaud；Alexandre JOERG
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    LIGHT MODULE OF A MOTOR VEHICLE CAPABLE OF GENERATING A LIGHT BEAM WITH AT LEAST ONE ROW OF ILLUMINATION UNITS
    The invention relates to a motor vehicle light system which is capable of producing a light beam projecting forward an image comprising at least one horizontal row of illumination units.
    Such a light beam is also called a pixel beam or “pixel beam” or “multibeam” in English.
    Generally, these illumination units are arranged side by side in a horizontal row. There may be one or more horizontal rows of illumination units.
    By switching off or on selectively each elementary light source, the off or on state of the corresponding illumination unit is checked. The beam then consists of a plurality of illumination units, on or off depending on the presence of other vehicles in the emission zone.
    Thus, the light module capable of generating such a light beam is often used in addition to a light module producing a portion of the main beam in front lighting devices to perform an adaptive lighting function, also called “Adaptive Driving Beam "Or ADB in English.
    Indeed, a low portion, which can come from another module, lights up under the horizon and the illuminated illumination units complement the lighting above this low portion and of the horizon so as to form a beam at Long range.
    The illumination units can then be turned off so as to create a gray area at the location of another vehicle being followed or coming in the opposite direction. Consequently, the risk of dazzling the driver of the other vehicle is reduced while maintaining good visibility of the road thanks to the illumination units which are not switched off.
    In another example, the light module forming a pixelated light beam can also be used in addition to a light module forming a passing beam, also called a code beam, or a low portion of passing beam. In this configuration, the pixelated light beam can contribute to performing turning functions, or also called "dynamic bending light" or DBL in English, for the various functions of the code beam.
    The abovementioned ADB or DBL functions are lighting functions which improve the quality and the comfort of visibility of the lighting device. There is therefore a growing development of lighting devices integrating these functions.
    The regulations are evolving along with the development of these lighting devices. The latter must therefore comply with national and / or regional regulations, in particular with large regulatory groups, such as in Europe, China and the United States.
    For example, the photometry of a regulatory passing beam must include areas whose light intensity respects values imposed by regulations.
    For example, in Europe, there is Regulation R123 of the United Nations Economic Commission for Europe. This regulation, also called in short UNECE R123 regulation, relates to the provisions concerning the approval of adaptive front lighting systems intended for motor vehicles.
    The version in force on October 21, 2013 of the UNECE R123 regulation requires that, for right-hand traffic, the segment located from 8 ° R to 20 ° R and 0.57 ° U of the cut line must have an intensity less than or equal at 3550 cd. This segment is also called “BRR segment”.
    Here, the acronyms “R” and “U” correspond respectively to the abbreviation of the terms “right” for “droit” in French and “up” for “haut” in French.
    In the case of a pixelated light beam helping to achieve a turning function, there is generally a row of illumination units plumb with a horizontal cut line to perform the BL function of the passing beam final. However, since each illumination unit has a height greater than 0.57 °, and for example from 0.7 ° to 1 °, at least one illumination unit of said row is superimposed on the BRR segment of the beam of basic crossover.
    Consequently, the illumination unit brings additional light intensity to the area of the BRR segment. This may cause the light intensity of the BRR segment to exceed the regulatory value and therefore make the lighting device non-compliant.
    Areas where photometric characteristics must comply with regulations such as that of the BRR segment are also called restricted areas.
    The technical problem which the invention aims to solve is therefore to obtain a pixelated light beam which can be combined with a portion of a second light beam so as to produce a main lighting beam integrating an adaptive function, such as ADB , DBL, while forming a main lighting beam where the risks of light overcurrent in certain areas are reduced, in particular which complies with regulations.
    To this end, a first object of the invention is a light module of a motor vehicle intended to generate a light beam projecting an image forward. The image includes at least one horizontal row of illumination units.
    According to the invention, the light module is arranged so that a first illumination unit of the horizontal row of illumination units comprises a lower and / or upper end which is offset vertically with respect to one end respectively lower and / or upper of a second illumination unit of the same row.
    In other words, on the image of the light beam, there is at least one row of illumination units where the illumination units are not all aligned.
    Of course, the offset can be applied to several lighting units in the row. Thus, in the same row, one or more illumination units can be placed in offset with the other units.
    It is thus possible to arrange the module in such a way that the offset unit or units of illumination are those capable of being overlapped with certain regulated zones before being offset. Such an arrangement goes against what is commonly applied and the prejudice of wanting to exactly align light strips and / or the lighting units in a row.
    In the example cited above, the offset illumination units are units that would cross the BRR segment if the row contained only aligned units.
    Therefore, in the absence of an illumination unit at the location of the BRR segment, there is little risk that the light intensity exceeds the imposed value.
    Thus, thanks to the light system according to the invention, the final main lighting beam therefore meets the conditions imposed by the regulations.
    The light system according to the invention can optionally have one or more of the following characteristics:
    - Said first illumination unit comprises an upper end offset downwards relative to an upper end of said second illumination unit;
    - Said first illumination unit comprises a lower end offset downwards with respect to a lower end of said second illumination unit;
    - Said first illumination unit has a height less than the height of said second illumination unit; this paragraph and the two preceding ones describe three different ways of shifting at least one illumination unit with respect to the other units in the same row; the dimension, measured in the vertical direction, or otherwise called the height dimension, of the unit concerned can be reduced; alternatively, the dimension of the unit concerned remains identical to that of the other non-offset units, but the latter is moved vertically downwards or upwards; finally, we can combine the two previous methods, that is to say both decrease the height dimension of the unit and move it vertically up or down;
    - the first illumination unit is located below a horizontal line located at 0.57 ° U; and the second illumination unit straddles said horizontal line located at 0.57 ° U; the light module thus reduces the risk of glare up to the BRR segment, and in particular of non-compliance with the UNECE R123 regulation specified above;
    - The first illumination unit comprises an upper end situated at the same level or below a horizontal axis at 0 ° U and the second illumination unit overlaps said horizontal axis; thus, the light module reduces the risk of dazzling at the level of the horizon in a defined zone in front of the vehicle while increasing the range outside this zone; the module could for example be used to apply the standard “FMVSS” n ° 108 applied in the United States; FMVSS is an acronym for "Federal Motor Vehicle Safety Standard" in English;
    - the light module includes:
    o several primary light sources;
    o an optical element disposed downstream of the matrix of light sources and comprising a plurality of light guides; each guide comprising an inlet face arranged opposite an associated primary light source and an outlet; the light guide exits forming secondary light sources;
    o a projection assembly arranged downstream of the light guides so as to project the image of the secondary light sources forward;
    the optical element and the projection assembly are arranged in such a way that the output of each light guide is coplanar with a focal plane of the projection assembly; in fact, the outputs of the light guides form a matrix of the secondary light sources; said matrix is then imaged by the projection assembly to form the final image of the light module of the invention; thus, by arranging the outputs of the light guides in the focal plane of the projection optics, all the secondary light sources are imaged clearly and the light distribution is homogeneous;
    the optical element comprises a first light guide, participating in the generation of the first illumination unit and a second light guide participating in the generation of the second illumination unit, the first guide and the second each comprising a output, respectively the first output and the second output; the first outlet has a lower and / or upper edge which is vertically offset relative to a respectively lower and / or upper edge of the second outlet;
    the projection assembly comprises a secondary optic disposed at the front of the optical element and a primary optic disposed between the secondary optics and the secondary light sources;
    - According to the preceding paragraph, the optical element comprises the primary optics and the light guides, the primary optics and the light guides being produced in a single piece;
    - each primary light source is a light-emitting diode, also called LED in acronym for “light-emitting diode”.
    The invention also relates to a lighting device comprising a light module according to the invention.
    The lighting device according to the invention can optionally have one or more of the following characteristics:
    the lighting device comprises a second light module arranged so as to generate a main portion of the lighting beam; the light module according to the invention is arranged so as to generate a complementary portion with said main portion to form a light beam; the latter may be a driving beam and / or a passing beam; thus, the light module forming a pixelated light beam according to the invention is combined with the second light module to generate an adaptive lighting beam; said beam therefore integrates the functions ADB, BL, which makes it possible to improve the comfort of use of the lighting device;
    - According to the preceding paragraph, the second light module generates a lower part of the passing beam, and the light module according to the invention is arranged so that it generates a light beam forming an upper part of the passing beam which is lit in addition to the lower part of the passing beam.
    Unless otherwise indicated, the terms "front", "rear", "lower", "upper", "top", "bottom" "side", "transverse", "right", "left" refer to the meaning of light emission outside the corresponding light module. Unless otherwise indicated, the terms "upstream" and "downstream" refer to the direction of propagation of light in the object which quotes them.
    Other characteristics and advantages of the invention will appear on reading the detailed description of the following nonlimiting examples, for the understanding of which reference will be made to the appended drawings, among which:
    - Figure 1 illustrates a perspective view of a light module produced according to a first embodiment according to the invention;
    - Figure 2 illustrates a downstream perspective view of a support of an array of light emitting diodes;
    FIG. 3 illustrates an upstream perspective view which represents the rear of an optical element forming part of the light module of FIG. 1.
    - Figure 4 illustrates a sectional view along the horizontal section plane 4-4 of Figure 1; said view illustrating a plan in which are located exits of
    guides of light from The optical element of the figure 3; - figure 5 illustrates the picture of the beam luminous generated by the light module of the Figure 1, and 1'image a lower part beam of crossing in one arrangement that can comply at UNECE R123 regulation
    applied in Europe;
    FIG. 6 illustrates the image of a light beam generated by a light module produced according to a second embodiment of the invention, and the image of a lower part of the passing beam in an arrangement which may be in accordance with FMVSS 108 standard applied in the United States.
    Referring to Figure 1, there is illustrated a light module 1 capable of generating a light beam. Here, the light module 1 emits the light beam longitudinally from the rear to the front, as illustrated by the arrow L in FIG. 1.
    Said beam projects forward an image composed of a plurality of lighting zones, also called illumination units, here, in rectangular shape and arranged in at least one horizontal row.
    The light beam generated by the light module 1 is, for example, lit in addition to a main lighting beam, such as a code beam or a driving beam, to form a directional dipped beam, also called "Bending Light ”, or an adaptive high beam, also called“ Adaptive Driving Beam ”.
    The light module 1 illustrated in FIG. 1 comprises means 10 for emitting light, a projection assembly 30 placed at the front of said means 10 for emitting and an optical element 20 disposed between these two elements.
    Here, the light emission means 10 are composed of a printed circuit board 11, also called “printed circuits board” or “PCB” in English, and of a plurality of light sources 14 which are here light-emitting diodes. 14, or commonly called LED for short in English.
    In the example presented, the light-emitting diodes 14 are arranged in two transverse rows including a first row 15 and a second row 16. Said rows are perpendicular to the direction of propagation of the light of the light module 1. Each row 15 or 16 comprises ten separate light-emitting diodes 14 as illustrated in FIG. 2.
    According to the invention and in this example, three of the ten light-emitting diodes of the first row are not aligned with other diodes in the same row. Here, the three non-aligned light-emitting diodes 150, 151 and 152 are those located to the right of FIG. 2. The reason for their offset with respect to the other diodes will be explained later in the description.
    The assembly of the two rows 15, 16 of light-emitting diodes 14 constitutes a matrix 12 of light sources. Said matrix 12 is mounted on a front face 17 of the printed circuit board 11.
    In addition, in order to remove the heat generated by the light sources 14, the printed circuit board 11 is mounted on a radiator, the cooling fins 13 of which are installed on a rear face 18 of said card 11.
    In other words, here, the radiator and the printed circuit board 11 form the support for the matrix 12 of light sources.
    Referring to Figure 3, the optical element 20 comprises an output diopter 35, a solid front portion 350 disposed upstream of the output diopter 35, and a plurality of guides substantially parallel and distinct from each other. The guides extend longitudinally rearward from the front portion 350, and in particular have an identical length.
    In an alternative embodiment, some guides may be longer than others. For example, the outer guides may be longer than the guides in the center.
    In the example presented, the optical element 20 comprises two rows of light guides including a top row 21 and a bottom row 22. Each row 21 or 22 brings together ten light guides. The number of light guides per row corresponds to the number of light-emitting diodes 14 per row 15, 16 of the matrix 12 of light sources.
    The light guides in the top row 21 are numbered, in order from left to right in Figure 3, from 210 to 219 while the light guides in the bottom row are numbered from 220 to 229 in the same order.
    For the sake of clarity, only a few light guides are referenced in Figure 3.
    Here, the light guides in the same row have the same height. However, the guides at the end of each row are wider than the other guides in the same row.
    Furthermore, the guides of the bottom row 22 have an elongated section in the vertical direction V. The section obtained from each bottom guide is longer than it is wide. In other words, the height dimension of the guides of the bottom row 22 is greater than that of the top row 21.
    As for the guides of the top row 21, with the exception of the guides at the ends 210 and 219, they have a substantially rectangular section, possibly square.
    Apart from the geometric particularities described above, all the guides each include an inlet face and an outlet.
    Here, the entry faces of the light guides are visible in FIG. 3 and in the example illustrated, these are entry diopters.
    The entry faces of the light guides are arranged in a first plane SI which is here parallel to the plane of the printed circuit board 11. When the optical element 20 is installed in the light module 1, each entry face is placed opposite a corresponding light-emitting diode 14 so that the major part of the light rays emitted by said diode 14 enters the corresponding light guide.
    Here, the entry faces of the top row 21 are placed opposite the light-emitting diodes 14 of the first row 15. The entry faces of the bottom row 22 are placed opposite the light-emitting diodes 14 of the second row 16.
    The entry faces of the light guides in the top row 21 are numbered, in order from left to right in FIG. 3, from 230 to 239 while the entry faces of the light guides in the top row bottom 22 are numbered 240 to 249 in the same order.
    For the sake of clarity, only a few entry faces are referenced in FIG. 3.
    According to the invention and in this example, three light guides 210, 211 and 212 of the top row 21, considered from the left of FIG. 3, are not aligned with the other guides of the same row. Said three guides 210, 211 and 212 are hereinafter called the offset guides while the other guides are called the non-offset guides.
    As observed in FIG. 3, the offset of the light guides means that the entry faces 230, 231 and 232 of the three offset guides 210, 211 and 212 are placed higher than the entry faces 233 to 239 of the guides not - shifted from 213 to 219.
    In this example, the heights of the entry faces 230, 231 and 232 of the offset guides 230, 231 and 232 remain identical to the other guides. Here, the first offset guide 230, counted from the left of FIG. 3, which is also the guide located at the end of the top row 21, comprises a first entry face 230 which has the same height as the tenth entry face 239 located at the opposite end of the top row 21.
    The second and third offset guides 211 and 212 comprise the input faces of the same size as those of the non-offset guides, of course, with the exception of the non-offset guide located at the right end of the row at the top 21 .
    To place the entry faces 230, 231 and 233 offset from the others, the associated light guides 210, 211 and 212 are positioned higher than the other guides. In other words, the guides 210, 211 and 212 are offset in an upward vertical translation.
    Here, all the light guides from 220 to 229 in the bottom row 22 remain aligned with each other.
    The optical element 20 is placed in front of the matrix 12 of light sources so that the entry face of each light guide is positioned opposite an associated elementary light source 14 and so that the light beam emitted by each source elementary light 14 is propagated in the associated light guide by entering by the entry face and leaving by the exit.
    In particular, the input faces 230, 231 and 232 of the offset guides 210, 211 and 212 are placed opposite the non-aligned light-emitting diodes 150, 151 and 152 of the first row 15 of light-emitting diodes.
    Indeed, thanks to the offset of the non-aligned light-emitting diodes 150, 151 and 152, the input faces 230, 231 and 232 are face to face of said non-aligned diodes so that the main axis of light emission of these diodes crosses the symmetrical center of these input faces. Thus, the input faces 230, 231 and 232 capture the majority of the light rays emitted by the diodes 150, 151 and 152 for better optical efficiency.
    The outputs of the light guides form secondary light sources 34. The latter are imaged by the projection optics 30 to form a light beam.
    In order to distinguish the light-emitting diodes 14 from the secondary light sources 34 made up of the outputs of the light guides, the light-emitting diodes 14 carried by the printed circuit board are also called the primary light sources 14.
    In FIG. 4, we can observe the outputs of the light guides in the top row 21. Despite the offset of the light guides in the top row 21 and the light-emitting diodes in the first row 15, the section plane 4- 4 in FIG. 1 is placed so as to show all the light guides in the top row 21 and all the light-emitting diodes in the first row 15 in FIG. 4.
    The light guide outputs of the top row 21 are numbered, in order from bottom to top of FIG. 4, from 330 to 339.
    For the sake of clarity, only a few outputs are referenced in FIG. 4. For example, the outputs of the offset light guides 230, 231 and 232 are numbered 330, 331 and 332 respectively.
    In the same way as the input faces, the outputs of the light guides are also placed in a second plane parallel S2 to the plane of the printed circuit board.
    According to the invention and in this example, the projection optics 30 and the light guides 210 to 219, 220 to 229 are arranged so that all the outputs of the light guides are coplanar with the focal plane P of l projection assembly 30. In other words, the second plane S2 where all the outputs 330 to 339 of the light guides 210 to 219 and 220 to 229 are located is coincident with the focal plane P of the projection optics 30.
    Thus, the image of the secondary light sources 34 is projected forward clearly and has a homogeneous light distribution.
    Although the offset of the outputs 330, 331 and 332 is not visible in the figures, it is understood that, given the offset position of the three guides 210, 211 and 212, the corresponding outputs 330, 331 and 332 of these guides are also offset vertically up relative to the other outputs in the same row.
    Of course, in another embodiment, the light guides can be designed so that only the outputs are offset and not the input faces of the light guides.
    To do this, simply bend the light guides chosen from back to front so that the bent guides include entry faces aligned with those of the other guides and exits offset vertically upwards or low compared to the outputs of other guides. Thus, in this configuration, the alignment of the light-emitting diodes 14 can be preserved.
    According to the invention and in the example illustrated, the projection assembly 30 comprises a secondary optic 32 disposed at the front of the light guides 210 to 219, and 220 to 229 and a primary optic 31 disposed between the secondary optics 32 and outputs 330 to 339.
    Here, the optical element 20 includes not only the light guides 210 to 219, 220 to 229 but also the primary optics 31. The primary optics 31 is placed in front of the outputs 330 to 339 of the light guides. The primary optic 31 is formed by the output diopter 35 of the optical element 20.
    In addition, the primary optics 31 and the light guides 210 to 219, 220 to 229 can be produced in a single piece, as in the example illustrated.
    The optical element 20, as described, can be made of silicone. It can also be made of glass or thermoformable plastic.
    The optical coupling between the primary optics 31 and the secondary optics 32 is carried out so as to form a converging system at the level of the focal plane P, which coincides with the second plane S2 where all the outputs 330 to 339 of the guides are located. from light.
    Optionally, a field correction lens can be interposed between the primary optic 31 and the secondary optic 32 so that the focal surface P of the projection assembly is perfectly coplanar with the second plane S2, by example when it is difficult to achieve with only the primary optics 31 and the secondary optics 32.
    Thus of projection composed of the primary and secondary optics 32 image the secondary light sources
    The light module 1 described above can be used in conjunction with a second light module intended to generate a main portion of the light beam.
    For example, the second light module generates a lower part B1 of the passing beam while the light module 1 generates a light beam forming an upper part H1 of the passing beam.
    When the beam, generated by the assembly of the light module 1 and of the second light module, is projected onto a vertical screen located at a distance from the light module, for example at 25 meters, and opposite said assembly, one obtains a final image I as illustrated in FIG. 5.
    The final image I is projected onto the screen in an orthogonal coordinate system R composed on the ordinate of a vertical axis V and on the abscissa of a horizontal axis H. The vertical axis V corresponds to a vertical axis above the road and the horizontal axis H symbolizes the horizon.
    The angular positions of the final image I in the frame R are expressed:
    [1] in degree Up (° U), "high" in French, for everything above the horizontal axis H;
    [2] in degree Down (° D), "bas" in French, for everything below the horizontal axis H;
    [3] in degree Left (° L), "Left " in French, for all this who to the left of the axis vertical V r and [4] in degree Right (° R), "Right " in French, for all this who is at right of 1 vertical axis V.
    Note that the example illustrated relates to right-hand traffic. For left-hand traffic, it is enough to take the symmetrical along a vertical plane from upstream to downstream for the module as for the beam.
    Here, the final image I is composed of an image II of the secondary light sources and of an image 12 of the lower part B1 of the passing beam.
    Note that the image II of the secondary light sources 34 is inverted in this embodiment of the light module. Indeed, the light beams from the top row 21 of light guides are projected downward while those of the bottom row 22 of light guides are projected upward.
    Each secondary elementary light source 34 illuminates an area of the screen. In other words, each of the zones ZI to Z10 and W1 to W10 therefore corresponds to the outputs of the light guides of the optical element 20.
    The zones on the screen ZI to Z10 as well as W1 to W10 are also called the illumination units, or "pixel" in English.
    The illumination units ZI to Z10 and W1 to W10 on the screen are arranged in two horizontal rows, including an upper row 4 and a lower row 5.
    In order to facilitate reading, the illumination units are called in shorthand "units".
    The upper row 4 contains the units ZI to Z10 which respectively correspond to the outputs of the bottom row 22 of the optical element 20, therefore to the light sources of the second row 16.
    Specifically, the unit ZI corresponds to the projected image of the output of the light guide 229 located at the right end of the bottom row 22 in FIG. 3. The unit Z2 corresponds to the output 248 of the light guide 228 located to the left of guide 229 at the right end. The unit Z3 corresponds to the output 247 of the guide 227 located to the left of the guide 228 and so on to the unit Z10. The unit Z10 corresponds to the outlet 240 of the light guide 220 which is located on the far left of the bottom row 22 in FIG. 3.
    The shape of each of these units is delimited by peripheral edges of the output of the associated light guide.
    Here, for each of the light guides, apart from the size, the shape of the entrance face remains similar to that of the exit. Thus, the units ZI to Z10 of the upper row 4 have a shape identical to that of the outputs 240 to 249 of the bottom row 22. Here, the units ZI to Z10 are rectangles whose height is greater than the width.
    In the same way as the outputs, zones ZI and Z10 are wider than zones Z2 to Z9.
    In the lower row 5 of units, the correspondence between the units W1 to W10 and the outputs of the top row 21 is done in a similar manner as the units ZI to Z10 with the bottom row 22.
    In particular, the last three units W8 to W10 respectively correspond to the projected images of the outputs 330, 331 and 332 of the three offset guides 210, 211 and 212 described above.
    In the example illustrated, the three units W8 to W10 are shifted vertically downward relative to the other units W1 to W7 in the same row.
    In general, the offset of the three units W8 to W10 is limited according to the vertical in order to maintain a rectilinear lighting at the level of the side of the road. For example, for optimal lighting of the aisle, this offset is only 1 ° down, here 1 ° under the BRR segment.
    For each of these three offset units W8 to W10, the upper edge 51 and the lower edge 52 of the unit in question are offset vertically downward with respect respectively to the upper edge 53 and to the lower edge 54 of the non-offset units W1 to W7.
    By individually controlling each primary elementary light source 14, here each light-emitting diode 14, it is possible to selectively illuminate each of the units W1 to W10 and ZI to Z10 so as to perform an adaptive function to the main lighting beam.
    A slight overlap between the lower row 5 of units and the lower part B1 of the passing beam is possible, in particular to ensure a smooth transition between these two elements.
    The arrangement of the illumination units is carried out so that the photometric distribution respects the conditions imposed by the UNECE R123 regulation.
    In this example, the three units W8 to W10 offset are located below the BRR segment which is at 0.57 ° U and between 8 ° R and 20 ° R. Thus, when these three offset units W8 to W10 are lit, they do not impact the light intensity of the BRR segment. Consequently, the light intensity measured at the BRR segment is not likely to exceed the value of 3550 cd as required by the regulations.
    In an application for a dipped beam, the light-emitting diodes 14 are adjusted so that the units ZI to Z10 of the upper row 4 are switched off. On the other hand, the units W1 to W10 of the lower row 5 can be selectively lit with the lower part B1 of the passing beam to produce an adaptive final passing beam integrating the BL function.
    When a vehicle is traveling in a straight line, the units W1 to W5, mainly located to the left of the vertical axis V, are switched off while the units W6 to W10, located to the right of the vertical axis V, are switched on so forming a high cutoff line of the passing beam. Since the zones W8 to W10 are offset, the light intensity at the level of the BRR segment complies with the regulations in force.
    For a right turn, the W8 to W10 units, or even including the W7 unit, are gradually lit from left to right, until the end of the turn, here the W10 unit located at the far right of the row when the turn is very pronounced.
    For a left turn, the units W1 to W5, located to the left of the vertical axis V, are gradually lit from right to left, that is to say from the unit W5 towards the unit W1, or even up to 'to the Wl unit when the turn is very pronounced, which allows better lighting on the driver's left side.
    Consequently, the light module 1 of the light system according to the invention generates an adaptive passing beam providing better visibility to the lighting during turns while respecting the conditions imposed by the regulations.
    In another example of use, for example for an adaptive high beam, the light-emitting diodes 14 are adjusted so that all the units ZI to Z10 and W1 to W10 are switched on, in particular when there is no vehicle traveling opposite.
    When the vehicle detects other vehicles either in front of or traveling in the opposite direction, the light-emitting diodes 14 are controlled so as to create a shadow zone at the location where the detected user is located. For example, to do this, the units W3, W4 of the lower row 5 of units and the units Z3 and Z4 of the upper row 4 of units are switched off.
    According to an alternative embodiment, the principle of shifting a few units in a row of units can be applied to the upper row 4 of units illustrated in FIG. 5.
    For example, in the case where the photometric measurement of the pixelated light beam H1 indicates that the lower zone of the units is too bright in the high beam, it is possible to shift at least one of the units ZI to Z10 from the upper row 4 d 'units vertically upwards.
    To do this, the guide or guides, participating in generating the unit or units offset in this upper row 4, comprise the outlet offset vertically downwards with respect to the other outlets of the other guides. Here, the guides to be shifted upwards are part of the guides 220 to 229 in the bottom row 22 of the optical element 20.
    Of course, the light system as well as the light module according to the invention can be configured so as to generate a light beam which complies with other regulations, for example the federal standards for the safety of motor vehicles of the United States, again called the standards "FMVSS" for "Federal Motor Vehicle Safety Standard" in English.
    Among these standards, the glare of oncoming vehicle drivers is measured and linked to the thresholds established from FMVSS 108.
    With reference to FIG. 6, there is illustrated a final image 13 of a light beam which can be adapted to the FMVSS 108 standard. The light beam can be a passing beam is in a configuration called according to this standard "VOR beam pattern For left-hand drive.
    The final image 13 is represented in a frame R identical to the frame presented in FIG. 5.
    The passing beam is composed of a lower part B2 of the passing beam and an upper part H2 of the passing beam. The upper part of the passing beam is generated by a light module produced according to a second embodiment of the invention while the lower part B2 of the passing beam is generated by a second light module known to those skilled in the art.
    Image 14 of the upper dipped beam part comprises a single row 6 of eight illumination units XI to X8, the arrangement of which is carried out so that the photometric distribution meets the conditions imposed on a dipped beam according to the regulations of the United States.
    In particular, two units X5 and X6 are vertically offset downward relative to the other units in order to comply with a condition of standard FMVSS 108 according to the last version in force on July 2018.
    Indeed, according to this condition, there must be no light above the horizon between 1 ° R and 3 ° R for a beam in a "VOR beam pattern" configuration. As illustrated in FIG. 6, the two offset illumination units X5 and X6 are those which would be supposed to cross the line situated between 1 ° R and 3 ° R and at 0 ° U if the illumination units were all aligned.
    Thanks to the invention, the two units X5 and X6 are shifted vertically downwards so that the upper ends 61 of said units X5 and X6 are in superposition with the line situated between 1 ° R and 3 ° R and at 0 ° U. In this way, there is no light above the horizon between 1 ° R and 3 ° R.
    The light module carrying the optical part participating in generating the image 13 therefore complies with the FMVSS 108 standard.
    In addition, such a light module is likely to get a good score during a safety assessment carried out by the Institute of Insurance Underwriters for Road Safety in the United States, or "Insurance Institute for Highway Safety" (IIHS) in English. Indeed, apart from the offset units X5 and X6, the other non-offset units XI to X4, X7 and X8 overlap the horizontal axis H at 0 ° U. Thus, when these non-offset units are illuminated, the range of the light beam is improved outside the areas where there is a risk of dazzling and where the FMVSS 108 standard recommends not to illuminate above the horizon.
    This increases the distance at which the light flux from the beam reaches a value of 5 lux. The greater this distance, the better the visibility of the light module and therefore the higher the grade of said module according to the criteria of the IIHS safety assessment.
    Thus, the light module according to the invention, and in particular according to this embodiment, offers good visibility while respecting the regulations in order to avoid the glare of a conductor coming opposite.
    To generate the image 13 illustrated in FIG. 6, an optical element is therefore used as in the previous embodiment. The optical element is adapted so as to comprise a single row of light guides composed of eight separate guides. The guides, participating in generating the offset units X5 and X6, each include an outlet offset vertically upwards with respect to the 10 outputs of the other guides.
    权利要求:
    Claims (14)
    [1" id="c-fr-0001]
    1. Light module (1) of a motor vehicle intended to generate a light beam projecting forward an image (II; 14); the image (II; 14) comprising at least one horizontal row (4, 5; 6) of illumination units (ZI to Z10, W1 to W10; XI to X6);
    said light module (1) being characterized in that it is arranged so that a first illumination unit (W8, W9, W10; X5, X6) of the horizontal row (4; 6) of units illumination comprises a lower end (52) and / or upper (51) which is offset vertically with respect to a respectively lower (54) and / or upper end (53) of a second illumination unit (W1 to W7 ; XI to X4, X7, X8) of the same row.
    [2" id="c-fr-0002]
    2. light module (1) according to claim 1, characterized in that said first illumination unit (W8, W9, W10; X5, X6) comprises an upper end (51) offset downward relative to an upper end (53) of said second illumination unit (W1 to W7; XI to X4, X7, X8).
    [3" id="c-fr-0003]
    3. light module (1) according to claim 2, characterized in that said first illumination unit (W8, W9, W10; X5, X6) comprises a lower end (52) offset downward relative to a lower end (54) of said second illumination unit (W1 to W7; XI to X4, X7, X8).
    [4" id="c-fr-0004]
    4. Light module (1) according to one of claims 1 to
    3, character sé in this than said first unit illumination (W8, , W9, W10, ; X5 X6) presents a height lower than the height of said second unit illumination (W1 at W7; XI at X4, X7, X8).
    [5" id="c-fr-0005]
    5. Light module (1) according to one of claims 1 to
    4, characterized in that the first illumination unit (W8, W9, W10) is located below a horizontal line located at 0.57 ° U and in that the second illumination unit (W1 to W7 ) overlaps said horizontal line at 0.57 ° U.
    [6" id="c-fr-0006]
    6. Light module (1) according to one of claims 1 to
    4, characterized in that the first illumination unit (X5, X6) comprises an upper end (61) situated at the same level or below a horizontal axis (H) at 0 ° U and in that the second illumination unit (XI to X4, X7, X8) overlaps said horizontal axis (H).
    [7" id="c-fr-0007]
    7. Light module (1) according to one of the preceding claims, characterized in that the light module (1) comprises:
    several primary light sources (14);
    an optical element (20) disposed downstream of the primary light sources (14) and comprising a plurality of light guides (210 to 219, 220 to 229); each guide comprising an inlet face (230 to 239, 240 to 249) arranged opposite an associated primary light source (14) and an outlet (330 to 339); the outputs (330 to 339) of the light guides (210 to 219, 220 to 229) forming secondary light sources (34);
    a projection assembly (30, 31, 32) disposed downstream of the light guides so as to project forward the image of the secondary light sources (34).
    [8" id="c-fr-0008]
    8. light module (1) according to claim 7, characterized in that the optical element (20) and the projection assembly (30, 31, 32) are arranged so that the outlet (330 to 339) of each light guide (210 to 219; 220 to 229) is coplanar with a focal plane (P) of the projection assembly (30).
    [9" id="c-fr-0009]
    9. light module (1) according to claim 7 or according to claim 8, characterized in that the optical element (20) comprises a first light guide (210, 211, 212), participating in the generation of the first unit illumination (W8, W9, W10) and a second light guide (213 to 219) participating in the generation of the second illumination unit (W1 to W7), the first guide and the second each comprising an output, respectively the first outlet and the second outlet, the first outlet (330, 331, 332) having a lower and / or upper edge which is offset vertically relative to a respectively lower and / or upper edge of the second outlet (333 to 339) .
    [10" id="c-fr-0010]
    10. Light module (1) according to one of claims 7 to 9, characterized in that the projection assembly (30) comprises a secondary optic (32) disposed in front of the optical element (20) and a primary optic (31) disposed between the secondary optic (32) and the secondary light sources (34).
    [11" id="c-fr-0011]
    11. light module (1) according to claim 10, characterized in that the optical element (20) comprises the primary optics (31) and the light guides (210 to 219, 220 to 229), the primary optics (31) and the light guides (210 to 219, 220 to 229) being produced in a single piece.
    [12" id="c-fr-0012]
    12. Motor vehicle lighting device, characterized in that it comprises a light module (1) according to one of the preceding claims.
    [13" id="c-fr-0013]
    13. Lighting device according to claim 12, characterized in that it comprises a second light module arranged so as to generate a main portion of the light beam, and in that the light module according to one of claims 1 to 11 is arranged so as to generate a complementary portion with said main portion to form a lighting beam.
    [14" id="c-fr-0014]
    14. Lighting device according to claim 13, characterized in that the second light module generates a lower part (Bl; B2) of the passing beam and in that the light module (1) according to one of claims 1 5 to 11 is arranged so that it generates a light beam forming an upper part (Hl; H2) of the passing beam which is lit in addition to the lower part (B1; B2) of the passing beam.
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    同族专利:
    公开号 | 公开日
    US20200032973A1|2020-01-30|
    CN110778983A|2020-02-11|
    FR3084440B1|2021-01-15|
    US10845017B2|2020-11-24|
    EP3611425A1|2020-02-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20080198574A1|2007-02-21|2008-08-21|Magna International Inc.|LED apparatus for world homologation|
    US20090016074A1|2007-07-09|2009-01-15|Magna International Inc.|Semiconductor light engine using glass light pipes|
    DE102013200442B3|2013-01-15|2014-02-13|Automotive Lighting Reutlingen Gmbh|Light module for a motor vehicle headlight, which is set up to generate strip-shaped light distributions|
    US20160040848A1|2014-08-11|2016-02-11|Koito Manufacturing Co., Ltd.|Vehicle lamp|
    WO2018024349A1|2016-08-03|2018-02-08|HELLA GmbH & Co. KGaA|Optical system comprising a light guide element and a joined body being materially connected to the light guide element|
    EP3301347A1|2016-09-29|2018-04-04|Valeo Vision|Lighting device for a motor vehicle comprising a light guide|
    EP3875838A1|2020-03-06|2021-09-08|Lumileds Holding B.V.|Lighting device with light guide|
    WO2021244736A1|2020-06-03|2021-12-09|HELLA GmbH & Co. KGaA|Headlamp for a motor vehicle|
    法律状态:
    2019-07-31| PLFP| Fee payment|Year of fee payment: 2 |
    2020-01-31| PLSC| Search report ready|Effective date: 20200131 |
    2020-07-31| PLFP| Fee payment|Year of fee payment: 3 |
    2021-07-29| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1857088A|FR3084440B1|2018-07-30|2018-07-30|AUTOMOTIVE VEHICLE LIGHT MODULE SUITABLE TO GENERATE A LIGHT BEAM WITH AT LEAST ONE ROW OF ILLUMINATION UNITS|FR1857088A| FR3084440B1|2018-07-30|2018-07-30|AUTOMOTIVE VEHICLE LIGHT MODULE SUITABLE TO GENERATE A LIGHT BEAM WITH AT LEAST ONE ROW OF ILLUMINATION UNITS|
    EP19188789.2A| EP3611425A1|2018-07-30|2019-07-29|Light module for a motor vehicle suitable for generating a light beam with at least one row of lighting units|
    US16/526,493| US10845017B2|2018-07-30|2019-07-30|Luminous motor-vehicle module able to generate a light beam with at least one row of pixels|
    CN201910699807.1A| CN110778983A|2018-07-30|2019-07-30|Motor vehicle lighting module capable of generating a light beam having at least one row of pixels|
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