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    • 专利摘要:
    The present invention relates to a vehicle lighting system (100), comprising at least a first projection device (200) of at least one pixelized light source (220) defining at least a first projection envelope (260) and at least one second projection device (300) of at least one pixellated light beam (320) defining at least one second projection envelope (360) and configured to project at least one pictogram (370), characterized in that said at least one first projection envelope (260) and said at least one second projection envelope (360) have at least one overlap zone.
    公开号:FR3056680A1
    申请号:FR1659347
    申请日:2016-09-29
    公开日:2018-03-30
    发明作者:Xavier Morel；Weicheng Luo
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    TECHNICAL FIELD OF THE INVENTION
    The present invention relates in particular to a lighting system. A preferred application relates to the automotive industry, for vehicle equipment, in particular for the production of devices capable of being able to emit light beams, also called lighting functions, generally meeting regulations. The emission of beams towards the front of the vehicle is particularly targeted.
    STATE OF THE ART
    Known lighting and signaling devices have hitherto been designed to emit, for example: a passing beam, a driving beam, a lighting beam for foggy weather, a signaling beam.
    The passing beam must ensure both the quality of the lighting and the absence, or reduction, of the disturbance caused by the light flux produced for the surrounding vehicles. Currently, the dipped beam headlights are essentially defined with this in mind, with, in particular, the use of sometimes complex cuts at the top of the beam, so as to precisely limit or avoid the illumination above the horizon line, and to design as best as possible a light projection area to be avoided since it is likely to annoy the driver of a crossed vehicle.
    Likewise current road beams have similar drawbacks, namely a very low resolution and degrees of freedom limited by their technology. Although improvements have been proposed for high beams, such as the use of two identical strip lights, this does not solve the problem of resolution that this type of technology can achieve.
    The emergence of highly resolved systems of the micro-mirror matrix type called in Anglo-Saxon terms "Digital Micromirror Device" (DMD), makes it possible to reduce these limitations, and the document US 2002/0196636 is a good example.
    However, here again, this type of system has many disadvantages when it is desired to adapt the projection of the light beams to particular and dynamic external conditions. There is in fact an inherent limitation in current technology which lies in the choice between lighting power and lighting resolution. Current high-resolution systems do not achieve the lighting characteristics of low-resolution systems, and low-resolution systems struggle to achieve the visual quality of DMD-type systems. Thus, there is a real need for dynamic and adaptive light projection systems.
    The invention is part of this.
    SUMMARY OF THE INVENTION
    The present invention relates to a lighting system for a vehicle, comprising at least a first projection device of at least one pixelated light source defining at least a first projection envelope and at least a second projection device of at least one pixelated light beam defining at least a second projection envelope and configured to project at least one pictogram, characterized in that said at least one first projection envelope and said at least one second projection envelope have at least one overlap zone.
    The present invention provides numerous degrees of freedom to a vehicle lighting system making it possible to improve the legibility of road writing relative to the prior arts: contrast management, better resolution, better precision.
    In addition, advantageously, the present invention improves the consistency at the interface of the projection envelopes from the two projection devices.
    The coupling of a pixelated light source (code beam with several zones for example) with at least one pixelized beam (of DMD type for example) in order to form projection envelopes which can overlap in positive or in negative, so as to preferably writing in both a positive and a negative mode ensures a significant improvement in the readability of the road writing and this dynamically with respect to the visibility conditions of the user.
    According to a particularly advantageous variant, the contrast profile of the projected pictogram is reinforced compared to the average light environment of the background beam, on which or in which the pattern is included.
    Indeed, the present invention has a large number of degrees of freedom which makes it possible to adapt to many situations both in terms of visibility conditions and the relevance and management of the information to be projected.
    The present invention thus makes it possible to improve the visibility and the response of the eye to projected information, in particular when it is related to security. The present invention makes it possible to increase the contrast, therefore the visibility, and thus reduce the reaction time of the user, and therefore the braking distance, which therefore increases driving safety.
    To this end, for example, the borders of the pictogram, from the outside of the latter towards the interior and in at least one dimension (width or height) of the projection plane of the pictogram, may have an alternation of at least two zones of different intensity compared to the average intensity of the background beam, a first zone being of stronger or weaker intensity compared to this average intensity and the second zone being respectively of weaker intensity or stronger compared to this average intensity. In an alternative embodiment, the second zone constitutes the heart or central zone of the pictogram and is then bordered at least in one dimension by the first zone.
    Thus, the perception by the driver or third parties of the message constituted by the projected pictogram is reinforced, the reaction time with respect to the projected message is reduced and driving safety is in fact improved.
    For example, in certain circumstances, the information in the pictogram may be more important than the lighting of an area of the road, while in other circumstances, it is preferable to keep very good lighting of the road while projecting a pictogram of lesser importance.
    The use of a highly resolved beam in combination with a lower resolved beam allows the projection of a pictogram with one while controlling the lighting of the projection area of the pictogram with the other. It is then possible to control the contrast but also the brightness of the pictogram and this directly depending on the visual comfort of the user for example or any other condition.
    The intensity gradient and the intensity level applied may be constant or vary along the pattern in a direction of the projection dimension considered (width or height, for example from left to right respectively or from bottom to bottom high, corresponding to a near field projection of the vehicle towards the horizon).
    In addition, this variation can be static or dynamic, that is to say controlled as a function of the environment of the vehicle: for example, as a function of the imminence of an event, the contrast can be dynamically reduced or enhanced, so as to generate a ripple effect of the pattern which will appear more or less clear in the background beam and to draw the attention of the driver or third parties to the imminence of the event corresponding to the projected pictogram (arrow exit or turn, collision alert, pedestrian crossing, etc.).
    The present invention thus further improves driving safety.
    The present invention thus makes it possible to ingeniously couple the advantages of two light sources whose pixelation is different in order to meet all the lighting needs.
    Indeed, the present invention proposes to use the advantages of two distinct technologies in order to combine the advantages of each in a single lighting system.
    The present invention also relates to a vehicle equipped with at least one system according to the present invention.
    Such a vehicle provides the driver with comfort in reading road writing, as well as intelligent management of projected information relating to environmental parameters for example.
    The present invention also relates to a lighting method for a vehicle comprising at least one lighting system according to the present invention, said method comprising at least the following steps:
    o Measurement by at least one sensor of at least one operating parameter;
    o Reception by at least one control electronics of said measurement; o Sending by said at least one electronic control unit of at least one first activation and / or deactivation signal of at least part of a matrix of light elements included by at least one first projection device;
    o Sending by said at least one electronic control unit, intended for at least a second projection device, of at least a second projection signal of at least one pictogram selected from a plurality of pictograms in at least one data as a function of said at least one measurement.
    Such a method allows the implementation of the present invention at the level of a computer system comprising at least one processor, instructions contained in at least one non-transient memory, and at least one sensor of an external parameter, environmental for example. , or position.
    BRIEF DESCRIPTION OF THE FIGURES
    The aims, objects, as well as the characteristics and advantages of the invention will become more apparent from the detailed description of an embodiment of the latter which is illustrated by the following accompanying drawings in which:
    - Figure 1 illustrates a lighting system according to an embodiment of the present invention comprising a first projection device 200 and a second projection device 300.
    - Figure 2 illustrates, according to one embodiment of the present invention, the projection of a pictogram 370 by the second projection device 300 according to a positive projection mode in an area 261 illuminated by the first projection device 200. In this figure the inner area 371 of the pictogram 370 is said to be projected overprinted with the first projection envelope 260 of the first projection device 200, and the outer area 361 of the pictogram 370 is said to be projected in "under printing" since it is not not actually planned. The second projection envelope 360, generated by the second device 200, is thus shaped to define only the pictogram 370 and therefore has an unlit area corresponding to the outside area 361 of the pictogram 370.
    - Figure 3 illustrates, according to one embodiment of the present invention, the projection of a pictogram 370 by the second projection device 300 according to a negative projection mode in an area 261 illuminated by the first projection device 200. In this figure the outer zone 361 of the pictogram 370 is said to be projected overprinted with the first projection envelope 260 of the first projection device 200, and the inner zone 371 of the pictogram 370 is said to be projected in "under printing" since it is not not actually planned. The second projection envelope 360 generated by the second device 200 is thus shaped to define only the periphery of the pictogram 370 and therefore has an unlit area corresponding to the interior area 371 of the pictogram 370.
    FIG. 4 illustrates, according to an embodiment of the present invention, the projection of a pictogram 370 by the second projection device 300 according to a positive projection mode in an area 271 not lit by the first projection device 200, in other words in a zone of lesser illumination, or even of non-illumination, of the first projection envelope 260 of the first projection device 200. The zone 271 is defined by a projection sub-envelope 270 generated by the first projection device 200 and belongs to the first projection envelope 260. In this figure the interior area 371 of the pictogram 370 is illuminated by the second projection device 200. The second projection envelope 360, generated by the second device 200, is thus shaped so as to define only the pictogram 370 and therefore has an unlit area corresponding to the outside area 361 of the pictogram 370.
    FIG. 5 illustrates, according to one embodiment of the present invention, the projection of a pictogram 370 by the second projection device 300 according to a negative projection mode in an area 271 not lit by the first projection device 200, in other words in a zone of lesser illumination, or even of non-illumination, of the first projection envelope 260 of the first projection device 200. The zone 271 is defined by a projection sub-envelope 270 generated by the first projection device 200 and belongs to the first envelope 260. In this figure the outer zone 361 of the pictogram 370 is illuminated by the second projection device 200. The second projection envelope 360 generated by the second device 200, is thus shaped to define only the periphery of the pictogram 370 and therefore has an unlit area corresponding to the interior area 371 of pictogram 370.
    The accompanying drawings are given as examples and are not limitative of the invention. These drawings are schematic representations and are not necessarily to the scale of practical application.
    In order to represent the present invention in a simple diagrammatic manner, FIGS. 2, 3, 4 and 5 represent only one case of implementation of the present invention corresponding to a lighting of the road coming from the center of the vehicle and not from the sides. , this in order to simplify the graphic representation of the drawings. The present invention naturally applies to the case of a vehicle equipped with a lighting system oriented towards the front of the vehicle to the right and / or to the left relative to the axis of the main dimension of the vehicle.
    DETAILED DESCRIPTION OF THE INVENTION
    In the following description, similar reference numerals will be used to describe similar concepts through different embodiments of the invention.
    Unless otherwise specified, technical characteristics described in detail for a given embodiment may be combined with technical characteristics described in the context of other embodiments described by way of example and not limitation.
    In general, the present invention can use light sources of the light-emitting diode type also commonly called LEDs. In particular, these LEDs can be provided with at least one chip capable of emitting light of advantageously adjustable intensity according to the lighting and / or signaling function to be performed. There may be several sources as will be discussed in more detail below. Furthermore, the term light source here means a set of at least one elementary source such as an LED capable of producing a flux leading to generate at the output of the device of the invention at least one output light beam filling at minus a desired function. LED sources are particularly advantageous for making arrays and for strip lighting. Other types of sources are also possible in the invention, such as one or more laser sources, in particular for micro-mirror devices.
    In the characteristics set out below, the terms relating to verticality, horizontality and transversality, 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, in an orientation perpendicular to the plane of the horizon for the term “vertical”, and in 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 considered here as a minor variation around the two preferred directions.
    The term "bottom" or lower part generally means a part of an element of the invention situated, in a vertical plane, below the optical axis. The term “top” or upper part is understood to mean a part of an element of the invention situated, in a vertical plane, above the optical axis. The term "parallel" or the concept of merged axes or lines is understood here in particular with the manufacturing or mounting tolerances, substantially parallel directions or substantially merged axes fall within this framework.
    In the following description, the term “matrix” means a table comprising a certain number of rows and a certain number of columns. Thus, a so-called (n, p) matrix is an array with n rows and p columns. A matrix is then said to be square if its number of rows is equal to its number of columns. A matrix is said to be vertical if its number of rows is greater than its number of columns. A matrix is said to be horizontal if no number of rows is less than its number of columns. In the present description, a line is understood to be advantageously horizontal according to the definition of this term given previously, and a column is understood to be advantageously vertical according to the definition of this term given previously.
    The term "pixelated light source" or its equivalents has the definition of a light source comprising a plurality of light emitting devices, such as an array of LEDs for example, each light emitting device being controllable independently of the other light emitting devices. It is therefore a plurality of light sources forming a pixelated light source.
    The term "pixelated light beam" or its equivalents has the definition of a light beam being formed of a plurality of light beams, each light beam can be controlled independently of the other light beams. This type of pixelated light beam can for example be produced by micro-mirror matrix type systems, liquid crystal devices, or a digital light processing (DLP) technology in Anglo-Saxon terms. ), or by one or more pixelated light sources, for example to control the color of the pixelated light beam (s). Each independently controllable sub-beam forms a pixelated beam. Unlike a pixelated light source, a pixelated light beam can include a single light emitting device and not a plurality.
    The terms "envelope", "projection envelope" or their equivalents have for definition a virtual surface defining a volume of space comprising one or more light beams emitted from a single projection device. Thus, each projection device corresponds to a projection envelope in which is registered the beam (s) to be projected.
    A projection surface or area is defined as being a surface delimited by the intersection between a projection envelope and a decoration (surrounding the vehicle like a part of the roadway or a shoulder), for example the decoration facing the vehicle . Thus a projection area has for definition the surface that can be illuminated by a projection device considered.
    The term "recovery rate" or its equivalents has as its definition the ratio of the surface, or the area, which can be illuminated and common, or the volume which can be illuminated and common, to two projection envelopes, with the most total area small, or the smallest total volume, corresponding to either of the projection envelopes. This rate is equal to 100% in the case where the smallest surface, or area, which can be illuminated by one of the two projection devices is completely included in the surface which can be illuminated by the other projection device. This recovery rate is therefore between 0% and 100%.
    By “pictogram” or its equivalents is meant a figurative or symbolic design or motif reproducing the content of a message without referring to its linguistic form, it can thus be an arrow, a symbol derived from the code of the route, an icon or any other form representative of information. For example, a pictogram can thus be informative, or more functional, such as lines reconstructed by lighting, but it can also take more cognitive forms.
    Before starting a detailed review of embodiments of the invention, there are set out below optional features which can optionally be used in combination or alternatively:
    - Said at least one second projection device is configured to project said at least one pictogram according to at least one positive projection mode corresponding to a light projection of an interior area of said at least one pictogram.
    This makes it possible to have a so-called positive projection mode where the second projection envelope corresponds to the pictogram. In addition, by controlling the first projection device, it is possible to combine this positive projection mode with the lighting or not of a projection area of the first projection envelope in order to more precisely control the contrast and the quality of display of the pictogram.
    - Said at least a first projection device is configured to cooperate with said at least one second projection device so as to produce an illumination of at least part of said at least one overlap zone when said at least one pictogram is projected by said at least one second projection device according to said at least one positive projection mode.
    - Said at least a first projection device is configured to cooperate with said at least one second projection device so as to produce less lighting, preferably an absence of lighting, of at least part of said at least one area overlap with respect to the lighting of the interior zone of said at least one pictogram, when said at least one pictogram is projected by said at least one second projection device according to said at least one positive projection mode, and by producing lighting in at least part of said at least one first projection envelope outside the interior zone of said at least one pictogram.
    - Said at least one second projection device is configured to project said at least one pictogram according to at least one negative projection mode corresponding to a light projection of an outside area of said at least one pictogram.
    This then makes it possible to have a so-called negative projection mode where the periphery of the pictogram is projected. In addition, by controlling the first projection device, it is then possible to combine this negative projection mode with the lighting or not of a projection area of the first projection envelope in order to more precisely control the contrast and the quality of display of the pictogram.
    - Said at least a first projection device is configured to cooperate with said at least one second projection device so as to produce an illumination of at least part of said at least one overlap zone when said at least one pictogram is projected by said at least one second projection device according to said at least one negative projection mode.
    - Said at least a first projection device is configured to cooperate with said at least one second projection device so as to produce less lighting, preferably an absence of lighting, of at least part of said at least one area overlap with respect to the lighting of the external zone of said at least one pictogram, when said at least one pictogram is projected by said at least one second projection device according to said at least one negative projection mode, and by producing lighting in at least part of said at least one first projection envelope outside the outside area of said at least one pictogram.
    - Said at least one first projection device is configured to illuminate or not illuminate certain projection areas of said at least one first projection envelope.
    This makes it possible to illuminate certain areas of the road or not and thus to provide an additional degree of freedom making it possible to adjust the visibility of the pictogram projected on an area depending on whether it is lit or not, the projection of the pictogram being able to be positive or negative.
    - Said at least a first projection device comprises at least one matrix of light elements configured to form said at least one pixelated light source.
    This makes it possible to have a plurality of light sources defining a matrix so as to divide the projection envelope of the first projection device into several projection zones.
    - Said at least one matrix of light elements is a matrix the number of columns of which is greater than or equal to the number of rows.
    - Said at least one matrix of light elements comprises at least 2 light elements, preferably at least 8 light elements, and advantageously at least 100 light elements.
    - Said light elements of said at least one matrix are configured to be individually controlled.
    This makes it possible to have a plurality of light sources defining a matrix so as to divide the projection envelope of the first projection device into projection zones.
    - Said at least one second projection device comprises at least one first matrix of micro-mirrors configured to form said at least one pixelated light beam from at least one light source.
    This makes it possible to have a highly pixelated beam of light and thus to project a pictogram and / or the outline of a pictogram depending on whether the positive or negative projection mode is used.
    - Said at least a second projection device comprises at least a second matrix of micro-mirrors.
    This makes it possible to have two highly pixelated light beams, one which can be used for the projection of a pictogram for example, and the other for the projection of low beams for example, or else to increase the resolution and / or the size of a projected pictogram, or to project two pictograms simultaneously.
    - Said at least a first matrix of micro-mirrors and said at least one second matrix of micro-mirrors are configured to form said at least one pixelated light beam.
    This increases the resolution of the projected pictogram.
    - Said at least a first matrix of micro-mirrors and said at least one second matrix of micro-mirrors are configured to respectively form at least a first pixelized light sub-beam and at least a second pixelized light sub-beam, said at least a first pixelated light sub-beam and said at least one second pixelized light sub-beam being configured to form said at least one pixelated light beam.
    This makes it possible to have two highly pixelated beams of light, one which can be used for the projection of a pictogram for example, and the other for the projection of low beams for example.
    - Said at least one overlap zone corresponds to a rate of overlap between said at least one first projection envelope and said at least one second projection envelope of between 0% and 100%, advantageously between 30% and 70% and preferably equal to 50%.
    - The number of pixels of said at least one pixelated light source is less than the number of pixels of said at least one pixelated light beam. This provides a lighting system with the advantages of a weakly pixelated light source and a highly pixelated beam. Power and precision are therefore available in order to ensure good visibility of the pictograms projected and this dynamically in relation to the visibility conditions for the driver.
    The ratio between the number of pixels of said at least one pixelated light source and the number of pixels of said at least one pixelated light beam is less than 200, preferably 50, and advantageously 3.
    The ratio between the number of pixels of said at least one pixelated light source and the number of pixels of said at least one pixelated light beam is between 200 and 3, preferably between 50 and 3, and advantageously equal to 50.
    - Said at least a first projection device and said at least one second projection device each comprise an output diopter. This makes it possible to adapt the output diopter to the optical characteristics of the device considered.
    - Said at least a first projection device and said at least one second projection device have a common output diopter.
    This makes it possible to design a compact and simple lighting system.
    - Said at least a first projection device is controlled by control electronics so as to control said at least one pixelated light source according to at least one operating parameter.
    The control electronics thus allow full use of all the degrees of freedom authorized by the present invention.
    - Said at least one second projection device is controlled by control electronics so as to modify said at least one second projection envelope according to at least one operating parameter. This control electronics makes it possible to modify the reflection properties of the matrix of micro-mirrors in order to adapt them to lighting needs.
    - Said at least one second projection device is controlled by control electronics so as to modify said at least one pictogram according to at least one operating parameter.
    - Said at least one operating parameter is at least one parameter taken from: detection of change of direction of the road, detection of location data, detection of precipitation, detection of the brightness of the environment of the road, detection of vehicle being followed, detection of crossed vehicle, detection of imminent danger, detection of object crossing in front of the vehicle (for example: pedestrian, animals), detection of work area, detection of traffic signs, detection of deceleration, detection of accident, detection of weather conditions, detection of other road users.
    This makes it possible to control the projection devices as a function of external parameters and thus to optimize the display of pictograms on the road according to road conditions, but also to define the type of pictogram to be projected also according to the conditions of roads for example.
    - Said at least one pictogram is taken from: an arrow, a word, horizontal or vertical lines, animated patterns, dynamic projections. This makes it possible to display various types of information on the road intended for the user but also for any person capable of viewing the pictogram.
    The present invention finds a preferred field of application in the automotive industry, for vehicle equipment, in particular for the production of lighting devices.
    The present invention in fact allows better precision and more degrees of freedom in road writing. Road writing is more than ever an aspect put forward by many manufacturers of automotive equipment. The new technologies developed in recent years make it possible to project information on the road for the driver but also for other users. However, as discussed before, the current solutions have advantages relative to the old lighting technologies but at the same time also present lower performance in other fields, in situations where the writing of road is not necessary for example, or when visibility conditions make it difficult to read the route writing of current systems.
    Thus in order to at least partially solve these problems, the present invention advantageously proposes an ingenious lighting system benefiting from the advantages of a plurality of technologies, combined together in an innovative architecture thus ensuring all the functions including a system of lighting may be required while having additional degrees of freedom to meet the conditions of visibility, readability and driving.
    Reconciling old and new technologies is never easy, and the present invention offers a solution as new as it is inventive in order to meet the lighting requirements of today, yesterday and tomorrow.
    We will now describe the present invention through FIGS. 1 to 5 serving as nonlimiting examples in order to illustrate certain embodiments of the present invention.
    FIG. 1 illustrates, according to an embodiment of the present invention, a first device 200 for projecting a pixelated light source 220, and a second device 300 for projecting a pixelated light beam 320.
    In the present invention, as indicated above, a pixelated light source is distinguished from a pixelated light beam in the sense that the pixelation of the pixelated light source comes from the fact that it comprises a plurality of light emitters, whereas, conversely, the pixelation of the pixelated light beam comes from the fact that it comprises a plurality of light beams even though this plurality of light beams comes from a single non-pixelated light source.
    As illustrated by the embodiment of FIG. 1, the first projection device 200 can comprise at least one matrix 210 of light elements 211 and at least one output diopter 230 configured to conform the pixelated light 220 emitted by the matrix 210 of light elements 211 so as to define a first projection envelope 260. Advantageously, this output diopter 330 can be a converging lens for example.
    Advantageously, the light elements 211 are LEDs or any other type of light emitters, preferably individually controllable.
    According to one embodiment, the length of the matrix 210 of light elements 211, that is to say the number of columns which it comprises, is between 2 and 100, preferably between 10 and 50 and advantageously equal to 10.
    According to one embodiment, the width of the matrix of 210 of light elements 211, that is to say the number of lines which it comprises, is between 2 and 100, preferably between 10 and 50 and advantageously equal to 10.
    Preferably, the matrix 210 of light elements 211 is a horizontal matrix, that is to say comprising a number of columns greater than its number of rows.
    According to one embodiment, the pixelated light source can also comprise or consist of separate modules each consisting of a light source, each having their output diopter and each being independently controllable.
    Preferably, each light element 211 of the matrix 210 can be controlled individually by control electronics as a function of at least one operating parameter. This control may consist in the variation of the light intensity, which may be zero, produced by one or more light elements 211, or the positioning of a cover or of all types of element making it possible to reduce the brightness of the light produced. by one or more light elements 211, and / or to interrupt the path of the light from one or more light elements 211 to the output diopter 230, or more generally to the outside of the vehicle. The control of the matrix 210 is described in the following of this description.
    Advantageously, the control of the matrix 210 makes it possible to conform the first projection envelope 260 and by the same token a first projection area. In fact, controlling the matrix 210 makes it possible to produce lighting and / or less lighting, or even an absence of lighting, of at least part of the first projection area delimited by the first projection envelope 260. It it is thus possible, for example, to turn off or reduce the light intensity of the light elements 211 of the matrix 210 so as to reduce the lighting, or even cut it, of only a portion of the projection envelope 260, and therefore of the projection area. In FIGS. 2 to 5, the illuminated zone of the first projection envelope 260 is referenced 261, while the area of lesser lighting, or even of non-illumination, of the first projection envelope 260 is referenced 271, and can be defined by a projection sub-envelope 270.
    The present invention allows, by this control, the lighting or not of certain parts of the decoration, of the landscape, being in front of the vehicle for example.
    As illustrated by the embodiment of FIG. 1, the second projection device 300 may comprise at least one DMD, that is to say a micromirror device, also called a micro-mirror matrix 350 and at least one output diopter 330 configured to conform the pixelated light beam 320 formed by the array of micro-mirrors 350 so as to define a second projection envelope 360.
    This second projection device 300 comprises at least one light source 310, which may for example be at least one LED or at least one laser diode, or any kind of light sources. This light source 310 emits a light beam advantageously in the direction of a reflector 340. This reflector 340 is preferably configured to concentrate the flow of incident light on a surface comprising the matrix of micro-mirrors 350.
    Advantageously, the reflector 340 is configured so that all of the micro-mirrors 350 are illuminated by the light beam reflected by the reflector 340. The reflector 340 may have, in at least one section plane, a pseudo-elliptical profile or pseudo parabolic.
    According to one embodiment, the length of the array of micro-mirrors 350, that is to say the number of columns which it comprises, is between 2560 and 864, preferably between 2560 and 864 and advantageously equal to 1150.
    According to one embodiment, the width of the array of micro-mirrors 350, that is to say the number of lines which it comprises, is between 1600 and 480, preferably between 1150 and 480 and advantageously equal to 1150.
    Once reflected by at least part of the micro-mirrors 350, the light beam passes through an output diopter 330. Advantageously, this output diopter 330 can be a converging lens for example.
    As indicated, after reflection of the light beam on the reflector 340, it comes to focus on the array of micro-mirrors 350. Preferably, the micro-mirrors each have two operating positions, a so-called active position in which they reflect the incident light beam in the direction of the output diopter 330, and a so-called passive position in which they reflect the incident light beam in the direction of a light-absorbing element not shown in FIG. 1. Preferably, each micromirror of the matrix of micro-mirrors 350 can be controlled individually by control electronics as a function of at least one operating parameter. The control of the matrix of micro-mirrors 350 is described in the following of this description
    This second projection device 300 makes it possible to have, at the output of the output diopter 330, a highly resolved and pixelated light beam so that each pixel or pixelized ray making up this beam corresponds to a micro-mirror, it is then possible to activate or not these micro-pixels by simply driving the micro-mirrors 350. This particularity then makes it possible to control, if necessary, the shape of the light beam at the output of the output diopter 330 according to the needs of the invention.
    Advantageously, the present invention makes it possible to carry out a route writing, it is the projection in the field of vision of the driver of a pictogram 370. This projection can be carried out at the level of the route 400, on the side, at above or below the horizon, for example not limiting. The piloting of the micro-mirrors 350 makes it possible to draw high resolution pictograms 370, the resolution of the pictogram 370 being directly equal to the number of micro-mirrors 350 activated to draw it, that is to say in the active position.
    When the second projection device 300 is used to project a pictogram 370, some of the micro-mirrors are in the passive position and others in the active position.
    By positive projection mode is meant the case where the inner zone 371 of the pictogram 370 corresponds to the micro-mirrors in the active position and where the outer zone 361 of the pictogram 370 corresponds to the micro-mirrors in the passive position. This means that only the interior of the pictogram 370 is projected by the second projection device 300, the second projection envelope 360 is thus shaped to define only the pictogram 370 and therefore has an unlit area corresponding to the outside area 361 of the pictogram 370. This situation is particularly well illustrated by Figures 2 and 4 described in the following description.
    By negative projection mode is meant the case where the outer zone 361 of the pictogram 370 corresponds to the micro-mirrors in the active position and where the inner zone 371 of the pictogram 370 corresponds to the micro-mirrors in the passive position. This means that only the periphery of the pictogram 370 is projected by the second projection device 300, the second projection envelope 360 is thus shaped to define only the periphery of the pictogram 370 and therefore has an unlit area corresponding to the interior area 371 of the pictogram 370. This situation is particularly well illustrated by Figures 3 and 5 described in the following description.
    In a particularly advantageous manner, the great dynamics of the micromirrors 350, as well as their high density, make it possible to quickly form pictograms 370 of high resolution. Each micro-mirror in the active position is a pixel of the pictogram 370 projected, whether in the positive mode relative to the interior area 371 of the pictogram 370, as in the negative mode relative to the exterior area 361 of the pictogram 370.
    These two modes are discussed at greater length and illustrated below through Figures 2 to 5.
    According to one embodiment, the second projection device 300 comprises a first matrix of micro-mirrors and a second matrix of micro-mirrors. These two arrays of micro-mirrors are for example configured to respectively form at least a first pixelized light sub-beam and at least a second pixelized light sub-beam.
    Advantageously, the first pixelated light sub-beam and the second pixelized light sub-beam are configured to form said pixelized light beam 320.
    According to one embodiment, each of the two arrays of micro-mirrors has an output diopter.
    According to another embodiment, the two arrays of micro-mirrors have at least one output diopter in common.
    The use of two arrays of micro-mirrors brings to the present invention many additional degrees of freedom. In fact, this second matrix of micro-mirrors can allow, for example, the following situations:
    o The first matrix of micro-mirrors can be used to project pictograms when the second matrix of micro-mirrors can be used for the projection of low beams;
    o The two matrices of micro-mirrors can be used together in order to create larger pictograms;
    o An offset between the pixelated light beams can be applied as well as color or polarization filters so as to produce a three-dimensional pictogram, each sub-beam serving as a reference for a distinct eye of the user;
    o Each of the two micro-mirror arrays can project a different pictogram from one another.
    o Each of the two arrays of micro-mirrors can occupy half of the projection space 260, whether according to the horizontal or vertical dimension;
    o Each of the two micro-mirror arrays can project a distinct color, for example a white beam and a color beam, advantageously green.
    According to a preferred embodiment of the present invention, the first projection envelope 260 defined by the pixelated light source 220, and the second envelope 360 defined by the pixelated light beam have at least one overlap zone one with the 'other. This overlap can be defined according to two equivalent representations: one three-dimensional and the other two-dimensional.
    The three-dimensional approach consists in defining the overlap zone as a volume of space belonging both to the volume of space defined by the first projection envelope 260 and at the same time belonging to the volume of space defined by the second envelope 360 projection.
    The two-dimensional approach consists in illustrating this overlap zone as a two-dimensional surface, it is in fact a surface lit both by the first projection device 200 and by the second projection device 300.
    Advantageously, this overlap zone is located in the center of the largest illuminated zone among the zone illuminated by the first projection device 200 and the zone illuminated by the second projection device 300.
    The recovery rate, according to its definition given above, is therefore between 100% and 0%, preferably between 60% and 20% and advantageously between 50% and 30%.
    Preferably, the first projection device 200 illuminates a larger area than the area illuminated by the second projection device 300.
    According to a preferred embodiment, the entire projection envelope 360 of the second projection device 300 is included in the projection envelope 260 of the first projection device 200. The recovery rate is then equal to 100%.
    According to one embodiment, the first projection device 200 and the second projection device 300 use a common output diopter. This embodiment makes it possible to increase the compactness of the present lighting system as well as its robustness.
    We will now describe FIGS. 2 to 5 illustrating, according to an embodiment of the present invention, four situations of projection of a pictogram 370 by the second projection device 300 in cooperation with the first projection device 200.
    In FIG. 2, the vehicle 100 moving on a road 400 comprises a first projection device 200 and a second projection device 300.
    The projection zone 261 corresponds to the total projection surface that can be illuminated by the first projection device 200, this zone is defined by the first projection envelope 260.
    The total projection area defined by the addition of areas 361 and 371 corresponds to the total projection area that can be illuminated by the second projection device 300, this area is defined by the second projection envelope 360.
    FIG. 2 illustrates the case of a positive projection mode of a pictogram 370 by the second projection device 300. It is therefore a situation where the interior area 371 of the pictogram 370 is projected by the second device 300 , and where the outer area 361 of the pictogram 370 is not projected, that is to say that it is not lit.
    In the case of FIG. 2, the coverage rate of the projection area 261 of the first projection device 200 with the interior area 371 of the pictogram 370 is equal to 100%. In fact, the pictogram 370 is fully projected into the projection area 261 of the first projection device 200.
    As indicated above, and described below, the first projection device 200 can be controlled so as to form areas of lower light, or even of non-light.
    The situation represented by FIG. 2 corresponds to a projection in positive mode of a pictogram 370 by the second device 300 into the projection area 261 lit by the first device 200. The pictogram 370 is projected onto an already lit area.
    This embodiment thus allows the present invention to project a pictogram 370 into an already lit area 261 so as not to lose the lighting of the route 400 while projecting information therein in the form of a pictogram 370.
    This situation can for example be particularly interesting in the case where the pictogram 370 projected is a pictogram corresponding to information of less importance relative to the lighting of route 400, or even in the case where the weather conditions make this embodiment is the most suitable for enabling the driver to correctly visualize the projected pictogram 370.
    For example, the pictogram 370 can be an arrow going towards the front of the vehicle 100 so as to reinforce the lighting of the road 400 in a specific area so that the driver can focus particularly on this area.
    The pictogram 370 may have the function of displaying information, but also of reinforcing the lighting according to a particular geometrical shape so as to increase the driver's concentration in this area of route 400.
    FIG. 3 illustrates the case of a negative projection mode of a pictogram 370 by the second projection device 300. It is therefore a situation where the external area 361 of the pictogram 370 is projected by the second device 300 , and where the interior area 371 of the pictogram 370 is not projected, that is to say that it is not lit.
    In the case of FIG. 3, the coverage rate of the projection area 261 of the first projection device 200 with the outside area 361 of the pictogram 370 is equal to 100%. Indeed, the outline of the pictogram 370 is fully projected into the projection area 261 of the first projection device 200.
    The situation represented by FIG. 3 corresponds to a projection in negative mode of a pictogram 370 by the second device 300 in the projection area 261 lit by the first device 200. The negative image of the pictogram 370 is projected onto an area already lit.
    This embodiment thus allows the present invention to project a negative image of a pictogram 370 in an already lit area so as not to lose the lighting of the route 400 while projecting information therein in the form of a pictogram 370.
    As in the case of FIG. 2, this situation can, for example, be particularly interesting in the case where the pictogram 370 projected in negative is a pictogram corresponding to information of less importance relative to the lighting of route 400, or else in case the weather conditions make this embodiment the most suitable for enabling the driver to correctly visualize the projected pictogram 370, and this according to the negative projection mode.
    In certain lighting situations on route 400, whether due to the weather or public lighting of route 400, projection in the negative mode of pictogram 370 can provide the driver with better visibility of pictogram 370 and / or the interior area of pictogram 370.
    In FIG. 4, the vehicle 100 moving on a road 400 comprises a first projection device 200 and a second projection device 300.
    As before, the projection area 261 corresponds to the total projection area that can be illuminated by the first projection device 200, this area is defined by the first projection envelope 260.
    However, in the case of FIG. 4, a projection area 271 of lesser illumination, preferably of non-illumination, defined by the sub-envelope 270 is shown. This non-lighting projection area 271 corresponds to a lighting area whose corresponding light elements 211 of the first projection device 200 are controlled so as to reduce the brightness of the light they emit, or even cut it, for example. In the case of a cut, electronic and / or mechanical, of the light emission of these light emitters, the projection area 271 is then without lighting. The projection sub-envelope 270 then defines a dark zone in the projection zone 261 of the first projection device 200.
    Advantageously, the projection zone 271 can be any of the zones belonging to the projection zone 261 defined by the first envelope 260. In fact, the first envelope 260 defines a volume in which the sub-envelope 270 is contained. defining the projection area 271.
    Thus, the projection area 271 can be at least zero and at most equal to the projection area 261.
    As in the case of FIG. 2, the total projection area defined by the addition of areas 361 and 371 corresponds to the total projection area that can be illuminated by the second projection device 300.
    In FIG. 4, similar to FIG. 2 above, the projection mode is a positive projection mode of a pictogram 370 by the second projection device 300. It is therefore the situation where the interior zone 371 of the pictogram 370 is projected by the second device 300, and where the outer area 361 of the pictogram 370 is not projected, that is to say that it is not lit.
    In the case of FIG. 4, the coverage rate of the projection area 261 of the first projection device 200 with the interior area 371 of the pictogram 370 is equal to 0%. Indeed, the pictogram 370 is fully projected into the projection area 271 of the first projection device 200 corresponding to the non-lighting area.
    In the case where the projection area 271 is simply of less light, the recovery rate would again be equal to 100%. But in the case of FIG. 4, the area 271 is not illuminated by the first projection device 200.
    As indicated above, the first projection device 200 can be controlled so as to form unlit areas.
    The situation represented by FIG. 4 corresponds to a projection in positive mode of a pictogram 370 by the second device 300 in the projection area 271 not lit by the first device 200. The pictogram 370 is projected onto an area of the road not illuminated by the first projection device 200.
    This embodiment thus allows the present invention to project a pictogram 370 in a dark area so as to reinforce its contrast, and to make the pictogram 370 much more visible to the driver.
    This situation can for example be particularly interesting in the case where the pictogram 370 projected is a pictogram corresponding to information of high importance relative to the lighting of the route 400, or even in the case where the weather conditions make this embodiment is the most suitable for enabling the driver to correctly visualize the projected pictogram 370.
    For example, the pictogram 370 may be an arrow going to the right relative to the vehicle 100 so as to indicate precisely to the driver that he must turn right at the next intersection. This information can also be a signal of the authorized speed for example so as to indicate to the driver to reduce his speed according to the regulations.
    For example, a vehicle location system 100 can determine the position of the vehicle 100 relative to a section of the road 400 and detect, from a database, the regulations in terms of speeds, for example, and project directions to the driver. information relating to these regulations in the form of pictograms 370.
    FIG. 5 illustrates the case of a negative projection mode of a pictogram 370 by the second projection device 300. As in the case of FIG. 3, this is the situation where the outer zone 361 of the pictogram 370 is projected by the second device 300, and where the interior area 371 of the pictogram 370 is not projected, that is to say that it is not lit.
    In the case of FIG. 5, the coverage rate of the projection area 261 of the first projection device 200 with the outside area 361 of the pictogram 370 is equal to 0%. Indeed, the outline of the pictogram 370 is fully projected into the projection area 271 which is not illuminated by the first projection device 200.
    The situation represented by FIG. 5 can also correspond to a projection in negative mode of a pictogram 370 by the second device 300 in the projection area 271 of lower light.
    This embodiment thus allows the present invention to project a negative image of a pictogram 370 into an unlit area of the road so as to enhance its contrast, and to make the pictogram 370 much more visible to the driver.
    As in the case of FIG. 4, this situation can, for example, be particularly interesting in the case where the pictogram 370 projected in negative is a pictogram corresponding to information of high importance relative to the lighting of route 400, or else in case the weather conditions make this embodiment the most suitable for enabling the driver to correctly visualize the projected pictogram 370, and this according to the negative projection mode.
    In certain lighting situations of route 400, whether due to weather conditions or public lighting of route 400, projection in the negative mode of pictogram 370 can provide the driver with better visibility of pictogram 370 and / or the interior area of pictogram 370.
    Advantageously, the present invention is configured so as to allow the dynamic transition from one embodiment to another of the present invention. For example, the present invention allows dynamic passage between any of the embodiments illustrated in Figures 2, 3, 4 and 5.
    We have just seen through FIGS. 2 to 5, four different situations of projection of a pictogram 370. It is one of the advantages of the present invention to be able to adapt the projection of a pictogram 370 according to various operating parameters.
    We will now present a non-limiting description of the piloting of the first and of the second projection device.
    According to one embodiment, the first projection device 200 is controlled by control electronics. Advantageously, the electronic control of the first projection device 200 consists in shaping the first projection envelope 260.
    For example, this control makes it possible to reduce the lighting of a part of the projection area 261, or even not to light a part of this projection area 261.
    This control can be carried out directly at the level of the matrix 210 of light elements 211 by reducing the light emission of a part of the light elements 211, or even by stopping the light emission of a part of the light elements 211.
    This control can also be achieved by introducing a filter, or even an opaque mask, between a portion of the light elements 211 and the projection area 261, before or after the output diopter 230.
    Advantageously, the first projection device 200 is controlled by control electronics so as to control the pixelated light source according to at least one operating parameter. This operating parameter will be described later in this description.
    The control electronics allow the first projection device 200 to be controlled so as to create lighting zones, and / or zones of dim light, and / or unlit zones.
    The pixelated light source 220 of the first projection device 200 is controlled by the control electronics so as to control each pixel making up said pixelized light source, whether or not individually.
    According to another embodiment, the second projection device 300 is controlled by control electronics. Advantageously, the electronic control of the second projection device 300 consists in shaping the projection envelope 360.
    For example, this control makes it possible to reduce the lighting of a part of the 360 projection area, or even not to illuminate part of this 360 projection area.
    This control can be carried out directly at the level of the micro-mirror array 350 by positioning a part of the micro-mirrors in an active or passive position.
    This control can also be achieved by introducing a filter, or even an opaque mask, between a portion of the micro-mirrors and the projection area 360, before or after the output diopter 330.
    Advantageously, the reflection properties of the micro-mirrors of the matrix of micro-mirrors 350 can be controlled by the control electronics.
    According to another embodiment, this electronic control can also be carried out upstream of the array of micro-mirrors 350, at the level of the light source of the second projection device 300 for example or also at the level of the reflector 340. This control can for example correspond to a reduction in the light intensity of the light source 310 of the second projection device 300.
    Advantageously, the second projection device 300 is controlled by control electronics so as to control, according to at least one operating parameter, the pictogram 370 projected, as well as its projection mode: positive or negative.
    Preferably, the first projection device 200 and the second projection device 300 are controlled by the same control electronics. This thus allows greater compactness of the control system and also better cooperation between the first projection device 200 and the second projection device 300 in their control.
    We will now describe the operating parameter or parameters influencing the control of the first projection device 200 and / or the control of the second projection device 300.
    Advantageously, the operating parameter corresponds to a plurality of operating parameters, such as, for example, pre-programmed environmental parameters or even user parameters.
    According to one embodiment, certain operating parameters can be derived from measurements made by sensors, such as for example weather sensors, position sensors, speed sensors, light sensors, camera, radar, lidar, GPS ( Global Positioning System), data feeds, RSS feeds, Wi-Fi, Smartphone, Cloud data, etc.
    The operating parameters can be of different types, such as for example environmental parameters which can relate to the visibility of the road, the weather conditions, ... etc ... and the preprogrammed parameters like those coming from a database of pictograms, vehicle navigation system, motorization system, communication system, etc.
    According to one embodiment, the operating parameters can be interdependent, for example wet route information can lead to the choice of a precise pictogram in a pictogram database so as to modify the matrix of micro-mirrors for example and to project the pictogram corresponding to the identified situation while adapting, if necessary, the projection envelope of the first projection device.
    Advantageously, the environmental parameters can be measured by sensors included in the vehicle or not, or directly come from computer data from a communication network for example, such as the Internet.
    Preferably, the preprogrammed parameters come from the vehicle management system such as the speedometer, the position of the vehicle relative to a destination, ... etc ...
    According to one embodiment, the operating parameter can be a geo-positioning parameter, such as the detection of a change in direction of the road, or of the route to be followed. For example, in the case where the driver uses a GPS type navigator, the present invention can be configured so that the pictogram 370 projected by the second projection device 300 is an indication of the route to follow, an arrow for example, a distance, or any other element allowing the driver to be guided without taking his eyes off the road.
    According to another embodiment, the operating parameter can be location data, such as a distance between the vehicle and a destination, or even the distance separating the vehicle from the preceding vehicle.
    According to yet another embodiment, the operating parameter can be at least one meteorological parameter. The present invention can, for example, detect particular climatic conditions, indicate them to the driver via pictograms projected at the front of the vehicle, but also adapt the projection of said projected pictograms, and this automatically according to said measured and / or determined conditions.
    The control electronics advantageously allows control of all the degrees of freedom of the present invention.
    In a particularly advantageous manner, the present invention includes numerous degrees of freedom in the projection of pictograms on the road so that it can preferably be automatically adapted to many very variable visibility conditions. The contrast but also the precision of the projected pictogram have a very large dynamic range in order to satisfy the widest range of visibility conditions.
    The present invention adapts as well to the visibility conditions as to the type of pictograms projected so as to adapt the visibility of the pictogram both according to the visibility conditions of the driver but also the importance and the content of the information indicated by said pictogram.
    The present invention thus also relates to a lighting method for a vehicle. This process preferably includes at least the following steps:
    o Measurement by at least one sensor of at least one operating parameter;
    o Reception by at least one control electronics of said measurement; o Sending by said at least one electronic control unit of at least a first activation and / or deactivation signal of at least part of a matrix 210 of light elements 211 included by at least one first projection device 200;
    o Sending by said at least one electronic control unit, intended for at least one second projection device 300, of at least one second projection signal of at least one pictogram 370 selected from a plurality of pictograms in at least one database according to said at least one measurement.
    The present invention thus allows a complete adaptation of its lighting system according to multiple conditions and parameters so as to provide the driver with the best visibility of the pictogram according to its relevance to road conditions.
    According to one embodiment, the present invention benefits from a particular pixelation ratio between the first projection device 200 and the second projection device 300. In fact, advantageously, the first projection device comprises at least 1 light elements 211, preferably at least 8 and advantageously at least 50.
    Preferably, the matrix of micro-mirrors 350 comprises at least 42,000 micromirrors, preferably at least 1,200,000 micro-mirrors and advantageously at least 4,096,000 micro-mirrors.
    According to one embodiment, the pixelated light source can also comprise or consist of separate modules each consisting of a light source, each having their output diopter and each being independently controllable.
    According to one embodiment, the number of light elements 211 of the first projection device 200 is less than the number of micro-mirrors of the second projection device 300.
    This provides a lighting system with the advantages of a weakly pixelated light source and a highly pixelated beam. The present invention thus has the power and precision necessary to ensure good visibility of the pictograms projected and this dynamically with respect to the visibility conditions for the user, and to the nature of the pictograms. The system described can be integrated in whole or in part in a headlight unit, in particular on the front face of the vehicle. The system can include elements divided into at least two groups of elements, the groups of elements each being arranged on a different side of the optical axis. For example, a first group comprises a first projection device and a second projection device in a headlight unit on one side of the vehicle; a second group comprises a first device in a headlight block on the other side of the vehicle; the beams from the first devices are preferably convergent towards the optical axis. The second group can also include a second device for displaying the pictogram in addition to or as an alternative to the projection of the second device from the first group of elements. One or more groups of elements may include additional projection means, for example for carrying out other lighting functions, such as a driving beam.
    According to a separable embodiment, the contrast profile of the projected pictogram is reinforced with respect to the average light environment of the background beam, on which or in which the pattern is included.
    To this end, the borders of the pictogram, from the outside thereof towards the inside and in at least one dimension (width or height) of the projection plane of the pictogram, alternate between at least two zones of different intensity with respect to the average intensity of the background beam, a first zone being of stronger or lower intensity compared to this average intensity and the second zone being respectively of weaker or stronger intensity by compared to this average intensity. In an alternative embodiment, the second zone constitutes the heart or central zone of the pictogram and is then bordered at least in one dimension by the first zone.
    Thus, the perception by the driver or third parties of the message constituted by the projected pictogram is reinforced, the reaction time with respect to the projected message is reduced and driving safety is in fact improved.
    The intensity gradient and the intensity level applied may be constant or vary along the pattern in a direction of the projection dimension considered (width or height, for example from left to right respectively or from bottom to bottom high, corresponding to a near field projection of the vehicle towards the horizon). In addition, this variation can be static or dynamic, that is to say controlled as a function of the environment of the vehicle: for example, as a function of the imminence of an event, the contrast can be dynamically reduced or enhanced, so as to generate a ripple effect of the pattern which will appear more or less clear in the background beam and to draw the attention of the driver or third parties to the imminence of the event corresponding to the projected pictogram (arrow exit or turn, collision alert, pedestrian crossing, etc.). This particular embodiment thus further improves driving safety.
    In a particularly advantageous manner, this variation in gradient is possible by controlling the device for projecting the pixelated light beam.
    For example, in the case of using a DMD, this gradient variation is possible by piloting the micro-mirrors. These can be placed in intermediate positions between the active position and the passive position. These intermediate positions can for example be coded on 8 bits or allow 255 levels of gray. It is thus possible to play on the gray level, therefore the gradient by playing on the time spent by the micro-mirrors in these intermediate states
    The invention is not limited to the embodiments described but extends to any embodiment in accordance with its spirit.
    REFERENCES
    100. Vehicle;
    200. First projection device;
    210. Matrix of light elements;
    211. Light element;
    220. Pixelated light;
    230. Output diopter of the first projection device; to 260. First projection envelope;
    261. Illuminated area of the first projection envelope;
    270. Projection sub-envelope;
    271. Unlit area of the first projection envelope, defined by the projection sub-envelope 270;
    300. Second projection device;
    310. Light source of the second projection device;
    320. Pixelated beam;
    330. Exit diopter of the second projection device;
    340. Reflector;
    350. Array of micro-mirrors;
    360. Second projection envelope;
    361. Exterior area of the Pictogram;
    370. Pictogram;
    371. Interior area of the Pictogram;
    400. Road.
    权利要求:
    Claims (20)
    [1" id="c-fr-0001]
    1. Vehicle lighting system (100), comprising at least a first projection device (200) of at least one pixelated light source (220) defining at least a first projection envelope (260) and at least one second projection device (300) of at least one pixelated light beam (320) defining at least one second projection envelope (360) and configured to project at least one pictogram (370), characterized in that said at least one first projection envelope (260) and said at least one second projection envelope (360) have at least one overlap area.
    [2" id="c-fr-0002]
    2. System according to the preceding claim wherein said at least one second projection device (300) is configured to project said at least one pictogram (370) according to at least one positive projection mode corresponding to a light projection of an interior area ( 371) of said at least one pictogram (370).
    [3" id="c-fr-0003]
    3. System according to the preceding claim wherein said at least one first projection device (200) is configured to cooperate with said at least one second projection device (300) so as to produce an illumination of at least part of said at least one overlap zone when said at least one pictogram (370) is projected by said at least one second projection device (300) according to said at least one positive projection mode.
    [4" id="c-fr-0004]
    4. System according to any one of the two preceding claims, in which said at least one first projection device (200) is configured to cooperate with said at least one second projection device (300) so as to produce a lesser illumination. at least part of said at least one overlap zone with respect to the lighting of the interior zone (371) of said at least one pictogram (370), when said at least one pictogram (370) is projected by said at least one second projection device (300) according to said at least one positive projection mode, and by producing lighting in at least part of said at least one first projection envelope (260) outside the interior zone (371) of said at minus a pictogram (370).
    [5" id="c-fr-0005]
    5. System according to any one of the preceding claims, in which said at least one second projection device (300) is configured to project said at least one pictogram (370) according to at least one negative projection mode corresponding to a light projection d 'an outside area (361) of said at least one pictogram (370).
    [6" id="c-fr-0006]
    6. System according to the preceding claim wherein said at least one first projection device (200) is configured to cooperate with said at least one second projection device (300) so as to produce an illumination of at least part of said at least one overlap zone when said at least one pictogram (370) is projected by said at least one second projection device (300) according to said at least one negative projection mode.
    [7" id="c-fr-0007]
    7. System according to any one of the two preceding claims, in which said at least one first projection device (200) is configured to cooperate with said at least one second projection device (300) so as to produce less illumination. at least part of said at least one overlap zone with respect to the lighting of the external zone (361) of said at least one pictogram (370), when said at least one pictogram (370) is projected by said at least one second projection device (300) according to said at least one negative projection mode, and by producing lighting in at least part of said at least one first projection envelope (260) outside the external zone (361) of said at minus a pictogram (370).
    [8" id="c-fr-0008]
    8. System according to any one of the preceding claims, in which said at least one first projection device (200) comprises at least one matrix (210) of light elements (211) configured to form said at least one pixelated light source. (220).
    [9" id="c-fr-0009]
    9. System according to the preceding claim wherein said at least one matrix (210) of light elements (211) is a matrix whose number of columns is greater than or equal to the number of rows.
    [10" id="c-fr-0010]
    10. System according to any one of the preceding claims, in which said at least one second projection device (300) comprises at least one first matrix of micro-mirrors (350) configured to form said at least one pixelated light beam (320 ) from at least one light source (310).
    [11" id="c-fr-0011]
    11. System according to the preceding claim wherein said at least one second projection device (300) comprises at least a second array of micro-mirrors.
    [12" id="c-fr-0012]
    12. System according to the preceding claim, in which said at least one first matrix of micro-mirrors (350) and said at least one second matrix of micro-mirrors are configured to respectively form at least one first sub-beam of pixelated light and at at least a second pixelized light sub-beam, said at least one first pixelized light sub-beam and said at least one second pixelized light sub-beam being configured to form said at least one pixelized light beam (320).
    [13" id="c-fr-0013]
    13. System according to any one of the preceding claims, in which said at least one overlap zone corresponds to a rate of overlap between said at least one first projection envelope (260) and said at least one second projection envelope (360). between 0% and 100%, advantageously between 30% and 70% and preferably equal to 50%.
    [14" id="c-fr-0014]
    14. System according to any one of claims 8 to 13 wherein the number of pixels (211) of said at least one pixelated light source (220) is less than the number of pixels of said at least one pixelated light beam (320 ).
    [15" id="c-fr-0015]
    15. System according to any one of claims 8 to 13 wherein the ratio between the number of pixels (211) of said at least one pixelated light source (220) and the number of pixels of said at least one pixelated light beam (320) is less than 200, preferably 50, and advantageously less than 3.
    [16" id="c-fr-0016]
    16. System according to any one of the preceding claims, in which said at least one first projection device (200) and said at least one second projection device (300) have a common output diopter.
    [17" id="c-fr-0017]
    17. System according to any one of the preceding claims, in which said at least one first projection device (200) is controlled by control electronics so as to control said at least one pixelated light source according to at least one operating parameter. .
    [18" id="c-fr-0018]
    18. System according to any one of the preceding claims, in which said at least one second projection device (300) is controlled by control electronics so as to modify said at least one pictogram (370) according to at least one operating parameter. .
    [19" id="c-fr-0019]
    19. System according to any one of the two preceding claims, in which said at least one operating parameter is at least one parameter taken from: detection of change in direction of the road, detection of location data, detection of precipitation, detection of the brightness of the road environment, detection of followed vehicle, detection of crossed vehicle, detection of imminent danger, detection of object crossing in front of the vehicle (for example: pedestrian, animals), detection of work area, detection of traffic signs, detection of deceleration, detection of accident, detection of weather conditions, detection of other road users.
    [20" id="c-fr-0020]
    20. Vehicle lighting method (100) comprising at least one lighting system according to any one of the preceding claims, said method comprising at least the following steps:
    o Measurement by at least one sensor of at least one operating parameter;
    o Reception by at least one control electronics of said measurement; o Sending by said at least one electronic control unit of at least a first activation and / or deactivation signal of at least part of a matrix (210) of light elements (211) comprised by at least one first projection device (200);
    o Sending by said at least one control electronics, to at least one second projection device (300), of at least one
    5 second projection signal of at least one pictogram (370) selected from a plurality of pictograms in at least one database as a function of said at least one measurement.
    0¾ 6
    6 & °
    3.0 °
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    法律状态:
    2017-09-29| PLFP| Fee payment|Year of fee payment: 2 |
    2018-03-30| PLSC| Publication of the preliminary search report|Effective date: 20180330 |
    2018-09-28| PLFP| Fee payment|Year of fee payment: 3 |
    2019-09-30| PLFP| Fee payment|Year of fee payment: 4 |
    2020-09-30| PLFP| Fee payment|Year of fee payment: 5 |
    2021-09-30| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1659347A|FR3056680B1|2016-09-29|2016-09-29|LIGHTING SYSTEM FOR MOTOR VEHICLE|
    FR1659347|2016-09-29|FR1659347A| FR3056680B1|2016-09-29|2016-09-29|LIGHTING SYSTEM FOR MOTOR VEHICLE|
    EP17193810.3A| EP3305592B1|2016-09-29|2017-09-28|Lighting system for a motor vehicle|
    US15/721,072| US11156334B2|2016-09-29|2017-09-29|Illumination system for an automotive vehicle|
    CN201710914654.9A| CN107883337A|2016-09-29|2017-09-29|Illuminator for motor vehicles|
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