METHOD FOR CONTROLLING A BRIGHT BEAM AND LIGHTING AND / OR SIGNALING MODULE THEREOF

专利摘要:
The invention relates to a method for controlling a global light beam (28) emitted by a motor vehicle headlamp and formed of selectively activatable beam portions (36) produced independently of each other by lighting means (4). , 6) carried by said projector, the set of portions forming a global light beam when they are all activated and arranged successively side by side. The instantaneous speed of the vehicle is compared with a first predetermined speed threshold, and a zone of high intensity of illumination to be realized when the instantaneous speed is higher than the first predetermined speed threshold is determined.
公开号:FR3038697A1
申请号:FR1556627
申请日:2015-07-10
公开日:2017-01-13
发明作者:Pierre Albou；Vincent Godbillon
申请人:Valeo Vision SA；
IPC主号:

专利说明:

The invention relates to the field of lighting and / or signaling, in particular for motor vehicles. BACKGROUND OF THE INVENTION More particularly, the invention relates to a method for controlling a global light beam emitted by a motor vehicle headlamp and obtained by the addition of intermediate beams produced by at least two lighting means, as well as to the modules which can allow the implementation of such control methods.
A motor vehicle is equipped with headlamps, or headlights, intended to illuminate the road in front of the vehicle, at night or in the case of reduced luminosity. These projectors can generally be used in two lighting modes: a first mode "high beam" and a second mode "low beam". The "high beam" mode provides strong illumination of the road far ahead of the vehicle. The "low beam" mode provides more limited illumination of the road, but still offers good visibility without dazzling other road users. These two lighting modes are complementary. The driver of the vehicle must manually switch modes depending on the circumstances, at the risk of inadvertently dazzle another user of the road. In practice, changing the lighting mode manually can be unreliable and sometimes dangerous. In addition, the dipped beam mode provides visibility sometimes unsatisfactory for the driver of the vehicle.
To improve the situation, projectors with an adaptive lighting function (known in particular under the acronym AFS for "Adaptive Frontlighting System") have been proposed. Such an adaptive lighting function is intended to detect automatically, for example by the image processing acquired by an on-board camera, a user of the road likely to be dazzled by a lighting beam emitted in fire mode. by a projector, and to modify the outline of this light beam so as to create a shadow zone at the location where the detected user is located. The advantages of such an adaptive lighting function are multiple: comfort of use, better visibility compared to lighting in dipped beam mode, better reliability for the change of mode, risk of glare greatly reduced, driving safer .
Document EP2280215 describes an example of a lighting system for a motor vehicle headlamp, with an adaptive lighting function. The system comprises four primary optical elements, in each of which three light sources are associated with three respective light guides, as well as four secondary optical projection elements, in this case lenses, respectively associated with the four primary optical elements. The light emitted by each light source enters the associated light guide and exits through an outlet end of the guide, of rectangular shape. The arrangement of the primary optical elements and their associated secondary optical element causes the light emitted by each optical guide output end to be projected by the secondary optical element so as to form a vertical light segment at the front of the vehicle. The light segments produced overlap partially in the horizontal direction. We then play on the actuation of light sources that can be ignited independently of one another, selectively, to obtain the desired lighting and make a complementary road-like beam, not dazzling for other users of the road. The beam is thus divided into a plurality of light segments that can be turned on or off. The adaptive lighting beam that can be achieved only by electronic ignition control of light sources, and without mechanical movement of an additional cache part, is known in particular as a matrix beam.
Moreover, it is more and more common to see motor vehicles equipped with a directional lighting function, better known by the acronym DBL (for Dynamic Bending Light), in which the objective is to illuminate the road and its aisles when the vehicle is running. The projector is pivotally mounted about a substantially vertical axis of rotation, and therefore in a turn, the projected beam output of the projector is no longer oriented in the longitudinal axis of the vehicle but towards the inside of the turn. The object of the invention is to propose a method for controlling light beams that manages the realization of a matrix beam as well as the production of a directional beam and that can manage the passage from one to the other.
For this purpose, the subject of the invention is a method for controlling an overall light beam emitted by a motor vehicle headlight and formed of selectively activatable beam portions produced independently of each other by lighting means carried by said projector, all the portions forming a global light beam when they are all activated and arranged successively side by side. It is provided according to the method of the invention to compare the instantaneous speed of the vehicle to a first predetermined speed threshold, and to determine an area of high intensity of lighting to be performed when the instantaneous speed is greater than the first predetermined speed threshold.
In particular, it will be possible, in a particular implementation mode, for the global light beam according to the invention to form a complementary road-type beam, segmented by the presence of beam portions, and intended to be associated with a beam of beams. type code, for example by being juxtaposed or superimposed on the code-type beam to form a road beam.
It can be understood that the disposition successively side by side of the beam portions generates or not a partial overlap of two successive portions. It will thus be possible to have an arrangement in which the beam portions are juxtaposed, edge to edge, so as to be contiguous two-to-two, and there may be an arrangement in which the beam portions are juxtaposed and partially superimposed so as to authorize partial recovery of one portion by another portion.
It is possible to identify which of said lighting means produce the portions of beams adapted to illuminate said zone of high illumination intensity, and it is possible to control a displacement of said lighting means identified in the previous step, or else a displacement of the adjacent lighting means of the lighting means identified in the previous step, so as to create a first specific overall light beam comprising said high intensity lighting area. The lighting means are moved so as to cause at least partial superposition of beam portions made by these identified lighting means, in the area of high intensity of illumination. It will be understood that it is possible to identify, for example, a target beam portion, produced by a target lighting means, as a zone of high intensity of illumination to be achieved and that two lighting means can be controlled thereafter. realizing adjacent beam portions disposed on either side of the target beam portion so as to cause a superposition of these neighboring beam portions and the target beam portion.
According to various features of the invention, taken alone or in combination: - all of said lighting means are kept lit; - It is ensured that all the beam portions are moved to maintain a continuity of ignition on both sides of the high intensity lighting area; - It is ensured that the first specific overall light beam has a width less than that of the overall light beam.
According to characteristics of an implementation mode, in which different speed levels of the vehicle are taken into account, the instantaneous speed of the vehicle is compared with at least a second predetermined speed threshold, of greater value than the value of said vehicle. first speed threshold, and, when the instantaneous speed is greater than said second speed threshold, the light intensity of said high intensity lighting zone is increased by superposing other beam portions and by concentrating the overall light beam; whatever the first or second threshold beyond which the speed of the vehicle is detected, a detection is made of the forward orientation of the vehicle, and, when a straight-line driving situation is detected, said zone high intensity of illumination is arranged, by superposition of beam portions, substantially in the center of the overall light beam.
According to features of the invention, it is possible to detect, on a road scene in the vicinity of the vehicle, a specific situation in which a third vehicle is likely to be dazzled by said global light beam. In this case, a first target zone in said global beam including said third party vehicle is determined, and then lighting means carried by said projector which identify the portions of beams providing illumination of said first target zone are identified. A movement of said lighting means identified in the previous step is then controlled so as to create a zone of less illumination corresponding to said first target zone, said zone of high intensity of illumination then being split into two sub-zones arranged with both sides of said area of lesser illumination.
According to other features of the invention, it is possible to detect, on a road scene in the vicinity of the vehicle, a specific situation in which the vehicle is confronted with a turn. In this case, a second target zone in said global beam is determined according to the characteristics of the turn, and then lighting means carried by said projector which identify the portions of beams providing illumination of said second target zone are identified. Then driving a movement of said lighting means identified in the previous step, so as to create a second area of high intensity of illumination corresponding to said second target area.
In the latter two cases, the lighting means are controlled, when the detection that said specific situation is completed, to respectively take a position capable of creating said first specific global light beam.
According to another series of characteristics of the invention, taken alone or in combination with what has preceded: said lighting means comprise light sources and optical deflection means respectively associated with at least one of the sources of light, each light source being individually controlled in ignition while said optical deflection means are individually controlled in motion; the overall light beam consists of a complementary, non-segmented, grating-type beam of the same type; the overall light beam is obtained by the addition of intermediate beams made respectively by separate sets of lighting means, and in which the lighting means of each set are driven in displacement to create the zone of high intensity of illumination ; - The beam portions consist of vertical segments juxtaposed to each other, the displacement of the lighting means generating the displacement of at least one of said segments and its superposition on other segments of the overall light beam. The invention also relates to a light module for implementing the control method as just presented, and which comprises in particular at least one light source and movable mounted optical deflection means.
According to various characteristics specific to such a light module: - an optical system is provided for the emission of a light beam, the optical deflection means being interposed between the light source and the optical system; the optical system consists of a reflector and a projection lens; the light source comprises a plurality of semiconductor sources; the optical deflection means consist of optical electromechanical microsystems mounted rotatably between two end positions, said optical electromechanical microsystems being capable of taking at least one predetermined intermediate position between the two end positions; - The optical electromechanical microsystems are rotatably mounted to move from one to the other end positions, with an angle of rotation of between 2 ° and 7 °; each optical electromechanical microsystem consists of a mirror capable of deflecting the light rays emitted by the light source and mounted on an axis of rotation carried by the module; the electromechanical microsystems are arranged in a linear matrix; a primary optical device is provided, in particular a collimating or focusing lens, arranged between the light sources and the optical deflection means. The invention also relates to an automotive lighting system comprising at least one light module as presented above, as well as at least means for detecting the instantaneous speed of the vehicle, means for analyzing the received detection information and calculation means, comprising at least means for comparing the instantaneous speed with respect to at least one predetermined threshold, to give a command to move the optical deflection means, on the basis of at least one vehicle speed information .
In such a lighting system can be provided that at least one light module as presented above is disposed in a left projector of the motor vehicle and at least one light module as presented above is disposed in a right projector of the vehicle said modules being arranged so that the intermediate light beams they generate add up to form a global light beam.
The lighting system may further comprise means for detecting a third-party vehicle on a road scene, and / or means for detecting a turn extending in front of the vehicle. Other features and advantages of the present invention will appear more clearly with the help of the description and the drawings, among which: FIG. 1 is a diagrammatic representation, seen from the side, of a light module according to the invention, in which are here made visible a light source, a collimation lens, optical deflection means, a reflector and a projection lens; - Figure 2 is a schematic representation of the module of Figure 1, seen from above, wherein the reflector is made transparent to facilitate the visibility of the optical deflection means, and the rotation axes of the electromechanical microsystems that compose them; and FIGS. 3 to 5 are diagrams illustrating the operation of the invention in which intermediate beams are rotated to modify the overall light beam emitted by a motor vehicle headlamp, according to an embodiment in which the beam overall light is modified solely according to the speed of the vehicle (Figure 3), according to an embodiment in which the overall light beam is further modified according to the detection of a turning situation (Figure 4), and according to an embodiment in which the overall light beam is further modified according to the detection of a vehicle that can be dazzled (Figure 5).
We will first describe a light module for lighting and / or signaling of a motor vehicle according to a first embodiment illustrated in Figures 1 and 2. The light module 2 comprises at least one light source 4 capable of emitting light rays in the direction of first optical deflection means 6, and an optical system 8. At the output of the module, an intermediate beam is thus produced, which can be completed by the addition of other intermediate beams obtained by others. light modules arranged nearby in the same projector of the motor vehicle or in another projector, so as to form a global light beam. In the following description, the term optical plane will be used to define the vertical plane comprising the optical axis, being observed that the optical plane corresponds to the plane of the sheet in the illustration of FIG.
As will be described below, at least the first optical deflection means are controlled so that, when the instantaneous speed of the vehicle is greater than a first predetermined speed threshold, a portion of the overall light beam is concentrated to form a zone of high intensity of illumination, that is to say a zone lit up more strongly than the immediately adjacent zones.
Each light source here consists of a semiconductor source, and for example a light-emitting diode, which can be associated with a printed circuit board and a radiator for cooling the electronic components carried by said card.
As can be seen in FIG. 2, the module comprises three separate light-emitting diodes 10 reported on a common board 12 of printed circuits. It will be understood that other configurations, in number, in geometric arrangement, can be chosen without departing from the context of the invention. In particular in the forthcoming description of preferred embodiments of the invention, it will be pointed out that a vehicle lighting system may comprise a first module in which three diodes are able to produce three portions of beams and a second module in which four diodes are capable of producing four portions of beams, these seven portions being juxtaposed and / or superimposed to form a global light beam.
The first optical deflection means 6 consist of a plurality of electromechanical microsystems (known by the acronym MEMS for the English translation "MicroElectroMechanical Systems"), arranged in line matrix so that each of these electromechanical microsystems is arranged opposite a light emitting diode (or a "light chip" individually addressable diode). The electromechanical microsystems extend longitudinally forward of the light sources, and they consist of movable mirrors 14 able to reflect part of the light rays emitted by the light source.
Each mirror 14 is rotatably mounted about an axis 16 carried by the module, so as to pivot between two end positions, obtained by mechanical stop of the rotation of the axis. According to the position of the mirrors in the series, and therefore according to the centered or eccentric position of the portion of the light beam generated by this mirror, a standard position of each mirror is defined as being one of the two end positions, or else as the position at the center of the two end positions. For a diode centered on the optical axis and the associated electromechanical microsystem also centered on the optical axis, the first standard position is calibrated so that the rays reflected by the mirror thus oriented impact the optical system disposed downstream substantially in the optical plane. and the two end positions are calibrated on either side of the first standard position so that the rays reflected by the mirror thus oriented impact the optical system at a distance from the optical plane corresponding to half the width. desired luminous segments constituting the intermediate light beam, or with one of the end positions corresponding to the standard position, and the other calibrated end position so that the rays reflected by the mirror thus oriented impact the optical system at a distance from the optical plane corresponding to the desired width of the composed light segments ant the intermediate light beam, in the direction of approximation of the center of the overall light beam.
It is understood that when all the mirrors are in the standard position, regular intermediate beams are obtained, with segments of the component arranged at regular intervals. On the other hand, if only one of the mirrors of the optical deflection means is pivoted, the intermediate beam is no longer regular, and the superposition of the two intermediate beams involves a superposition of two segments of the matrix beam, and therefore one more zone. strong light intensity.
In the advantageously narrow angular range of rotation, of the order of 2 ° to 7 °, the light reflected by the mirrors in one or the other of the extreme positions is directed integrally towards the projection device disposed downstream on the path of the light rays. In their first end position, the optical deflection means are capable of deflecting the light rays towards a first zone of the optical system and in their second end position, the same deflection means are able to deflect the light rays towards a second zone of the optical system.
It is also particularly interesting to note that the microsystems used in the invention are not binary. This means that the angle of rotation can be chosen indifferently in the angular range of +/- 7 °, without being limited to one or the other of the extreme positions, by voltage or current control instructions. according to the type of selected microsystems, electrostatically controlled, piezoelectric or magnetic for example.
In particular, it is possible to provide for each microsystem predefined intermediate positions, which can be taken by these microsystems to form a portion of beams associated with a predefined state as will be described below.
Optionally a primary optic is disposed between the first optical deflection means and the light source, in addition to the optical system disposed at the output of the module, to improve the efficiency and avoid beam overlays. This primary optics may be a collimating or focusing lens 18.
The optical system 8 is disposed at the output of the module in the path of the light rays emitted by the light-emitting diode 10 and deflected by the mirrors 14. As illustrated, the optical system comprises a reflector 20 and a projection lens 22. It will be understood that that other optical system arrangements can be implemented without departing from the context of the invention.
The module further comprises means for controlling light sources and electromechanical microsystems, able to drive on the one hand the ignition, extinction or modification of the light intensity emitted by each light source of each module, and secondly the rotation of the electromechanical microsystems as a function of traffic condition information of the vehicle, among which the control means receives at least one information for detecting the speed of advance of the vehicle. This information can be obtained by a sensor specific to the control method according to the invention, or be taken from a vehicle information network. The control means comprise means for analyzing any information transmitted by these detection means. Other traffic condition information may be obtained and supplied to the control means, and in particular detection means may be provided on the illuminated road scene of a vehicle not to dazzle, and / or detection means. the presence of a turn in front of the vehicle. The detection means may consist for example of a camera facing the road scene extending in front of the vehicle, and associated image processing means, which allow the development of a detection information that the module of detection is able to send to the control means for the rotation of the microelectromechanical systems. The means for detecting the presence of a turn in front of the vehicle may consist of an angular speed sensor of the vehicle, or an onboard satellite navigation system.
A light module 2 as just described makes it possible to implement the method for controlling a global light beam emitted by a motor vehicle headlamp and obtained by the addition of intermediate beams produced by at least two means. lighting according to the invention.
At first, light rays are emitted by the diodes 10 of the module 2 when the control module receives information relating to the automatic detection of driving conditions in traffic lights or information relating to a control of the driver.
The spokes are directed substantially parallel to the optical axis towards the electromechanical microsystems formed of moving mirrors 14 which are in the first standard position, and the result is an intermediate beam of the "high beam" type, divided into a number of segments. equal to the number of diodes, and corresponding mirrors, provided for the entire lighting system.
According to the information sent by the detection means to the control module, that they are related to the speed of the vehicle on the one hand, and to the presence of a vehicle on the road scene illuminated by the beam previously made or in the presence of a turn in front of the vehicle on the other hand, the control module identifies what is the area of high intensity of lighting to achieve, and possibly the area in which a detected vehicle is present, and it determines what are the diodes and electromechanical microsystems associated with moving to achieve the appropriate lighting of these areas.
The light rays deviated by a mirror represent a light segment, here vertical, of the intermediate beam and the rotation of a few degrees of a mirror generates a transverse displacement of the corresponding light segment. As may have been previously stated, it is possible to provide at least one intermediate position that the mirror can take to generate an intermediate position of the corresponding beam portion, between the standard position in which it forms the overall light beam and a position of 'end.
Reference will now be made, with reference to FIGS. 3 to 5, to different modes of implementation of the control method. In each of these modes of implementation, the overall light beam is obtained by the addition of two complementary intermediate light beams, in the case of a motor vehicle lighting assembly in which two light modules as they come to be described are housed in series in a projector whose overall light beam is shown on the right of the figures, resulting from the addition of the intermediate beams of the two modules shown on the left of the figures.
Each of these figures illustrates a lighting sequence for which successively represented, from top to bottom, with portions 23 of light beam projected on a vertical wall, the different states of the overall light beam according to the information received by the means of control associated with each module, Figure 3 illustrating in more detail the different states of the intermediate beam portions and the resulting combination to form the overall light beam, while Figures 4 and 5 show only the overall light beam.
Each of these figures illustrates an implementation mode taking into consideration the speed information as the present invention provides.
In Figure 3, there is illustrated the case where only the speed information is taken into consideration. The first line corresponds to a standard state with a forward speed of the vehicle less than a first predetermined speed threshold. A first module comprises three diodes, and when they are lit, it is formed, by reflection of the light emitted on the optical deflection means in particular, a first intermediate beam 24 composed of three segments 2g, 0, 2d, spaced apart. one of the other, in the transverse direction, of a first determined interval d1. A second module comprises four diodes, and when they are lit, a second intermediate beam 26 is formed composed of four segments 3g, 1g, 1d, 3d, spaced apart from each other, in the transverse direction , of a second determined interval d2. The modules are oriented with respect to the optical axis of the vehicle, so that, by addition of the two intermediate beams, an overall light beam 28 is formed consisting of a succession of beam portions 23, here in the form of segments, it being understood that the segments of the first intermediate beam have a width equal to the second interval d2 to be housed between the segments of the second intermediate beam and conversely the segments of the second intermediate beam have a width equal to the first interval d1 to come to lodge between the segments of the first intermediate beam. As illustrated, one can predict that the segments all have the same dimension and that the intervals between the segments are the same from one intermediate beam to another. It should be noted that according to the invention, the width of the segments can vary from one segment to another depending on whether they are positioned at the center of the beam or at the edges. The central segments are thus provided narrower than the lateral segments. In the same vein of a nonhomogeneous arrangement according to the position of the segments, the intervals between the segments of a sub-beam may vary, and the rotation angles of the segments may differ from one segment to another .
It will be understood that it is possible for the segments of the edge of the beam to be fixed and to be controlled simply by switching off or on. This avoids having to manage a rotation angle of high value for their displacement, complicated to implement, while this movement may not be justified given the position of the segment on the road. The system can therefore combine moving segments and fixed segments. However, there are shown modes of implementation in which advantageously all segments move to achieve a beam without discontinuity and high overall light intensity, without extinguishing one or the other of the sources.
The lines 3 (b) to 3 (d) of FIG. 3 illustrate the realization of a zone of high intensity of illumination at the center of the overall light beam, in the case where the speed of advance of the vehicle V is successively greater than a first determined threshold V-ι, a second determined speed threshold V2 and a determined third speed threshold V3, with V1 <V2 <V3. The fact that the vehicle is traveling at a fast speed means that the driver must be able to anticipate possible changes in traffic conditions, for example obstacles that may stand in his way. It is therefore advantageous to increase the luminous intensity at the center of the overall light beam, by moving beam portions and controlling the corresponding lighting means, so that the driver has a better view of what is happening in front of his vehicle, this one rolling in a straight line. The area of high intensity of lighting is all the more concentrated as the speed is fast.
On line 3 (b), a specific overall first light beam 31 is formed in which the zone of high illumination intensity 30 is obtained by superposition of the beam portions 1g and 1d each respectively by one half of the beam portion. 0. The set of microsystems, with the exception of that corresponding to the central beam portion 0, is rotated so that the beam portions distinct from that of the center approach the center by a distance equivalent to one half beam portion width.
It can be observed that the first specific global light beam 31 is narrower than the global light beam 28. And more generally, it is notable that the faster the speed, the less the overall light beam is wide. This is explained by the fact that the outer beam portions 3g and 3d follow the constriction of the beam portions on the center of the overall beam, in order to keep a continuous overall beam, and this is justified by the fact that at high speed , it is less penalizing not to see obstacles present on the sides at the height of the vehicle since the speed makes it possible to overtake them on the launch of the vehicle.
On line 3 (c), the illumination intensity of zone 30 is further increased by superposition of the beam portions. A strip 32 of very high intensity is produced by the superposition of the beam portions 1g, 1d and 0. At least three beam portions are superimposed to form this strip 32. Again, the beam portions are brought closer to the center to maintain a global light beam without discontinuity. It can be seen that, as a result, the width of the zone of high illumination intensity, that is to say the illumination intensity of which is greater than that of each of the portions of the overall light beam illustrated on line 3a. is larger at this point, with V greater than V2, than the width of the high intensity area when V is smaller than V2.
Finally, on the line 3 (d), the illumination intensity of the zone 30 is increased to its maximum, again creating a band 32 of very high intensity obtained this time by superposition of at least four beam portions. luminous. The remarks made in the previous paragraph also apply when V is greater than V3. It will be understood that there are shown here four distinct stages, with three determined speed thresholds at which the speed V of the vehicle is compared, but that this number could vary in particular as a function of the number of portions of segments.
FIG. 4 illustrates a state in which a turn has been detected and in which it is sought to create a second specific overall light beam 34 having a second high intensity lighting zone 36 different from the first high intensity lighting zone 30 This second zone is of high illumination intensity, since the speed of the vehicle V is greater than the first threshold Vi, and it is oriented towards the inside of the turn in order to optimize the visibility of the driver of the road scene in front of the vehicle. vehicle. For this purpose, the first intermediate beam 24 and the second intermediate beam undergo displacements, by driving the lighting means, different from the previous case in that the central beam portion 0 is shifted towards the inside of the bend and in that that that of the beam portions which is immediately adjacent to this central beam portion in the overall light beam and which is inwardly of the face, that is to say here the portion 1 d, remains unchanged. The target zone in which this second zone of high intensity of illumination is to be carried is determined by the control means of the vehicle according to the characteristics of the turn.
When the turning situation is over, it is therefore fast to return to a high-speed straight-line lighting situation, with a high-intensity lighting zone 30 at the center of a beam similar to the first overall light beam. specific 31 (see line 4 (c)). It will be understood that according to the invention, one passes from one situation to another, with a zone of high intensity of illumination located at the center of the overall beam in a straight line or towards the inside of the turn, with sources of light. fixed in a fixed module, only by inclination of a pivoting mirror.
FIG. 5 illustrates a state in which a vehicle has been detected and in which it is sought to create a third specific overall light beam 38 in which a target zone, of less illumination, 40 in which no potentially dazzling light ray is formed is formed. form. For this purpose, the first intermediate beam 24 and the second intermediate beam 26 are modified by transverse shifting of at least one light segment, so as to create high intensity zones 30a and 30b on either side of the target zone. 40. As before, since the speed of the vehicle is greater than a first determined threshold Vi, the width of the beam is narrowed by bringing the outer beam portions closer to the center. The fact, by driving the lighting means, away from the target area, where it is desired less lighting, the beam portions corresponding to this target area, combined with this approximation of the center of the outer beam portions, generates a superposition of beam portions on either side of the lesser illumination zone and thus the split of the high intensity lighting zone 30 into two parts, not necessarily symmetrical, on either side of the zone of illumination. less lighting 40.
As before, when the crossing situation is over, it is therefore fast to return to a high-speed straight-line lighting situation, with a high-intensity lighting zone 30 at the center of a beam similar to the first one. specific global light beam (see line 5 (c)). It will be understood that according to the invention, one passes from one situation to another, with a zone of high intensity of illumination located at the center of the overall beam in a straight line or towards the inside of the turn, with sources of light. fixed in a fixed module, only by inclination of a pivoting mirror.
According to a variant of the invention, it may be provided, particularly in the case of a "pixel lighting", that the displacement of the beam portions as a function of speed can be horizontal or vertical. As previously described, the horizontal displacement of a beam portion is made on each segment individually, and it is interesting to note that the vertical displacement is performed on the module as a whole. It can be used for this electromechanical microsystems controllable on two perpendicular axes. With such devices, the light of the area to be extinguished can be "ejected" as well laterally, which is preferable for areas near the horizon, than vertically, upwards or downwards, which may be more interesting for high areas.
The foregoing description clearly explains how the invention makes it possible to achieve the objectives that it has set itself, and in particular to propose an intermediate light beam control method that allows the realization of a segmented complementary road-type beam, which can be modified so that, depending on the instantaneous speed of the vehicle with respect to at least a predetermined speed threshold, a portion of the overall light beam is concentrated to form a zone of high illumination intensity, that is, that is to say, a zone lit up more strongly than the immediately adjacent zones, and this without loss of overall luminous intensity, and without increasing the intensity of one or the other of the light sources.

权利要求:
Claims (15)
[1" id="c-fr-0001]
1. A method for controlling a global light beam (28) emitted by a motor vehicle headlamp and formed of selectively activatable beam portions (23) produced independently of each other by lighting means (4, 6). carried by said projector, the set of portions forming a global light beam when they are all activated and disposed successively side by side, in which the instantaneous speed of the vehicle is compared to a first predetermined speed threshold (V-ι), and wherein a zone of high illumination intensity (30) to be realized when the instantaneous speed is greater than the first predetermined speed threshold is determined.
[2" id="c-fr-0002]
2. Method according to claim 1, wherein it is identified which of said lighting means (4, 6) perform the portions of beams (23) adapted to provide illumination of said high intensity lighting zone (30). and in which a displacement of said lighting means identified in the previous step is controlled, and / or lighting means directly adjacent to said lighting means identified in the previous step, so as to create a first specific global light beam (31) having said high illumination area (30).
[3" id="c-fr-0003]
3. Control method according to one of claims 1 or 2, wherein is kept lit all of said lighting means (4, 6).
[4" id="c-fr-0004]
4. Control method according to one of claims 1 to 3, wherein the set of beam portions (23) is moved to maintain a continuity of ignition on both sides of the high intensity area of lighting (30).
[5" id="c-fr-0005]
5. Control method according to one of the preceding claims, wherein the instantaneous speed of the vehicle is compared with at least a second predetermined speed threshold (V2), of greater value than the value of said first speed threshold (V- ι), and wherein, when the instantaneous speed is greater than said second speed threshold (V2), the light intensity of said high intensity lighting zone (30) is increased by superposing other beam portions and by concentration of the overall light beam.
[6" id="c-fr-0006]
6. Control method according to one of the preceding claims, wherein is carried out a detection of the forward direction of the vehicle, and wherein, when a running situation in a straight line is detected, said high intensity area. illumination device (30) is arranged, by superposition of beam portions, substantially in the center of the first specific overall light beam (31).
[7" id="c-fr-0007]
7. Control method according to the preceding claim, wherein the detection, on a road scene in the vicinity of the vehicle, of a specific situation in which a third vehicle is likely to be dazzled by said global light beam (28). ), and a target zone is determined in said overall beam including said third vehicle, in which then are identified lighting means (4, 6) carried by said projector which perform the portions of beams providing illumination of said target area , and in which a movement of said lighting means identified in the preceding step is piloted, so as to create a zone of least illumination (40) corresponding to said target zone, said zone of high intensity of illumination (30) then being split into two sub-areas (30a, 30b) disposed on either side of said area of least illumination (40).
[8" id="c-fr-0008]
8. Control method according to one of claims 6 or 7, wherein the detection, on a road scene in the vicinity of the vehicle, a specific situation in which the vehicle is facing a turn, and is determined a second target zone in said global beam as a function of the characteristics of the turn, in which then lighting means (4, 6) carried by said projector which identify the beam portions providing illumination of said second target zone are identified, and wherein a movement of said lighting means identified in the previous step is piloted so as to create a second high intensity lighting zone (36) corresponding to said second target area.
[9" id="c-fr-0009]
9. Control method according to one of claims 7 or 8, characterized in that the lighting means (4, 6) are controlled, when one realizes the detection that said specific situation is completed, to respectively take a position capable of creating said first specific global light beam (31).
[10" id="c-fr-0010]
10. Control method according to one of the preceding claims, characterized in that said illumination means comprise light sources (4) and optical deflection means (6) associated respectively with at least one of the sources of light. light, each light source being individually controlled ignition while said optical deflection means are individually controlled in motion.
[11" id="c-fr-0011]
11. Method according to one of the preceding claims, wherein the beam portions (23) consist of vertical segments juxtaposed to each other, the displacement of the lighting means (4, 6) generating the displacement of at least one of said segments and its superposition on other segments of the overall light beam.
[12" id="c-fr-0012]
12. Light module for the implementation of the control method according to one of the preceding claims, comprising a light source (4) and movable optical deflection means (6) mounted.
[13" id="c-fr-0013]
13. Light module according to claim 12, characterized in that it further comprises an optical system (8) for the emission of a light beam, the optical deflection means (6) being interposed between the light source and the optical system.
[14" id="c-fr-0014]
14. Module according to one of claims 12 to 13, characterized in that the optical deflection means (6) consist of optical electromechanical microsystems (14, 16) mounted rotatably mounted between two end positions.
[15" id="c-fr-0015]
15. An automotive lighting system comprising at least one light module according to one of claims 12 to 14, and at least means for detecting the instantaneous speed of the vehicle, means for analyzing the received detection information and computing means, comprising at least means for comparing the instantaneous speed with respect to at least one predetermined threshold, in order to give the displacement control instruction of the optical deflection means (6).

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同族专利:

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公开号 | 公开日

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US20170008446A1|2017-01-12|

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US9758087B2|2017-09-12|

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JP6862113B2|2021-04-21|

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JP2017030735A|2017-02-09|

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CN106338044A|2017-01-18|

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CN106338044B|2021-08-20|

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FR3038697B1|2017-08-11|

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EP3115256A1|2017-01-11|

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法律状态:
2016-07-29| PLFP| Fee payment|Year of fee payment: 2 |

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2017-01-13| PLSC| Publication of the preliminary search report|Effective date: 20170113 |

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2017-07-31| PLFP| Fee payment|Year of fee payment: 3 |

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2018-07-27| PLFP| Fee payment|Year of fee payment: 4 |

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2019-07-31| PLFP| Fee payment|Year of fee payment: 5 |

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2020-07-31| PLFP| Fee payment|Year of fee payment: 6 |

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2021-07-29| PLFP| Fee payment|Year of fee payment: 7 |

优先权:

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申请号 | 申请日 | 专利标题

---

FR1556627A|FR3038697B1|2015-07-10|2015-07-10|METHOD FOR CONTROLLING A BRIGHT BEAM AND LIGHTING AND / OR SIGNALING MODULE THEREOF|FR1556627A| FR3038697B1|2015-07-10|2015-07-10|METHOD FOR CONTROLLING A BRIGHT BEAM AND LIGHTING AND / OR SIGNALING MODULE THEREOF|

---

EP16178058.0A| EP3115256A1|2015-07-10|2016-07-05|Method for controlling a light beam and corresponding lighting and/or signalling module|

---

CN201610537093.0A| CN106338044B|2015-07-10|2016-07-08|Method for controlling a light beam and corresponding lighting and/or signaling module|

---

JP2016136222A| JP6862113B2|2015-07-10|2016-07-08|How to control the light beam and related lighting and signal modules|

---

US15/205,428| US9758087B2|2015-07-10|2016-07-08|System and method for controlling a light beam and corresponding lighting and/or signaling module|