• 专利附录
  • 专利说明
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  • 类似技术
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    • 专利摘要:
    A vehicle headlamp comprising at least two light modules, wherein a first light module is arranged to generate a dynamically controllable first partial light distribution (510). The first light module comprises at least a first light source and at least a first means for generating a first light image from the first partial light distribution (510) and at least a first projection optics, wherein by means of the at least one first projection optics, the first light image as the first light image in a first emission direction can be projected onto the street. A second light module is configured to generate a dynamically controllable second partial light distribution (520). The second light module comprises at least one second light source and at least one second means for generating a second light image from the second partial light distribution (520) and at least one second projection optics, wherein by means of the second projection optics as the second light image in a second radiation direction on the road can be projected , In a built-in state of the headlight in a vehicle, the first emission direction of the first light image and the second emission direction of the second light image are approximately parallel and the first light image and the second light image in the far region in front of the vehicle are at least partially superimposed, wherein the first partial light distribution (510) has a first width (511) and the second partial light distribution (520) has a second width (521), wherein the first width (511) is greater than the second width (521), and / or the first part Light distribution (510) has a first height (512) and the second sub-light distribution (520) has a second height (522), wherein the first height (512) is greater than the second height (522).
    公开号:AT519462A4
    申请号:T50041/2017
    申请日:2017-01-24
    公开日:2018-07-15
    发明作者:Lahmer Martin
    申请人:Zkw Group Gmbh；
    IPC主号:
    专利说明:

    vehicle headlights
    The invention relates to a vehicle headlamp comprising at least two light modules.
    In the development of the current headlamp systems is increasingly the desire in the foreground to project a high-resolution as possible on the road surface, which can be quickly changed and adapted to the respective traffic, road and lighting conditions. The term "roadway" is used here for a simplified representation, because of course it depends on the local conditions, whether a photo is actually on the roadway or even extends beyond.In principle, the photograph in the sense used here by means of a projection on a Furthermore, the generated light image should be adaptable to different traffic situations according to the relevant standards, which relate to the automotive lighting technology.
    In order to meet this stated need, among other things, headlights have been developed which form a luminous matrix from a plurality of individual beams. Such lighting devices, which are also referred to as "pixel light", are common in the automotive industry and serve, for example, the imaging of glare-free high beam by the light is usually emitted by a plurality of light sources and by a corresponding plurality of juxtaposed light guides (Vorsatzoptik / The light guides have a relatively small, funnel-shaped cross-section and therefore emit the light of the individual light sources assigned to them in a very concentrated manner in the emission direction spatially curved surface, the Petzval surface of the upstream imaging optics, on.
    Pixel spotlights are very flexible in terms of light distribution because for each pixel, i. For each light guide, the illuminance can be controlled individually and arbitrary light distributions can be realized, such as a low beam light distribution, a cornering light distribution, a city light distribution, a
    Highway light distribution, cornering light distribution or high beam distribution.
    The AT 513 738 Bl describes headlight systems of the applicant, which project the light of a large number of light-emitting diodes (LEDs) via projection systems with single lenses as a light image on the road, the brightness of the individual LEDs, which are controlled by a central processing unit, set individually or can be changed.
    In addition to the variable illuminance, the geometry of the light guide elements can be used to influence light images.
    The number of light sources within the luminous matrix of a headlight determines the resolution of the light image and the level of detail with which within a light distribution areas can either be selectively hidden or irradiated stronger or weaker. For example, oncoming vehicles may be intentionally hidden in order not to dazzle them or selectively illuminate traffic signs to increase their readability. In principle, within a light distribution, a higher resolution is usually needed in the region of the center of the light distribution, ie in front of the vehicle, than at the edge of the light distribution, i. beside the road. Thus, the number of light sources often decreases from the center towards the edge. At the same time, the intensity maximum of the light distribution is usually pronounced in the middle of the light distribution, and decreases towards the edge. This results, for example, in an enlargement of the light exit surfaces, starting from the center of a row of illumination up to the edge, in order to take account of this desired reduction in brightness.
    The entire projection arrangement consists of light source, the primary optics and a single or multi-stage imaging optics (a single projection lens represents the simplest embodiment).
    Applicant's presently known lighting devices, as noted above, employ a two-dimensional array-like arrangement of the light sources, typically LEDs, to produce a segmented low beam and high beam distribution. Often, in the central area, the light exit surfaces of the light guide elements are kept smaller than at the edge.
    The lighting device described has all ding the disadvantage that the achievable resolution of the resulting light image for some applications is too low to be able to optimally exploit the legally prescribed limits, for example, in terms of a light-dark boundary and on the other hand, a visually for the user to make appealing photo.
    Among other things, headlamps have been developed in which a variably controllable reflector surface is formed from a plurality of micromirrors and reflects on selected regions a light emission which is generated by a light source unit in the emission direction of the headlamp. Such lighting devices are advantageous in vehicle because of their very flexible lighting functions, since the illumination intensity can be controlled individually for different lighting areas and any light functions can be realized with different light distributions, such as a low beam light distribution, a cornering light distribution, a city light distribution, a Highway light distribution, cornering light distribution, high beam distribution, auxiliary high beam distribution, or the formation of glare-free high beam (also known as Adaptive Driving Beam Headlighting System, ADB). For the micromirror arrangement, the so-called Digital Light Processing (DLP®) projection technology is used, in which images are generated by modulating a digital image onto a light beam. In this case, the light beam is divided into partial areas by a rectangular arrangement of movable micromirrors, also referred to as pixels, and then reflected pixelwise, either into the projection path or out of the projection path. The basis for this technique is an electronic component which contains an array of mirrors in the form of a matrix of mirrors and their driving technique and is referred to as "Digital Micromirror Device" (DMD) A DMD microsystem is a surface light modulator (Spatial Light Modulator, SLM), which consists of matrix-like micro-mirror actuators, that is, tiltable mirror surfaces, for example with an edge length of about 16 pm or even below Its tilt angle is individually adjustable and usually has two stable end states between which can be changed within a second up to 5000. The individual micromirrors can each be controlled, for example by a pulse width modulation (PWM) to in the main beam direction of the DMD Arrangement we depicting the states of the micromirrors whose time-averaged reflectivity lies between the two stable states of the DMD. The number of mirrors corresponds to the resolution of the projected image, where a mirror can represent one or more pixels. Meanwhile, DMD chips with high resolutions in the megapixel range are available. The underlying technology for adjustable mirrors is Micro-Electro-Mechanical Systems (MEMS) technology. While the DMD technology has two stable mirror states, and by modulating between both stable states, the reflection factor can be set, the "Analog Micromirror Device" (AMD) technology has the property that the individual mirrors can be set in variable mirror positions. which are each in a stable state.
    Compared to the former technology, the DLP® technology has the advantage that very detailed, high-resolution, dynamically changing photos can be generated. The disadvantage, however, is that the light image is very limited in its geometry, ie in the ratio of width to height in the projection in front of the vehicle, but also in the brightness to be achieved and therefore the DLP® technology is not optimally suited for all lighting functions For example, in a curve light function. Within the light image in the respective individually controllable areas, which corresponds to a "pixel", however, the light distribution may appear inhomogeneous, ie in the center of the pixel it may be brighter than at the edge of the pixel.
    It is an object of the invention to overcome the disadvantages mentioned.
    The object is achieved by a headlamp of the type mentioned above in that a first light module is configured to generate a dynamically controllable first partial light distribution, wherein the first light module at least a first light source and at least a first means for generating a first light image from the first Partial light distribution and at least a first projection optics comprises, wherein by means of the at least one first projection optics, the first light image is projected as a first light image in a first emission direction on the road, and a second light module is set up to generate a dynamically controllable second partial light distribution , wherein the second light module comprises at least one second light source and at least one second means for generating a second light image from the second partial light distribution and at least one second projection optics, wherein by means of the second projection optics as a second light image in a second Abst Rahlrichtung is projected onto the road, and in a built-in state of the headlight in a vehicle, the first emission direction of the first light image and the second emission of the second light image are approximately parallel and overlap the first light image and the second light image in the remote area in front of the vehicle at least partially wherein the first partial light distribution has a first width in the horizontal direction U and the second partial light distribution has a second width in the horizontal direction U, wherein the first width is greater than the second width, and / or the first partial light distribution a first height in the vertical direction V and the second partial light distribution has a second height in the vertical direction V, wherein the first height is greater than the second height.
    The inventive solution not only the advantages of two technologies for vehicle headlights are strung together, but also a combinatorial effect achieved by a total of a light image can be generated that allows both a very large illumination range, as well as the overall light image in areas can be very detailed, and a very high light intensity can be achieved.
    The result is an economically particularly favorable combination of two headlamp technologies in a headlamp, wherein in addition to a large and bright photo only in the center of the light image, a high resolution for generating a detailed light distribution is available, and at the edges of a smaller
    Dissolution is accepted. As a result, an electronic control can be designed in a simple and cost-effective manner, for example by requiring an electronic memory for storing one or more light distributions, as well as lower computing capacities for actuating the controllable, optical control means. In addition, the difference in the optical resolutions between the two controllable, optical imaging means can be selected deliberately large, so that an optimal vote for the images to be generated for different light functions can be done.
    It is favorable if the first width is at least three times as large as the second width, and / or the first height is at least twice as large as the second height. From the mentioned width or height of the Vorteü, which can be obtained by the invention, particularly large. Frequently, high-resolution light distributions have a Field Of View (FOV) in the horizontal direction of about ± 6 ° and in the vertical direction of about ± 2 °, while low-resolution light distributions have a field of view in the horizontal direction of about ± 20 ° and in vertical direction between about -5 ° to about + 12 °.
    Furthermore, it is favorable if the first partial light distribution has a first resolution and the second partial light distribution has a second resolution, wherein the second resolution is higher than the first resolution, preferably at least ten times higher.
    By differentiating between different resolutions of the two partial light distributions in pictorial representations, it can be achieved that the respective means for producing the two partial light distributions can be optimized, for example, according to size, simple construction, costs, maintenance, etc.
    The resolution of a light distribution is understood to mean the product of the number of displayable image lines and image columns, such as in computer monitors and cameras.
    A further development of the invention is formed in that the first means for generating a first light image from the first part light distribution is a first primary optic comprising a plurality of light guide elements, and a carrier layer. On a rear side of the carrier layer, the light guide elements are arranged, and on a front side of the carrier layer, the light image can be generated. The light guide elements are arranged adjacent to one another or overlapping in a row in an axial direction and form at least one line. Each light guide element has a light entry surface for coupling light from at least one light source unit, and a light exit surface for coupling out light. The first light source comprises a plurality of light source elements, each of which is configured to generate individually controllable light that can be coupled into the light entry surfaces of the light guide elements to form a total dynamically controllable light distribution on the support layer, by means of the first projection optics as the first partial light distribution can be projected onto the road in the first emission direction. It can thereby be achieved that a simple and adapted to the application very well adapted to the requirements in a vehicle headlamp light module is used to form a first, controllable light image. In addition, the size is small and the cost of construction, production and maintenance are favorable.
    A further development of the invention is also formed in that the second means for generating a second illumination image from the second partial light distribution is at least one controllable reflector, which is further encompassed by the second light module. The second light source is configured to emit light and illuminate in a first propagation direction, in the beam path of the controllable reflector is arranged, and the controllable reflector, the light in a second propagation direction, in the beam path, the second projection optics is arranged and in one direction the vehicle is oriented, at least partially reflected to form a light distribution in front of the vehicle. The controllable reflector comprises an arrangement of a multiplicity of controllable individual mirrors whose reflective surfaces are arranged in a non-tilted state flat in a first plane and as a rectangular matrix of individual mirrors. The light emitted by the second light source falls in the first direction of propagation onto the controllable reflector and is reflected by this a first driven state in the direction of the second propagation direction and / or reflected in a second controlled state of the controllable reflector in a third propagation direction as a second light image , By means of the second projection optics, the second illuminated image can be projected as a second partial light distribution onto the street in the second emission direction.
    In a further development of the invention, in those regions of the projected common light image in which the first partial light distribution coincides with the second partial light distribution.
    Light distribution overlaps the brightness of the second partial light distribution in these areas at least partially reduced. It can thereby be achieved that a light module optimally adapted to the application in a vehicle headlight can be used to form a second, controllable illumination image which has a high resolution, in which the size is low and the costs for construction, production and maintenance are favorable are.
    In a further aspect of the invention it can be achieved that in those regions of the projected common light image in which the first partial light distribution overlaps with the second partial light distribution, the brightness of the second partial light distribution in these regions is at least partially adjusted in such a way in that local brightness differences in this area, which are caused by the second partial light distribution, are reduced. Consequently, it is possible to improve the homogeneity of the overall light distribution in the resulting overall light image. A pixel of the first partial light distribution, which has a lower resolution than the second partial light distribution, is assigned a plurality of pixels of the second partial light distribution, which overlap the pixel of the first partial light distribution. By selectively controlling these multiple pixels of the second partial light distribution, it is possible to reduce or compensate for brightness fluctuations in the light distribution of the pixel in the first partial light distribution. In addition or alternatively to the improved brightness of the projected common light image just discussed, it can be achieved that in the region which is overlappingly illuminated by both partial light distributions, the brightness of the second agent producing the second partial light distribution having the higher resolution is can be reduced and the illumination by the other means, which generates the first partial light distribution, can take place. This can have a favorable effect on a longer life of the components involved by a lower thermal load of the second agent in the generation of the light distribution. This is particularly advantageous because the second higher resolution means is often technologically more complex and expensive than the first lower resolution means.
    For this purpose, it is clearly necessary that the brightness be measured as light distribution of all individual pixels of the first partial light distribution and stored for example as calibration data in a memory, as well as used in the control of the second means, for example by a computing unit. This can be achieved particularly easily if calibration data can be generated from sensor data of an optical sensor which comprise the generated light image of the first partial light distribution, the resolution of the optical sensor at least corresponding to that of the second partial light distribution, and the calibration data in a memory are stored and by a control device, which controls the controllable reflector electrically, are taken into account in a determination of the second partial light distribution.
    The headlight according to the invention can be constructed, manufactured, assembled and maintained particularly cost-effectively, if the first light module and the second light module are arranged substantially horizontally next to one another and are arranged within a common housing. The adjustment with respect to the alignment of the two light modules and their axial directions can thus be carried out in the manufacture and simplifies the assembly in a vehicle. The horizontal arrangement next to each other is particularly favorable because the two Lichtbüder can be superimposed so advantageous.
    The embodiments according to the invention can be combined with one another, that is to say that the embodiments of the first means can be combined particularly advantageously with the second means. This allows a particularly small design or a particularly good combined heat dissipation can be achieved. Consequently, the combination of the first and second means can result in cost advantages in design, production, assembly and / or maintenance.
    The invention and its advantages are described in more detail below with reference to non-limiting exemplary embodiments, which are illustrated in the accompanying drawings. The drawings show in
    1 is a top view of a vehicle with headlamps according to the invention, FIG. 2 is an exploded perspective view of an embodiment of a first light module,
    3 is an exploded perspective view of an embodiment of a second light module,
    4 is a Blockschaltbüd a headlamp according to the invention,
    5 shows an illustration of a first embodiment of a first partial light distribution of the first light module,
    6 shows an illustration of a first embodiment of an overall light image in which embodiments of a first and second partial light distribution are superimposed,
    7a shows a representation of a second embodiment of an overall light image in which embodiments of a first and second partial light distribution are superimposed,
    7b shows an illustration of a third, enlarged embodiment of an overall light image in which embodiments of a first and second partial light distribution are superimposed,
    8a shows a representation of a fourth, enlarged embodiment of an overall light image for a cornering light function in a neutral position, in which embodiments of a first and second partial light distribution are superimposed,
    8b shows a representation of a fifth, enlarged embodiment of an overall light image for a cornering light function in a first steering angle, in which embodiments of a first and second partial light distribution are superimposed,
    8c is an illustration of a sixth, enlarged embodiment of an overall light image for a cornering light function in a second steering angle, in which embodiments of a first and second partial light distribution are superposed,
    8d is an illustration of a seventh, enlarged embodiment of an overall light image for a cornering light function in a third steering angle, in which embodiments of a first and second partial light distribution are superimposed,
    8e is an illustration of an eighth, enlarged embodiment of an overall light image for a cornering function in a fourth steering angle, in which embodiments of a first and second partial light distribution are superposed,
    8f an illustration of a ninth, enlarged embodiment of an overall light image for a cornering light function in a fifth steering angle, in which embodiments of a first and second partial light distribution are superimposed,
    9a shows an illustration of a tenth, enlarged embodiment of an overall light image for a headlight range control in a first state, in which embodiments of a first and second partial light distribution are superimposed,
    9b shows a representation of an eleventh, enlarged embodiment of an overall light image for a headlight range control in a second state, in which embodiments of a first and second partial light distribution are superimposed,
    9c shows a representation of a twelfth, enlarged embodiment of an overall light image for a headlight range control in a third state, in which embodiments of a first and second partial light distribution are superimposed,
    9d is an illustration of a thirteenth, enlarged embodiment of a
    Overall light image for a headlight range control in a fourth state in which embodiments of a first and second partial light distribution are superimposed,
    10 is an illustration of a thirteenth, enlarged embodiment of a
    Overall light image for a Femlichtfunktion in which embodiments of a first and second partial light distribution are superimposed,
    11a is an illustration of a fourteenth, enlarged embodiment of a
    Overall light image for a light curtain function in a first state in which embodiments of a first and second partial light distribution are superimposed,
    Fig. 11b is an illustration of a fifteenth, enlarged embodiment of a
    Overall light image for a light curtain function in a second state in which embodiments of a first and second partial light distribution are superimposed,
    12 is an illustration of a sixteenth, enlarged embodiment of an overall light image for a left-hand traffic light function in which embodiments of a first and second partial light distribution are superimposed.
    With reference to FIGS. 1 to 12, embodiments of the invention will now be explained in more detail. In particular, important parts are shown for the invention in a headlamp, it being understood that a headlamp contains many other, not shown parts that allow a meaningful use in a motor vehicle, in particular a car or motorcycle. For clarity, therefore, for example, cooling devices for components, control electronics, other optical elements, mechanical adjustment or brackets are not shown.
    In Fig. 1, a vehicle 105 with two Fahrzeugscheinwerfem 100,101, each having two light modules 200, 300; 201, 301, shown in a top view.
    In a built-in state of the headlight 100,101 in a vehicle 105, the first emission direction 250, 251 of the first light image and the second emission direction 350, 351 of the second light image are approximately parallel and the first light image and the second light image in the far region in front of the vehicle at least partially overlap ,
    The first light module 200, 201 and the second light module 300, 301 are arranged substantially horizontally next to each other, it being essential that the two light modules 200, 201; 300, 301 are arranged adjacent, but need not connect directly to each other, and differences in the mounting height, for example, with respect to their geometric centers of the light modules 200, 201; 300, 301, but at least one vertical offset with respect to the geometric centers of both light modules 200, 201; 300, 301 is advantageous. The position between the first light modules 200, 201 and the second light module 300, 301 with one another, that is, which light module is arranged inside or outside, is not important. In addition, the first and second light modules 200, 300 of a vehicle headlight 100 or the first and second light modules 201, 301 of a vehicle headlight 101 can be arranged within a common headlight housing or can also be designed as separate components.
    2 shows the structure of an embodiment of the first light module 200 of a vehicle headlight 100. The first light module 200 is set up to generate a dynamically controllable first partial light distribution 205, 510, the first light module 200 having at least one first light source 210, 211, 212 and at least one first means for generating a first illumination image from the first partial light distribution 205, 510 and at least one first projection optics 230, wherein by means of the at least one first
    Projection optics 230, the first light image as the first light image in a first Abstiahlrichtung 250 is projected onto the street. The first light source 210, 211, 212 are each designed as an LED with at least one light-emitting surface.
    The first means for generating a first light image from the first partial light distribution 205, 510 is a first primary optic 220, which has a plurality of light guide elements 260, 261, 262 and a carrier layer 270.
    The light guide elements 260, 261, 262 are arranged on a rear side of the carrier layer 270 and the illuminated image can be generated on a front side of the carrier layer 270.
    The surface of the front side of the carrier layer 270 preferably follows the Petzval surface of the projection optics 230.
    The light guide elements 260, 261, 262 are juxtaposed in a row in an axial direction and form three lines, and each light guide element 260, 261, 262 has a light entrance surface for coupling light from a light source unit, and a light exit surface for coupling out light ,
    The first light source 210, 211, 212 comprises a plurality of light source elements, each of which is configured to generate individually controllable light that can be coupled into the light entry surfaces of the light guide elements to form a total dynamically controllable light distribution on the support layer 270, which by means of the first Projection optics 230 as the first partial light distribution 205, 510 can be projected onto the road in the first emission direction 250. For the first light module 201 of the second vehicle headlight 101 of the vehicle 105, the embodiments of FIG. 2 apply.
    3 shows the construction of an embodiment of the second light module 300. The second light module 300 is set up to generate a dynamically controllable second partial light distribution 520, the second light module 300 having at least one second light source 310 and at least a second means for generating a second light source Illuminated image from the second partial light distribution 520 and at least one second projection optics 340 includes, which is projected by means of the second projection optics 340 as a second light image in a second radiation direction 350 on the road.
    The second means for generating a second illumination image from the second partial light distribution 520 is a controllable reflector 331, which is further comprised by the second light module 300, 301. The controllable reflector 331 may be an element of an optoelectronic component 330.
    The second light source 310 is configured to emit light and to illuminate in a first propagation direction, in the beam path preferably a second primary optics 320 and the controllable reflector 331 is arranged, and the controllable reflector 331, the light in a second propagation direction in the beam path second projection optics 340 is arranged and oriented in a direction 350 in front of the vehicle, at least partially reflected to form a light distribution in front of the vehicle. The second primary optics 320 may be configured to provide the most homogeneous possible illumination of the controllable reflector 331.
    The controllable reflector 331 comprises an arrangement of a multiplicity of controllable individual mirrors whose reflecting surfaces are arranged in a non-tilted state flat in a first plane and as a rectangular matrix of individual mirrors.
    The light emitted from the second light source 310 falls in the first light
    Propagation direction to the controllable reflector 331 and is reflected by this a first driven state in the direction of the second propagation direction 350 as a second light image and / or reflected in a second controlled state of the controllable reflector in a third propagation direction on the designed as a light trap absorber 360.
    By means of the second projection optics 340, the second illuminated image can be projected as a second partial light distribution 520 onto the street in the second emission direction 350. For the first light module 301 of the second vehicle headlight 101 of the vehicle 105, the embodiments of FIG. 3 apply.
    FIG. 4 shows a block diagram of a vehicle headlight 100 according to the invention. A control unit 110 controls the first light sources 210, 211, 212 of the first light module 200 via a first output unit 120 and the optoelectronic component 330 of the second light module 300 via a second output unit 130. Models for describing light distributions for the respective light modules are in one Memory unit 140 stored and can be retrieved via the control unit 110 to be further processed there, for example in the form of a two-dimensional matrix, via which the respective output units 120,130 are controlled. The two matrices have according to the resolutions of the two light modules 200, 300 jeweüs a different number of rows and columns. For the block diagram of the second vehicle headlight 101 of the vehicle 105, the embodiments of FIG. 4 apply. Both vehicle headlights 100 and 101 can be driven, for example, by a higher-level, common control (not shown), by a projected common light image transmitted through both vehicle headlights 100 and 101 is formed to generate in front of the vehicle 105. Alternatively, for example, a master-slave architecture for the two controls (not shown) of the two vehicle headlights 100 and 101 is possible.
    The following embodiments of light distributions according to the invention apply to both vehicle headlights 100, 101 of the vehicle 105.
    FIG. 5 shows an illustration of a first embodiment of a first partial light distribution 205 of the first light module 200 or 201. A matrix-like light distribution is shown in which brightly illuminated pixels or "pixels" 290 and dark pixels 291 can be seen, which in this example Furthermore, three rows of pixels are recognizable, the upper row forming a high-beam row 280, the middle row an asymmetry row 281, and the lower row a front row row 282. The pixels of the rows run parallel to each other horizontal axis U, which forms a Cartesian coordinate system together with the vertical axis V. It can be seen that the pixels do not necessarily have to have a square shape, but can for example be rectangular in shape and thereby have different dimensions for each row.
    6 shows an illustration of a first embodiment of an overall light image 500 in which embodiments of a first partial light distribution 510 and a second partial light distribution 520 are superimposed.
    The first partial light distribution 510 has a first width 511 in the horizontal direction U and the second partial light distribution 520 has a second width 521 in the horizontal direction U, wherein the first width 511 is greater than the second width 521.
    The first partial light distribution 510 has a first height 512 in the vertical direction V and the second partial light distribution 520 has a second height 522 in the vertical direction V, wherein the first height 512 is greater than the second height 522.
    A pixel 513, 514 of the first partial light image 510, as well as a pixel 523 of the second partial light image 520 can be seen, wherein the area of the pixel 513, 514 is significantly larger than the area of the pixel 523.
    It is favorable if the area of an individually controllable light element or pixel 513, 514 in the light image 510 for the first light module 200, 201 is at least 100 times as large as the area of a pixel 523 in the light image 520 of the second light module 300, 301.
    The first width 511 is at least three times as large as the second width 521.
    The first partial light distribution 510 has a first resolution and the second partial light distribution 520 has a second resolution, the second resolution being higher than the first resolution.
    It can also be seen that a plurality of pixels 523 of the second partial light image 520 of a single pixel of the first partial light image 510 overlap, which is possible due to the higher resolution of the second partial light image 520 compared to that of the first partial light image 510.
    Thus, it is possible that in those areas of the projected common light image in which the first partial light distribution 510 overlaps with the second partial light distribution 520, the brightness of the second partial light distribution 520 in these areas is at least partially reduced. As a result, a homogeneous light distribution within the overall light image 500 can be achieved.
    In addition, it can be achieved that in those regions of the projected common light image in which the first partial light distribution 510 overlaps with the second partial light distribution 520, the brightness of the second partial light distribution 520 in these regions is at least partially adjusted such that local brightness differences in this area, which are called forth by the second partial light distribution 520 ago reduced. Thereby, a homogeneous light distribution within a pixel 514 of the first partial light distribution 510, in which an overlap with pixels 523 of the second partial light distribution 520 is given, can be achieved.
    In order to achieve an improvement in the homogeneity of the overall light image 500, it is necessary to detect the points at which inhomogeneity arises in order to reduce or correct this in a targeted manner by a corresponding activation of the second light module 300, 301. For this purpose, it may be necessary to generate calibration data from sensor data of an optical sensor, which comprise the generated light image of the first partial light distribution 510, the resolution of the optical sensor at least corresponding to that of the second partial light distribution 520, and the calibration data in a memory are stored and by a control device, which controls the controllable reflector 331 electrically, are taken into account in a determination of the second partial light distribution 520.
    Devices for detecting a light distribution of a light image are familiar to the person skilled in the art.
    7 a shows a representation of a second embodiment of an overall light image 500 (a light distribution for high beam 600), in which embodiments a first partial light distribution 510 (a high beam light distribution 600) and a second split light distribution 520 (a high beam light distribution 600 ) are superimposed. It can be seen that the width of the first partial light distribution 510 (600) is significantly greater than that of the second partial light distribution 520 (600).
    FIG. 7b shows an illustration of a third, enlarged embodiment of an overall light image 500 (a light distribution for low beam 550) in which embodiments of a first partial light distribution 510 (550) and second partial light distribution 520 (550) are superimposed , The low beam light distribution 550 has an asymmetry contour 580 (550). From the figure it is clear that the low resolution of the first partial light distribution 510 (550) at the edges of the illumination image is sufficient, whereas in the field of vision of the driver in front of the vehicle a high precision in the representation of the asymmetry contour 580 (550) is advantageous because within the statutory provisions, the largest possible lighting area can be exploited and the driver optimum illumination of the road can be created.
    FIGS. 8a to 8f show enlarged embodiments of an overall light image 500 for a cornering light function 551, 552, 553, 554, 555, 556 in corresponding steering angles, in which corresponding embodiments of a first partial light distribution 510 (551, 552, 553, 554, FIGS. 555, 556) and second partial light distribution 520 (551, 552, 553, 554, 555, 556) are superimposed. Furthermore, an asymmetry contour 580 (551, 552, 553, 554, 555, 556) can be seen in each case for different steering angles of the cornering light function 551, 552, 553, 554, 555, wherein the contour is formed by the second light module 300, which has a high resolution and can reproduce a sharp contour. The asymmetry contour 580 (551, 552, 553, 554, 555, 556) has an increasing angle of the contour. By the curve light function shown can be achieved that a maximum illumination of the roadway is achieved within the legal provisions, for example, for a low beam function. Further, the continuous change in the angle of the asymmetry contour 580 (552, 553, 554, 555) from a starting value of the angle, for example 30 ° or as readable in the asymmetry contour 580 (552), to a vertical end value of the angle felt by the driver as pleasant, as in a sudden change of the angle.
    FIGS. 9a to 9d show enlarged embodiments of an overall light image 500 for a headlamp adjustment 590, 591, 592, 593 in corresponding states, in which corresponding embodiments of a first partial light distribution 510 (590, 591, 592, 593) and second partial light distribution 510 are shown. Light distribution 520 (590, 591, 592, 593) are superimposed.
    10 shows an enlarged embodiment of a total light image 500 for a high beam 601, in which a corresponding embodiment of a first partial light distribution 510 (601) and second partial light distribution 520 (601) are superimposed.
    FIGS. 11a to 11b show enlarged embodiments of an overall light image 500 for a light curtain function 610, 611 in corresponding states in which corresponding embodiments are superimposed on a first partial light distribution 510 (610, 611) and second partial light distribution 520 (610, 611) are. An asymmetry contour 580 (610, 611), as well as a height contour 560 (610, 611) and a width contour 570 (610, 611) can be seen, which define a detailed course of the light function of a light curtain 610, 611.
    12 shows an enlarged embodiment of a total light image 500 for left-turn traffic light function 556 in which a corresponding embodiment of a first sub-light distribution 510 (556) and second sub-light distribution 520 (556) are superimposed. Furthermore, an asymmetry contour 580 (556) can be seen, which is oriented on a road in accordance with the traffic on the left.
    List of Reference Signs: U horizontal axis V vertical axis 100, 101 vehicle headlight 105 vehicle 110 control unit 120 first output unit 130 second output unit 140 storage unit 200, 201 first light module 205 light distribution of the first light module 210, 211, 212 first light source 220 first primary optic 230 first projection optics 250, 251 first emission direction 260, 261, 262 light guide elements 270 carrier layer 280 high-beam row 281 asymmetry row 282 leading row 290 illuminated spot 291 dark spot 300, 301 second light module 310 second light source 320 second primary optic 330 optoelectronic component 331 controllable reflector 340 second projection optic 341 partial optics 350, 351 second radiation direction 360 absorber 500 light image 510 first partial light image 511 first width of the first partial light image 512 first height of the first partial light image 513, 514 pixels of the first partial light image 520 second partial light image 521 second width of the second part Light picture 522 second height of second partial image 523 pixels of second partial image 550, 551, 552, 553, 554, 555, 556 distribution of light for dipped beam 560 height contour of light curtain 570 width of light curtain 580 asymmetry contour 590, 591, 592, 593 Light distribution for headlight range adjustment 600, 601 Light distribution for main beam 610, 611 Light distribution for light curtain
    权利要求:
    Claims (9)
    [1]
    claims
    A vehicle headlight (100, 101) comprising at least two light modules (200, 300, 201, 301), characterized in that a first light module (200, 201) is arranged to generate a dynamically controllable first partial light distribution (205, 510) wherein the first light module (200, 201) has at least one first light source (210, 211, 212) and at least one first means for generating a first light image from the first part light distribution (205, 510) and at least one first projection optics (230). comprises, by means of the at least one first projection optics (230), the first light image as a first light image in a first emission direction (250, 251) is projected onto the road, and a second light module (300, 301) is set up, a dynamically controllable second part Light distribution (520), wherein the second light module (300, 301) at least one second light source (310) and at least a second means for generating a second light image from the second part-L light distribution (520) and at least one second projection optics (340), wherein by means of the second projection optics (340) as a second light image in a second radiation direction (350, 351) is projected onto the road, and in an installed state of the headlight (100,101) in a vehicle, the first emission direction (250, 251) of the first light image and the second emission direction (350, 351) of the second light image are approximately parallel and the first light image and the second light image in the far region in front of the vehicle at least partially overlap, wherein the first Partial light distribution (205,510) has a first width (511) in the horizontal direction (U) and the second partial light distribution (520) has a second width (521) in the horizontal direction (U), wherein the first width (511) larger is as the second width (521), and / or the first partial light distribution (205, 510) has a first height (512) in the vertical direction (V) and the second partial light distribution (205, 510) Light distribution (520) has a second height (522) in the vertical direction (V), wherein the first height (512) is greater than the second height (522).
    [2]
    2. Vehicle headlight (100,101) according to claim 1, characterized in that the first width (511) is at least three times as large as the second width (521), and / or the first height (512) is at least twice as large as the second Height (522).
    [3]
    3. Vehicle headlight (100,101) according to any one of claims 1 or 2, characterized in that the first partial light distribution (205, 510) has a first resolution and the second partial light distribution (520) has a second resolution, wherein the second resolution is higher than the first resolution, preferably at least ten times higher.
    [4]
    4. Vehicle headlight (100,101) according to one of claims 1 to 3, characterized in that the first means for generating a first light image from the first partial light distribution (205, 510) is a first primary optics (220) having a plurality of light guide elements (260, 261, 262) and a carrier layer (270), wherein the light guide elements (260, 261, 262) are arranged on a rear side of the carrier layer (270), and on a front side of the carrier layer (270) the illumination image can be generated and the light guide elements (260, 261, 262) are arranged adjacent to one another or overlapping in a row in an axial direction and form at least one line, and each light guide element (260, 261, 262) has a light entry surface for coupling light from at least one light source unit, and a light exit surface for coupling out light, and the first light source (210, 211, 212) has a plurality of light source elements each configured to generate individually controllable light which can be coupled into the light entry surfaces of the light guide elements to form a total dynamically controllable light distribution on the support layer (270), by means of the first projection optics (230) as a first partial light distribution (205, 510) can be projected onto the road in the first emission direction (250).
    [5]
    5. Vehicle headlight (100,101) according to one of claims 1 to 4, characterized in that the second means for generating a second light image from the second partial light distribution (520) is at least one controllable reflector (331), the second light module (300 , 301), wherein the second light source (310) is arranged to emit light and to illuminate in a first propagation direction, in the beam path of the controllable reflector (331) is arranged, and the controllable reflector (331) the light in a second Propagation direction, in the beam path, the second projection optics (340) is arranged and oriented in a direction (350, 351) in front of the vehicle, at least partially reflected to form a light distribution in front of the vehicle, and the controllable reflector (331) an arrangement of Variety of controllable individual mirrors whose reflective surfaces in a non-tilted state plan in a first plane and as rechteckf are arranged in the first propagation direction on the controllable reflector (331) and is reflected by this a first driven state in the direction of the second propagation direction and / or in a second controlled state of the controllable reflector in a third propagation direction is reflected as a second light image, and by means of the second projection optics (340) the second light image as a second partial light distribution (520) on the road in the second radiation direction (350, 351) is projected ,
    [6]
    6. A vehicle headlight (100, 101) according to one of claims 1 to 5, characterized in that in those regions of the projected common light image in which the first partial light distribution (205, 510) overlaps with the second partial light distribution (520), the brightness of the second partial light distribution (520) is at least partially reduced in these areas.
    [7]
    Vehicle headlight (100, 101) according to one of claims 1 to 6, characterized in that in those regions of the projected common light image in which the first partial light distribution (205, 510) overlaps with the second partial light distribution (520), the brightness of the second partial light distribution (520) in these areas is at least partially adjusted such that local brightness differences in this area, which are caused by the second partial light distribution (520), are reduced.
    [8]
    8. Vehicle headlight (100,101) according to one of claims 1 to 7, characterized in that calibration data can be created from sensor data of an optical sensor, which comprise the generated light image of the first partial light distribution (205, 510), wherein the resolution of the optical sensor at least that of the second partial light distribution (520) corresponds and the calibration data are stored in a memory and are taken into account by a control device, which electrically controls the controllable reflector (331), in a determination of the second partial light distribution (520).
    [9]
    9. Vehicle headlight (100,101) according to one of claims 1 to 8, characterized in that the first light module (200, 201) and the second light module (300, 301) are arranged substantially horizontally next to each other.
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    同族专利:
    公开号 | 公开日
    DE102017129254A1|2018-07-26|
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    CN108343925A|2018-07-31|
    CN108343925B|2021-02-09|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50041/2017A|AT519462B1|2017-01-24|2017-01-24|vehicle headlights|ATA50041/2017A| AT519462B1|2017-01-24|2017-01-24|vehicle headlights|
    DE102017129254.3A| DE102017129254A1|2017-01-24|2017-12-08|vehicle headlights|
    CN201810062537.9A| CN108343925B|2017-01-24|2018-01-23|Vehicle headlight|
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