• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A vehicle headlight (1) comprising a light source (2), a projection optical system (4), a control device (5), an output unit (6), and an optoelectronic component (7), which comprises a controllable arrangement of a plurality of individually adjustable optoelectronic elements ( 8) in the form of a two-dimensional matrix. At least one light model (20) which defines a light distribution (21, 21 ') with a luminous area (22, 22') is stored in the control device (5). The control device (5) is set up to determine a two-dimensional light matrix (23, 23 ') from the light model (20) and to arrange the light matrix (23, 23') within a two-dimensional image matrix (25, 25 ') as a function of a position parameter , The image matrix (25, 25 ') can be imaged onto the optoelectronic component (7) by means of the output unit (6). The image matrix (25, 25 ') describes an area which is larger, preferably at least twice as large, particularly preferably at least three times larger than the area which describes the light matrix (23, 23') or the image matrix (25 , 25 ') describes an area which is smaller, preferably at most half as large, particularly preferably at most one third, as large as the area which describes the light matrix (23, 23').
    公开号:AT518724A1
    申请号:T50533/2016
    申请日:2016-06-13
    公开日:2017-12-15
    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 one light source, at least one projection optics, at least one control device, at least one output unit and at least one optoelectronic component comprising a controllable arrangement of a plurality of individually adjustable optoelectronic elements in the form of a two-dimensional matrix, wherein an image resolution by the product is defined by the number of rows and columns of the matrix, and the vehicle headlight is adapted to emit light from the at least one light source in the direction of the at least one optoelectronic component and to modulate by means of the at least one optoelectronic component and at least partially in the direction of at least one projection optics to radiate and form a light image in front of the vehicle, wherein the at least one control device is connected to the at least one output unit, and the at least one output unit with the at least one optoelectronic component is connected and can drive the optoelectronic elements.
    Furthermore, the invention relates to a method for generating a light distribution in front of a vehicle by a vehicle headlight of the aforementioned type.
    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 "carriageway" 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 is based on a projection on a vertical surface according to the relevant standards relating to automotive lighting technology.
    In order to meet this stated need, among other things, headlamps have been developed in which a variably controllable reflector surface is formed from a plurality of micromirrors and reflects a light emission generated by a light source in the emission direction of the headlamp. Such lighting devices are in
    Vehicle construction advantageous because of their very flexible light functions, since the illumination intensity can be controlled individually for different light 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 motorway light distribution, a bend light distribution, a high beam light distribution or the image of glare-free high beam. 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 that contains the rectangular array 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 spatial light modulator (SLM) which consists of matrix-shaped micro-mirror actuators, that is to say tiltable reflecting surfaces, for example with an edge length of approximately 16 gm. The mirror surfaces are constructed such that they pass through the action of electrostatic fields are mobile. Each micromirror is individually adjustable in angle and usually has two stable end states, which can be changed within a second up to 5000 times. For example, the individual micromirrors can each be controlled by a pulse width modulation (PWM) in order to image further states of the micromirrors in the main beam direction of the DMD arrangement 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
    In such vehicle headlights, which can project several different high-resolution light distributions on the roadway in front of the vehicle, there is, for example, when switching between different light distributions to significant control and computational effort, including when a new light distribution is retrieved from a memory and these processes in real time be executed within a very short time window. Micromirror array controllers are often implemented as "embedded systems." Often, such embedded systems are specifically tailored to a task, and for cost reasons, an optimized, mixed hardware-software implementation is chosen, so in practice, computing power and available memory are often limited. It is often unfavorable to use an additional external memory, since not only the memory itself causes costs, but also the complexity of the "embedded system" is significantly increased, or in the certification required for automotive applications is not available on the market.
    It is an object of the invention to overcome the disadvantages mentioned.
    The object is achieved by a headlamp of the type mentioned in that according to the invention in the at least one control device at least one light model which defines a light distribution with a luminous area preferably in the form of a rectangle is stored, and the at least one control device is set up the light model to determine a two-dimensional light matrix and to arrange the light matrix depending on a position parameter at least partially within a two-dimensional image matrix and the image matrix can be imaged by means of the at least one output unit on the at least one optoelectronic component.
    Due to the aforementioned positioning of the light matrix within the image matrix, which is determined by the position parameter, it can be achieved that a stored light model can be used to be radiated in different directions in front of the vehicle by the vehicle headlight according to the invention. This has the advantage that a manual adjustment of the vehicle headlight after assembly in a vehicle can be at least partially eliminated and the adjustment can be performed software controlled. In other words, a "virtual" pivoting of the vehicle headlight can be achieved, and secondly, the software-controlled displaceability of the lighting direction ensures that the control and computation effort required to adapt the light distribution can be kept to a minimum The overlay can be additive, which means that the image matrix can comprise a basic light distribution or can not provide a basic light distribution , comprises a desired light distribution, but which according to the current driving situation is suitably arranged within the image matrix by adding the values of the two matrices or the values of the light matrix, the values of the image matrix at the desired position, which are determined by the Position parameter is determined to be overwritten. The required mathematical operators are particularly easy to execute and do not require complex programming routines in the program code. If the light matrix is swiveled dynamically during the drive of the vehicle, care must be taken that before the light matrix is rearranged according to the current position parameter, the previously calculated image matrix into which the previously used light matrix has been embedded is removed. This can be done, for example, such that the previously used light matrix is subtractively removed using the previously used position parameter. Alternatively, the original shape, that is the basic setting of the image matrix, may be stored separately, for example as a basic matrix which corresponds to the size of the image matrix, in order to reassemble the image matrix from the basic matrix and the light matrix. As a result, the computational effort can be further reduced, with the storage requirement rising in return.
    Furthermore, the object is achieved by a method of the type mentioned above, that according to the invention, a pig launcher as described above generates a light distribution of the type mentioned. The advantages resulting from the method correspond to those of the vehicle headlight according to the invention, so that only the advantages of the vehicle headlight are subsequently implemented and the advantages achieved also apply correspondingly to the method according to the invention.
    It is advantageous if the image matrix describes an area that is larger, preferably at least twice as large, particularly preferably at least three times as large as the area that describes the light matrix. As a result, it is possible to achieve that the area within which the vehicle headlamp can be pivoted is particularly large, and areas can also be illuminated by the vehicle headlamp, which may be situated away from the roadway on which the vehicle is located. If the area described by the image matrix is larger in the vertical direction than the area which is described by the light matrix, the headlight range of the vehicle headlight, for example, can be adjusted. If the area which is described by the image matrix in the horizontal direction is greater than the area which is described by the light matrix, then for example the lane of the vehicle headlight to be illuminated can be adjusted.
    It is also advantageous if the image matrix describes an area which is smaller, preferably at most half as large, particularly preferably at most one third, as large as the area which describes the light matrix. It can thereby be achieved that a very large-area light distribution can be defined by the light distribution and this light distribution nevertheless extends to the edge of the image matrix, even if the light matrix is positioned at the edge of the image matrix, as for example in the case of a curve light function.
    The advantages of the invention can be achieved particularly easily if the at least one light model defines a light distribution for a vehicle headlight, preferably a light distribution of a low beam or a high beam. This is therefore the case, as can be particularly easily adapted to additional lighting requirements that may be required, for example due to a particular traffic situation or a changed installation position in a vehicle by the said two light distributions, which are most often used in the operation of a vehicle.
    In a preferred embodiment of the invention, different loading states of the vehicle in the orientation of the vehicle headlight can be taken into account by changing the position parameter depending on the loading state of the vehicle, wherein the light matrix within the image matrix is preferably displaced vertically, whereby a vertical misalignment of the emission direction of the vehicle headlights , which can be caused by an increased payload at the rear of the vehicle, can be corrected.
    In a preferred embodiment of the invention, the position parameter is changed as a function of the steering angle of the vehicle, wherein the light matrix within the image matrix is preferably displaced horizontally and preferably a cornering light function of a vehicle headlight can be formed. The thus corrected emission direction of the vehicle headlights can consequently illuminate following the course of the road, which is determined by the impact of the steering wheel of the vehicle.
    Alternatively or additionally, in a further development of the invention from navigation data or maps of the course of the road, the curve can be determined and the position parameter changed depending on the curve thus determined, wherein the light matrix within the image matrix is preferably moved horizontally and preferably a cornering light function or a headlight range of Vehicle headlights can be formed. The thus executed cornering function or headlamp leveling this can be activated and used much earlier, before the vehicle or the driver has to respond to the road. As a result, the security aspect is further improved by the created light function.
    In a further preferred embodiment of the invention, the position parameter is changed as a function of the course of the road, which can preferably be determined from navigation data of the vehicle, wherein the light matrix within the image matrix is preferably displaced vertically. From navigation data, the course of the road can be seen, which lies directly in front of the vehicle. Thus, terrain hills or terrain subsidence, especially long straight course of the road can be detected in advance. This information can be passed to the vehicle headlights to adjust this to the lying in front of the vehicle sections.
    In the case of a vehicle in front of the terrain crest, the vehicle headlights can be adjusted, the direction of emission of the vehicle headlights is lowered in order not to dazzle oncoming traffic over charge.
    In the case of an off-highway or in the case of a straight line section in front of the vehicle, the vehicle headlights may be adjusted, with the direction of emission of the vehicle headlights being raised to improve visibility for the driver of the vehicle.
    In a further preferred embodiment of the invention, the position parameter is changed as a function of the driving speed of the vehicle, wherein the light matrix within the image matrix is preferably displaced vertically. Consequently, the vehicle headlights can be adjusted with the radiation direction of the vehicle headlights being raised to improve the higher speed visibility for the driver of the vehicle.
    In a further preferred embodiment of the invention, the position parameter depending on the weather in the environment of the road, in particular by the temperature, the humidity or the visibility conditions for the driver, which are determined by vehicle sensors, changed, the light matrix within the image matrix preferably is moved vertically. By the weather-dependent adjustment of the emission direction of the vehicle headlights can be achieved that the view for the driver of the vehicle is improved by the emission direction of the vehicle headlights is raised or lowered.
    The prevailing weather conditions for the vehicle can be determined by various sensors on the vehicle. The temperature can be determined by temperature sensors and the humidity either by appropriate sensors or, for example, indirectly by the use status of windshield wipers. The visibility conditions can be determined, for example, by control sensors. Alternatively, the weather conditions, such as black ice warnings, fog warnings or snow reports, for example, weather services can be electronically transmitted via a mobile data connection to the vehicle and used to perform a weather-dependent adjustment of the vehicle headlights.
    In a further preferred embodiment of the invention, the position parameter is changed as a function of traffic messages that can be received by receiving devices of the vehicle, wherein the light matrix within the image matrix is preferably displaced vertically. Thus, the current traffic situation, such as congestion with stop & go traffic, on the way located special transporter accident areas, etc. are electronically transmitted via a mobile data connection to the vehicle and used to perform a traffic-dependent adjustment of the vehicle headlights.
    As a mobile data connection of the vehicle mobile communications are preferably according to the GSM, 3G / UMTS, 4G / LTE or 5G mobile radio standard suitable, but also vehicle-to-vehicle connections to the IEEE 802.11p standard (WAVE, "Wireless Access in Vehicular Environment") or after the standard ETSI / CEN ITS-G5 standard (IEEE 1609) or the SAE standard J2735, which means that the positional parameter can be either BSM (Basic Satefy Message), CAM (Cooperative Awareness Message) or DENM (Decentralized Awareness Message). ) Messages are controlled. In principle, other radio standards are also suitable, such as according to the CEN / ISO DSRC standard ("Dedicated Short Range Communication") in the 5.8 GHz microwave and infrared range.
    For example, traffic messages may also be received in the vehicle via TMC ("Traffic Message Channel"), which radio stations frequently broadcast for the transmission of traffic news
    It is clear that the mentioned dependencies of the position parameter can be combined with each other. For example, a combination of the aforementioned curve light function with a speed-dependent position parameter is possible.
    Using DLP® projection technology, it is possible to project not only flexible light distributions on the road surface of the vehicle, but also light functions in the form of targeted information ("Advanced Information Beam ™", AIB ™), such as traffic signs, warnings (warning triangles It is particularly advantageous if this projected information can be quickly adapted to the current situation on the road or within the navigation In a further aspect of the invention, at least one light model is represented by a matrix of Defining brightness values of a light distribution, which preferably corresponds to the light matrix, can be defined very variably by this particularly simple definition of a light model, which, however, entails an increased storage requirement.
    In addition, at least one light model can be described by a two-dimensional lunction, which is defined by a multiplicity of interpolation points which define brightness values of a light distribution, which is advantageous since the required storage space for storing a light distribution in the control device can be substantially lower.
    In a further development, the two-dimensional lunction is imaged by interpolation between the support points in the light matrix, which is particularly advantageous because evenly distributed light distributions can be generated with low memory requirements.
    It is extremely advantageous if the at least one light source comprises a semiconductor light emitting diode, in particular a high current light emitting diode or a laser diode, since a small size can be achieved in the vehicle headlight. In addition, the light is generated with high efficiency and reduces the waste heat of the light source, which is very important especially when using temperature-sensitive AMDs or DMDs.
    The invention and its advantages are described in more detail by means of non-limiting exemplary embodiments, which are illustrated in the accompanying drawings. The drawings show in:
    1 is a perspective view of a first embodiment of a vehicle headlamp according to the invention,
    2 is a perspective view of a second embodiment of a vehicle headlamp according to the invention,
    3 is a front view of an optoelectronic component with an enlarged detail of contained optoelectronic elements,
    4 shows a block diagram of a vehicle headlight according to the invention,
    5 shows a time profile of signals for controlling the optoelectronic component according to FIG. 4, FIG.
    6 is a perspective view of a calculated light distribution of a vehicle headlamp according to the invention,
    7 shows a representation of a light distribution of a vehicle headlight according to the invention,
    8 shows an illustration of a picture matrix of a vehicle headlight according to the invention, FIG. 9 shows a representation of a variable low beam light distribution of a vehicle headlight according to the invention in a straight-ahead position,
    10 is an illustration of a low beam light distribution of a cornering light with a vehicle headlamp according to the invention,
    11 is an illustration of a variable high beam light distribution of a vehicle headlamp according to the invention in a straight-ahead position,
    12 is an illustration of a low beam light distribution of a cornering light with a vehicle headlamp according to the invention,
    13 is an illustration of a low beam light distribution in which the area of an oncoming vehicle is not illuminated,
    14 shows a representation of a low-beam light distribution in which an animal moves in the direction of the road,
    Fig. 15 is an illustration of a low beam light distribution in which information is projected into the area.
    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.
    The exemplary embodiments also illustrate the method according to the invention for generating a light distribution in front of a vehicle by a vehicle headlight of the type described here. It is clear that the exemplary embodiments and their features individually depict the invention and can also be combined with one another or with one another. For example, a combination of a cornering light function with a function for controlling the light emission direction as a function of the load state of the vehicle and the route of the road is very practical.
    Fig. 1 shows a first embodiment of a Fahrzugscheinwerfers 1 according to the invention. A light source 2, which may contain, for example, a light-emitting diode or power LED and a primary optics 3 for focusing a light beam, is set up to illuminate an optoelectronic component 7.
    The optoelectronic component 7 may comprise a plurality of optoelectronic elements 8 arranged in a two-dimensional matrix. In this first embodiment, the optoelectronic elements 8 are individually controllable micromirrors, in which the reflection effect of each individual element of the matrix is variably adjustable (for example, an AMD or DMD).
    The optoelectronic component 7 can reflect the incident light in the direction of a projection optical system 4, wherein the controlled matrix elements individually adjust their reflection factor by modulation of the angles of the micromirrors and modulate a desired light distribution onto the incident light beam. The projection optics 4 is oriented in the emission direction of the vehicle headlight 1 and thus produces the desired light distribution in front of the vehicle.
    The control of the optoelectronic component 7 is carried out by the drive unit 9, in which a desired light distribution can be calculated and output to the required control of the optoelectronic elements 8 in the form of control signals to the optoelectronic component 7.
    Fig. 2 shows a second embodiment of a Fahrzugscheinwerfers 11 according to the invention. A light source 12, which may contain, for example, a light-emitting diode, high-current LED (power LED) or a laser diode and a primary optics 13 for focusing the light beam emanating from the light source 12, is set up to illuminate an optoelectronic component 17.
    The optoelectronic component 17 comprises a plurality of optoelectronic elements arranged in a two-dimensional matrix. In this second embodiment, the optoelectronic elements 8 are individually controllable translucent elements, in which the light transmission effect of each individual element of the matrix is variably adjustable (for example, an LCD).
    The optoelectronic component 17 can transmit the incident light in the direction of a projection optical system 14, wherein the controlled matrix elements individually adjust their light transmission and modulate a desired light distribution onto the incident light beam. The projection optics 14 is oriented in the emission direction of the vehicle headlight 11 and thus produces the desired light distribution in front of the vehicle.
    The control of the optoelectronic component 17 is effected by the drive unit 19, in which a light distribution can be calculated and the necessary control of the optoelectronic elements, for example the pixels of an LCD, are output to the optoelectronic component 17 in the form of control signals
    In addition to the variants of the optoelectronic component 7, 17 shown in FIG. 1 and FIG. 2, it is of course also possible to use other technologies which enable a corresponding modulation of the light. For the sake of completeness, LCoS systems (LCoS, "Liquid Crystal on Silicon") should therefore also be mentioned.
    The modulation of the light allows a segmentation of the light distribution on the road, that is, the light distribution projected onto the roadway can be controlled individually for different solid angles. For a light image projected on a roadway, the number of segments that can be controlled individually by a vehicle headlight according to the invention is important in order to generate light distributions that are individually adapted for different driving situations. The number of these segments depends, for example, on the number of micromirrors and is, for example, 854 × 480 micromirrors or pixels in a rectangular matrix arrangement.
    If two headlights are used for vehicles, the segments can be strung together and the number of segments doubled. Usually, in the installation position of the vehicle headlamp more segments in the horizontal direction than in the vertical direction are needed. For this reason, in practice, the light distributions segmented by the optoelectronic components are frequently strung together by two vehicle headlights on the short sides of the matrix arrangement, thus doubling the horizontal resolution.
    It is also a complete or even partial overlay or overlap of two or more light distributions possible, for example, to achieve a stronger contrast in image areas.
    FIG. 3 shows an example of an optoelectronic component 7 in the form of a DMD in front view. An enlarged image section shows optoelectronic elements 8 arranged in matrix form, which comprise individually controllable micromirrors, in which example every second micromirror is tilted.
    FIG. 4 shows an electrical block diagram of the vehicle headlight 1 according to the invention. A control device 5 can calculate a light distribution in the form of image data 25, 25 'from a light model 20 and output it to the optoelectronic component 7 via an output unit 6 in the form of video signals 26. The control device 5 forms, together with the output unit 6, the drive unit 9 to which the optoelectronic component 7 is connected. The control device 5 can generate a light matrix 23, 23 'from at least one light model 20, subsequently calculate at least one position parameter 24, 24' a light distribution in the form of an image matrix as image data 25, 25 'and via an output unit 6 in the form of video signals 26 output the optoelectronic component 7. The memory required by the controller 5 may be located both on a microprocessor chip and on a separate chip or memory chip. In addition, the control device 5 may comprise an interface via which, for example, light models 20 can be transmitted to the control device 5.
    FIG. 5 shows signal curves in the time domain for a data signal S1 and a V-sync control signal S2 with synchronization pulses VI, VI 'of a video signal. The control device 5 repeatedly performs recalculations of the desired light distribution in order to cope with the respective driving situation of the vehicle and to calculate the respectively required light distribution. The control device 5 transmits the calculated light distribution in the form of an image matrix 25 to the output unit 6, which in turn transmits the image data in the form of video signals 26 comprising a data signal S1 and a V-sync signal S2 to the optoelectronic component 7. Often, video signals 22 have a signal frequency to achieve, for example, a refresh rate of, for example, 25 frames per second. For illustration, two consecutive time windows TI and T2 are shown in FIG. The time window TI starts with an end of transmission of image information and lasts until the beginning of the transmission of subsequent image information of the image data 21 in the data signal S1. The time window T2 begins after the end of the time window TI and lasts until the end of the transmission of image information from the image data 21 in the data signal S1.
    In other words, the output unit 6 is adapted to transmit image signals by means of at least one data signal Sl to the optoelectronic component 7,17 and the at least one data signal Sl includes a time window T2 which is between a front signal shoulder PI and a rear signal shoulder P2 the picture information PIC is located in the data signal Sl. The time window TI is located between a rear signal shoulder P2 of the image information PIC and a front signal shoulder PI 'of the subsequent image information PIC' in the data signal S1.
    Any driving situation may require a recalculation of the light distribution, for example when a driver of a vehicle changes from a low beam function to a high beam function of the vehicle headlight. This change must take place very rapidly, whereby the computing capacity of the control device 5 required for this process should be taken into account. It is particularly advantageous if the calculation of the situation light distribution in the time window TI is performed, since at this time no image data is transmitted and computing capacity can be available on the part of the control device 5. The time window TI is between each rear signal shoulder P2 ("back porch") and front signal shoulder PI '("front porch"). Depending on a desired image refresh rate, only a few milliseconds remain in the time window TI for calculating the light distribution. For example, for a video signal comprising 640x480 pixel image information and a refresh rate of 60Hz, the time window TI is approximately 1.4ms between the rear signal shoulder P2 of FIG
    Image information PIC and the front signal shoulder PI 'of the subsequent image information PIC.
    FIG. 6 shows a spatial representation of an example of a calculated light distribution, for example that of a high beam. On the axes of the coordinate system shown, the horizontal and vertical positions of the respective brightness value (or dimming value) plotted on the axis ZA are shown on the axes XA and YA.
    Other light distributions are just as possible as the light distribution of a low beam, a cornering light, etc.
    The light distribution can be described by interpolation points. Each interpolation point comprises, for example, a data set (X, Y, Z), where Z is the desired brightness value in the position (X, Y). By interpolation between the interpolation points further brightness values can be calculated. The light distribution can be described by interpolation points, whereby further function values can be calculated, for example, by interpolation between the interpolation points. There are different interpolation possible. When using a linear interpolation, the slopes between the nodes are calculated and when calculating points that lie between the individual nodes, the respective equal slopes are used to make the calculation itself particularly easy. This may be necessary if the computing capacity of the control device 5 is limited. The time window TI is particularly favorable for the calculation and can be advantageously used by performing calculations for light distributions in the time window TI.
    The values of the individual matrix elements of the optoelectronic component 7, 17 can correspond to an absolute or relative brightness in the calculated light distribution. Furthermore, the values may correspond to a setting value of a respective optoelectronic element 8, for example values between 0 and 255, the reflection factor or brightness values or dimming values between 0% for dark or 100% for light. Depending on the definition of these values, which is predetermined by the DMD system , it may be necessary for the optoelectronic component 7 to adapt to setting ranges of the optoelectronic elements 8.
    In some DMD systems, the modulation of the light by high-frequency tilting of the respective micromirrors takes place in the sense of pulse width modulation (PWM), wherein the duty cycle is adjusted, for example, for a dimming of 70%, the micromirrors in tact 70 / Alternatively, the setting values of the individual matrix elements of the optoelectronic component 7, 17 can correspond to the positions of micromirrors or tilting frequencies of the micromirrors.
    FIG. 7 shows, by way of example, a high-resolution light distribution of a low beam on a road produced by the arrangement according to the invention, dark areas being shown for areas of high brightness. The illustration shown is therefore inverse to a brightness distribution.
    FIG. 8 shows a light model in the form of a light distribution 21 (here a low beam light distribution is shown), which has a luminous area 22. The light model 20 can be described by a light matrix 23. The border of the image matrix 25 shows the adjustment area of the shift range of the light matrix 23 within the image matrix 25 and thus the adjustment range of the vehicle headlight. A position parameter 24 refers to the position of the light matrix 23 within an image matrix 25 in which the light matrix 23 is arranged.
    The arrows L and R indicate how the light matrix 23 can be shifted within the image matrix 25 in order, for example, to convert the function of a curve light. The position parameter 24 in this example defines the position of the upper left corner of the light matrix 23 within the image matrix 25. Of course, it is freely selectable which reference point of the light matrix 23 is used for the positioning. It can therefore be selected whether the position parameter 24 references a corner or the center or any other location of the light matrix 23.
    Fig. 9 and Fig. 10 show the function of a cornering light with a low beam light distribution, which is vertically displaceable according to the arrows L and R on a straight and curved route of the road.
    Fig. 11 and Fig. 12 show the function of a cornering light with a high-beam light distribution, which is vertically displaceable according to the arrows L and R on a straight and curved route of the road.
    In this case, the position parameter 24 as a function of the steering angle of the vehicle can be changed, wherein the light matrix 23 is preferably horizontally displaced within the image matrix 25 and preferably a cornering light function of a vehicle headlight can be formed.
    Alternatively, the vehicle headlamp according to the invention can be used to provide light functions, wherein the position parameter 24 depending on • the load condition of the vehicle or • the road, which is preferably determined from navigation data of the vehicle, or • the driving speed of the vehicle, or • the weather in the environment of the road, in particular by the temperature, the humidity or the visibility conditions for the driver, which can be determined by vehicle sensors, or • traffic information that can be received by receiving devices of the vehicle is changed, the light matrix 23 within the image matrix 25 is preferably moved vertically. These examples are not shown separately.
    The current traffic situation, such as congestion with stop & go traffic, special transporters on the way, accident areas, etc. can be transmitted electronically via a mobile data connection to the vehicle and used to perform a traffic-dependent adjustment of the vehicle headlights.
    In addition, lighting functions can be controlled depending on the distances to other vehicles. For example, position data of other vehicles can be received via radio link if these vehicles send messages according to the IEEE 802.11p standard CENITS-G5 standard (IEEE 1609) or to the SAE standard J2735. In BSM ("Basic Satefy Message"), CAM ("Cooperative Awareness Message") or DENM ("Decentralized Awareness Message") messages according to the said standards, each position and dimensions of the sending vehicles are included and are usually updated every 100 ms Posted.
    FIG. 13 shows an alternative embodiment to that of FIG. 8, in which a light model in the form of a light distribution 2Γ (here a low-beam light distribution is shown) is shown, which has a luminous area 22 '. The light model 20 'can be described by a light matrix 23'. The border of the image matrix 25 'shows the adjustment or displacement range of the light matrix 23' within the image matrix 25 'and thus the adjustment range of the vehicle headlight. A position parameter 24 'refers to the position of the light matrix 23' within an image matrix 25 'in which the light matrix 23 is arranged.
    Here, the image matrix 25 'describes an area smaller than the area describing the light matrix 23'. It can thereby be achieved that a very large-area light distribution is defined by the light distribution 21 '.
    FIG. 14 shows a curve light function after the image matrix 25 'from FIG. 13, in which it can be seen that this light distribution 21' nevertheless extends to the edge of the image matrix 25 ', even if the light matrix 23' is positioned at the edge of the image matrix 25 ' such as in a cornering light function.
    In Fig. 15 it is shown how the generated light distribution 21 'of the vehicle headlamp can be superimposed on an area of an oncoming vehicle, in which the light distribution 21' is darkened so as not to dazzle the oncoming vehicle. In other words, a light distribution can also be formed from an inverse light model. Furthermore, a plurality of light models for different applications can be superimposed simultaneously, wherein the light models can be "conventional", ie, for example, comprise a low-beam light distribution and "inverse" light models, for example, to hide or "non-illuminating" of certain areas are superimposed The superimposition may be different, for example an addition of the individual values of the light model or a determination of the respective brightest or darkest value of the corresponding light model.
    Fig. 16 shows a possible danger situation for a vehicle by an approaching or the road crossing animal.
    Further, as shown in Fig. 17, it is possible to dynamically project information such as traffic signs, warnings (warning triangles, exclamation marks, danger areas indicated by rectangles, etc.) or hints or marks for navigation onto the road, that is, as moving symbols , such as projected arrows that are rendered as "animation" within the projection, or projected lines whose history, width, or length depend on vehicle parameters such as braking or steering deflection, and respond quickly to changes.This technology is called Advanced Information Beam ™ (AIB ™). Such animations are common in the computer field and can be recorded and stored, for example, with the data format "Graphics Interchange Format" (".gif").
    List of reference numbers: 1.11 Vehicle headlights 2.12 Light source 3.13 Primary optics 4.14 Projection optics 5 Control device 6 Output unit 7, 17 Optoelectronic component 8 Optoelectronic element 9, 19 Actuation unit 20 Light model 21, 21 'Light distribution 22, 22' Illuminated area 23, 23 'Light matrix 24, 24' Position parameter 25.25 'image matrix 26 video signal L, R vertical shift 51 data signal 52 V sync signal TI time window 1 T2 time slot 2 PI, PI' front porch P2 rear signal back porch VI, VI 'video synchronization pulse PIC, PIC' image information X, Y, Z coordinates XA, YA, ZA axes
    权利要求:
    Claims (21)
    [1]
    claims
    1. A vehicle headlight (1,11), comprising at least one light source (2,12), at least one projection optics (4,14), at least one control device (5), at least one output unit (6), and at least one optoelectronic component (7, 17) comprising a controllable arrangement of a plurality of individually adjustable optoelectronic elements (8) in the form of a two-dimensional matrix, an image resolution being defined by the product of the number of rows and columns of the matrix, and the vehicle headlamps (1,11) is configured to emit light from the at least one light source (2, 12) in the direction of the at least one optoelectronic component (7, 17) and to modulate it by means of the at least one optoelectronic component (7, 17) and at least partially in the direction of the at least one Projection optics (4, 14) to illuminate and form a light image in front of the vehicle, wherein the at least one control device (5) with the at least one output unit (6) is connected, the at least one output unit (6) with the at least one optoelectronic component (7,17) for driving the optoelectronic elements (8) is connected, characterized in that on the part of at least one control device (5) at least one light model (20) is stored, and the at least one control device (5) is set up to form a two-dimensional light matrix (23, 23 ') from the light model (20) and the light matrix (23, 23') as a function of a position parameter (20). 24,24 ') at least partially within a two-dimensional image matrix (25, 25') to arrange and by means of the at least one output unit (6) the image matrix (25,25 ') from the at least one control device (5) to the at least one optoelectronic component ( 7,17) are transmitted.
    [2]
    2. Vehicle headlight (1,11) according to claim 1, characterized in that the image matrix (25, 25 ') describes an area which is larger, preferably at least twice as large, particularly preferably at least three times as large as the area, which describes the light matrix (23, 23 ').
    [3]
    3. Vehicle headlight (1,11) according to claim 1, characterized in that the image matrix (25, 25 ') describes an area which is smaller, preferably at most half as large, more preferably at most one third is as large as the area describing the light matrix (23, 23 ').
    [4]
    4. Vehicle headlight (1,11) according to one of claims 1 to 3, characterized in that the at least one light model defines a light distribution for a vehicle headlight, preferably a light distribution of a low beam or a high beam.
    [5]
    5. Vehicle headlight (1,11) according to one of claims 1 to 4, characterized in that the position parameter is changed in dependence on the loading state of the vehicle, wherein the light matrix is preferably displaced vertically within the image matrix.
    [6]
    6. Vehicle headlight (1,11) according to one of claims 1 to 5, characterized in that the position parameter (24,24 ') is changed in dependence on the steering angle of the vehicle, wherein the light matrix (23, 23') within the image matrix (25, 25 ') is preferably displaced horizontally and preferably a cornering light function of a vehicle headlamp can be formed.
    [7]
    7. Vehicle headlight (1,11) according to one of claims 1 to 6, characterized in that the position parameter (24, 24 ') in dependence on the road course, which is preferably determined from navigation data or road maps of the vehicle is changed, the Light matrix (23, 23 ') within the image matrix (25, 25') preferably vertically for a headlamp leveling or preferably horizontally displaced for a cornering light function.
    [8]
    8. Vehicle headlight (1, 11) according to one of claims 1 to 7, characterized in that the position parameter (24, 24 ') is changed as a function of the driving speed of the vehicle, the light matrix (23, 23') within the image matrix (25, 25 ') is preferably moved vertically.
    [9]
    9. Vehicle headlight (1,11) according to one of claims 1 to 8, characterized in that the position parameter (24,24 ') depending on the weather in the vicinity of the road, in particular by the temperature, the humidity or the visibility conditions for the driver, who can be determined by vehicle-mounted sensors, is changed, wherein the light matrix (23, 23 ') within the image matrix (25, 25') is preferably displaced vertically.
    [10]
    10. Vehicle headlight (1,11) according to one of claims 1 to 9, characterized in that the position parameter (24,24 ') in response to traffic messages that can be received by receiving means of the vehicle, is changed, wherein the light matrix (23 , 23 ') is preferably displaced vertically within the image matrix (25, 25').
    [11]
    11. Vehicle headlight (1,11) according to one of claims 1 to 10, characterized in that the at least one light model (20) is defined by a matrix of brightness values of a light distribution, which preferably corresponds to the light matrix (23, 23 ').
    [12]
    12. Vehicle headlight (1,11) according to one of claims 1 to 11, characterized in that the at least one light model is defined by a two-dimensional function, wherein the function values define brightness values of a light distribution.
    [13]
    13. Vehicle headlight (1,11) according to claim 12, characterized in that the two-dimensional function is spanned by interpolation between the support points in the light matrix (23,23 ').
    [14]
    14. Vehicle headlight (1,11) according to one of claims 1 to 13, characterized in that the at least one light source (2) comprises a semiconductor light emitting diode, in particular a high current light emitting diode or a laser diode.
    [15]
    15. A method for generating at least one light distribution with a vehicle headlight (1,11), comprising at least one light source (2,12), at least one projection optics (4,14), at least one control device (5), at least one output unit (6), and at least one optoelectronic component (7, 17) comprising a controllable arrangement of a plurality of individually adjustable optoelectronic elements (8) in the form of a two-dimensional matrix, wherein an image resolution is defined by the product of the number of rows and columns of the matrix, and the vehicle headlight (1, 11) is set up to emit light from the at least one light source (2, 12) in the direction of the at least one optoelectronic component (7, 17) and to modulate it by means of the at least one optoelectronic component (7, 17) and at least partially in the direction of the at least one projection optics (4, 14) to illuminate and in front of the vehicle to form a light image, wherein the at least a control device (5) is connected to the at least one output unit (6), the at least one output unit (6) is connected to the at least one optoelectronic component (7, 17) and drives the optoelectronic elements (8), characterized in that the at least one control device (5) at least one light model (20) is stored, and the at least one control device (5) from the light model (20) forms a two-dimensional light matrix (23, 23 ') and the light matrix (23, 23') in Dependent on a position parameter (24, 24 ') at least partially within a two-dimensional image matrix (25, 25') arranges and by means of the at least one output unit (6) the image matrix (25, 25 ') from the at least one control device (5) to the transmits at least one optoelectronic component (7,17).
    [16]
    16. The method according to claim 15, characterized in that the image matrix (25, 25 ') describes an area which is larger, preferably at least twice as large, particularly preferably at least three times as large as the area which the light matrix (23 , 23 ') describes.
    [17]
    17. The method according to claim 15 or 16, characterized in that the at least one light model defines a light distribution for a vehicle headlight, preferably a light distribution of a low beam or a high beam.
    [18]
    18. The method according to claim 15, characterized in that the position parameter is dependent on at least one of the following variables: the load state of the vehicle or the road course, which can preferably be determined from navigation data of the vehicle, or the travel speed of the vehicle Vehicle, or • the weather in the vicinity of the road, in particular by the temperature, the humidity or the visibility conditions for the driver, which are determinable by sensors on the vehicle side, or • of traffic news that can be received by receiving devices of the vehicle, is changed, wherein the light matrix (23, 23 ') within the image matrix (25, 25') is preferably displaced vertically.
    [19]
    19. The method according to any one of claims 15 to 18, characterized in that the position parameter (24, 24 ') is changed in dependence of the steering angle of the vehicle, wherein the light matrix (23, 23') within the image matrix (25, 25 ') preferably horizontally displaced and preferably a cornering light function of a vehicle headlamp can be formed.
    [20]
    20. The method according to any one of claims 15 to 19, characterized in that at least one light model (20) is defined by a matrix of brightness values of a light distribution, which preferably corresponds to the light matrix (23, 23 ').
    [21]
    21. The method according to any one of claims 15 to 20, characterized in that at least one light model by a two-dimensional function, which is defined by a plurality of nodes, the brightness values of a light distribution, and the two-dimensional function, preferably by interpolation between the support points in the Light matrix (23, 23 ') is formed.
    类似技术:
    公开号 | 公开日 | 专利标题
    AT518724B1|2018-02-15|Vehicle headlight and method for generating a light distribution
    AT519462B1|2018-07-15|vehicle headlights
    DE102014214522A1|2016-01-28|Method and device for projecting light symbols on a roadway
    WO2017143371A1|2017-08-31|Headlight for vehicles
    AT519864B1|2018-11-15|Vehicle headlight and vehicle control
    EP2128589A1|2009-12-02|Method and device for calibrating a vertical bright-dark border created by a headlamp of a vehicle
    DE102016001915A1|2017-08-24|Lighting device for a vehicle, system with the lighting device and method for operating a lighting device
    WO2017102366A1|2017-06-22|System and method for object-based control of a high-resolution headlight for a motor vehicle
    EP3468839B1|2021-11-03|Vehicle headlight
    DE102009020910A1|2010-11-18|Headlight system for use in driver assistance system of vehicle, has light source whose light is radiated through image generator, where transmission rate of generator is changeable depending on objects in surrounding field of vehicle
    DE102016115307A1|2017-02-23|VEHICLE DRIVING LIGHT DEVICE
    EP2700536A2|2014-02-26|Method for operating a headlamp system and headlamp system for a vehicle
    DE102016003296A1|2017-09-21|Motor vehicle with at least one headlight
    EP3649013A1|2020-05-13|Method for generating a variable high beam light distribution and device
    EP3781439A1|2021-02-24|Method for the communication of a motor vehicle with a road user, and motor vehicle for carrying out the method
    DE102018105563A1|2018-09-20|Lighting device, moving body and control program and data carrier
    DE102016003814A1|2017-09-28|Motor vehicle with at least one headlamp and a device for determining the location of the motor vehicle and method for operating at least one headlight of a motor vehicle
    AT517811B1|2017-11-15|Method for controlling an adaptive light function and motor vehicle headlights
    AT519595B1|2018-11-15|Method and device for generating a light distribution in front of a vehicle
    DE102016119567A1|2017-04-20|Headlamp system with projection device
    EP3313694A1|2018-05-02|Control device for a lighting unit in a motor vehicle, and method for controlling a lighting unit of said type
    EP3543593A1|2019-09-25|Lighting device for a motor vehicle headlight
    KR20190027169A|2019-03-14|Apparatus for Identifying Vehicle on Road
    EP3159214B1|2021-05-26|Method for operating a headlight on a motor vehicle
    DE102017203891A1|2018-09-13|Lighting device for a motor vehicle
    同族专利:
    公开号 | 公开日
    WO2017214648A1|2017-12-21|
    AT518724B1|2018-02-15|
    EP3468838A1|2019-04-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO1999011968A1|1997-08-29|1999-03-11|Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH|Lighting system for vehicles and method for operating a lighting system of this type|
    EP1433654A2|2002-12-27|2004-06-30|Ichikoh Industries, Ltd.|Digital display apparatus for vehicle and method of displaying information|
    WO2013117923A1|2012-02-07|2013-08-15|Two Trees Photonics Limited|Lighting device for headlights with a phase modulator|
    DE10134594A1|2001-07-17|2003-01-30|Bayerische Motoren Werke Ag|Lighting system for assisting a vehicle driver has a lighting unit, a unit to modulate lighting, sensors to detect a driving situation and a control unit to control lighting modulation through a detected driving situation.|
    US7156542B2|2002-12-13|2007-01-02|Ford Global Technologies, Llc|Vehicle headlight system having digital beam-forming optics|
    DE102007012834B4|2007-03-17|2017-08-03|Automotive Lighting Reutlingen Gmbh|Method for a headlight with dynamic cornering light and adaptive behavior|
    JP6174337B2|2013-02-27|2017-08-02|株式会社小糸製作所|Vehicle lighting|
    WO2015032795A2|2013-09-03|2015-03-12|Jaguar Land Rover Limited|System for imaging|
    DE102014008743A1|2014-06-12|2015-12-17|Audi Ag|Headlamp leveling for a motor vehicle headlamp|JP2019204709A|2018-05-24|2019-11-28|スタンレー電気株式会社|Luminaire and light projection system|
    JP2020055516A|2018-09-28|2020-04-09|株式会社小糸製作所|Head lamp for vehicle|
    FR3102536A1|2019-10-25|2021-04-30|Valeo Vision|Image data management method and automotive lighting device|
    FR3107751B1|2020-02-28|2022-02-18|Valeo Vision|Method for controlling a light pattern and automotive lighting device|
    FR3107943A1|2020-03-09|2021-09-10|Valeo Vision|Method of controlling a light pattern and automotive lighting device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50533/2016A|AT518724B1|2016-06-13|2016-06-13|Vehicle headlight and method for generating a light distribution|ATA50533/2016A| AT518724B1|2016-06-13|2016-06-13|Vehicle headlight and method for generating a light distribution|
    PCT/AT2017/060134| WO2017214648A1|2016-06-13|2017-05-22|Vehicle headlight|
    EP17730034.0A| EP3468838A1|2016-06-13|2017-05-22|Vehicle headlight|
    [返回顶部]