Motor vehicle with one or more headlights

Abstract

Motor vehicle with one or more headlights, wherein a multi-aperture projection display (10) is provided in a given headlight (12), which includes a light source (1) for illuminating a plurality of object structures (3) and an array of projection lenses (4), wherein each projection lens (4) is assigned to an object structure (3), which is projected by the respective projection lens (4) into a projection plane (5) in the vicinity of the motor vehicle (11), wherein the multi-aperture projection display (10) is configured such that an overall image with a symbol set (SY) is generated by the projected object structures (3) when a projection surface (17) is arranged in the area of ​​the projection plane (5), characterized in that the motor vehicle (11) is equipped to carry out a calibration of the given headlight (12).in which, in the case of the arrangement of the projection surface (17) in the area of ​​the projection plane (5), an image (LB) of the symbol (SY) is captured by means of a camera (13) of the motor vehicle (11) and the actual position (IP) of the symbol (SY) in the captured image (LB) is determined, wherein the actual position (IP) is compared with a target position (SP) of the symbol (SY) and, if a deviation of the actual position (IP) from the target position (SP) of the symbol (SY) is detected, the position of the specified headlight (12) is adjusted depending on this deviation by means of an actuator (15) of the motor vehicle (11) such that in the adjusted position of the specified headlight (12) the actual position (IP) of the symbol (SY) corresponds to the target position (SP).

Description

[0001] The invention relates to a motor vehicle with one or more headlights and a method for calibrating a given headlight in such a motor vehicle.

[0002] The use of so-called multi-aperture projection displays in motor vehicles is known from the prior art. Multi-aperture projection displays enable the generation of an overall image by projecting the object structures onto a predefined projection plane using an array of projection lenses, each of which is assigned an object structure. Such multi-aperture projection displays are shown in the documents DE 10 2009 024 894 A1 and DE 10 2011 076 083 A1.

[0003] Document DE 10 2014 219 371 A1 describes a motor vehicle with a multi-aperture projection display that generates driver-perceivable symbols in one and, if necessary, several predefined projection planes. The symbols serve as an aid for the driver.

[0004] The publication DE 10 2013 211 876 A1 describes a method for checking the adjustment of a headlight in a motor vehicle. In the method, a light distribution generated by the headlight is captured on a projection surface using a 3D camera. From the image data from the 3D camera, an actual position of a light area within the light distribution of the headlight and a target position of the light area are determined. If there is a deviation between the actual position and the target position, the headlight is adjusted.

[0005] The publication DE 10 2009 047 932 A1 discloses a headlight for a motor vehicle with a light module that emits light along a predetermined light axis. A device for basic adjustment of the light module is provided for a basic headlight setting. The device for basic adjustment of the light module is designed as an electromotive device.

[0006] The document DE 10 2012 102 446 A1 discloses a method for adjusting a headlight in a motor vehicle, wherein at least one feature of a cut-off point of the light distribution of the headlight is detected on a measuring wall using a camera and the headlight is adjusted depending on the detected feature.

[0007] Document DE 10 2014 015 796 A1 discloses a method for testing the functionality of a motor vehicle with a headlight comprising a laser for generating light, by means of which a converter is excited to emit converted light, which is emitted by the headlight as a light distribution on a surface in an area surrounding the motor vehicle. A control device of the headlight generates a test pattern on the surface, which is detected by an optical detection device of the motor vehicle. An evaluation device of the motor vehicle compares the detected test pattern with a predetermined reference pattern. Based on this comparison, a calibration of the headlight can be performed.

[0008] The object of the invention is to provide a motor vehicle with one or more headlights, wherein at least one headlight can be calibrated easily and efficiently.

[0009] This object is achieved by the motor vehicle according to patent claim 1 and the calibration method according to patent claim 14. Further developments of the invention are defined in the dependent claims.

[0010] The motor vehicle according to the invention comprises one or more headlights. A multi-aperture projection display is provided in a given headlight from the headlight(s). The multi-aperture projection display comprises a light source for illuminating a plurality of object structures and an array of projection lenses, each projection lens being assigned to an object structure, whereby the respective projection lens is projected into a projection plane in the surroundings of the motor vehicle. The multi-aperture projection display is designed such that the projected object structures generate an overall image with symbolism when a projection surface is arranged in the region of the projection plane. The multi-aperture projection display is known per se from the prior art and is described, for example, in the documents cited above.The term “arrangement of a projection surface in the area of ​​the projection plane” is to be understood in such a way that the projection surface is arranged in the projection plane or in the vicinity of the projection plane, so that the symbolism is visible sharply or, if necessary, distorted.

[0011] The motor vehicle according to the invention is configured to calibrate the predetermined headlight (i.e., calibrate the position setting of the predetermined headlight). During this calibration, if the projection surface is arranged in the region of the projection plane, an image of the symbol is captured by a camera installed in the motor vehicle, and the actual position of the symbol is determined in the captured image. The actual position is then compared with a target position of the symbol, and if a deviation between the actual position and the target position of the symbol is determined, the position of the predetermined headlight is adjusted as a function of this deviation via a vehicle-side actuator such that, in the adjusted position of the predetermined headlight, the actual position of the symbol corresponds to the target position.

[0012] The motor vehicle according to the invention thus includes a calibration module that evaluates the images from a camera and influences a headlight actuator. The calibration module comprises a computer means for performing the above comparison of the desired position with the actual position and outputting corresponding commands for adjusting the position to the actuator. The invention has been described with reference to a given headlight in the motor vehicle, but can also be implemented for multiple given headlights in order to suitably calibrate multiple headlights in the motor vehicle.

[0013] The terms "actual position" and "target position" are to be understood broadly. In addition to the position of a reference point of the symbol (e.g., its center of gravity) in the image or on the projection surface, in certain variants of the invention the position of the symbol can also depend on the geometry of the symbol. For example, the symbol in the actual position can be tilted relative to the target position and thus distorted, or have a different size than the target position. Accordingly, the terms "actual and target position" of the symbol include the position of a reference point of the symbol in the image, and optionally the geometry of the symbol is also taken into account when determining the actual and target positions.

[0014] The invention enables, for the first time, the calibration of a motor vehicle headlight using a multi-aperture projection display. This utilizes the discovery that such a multi-aperture projection display can generate a predetermined symbol in a defined projection plane, the position of which can be used to calibrate the headlight.

[0015] In a particularly preferred embodiment, the motor vehicle according to the invention is configured such that a headlight range adjustment is carried out for the specified headlight, by which the position of the specified headlight is changed depending on the inclination of the longitudinal axis of the motor vehicle (i.e., depending on the so-called pitch angle). This headlight range adjustment compensates for pitching movements of the motor vehicle or a change in the inclination of the longitudinal axis of the motor vehicle, e.g., when heavily loaded, so that the headlight always generates a light distribution with the same range.In the embodiment described here, the change in the position of the specified headlight caused by the headlight range adjustment is adapted depending on the deviation between the actual position and the target position of the symbol determined by calibration, in order to compensate for any deviation between the actual position and the target position of the symbol for any inclination of the vehicle's longitudinal axis. Accordingly, the deviation between the actual and target positions determined during the calibration process is also used to adapt a headlight range adjustment.

[0016] The projection plane defined by the multi-aperture projection display, into which the corresponding symbols are projected, can be arranged arbitrarily. In a preferred variant, the projection plane runs perpendicular to the longitudinal axis of the vehicle. Nevertheless, the projection plane can also run diagonally to this longitudinal axis or horizontally, e.g., along the floor.

[0017] In a further variant of the motor vehicle according to the invention, the camera that captures the symbolism or a separate distance measuring device (e.g. using ultrasonic sensors) is used to detect when the projection surface is arranged in the region of the projection plane. In the case of a distance measuring device, in particular the distance of the projection plane from the specified headlight is known. If the projection surface is at this distance from the headlight, it is determined that the projection surface is in the region of the projection plane. In the case of a camera, it can be detected whether the corresponding symbolism appears in the camera image. If this is the case, it is again determined that the projection surface is arranged in the region of the projection plane. After this determination, the calibration according to the invention can then be carried out.

[0018] In a further, particularly preferred embodiment, the target position of the symbol is determined from the current position setting of the specified headlight and / or from a detected relative position of the motor vehicle to the projection surface. In a preferred variant, the current position setting of the headlight is a headlight setting which results from a headlight range adjustment of the headlight. As mentioned above, the headlight range adjustment ensures that, regardless of the inclination of the longitudinal axis of the motor vehicle, a light distribution with the same range is always generated by the headlight. The detected relative position of the motor vehicle to the projection surface takes into account that the projection surface and the motor vehicle may be at an angle to one another, e.g. if the road is inclined.

[0019] The relative position of the motor vehicle to the projection plane is preferably detected by recording the inclination of the motor vehicle relative to the horizontal (i.e. the direction perpendicular to gravity) and / or by evaluating a stereo image generated by the motor vehicle. The inclination of the motor vehicle can be determined using known sensors, such as a gravity-sensitive acceleration sensor. It is assumed that the projection surface is at a known angle (in particular perpendicular) to the horizontal, so that the relative position of the motor vehicle to the projection surface can be deduced from the inclination of the motor vehicle. In contrast, the three-dimensional position of the projection surface and thus its relative position to the motor vehicle can be determined directly by evaluating a stereo image from the camera.

[0020] In a further preferred embodiment, a target reference position of the symbol is stored in the motor vehicle for a predetermined position setting of the specified headlight and / or for a predetermined relative position of the motor vehicle to the projection surface. The target position of the symbol is determined from the deviation of the current position setting from the predetermined position setting of the headlight and / or from the deviation of the detected relative position from the predetermined relative position of the motor vehicle to the position surface. This determination can be made using a known Euclidean transformation (rotation, projective transformations).

[0021] In a particularly preferred embodiment, the above predetermined relative position of the motor vehicle to the projection surface corresponds to the arrangement of the projection surface in the projection plane of the multi-aperture projection display. In a preferred variant, the above predetermined position setting of the specified headlight is a position setting resulting from a headlight range adjustment. This position setting can, for example, be the setting of the headlight when its longitudinal axis runs in a horizontal direction.

[0022] Depending on the design of the motor vehicle according to the invention, calibration can be performed depending on different conditions. In one variant, calibration is performed automatically by the motor vehicle when the projection surface is located in the area of ​​the projection plane, which can be suitably detected as described above. Alternatively or additionally, it is also possible for the driver of the motor vehicle to initiate calibration manually via a user interface in the motor vehicle.

[0023] In a further variant, the motor vehicle according to the invention is designed such that the driver of the motor vehicle is given instructions via a user interface regarding the positioning of the motor vehicle prior to calibration in order to arrange the projection surface in the region of the projection plane. Alternatively or additionally, it is also possible for the motor vehicle to automatically move prior to calibration to a position in which the projection surface is arranged in the region of the projection plane.

[0024] In a further variant, the motor vehicle according to the invention is configured such that a warning message is output via a user interface in the motor vehicle if the deviation between the actual position and the target position of the symbol exceeds a predetermined threshold and / or calibration cannot be performed, e.g., if adjustment of the headlight via the actuators is no longer possible such that the actual position of the symbol corresponds to the target position. This variant of the invention alerts the driver of the motor vehicle to any defects in the headlight.

[0025] In addition to the motor vehicle described above, the invention relates to a method for calibrating a given headlight in such a motor vehicle. A multi-aperture projection display is provided in the given headlight, which contains a light source for illuminating a plurality of object structures and an array of projection lenses, wherein each projection lens is assigned to an object structure that is projected by the respective projection lens into a projection plane in the surroundings of the motor vehicle. The multi-aperture projection display is designed such that the projected object structures generate an overall image with symbolism when a projection surface is arranged in the region of the projection plane.

[0026] The method according to the invention is characterized in that, during calibration, if the projection surface is arranged in the region of the projection plane, an image of the symbol is captured by a camera, and the actual position of the symbol is determined in the captured image. The actual position is compared with a target position of the symbol, and if a deviation of the actual position from the target position of the symbol is determined, the position of the specified headlight is adjusted via an actuator of the motor vehicle depending on this deviation such that, in the adjusted position of the specified headlight, the actual position of the symbol corresponds to the target position.

[0027] The method according to the invention can be carried out with one or more preferred variants of the motor vehicle according to the invention. If the method is carried out with such preferred variants, the features of the preferred variants are implemented in the form of corresponding method features in the calibration method.

[0028] Embodiments of the invention are described in detail below with reference to the attached figures.

[0029] They show: Fig. 1 is a sectional view of a multi-aperture projection display used in an embodiment of the motor vehicle according to the invention; Fig. 2 a perspective view to illustrate the projection of the multi-aperture projection display from Fig. 1; Fig. 3 a schematic representation of an embodiment of a motor vehicle according to the invention when carrying out a headlight calibration; Fig. 4 a top view of the symbolism used in the scenario of Fig. 3 is projected onto a projection screen; and Fig. 5 a diagram showing the implementation of a variant of the calibration process according to the invention.

[0030] Fig. 1 shows a multi-aperture projection display known per se, which is known from the document DE 10 2009 024 894 A1. This projection display is used in the embodiment of the motor vehicle according to the invention described here. It is a component of the headlight 12 described further below and serves to generate part of the light distribution by this headlight, which additionally comprises other lighting modules (e.g., LED lighting modules). In particular, the multi-aperture projection display can be used to generate a dynamic component of the light distribution generated by the headlight, e.g., the low beam and / or the high beam.

[0031] The projection display 10 comprises a light source 1, which can be designed, for example, as a laser diode, LED, or OLED. The light from the light source falls on a field lens array in the form of a plurality of condenser lenses 2 applied to a substrate 6 (e.g., a glass substrate), with an object structure 3 consisting of transmissive and opaque regions located adjacent to each condenser lens 2. On the side of the glass substrate opposite the side with the object structures, there is an array of projection lenses 4, with the distance between the projection lenses and the object structures 3 essentially corresponding to the focal length f of the individual projection lenses. Each projection lens is assigned to an object structure, which is imaged via the corresponding projection lens into the projection plane 5 at a distance D from the array of projection lenses. This is illustrated by the beam paths shown.It can be seen that the pitch distance p_Dia between adjacent object structures 3 is greater than the pitch distance p_PL between adjacent projection lenses 4. This causes a tilting of the optical axes of the corresponding pairs of object structure and projection lens and thus a superposition of all projected images of the object structures 3 to form an overall image in the projection plane 5.

[0032] The magnification M of the overall image in the projection plane 5 results from the ratio of the projection distance D to the focal length f of the projection lenses 4 and is as follows: M=Df=p_PLp_Dia−p_PL

[0033] The magnification thus depends on the difference in pitch between the object structures and the projection lenses. The smaller this difference, the greater the magnification and the further the projection plane is from the projection display.

[0034] Fig. 2 illustrates again the image projection of the arrangement of the Fig. 1. Exemplary object structures are shown in the form of the transmissive letter “F”. Fig. 2, each individual letter is imaged via a corresponding projection lens 4 into the same enlarged letter in the projection plane 5. The letter in the projection plane 5 is thus an overlay of the image of all object structures.

[0035] With the multi-aperture projection display of the Fig. 1 creates a bright and very compact projection module with dimensions in the range of a few centimeters. This allows for easy projection onto inclined projection surfaces or freeform surfaces. A corresponding projection display with freeform projection surfaces or tilted projection surfaces is known from document DE 10 2011 076 083 A1.

[0036] The Fig. 1 and Fig. The projection display shown in Figure 2, which is integrated into a motor vehicle headlight, is used according to the invention to calibrate the headlight or its headlight range control. This takes advantage of the fact that a defined symbol becomes visible in the projection plane 5 when a corresponding projection surface is located in this projection plane. The corresponding calibration is then performed by offsetting the actual position of this symbol from a predetermined target position, as explained in more detail below.

[0037] Instead of the Fig. 1 and Fig. In addition to the projection display shown in Figure 2, modifications of this projection display can also be used within the scope of the calibration according to the invention. In particular, the projection display described in the document DE 10 2014 219 371 A1 can also be used, in which several different symbols can be displayed in different projection planes. In this case, the calibration is performed for one of these projection planes. The entire disclosure content of the document just mentioned is incorporated by reference into the content of the present application.

[0038] Fig. Figure 3 shows a side view of an embodiment of the motor vehicle according to the invention, which is designated by reference numeral 11. This motor vehicle comprises two headlights 12, whereby the calibration process is explained below using the right headlight. The same calibration process is carried out analogously for the left headlight. The headlight 12 contains the Fig. 1. Furthermore, a camera 13 is installed in the motor vehicle 11, which is located in the upper area of ​​the windshield of the motor vehicle, but can also be installed in a different position. Furthermore, a control unit 14 is shown schematically, which carries out the calculations as part of the calibration process. In addition, an actuator system 15 is shown schematically, which can change the position of the headlight 12 and in particular its inclination relative to the longitudinal axis of the motor vehicle. In the control unit 14 or, if appropriate, in another control unit, a headlight range adjustment is implemented, with which the position of the headlight 12 is adjusted by means of the actuator system 15 based on the pitch angle of the motor vehicle (i.e. the inclination of its longitudinal axis relative to the horizontal), so that the same position orRange of the light distribution generated by the headlight on the road is maintained.

[0039] In the scenario of Fig. 3, the motor vehicle 11 was positioned by the driver in a position at a distance D in front of a projection surface 17. The projection surface 17 represents the surface of a wall 16. In the position of the motor vehicle shown, the Fig. 1, the projection plane 5 with the symbols contained therein is sharply projected onto the projection surface 17. The symbols can be designed in different ways and can include, for example, one or more characters or pictograms or numbers or other symbols. Fig. 4 shows a top view of the projection surface 17 with the symbol SY projected there. In the example of Fig. 4, the symbol comprises two circles with corresponding letters "A" and "OK." Another type of symbol can also be generated in the projection surface. The only important thing is that the symbol allows its position on the projection surface 17 to be determined.

[0040] During calibration, the image of the symbol SY is captured using camera 13. A suitable evaluation algorithm in the control unit 14 then determines whether there is a deviation between the actual position of the symbol and a corresponding target position of the symbol. The target position indicates where the symbol should be if the headlight range adjustment is functioning correctly. If a deviation occurs between the actual and target positions of the symbol, the headlight actuator 15 calibrates the headlight accordingly so that the actual and target positions match again. The information about the deviation between the actual and target positions is also used during further operation of the motor vehicle for headlight range adjustment to ensure that the headlight continues to illuminate the road with a constant beam range.

[0041] Fig. 5 shows a schematic representation of a concrete embodiment of the Fig. 4 explained calibration procedure. According to Fig. 5, the spotlight produces a luminous flux LS, which generates the representation of the symbol SY on the projection surface 17, which is determined by the block DA in Fig. 5. The representation of the symbols represents the controlled system of the control system explained below. The generated light image LB is captured as a digital image by camera 13 according to block BE. As already explained, the actual position IP of the symbols in the image is then determined, i.e. the height position of the symbols in relation to the ground and, if applicable, the position of the symbols in the horizontal direction. This actual position IP is processed as part of a control system using controller RE, with the reference variable of this control system being the corresponding target position SP of the symbols. This target position is determined appropriately, which is indicated by block BS.

[0042] When determining the target position SP, a target reference position SR is used, which specifies the target position of the symbol for a predetermined relative position of the motor vehicle with respect to the projection surface 17. In particular, the target reference position applies to a position of the motor vehicle at which its longitudinal axis is perpendicular to the projection surface 17. Using corresponding parameters PA of the motor vehicle, it is then determined to what extent the road inclination relative to the projection surface deviates from the inclination valid for the target reference position. If such a deviation occurs, known projection algorithms can be used to determine how the target reference position changes due to this deviation. The parameters PA can be determined, for example, using a gravity-dependent acceleration sensor of the motor vehicle.Furthermore, a change in the target reference position SR can result from the current setting of the headlight range control (LWR). The current setting of the headlight range control is taken into account by the target pitch angle SN'. According to block BS, the expected target position SP is determined from the target reference position SR, taking into account the target pitch angle SN' and the vehicle parameters PA.

[0043] The target pitch angle SN' is derived from the vehicle's 11 parameters PA', which are relevant for headlight range adjustment. The PA' parameters relate to the vehicle's inclination. This value can be determined, for example, from the difference in ride height between the front and rear axles. The ride heights can be detected using suitable sensors. Headlight range adjustment (LWR) can also take into account light distribution offsets in the case of adaptive headlight distributions, such as country road, city, and motorway lighting.

[0044] By the RE controller of the Fig. 5, the difference between the target position SP and the actual position IP of the symbol SY is finally determined. Based on this difference, a corresponding target pitch angle SN is then determined for the headlight to ensure that the target position and actual position of the symbol match. If the RE controller cannot detect any deviation between the target position SP and the actual position IP, the control is terminated.

[0045] The target pitch angle SN is used to adjust the headlight accordingly based on this angle, which is indicated by the block SE. With the resulting change in the symbol representation on the wall, the control process just described continues until the actual position IP corresponds to the corresponding target position SP.

[0046] The Fig. The headlight adjustment SE indicated in Figure 5 can optionally be carried out with the involvement of the driver via a user interface. In particular, the driver can be prompted to perform certain driving maneuvers in order to achieve a position of the vehicle suitable for calibration in accordance with the Fig. 3. Likewise, if there are large deviations between the actual position and the target position, or if calibration is unsuccessful, an error message may be displayed via the user interface.

[0047] The embodiments of the invention described above offer a number of advantages. In particular, the symbology generated with a multi-aperture projection display is used for the first time to calibrate the headlight adjustment of a motor vehicle. In this way, adjustments or incorrect adjustments of the headlight can be corrected easily and efficiently. The calibration according to the invention is preferably used in a motor vehicle that has a headlight range adjustment system. List of reference symbols 1 light bulb 2 condenser lenses 3 Object structures 4 projection lenses 5 Projection plane 6 Glass substrate 10 multi-aperture projection display p_Dia, p_PL pitch distances D Distance f focal length 11 Motor vehicle 12 headlights 13 Camera 14 Control unit 15 Actuators 16 Wall 17 Projection screen SY Symbolism BE image acquisition BS Determination of the target position DA representation of the symbolism in the projection surface IP actual position of the symbol SP Target position of the symbolism SR target reference position LB photograph LS luminous flux LWR headlight range adjustment PA, PA' vehicle parameters RE controller SE Headlight adjustment SN, SN' Target pitch angle

Claims

[1] Motor vehicle with one or more headlights, wherein a multi-aperture projection display (10) is provided in a given headlight (12) from the headlight(s), which multi-aperture projection display contains a light source (1) for illuminating a plurality of object structures (3) and an array of projection lenses (4), wherein each projection lens (4) is assigned to an object structure (3) which is projected by the respective projection lens (4) into a projection plane (5) in the surroundings of the motor vehicle (11), wherein the multi-aperture projection display (10) is designed such that an overall image with a symbolism (SY) is generated by the projected object structures (3) when a projection surface (17) is arranged in the region of the projection plane (5), characterized byin that the motor vehicle (11) is set up to carry out a calibration of the predetermined headlight (12), in which, if the projection surface (17) is arranged in the region of the projection plane (5), an image (LB) of the symbol (SY) is captured by means of a camera (13) of the motor vehicle (11) and the actual position (IP) of the symbol (SY) is determined in the captured image (LB), wherein the actual position (IP) is compared with a target position (SP) of the symbol (SY) and, upon determination of a deviation of the actual position (IP) from the target position (SP) of the symbol (SY), an adjustment of the position of the predetermined headlight (12) is effected as a function of this deviation via an actuator (15) of the motor vehicle (11) in such a way that, in the adjusted position of the predetermined headlight (12), the actual position (IP) of the symbol (SY) corresponds to the target position (SP). [2] Motor vehicle according to claim 1, characterized bythat the motor vehicle (11) is designed in such a way that a headlight range adjustment (LWR) is carried out for the predetermined headlight (12), by means of which the position of the predetermined headlight (12) is changed as a function of an inclination of the longitudinal axis of the motor vehicle (11), this change being adapted as a function of the deviation between the actual position (IP) and the desired position (SP) of the symbol (SY) determined by the calibration in order to compensate for a deviation between the actual position (IP) and the desired position (SP) of the symbol (SY) for any inclinations of the longitudinal axis of the motor vehicle (11). [3] Motor vehicle according to claim 1 or 2, characterized by that the projection plane (5) runs perpendicular to the longitudinal axis of the motor vehicle (11). [4] Motor vehicle according to one of the preceding claims, characterized bythat the motor vehicle (11) is designed in such a way that it is detected by means of the camera (13) or a distance measuring device when the projection surface (17) is arranged in the region of the projection plane (5). [5] Motor vehicle according to one of the preceding claims, characterized by that the motor vehicle (11) is designed such that the target position (SP) of the symbol (SY) is determined from the current position setting of the predetermined headlight (12) and / or from a detected relative position of the motor vehicle (11) to the projection surface (17). [6] Motor vehicle according to claim 5, characterized by that the motor vehicle (11) is designed such that the relative position of the motor vehicle (11) to the projection surface (17) is detected by detecting the inclination of the motor vehicle (11) relative to the horizontal and / or by evaluating a stereo image captured by the camera (13). [7] Motor vehicle according to claim 5 or 6, characterized by in that a target reference position (SR) of the symbolism (SY) for a predetermined position setting of the specified headlight (12) and / or for a predetermined relative position of the motor vehicle (11) to the projection surface (17) is stored in the motor vehicle (11), wherein the motor vehicle (11) is designed in such a way that the target position (SP) of the symbolism (SY) is determined from the deviation of the current position setting compared to the predetermined position setting of the headlight (12) and / or from the deviation of the detected relative position compared to the predetermined relative position of the motor vehicle (11) to the projection surface (17). [8] Motor vehicle according to claim 7, characterized by that the predetermined relative position of the motor vehicle (11) to the projection surface (17) corresponds to the arrangement of the projection surface (17) in the projection plane (5). [9] Motor vehicle according to one of the preceding claims, characterized by that the motor vehicle (11) is designed such that the calibration is carried out automatically by the motor vehicle (11) when the projection surface (17) is arranged in the region of the projection plane (5). [10] Motor vehicle according to one of the preceding claims, characterized by that the motor vehicle (11) is designed such that the calibration can be triggered manually by the driver of the motor vehicle (11) via a user interface in the motor vehicle (11). [11] Motor vehicle according to one of the preceding claims, characterized by that the motor vehicle (11) is designed in such a way that the driver of the motor vehicle (11) is given instructions via a user interface for positioning the motor vehicle (11) in advance of the calibration in order to arrange the projection surface (17) in the region of the projection plane (5). [12] Motor vehicle according to one of claims 1 to 10, characterized by that the motor vehicle (11) is designed in such a way that it automatically moves in advance for calibration into a position in which the projection surface (17) is arranged in the region of the projection plane (5). [13] Motor vehicle according to one of the preceding claims, characterized by that the motor vehicle is designed in such a way that a warning message is issued via a user interface in the motor vehicle (11) if the deviation between the actual position (IP) and the target position (SP) of the symbol (SY) exceeds a predetermined threshold value and / or the calibration cannot be carried out. [14] Method for calibrating a given headlight (12) in a motor vehicle (11) according to one of the preceding claims, wherein a multi-aperture projection display (10) is provided in the given headlight (12), which contains a lighting means (1) for illuminating a plurality of object structures (3) and an array of projection lenses (4), wherein each projection lens (4) is assigned to an object structure (3) which is projected by the respective projection lens (4) into a projection plane (5) in the surroundings of the motor vehicle (11), wherein the multi-aperture projection display (10) is designed such that an overall image with a symbolism (SY) is generated by the projected object structures (3) when a projection surface (17) is arranged in the region of the projection plane (5), characterized bythat, within the scope of the calibration, in the case of the arrangement of the projection surface (17) in the area of ​​the projection plane (5), an image (LB) of the symbol (SY) is captured by means of a camera (13) of the motor vehicle (11) and the actual position (IP) of the symbol (SY) in the captured image (LB) is determined, wherein the actual position (IP) is compared with a target position (SP) of the symbol (SY) and, upon determination of a deviation of the actual position (IP) from the target position (SP) of the symbol (SY), an adjustment of the position of the predetermined headlight (12) is effected as a function of this deviation via an actuator (15) of the motor vehicle (11) in such a way that, in the adjusted position of the predetermined headlight (12), the actual position (IP) of the symbol (SY) corresponds to the target position (SP).

Images