Division of the overall light distribution into individual headlight modules, taking into account specific photometric properties and malfunctions.

Abstract

Method for adjusting a headlight module (12) with at least one first pixel (15b) which emits a first light beam with an adjustable luminous intensity, while a second pixel (15a) emits a second light beam, wherein an overlap point (17) at the intersection of the first and second light beams is illuminated, wherein the luminance of the first pixel (15b) is adjusted such that a predetermined illuminance is achieved at the overlap point (17), characterized in that The first or second pixel takes over the light output of the other pixel if the latter fails.

Description

[0001] The invention relates to a headlight module, a method and a computer program product for adjusting a headlight module in which the luminous intensity of a pixel is adjusted so that a predetermined illuminance is achieved at the point of overlap with a second pixel.

[0002] The photometric properties of currently available lighting systems are primarily determined by optical elements such as lenses, reflectors, and the light source itself. Adjusting the light distribution (low beam, high beam) while driving is not always possible. The current trend in headlight technology is increasingly moving towards high-resolution headlights, which theoretically allow for the generation of any desired light distribution. The advantage of such systems lies in the high flexibility of light generation, achieved through a relatively high horizontal and vertical resolution of individually controllable pixels. This high spatial resolution allows for the further optimization of existing lighting functions, such as glare-free high beam, or enables the development of entirely new lighting functions.

[0003] As before, the illumination areas of two headlights overlap in a typical vehicle arrangement, even in modern headlights. While statically optimized light distributions were previously possible, the new pixel-based headlight technology offers the possibility of adaptive settings pixel by pixel, opening up new possibilities.

[0004] DE 10 2013 114 264 A1 discloses a method for adjusting a headlight module that has the features of the preamble of claim 1. DE 10 2013 114 264 A1 further discloses a headlight module that has the features of the preamble of claim 10. DE 10 2015 203 889 A1, DE 10 2014 214 552 A1 and DE 10 2007 040 042 A1 disclose further prior art.

[0005] The invention was based on the objective of making the illumination more pleasant and safer for the viewer by illuminating as many areas as possible with the desired brightness. The photometric properties and potential defects of the headlight modules used are also taken into account.

[0006] The term solid angle describes a portion of total space, extending outwards from a point of origin in an angled, fanning-out manner. The sides of a 2D angle are surfaces that typically describe the lateral surface of a cone or pyramid. Conventional light emitted in a specific direction usually fills a solid angle, not a line, because conventional light from a point light source, even with an aperture, would never be precisely directed, as is the case with laser light, for example. To emphasize the spatial aspect, it can also be referred to as a 3D solid angle.

[0007] Luminous flux (in lumens) refers to the power of visible light emitted per second.

[0008] Luminous intensity (in candela) refers to the luminous flux that falls within a specific solid angle.

[0009] Illuminance (in lux) refers to the luminous flux falling on a specific surface. In other words, the illuminance on an illuminated surface indicates the luminous flux (measured in lumens, lm) falling on a unit area (measured in square meters, m²). 2 ) falls. In this context, this also refers to the target light value, which indicates how much light should reach the specific surface.

[0010] The luminance (in cd / m²) 2 Luminous flux refers to the luminous flux emitted or reflected from a surface. In this context, it also refers to the actual light level visible from the vehicle, i.e., the brightness or intensity with which the reflected light is perceived by the driver or a sensor in the vehicle.

[0011] In this context, a surface refers to the projection surface, i.e., the portion of a surface onto which the luminous flux strikes and is reflected or absorbed. This surface is illuminated by the light; that is, it is on this surface that the light exerts its illuminating effect through reflection. The reflected light is at least partially returned to a potential observer. The proportion of reflected light is described by the degree of reflection or absorption.

[0012] Light distribution refers to the spatial distribution of light or luminous intensity. Overall light distribution refers to the spatial distribution of the entire lighting system, while light distribution can refer to specific areas or individual lighting elements.

[0013] The surroundings refer to the area ahead that can potentially be illuminated by the lighting device, also called the scene or scenery. This is the direction in which a vehicle typically travels.

[0014] A lighting device has the ability to illuminate an area of ​​the surroundings or to emit one or more luminous streams in the direction of the surroundings. This can classically comprise one or more headlights, in the case of a vehicle, in particular the front headlights, which serve to illuminate the surroundings. The purpose of the lighting is usually to allow the driver or a camera to obtain a usable optical image or impression of the surroundings. In this context, a lighting device can also comprise only a part of a lighting system, such as a single headlight module, or even just a group / array / segment of lighting elements within a headlight or headlight module. A headlight module is usually a structural unit and comprises at least one lighting element.

[0015] A lighting element is a device that emits light in a luminous flux and forms a so-called pixel. Different lighting elements, or arrays / modules / segments of lighting elements, can essentially be controlled independently in terms of their light intensity. This controllability can range from simple on / off switching to more complex versions, allowing for adjustment of the brightness or luminous flux in steps or continuously (dimming).

[0016] The effective area of ​​the lighting device is divided into many small areas (pixels) by the lighting elements. Within the effective area, a light distribution is generated by selectively controlling the individual pixels, and this distribution can be varied accordingly. Preferably, the area is divided uniformly into rows and columns. However, it is also possible for the sub-areas to have different sizes and shapes and to be arranged irregularly.

[0017] High resolution means that the light distribution produced by the lighting device is divided into multiple areas (e.g., pixels or pixel arrays) which can be controlled independently. The number of pixels can be, for example, more than 100, 1000, 10000, or 100000. Such a lighting device allows for the implementation of new lighting functions or the adaptation and optimization of existing ones.

[0018] A lighting element can comprise a single, independently controllable light source with an emitted luminous flux. This is the case, for example, with LED modules. Alternatively, it can also refer to a device that converts light from a light source powering multiple lighting elements into an independently controllable luminous flux without affecting the light source itself. This is the case, for example, with modules based on LCD, DMD, or LDP technology.

[0019] An LCD lighting device comprises one or more light sources, in whose beam path an LCD display or LCD panel is placed. The LCD can have a resolution in rows and columns and is ideally high-resolution. Consequently, the area illuminated by the lighting device has the same resolution as the LCD. The desired light distribution is generated by switching the individual LCD pixels.

[0020] The light source of the LED lighting device features an LED matrix or LED pixel array, meaning the light source consists of many individually controllable LEDs, usually arranged in rows and columns. The desired light distribution can be adjusted by varying the brightness of the individual LEDs, which are typically dimmable in steps or continuously.

[0021] In a DMD (based on micromirror actuators) or DLP (Digital Light Processing) lighting device, the light beam is broken down into pixels by an arrangement of movable micromirrors and then reflected pixel by pixel either into the projection path or out of the projection path.

[0022] The problem is solved according to the invention, in particular, by a method for adjusting a headlight module with at least one first pixel which emits a first light beam with an adjustable luminous intensity. Meanwhile, a second pixel emits a second light beam, illuminating an overlap point at the intersection of the first and second light beams. The luminous intensity of the first pixel is adjusted such that a predetermined illuminance is achieved at the overlap point, with the first or second pixel taking over the luminous output of the other pixel if the latter fails.

[0023] According to the invention, the problem is further solved in particular by a headlight module which is suitable for carrying out the method.

[0024] Furthermore, a computer program for adjusting a headlight module is part of the invention. It is provided that the computer program is designed to execute a method according to the invention. In particular, a headlight module according to the invention can be used for this purpose.

[0025] In high-resolution headlight modules, the generation of a light distribution is no longer solely determined by the optical system, but can be flexibly adjusted by changing the setpoint values ​​of individual pixels or segments. The light distribution is generated from the superposition of individual pixels. This means that each pixel has a certain influence or contribution to the light distribution. To achieve the desired overall light distribution as accurately as possible, corresponding setpoint values ​​must be calculated for the various pixels of the individual light modules. The process calculates the necessary contribution of each individual pixel to the desired light distribution, or of each individual module to the desired overall light distribution. By changing the pixel setpoint values, the influence of the pixels on the light distribution can be adjusted.

[0026] Each headlight or light module has individually addressable (controllable) pixels that can be switched on, off, or dimmed accordingly. Based on a specified target overall light distribution, target values ​​for the luminous intensity or light distribution of the pixels of the respective headlight module can be calculated. The first pixel is part of the first headlight module. The second pixel can also be part of the first headlight module, but it doesn't have to be.

[0027] The light ray can spread out into a solid angle and, for example, form a cone- or pyramid-shaped shape. In an idealized model, it forms a ray with a constant cross-section, such as a cylindrical shape.

[0028] The point of intersection refers to the space occupied jointly by two light rays. This occurs where two light rays cross and form a point of intersection. In the idealized case of two infinitesimally small light rays, this would indeed be a single point. In reality, an overlapping surface or, in a three-dimensional view, an overlapping volume would form, since real light rays also have a certain width. For the present consideration, however, this makes no significant difference.

[0029] The light distribution here refers to the resulting luminous intensity of the light from the first and second pixels at an overlap point. The overall light distribution refers to the spatial distribution of the light, or luminous intensity, i.e., the light distributions of several or all pixels.

[0030] The overlap area, on the other hand, is the area, surface, or volume that both headlight modules illuminate together. It therefore essentially corresponds to the sum of all overlap points.

[0031] Because 2 pixels are involved in achieving the desired illuminance, this results in advantageous redundancy and more precise adjustment options.

[0032] In a further development of the invention, the second pixel is located in a second headlight module, and the luminous intensity (second luminous intensity) of the second pixel is adjustable. The first and second luminous intensities are adjusted so that the specified illuminance is achieved.

[0033] This offers the advantage of a wider range of adjustment options when both pixels are adjustable. For example, if one pixel is defective, the other can still be adjusted as closely as possible. Furthermore, both headlight modules can be manufactured identically.

[0034] The second pixel can either be set independently of the first pixel or dependently. In the latter case, for example, the second pixel can be set to a value inversely proportional to the first.

[0035] There are therefore several combinations that result in a predetermined target light distribution. The adjustment can be made proportionally, with the proportion ranging from 0-100% of the light output of the respective pixel.

[0036] According to a further development of the invention, the above-mentioned setting is carried out in the method for a plurality or for all pixels of the headlight module that form an overlap area of ​​their light beams with light beams from pixels of the second headlight module.

[0037] The overall light distribution of a high-resolution spotlight is generated by the spatial arrangement and, if necessary, the superposition of the light distribution of individual light modules. A single spotlight can consist of one or more individual light sources or light modules.

[0038] By considering the majority or all pixels that influence the overall light distribution, a target overall light distribution can be generated by superimposing individual pixels / segments from different headlight modules. If the overlapping areas were not taken into account and all pixels were driven with the same power, the overlapping area would be brighter than, for example, the edge areas, because the luminous intensity of the pixels in that area adds up.

[0039] In the overlapping area, several modules contribute to the generated light distribution according to specifications, each contributing a certain percentage. Such a specification could be a desired illumination pattern, e.g., homogeneous, with a brightness transition, or with increased or decreased illumination of objects or the road surface.

[0040] In particular, the two headlight modules can be the right and left headlights (front headlights) of a vehicle. Alternatively or additionally, they can also be high beam, low beam, city light modules, or modules for other specific light distributions. It is also possible, and especially so, to consider the overlapping of more than two headlight modules when using different module types for various lighting applications.

[0041] The same applies analogously to more than two headlight modules, as this is a superposition.

[0042] Advantageously, the desired total light distribution can be divided among the individual headlights or light modules.

[0043] According to a further development of the invention, the headlight module or the first pixel is measured in the method and photometric properties are determined.

[0044] Photometric properties include, in particular, system limits such as maximum brightness (illuminance), luminous efficacy, and luminous flux. Other photometric properties include solid angle, direction of the light beam, wavelength, black level, and voltage-brightness curve. Maximum brightness can be determined, for example, by projection onto a standard screen at a specific distance and subsequent measurement using suitable sensors (e.g., a camera).

[0045] Measurements can be carried out at the factory, continuously with a camera, e.g. an onboard camera, periodically or when the engine starts.

[0046] The individual headlight modules, or at least one pixel, several pixels, or all pixels, are individually measured using photometric analysis, thus determining the maximum properties of each headlight module. This means there is a clear correlation between the emitted angle (solid angle) and the maximum achievable illuminance. The photometric properties are therefore known and can be stored accordingly in the software.

[0047] By determining the photometric properties of all pixels and modules, it is possible to determine the maximum possible overall light distribution.

[0048] This also allows for adjustments to the target values. For example, target values ​​for a pixel can be determined and set depending on the photometric properties of other pixels. To achieve homogeneous illumination, for instance, all target values ​​can be set to the maximum brightness of the dimmest pixel.

[0049] According to a further development of the invention, the method takes into account the alignment and position of the headlight module in the vehicle.

[0050] The orientation and installation position of the headlight modules or pixels determine, according to geometric principles, whether an overlapping area exists and where the point of overlap is located. On the one hand, the orientation is crucial for whether the two light rays intersect at a common point. That is, the light rays from the first and second pixels should not be exactly parallel to each other. On the other hand, the installation position, or rather the distance between the two pixels (in the plane of intersection), determines where the point of overlap occurs, i.e., at what distance in the direction of travel, or at what distance from the headlight module.

[0051] Based on a target overall light distribution, target values ​​(luminous intensity) for the individual light modules can be calculated, taking into account the headlight position (position and orientation). This allows for the distribution of the target overall light distribution across the individual light modules, considering the headlight position (position and orientation) within the vehicle.

[0052] According to a further development of the invention, the method detects a misalignment of the individual pixels or the headlight module.

[0053] Due to manufacturing defects, wear and tear, or damage, misalignment of the pixels or a headlight module can occur. This results in the first pixel no longer overlapping with the originally intended second pixel at a specific location. A misaligned pixel may instead not overlap at all, overlap with the intended second pixel but at a different location (i.e., at a different distance), or overlap with a different second pixel than the intended one.

[0054] Starting with a target overall light distribution, target values ​​for the individual light modules can be calculated, taking into account the misalignment of individual pixels or pixel areas. The target overall light distribution can be divided among the individual light modules, considering the misalignment of individual pixels or pixel areas. If individual pixels or light modules are misaligned, the calculation of the target values ​​(light values) is adjusted to achieve the target overall light distribution as closely as possible.

[0055] According to a further development of the invention, the method detects a malfunction or failure of individual pixels or pixel areas.

[0056] This enables a method for calculating a pixel-based light distribution, taking into account the specific lighting characteristics of the headlights and malfunctions of individual pixels or segments.

[0057] Starting with a target overall light distribution, target values ​​(illuminance) for the individual light modules can be calculated, taking into account the malfunction of some pixels. This allows for the distribution of the target overall light distribution across the individual light modules, considering the malfunction of some pixels in the vehicle.

[0058] As already explained above, the inventive method provides that the first or second pixel takes over the light output of the other pixel if the latter fails, e.g. for the reasons mentioned.

[0059] In a particular embodiment, starting from a target overall light distribution, taking into account the headlight position (position and orientation) in combination with malfunction of individual pixels and detected misalignment of the headlight, target values ​​(luminous intensity) for the individual light modules or pixels are calculated.

[0060] In a special embodiment, the light intensity or luminous flux can be adjusted in more than 2 steps or continuously or continuously or dimmably.

[0061] In a special embodiment, headlight modules with LED technology are used. These are particularly suitable for dimming and can therefore convert target values ​​steplessly and thus with exceptional precision into a luminous flux.

[0062] In a further development of the invention, the adjustment is carried out depending on the distance in the method.

[0063] Due to the varying installation positions and orientations of the light modules within the vehicle, the overall light distribution will superimpose differently depending on the distance. When considering the projected light distribution onto a surface (e.g., a wall or road), illuminated areas will emerge, each generated by one or more light modules. This means that the influence of individual pixels or light modules on the overall light distribution is distance-dependent and can be taken into account when calculating the overall light distribution.

[0064] Conversely, this means that at a first distance from the vehicle or light module, two different pixels can form the overlap point than at a different distance.

[0065] Therefore, it would be possible to calculate the distance at which the overlap point should lie and thereby determine which pixels are involved in illuminating this overlap point. The target illuminance is then distributed among these relevant pixels.

[0066] Furthermore, the distance between the point or surface(s) on which the light beam strikes and the headlight module can also be taken into account. This can be achieved by a method for controlling a headlight module for a vehicle that illuminates the vehicle's surroundings, wherein the headlight module has a first pixel that can emit an independently dimmable or switchable luminous flux into a solid angle, thus illuminating a surface in the surroundings with an illuminance that is adjusted depending on the distance of the point or surface from the headlight module.

[0067] First, the distance to such an impact surface can be determined using the aforementioned procedure. An overlap point should then be located at this point (provided at least two pixels form such a point). Next, the pixels that form this overlap point are identified, and then the desired light distribution is applied to these pixels. This results in the desired total illuminance being sent to this impact surface.

[0068] Furthermore, points that are located at a greater distance and are therefore illuminated from a greater distance, e.g. a more distant stretch of road, can be illuminated more intensely, i.e. a greater target light distribution or illuminance can be set for them.

[0069] According to a further development of the invention, the illuminance is additionally adjusted in the method depending on the luminance.

[0070] By determining or measuring the luminance or ambient intensity, it is checked whether the target light values ​​(illuminance) are maintained or achieved. Strictly speaking, the calculation of distance-based, homogeneous illumination is only applicable for a specific surface property, i.e., with consistent or constant reflectance at all points. However, since objects have different reflectance properties, the target light values ​​(illuminance) can be adjusted according to the reflected light intensity (luminance). The reflected light can be measured using a suitable sensor (e.g., a camera), for example, by measuring its intensity. Ideally, the same camera used to determine the distance can be used for this purpose.

[0071] Furthermore, a homogeneous light distribution or a constant luminance can be set for at least one area of ​​the environment. Additionally, the illuminance can be reduced if it is too high, and conversely, it can be increased if it is too low.

[0072] Exemplary embodiments of the invention are explained in more detail below with reference to the drawings.

[0073] They show: Fig. 1. A superposition of individual pixel-based light modules on a projection screen (schematic representation), Fig. 2. The influence of individual light modules on the overall light distribution in a simplified representation, Fig. 3a Target values ​​for the light distribution of the left headlight module, Fig. 3b Target values ​​for the light distribution of the right headlight module, Fig. 3c Target values ​​of a resulting light distribution, Fig. 4a a flowchart for determining the target values ​​of individual light modules, taking into account the maximum headlight system limits, Fig. 4b a flowchart for determining the target values ​​of individual light modules, taking into account failure detection, misalignment and maximum headlight system limits and Fig. 5 a simplified representation of the distribution of the total light across the individual light modules, taking into account failed pixels or pixel areas.

[0074] Fig. Figure 1 shows a superposition of individual pixel-based light modules on a projection screen (schematic representation). A left spotlight module 11 and a right spotlight module 12 are shown, each with its respective pixel matrix, projecting their total light distribution onto a projection plane 13. This creates an overlap area 14 of several pixels.

[0075] A single pixel 16 in the right-hand headlight module 12 is not located within the overlap area 14 and is visible as a single pixel on the projection screen to the right. Another first pixel 15b of the right-hand headlight module 12 casts light onto the overlap area 14 in the form of a pixel 17. The corresponding second pixel 15a in the left-hand headlight module 11 casts light onto the same location 17 within the overlap area 14. The resulting illuminance of pixel 17 is thus determined by the sum of the illuminances of the first pixel 15b and the second pixel 15a.

[0076] Fig. Figure 2 shows a simplified representation of the influence of individual light modules on the overall light distribution. The proportion 21 of the left headlight module in the overall light distribution is shown superimposed on the proportion 22 of the right headlight module in the overall light distribution, which in turn are shown superimposed on the overall light distribution 23 when both headlights are superimposed. The abscissa represents the horizontal position of a series of headlight pixels, and the ordinate represents the luminous efficacy. This would be 50% if the pixels were evenly distributed. Since distribution is only possible in the overlap area, it is only performed in this area (the central part of the representation). To the left of the overlap area, the left headlight module illuminates at 100%, and to the right, the right headlight module illuminates at 100%. This distribution results in a constant light distribution as shown in Figure 23.

[0077] The Fig. Figure 3 shows target values ​​for the light distribution of the left and right headlight modules and a resulting overall light distribution projected onto a 25 m wall. An example of a target overall light distribution for a high-resolution LED matrix system consisting of a low beam and high beam component is shown. Fig. 3a shows the light distribution of the left and Fig. Figure 3b shows the light distribution of the right module. The result of the superposition of both headlights is visible in the overall light distribution in the Fig. Figure 3c shows the light distribution projected onto a wall 25 m away. Alpha and Beta denote the solid angles of the individual pixels. The scale on the right shows an iso lux value.

[0078] Fig. Figure 4a shows a flowchart for determining the target values ​​of individual light modules, taking into account the maximum headlight system limits.

[0079] The “proportion of individual modules to the total light distribution” 401, 416 is determined according to the following procedure: - Determination of the “properties of the light modules” 402, 417, in particular the “maximum performance of the left module” 403, 418 and the “maximum performance of the right module” 404, 420 which result in the values ​​LSV_Left_Max 405 and LSV_Right_Max 406. - Determination of the “maximum possible total light distribution” 407, 422, represented by the value LSV_MAX 408, 423 and a function “LSV_MAX Px(h,v,Lx)” 410, 425. - Determination of the “proportion of the respective module to the maximum total light distribution” 409, 424, represented by the weighting “ratio module n(h,v,[0..100%])” 411, 426.

[0080] The generation of an overall light distribution by superimposing individual pixels / segments from different light modules is achieved through: - “Calculation of a situation-dependent adaptive target total light distribution” (specification) 412, 428. - Determination of the “target overall light distribution taking into account the system limits” 413, 429 e.g. the headlight position (position and orientation) in the vehicle, using the function “LSV_MAX Px(h,v,Lx)” 410, 425. - Division of the target total light distribution according to the weighting 411, 426 onto a “right module” 414, 430 and “left module” 415, 431.

[0081] Fig. Figure 4b shows a flowchart for determining the target values ​​of individual light modules, taking into account failure detection, misalignment, and maximum headlight system limits. The sequence is as follows: Fig. 4a extended as follows, to generate a (fault-tolerant) overall light distribution by superimposing individual pixels / segments from different light modules: - with “Specifications for desired light distribution” 427, the “calculation of an adaptive target total light distribution” 412, 428 which should be achieved if possible is carried out. - Detection of malfunction or failure of individual pixels or pixel areas by means of a “fault and failure detection of the left module” 419 and “fault and failure detection of the right module” 421 following the determination of the maximum performance of the right 418, 403 and right 420, 404 module. - alternatively or additionally, detection of misalignment of the individual modules analogous to malfunction.

[0082] This allows the overall light distribution to be divided among the individual light modules, taking into account any failed pixels or pixel areas. If individual light modules or pixels fail, the calculation of the target values ​​is adjusted to achieve the best possible overall light distribution.

[0083] Alternatively or additionally, the overall light distribution can be divided among the individual light modules, taking into account the misalignment of individual pixels or pixel areas. If individual pixels or light modules are misaligned, the calculation of the target values ​​is adjusted so that the desired overall light distribution is achieved as closely as possible.

[0084] The same applies to the distribution of the "target total light distribution" across the individual light modules, taking into account the headlight position (position and orientation) in the vehicle.

[0085] Fig.Figure 5 shows a simplified representation of the distribution of the total light output across the individual light modules, taking into account any failed pixels or pixel areas. The proportion 51 of the left headlight module in the total light output is shown above the proportion 52 of the right headlight module in the total light output, which in turn are shown above the total light output 53 when both headlights are superimposed. The abscissa represents the horizontal position of a series of headlight pixels, and the ordinate represents the luminous efficacy. With an even distribution among the pixels, this would be 50%. If one pixel 54 fails, this would be 0%, and this is compensated for by controlling the second pixel 55 with twice the luminous efficacy of 100%. This correction results in a constant light output, as shown in Figure 53, despite the faulty pixel 54. Reference symbol list 11 Left headlight module 12 Right headlight module 13 projection surfaces 14 Overlap area 15a second pixel in the left headlight module 15b first pixel in the right headlight module 16 individual pixels in the right headlight module 17 Overlapping pixel / overlap point 21. Proportion of the left headlight module 22. Proportion of the right headlight module 23 Overall light distribution 401, 416 Proportion of individual modules to the total light distribution 402, 417 Properties of the light modules 403, 418 maximum performance of the left module 404, 420 maximum performance of the right module 405 LSV_Left_Max 406 LSV_Right_Max 407, 422 maximum possible total light distribution 408, 423 LSV_MAX 409, 424 Proportion of the respective module to the maximum total light distribution 410, 425 LSV_MAX Px(h,v,Lx) 411, 426 Ratio modul n(h,v,[0..100%]) 412, 428 Calculation of a current target total light distribution 413, 429 Target total light distribution taking into account the system boundaries 414, 430 right module 415, 431 left module 427 Specifications for desired light distribution 419 Error and failure detection of the left module 421 Error and failure detection of the right module

Claims

[1] Method for adjusting a headlight module (12) with at least one first pixel (15b) which emits a first light beam with an adjustable luminous intensity, while a second pixel (15a) emits a second light beam, wherein an overlap point (17) at the intersection of the first and second light beams is illuminated, wherein the luminance of the first pixel (15b) is adjusted so that a predetermined illuminance is reached at the overlap point (17), characterized by , that The first or second pixel takes over the light output of the other pixel if the latter fails. [2] Method according to claim 1, characterized by , that the second pixel is located in a second headlight module (11) and the light intensity of the second pixel (15a) is adjustable and The first and second light intensities are adjusted so that the specified illuminance is achieved. [3] Method according to claim 2, characterized by , that this setting is performed for a plurality or for all pixels of the headlight module (12) that form an overlap area (14) of their light beams with light beams from pixels of the second headlight module (11). [4] Method according to any of the preceding claims, characterized by , that the headlight module (12) or the first pixel (15b) is measured and photometric properties are determined (404, 420). [5] Method according to any of the preceding claims, characterized by , that the alignment and position of the headlight module (12) in the vehicle is taken into account. [6] Method according to any of the preceding claims, characterized by , that a misalignment of the individual pixels (15b, 15a) or of the headlight module (12) is detected. [7] Method according to any of the preceding claims, characterized by , that a malfunction or failure of individual pixels (15b, 15a) or pixel areas is detected (421). [8] Method according to any of the preceding claims, characterized by that the setting is performed depending on the distance. [9] Method according to any of the preceding claims, characterized by that the illuminance is additionally adjusted depending on the luminance. [10] Headlight module (12) with at least one first pixel (15b) which emits a first light beam with an adjustable luminous intensity, while a second pixel (15a) emits a second light beam, wherein an overlap point (17) at the intersection of the first and second light beams is illuminated, wherein the luminous intensity of the first pixel (15b) is adjustable so that a predetermined illuminance is achieved at the overlap point (17), characterized by, that the first or second pixel takes over the light output of the other pixel if the latter fails. [11] Computer program product for adjusting a headlight module for a vehicle, characterized by , that the computer program product is designed such that it performs a method according to one of claims 1 to 9, in particular with a headlight module according to claim 10.

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