Lighting Module System and Method for Controlling the Light Module System

Abstract

Light module system, comprising a first light module and a second light module, wherein the first light module can be controlled in dependence on the second light module, wherein the first light module is configured as a non-high-resolution light module, and is set up to generate a light distribution of a first type (1, 10) in a region in front of the light module system, wherein the light distribution of the first type (1, 10) can be dimmed, the second light module is configured as a high-resolution light module, wherein a minimum brightness is associated with a sector (4) of the light distribution of the first type, and the second light module is set up to generate at least one ground-projection light distribution (3) in an operating mode, wherein the at least one ground-projection light distribution (3) is a visual presentation of information, and thereby to cause the first light module to, at least partially, dim the light distribution of the first type, and to illuminate the sector (4) of the light distribution of the first type.

Claims

1. A light module system, comprising: a first light module; and a second light module, wherein the first light module can be controlled in dependence on the second light module, wherein: the first light module is configured as a non-high-resolution light module, and is set up to generate a light distribution of a first type (1, 10) in a region in front of the light module system, wherein the light distribution of the first type (1, 10) can be dimmed, the second light module is configured as a high-resolution light module, a minimum brightness is associated with a sector (4) of the light distribution of the first type, and the second light module is set up to generate at least one ground-projection light distribution (3) in an operating mode, wherein the at least one ground-projection light distribution (3) is a visual presentation of information, and thereby to cause the first light module to, at least partially, dim the light distribution of the first type, and to illuminate the sector (4) of the light distribution of the first type.

2. The light module system according to claim 1, wherein the second light module is set up to illuminate the sector (4) of the light distribution in the operating mode, when the dimming of the light distribution of the first type results in the minimum brightness being achieved in the sector (4) of the light distribution of the first type.

3. The light module system according to claim 1, wherein the sector of the light distribution of the first type comprises a light-dark transition.

4. The light module system according to claim 1, wherein the first light module is a coarse resolution dipped beam module, the light distribution of the first type is a dipped beam distribution (1, 10), and the sector of the light distribution of the first type (4), with which the minimum brightness is associated, comprises a light-dark boundary (2).

5. The light module system according to claim 1, wherein the second light module can be operated in a further operating mode, wherein the second light module, in the further operating mode, generates a light distribution of a second type, wherein the light distribution of the first type and the light distribution of the second type together form an overall light distribution.

6. The light module system according to claim 1, further comprising a control device, which is associated with the first and second light modules, and is set up to control the first and second light modules, and to control the first light module in dependence on the second light module.

7. The light module system according to claim 1, wherein the second light module is set up to emit a high-resolution light distribution in a horizontal angular range between about −20° and about +20°.

8. A method for controlling a light module system of a motor vehicle headlight, wherein the light module system is a light module system in accordance with claim 1, which generates a light distribution, in which at least one piece of information is visually presented, the method comprising: generating a dimmable light distribution (1, 10) in a region in front of the light module system by means of the first light module, wherein a minimum brightness (1, 10) is assigned to a sector (4) of the dimmable light distribution; generating at least the ground-projection light distribution (3) in the region in front of the light module system by the second light module, so as to display the information; causing the first light module, by the second light module, to dim the dimmable light distribution (1), at least partially, so as to produce a dimmed light distribution (10); and illuminating the sector (4) of the dimmed light distribution (10) to which the minimum brightness is assigned, by the second light module.

9. The method according to claim 8, wherein the of causing the first light module to dim the dimmable light distribution (1) occurs immediately after the generating the at least one ground-projection light distribution (3), and wherein the illuminating the sector (4) of the dimmed light distribution (10) occurs either immediately after the first light module starts to dim the light distribution of the first type, or as soon as the minimum brightness is achieved in this sector (4).

10. The method according to claim 8, wherein the sector of the light distribution (4) of the first type, with which the minimum brightness is associated, comprises a light-dark transition.

11. The method according to claim 8, wherein the light distribution is a dipped beam light distribution (1) with a coarse resolution, and the sector of the light distribution of the first type (4), with which the minimum brightness is associated, comprises a light-dark boundary (2).

12. A computer program comprising commands, which are configured to execute the method according to claim 8.

13. A computer-readable medium comprising the computer

12. according to claim 12.

14. A motor vehicle control device for a light module system, according to one of the claims 1 to 7, with a comprising the computer-readable medium according to claim 13.

15. A motor vehicle comprising at least one light module system according to claim 1.

16. The light module system according to claim 4, wherein the light-dark boundary is an asymmetric light-dark boundary.

17. The light module system according to claim 5, wherein the light distribution of the second type is a partial main beam distribution.

18. The light module system according to claim 7, wherein the horizontal angular range is between about −12° and about +12°.

19. The light module system according to claim 7, wherein the horizontal angular range is between about −8.5° and about +8.5°.

20. The light module system according to claim 7, wherein the horizontal angular range is between about −7° and about +7°.

Description

[0063] The invention, including further advantages, is explained in more detail below on the basis of exemplary forms of embodiment, which are illustrated in the drawing. In the latter:

[0064] FIG. 1 shows a dipped beam distribution, and

[0065] FIG. 2 shows an assisted dipped beam light distribution, and a ground-projection light distribution.

[0066] In the following figures, unless otherwise stated, the same reference symbols denote the same features.

[0067] FIGS. 1 and 2 show light distributions that can be generated with the aforementioned light module system, which is controlled in accordance with the aforementioned method. The light module system can be arranged in a motor vehicle headlight, that is to say, in a motor vehicle.

[0068] Reference is first made to FIG. 1. This shows a dimmable dipped beam distribution 1, which is displayed on a measurement screen in a lighting technology laboratory, for example. FIG. 1 shows an orthogonal coordinate system that is used in most lighting technology laboratories. The X-axis of the system is the HH line, or the horizontal. This is a line on the measurement screen corresponding to the horizon. It runs parallel to the roadway (in the laboratory this is an imaginary roadway). The VV line, or the vertical, stands at right angles to the HH line, and intersects it at a point of intersection HV of the photometric beam axis from the centre of the light module with the measurement screen. The point HV is the origin of the coordinate system. The dimmable dipped beam distribution 1 has an asymmetrical light-dark boundary 2.

[0069] The dimmable dipped beam light distribution 1 can correspond to the light distribution of the first type, which is generated by the aforementioned first light module.

[0070] FIG. 2 shows the dimmable dipped beam light distribution 10 in a dimmed state—this is illustrated by a different dashed line pattern—in which the dimmed dipped beam light distribution has a reduced brightness. In addition, FIG. 2 shows a ground-projection light distribution 3 in the form of an arrow bent to the right. The arrow is a visual presentation of information. This can, for example, signal that a turn to the right is planned. As already mentioned, the ground-projection light distribution 3 can be configured in a variety of ways, and can thus visually present a variety of information. The ground-projection light distribution 3 can, for example, be navigation information, such as a directional arrow; lettering; a logo; pedestrian communication, e.g. in the form of a projected zebra crossing, welcome logos, or similar. A ground-projection light distribution of this type is often used to display graphic information and, as already mentioned, is abbreviated as “AIB”. The ground-projection light distribution 3 is generated by means of the aforementioned second light module, when the second light module is operated in the (first) operating mode. As soon as the ground-projection light distribution 3 is generated, the second light module causes the first light module to dim the dipped beam light distribution 1. The first light module then generates the dimmed dipped beam light distribution 10. The dipped beam light distribution 1 can also be dimmed after a (rather short) delay, after the ground-projection light distribution 3 has been generated. This increases the contrast and the visibility of the ground-projection light distribution 3, and thus improves the perceptibility of the information visually presented. As already mentioned, a predefined minimum brightness is assigned to a sector 4 of the dipped beam light distribution. This minimum brightness can, for example, be a legally prescribed minimum brightness. This means that in a dimmed state, the dipped beam distribution 1 is not to fall below the minimum brightness, that is to say, is not to fall below the minimum brightness values. In particular, if the minimum brightness is prescribed by law, the brightness must not fall below this value. In the further (second) operating mode, the second light module can generate a partial main beam distribution.

[0071] FIGS. 1 and 2 show that in the context of the present invention, the term “sector of a light distribution” is understood to mean a spatially bounded region. The brightness of such a sector can be varied without changing the shape of the sector.

[0072] In order not to fall below the minimum brightness, the second light module assists the first light module by illuminating the sector 4 of the dipped beam light distribution 1 while it is operated in the aforementioned (first) operating mode, and generates the ground-projection light distribution 3. FIG. 2 shows that this sector 4 comprises a sector of the asymmetric light-dark boundary 2. By the illumination of the sector 4 with the second light module, it is possible, for example, to achieve the same brightness in this sector 4 as with the undimmed dipped beam light distribution 1—this is illustrated by the same dashed line pattern. It is to be understood that with the aforementioned light module system, or method, or motor vehicle headlight, or motor vehicle, the same brightness in the sector of the light distribution of the first type, which is illuminated by the second light module, can be achieved for other light distributions, or for otherwise configured sectors of the light distributions.

[0073] For the sake of brevity, the above description of the invention has been limited to those components that can be helpful in explaining the invention. The person skilled in the art clearly understands from the description that a light module system, for example, can have a multiplicity of further components not explicitly mentioned here, such as adjustment and setting devices, electrical supply means, a sensor means, for example one or a plurality of cameras for determining the brightness of the emitted light distributions, and much more.

[0074] The reference numerals in the claims serve only to facilitate an understanding of the present inventions, and in no way imply any limitation of the present inventions.