Motor vehicle lighting system for radiometric position limited ground projection
By using a control unit in the vehicle lighting system to optimize the operation of the projection equipment, the problem of projection distortion caused by changes in chassis height was solved, and a uniform lighting effect was achieved at different height levels.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZKW GRP GMBH
- Filing Date
- 2023-07-31
- Publication Date
- 2026-06-23
AI Technical Summary
In the prior art, when systems for projecting ground images are used in conjunction with height-adjustable chassis vehicles, the ground images are easily distorted due to changes in chassis height.
By setting up a control unit in the vehicle lighting system to receive and evaluate chassis signals, the operation of the projection equipment is optimized to adapt to different chassis height levels. The optical axis angle, the size of the light-blocking opening, and the light source intensity of the projection equipment are adjusted to ensure the consistency of the projection range at each height level.
It ensures that the effective range of ground projection remains consistent across different chassis height levels, avoiding projection distortion and ensuring uniform lighting effects.
Smart Images
Figure CN117496847B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a vehicle lighting system for a motor vehicle with a height-adjustable chassis, the vehicle lighting system for projecting ground projections with limited positioning, wherein at least two predefined chassis height levels, namely level zero and at least one higher operating level, are provided, wherein the vehicle lighting system includes: at least two projection devices; a control unit connected to each projection device, the control unit being used to individually operate each projection device, wherein each projection device is configured for mounting in or on the motor vehicle, particularly in or on the lower panel of the vehicle door, wherein each projection device is further configured to project exactly one ground projection from the adjacent area of the vehicle to the laterally surrounding ground, up to the maximum critical horizontal angle, wherein all projection devices are fixed on a common support and arranged in a common plane and each has an optical axis, wherein the optical axes of the projection devices are oriented parallel to each other, wherein each projection device is a microlens projection module, wherein each microlens... The mirror projection module includes: a light source; an incident optics having a total number of micro-incident optics arranged in an array, wherein the incident optics are configured to receive light emitted by the light source; and an exiting optics having a total number of micro-exiting optics arranged in an array, wherein each micro-incident optics is associated with exactly one micro-exiting optics, wherein the micro-incident optics are configured and / or the micro-incident optics and the micro-exiting optics are arranged relative to each other such that all light emitted from the micro-incident optics is substantially incident only into the associated micro-exiting optics, and wherein the light pre-shaped by the micro-incident optics can be mapped by the micro-exiting optics into an area next to the vehicle as the ground projection in the installed state of the vehicle lighting system, wherein at least one light-shielding device is disposed between the micro-incident optics and the micro-exiting optics, wherein the radiation angle of each projection device in the installed state is oriented toward the horizontal plane boundary, more specifically, the radiation is inclined downward relative to the horizontal plane. Background Technology
[0002] Systems for projecting ground images are known from the prior art. Similarly, the use of micro-projection lens modules is known, for example, from WO 2015 / 058227A1 or WO 2019110374A1, which respectively illustrate the construction of micro-projection lens modules, which in principle are also applicable to use in this invention. These modules, for example, produce a near-light distribution where the edge of the light-shielding object is very strongly illuminated and thus the micro-incident optics are focused thereon. However, this invention differs slightly from these modules. In this invention, it is feasible not to focus on the edge of the light-shielding opening, but to achieve uniform illumination of the opening, so as to achieve uniform illumination under ideal conditions. That is, this can be so-called "Köhler illumination," where, as described, the focal point of the micro-incident optics is not necessarily located on the plane of the light-shielding object, but is offset relative to the plane of the light-shielding object (looking forward or backward in the direction of light radiation), so as to achieve uniform illumination over the entire area of the light-shielding opening.
[0003] The problem with existing ground projection modules is that, when used in conjunction with vehicles having height-adjustable chassis, the projected ground projection can be distorted depending on the chassis height setting. Summary of the Invention
[0004] Therefore, the object of the present invention is to eliminate this drawback of the prior art. This object is achieved by a motor vehicle lighting system of the type mentioned earlier, wherein, according to the invention, the control unit has a communication interface for receiving and evaluating chassis signals, wherein the chassis signals contain information about the actual state of chassis height levels, wherein for each chassis height level, at least one projection device optimized for this purpose is provided for operation, wherein for each projection device optimized for the chassis height level, an effective range limit for ground projection is generated based on the height present in the corresponding chassis height level and the critical horizontal angle associated with the corresponding projection device, wherein the optimization of the projection device is implemented such that the projection devices optimized for the corresponding chassis height level have different critical horizontal angles, more specifically, such that the critical horizontal angle of the projection device increases from the projection device optimized for level zero as the height of the chassis height level associated with the projection device increases corresponding to the height difference from level zero, such that for each chassis height level, at least one projection device is provided, the effective range limit of which, when operating for the chassis height level for which the corresponding projection device has been optimized, coincides with the effective range limit of the projection device for level zero.
[0005] In particular, it can be proposed that the control unit can be configured to disable the operation of the projection equipment, which is optimized for a chassis height level lower than the current chassis height level determined based on the chassis signal.
[0006] With this invention, it is possible to increase the relative height of the projection device without exceeding the effective range limit. The optical axis of the projection device can be understood as the axis along which radiation occurs from the incident optics to the exit optics. The radiation itself is then reduced by the light-blocking material, thereby affecting its spatial orientation.
[0007] Furthermore, it can be proposed that the control device manipulates the projection equipment in a configuration such that the projection equipment can continue to be activated, the projection equipment being optimized for operation at a higher chassis height level compared to the current determined chassis height level. This allows for the overlay of ground projections without exceeding the effective range limits.
[0008] In particular, it can be proposed that the control unit controls the projection device in a configuration such that animation can be projected by activating the projection device in a time sequence, wherein the activation time sequence also includes the projection device being optimized for operation at a higher chassis height level than the current chassis height level.
[0009] Furthermore, it can be proposed that, through the control unit, the operation of all projection devices not optimized for the current chassis height level be deactivated. The technical solution is characterized by extremely high robustness.
[0010] In particular, it can be pointed out that the difference between projection devices optimized for different chassis height levels lies in the spatial positioning on the vehicle. More precisely, as the optimization for lower chassis height levels increases, the installation height of the corresponding projection device increases. It can also be pointed out that the lowest-profile projection device can achieve the steepest angle α. max This ensures that the projection device is switched off from above as the height level increases, thus always ensuring the steepest projection angle while minimizing distortion.
[0011] Furthermore, it can be proposed that the incident and exit optics of all projection devices are identically constructed, while the design schemes of the shading devices for projection devices optimized for the corresponding chassis height level differ from one another.
[0012] In particular, it can be pointed out that the differences between projection devices optimized for different chassis height levels lie in the design of the light-shielding opening. More precisely, as the chassis height increases, the size of the light-shielding opening decreases accordingly. The light-shielding opening is preferably reduced to a size that does not exceed the maximum illumination range. A smaller size is understood as a smaller area of the light-shielding opening.
[0013] Furthermore, it can be proposed that the control unit is configured to adjust the radiation intensity of at least the following light sources, which are associated with projection devices other than zero-level projection devices.
[0014] In particular, it can be proposed that as the size of the opening in the light-blocking device decreases, the rated power of the light source of the corresponding projection device increases, resulting in the same light intensity distribution of light emitted by different projection devices. This means that the lower light transmittance caused by the smaller opening in the light-blocking device can be compensated for, allowing different optimized projection devices to produce the same bright illumination impression on the projection surface at the corresponding chassis height level.
[0015] Furthermore, it can be proposed that there are three or more chassis height levels.
[0016] Specifically, it can be proposed that the height difference between the zero level and the highest chassis height level is between 1cm and 20cm, and the chassis height levels are preferably evenly spaced from each other. For example, the interval can be 13cm and extend above three levels, wherein starting from the middle level, a downward adjustment of 55mm and an upward adjustment of 75mm are possible.
[0017] Furthermore, it can be proposed that, in the installed state of the motor vehicle lighting system, the effective range limit of the ground projection is between 0.5m and 3m, especially between 1m and 2m, wherein the effective range limit is measured along a flat ground at a normal distance from the longitudinal axis of the vehicle, starting from the normal projection of the lower panel of the vehicle door and extending to the end of the ground projection.
[0018] In particular, it can be proposed that the projection devices are arranged in a matrix on a common support and that an opaque isolation section is provided between adjacent projection devices.
[0019] Furthermore, it can be proposed that the motor vehicle includes at least two motor vehicle lighting systems according to any one of the above embodiments, wherein the motor vehicle has a left vehicle side and a right vehicle side, and each vehicle side has at least one door, the door having a lower door panel associated with the door, wherein projection devices are respectively provided in the lower door panel. Attached Figure Description
[0020] The invention will now be described in detail with reference to exemplary and non-limiting embodiments illustrated in the accompanying drawings. The drawings show:
[0021] Figure 1 A schematic diagram of a vehicle including two motor vehicle lighting systems according to the present invention is shown.
[0022] Figure 2 A schematic diagram showing the components of a motor vehicle lighting system is provided.
[0023] Figure 3 An exemplary view of a microlens projection module is shown.
[0024] Figure 4Exemplary configurations of micro-incident optics, micro-shielding materials, and micro-exit optics are shown.
[0025] Figure 5 This diagram shows the microlens projection module in its assembled state.
[0026] Figure 6a A schematic diagram showing the radial projection of the ground in the low chassis height class, and
[0027] Figure 6b A schematic diagram showing the radial projection of the ground in a high chassis height class.
[0028] In the following figures (unless otherwise stated), the same reference numerals denote the same features. Detailed Implementation
[0029] Figure 1 A schematic diagram of a vehicle 1 including two motor vehicle lighting systems 2 according to the present invention is shown. The motor vehicle 1 includes at least two motor vehicle lighting systems 2, wherein the motor vehicle 1 has a left vehicle side and a right vehicle side, and each vehicle side has at least one door 7, the door having a lower door panel 6 associated with the door 7, wherein projection devices 4a, 4b, 4c, and 4d are respectively provided in the lower door panel.
[0030] exist Figure 6a and Figure 6b As can be seen, the vehicle lighting system 2 is equipped with ground projections B4a and B4c for radiation positions that are restricted. The vehicle 1 here has a height-adjustable chassis 3 (see...). Figure 1 ), wherein there are at least two predefined chassis height levels S0, S1 (see Figure 6a and 6b The vehicle lighting system 2 includes at least two projection devices 4a, 4b, 4c, 4d (see [reference]). This includes level zero (S0) and at least one higher operating level (S1). Figure 2 ); a control unit 5 connected to each projection device 4a, 4b, 4c, 4d, the control unit being used to individually operate each projection device 4a, 4b, 4c, 4d, wherein each projection device 4a, 4b, 4c, 4d is configured for installation in or on the motor vehicle 1, particularly in or on the lower door panel 6 of the motor vehicle 1, wherein each projection device 4a, 4b, 4c, 4d is further configured to project exactly one ground projection B4a, B4C from the adjacent area α of the motor vehicle 1 when installed on the motor vehicle 1 and in an activated state. min It begins to radiate laterally onto the ground B, until the maximum critical horizontal angle α. maxa α maxcAll projection devices 4a, 4b, 4c, and 4d are fixed on a common support 4' and are positioned within a common plane E (see [reference]). Figure 6a ), and respectively have optical axes A4a and A4c (see Figure 2 The optical axes A4a and A4c of the projection devices are oriented parallel to each other. Each projection device 4a, 4b, 4c, and 4d constitutes a microlens projection module 4 (see...). Figure 3 Each microlens projection module 4 includes: a light source 41; an incident optics 42 having a total number of micro-incident optics 421 arranged in an array, wherein the incident optics 42 are configured to receive light emitted from the light source 41; and an exit optics 43 having a total number of micro-exit optics 431 arranged in an array, wherein each micro-incident optics 421 is associated with exactly one micro-exit optics 431, wherein the micro-incident optics 421 are configured as and / or micro-incident optics 421 and micro-exit optics 431. 31 are configured such that all light emitted from the micro-incident optics 421 is substantially incident only into the associated micro-exit optics 431, and wherein the light pre-shaped by the micro-incident optics 421 can be mapped by the micro-exit optics 431 into an area next to the vehicle 1 as said ground projection B4a, B4b in the installed state of the vehicle lighting system 2, wherein at least one light-shielding device 44 is disposed between the micro-incident optics 421 and the micro-exit optics 431, wherein the radiation angle of each projection device 4a, 4b, 4c, 4d in the installed state is oriented toward the horizontal plane H (see Figure 6a The boundary, or more precisely, the radiation is inclined downwards relative to the horizontal plane H.
[0031] The control unit 5 has a communication interface 5a for receiving and evaluating chassis signals S, wherein chassis signals S contain information about the actual state of chassis height levels S0, S1. For each chassis height level S0, S1, at least one projection device 4a, 4b, 4c, 4d optimized for this purpose is configured for operation. For each projection device 4a, 4b, 4c, 4d optimized for a chassis height level S0, S1, based on the heights h4c0, h4a0, h4c1, h4a1 present in the corresponding chassis height level S0, S1 and the critical horizontal angle α associated with the corresponding projection device 4a, 4b, 4c, 4d, the evaluation is performed on the chassis height level S0, S1. maxa α maxc The effective range limit D for generating ground projections B4a and B4b max (see Figure 6a ,6b).
[0032] The optimization of projection devices 4a, 4b, 4c, and 4d is implemented such that the projection devices 4a, 4b, 4c, and 4d optimized for the corresponding chassis height levels S0 and S1 have different critical horizontal angles α. maxa α maxc More precisely, the critical flat angle α of projection devices 4a, 4b, 4c, and 4d. maxa α maxc Starting with projection device 4a optimized for level 0 S0, as the height of the chassis height levels S0 and S1 associated with projection devices 4a, 4b, 4c, and 4d increases, it corresponds to the height difference Δh from level 0 S0 (see [reference]). Figure 6b This is increased to the point that for each chassis height level S0, S1, at least one projection device 4a, 4b, 4c, 4d is provided, the effective range limits D0, D1 of which the corresponding projection devices 4a, 4b, 4c, 4d are optimized for operation at chassis height levels S0, S1, and the effective range limits D0, D1 of the projection devices 4a, 4b, 4c, 4d for level zero S0 are also provided. max Consistent. In the currently shown embodiment, only two height levels S0 and S1 and only two projection angles of the projection device are shown. Of course, it is also possible to have multiple height levels and projection angles or projection devices, wherein each projection device is optimized for one height level, and each height level is associated with at least one projection device optimized for it.
[0033] It is possible to propose that the control unit 5 controls the projection devices 4a, 4b, 4c, and 4d in a configuration such that the operation of the projection devices 4a, 4b, 4c, and 4d is deactivated, and the projection devices are optimized for operation at a chassis height level S0, S1 lower than the current chassis height level S0, S1 determined according to the chassis signal S. Alternatively, the control unit 5 can control the projection devices 4a, 4b, 4c, and 4d in a configuration such that the projection devices 4a, 4b, 4c, and 4d can continue to be activated, and the projection devices are optimized for operation at a chassis height level S1 higher than the determined current chassis height level S0.
[0034] In particular, it can be proposed that the control unit 5 controls the projection devices 4a, 4b, 4c, and 4d in such a way that animation can be projected by activating the projection devices 4a, 4b, 4c, and 4d in a specific time sequence. The activated time sequence also includes the following projection devices 4a, 4b, 4c, and 4d, which are optimized for operation at a higher chassis height level S1 compared to the current chassis height level S0.
[0035] Alternatively, it can be proposed that the control unit 5 controls the projection devices 4a, 4b, 4c, and 4d to disable the operation of all projection devices 4a, 4b, 4c, and 4d, which are not optimized for the determined current chassis height levels S0 and S1.
[0036] Furthermore, it can be proposed that the difference between the projection devices 4a, 4b, 4c, and 4d optimized for different chassis height levels S0 and S1 lies in their spatial positioning on the vehicle 1. More precisely, as the height optimization for lower chassis height levels S0 and S1 is implemented, the installation height of the corresponding projection devices 4a, 4b, 4c, and 4d increases.
[0037] exist Figure 4 As can be schematically seen, the incident optics 42 and the exit optics 43 of all projection devices 4a, 4b, 4c, and 4d are identically constructed. The projection devices 4a, 4b, 4c, and 4d optimized for their respective chassis height levels S0 and S1 can differ in the design of the light-shielding device 44 to achieve different critical angles. In particular, it can be proposed that the projection devices 4a, 4b, 4c, and 4d optimized for different chassis height levels S0 and S1 differ from each other in the design of the light-shielding opening 441' of the micro-shielding 441 (see...). Figure 4 More precisely, with the increased height optimization for chassis height levels S0 and S1, the size of the corresponding light-shielding opening 441' is reduced.
[0038] It can be proposed that the control unit 5 is configured to adjust the radiation intensity of at least one light source 41 associated with projection devices 4c and 4d, excluding projection devices 4a and 4b at level zero S0. Advantageously, it can be proposed that as the size of the light-shielding opening 441' decreases, the rated power of the light source 41 of the corresponding projection devices 4a, 4b, 4c, and 4d increases, so that the light intensity of the light distribution emitted by the different projection devices 4a, 4b, 4c, and 4d is the same. This means that the lower light transmittance caused by the smaller light-shielding opening can be compensated for, so that the same bright illumination impression can be produced on the projection surface at the corresponding chassis height levels using different optimized projection devices.
[0039] Furthermore, it can be proposed that the difference between the height of the zero level S0 and the height of the highest chassis height level S1 is between 1 cm and 20 cm, and the chassis height levels S0 and S1 are preferably evenly spaced apart from each other.
[0040] In particular, it can be pointed out that, in the installation state of the motor vehicle lighting system 2, the effective range limit D of the ground projection is... max Between 0.5m and 3m, especially between 1m and 2m, the effective range limit D is... maxThe distance along the flat ground B from the normal projection of the lower door panel 6 of the vehicle to the end of the ground projection B4a, B4c is measured at a normal distance from the longitudinal axis x of the vehicle 1.
[0041] Furthermore, it can be proposed that projection devices 4a, 4b, 4c, and 4d are arranged in a matrix on a common support 4' (see [reference]). Figure 2 Furthermore, an opaque isolation section 4 is provided between adjacent projection devices 4a, 4b, 4c, and 4d.
[0042] about Figure 6a and Figure 6b It should be noted that the effective range of devices 4a and 4c is within Figure 6a and Figure 6b As exemplarily shown, the effective range is determined based on the chassis height class. Figure 6a This shows the effective range in height level S0. Figure 6b The effective range at altitude level S1 is shown, which is improved compared to level S0. The effective ranges D0 and D1 in level zero S0 are smaller than those in altitude level S1, more specifically, by a difference of ΔD. Therefore, in order to not exceed the maximum effective range limit D... max The upper projection device 4a can be turned off in height level S1. The effective range D1 of the lower projection device 4c or its corresponding radiation angle α maxc Here it is chosen such that the effective range D1 in height S1 is equal to the effective range D. max Exactly consistent. Therefore, by selectively turning each projection device on or off according to the chassis height, the ground projection can be kept as constant as possible and ensured not to exceed the limits, especially the maximum effective range D of the ground projection. max .
[0043] This invention is not limited to the embodiments shown, but is defined by the entire scope of the claims. Various aspects of the invention or its embodiments can also be incorporated and combined with each other. Any reference numerals in the claims are exemplary and used only for easier readability of the claims, and are not intended to be limiting.
Claims
1. A motor vehicle lighting system (2) for a motor vehicle (1), the motor vehicle having a height-adjustable chassis (3), the motor vehicle lighting system for radiating position-restricted ground projections (B4a, B4c), wherein at least two predefined chassis height levels (S0, S1), namely level zero (S0) and at least one higher operating level (S1), wherein the motor vehicle lighting system (2) comprises the following: - At least two projection devices (4a, 4b, 4c, 4d). - A control unit (5) connected to each projection device (4a, 4b, 4c, 4d), the control unit being used to individually operate each projection device (4a, 4b, 4c, 4d). wherein each projection device (4a, 4b, 4c, 4d) is designed to be mounted in or on a motor vehicle, wherein each projection device (4a, 4b, 4c, 4d) is furthermore designed to radiate exactly one ground projection (B4a, B4c) onto a laterally surrounding ground (B) from an immediate area (a min ) of the motor vehicle (1) up to a maximum critical flat angle (a max_a , a maxc ) in a state of being mounted on the motor vehicle (1) and being activated, wherein all projection devices (4a, 4b, 4c, 4d) are fixed on a common carrier (4') and arranged in a common plane (E) and each have an optical axis, wherein the optical axes of the projection devices are oriented parallel to one another, In the installed state, the radiation angle of each projection device (4a, 4b, 4c, 4d) is limited towards the horizontal plane (H), or more precisely, the radiation is tilted downward relative to the horizontal plane (H). Its features are, Each projection device (4a, 4b, 4c, 4d) constitutes a microlens projection module (4), wherein each microlens projection module (4) has: * Light source (41); * An incident optical device (42) having a total number of micro-incident optical devices (421) arranged in an array, wherein the incident optical devices (42) are configured to receive light emitted from the light source (41); * and an exiting optics (43), the exiting optics having a total number of micro-exiting optics (431) arranged in an array. Each micro-incident optic (421) is associated with exactly one micro-exit optic (431), wherein the micro-incident optic (421) is configured and / or the micro-incident optic (421) and the micro-exit optic (431) are arranged such that all light emitted from the micro-incident optic (421) is substantially incident only into the associated micro-exit optic (431), and wherein the light pre-shaped by the micro-incident optic (421) can be mapped by the micro-exit optic (431) into an area next to the vehicle (1) as the ground projection (B4a, B4b) in the installed state of the vehicle lighting system (2), wherein at least one light-shielding device (44) is disposed between the micro-incident optic (421) and the micro-exit optic (431). The control unit (5) has a communication interface (5a) for receiving and evaluating chassis signals (S), wherein the chassis signals (S) contain information about the actual state of the chassis height levels (S0, S1). For each chassis height level (S0, S1), for each operating setting, at least one projection device (4a, 4b, 4c, 4d) optimized for this purpose is configured. For each projection device (4a, 4b, 4c, 4d) optimized for chassis height level (S0, S1), based on the height (h4c0, h4a0, h4c1, h4a1) existing in the corresponding chassis height level (S0, S1) and the critical horizontal angle (α) associated with the corresponding projection device (4a, 4b, 4c, 4d), max_a α maxc The effective range limit (D_max) of the ground projection (B4a, B4b) is generated. The optimization of the projection devices (4a, 4b, 4c, 4d) is implemented such that the projection devices (4a, 4b, 4c, 4d) optimized for the corresponding chassis height levels (S0, S1) have different critical horizontal angles (α). max_a α maxc More precisely, the critical flat angle (α) of the projection devices (4a, 4b, 4c, 4d) max_a α maxc Starting with the projection device (4a) optimized for level zero (S0), as the height of the chassis height level (S0, S1) associated with the projection device (4a, 4b, 4c, 4d) increases, it corresponds to the height difference (Δh) with level zero (S0), such that each chassis height level (S0, S1) has at least one projection device (4a, 4b, 4c, 4d), and during operation of the chassis height level (S0, S1) for which the corresponding projection device (4a, 4b, 4c, 4d) is optimized, the effective range limit (D0, D1) of the projection device is consistent with the effective range limit (D_max) of the projection device (4a, 4b, 4c, 4d) for level zero (S0). The incident optics (42) and exit optics (43) of all projection devices (4a, 4b, 4c, 4d) are identically constructed. The projection devices (4a, 4b, 4c, 4d) optimized for their respective chassis height levels (S0, S1) differ from each other in the design of the light-shielding device (44). The projection devices (4a, 4b, 4c, 4d) optimized for different chassis height levels (S0, S1) differ from each other in the design of the light-shielding opening (441'). More precisely, as the height optimization increases for the chassis height levels (S0, S1), the size of the corresponding light-shielding opening (441') is reduced.
2. The motor vehicle lighting system (2) according to claim 1, wherein the control of the projection devices (4a, 4b, 4c, 4d) by the control unit (5) can be configured to disable the operation of the projection devices (4a, 4b, 4c, 4d) for a chassis height level (S0, S1) lower than the current chassis height level (S0, S1) determined according to the chassis signal (S).
3. The motor vehicle lighting system (2) according to claim 2, wherein the control of the projection devices (4a, 4b, 4c, 4d) by the control unit (5) is configured to enable the continued activation of the projection devices (4a, 4b, 4c, 4d) optimized for operation at a higher chassis height level (S1) compared to the determined current chassis height level (S0).
4. The motor vehicle lighting system (2) according to claim 3, wherein the control of the projection devices (4a, 4b, 4c, 4d) by the control unit (5) is configured such that an animation can be projected by activating the projection devices (4a, 4b, 4c, 4d) in a time sequence, wherein the activation time sequence further includes the projection devices (4a, 4b, 4c, 4d) being optimized for operation at a higher chassis height level (S1) compared to the determined current chassis height level (S0).
5. The motor vehicle lighting system (2) according to claim 2, wherein the control of the projection devices (4a, 4b, 4c, 4d) by the control unit (5) is performed such that the operation of all the following projection devices (4a, 4b, 4c, 4d) is disabled, the projection devices being not optimized for a determined current chassis height level (S0, S1).
6. The motor vehicle lighting system (2) according to any one of claims 1 to 5, wherein the difference between the projection devices (4a, 4b, 4c, 4d) optimized for different chassis height levels (S0, S1) lies in the spatial positioning performed on the motor vehicle (1), and more specifically, as the height optimization for the lower chassis height level (S0, S1) increases, the height of the mounting position of the corresponding projection devices (4a, 4b, 4c, 4d) is increased.
7. The motor vehicle lighting system (2) according to any one of claims 1 to 5, wherein the control unit (5) is configured to adjust the radiation intensity of at least the following light source (41), the light source being associated with a projection device (4c, 4d) other than the zero-level (S0) projection device (4a, 4b).
8. The motor vehicle lighting system (2) according to claim 7, wherein, As the size of the opening (441') of the light shield decreases, the rated power of the light source (41) of the corresponding projection device (4a, 4b, 4c, 4d) increases, so that the light intensity of the light emitted by different projection devices (4a, 4b, 4c, 4d) is the same.
9. The motor vehicle lighting system (2) according to any one of claims 1 to 5, wherein three or more chassis height levels (S0, S1) are provided.
10. The motor vehicle lighting system (2) according to any one of claims 1 to 5, wherein the difference between the height of the zero level (S0) and the height of the highest chassis height level (S1) is between 1 cm and 20 cm.
11. The motor vehicle lighting system (2) according to any one of claims 1 to 5, wherein in the installed state of the motor vehicle lighting system (2), the effective range limit (D_max) of the ground projection is between 0.5m and 3m, wherein the effective range limit (D_max) is measured along a flat ground (B) at a normal distance from the longitudinal axis (x) of the vehicle (1) from the normal projection of the lower door panel (6) of the motor vehicle to the end of the ground projection (B4a, B4c).
12. The motor vehicle lighting system (2) according to any one of claims 1 to 5, wherein the projection devices (4a, 4b, 4c, 4d) are arranged in a matrix on a common support (4') and an opaque isolation part (4'') is provided between adjacent projection devices (4a, 4b, 4c, 4d).
13. The motor vehicle lighting system (2) according to claim 1, wherein each projection device (4a, 4b, 4c, 4d) is configured to be installed in or on the lower door panel (6) of the motor vehicle (1).
14. The motor vehicle lighting system (2) according to claim 10, wherein the chassis height levels (S0, S1) are evenly spaced apart from each other.
15. The motor vehicle lighting system (2) according to claim 11, wherein in the installed state of the motor vehicle lighting system (2), the effective range limit (D_max) of the ground projection is between 1m and 2m.
16. A motor vehicle (1) comprising at least two motor vehicle lighting systems (2) according to any one of claims 1 to 15, wherein the motor vehicle (1) has a left vehicle side and a right vehicle side, and each vehicle side has at least one door (7), the door having a lower door panel (6) associated with the door (7), wherein the projection devices (4a, 4b, 4c, 4d) are respectively disposed in the lower door panel.