KR20210093297A - Automotive lighting system - Google Patents

Abstract

The present invention relates to a lighting system (10) for an automobile, comprising: first and second laser scanners (100, 200) with first and second microscanners (120, 220); and - a control device 400 configured to actuate the first and second microscanners 120 , 220 , wherein the oscillating behavior of the first and second microscanners 120 , 220 is at least controlled It can be controlled via parameters of oscillation amplitude (AMP), optical center displacement (LSVP) and offset value (OFFSET), which can be varied via device 400 , and control device 400 provides time-varying input parameters (DOA), wherein the input variable represents a target opening angle of the entire light distribution 300 and according to the test result of the criterion of the input variable (DOA), namely DOA ≤ (MEMSmax - ALPHA) first and second 2 Determine the parameters of the vibration amplitude (AMP), the optical center displacement (LSVP) and the offset value (OFFSET) of the microscanners 120 and 220, and when the criteria are met, the parameters of the first microscanner 120 are it is decided

Description

Automotive lighting system

The present invention relates to a lighting system for a vehicle, said lighting system comprising:

- a first laser scanner having at least one laser light source, the laser light source being assigned a first microscanner, said first microscanner being configured to deflect the laser beams of the laser light source into a first light converting element, Thereby visible light is emitted on the first light converting element to produce a first light pattern, wherein the first light converting element has an optical mapping system for mapping the first light pattern as a first partial light distribution in front of the illumination system. is assigned, the first laser scanner; and

- a second laser scanner having at least one laser light source, the laser light source being assigned a second microscanner, said second microscanner being configured to deflect the laser beams of the laser light source into a second light converting element, Thereby visible light is emitted on the second light converting element to form a second light pattern, on the second light converting element an optical mapping system for mapping the second light pattern as a second partial light distribution in front of the illumination system which is allocated, the second laser scanner; and

the first and second partial light distributions can be varied according to at least three parameters that can be set on the respective microscanners,

The variable first and second partial light distributions create one common variable overall light distribution in front of the lighting system and at least partially overlap each other, the overall light distribution having an opening angle and

The first and second microscanners are respectively rotatably mounted about an axis that is parallel to each other, and the first and second microscanners vibrate about the axis with a determinable vibration amplitude (AMP) while centered at a zero position. where the vibration amplitude is limited through a maximum value (MEMSmax), the vibration amplitude (AMP) determines the horizontal width of the respective partial light distribution produced, and

The first and second microscanners are disposed along an imaginary line, the zero position of the first microscanner is by a first angle ALPHA, and the zero position of the second microscanner is a second angle ALPHA' ) inclined with respect to the imaginary line, and the first and second angles are opposite to each other, and

The first and second partial light distributions each have one light center, characterized in that they have a maximum respective light intensity, the light center corresponding to a determinable light center displacement (LSPV) on the respective microscanners. can be displaced, and

The partial light distributions can each be displaced by an offset value OFFSET that can be fed to the respective microscanners, and

the lighting system

- a control device configured to actuate the first and second microscanners, wherein the oscillation behavior of the first and second microscanners is, at a minimum, an oscillation amplitude (AMP) which can be varied via the control device, an optical center displacement ( LSVP) and the offset value (OFFSET), the control device;

The invention also relates to a motor vehicle comprising at least one lighting system according to the invention.

Laser projection systems can be realized through the deflection of a laser beam through so-called microscanners. The microscanners can be formed, for example, as micro-mirrors manufactured with MEMS technology or MOEMS technology (MEMS: micro-electro-mechanical systems; MOEMS: micro-opto-electro-mechanical systems), these micro-mirrors having a diameter of only a few millimeters and Or it can vibrate in two axial directions.

In this case, the vibration amplitude determines the width of the generated light pattern or partial light distribution.

The oscillation speed, or angular deflection in the case of microscanners, varies with time (angular velocity). Since a "slowly" moving light spot generates more light within the light converting element than a fast moving light spot, it can usually equally affect the light distribution in this way.

When using two laser scanners whose generated partial light distributions together form one overall light distribution, unintended effects may occur if the vibration amplitudes can be set differently, for example the total light distribution There can be two luminance maxima in the distribution.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved lighting system for automobiles.

The task is that the control device is configured to receive a time-varying input variable DOA, the input variable representing a target opening angle of the overall light distribution and a reference of the input variable DOA, namely DOA Determine the parameters of vibration amplitude (AMP), optical center displacement (LSVP) and offset value (OFFSET) of the first and second microscanners according to the test result of ≤ (MEMSmax - ALPHA), and the maximum vibration amplitude (MEMSmax) denotes the maximum angle about each axis, and when the criterion is met the parameters of the first microscanner are determined as

AMP = DOA,

OFFSET = ALPHA,

LSPV = 0°,

The parameters of the second microscanner are determined as follows,

AMP = DOA,

OFFSET = -ALPHA,

LSPV = 0°,

And when the criterion is not met, the parameters of the first microscanner are determined as follows,

AMP = (DOA + MEMSmax - ALPHA)/2,

OFFSET = MEMSmax - AMP,

LSPV = DOA - AMP,

The parameters of the second microscanner are determined as follows.

AMP = (DOA + MEMSmax - ALPHA)/2,

OFFSET = -(MEMSmax - AMP),

LSPV = -(DOA - AMP).

Laser light sources generally emit coherent monochromatic light to a narrow wavelength range, but in the case of automobile headlamps, generally, white mixed light is preferred or legally stipulated for emitted light, so laser light sources have , so-called light conversion elements for converting substantially monochromatic light into white to polychromatic light are assigned, "white light" means light of said spectral composition which causes the color impression of "white" to a person. The light conversion element is formed, for example, in the form of one or a plurality of photoluminescent converters or photoluminescent elements, and the incident laser beams of the laser light source generally impinge on the light conversion element comprising the photoluminescent dye to emit the photoluminescent dye. Excitation causes photoluminescence, and at the same time emits light in a wavelength or wavelength range different from that of the irradiated laser device. In this case, the light emission of the light conversion element substantially retains the characteristics of a Lambert emitter.

In the case of light conversion elements, it is divided into a reflective conversion element and a transmissive conversion element.

The terms "reflective" and "transmissive" in this context relate to the blue component of the converted white light. In the case of a transmissive structure, the main propagation direction of the blue light component after passing through the converter volume or the conversion element is oriented substantially the same with respect to the propagation direction of the output laser beam. In the case of a reflective structure, the laser beam is reflected and deflected on an interface that can be assigned to a conversion element, whereby the blue light component has a different propagation direction than the laser beam, which is generally formed as a blue laser beam.

In practice, on the road the entire light distribution is formed through the superposition of partial light distributions, the first laser scanner being located, for example, in the left vehicle headlamp and the second laser scanner being located, for example, in the right vehicle headlamp, whereby the resulting The overall light distribution will be generated by the left and right vehicle headlamps of the vehicle.

Preferably, the laser light sources can be dimmed.

In a suitable embodiment, the first angle ALPHA—measured from the imaginary line—may be 2° and the second angle ALPHA′ may be -2°.

Also, microscanners may be formed as quasi-static microscanners.

Microscanners can be oriented in one dimension (the mirror is moved in only one direction), or in two dimensions (the mirror is moved in two directions simultaneously). Most of the currently available microscanners operate according to the resonant driving principle. In this case, MEMS scanners represent a mechanical oscillation circuit that is excited at its own resonant frequency and vibrates in a sinusoidal shape. Such sinusoidal waveforms present a major problem with the use of realized laser power, since the light distribution is always brightest where microscanners achieve the minimum angular velocity. Thus, during sinusoidal oscillation, the edge region of the light distribution may act brightest and the central region or center of the light distribution may act darkest, so that the laser diodes must be strongly dimmed and thereby only a small percentage (about 40 %) can only be used.

Here, the remedy is sought by quasi-static microscanners that can be arbitrarily controlled with their angular velocity within fixed physical limits (resonant frequency, etc.). Thus, it is possible to deflect most of the light generated from the center to the center of the partial light distribution, whereby the realized laser power utilization of the laser light sources can be raised to about 90% in typical partial light distributions. The use of 100% is not possible, since microscanners implement a change of direction in the edge region, which means complete "braking" of the mirror, followed by acceleration in the opposite direction. During this phase, the laser light sources are deactivated, since otherwise the luminous intensity in the transition region may rise obviously there due to the low angular velocity observed at the center, which is not intended.

Also, the maximum value (MEMSmax) of the vibration amplitude of the microscanners may be 6°.

In addition, the control device can actuate the laser light sources.

Furthermore, the object of the invention is solved by means of a motor vehicle comprising at least one lighting system.

In this case, the time-varying target opening angle DOA of the entire light distribution may vary according to the speed of the vehicle, and when the speed of the vehicle increases, the target opening angle DOA is decreased.

In the following, the invention is explained in more detail on the basis of illustrative drawings.

1 is a first laser scanner having a first microscanner; a second laser scanner having a second microscanner; It is a diagram illustrating an example illumination system comprising: the microscanners each inclined by a first to a second angle, the microscanners having parameters that can be varied through a control device, and the first laser scanner being a first generating a partial light distribution and the second laser scanner generates a second partial light distribution, the first and second partial light distributions together produce one full light distribution with an opening angle, the total light distribution is determined by the measuring screen mapped onto the
2 is a graph showing a characteristic curve of an example of a microscanner, in which the vibration amplitude (AMP) is plotted against angular velocity, and the maximum vibration amplitude (MEMSmax) is 6°.
FIG. 3A is a graph showing the changed vibration amplitude (AMP) of the characteristic curve in FIG. 2 .
FIG. 3B is a graph showing the optical center displacement (LSVP) in the characteristic curve of FIG. 2 .
3C is a graph showing the displacement of the characteristic curve through the offset value OFFSET.
Fig. 4a is a graph showing first to second partial light distributions on the measurement screen for different opening angles, wherein the first and second angles of the respective microscanners are zero.
Fig. 4b is a graph showing the overall light distribution composed of the partial light distributions in Fig. 4a on the measurement screen;
Fig. 5a is a graph showing first partial light distributions for a specific opening angle, wherein the first microscanners are inclined by 2° in the area, and for the individually shown partial light distributions, the light center is displaced in the direction of the center; has been
Figure 5b is a graph showing the second partial light distributions for a specific opening angle, the second microscanners are inclined by -2° in the area, and for the individually shown partial light distributions, the light center is in the direction of the center; is displaced.
FIG. 5C is a graph showing total light distributions for a specific opening angle, and the total light distribution is composed of partial light distributions in FIGS. 5A and 5B .
6A is a graph showing first partial light distributions for a specific opening angle, and parameters of the first microscanner are set according to a criterion according to the present invention.
6B is a graph showing second partial light distributions for a specific opening angle, and parameters of the second microscanner are set according to the criteria according to the present invention.
6C is a graph showing total light distributions for a specific opening angle, and the total light distribution is composed of partial light distributions in FIGS. 6A and 6B .
6D is a graph showing the overall light distributions in FIG. 6C for a specific opening angle, with the corresponding laser light sources dimmed on the edges of each overall light distribution.

1 , an exemplary illumination system 10 for a vehicle is shown, the illumination system 10 comprising a first laser scanner 100 having at least one laser light source 110 , the laser light source comprising: A first microscanner 120 is assigned, which first microscanner 120 is configured to deflect the laser beams of the laser light source 110 to a first light converting element 130 , thereby converting the first light Visible light is emitted on the element 130 to create a first light pattern, and on the first light converting element 130 a first light pattern is mapped as a first partial light distribution 150 in front of the lighting system 10 . To do so, an optical mapping system 140 is assigned.

In addition, the illumination system 10 includes a second laser scanner 200 having at least one laser light source 210 , and a second microscanner 220 is assigned to the laser light source 210 , and the second The microscanner 220 is configured to deflect the laser beams of the laser light source 210 to the second light conversion element 230 , whereby visible light is emitted on the second light conversion element 230 to form a second light pattern. generated, the second light converting element 230 being assigned an optical mapping system 240 for mapping a second light pattern as a second partial light distribution 250 in front of the illumination system 10 .

The first and second microscanners are formed as quasi-static microscanners in this example. In this regard, Fig. 2 shows graphs showing the different vibrational behaviors of a resonant microscanner (dashed line) and a quasi-static microscanner (solid line).

In this case, the resonant microscanners represent a mechanical oscillation circuit that is excited at substantially their own resonant frequency and vibrates in a sinusoidal shape. The sinusoidal waveform presents a major problem associated with the use of implemented laser power, since the light distribution is always brightest where microscanners achieve the minimum angular velocity. Thus, during a sinusoidal oscillation, the edge region of the light distribution may act as the brightest and the central region or center of the light distribution may act as the darkest, so that the laser diodes must be strongly dimmed and thereby only be used in a small percentage. because it can

Here, the remedy is sought by quasi-static microscanners that can be arbitrarily controlled with their angular velocity within defined physical limits. Thus, it is possible to deflect most of the light generated from the center to the center of the partial light distribution, whereby the utilization of the realized laser power of the laser light sources can be increased. It should be noted here that microscanners implement a change of direction in the edge region, which means complete "braking" of the mirror, followed by acceleration in the opposite direction. During this phase, the laser light sources are deactivated, since otherwise the luminous intensity in the transition region may rise obviously there due to the low angular velocity observed at the center, which is not intended.

The first and second partial light distributions 150 , 250 are exemplarily shown in at least three parameters that can be set on the respective microscanners 120 , 220 , namely FIGS. 3A , 3B and 3C . The variable first and second partial light distributions 150 , 250 , which can be varied depending on the AMP, LSPV and OFFSET present in the lighting system 10 , are one common overall light distribution which can be varied in front of the lighting system 10 ( 300) and at least partially overlap each other, and the overall light distribution 300 retains an open angle.

It should be noted that the partial light distributions 150 , 250 and the formed total light distribution 300 are used in the example shown in the figures for example in a lighting engineering laboratory and are arranged perpendicular to the main radiation direction of the laser scanner. that it is mapped onto the measurement screen MS. The typical separation distance of the measuring screen to the device to be measured is 25 m according to ECE regulations.

The first and second microscanners 120 and 220 are rotatably mounted about axes X1 and X2 that are respectively parallel to each other, and the first and second microscanners 120 and 220 are positioned at zero It can vibrate about each axis (X1, X2) with a determinable vibration amplitude (AMP) centered on , and the vibration amplitude (AMP) is limited through the maximum value (MEMSmax), and the vibration amplitude (AMP) is each The horizontal width of the generated partial light distributions 150 and 250 is determined. The opening angle of the partial light distribution to the oscillation amplitude (AMP) of the microscanner can be varied dynamically (in fine steps) so that the luminance is based on a relatively smaller illumination area, e.g. the speed of the illumination range. There is a clear increase through the increase in . In Fig. 3a the vibration amplitude AMP is shown, for example limited to +/- 2°, where the angular velocity is increased by being smaller in the zero position range of the microscanner than in the characteristic curve in Fig. 2 . It is confirmed that the luminosity is caused.

The first and second partial light distributions 150 , 250 each have one light center characterized by their respective luminous intensity being maximal, the light center being on the respective microscanners 120 , 220 , respectively. It can be displaced corresponding to a determinable optical center displacement (LSPV). The light center, as already described above, is formed through the deflection region of the microscanner with the minimum angular velocity (edge regions or turning points are excluded here). In Fig. 3b, the optical center displacement of the characteristic curve in Fig. 2 is shown, and the microscanner moves the slowest in the region where the optical center is intended.

The partial light distributions 150 and 250 can each still be displaced by an offset value OFFSET that can be fed to the respective microscanners 120 and 220 , the mode of action of this parameter being shown in FIG. 3c as an example has been The microscanner parameter OFFSET makes it possible to add an offset value to the angular movement of each microscanner. The graph in FIG. 3C shows an example with an offset value of 2° under the condition of an oscillation amplitude of 4°. Here, the optical center displacement (LSPV) is set to 0°.

In addition, the illumination system 10 further comprises a control device 400 configured to operate the first and second microscanners 120 , 220 , The oscillation behavior can be controlled, at a minimum, via parameters of oscillation amplitude AMP, optical center displacement LSVP and offset value OFFSET, which can be varied via the control device 400 . In addition, the control device 400 indicates the target opening angle of the entire light distribution 300 and sets the parameters of the first and second microscanners 120 and 220 correspondingly, the time-varying input variable DOA ) is configured to receive

In addition, the first and second microscanners 120 and 220 in FIG. 1 are arranged along an imaginary line, and the zero position of the first microscanner 120 is by a first angle ALPHA, and the second microscanner The zero position of 220 is disposed inclined with respect to the imaginary line by a second angle ALPHA', and the first and second angles ALPHA, ALPHA' are opposite to each other, for example, the first angle ALPHA is 2 °, and the second angle ALPHA' is -2°.

4A and 4B, respectively, graphs of partial light distributions for different DOA values and total light distributions generated based on them are shown, in relation to the first angle ALPHA and the second angle ALPHA′. is 0°, resulting in symmetric partial light distributions. A symmetrical light distribution exists when the central position of the partial light distribution also corresponds to the central position of the microscanner deflection.

It should be noted that, in the graphs shown in FIGS. 4A to 6D , the relative light output corresponding to the inverse proportion of the angular velocity of each microscanner is shown. The slower the microscanner is moved, the more light output is emitted in the area it passes through. For this reason, the graphs shown are always inversely proportional to the angular velocity of each microscanner.

Another thing to note is that angle values are written in all graphs. Said drawing is inevitably always correct only for one predetermined projection spacing, since the two laser scanners are spaced apart from each other, for example by the vehicle width. For example the projection spacing is 25 m as required by the ECE directives. Nevertheless, the drawings have been chosen to provide a better understanding.

The dotted line in FIG. 4A indicates a DOA value of 6°, which corresponds to a partial light distribution of -6° to +6° on the measurement screen and represents the widest partial light distribution. DOA values are generally shown as “+” values, eg DOA = 6°, however, this always corresponds to a symmetrical illumination area of +/- 6°. With the decrease of the DOA value, the illumination range is further reduced, thereby strongly increasing the light output in the remaining angular range. Since both laser scanners cover the same angular range in the resulting partial light distribution in the example above in FIGS. 4A and 4B , the light output is doubled through the superposition of the two partial light distributions, which is confirmed in FIG. 4B .

Asymmetric partial light distribution exists when the central position of the partial light distribution does not correspond to the center position to the zero position of the microscanner deflection. This exists, for example, when the respective microscanners are arranged rotated by a predetermined angle with respect to each other. In the example shown in Figures 5a, 5b and 5c below, the first angle ALPHA is +2° and the second angle ALPHA' is -2°. In other words, the central positions of the partial light distribution are each displaced by 2°. Through rotation of the microscanners, a wider basic light distribution than horizontally is created. In addition, in order to obtain a region having the maximum luminous intensity at the center of the overall light distribution, the light centers of the partial light distributions must be displaced back to the center. This is done through a parameter (LSPV) that keeps the vibration amplitude of the microscanners intact, but moves the region where the microscanner vibrates the slowest closer to the center of the overall light distribution, or closer to the center on the measurement screen. .

In this regard, in Fig. 5a first partial light distributions of a first laser scanner are shown, in Fig. 5b second partial light distributions of a second laser scanner are shown, besides having different vibration amplitudes. Alternatively, a plurality of partial light distributions for different opening angles (DOA values) of the overall light distribution are also shown. In the figure, it is confirmed that when the DOA values are different, the light center should always be matched so that the light center stays in the center of the overall light distribution. This is not practically possible when DOA values are very low, since in conventional microscanner systems the optical center is limited to a fixed percentage of the vibration amplitude of the microscanners.

It is also confirmed that the optical centers for DOA values of 4 and 4.5° are no longer displaced to the center. The reason is that, as already mentioned, the optical center is always displaced only to a maximum of about 80% of the vibration amplitude.

In Fig. 5c, the overlap of the partial light distributions in Figs. 5a and 5b is shown, where it is confirmed that unintended effects such as a double light center occur when DOA = 8°. Also, when the DOA values decrease, not only the outer edges or boundaries move inward, but also the two boundaries of the first and second microscanners, respectively, move inward. In doing so, upon conversion of DOA values, luminance steps that are “shifted” in the interior of the light distribution occur.

In order to minimize or completely avoid these unintended effects, the control device 400 for operating the first and second microscanners 120 , 220 is configured to receive a time-varying input variable DOA and , the input variable represents the target opening angle of the entire light distribution 300 and the first and second microscanners 120 and 220 according to the test result of the input variable DOA standard, that is, DOA ≤ (MEMSmax - ALPHA) determine the parameters of the oscillation amplitude (AMP), the optical center displacement (LSPV) and the offset value (OFFSET) of , where the maximum oscillation amplitude (MEMSmax) represents the maximum angle centered on each axis (X1, X2), And when the criteria are met, the parameters of the first microscanner 120 are determined as follows,

AMP = DOA,

OFFSET = ALPHA,

LSPV = 0°,

The parameters of the second microscanner 220 are determined as follows,

AMP = DOA,

OFFSET = -ALPHA,

LSPV = 0°,

And when the criteria are not met, the parameters of the first microscanner 120 are determined as follows,

AMP = (DOA + MEMSmax - ALPHA)/2,

OFFSET = MEMSmax - AMP,

LSPV = DOA - AMP,

The parameters of the second microscanner 220 are determined as follows.

AMP = (DOA + MEMSmax - ALPHA)/2,

OFFSET = -(MEMSmax - AMP),

LSPV = -(DOA - AMP).

In FIGS. 6A and 6B , first and second partial light distributions are ascertained, wherein the algorithm specified above is applied for setting of parameters via the control device 400 .

In FIG. 6A , it is confirmed that when DOA values are high, only the left light-dark boundary of the partial light distribution is displaced inward. When the DOA value is 4° (in this example), a transition towards a symmetric partial light distribution occurs, whereby the left contrast boundary as well as the right contrast boundary are uniformly shifted inward. In FIG. 6b , in principle only the first partial light distributions in FIG. 6a are shown in a reflected manner.

In FIG. 6C , the overlaps of the partial light distributions in FIGS. 6A and 6B are shown for different DOA values.

In practice, the luminance profile of partial light distributions or even of the basic light distributions that can be generated is not generated solely through the angular velocity of microscanners, since the microscanner is not capable of generating arbitrary velocity profiles, but the addition of laser light sources This is because dimming is performed. This is especially necessary in the edge region, since microscanners have a limited maximum speed. In transition regions not identified in the graphs, the laser light source is completely shut down or deactivated. In this regard, the control device 400 is configured to actuate the laser light sources correspondingly. The profiles described above can be improved through further dimming of the laser light sources in the "left" and "right" edge regions in the sense of a transition from light to dark, for example in FIG. 6d .

Claims (8)

A lighting system (10) for a vehicle, said lighting system (10) comprising:
- A first laser scanner 100 having at least one laser light source 110 , wherein the laser light source 110 is assigned a first microscanner 120 , the first microscanner 120 includes a first light source configured to deflect the laser beams of the laser light source 110 into the conversion element 130 , whereby visible light is emitted on the first light conversion element 130 to produce a first light pattern, the first light conversion element ( 130 , a first laser scanner 100 , assigned an optical mapping system 140 for mapping a first light pattern as a first partial light distribution in front of the illumination system 10 ; and
- A second laser scanner 200 having at least one laser light source 210, wherein a second microscanner 220 is assigned to the laser light source 210, and the second microscanner 220 is a second light source configured to deflect the laser beams of the laser light source 210 into the conversion element 230 , whereby visible light is emitted on the second light conversion element 230 to form a second light pattern, the second light conversion element ( 230 includes a second laser scanner 200 to which an optical mapping system 240 is assigned for mapping a second light pattern as a second partial light distribution in front of the illumination system 10;
The first and second partial light distributions 150, 250 can be varied according to at least three parameters (AMP, LSVP, OFFSET) that can be set on each of the microscanners 120 and 220,
The variable first and second partial light distributions 150 , 250 create one common variable light distribution 300 in front of the lighting system 10 and at least partially overlap each other, and The light distribution 300 has an open angle, and
The first and second microscanners 120 and 220 are rotatably mounted about axes X1 and X2 that are respectively parallel to each other, and the first and second microscanners 120 and 220 are at zero positions, respectively. It can vibrate about the axes (X1, X2) with a determinable vibration amplitude (AMP) centered on , and the vibration amplitude (AMP) is limited through the maximum value (MEMSmax), and the vibration amplitude (AMP) is the determine the horizontal width of the partial light distribution 150 , 250 , and
The first and second microscanners 120 and 220 are disposed along an imaginary line, and the zero position of the first microscanner 120 is by a first angle ALPHA, and the zero position of the second microscanner 220 is is disposed inclined with respect to the imaginary line by a second angle ALPHA', the first and second angles ALPHA, ALPHA' are opposite to each other, and
The first and second partial light distributions 150 , 250 each have one light center characterized by their respective luminous intensity being maximal, the light center being on the respective microscanners 120 , 220 , respectively. displaced corresponding to a determinable optical center displacement (LSPV), and
The partial light distributions 150 and 250 may be displaced by an offset value OFFSET that may be supplied to the respective microscanners 120 and 220, respectively, and
the lighting system
- a control device (400) configured to actuate the first and second microscanners (120, 220), wherein the oscillating behavior of the first and second microscanners (120, 220) is, at a minimum, the control device (400) The control device 400, which can be controlled via parameters of oscillation amplitude (AMP), optical center displacement (LSVP) and offset value (OFFSET), which can be varied via
In the automotive lighting system,
The control device 400 is configured to receive a time-varying input variable DOA, the input variable representing a target opening angle of the overall light distribution 300 and a reference of the input variable DOA, ie DOA Determine the parameters of the vibration amplitude (AMP), the optical center displacement (LSVP) and the offset value (OFFSET) of the first and second microscanners 120 and 220 according to the test result of ≤ (MEMSmax - ALPHA), The maximum vibration amplitude MEMSmax represents the maximum angle about each axis X1, X2, and when the criterion is met the parameters of the first microscanner 120 are determined as follows,
AMP = DOA,
OFFSET = ALPHA,
LSPV = 0°,
The parameters of the second microscanner are determined as follows,
AMP = DOA,
OFFSET = -ALPHA,
LSPV = 0°,
and when the criteria are not met, the parameters of the first microscanner are determined as follows,
AMP = (DOA + MEMSmax - ALPHA)/2,
OFFSET = MEMSmax - AMP,
LSPV = DOA - AMP,
The parameters of the second microscanner are determined as follows.
AMP = (DOA + MEMSmax - ALPHA)/2,
OFFSET = -(MEMSmax - AMP),
LSPV = -(DOA - AMP),
Automotive lighting system, characterized in that. The lighting system according to claim 1, characterized in that the laser light sources (110, 210) are dimmable. The lighting system according to claim 1 or 2, wherein the first angle (ALPHA) measured from the imaginary line is 2° and the second angle (ALPHA') is -2°. 4. Lighting system according to any one of the preceding claims, characterized in that the microscanners (120, 220) are formed as quasi-static microscanners. The lighting system according to any one of claims 1 to 4, characterized in that the maximum value (MEMSmax) of the vibration amplitudes of the microscanners (120, 220) is 6°. 6. A lighting system according to any one of the preceding claims, characterized in that the control device (400) operates the laser light sources (110, 210). A motor vehicle comprising at least one lighting system ( 10 ) according to claim 1 . 8. The method according to claim 7, characterized in that the time-varying target opening angle (DOA) of the entire light distribution varies with the speed of the vehicle, and the target opening angle (DOA) decreases as the speed of the vehicle increases. automobile.

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