EP2742280B1 - Led light-source module for a vehicle headlight - Google Patents

Description

The invention relates to an LED light source module for an LED motor vehicle headlight, in particular for an LED motor vehicle headlight for generating a dynamic light distribution, wherein the LED light source module comprises two or more LED light sources, wherein an LED light source respectively from at least one light emitting diode, and wherein the light-emitting diodes of each LED light source couple light into an associated primary optic element, wherein the coupled-in light exits at least partially from a light exit surface of the primary optic element.

The invention further relates to a headlamp with such an LED light source module and a corresponding headlamp system.

In motor vehicle construction, light-emitting diodes are increasingly being used for the realization of main headlamp functions, such as e.g. for generating low beam and / or high beam but also of other light functions, such as motorway light, bad weather and daytime running lights.

Furthermore, headlight LED light sources are also particularly well suited for special applications, such as object lighting, where only certain LED light sources are visible or emit light, while the remaining LED light sources emit no light. In object lighting, for example, objects on the roadside, such as pedestrians, but also traffic signs, with light, e.g. with infrared light, illuminated, and these objects can then be captured with an infrared camera. Of course, visible light, such as traffic sign lighting can be used.

Conversely, it may of course also be possible to hide from a light distribution, such as a high beam distribution in the occurrence of oncoming traffic exactly those areas of light distribution, which would lead to dazzling oncoming traffic, hide, so that no glare occurs.

The above tasks can be realized by selective activation or in the latter case by selectively deactivating certain LED light sources.

For the selection of certain LED light sources, there are currently electronic solutions in which only certain LED light sources are activated or deactivated, so that only the desired LED light sources emit light on the street. This solution offers a high degree of flexibility, as basically any LED light sources are activated.

Other solutions show apertures, which can be brought to Lichtabschattung certain LED light sources in a corresponding position.

From the Austrian registration AT 508604 the applicant is a headlamp with the aforementioned LED light source modules known, with which a dynamic light distribution can be generated, which can be adapted to different traffic situations, etc. while driving.

In particular, such a headlamp can be realized with conventionally available LED light sources.

With such a headlamp, individual light functions, such as low beam, high beam, cornering light, etc., can be realized without moving parts by means of static lighting technology, in that the luminous area is divided into segments which can be switched separately. The light originating from the LEDs is projected onto the roadway as a segmented light distribution via the individual primary optics, which form the individual segments of the light exit surfaces, and the associated secondary optics.

Due to this segmentation, inhomogeneities in the light distribution, in particular in the apron area, such as fraying, for example, form striations or spots which have a disturbing effect on the ground / the roadway in the projection. WO 2007/027474 A2 discloses a generic LED light source module for an LED power headlamp.

It is an object of the invention to reduce or completely eliminate unwanted effects in the light image, in particular in the projection of the light image on the road / the ground.

This object is achieved with an LED light source module mentioned in the introduction in that according to the invention the light exit surfaces of the primary optic elements of an LED light source module are interconnected by means of a translucent material such that light coupled into the primary optic elements can enter the translucent material and exit from it via a light exit surface of the translucent material.

Through the connection of the individual primary optics elements, whose light exit surfaces indeed produce the segments in the light image, with a light-transmissive material, it is achieved that the inhomogeneities in the light image as a result of the banding blurred into each other, so that the disturbing effects are reduced or completely eliminated in the photograph.

In a specific variant of the invention, it is provided that the light exit surfaces of the primary optic elements lie in a common area, and that the light exit surface of the translucent material also lies in the common area of the light exit surfaces of the primary optic elements.

This common surface is formed either as a plane or curved according to the field curvature of the secondary optics.

A part of the light entering a primary optic element is no longer emitted via the light exit surface of the primary optic element itself, but enters the light-transmissive material and exits via its light exit surface. As a result, a part of the light which enters the primary optics element mixes and reduces or eliminates the inhomogeneities in the light image. The light emerging from the translucent material thus contributes to the distribution of light.

To be particularly favorable in order to reduce / eliminate the inhomogeneities, it has been found that the light exit surfaces of the primary optic elements are connected to one another in an upper and / or lower region.

Preferably, the primary optic elements are in any case connected to one another in the upper region. The terms "top" and "bottom" refer to the state of the module / headlamp installed in the vehicle.

This upper area is imaged via the secondary optics in the light image below the cut-off line, where the unwanted inhomogeneities occur first or most.

The compound in the lower region is of less importance optically and has advantages, especially in mechanical terms, in order to increase the stability of the entire element formed by the individual primary optic elements.

In a specific variant of an LED light source module, it is provided that at least one substantially horizontally extending connecting web, which is formed from the translucent material, is provided, which connects the primary optics elements in the upper and / or lower region of their light exit surfaces.

In particular, exactly two substantially horizontally extending connecting webs, which are formed from the translucent material, are provided which connect the primary optics elements in the upper and lower regions of their light exit surfaces, the upper web being of optical and mechanical importance on the one hand. while the lower bridge is mainly of mechanical importance.

Preferably, the at least one connecting web is formed integrally with the light exit surfaces of the primary optic elements or with the primary optic elements, i. the individual primary optic elements and the connecting bridge or links form a single element, the so-called primary optic.

Regardless of whether or not the webs and primary optic elements are integrally connected to one another, it is advantageous if the light exit surfaces of the primary optic elements and those of the at least one connecting web form a common light exit surface, i. that they lie in a common plane and preferably also without interruption, i. without a gap, etc., are interconnected.

In order to achieve optimum optical effects, it is provided that the at least one connecting web extends in the vertical direction upwards / downwards in each case over a certain, defined height beyond the light exit surfaces of the primary optics elements.

In the above sense, it is also when the at least one connecting web in the horizontal direction, extends laterally over a certain length beyond the light exit surfaces of the primary optics addition.

Furthermore, it is expedient if the at least one connecting web extends in the horizontal direction to the rear in the direction of the light sources and is connected to the primary optics over a certain extent.

The design of the one or more connecting webs, in particular the extension of the / the connecting web (s) to the rear has on the one hand effects on the homogeneity of the light image, which on the other hand with a reduction of the maximum in the light distribution, ie, the more homogeneous the light image is selected more strongly the maximum is reduced.

Depending on the desired effects, it is therefore provided that the extension of the at least one connecting web downwards / upwards and / or the outward extension of the at least one connecting web laterally beyond the light exit surfaces of the primary optics and / or the extension of the at least one connecting web in the horizontal direction to the rear, in particular, the extension, via which the at least one connecting web is connected to the primary optical elements, is / are selected such that the desired degree with respect to the homogeneity of the photoimage and the desired degree of reduction of the maximum in the light distribution result.

In a headlight, as described below, several LED light source modules are used. Basically, it is provided that they have, as far as possible, an identical structure, in particular also that they have identical primary optic elements or primary optics (= primary optics connected to one or two webs). In principle, however, it can also be provided for optical reasons that the modules, in particular the primary optics, and in particular the design of the at least one connecting webs, differ from one another, so that an optimal adaptation of the desired photograph can take place.

Light from the LEDs propagates in the primary optic elements as a result of total internal reflection. So that a sufficient amount of light in the translucent areas, ie in the or the connecting webs can occur, it is therefore advantageous, as described above, if they are connected with the primary optics over a certain extent - in the sense of contacting one another, preferably being connected to one another, in particular in one piece.

It can also be optically favorable if the at least one, in particular the upper, connecting web in the direction of the light coupling points of the primary optic elements is designed to be, for example, wedge-shaped, tapered.

The wedge shape can save material, which leads to a cost reduction. This applies in particular, the farther the connecting bridge extends to the rear. A cuboid, that is, not tapered configuration of the connecting web brings in optical terms no advantages over the tapered shape, so that the latter is chosen with advantage.

In particular, it may be favorable if the primary optic elements expand from their light coupling points to the light exit surfaces, with the primary optic elements expanding more towards the bottom than towards the top.

The primary optic elements have e.g. a wedge-shaped shape, wherein the element rises more towards the bottom.

In principle, relatively arbitrary shapes can be used for the light exit surfaces of the primary optic elements. As low it has been found when the light exit surfaces of the primary optic elements are rectangular. Corresponding primary optics are easy to produce and have good optical properties with regard to the superposition of the light distribution segments generated by the primary optics via the secondary optics. With such light exit surfaces can also be generated over the entire height of the light distribution in the horizontal direction, a homogeneous light distribution without gaps in the photograph

For most applications, it is sufficient if all the light exit surfaces have an identical shape. This has the advantage of simply calculating and manufacturing the headlamp and significantly reduces the cost of the headlamp.

However, it can also be provided that light exit surfaces of different shapes, e.g. be used with different widths (horizontal extent). For example, certain areas of the light distribution can be generated with narrower light exit surfaces, resulting in a finer segmentation of the light image there and smaller or narrower areas can be hidden.

Furthermore, it is favorable if the light exit surfaces of the primary optic elements are arranged parallel to one another and with identical orientation.

Due to the parallel and identical alignment can be easily generated in the vertical direction and in a simple manner a law-compliant light image.

It is particularly advantageous if the light exit surfaces of the primary optic elements of an LED light source module are arranged at a horizontal distance next to each other.

On the one hand, such an arrangement can be realized in practice without particular difficulty, on the other hand so form the light exit surfaces on the secondary optics sharply defined segments in the light image, the superposition then results in the entire light image. By switching off one or more LED light sources, it is possible to optimally hide defined areas in the light image in such an arrangement.

As already mentioned above, each LED light source module is associated with secondary optics, which image the light segments generated by the light exit surfaces of the primary optics elements-in the vehicle-mounted state of the headlight-in a region located in front of the vehicle.

The inventive arrangement of the LED light sources in two or more LED light source modules, a homogeneous light distribution, such as a high beam distribution can be generated by corresponding horizontal juxtaposition and / or superposition of the individual light segments, from which light distribution by switching off one or more LED Light sources very specific areas of light distribution "hidden", ie can not be illuminated, for example, to avoid dazzling oncoming traffic.

For example, the individual light segments can be arranged directly adjacent to one another in the horizontal direction. In order to avoid too abrupt transitions or to see edges in the light distribution, one or more other light segments can additionally be superimposed in such regions of abutting light segments. This also has the advantage that, as discussed later in detail, by fading out e.g. two light segments areas of the light distribution can be "hidden" or not illuminated, which are narrower than a light segment.

In a concrete form, the light exit surfaces are vertically standing, of greater height than width, e.g. in the form of rectangles or ellipses etc.

By this standing shape with greater height and smaller width is illuminated with a light exit surface, a narrow angle range in the horizontal direction, in vertical terms, the entire area for this horizontal angle range can be illuminated with this one light exit surface.

It is particularly advantageous if adjacent light exit surfaces of the primary optics elements of an LED light source module have a normal distance from each other, which corresponds to the width of a light exit surface, and preferably a first overall arrangement of the light exit surfaces occupies a first defined position with respect to the optical axis of their secondary optics , and wherein a second / third / fourth-nth overall arrangement with respect to the optical axis of its secondary optics by half / single / double / quadruple / ((n-1) / 2) compared to the first overall arrangement times the normal distance between two adjacent light exit surfaces of an LED light source module is shifted.

This results in an arrangement in which - apart from the horizontal edge regions - by hiding 2 light sources of the entire headlight, a sharp area, which corresponds to half the width of a light exit surface, can be hidden.

In a concrete proven embodiment of the invention, in three or more primary optic elements, the distances between light exit surfaces of adjacent primary optic elements The same and preferably all distances between the light exit surfaces of adjacent LED light sources over the entire headlight are identical.

This results in a simple structure with identical modules, with which a homogeneous light distribution can be achieved.

An inventive LED motor vehicle headlight for generating a dynamic light distribution comprises two or more LED light source modules as described above, wherein each of the LED light source modules is associated with a secondary optics, which generated by the light exit surfaces of the primary optics elements light segments - im in a Vehicle installed state of the headlamp - in an area lying in front of the vehicle maps.

Furthermore, it is expedient for the secondary optics elements of the LED light source modules and the arrangement of the light exit surfaces of the primary optics elements to be matched to one another in such a way that the light segments from the individual LED light source modules are offset from one another in the horizontal direction, and the individual LED Light sources are controlled separately.

In terms of a simple low-cost construction of the headlamp, it is when the individual LED light source modules have identical Sekundäroptikelemente.

Preferably, all distances between light exit surfaces of adjacent LED light sources over the entire headlight are identical, resulting in a simple structure with identical modules, with which a basically homogeneous possible light distribution can be achieved.

It should be briefly mentioned here that "homogeneous" does not mean that the light image is the same everywhere over the illuminated area, but that the transitions between areas of different brightness are continuous in the light image and no sharp transitions occur. The overall light image should not be "spotty" but have smooth transitions from lighter to darker areas.

By the present invention, the photograph can be further improved significantly.

Specifically, it is further provided that the overall arrangement of the light exit surfaces of an LED light source module with respect to the optical axis of Sekundäroptikelementes occupies a defined position in the horizontal direction, and wherein the different overall arrangements of the individual LED light source modules from each other different defined position in have horizontal direction with respect to the optical axis of their respective associated Sekundäroptikelementes.

It can be provided that the light exit surfaces of all LED light source modules of the headlamp are each arranged on one side of a vertical plane through the optical axis of their respective associated secondary optics.

In addition, it can be provided that exactly one light exit surface of all light exit surfaces of a headlight intersects the optical axis of the secondary optics associated therewith.

In this case, it is provided that an LED light source comprises at least two LEDs arranged horizontally one above the other, which light emitting diodes are independently controllable, and wherein each of the at least two light emitting diodes on the light exit surface of the primary optics as horizontal light segments - within the vertical light segment imaged by the primary optics - imaged become.

Preferably, each LED of an LED light source can be controlled separately.

In a vehicle headlamp system according to the invention with two headlamps it is provided that in a vehicle mounted state left headlights on the road the left part of the light distribution and the right headlights generates the right part of the light distribution, and wherein at least each LED light source, preferably each LED of the two headlights can be controlled separately.

• Fig. 1 einen erfindungsgemäßen Schweinwerfer mit vier LED-Lichtquellenmodulen,
• Fig. 2 ein einzelnes LED-Lichtquellenmodul,
• Fig. 3 eine Explosionsdarstellung des Moduls aus Fig. 2,
• Fig. 4 eine isometrische Ansicht einer ersten erfindungsgemäßen Primäroptik von vorne,
• Fig. 5 eine isometrische Ansicht der Primäroptik von hinten,
• Fig. 6 einen vertikalen Schnitt durch die Primäroptik entlang der strich-punktierten Ebene aus Figur 4,
• Fig. 7 die Primäroptik aus Figur 4 in einer Ansicht von oben,
• Fig. 8 einen vertikalen Schnitt durch eine zweite Variante einer Primäroptik,
• Fig. 9 eine Ansicht der Primäroptik aus Figur 8 von oben,
• Fig. 10 eine Isolux-Verteilung an der Auskoppelfläche/Lichtaustrittsfläche bei einer Primäroptik beim Stand der Technik (nicht verbundene Optiken),
• Fig. 11 eine Isolux-Verteilung an der Auskoppelfläche/Lichtaustrittsfläche gemäß der ersten Ausführungsform der Primäroptik,
• Fig. 12 eine Isolux-Verteilung an der Auskoppelfläche/Lichtaustrittsfläche gemäß der zweiten Ausführungsform,
• Fig. 13 eine Lichtverteilung, erzeugt unter Verwendung von Primäroptiken aus dem Stand der Technik,
• Fig. 14 eine Lichtverteilung, erzeugt unter Verwendung von Vorsatzoptiken gemäß der 1. Ausführungsform, und
• Fig. 15 eine Lichtverteilung, erzeugt unter Verwendung von Vorsatzoptiken gemäß der 1. Ausführungsform.

In the following the invention is explained in more detail with reference to the drawing. In this shows

• Fig. 1 a pig launcher according to the invention with four LED light source modules,
• Fig. 2 a single LED light source module,
• Fig. 3 an exploded view of the module Fig. 2 .
• Fig. 4 an isometric view of a first primary optics according to the invention from the front,
• Fig. 5 an isometric view of the primary optic from behind,
• Fig. 6 a vertical section through the primary optics along the dash-dotted plane FIG. 4 .
• Fig. 7 the primary optic FIG. 4 in a view from above,
• Fig. 8 a vertical section through a second variant of a primary optic,
• Fig. 9 a view of the primary optics FIG. 8 from above,
• Fig. 10 an isolux distribution at the decoupling surface / light exit surface in a primary optics in the prior art (non-connected optics),
• Fig. 11 an isolux distribution at the decoupling surface / light exit surface according to the first embodiment of the primary optics,
• Fig. 12 an isolux distribution at the decoupling surface / light exit surface according to the second embodiment,
• Fig. 13 a light distribution generated using prior art primary optics,
• Fig. 14 a light distribution generated using attachment optics according to the first embodiment, and
• Fig. 15 a light distribution generated using attachment optics according to the first embodiment.

FIG. 1 shows a headlight SW with four LED light source module M1 - M4, for example, an LED motor vehicle headlight SW, such as an LED motor vehicle headlight for generating a dynamic light distribution. Each of these LED light source modules M1-M4 is assigned a secondary optics element S1-S4, for example in the form of a lens, which projects the light emerging from the assigned module onto the roadway.

An LED light source module M is in FIG. 2 and FIG. 3 shown in detail and has two or more, in the example shown four LED light sources LEQ on.

An LED light source LEQ, in turn, consists of at least one light-emitting diode, in the example shown, two light-emitting diodes LED1, LED2. The light-emitting diodes LED1, LED2 of each LED light source LEQ are each assigned a primary optics element P1-P4, into which this light is coupled. The coupled-in light emerges at least partially from the light exit surface L1-L4 of the primary optic element P1-P4.

The primary optic elements P1-P4 are interconnected by means of two webs VS1, VS2, as will be discussed in detail below, and form a common component, a so-called primary optics PG.

The LED light sources LEQ are arranged on a LED-Print PRI.

The primary optics PG is fastened with a holder HAL on the LED print PRI, furthermore a positioning element POS is provided for positioning the primary optics PG with respect to the LED print.

As already mentioned, the light exit surfaces L1-L4 of the primary optics elements P1-P4 of an LED light source module M are connected to one another by means of a transparent material so that the light coupled into the primary optics elements P1-P4 enters the light-transmissive material and via their light exit surface (s) LF1 , LF2 can escape from this again.

In a specific variant of an LED light source module is provided that two substantially horizontally extending connecting webs VS1, VS2, which from the translucent Material is formed, are present, which connects the Primärroptikelemente P1 - P4 in the upper and lower regions of their light exit surfaces L1 - L4 together.

By the connection of the individual primary optics elements, whose light exit surfaces indeed produce the segments in the light image, with the translucent webs, it is achieved that the inhomogeneities in the photo as a result of banding blurred into each other, so that the disturbing effects are reduced or completely eliminated in the photograph.

The light exit surfaces L1 - L4 of the primary optics elements P1 - P4 and the light exit surfaces LF1, LF2 of the webs VS1, VS2 lie in a common area.

This common surface is either formed as shown as a plane or curved in accordance with the field curvature of Sekundäroptikelemente.

A part of the light entering a primary optic element is no longer emitted via the light exit surface of the primary optic element itself, but enters the light-transmissive material and exits via its light exit surface. As a result, a part of the light which enters the primary optics element mixes and reduces or eliminates the inhomogeneities in the light image. The light emerging from the translucent material thus contributes to the distribution of light.

In any case, the primary optic elements are preferably connected to one another in the upper region. The terms "top" and "bottom" refer to the state of the module / headlamp installed in the vehicle.

This upper area is imaged via the secondary optics in the light image below the cut-off line, where the unwanted inhomogeneities most disturb.

In this area, they are disturbing because the Lichtverteilungsinhomogenitäten in this area are visible on the street. The fact that the inhomogeneity effect occurs mainly on the upper side of the primary optics is due to the fact that often the light emitting diodes feed in asymmetrically and the light guide opens further downwards than upwards.

Unilateral feed is to be understood as meaning that the light is coupled in further above and not exactly in the geometric center of the light coupling point of the primary optics elements.

The compound in the lower region is of less importance optically and has advantages, especially in mechanical terms, in order to increase the stability of the entire element formed by the individual primary optic elements.

Accordingly, the upper web VS1 on the one hand in terms of optical as well as in mechanical terms of importance, while the lower web VS2 mainly from a mechanical point of importance.

Preferably, the connecting webs VS1, VS2 are formed integrally with the light exit surfaces L1 - L4 of the primary optic elements P1 - P4 and with the primary optic elements P1 - P4, respectively. the individual primary optic elements and the connecting bridge or links form a single element, the so-called primary optic PG.

The light exit surfaces L1 - L4 of the primary optic elements P1 - P4 and those of the connecting webs VS1, VS2 form a common light exit surface, i. they form a continuous, approximately flat surface as shown.

As FIG. 4 shows, in a specific embodiment of the primary optics PG, the light exit surfaces L1 - L4 of the primary optics P1 - P4 standing in the vertical direction, preferably with a greater height h than width b, formed, for example in the form of rectangles or ellipses etc.

By this standing shape with greater height and smaller width is illuminated with a light exit surface, a narrow angle range in the horizontal direction, in vertical terms, the entire area for this horizontal angle range can be illuminated with this one light exit surface.

Adjacent light exit surfaces L1 - L4 of the primary optics elements P1 - P4 of an LED light source module M have a normal distance A from one another which, for example, corresponds to the width b of a light exit surface L1-L4. In a concrete proven Embodiment of the invention are in three or more primary optics P1 - P4 the distances A between light exit surfaces L1 - L4 adjacent primary optics P1 - P4 same and it is preferably all distances between the light exit surfaces of adjacent LED light sources over the entire headlight identical. This results in a simple structure with identical modules, with which a homogeneous light distribution can be achieved.

The exact arrangement of the individual LED light source modules and the operation is in the application AT 508604 the applicant described and should not be further elaborated here.

In order to achieve optimum optical effects, it is provided that the connecting webs VS1, VS2 in the vertical direction upwards (upper web VS1) and downwards (web VS2) in each case over a certain, defined height h1, h2 via the light exit surfaces L1 - L4 of the primary optic elements P1 - P4 extend ( FIG. 4 ).

Likewise, the connecting webs VS1, VS2 extend in a horizontal direction laterally over a certain length 11, 12 beyond the light exit surfaces L1-L4 of the primary optics P1-P4.

Preferably, h1 = h2.

In particular, the extent 11 in the upper region must be sufficiently selected so that there are no inhomogeneities in the superimposition of the light images of the individual light modules.

To complete is still on FIG. 5 which shows in particular the light coupling points or areas LK1 - LK4. These light coupling points may be flat as shown, but may also have a convex and / or concave, that is a light collecting and / or scattering structure.

FIG. 6 shows a vertical section along the in FIG. 4 dot-dash line through a primary optic PG. As can be seen, the upper connecting web VS1 extends in horizontal direction to the rear to the light sources or LEDs LED1, LED2 out over a certain extent ES.

The design of the one or more connecting webs, in particular the extension of the / the connecting web (s) to the rear has on the one hand effects on the homogeneity of the light image, which on the other hand with a reduction of the maximum in the light distribution, ie, the more homogeneous the light image is selected more strongly the maximum is reduced.

Depending on the desired effects, it is therefore provided that the extent of the at least one connecting web (VS1, VS2) downwards / upwards and / or the outward extension of the at least one connecting web (VS1, VS2) laterally beyond the light exit surfaces (L1 - L4) of the primary optics and / or the extension of the at least one connecting web (VS1, VS2) in the horizontal direction to the rear, in particular the extension (ES), via which the at least one connecting web (VS1, VS2) is connected to the primary optics elements (P1 - P4), in such a way is / are that the desired degree with respect to the homogeneity of the light image and the desired degree of reduction of the maximum in the light distribution result.

In a headlight, as described below, several LED light source modules are used. Basically, it is provided that they have, as far as possible, an identical structure, in particular also that they have identical primary optic elements or primary optics (= primary optics connected to one or two webs). In principle, however, it can also be provided for optical reasons that the modules, in particular the primary optics, and in particular the design of the at least one connecting webs, differ from one another, so that an optimal adaptation of the desired photograph can take place.

The web VS2 has a similar / identical extent, but this primarily from mechanical and / or manufacturing aspects, which is why the optical implications are explained with reference to the upper web VS1.

Light from the LEDs LED1, LED2 propagates in the primary optic elements (here: element P3) as a result of total reflection. So that a sufficient amount of light in the translucent Areas, ie, in the or the connecting webs can occur, it is therefore favorable as described above, if they are connected over a certain extent with the primary optics - in the sense of contact with each other, preferably interconnected, in particular in one piece - are.

If the connecting web extended rearward over a smaller extent-see the dashed line VS1 ', then the light beams LS1, LS2 could not enter the web VS1 and exit via its light exit surface LF1, but would be reflected (LS1', LS2 '). ) and exit via the light exit surface L3 of the primary optic element P3 (undesirably).

Likewise one recognizes in FIG. 7 in a view from above, as by the presence of the web VS1 the light beams (thick, solid) are diverted in the horizontal direction, while without web VS1 the light beams (thin, dashed lines) would be deflected in the primary optics element P3 converging in front of the light exit surface. This results in a mixing of light from different light sources / primary optic elements and thus to a blurring of the otherwise resulting inhomogeneities.

It should be noted that the explanations are based on the FIGS. 6 and 7 just a rough description for a basic understanding. In fact, the occurring effects are seen in combination, ie it is a three-dimensional effect.

FIG. 8 shows a variant in which the web VS1 extends over a still larger area ES to the rear, in addition, the upper connecting web VS1 is tapered in the direction of the Lichteinkoppelstellen the Primäräptikelemente out.

The connecting web or its extent ES backwards reduces the maximum of the illuminance. Therefore, extension the backward extension ES represents a compromise between maximum and homogeneity. The more homogeneous the light distribution should be, the greater are the losses at the maximum (Hmax) of the light distribution.

The homogenization effects achieved by the connecting web thus depend on the extent of the extent ES to the rear. The tapered shape has no visual impact, but saves material. From a purely optical point of view but would also be a cuboid shape of the connecting web possible.

Correspondingly, light rays may enter the web VS1 even earlier, i. it gets even more light in the connecting web VS1 and exits from the light exit surface LF1 again.

As FIG. 9 shows here also more light in the areas "between" the primary optic elements.

FIG. 10 now shows the entire light exit surface of the primary optics PG without connecting webs (as in the application AT 508604 ) FIG. 11 shows the light exit surface of a primary optic element PG Figure 4-7 , and FIG. 12 a primary optic PG after FIGS. 8 and 9 ,

Shown are illuminance ranges, i. Areas of different brightness (pure quality, brightness = luminous flux / intensity emerging from the area), Hmax denotes a region of maximum brightness, H0 dark areas, H1 is a region of low brightness, H2 is a region of (slightly) more brightness and H3 an even brighter area.

The light emerging from these light exit surfaces is projected onto the carriageway via the secondary optics elements.

The inhomogeneity effect therefore occur mainly on the upper side of the primary optics, since often as in the present variant, the light emitting diodes feed asymmetrically and the light guide opens further down than upwards. In this context, asymmetrical feeding means that the light is coupled in at the top and not exactly in the geometric center of the light coupling point of the primary optics elements. Accordingly, as in the Figures 10 - 12 shown that the Hmax area is located in the upper area on the decoupling surface and not in the center.

In the variant after FIG. 10 , which represents the state of the art, there are no connecting webs. Due to the secondary optics (projection lens), the occurring light distribution at the decoupling surface of the primary optics is reproduced exactly. In the illustrated primary optics so exactly 4 light fingers (4 segments) are generated and filled the spaces with the light fingers of another module. At the edges below (and also above) there are strong inhomogeneities in the overlay, which leads to fraying of the light image.

In the variant after FIG. 11 with connecting bridge arise opposite FIG. 10 already improvements, the H1 areas of adjacent segments approach each other in the upper area in the web VS1 without touching, and there are still inhomogeneities in the photograph.

In the variant after FIG. 12 the upper / lower area between primary optic elements P1 - P4 is illuminated even more strongly than in the variant in FIG FIG. 11 ,

The H1 areas almost touch each other. The overlapping of the gaps with the light fingers of another module results in a homogeneous light distribution. H1 areas of adjacent light modules overlap almost completely.

FIG. 13 shows a light distribution with LED light source modules with primary optics according to the prior art ( FIG. 10 ) FIG. 14 a light distribution with LED light source modules with primary optics accordingly FIG. 11 , and FIG. 15 a light distribution with LED light source modules with primary optics accordingly FIG. 12 ,

The light distribution shown is a low beam distribution, but the effects also occur in other light distribution, such as in a high beam distribution. As can be seen in these schematic figures, a strong inhomogeneity STE1 occurs in the light image LVE1 in advance (FIG. FIG. 13 ), this inhomogeneity STE2 is already considerably smaller in the light image LVE2, and in the light image LVE3 (FIG. FIG. 15 ) is almost no inhomogeneity formed.

Claims (25)

1. An LED light source module (M, M1-M4) for an LED motor vehicle headlight (SW), in particular for an LED motor vehicle headlight (SW) for producing a dynamic light distribution, wherein the LED light source module (M) comprises two or more LED light sources (LEQ),
   wherein an LED light source (LEQ) in each case comprises at least one light-emitting diode (LED1, LED2),
   and wherein the light-emitting diodes (LED1, LED2) of each LED light source (LEQ) couple light into an associated primary optical element (P1-P4), wherein the coupled-in light exits again, at least partially, from a light exit surface (L1-L4) of the primary optical element (P1-P4),
   characterised in that the light exit surfaces (L1-L4) of the primary optical elements (P1-P4) of an LED light source module (M; M1, M2, M3, M4) are arranged adjacently with horizontal spacing (A) and
   at least one substantially horizontally extending connecting web (VS1, VS2) made of the light-permeable material is provided and interconnects the primary optical elements (P1-P4) in an upper and/or lower region of the light exit surfaces (L1-L4) thereof,
   such that light coupled into the primary optical elements (P1-P4) can enter the light-permeable material of the at least one connecting web (VS1, VS2) and exit therefrom again through a light exit surface (LF1, LF2) of the at least one connecting web (VS1, VS2).
2. The LED light source module according to Claim 1, characterised in that the light exit surfaces (L1-L4) of the primary optical elements (P1-P4) lie in a common surface, and in that the light exit surface (LF1, LF2) of the light-permeable material also lies in the common surface of the light exit surfaces of the primary optical elements.
3. The LED light source module according to Claim 1 or 2, characterised in that the light exit surfaces (L1-L4) of the primary optical elements (P1-P4) are interconnected in an upper and/or lower region.
4. The LED light source module according to one of Claims 1 to 3, characterised in that two substantially horizontally extending connecting webs (VS1, VS2) made of the light-permeable material are provided and interconnect the primary optical elements (P1-P4) in the upper and lower region of the light exit surfaces (L1-L4) thereof.
5. The LED light source module according to one of Claims 1 to 4, characterised in that the at least one connecting web (VS1, VS2) is formed in one piece with the light exit surfaces (L1-L4) of the primary optical elements (P1-P4) or with the primary optical elements (P1-P4).
6. The LED light source module according to one of Claims 1 to 5, characterised in that the light exit surfaces (L1-L4) of the primary optical elements (P1-P4) and those of the at least one connecting web (VS1, VS2) form a common light exit surface.
7. The LED light source module according to one of Claims 1 to 6, characterised in that the at least one connecting web (VS1, VS2) extends upwardly/downwardly in the vertical direction beyond the light exit surfaces (L1-L4) of the primary optical elements (P1-P4) by a certain height (h1, h2).
8. The LED light source module according to one of Claims 1 to 7, characterised in that the at least one connecting web (VS1, VS2) extends in the horizontal direction, laterally beyond the light exit surfaces (L1-L4) of the primary optical elements (P1-P4) by a certain length (11, 12).
9. The LED light source module according to one of Claims 1 to 8, characterised in that the at least one connecting web (VS1, VS2) extends in the horizontal direction toward the rear in the direction of the light sources (LEQ) and is connected to the primary optical elements (P1-P4) over a certain extension (ES), wherein the at least one, in particular the upper connecting web (VS1) preferably tapers, for example in a wedge-shaped manner, in the direction of the light coupling points (LK1-LK4) of the primary optical elements (P1-P4).
10. The LED light source module according to one of Claims 1 to 9, characterised in that the primary optical elements (P1-P4) expand from the light coupling points (LK1-LK4) thereof toward the light exit surfaces (L1-L4), wherein the primary optical elements (P1-P4) expand to a greater extent in the downward extension thereof than in the upward extension thereof.
11. The LED light source module according to one of Claims 1 to 10, characterised in that the light exit surfaces (L1-L4) of the primary optical elements (P1-P4) are rectangular and/or the light exit surfaces (L1-L4), oriented upright in the vertical direction, have a greater height (h) than width (b).
12. The LED light source module according to one of Claims 1 to 11, characterised in that all light exit surfaces (L1-L4)are formed the light exit surfaces (L1-L4) have an identical shape.
13. The LED light source module according to one of Claims 1 to 12, characterised in that the light exit surfaces (L1-L4) of the primary optical elements (P1-P4) are arranged parallel to one another and with identical orientation.
14. The LED light source module according to one of Claims 1 to 13, characterised in that a secondary optical unit (S1, S2, S3, S4) is associated with the LED light source module (M; M1, M2, M3, M4), and, when the headlight (SW) is installed in a vehicle, images the light segments produced by the light exit surfaces (L1-L4) of the primary optical elements (P1-P4) in a region located in front of the vehicle.
15. The LED light source module according to one of Claims 1 to 14, characterised in that adjacent light exit surfaces (L1-L4) of the primary optical element (P1-P4) of an LED light source module (M; M1, M2, M3, M4) have a normal spacing (A) from one another, which corresponds to the width (B) of a light exit surface (L1-L4).
16. The LED light source module according to one of Claims 1 to 15, characterised in that, in the case of three or more primary optical elements (P1-P4), the spacings (A) between light exit surfaces (L1-L4) of adjacent primary optical elements (P1-P4) are identical.
17. The LED light source module according to one of Claims 1 to 16, characterised in that the extension of the at least one connecting web (VS1, VS2) downwardly/upwardly and/or the extension of the at least one connecting web (VS1, VS2) laterally beyond the light exit surfaces (L1-L4) of the primary optical elements and/or the extension of the at least one connecting web (VS1, VS2) in the horizontal direction toward the rear, in particular the extension (ES) over which the at least one connecting web (VS1, VS2) is connected to the primary optical elements (P1-P4), is/are selected such that the desired extent of homogeneity of the light exposure and the desired extent of the reduction of the maximum in the light distribution are achieved.
18. An LED motor vehicle headlight (SW) for producing a dynamic light distribution, comprising two or more LED light source modules (M; M1, M2, M3, M4) according to one of Claims 1 to 19, wherein a secondary optical unit (S1, S2, S3, S4) is associated with each of the LED light source modules (M; M1, M2, M3, M4) and, when the headlight (SW) is installed in a vehicle, images the light segments produced by the light exit surfaces (L1-L4) of the primary optical elements (P1-P4) in a region located in front of the vehicle, wherein the secondary optical elements (S1, S2, S3, S4) of the LED light source modules (M; M1, M2, M3, M4) and the arrangement of the light exit surfaces (L1-L4) of the primary optical elements are preferably matched to one another such that the light segments from the individual LED light source modules (M; M1, M2, M3, M4) are imaged such that said light segments are offset relative to one another in the horizontal direction, and wherein the individual LED light sources can be controlled separately.
19. The headlight according to Claim 18, characterised in that the individual LED light source modules (M; M1, M2, M3, M4) comprise identical secondary optical elements (S1, S2, S3, S4).
20. The headlight according to one of Claims 18 or 19, characterised in that all spacings (A) between light exit surfaces (L1-L4) of adjacent LED light sources are identical across the entire headlight, or in that the overall arrangement of the light exit surfaces (L1-L4) of an LED light source module (M; M1, M2, M3, M4) assumes a defined position in the horizontal direction relative to the optical axis (X) of the secondary optical element (S1, S2, S3, S4), and wherein the different overall arrangements of the individual LED light source modules (M; M1, M2, M3, M4) have defined positions, differing from one another, in the horizontal direction relative to the optical axis of the secondary optical element (S1, S2, S3, S4) associated with the respective LED light source module.
21. The headlight according to one of Claims 18 to 20, characterised in that a first overall arrangement of the light exit surfaces assumes a first defined position relative to the optical axis of the secondary optical unit thereof, and wherein a second/third/fourth ... n^th overall arrangement relative to the optical axis of the secondary optical unit thereof is shifted in comparison to the first overall arrangement by one-half/one/two/four/((n-1)/2) times the normal spacing (A) between two adjacent light exit surfaces of an LED light source module (M; M1, M2, M3, M4).
22. The headlight according to one of Claims 18 to 21, characterised in that the light exit surfaces of all LED light source modules (M; M1, M2, M3, M4) of the headlight are each arranged on one side of a vertical plane through the optical axis of the secondary optical unit (S1, S2, S3, S4) associated with the respective LED light source module.
23. The headlight according to one of Claims 18 to 22, characterised in that an LED light source (LQE) comprises at least two light-emitting diodes (LED1, LED2) arranged horizontally one above the other, said light-emitting diodes (LED1, LED2) being controllable independently of one another, and wherein each of the at least two light-emitting diodes (LED1, LED2) are imaged via the light exit surface of the primary optical element as horizontal light segments, within the vertical light segment imaged by the primary optical element.
24. The headlight according to one of Claims 18 to 23, characterised in that each light-emitting diode of an LED light source can be controlled separately.
25. A vehicle headlight system comprising two headlights (SW) according to one of Claims 18 to 24, wherein the headlight that is installed on the left in the vehicle produces the left part of the light distribution on the roadway, and the right headlight produces the right part of the light distribution, and wherein at least each LED light source, preferably each light-emitting diode of the two headlights, can be controlled separately.

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