• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Lighting device (1a) for a motor vehicle headlight, comprising a first light guide unit (2) with a holding web (2a) and at least two mutually spaced from the retaining web (2a) protruding outcoupling webs (2c), a second light guide unit (3) with a holding web (3a) and at least one outboard land (3b) projecting from the support web (3a), a plurality of light sources (4) for coupling light into the outgoer webs (2b, 3b) of the light guide units (2, 3), each outgoer land (2b, 3b) at least one light source (4) is associated, and at least one the light guide units (2, 3) downstream lens (5), preferably a projection lens, for generating a light distribution, each outgoer (2b, 3b) a light outcoupling surface (2c, 3c) Emitting light into the at least one lens (5), wherein the first and second light guide units (2, 3) are separate components from each other, d are arranged to each other that between adjacent coupling-out webs (2b) of the first light guide unit (2) each a Auskopplungssteg (3b) of the second light guide unit (3) is arranged, wherein between the lens (5) and the light outcoupling surfaces (2c, 3c) of the coupling-out webs (2b, 3b) an aperture (11) is arranged.
    公开号:AT517697A4
    申请号:T50825/2015
    申请日:2015-09-30
    公开日:2017-04-15
    发明作者:Taudt Lukas；Maier Udo
    申请人:Zkw Group Gmbh；
    IPC主号:
    专利说明:

    Lighting device for a motor vehicle headlight
    The invention relates to a lighting device for a motor vehicle headlight, comprising a first light guide unit with a holding web and at least two mutually spaced from the retaining web projecting outcoupling webs, a second light guide unit with a holding web and at least one protruding from the holding web decoupling web, a number of light sources for coupling of light in the decoupling webs of the light guide units, wherein each decoupling web at least one light source is assigned, and at least one of the light guide units downstream lens, preferably a projection lens, for generating a defined light distribution, each decoupling web has a light extraction surface for emitting light into the at least one lens, wherein the first and the second light guide unit are separate from one another, which are arranged in such a way that between adjacent coupling In each case a decoupling web of the second light guide unit is arranged in each of the first light guide unit.
    Furthermore, the invention relates to motor vehicle headlights having at least one lighting device according to the invention and a motor vehicle having at least one, preferably two lighting devices and / or
    Motor vehicle headlamps.
    Initially mentioned lighting devices are used in light modules for
    A motor vehicle headlamp for producing light distributions, for example for producing segmented light distributions, i. of light distributions made up of individual light segments. Such a light segment can be illuminated, for example, by activating a light source, which light source is associated with a decoupling ridge, wherein the light coupled into the decoupling ridge is transmitted via a downstream lens as a light segment, e.g. is imaged on a lying in front of the lighting device area, such as a roadway.
    To generate the most homogeneous possible light distribution, it is desirable to arrange the individual coupling webs as close to each other as possible. For manufacturing reasons, however, only limited narrow gaps between the coupling webs of a light guide unit can be produced economically. For this reason, it has gone over to provide two or more light guide units with coupling webs, which can be moved into each other, so that the coupling web of a light guide unit between outgoe the opposite light guide unit is taken and thus small gaps between the coupling webs can be produced economically. Such light guide units have become known, for example, from the document WO 2014/202177 A1, in which outcoupling webs-designated there as intent optics-are arranged on two mutually opposite light guide units.
    The provision of light guide units which intermesh or act together to produce a common light distribution has the disadvantage that they can be mispositioned to each other, the experience has shown that even slight misalignments of the light guide units to each other in the photograph of such a lighting device can be seen. This relates in particular to the course of the lower edge of a light distribution emitted by the illumination device, which corresponds to the course of a rectangular function in mutually offset light guide units.
    Efforts have therefore been made to minimize positioning errors of the light guide units relative to each other. These efforts have so far brought only partially satisfactory results to days, since the multi-part, partially nested structure of the lighting device tolerance dimensions of individual components can not be arbitrarily reduced without significantly complicating the assembly of the lighting device and / or the cost of producing the individual Significantly increase components.
    It is therefore an object of the invention to provide a lighting device in which the advantages of providing mutually cooperating light guide units can continue to be used and the mentioned disadvantages, in particular undesired aberrations, are avoided.
    This object is achieved with a lighting device of the type mentioned above, in that according to the invention a shutter is arranged between the lens and the light-outcoupling surfaces of the outcoupling webs, which is designed to limit the light emerging from the outcoupling webs in the direction of the lens in such a way that light distribution radiated by the illumination device is limited downwards by a single continuous rectilinear lower edge, preferably in the form of a horizontal line.
    Thanks to the invention, positioning errors of the light guide units in the vertical direction can be compensated, so that the light distribution emitted by the lighting device is limited by a single, sharp, continuous lower edge. The lower edge is located, for example, 2 ° below the horizontal line of the light distribution.
    The first and / or the second light guide unit need not be made in one piece, but may also be composed of a plurality of light guide units. The aperture is made of opaque material. The illumination device is preferably configured to generate a low beam distribution or a high beam distribution, in particular an adaptive low beam distribution or high beam distribution.
    Alternatively, it would also be conceivable to carry out the coupling-out webs separately from one another - that is to say that each light-guiding unit is only assigned one coupling-out web. The provision of holding webs could be dispensed with in such an arrangement. The aperture would show the same effect mentioned above, however, the production cost of implementing such an arrangement is disproportionately high.
    In particular, it can be provided that the diaphragm has a horizontal edge for limiting the light distribution.
    In order to achieve an all-round limitation of the light distribution, it can be provided that the aperture has an opening through which light is guided by the coupling webs into the lens, wherein in the installed state, an upper side of the opening is bounded by a horizontally extending edge.
    Preferably, the aperture can be made in one piece.
    In particular, it can be provided that the first light guide unit has a number of n protruding from the retaining web decoupling webs, wherein the second light guide unit has a number of n-1 protruding from the retaining web decoupling webs, preferably n = 3, n = 4 or n> 5 applies. In this variant of the invention, the first light guide unit always has a coupling web more than the second light guide unit. As the number of decoupling lands increases, it is possible to achieve a finer-resolution segmentation of the light distribution.
    In an alternative embodiment, the first and the second light guide unit have an equal number of coupling-out webs. In this case, the first light guide unit has a number of n protruding from the retaining web outcoupling webs, wherein the second light guide unit has a number of n protruding from the retaining web decoupling webs, preferably n = 3, n = 4 or n> 5 applies.
    In addition, it can be provided that the first and / or the second light guide unit are designed as transparent solid body. The light pipe within the solid body is made by total reflection along its walls.
    Alternatively, it can be provided that the first and / or the second light guide unit are designed as light-conducting hollow body.
    It can be particularly favorable when at least one LED light source is assigned to each outgoer. Also, each outgoer can be associated with two or more LEDs.
    In order to be able to specify the light radiated by the coupling-out webs and subsequently segmentation of the light distribution particularly accurately, it can be provided that individual, preferably all, light-sources arranged in order to produce a dynamic light distribution can be individually driven to the coupling webs.
    Another aspect of the invention relates to a motor vehicle headlight with at least one lighting device according to the invention and a motor vehicle, comprising at least one, preferably two lighting devices according to the invention and / or motor vehicle headlights.
    The invention is explained in more detail below with reference to an exemplary and non-limiting embodiment, which is illustrated in the figures. It shows
    1 shows a schematic representation of a lighting device according to the prior art and FIG. 1 a shows a detailed illustration of FIG.
    FIG. 1 a shows a detailed view of a beam path through spruce guide units according to FIG. 1,
    FIG. 2 shows a schematic illustration of a plurality of spruce segments generated by the lighting device according to FIG. 1,
    3 and 4 an exemplary arrangement of individual components of a lighting device,
    FIGS. 5 and 6 show examples of arrangements of spruce guide units,
    7 shows a sectional view of an embodiment according to the invention of a lighting device, and FIG. 7 a shows a detailed view of FIG. 7,
    8 shows a representation of the light distribution of the lighting device according to FIG. 7, FIG.
    Figure 9 is a front view of a diaphragm of the lighting device.
    In the following figures, unless otherwise stated, like reference numerals designate like features.
    Figure 1 shows a schematic representation of a lighting device 1 according to the prior art. The lighting device 1 is suitable for use in a motor vehicle headlight and has a first light guide unit 2 and a second light guide unit 3, wherein in the perspective shown the first light guide unit 2 almost completely covers the second light guide unit 3.
    The light guide units 2 and 3 are set up to introduce light, which is coupled via upstream light sources 4 into the light guide unit 2 or 3, into a downstream lens 5. The light guiding units 2 and 3 are respectively directed to the optical axis OA of the lens 5 to irradiate light into the lens 5. Due to various assembly inaccuracies and / or manufacturing tolerances, which will be discussed in more detail in the discussion of Figures 3 to 6, the light guide units 2 and 3 may be offset according to the present case in the vertical direction to each other in a manner corresponding to gradations of a lower edge of the light distribution of the light image generated by the lighting device leads. In the present case, the second light guide unit 3 has an offset upwards and the first light guide unit 2 has an offset downwards, whereby an edge beam L3 decoupled by the second light guide unit 3 has an offset to the edge beam L2 coupled out by the first light guide unit. An edge beam designates a light beam which lies in the outermost edge region of the solid angle illuminated by a light guide unit 3 and thus defines the limit of the light distribution. All directional information refers to the lighting device when assembled, unless stated otherwise. FIG. 1 a shows a detailed representation of the mutually offset light guide units 2 and 3 as well as the exemplary edge beams L2 and L3.
    Figure 2 shows the effects of the offset of the light guide units 2 and 3 to each other. The first light guide unit 2 images individual light segments 6a; the remaining light segments 6b originate from the second light guide unit 3. The offset of the two light guide units 2 and 3 relative to one another leads to a vertical offset of the lower photo edges LBK-L2 and LBK-L3 relative to each other. As a result, the light distribution emitted by the illumination device 1 has a lower edge which delimits the light distribution and which runs in a stepped manner, in particular in accordance with a rectangular function.
    For a better discussion of the causes of the offset of the individual light guide units 2 and 3 to each other, with reference to the following figures 3 and 4, an exemplary construction of a lighting device 1 will be described. FIG. 3 shows an exploded view of the lighting device 1, the light sources 4 being arranged on a carrier element 8. The carrier element 8 can be inserted into a holding device 9, which in turn is adapted to receive the light guiding units 2 and 3. The support device 9 has for this purpose depressions 9a, which are bounded by guide walls 9b, wherein the light guide units 2 and 3 can be held in the recesses 9a. In order to allow the light guide units 2 and 3, despite manufacturing tolerances, which may be due to the manufacturing process of the light guides 2 and 3 and the support device 9, to be reliably introduced into the recesses 9a, the recesses 9a are typically dimensioned slightly larger than the corresponding dimensions of Light guide units 2 and 3. Consequently, the light guide units 2 and 3 are held with a certain play within the recess 9a, which may result in uncertainties in the positioning of the light guide units 2 and 3.
    Furthermore, it can be clearly seen in FIG. 3 that the first light guide unit 2 has a holding web 2 a, from which three coupling webs 2 b protrude. The second light guide unit 3 likewise has a holding web 3a, from which two outcoupling webs 2b protrude, wherein each outcoupling web 2b or 3b is assigned two light sources 4 in the present case. Each of the segments 6a and 6b shown in Fig. 2 is generated by the light sources 4 which couple light into the respective outgoer 2b or 3b by the coupled light leaving the outgoers 2b and 3b, respectively, through respective light outcoupling surfaces 2c and 3c, respectively Downstream lens 5 (see FIG. 1) is projected onto a lying in front of the lighting device 1 area.
    FIG. 4 shows the components of FIG. 3 in an assembled state, wherein the light guide units 2 and 3 are secured against slipping out of the recess 9a by a cover 10, which is not shown in FIG.
    Figures 5 and 6 show a plan view of the light guide units 2 and 3 and their light extraction surfaces 2c and 3c, which are limited in the vertical direction by a direction indicated by a dashed line lower edge UK and an upper edge OK. The fact that the lower edge UK is located at the light extraction surfaces above the upper edge OK is due to the inversion of the light distribution by the downstream lens 5. In FIG. 5, the first and the second light guide units 2 and 3 are arranged in a desired position, so that the upper and lower edges OK and UK of the light exit surfaces 2c and 3c are aligned with one another. The vertical distances to the guide walls 9b of the support device 9 are the desired lengths al and a2. In contrast, in FIG. 6, the light guide units 2 and 3 are shifted relative to one another in accordance with the representation of FIGS. 1 to 2, the distances a 'and a2' to the side walls 9b being significantly reduced with respect to the distances a1 and a2. As a result, the upper and lower edges OK and UK, in contrast to the arrangement of FIG. 5, are no longer aligned with one another but follow a course in the form of a rectangular function, as has already been described with reference to FIG.
    Figure 7 shows a sectional view of an embodiment according to the invention of a lighting device la, which differs from lighting device according to Figures 1 to 4 and 5,6 in that between the lens 5 and the light outcoupling surfaces 2c and 3c of the coupling webs 2b, 3b, a diaphragm 11 is arranged , The diaphragm 11 is configured to limit the light coupled into the lens 5 by the coupling-out webs 2b, 3b in such a way that the light distribution emitted by the lighting device 1a-that is, the light distribution passing through the light-emitting sources 4 through the light-outcoupling surfaces 2c and 3c Lens 5 is generated - by a single continuous rectilinear lower edge UK, preferably in the form of a horizontal line, is limited downwards.
    In the present case, the diaphragm 11 has an opening 11a, through which light is guided by the coupling-out webs 2b and 3b into the lens 5, wherein in the installed state, an upper side of the opening 11a is delimited by a horizontally extending edge 11b (see FIG. 9). In the arrangement shown, the aperture is arranged between the light-outcoupling surfaces 2c and 3c and the lens 5 in such a way that the solid angle which can be illuminated from the outcoupling surfaces to the lens 5 is trimmed upwards, which in the present example results in that previously described edge beam L3 is blocked by the aperture 11 (for example by absorption or reflection) and does not reach the downstream lens 5. Thus, the area of the light output surfaces 2c and 3c, which can irradiate into the lens 5, be limited to a common solid angle. Depending on the geometric imaging properties, in particular the field curvature of the lens 5, it may be necessary to design the diaphragm 11 differently than previously indicated in order to achieve a light distribution which is bounded by a single continuous rectilinear lower edge, preferably in the form of a horizontal line downwards ,
    FIG. 7a shows a detailed representation of FIG. 7, in which the course of the marginal rays L2 and L3 is particularly clearly recognizable. FIG. 8 shows an illustration of the light distribution of the illumination device according to FIG. 7, in particular the light segments 6a of the first light guide unit 2 and the light segments 6b of the second light guide unit 3. Those regions of the light segments 6a and 6b which lie below the lower limit UK are represented by Aperture 11 hidden.
    Figure 9 is a front view of the aperture 11 of the lighting device la, which covers the coupling-out webs 2b and 3b outside the opening portion 11a. The diaphragm 11 may be embodied as an integral part of a lens holder supporting the lens 5, for example as a one-piece injection-molded part. The position of the diaphragm is, in principle, freely fixable along the optical axis OA and preferably chosen such that the position of the edge 11b with respect to the extraction webs 2b and 3b or their radiation angle, the light distribution emitted by the lens 5 by a single continuous rectilinear Lower edge UK, preferably in the form of a horizontal line, is limited downwards.
    In view of this teaching, one skilled in the art will be able to arrive at other, not shown embodiments of the invention without inventive step. The invention is therefore not limited to the embodiment shown. Also, individual aspects of the invention or the embodiment can be taken up and combined with each other. Essential are the ideas underlying the invention, which can be performed by a person skilled in the knowledge of this description in a variety of ways and still remain maintained as such.
    权利要求:
    Claims (12)
    [1]
    claims
    1. Lighting device (la) for a motor vehicle headlight, comprising a first light guide unit (2) with a holding web (2a) and at least two mutually spaced from the retaining web (2a) protruding outcoupling webs (2c), a second light guide unit (3) with a holding web ( 3a) and at least one outgoing from the holding web (3a) Auskopplungssteg (3b), a number of light sources (4) for coupling light in the Ausklplungsstege (2b, 3b) of the light guide units (2,3), wherein each coupling web (2b, 3b) at least one light source (4) is assigned, and - at least one light guide units (2,3) downstream lens (5), preferably a projection lens, for generating a light distribution, each coupling web (2b, 3b) a light extraction surface (2c, 3 c) for emitting light into the at least one lens (5), wherein the first and the second light guide unit (2,3) are separate from each other, the are arranged in such a way that between adjacent coupling-out webs (2b) of the first light guide unit (2) each a Auskopplungssteg (3b) of the second light guide unit (3) is arranged, characterized in that between the lens (5) and the light outcoupling surfaces (2c, 3c ) of the decoupling webs (2b, 3b) a diaphragm (11) is arranged, which is adapted to limit the coupled of the coupling webs (2b, 3b) in the lens (5) light in such a way that by the illumination device (la) radiated light distribution through a single continuous rectilinear lower edge (UK), preferably in the form of a horizontal line, is limited downwards.
    [2]
    2. Lighting device (la) according to claim 1, characterized in that the diaphragm (11) has a horizontal edge for limiting the light distribution.
    [3]
    3. Lighting device (la) according to claim 1, characterized in that the diaphragm (11) has an opening through which light from the outcoupling webs is guided into the lens, wherein in the installed state, an upper side of the opening is bounded by a horizontally extending edge ,
    [4]
    4. Lighting device (la) according to any one of the preceding claims, characterized in that the diaphragm (11) is made in one piece.
    [5]
    5. lighting device (la) according to any one of the preceding claims, characterized in that the first light guide unit (2) comprises a number of n protruding from the retaining web decoupling webs, wherein the second light guide unit has a number of n-1 of the retaining web projecting outcoupling webs, where preferably n = 3, n = 4 or n> 5.
    [6]
    6. lighting device (la) according to any one of claims 1 to 4, characterized in that the first light guide unit (2) comprises a number of n projecting from the holding web outcoupling webs, wherein the second light guide unit has a number of n from the holding web projecting outcoupling webs, where preferably n = 3, n = 4 or n> 5.
    [7]
    7. Lighting device (la) according to any one of the preceding claims, characterized in that the first and / or the second light guide unit (2, 3) are designed as transparent solid body.
    [8]
    8. Lighting device (la) according to any one of the preceding claims, characterized in that the first and / or the second light guide unit (2, 3) are designed as light-conducting hollow body.
    [9]
    9. Lighting device (la) according to any one of the preceding claims, characterized in that each outcoupling web (2b, 3b) is associated with at least one LED light source.
    [10]
    10. Lighting device (la) according to any one of the preceding claims, characterized in that individual, preferably all, the outcoupling webs (2b, 3b) associated light sources for generating a dynamic light distribution are individually controlled.
    [11]
    11. Motor vehicle headlight with at least one lighting device (la) according to one of the preceding claims.
    [12]
    12. Motor vehicle, comprising at least one, preferably two lighting devices (la) and / or motor vehicle headlights according to one of the preceding claims.
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    同族专利:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50825/2015A|AT517697B1|2015-09-30|2015-09-30|Lighting device for a motor vehicle headlight|ATA50825/2015A| AT517697B1|2015-09-30|2015-09-30|Lighting device for a motor vehicle headlight|
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    PCT/AT2016/060033| WO2017054020A1|2015-09-30|2016-08-19|Lighting device for a motor vehicle headlight|
    US15/762,855| US10527248B2|2015-09-30|2016-08-19|Lighting device for a motor vehicle headlight|
    EP16760640.9A| EP3356728B1|2015-09-30|2016-08-19|Lighting device for a motor vehicle headlight|
    CN201680057088.8A| CN108139057B|2015-09-30|2016-08-19|Lighting device for a motor vehicle headlight|
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