• 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:
    A headlamp (1) for vehicles, having at least one primary optic element (2) which has at least one light exit surface (6), with at least one secondary lens (3) associated with the at least one primary optic element (2) for imaging the at least one light exit surface (6). as a light image on the road, the at least one secondary lens (3) having a preferably aspherical front light exit surface (15), a rear light entry surface (14) and substantially planar boundary surfaces (10, 11, 12, 13) between the front light exit surface (15). and the rear light entry surface (14). In this headlight (1) in the transition region of an upper and / or lower boundary surface (10, 11) with the front light exit surface (15) an edge rounding (27, 30) is provided, whose surface is G2-continuous, wherein the average radius of curvature (r1 , r2) in the range of 2 to 30% of the radius of curvature (R) of the light exit surface (15) of the at least one secondary lens (3). The edge rounding (27, 30) in the transition region of an upper and / or lower boundary surface (10, 11) with the front light exit surface (15) is preferably at least G1 continuous or G2 continuous.
    公开号:AT516555A1
    申请号:T50894/2014
    申请日:2014-12-10
    公开日:2016-06-15
    发明作者:Lukas Taudt
    申请人:Zizala Lichtsysteme Gmbh；
    IPC主号:
    专利说明:

    Headlights for vehicles
    The invention relates to a headlamp for vehicles with at least one primary optic element which has at least one light exit surface with at least one secondary lens associated with the at least one primary optic element for imaging the at least one light exit surface as a light image onto the road, wherein the at least one secondary lens is a preferably aspherical one has front light exit surface, a rear light entrance surface and substantially flat boundary surfaces between the front light exit surface and the rear light entry surface.
    A headlamp of this type has become known from Applicant's AT 508604. In this headlamp secondary lenses are provided, in which between a flat rear lens surface and an aspherically curved front lens surface four flat boundary or trimming surfaces are present, which produce sharp edges with the front lens surface. In this case, the upper and lower edges produce unwanted effects in the photograph, which result from the illustration of the boundaries of the light exit surfaces of the light source modules and manifest themselves as stripes of different color and luminance in the photograph.
    An object of the invention is a reduction of these problems and a targeted change of the light distribution in the light image by a modified design of the secondary lens or secondary lenses.
    This object is achieved with a headlamp of the type specified above, in which according to the invention in the transition region of an upper and / or lower boundary surface with the front light exit surface, an edge rounding is provided, whose surface is G2 continuous, the average radius of curvature in the range of 2 to 30 % of the radius of curvature of the light exit surface of the at least one secondary lens.
    In terms of a soft light distribution, it is advantageous if the Kantenverrun- tion in the transition region of an upper and / or lower boundary surface with the front light exit surface is at least G-steadily.
    A particularly uniform light distribution is obtained when the Kantenverrun- tion in the transition region of an upper and / or lower boundary surface with the front light exit surface G2-continuous.
    If the edge rounding is formed in the transition region of an upper boundary surface with the front light exit surface, a disturbing horizontal and bright light line in the light image can be at least largely avoided.
    On the other hand, it can be provided that the edge rounding is formed in the transition area of a lower boundary surface with the front light exit surface, thereby shifting the upper limit of the luminous image upward.
    In a very well-proven embodiment of a headlamp a plurality of primary optic elements is provided, each having a plurality of light exit surfaces, wherein each primary optic element is associated with a secondary lens.
    In this case, it can be expediently provided that each primary optics element has attachment optics, in which light from LED light sources emerges from the front light exit surfaces coupled in from the rear.
    The invention together with further advantages is explained in more detail below by way of example embodiments, which are illustrated in the drawing. In this show
    1 is a perspective exploded view of a headlight according to the prior art,
    2 is a diagrammatic and enlarged view of a detail of FIG. 1,
    3 is a side view of the arrangement of FIG. 2,
    4 is a section along the plane IV-IV of Fig. 3,
    5 shows a light distribution for a headlamp according to the prior art in a representation customary in motor vehicle technology,
    6 and 7 in illustrations corresponding to Figures 3 and 4 a detail of a first embodiment of a headlamp according to the invention,
    8 shows a light distribution for a headlight according to the first embodiment of the invention,
    9 and 10 in illustrations corresponding to Figures 6 and 7, a detail of a second embodiment of a headlamp according to the invention,
    11 shows a light distribution for a headlight according to the second embodiment of the invention,
    12 and 13 in views corresponding to FIGS. 9 and 10 a detail of a third embodiment of a headlamp according to the invention,
    Fig. 14 shows a light distribution for a headlamp according to the second embodiment of the invention
    15 is a perspective view of left front and top of a secondary lens according to the prior art,
    16 is a view similar to FIG. 15 of a secondary lens according to a first embodiment of the invention, FIG.
    17 is a perspective view of left front and bottom of a secondary lens according to a second embodiment of the invention and
    Fig. 18, 19 and 20 to the secondary lenses of Fig. 15, 16 and 17 associated high beam distributions.
    With reference to Fig. 1, an embodiment of the invention will now be explained in more detail. In particular, the important parts for a headlight according to the invention are shown, it being understood that a motor vehicle headlamp contains many other parts that allow its meaningful use in a motor vehicle, in particular a car or motorcycle. Essential components of the headlight 1 in the present case are four primary optics elements 2 and four secondary lenses 3, these parts, since they are identically constructed here, each provided with the same reference numerals.
    Each Primäroptikelement consists in principle in the present case of three attachment optics 4, in which light from schematically drawn LED light sources 5 from behind, coupled and exits front light exit surfaces 6. The LED light sources 5 associated rear light entry surfaces are not visible in this illustration; each three light exit surfaces 6 of the primary optics element 2 lie in a light exit plane 7. Overall, twelve light exit surfaces 6 are thus present in this embodiment.
    The use of LEDs is not mandatory for the invention, other light sources, for example laser light sources including those with light-converting elements may be provided.
    In front of the primary optic elements 2 are four secondary lenses 3, each secondary optic element 2 having a secondary lens 3 associated therewith.
    The light exit surfaces 6 of the primary optic elements 2 are rectangular in the variant shown and have identical shape. In addition, the LED light sources 5bzw. at least the light exit surfaces of the primary optics parallel to each other and arranged with identical orientation. Furthermore, the primary optics, i. the light exit surfaces, arranged at a horizontal distance from each other, wherein all adjacent light exit surfaces have identical distances.
    Each of the primary optics elements 2, together with their light exit surfaces 7, generates a partial light distribution that is projected onto the road via the secondary lenses 3, so that the light distribution of the headlight results from the superposition of the twelve segments. This will be shown in more detail below.
    The arrangement of elements for a headlight 1 shown in Fig. 1 is described in the already mentioned above AT 508604 Bl of the applicant and forms a prior art.
    Reference is now made to FIG. 2, which shows in more detail a primary optic element 2 and a secondary lens 3. In the case of the primary optic element 2, a support plate 8 for LEDs and a holder 9 for the entire element 2 can be seen. Furthermore, the light exit plane 7 already shown in FIG. 1 is shown, as well as the focal point F1 of the secondary lens 3.
    The secondary lens 3 has an upper boundary surface 10, a lower boundary surface 11 and two lateral boundary surfaces 12, 13, namely a right and a left, it should be noted that the boundary surfaces are often designed according to design wishes. The terms "top", "bottom", "right" and "left" refer to a possible mounting position and are intended to facilitate the description, but are in no way intended to be limiting.
    In FIG. 2, a rear light entry surface is further provided with the reference numeral 14, wherein this surface is flat in the examples shown - but need not be flat. The front light exit surface is provided with the reference numeral 15, wherein this surface 15 is formed in general and preferred, but not necessarily aspherical.
    The section of the upper boundary surface 10 with the front light exit surface 15 results in an upper trim edge 16 and the section of the lower boundary surface 11 with the front light exit surface 15 a lower trim edge 17. A lateral (right) Beschnittkante with 18, a lateral (left) trim edge with 19, but play the lateral trim edges 18,19 - in contrast to the upper and lower trim edge 16 and 17 - for the invention to be described later, only a minor role.
    Referring now to FIG. 3, the parts shown in FIG. 2, namely the primary optic element 2 and the secondary lens 3, can be seen in a side view, the optical axis OA being shown. Again, the light exit plane 7 of the primary optic element is designated and again with Fl the focal point of the secondary lens 3. Also marked are the upper trim edge 16 and the lower trim edge 17.
    In Fig. 4, the arrangement of FIG. 3 can be seen, however, in a section along the line IV-IV of FIG. 3. For the same parts the same reference numerals as in FIGS. 1 to 3 were used, wherein additionally the light entry surface 20th a front optics 4 is designated. In addition, an upper edge beam 21, which runs through the upper trim edge 16, drawn, as well as a lower edge beam 22 which extends through the lower trim edge and a focal point beam 23. This focal point beam 23 propagates after passing through the secondary lens 3 parallel to the optical axis OA off.
    5 shows the total light distribution of a motor vehicle generated, for example, on a measuring screen (for example, at a distance of 25 m), which is composed of a high-beam distribution F and of a low-beam distribution A to form an entire light image. The high beam distribution F is generated by an arrangement as described above, whereas the low beam distribution A is generated by a light or headlight system which is not further considered here. It can be seen in the illustrated light image, an upper limit 24 of the high beam distribution F, which is for example the position of the 1 lx line, this upper limit 24 by the edge beam 22 (see Fig. 4) is determined. A sharp light line 25 is formed by the edge beam 21, which runs through the trim edge 16. Exactly this light line 25, which is perceived by a driver of the vehicle on the road as a bright and disturbing stroke, should be avoided as an undesirable factor in the light distribution and a possibility according to the invention to remedy this situation, shown in the following figures.
    Figs. 6 and 7 show substantially similar representations of the primary optic element 2 and the secondary lens 3 as in Figs. 3 and 4, wherein like reference numerals for the same parts and features are used. In contrast to the secondary lens 3 shown in FIGS. 3 and 4 here has the secondary lens 26 in the transition region of the upper boundary surface 10 with the front light exit surface 15 an edge rounding 27 or transition surface whose radius of curvature is denoted by ri, the use of the term " The radius of curvature "must not necessarily indicate a uniform radius of curvature of the edge rounding 27 or the transition surface. The surface of the edge rounding 27 should have G2 continuity (curvature continuity) and the edge rounding 27 in the transition region of the upper boundary surface 10 to the front light exit surface 15 is advantageously at least Gl steadily (tangency).
    However, particularly good results are obtained if the edge rounding has G2 continuity (curvature continuity) in order to produce disturbing artifacts in the generated
    However, in the simpler versions, GO continuity may suffice for the transition areas mentioned.
    Fig. 8 again shows, as well as Fig. 5, an entire light distribution consisting of a high beam distribution F and a low beam distribution A (the latter is shown only on the right side of the light image), where it can be seen that now the bright and disturbing Light line 25 according to Fig. 5 no longer occurs, but instead a diffused or "smeared" light strip 28, which is due to the edge fillet 27. Thus, the sharp lower limit of the matrix beam distribution is smeared over a certain angle range and occurs as a light strip 28 on Since the edge light beams hit the screen (or a road) in different vertical positions, there is a soft lower limit of the high beam distribution F compared to the starting situation of the prior art (see Figures 3 to 5) also express that the edge rounding 27 or the transition surface acts as a defocusing lens because it has a different focus.
    The embodiment of the invention according to FIGS. 6 to 8 was investigated on a secondary lens with a cutting width of 80 mm and a radius of curvature R of about 60 mm.
    These values gave good results in terms of "blurring" the light line 25, but it is recommended that the optimal radii of curvature of the fill for certain secondary lenses be determined by optical simulation calculations that yield results quickly, as shown for example in FIG.
    In the embodiment described above, the unwanted light strip 28 in the light image (see Fig. 5) by the upper Beschnittkante 16. It should be expressly noted that such a light line can also be caused by limitations in the beam path, namely, for example, by diaphragms, the lie in the beam path between the optical attachment 4 and the secondary lens 3, but are not shown here. Likewise, such lines of light can also be caused by light rays which pass through an exit edge of the attachment optics. In these cases, one speaks of bundle limitation or limitation of the light beams, of an aperture stop of the optical system.
    In the following, another embodiment of the invention will be explained with reference to Figs. 9 and 10, which aims to increase the upper limit of the Fem light distribution. Again, the figures show substantially similar representations of the primary optic element 2 and the secondary lens 3, as in the previous example and also here the same reference numerals for the same parts and features are used. Compared with the secondary lens 26 shown in FIGS. 6 and 7, the secondary lens 29 shown here has an edge rounding 30 or transition surface in the transition region of the lower boundary surface 11 with the front light exit surface 15, where the radius of curvature is denoted by Γ2. Again, the surface of the edge fillet 30 should have a G2 continuity, and the same applies to the transition region from the edge fillet to the lens exit face as to the previously described embodiment.
    In FIG. 11, the entire light distribution from a high-beam distribution F and a low beam distribution A is shown and it can be seen that, according to the non-rounded upper trim edge 16, there is a line of light 25 corresponding to the illustration in FIG. 5, but due to the lower edge rounding 30, a new, higher upper limit 31 of the high beam distribution arises, which can be seen from the dashed line upper boundary 24 of the high beam distribution of Fig. 5 (without bottom edge rounding).
    The embodiment of the invention shown in Figs. 9 to 11 has been studied on a secondary lens with a 45mm cutoff and a radius of curvature R of about 40mm, which is only one example of many.
    These values gave good results in terms of the magnification (increase) of the high beam height, as shown in FIG. Again, it is recommended to experimentally determine the optimum radii of curvature of the rounding for certain secondary lenses.
    It will now be shown with reference to Figures 12 to 14 that, of course, it is possible to "smear" the light streak on the one hand and to increase the upper limit of the high beam distribution, on the other hand.The representations of the primary optic element 2 and the secondary lens 3 again correspond in principle to the preceding illustrations FIGS. 3 and 4 and FIGS. 6 and 7, but with the difference that now both an upper edge rounding 16 and a lower edge rounding 30 are provided on the secondary lens 32.
    Fig. 14 shows the obligatory resulting light image which provides a headlamp having a secondary lens 32 with said edge fillets. Accordingly, the light image shows a widened or smeared light strip 18 instead of a sharp light line 25 and a raised upper limit 31 of the high beam distribution.
    For a better overview, the secondary lens 3 according to the prior art, the secondary lens 7 according to the first embodiment according to FIGS. 6 and 7 and the secondary lens 29 according to the second embodiment of FIGS. 15, 16 and 17 again in an isometric view. 9 and 10, wherein like reference numerals have been used again for the same parts and features.
    In the case of the secondary lens 26 according to FIG. 16, the boundary 33 between the light exit surface 15 and the edge rounding 27 is also drawn, as is the boundary 34 between the edge rounding 27 and the upper boundary surface 10 of the secondary lens.
    Similarly, in the secondary lens 29 shown in FIG. 17, the boundary 35 between the light exit surface 15 and the edge fillet 30 is drawn, and also the boundary 36 between the edge fillet 30 and the lower lenslet face 1 '.
    Shown in FIGS. 18, 19 and 20 are schematic photographs produced by secondary lenses corresponding to FIGS. 15, 16 and 17. In detail, the following is explained. FIG. 18 shows in the left half the high beam distribution F generated by a matrix arrangement (see FIG. 1) using a prior art secondary lens (FIG. 15), with some segments in the right half of FIG are shown, which correspond to the light exit surfaces 6 in Fig. 1. There are also upper 1.0 lx and 0.5 lx limits of the high beam distribution drawn and also the resulting according to the prior art unwanted light line 25. In the present case, also by a corresponding activation or non-activation of LED light sources generated blanking gap L is drawn, which was created so as not to dazzle an oncoming vehicle or a pedestrian.
    An analogous representation, however, for a secondary lens 26 with upper run-out can be seen in Fig. 19, wherein one also recognizes the light strip 28, which is caused by the upper edge rounding.
    Finally, Fig. 20 again shows, mutatis mutandis, a light distribution that occurs when using a secondary lens 29 with a lower edge rounding, in this lens, however, the upper edge rounding is missing, so that again the bright light line 25 can be seen in the photograph, but an increased upper limit the high beam distribution F occurs with respect to the two previously shown photographs. The different limits, also for the generated segments, are shown here for a measuring example with illuminance levels in lx.
    It should be understood that this greater edge rounding a greater extent, e.g. the high beam height so that it is within the control of the size of the edge rounding to increase the upper limit. The same applies mutatis mutandis to the upper edge rounding, in which a larger rounding leads to a wider smearing of the unwanted light line.
    The invention is applicable in principle for headlamps which have a secondary lens for imaging a light image. A headlamp with matrix modules, namely primary optics elements 2, is shown with reference to FIG. 1, but the invention can also be applied to so-called "pixel systems", since in principle the same beam path with the same problems of sharp light / dark boundaries occurs there.
    In the embodiments, plano-convex secondary lenses are shown, but it should be understood that the invention is not limited to such. Rather, for example, biconvex secondary lenses are used, wherein the light entry surfaces mostly spherical shape with relatively large radii of curvature, namely, typically at least 125 mm, have.
    As already mentioned several times, it is essential that the compounds according to the invention exhibit G-stability, preferably G 2 -stability. For the transitions of the lateral boundary surfaces 12 and 13 (see Fig. 2) to the front light exit surface of a secondary lens such continuity requirements are generally not given, here usually a GO steadiness (positional stability or point continuity) will be sufficient.
    权利要求:
    Claims (7)
    [1]
    claims
    1. headlight (1) for vehicles, with at least one primary optic element (2) having at least one light exit surface (6), with at least one, the at least one primary optic associated secondary lens (3) for imaging the at least one light exit surface as a light image on the road in that the at least one secondary lens has a preferably aspherical front light exit surface (15), a rear light entry surface (14) and substantially planar boundary surfaces (10, 11, 12, 13) between the front light exit surface and the rear light entry surface, characterized in that Transition region of an upper and / or lower boundary surface (10,11) with the front light exit surface (15) an edge rounding (27, 30) is provided, whose surface is G2-continuous, wherein the average radius of curvature (rl, r2) in the range of 2 to 30% of the radius of curvature (R) of the light exit surface (15) of at least ei NEN secondary lens is located.
    [2]
    2. Headlight according to claim 1, characterized in that the edge rounding (27, 30) in the transition region of an upper and / or lower boundary surface (10,11) with the front light exit surface (15) is at least G-steady.
    [3]
    3. Headlight according to claim 2, characterized in that the edge rounding (27, 30 in the transition region of an upper and / or lower boundary surface (10,11) with the front light exit surface (15) G2-continuous.
    [4]
    4. headlight one of claims 1 to 3, characterized in that the edge rounding (27) in the transition region of an upper boundary surface (10) with the front light exit surface (15) is formed.
    [5]
    5. Headlight according to one of claims 1 to 4, characterized in that the edge rounding (27) in the transition region of a lower boundary surface (11) with the front light exit surface (15) is formed.
    [6]
    6. Headlight according to one of claims 1 to 5, characterized in that a plurality of primary optic elements (4) each having a plurality of light exit surfaces (6) is provided, wherein each primary optic element is associated with a secondary lens (3).
    [7]
    7. Headlight according to claim 6, characterized in that each primary optic element (4) attachment optics (4), in which light from LED light sources (5) coupled from the rear exits from the front light exit surfaces (6).
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP3230650B1|2020-09-23|
    AT516555B1|2016-09-15|
    EP3230650A1|2017-10-18|
    WO2016090397A1|2016-06-16|
    CN107002969B|2021-01-08|
    CN107002969A|2017-08-01|
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    法律状态:
    2016-11-15| HC| Change of the firm name or firm address|Owner name: ZKW GROUP GMBH, AT Effective date: 20161014 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50894/2014A|AT516555B1|2014-12-10|2014-12-10|Headlights for vehicles|ATA50894/2014A| AT516555B1|2014-12-10|2014-12-10|Headlights for vehicles|
    EP15808078.8A| EP3230650B1|2014-12-10|2015-11-23|Headlight for vehicles|
    PCT/AT2015/050297| WO2016090397A1|2014-12-10|2015-11-23|Headlight for vehicles|
    CN201580067227.0A| CN107002969B|2014-12-10|2015-11-23|Headlight for a vehicle|
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