• 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:
    The invention relates to a lighting unit for a motor vehicle headlight for generating a light beam having a light-dark boundary, comprising: at least one light source, a reflector, an outlet lens with an outer surface; 3a), Brenn a focal line region (4), which is arranged between the reflector (2) and the exit lens (3), and furthermore each with a collimator (10, 10a, 10b) for each light source (1, 1a, 1b), wherein the collimator (10, 10a, 10b) aligns the light beams (S1) fed from its associated light source (1, 1a, 1b) into the collimator (10, 10a, 10b) to a light beam of light beams (S2), and wherein the reflector (2) deflects the light beams of the light beam emerging from the collimator (10, 10a, 10b) into a focal line (FL) lying in the focal line region (4), and the light beams reflected by the reflector at least from the exit lens (3) in the vertical direction from that the light rays emerging from the exit lens (3) form a light distribution with a light-dark boundary, and wherein the outer surface (3a) of the exit lens (3) is formed by a groove-shaped structure in a smooth base surface (BF), wherein the grooves (3b) forming the groove-shaped structure extend in a substantially vertical direction, and preferably two grooves (3b) lying next to one another in the horizontal direction extend through an elevation, in particular substantially vertically, which preferably extends over the entire vertical extent of the Grooves (3b) extends, are separated.
    公开号:AT518109A1
    申请号:T50015/2016
    申请日:2016-01-14
    公开日:2017-07-15
    发明作者:Eichinger Bernd
    申请人:Zkw Group Gmbh；
    IPC主号:
    专利说明:

    Lighting unit for a motor vehicle headlight for generating a
    Light bundle with light-dark border
    The invention relates to a lighting unit for a motor vehicle headlight for generating a light beam with light-dark boundary, comprising: at least one light source, a reflector, an exit lens with an outer surface, a focal line area which is arranged between the reflector and the exit lens and further each having a collimator for each light source, the collimator aligning the light beams fed into the collimator by the light source associated therewith into a light beam of light rays, and the reflector moving the light rays of the light beam exiting the collimator into a light focus region Distracts focal line, and wherein the light rays reflected by the reflector are deflected by the exit lens at least in the vertical direction such that the emerging from the exit lens light beams form a light distribution with a light-dark boundary, wherein the light-Dun kel limit as an image of the focal line or the focal line area through the exit lens results, and wherein
    Reflector, exit lens and focal line region, and preferably the at least one collimator, are formed of a translucent body, and wherein at the reflector boundary surface of the reflector and / or the boundary surface of the focal line region, and preferably at the collimator boundary surface of the at least one collimator are totally reflected in the translucent body propagating light rays.
    Furthermore, the invention relates to a motor vehicle headlight, which has at least one such lighting unit.
    A similar lighting unit has become known, for example, from DE 60 2006 000 180 T2.
    A lighting unit in the context of the present invention may be used in a motor vehicle headlight, e.g. be used for the realization of a part of a low beam distribution, in particular the apron light distribution of a low beam distribution.
    Current design trends often require headlamps which have narrow and horizontally extending, slit-shaped light exit openings in the vertical direction. An illumination unit mentioned in the introduction can be realized in the region of the light exit surface with a low overall height, which in certain embodiments can only be up to 10 mm or up to 15 mm, resulting in a slot-shaped light exit surface extending in the horizontal direction.
    In the case of the lighting units mentioned at the beginning, as also described in the abovementioned DE 60 2006 000 180 T2, it is provided that the light exit surface, i. the outer surface of the exit lens is smooth. It has been found that often the achievable light image or the achievable light distribution in the horizontal direction is not sufficiently wide.
    It is an object of the invention to provide an improved lighting unit.
    This object is achieved with an illumination unit mentioned in the introduction in that, according to the invention, the outer surface of the exit lens is formed by a groove-shaped structure in a smooth base surface, wherein the grooves forming the groove-shaped structure extend in a substantially vertical direction, and preferably two each in the horizontal direction adjacent grooves by a, in particular substantially vertically extending, elevation, which preferably extends over the entire vertical extent of the grooves, are separated. The smooth base surface is preferably C0-continuous and in particular has no horizontally extending edges.
    As described above, the necessary width for the desired light image, in particular not for an apron light distribution of a low-beam light distribution, can often not be achieved with a smooth outer surface of the exit lens. Due to the structure according to the invention on the outer surface of the exit lens, a horizontal blurring of the exiting light beams is achieved, whereby the desired width of the light distribution can be achieved.
    Preferably, exactly one light source with exactly one collimator is provided.
    Preferably, it may be provided that the first base-section curves resulting from cutting the smooth base surface with first, non-vertical sectional planes are rectilinear, and wherein the first outer-surface sectional curves resulting from cutting the outer surface with these first section planes have a sinusoidal profile exhibit.
    In particular, it can be provided that the first outer surface sectional curves in the first sectional planes, with respect to the basic sectional curve of the respective first sectional plane, are proportional to sinN (k * x), with N = 1, 2, 3, ... ., where x denotes the coordinate along the respective base sectional curve and k denotes a constant.
    It can be provided that the zero crossings of the sinusoidal first outer surface section curves lie on the first base sectional curves.
    It thus holds that the course is proportional to sinN (k * x) + c with c = 0.
    In particular, it can be provided that the value for the constant k is identical for all first outer surface sectional curves.
    Furthermore, it may be expedient if the second base-sectional curves resulting from a cutting of the smooth base surface with second, vertical cutting planes, which run parallel to an optical axis of the exit lens, are curved, in particular outwardly curved, preferably the second Basic-cut curves are steady.
    In this context, it may be expedient if the second outer surface sectional curves resulting from a cutting of the outer surface with defined second cutting planes connect points of the outer surface with a maximum distance to the base surface.
    In particular, it is advantageous if, when proceeding along the second basic sectional curve in the defined sectional planes, the normal distance to the second outer surface sectional curve is a function A (s) of a parameter s, which indicates the position on the second basic sectional curve ,
    The second cutting planes are vertical planes parallel to the optical axis of the translucent body, i. the exit lens of the optical body.
    Below the optical axis, the optical axis of the optical body, in particular the center line of the optical body is defined with respect to the apex of the exit lens.
    At a considered point on the base surface, the first cutting plane results as follows: the first cutting plane in the point under consideration is a plane normal to the tangent plane to the base plane, this plane, i. the first cutting plane, still normal to the second cutting plane, in which the point is located, is. As already explained above, the second cutting plane is a vertical sectional plane through the smooth base surface, which runs parallel to the optical axis (or through this optical axis) and in which the point under consideration lies.
    In a base surface which is curved only in the vertical direction but normal in the horizontal direction to the optical axis but rectilinear, although the angle with respect to the optical axis changes between adjacent first cutting planes, in the horizontal direction normal to the optical axis, on the other hand all cutting planes straight and "parallel" to each other.
    In this case, it is advantageously provided that the normal distance A (s) increases continuously as it progresses along the second base-section curve, whereby preferably the normal distance at a lower edge of the base surface is smaller than at an upper edge of the base surface, whereby the normal distance A (s) for example after the
    A (s) = Ao * (K - s), where s [0,1], where s = 0 denotes the position at the top and s = 1 denotes the position at the bottom, and K = 1 or K> 1 , results. Thus, for K = 1, Ao is the normal distance at an upper or lower, preferably the upper edge (s = 0) of the base surface (BF), at the lower edge (s = 1), A (l) = 0. For a value K> 1 holds that at the upper edge (s = 0) the normal distance is A (0) = K * Ao, and at the lower edge the normal distance A (l) = Ao * (K - 1)> 0.
    In the case with K> 1, in part, a better optical efficiency has been shown than in the case K = 1.
    Thus, in this embodiment, there are vertical second cutting planes, in each of which the superimposed "zero crossings", ie those regions where the outer surface and the base surface coincide with each other by corresponding second outer surface sectional curves, in this case with the second base-sectional curves coincide, are connected.
    Likewise, there are second cutting planes in which the second outer surface intersection curves connect the negative normal distances / amplitudes together. For a clear description, however, it is sufficient to specify the second outer surface section curves for the "positive" normal distances / amplitudes, the other relationships result from the sinusoidal curve in the first sectional planes
    It may be that the at least one light source is lower than the focal line region, and the light emitted by the at least one light source is directed upwards to be reflected by the reflector downwards in the direction of the focal line region.
    It can also be provided that the at least one light source is higher than the focal line region, and the light emitted by the at least one light source is directed downwards in order to be reflected by the reflector upwards in the direction of the focal line region.
    It is preferably provided that the reflector is a surface, for example a cylindrical surface, which has a parabola as guideline, wherein the focal line of the reflector is formed for example by a straight line, which is preferably substantially parallel to the generatrix of the cylinder. Preferably, the parabola axis is orthogonal to the generatrix and parallel or antiparallel to the main emission direction of the at least one light source.
    It can also be provided that the reflector is a parabolic surface with a major axis in the vertical direction, which is trimmed, for example, cylindrically. The trim does not have to be cylindrical.
    For example, it can be provided that the outer surface of the exit lens is curved in the vertical direction outwards, and preferably in the horizontal direction is rectilinear, and is formed for example by a cylindrical surface with a straight cross-section along an outwardly convex curve. An example of such an outwardly convex curve is called an aspheric lens contour.
    For example, it is a free-form lens, which is curved in the vertical direction to the outside and not curved in the horizontal direction.
    In particular, it can further be provided that the cylindrical surface of the outer surface has generatrices that are substantially parallel to the generatrices of the reflector.
    It may be provided that a light source is provided, but it may also be provided that a plurality of light sources adjacent to each other, for example in the direction of a generatrix of the reflector, are adjacent. The distances between the light source emission points or light source emission surfaces, in particular their light emission centers, are preferably identical.
    The at least one light source comprises a light-emitting diode or a plurality of light-emitting diodes.
    In one embodiment of the invention, a sinusoidal groove optic is provided in summary, with the sine function normal to the lens surface, i. the smooth base surface of the exit lens is. The period preferably remains unchanged, while preferably the groove depth (amplitude), in particular linear, e.g. as described above, from a given initial value Ao or Ao * K (the width of the light distribution can be set with this value) at the upper edge of the light emitting surface to a value of zero or Ao * (K-1) at the lower edge of the lens.
    This can be achieved that widened the distribution of light as desired, and surprisingly, it has also revealed that the light-dark boundary to the outside, even with a rectilinear focal line of the translucent body, does not bends.
    In the following the invention is discussed in more detail with reference to the drawing. In this shows
    1 shows the essential components of a lighting unit according to the invention for a motor vehicle headlight,
    FIG. 2 shows a vertical section parallel to an optical axis of the illumination unit from FIG. 1, FIG.
    3 shows a vertical section parallel to an optical axis of a further illumination unit according to the invention,
    4 is a perspective view of a lighting unit with a translucent body whose exit lens has no groove structure,
    4a shows a light distribution generated by a lighting unit from FIG. 4,
    Fig. 5 again the lighting unit of Figure 1 and
    5a shows the light distribution generated with this,
    6 shows in a vertical section an enlarged section of the light-transmissive body between its focal line and the light exit surface,
    7 shows the course of the light exit surface of the exit lens of the translucent body in a section along an exemplary first sectional plane SEI from FIG. 6, FIG.
    8 again shows the vertical section from FIG. 6 with exemplary sectional areas A-A, B-B, C-C and D-D,
    9a-9d show the course of the light exit surface of the exit lens of the translucent body in the various sections A-A, B-B, C-C and D-D in accordance with FIG. 8 for K = 1, and FIG
    10a-10d show the course of the light exit surface of the exit lens of the light-permeable body in the various sections A-A, B-B, C-C and D-D according to FIG. 8 for K> 1.
    In the context of this description, the terms "top", "bottom", "horizontal", "vertical" are to be understood as indications of the orientation when the unit is arranged in the normal position of use after it has been installed in a vehicle-mounted lighting device.
    FIG. 1 shows a lighting unit 100 according to the invention for a motor vehicle headlight for generating a light beam with a light-dark boundary. The lighting unit usually comprises one or more light sources, in the concrete example three light sources 1, 1a, 1b, a reflector 2, an exit lens 3 with an outer surface 3a, a focal line region 4, which is arranged between the reflector 2 and the exit lens 3, and Furthermore, each collimator 10,10a, 10b for each light source 1, la, lb.
    The light sources 1, 1a, 1b preferably each comprise one light-emitting diode or a plurality of light-emitting diodes.
    The reflector 2 deflects the light beams S2 of the light beams emerging from the collimators 10, 10a, 10b into a focal line FL lying in the focal line area 4, and the light beams S3 totally reflected by the reflector 2 are illuminated by the exit lens 3 of the body 101 at least in FIG deflected in a vertical direction V such that the emerging from the exit lens 3 light beams S4 form a light distribution with a cut-off. The light-dark boundary results here as an illustration of a focal line region 4, in which the focal line FL lies, through the exit lens 3.
    Reflector 2, exit lens 3 and focal line region 4 and the collimators 10,10a, 10b are formed of a translucent, one-piece body 101, and the reflector boundary surface of the reflector 2 and the boundary surface of the focal line region 4 and to the collimator boundary surfaces of the collimators 10th , 10a, 10b, which are totally reflected in the light-transmissive body 101 propagating light beams SI, S2, S3.
    The corresponding course of the light beams is shown in FIGS. 2 and 3.
    The translucent material of which the body 101 is formed preferably has a refractive index greater than that of air. The material contains e.g. PMMA (polymethyl methacrylate) or PC (polycarbonate) and is particularly preferably formed therefrom.
    It can be provided that the collimators 10, 10a, 10b direct the light beams S1 fed into the collimator 10, 10a, 10b from the light source 1, 1a, 1b into a light bundle of substantially parallel light beams S2, which light bundle S2 is itself propagates substantially normal to an exit plane E of the collimator 10, 10a, 10b.
    In general, and in particular also in the concrete embodiment, it may be advantageous if the collimators 10, 10a, 10b emit the light in one direction in parallel (eg in the direction vertical V in the light image) and in the direction normal thereto (horizontally H in the photo) fanned out accordingly. Preferably, outer, in particular the two outer collimators 10.10b have an asymmetrical emission characteristic in order to avoid reflections on the side surfaces of the light-transmissive body 101 and inhomogeneities caused thereby.
    In the present case, an embodiment with three light sources and three collimators is shown. However, it is also the use of only a single light source, in particular more precisely a light emitting diode, and a single associated collimator sufficient to achieve the desired light distribution can.
    Thus, the light is already scattered horizontally in front of the focal plane of the exit lens. As a result of this widening of the light, in conjunction with the scattering optics according to the invention described below on the front side of the light-transmitting body 101, a broad light distribution, in particular a wide advance light distribution, can be achieved.
    It would also be conceivable to produce an asymmetrical apron light distribution by adapting the horizontal emission characteristic, for example by the central collimator not being symmetrical. A horizontal step in the focal line area could also be used to implement an asymmetrical course of the cut-off line.
    The reflector 2 is formed, for example, as a cylindrical surface having a parabola as a guideline, wherein the focal line BL of the reflector is formed by a straight line which is substantially parallel to the generatrix of the cylinder.
    The focal line of the reflector FL lies in the focal line region 4 of the body 101 and preferably coincides substantially with the focal line of the exit lens 3.
    The focal line area 4 is an edge in the body 101. By imaging the edge 4, which is a curved line, in particular with a small curvature or particularly preferably a straight line, the HD line is formed.
    The light possibly exiting below the edge 4 over the surface 4a is shaded by exposing the surface 4a below the edge 4, e.g. through a blind or a dark, e.g. black or brown coating on its outside, etc., is shaded to avoid false / stray light
    The outer surface 3a of the exit lens 3 of the body 101 is curved outwards in the vertical direction, preferably in such a way that in a central region the exit surface in the light exit direction is further forward than its upper and lower edge regions. In the horizontal direction, the exit lens is preferably rectilinear and is formed, for example, by a straight-sided cylindrical surface along an outwardly convex curve, or by a free-form lens curved outwardly in a vertical direction and not curved in a horizontal direction.
    In particular, it can further be provided that the cylindrical surface of the outer surface 3a has generatrixes which are substantially parallel to the generatrices of the reflector, or rectilinear portions of the freeform lens are preferably parallel to the generatrices of the reflector 2.
    FIG. 2 corresponds to a vertical section through the illumination unit from FIG. 1. Here, the light sources 1 lie lower than the focal line region 4, and the light emanating from the one light sources is directed upwards in order to be described by the reflector 2 in the downward direction of the focal line area 4 to be reflected.
    FIG. 3 shows a lighting unit of basically similar design, with the difference that here the at least one light source 1 is higher than the focal line area 4, and the light emanating from the at least one light source 1 is directed downwards through the reflector 2 upwards in FIG Direction of the focal line area 4 to be reflected.
    4 shows a lighting unit from which a lighting unit 101 'according to the invention is "generated" in principle, as already indicated in FIGS, 1 to 3. The lighting unit 101' from FIG. 4 has the structure basically already described above, so that a further discussion is provided here The illumination unit 101 'shown in FIG. 4 has an exit lens 3' with a smooth exit surface 3a '.
    Fig. 4a shows a light distribution with a light-dark boundary, e.g. a low beam distribution or a part, e.g. the apron of a low beam distribution. Such a light distribution has a certain width, as indicated in Fig. 4a.
    Starting from such a lighting unit 101 ', the lighting unit 101 already shown in FIG. 1 is shown again in FIG. 5.
    The difference from the embodiment according to FIG. 4 is that, in the illumination unit 101 of FIG. 5, the outer surface 3a of the exit lens 3 consists of a smooth base surface BF (corresponding to the exit surface 3a 'of FIG. 4), which has a groove-like structure is provided, wherein the groove-shaped structure forming grooves 3b in the vertical direction, ie from top to bottom, run. Concretely, the outer surface 3a of the exit lens 3 is formed by a groove-shaped structure in a smooth base surface BF, wherein the grooves 3b forming the groove-shaped structure extend in a substantially vertical direction, and preferably two in each case horizontally adjacent grooves 3b by one, in particular substantially vertically extending elevation, which preferably extends over the entire vertical extension of the grooves 3b, are separated.
    As described above, with a smooth outer surface BF, 3a 'of the exit lens, it is often not possible to achieve the necessary width for the desired light image, in particular not for an apron light distribution of a low beam distribution. Due to the structure according to the invention on the outer surface of the exit lens, a horizontal blurring of the exiting light beams is achieved, whereby the desired width of the light distribution can be achieved, as shown schematically in FIG. 5a.
    FIGS. 6-8, 9a-9d, 10a-10d show below a preferred embodiment of this groove structure according to the invention.
    Figure 6 and Figure 8 show vertical sections through the body 101, and in each case an enlarged section of the light-transmissive body between its focal line FL and the light exit surface 3a.
    FIG. 6 shows a second vertical section which contains a considered point P on the base surface BF, FIG. 8 shows a second vertical section SE2 in which four points PA, PB, PC and PD considered as examples lie.
    If one cuts the smooth base surface BF with first, non-vertical cutting planes SEI (these cutting planes SEI are discussed in more detail below), for example at the point P (FIG. 6) or corresponding to the sections AA, BB, CC, DD (FIG. 8), This results in the first base-section curves BSK1, which run in a straight line, which in a cutting of the
    Outer surface 3a having these first sectional planes SEI resulting first outer surface sectional curves SKI (corresponding to the course of the lens outer surface in these sectional planes SEI) have a sinusoidal course.
    The smooth base surface is an intellectual construct in relation to which the outer surface actually realized is described. The first non-vertical cutting planes SEI are a multiplicity of such non-vertical cutting planes, which are still defined precisely below.
    In the preferred example shown, the first outer surface sectional curves SKI in the first sectional planes SEI, with respect to the basic sectional curve BSK1 of the respective first sectional plane SEI, are proportional to sinN (k * x), with N = 1,2,3 , .... (in the example shown N = 1), where x denotes the coordinate along the respective base-section curve BSK1 and k is a constant.
    It can be provided that the zero crossings of the sinusoidal first outer surface sectional curves SKI lie on the first basic sectional curves BSK1. It thus holds that the course is proportional to sinN (k * x) + c with c = 0.
    FIG. 7 shows such an exemplary first sectional plane SEI in which the point P lies, which is normal to the tangential plane TE in the point P (FIG. 6), for a general illustration of the relationships. In this section, the lens outer surface is shown with respect to a first base section curve BSK1. The base intersection curve BSK1 is a line with the parameter x along this line BSK1. The lens outer contour in this section is a first outer surface sectional curve SKI, which in this example is proportional to sin (k * x). Depending on a position s (for the parameter s see the discussion below) corresponding to the point P, i. s = sp in the section according to FIG. 6, the maximum amplitude is determined by A (sp), as shown in FIG. The determination of the amplitude will be discussed in more detail below.
    FIG. 8 shows a section along a second, vertical sectional plane SE2 parallel to the optical axis Z, with the four exemplary points PA, PB, PC and PD.
    The first sectional planes SEI are shown in these four points, and the corresponding curves of the resulting second outer surface sectional curves SK2 for the four selected sectional planes SEI (corresponding to sections A-A, B-B, C-C and D-D) are shown in FIGS. 9a-9d. For the sake of clarity, twice the amplitude, ie the distance between maximum and minimum deflection, is shown in the sections.
    In turn, in correspondence with FIG. 6, the sinusoidal profile of the second outer surface sectional curve SK2 is recognizable, k applies for k = 2 * π / Τ, with the period length T. Preferably, it is provided that the value for the constant k is identical for all first outer surface sectional curves SEI.
    In general, regardless of the embodiment shown, typical values for the period length T [mm] are in a range up to 2.50 mm, preferably up to 2.00 mm. In particular, preferred values are between 0.25 mm to 2.50 mm, for example between 1.25 mm to 2.00 mm.
    Preferred values for the maximum amplitude Ao [m], regardless of the embodiment shown, range from 50 gm to 350 gm, a typical value being 250 gm.
    As a favorable value range for the size ratio Ao to T, for example 0.1 <(T / Ao) <0.250 has resulted.
    The above information applies to the case K = 1 (for the parameter K see the comments above in the introduction), for the case K> 1, the analog considerations apply, in which case in the two preceding paragraphs Ao by Ao * K to is substitute.
    FIG. 8 further shows (as well as FIG. 6) that the second base-section curves BSK2 resulting from cutting the smooth base surface BF with the second vertical sectional planes SE2, which run parallel to an optical axis Z of the exit lens 3, are curved, in particular curved to the outside, are formed, wherein preferably the second base-sectional curves BSK2 are continuous.
    In this context, it is provided that the second outer surface sectional curves SK2 resulting from a cutting of the outer surface 3a with defined second sectional planes SE2 connect points of the outer surface 3a with a maximum distance to the base surface BF. The second planes SE are thus preferably vertical sectional planes parallel to the optical axis Z, for which the amount of sinN (k * x) = 1. These second planes are sufficient for the definition of the outer lens surface, the regions between these vertical planes are defined by the sine function described above.
    With a progression along the second basic intersection curves BSK2 in the defined intersecting planes SE2, the normal distance of the second outer surface intersection curve SK2 to the second basic intersection curve BSK2 can be considered as a function A (s) of a parameter s representing the position on the second basis -Section curve BSK2 indicates represent.
    For the time being, once again coming back to the first cutting planes, it should be said that in a considered point P (FIG. 6), PA, PB, PC, PD (FIG. 8) on the base surface BF the first cutting plane SEI results as follows: the first sectional plane SEI in the considered point P, PA,... is a plane normal to the tangential plane TE to the base surface BF, this plane (= sectional plane SEI) still remaining normal to the second sectional plane SE2, in which the point P is, stands. As already explained above, the second cutting plane is a vertical sectional plane through the smooth base surface BF, which runs parallel to the optical axis Z (or through this optical axis Z) and in which the considered point P lies. The first sectional planes SEI enclose an angle of 90 ° with the second basic sectional curve BSK2.
    In a base surface which is curved only in the vertical direction but normal in the horizontal direction to the optical axis Z but straight, between adjacent first cutting planes SEI, although the angle with respect to the optical axis Z, in the horizontal direction normal to the optical changes Axis Z, however, all the cutting planes run straight and "parallel" to each other.
    Now coming back to the second, vertical sectional planes SE2 and the course of the outer surface section curve SK2, the function A (s) follows, for example, the
    Correlation A (s) = Ao * (1-s), with s [0,1], where Ao is the normal distance at the upper edge of the base surface BF.
    Here, s = 0 is the position at the upper edge of the base surface, where A (0) = Ao, at the lower edge A (l) = 0. The parameter thus represents a normalized arc length along the curve BSK2. For the parameter s applies in the four points according to FIG. 8:
    Thus, in this embodiment, there are vertical second cutting planes, in each of which the superimposed "zero crossings", ie those regions where the outer surface and the base surface coincide with each other by corresponding second outer surface sectional curves, in this case with the second base-sectional curves coincide, are connected.
    Likewise, there are second cutting planes in which the second outer surface intersection curves connect the negative normal distances / amplitudes together. For a clear description, however, it is sufficient to specify the second outer surface section curves for the "positive" normal distances / amplitudes, the other relationships result from the sinusoidal curve in the first sectional planes.
    The above-described relation A (s) = Ao * (l-s) is a special case of the more general case A (s) = Ao * (K-s), where K = 1. It has been found that partly the optical Efficiency is better for K> 1 than for K = 1. A typical value for parameter K is in the range of 1.2 to 1.45, preferably about 1.33.
    In this case shown in FIGS. 10a-10d
    In summary, the contour of the outer surface 3a can be represented by an "imaginary" base surface BF
    In one embodiment of the invention, a sinusoidal groove optic is provided in summary, with the sine function normal to the lens surface, i. the smooth base surface of the exit lens is. The period preferably remains unchanged, while preferably the groove depth (amplitude), in particular linear, from a certain initial value Ao (with this value, the width of the light distribution can be set) at the upper edge of the light exit surface to a value of zero at the lower edge of the lens changed.
    This can be achieved that widened the distribution of light as desired, and surprisingly, it has also revealed that the light-dark boundary to the outside, even with a rectilinear focal line of the translucent body, does not bends.
    权利要求:
    Claims (17)
    [1]
    claims
    1. Lighting unit for a motor vehicle headlight for generating a light beam with cut-off, comprising: - at least one light source (1, la, lb), - a reflector (2), - an exit lens (3) with an outer surface (3a) , - a focal line region (4), which is arranged between the reflector (2) and the exit lens (3), and furthermore each with a collimator (10, 10a, 10b) for each light source (1, 1a, 1b), wherein the Collimator (10, 10a, 10b) aligning the light beams (S1) fed into the collimator (10, 10a, 10b) from its associated light source (1, 1a, 1b) to form a light bundle of light beams (S2), and wherein the reflector (2) deflecting the light beams (S2) of the light beam emerging from the collimator (10, 10a, 10b) into a focal line (FL) lying in the focal line region (4), and the light beams (S3) reflected by the reflector (2) be deflected from the exit lens (3) at least in the vertical direction (V), the s the light beams (S4) emerging from the exit lens (3) form a light distribution with a light-dark boundary, the light-dark boundary being represented as an image of the focal line (FL) or of the focal line area (4) through the exit lens (FIG. 3), and wherein the reflector (2), exit lens (3) and focal line region (4), and preferably at least one collimator (10, 10a, 10b), are formed from a light-transmitting body (101), and wherein on the reflector Boundary surface of the reflector (2) and / or the boundary surface of the focal line region (4), and preferably on the collimator boundary surface of the at least one collimator (10,10a, 10b), in the translucent piece (101) propagating light beams (SI , S2, S3) are totally reflected, characterized in that the outer surface (3a) of the exit lens (3) is formed by a groove-shaped structure in a smooth base surface (BF), wherein the groove-shaped structure b In each case, two grooves (3b) which lie next to one another in the horizontal direction extend through an elevation, which extends in particular substantially vertically and preferably over the entire vertical extent of the grooves (3b) , are separated.
    [2]
    2. Lighting unit according to claim 1, characterized in that at a cutting of the base surface (BF) with first, non-vertical sectional planes (SEI) resulting first base-section curves (BSK1) are rectilinear, and wherein at a cutting the Outer surface (3a) with these first cutting planes (SEI) resulting first outer surface sectional curves (SKI) have a sinusoidal course.
    [3]
    3. Lighting unit according to claim 2, characterized in that the first outer surface sectional curves (SEI) in the first sectional planes (SEI), with respect to the basic sectional curve (BSK1) of the respective first sectional plane (SEI), proportional to sinN (k * x), with N = 1, 2, 3, ...., where x denotes the coordinate along the respective basic intersection curve (SEI) and k denotes a constant.
    [4]
    4. Lighting unit according to claim 3, characterized in that the zero crossings of the sinusoidal first outer surface section curves (SEI) lie on the first base section curves (BSK1).
    [5]
    5. Lighting unit according to claim 3 or 4, characterized in that the value for the constant k for all first outer surface sectional curves (SEI) is identical.
    [6]
    6. Lighting unit according to one of claims 1 to 5, characterized in that in a cutting of the base surface with second, vertical sectional planes (SE2), which parallel to an optical axis (Z) of the exit lens (3) extend, resulting second base Curved curves (BSK2) curved, in particular outwardly curved, are formed, wherein preferably the second base-sectional curves (BSK2) are continuous.
    [7]
    7. Lighting unit according to claim 6, characterized in that at a cutting of the outer surface (3a) with defined second cutting planes (SE2) resulting second outer surface sectional curves (SK2) points of the outer surface (3a) with a maximum distance to the base surface (BF ) connect with each other.
    [8]
    8. Illumination unit according to claim 7, characterized in that, when proceeding along the second base-section curve (BSK2) in the defined sectional planes (SE2), the normal distance to the second outer-surface sectional curve (SK2) is a function A (s) of a parameter s indicative of the position on the second basic intersection curve (BSK2).
    [9]
    9. Lighting unit according to claim 8, characterized in that with a progression along the second base-sectional curve (BSK2) the normal distance A (s) increases continuously, wherein preferably the normal distance at a lower edge of the base surface (BF) is less than an upper edge of the base surface, wherein the normal distance A (s), for example, according to the relationship A (s) = Ao * (K - s), with s [0,1], where s = 0 the upper edge and s = 1 the lower edge, and K = 1 or K> 1, where Ao is the normal distance at an upper or lower, preferably the upper edge of the base surface (BF).
    [10]
    10. Lighting unit according to one of claims 1 to 9, characterized in that the at least one light source is lower than the focal line region (4), and the light emitted by the at least one light source is directed upwards to the reflector (2) down in the direction of the focal line area (4) to be reflected.
    [11]
    11. Lighting unit according to one of claims 1 to 9, characterized in that the at least one light source is higher than the focal line region (4), and the outgoing light from the at least one light source is passed down to the reflector (2) to be reflected above in the direction of the focal line region (4).
    [12]
    12. Lighting unit according to one of claims 1 to 11, characterized in that the reflector (2) is a surface, for example a cylindrical surface, having a parabola as a guideline, wherein the focal line of the reflector is formed for example by a straight line, preferably is substantially parallel to the generatrices of the cylinder.
    [13]
    13. Lighting unit according to one of claims 1 to 12, characterized in that the outer surface (3a) of the exit lens (3) is curved in the vertical direction outwards, and preferably in the horizontal direction is rectilinear, and for example, by a cylindrical surface with a straight cross-section along an outwardly convex curve is formed.
    [14]
    14. Lighting unit according to claim 12 and 13, characterized in that the cylindrical surface of the outer surface (3a) comprises generatrices which are substantially parallel to the generatrix of the reflector.
    [15]
    15. Lighting unit according to one of claims 1 to 14, characterized in that a plurality of light sources (1, la, lb) side by side, for example in the direction of a generatrix of the reflector (2), are adjacent.
    [16]
    16. Lighting unit according to one of claims 1 to 15, characterized in that the at least one light source (1, la, lb) comprises a light emitting diode or a plurality of light emitting diodes.
    [17]
    17. Motor vehicle headlight with at least one lighting unit according to one of claims 1 to 16.
    类似技术:
    公开号 | 公开日 | 专利标题
    AT518109B1|2017-11-15|Lighting unit for a motor vehicle headlight for generating a light beam with cut-off line
    EP2771613B1|2021-04-07|Lighting module for a motor vehicle
    AT513738B1|2014-07-15|Lighting unit for a headlight
    EP2893249B1|2016-10-12|Lighting unit for a headlight
    EP3449178B1|2020-04-08|Lighting device for a vehicle headlamp with a light pattern having a dark-light-boundary
    EP3500794B1|2021-11-10|Lighting module for a vehicle headlamp creating at least two light distributions
    EP3042118B1|2017-11-22|Lighting device of a motor vehicle headlight with an optical structure
    AT513816B1|2015-11-15|Light guide unit for a lighting unit of a headlamp and lighting unit and headlamp
    EP3112215B1|2021-03-10|Light guidance device for creating at least one illumination function and/or signaling function of a head lamp of a vehicle
    EP3063463A1|2016-09-07|Lighting device for a motor vehicle headlight
    DE102008036845A1|2010-02-18|Lighting device for use as torch lights and headlamps, has light source and lens for bundling light delivered by light source, where light source is made up of light emitting diode array
    EP3091273B1|2020-11-11|Optical structure for light sign
    DE2923316C2|1983-11-10|Motor vehicle headlights with a ribbed lens and process for their manufacture
    AT517413B1|2018-07-15|Optical fiber arrangement for generating at least one illumination function and / or signaling function of a motor vehicle headlight
    EP3356728B1|2019-06-26|Lighting device for a motor vehicle headlight
    EP3671016A1|2020-06-24|Lighting device for a motor vehicle headlamp and motor vehicle headlamp
    EP3571437B1|2022-03-09|Lighting device for a motor vehicle headlight
    EP3653926B1|2022-02-16|Lighting device for a motor vehicle headlamp and motor vehicle headlamp
    DE3103175A1|1981-12-24|Reverse light for motor vehicles
    EP3550205A1|2019-10-09|Light conductor for a motor vehicle light module
    AT505529A1|2009-02-15|OPTIC ELEMENT FOR LIGHTING A VEHICLE LABEL
    同族专利:
    公开号 | 公开日
    EP3403021A1|2018-11-21|
    KR102145335B1|2020-08-19|
    CN108474534A|2018-08-31|
    EP3403021B1|2021-10-27|
    KR20180103962A|2018-09-19|
    WO2017120630A1|2017-07-20|
    AT518109B1|2017-11-15|
    CN108474534B|2021-11-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2013014046A1|2011-07-25|2013-01-31|Osram Ag|A light source, for example for lighting surfaces|
    WO2014114309A1|2013-01-23|2014-07-31|Docter Optics Se|Vehicle headlamp|
    FR3010772A1|2013-07-25|2015-03-20|Valeo Vision|LIGHT EMITTING DEVICE FOR MOTOR VEHICLE PROJECTOR|EP3453951A1|2017-09-07|2019-03-13|T.Y.C. Brother Industrial Co., Ltd.|Lamp lens|FR2432678B1|1978-03-10|1981-02-06|Cibie Projecteurs|
    FR2884899B1|2005-04-21|2007-06-15|Valeo Vision Sa|LIGHTING MODULE PROVIDING A LUMINOUS BEAM WITH CUT FOR A MOTOR VEHICLE PROJECTOR, AND PROJECTOR COMPRISING SUCH A MODULE|
    DE102006007450B4|2006-02-17|2016-10-06|Automotive Lighting Reutlingen Gmbh|Lighting device in a vehicle|
    FR2913095B1|2007-02-28|2013-07-05|Valeo Vision|PROJECTOR FOR MOTOR VEHICLE|
    JP5279329B2|2008-04-24|2013-09-04|パナソニック株式会社|Light-emitting unit with lens|
    EP2797772B1|2011-12-29|2020-12-02|ZKW Group GmbH|Safety device for headlights with laser light sources and method for shutting down laser light sources in case of safety-critical conditions|
    JP5950385B2|2012-01-25|2016-07-13|株式会社小糸製作所|Vehicle headlamp|
    AT514405B1|2013-06-07|2015-05-15|Zkw Slovakia S R O|Lighting fixture for a vehicle|
    JP6131724B2|2013-06-11|2017-05-24|スタンレー電気株式会社|Vehicle lighting|
    DE102013212352A1|2013-06-26|2014-12-31|Automotive Lighting Reutlingen Gmbh|Automotive lighting device with a Einkoppeloptik and a transport and forming optics|AT521381B1|2018-07-19|2020-01-15|Pro Aqua Diamantelektroden Produktion Gmbh & Co Kg|Method and device for carrying out gas scrubbing using an electrolyte solution|
    FR3086735B1|2018-09-28|2021-06-25|Valeo Vision|MONOBLOC OPTICAL PART IN TRANSPARENT OR TRANSLUCENT MATERIAL WITH INACTIVE SURFACE WITH DIFFUSING PORTION|
    EP3653926B1|2018-11-19|2022-02-16|ZKW Group GmbH|Lighting device for a motor vehicle headlamp and motor vehicle headlamp|
    CN212584877U|2020-01-02|2021-02-23|法雷奥照明公司|Light guide member, lighting device, and vehicle|
    CN212132313U|2020-03-09|2020-12-11|华域视觉科技有限公司|Car light optical element subassembly, vehicle lighting device, car light and vehicle|
    CN212746315U|2020-07-02|2021-03-19|华域视觉科技有限公司|Lens unit, auxiliary low-beam module, lens, low-beam lighting module and vehicle|
    CN113028355B|2021-03-23|2022-01-07|华域视觉科技有限公司|Car light optical assembly, illumination optical device and vehicle|
    CN113091014B|2021-04-06|2022-02-22|华域视觉科技有限公司|Car light optical element, car light module and vehicle|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50015/2016A|AT518109B1|2016-01-14|2016-01-14|Lighting unit for a motor vehicle headlight for generating a light beam with cut-off line|ATA50015/2016A| AT518109B1|2016-01-14|2016-01-14|Lighting unit for a motor vehicle headlight for generating a light beam with cut-off line|
    KR1020187022976A| KR102145335B1|2016-01-14|2017-01-09|Lighting unit for automobile headlights to create bundles of light with cut-off lines|
    PCT/AT2017/060003| WO2017120630A1|2016-01-14|2017-01-09|Lighting unit for a motor vehicle headlight for generating a light bundle with a cutoff line|
    CN201780006801.0A| CN108474534B|2016-01-14|2017-01-09|Lighting unit for a motor vehicle headlight for generating a light beam with a light-dark boundary|
    EP17700768.9A| EP3403021B1|2016-01-14|2017-01-09|Light module for a vehicle headlamp with a dark-light-boundary|
    [返回顶部]