Luminaire for automobile

Abstract

To provide a luminaire including a light guide body.SOLUTION: A luminaire 1 for automobile includes a light source 10, and a transparent light guide body 100. The light guide body has a first light deflection surface 102 on an upper side 1100, a second light deflection surface 103 and a light emitting surface 104 on the lower side 1200, and has an edge part 105 extending in the lateral direction with respect to a light propagation direction Y1. The light from the light source 10 passes the edge part 105, and is deflected to the light emitting surface 104 via the second light deflection surface 103 from the first light deflection surface 102. A first crossing curve line K102 which a cross section of the first light deflection surface 102 forms has a shape of a hyperbola branch, and the focal point exists in the region outside the light guide body 100. A second crossing curve line K103 which a cross section of the second deflection surface forms has a shape of a convex curve surface parabola, and the focal point coincides with the focal point of the first crossing curve line K102. A full focus F200 of a deflection system 200 is arranged in the region of the edge part 105, and projects the light from the light source 10 as light distribution by a cut-off line.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lighting device for an electric vehicle, the lighting device comprising: a light source configured to emit light; a transparent light guide configured to project light emitted from the light source as a light distribution; and a light coupling region configured to couple the light emitted by the light source into the light guide, wherein the light guide has a first light deflection surface on its upper side, a second light deflection surface on its lower side, and a light emitting surface, and the light coupled at the light source and coupled into the light guide via the light coupling region propagates in a first light propagation direction as a first light beam, and the light guide has, for example, an edge on its lower side extending laterally to the first light propagation direction, and after the edge, has a second light propagation direction in the first light propagation direction as a second light beam, and a second light propagation direction having the same direction as the first light propagation direction, and the second light beam is deflected from the first light deflection surface to the second light deflection surface, deflected from the second light deflection surface to the light emitting surface as a fourth light beam, and emitted via the light emitting surface as a fifth light beam and projected as a light distribution into a forward region. [Background technology]

[0002] Illumination devices for use in automobiles or automobile headlamps to generate a light distribution are known in the art. Typically, a light source emits light that is coupled into an optical body, such as a light guide. Such a light guide is, for example, a body made of an optically transparent material through which the coupled light propagates to an emitting surface, emerges from the light guide via the emitting surface, and is emitted in front of the illumination device, in particular in front of the automobile headlamp or in an area in front of the automobile, where the light distribution is projected (i.e., generated or imaged).

[0003] Shading elements are often provided in the light propagation path, which shade part of the coupled light so that, if the shading element is properly positioned, its edges "project" or appear as a cutoff line that limits the light distribution. For example, a dipped beam distribution can be created in this way.

[0004] Shading elements are often designed as edges of a light guide that run across the light propagation path.

[0005] To project the light exiting the light guide as a light distribution, a projection lens is often placed adjacent to the light guide's light-emitting surface to project (i.e., image) the exiting light as a light distribution. The projection lens is usually placed away from the light-emitting surface.

[0006] A drawback of such a design is that optical errors, especially chromatic errors, arise due to emittance from the optical body into other media, especially air, and re-entry into the projection lens, where these re-entries are reflected as undesirable optical effects in the light image.

[0007] It is also possible for the light-emitting surface to be curved in order to perform the function of a projection lens, in which case the light does not emerge from a light guide, however, for design reasons vehicle manufacturers increasingly prefer the light-emitting surface of such lighting devices to be flat. Summary of the Invention [Problem to be solved by the invention]

[0008] SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting device with a light guide in which the above-mentioned disadvantages are reduced or eliminated.

[0009] This object is solved according to the invention by an illumination device as described above, in which in one or more sections through the light guide along one or more vertical cross sections extending parallel to the first light propagation direction or parallel to the perpendicular longitudinal central plane, the first light deflection surface forms a first intersection curve in the cross section plane or planes and the second light deflection surface forms a second intersection curve.

[0010] The first intersecting curve is convexly or concavely curved and has the shape of a branch of a hyperbola, the focus of which is outside the light guide and in a region of the light guide opposite the second light deflection surface.

[0011] the second intersection curve is convexly curved and has the shape of a parabola with a focal point, the focal point of the parabola coinciding with the focal point of the first intersection curve outside the light guide in a region of the light guide away from the second light deflection surface, and the deflection system consisting of the first light deflection surface and the second light deflection surface is arranged in a cross-sectional plane or in a planar manner at the edge or in the region of the edge so that the total focal point of the deflection system formed by the first light deflection surface and the second light deflection surface projects the light beam emitted from the light source as a light distribution with a cut-off line that limits the light distribution, in particular upwards, and the shape and / or position of the cut-off line, in particular the shape and / or position of the cut-off line, is determined by the edge, and the light emitting surface is planar.

[0012] The term "light propagation direction" refers to the resulting direction of the rays of the respective light beam under consideration.

[0013] According to the present invention, two light deflection surfaces act like projection lenses to generate the projection of the desired light image, thereby making the light exit surface of the light guide flat. This is because the imaging function is realized only by the two light deflection surfaces (=imaging system, projection system). Projection is also realized by two reflections, and since refractive edges are formed in the light guide or limit the light guide, but not outside, refractive optics can therefore be avoided in the imaging system. Therefore, in the lighting device according to the present invention, color effects (chromatic aberrations) can be avoided at the same time using a flat light-emitting surface.

[0014] Further advantageous embodiments of the lighting device are described in the dependent claims.

[0015] It may be provided that the edge comprises one or more straight sections, for example in the case of two or more straight sections, these being arranged offset from one another in one direction, in particular vertically.

[0016] A straight line design is easy to implement and offset sections can be used to achieve asymmetry of the cut-off line in the generated light distribution.

[0017] Preferably, the edge is curved, and preferably the edge is on, in contact with or close to the Petzval surface of the deflection system.

[0018] In this context, the edge comprises one or more parts, and in the case of two or more parts, these parts are arranged offset from one another in one direction, in particular vertically, again to achieve an asymmetric cut-off line in the light distribution, which can provide for upward limitation.

[0019] It may be provided that the first intersection curve and / or the second intersection curve have the same shape in parallel perpendicular cross sections.

[0020] In other words, the curvature of the first intersection curve always looks the same over some spaced interval, as does the curvature of the second intersection curve. The first and second light deflection surfaces or light guides in this area are therefore (mathematically) extruded from the first and second intersection curves of the vertical cross section.

[0021] However, it may also be provided that in the parallel vertical cross-sections the first and / or second intersection curves have different shapes, in particular different curvatures, e.g. the first and second light deflection surfaces are formed by rotation of the first and second intersection curves, respectively, around their respective axes of symmetry.

[0022] For example, a vertical intersection curve corresponding to the longitudinal center plane is assumed, and the first and second intersection curves rotate around their respective hyperbolic or parabolic symmetry axes (the connection between the two foci of a hyperbola) or (the connection between the foci and the vertex of a parabola).

[0023] It may be provided that the light coupling region is configured, for example, in the form of a collimator, such that the light beam emitted by the light source is substantially aligned in the light guide in the first light propagation direction, in particular such that the first light beam is bundled in a region above the edge.

[0024] Thus, the desired alignment of the light beams coupled into the light guide is achieved by the design of the light coupling region.

[0025] The combined light then travels in a first light propagation direction, whereby these light beams are preferably bunched, i.e., converged, toward the edge. In an ideal point-shaped light source, the light beams would be converged into the edge or into a point located on or near the edge. However, in reality, due to the expansion of the light source, the light rays also travel past the edge at a distance above the edge. In the light distribution, these upward-passing light rays illuminate the lower or lower region of the light distribution. The further the light rays travel beyond the edge, the higher they become in the light image. The edge can be recognized as a cutoff line in the light image, limiting the light image toward the top. Because the light beam S1 is bunched and essentially directed toward the edge, the light distribution is brightest in the area of ​​the cutoff line, where the highest illuminance values ​​occur.

[0026] Preferably, the light coupling region and the light guide are integrally connected to one another and are formed from the same material.

[0027] Cushion optics can be provided on the planar emitting surface to homogenize the light emerging from the light guide.

[0028] Furthermore, as mentioned above, the problem is solved in a lighting system comprising two or more lighting devices according to the present invention.

[0029] For example, it is provided that two or more lighting devices are arranged laterally next to each other, where, for example, the first light propagation directions in the light guide are aligned parallel to each other or inclined at an angle to each other.

[0030] The illuminators each together generate a light distribution which then together form the resulting overall light distribution, for example a dipped beam light distribution.

[0031] The light sources are preferably arranged in a row, in particular side by side laterally, in particular perpendicular to the first overall light propagation direction (=obtained from the individual first light propagation directions).

[0032] In such a lighting system, the light guides of the lighting devices are preferably integrally connected to one another.

[0033] It may be provided that the light guides are, for example, open in their light emitting surfaces or form a common, preferably planar, light emitting system, the system light emitting surface extending perpendicularly or obliquely to the longitudinal central plane of one of the light guides, at an angle not equal to 0° relative to this longitudinal central plane, in particular a horizontal angle.

[0034] For example, the light emitting surface leads to a light guide, in particular a transparent body that is located in front of the light emitting surface and is preferably disposed integrally (i.e., unitarily) with the light guide and includes a system light emitting surface opposite the light emitting surface.

[0035] Furthermore, the invention relates to a headlamp, in particular a motor vehicle headlamp, comprising one or more lighting devices as described above and / or one or more lighting systems as described above.

[0036] Finally, the present invention also relates to a vehicle, in particular a motor vehicle, wherein the vehicle has one or more lighting devices as described above and / or one or more lighting systems as described above and / or one or more headlamps as described above.

[0037] The invention will be explained in more detail below with reference to exemplary drawings. [Brief explanation of the drawings]

[0038] [Figure 1] FIG. 1 shows a vertical cross section of a lighting device according to the invention. [Figure 1a] FIG. 1a shows the lighting device of FIG. 1 with emphasis on geometrical aspects. [Figure 1b] FIG. 1b shows a modification of the lighting device of FIG. 1 or FIG. 1a, similar to FIG. 1a. [Figure 2] FIG. 2 is a perspective view of the lighting device of FIG. 1 or a lighting device having a similar configuration, viewed obliquely from the bottom side. [Figure 3] FIG. 3 is a perspective view showing a lighting system made up of five lighting devices having the same configuration as the lighting device of FIG. 1, viewed from the top side. [Figure 4] FIG. 4 shows a top view of the lighting system of FIG. [Figure 5] FIG. 5 shows a top view of a variation of the lighting system of FIG. [Figure 6] FIG. 6 is a perspective view from above of an example in which a cushion optical system is provided on the light exit surface of the entire system in the illumination system of FIG. [Figure 7] FIG. 7 shows a schematic light distribution (LV1) produced by the lighting device of FIG. 1 or a single lighting device of the lighting system of FIGS. [Figure 8] Figure 8 shows a schematic representation of an overall light distribution (LV) produced by a lighting system such as those of Figures 3, 5 and 6. Figure 1 shows a lighting device 1 in vertical section, which comprises a light source 10 configured to emit light. Furthermore, the lighting device 1 comprises a transparent light guide 100 configured to project (i.e., image) the light emitted by the light source 10 as light distributions LV1 to LV5. A corresponding light distribution LV1 is shown by way of example in Figure 7.

[0039] The light source 10 can be, for example, one or more LEDs, but can also be a more complex arrangement of light emitting elements.

[0040] The light guide 100 is a solid body made of a transparent material, such as Turflon, through which light can propagate in a linear manner.

[0041] The light guide 100 has a light coupling region 101 through which light emitted by the light source 10 is coupled into the light guide 100. The light coupling region 101 may be part of the light guide 100, or the light guide 100 and the light coupling region 101 may form one piece and be made from the same material.

[0042] The light guide 100 has a first light deflection surface 102 on its upper side 1100 , a second light deflection surface 103 on its lower side 1200 , and a light emitting surface 104 .

[0043] The light emitting surface 104 is flat.

[0044] The terms "above" and "below" refer to the proper placement of the lighting device in the automobile.

[0045] Light emitted by the light source 10 and coupled into the light guide 100 via the light coupling region 101 propagates through the light guide 100 as a first light beam (light beam S1) in a first light propagation direction Y1.

[0046] On the underside 1200, the light guide 100 has a transversely running edge 105, typically at an angle of about 90° to the first light propagation direction Y1. The word "about" is intended to express that the edge 105 does not necessarily run in a straight line and may also be, or preferably may be, curved, so that the angle between the edge 105 and the direction Y1 may vary locally.

[0047] The indicated vertical planes Ev or longitudinal sections Ev run perpendicular to the planar light-emitting surface 104 and / or parallel to the first light propagation direction Y1. For example, the vertical planes Ev or longitudinal sections Ev are the longitudinal central planes LEM of the light guide 1. Regarding the designation of parts and surfaces, please also refer to Figures 4 and 5 for an illumination system comprising a plurality of illumination devices according to the invention.

[0048] 1, 1a and 1b show the lighting device 1 in an installed position in a car. In the embodiment shown in these figures, the planar light-emitting surface 104 is perpendicular to the horizontal. In a real situation, there may be an inclination of the light-emitting surface relative to the horizontal, but this does not change the meaning of terms such as "upper", "lower", etc.

[0049] After the edge 105, the light propagates as a second light beam (light beam S2) in a second light propagation direction Y2 to the first light deflection surface 102, the second light propagation direction Y2 being the same as the first light propagation direction Y1.

[0050] The incident light S2 is totally reflected by the first light deflection surface 102 and deflected to the second light deflection surface 103 in the third light propagation direction Y3 as a third light beam (light beam S3). The incident light S3 is totally reflected again by the second light deflection surface 103 and deflected to the light emitting surface 104 as a fourth light beam (light beam S4, fourth light propagation direction Y4). These light beams are emitted from the light guide via the light emitting surface 104 as a fifth light beam (light beam S5, fifth light propagation direction Y5) and are projected as light distributions LV1 to LV5 to an area ahead of the light guide 100 or in front of the vehicle.

[0051] The edge 105 (also called the "open edge") is formed by two surfaces 150, 151 on the underside 1200 of the light guide 100, delimiting it to the outside (the "interface"), whereby the two interfaces 150, 151 converge at the edge 105. In the example shown, the surface 151 passes to the second light deflection surface 103 via a further interface 152, although the transition could also occur directly; this region is secondary or irrelevant to the mode of operation and will not be discussed in further detail at this point.

[0052] Also shown in the front region of the upper side 1100 of the light guide 100 is an interface 154, which will not be described in detail as it is incidental or irrelevant to the function of the present invention.

[0053] Looking at the vertical section from FIG. 1, in this section, the first light deflection surface 102 forms a first intersection curve K102 and the second light deflection surface 103 forms a second intersection curve K103, running parallel to the first light propagation direction Y1 through the light guide body 100.

[0054] In this example, the first intersecting curve K102 is concave and has the shape of a branch of a hyperbola, with a focus F102 of this hyperbola located outside the light guide 100 in a region facing away from the second light deflection surface 103 of the light guide 100, referring to Figure 1a.

[0055] The second intersecting curve K103 is convexly curved and has the shape of a parabola with a focus F103, which coincides with the focus F102 of the first intersecting curve K102 that is outside the light guide body 100 in a region of the light guide body 100 facing away from the second light deflection surface 103.

[0056] The second intersection curve K103 has a convex curved surface when viewed from the light guide 100. From the perspective of a light ray propagating through the light guide 100, the second intersection curve K103 has a concave curvature, i.e., this (total reflection) surface or the first intersection curve K102 acts like a concave mirror for the light ray.

[0057] 1 and 1a, the first intersecting curve K102 is concave. However, from the perspective of a light ray traveling through the light guide 100, the concave first intersecting curve K102 appears convex.

[0058] The second focus F103' of the hyperbola forms the total focus F200 of the deflection system 200 formed by the first intersection curve K102 and the second intersection curve K103 in the cross section shown. The total focus F200 can be located either in the region of the edge 105, on the edge or above the edge 105 of the light guide 100, or outside the light guide 100, in particular slightly below the edge 105, as shown diagrammatically.

[0059] The deflection system 200, consisting of the first light deflection surface 102 and the second light deflection surface 103, projects the light beam emitted by the light source 10 as light distributions LV1 to LV5. Due to the fact that the edge 105 is located at or near the focal point F200 of the overall system, the edge 105 is depicted in the light distribution as a sharp cutoff line HDG that limits the light distributions LV1 to LV5 upward. The shape of the edge 105 determines the shape of the cutoff line HDG.

[0060] 1a also shows the axis of symmetry SA102 of the hyperbola and the axis of symmetry SA103 of the parabola. The axis of symmetry SA102 of the hyperbola passes through the two foci F103, F103' (=F200) of the hyperbola.

[0061] In particular, the focal point F103' / F200 is in the focal plane or Petzval plane of the deflection or imaging system 200.

[0062] The axis of symmetry SA103 of the parabola intersects with the focus F103 of the hyperbola. The axis of symmetry SA103 can run parallel to the light emission direction (main light emission direction) of the light source.

[0063] The deflection or imaging system 200 therefore forms a positive or converging lens.

[0064] The term "light propagation direction" refers to the resulting direction of the rays of the respective light beam under consideration.

[0065] The edge 105 may comprise one or more straight sections, for example, in the case of two or more straight sections, which may be provided to be arranged offset from one another in one direction, in particular vertically. Usually, the edge or parts thereof lie in a horizontal plane.

[0066] Preferably, the edge 105 is curved, and the edge is preferably at the Petzval plane of the deflection system 200, and it may be provided that the edge is in contact with the Petzval plane of the deflection system 200 or is located in the vicinity of the Petzval plane.

[0067] The lighting device 1 according to the invention, comprising a light guide 100 similar to or similar to that of FIG. 1, is shown in a perspective view from the rear in FIG. 2. Here, it can be seen that the open edge 105 consists of two vertically offset sections connected to each other by a further oblique section. In this way, asymmetry in the cut-off line HDG of the light distributions LV1-LV5 can be achieved. Furthermore, FIG. 2 schematically shows the position of the focal point F200 of the deflection system 200.

[0068] The two light deflection surfaces result, for example, from the fact that the first intersection curve and / or the second intersection curve have the same shape in parallel perpendicular cross sections.

[0069] Preferably, however, in parallel vertical cross sections, the first and second intersection curves K102 and K103 have in particular different curvature shapes, and the first and second light deflection surfaces 102 and 103 are formed, for example, in a vertical longitudinal central plane by rotation of the respective symmetry axes SA102, SA103 of the first and second intersection curves K102 and K103 about the respective symmetry axes SA102, SA103, as shown in Figure 1a. Similar considerations also apply to the embodiment according to Figure 1b, which will be discussed further below.

[0070] The light coupling region 101 is preferably a formation of a collimator, in particular a TIR collimator, which aligns the light beam provided from the light source 10 to the light coupling region 101 by total internal reflection. The light coupling region 101 or TIR collimator aligns the light beam in a first light propagation direction Y1. The light beam S1 is preferably bundled in the direction of the open edge 105.

[0071] The combined light then travels in a first light propagation direction Y1, where the light beams S1 are preferably bunched, i.e., converged, toward the edge 105. In an ideal point-shaped light source, the light beams would be focused at the edge or at a point on or near the edge. However, in reality, due to the spatial expansion of the light source 10, the light rays also travel past the edge at a distance above the edge. In the light distribution, these light rays passing upward illuminate the area below the cutoff line HDG or the area below the light distributions LV1-LV5. The further the light rays travel beyond the edge 105, the higher they appear in the light image. The edge 105 can be recognized in the light image as a cutoff line HDG, which limits the light image toward the top. Because the light beams S1 are bunched and essentially directed toward the edge, the light distribution is brightest in the area of ​​the cutoff line, where the highest illuminance values ​​occur.

[0072] Figure 1b shows a lighting device 1 similar to Figures 1 and 1a. The embodiment from Figure 1b differs in that the first intersecting curve K102, in this example convexly curved, still has the shape of a branch of a hyperbola. The focus F102 of this hyperbola is again located outside the light guide 100, in a region facing away from the second light deflection surface 103 of the light guide 100. Other relationships are similar to Figure 1(a), which is why they will not be discussed in detail here.

[0073] The main difference between the embodiments is that in the embodiment shown in Figure 1 / 1a the size of the intermediate image formed at the focal point F103 is reduced, whereas in the embodiment shown in Figure 1b it is enlarged.

[0074] 3 and 4 show an illumination system 1000 comprising five illumination devices 1 according to the present invention, arranged side by side and integrally connected to one another (i.e., connected as one). Each illumination device has a vertical plane Ev or longitudinal cross section Ev; they can run parallel to one another, but are preferably arranged obliquely to one another, as viewed in the first light propagation direction Y1, so that their longitudinal cross section planes intersect in front of the illumination system 1000. Due to the inclination of their respective longitudinal central planes LEM and the vertical planes Ev or longitudinal cross sections Ev relative to one another, the light distributions LV1 to LV5 are laterally offset from one another, as shown in FIG. 8, thereby achieving the desired width of the light image. Adjacent light distributions preferably overlap.

[0075] In this way, the illuminators each generate light distributions LV1-LV5, which together form a resulting overall light distribution LV, e.g., a dipped beam light distribution LV, as shown schematically in Figure 8.

[0076] The light sources 10 can be arranged in a row, in particular side by side.

[0077] The light guides 100, and in particular their light emitting surfaces 104, open into a common, preferably planar, system light emitting surface 1410. In the example shown, the system light emitting surface 1410 is perpendicular to the longitudinal center plane LEM of one of the central light guides 100 in particular.

[0078] 5 and 6 show an essentially similar illumination system 1000, but in this case the system light emitting surface 1410 extends obliquely with respect to the longitudinal central plane LEM at an angle α not equal to 0°.

[0079] As shown, the light emitting surface 104 in both examples preferably opens into an upstream light-conductive, particularly transparent, body 1400 that is integrally formed with the light guide 100 and has a system light emitting surface 1410 opposite the light emitting surface 104.

[0080] In order to homogenize the light emerging from the light guide 100 or from the system light emitting surface 1410, a cushion optic 1420 may be provided on this planar light emitting surface, as shown schematically in Figure 6. Such a cushion optic 1420 is of course not limited to the embodiment according to Figure 6.

[0081] A major advantage of the illumination device or illumination system according to the present invention is that the edge of the deflection system / aperture edge is located inside the light guide: the light coupling area, in particular the TIR collimator, the deflection system and the aperture edge can be integrally formed, i.e. in one piece, thereby eliminating the air gaps that are necessarily present in designs involving lenses.

[0082] This eliminates the need for a projection lens and tooling, significantly reducing manufacturing costs. When using lenses, light must pass through four optical media: once at the source, from air to the TIR collimator material, then from the collimator material to air, then from air to the lens material, and finally from the lens material to air. By removing the lens from the design, half of these transitions are eliminated, which has a positive impact on the efficiency of the design.

Claims

1. A lighting device (1) for a motor vehicle, the lighting device (1) comprising: a light source (10) configured to emit light; a transparent light guide (100) configured to project light emitted from a light source (10) as a light distribution (LV1-LV5); a light coupling region (101) configured to couple light emitted from the light source (10) into the light guide (100); The light guide (100) comprises a light emitting surface (104) having a first light deflection surface (102) on its upper side (1100) and a second light deflection surface (103) on its lower side (1200); The light emitted by the light source (10) and coupled into the light guide (100) via the light coupling region (101) propagates as a first light beam (S1) in the light guide (100) in a first light propagation direction (Y1), and the light guide (100) has an edge (105), for example on its lower side (1200), extending transversely to the first light propagation direction (Y1), the light after passing through the edge portion (105) propagates as a second light beam (S2) in a second light propagation direction (Y2) that is the same direction as the first light propagation direction (Y1) to the first light deflection surface (102), is deflected from the first light deflection surface (102) to the second light deflection surface (103) as a third light beam (S3), is deflected from the second light deflection surface (103) to the light emitting surface (104) as a fourth light beam (S4), is emitted as a fifth light beam (S5) via the light emitting surface (104), and is projected as light distributions (LV1 to LV5) into a front region of the light guide body (100); In one or more longitudinal or vertical planes (Ev) running parallel to a longitudinal central plane (LEM) parallel or perpendicular to the first light propagation direction (Y1), in one or more sections through the light guide (100), the first light deflection surface (102) forms a first intersection curve (K102) in the longitudinal or vertical plane (Ev) and the second light deflection surface (103) forms a second intersection curve (K103), the first intersecting curve (K102) is convexly or concavely curved and has the shape of a branch of a hyperbola, the focus (F102) of the hyperbola being located outside the light guide (100) in a region of the light guide (100) opposite the second light deflection surface (103); the second intersection curve (K103) is a convex curve, has a parabolic shape and has a focal point (F103), the focal point (F103) coincides with the focal point (F102) of the first intersection curve (K102) and is located outside the light guide (100) in a region of the light guide (100) opposite the second light deflection surface (103); The illumination device (1) has a light-emitting surface (104) that is planar, and the total focus (F200) of the deflection system (200) formed by the first and second light deflection surfaces (102 and 103) is arranged in a longitudinal or vertical plane (Ev) at the edge (105) or in the region of the edge (105), and the deflection system (200) consisting of the first and second light deflection surfaces (102 and 103) projects the light beam emitted by the light source (10) as a light distribution (LV1 to LV5), in particular upward, with a cutoff line (HDG) that limits the light distribution (LV1 to LV5), the shape and / or position of the cutoff line (HDG), in particular the cutoff line (HDG), is determined by the edge (105).

2. 2. The lighting device (1) according to claim 1, wherein the edge (105) comprises one or more straight portions, for example in the case of two or more straight portions, these being arranged offset from one another in one direction, in particular in the vertical direction.

3. 2. The illumination device (1) according to claim 1, wherein the edge (105) is curved, and preferably the edge is located at a Petzval surface of the deflection system (200), or is in contact with the Petzval surface of the deflection system (200), or is located close to the Petzval surface.

4. 4. The lighting device (1) according to claim 3, characterized in that the edge (105) comprises one or more parts, and in the case of two or more parts, the parts are arranged offset from one another in one direction, in particular in the vertical direction.

5. 5. The lighting device (1) according to any one of claims 1 to 4, wherein in parallel longitudinal or vertical planes (Ev) the first intersection curve (K102) and / or the second intersection curve (K103) have the same shape.

6. 5. The lighting device (1) according to claim 1, wherein in a parallel longitudinal or vertical plane (Ev), the first intersection curve (K102) and / or the second intersection curve (K103) have in particular different curvatures, for example the first light deflection surface (102) and the second light deflection surface (103) are formed by a rotation of the first intersection curve (K102) and the second intersection curve (K103) around their respective axes of symmetry.

7. 7. The lighting device (1) according to claim 1, wherein the light coupling region (101) is configured, for example, in the form of a collimator, so that the light beams emitted by the light source (10) are substantially aligned in the light guide body (100) in a first light propagation direction (Y1), in particular the first light beam (S1) is bundled in a region above the edge (105).

8. 8. The lighting device (1) according to any one of the preceding claims, wherein the light coupling region (101) and the light guide body (100) are integrally connected to each other and are preferably made of the same material.

9. 9. The lighting device (1) according to any one of the preceding claims, wherein cushion optics are provided on the planar light-emitting surface (104).

10. A lighting system (1000) comprising two or more lighting devices (1) according to any one of claims 1 to 9.

11. 11. The lighting system (1000) of claim 10, wherein the lighting devices (1) are arranged side by side with each other, for example, the first light propagation directions (Y1) of the light guide bodies (100) are parallel to each other or obliquely inclined to each other.

12. 12. The lighting system (1000) according to claim 10 or 11, wherein the light guides (100) of the lighting device (1) are integrally connected to each other.

13. The light guides (100) open or form, for example, from the light emitting surfaces (104) a common, preferably planar, system light emitting surface (1410), which extends perpendicularly or obliquely, at an angle (α), in particular a horizontal angle, to the longitudinal central plane (LEM) of one of the light guides (100), at an angle not equal to 0° relative to this longitudinal central plane (LEM). An illumination system (1000) as described in any one of claims 10 to 12.

14. A headlamp, in particular a motor vehicle headlamp, comprising one or more lighting devices (1) according to any one of claims 1 to 9 and / or comprising one or more lighting systems (1000) according to any one of claims 10 to 13.

15. A vehicle, in particular a motor vehicle, comprising one or more lighting devices (1) according to any one of claims 1 to 9 and / or one or more lighting systems (1000) according to any one of claims 10 to 13 or one or more headlamps according to claim 14.

Images