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 body (100) configured to project light emitted by the light source (10) as a light distribution (LV1-LV5);
- and
- a light coupling region (101) configured to couple light emitted by the light source (10) into the light guide body (100),
- wherein the light guide body (100) has a first light deflection surface (102) on an upper side (1100), a second light deflection surface (103) on a lower side (1200) and a light emitting surface (104),
- wherein light emitted by the light source (10) and coupled into the light guide body (100) via the light coupling region (101) propagates in the light guide body (100) as a first light beam (S1) in a first light propagation direction (Y1), wherein the light guide body (100) has on a lower side (1200) an edge (105) extending transversely to the first light propagation direction (Y1), and
- after the edge (105), the light propagates as a second light beam (S2) to the first light deflection surface (102) in a second light propagation direction (Y2), the second light propagation direction (Y2) having the same direction as the first light propagation direction (Y1), and is deflected from the first light deflection surface (102) as a third light beam (S3) to the second light deflection surface (103) and is deflected from the second light deflection surface (103) as a fourth light beam (S4) to the light emitting surface (104), exits via the light emitting surface (104) as a fifth light beam (S5) and is projected as a light distribution (LV1-LV5) in an area in front of the light guide body (100),
- wherein in one or more sections through the light guide body (100) along one or more vertical sectional planes (Ev) which run parallel to the first light propagation direction (Y1) or parallel to a vertical longitudinal center plane (LEM), the first light deflection surface (102) forms a first intersection curve (K102) in the sectional plane or planes (Ev), and the second light deflection surface (103) forms a second intersection curve (K103),
- wherein the first intersection curve (K102) is convexly or concavely curved and has the shape of a branch of a hyperbola, wherein a focal point (F102) of the hyperbola lies outside the light guide body (100), in a region of the light guide body (100) facing away from the second light deflection surface (103), and
- the second intersection curve (K103) is convexly curved and has the shape of a parabola with a focal point (F103), the focal point (F103) of the parabola coinciding with the focal point (F102) of the first intersection curve (K102) lying outside the light guide body (100) in a region of the light guide body (100) facing away from the second light deflection surface (103),
- wherein the total focal point (F200) of the deflection system (200) formed by the first deflection surface (102) and the second deflection surface (103) is arranged in the sectional plane or planes (Ev) at the edge (105) or in a region of the edge (105) in such a way that the deflection system (200) consisting of the first and second deflection surfaces (101, 102) projects the light beams emitted by the light source (10) as a light distribution (LV1-LV5) with a cut-off line (HDG) which limits the light distribution (LV1-LV5), in particular upwards, wherein the cut-off line (HDG), in particular the shape and/or position of the cut-off line (HDG), is determined by the edge (105), and wherein the light emitting surface (104) is planar.