Lighting apparatus for a motor vehicle headlamp

Abstract

A lighting device (10) for a motor vehicle headlamp, which lighting device comprises the following: at least one first light source (50) for radiating light beams in a first radiation direction (X1), a first deflection device (100) with a deflection surface (110), which is set up to deflect at least a portion of the light beams of the at least one first light source (50) in a second radiation direction (X2), and a second deflection device (200) with a multiplicity of deflection elements which can be controlled and moved independently of one another for deflecting at least a portion of the light beams of the light beams deflected by the first deflection device (100) in a third radiation direction (X3) and for creating a light distribution in front of the lighting device (10), wherein the first deflection device (100) comprises at least one second light source (60), which at least one second light source (60) has a main radiation direction in which light beams of the second light source can be emitted, wherein the at least one second light source (60) is arranged on the deflection surface (110) of the first deflection device (100) in such a manner that the main radiation direction is parallel to the second radiation direction (X2).

Claims

1. A lighting device (10) for a motor vehicle headlamp, the lighting device comprising: at least one first light source (50) for radiating light beams in a first radiation direction (X1); a first deflection device (100) with a deflection surface (110), which is configured to deflect at least a portion of the light beams of the at least one first light source (50) in a second radiation direction (X2); and a second deflection device (200) with a plurality of deflection elements which can be controlled and moved independently of one another for deflecting at least a portion of the light beams of the light beams deflected by the first deflection device (100) in a third radiation direction (X3) and for creating a light distribution in front of the lighting device (10), wherein the first deflection device (100) comprises at least one second light source (60), which at least one second light source (60) has a main radiation direction in which light beams of the second light source can be emitted, wherein the at least one second light source (60) is arranged on the deflection surface (110) of the first deflection device (100) in such a manner that the main radiation direction is parallel to the second radiation direction (X2), wherein the first deflection device (100) has a holder (130), on which the deflection surface (110) is arranged, wherein the holder (130) has an opening (140), in which the at least one second light source (60) is arranged.

2. A lighting device (10) for a motor vehicle headlamp, the lighting device comprising: at least one first light source (50) for radiating light beams in a first radiation direction (X1); a first deflection device (100) with a deflection surface (110), which is configured to deflect at least a portion of the light beams of the at least one first light source (50) in a second radiation direction (X2); and a second deflection device (200) with a plurality of deflection elements which can be controlled and moved independently of one another for deflecting at least a portion of the light beams of the light beams deflected by the first deflection device (100) in a third radiation direction (X3) and for creating a light distribution in front of the lighting device (10), wherein the first deflection device (100) comprises at least one second light source (60), which at least one second light source (60) has a main radiation direction in which light beams of the second light source can be emitted, wherein the at least one second light source (60) is arranged on the deflection surface (110) of the first deflection device (100) in such a manner that the main radiation direction is parallel to the second radiation direction (X2), and wherein the at least one second light source (60) is arranged at the geometric centre of the deflection surface (110) of the first deflection device (100), wherein the deflection surface (110) has a recess (120) for the at least one second light source (60).

3. The lighting device according to claim 1, wherein the holder (130) is constructed and configured as a heat sink to dissipate heat created at the at least one second light source (60).

4. The lighting device according to claim 1, wherein the first deflection device (100) has exactly one second light source (60).

5. A lighting device (10) for a motor vehicle headlamp, the lighting device comprising: at least one first light source (50) for radiating light beams in a first radiation direction (X1); a first deflection device (100) with a deflection surface (110), which is configured to deflect at least a portion of the light beams of the at least one first light source (50) in a second radiation direction (X2); and a second deflection device (200) with a plurality of deflection elements which can be controlled and moved independently of one another for deflecting at least a portion of the light beams of the light beams deflected by the first deflection device (100) in a third radiation direction (X3) and for creating a light distribution in front of the lighting device (10), wherein the first deflection device (100) comprises at least one second light source (60), which at least one second light source (60) has a main radiation direction in which light beams of the second light source can be emitted, wherein the at least one second light source (60) is arranged on the deflection surface (110) of the first deflection device (100) in such a manner that the main radiation direction is parallel to the second radiation direction (X2), and wherein the at least one second light source (60) is constructed as a light-emitting diode or as a laser light source with a light conversion means.

6. A lighting device (10) for a motor vehicle headlamp, the lighting device comprising: at least one first light source (50) for radiating light beams in a first radiation direction (X1); a first deflection device (100) with a deflection surface (110), which is configured to deflect at least a portion of the light beams of the at least one first light source (50) in a second radiation direction (X2); and a second deflection device (200) with a plurality of deflection elements which can be controlled and moved independently of one another for deflecting at least a portion of the light beams of the light beams deflected by the first deflection device (100) in a third radiation direction (X3) and for creating a light distribution in front of the lighting device (10), wherein the first deflection device (100) comprises at least one second light source (60), which at least one second light source (60) has a main radiation direction in which light beams of the second light source can be emitted, wherein the at least one second light source (60) is arranged on the deflection surface (110) of the first deflection device (100) in such a manner that the main radiation direction is parallel to the second radiation direction (X2), and wherein the at least one second light source (60) has an adapter optical element (61), which adapter optical element (61) is constructed as a collimator.

7. The lighting device according to claim 1, wherein an adapter optical element (51) is connected downstream of the at least one first light source (50), which adapter optical element (51) is constructed as a collimator.

8. The lighting device according to claim 1, wherein the second deflection device (200) is constructed as a digital micromirror array with a multiplicity of micromirrors which are arranged next to one another in an array-like manner and can be controlled individually or in groups.

9. The lighting device according to claim 1, wherein the at least one first light source (50) is constructed as at least one light-emitting diode.

10. The lighting device according to claim 1, wherein the lighting device (10) comprises at least two first light sources (50).

11. The lighting device according to claim 1, wherein the first radiation direction (X1) is parallel to the third radiation direction (X3).

12. A lighting device (10) for a motor vehicle headlamp, the lighting device comprising: at least one first light source (50) for radiating light beams in a first radiation direction (X1); a first deflection device (100) with a deflection surface (110), which is configured to deflect at least a portion of the light beams of the at least one first light source (50) in a second radiation direction (X2); and a second deflection device (200) with a plurality of deflection elements which can be controlled and moved independently of one another for deflecting at least a portion of the light beams of the light beams deflected by the first deflection device (100) in a third radiation direction (X3) and for creating a light distribution in front of the lighting device (10), wherein the first deflection device (100) comprises at least one second light source (60), which at least one second light source (60) has a main radiation direction in which light beams of the second light source can be emitted, wherein the at least one second light source (60) is arranged on the deflection surface (110) of the first deflection device (100) in such a manner that the main radiation direction is parallel to the second radiation direction (X2), and wherein the deflection surface (110) of the first deflection device (100) is constructed as a hyperbolic or parabolic reflector.

13. The lighting device according to claim 1, wherein the first deflection device (100) is configured to bundle light beams of the at least one first light source (50) to a point, which is located in the direction of the second radiation direction (X2) behind the second deflection device (200).

14. A motor vehicle headlamp having at least one lighting device according to claim 1.

15. The lighting device according to claim 10, wherein the lighting device (10) comprises exactly two first light sources (50).

Description

(1) In the figures

(2) FIG. 1 shows a perspective view of an exemplary lighting device having first light sources, a first deflection device having a second light source and a second deflection device;

(3) FIG. 2 shows the exemplary lighting device from FIG. 1 in a different perspective;

(4) FIG. 3 shows a section through the first deflection device;

(5) FIG. 4 shows a perspective front view of the first deflection device; and

(6) FIG. 5 shows a perspective rear view of the first deflection device.

(7) FIG. 1 shows an exemplary lighting device 10 for a motor vehicle headlamp, which lighting device 10 comprises two first light sources 50, which are provided for radiating light beams in a first radiation direction X1 and are constructed as light-emitting diodes, and a first deflection device 100 with a deflection surface 110, which deflection surface 110 is set up to deflect at least a portion of the light beams of the first light sources 50 in a second radiation direction X2. The first deflection device 100 further comprises a holder 130, on which holder 130 the deflection surface 110 is arranged or fastened.

(8) An adapter optical element 51 is in each case connected downstream of the first light sources 50, which adapter optical elements 51 are constructed as collimators and align the light beams emitted by the light sources 50 parallel to one another, wherein the parallel directed light beams are radiated onto the first deflection device 100 or onto the deflection surface 110.

(9) The lighting device 10 further comprises a second deflection device 200, which is constructed as a digital micromirror array (DMD for short) with a multiplicity of micromirrors which are arranged next to one another in an array-like manner and can be controlled individually or in groups, wherein the micromirrors can be controlled and moved independently of one another, and wherein the micromirror is provided for deflecting at least a portion of the light beams of the light beams deflected by the first deflection device 100 in a third radiation direction X3 and for creating a light distribution in front of the lighting device 10.

(10) Here, the angle of each micromirror can be adjusted individually and generally has two stable end states, between which it can be tilted.

(11) The first radiation direction X1 may be arranged parallel to the third radiation direction X3, as can be seen in the example shown in FIGS. 1 and 2.

(12) FIG. 3 shows a detailed sectional view of the first deflection device 100, wherein it can be seen that the first deflection device 100 comprises a second light source 60, which has a main radiation direction A, in which light beams of the second light source 60 can be emitted, wherein the second light source 60 is arranged at the geometric centre of the deflection surface 110. The holder 130 has an opening 140 for this, in which the second light source 60 is arranged, wherein the deflection surface 110 has a recess 120 for the second light source 60, so that the light beams that can be emitted by the second light source 60 can be radiated onto the second deflection device 200 in the direction of the second radiation direction X2. The main radiation direction A of the second light source 60 is in this case arranged parallel to the second radiation direction X2 or the second light source 60 radiates substantially in the same direction in which the light beams of the first light sources 50 are deflected by the first deflection device 100.

(13) Geometric centre is for example also understood to mean the geometric centre of gravity. Mathematically, this corresponds to the averaging of all points inside a figure, in this case a surface. Such surfaces may for example also be constructed as quadrics, that is to say second order surfaces.

(14) The deflection surface 110 can for example be constructed as a parabolic or as a hyperbolic reflector or reflector surface.

(15) The geometric centre can here also be understood to mean the point on a paraboloid (or hyperboloid) at which the axis of rotation, about which a parabola (or hyperbola) is rotated in order to create a paraboloid (or hyperboloid), intersects the paraboloid surface (hyperboloid surface).

(16) The deflection surface 110 or the first deflection device 100 can also be constructed in such a manner that the light beams of the first light sources are bundled substantially to a point, which point is located in the direction of the second radiation direction X2 behind the second deflection device 200.

(17) This point may also be understood to mean a region with spatial extent, wherein this generally means that the parallel directed light beams of one of the first light sources 50 intersect the parallel directed light beams of the other first light source 50 in a point or region.

(18) The second light source 60 is constructed in the example shown in the figures as a laser light source with a light conversion element, wherein an adapter optical element 61, which is constructed as a collimator, is connected downstream of the second light source 60 in the main radiation direction A.

(19) FIG. 4 shows a perspective front view of the first deflection device 100, wherein once again the deflection surface 110 and the recess 120 provided on the deflection surface 110 can be seen.

(20) FIG. 5 shows a perspective rear view of the first deflection device 100, wherein the holder 130 can be seen more clearly, wherein the holder 130 is constructed as a heat sink, which heat sink is set up to dissipate the heat created at the second light source 60, preferably to the surroundings.

LIST OF REFERENCE NUMBERS

(21) Lighting device . . . 10 First light source . . . 50 Adapter optical element, first light source . . . 51 Second light source . . . 60 Adapter optical element, second light source . . . 61 First deflection device . . . 100 Deflection surface . . . 110 Recess, deflection surface . . . 120 Holder . . . 130 Opening, holder . . . 140 Second deflection device . . . 200 First radiation direction . . . X1 Second radiation direction . . . X2 Third radiation direction . . . X3 Main radiation direction . . . A