Solid state adaptive headlight
An adaptive light module for incorporation into a vehicle's headlight assembly is provided, where the light module may be incorporated as a single unit, or incorporated as one of a plurality of units. The light module, which uses an LED array, collimating optics, illumination and projection micro-lens-arrays (HLAs), is configured to allow tailoring of the illumination intensity distribution by selectively activating/deactivating subsets of the LED array.
1. An adaptive light module, comprising:
an LED light source, said LED light source comprising an LED array, said LED array comprising a plurality of LEDs;
an illumination micro-lens-array (MLA), wherein a first focal length corresponds to said illumination MLA;
a projection MLA, wherein a second focal length corresponds to said projection MLA, and wherein said first focal length is longer than said second focal length;
at least one collimating optic interposed between said light source and said illumination MLA, said at least one collimating optic configured to collimate light generated by said LED light source prior to said light entering said illumination MLA; and
an aperture layer interposed between said projection MLA and said illumination MLA, said aperture layer configured to provide a cut-off in an illumination field-of-view (FoV) generated by said adaptive light module.
2. The adaptive light module of claim 1 , wherein said plurality of LEDs comprising said LED array is divided into at least a first LED subset and a second LED subset, wherein said illumination MLA and said projection MLA direct light generated by said first LED subset in a first direction and direct light generated by said second LED subset in a second direction, said adaptive light module further comprising a light control system coupled to said LED light source, said light control system configured to selectively and independently activate said first LED subset and said second LED subset.
3. The adaptive light module of claim 1 , further comprising a vehicle and a vehicle headlight assembly, said adaptive light module incorporated into said vehicle headlight assembly.
4. The adaptive light module of claim 1 , wherein said LED array is selected from the group consisting of 1-dimensional LED arrays and 2-dimensional LED arrays.
5. The adaptive light module of claim 1 , wherein said plurality of LEDs comprises said LED array divided into a plurality of LED groups.
6. The adaptive light module of claim 5 , wherein said at least one collimating optic further comprises a plurality of collimating optics, wherein said plurality of collimating optics correspond to said plurality of LED groups.
7. The adaptive light module of claim 6 , wherein a first optical axis of at least one of said plurality of LED groups is displaced relative to a second optical axis of a corresponding collimating optic.
8. The adaptive light module of claim 6 , wherein a first optical axis of at least one of said plurality of LED groups is tilted relative to a second optical axis of a corresponding collimating optic.
9. The adaptive light module of claim 1 , wherein said illumination MLA comprises a plurality of illumination optical elements and wherein said projection MLA comprises a plurality of projection optical elements, wherein said first focal length corresponds to a y-axis of each of said plurality of illumination optical elements and said second focal length corresponds to said y-axis of each of said plurality of projection optical elements, and wherein said y-axis corresponds to a horizontal plane.
10. The adaptive light module of claim 9 , wherein a third focal length corresponds to a z-axis of each of said plurality of illumination optical elements of said illumination MLA, wherein a fourth focal length corresponds to said z-axis of each of said plurality of projection optical elements of said projection MLA, and wherein said z-axis is orthogonal to said y-axis.
11. The adaptive light module of claim 10 , wherein said first focal length is larger than said third focal length.
12. The adaptive light module of claim 9 , wherein a first cross-section corresponding to each of said plurality of illumination optical elements and a second cross-section corresponding to each of said plurality of projection optical elements has a non-regular hexagonal shape.
13. The adaptive light module of claim 12 , wherein a first dimension corresponds to a first width of said non-regular hexagonal shape and a second dimension corresponds to a second width of said non-regular hexagonal shape, and wherein a ratio of said first dimension to said second dimension is between 1.5:1 and 3:1.
14. The adaptive light module of claim 9 , wherein a first cross-section corresponding to each of said plurality of illumination optical elements and a second cross-section corresponding to each of said plurality of projection optical elements has a rectangular shape.
15. The adaptive light module of claim 14 , wherein a first dimension corresponds to a first width of said rectangular shape and a second dimension corresponds to a second width of said rectangular shape, and wherein a ratio of said first dimension to said second dimension is between 1.5:1 and 3:1.
16. The adaptive light module of claim 1 , wherein said aperture layer is applied to a planar side of said illumination MLA.
17. The adaptive light module of claim 16 , wherein said aperture layer is directly deposited onto said planar side of said illumination MLA.
18. The adaptive light module of claim 1 , wherein said aperture layer is applied to a planar side of said projection MLA.
19. The adaptive light module of claim 18 , wherein said aperture layer is directly deposited onto said planar side of said projection MLA.
20. The adaptive light module of claim 1 , wherein a distance between said aperture layer and an outer lens surface of said illumination MLA is less than said first focal length.
21. The adaptive light module of claim 1 , wherein said at least one collimating optic further comprises a plurality of collimating optics, wherein said plurality of collimating optics correspond to said plurality of LEDs comprising said LED array.
22. The adaptive light module of claim 1 , wherein said illumination MLA comprises a plurality of illumination optical elements and wherein said projection MLA comprises a plurality of projection optical elements, wherein said plurality of illumination optical elements are aligned with said plurality of projection optical elements.
23. The adaptive light module of claim 1 , wherein said illumination MLA comprises a plurality of illumination optical elements and wherein said projection MLA comprises a plurality of projection optical elements, wherein a first dimension corresponds to a cross-section height corresponding to each of said plurality of illumination optical elements and a second dimension corresponds to a cross-section width corresponding to each of said plurality of illumination optical elements, wherein said plurality of illumination optical elements are not aligned with said plurality of projection optical elements, and wherein said plurality of projection optical elements are displaced from said plurality of illumination optical elements by less than 25 percent of said first dimension.