Microprojection lighting module for a motor vehicle headlight

Patent metadata

Field	Value
Publication number	US-9951919-B2
Application number	US-201415031869-A
Country	US
Kind code	B2
Filing date	Oct 20, 2014
Priority date	Oct 25, 2013
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

The invention relates to a microprojection light module ( 1 ) for a motor vehicle headlight, comprising at least one light source ( 2 ) and at least one projection arrangement ( 3 ), which images the light exiting from the at least one light source ( 2 ) into a region in front of the motor vehicle in the form of at least one light distribution, wherein the projection arrangement ( 3 ) comprises: an entry optics ( 30 ), which consists of an array of micro entry optics ( 31 ); an exit optics ( 40 ), which consists of an array of micro exit optics ( 41 ), wherein each micro entry optics ( 31 ) is paired with exactly one micro exit optics ( 41 ), wherein the micro entry optics ( 31 ) are formed in such a way and/or the micro entry optics ( 31 ) and the micro exit optics ( 41 ) are arranged relative to one another in such a way that the light exiting from a micro entry optics ( 31 ) enters precisely only into the paired micro exit optics ( 41 ), and wherein the light pre-shaped by the micro entry optics ( 31 ) is imaged by the micro exit optics ( 41 ) into a region in front of the motor vehicle as at least one light distribution (LV 1 -LV 5 ; GLV).

First claim

The invention claimed is:

1. A motor vehicle headlight formed as a lighting device or comprising at least one lighting device, the lighting device or the at least one lighting device comprising:
a number of microprojection light modules ( 1 ) each comprising
at least one light source ( 2 ), and
at least one projection arrangement ( 3 ), which images light exiting from the at least one light source ( 2 ) into a region in front of the motor vehicle in the form of at least one light distribution, wherein the at least one projection arrangement ( 3 ) comprises
an entry optics ( 30 ) comprising a plurality of micro entry optics ( 31 ), and
an exit optics ( 40 ) comprising a plurality of micro exit optics ( 41 ), wherein
each micro entry optics ( 31 ) is paired with exactly one micro exit optics ( 41 ),

wherein the micro entry optics ( 31 ) are formed in such a way and/or the micro entry optics ( 31 ) and the micro exit optics ( 41 ) are arranged relative to one another in such a way that substantially all light exiting from the micro entry optics ( 31 ) enters only into the micro exit optics ( 41 ) paired therewith, wherein light pre-shaped by the micro entry optics ( 31 ) is imaged by the micro exit optics ( 41 ) into the region in front of the motor vehicle as the at least one light distribution (LV 1 -LV 5 ; GLV), and wherein at least one screen device ( 50 ) is arranged between the entry optics ( 30 ) and the exit optics ( 40 ).

2. The headlight of claim 1 , wherein each micro entry optics ( 31 ) is configured to focus light passing therethrough in at least one micro entry optics focal point (F 1 ).

3. The headlight of claim 2 , wherein the at least one micro entry optics focal point (F 1 ) of each micro entry optics ( 31 ) is located before the micro exit optics ( 41 ) paired therewith in a light exit direction.

4. The headlight of claim 3 , wherein each micro entry optics ( 31 ) is configured to focus light passing therethrough in a vertical direction onto the at least one micro entry optics focal point (F 1 ) lying before the micro exit optics ( 30 ).

5. The headlight of claim 1 , wherein the micro exit optics ( 41 ) each have a focal point (F 1 ) coinciding with a micro entry optics focal point (F 1 ) of the micro entry optics ( 31 ) paired therewith.

6. The headlight of claim 2 , wherein a micro-optics system comprising the micro entry optics ( 31 ) and the micro exit optics ( 41 ) is configured to widen light passing therethrough in a horizontal direction.

7. The headlight of claim 1 , wherein the micro entry optics ( 31 ) are formed as collecting optics.

8. The headlight of claim 1 , wherein the micro entry optics ( 31 ) are formed as free-form optics.

9. The headlight of claim 1 , wherein the micro exit optics ( 41 ) are formed as projection optics.

10. The headlight of claim 1 , wherein the micro exit optics ( 41 ) are formed as spherical lenses or as aspherical lenses.

11. The headlight of claim 1 , wherein the micro exit optics ( 41 ) are formed as free-form lenses.

12. The headlight of claim 1 , wherein boundary surfaces ( 31 ′, 41 ′) facing towards one another of the micro entry optics ( 31 ) and the micro exit optics ( 41 ) paired with one another are formed congruently to one another and are also arranged congruently to one another.

13. The headlight of claim 12 , wherein the boundary surfaces ( 31 ′, 41 ′) are flat.

14. The headlight of claim 1 , wherein optical axes ( 310 , 410 ) of the micro entry optics ( 31 ) and the micro exit optics ( 41 ) paired with one another extend parallel to one another.

15. The headlight of claim 14 , wherein the optical axes ( 310 , 410 ) coincide.

16. The headlight of claim 1 , wherein the at least one screen device ( 50 ) lies in a plane spanned by a micro exit optics focal points (F 1 ).

17. The headlight of claim 16 , wherein the at least one screen device ( 50 ) for at least one pair of micro entry and micro exit optics ( 31 , 41 ) paired with one another has a screen ( 51 , 52 , 53 , 54 , 55 ) having in each case at least one optically effective screen edge ( 51 ′, 52 ′, 53 ′, 54 ′, 55 ′).

18. The headlight of claim 17 , wherein all screens have identical screen edges.

19. The headlight of claim 17 , wherein at least two screens have differently formed screen edges.

20. The headlight of claim 1 , wherein the at least one projection arrangement ( 3 ) comprises a screen arrangement ( 50 ) formed in one part.

21. The headlight of claim 1 , wherein the at least one projection arrangement ( 3 ) is formed from two components which are separate from one another.

22. The headlight of claim 1 , wherein the at least one screen device ( 50 ) is arranged on a boundary surface ( 31 ′) of the entry optics ( 30 ) facing towards the exit optics ( 40 ).

23. The headlight of claim 1 , wherein the at least one screen device ( 50 ) is formed separately from the entry optics ( 30 ) and the exit optics ( 40 ).

24. The headlight of claim 1 , wherein the at least one light source ( 2 ) comprises at least one semiconductor light source.

25. The headlight of claim 1 , wherein at least one ancillary optics arrangement ( 4 ) is arranged between the at least one light source ( 2 ) and the at least one projection arrangement ( 3 ), into which the at least one light source ( 2 ) irradiates light emitted thereby, and which is formed in such a way that light exiting therefrom is directed substantially parallel.

26. The headlight of claim 25 , wherein the at least one ancillary optics arrangement ( 4 ) is formed as a collimator.

27. The headlight of claim 21 , wherein the exit optics ( 40 ) is mounted displaceably with respect to the entry optics ( 30 ).

28. The headlight of claim 27 , wherein the exit optics ( 40 ), in an installed position, is displaceable in the vertical and/or horizontal direction.

29. The headlight of claim 27 , wherein the exit optics ( 40 ) is displaceable parallel to the entry optics ( 30 ) and/or parallel to a screen device ( 50 ).

30. The headlight of claim 27 , wherein at least one actuator ( 140 , 141 ) is provided in order to displace the exit optics ( 40 ) in each direction.

31. The headlight of claim 30 , wherein the at least one actuator ( 140 , 141 ) is a piezo actuator.

32. The headlight of claim 1 , wherein light-emitting diodes and/or laser diodes of the at least one light source are controllable independently of one another.

33. The headlight of claim 1 , wherein the at least one light source comprises two or more light sources that are controllable independently of one another.

34. The headlight of claim 1 , wherein a micro system comprises the entry optics ( 31 ) and the micro exit optics ( 41 ) paired with precisely one light source, which comprises precisely one light-emitting diode or precisely one laser diode.

35. The headlight of claim 1 , wherein two or more light source groups are provided, wherein each light source group comprises at least one light source ( 2 ), and wherein light sources ( 2 ) of the at least one light source in the same light source group emit light of the same colour (R, G, B) or wavelength, and wherein light sources in different light source groups emit light of different colour (R, G, B), and wherein each light sour

Assignees

• Zizala Lichtsysteme Gmbh
• Zkw Group Gmbh

Inventors

• Bauer Friedrich
• Boehm Gerald

Classifications

• F21S41/151

  arranged in one or more lines · CPC title

• F21S41/275

  Lens surfaces, e.g. coatings or surface structures · CPC title

• F21S41/20

  characterised by refractors, transparent cover plates, light guides or filters · CPC title

• F21Y2101/00

  Point-like light sources · CPC title

• F21S41/285

  Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805 · CPC title