Lighting device for a motor vehicle headlight

Patent metadata

Field	Value
Publication number	US-9915405-B2
Application number	US-201415032706-A
Country	US
Kind code	B2
Filing date	Oct 27, 2014
Priority date	Oct 28, 2013
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

The invention relates to a lighting device ( 500 ) for a motor vehicle headlight, wherein the lighting device comprises at least one optical body ( 1 ) and at least one mounting device ( 100 ) for the at least one optical body ( 1 ), wherein the at least one optical body ( 1 ) has a number of adjacently arranged ancillary optics ( 11, 12, 13, 14, 15 ), wherein each ancillary optics ( 11 - 15 ) is formed from a light-guiding material and each ancillary optics ( 11 - 15 ) has a light-coupling face ( 11 a - 15 a ) and a light-decoupling face ( 11 b - 15 b ), wherein the at least one mounting device ( 100 ) has at least one receptacle ( 111, 112, 113, 114, 115 ) for each ancillary optics ( 11 - 15 ), and wherein receptacles ( 111 - 115 ) are delimited by delimiting walls ( 111′, 112′, 113′, 114′, 115′ ), wherein the delimiting walls ( 111′, 112′, 113′, 114′, 115′ ) have boundary edges ( 111 a′, 112 a′, 113 a′, 114 a′, 115 a ′) on the light exit side, which boundary edges ( 111 a′, 112 a′, 113 a′, 114 a′, 115 a ′) are imaged, in a light distribution produced by means of the at least one optical body ( 1 ), as light-dark edges between the partial light distributions produced by the individual ancillary optics ( 11 - 15 ), and wherein a projection arrangement, preferably a projection lens ( 501 ), is arranged downstream of the at least one optical body ( 1 ) in the light exit direction, and wherein the ancillary optics ( 11 - 15 ) are arranged and/or configured in such a way that the light-decoupling faces ( 11 b - 15 b ) of the ancillary optics ( 11 - 15 ) protrude in the light exit direction beyond the boundary edges ( 111 a′, 112 a′, 113 a′, 114 a′, 115 a ′) of the delimiting walls ( 111′, 112′, 113′, 114′, 115′ ).

First claim

The invention claimed is:

1. A lighting device ( 500 ) for a motor vehicle headlight, the lighting device comprising:
at least one optical body ( 1 );
at least one mounting device ( 100 ) for the at least one optical body ( 1 ); and
a projection lens ( 501 ) arranged downstream of the at least one optical body ( 1 ) in the light exit direction,
wherein the at least one optical body ( 1 ) has a number of adjacently arranged ancillary optics ( 11 , 12 , 13 , 14 , 15 ), wherein each ancillary optics ( 11 - 15 ) is formed from a light-guiding material and each ancillary optics ( 11 - 15 ) has a light-coupling face ( 11 a - 15 a ) and a light-decoupling face ( 11 b - 15 b ),
wherein the at least one mounting device ( 100 ) has at least one receptacle ( 111 , 112 , 113 , 114 , 115 ) for each ancillary optics ( 11 - 15 ), and wherein receptacles ( 111 - 115 ) are delimited by delimiting walls ( 111 ′, 112 ′, 113 ′, 114 ′, 115 ′), wherein the delimiting walls ( 111 ′, 112 ′, 113 ′, 114 ′, 115 ′) are formed from a light-impermeable material and have boundary edges ( 111 a ′, 112 a ′, 113 a ′, 114 a ′, 115 a ′) on the light exit side,
wherein the light exit-side boundary edges ( 111 a ′, 112 a ′, 113 a ′, 114 a ′, 115 a ′) of the delimiting walls ( 111 ′, 112 ′, 113 ′, 114 ′, 115 ′) lie in a common plane (E 1 ) and a focal point (F 1 ) of the projection lens ( 501 ) lies in this common plane (E 1 ), such that the boundary edges ( 111 a ′, 112 a ′, 113 a ′, 114 a ′, 115 a ′) are imaged, in a light distribution produced by means of the at least one optical body ( 1 ), as light-dark edges between the partial light distributions produced by the individual ancillary optics ( 11 - 15 ), and
wherein the ancillary optics ( 11 - 15 ) are arranged and/or configured in such a way that the light-decoupling faces ( 11 b - 15 b ) of the ancillary optics ( 11 - 15 ) protrude in the light exit direction beyond the boundary edges ( 111 a ′, 112 a ′, 113 a ′, 114 a ′, 115 a ′) of the delimiting walls ( 111 ′, 112 ′, 113 ′, 114 ′, 115 ′).

2. The lighting device according to claim 1 , characterised in that the boundary edges ( 111 a ′, 112 a ′, 113 a ′, 114 a ′, 115 a ′) lie in a common plane (E 1 ).

3. The lighting device according to claim 2 , characterised in that the common plane (E 1 ) of the boundary edges ( 111 a ′, 112 a ′, 113 a ′, 114 a ′, 115 a ′) is flat and is preferably arranged approximately normal to the light exit direction.

4. The lighting device according to any one of claims 1 to 3 , characterised in that the light-decoupling faces ( 11 b - 15 b ) of the ancillary optics ( 11 - 15 ) are flat.

5. The lighting device according to claim 4 , characterised in that the light-decoupling faces ( 11 b - 15 b ) of the ancillary optics ( 11 - 15 ) lie in a common plane (E 2 ).

6. The lighting device according to claim 5 , characterised in that the common plane of the light-decoupling faces ( 11 b - 15 b ) is arranged at a constant distance from the common plane of the boundary edges ( 111 a ′, 112 a ′, 113 a ′, 114 a ′, 115 a ′).

7. The lighting device according to any one of claims 2 to 6 , characterised in that the common plane (E 1 ) of the boundary edges ( 111 a ′, 112 a ′, 113 a ′, 114 a ′, 115 a ′) lies in a focal point (F 1 ) of the projection lens ( 501 ) or contains this.

8. The lighting device according to any one of claims 1 to 7 , characterised in that the ancillary optics ( 11 - 15 ) bear directly, i.e. with no distance, against the delimiting walls ( 111 ′, 112 ′, 113 ′, 114 ′, 115 ′) of their at least one receptacle ( 111 - 115 ).

9. The lighting device according to any one of claims 1 to 8 , characterised in that delimiting walls ( 111 ′, 112 ′, 113 ′, 114 ′, 115 ′) are provided at least between the adjacently arranged receptacles.

10. The lighting device according to claim 9 , characterised in that the two outer receptacles ( 111 , 115 ) are also each delimited on their outer side by delimiting walls ( 111 ′, 115 ′).

11. The lighting device according to claim 9 or 10 , characterised in that adjacently arranged receptacles ( 111 , 112 ; 112 , 113 ; 113 , 114 ; 114 , 115 ) are each separated by a common separation web ( 212 , 223 , 234 , 245 ), which webs form the delimiting walls ( 111 ′, 112 ′, 113 ′, 114 ′, 115 ′) for the adjacent receptacles ( 111 - 115 ).

12. The lighting device according to any one of claims 1 to 11 , characterised in that the mounting device ( 100 ) can be connected to a support ( 200 ) for one or more light sources ( 2 ), which are provided to radiate light into the ancillary optics ( 11 - 15 ) of the optical body ( 1 ).

13. The lighting device according to claim 12 , characterised in that the position of the boundary edges ( 111 a ′, 112 a ′, 113 a ′, 114 a ′, 115 a ′) relative to the at least one light source ( 2 ) is fixed, and the optical body ( 1 ) is lengthened in the light exit direction compared with an optical body ( 1 ′) of which the light exit faces lie in a common plane (E 1 ) with the boundary edges.

14. The lighting device according to any one of claims 1 to 13 , characterised in that the mounting device ( 100 ) comprises a main body ( 101 ), which can be connected to the support ( 200 ) for the one or more light sources ( 2 ) for feeding light into the optical body ( 1 ).

15. The lighting device according to claim 14 , characterised in that the receptacles ( 111 , 112 , 113 , 114 , 115 ) for the ancillary optics ( 11 - 15 ) are formed in the main body ( 101 ).

16. The lighting device according to claim 15 , characterised in that the ancillary optics ( 11 - 15 ) are mechanically interconnected in the region of the light-decoupling faces ( 11 b - 15 b ) by means of at least one connecting web ( 21 , 22 ) extending transversely to the ancillary optics ( 11 - 15 ), wherein the at least one connecting web ( 21 , 22 ) is optically ineffective at least in regions, and wherein the main body ( 101 ) also has at least one stop region ( 121 , 122 ), against which the optical body ( 1 ) can be brought into abutment via a rear face ( 21 ′, 22 ′) of the at least one connecting web ( 21 , 22 ) when the ancillary optics ( 11 - 15 ) are inserted into the at least one receptacle ( 111 , 112 , 113 , 114 , 115 ).

17. The lighting device according to any one of claims 1 to 16 , characterised in that the light-decoupling faces ( 11 b - 15 b ) of adjacent ancillary optics ( 11 - 15 ) are arranged at a distance a>0 from one another.

18. The lighting device according to any one of claims 1 to 17 , characterised in that the optical element ( 1 ) consists of at least two separate optical components ( 1 a , 1 b ), wherein each optical component ( 1 a , 1 b ) comprises at least one light-guiding body ( 11 , 13 , 15 ; 12 , 14 ).

19. The lighting device according to claim 18 , characterised in that the optical element ( 1 a , 1 b ) consists of precisely two optical components ( 1 a , 1 b ).

20. The lighting device according to any one of claims 1 to 19 , characterised in that at least one, preferably all optical components ( 1 a , 1 b ) comprises/comprise two or more light-guiding bodies ( 11 , 13 , 15 ; 12 , 14 ).

Assignees

• Zizala Lichtsysteme Gmbh
• Zkw Group Gmbh

Inventors

• Maier Udo
• Taudt Lukas
• Reittegger Oliver

Classifications

• F21S41/151

  arranged in one or more lines · CPC title

• F21S41/25 Primary

  Projection lenses · CPC title

• F21S41/43

  characterised by the shape thereof · CPC title

• F21S41/29

  Attachment thereof (for achieving variable light distribution F21S41/63) · CPC title

• F21S41/663

  by switching light sources (by switching incandescent light sources F21S41/162) · CPC title