Lighting device for a motor vehicle headlight
The invention relates to a lighting device ( 100 ) for a motor vehicle headlight, comprising a number of light sources ( 1 ), at least one attachment optical unit ( 2 ), having a light entrance surface ( 2 a ) and a light exit surface ( 2 b ), wherein the at least one attachment optical unit ( 2 ) comprises a plurality of light-guiding bodies ( 3 ), and wherein each light-guiding body ( 3 ) has a light entrance surface ( 3 a ), into which in each case at least one light source ( 1 ) feeds light, and wherein the light-guiding bodies ( 3 ) lead into the common light exit surface ( 2 b ). According to the invention, at least one, preferably exactly one, position holder ( 4 ) is provided, by means of which the light entrance surfaces ( 3 a ) of the light-guiding bodies ( 3 ) of the at least one attachment optical unit ( 2 ) are held in position in relation to the light sources ( 1 ). Alternatively or additionally, provision can be made for the light exit surface ( 2 b ) of the at least one attachment optical unit ( 2 ) to be provided with a transparent light plate ( 5 ) for the dimensional stabilization of the at least one attachment optical unit ( 2 ).
1. A lighting device ( 100 ) for a motor vehicle headlights comprising:
a plurality of light sources ( 1 );
at least one attachment optical unit ( 2 ) having a light entrance surface ( 2 a ) and a common light exit surface ( 2 b ), wherein the at least one attachment optical unit ( 2 ) comprises a plurality of light-guiding bodies ( 3 ), and wherein each light-guiding body ( 3 ) has a light entrance surface ( 3 a ), into which in each case at least one light source ( 1 ) feeds light, and wherein the light-guiding bodies ( 3 ) lead into the common light exit surface ( 2 b ); and
at least one position holder ( 4 ) which holds the light entrance surfaces ( 3 a ) of the light-guiding bodies ( 3 ) of the at least one attachment optical unit ( 2 ) in position in relation to the light sources ( 1 ), wherein the position holder ( 4 ) for each light-guiding body ( 3 ) has a receptacle ( 4 a ), in which the associated light-guiding body ( 3 ) is received and positioned with an accurate fit,
wherein the receptacles ( 4 a ) have a cross section tapering toward the rear, wherein this cross section is narrowed to a greater extent than that of the light-guiding body ( 3 ) such that delimiting walls of the receptacles ( 4 a ) have a greater convergence than delimiting walls of the light-guiding bodies ( 3 ), resulting in the light-guiding bodies ( 3 ) contacting the delimiting walls of the receptacles ( 4 a ) in a narrow region substantially along a line.
2. The lighting device according to claim 1 , wherein the light exit surface ( 2 b ) of the attachment optical unit ( 2 ) is provided with a transparent light plate ( 5 ) for the dimensional stabilisation of the attachment optical unit ( 2 ).
3. The lighting device according to claim 1 , wherein the position holder ( 4 ) is fabricated from a thermoplastic.
4. The lighting device according to claim 1 , wherein the position holder ( 4 ) receives the light-guiding bodies ( 3 ) at the end regions thereof facing the light entrance surfaces ( 3 a ).
5. The lighting device according to claim 1 , wherein the light-guiding bodies ( 3 ) are elongate, with a greater extension in the direction of propagation of the light than transversely thereto.
6. The lighting device according to claim 1 , wherein each light source comprises one or more light-emitting diodes.
7. The lighting device according to claim 1 , wherein the light-guiding bodies ( 3 ) have a cross section tapering toward the light entrance surfaces ( 3 a ) thereof.
8. The lighting device according to claim 1 , wherein the light-guiding bodies ( 3 ) are formed in the manner of a truncated cone or in a trapezoidal manner.
9. The lighting device according to claim 1 , wherein the at least one attachment optical unit ( 2 ) is fabricated from a transparent and formable plastic.
10. The lighting device according to claim 1 , wherein the at least one attachment optical unit ( 2 ) is produced from a silicone material.
11. The lighting device according to claim 1 , wherein the at least one attachment optical unit ( 2 ) is produced from a poly(organo)siloxane.
12. A lighting module comprising at least one lighting device according to claim 1 .
13. A vehicle headlight comprising at least one lighting device according to claim 1 .
14. The lighting device according to claim 1 , wherein the at least one position holder comprises exactly one position holder.
15. A lighting device ( 100 ) for a motor vehicle headlight comprising:
a plurality of light sources ( 1 );
at least one attachment optical unit ( 2 ) having a light entrance surface ( 2 a ) and a common light exit surface ( 2 b ), wherein the at least one attachment optical unit ( 2 ) comprises a plurality of light-guiding bodies ( 3 ), and wherein each light-guiding body ( 3 ) has a light entrance surface ( 3 a ), into which in each case at least one light source ( 1 ) feeds light, wherein the light-guiding bodies ( 3 ) lead into the common light exit surface ( 2 b ); and
a transparent, rigid light plate ( 5 ) for the dimensional stabilisation of the at least one attachment optical unit ( 2 ), said light plate being arranged after the light exit surface ( 2 b ) of the at least one attachment optical unit ( 2 ) in the direction of light propagation and directly against the light exit surface ( 2 b ) of the at least one attachment optical unit ( 2 ).
16. The lighting device according to claim 15 , wherein at least one position holder ( 4 ) is provided, by means of which the light entrance surfaces ( 3 a ) of the light-guiding bodies ( 3 ) are held in position in relation to the light sources ( 1 ).
17. The lighting device according to claim 15 , wherein the light exit surface ( 2 b ) of the attachment optical unit ( 2 ) is overmoulded with the transparent light plate ( 5 ).
18. The lighting device according to claim 15 , wherein the light exit surface is fabricated from a plastic.
19. The lighting device according to claim 16 , wherein the at least one position holder ( 4 ) is fabricated from black plastic.
20. The lighting device according to claim 16 , wherein the position holder ( 4 ) has a receptacle ( 4 a ) for each light-guiding body ( 3 ), in which receptacle the associated light-guiding body ( 3 ) is received and positioned with an accurate fit.
21. The lighting device according to claim 16 , wherein the at least one position holder comprises exactly one position holder.
22. The lighting device according to claim 17 , wherein the light exit surface ( 2 b ) is overmoulded over the entire area with the transparent light plate ( 5 ).
23. The lighting device according to claim 18 , wherein the plastic comprise polycarbonate or another thermoplastic.
24. The lighting device according to claim 19 , wherein the black plastic comprise a thermoplastic.
25. The lighting device according to claim 20 , wherein a material is introduced into the receptacles ( 4 a ), in each case between the position holder ( 4 ) and the light-guiding bodies ( 3 ), said material having a lower refractive index than the material of the light-guiding bodies ( 3 ).
26. The lighting device according to claim 25 , wherein the material with lower refractive index surrounds the light-guiding body ( 3 ) in such a way that said light-guiding body does not contact the position holder ( 4 ).