LED light-source module for an LED motor vehicle headlight

Patent metadata

Field	Value
Publication number	US-9243771-B2
Application number	US-201214237710-A
Country	US
Kind code	B2
Filing date	Jul 16, 2012
Priority date	Aug 8, 2011
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

An LED light source module for an LED motor vehicle headlight is disclosed. The module comprises at least one LED light source composed of at least one light-emitting diode, which couples light into an associated primary lens wherein the in-coupled light at least partially exits a light exit area of the primary lens. The module also comprises a secondary lens, which images the light exiting the exit area—when the headlight is installed in a vehicle—as a light pattern onto a region located in front of the vehicle. A diaphragm assembly is provided between the light exit area and the secondary lens. The diaphragm assembly comprising at least one optically effective diaphragm edge, which is arranged and/or extends such that undesired distortions occurring in an upper and/or lower region of the light pattern are at least partially suppressed in the light pattern.

First claim

The invention claimed is:

1. An LED light source module for an LED motor vehicle headlight for generating a dynamic light distribution, the LED light source module comprising:
one or more LED light sources, the one or more LED light sources being composed of one or more light-emitting diodes, and the one or more light-emitting diodes coupling light into an associated primary lens of one or more primary lenses, the in-coupled light at least partially exiting one or more light exit areas of the one or more primary lenses,
at least one secondary lens, which images the light exiting the one or more light exit areas of the one or more primary lenses, when the headlight is installed in a vehicle, as a light pattern onto a region located in front of the vehicle,
a diaphragm assembly between the one or more light exit areas of the one or more primary lenses and the at least one secondary lens, the diaphragm assembly comprising at least one diaphragm edge, wherein a total light exit area, formed of the one or more light areas of the one or more primary lenses has a defined height and width,
wherein:
a focal point of the at least one secondary lens is located in a lateral border region of the total light exit area,
the at least one diaphragm edge has a course/contour at which the at least one diaphragm edge has a larger distance to the focal point along a normal distance to a horizontal plane through the focal point of the at least one secondary lens than to the horizontal plane in a border region of the total light exit area located opposite the focal point, and
the normal distance of the diaphragm edge to the focal point of the at least one secondary lens constitutes the largest distance of the at least one diaphragm edge to the horizontal plane, and the normal distance to the horizontal plane decreases toward the border region located further away from the focal point,

so that undesired distortions occurring in an upper and/or lower region of the light pattern are at least partially suppressed in the light pattern.

2. The LED light source module according to claim 1 , wherein the one or more LED light sources comprises two or more LED light sources.

3. The LED light source module according to claim 1 , wherein the normal distance of the diaphragm edge to the focal point of the at least one secondary lens constitutes the largest distance of the diaphragm edge to the horizontal plane, and the normal distance to the horizontal plane remains the same as the normal distance of the diaphragm edge to the focal point.

4. The LED light source module according to claim 1 , wherein the at least one diaphragm edge comprises two optically effective diaphragm edges, these being an upper diaphragm edge and a lower diaphragm edge.

5. The LED light source module according to claim 4 , wherein the diaphragm assembly is composed of one diaphragm or two diaphragms, which comprise the at least one diaphragm edge.

6. The LED light source module according to claim 1 , wherein the diaphragm assembly is designed as one piece with, or is attached to, a holder for the one or more primary lenses.

7. The LED light source module according to claim 1 , wherein the diaphragm assembly is formed of a material that is at least partially optically transparent.

8. The LED light source module according to claim 7 , wherein the diaphragm assembly or at least one diaphragm thereof is coated with a semi-transparent material.

9. The LED light source module according to claim 1 , wherein the diaphragm assembly comprises at least one diaphragm having a planar design or that the at least one diaphragm edge is located in a vertical plane, which runs parallel to the total light exit area of the one or more primary lenses.

10. The LED light source module according to claim 1 , wherein at least one diaphragm of the diaphragm assembly, or the at least one diaphragm edge, is curved in a horizontal direction,
wherein the curvature follows or corresponds essentially to a field of curvature of the at least one secondary lens.

11. The LED light source module according to claim 1 , wherein the at least one diaphragm edge, or a projection of the at least one diaphragm edge into a vertical plane, has a curved course.

12. The LED light source module according to claim 1 , wherein the at least one diaphragm edge, or a projection of the at least one diaphragm edge into a vertical plane, is composed of one or more rectilinear section(s).

13. The LED light source module according to claim 11 , wherein a transition between two curved curve sections is discontinuous.

14. The LED light source module according to claim 1 , wherein the at least one diaphragm edge, or a projection of the at least one diaphragm edge, has a continuous or a discontinuous course.

15. The LED light source module according to claim 1 , wherein exactly two diaphragm edges are provided, wherein an upper edge has a normal distance to a horizontal plane through the focal point of the at least one secondary lens that is smaller than that of a lower edge.

16. The LED light source module according to claim 1 , wherein exactly two diaphragm edges are provided, wherein an upper edge and a lower edge have courses that are mirrored with respect to a horizontal plane of symmetry.

17. The LED light source module according to claim 1 , wherein the one or more light exit areas of the one or more primary lenses are joined to each other by way of a translucent material in such a way that light that is coupled into the one or more primary lenses can enter the translucent material and exit the same again via a light exit area of the translucent material.

18. The LED light source module according to claim 17 , wherein the one or more light exit areas of the one or more primary lenses are located in a common area, and the light exit area of the translucent material is likewise located in the common area of the one or more light exit areas of the one or more primary lenses.

19. The LED light source module according to claim 17 , wherein the one or more light exit areas of the one or more primary lenses are joined to each other in an upper and/or in a lower region.

20. The LED light source module according to claim 17 , wherein at least one essentially horizontal joining rib, which is formed of the translucent material, is provided, which joins the one or more primary lenses to each other in an upper and/or lower regions of the one or more light exit areas thereof.

21. The LED light source module according to claim 20 , wherein two essentially horizontal joining ribs which are formed of the translucent material, are provided, which join the one or more primary lenses to each other in the upper and lower regions of the one or more light exit areas thereof.

22. The LED light source module according to claim 20 , wherein the at least one joining rib is designed as one piece with the one or more light exit areas of the one or more primary lenses or with the one or more primary lenses.

23. The LED light source module according to claim 20 , wherein the one or more light exit areas of the one or more primary lenses and those of the at least one joining rib form a common light exit area.

24. The LED light source module according to claim 17 , wherein the one or more light exit areas of the one or more primary lens are rectangular.

25. The LED light source module according to claim 17 , wherein the one or more light exit areas have an identical sh

Assignees

• Jungwirth Johannes
• Moser Andreas
• Krenn Günther
• Zizala Lichtsysteme Gmbh

Inventors

• Jungwirth Johannes
• Moser Andreas
• Krenn Günther

Classifications

• F21S41/43

  characterised by the shape thereof · CPC title

• F21S41/265

  Composite lenses; Lenses with a patch-like shape · CPC title

• F21S41/26

  Elongated lenses · CPC title

• F21S41/24

  Light guides · CPC title

• F21S41/151

  arranged in one or more lines · CPC title