Headlight, in particular headlight of a motor vehicle

Patent metadata

Field	Value
Publication number	US-10900630-B2
Application number	US-201816195108-A
Country	US
Kind code	B2
Filing date	Nov 19, 2018
Priority date	May 18, 2016
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A headlight, in particular a headlight of a motor vehicle, having at least one first light source for a high beam, which emits light during operation of the headlight, and a first light guide having at least one light entry surface for the light emerging from the at least one first light source and at least one light exit surface, and at least one second light source for a low beam, which emits light during operation of the headlight, and a second light guide, which has at least one light entry surface for the light, emerging from the at least one second light source, and at least one light exit surface.

First claim

What is claimed is:

1. A headlight comprising:
at least one first light source for a high beam, which emits light during operation of the headlight;
a first light guide having at least one light entry surface for the light emerging from the at least one first light source and having at least one light exit surface;
at least one second light source for a low beam, which emits light during operation of the headlight; and
a second light guide, which has at least one light entry surface for the light emerging from the at least one second light source and having at least one light exit surface,
wherein the headlight is designed such that part of the light emerging from the second light guide enters the first light guide so as to generate a portion of light that enters a region located above the region illuminated by the low beam.

2. The headlight according to claim 1 , wherein the at least one first light source and the at least one second light source are arranged on a mutual holder, wherein the at least one first light source and the at least one second light source are formed as light-emitting diodes and are arranged on a shared circuit board.

3. The headlight according to claim 1 , wherein the at least one light exit surface of the second light guide has a structuring that homogenizes the exiting light.

4. The headlight according to claim 1 , wherein the first light guide is more extended in the light propagation direction than the second light guide, such that a section of the first light guide projects beyond the second light guide in the light propagation direction.

5. The headlight according to claim 4 , wherein the first light guide has a surface which is formed to be at least sectionally reflective and is provided with a reflective coating to form a reflection region.

6. The headlight according to claim 5 , wherein the surface, formed at least sectionally reflective, is located in the section of the first light guide which projects beyond the second light guide in the light propagation direction, so that the light emerging from the second light guide is reflected at least partially on the surface formed at least sectionally reflective.

7. A headlight comprising:
at least one first light source for a high beam, which emits light during operation of the headlight;
a first light guide having at least one light entry surface for the light emerging from the at least one first light source and having at least one light exit surface;
at least one second light source for a low beam, which emits light during operation of the headlight; and
a second light guide, which has at least one light entry surface for the light emerging from the at least one second light source and having at least one light exit surface,
wherein the first light guide is more extended in the light propagation direction than the second light guide, such that a section of the first light guide projects beyond the second light guide in the light propagation direction,
wherein the first light guide has a surface which is formed to be at least sectionally reflective and is provided with a reflective coating to form a reflection region, and
wherein the reflective region of the surface formed at least sectionally reflective does not extend to the edge of the light exit surface of the first light guide, and has a distance between 0.3 mm and 5.0 mm to the edge of the light exit surface.

8. The headlight according to claim 1 , wherein the at least one light exit surface of the first light guide is curved.

9. The headlight according to claim 1 , wherein the first light guide has a light entry region for the entry of light emerging from the second light guide, the light entry region being in a surface formed at least sectionally reflective, wherein the light entry region is realized by a step.

10. The headlight according to claim 1 , wherein the first light guide and the second light guide are arranged adjacent to one another or abut one another at least in sections.

11. The headlight according to claim 1 , wherein the first and/or second light guide comprises a positioner which predetermines the arrangement of the first light guide and the second light guide to one another, wherein the first light guide and the second light guide partially engage one another or are inserted into one another so that the distance between the first light guide and the second light guide is predetermined by the connection of the first light guide and the second light guide.

12. The headlight according to claim 1 , further comprising a device for generating a vertical cut-off line.

13. The headlight according to claim 12 , wherein the device for generating the vertical cut-off line comprises two of the first light guide, such that two first light guides are provided, wherein the light sources assigned to the two first light guides are controllable separately, or wherein the device for generating the vertical cut-off line has an at least partially opaque coating on a section of the light exit surface of the first light guide.

14. The headlight according to claim 1 , further comprising a lens through which the light emerging from the light exit surface of the first light guide and/or the light exit surface of the second light guide passes during operation of the headlight.

15. The headlight according to claim 1 , wherein the headlight is a motor vehicle headlight.

16. The headlight according to claim 7 , wherein the reflective region of the surface formed at least sectionally reflective has a distance between 0.5 mm and 3.0 mm to the edge of the light exit surface.

17. The headlight according to claim 7 , wherein the reflective region of the surface formed at least sectionally reflective has a distance of about 1.0 mm to the edge of the light exit surface.

18. The headlight according to claim 3 , wherein the structuring is a prism array.

19. The headlight according to claim 12 , wherein the device for generating the vertical cut-off line comprises two of the first light guide, such that two first light guides are provided, and wherein the light sources assigned to the two first light guides are controllable separately.

Assignees

• Hella Gmbh & Co Kgaa

Inventors

• Dikau Reinhard
• Hagedorn Susanne
• Letzin Ronny
• Mallon Matthias
• Regenbrecht Alfons
• Richter Wilfried
• Suesselbeck Daniel

Classifications

• F21W2102/18

  for overhead signs · CPC title

• F21S41/24 Primary

  Light guides · CPC title

• F21S41/151

  arranged in one or more lines · CPC title

• F21S41/322

  the reflector using total internal reflection · CPC title

• F21S41/143

  the main emission direction of the LED being parallel to the optical axis of the illuminating device · CPC title