Headlight module with a low-beam function and a high-beam function based on light emitting diodes

Patent metadata

Field	Value
Publication number	US-11255506-B2
Application number	US-201716300990-A
Country	US
Kind code	B2
Filing date	May 10, 2017
Priority date	May 18, 2016
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

A headlight module with a minimum of one LED for generating a low beam and with a minimum of one LED for generating a high beam. An optical element is provided into which light from the minimum of one LED for generating the high beam can be emitted. The optical element is arranged as a cover for a portion of the light that can be generated by the LED for generating a low beam. The optical element features a decoupling surface that at least partially includes a surface structure with a composition such that, in the area of the surface structure, light is emitted that can be decoupled from the optical element.

First claim

The invention claimed is:

1. A headlight module comprising:
at least one first LED, wherein a first light from the at least one first LED generates in part a low beam;
at least one second LED positioned in an area spatially in front of the at least one first LED with respect to a direction of propagation of the low beam, wherein a second light from the at least one second LED generates in part a high beam;
an optical element that receives the second light and generates in part the high beam therefrom;
wherein the optical element is set up as a cover for a part of the first light,
wherein the optical element comprises:
at least one first light guide coupled to the at least one second LED and entirely positioned and entirely located on a first side of the optical element;
surface structuring formed on a second side of the optical element, wherein the second side is opposite the first side;
a decoupling surface that at least partially surrounds the surface structuring on the second side of the optical element, the decoupling surface including a bump along its top edge defined by a special contour that serves as a contour for a cut-off line;
wherein within the area of the surface structuring, decoupled light is emitted out of the optical element; and
wherein the surface structuring further includes at least one section corresponding to the at least one first light guide.

2. The headlight module according to claim 1 , wherein the surface structuring is formed by a roughening of the decoupling surface.

3. The headlight module according to claim 1 , wherein the at least one second LED includes a plurality of LEDs and the at least one light guide includes a plurality of light guides, wherein each of the plurality of LEDs are arranged at respective free ends of corresponding ones of the plurality of light guides constructed adjacent to each other.

4. The headlight module of claim 1 , wherein the optical element has a mirrored surface, and wherein the optical element is arranged in such a way relative to the low beam that the low beam is at least partially reflected on the mirrored surface.

5. The headlight module of claim 1 , further comprising a cooling and support element on which the at least one first LED and the at least one second LED are arranged.

6. The headlight module of claim 1 , further comprising a lens positioned in relation to a direction of propagation of the low beam and of the high beam in front of the optical element and the low beam and high beam can be emitted into this lens together.

7. The headlight module of claim 1 further comprising:
at least one second light guide coupled to the at least one first LED.

8. The headlight module of claim 4 , wherein the mirrored surface appears on a top surface of the optical element, whereby the top surface and the decoupling surface form a bezel edge where the top surface and the decoupling surface meet, and wherein the bezel edge is a top edge of the decoupling surface.

9. The headlight module of claim 8 , wherein the mirrored surface continuously extends from a rear edge of the top surface proximate to the first side to a location partially along the top surface and set back from the bezel edge so as to produce a non-mirrored and at least partially transparent coupling area on the top surface between the location partially along the top surface and the bezel edge, wherein the coupling area enables a part of the low beam to pass through the top surface and become decoupled by the decoupling surface.

10. A headlight module comprising:
at least one first LED, wherein a first light from the at least one first LED generates in part a low beam;
at least one second LED, wherein a second light from the at least one second LED generates in part a high beam;
an optical element that receives the second light and generates in part the high beam therefrom;
wherein the optical element comprises:
at least one first light guide coupled to the at least one second LED and entirely positioned and entirely located on a first side of the optical element;
surface structuring formed on a second side of the optical element, wherein the second side is opposite the first side;
a decoupling surface that at least partially surrounds the surface structuring on the second side of the optical element, the decoupling surface including a bump along its top edge defined by a special contour that serves as a contour for a cut-off line;
a mirrored surface on a top surface of the optical element that forms a bezel edge where the top surface and the decoupling surface meet;
wherein the bezel edge is a top edge of the decoupling surface;
wherein the mirrored surface continuously extends from a rear edge of the top surface proximate to the first side to a location partially along the top surface and set back from the bezel edge so as to produce a non-mirrored and at least partially transparent coupling area on the top surface between the location partially along the top surface and the bezel edge;
wherein the coupling area enables a part of the low beam to pass through the top surface and become decoupled by the decoupling surface;
wherein within the area of the surface structuring, decoupled light that includes the high beam and the part of the low beam that passes through the top surface is emitted out of the optical element; and
wherein the surface structuring further includes at least one section corresponding to the at least one first light guide.

Assignees

• Hella Gmbh & Co Kgaa

Inventors

• Brunne David
• Fedosik Dmitry

Classifications

• F21W2102/145

  wherein the light is emitted between two parallel vertical cutoff lines, e.g. selectively emitted rectangular-shaped high beam · CPC title

• F21S45/47

  Passive cooling, e.g. using fins, thermal conductive elements or openings · CPC title

• G02B6/0055

  Reflecting element, sheet or layer · CPC title

• G02B6/0036

  2-D arrangement of prisms, protrusions, indentations or roughened surfaces · CPC title

• F21S41/663 Primary

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