Lighting module and device with reduced size for automobile vehicles

Patent metadata

Field	Value
Publication number	US-10161587-B2
Application number	US-201715439196-A
Country	US
Kind code	B2
Filing date	Feb 22, 2017
Priority date	Feb 23, 2016
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

Module for emitting at least one light beam along an optical axis for automobile vehicles. The module includes at least a first and at least a second light sources, at least a first and at least a second optical collectors designed to collect the light emitted by the at least a first and the at least a second light sources, respectively, and for redirecting the light collected in convergent directions. At least one of the at least a first and the at least a second light sources is oriented in such a manner as to emit light in an overall direction of emission moving away from the optical axis. The collector associated with the or with said oriented light sources have at least partially an asymmetrical configuration elongating the collector along the optical axis.

First claim

The invention claimed is:

1. A module for emitting at least one light beam along an optical axis for automobile vehicles, comprising:
a first light source and a second light source,
a first optical collector and a second optical collector arranged symmetrically with respect to the optical axis and designed to collect the light emitted by said first and second light sources, respectively, and to redirect the light collected in convergent directions, wherein:
at least one of said first and second light sources is oriented, in such a manner as to emit light in an overall direction of emission moving away from the optical axis; and
the collector associated with the oriented light source has, at least partially, an asymmetrical configuration elongating the collector along the optical axis, wherein the overall direction of emission forms an angle of emission between 5 and 15 degrees with the optical axis.

2. The module according to claim 1 , wherein said first and second collectors are adapted for redirecting the light onto at least one focal region.

3. The module according to claim 1 , wherein said first and second collectors are adapted for redirecting the light onto the same focal region.

4. The module according to claim 1 , wherein at least one of the collectors comprises a collection portion oriented in the overall direction of emission of the associated light source, in such a manner as to collect and to collimate the light coming from said light source.

5. The module according to claim 4 , wherein the collector and/or collectors are designed to collimate light rays coming from said source in a direction forming a non-zero collimation angle with respect to the optical axis.

6. The module according to claim 1 , wherein at least one of said first and second collectors comprises an exit surface forming an optical interface, said surface being configured for focusing the collimated light toward said focal region.

7. The module according to claim 6 , wherein said exit surface is inclined in a direction of inclination forming an angle of inclination with the optical axis of the collector in a range between 5° and 20°.

8. The module according to claim 1 , furthermore comprising a cut-off element configured to give a cut-off profile to the beam.

9. The module according to claim 8 , wherein said cut-off element is reflecting.

10. The module according to claim 8 , wherein said cut-off element is disposed along the optical axis between said first and second collectors.

11. The module according to claim 1 , wherein:
said first light source and first collector are designed to supply a first beam with a cut-off profile for an illumination of the low-beam type, and
said second light source and said second collector are designed to supply a second beam used for an illumination of the high-beam type.

12. The module according to claim 1 , wherein at least one of said first and second light sources comprises a light-emitting diode.

13. The module according to claim 1 , wherein said sources of light and said collectors are disposed symmetrically with respect to the optical axis.

14. The module according claim 1 , comprising a plurality of first and second light sources and a plurality of first and second collectors associated respectively with the first and second light sources, and wherein the first collectors are formed as a single element and/or the second collectors are formed as a single element with one another, respectively.

15. The module according to claim 14 , furthermore comprising a projection lens common to said plurality of first and second collectors and disposed along the optical axis to project light from the collectors.

16. An emission device comprising at least one emission module according to claim 1 .

17. An emission device according to claim 16 , wherein said device is a front headlamp of an automobile vehicle.

18. A module for emitting at least one light beam along an optical axis for automobile vehicles, comprising:
a first light source;
a second light source;
a first optical collector; and
a second optical collector, wherein:
each of the first and second light sources has an overall direction of emission away from the optical axis and forming a non-zero angle with respect to the optical axis,
the first and second light sources are oriented symmetrically with respect to the optical axis, and
the first and second optical collectors collect the light emitted by said first and second light sources, respectively, and redirect the light collected in respective first and second directions away from the optical axis and forming an angle between 0 and 15 degrees with the optical axis.

19. The module according to claim 18 , wherein each of the first and second optical collectors has an asymmetrical configuration elongating the collector along the optical axis.

20. The module according to claim 18 , wherein said directions form an angle of about 1 degrees with respect to the optical axis and said overall directions of emission form an angle of about 5 degrees with respect to said optical axis.

21. The module according to claim 20 , wherein said directions form angles with respect to the optical axis equal to each other and said overall directions of emission form angles with respect to said optical axis equal to each other.

22. The module according to claim 18 , wherein said directions form angles with respect to the optical axis equal to each other and said overall directions of emission form angles with respect to said optical axis equal to each other.

23. The module according to claim 18 , wherein said directions form an angle in a range of 0 to 15 degrees with respect to the optical axis and said overall directions of emission form an angle in a range of 5 to 15 degrees with respect to said optical axis.

24. The module according to claim 18 , wherein said optical collectors have an exit surface inclined to form an angle with respect to the optical axis in a range of 5 to 20 degrees.

25. The module according to claim 18 , comprising:
a projection lens having a focal point F;
a cut-off element disposed between the optical collectors along the optical axis;
said optical collectors being formed of a material having a refractive index n; and
said optical collectors having an exit surface through which collected light exits;
wherein the exit surface is inclined to form an angle with respect to the optical axis defined as

Arcsin
⁡

(

n
air

·

D
h

n
·
D

)

where n air denotes the refractive index of air, D h denotes the distance between a point of tangency to the exit surface and a plane comprising the cut-off element and D denotes a distance between a point of tangency of the exit surface and the focal point F.

26. The module according to claim 18 , comprising:
a cut-off element disposed between the optical collecto

Assignees

• Valeo Vision

Inventors

• Gousset-Rousseau Simon

Classifications

• F21S41/322

  the reflector using total internal reflection · CPC title

• F21S41/663

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

• F21S41/147 Primary

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

• B60Q1/16

  illuminating the way asymmetrically · CPC title

• F21S41/40

  characterised by screens, non-reflecting members, light-shielding members or fixed shades · CPC title