Vehicle headlight with laser light source

Patent metadata

Field	Value
Publication number	US-9664351-B2
Application number	US-201314382255-A
Country	US
Kind code	B2
Filing date	Mar 12, 2013
Priority date	Mar 12, 2012
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

The invention relates to a light source module ( 1 ) for a vehicle headlight ( 2 ), wherein the light source module ( 1 ) has at least one laser light source ( 3 ) and at least one luminous element ( 4 ) which can be excited by illumination with laser light to emit visible light and which can be irradiated by the laser light source ( 3 ), wherein the laser light source ( 3 ) and the luminous element ( 4 ) are arranged spaced apart from one another on a carrier element ( 5 ) and light source module ( 1 ) has means ( 5′, 6′; 5″, 6″ ) which are arranged on the carrier element ( 5 ) in order to be detachably mounted in the vehicle headlight. The invention also relates to a vehicle headlight ( 2 ) with at least one such light source module ( 1 ).

First claim

The invention claimed is:

1. A light source module ( 1 ) for a vehicle headlight ( 2 ), the light source module ( 1 ) comprising:
at least one laser light source ( 3 );
at least one luminous element ( 4 ) which is configured to be excited by illumination with laser light to emit visible light and which is configured to be irradiated by the laser light source ( 3 );
a carrier element ( 5 ) on which the laser light source ( 3 ) and the luminous element ( 4 ) are arranged spaced apart from one another; and
a means, which is arranged on the carrier element ( 5 ), for detachable mounting of the light source module ( 1 ) into the vehicle headlight ( 2 ), wherein the means for detachable mounting comprise reference means ( 5 ′, 6 ′; 5 ″, 6 ″) for referencing at least one of the light source module ( 1 ) and the laser light source ( 3 ) in the vehicle headlight ( 2 ), wherein the reference means are formed on at least one of the laser light source ( 3 ) and the carrier element ( 5 ), which cooperate with corresponding bearing surface receptacles on the vehicle headlight ( 2 ),
wherein the luminous element ( 4 ) is arranged on the carrier element ( 5 ) in such a way that the luminous element is arranged in the mounted state in a focal point of a reflector ( 6 ) of the vehicle headlight ( 2 ).

2. The light source module ( 1 ) according to claim 1 , wherein the reference means are formed as guide devices cooperating with corresponding guide receptacle devices in the vehicle headlight ( 2 ).

3. The light source module ( 1 ) according to claim 1 , wherein the reference means are formed as at least one dowel pin and at least one dowel hole, wherein the dowel pin is arranged on at least one of the laser light source ( 3 ) and the carrier element ( 5 ) and the dowel hole is arranged on the vehicle headlight ( 2 ), or vice versa.

4. The light source module ( 1 ) according to claim 1 , wherein the carrier element ( 5 ) is manufactured at least in part from at least one of a heat-conducting material and a transparent material.

5. The light source module ( 1 ) according to claim 1 , further comprising a concentrator optical element ( 7 ) arranged on the carrier element ( 5 ) and provided on the side of the luminous element ( 4 ) facing away from the laser light source ( 3 ), wherein the concentrator optical element ( 7 ) shields the luminous element ( 4 ) in the mounted state in the main radiation direction ( 100 ) of the vehicle headlight ( 2 ) and has a reflection layer ( 8 ) on the side thereof facing the luminous element ( 4 ).

6. The light source module ( 1 ) according to claim 1 , wherein at least one optical wave guide element ( 14 ) is arranged between the laser light source ( 3 ) and the luminous element ( 4 ).

7. The light source module ( 1 ) according to claim 1 , wherein the laser light source ( 3 ) is connected to at least one cooling element ( 15 ).

8. The light source module ( 1 ) according to claim 7 , wherein the cooling element ( 15 ) connected to the laser light source ( 3 ) is arranged on the carrier element ( 5 ).

9. The light source module ( 1 ) according to claim 7 , wherein the at least one cooling element ( 15 ) is formed as at least one of a heat sink and ventilation device.

10. The light source module ( 1 ) according to claim 1 , further comprising at least one safety switch device, which prevents an activation of the light source module ( 1 ) or of the laser light source ( 3 ) of the light source module ( 1 ), prior to complete installation of the light source module ( 1 ) in the vehicle headlight ( 2 ).

11. The light source module ( 1 ) according to claim 1 , wherein the bearing surfaces cooperate with corresponding bearing surface receptacles on a reflector ( 6 ) of the vehicle headlight ( 2 ).

12. A light source module ( 1 ) for a vehicle headlight ( 2 ), the light source module ( 1 ) comprising:
at least one laser light source ( 3 );
at least one luminous element ( 4 ) which is configured to be excited by illumination with laser light to emit visible light and which is configured to be irradiated by the laser light source ( 3 );
a carrier element ( 5 ) on which the laser light source ( 3 ) and the luminous element ( 4 ) are arranged spaced apart from one another, wherein the luminous element ( 4 ) is arranged in an optical element ( 9 ) arranged on the carrier element ( 5 ), wherein the optical element ( 9 ), at least on a side facing away from the laser light source ( 3 ), is assigned at least one of a reflection layer ( 8 ) reflecting light in the direction of the laser light source ( 3 ) and at least one light-impermeable absorption layer ( 12 ); and
a means, which is arranged on the carrier element ( 5 ), for detachable mounting of the light source module ( 1 ) into the vehicle headlight ( 2 ),
wherein the luminous element ( 4 ) is arranged on the carrier element ( 5 ) in such a way that the luminous element is arranged in the mounted state in a focal point of a reflector ( 6 ) of the vehicle headlight ( 2 ).

13. The light source module ( 1 ) according to claim 12 , wherein the side of the optical element ( 9 ) facing the laser light source ( 3 ) is covered at least in part, by a light-impermeable screen device ( 13 ).

14. The light source module ( 1 ) according to claim 13 , wherein the side of the optical element ( 9 ) facing the laser light source ( 3 ) is covered at least in a region below a horizontal plane ( 200 ) running through the luminous element ( 4 ) with a light impermeable coating or other light-impermeable screen device ( 13 ).

15. The light source module ( 1 ) according to claim 12 , wherein the optical element ( 9 ) is arranged on the carrier element in a blind bore ( 10 ) or in a cavity.

16. A light source module ( 1 ) for a vehicle headlight ( 2 ), the light source module ( 1 ) comprising:
at least one laser light source ( 3 );
at least one luminous element ( 4 ) which is configured to be excited by illumination with laser light to emit visible light and which is configured to be irradiated by the laser light source ( 3 );
a carrier element ( 5 ) on which the laser light source ( 3 ) and the luminous element ( 4 ) are arranged spaced apart from one another, wherein the carrier element ( 5 ) has at least one carrier base ( 50 ) with at least one laser light source ( 3 ) and at least one carrier arm ( 51 ) extending from the carrier base ( 50 ) and comprising at least one luminous element ( 4 ); and
a means, which is arranged on the carrier element ( 5 ), for detachable mounting of the light source module ( 1 ) into the vehicle headlight ( 2 ),
wherein the luminous element ( 4 ) is arranged on the carrier element ( 5 ) in such a way that the luminous element is arranged in the mounted state in a focal point of a reflector ( 6 ) of the vehicle headlight ( 2 ).

17. The light source module ( 1 ) according to claim 16 , wherein the carrier arm ( 51 ) is formed in a U shape starting from the carrier base ( 50 ), wherein the at least one luminous element ( 4 ) is arranged on the side of the carrier arm ( 51 ) facing the laser light source ( 3 ) in the position furthest from the carrier base ( 50 ).

18. A light source module ( 1 ) for a vehicle headlight ( 2 ), the light source module ( 1 ) comprising:
at least one laser light source ( 3 );
at least one luminous element ( 4 ) which is configured to be excited by illumination with laser light to emit visible light and which is configured to be irradiated by the laser light source ( 3 );
a carrier element ( 5 ) on which the laser light source ( 3 ) and the luminous element

Assignees

• Zizala Lichtsysteme Gmbh
• Zkw Group Gmbh

Inventors

• Bauer Friedrich
• Moser Andreas
• Altmann Johann
• Kaufmann Erich
• Jackl Christian

Classifications

• F21S41/176

  Light sources where the light is generated by photoluminescent material spaced from a primary light generating element · CPC title

• F21S45/48

  with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device · CPC title

• F21S45/10

  Protection of lighting devices (cooling of lighting devices F21S45/40; waterproofing of lighting devices F21S45/50) · CPC title

• F21K9/61

  using light guides · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title