IP Library › Granted Patent US 10,139,068
Granted Patent B2
US 10,139,068 · App. 15/758,037 · Granted Nov 27, 2018

Light source arrangement in a pixel-light light module

Inventors: Josef Plank (Purgstall/Erlauf, AT); Lukas Taudt (Wieselburg, AT)
Assignee: ZKW Group GmbH
F21S41/24F21S41/143F21S41/255F21S41/65F21W2102/13F21Y2105/12F21Y2115/10
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Quick Facts
Patent No.
US 10,139,068
App. No.
15/758,037
Granted
Nov 27, 2018
Kind
B2
Abstract

The invention relates to a lighting device ( 20, 30 ) for a headlight, in particular a motor-vehicle headlight, comprising a plurality of light sources ( 200, 300 ), which are arranged adjacent to each other in rows ( 201, 202, 203, 301, 302, 303 ) and which form a lighting field ( 209, 309 ), and comprising a light-guiding device ( 204, 304 ) having a plurality of light-guiding elements ( 201 a, 202 a, 203 a, 301 a, 302 a, 303 a ), wherein each light-guiding element ( 201 a, 202 a, 203 a, 301 a, 302 a, 303 a ) is associated with one light source ( 200, 300 ), wherein each light-guiding element ( 201 a, 202 a, 203 a, 301 a, 302 a, 303 a ) has a light incoupling surface ( 201 b, 202 b, 203 b, 301 b, 302 b, 303 b ) for coupling in light emitted by the particular light source and a light outlet surface, wherein the light-guiding elements ( 201 a, 202 a, 203 a, 301 a, 302 a, 303 a ) are arranged in at least two linear rows ( 211, 212, 213, 311, 312, 313 ) arranged one over the other, and wherein the light-guiding elements ( 203 a, 303 a ) of the lowest row ( 213, 313 ) are designed as high-beam light-guiding elements ( 201 a, 301 a ) and form a high-beam row ( 213, 313 ), wherein the vertical distance between the light sources ( 200, 300 ) of the high-beam row ( 213, 313 ) and the light sources ( 200, 300 ) of the row ( 212, 312 ) arranged adjacent in the upward direction is smaller in at least one lateral edge region ( 208, 308 ) of the lighting field ( 209, 309 ) than in a central region ( 207, 307 ) of the lighting field ( 209, 309 ).

Claims (20)

1. A lighting device ( 20 , 30 ) for a motor-vehicle headlight, comprising:

a plurality of light sources ( 200 , 300 ), which are arranged adjacent to each other in rows ( 201 , 202 , 203 , 301 , 302 , 303 ) and which form a lighting field ( 209 , 309 )

a light-guiding device ( 204 , 304 ) having a plurality of light-guiding elements ( 201 a , 202 a , 203 a , 301 a , 302 a , 303 a ), wherein each light-guiding element ( 201 a , 202 a , 203 a , 301 a , 302 a , 303 a ) is associated with one of the light sources ( 200 , 300 ), wherein each light-guiding element ( 201 a , 202 a , 203 a , 301 a , 302 a , 303 a ) has a light incoupling surface ( 201 b , 202 b , 203 b , 301 b , 302 b , 303 b ) for coupling in light emitted by the particular light source and a light outlet surface, wherein the light-guiding elements ( 201 a , 202 a , 203 a , 301 a , 302 a , 303 a ) are arranged in at least two linear rows ( 211 , 212 , 213 , 311 , 312 , 313 ) arranged one over the other, and wherein the light-guiding elements ( 203 a , 303 a ) of the lowest row ( 213 , 313 ) are designed as high-beam light-guiding elements ( 201 a , 301 a ) and form a high-beam row ( 213 , 313 ),

wherein the vertical distance between the light sources ( 200 , 300 ) of the high-beam row ( 213 , 313 ) and the light sources ( 200 , 300 ) of the row ( 212 , 312 ) arranged adjacent in the upward direction is smaller in at least one lateral edge region ( 208 , 308 ) of the lighting field ( 209 , 309 ) than in a central region ( 207 , 307 ) of the lighting field ( 209 , 309 ).

2. The lighting device according to claim 1 , wherein the vertical distance between the light sources ( 200 , 300 ) of the high-beam row ( 213 , 313 ) and the light sources ( 200 , 300 ) of the upwardly adjacent row ( 212 , 312 ) decreases successively starting from the central region ( 207 , 307 ) in the direction of at least one of the edge regions ( 208 , 308 ).

3. The lighting device according to claim 1 , wherein the vertical distance between the light sources ( 200 , 300 ) of the high-beam row ( 213 , 313 ) and the light sources ( 200 , 300 ) of the upwardly adjacent row ( 212 , 312 ) in both lateral edge regions ( 208 , 308 ) of the lighting field ( 209 , 309 ) is smaller than in the central region ( 207 , 307 ) of the lighting field ( 209 , 309 ).

4. The lighting device according to claim 3 , wherein the vertical distance between the light sources ( 200 , 300 ) of the high-beam row ( 213 , 313 ) and the light sources of the upwardly adjacent row ( 212 , 312 ) decreases successively starting from the central region ( 207 , 307 ) in the direction of both edge regions ( 208 , 308 ).

5. The lighting device according to claim 1 , wherein the light sources ( 200 , 300 ) of the high-beam row ( 213 , 313 ) which are arranged in the central region ( 207 , 307 ) of the lighting field ( 209 , 309 ) are positioned such that they couple in the light in the centre of the light incoupling surface ( 201 b , 301 b ) of the particular light-guiding element ( 201 a , 301 a ).

6. The lighting device according to claim 1 , wherein the horizontal distance between adjacent light sources ( 300 ) increases in at least one of the edge regions ( 308 ) of the lighting field ( 309 ) in the direction of the row edge.

7. The lighting device according to claim 6 , wherein the horizontal distance between adjacent light sources ( 300 ) in both edge regions ( 308 ) increases in the direction of the row edge.

8. The lighting device according to claim 1 , wherein the light sources ( 200 ) are arranged symmetrically with respect to an optical axis ( 210 ).

9. The lighting device according to claim 1 , wherein the light sources ( 300 ) are arranged asymmetrically with respect to an optical axis ( 310 ).

10. The lighting device according to claim 1 , wherein the individual rows ( 301 , 302 , 303 ) of light sources ( 300 ) have different lengths.

11. The lighting device according to claim 1 , wherein the light-guiding elements ( 201 a , 202 a , 203 a , 301 a , 302 a , 303 a ) are arranged in precisely three rows ( 211 , 212 , 213 , 311 , 312 , 313 ) one above the other and jointly form a high-beam distribution, wherein the lowest row is the high-beam row ( 213 , 313 ).

12. The lighting device according to claim 1 , wherein the light outlet surfaces of the light-guiding elements ( 201 a , 202 a , 203 a , 301 a , 302 a , 303 a ) are part of a common light outlet surface ( 206 , 306 ), wherein individual light outlet surfaces border on one another.

13. The lighting device according to claim 1 , wherein the light sources ( 200 , 300 ) are light-emitting diodes (LEDs), which can be controlled individually.

14. The lighting device according to claim 1 , wherein the light-guiding elements ( 201 a , 202 a , 203 a , 301 a , 302 a , 303 a ) are embodied as optical waveguide elements.

15. The lighting device according to claim 1 , further comprising an imaging optics arranged downstream of the light-guiding device ( 204 , 304 ).

16. The lighting device according to claim 15 , wherein the imaging optics comprises one or more optical lenses.

17. A motor-vehicle headlight comprising the lighting device ( 20 , 30 ) according to claim 1 .

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 28, 2018
From: PLANK, JOSEF; TAUDT, LUKAS
To: ZKW GROUP GMBH
Reel/Frame 045943/0846 →
Priority Claims (1)
AT A 50798/2015 · Sep 17, 2015 · national
Continuity (1)
Related Publication 20180245759A1 · Aug 30, 2018