Vehicle light assembly comprising flexible lighting strip

Patent metadata

Field	Value
Publication number	US-10711971-B2
Application number	US-201716346049-A
Country	US
Kind code	B2
Filing date	Oct 2, 2017
Priority date	Oct 14, 2016
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

A vehicle light assembly comprising: a flexible lighting strip with a multitude of light-emitting diodes that are bent around at least two linear independent axes; an optically passive lighting strip terminator that is coupled to an end surface of the flexible lighting strip and is arranged such that light emitted by the light emitting diodes is at least partly recycled; a light guiding structure comprising a light receiving surface that receives light emitted by the flexible lighting strip and the lighting strip terminator and surface defines a bending of the flexible lighting strip and a primary light emission surface that emits at least a part of the light received via the light receiving surface; a coupling structure that mechanically couples the flexible lighting strip and the lighting strip terminator to the light receiving surface. The vehicle light assembly can further be comprised in a front or rear vehicle light.

First claim

The invention claimed is:

1. A vehicle light assembly comprising:
a flexible lighting strip, comprising a plurality of light-emitting diodes, arranged to be bended around at least two linear independent axes;
an optically passive lighting strip terminator coupled to a lateral end surface of the flexible lighting strip, the lighting strip terminator is perpendicular to the longitudinal extension and a light output surface of the flexible lighting strip, the lighting strip terminator is arranged such that light emitted by the light emitting diodes leaving the flexible lighting strip via the end surface of the flexible lighting strip is at least partly recycled;
a light guiding structure comprising a light receiving surface and a primary light emission surface, the light receiving surface is arranged to receive light emitted by the flexible lighting strip and the lighting strip terminator, such that the primary light emission surface is arranged to emit at least a part of the light received via the light receiving surface, and such that the light receiving surface is arranged to define a bending of the flexible lighting strip; and
a coupling structure arranged to mechanically couple the flexible lighting strip and the lighting strip terminator to the light receiving surface in accordance with the bending defined by the light receiving surface.

2. The vehicle light assembly according to claim 1 , wherein the lighting strip terminator comprises a light output surface, wherein the lighting strip terminator is arranged to receive at least a part of the light leaving the flexible lighting strip via the end surface, and wherein the lighting strip terminator is arranged to emit at least a part of the received light via the light output surface.

3. The vehicle light assembly according to claim 1 , wherein the lighting strip terminator is an integrated part of the flexible lighting strip.

4. The vehicle light assembly according to claim 2 , wherein the lighting strip terminator is a separate structure which comprises a coupling interface for optically coupling the lighting strip terminator to the end surface of the flexible lighting strip.

5. The vehicle light assembly according to claim 4 , wherein the flexible lighting strip is arranged such that luminance of the light output surface of the flexible light strip is constant, and wherein the lighting strip terminator is arranged such that luminance of the light output surface of the lighting strip terminator deviates from the luminance of a light output surface of the flexible lighting strip by less than 30%, preferably less than 15% and most preferably less than 10%.

6. The vehicle light assembly according to claim 1 , wherein the lighting strip terminator comprises a base and side walls building a channel, and wherein the lighting strip terminator further comprises a layer for distributing light arranged in the channel.

7. The vehicle light assembly according to claim 6 , wherein inner surfaces of the channel are reflective.

8. The vehicle light assembly according to claim 6 , wherein the inner surfaces are diffusely reflective.

9. The vehicle light assembly according to claim 6 , wherein a cross-section of the channel is reduced with increasing distance to the flexible lighting strip such that a deviation of the luminance of the light output surface of the lighting strip terminator in comparison to the luminance of the light output surface of the flexible lighting strip is reduced.

10. The vehicle light assembly according to claim 9 , wherein the lighting strip terminator further comprises:
a wedge arranged in the channel between the side walls, wherein the wedge is arranged such that reflection of received light in the direction of the light output surface of the lighting strip terminator is homogenized to reduce the deviation of the luminance of the light output surface of the lighting strip terminator in comparison the luminance of the light output surface of the flexible lighting strip.

11. The vehicle light assembly according to claim 6 , wherein the lighting strip terminator further comprises scattering particles, and wherein the scattering particles are arranged such that a deviation of the luminance of the light output surface of the lighting strip terminator in comparison to the luminance of the light output surface of the flexible lighting strip is reduced.

12. The vehicle light assembly according to claim 11 , wherein a concentration of the scattering particles increases with increasing distance to the flexible lighting strip.

13. The vehicle light assembly according to claim 6 , wherein the lighting strip terminator further comprises light absorbing particles, and wherein the light absorbing particles are arranged such that a deviation of the luminance of the light output surface of the lighting strip terminator in comparison to the luminance of the light output surface of the flexible lighting strip is reduced.

14. A vehicle light assembly comprising:
a flexible lighting strip, comprising a plurality of light-emitting diodes, arranged to be bended around at least two linear independent axes;
an optically passive lighting strip terminator coupled to a lateral end surface of the flexible lighting strip, the lighting strip terminator is perpendicular to the longitudinal extension and a light output surface of the flexible lighting strip, the lighting strip terminator is arranged such that light emitted by the light emitting diodes leaving the flexible lighting strip via the end surface of the flexible lighting strip is at least partly recycled;
a light guiding structure comprising a light receiving surface and a primary light emission surface, the light receiving surface is arranged to receive light emitted by the flexible lighting strip and the lighting strip terminator, such that the primary light emission surface is arranged to emit at least a part of the light received via the light receiving surface, and such that the light receiving surface is arranged to define a bending of the flexible lighting strip;
a coupling structure arranged to mechanically couple the flexible lighting strip and the lighting strip terminator to the light receiving surface in accordance with the bending defined by the light receiving surface; and
an electrical interface arranged to couple the vehicle light assembly to an external power supply.

15. The vehicle light assembly according to claim 1 , wherein the vehicle light assembly is used in a vehicle rear light.

16. The vehicle light assembly according to claim 1 , wherein the vehicle light assembly is used in a vehicle front light.

17. The vehicle light assembly according to claim 14 , wherein the vehicle light assembly is used in a vehicle rear light.

18. The vehicle light assembly according to claim 14 , wherein the vehicle light assembly is used in a vehicle front light.

Assignees

• Lumileds Llc

Inventors

• Crompvoets Floris Maria Hermansz
• Kleijnen Christian
• Spinger Benno

Classifications

• F21W2107/10

  for land vehicles · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21Y2107/70

  on flexible or deformable supports or substrates, e.g. for changing the light source into a desired form · CPC title

• F21Y2103/30

  curved · CPC title

• G02B6/0001

  specially adapted for lighting devices or systems (lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00) · CPC title