Process for obtaining a light-scattering assembly in particular for a motor vehicle

Patent metadata

Field	Value
Publication number	US-10648638-B2
Application number	US-201715718131-A
Country	US
Kind code	B2
Filing date	Sep 28, 2017
Priority date	Sep 28, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

The invention relates to a process for obtaining a light-scattering assembly in particular for a motor vehicle, the light-scattering assembly comprising a part including first and second sections. The process includes forming, by injection molding, the first section of the light-scattering assembly, the first section forming a transparent scattering screen having microstructures obtained by injection molding and configured to scatter light passing through said first section, and forming, by injection molding, the second section, the second section being devoid of microstructures obtained by injection molding and configured to scatter light. The second section has an external region extending around at least some of the perimeter of the first section, the external region extending beyond a peripheral portion of the first section [and away from the first section, the first and second sections being formed in contact with each other and being united with each other.

First claim

The invention claimed is:

1. A process for obtaining a light-scattering assembly for a motor vehicle, the light-scattering assembly comprising first and second sections, the process comprising:
forming, by injection molding, the first section of the light-scattering assembly, the first section comprising a transparent scattering screen having microstructures obtained by injection molding and configured to scatter light emitted by a light-emitting source and passing through the first section; and
forming, by injection molding, the second section, the second section being devoid of microstructures obtained by injection molding, the second section comprising an external region extending around at least some of the perimeter of the first section, the external region extending beyond a peripheral portion of the first section and away from the first section,
the first and second sections being formed in contact with each other and being integral with each other, the first and second sections facing the light-emitting source and being interposed on the optical path of at least some of the light emitted from the light-emitting source towards an output lens and arranged between the light-emitting source and the output lens, wherein
the microstructures are arranged in the first section on a first face of the first section and the first section makes contact with the second section only via a second face of the first section opposite the first face, the first face of the first section facing the output lens, the output lens being on the opposite side of the light-emitting source relative to the first section, wherein
the light-emitting source is disposed along a direction perpendicular to the transparent scattering screen having microstructures and the transparent scattering screen receives light directly from the light-emitting source.

2. The process according to claim 1 , wherein the microstructures of the first section are arranged within a scattering region of the first section, the second section having an internal region that is arranged facing a peripheral portion of the scattering region around at least some of the perimeter of the scattering region.

3. The process according to claim 1 , wherein the second section is opaque.

4. The process according to claim 1 , wherein the second section is transparent.

5. The process according to claim 1 , wherein the first and second sections are formed by bi-injection molding.

6. The process according to claim 1 , wherein the first and second sections are produced from different materials.

7. The process according to claim 1 , wherein the first and second sections are produced from the same material.

8. The process according to claim 1 , wherein the second section includes a fastener suitable for fastening the light-scattering assembly to a receiving structure.

9. The process according to claim 1 , further comprising gripping the light-scattering assembly, the grip being achieved solely by handling the light-scattering assembly via the second section.

10. The process according to claim 2 wherein the second section is opaque.

11. The process according to claim 2 , wherein the second section is transparent.

12. The process according to claim 2 , wherein the first and second sections are formed by bi-injection molding.

13. A light-scattering assembly for a motor vehicle, the light-scattering assembly comprising:
a first section forming a transparent scattering screen having microstructures obtained by injection molding and configured to scatter light emitted by a light-emitting source and passing through the first section; and
a second section, the second section being devoid of microstructures obtained by injection molding, the second section comprising an external region extending around at least some of the perimeter of the first section, the external region extending beyond a peripheral portion of the first section and away from the first section,
the first and second sections making contact with each other and being integral with each other, the first and second sections facing the light-emitting source and being interposed on the optical path of at least some of the light emitted from the light-emitting source towards an output lens and arranged between the light-emitting source and the output lens, wherein
the microstructures are arranged in the first section on a first face of the first section and the first section makes contact with the second section only via a second face of the first section opposite the first face, the first face of the first section facing the output lens, the output lens being on the opposite side of the light-emitting source relative to the first section, wherein
the light-emitting source is disposed along a direction perpendicular to the transparent scattering screen having microstructures and the transparent scattering screen receives light directly from the light-emitting source.

14. The light-scattering assembly according to claim 13 , wherein the microstructures of the first section are arranged in the first section within a scattering region, the second section having an internal region that is arranged facing a peripheral portion of the scattering region around at least some of the perimeter of the scattering region.

15. The light-scattering assembly according to claim 13 , wherein the first and second sections are produced from different materials.

16. The light-scattering assembly according to claim 13 , wherein the second section is opaque.

17. A light-emitting device for a motor vehicle, the light-emitting device comprising:
a light-emitting source for emitting light; and
a light-scattering assembly, the light-scattering assembly comprising:
a first section forming a transparent scattering screen having microstructures obtained by injection molding and configured to scatter light emitted by the light-emitting source and passing through the first section; and
a second section, the second section being devoid of microstructures obtained by injection molding, the second section comprising an external region extending around at least some of the perimeter of the first section, the external region extending beyond a peripheral portion of the first section and away from the first section,
the first and second sections making contact with each other and being integral with each other, the first and second sections facing the light-emitting source and being interposed on the optical path of at least some of the light emitted from the active light-emitting source towards an output lens and arranged between the light-emitting source and the output lens, wherein

the microstructures are arranged in the first section on a first face of the first section and the first section makes contact with the second section only via a second face of the first section opposite the first face, the first face of the first section facing the output lens, the output lens being on the opposite side of the light-emitting source relative to the first section, wherein
the light-emitting source is disposed along a direction perpendicular to the transparent scattering screen having microstructures and the transparent scattering screen receives light directly from the light-emitting source.

18. The light-emitting device according to claim 17 , the light-emitting device being a lighting and/or signaling device for a motor vehicle.

Assignees

• Valeo Vision

Inventors

• Zhu Lingxuan

Classifications

• F21S41/00

  Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps (reversing lights F21S43/00) · CPC title

• B29K2995/0026

  Transparent · CPC title

• F21S43/15

  Strips of light sources · CPC title

• F21S43/27

  Attachment thereof · CPC title

• B29C45/16

  Making multilayered or multicoloured articles {(B29C45/0062 takes precedence; feeding colouring materials into the injection unit B29C45/1816)} · CPC title