Illuminating glazing with incorporated deflector

Patent metadata

Field	Value
Publication number	US-9746600-B2
Application number	US-201314399826-A
Country	US
Kind code	B2
Filing date	May 3, 2013
Priority date	May 10, 2012
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A lighting glazing includes a first sheet of glass of refractive index n 1 with a first main face, a second main face and a rim; a transparent polymer film in adhesive contact with the second main face of the first sheet, the film having a refractive index n 2< n 1 ; a light source positioned facing the rim of the first sheet of glass, wherein an area of the second main face of the first sheet of glass is provided with a reflecting relief or else is covered with a transparent flat structure, of refractive index n 3 greater than or equal to n 1 , provided with a reflecting relief.

First claim

The invention claimed is:

1. A lighting glazing comprising:
a first sheet of glass of refractive index n 1 with a first main face, a second main face and a rim;
a transparent polymer film in adhesive contact with the second main face of the first sheet of glass, said transparent polymer film having a refractive index n 2 <n 1 ;
a second sheet of glass with a first main face, a second main face and a rim, the transparent polymer film being in adhesive contact with the first main face of the second sheet of glass, and
a light source positioned facing the rim of the first sheet of glass,
wherein an area of the second main face of the first sheet of glass is provided with a specular reflecting textured surface, and
wherein the specular reflecting textured surface is a textured surface of Fresnel lens type or of Fresnel prism type.

2. The lighting glazing as claimed in claim 1 , wherein a height of the specular reflecting textured surface is between 5 μm and 1 mm.

3. The lighting glazing as claimed in claim 2 , wherein the height of the specular reflecting textured surface is between 10 μm and 500μm.

4. The lighting glazing as claimed in claim 1 , wherein a metallic layer is present on said specular reflecting textured surface.

5. The lighting glazing as claimed in claim 1 , wherein the refractive index n 2 of the transparent polymer film is less by at least 0.02 than the index n 1 of the first sheet of glass.

6. The lighting glazing as claimed in claim 1 , wherein a coating of low index having a refractive index n 4 less by at least 0.02 than the index n 1 of the first sheet of glass is present on said specular reflecting textured surface.

7. The lighting glazing as claimed in claim 6 , wherein the refractive index n 4 is less by at least 0.1 than the index n 1 of the first sheet of glass.

8. The lighting glazing as claimed in claim 1 , wherein the specular reflecting textured surface is a textured surface of Fresnel prism type, the individual prisms of said textured surface being essentially parallel to the lit rim of the first sheet of glass.

9. The lighting glazing as claimed in claim 1 , wherein the specular reflecting textured surface is a textured surface of Fresnel prism type, the individual prisms of said textured surface having an arched form.

10. A vehicle, comprising a lighting glazing as claimed in claim 1 .

11. The vehicle as claimed in claim 10 , wherein the lighting glazing forms part of the roof of the vehicle.

12. The lighting glazing as claimed in claim 1 , wherein the light source includes a light-emitting diode module.

13. A lighting glazing comprising:
a first sheet of glass of refractive index n 1 with a first main face, a second main face and a rim;
a transparent polymer film in adhesive contact with the second main face of the first sheet of glass, said transparent polymer film having a refractive index n 2 <n 1 ;
a second sheet of glass with a first main face, a second main face and a rim, the transparent polymer film being in adhesive contact with the first main face of the second sheet of glass, and
a light source positioned facing the rim of the first sheet of glass,
wherein an area of the second main face of the first sheet of glass is covered with a transparent flat structure, of refractive index n 3 greater than or equal to n 1 , provided with a specular reflecting textured surface.

14. The lighting glazing as claimed in claim 13 , wherein the transparent flat structure is a film of plastic material, or a silica-based mineral or organo-mineral coating obtained by sol-gel pathway.

15. The lighting glazing as claimed in claim 14 , wherein the plastic material is poly(ethylene terephthalate), polycarbonate, poly(methylmethacrylate), or polystyrene.

16. The lighting glazing as claimed in claim 13 , wherein a height of the specular reflecting textured surface is between 5 μm and 1 mm.

17. The lighting glazing as claimed in claim 16 , wherein the height of the specular reflecting textured surface is between 10 μm and 500 μm.

18. The lighting glazing as claimed in claim 13 , wherein a metallic layer is present on said specular reflecting textured surface.

19. The lighting glazing as claimed in claim 13 , wherein the refractive index n 2 of the transparent polymer film is less by at least 0.02 than the index n 3 of the transparent flat structure.

20. The lighting glazing as claimed in claim 13 , wherein a coating of low index having a refractive index n 4 less by at least 0.02 than the index n 3 of the transparent flat structure is present on said specular reflecting textured surface.

21. The lighting glazing as claimed in claim 20 , wherein the refractive index n 4 is less by at least 0.1 than the index n 3 of the transparent flat structure.

22. The lighting glazing as claimed in claim 13 , wherein the specular reflecting textured surface comprises geometrical patterns consisting of flat or curved surfaces.

23. The lighting glazing as claimed in claim 22 , wherein the specular reflecting textured surface is a regular textured surface with repetitive geometrical patterns.

24. The lighting glazing as claimed in claim 13 , wherein the specular reflecting textured surface is a textured surface of Fresnel lens type or of Fresnel prism type.

25. A vehicle, comprising a lighting glazing as claimed in claim 13 .

26. The vehicle as claimed in claim 25 , wherein the lighting glazing forms part of the roof of the vehicle.

27. The lighting glazing as claimed in claim 13 , wherein the light source includes a light-emitting diode module.

Assignees

• Saint Gobain

Inventors

• Massault Laetitia
• Bauerle Pascal
• Kleo Christophe
• Verrat-De-Bailleul Adële
• Berard Mathieu
• Dubost Brice

Classifications

• B60Q3/208

  Sun roofs; Windows · CPC title

• G02B6/0038 Primary

  Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide · CPC title

• G02B6/0095

  Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like · CPC title

• B60Q3/51

  for mounting lighting devices onto vehicle interior, e.g. onto ceiling or floor · CPC title

• B60Q3/64

  for a single lighting device · CPC title