Illuminating glazing unit for a vehicle

1. An illuminating glazing unit for vehicles, comprising:

a first transparent sheet of mineral glass with a first main face, a second main face, and a peripheral edge;

a second transparent sheet of mineral glass with a first main face, a second main face and a peripheral edge;

a transparent lamination interlayer which is in adhesive contact with the second main face of the first sheet and the first main face of the second sheet;

a plurality of light-emitting diodes, each having an emitting face, and

a light extraction element located on one of the first and second main faces of the first transparent sheet,

wherein the first transparent sheet is pierced with a through hole delimited by an internal edge, and wherein the plurality of light-emitting diodes are housed in the through hole, with their emitting faces turned toward the internal edge.

2. The illuminating glazing unit as claimed in claim 1 , wherein the light extraction element is located in the immediate proximity of the through hole, the distance separating the internal edge from the light extraction element being not more than 20 cm.

3. The illuminating glazing unit as claimed in claim 2 , wherein the distance is not more than 5 cm.

4. The illuminating glazing unit as claimed in claim 1 , wherein the light extraction element is an opaque diffusing coating located on the second main face of the first sheet.

5. The illuminating glazing unit as claimed in claim 4 , wherein the opaque diffusing coating is white in color.

6. The illuminating glazing unit as claimed in claim 1 , wherein the light extraction element takes the form of one or more areas arranged around the through hole.

7. The illuminating glazing unit as claimed in claim 6 , wherein the light extraction element takes the form of a pattern with central symmetry, or the form of a pattern with axial symmetry.

8. The illuminating glazing unit as claimed in claim 7 , wherein a center of symmetry of the pattern with central symmetry is superimposed on a center of symmetry of the through hole.

9. The illuminating glazing unit as claimed in claim 7 , wherein an axis of symmetry of the pattern with axial symmetry is superimposed on an axis of symmetry of the through hole.

10. The illuminating glazing unit as claimed in claim 1 , wherein the through hole in which the plurality of light-emitting diodes are housed is closed by a cover.

11. The illuminating glazing unit as claimed in claim 10 , wherein the cover is an opaque cover.

12. The illuminating glazing unit as claimed in claim 10 , wherein the cover is made of a translucent or transparent material, and wherein the glazing unit additionally contains light-emitting diodes located in the through hole whose emitting faces are turned toward the cover.

13. The illuminating glazing unit as claimed in claim 10 , wherein the cover is a removable cover, fixed onto the first main face of the first sheet by reversible fixing means.

14. The illuminating glazing unit as claimed in claim 10 , wherein at least part of the plurality of light-emitting diodes are attached to the cover and spaced apart from the second transparent sheet.

15. The illuminating glazing unit as claimed in claim 1 , wherein the light extraction element is located on the first main face of the first transparent sheet.

16. The illuminating glazing unit as claimed in claim 1 , wherein two of the plurality of light-emitting diodes are housed in the through hole so as to emit light along two different directions toward the internal edge.

17. The illuminating glazing unit as claimed in claim 15 , wherein the two different directions are in opposite directions.

18. A vehicle having an illuminating glazing unit as claimed in claim 1 , wherein the first main face of the first sheet of the glazing unit is in contact with the inside of the vehicle.

19. The vehicle as claimed in claim 18 , wherein the vehicle is a motor vehicle.

20. The vehicle as claimed in claim 19 , wherein the illuminating glazing unit is part of a roof of the vehicle.