Illuminable glazing with multilayer light coupling means
A glazing assembly includes a first pane having a first main surface and a second main surface, wherein the first pane is provided to at least partially transmit coupled-in light, a light source for generating light that can be coupled into the first pane, a second pane having a first main surface and a second main surface, an intermediate layer arranged between the first pane and the second pane, and a light coupling unit which is arranged in the intermediate layer, wherein the light coupling unit is formed from a multilayer film, wherein the multilayer film includes at least one carrier layer and a microprism film.
1 . A glazing assembly comprising:
a first pane having a first main surface and a second main surface, wherein the first pane is provided to at least partially transmit coupled-in light,
a light source for generating light that is coupled into the first pane,
a second pane having a first main surface and a second main surface,
an intermediate layer arranged between the first pane and the second pane,
a light coupling means which is arranged in a cutout of at least one thermoplastic layer of the intermediate layer,
wherein the light coupling means is formed from a multilayer film, wherein the multilayer film comprises at least one carrier layer and a microprism film.
2 . The glazing assembly according to claim 1 , wherein a height of the light coupling means corresponds approximately to a height of said at least one thermoplastic layer of the intermediate layer.
3 . The glazing assembly according to claim 1 , wherein the light coupling means is arranged in a tinted region of the intermediate layer.
4 . The glazing assembly according to claim 3 , wherein the light coupling means is arranged in a blackened region of the intermediate layer.
5 . The glazing assembly according to claim 1 , wherein the microprism film of the multilayer film of the light coupling means has a height in the range between 25 μm and 500 μm.
6 . The glazing assembly according to claim 5 , wherein the microprism film of the multilayer film of the light coupling means has a height in the range between 25 μm and 400 μm.
7 . The glazing assembly according to claim 6 , wherein the microprism film of the multilayer film of the light coupling means has a height greater than or equal to 150 μm and less than or equal to 350 μm.
8 . The glazing assembly according to claim 1 , wherein the light source comprises at least one light-emitting diode.
9 . The glazing assembly according to claim 8 , wherein the light source comprises a plurality of light-emitting diodes.
10 . A method comprising providing a glazing assembly according to claim 1 as a roof pane of a vehicle.
11 . A method for producing a glazing assembly that includes a first pane having a first main surface and a second main surface, wherein the first pane is provided to at least partially transmit coupled-in light, a light source for generating light that is coupled into the first pane, a second pane having a first main surface and a second main surface, an intermediate layer arranged between the first pane and the second pane, a light coupling means which is arranged in the intermediate layer, wherein the light coupling means is formed from a multilayer film, wherein the multilayer film comprises at least one carrier layer and a microprism film, the method, comprising:
laminating the multilayer film comprising the at least one carrier layer and the microprism film and thereby providing the light coupling means,
providing the intermediate layer,
making a cutout in at least one thermoplastic layer of the intermediate layer,
cutting the multilayer film of the light coupling means to size,
inserting the cut piece of the light coupling means into the cutout of said at least one thermoplastic layer of the intermediate layer,
inserting the composite thus formed from intermediate layer and light coupling means between the first pane and the second pane and connecting the elements by lamination,
arranging at least one light source on the first or second pane.
12 . The method according to claim 11 , wherein a height of the laminated multilayer film of the light coupling means corresponds approximately to a height of said at least one thermoplastic layer of the intermediate layer and after inserting the cut-to-size multilayer film into correspondingly designed recesses of the intermediate layer, a height difference is less than 10% of the height of said at least one thermoplastic layer of the intermediate layer.
13 . The method according to claim 12 , wherein the height difference is less than 5% of the height of said at least one thermoplastic layer of the intermediate layer.