US 12,242,053 B2
Projection assembly for a vehicle, comprising a side pane
Klaus Fischer, Alsdorf (DE); Dagmar Schaefer, Herzogenrath (DE); and Roberto Zimmermann, Solingen (DE)
Assigned to SAINT-GOBAIN GLASS FRANCE, Courbevoie (FR)
Appl. No. 17/261,784
Filed by SAINT-GOBAIN GLASS FRANCE, Courbevoie (FR)
PCT Filed Oct. 9, 2019, PCT No. PCT/EP2019/077362
§ 371(c)(1), (2) Date Jan. 20, 2021,
PCT Pub. No. WO2020/083649, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 18202219 (EP), filed on Oct. 24, 2018.
Prior Publication US 2021/0325672 A1, Oct. 21, 2021
Int. Cl. G02B 27/01 (2006.01); B60K 35/00 (2006.01); G02B 5/30 (2006.01); G02B 27/28 (2006.01); B60K 35/23 (2024.01)
CPC G02B 27/0101 (2013.01) [B60K 35/00 (2013.01); G02B 5/3041 (2013.01); G02B 27/283 (2013.01); B60K 35/23 (2024.01); B60K 2360/23 (2024.01)] 12 Claims
OG exemplary drawing
 
1. A projection assembly for a vehicle, comprising:
a vehicle side pane, which is equipped with a reflective coating, and
a projector, which is directed at a region of the vehicle side pane,
wherein a radiation of the projector is predominately p-polarized, wherein the reflective coating is suitable for reflecting p-polarized radiation, and wherein the vehicle side pane with the reflective coating has, in a spectral range from 400 nm to 650 nm, an average reflectance relative to p-polarized radiation of at least 15%,
wherein the reflective coating includes, alternatingly, optically high-refractive layers with a refractive index greater than 1.8 and optically low-refractive layers with a refractive index less than 1.8, and
wherein at least one of the optically low-refractive layers is implemented as an electrically conductive layer, while the optically high-refractive layers and the remaining optically low-refractive layers are implemented as dielectric layers,
wherein the reflective coating comprises the following layers:
a first optically high-refractive layer based on silicon nitride, tin zinc oxide, silicon zirconium nitride, or titanium oxide with a thickness of 260 nm to 280 nm,
above that, a first optically low-refractive layer based on silicon dioxide with a thickness of 110 nm to 130 nm,
above that, a second optically high-refractive layer based on silicon nitride, tin zinc oxide, silicon zirconium nitride, or titanium oxide, with a thickness of 80 nm to 100 nm,
above that, a second optically low-refractive layer based on silver with a thickness of 5 nm to 15 nm,
above that, a third optically high-refractive layer based on silicon nitride, tin zinc oxide, silicon zirconium nitride, or titanium oxide, with a thickness of 230 nm to 250 nm,
above that, a third optically low-refractive layer based on silicon dioxide with a thickness of 190 nm to 210 nm,
above that, a fourth optically high-refractive layer based on silicon nitride, tin zinc oxide, silicon zirconium nitride, or titanium oxide, with a thickness of 120 nm to 140 nm.