US 12,337,574 B2
Projection arrangement for a head-up display (HUD) with p-polarised radiation
Klaus Fischer, Alsdorf (DE); Dagmar Schaefer, Herzogenrath (DE); Roberto Zimmermann, Solingen (DE); and Jan Hagen, Bonn (DE)
Assigned to SAINT-GOBAIN GLASS FRANCE, Courbevoie (FR)
Appl. No. 17/267,704
Filed by SAINT-GOBAIN GLASS FRANCE, Courbevoie (FR)
PCT Filed Oct. 25, 2019, PCT No. PCT/EP2019/079141
§ 371(c)(1), (2) Date Feb. 10, 2021,
PCT Pub. No. WO2020/194423, PCT Pub. Date May 14, 2020.
Claims priority of application No. 18205414 (EP), filed on Nov. 9, 2018.
Prior Publication US 2021/0316533 A1, Oct. 14, 2021
Int. Cl. B32B 17/10 (2006.01); C03C 17/36 (2006.01); G02B 5/30 (2006.01); G02B 27/01 (2006.01)
CPC B32B 17/10229 (2013.01) [B32B 17/10036 (2013.01); B32B 17/10761 (2013.01); C03C 17/3618 (2013.01); C03C 17/3626 (2013.01); C03C 17/3639 (2013.01); C03C 17/3644 (2013.01); C03C 17/3649 (2013.01); C03C 17/3668 (2013.01); G02B 5/3041 (2013.01); G02B 5/3058 (2013.01); G02B 27/0101 (2013.01); B32B 2255/205 (2013.01); B32B 2255/28 (2013.01); B32B 2307/202 (2013.01); B32B 2307/204 (2013.01); B32B 2307/412 (2013.01); B32B 2311/08 (2013.01); B32B 2311/22 (2013.01); B32B 2315/08 (2013.01); B32B 2457/20 (2013.01); B32B 2605/006 (2013.01); B32B 2605/08 (2013.01); C03C 2217/73 (2013.01); G02B 2027/0194 (2013.01)] 20 Claims
OG exemplary drawing
 
9. Projection arrangement for a head-up display (HUD), comprising:
a composite pane, comprising an outer pane and an inner pane, which are connected to one another via a thermoplastic intermediate layer, with an HUD region;
an electrically conductive coating on a surface of the outer pane or of the inner pane facing the intermediate layer or within the intermediate layer; and
a projector that is directed toward the HUD region;
wherein a radiation of the projector is p-polarised,
wherein the composite pane with the electrically conductive coating has reflectance of at least 10% relative to p-polarised radiation in the entire spectral range from 450 nm to 650 nm, and
wherein the electrically conductive coating includes three electrically conductive layers, which are each arranged between two dielectric layers or layer sequences,
wherein a sum of thicknesses of all three electrically conductive layers is at most 30 nm and wherein the three electrically conductive layers each have a thickness of 5 nm to 10 nm, and
wherein the electrically conductive coating has sheet resistance of 1 Ω/sq to 2 Ω/sq.