A projection assembly for a head-up display (HUD), includes a windshield with an HUD region, inner and outer panes joined via a thermoplastic intermediate layer, and a projector directed at the HUD region having a radiation predominantly p-polarized. The windshield has a reflection coating for reflecting p-polarized radiation. The reflection coating has exactly one electrically conductive layer based on silver. A lower dielectric layer or layer sequence with a refractive index of at least 1.9 is arranged below the electrically conductive layer. An upper dielectric layer or layer sequence with a refractive index of at least 1.9 is arranged above the electrically conductive layer. The ratio of the optical thickness of the upper dielectric layer or layer sequence to the optical thickness of the lower dielectric layer or layer sequence is between 2.10 and 3.20. The reflection coating includes no dielectric layers with a refractive index less than 1.9.
PROJECTION ASSEMBLY FOR A HEAD-UP DISPLAY (HUD) WITH P-POLARIZED RADIATION
28.12.2023
Patent
Elektronische Ressource
Englisch
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