Projection arrangement for a head-up display (HUD) with p-polarised radiation

US12337574B2 · kind B2 · utility

Assignee

• SAINT-GOBAIN GLASS FRANCE · FR

Inventors

• Klaus Fischer · Augsburg, DE
• Dagmar Schaefer · Portland, US
• Roberto Zimmermann · Solingen, DE
• Jan HAGEN · Bonn, DE

Key dates

• Filing date: Oct 25, 2019
• Grant date: Jun 24, 2025
• Expiry date: Dec 22, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/0194
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A projection arrangement for a head-up display (HUD), includes a composite pane, including an outer and an inner pane connected to one another via a thermoplastic intermediate layer, with an HUD region; an electrically conductive coating on the surface of the outer or inner pane facing the intermediate layer or within the intermediate layer; and a projector that is directed toward the HUD region. The radiation of the projector is p-polarised. The composite pane with the electrically conductive coating has reflectance of at least 10% relative to p-polarised radiation in the spectral range from 450 nm to 650 nm. The electrically conductive coating includes at least three electrically conductive layers, which are each arranged between two dielectric layers or layer sequences. The sum of the thicknesses of all electrically conductive layers is at most 30 nm and the electrically conductive layers have a thickness of 5 nm to 10 nm.