PROJECTION UNIT FOR HEAD-UP DISPLAY (HUD) WITH P-POLARIZED RADIATION Russian patent published in 2022 - IPC B32B17/10 G02B27/01 G02B5/30 

FIELD: automotive industry.

SUBSTANCE: invention relates to a projection device for a head-up display - a head-up display (HUD) with p-polarized radiation. It contains at least: laminated glass with a HUD zone, containing an outer sheet and an inner sheet, which are connected to each other by a thermoplastic intermediate layer; an electrically conductive coating on the surface facing the intermediate layer of the outer sheet or the inner sheet or in the intermediate layer; and a projector aimed at the HUD area (B); wherein the radiation of the projector is p-polarized, and the laminated glass with an electrically conductive coating in the entire spectral range of 450-650 nm has a degree of reflection of p-polarized radiation of at least 10%, and the electrically conductive coating contains at least three electrically conductive layers, each of which is between two dielectric layers or sequences of dielectric layers, and the sum of the thicknesses of all electrically conductive layers is not more than 30 nm,
and while the electrically conductive layers have a thickness of from 5 nm to 10 nm.

EFFECT: invention provides obtaining a laminated glass of a projection device without a wedge-shaped film and containing an electrically conductive coating, which can also be used as a heated coating, while the HUD projection has a high intensity, the glass has a high light transmission and a pleasant appearance.

12 cl, 5 dwg, 2 tbl