Patent ID: 6887531

Claim:
A glare protection device comprising: an active electro-optical filter element ( 2 ), which comprises at least one liquid crystal (LCD) layer ( 5 ) as well as polarisation layers ( 8 , 18 ), with a dedicated electronic control circuit ( 3 ) for controlling the transmission of the active electro-optical filter element ( 2 ), wherein the active electro-optical filter element ( 2 ) practically completely absorbs the ultraviolet (UV) radiation in the spectrum up to 380 nm so that the UV-transmittance of the active electro-optical filter element ( 2 ) in the spectrum up to 380 nm amounts to a maximum of about 0.1%, and wherein the UV-absorption takes place primarily in the polarisation layers ( 8 , 18 ) of the active electro-optical filter element ( 2 ); an infrared (IR) plastic filter ( 10 ) comprising a dye that is stable over time, and that absorbs infrared (IR) radiation in a wavelength range of at least 780 nm to 1400 nm, wherein the IR-plastic filter ( 10 ) is completely joined to the active electro-optical filter element ( 2 ) by means of a compact adhesive layer ( 11 ); and the IR-plastic filter ( 10 ) and the active electro-optical filter element ( 2 ) together form a compact optical and mechanical unit ( 1 ) having a transmittance in the visible range of the spectrum from 400 nm to 650 nm, which amounts to at least 3.2%.