ELECTRO-OPTICAL BLOCKING DEVICE WITH DOUBLE ATTENUATION MODE

摘要

The invention relates to an electro-optical blocking device (100) comprising an assembly of at least two superimposed optical cells, comprising: at least one light absorption cell (110) comprising a layer (115) of a mixture consisting of a host material based on liquid crystal and at least one dichroic guest material; and at least one light diffusion cell (120) comprising a layer (125) of a cholesteric liquid crystal material.