REFLECTING OPTICAL STACK FOR DISPLAY WITH DISPLAY PROTECTION Russian patent published in 2023 - IPC G02F1/1335 

FIELD: lighting.

SUBSTANCE: display device for use in ambient light comprises: a space-time optical modulator (SLM) configured to output light, the SLM includes an output polarizer mounted on an output side of the SLM; an additional polarizer installed on the output side of the output polarizer; a reflective polarizer installed between the output polarizer and the additional polarizer; and a plurality of polar control retarders positioned between the reflective polarizer and the secondary polarizer. The plurality of polar response retarders comprises a switchable liquid crystal retarder comprising a layer of liquid crystal material, and at least one passive polar response control retarder. The plurality of polar response control retarders are configured to, in the switchable state of the switchable liquid crystal retarder, simultaneously not introduce any resulting relative phase shift into orthogonal components of the polarization of light radiation that has passed through the reflective polarizer along an axis directed along the normal to the plane of the set of retarders controlling the polar characteristics, and to introduce the resulting relative phase shift into the orthogonal components of the polarization of light radiation that has passed through the reflective polarizer along the axis inclined relative to the normal to the plane of the set controlling the polar characteristics of retarders.

EFFECT: device provides improved performance to protect the displayed information.

32 cl, 35 dwg, 12 tbl