A visibility control device (500) comprises: - one or more light sources (LED1) to provide input light (B0), - a waveguiding substrate (SUB1), which has a first major surface (SRF1) and a second major surface (SRF2), - a plurality of light-deflecting grooves (G1) implemented on at least one major surface (SRF1, SRF2) of the substrate (SUB1), wherein the device (500) is arranged to form guided light (B1) by coupling the input light (B0a) into the substrate (SUB1), wherein the grooves (G1) are arranged to form deflected light (B2) by coupling the guided light (B1a) out of the substrate (SUB1) through the second major surface (SRF2) of the substrate (SUB1).
Patent family as of 12.9.2022
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|IPC||G02B 6/ 00 A I|
|Publication status||Published - 27 Apr 2022|
|MoE publication type||H1 Granted patent|