公开(公告)号：US20240361642A1

公开(公告)日：2024-10-31

申请号：US18767161

申请日：2024-07-09

Applicant: TOPPAN HOLDINGS INC.

Inventor： Yoshitaka MATSUBARA

IPC: G02F1/1339 ,  G02F1/1335 ,  G02F1/1343 ,  G02F1/137

CPC classification number: G02F1/13398 ,  G02F1/133514 ,  G02F1/13439 ,  G02F1/137 ,  G02F2202/04

Abstract: A light control sheet includes a light control layer including an organic polymer layer including voids and a liquid crystal composition filling the voids, transparent electrode layers, and transparent support layers. The liquid crystal composition includes a liquid crystal compound and a dichroic dye, the light control layer is sandwiched between the transparent electrode layers, the light control layer and the transparent electrode layers are sandwiched between the transparent support layers, the light control sheet switches from a transparent state to an opaque state exhibiting a first color due to change in alignment of the liquid crystal compound and the dichroic dye in response to change in potential difference between the transparent electrode layers, and a parallel light transmittance PTa in the opaque state and a parallel light transmittance PTb in the transparent state satisfy a relationship PTb/PTa>80.