公开(公告)号：US11448924B2

公开(公告)日：2022-09-20

申请号：US17188241

申请日：2021-03-01

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Sohei Abe

IPC: G02F1/1343 ,  G02F1/1339 ,  G02F1/1334

Abstract: A light control device includes a first transparent coating substrate having a first bonding surface, a second transparent coating substrate having a second bonding surface, a light control sheet located between the first and second bonding surfaces, and a transparent adhesive layer that joins the first and second bonding surfaces together around the light control sheet. The light control sheet includes a first transparent electrode film, a second transparent electrode film, and a liquid crystal layer including a liquid crystal composition that fills space between the first transparent electrode film and the second transparent electrode film. The light control sheet has a sheet edge face, and the transparent adhesive layer covers the sheet edge face and has a water absorption rate of 2% or less in accordance with a method of JIS K 7209:2000 A.