公开(公告)号：US12174492B2

公开(公告)日：2024-12-24

申请号：US18487433

申请日：2023-10-16

Applicant: TOPPAN Inc.

Inventor： Yusuke Takahashi ,  Daisuke Yamashita

IPC: G02F1/1337

Abstract: A transparent substrate for a liquid crystal device includes an alignment layer that regulates an alignment direction of liquid crystal molecules contained in a light control layer included in a light control sheet, which is the liquid crystal device, and a base layer on which the alignment layer is formed. The substrate includes a first surface and a second surface opposite to the first surface. The first surface is part of the alignment layer. The second surface is part of the base layer. A surface, which contacts the alignment layer, of the base layer has surface roughness Ra1 of 20 nm or less in a pencil hardness test. A sum Ra1+Ra2 of the surface roughness Ra1 and surface roughness Ra2 of the second surface is 5 nm or more.