US 12,072,582 B2
Transparent substrate for liquid crystal device, and light control sheet
Yusuke Takahashi, Taito-ku (JP); and Yuji Kataoka, Taito-ku (JP)
Assigned to TOPPAN Inc., Tokyo (JP)
Filed by TOPPAN Inc., Tokyo (JP)
Filed on Oct. 19, 2023, as Appl. No. 18/490,107.
Application 18/490,107 is a continuation of application No. PCT/JP2022/018614, filed on Apr. 22, 2022.
Claims priority of application No. 2021-072531 (JP), filed on Apr. 22, 2021.
Prior Publication US 2024/0077766 A1, Mar. 7, 2024
Int. Cl. G02F 1/1337 (2006.01)
CPC G02F 1/133788 (2013.01) [G02F 1/133784 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A transparent substrate for a liquid crystal device, comprising:
a base layer; and
an alignment layer formed on the base layer such that the alignment layer has a surface forming a first surface of the transparent substrate and that the base layer has a surface forming a second surface of the transparent substrate on an opposite side with respect to the first surface,
wherein the alignment layer regulates an alignment direction of liquid crystal molecules in a liquid crystal layer of a liquid crystal device, the base layer and the alignment layer are formed such that a coefficient of static friction between the first surface and the second surface is 1.3 or less, and the transparent substrate has a hardness of F or higher in a pencil harness test on the first surface or on a surface of the base layer opposite the second surface.