US 12,276,883 B2
Transparent base material for liquid crystal device, light control sheet, and light control device
Kaori Morinaga, Taito-ku (JP)
Assigned to TOPPAN HOLDINGS INC., Tokyo (JP)
Filed by TOPPAN HOLDINGS INC., Tokyo (JP)
Filed on Jun. 20, 2024, as Appl. No. 18/748,145.
Application 18/748,145 is a continuation of application No. PCT/JP2022/046659, filed on Dec. 19, 2022.
Claims priority of application No. 2021-207130 (JP), filed on Dec. 21, 2021.
Prior Publication US 2024/0337880 A1, Oct. 10, 2024
Int. Cl. G02F 1/1337 (2006.01); G02F 1/133 (2006.01); G02F 1/1333 (2006.01); G02F 1/1343 (2006.01)
CPC G02F 1/133723 (2013.01) [G02F 1/13306 (2013.01); G02F 1/133305 (2013.01); G02F 1/13439 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A transparent base material for a liquid crystal device, comprising:
a flexible base layer; and
an alignment layer formed on the flexible base layer and formed such that the alignment layer regulates orientations of liquid crystal molecules,
wherein the alignment layer includes polyimide and has a surface such that the surface has an indentation hardness of 0.25 GPa or higher as measured by a nanoindentation test according to ISO 14577-1:2015.