US 12,455,471 B2
Light control sheet
Taisuke Enya, Taito-ku (JP)
Assigned to TOPPAN Inc., Taito-ku (JP)
Filed by TOPPAN Inc., Taito-ku (JP)
Filed on May 1, 2023, as Appl. No. 18/309,959.
Application 18/309,959 is a continuation of application No. PCT/JP2021/041745, filed on Nov. 12, 2021.
Claims priority of application No. 2020-189124 (JP), filed on Nov. 13, 2020.
Prior Publication US 2023/0266614 A1, Aug. 24, 2023
Int. Cl. G02F 1/1334 (2006.01); G02F 1/1333 (2006.01); G02F 1/1339 (2006.01); G02F 1/137 (2006.01); G02F 1/1335 (2006.01); G02F 1/1343 (2006.01)
CPC G02F 1/1334 (2013.01) [G02F 1/133365 (2013.01); G02F 1/13392 (2013.01); G02F 1/13775 (2021.01); G02F 1/133502 (2013.01); G02F 1/13398 (2021.01); G02F 1/13439 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A light control sheet, comprising:
a first transparent substrate;
a second transparent substrate facing the first transparent substrate;
a first transparent electrode layer formed on the first transparent substrate;
a second transparent electrode layer formed on the second transparent substrate;
a light control layer formed between the first transparent electrode layer formed on the first transparent substrate and the second transparent electrode layer formed on the second transparent substrate; and
a plurality of spacers formed in the light control layer and comprising polymethyl methacrylate such that the spacers are dispersed in the light control layer between the first transparent electrode layer and the second transparent electrode layer,
wherein
the light control layer includes a transparent polymer layer forming a polymer network such that the transparent polymer layer has voids formed in the polymer network and a liquid crystal composition including liquid crystal molecules filling the voids in the polymer network,
the polymer network of the transparent polymer layer in the light control layer has a three-dimensional mesh shape and comprises a polymer in which plural types of unit structures have been polymerized,
the unit structures include a unit structure comprising an aromatic ring, and
an average number of the aromatic ring in the unit structures in the transparent polymer layer is 0.4 or more per unit structure.