US 12,078,892 B2
Light control sheet comprising a liquid crystal layer having a liquid crystal composition with a plurality of spacers having a plurality of discrete peaks in a size distribution and light control device
Toshiji Yasuhara, Taito-ku (JP)
Assigned to TOPPAN Inc., Tokyo (JP)
Filed by TOPPAN Inc., Tokyo (JP)
Filed on Dec. 23, 2021, as Appl. No. 17/560,521.
Application 17/560,521 is a continuation of application No. PCT/JP2020/024089, filed on Jun. 19, 2020.
Claims priority of application No. 2019-121809 (JP), filed on Jun. 28, 2019.
Prior Publication US 2022/0121054 A1, Apr. 21, 2022
Int. Cl. G02F 1/1339 (2006.01); G02F 1/1334 (2006.01); G02F 1/1343 (2006.01); G02F 1/133 (2006.01)
CPC G02F 1/13396 (2021.01) [G02F 1/13392 (2013.01); G02F 1/13439 (2013.01); G02F 1/13306 (2013.01); G02F 1/13345 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A light control sheet, comprising:
a first transparent electrode;
a second transparent electrode; and
a liquid crystal layer formed between the first transparent electrode and the second transparent electrode and comprising a liquid crystal composition and a plurality of spacers dispersed in the liquid crystal layer such that the plurality of spacers includes a plurality of first spacers having a length substantially equal to a thickness of the liquid crystal layer and a plurality of second spacers having a length smaller than the thickness of the liquid crystal layer and that the first and second spacers are dispersed in the liquid crystal layer,
wherein the liquid crystal layer has a uniform thickness and is formed such that the spacers have an average size in a range of 3 μm to 50 μm and a plurality of discrete peaks in a size distribution and that the plurality of discrete peaks includes a first peak derived from the plurality of first spacers and having a mode of size in a range of 8 μm to 50 μm in the size distribution and a second peak derived from the plurality of second spacers and having a mode of size in a range of 3 μm to 7 μm in the size distribution.