US 12,448,570 B2
Liquid crystal element and emulsion composition
Hideki Sato, Tokyo (JP)
Assigned to Mitsubishi Chemical Corporation, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Aug. 30, 2023, as Appl. No. 18/239,906.
Application 18/239,906 is a continuation of application No. PCT/JP2022/007810, filed on Feb. 25, 2022.
Claims priority of application No. 2021-031559 (JP), filed on Mar. 1, 2021.
Prior Publication US 2023/0399567 A1, Dec. 14, 2023
Int. Cl. G02F 1/1334 (2006.01); C09K 19/38 (2006.01); C09K 19/60 (2006.01)
CPC C09K 19/601 (2013.01) [C09K 19/38 (2013.01); C09K 19/603 (2013.01); C09K 2219/03 (2013.01); C09K 2219/15 (2013.01); C09K 2219/17 (2013.01)] 20 Claims
 
1. A liquid crystal element comprising:
two substrates having a transparent conductive layer formed thereon, the two substrates being arranged so that the transparent conductive layer is between the two substrates, and
a liquid crystal-polymer composite film sandwiched between the two substrates having a transparent conductive layer,
wherein the liquid crystal-polymer composite film comprises a polymer matrix and a liquid crystal composition surrounded by the polymer matrix,
the liquid crystal composition contains a liquid crystal component and a dichroic dye,
the liquid crystal component has positive dielectric constant anisotropy, and has a nematic phase-isotropic phase transition temperature (an NI point) of 110° C. or higher and 150° C. or lower,
the liquid crystal component has a refractive index anisotropy of 0.01 or more and 0.1 or less, and
the liquid crystal-polymer composite film is switched between a transparent state and a colored state by applying a voltage.