Light-scattering liquid crystal device

Patent metadata

Field	Value
Publication number	US-11360342-B2
Application number	US-201915734286-A
Country	US
Kind code	B2
Filing date	Jul 23, 2019
Priority date	Jul 25, 2018
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

The present invention relates to light-scattering liquid crystal devices suited for use in light control glass such as optical shutters and use in segment displays in, for example, clocks. A light-scattering liquid crystal device according to the present invention includes two substrates 1, of which at least one includes an electrode layer 2 and at least one is transparent, and a light control layer 4 held between the substrates, the light control layer 4 containing a liquid crystal material and a polymer substance, wherein the light-scattering liquid crystal device includes, between the substrates and the light control layer, a thin film layer 3 formed by subjecting a thermally curable compound containing a reactive group to thermal curing. According to the present invention, a light-scattering liquid crystal device having dramatically improved adhesion can be provided.

First claim

The invention claimed is:

1. A light-scattering liquid crystal device comprising:
a first substrate having a first electrode provided thereon;
a second substrate having a second electrode provided thereon, wherein at least one of the first substrate and the second substrate is transparent;
a light control layer between the first electrode and the second electrode, the light control layer containing a liquid crystal material and a polymer substance;
a first thin film layer formed between the first electrode and the light control layer, the light control layer contacting the first thin film layer; and

a second thin film layer formed between the second electrode and the light control layer, the light control layer contacting the second thin film layer, wherein each of the first thin film layer and the second thin film layer is formed by subjecting a thermally curable compound containing a reactive group to thermal curing or by subjecting an ionizing radiation-curable compound containing a reactive group to ionizing radiation curing,
wherein the polymer substance obtained by polymerizing monomer comprising:
a monofunctional acrylic or methacrylic polymerizable compound represented by General Formula (II-2),

wherein Y 1 represents a hydrogen atom or a methyl group and X 2 represents an alkyl group having 8 to 30 carbon atoms which can be branched, in which one or two or more non-adjacent —CH 2 — can each independently be substituted with an oxygen atom, —COO—, or —OCO—; and
a bifunctional acrylic or methacrylic polymerizable compound.

2. The light-scattering liquid crystal device according to claim 1 , wherein the thin film has a thickness of 10 nm to 1000 nm.

3. The light-scattering liquid crystal device according to claim 1 , wherein the reactive group is (P-1) to (P-21):

4. The light-scattering liquid crystal device according to claim 1 , wherein the reactive group contains (P-1) or (P-2).

Assignees

• Dainippon Ink & Chemicals

Inventors

• Nakata Hidetoshi
• JANG Keumhee
• Maruyama Kazunori

Classifications

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G02F1/133504

  Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606) · CPC title

• G02F1/137

  characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering · CPC title

• C09D135/02

  Homopolymers or copolymers of esters (C09D135/06, C09D135/08 take precedence) · CPC title

• C08F222/102

  of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate · CPC title