Light modulating device

Patent metadata

Field	Value
Publication number	US-11803076-B2
Application number	US-202217969255-A
Country	US
Kind code	B2
Filing date	Oct 19, 2022
Priority date	May 24, 2016
Publication date	Oct 31, 2023
Grant date	Oct 31, 2023

Abstract

A light modulating device including: a light transmissive plate having a curved surface; a light modulating cell; and an optically transparent adhesive film which is disposed between the curved surface of the light transmissive plate and the light modulating cell and attaches one side of the light modulating cell to the curved surface of the light transmissive plate.

First claim

The invention claimed is:

1. A light modulating device comprising:
a light transmissive plate having a curved surface, the light transmissive plate including a glass plate; and
a light modulating cell, the light transmissive plate having a higher stiffness than a stiffness of the light modulating cell, the light modulating cell comprising:
a first laminated body including a first resin substrate and a first alignment layer;
a second laminated body including a second resin substrate;
a liquid crystal layer containing a dichroic dye and being provided between the first laminated body and the second laminated body;
a sealing member, which is provided between the first laminated body and the second laminated body, defines a space for formation of the liquid crystal layer, the sealing member being disposed in a frame shape surrounding the liquid crystal layer;
a plurality of spacers provided in the space and abutting and supporting the first alignment layer; and
a polarizing plate provided at only one of: (1) a first side of the liquid crystal layer on which the first laminated body is provided; or (2) a second side of the liquid crystal layer on which the second laminated body is provided,

wherein a Vickers hardness value of a portion of the first alignment layer on which the plurality of spacers abut is equal to or greater than 11.8 and is equal to or less than 35.9.

2. The light modulating device according to claim 1 ,
wherein a length of the sealing member in a width direction is at least 1 mm and not more than 5 mm.

3. A vehicle comprising the light modulating device according to claim 1 .

4. A light modulating device comprising:
a first light transmissive plate having a curved surface, the first light transmissive plate including a glass plate;
a second light transmissive plate; and
a light modulating cell which is disposed between the first light transmissive plate and the second light transmissive plate, the first light transmissive plate having a higher stiffness than the light modulating cell, the light modulating cell comprising:
a first laminated body including a first resin substrate and a first alignment layer;
a second laminated body including a second resin substrate;
a liquid crystal layer containing a dichroic dye and being provided between the first laminated body and the second laminated body;
a sealing member, which is provided between the first laminated body and the second laminated body, and that defines a space for formation of the liquid crystal layer, the sealing member being disposed in a frame shape surrounding the liquid crystal layer;
a plurality of spacers provided in the space and abutting and supporting the first alignment layer; and
a polarizing plate provided at only one of: (1) a first side of the liquid crystal layer on which the first laminated body is provided; or (2) a second side of the liquid crystal layer on which the second laminated body is provided,

wherein:
one side of the light modulating cell is attached to the curved surface of the first light transmissive plate,
the second light transmissive plate is attached to another side of the light modulating cell via an adhesive layer, and
a Vickers hardness value of a portion of the first alignment layer on which the plurality of spacers abut is equal to or greater than 11.8 and is equal to or less than 35.9.

5. The light modulating device according to claim 4 ,
wherein a length of the sealing member in a width direction is at least 1 mm and not more than 5 mm.

6. A vehicle comprising the light modulating device according to claim 4 .

Assignees

• Dainippon Printing Co Ltd

Inventors

• Hagiwara Yusuke

Classifications

• G02F1/1334 Primary

  based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals · CPC title

• G02F1/13

  based on liquid crystals, e.g. single liquid crystal display cells · CPC title

• G02F1/1333 Primary

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/1335 Primary

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title

• G02F1/13475

  in which at least one liquid crystal cell or layer is doped with a pleochroic dye, e.g. GH-LC cell (G02F1/13476 takes precedence) · CPC title