Light modulating device

Patent metadata

Field	Value
Publication number	US-12174479-B2
Application number	US-202318370449-A
Country	US
Kind code	B2
Filing date	Sep 20, 2023
Priority date	May 24, 2016
Publication date	Dec 24, 2024
Grant date	Dec 24, 2024

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 comprising one or a plurality of glass plates and having a three-dimensional curved surface;
a light modulating cell configured to change between a light shielding state and a light transmitting state, the light modulating cell comprising:
a first laminated body comprising:
a first resin substrate;
a first transparent electrode;
a first E-type linear polarizing plate; and
a first alignment layer;

a second laminated body comprising:
a second resin substrate;
a second E-type linear polarizing plate; and
a second alignment layer;

a liquid crystal layer of a guest-host type that is disposed between the first laminated body and the second laminated body and contains a dichroic dye;
a sealing member that defines a liquid crystal space of the liquid crystal layer between the first alignment layer and the second alignment layer; and
a plurality of spacers that define a thickness of the liquid crystal layer; and
an optically transparent adhesive film that 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,

wherein:
the first laminated body has an extension portion being extended to an outside of the sealing member and being pasted to the curved surface of the light transmissive plate, and
a length in a width direction of the sealing member is not less than 1 mm and not more than 5 mm.

2. The light modulating device according to claim 1 , wherein at least one of the light modulating cell and the light transmissive plate further comprises an anti-reflection layer.

3. The light modulating device according to claim 1 , wherein the optically transparent adhesive film has a loss tangent of not less than 0.5 and not more than 1.5.

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

5. A light modulating device comprising:
a light transmissive plate comprising one or a plurality of glass plates and has a curved surface;
a light modulating cell comprising:
a first laminated body;
a second laminated body; and
a liquid crystal layer disposed between the first laminated body and the second laminated body; and

an optically transparent adhesive film that 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,
wherein:
the first laminated body comprises:
a first resin substrate;
a first transparent electrode;
a first alignment layer; and
a first E-type linear polarizing plate provided on a side of the liquid crystal layer on the first resin substrate;

the second laminated body comprises:
a second resin substrate;
a second alignment layer; and
a second E-type linear polarizing plate provided on a side of the liquid crystal layer on the second resin substrate.

6. The light modulating device according to claim 5 , wherein at least one of the light modulating cell and the light transmissive plate further comprises an anti-reflection layer.

7. The light modulating device according to claim 5 , wherein the optically transparent adhesive film has a loss tangent of not less than 0.5 and not more than 1.5.

8. A vehicle comprising the light modulating device according to claim 5 .

9. A light modulating device comprising:
a light transmissive plate comprising one or a plurality of glass plates and has a curved surface;
a light modulating cell comprising:
a first laminated body comprising, in sequential order:
a first resin substrate;
a first transparent electrode;
a first E-type linear polarizing plate;
a negative C-plate layer; and
a first alignment layer;

a second laminated body comprising, in sequential order:
a second resin substrate;
a second E-type linear polarizing plate; and
a second alignment layer; and

a liquid crystal layer disposed between the first laminated body and the second laminated body; and

an optically transparent adhesive film that 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.

10. The light modulating device according to claim 9 , wherein at least one of the light modulating cell and the light transmissive plate further comprises an anti-reflection layer.

11. The light modulating device according to claim 9 , wherein the optically transparent adhesive film has a loss tangent of not less than 0 .5 and not more than 1.5.

12. The light modulating device according to claim 9 , wherein:
the first laminated body further comprises an adhesive layer, and
the negative C-plate layer is stacked on the adhesive layer.

13. A vehicle comprising the light modulating device according to claim 9 .

14. A light modulating device comprising:
a light transmissive plate which includes one or a plurality of glass plates and has a curved surface;
a light modulating cell comprising:
a first laminated body comprising, in sequential order:
a first resin substrate;
a first E-type linear polarizing plate;
a negative C-plate layer;
a first transparent electrode; and
a first alignment layer;

a second laminated body comprising, in sequential order:
a second resin substrate;
a second E-type linear polarizing plate; and
a second alignment layer; and

a liquid crystal layer disposed between the first laminated body and the second laminated body; and

an optically transparent adhesive film that 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.

15. The light modulating device according to claim 14 , wherein at least one of the light modulating cell and the light transmissive plate further comprises an anti-reflection layer.

16. The light modulating device according to claim 14 , wherein the optically transparent adhesive film has a loss tangent of not less than 0.5 and not more than 1.5.

17. The light modulating device according to claim 14 , wherein:
the first laminated body further comprises an adhesive layer, and
the negative C-plate layer is stacked on the adhesive layer.

18. A vehicle comprising the light modulating device according to claim 14 .

19. A light modulating device comprising:
a light transmissive plate having a three-dimensional curved surface;
a light modulating cell configured to change between a light shielding state and a light transmitting state, the light modulating cell comprising:
a first laminated body comprising:
a first resin substrate;
a first electrode layer; and
a first alignment layer;

a second laminated body comprising:
a second resin substrate; and
a second alignment layer;

a liquid crystal layer of a guest-host type that is disposed between the first laminated body and the second laminated body and contains a dichroic dye;
a sealing member that defines a liquid crystal space of the liquid crystal layer between the first alignment layer and the second alignment layer; and
a plurality of spacers that define a thickness of the liquid crystal layer; and

an optically transparent adhesive film that is disposed between the curved surface of the light transmissive plate and the light modul

Assignees

• Dainippon Printing Co Ltd

Inventors

• Hagiwara Yusuke

Classifications

• G02F2413/00

  Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates · 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

• G02F1/133528

  Polarisers · CPC title

• G02F1/1333 Primary

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

• G02F1/13

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