Laminated glass

Patent metadata

Field	Value
Publication number	US-12429722-B2
Application number	US-202318104254-A
Country	US
Kind code	B2
Filing date	Jan 31, 2023
Priority date	Aug 7, 2020
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

To prevent a light control device from being scarred.
A laminated glass 10 comprises a pair of glass plates 11 and 12 , and
a light control device 15 formed between the pair of glass plates 11 and 12 , having a liquid crystal layer 153 , a substrate 151 , a conductive film 152 formed on one surface 151 S 1 of the substrate 151 and a protective film 154 formed on the other surface 151 S 2 of the substrate 151 . The liquid crystal layer has at least one member selected from the group consisting of guest-host liquid crystal, TN liquid crystal, PC liquid crystal, STN liquid crystal, ECB liquid crystal, OCB liquid crystal, IPS liquid crystal and VA liquid crystal. The protective film 154 has abrasion resistance higher than that of the substrate 151.

First claim

What is claimed is:

1. A laminated glass comprising:
a pair of glass plates; and
a light control device formed between the pair of glass plates, the light control device comprising a liquid crystal layer, a substrate, a conductive film formed on one surface of the substrate, and a protective film formed on the other surface of the substrate,
wherein:
the liquid crystal layer has at least one member selected from the group consisting of guest-host liquid crystal, TN liquid crystal, PC liquid crystal, STN liquid crystal, ECB liquid crystal, OCB liquid crystal, IPS liquid crystal and VA liquid crystal,
the protective film has abrasion resistance higher than that of the substrate,
an interlayer is provided in the pair of glass plates, and
the light control device is provided in the interlayer.

2. The laminated glass according to claim 1 , wherein the liquid crystal layer is formed of guest-host liquid crystal.

3. The laminated glass according to claim 1 , wherein the conductive film includes a first conductive film and a second conductive film sandwiching the liquid crystal layer,
the substrate includes a first substrate having the first conductive film formed on one surface and a second substrate having the second conductive film formed on one surface, and
the protective film includes a first protective film formed on the other surface of the first substrate and a second protective film formed on the other surface of the second substrate.

4. The laminated glass according to claim 1 , wherein the protective film contains at least one member selected from the group consisting of a cured product of a polymerization-curable compound having two or more polymerizable functional groups in its molecule, and a cured product of a silicon-based alkoxide compound.

5. The laminated glass according to claim 1 , wherein the substrate contains at least one member selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polyamide, polyether, polysulfone, polyethersulfone, polycarbonate, polystyrene, cyclic polyolefin, polyarylate, polyetherimide, polyether ether ketone, polyimide, aramid, polybutylene terephthalate, triacetyl cellulose, polyurethane and a cycloolefin polymer.

6. The laminated glass according to claim 1 , wherein the light control device contains an ultraviolet absorbing layer.

7. The laminated glass according to claim 6 , wherein the protective film is the ultraviolet absorbing layer.

8. The laminated glass according to claim 6 , wherein, to the intensity of ultraviolet light having a wavelength of 380 nm which enters the laminated glass from outside of one of the pair of glass plates, the intensity of ultraviolet light which progresses inside the laminated glass and enters the liquid crystal layer, is 0% or more and 20% or less.

9. The laminated glass according to claim 1 , wherein the light control device contains an infrared absorbing layer.

10. The laminated glass according to claim 9 , wherein the protective film is the infrared absorbing layer.

11. The laminated glass according to claim 9 , wherein, to the intensity of infrared light having a wavelength of 1,000 nm which enters the laminated glass from outside of one of the pair of glass plates, the intensity of infrared light which progresses inside the laminated glass and enters the liquid crystal layer, is 0% or more and 60% or less.

12. The laminated glass according to claim 1 , wherein the interlayer contains at least one member selected from the group consisting of a plasticized polyvinyl acetal resin, a plasticized polyvinyl chloride resin, a saturated polyester resin, a plasticized saturated polyester resin, a polyurethane resin, a plasticized polyurethane resin, an ethylene/vinyl acetate copolymer resin, an ethylene/ethyl acrylate copolymer resin, a cycloolefin polymer resin and an ionomer resin.

13. The laminated glass according to claim 1 , wherein the interlayer contains at least one of a transparent pressure-sensitive adhesive sheet and a curable transparent resin.

14. The laminated glass according to claim 13 , wherein:
the interlayer comprises a first interlayer and a second interlayer; and
the first interlayer and the second interlayer are formed from a transparent pressure-sensitive adhesive sheet and a curable transparent resin.

15. The laminated glass according to claim 14 , wherein the first interlayer is disposed on a vehicle interior side relative to the second interlayer; and
the first interlayer is the transparent pressure-sensitive adhesive sheet, and the second interlayer is the curable transparent resin; or
the first interlayer is the curable transparent resin, and the second interlayer is the transparent pressure-sensitive adhesive sheet.

16. The laminated glass according to claim 1 , wherein the interlayer has a shear modulus at 25° C. as obtained by dynamic viscoelasticity measurement at a measurement frequency of 1 Hz of 1.0×10 3 Pa or more and 100.0×10 6 Pa or less.

17. The laminated glass according to claim 1 , wherein the liquid crystal layer comprises a light control portion comprising a liquid crystal composition configured to conduct light control and a sealing material configured to seal the outside of the light control portion.

18. The laminated glass according to claim 1 , wherein the substrate extends to the outside of a peripheral portion of the liquid crystal layer in the emission direction.

19. The laminated glass according to claim 1 , wherein the thickness of the interlayer is 0.3 mm or more at a thinnest portion and has a maximum value of 3 mm or less.

20. The laminated glass according to claim 1 , wherein both of the pair of glass plates have a curved shape.

Assignees

• Agc Inc

Inventors

• Shibuya Takashi
• Kakuta Junichi
• Kimura Risa
• Gima Yuhei

Classifications

• G02F2201/50

  Protective arrangements · CPC title

• G02F1/13725

  based on guest-host interaction (G02F1/13762, G02F1/13737, take precedence) · CPC title

• C09J133/00

  Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers · CPC title

• B32B1/00

  Layered products having a non-planar shape · CPC title

• C09D133/00

  Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers · CPC title