Liquid crystal package and manufacturing method for same, optical stack including same, and smart window including same

Patent metadata

Field	Value
Publication number	US-2024353716-A1
Application number	US-202418639930-A
Country	US
Kind code	A1
Filing date	Apr 18, 2024
Priority date	Apr 21, 2023
Publication date	Oct 24, 2024
Grant date	—

Abstract

A liquid crystal package and a manufacturing method for the same, and an optical stack including the same, and a smart window including the same are proposed. The liquid crystal package includes a first protective film, a first alignment film formed on one surface of a first protective film, a second protective film opposing the first protective film, a second alignment film formed on one surface of the second protective film, and opposing the first alignment film, and a liquid crystal layer provided between the first alignment film and the second alignment film, and has a sealed structure with an outer circumferential surface thereof sealed.

First claim

What is claimed is:

1 . A liquid crystal package comprising:
a first protective film; a first alignment film formed on one surface of the first protective film; a second protective film opposing the first protective film; a second alignment film formed on one surface of the second protective film, and opposing the first alignment film; and a liquid crystal layer provided between the first alignment film and the second alignment film, wherein the liquid crystal package has a sealed structure with an outer circumferential surface thereof sealed.

2 . The liquid crystal package of claim 1 , wherein the sealed structure is achieved by thermosetting sealing.

3 . The liquid crystal package of claim 1 , wherein at least a part of regions of the sealed outer circumferential surface has a form protruding outwards from the liquid crystal package.

4 . The liquid crystal package of claim 1 , wherein at least a part of regions of the sealed outer circumferential surface has a form that is curved to form a curved surface on the outer circumferential surface of the liquid crystal package.

5 . The liquid crystal package of claim 1 , wherein at least one protective film from among the first protective film and the second protective film comprises one or more types selected from a group consisting of polyethylene terephthalate (PET), polyethylene isophthalate (PEI), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), diacetyl cellulose, triacetyl cellulose (TAC), polycarbonate (PC), polyethylene (PE), polypropylene (PP), polymethyl acrylate (PMA), polymethyl methacrylate (PMMA), polyethyl acrylate (PEA), polyethyl methacrylate (PEMA), and cyclic olefin polymer (COP).

6 . The liquid crystal package of claim 1 , wherein at least one protective film from among the first protective film and the second protective film has a thickness less than or equal to 50 μm.

7 . A variable transmittance optical stack comprising the liquid crystal package of claim 1 , the variable transmittance optical stack comprising:
a first transparent conductive layer and a first polarizing plate that are stacked on an upper surface of the first protective film; and a second transparent conductive layer and a second polarizing plate that are stacked on an upper surface of the second protective film.

8 . The variable transmittance optical stack of claim 7 , wherein at least one transparent conductive layer from among the first transparent conductive layer and the second transparent conductive layer is formed to come into direct contact with one polarizing plate from among the first polarizing plate and the second polarizing plate.

9 . The variable transmittance optical stack of claim 7 , wherein at least one transparent conductive layer from among the first transparent conductive layer and the second transparent conductive layer comprises one or more types selected from a group consisting of transparent conductive oxide, metal, carbonaceous materials, conductive polymers, conductive ink, and nanowires.

10 . The variable transmittance optical stack of claim 7 , wherein at least one polarizing plate from among the first polarizing plate and the second polarizing plate comprises one or more types selected from a group consisting of a protective layer, a retardation matching layer, and a refractive index-matching layer.

11 . The variable transmittance optical stack of claim 7 , wherein at least one polarizing plate from among the first polarizing plate and the second polarizing plate has a thickness ranging from 30 to 200 μm.

12 . The variable transmittance optical stack of claim 7 , further comprising:
one or more types selected from a group consisting of an overcoat layer, a pressure sensitive adhesive/adhesive layer, and an ultraviolet ray absorption layer.

13 . A smart window comprising the variable transmittance optical stack of claim 7 .

Assignees

• Dongwoo Fine Chem Co Ltd

Inventors

• Kim Hyung-Hun
• Kim Jin-Ho
• Heo Sub

Classifications

• E06B2009/2464

  featuring transparency control by applying voltage, e.g. LCD, electrochromic panels · CPC title

• B60J3/04

  adjustable in transparency · CPC title

• B60J3/06

  using polarising effect · CPC title

• B60J1/00

  Windows; Windscreens; Accessories therefor (B60J10/00 takes precedence; air curtains instead of windows B60J9/04 {; sealing strips for windshields B60J10/70; sealing sash guides for sliding window panes B60J10/74; glass partitions inside vehicles to protect occupants against personal attack B60R21/12}) · CPC title

• E06B9/24

  Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; {Slat blinds}(operating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00) · CPC title