Patterned Film, Variable-Transmittance Device Comprising Same, and Method for Producing Variable-Transmittance Device

Patent metadata

Field	Value
Publication number	US-2022357607-A1
Application number	US-202117764687-A
Country	US
Kind code	A1
Filing date	Feb 4, 2021
Priority date	Feb 18, 2020
Publication date	Nov 10, 2022
Grant date	—

Abstract

A pattern film, a transmittance variable device comprising the same, and a method for manufacturing a transmittance variable device are disclosed herein. In some embodiments, a pattern film includes a first base layer, and a spacer pattern formed on the first base layer, wherein the spacer pattern comprises a partition wall spacer and a ball spacer, wherein the ball spacer is one of embedded in, partially embedded in, or in contact with the partition wall spacer, and wherein an area of the spacer pattern per unit area of the first base layer is 5% or greater to 17% or less.

First claim

1 . A pattern film, comprising:
a first base layer; and a spacer patterns formed on the first base layer, wherein the spacer pattern comprises a partition wall spacer and a ball spacer, wherein the ball spacer is one of embedded in, partially embedded in or in contact with the partition wall spacer, and wherein a unit area ratio of a unit area of the spacer pattern to a unit area of the first base layer is 5% or greater to 17% or less.

2 . The pattern film of claim 1 , wherein a line width (T) of the partition wall of the partition wall spacer and an average particle diameter (D) of the ball spacer satisfy the following Equation 1:
0≤ T/D≤ 20.  [Equation 1]

3 . The pattern film of claim 1 , wherein the first base layer is an inorganic base layer or an organic base layer.

4 . The pattern film of claim 1 , wherein the spacer pattern has optical density of 0.4 or greater and 4 or less.

5 . The pattern film of claim 1 , wherein the partition wall of the partition wall spacer has a line width of 10 μm or greater and 200 μm or less.

6 . The pattern film of claim 1 , wherein an average value of a height of the partition wall spacer is 2 μm or greater and 100 μm or less, and a standard deviation of the height of the partition wall spacer is 0.05 μm or greater and 0.5 μm or less.

7 . The pattern film of claim 1 , wherein a standard deviation of a particle diameter of the ball spacer is 0.8 μm or less.

8 . The pattern film of claim 1 , wherein the spacer pattern is an irregular pattern.

9 . A transmittance variable device comprising:
the pattern film of claim 1 ; and a second substrate disposed opposite to the pattern film, wherein the first base layer of the pattern film and the second substrate are separated by a space with the pattern film by the space, wherein the space is maintained by the spacer pattern.

10 . The transmittance variable device of claim 9 , wherein the second substrate comprises:
a second base layer; a transparent layer disposed on the second base layer; and an adhesive layer disposed on of the transparent layer, and wherein the adhesive layer is in contact with the spacer pattern.

11 . The transmittance variable device of claim 9 , further comprising an alignment film, wherein the alignment film covers the spacer pattern.

12 . The transmittance variable device of claim 9 , further comprising a light modulation layer provided in the space.

13 . The transmittance variable device of claim 10 , wherein the adhesive layer comprises an adhesive having vertical alignment force.

14 . The transmittance variable device of claim 12 , wherein the light modulation layer comprises a liquid crystal compound and a dichroic dye.

15 . A method for manufacturing a transmittance variable device, the method comprising:
preparing a first laminate by forming an alignment film on the spacer pattern formed first base layer of the pattern film of claim 1 so as to cover the spacer pattern; laminating the first laminate and a second laminate wherein the second laminate comprises a second base layer, a transparent layer disposed on the second base layer, and an adhesive layer disposed on the transparent layer, wherein the adhesive layer of the second laminate is in contact with the alignment film of the first laminate, wherein the spacer pattern maintains a space between the first base layer of the first laminate and the adhesive layer of the second laminate; and forming a light modulation layer in the space.

Assignees

• Lg Chemical Ltd

Inventors

• Song Cheolock
• Seo Han Min
• Bae Nam Seok
• Kim Jinhong
• Gim Minjun

Classifications

• G02F1/13394

  spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence) · CPC title

• G02F1/13398

  Spacer materials; Spacer properties · CPC title

• G02F1/13392 Primary

  spacers dispersed on the cell substrate, e.g. spherical particles, microfibres · CPC title

• G02B5/3016 Primary

  involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528) · CPC title

• G02F1/1335

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