Light-transmissive film, manufacturing method therefor, and display device comprising same

Patent metadata

Field	Value
Publication number	US-2023312881-A1
Application number	US-202118001607-A
Country	US
Kind code	A1
Filing date	Jul 7, 2021
Priority date	Jul 10, 2020
Publication date	Oct 5, 2023
Grant date	—

Abstract

One embodiment of the present invention provides a method for manufacturing a light-transmissive film, a light-transmissive film manufactured by the manufacturing method, and a display device comprising the light-transmissive film, the method comprising the steps of: preparing a light-transmissive resin powder; preparing a light-transmissive resin solution by dissolving a first amount of the light-transmissive resin powder in a first solvent; preparing a filler dispersion solution by dispersing a filler in a second solvent; preparing a first mixture solution by mixing the filler dispersion solution and the light-transmissive resin solution; and preparing a second mixture solution by adding a second amount of the light-transmissive resin powder to the first mixture solution and dissolving same.

First claim

1 . A method of producing a light-transmitting film comprising:
preparing a light-transmitting resin powder; dissolving a first amount of the light-transmitting resin powder in a first solvent to prepare a light-transmitting resin solution; dispersing a filler in a second solvent to prepare a filler dispersion; mixing the filler dispersion with the light-transmitting resin solution to prepare a first mixed solution; and adding a second amount of the light-transmitting resin powder to the first mixed solution, followed by dissolution, to prepare a second mixed solution.

2 . The method according to claim 1 ,
wherein the first amount of the light-transmitting resin powder is 0.5 to 10% based on a weight of the filler.

3 . The method according to claim 1 ,
further comprising adding a third solvent to the first mixed solution before adding the second amount of the light-transmitting resin powder to the first mixed solution.

4 . The method according to claim 3 ,
wherein the third solvent is the same as the first solvent.

5 . The method according to claim 1 ,
wherein the second amount of the light-transmitting resin powder is 10 to 200 times the first amount.

6 . The method according to claim 1 ,
wherein the light-transmitting resin comprises an imide repeating unit.

7 . The method according to claim 1 ,
wherein the light-transmitting resin comprises an amide repeating unit.

8 . A light-transmitting film comprising:
a light-transmitting matrix; and a filler dispersed in the light-transmitting matrix, wherein, in an ultra-small-angle X-ray scattering (U-SAXS) graph logarithmically showing a scattering intensity as a function of a wavenumber, the light-transmitting film has a power law slope, which is the slope of the graph in a wavenumber range of 0.01/Å to 0.1/A, of -3.6 to -3.2.

9 . The light-transmitting film according to claim 8 ,
wherein the filler comprises silica (SiO 2 ).

10 . The light-transmitting film according to claim 9 ,
wherein at least a part of the silica (SiO 2 ) is surface-treated with an organic compound having an alkoxy group.

11 . The light-transmitting film according to claim 8 ,
wherein the filler has an average particle diameter of 5 to 50 nm.

12 . The light-transmitting film according to claim 8 ,
wherein the filler is present in an amount of 5 to 46% by weight based on a total weight of the light-transmitting film.

13 . The light-transmitting film according to claim 8 ,
wherein an average shortest distance between adjacent filler particles is between 23 and 45 nm.

14 . The light-transmitting film according to claim 8 ,
wherein the light-transmitting film has a yellow index of 3 or less.

15 . The light-transmitting film according to claim 8 ,
wherein the light-transmitting film has a haze of 1% or less.

16 . The light-transmitting film according to claim 8 ,
wherein the light-transmitting film has a light transmittance of 85% or more.

17 . The light-transmitting film according to claim 8 ,
wherein the light-transmitting film has a Young’s modulus of 4.5 GPa or more and a 2% yield strength of 95 MPa or more.

18 . The light-transmitting film according to claim 8 ,
wherein the light-transmitting matrix comprises an imide repeating unit.

19 . The light-transmitting film according to claim 8 ,
wherein the light-transmitting matrix comprises an amide repeating unit.

20 . A light-transmitting film comprising:
a light-transmitting matrix; and a filler dispersed in the light-transmitting matrix, wherein the filler has an average particle-scattering coefficient (XA) of 0.35 or less, wherein the average particle-scattering coefficient (XA) is calculated in accordance with the following Equation 1:
XA = ∑ k=1 38 X k / 38 ­­­[Equation 1]
wherein X k is calculated in accordance with the following Equation 2:
X k =   π ​ D / λ k ­­­[Equation 2]
wherein k is an integer from 1 to 38,
λ k is 37 +k x10 nm, and
D is a particle size of the filler, measured using transmission electron microscopy (TEM).

21 . The light-transmitting film according to claim 20 ,
wherein the filler has an average particle diameter of 5 to 50 nm.

22 . The light-transmitting film according to claim 20 ,
wherein the filler is present in an amount of 5 to 50% by weight based on the total weight of the light-transmitting film.

23 . The light-transmitting film according to claim 20 ,
wherein the light-transmitting film has a yellow index of 3 or less.

24 . The light-transmitting film according to claim 20 ,
wherein the light-transmitting film has a haze of 1% or less.

25 . The light-transmitting film according to claim 20 ,
wherein the light-transmitting film has a light transmittance of 88% or more.

26 . The light-transmitting film according to claim 20 ,
wherein the light-transmitting film has a Young’s modulus of 5.0 GPa or more.

27 . A display device comprising:
a display panel; and the light-transmitting film according to claim 8 , disposed on the display panel.

Assignees

• Kolon Inc

Inventors

• Shin Hyo Ra
• Park Hyo Jun
• Jung Hak-Gee

Classifications

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title

• H10K50/844

  Encapsulations · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• C08K9/04 Primary

  Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)} · CPC title