Antireflection film and display device having hard coating layer with specified surface roughness and internal haze

• US 10,690,810 B2
• Filed: 09/12/2016
• Issued: 06/23/2020
• Est. Priority Date: 09/11/2015
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Chang, Yeong Rae, Shim, Jae Hoon, Seo, Jung Hyun, Park, Jin Young, Lee, Soo Kyoung, Koo, Jae Pil, Kim, Tae Soon, Kim, Min Soo, Hong, Kyung Ki, Moon, Joo Jong, Lee, Hye Min
• Primary Examiner(s): Dunning, Ryan S
• Application Number:
  US15/739,586
• Publication Number:
  US 20180313978A1
• Time in Patent Office: 1,380 Days
• Field of Search: 252582, 252587, 264 124, 264 17, 264 19, 359359, 359360, 359361, 35948801, 359580, 359584, 359585, 359586, 359588, 359589, 359590, 359592, 359593, 359594, 359597, 359599, 359601, 359609, 359614, 359615, 427162, 4271631, 4271632, 427164, 427165, 428 15, 428 16
• CPC Class Codes: C08F 222/10 Esters
• CPC Class Codes: C08G 77/045 containing less than 25 silicon atoms
• CPC Class Codes: C09D 133/04 Homopolymers or copolymers of esters C09D143/04 takes precedence
• CPC Class Codes: C09D 133/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C09D 4/00 Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
• CPC Class Codes: G02B 1/11 Anti-reflection coatings
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: G02F 2201/38 Anti-reflection arrangements

Abstract

The present invention relates to an antireflection film comprising a hard coating layer in which a ten-point average roughness (Rz) of the surface irregularities is 0.05 μm to 0.2 μm and an internal haze is 0.5% to 5%; and a low refractive index layer formed on the hard coating layer, and a display device comprising the antireflection film.

Claims

1. An antireflection film, comprising:

a hard coating layer having a ten-point average roughness (Rz) of the surface irregularities in range of 0.05 μ

m to 0.2 μ

m and an internal haze in range of 2.1% to 5%;

a low refractive index layer formed on the hard coating layer; and

wherein in the result of the diffuse distribution of the reflected light source for the antireflection film, the average value of the ratio of the respective light intensity values to the specular reflection light intensity values at an angle of +1° and

−

1°

from the specular reflection is 0.005 to 0.100,

wherein the result of the diffuse distribution of the reflected light source for the antireflection film applies an incident angle of 45°

, and the specular reflection light intensity value is a reflection diffuse light intensity value at 45°

corresponding to the specular reflection of the incident angle.

2. The antireflection film of claim 1, wherein the hard coating layer has an internal haze in a range of 2.1% to 2.7%.

3. The antireflection film of claim 1, wherein the antireflection film has a reflectivity of 1.6% or less in a wavelength region of 380 nm to 780 nm.

4. The antireflection film of claim 1, wherein the hard coating layer comprises a binder resin including a (co)polymer of a photopolymerizable compound and an organic or inorganic fine particle dispersed in the binder resin.

5. The antireflection film of claim 4, wherein the hard coating layer comprises at least two types of organic or inorganic fine particles, and the difference in the refractive index between at least two types in the at least two types of organic or inorganic fine particles is 0.01 to 0.08.

6. The antireflection film of claim 4, wherein the hard coating layer further comprises an inorganic nanoparticle having a diameter of 1 nm to 150 nm.

7. The antireflection film of claim 4, wherein the binder resin of the hard coating layer further comprises a high molecular weight (co)polymer having a weight average molecular weight of 10,000 or higher.

8. The antireflection film of claim 1, wherein the low refractive index layer comprises a binder resin comprising a (co)polymer of a photopolymerizable compound and a fluorine-containing compound or a silicon-based compound containing a photoreactive functional group.

9. The antireflection film of claim 8, wherein the binder resin of the low refractive index layer comprises polysilsesquioxane in which at least one reactive functional group is substituted.

10. The antireflection film of claim 9, wherein the at least one reactive functional group is selected from the group consisting of an alcohol, an amine, a carboxylic acid, an epoxide, an imide, a (meth)acrylate, a nitrile, a norbornene, an olefin, a polyethylene glycol, a thiol, and a vinyl group.

11. The antireflection film of claim 1, wherein the photoreactive functional group contained in the fluorine-containing compound or silicon-based compound is at least one functional group selected from the group consisting of a (meth)acrylate group, epoxide group, vinyl group, and thiol group.

12. The antireflection film of claim 1, wherein the fluorine-containing compound containing a photoreactive functional group includes at least one selected from the group consisting of

i) an aliphatic compound or an aliphatic cyclic compound in which at least one photoreactive functional group is substituted and at least one fluorine is substituted on at least one carbon;

ii) a heteroaliphatic compound or a heteroaliphatic cyclic compound in which at least one photoreactive functional group is substituted, at least one hydrogen is substituted with fluorine, and at least one carbon is substituted with silicon;

iii) a polydialkylsiloxane-based polymer in which at least one photoreactive functional group is substituted and at least one fluorine is substituted on at least one silicon; and

iv) a polyether compound in which at least one photoreactive functional group is substituted and at least one hydrogen is substituted with fluorine.

13. The antireflection film of claim 1, further comprising an inorganic fine particle dispersed in the binder resin.

14. The antireflection film of claim 13, wherein the inorganic fine particles included in the low refractive index layer include at least one selected from the group consisting of hollow inorganic fine particles having a number average particle diameter of 10 to 200 nm and solid-type inorganic fine particles having a number average particle diameter of 0.5 to 10 nm.

15. The antireflection film of claim 13, wherein the low refractive index layer comprises 10 to 400 parts by weight of the inorganic fine particles and 20 to 300 parts by weight of the fluorine-containing compound or silicon-based compound including a photoreactive functional group based on 100 parts by weight of the (co)polymer of the photopolymerizable compound.

16. The antireflection film of claim 1, wherein the low refractive index layer comprises 0.5 to 40 parts by weight of the polysilsesquioxane in which at least one reactive functional group is substituted, based on 100 parts by weight of the (co)polymer of the photopolymerizable compound.

17. A display device comprising the antireflection film of claim 1.