Anti-glare film, polarizing plate and display apparatus

Patent metadata

Field	Value
Publication number	US-12092794-B2
Application number	US-202017601634-A
Country	US
Kind code	B2
Filing date	Nov 24, 2020
Priority date	Nov 23, 2019
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

The present disclosure relates to an anti-glare film including a light-transmitting substrate; and a hard coating layer containing a binder resin and particles dispersed in the binder resin, a polarizing plate, and a display apparatus including the same, wherein the particles include a first inorganic particle aggregate having an average particle diameter of 1 to 2 μm; a second inorganic particle aggregate having an average particle diameter of 3 to 5 μm; and organic particles in the form of primary particles having an average particle diameter of 1 to 10 μm.

First claim

What is claimed is:

1. An anti-glare film, comprising a light-transmitting substrate; and a hard coating layer containing a binder resin and particles dispersed in the binder resin,
wherein the particles comprise a first inorganic particle aggregate having an average particle diameter of 1 to 2 μm; a second inorganic particle aggregate having an average particle diameter of 3 to 5 μm; and organic particles in the form of primary particles having an average particle diameter of 1 to 10 μm.

2. The anti-glare film of claim 1 ,
wherein a reflection intensity ratio (R) calculated by the following Equation 1 is 0.6 to 1%:
Reflection intensity ratio ( R )=( R 1 /R 2)×100  [Equation 1]

in Equation 1,
R1 is a reflection intensity value measured at 45° corresponding to a regular reflection of an incident angle after irradiating light at the incident angle of 45° to the hard coating layer, and
R2 is a reflection intensity value measured at 45° corresponding to a regular reflection of an incident angle after irradiating light at the incident angle of 45° to the light-transmitting substrate.

3. The anti-glare film of claim 2 ,
wherein a reflection intensity value measured in diffused light of 30 to 35° and 55 to 60° after irradiating light at an incidence angle of 45° to the hard coating layer is 1/10 times the reflection intensity value of R1.

4. The anti-glare film of claim 2 ,
wherein a reflection intensity value measured in diffused light of 20 to 25° and 65 to 70° after irradiating light at an incidence angle of 45° to the hard coating layer is 1/100 times the reflection intensity value of R1.

5. The anti-glare film of claim 1 ,
wherein the first inorganic particle aggregate is in the form of secondary particles in which five or more first inorganic particles in the form of primary particles are aggregated, and
the first inorganic particles in the form of primary particles have an average particle diameter of 50 nm or less.

6. The anti-glare film of claim 1 ,
wherein the second inorganic particle aggregate is in the form of secondary particles in which five or more second inorganic particles in the form of primary particles are aggregated, and
the second inorganic particles in the form of primary particles have an average particle diameter of 50 nm or less.

7. The anti-glare film of claim 1 , wherein an absolute value of a difference in refractive index between the organic particles in the form of primary particles having an average particle diameter of 1 to 10 μm and the binder resin is 0.05 to 0.1.

8. The anti-glare film of claim 1 ,
wherein an average particle diameter ratio of the second inorganic particle aggregate to the first inorganic particle aggregate is 1.5 to 4 times.

9. The anti-glare film of claim 1 ,
wherein a weight ratio of the first inorganic particle aggregate to the second inorganic particle aggregate is 1:0.1 to 5.

10. The anti-glare film of claim 1 ,
wherein a content of the organic particles in the form of primary particles is 30 to 90 parts by weight based on 100 parts by weight of a total weight of the first inorganic particle aggregate and the second inorganic particle aggregate.

11. The anti-glare film of claim 2 ,
wherein the anti-glare film has a ratio of an external haze to the reflection intensity ratio (R) of 15 to 30.

12. The anti-glare film of claim 1 ,
wherein the anti-glare film has a ratio of an external haze to an internal haze of 0.6 to 2.

13. The anti-glare film of claim 1 ,
wherein the binder resin comprises a (co)polymer of a vinyl-based monomer or a (meth)acrylate-based monomer.

14. The anti-glare film of claim 1 ,
wherein the hard coating layer comprises 2 to 10 parts by weight of the organic particles in the form of primary particles based on 100 parts by weight of the binder resin.

15. The anti-glare film of claim 1 ,
wherein the light-transmitting substrate has in-plane retardation (Re) measured at a wavelength of 400 nm to 800 nm of 500 mm or less, or 5000 nm or more.

16. A composition for forming a hard coating layer of an anti-glare film comprising a binder resin and particles dispersed in the binder resin,
wherein the particles comprise a first inorganic particle aggregate having an average particle diameter of 1 to 2 μm; a second inorganic particle aggregate having an average particle diameter of 3 to 5 μm; and organic particles in the form of primary particles having an average particle diameter of 1 to 10 μm.

17. A polarizing plate comprising the anti-glare film of claim 1 .

18. A display apparatus comprising the anti-glare film of claim 1 .

19. The anti-glare film of claim 1 ,
wherein the first inorganic particle aggregate and the second inorganic particle aggregate is at least one selected from the group consisting of silicon oxide, titanium dioxide, indium oxide, tin oxide, zirconium oxide, zinc oxide, and polysilsesquioxane particles.

20. The anti-glare film of claim 1 ,
wherein the organic particles in the form of primary particles is anyone or a copolymer of two or more selected from the group of polystyrene, polymethyl methacrylate, polymethyl acrylate, polyacrylate, polyacrylate-co-styrene, polymethylacrylate-co-styrene, polymethyl methacrylate-co-styrene, polycarbonate, polyvinyl chloride, polybutylene terephthalate, polyethylene terephthalate, polyamide, polyimide, polysulfone, polyphenylene oxide, polyacetal, epoxy resin, phenol resin, silicone resin, melamine resin, benzoguamine, polydivinylbenzene, polydivinylbenzene-co-styrene, polydivinylbenzene-co-acrylate, polydiallylphthalate, and triallyl isocyanate.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Hanna
• Seo Jung Hyun
• Lee Hye Min
• Chang Yeongrae
• Moon Joo Jong
• Kim Jae Hak

Classifications

• G02F1/133502 Primary

  Antiglare, refractive index matching layers · CPC title

• G02B5/3025

  Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state (G02B5/3008, G02B5/3016 take precedence) · CPC title

• G02B1/14 Primary

  Protective coatings, e.g. hard coatings · CPC title

• G02F1/1335

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

• G02B5/30

  Polarising elements (light-modulating devices with active elements G02F1/00) · CPC title