Anti-glare film, polarizer, liquid-crystal panel, and image display device

Patent metadata

Field	Value
Publication number	US-9835768-B2
Application number	US-201615143911-A
Country	US
Kind code	B2
Filing date	May 2, 2016
Priority date	Jul 5, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

An antiglare film, including: a light transmissive substrate; and an antiglare layer that is disposed on a light transmissive substrate and includes a concavo-convex surface, wherein a surface of the antiglare film is a concavo-convex surface; the antiglare film has a total haze value of 0% or more and 5% or less; the antiglare film has an internal haze value of 0% or more and 5% or less; and assuming that a transmission image sharpness of the antiglare film, measured using an optical comb with a width of 0.125 mm, is C (0.125), and that a transmission image sharpness of the antiglare film, measured using an optical comb with a width of 0.25 mm, is C (0.25), an expression (1) and an expression (2) described below are satisfied:

C (0.25)− C (0.125)≧2%  (1); and

C (0.125)≧65%  (2).

First claim

The invention claimed is:

1. An antiglare film, comprising: a light transmissive substrate; and an antiglare layer that is disposed on the light transmissive substrate and comprises a concavo-convex surface, wherein
a surface of the antiglare film is a concavo-convex surface;
the antiglare film has a total haze value of 0% or more and 5% or less; the antiglare film has an internal haze value of 0% or more and 5% or less; and
assuming that the surface of the antiglare film has an arithmetic mean roughness of Ra (100) at a long wavelength cutoff wavelength of 100 μm and that the surface of the antiglare film has an arithmetic mean roughness of Ra (100-1000) at a short wavelength cutoff wavelength of 100 μm and at a long wavelength cutoff wavelength of 1000 μm, an expression (3) and an expression (4) described below are satisfied:
Ra (100)/ Ra (100-1000)≦0.5  (1); and

0.04 μm≦ Ra (100-1000)≦0.12 μm  (2),

the antiglare layer comprises a binder resin and inorganic oxide fine particles, and
the inorganic oxide fine particles have an average primary particle diameter of 1 nm or more and 100 nm or less.

2. The antiglare film according to claim 1 , wherein the concavo-convex surface of the antiglare layer is the surface of the antiglare film.

3. The antiglare film according to claim 1 , further comprising a functional layer disposed on the antiglare layer, a surface of the functional layer being the surface of the antiglare film.

4. The antiglare film according to claim 1 , wherein the inorganic oxide fine particles are inorganic oxide fine particles of which surfaces are subjected to hydrophobization treatment.

5. The antiglare film according to claim 1 , wherein the inorganic oxide fine particles form an aggregate in the antiglare layer; and the aggregate has an average particle diameter of 100 nm or more and 2.0 μm or less.

6. The antiglare film according to claim 1 , wherein the antiglare film has a total haze value of 0% or more and 1% or less; and the antiglare film has an internal haze value of substantially 0%.

7. A polarizing plate, comprising:
the antiglare film according to claim 1 ; and
a polarizing element formed on a surface opposite to a surface, on which the antiglare layer is formed, of the light transmissive substrate of the antiglare film.

8. A liquid crystal display panel, comprising the polarizing plate according to claim 7 .

9. An image display apparatus, comprising the polarizing plate according to claim 7 , and comprising 3000 or more horizontal pixels.

10. A liquid crystal display panel, comprising the antiglare film according to claim 1 .

11. An image display apparatus, comprising the antiglare film according to claim 1 , and comprising 3000 or more horizontal pixels.

12. The antiglare film according to claim 1 , wherein the Ra(100) satisfies an expression (3) described below:
Ra (100)≦0.03 μm  (3).

Assignees

• Dainippon Printing Co Ltd

Inventors

• Eguchi Junya
• SOTODA Teppei
• Ogumi Shoichiro
• MATSUYAMA Kousuke
• Furui Gen

Classifications

• G02B5/3033

  in the form of a thin sheet or foil, e.g. Polaroid · CPC title

• G02B1/118 Primary

  having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures · CPC title

• G02B5/305 Primary

  including organic materials, e.g. polymeric layers · CPC title

• G02B1/111

  using layers comprising organic materials · CPC title

• G02B5/0294

  adapted to provide an additional optical effect, e.g. anti-reflection or filter · CPC title