Anti-glare film and image display device

Patent metadata

Field	Value
Publication number	US-12560835-B2
Application number	US-202117998460-A
Country	US
Kind code	B2
Filing date	May 14, 2021
Priority date	May 15, 2020
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

An anti-glare film including an anti-glare layer, the anti-glare film having an uneven surface, wherein for amplitude spectrum of elevation of the uneven surface, when a sum of amplitudes corresponding to spatial frequencies of 0.005 μm −1 , 0.010 μm −1 , and 0.015 μm −1 is defined as AM1 and an amplitude at a spatial frequency of 0.300 μm −1 is defined as AM2, AM1 is 0.070 μm or more and 0.400 μm or less, AM2 is 0.0050 μm or more, and AM2<AM1.

First claim

The invention claimed is:

1 . An anti-glare film comprising an anti-glare layer, the anti-glare film having an uneven surface, wherein the uneven surface has a three-dimensional arithmetic mean roughness Sa of 0.30 μm or more, a three-dimensional mean peak interval Smp of 2.524 or more and 8.228 μm or less, and Sa/Smp is 0.05 or more and 0.40 or less.

2 . The anti-glare film according to claim 1 , wherein Sa is 0.30 μm or more and 1.00 μm or less.

3 . The anti-glare film according to claim 1 , wherein the uneven surface has a three-dimensional skewness Ssk of 0.60 or less.

4 . The anti-glare film according to claim 1 , having a haze of 60% or more and 98% or less according to JIS K7136:2000.

5 . The anti-glare film according to claim 1 , wherein the anti-glare layer contains a binder resin and particles.

6 . The anti-glare film according to claim 5 , wherein when a thickness of the anti-glare layer is defined as T and an average particle size of the particles is defined as D, D/T is 0.20 or more and 0.96 or less.

7 . The anti-glare film according to claim 5 , wherein the particles have an average particle size D of 1.0 μm or more and 5.0 μm or less.

8 . The anti-glare film according to claim 5 , wherein the particles are contained in an amount of 40 parts by mass or more and 200 parts by mass or less based on 100 parts by mass of the binder resin.

9 . The anti-glare film according to claim 5 , wherein the particles are organic particles.

10 . The anti-glare film according to claim 5 , wherein the anti-glare layer further contains inorganic fine particles.

11 . The anti-glare film according to claim 10 , wherein the inorganic fine particles are contained in an amount of 40 parts by mass or more and 200 parts by mass or less based on 100 parts by mass of the binder resin.

12 . The anti-glare film according to claim 5 , wherein the binder resin comprises a cured product of an ionizing radiation-curable resin composition and a thermoplastic resin.

13 . The anti-glare film according to claim 1 , further comprising an anti-reflection layer on the anti-glare layer, a surface of the anti-reflection layer being the uneven surface.

14 . An image display device comprising:
a display element; and the anti-glare film according to claim 1 disposed on the display element so that a surface of the anti-glare film on the uneven surface side is disposed so as to face the opposite side to the display element, the anti-glare film being disposed on an outermost surface.

15 . The anti-glare film according to claim 1 , further comprising a transparent substrate on which the anti-glare layer is disposed, wherein a surface of the anti-glare layer opposite to the transparent substrate is the uneven surface of the anti-glare film.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Kuzuhara Mitsuhiro
• Iwata Yukimitsu
• Tsujimoto Jun
• Murakami Shigeki
• Furui Gen

Classifications

• G01J1/0242

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• G02F1/133314

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• G02F1/133331

  Cover glasses · CPC title

• H05B33/02

  Details · CPC title

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title