Optical laminate, article, and image display apparatus

Patent metadata

Field	Value
Publication number	US-12313817-B2
Application number	US-202217655926-A
Country	US
Kind code	B2
Filing date	Mar 22, 2022
Priority date	Mar 25, 2021
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

This optical laminate includes a transparent base material, a hard coat layer, an optical function layer, and an anti-fouling layer, which are laminated in that order, in which the hard coat layer contains a filler, the hard coat layer has a thickness of 3 μm or more and 25 μm or less, and a 10-point average roughness Rz of a surface of the optical laminate is 19 nm or more and 100 nm or less.

First claim

What is claimed is:

1. An optical laminate comprising:
a transparent base material;
a hard coat layer;
an optical function layer; and
an anti-fouling layer, which are laminated in that order, wherein the hard coat layer contains a filler, wherein the hard coat layer has a thickness of 3 μm or more and 25 μm or less, wherein a 10-point average roughness Rz of a surface of the optical laminate is 19 nm or more and 100 nm or less, and wherein an apparent average particle diameter of an aggregate of the filler, which is obtained by measuring the surface of the optical laminate with an atomic force microscope, is 150 nm or more and 2200 nm or less.

2. The optical laminate according to claim 1 , wherein an apparent average particle diameter of an aggregate of the filler, which is obtained by measuring a surface of the hard coat layer with an atomic force microscope, is 110 nm or more and 1600 nm or less.

3. The optical laminate according to claim 1 , wherein the optical function layer includes at least a low refractive index layer.

4. The optical laminate according to claim 1 , wherein a low refractive index layer and a high refractive index layer are alternately laminated in the optical function layer.

5. The optical laminate according to claim 1 , wherein a value of a water contact angle after 2000 cycles of a steel wool sliding test is 84% or more of a value of a water contact angle before the steel wool sliding test.

6. The optical laminate according to claim 1 , wherein the anti-fouling layer includes a fluorine-based compound.

7. An article comprising:
the optical laminate according to claim 1 .

8. An image display apparatus comprising:
a screen; and
the optical laminate according to claim 1 , which is formed on a surface of the screen.

9. An optical laminate comprising:
a transparent base material;
a hard coat layer;
an optical function layer, and
an anti-fouling layer, which are laminated in that order, wherein the hard coat layer contains a filler, wherein the hard coat layer has a thickness of 3 μm or more and 25 μm or less, wherein a 10-point average roughness Rz of a surface of the optical laminate is 19 nm or more and 100 nm or less, and wherein an apparent average particle diameter of an aggregate of the filler, which is obtained by measuring a surface of the hard coat layer with an atomic force microscope, is 110 nm or more and 1600 nm or less.

10. An optical laminate comprising:
a transparent base material;
a hard coat layer;
an optical function layer, and
an anti-fouling layer, which are laminated in that order, wherein the hard coat layer contains a filler, wherein the hard coat layer has a thickness of 3 μm or more and 25 μm or less, wherein a 10-point average roughness Rz of a surface of the optical laminate is 19 nm or more and 100 nm or less, and wherein a value of a water contact angle after 2000 cycles of a steel wool sliding test is 84% or more of a value of a water contact angle before the steel wool sliding test.

Assignees

• Dexerials Corp

Inventors

• Ono Tetsuya
• Nakanishi Daichi
• KIBUSHI Yuko

Classifications

• G02B1/18 Primary

  Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films (G02B1/16 takes precedence) · CPC title

• B32B2309/105

  Thickness · CPC title

• G02B1/005

  made of photonic crystals or photonic band gap materials (photonic band-gap structures or photonic lattices in integrated optics G02B6/1225; photonic band-gap structures or photonic lattices in optical fibres G02B6/02295) · CPC title

• B32B7/023

  Optical properties · CPC title

• G02B1/115

  Multilayers · CPC title