# US 2025/0208317 A1 · Antiglare articles

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- Number: US 2025/0208317 A1
- Document ID: US20250208317A1
- Status: Published application
- Kind: A1
- Application number: 18/982,025
- Filed: 2024-12-16
- Published: 2025-06-26
- Earliest claimed: 2023-12-21
- Applicants: Corning Incorporated
- Inventors: Christine Cecala; Melanie Lian Geiger; Yuhui Jin; Shenping Li; Cameron Robert Nelson; Florence Christine Monique Verrier; Binwei Zhang
- Web page: https://patentgrep.com/patent/US20250208317A1

## CPC

- G02B 1/11: Anti-reflection coatings
- G02B 1/14: Protective coatings, e.g. hard coatings
- G02B 5/0221: {the surface having an irregular structure (G02B5/0226 takes precedence)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An antiglare article is described herein that includes a substrate including a thickness and a primary surface including a textured region thereon. The the article exhibits, a first-surface absolute specular reflectance of less than or equal to 0.2% at an incident angle 20° from normal, a transmittance haze of less than 35% at an incident angle of 0° from normal, a sparkle of less than 3% at an incident angle of 0° from normal on a 140 PPI device, a distinctness of image of less than 35% at an incident angle of 20° from normal, and a color separation of less than 0.6.

## Claims

### Claim 1

An antiglare article comprising:
a substrate comprising a thickness and a primary surface, the primary surface having on at least a portion thereon a textured region, wherein the antiglare article exhibits:
a first-surface absolute specular reflectance of less than or equal to 0.2% at an incident angle 6° from normal;
a transmittance haze of less than 35% at an incident angle of 0° from normal;
a sparkle of less than 3% at an incident angle of 0° from normal on a 140 PPI device;
a distinctness of image of less than 35% at an incident angle of 20° from normal; and
a color separation of less than 0.6.

### Claim 2 (depends on 1)

The antiglare article of claim 1, wherein the textured region comprises:
a low spatial frequency sub-region and a high spatial frequency sub-region substantially superimposed within the low spatial frequency sub-region.

### Claim 3 (depends on 2)

The antiglare article of claim 2, wherein the high spatial frequency sub-region comprises an ordered pattern.

### Claim 4 (depends on 2)

The antiglare article of claim 2, wherein the high spatial frequency sub-region comprises concave features.

### Claim 5 (depends on 4)

The antiglare article of claim 4, wherein each of the concave features comprises a hexagonal perimeter parallel to a base-plane extending through the substrate disposed below the texture region.

### Claim 6 (depends on 2)

The antiglare article of claim 2, wherein the high spatial frequency sub-region has a period from 10 micron to 30 micron, a surface roughness (Sa) greater than or equal to 100 nm and less than or equal to 400 nm, and feature sizes from 10 μm to 30 μm.

### Claim 7 (depends on 2)

The antiglare article of claim 2, wherein the low spatial frequency sub-region comprises a random distribution.

### Claim 8 (depends on 2)

The antiglare article of claim 2, wherein the low spatial frequency sub-region has a period greater than or equal to 30 μm and less than or equal to 300 μm, a surface roughness greater than or equal to 50 nm and less than or equal to 300 nm, and feature sizes from 100 microns to 300 micron.

### Claim 9 (depends on 1)

The antiglare article of claim 1, wherein the textured region comprises a surface roughness greater than or equal to 200 nm and less than or equal to 500 nm.

### Claim 10 (depends on 1)

The antiglare article of claim 1, wherein the textured region comprises a peak to valley greater than or equal to 1000 nm and less than or equal to 2000 nm.

### Claim 11 (depends on 1)

The antiglare article of claim 1, wherein:
the transmittance haze is greater than or equal to 10% and less than 35%,
the sparkle is greater than or equal to 1.5% and less than or equal to 3.5% at an incident angle of 0° from normal on a 140 PPI device, and
the distinctness of image is greater than or equal to 0% and less than or equal to 30% at an incident angle of 20° from normal.

### Claim 12 (depends on 1)

The antiglare article of claim 1, wherein the substrate comprises a glass substrate, a glass-ceramic substrate, or a ceramic substrate.

### Claim 13 (depends on 1)

The antiglare article of claim 1, wherein the substrate comprises composition comprising:
greater than or equal to 50 mol % and less than or equal to 70 mol % SiO2;
greater than or equal to 10 mol % and less than or equal to 20 mol % Al2O3;
greater than or equal to 0 mol % and less than or equal to 2 mol % P2O5;
greater than or equal to 1 mol % and less than or equal to 6 mol % B2O3;
greater than or equal to 5 mol % and less than or equal to 10 mol % Li2O;
greater than or equal to 1 mol % and less than or equal to 10 mol % Na2O; and
greater than or equal to 0.01 mol % and less than or equal to 1 mol % K2O.

### Claim 14 (depends on 1)

The antiglare article of claim 1, wherein the substrate is an ion-exchanged substrate which comprises a surface compressive stress (CS) greater than or equal to 250 MPa, and a depth of compression (DOC) greater than or equal to 0.1 μm.

### Claim 15 (depends on 1)

The antiglare article of claim 1, further comprising an optical coating disposed on the primary surface, wherein the optical coating is an anti-reflection coating comprising a total reflectance less than 1%.

### Claim 16 (depends on 15)

The antiglare article of claim 15, wherein the antiglare article including the optical coating exhibits a hardness of greater than 8 GPa, as measured by a Berkovich Indenter Hardness test.

### Claim 17 (depends on 1)

The antiglare article of claim 1, further comprising an optical coating disposed on the primary surface, wherein the optical coating is a gradient coating.

### Claim 18 (depends on 1)

The antiglare article of claim 1, further comprising a surface-modifying layer disposed on the primary surface, wherein the surface-modifying layer is one of an anti-smudge or easy-to-clean coating layer.

### Claim 19 (depends on 1)

A display device comprising the antiglare article of claim 1, wherein the antiglare article serves as a protective cover for the display device.

### Claim 20

A display article comprising:
a substrate comprising a thickness and a primary surface, the primary surface having on at least a portion thereon a textured region, the texture region comprising a high spatial frequency sub-region having a period:
period
=
λ
/
(
Sin
[
Arc
⁢
Tan
⁡
(
Psp
/
t
)
]
*
n
)
with an allowable variation of 8 μm or 60%, where t is a thickness of the substrate, n is an average refractive index of the substrate, Psp is a subpixel period, and λ is a pixel light wavelength.