Granted Patent B2

US 12,360,290 · App. 18/615,430 · Granted Jul 15, 2025

Inventors: Shandon Dee Hart (Elmira, NY); Karl William Koch, III (Elmira, NY); Carlo Anthony Kosik Williams (Painted Post, NY); Lin Lin (Painted Post, NY); Cameron Robert Nelson (Elmira, NY); James Joseph Price (Corning, NY); Jayantha Senawiratne (Horseheads, NY); Florence Christine Monique Verrier (Corning, NY); David Lee Weidman (Corning, NY)

Assignee: CORNING INCORPORATED

G02B1/11C03C15/00C23C14/021C23C14/042C23C16/0227C23C16/042G02B1/118G02B1/14G02B5/0221G02B5/0268G02B27/4205G02B27/4272G02B2207/101

Abstract

Claims (39)

1. A display article, comprising:

a substrate comprising a thickness and a primary surface;

one of a diffractive surface region and a roughened surface region defined by the primary surface; and

an antireflective coating disposed on the roughened surface region or the diffractive surface region defined by the primary surface of the substrate,

wherein the substrate exhibits a sparkle of less than 5%, as measured by pixel power deviation (PPD 140 ) at an incident angle of 0° from normal, and a transmittance haze of less than 40% from an incident angle of 0° from normal, wherein:

the antireflective coating comprises a plurality of alternating high refractive index and low refractive index layers,

each of the low refractive index layers comprises a refractive index of less than or equal to about 1.8, and each of the high refractive index layers comprises a refractive index of greater than 1.8,

the display article exhibits a first-surface average photopic specular reflectance (% R) of less than 0.3% at any incident angle from about 5° to 20° from normal at wavelengths from 450 nm to 650 nm, and

the display article exhibits a reflected color (√(a* 2 +b* 2 )) from the antireflective coating that is less than 5 for all incident angles from 0° to 60°, as measured with a D65 illuminant.

2. The display article according to claim 1 , wherein, when the display article is disposed over a display, the display article exhibits an ambient contrast ratio that is up to 15 as measured with 100 incidence lux with a D65 illuminant.

3. The display article according to claim 2 , wherein, when the display article is disposed over the display, the display article exhibits a color gamut level of at least 15 for a direct contrast ratio measured with 100 incidence lux with a D65 illuminant.

4. The display article according to claim 1 , wherein the display article exhibits a first-surface average photopic specular reflectance (% R) of less than 0.1% at any incident angle from about 5° to 20° from normal at wavelengths from 450 nm to 650 nm.

5. The display article according to claim 1 , wherein the display article exhibits a maximum hardness of 8 GPa or greater as measured on an air-side surface of the antireflective coating by a Berkovich Indenter Hardness Test along an indentation depth of 50 nm or greater.

6. The display article according to claim 1 , wherein:

the antireflective coating comprises a total physical thickness from 200 nm to 500 nm, and

the antireflective coating comprises a total of three (3) to nine (9) layers.

7. The display article according to claim 1 , wherein the display article comprises the diffractive surface region, the diffractive surface region comprising a plurality of structural features.

8. The display article of claim 7 , wherein the plurality of structural features comprise a plurality of different heights in a multimodal distribution.

9. The display article according to claim 7 , wherein the plurality of structural features further comprises a first portion having a first average height and a second portion having a second average height, wherein the first average height and the second average height have a difference of from 50 nm to 250 nm.

10. The display article of claim 9 , wherein the first portion comprises a first fill fraction that is from 30% to 70% of the diffractive surface region, wherein the second portion comprises a second fill fraction that is 100% minus the first fill fraction.

11. The display article of claim 10 , wherein the first fill fraction is one of 40%, 45%, 50%, 55%, and 60%.

12. The display article of claim 1 , wherein the display article comprises the roughened surface region, the roughened surface region having structural features, wherein a majority of the structural features have a lateral dimension in a range from 1 μm to 125 μm.

13. The display article of claim 12 , wherein the roughened surface region exhibits an average surface roughness (R q ) in RMS variation from 10 nm to 2500 nm.

14. The display article of claim 13 , wherein the display article exhibits a distinctness of image of 80% or less, as measured at an incident angle of 20° from normal.

15. The display article of claim 1 , wherein the display article exhibits a transmittance haze of less than 20%, as measured at an incidence angle of 0° from normal.

16. A display article, comprising:

a substrate comprising a thickness and a primary surface;

one of a diffractive surface region and a roughened surface region defined by the primary surface; and

an antireflective coating disposed on the roughened surface region or the diffractive surface region defined by the primary surface of the substrate,

wherein the substrate exhibits a sparkle of less than 5%, as measured by pixel power deviation (PPD 140 ) at an incident angle of 0° from normal, and a transmittance haze of less than 20% from an incident angle of 0° from normal, wherein:

the antireflective coating comprises a plurality of alternating high refractive index and low refractive index layers,

each of the low refractive index layers comprises a refractive index of less than or equal to about 1.8, and each of the high refractive index layers comprises a refractive index of greater than 1.8,

the antireflective coating comprises a total physical thickness from 200 nm to 500 nm,

the antireflective coating comprises a total of three (3) to nine (9) layers, and

the display article exhibits a reflected color (√(a* 2 +b* 2 )) from the antireflective coating that is less than 5 for all incident angles from 0° to 60°, as measured with a D65 illuminant.

17. The display article according to claim 16 , wherein, when the display article is disposed over a display, the display article exhibits an ambient contrast ratio that is up to 15 as measured with 100 incidence lux with a D65 illuminant.

18. The display article according to claim 17 , wherein, when the display article is disposed over the display, the display article exhibits a color gamut level of at least 15 for a direct contrast ratio measured with 100 incidence lux with a D65 illuminant.

19. The display article according to claim 16 , wherein the display article comprises the diffractive surface region, the diffractive surface region comprising a plurality of structural features, wherein the plurality of structural features further comprises a first portion having a first average height and a second portion having a second average height, wherein the first average height and the second average height have a difference of from 50 nm to 250 nm.

20. The display article of claim 19 , wherein the first portion comprises a first fill fraction that is from 30% to 70% of the diffractive surface region, wherein the second portion comprises a second fill fraction that is 100% minus the first fill fraction.

Assignments (1)

Continuity (3)

References Cited (400)