Patent ID: 11971519
Assignee: CORNING INCORPORATED
Field: Optics (Instruments)
Classification: CPC G  C | IPC C  G

Claim 8:
9. A display article, comprising:
a substrate comprising a thickness and a primary surface;
a textured surface region defined by the primary surface; and
an antireflective coating disposed on the textured surface region defined by the primary surface of the substrate,
wherein the textured surface region comprises a plurality of structural features and an average texture height (Rtext) from 50 nm to 300 nm, and
wherein the substrate exhibits a sparkle of less than 5%, as measured by pixel power deviation (PPD140) 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 total physical thickness from 200 nm to 500 nm and a plurality of alternating high refractive index layers and low refractive index layers, wherein the antireflective coating comprises a total of three (3) to nine (9) layers,
wherein 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,
wherein each high refractive index layer comprises one of Si3N4, SiNx and SiOxNy, and
further wherein the 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
further wherein the article exhibits a first-surface specular reflectance (% R) from the primary surface of less than 1.1% over the entire wavelength range from 425 nm to 950 nm at all incidence angles from 0° to 45°.