Low-Color Scratch-Resistant Articles with a Multilayer Optical Film
First Claim
1. An article comprising:
- a substrate having a surface; and
an optical film disposed on the substrate surface forming a coated surface, the optical film comprising a scratch-resistant layer;
wherein the article comprises a color shift of about 2 or less, when viewed at an incident illumination angle in the range from about 0 degrees to about 60 degrees from normal incidence under an illuminant.
1 Assignment
0 Petitions
Accused Products
Abstract
Embodiments of this disclosure pertain to articles that exhibit scratch-resistance and improved optical properties. In some examples, the article exhibits a color shift of about 2 or less, when viewed at an incident illumination angle in the range from about 0 degrees to about 60 degrees from normal under an illuminant. In one or more embodiments, the articles include a substrate, and an optical film disposed on the substrate. The optical film includes a scratch-resistant layer and an optical interference layer. The optical interference layer may include one or more sub-layers that exhibit different refractive indices. In one example, the optical interference layer includes a first low refractive index sub-layer and a second a second high refractive index sub-layer. In some instances, the optical interference layer may include a third sub-layer.
48 Citations
30 Claims
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1. An article comprising:
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a substrate having a surface; and an optical film disposed on the substrate surface forming a coated surface, the optical film comprising a scratch-resistant layer; wherein the article comprises a color shift of about 2 or less, when viewed at an incident illumination angle in the range from about 0 degrees to about 60 degrees from normal incidence under an illuminant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An article comprising:
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a substrate comprising a substrate surface; and an optical film disposed on the substrate surface forming a coated surface, wherein the optical film comprises a scratch-resistant layer and an optical interference layer disposed between the scratch-resistant layer and the substrate, the optical interference layer comprising at least one set of sub-layers, the set of sub-layers comprising a first low RI sub-layer and a second high RI sub-layer, wherein the article comprises a maximum hardness in the range from about 8 GPa to about 50 GPa, as measured by a Berkovich Indenter Hardness Test along indentation depths of about 100 nm or greater, and wherein the article comprises a color shift of less than about 2, when viewed at an incident illumination angle in the range from about 0 degrees to about 60 degrees from normal incidence under an illuminant. - View Dependent Claims (18, 19, 20)
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21. An article comprising:
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a substrate having a surface; and an optical film disposed on the substrate surface forming a coated surface, the optical film comprising a scratch-resistant layer; wherein the article comprises a color shift of about 2 or less, when viewed at an incident illumination angle in the range from about 0 degrees to about 60 degrees from normal incidence under an illuminant, wherein the article comprises an abrasion resistance comprising about 1% haze or less, as measured using a hazemeter having an aperture, wherein the aperture has a diameter of about 8 mm, and wherein the abrasion resistance is measured after a 500-cycle abrasion using a Taber Test. - View Dependent Claims (22, 23, 24, 25)
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26. An article comprising:
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a substrate having a surface; and an optical film disposed on the substrate surface forming a coated surface, the optical film comprising a scratch-resistant layer; wherein the article comprises a color shift of about 2 or less, when viewed at an incident illumination angle in the range from about 0 degrees to about 60 degrees from normal incidence under an illuminant, wherein the article comprises an abrasion resistance comprising a scattered light intensity of about 0.1 (in units of 1/steradian) or less, at a polar scattering angle in the range from about 15°
to about 60°
, as measured at normal incidence in transmission using an imaging sphere for scatter measurements, with a 2 mm aperture at 600 nm wavelength, andwherein the abrasion resistance is measured after a 500-cycle abrasion using a Taber Test. - View Dependent Claims (27, 28, 29, 30)
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Specification