Durable and scratch-resistant anti-reflective articles
First Claim
1. A device comprising:
- a display comprising a user interface;
a cover article disposed over the display, the cover article comprising a substrate having a major surface; and
an optical coating disposed on the major surface and forming an anti-reflective surface, the optical coating comprising an anti-reflective coating,wherein the cover article exhibits a maximum hardness of about 10 GPa to about 30 GPa along an indentation depth of 600 nm from the anti-reflective surface; and
wherein the cover article exhibits a single side average light transmittance measured at the anti-reflective surface of about 92% or more over an optical wavelength regime in the range from about 400 nm to about 800 nm and either one or both of;
article transmittance color coordinates in the (L*, a*, b*) colorimetry system at normal incidence under an International Commission on Illumination illuminant exhibiting a reference point color shift of less than about 2 from a reference point as measured at the anti-reflective surface, the reference point comprising at least one of the color coordinates (a*=0, b*=0) and the transmittance color coordinates of the substrate, andarticle reflectance color coordinates in the (L*, a*, b*) colorimetry system at normal incidence under an International Commission on Illumination illuminant exhibiting a reference point color shift of less than about 5 from a reference point as measured at the anti-reflective surface, the reference point comprising at least one of the color coordinates (a*=0, b*=0), the color coordinates (a*=−
2, b*=−
2), and the reflectance color coordinates of the substrate,wherein, when the reference point is the color coordinates (a*=0, b*=0), the color shift is defined by √
((a*article)2+(b*article)2),wherein, when the reference point is the color coordinates (a*=−
2, b*=−
2), the color shift is defined by √
((a*article+2)2+(b*article+2)2), andwherein, when the reference point is the color coordinates of the substrate, the color shift is defined by √
((a*article−
a*substrate)2+(b*article−
b*substrate)2).
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Accused Products
Abstract
Embodiments of durable, anti-reflective articles are described. In one or more embodiments, the article includes a substrate and an optical coating disposed on the major surface. The optical coating includes an anti-reflective coating and a scratch-resistant coating forming an anti-reflective surface. The article exhibits a maximum hardness of 12 GPa or greater, as measured on the anti-reflective surface by a Berkovich Indenter Hardness Test along an indentation depth of about 100 nm or greater. The articles of some embodiments exhibit a single side average light reflectance measured at the anti-reflective surface of about 8% or less over an optical wavelength regime in the range from about 400 nm to about 800 nm and a reference point color shift in transmittance or reflectance of less than about 2. In some embodiments, the article exhibits an angular color shift of about 5 or less at all angles from normal incidence to an incident illumination angle that is 20 degrees or greater.
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Citations
31 Claims
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1. A device comprising:
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a display comprising a user interface; a cover article disposed over the display, the cover article comprising a substrate having a major surface; and
an optical coating disposed on the major surface and forming an anti-reflective surface, the optical coating comprising an anti-reflective coating,wherein the cover article exhibits a maximum hardness of about 10 GPa to about 30 GPa along an indentation depth of 600 nm from the anti-reflective surface; and wherein the cover article exhibits a single side average light transmittance measured at the anti-reflective surface of about 92% or more over an optical wavelength regime in the range from about 400 nm to about 800 nm and either one or both of; article transmittance color coordinates in the (L*, a*, b*) colorimetry system at normal incidence under an International Commission on Illumination illuminant exhibiting a reference point color shift of less than about 2 from a reference point as measured at the anti-reflective surface, the reference point comprising at least one of the color coordinates (a*=0, b*=0) and the transmittance color coordinates of the substrate, and article reflectance color coordinates in the (L*, a*, b*) colorimetry system at normal incidence under an International Commission on Illumination illuminant exhibiting a reference point color shift of less than about 5 from a reference point as measured at the anti-reflective surface, the reference point comprising at least one of the color coordinates (a*=0, b*=0), the color coordinates (a*=−
2, b*=−
2), and the reflectance color coordinates of the substrate,wherein, when the reference point is the color coordinates (a*=0, b*=0), the color shift is defined by √
((a*article)2+(b*article)2),wherein, when the reference point is the color coordinates (a*=−
2, b*=−
2), the color shift is defined by √
((a*article+2)2+(b*article+2)2), andwherein, when the reference point is the color coordinates of the substrate, the color shift is defined by √
((a*article−
a*substrate)2+(b*article−
b*substrate)2). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An article comprising:
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a substrate having a major surface; and an optical coating disposed on the major surface forming an anti-reflective surface, wherein the optical coating comprises at least one anti-reflective coating and a scratch resistant layer, wherein the article exhibits a maximum hardness of from about 10 GPa to about 30 GPa along an indentation depth of 600 nm from the anti-reflective surface, wherein the article exhibits, under a D65 or F2 illuminant at normal incidence, an average single-side light transmittance of 92% or more over the optical wavelength regime, as measured on the anti-reflective surface, article transmittance color coordinates in the (L*, a*, b*) colorimetry system exhibiting a reference point color shift of less than about 2 from a reference point as measured at the anti-reflective surface, the reference point comprising at least one of the color coordinates (a*=0, b*=0) and the transmittance color coordinates of the substrate, and article reflectance color coordinates in the (L*, a*, b*) colorimetry system exhibiting a reference point color shift of less than about 5 from a reference point as measured at the anti-reflective surface, the reference point comprising at least one of the color coordinates (a*=0, b*=0), the color coordinates (a*=−
2, b*=−
2), and the reflectance color coordinates of the substrate,wherein, when the reference point is the color coordinates (a*=0, b*=0), the color shift is defined by √
((a*article)2+(b*article)2),wherein, when the reference point is the color coordinates (a*=−
2, b*=−
2), the color shift is defined by ε
((a*article+2)2+(b*article+2)2), andwherein, when the reference point is the color coordinates of the substrate, the color shift is defined by √
((a*article−
a*substrate)2+(b*article−
b*substrate)2). - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification