Abstract: Foldable substrates comprise a substrate thickness from about 80 micrometers to about 2 millimeters. Foldable substrates comprise a first portion, a second portion, and a central portion positioned therebetween. The central portion comprises a central thickness from about 25 micrometers to about 80 micrometers defined between a first central surface area and a second central surface area. A central total thickness variation of the central portion over the first central surface area is less than or equal to 10 micrometers. The central portion comprises a first transition region extending between a first surface area of the first portion and the first central surface area. The first central surface area is recessed from the first major surface by a first distance. A thickness of the first transition region smoothly and monotonically decreases between the substrate thickness of the first portion and the central thickness of the central portion.

Abstract: Disclosed is display device for a vehicle interior system including a glass substrate comprising a length extending in a first direction that is greater than or equal to 200 mm. An organic light emitting diode (OLED) display module is disposed on a major surface of the glass substrate, the OLED display module comprising a plurality of functional layers. A support structure is mechanically coupled to the glass substrate and the OLED display module to retain the glass substrate and the OLED display module in a curved configuration. A plurality of adhesive layers attach the OLED display module to the second major surface and a plurality of functional layers of the OLED display module to one another. Each adhesive layer comprises a Young's modulus that is less than or equal 1.5 MPa to decouple strain distributions in the glass substrate and the plurality of functional layers from one another.

Abstract: A transparent article is described herein that includes: a glass-ceramic substrate comprising first and second primary surfaces opposing one another and a crystallinity of at least 40% by weight; and an optical film structure disposed on the first primary surface. The optical film structure comprises a plurality of alternating high refractive index (RI) and low RI layers and a scratch-resistant layer. The article also exhibits an average photopic transmittance of greater than 80% and a maximum hardness of greater than 10 GPa, as measured by a Berkovich Hardness Test over an indentation depth range from about 100 nm to about 500 nm. The glass-ceramic substrate comprises an elastic modulus of greater than 85 GPa and a fracture toughness of greater than 0.8 MPa·?m. Further, the optical film structure exhibits a residual compressive stress of ?700 MPa and an elastic modulus of ?140 GPa.

Abstract: Foldable apparatus comprise a plurality of first portions and at least one second portion positioned between a corresponding adjacent pair of first portions of the plurality of first portions. Each second portion of the at least one second portion comprises a maximum Young’s modulus ranging from about 500 times to about 500,000 times less than a minimum Young’s modulus of the corresponding adjacent pair of first portions. In some embodiments, the at least one second portion comprises at least five second portions. In some embodiments, each second portion of the at least one second portion comprises a thickness ranging from about 10 micrometers to about 250 micrometers. In some embodiments, each first portion comprises a first neutral plane and each second portion comprises a second neutral plane. In some embodiments, an apparatus bend force ranges from about 0.5 times to about 1 times a total bend force.

Abstract: A transparent article is described herein that includes: a substrate comprising an opposing first and second primary surface; and an optical film structure disposed on the first primary surface. The optical film structure comprises a scratch-resistant layer, a plurality of alternating high refractive index (RI) and low RI layers, and an outer and inner structure, the scratch-resistant layer disposed between the outer and inner structures. The outer structure can comprise at least one medium RI layer in contact with one of the high RI layers and the scratch-resistant layer. The medium RI layer comprises an RI from 1.55 to 1.80, each of the high RI layers comprises an RI of >1.80, and each of the low RI layers comprises an RI<1.55. A sum of the physical thicknesses of all of the low RI layers in the outer structure can be <200 nm.

Abstract: Foldable substrates comprise a first outer layer comprising a first major surface, a second outer layer comprising a second major surface, and a core layer positioned therebetween. The core layer may comprise a first central surface area positioned between a first portion and a second portion of the first outer layer, and the core layer comprising a second central surface area positioned between a third portion and fourth portion of the second outer layer. Some foldable substrates comprise a first portion comprising a first depth of compression, a first depth of layer, and a first average concentration. The central portion may comprise a first central depth of compression, a first central depth of layer, and a central average concentration. Methods comprise chemically strengthening a foldable substrate. Some methods comprise etching the foldable substrate and then further chemically strengthening the foldable substrate.

Abstract: A cover article for a sensor is described herein that includes: a substrate comprising a thickness from 50 ?m to 5000 ?m, an outer primary surface, and an inner primary surface; and an outer layered film disposed on the outer primary surface. The substrate is a chemically-strengthened glass or glass-ceramic substrate. The cover article exhibits a first-surface average reflectance of less than 10% for wavelengths from 1000 nm to 1700 nm for at least one angle of incidence from 8° to 60°.

Abstract: Articles are described that may include substrates having a major surface, the major surface comprising a first portion and a second portion. A first direction that is normal to the first portion of the major surface may not be equal to a second direction that is normal to the second portion of the major surface. The angle between the first direction and the second direction may be at least 15 degrees. An optical coating may be disposed on at least the first portion and the second portion of the major surface. The optical coating may form an antireflective surface.

Abstract: A transparent article is described herein that includes: a glass-ceramic substrate comprising first and second primary surfaces opposing one another and a crystallinity of at least 40% by weight; and an optical film structure disposed on the first primary surface. The optical film structure comprises a plurality of alternating high refractive index (RI) and low RI layers and a scratch-resistant layer. The article also exhibits an average photopic transmittance of greater than 80% and a maximum hardness of greater than 10 GPa, as measured by a Berkovich Hardness Test over an indentation depth range from about 100 nm to about 500 nm. The glass-ceramic substrate comprises an elastic modulus of greater than 85 GPa and a fracture toughness of greater than 0.8 MPa·?m. Further, the optical film structure exhibits a residual compressive stress of ? 700 MPa and an elastic modulus of ?140 GPa.

Abstract: A transparent article is described herein that includes: a glass-ceramic substrate comprising first and second primary surfaces opposing one another and a crystallinity of at least 40% by weight; and an optical film structure disposed on the first primary surface. The optical film structure comprises a plurality of alternating high refractive index (RI) and low RI layers and a scratch-resistant layer. The article also exhibits an average photopic transmittance of greater than 80% and a maximum hardness of greater than 10 GPa, as measured by a Berkovich Hardness Test over an indentation depth range from about 100 nm to about 500 nm. The glass-ceramic substrate comprises an elastic modulus of greater than 85 GPa and a fracture toughness of greater than 0.8 MPa·?m. Further, the optical film structure exhibits a residual compressive stress of ?700 MPa and an elastic modulus of ?140 GPa.

Abstract: Foldable apparatus comprise a foldable substrate foldable about an axis and a substrate thickness defined between a first major surface and a second major surface. The foldable substrate comprises a central portion positioned between a first portion and a second portion. The first portion comprising a substrate thickness. The central portion comprises a central thickness that is less than the substrate thickness. In some embodiments, a width of central portion is about 45 millimeters or less. Methods of making a foldable apparatus comprise forming a recess in a first major surface of the foldable substrate. In some embodiments, methods comprise chemically strengthening the foldable substrate.

Abstract: Foldable apparatus can comprise a first portion comprising a first edge surface defined between a first surface area and a second surface area opposite the first surface area. Foldable apparatus can comprise a second portion comprising a second edge surface defined between a third surface area and a fourth surface area opposite the third surface area. A polymer-based portion can be positioned between the first blunted edge surface and the second blunted edge surface. In some embodiments, the polymer-based portion can comprise a polymer thickness of about 50 micrometers or less measured from the second surface area and/or the first surface area. In some embodiments, the first edge surface and/or the second edge surface can comprise a blunted edge surface. In some embodiments, a coating can be disposed over the first portion, the second portion and the polymer-based portion.