Re-shaped glass-based articles and methods of making the same

Abstract

Re-shaped curved glass-based articles and methods for producing the same are disclosed. The re-shaped glass-based articles can be produced by re-shaping an oversized pre-formed glass substrate and cutting the oversized pre-form to produce a glass-based article comprising a re-shaped glass substrate comprising a curved shape having a maximum compressive strain (MCS) shape parameter greater than or equal to 0.1% and a maximum curvature less than 0.5 m ‑1 . The maximum curvature is measured at any point along a straight line perpendicular to a peripheral edge of the glass substrate and between a first point located at the peripheral edge and a second point located on the curved shape at a distance of 50 mm to 100 mm from the first point.

Description

Cross-references to related applications

[0001] This application claims priority to U.S. Application Serial No. 63 / 599,233, filed November 15, 2023, the contents of which are used as the basis and are incorporated herein by reference in their entirety. Technical Field

[0002] This disclosure relates to the reshaping of glass substrates for use in various industries, such as consumer electronics, appliances, transportation, architectural design, defense, and medicine. Specifically, this disclosure relates to cutting oversized reshaped glass substrates to produce reshaped glass substrates, such as automotive windshields. Background Technology

[0003] Many products increasingly incorporate three-dimensional (3D) glass substrates. Some examples of products incorporating 3D glass substrates include curved LCD or LED TV screens, smartphones, windows, and windshields. This innovation in product shape presents new challenges to the manufacturing processes of 3D parts, especially those made of glass, which should possess excellent optical properties.

[0004] Therefore, methods for manufacturing 3D products with complex shapes and minimal optical distortion, especially 3D glass-based products, have always been in demand. Summary of the Invention

[0005] One embodiment of this disclosure relates to a reshaped glass substrate comprising: a reshaped glass substrate having a curved shape defined by a first curved surface and a second curved surface, wherein: the maximum compressive strain (MCS) shape parameter of the curved shape is greater than or equal to 0.1%; and the maximum curvature of the curved shape at any point between the first and second points is less than 0.5 m. -1 Wherein: the first point is located at the outer edge of the reshaped glass substrate; the second point is located at a distance of 50 mm to 100 mm from the first point on the curved surface; and the first line drawn from the first point to the second point is perpendicular to the outer edge where the first point is located.

[0006] Another embodiment of this disclosure relates to a method for producing a reshaped glass-based article, the method comprising: cutting a glass substrate to produce an oversized preformed glass substrate; forming the oversized preformed glass substrate to produce an oversized preformed glass substrate containing a curved oversized region formed within a cavity of a reforming apparatus; and cutting the curved oversized region to produce the reshaped glass-based article, wherein the reshaped glass-based article comprises: a reshaped glass substrate, the reshaped glass substrate comprising a first curved shape defined by a first curved surface and a second curved surface, wherein: the maximum compressive strain (MCS) shape parameter of the first curved shape is greater than or equal to 0.1%; and the maximum curvature of the first curved shape is less than 0.5 m when measured at any point between the first point and the second point. -1 Wherein: the first point is located at the outer edge of the reshaped glass substrate; the second point is located at a distance of 50 mm to 100 mm from the first point on the curved surface; and the first line drawn from the first point to the second point is perpendicular to the outer edge where the first point is located. Attached Figure Description

[0007] The accompanying drawings, incorporated herein by reference and forming part of this specification, illustrate embodiments of the present disclosure. Together with the description, the drawings further serve to explain the principles of the disclosed embodiments and to enable those skilled in the art to make and use the disclosed embodiments. These drawings are intended to be illustrative and not restrictive. While the present disclosure is generally described in the context of these embodiments, it should be understood that it is not intended to limit the scope of the disclosure to these particular embodiments. In the drawings, the same reference numerals denote the same or functionally similar elements.

[0008] Figure 1 A flowchart of a method according to an embodiment is shown.

[0009] Figure 2 A glass substrate according to an embodiment is shown.

[0010] Figure 3 A remolding apparatus and an extra-large preformed glass substrate are shown according to an embodiment.

[0011] Figure 4 The reshaped glass substrate and excess glass according to an embodiment are shown.

[0012] Figure 5 The following is shown according to the embodiment. Figure 3 The image shows a cross-sectional view of a portion of an oversized preformed glass substrate on a remolding device, taken from line 5-5'.

[0013] Figure 6 A reshaped glass substrate according to an embodiment is shown.

[0014] Figure 7 A reshaped glass substrate article comprising two reshaped glass substrates joined at their peripheral edges is shown according to an embodiment.

[0015] Figure 8 A laminated glass-based article according to an embodiment is shown. Detailed Implementation

[0016] The following embodiments are illustrative and not limiting of this disclosure. Other suitable modifications and adaptations to various conditions and parameters commonly encountered in the art and obvious to those skilled in the art are within the spirit and scope of this disclosure.

[0017] As used herein, the term "glass-based" is intended to include any material made at least in part of glass, including glass and glass-ceramics. "Glass-ceramics" includes materials produced through the controlled crystallization of glass. One or more nucleating agents, such as titanium oxide (TiO2), zirconium oxide (ZrO2), sodium oxide (Na2O), and phosphorus oxide (P2O5), may be added to glass-ceramic compositions to promote uniform crystallization. In the embodiments, the glass-based articles or plates may exhibit an amorphous microstructure and may be substantially free of crystals or microcrystals. In other words, the glass-based articles or plates in these embodiments do not include glass-ceramic materials. In other embodiments, the glass-based articles or plates may be glass-ceramic articles or plates.

[0018] As used herein, the terms "non-developable curvature" or "non-zero Gaussian curvature" refer to a curvature with intersecting radii that cannot be formed by bending of paperboard without stretching, tearing, or creasing the paper. Exemplary non-developable curvatures include, but are not limited to, spherical curvature, spherical curvature, partially spherical curvature, and three-dimensional saddle curvature. "Developable curvature" or "zero Gaussian curvature" refers to a curvature that can be formed of paperboard simply by bending. Exemplary developable curvatures include, but are not limited to, cylindrical and conical curvatures.

[0019] As used herein, “disposed on” means that the first component is in direct contact with the second component. In other words, if the first component is disposed on the second component, then no component is disposed between the first and second components. If the first component is described as being “disposed on” the second component, then there may or may not be any other component between the first and second components. The description of the first component as being “disposed on” or “disposed on” the second component does not imply that the first and second components are assembled in any particular order. Unless otherwise stated, the first and second components may be assembled in any order.

[0020] As used herein, two components described as “bonded” to each other (e.g., two glass substrates) means that the first component and the second component are bonded to each other directly or indirectly via an adhesive or adhesive layer. As used herein, two components described as “directly bonded” to each other (e.g., two glass substrates) means that the first component and the second component are directly bonded to each other via an adhesive or adhesive layer, without any other intermediate layer between the two components.

[0021] Three-dimensional (3D) reshaped glass substrates (such as automotive windshields, sidelights, and roofs) can be produced by molding two-dimensional (2D) glass substrates using various molding methods, such as drooping, pressing, and roll bending, depending on the design complexity and target application. Because the shape changes from 2D to 3D when molding the glass substrate into a reshaped glass substrate, and because the molding method introduces variability, the resulting reshaped glass substrates may exhibit edge effects, such as reflection distortion or size variations. Therefore, undesirable optical defects may be visible to the naked eye at the edges of the reshaped glass substrates. In some cases, these optical defects preclude the integration of multiple reshaped glass substrates to create a “seamless” structure, where no optical distortion occurs at the interfaces of the reshaped glass substrates.

[0022] The method according to the described embodiments reduces or eliminates optical distortion problems at the edges of the reshaped glass substrate by first forming an oversized preformed glass substrate and then extracting the reshaped glass substrate from the oversized preformed glass substrate by cutting it. In embodiments, cutting may include laser cutting. The forming and cutting steps according to the embodiments are designed to remove regions of high curvature from the oversized preformed glass substrate that may cause undesirable optical distortion, thereby resulting in the reshaped glass substrate having little or no optical distortion at its edges.

[0023] Figure 1 The steps of a method for producing a reshaped glass-based article according to an embodiment are shown. Unless otherwise stated, the steps of the method do not need to be performed in the order set forth herein. Furthermore, unless otherwise stated, the steps do not need to be performed in a specific order. The steps may be performed in different orders or simultaneously.

[0024] In step 100, an oversized pre-formed glass substrate 202 can be cut from the glass substrate 200 by cutting along the defined perimeter 201, such as... Figure 2 As shown in the figure. The glass substrate 200 may comprise at least partially any material made of glass, including glass and glass ceramics.

[0025] In step 101, the extra-large pre-formed glass substrate 202 can be formed into a curved shape using the re-forming equipment 300, such as... Figure 3 As shown in the illustration. Reshaping apparatus 300 can be any apparatus that can be used to reshape a glass substrate (e.g., pre-formed glass substrate 202) to produce a glass substrate having a curved shape. In embodiments, reshaping apparatus 300 can bend the glass substrate, such as pre-formed glass substrate 202, by drooping. In embodiments, drooping can be gravity drooping. In embodiments, reshaping apparatus 300 can be a vacuum forming apparatus that bends the glass substrate, such as pre-formed glass substrate 202, by applying vacuum pressure. In embodiments, reshaping apparatus 300 can be an apparatus disclosed in WO 2022 / 231933 or WO 2021 / 086566, each of which is incorporated herein by reference. In any case, reshaping apparatus 300 can include a periphery 310 surrounding a cavity 301 into which the glass substrate 202 is reshaped.

[0026] In step 102, as Figure 3 As shown, an oversized preformed glass substrate 202 can be cut along a defined perimeter 302 to produce a reshaped glass article 407 comprising one or more reshaped glass substrates 303. Figure 4 As shown, excess glass 304 surrounding the perimeter 302 can be removed from the glass substrate. In an embodiment, step 102 may include laser cutting along the defined perimeter. In an embodiment, laser cutting may be performed as described in WO 2019 / 125969 A1 or U.S. Patent No. 9,815,370, both of which are hereby incorporated by reference.

[0027] In this embodiment, the periphery 302 is selected such that, after cutting, when measured at any point between a first point (e.g., point 401) located anywhere on the peripheral edge 400 of the reshaped glass substrate 303 and a second point (e.g., point 402) located anywhere on the curved surface 404 of the reshaped glass substrate 303, the maximum curvature of the resulting reshaped glass substrate 303 is less than 0.5 m. -1In such embodiments, the maximum curvature is measured along a line (e.g., line 403) drawn from the first point 401 to the second point 402 and perpendicular to the peripheral edge 400. The peripheral edge 400 refers to all edges of the reshaped glass substrate 303, for example, all four edges of a reshaped glass substrate 303 having a quadrilateral shape. In embodiments, the glass substrate 303 may have multiple distinct edges separated by sharp or rounded corners. In embodiments, the glass substrate 303 may have continuous peripheral edges, for example, for a circular or elliptical glass substrate.

[0028] In an embodiment, a device using phase-shift deflection (PSD) can be used to measure curvature. Such a device can be operated by displaying a dynamic sinusoidal pattern on a screen. The reflected pattern is deformed by the curved surface being analyzed (e.g., the curved surface 404 of the reshaped glass substrate 303). This information is digitized by a camera, and an algorithm is used to determine the deformation that produces the deformed pattern.

[0029] Figure 5 It shows along Figure 3 The image shows a cross-sectional view of an oversized preformed glass substrate 202 on the periphery 310 of the reforming apparatus 300, taken by line 5-5'. The oversized preformed glass substrate 202 has an oversized dimension 500, defined as the distance from the peripheral edge 501 of the oversized preformed glass substrate 202 to the periphery 302, at which the oversized preformed glass substrate will be cut to produce a reformed glass substrate 303. The oversized preformed glass substrate 202 also has a second oversized dimension 502, defined as the distance from the periphery 310 of the reforming apparatus 300 to the periphery 302, at which the oversized preformed glass substrate will be cut to produce a reformed glass substrate 303. In embodiments, the oversized dimension 500 and / or the second oversized dimension 502 can be selected based on the size of the glass substrate 200 and / or the oversized preformed glass substrate 202 and / or the maximum compressive strain (MCS) shape parameter. In embodiments, the oversized dimension 500 and / or the second oversized dimension 502 can vary depending on the desired application of the final reshaped glass substrate article 407. In embodiments, the oversized dimension 500 can range from greater than or equal to 20 mm to less than or equal to 40 mm. In embodiments, the oversized dimension 502 can range from greater than or equal to 5 mm to less than or equal to 15 mm.

[0030] In this embodiment, when measured at any point between the first point 401 and the second point 402 along line 403, the maximum curvature of the reshaped glass substrate 303 can be less than 0.05 m. -1or less than 0.025 m -1 .

[0031] In an embodiment, the distance between the first point 401 and the second point 402 (e.g., the length of line 403) can range from 50 mm to 100 mm. In an embodiment, the distance between the first point 401 and the second point 402 (e.g., the length of line 403) can range from 50 mm to 60 mm, 50 mm to 70 mm, 50 mm to 80 mm, 50 mm to 90 mm, 50 mm to 120 mm, 50 mm to 140 mm, 50 mm to 160 mm, 50 mm to 180 mm, 50 mm to 200 mm, 60 mm to 70 mm, 60 mm to 80 mm, 60 mm to 90 mm, 60 mm to 100 mm, 60 mm to 120 mm, 60 mm to 140 mm, 60 mm to 160 mm, 60 mm to 180 mm, 60 mm to 200 mm, 70 mm to 80 mm, 70 mm to 90 mm, 70 mm to 100 mm, 70 mm to 120 mm, 70 mm to 140 mm, 70 mm to 160 mm, 70 mm to 18 ... mm to 200 mm, 80 mm to 90 mm, 80 mm to 100 mm, 80 mm to 120 mm, 80 mm to 140 mm, 80 mm to 160 mm, 80 mm to 180 mm, 80 mm to 200 mm, 90 mm to 100 mm, 90 mm to 120 mm, 90 mm to 140 mm, 90 mm to 160 mm, 90 mm to 180 mm, 90 mm to 200 mm, 100 mm to 120 mm, 100 mm to 140 mm, 100 mm to 160 mm, 100 mm to 180 mm, 100 mm to 200 mm, 120 mm to 140 mm, 120 mm to 160 mm, 120 mm to 180 mm, 120 mm to 200 mm, 140 mm to 160 mm, 140 mm to 180 mm, 140 mm to 200 mm, 160 mm 160 mm to 200 mm or 180 mm to 200 mm. The aforementioned ranges can be used for relatively large glass products (e.g., windshields, side windows or roofs for vehicle applications).

[0032] In an embodiment, for smaller glass articles, such cover glass for displays or mobile consumer electronics devices, the distance between the first point 401 and the second point 402 (e.g., the length of line 403) can range from 5 mm to 50 mm. In an embodiment, the distance between the first point 401 and the second point 402 (e.g., the length of line 403) can range from 5 mm to 10 mm, 5 mm to 15 mm, 5 mm to 20 mm, 5 mm to 25 mm, 5 mm to 30 mm, 5 mm to 35 mm, 5 mm to 40 mm, 5 mm to 45 mm, 10 mm to 15 mm, 10 mm to 20 mm, 10 mm to 25 mm, 10 mm to 30 mm, 10 mm to 35 mm, 10 mm to 40 mm, 10 mm to 45 mm, 10 mm to 50 mm, 15 mm to 20 mm, 15 mm to 25 mm, 15 mm to 30 mm, 15 mm to 35 mm, 15 mm to 40 mm, 15 mm to 45 mm, 15 mm to 50 mm, 20 mm to 25 mm, 20 mm to 30 mm, 20 mm to 35 mm, 20 mm to 40 mm, 20 mm to 45 mm, 20 mm to 45 mm, 20 mm to 45 mm, 20 mm to 45 mm, 20 mm to 45 mm, 20 mm to 45 mm, 20 mm to 45 mm, 20 mm to 45 mm, 20 mm to 45 mm, 20 mm to 40 ...0 mm, 20 mm to 40 mm, 20 mm to 40 mm mm to 50 mm, 25 mm to 30 mm, 25 mm to 35 mm, 25 mm to 40 mm, 25 mm to 45 mm, 25 mm to 50 mm, 30 mm to 35 mm, 30 mm to 40 mm, 30 mm to 45 mm, 30 mm to 50 mm, 35 mm to 40 mm, 35 mm to 45 mm, 35 mm to 50 mm, 40 mm to 45 mm, 40 mm to 50 mm or 45 mm to 50 mm.

[0033] In an embodiment, the maximum curvature of the reshaped glass substrate 303 can be 0.025 m when measured along line 403 at any point between the first point 401 and the second point 402. -1 To less than 0.05 m -1 0.025 m -1 up to 0.075 m -1 0.025 m -1 up to 0.1 m -1 0.025 m -1 up to 0.25 m -1 0.025 m -1 To less than 0.5 m -1 0.05 m -1 up to 0.075 m -1 0.05 m-1 up to 0.1 m -1 0.05 m -1 up to 0.25 m -1 0.05 m -1 To less than 0.5 m -1 0.075 m -1 up to 0.1 m -1 0.075 m -1 up to 0.25 m -1 0.075 m -1 To less than 0.5 m -1 0.1 m -1 up to 0.25 m -1 0.1 m -1 To less than 0.5 m -1 or 0.25 m -1 To less than 0.5 m -1 .

[0034] In an embodiment, the maximum curvature can be measured at multiple points around the peripheral edge 400 of the reshaped glass substrate 303. In an embodiment, the first point 401, the second point 402, and the line 403 can be selected anywhere on the peripheral edge 400 of the reshaped glass substrate 303 (e.g., on the first edge, second edge, third edge, and / or fourth edge). In an embodiment, the maximum curvature can be measured at any number of different points (e.g., one point, two points, three points, four points, or five points). In an embodiment, the maximum curvature can be measured by selecting a first point 401 on a first point on the first edge of the peripheral edge 400, a second point on a second point on the second edge of the peripheral edge 400, a third point on a third edge of the peripheral edge 400, and a fourth point on a fourth edge of the peripheral edge 400, and drawing each second point 402 and line 403 based on the location of each first point 401. In an embodiment, the maximum curvature measured at any and all of the multiple points of the glass substrate 303 can be less than 0.05 m. -1 Less than 0.025 m -1 Or within any of the above ranges. In an embodiment, the maximum curvature measured at all points along the entire peripheral edge 400 of the glass substrate 303 can be less than 0.05 m. -1 Less than 0.025 m -1 Or within any of the above ranges.

[0035] In an embodiment, the perimeter 302 can be selected such that, after cutting, when measured at any point between the inner edge 405 of the excess glass 304 cut at the perimeter 302 and the outer edge 406 surrounding the inner edge 405, the maximum curvature of the resulting excess glass 304 is greater than or equal to 0.5 m. -1 Therefore, the methods and processes described herein may help to provide articles with relatively low curvature near their edges, even when the articles are cut from preforms with relatively large curvature. This aspect allows the surfaces of the articles to have a wide variety of shapes while still exhibiting an optically smooth periphery. This smooth periphery facilitates the combination of glass articles formed via the methods described herein with other glass articles to form optically smooth interfaces, as described in more detail herein.

[0036] In this embodiment, the maximum curvature of the excess glass 304 can be greater than or equal to 0.6 m when measured at any point between the outer edge 405 and the inner edge 406. -1 ≥0.7 m -1 ≥0.8 m -1 ≥0.9 m -1 , greater than or equal to 1 m -1 ≥1.25 m -1 ≥1.5 m -1 ≥1.75 m -1 ≥2 m -1 ≥2.5 m -1 ≥3 m -1 ≥3.5 m -1 4 m or greater -1 ≥4.5 m -1 or greater than or equal to 5 m -1 .

[0037] In this embodiment, the maximum curvature of the excess glass 304 is 0.5 m when measured at any point between the outer edge 405 and the inner edge 406. -1 up to 0.75 m -1 0.5 m -1 Up to 1 m -1 0.5 m -1 Up to 1.5 m -1 0.5 m -1 Up to 2 m -1 0.5 m -1 Up to 2.5 m -1 0.5 m -1 up to 3 m -10.5 m -1 Up to 3.5 m -1 0.5 m -1 Up to 4 m -1 0.5 m -1 Up to 4.5 m -1 0.5m -1 up to 5 m -1 0.75 m -1 Up to 1 m -1 0.75 m -1 Up to 1.5 m -1 0.75 m -1 Up to 2 m -1 0.75 m -1 Up to 2.5 m -1 0.75m -1 up to 3 m -1 0.75 m -1 Up to 3.5 m -1 0.75 m -1 Up to 4 m -1 0.75 m -1 Up to 4.5 m -1 0.75 m -1 up to 5 m -1 1 m -1 Up to 1.5 m -1 1 m -1 Up to 2 m -1 1 m -1 Up to 2.5 m -1 1 m -1 up to 3 m -1 1 m -1 Up to 3.5 m -1 1 m -1 Up to 4 m -1 1 m -1 Up to 4.5 m -1 1 m -1 up to 5 m -1 1.5 m -1 Up to 1.5 m -1 1.5 m -1 Up to 2 m -1 1.5 m -1 Up to 2.5 m -1 1.5 m -1 up to 3m -1 1.5 m -1 Up to 3.5 m -1 1.5 m -1 Up to 4 m -1 1.5 m-1 Up to 4.5 m -1 1.5 m -1 up to 5 m -1 2 m -1 Up to 2.5 m -1 2m -1 up to 3 m -1 2 m -1 Up to 3.5 m -1 2 m -1 Up to 4 m -1 2 m -1 Up to 4.5 m -1 2 m -1 up to 5 m -1 2.5 m -1 up to 3 m -1 2.5m -1 Up to 3.5 m -1 2.5 m -1 Up to 4 m -1 2.5 m -1 Up to 4.5 m -1 2.5 m -1 up to 5 m -1 3 m -1 Up to 3.5 m -1 3 m -1 up to 4m -1 3 m -1 Up to 4.5 m -1 3 m -1 up to 5 m -1 3.5 m -1 Up to 4 m -1 3.5 m -1 Up to 4.5 m -1 3.5 m -1 up to 5 m -1 4 m -1 Up to 4.5 m -1 4 m -1 up to 5 m -1 or 4.5 m -1 up to 5 m -1 .

[0038] In step 103, edge grinding technology can be used to grind the peripheral edge 400 of the reshaped glass substrate 303. In some embodiments, a CNC (computer numerical control) grinding robot can be used to grind the peripheral edge 400.

[0039] In step 104, edge strengthening techniques can be used to strengthen the peripheral edge 400 of the reshaped glass substrate 303. For example, the peripheral edge 400 can be chemically strengthened or thermally strengthened. In an embodiment, an ion exchange process can be used to chemically strengthen the peripheral edge 400.

[0040] In step 105, multiple reshaped glass substrates 303 according to an embodiment may be laminated to form a reshaped glass substrate article 407 comprising multiple layers. In such embodiments, the reshaped glass substrate article 407 may comprise a first reshaped glass substrate 303a and a second reshaped glass substrate 303b laminated together by an adhesive 802, such as Figure 8 As shown in the illustration. In an embodiment, the reformulated glass substrate 407 may comprise more than two glass substrates laminated together.

[0041] After being reshaped according to the embodiments described herein, the reshaped glass substrate 303 can have a desired shape. Figure 6 A cross-sectional view of a reshaped glass substrate 303 according to an embodiment is shown. The reshaped glass substrate 303 includes a non-developable surface shape defined by a first curved surface 601 and a second curved surface 602. In an embodiment, the first curved surface 601 may be... Figure 4 The curved surface 404 shown in the example. In an embodiment, the second curved surface 602 may be... Figure 4 The curved surface 404 shown in the figure.

[0042] Figure 6 A reshaped glass substrate 303 and a hypothetical surface 600 are shown according to an example embodiment. In the embodiment, the hypothetical surface 600 represents a hypothetical plane into which points contained in a hypothetical central surface 607 defined by the reshaped glass substrate 303 can be displaced during simulation, as indicated by arrow 605, to determine the complexity of the curved shape of the reshaped glass substrate 303.

[0043] As shown in the figure, the reshaped glass substrate 303 includes a first curved surface 601, a second curved surface 602, and a thickness 603 extending between the first curved surface 601 and the second curved surface 602. In an embodiment, the first curved surface 601 and the second curved surface 602 define a non-developable surface shape of the reshaped glass substrate 303. In an embodiment, the thickness 603 represents the distance between the first curved surface 601 and the second curved surface 602 along a direction 604 perpendicular to the first curved surface 601. As will be understood, given a non-developable surface shape, the direction 604 for measuring the thickness 603 can vary as a function of a position on the first curved surface 601. In an embodiment, the thickness 603 may correspond to the minimum distance from the first curved surface 601 to the second curved surface 602 measured from a specific point on the first curved surface 601.

[0044] In embodiments, the thickness 603 can range from 0.25 mm to 4 mm, 0.5 mm to 4 mm, 0.7 mm to 4 mm, 1 mm to 4 mm, 2 mm to 4 mm, or within a range with any two of these values ​​as endpoints. In embodiments, the thickness 603 can range from 0.1 mm to 10 mm, 0.2 mm to 10 mm, 0.3 mm to 10 mm, 0.4 mm to 10 mm, 0.5 mm to 10 mm, 0.6 mm to 10 mm, 0.7 mm to 10 mm, 0.8 mm to 10 mm, 0.9 mm to 10 mm, 1 mm to 10 mm, 1.1 mm to 10 mm, 1.2 mm to 10 mm, 1.4 mm to 10 mm, 1.5 mm to 10 mm, 1.6 mm to 10 mm, 1.8 mm to 10 mm, 2 mm to 10 mm, 2.1 mm to 10 mm, 2.1 mm to 10 mm, 0.25 mm to 4 mm, 0.5 mm to 4 mm, 0.7 mm to 4 mm, 1 mm to 4 mm, 1 mm to 4 mm, 2 mm to 4 mm, or within a range with any two of these values ​​as endpoints. Meters to 10 mm, 2.5 mm to 10 mm, 3 mm to 10 mm, 4 mm to 10 mm, 5 mm to 10 mm, 0.1 mm to 9 mm, 0.1 mm to 8 mm, 0.1 mm to 7 mm, 0.1 mm to 6.5 mm, 0.1 mm to 6 mm, 0.1 mm to 5 mm, 0.1 mm to 4 mm, 0.5 mm to 4 mm, 0.7 mm to 4 mm, 0.7 mm to 3.5 mm, 0.7 mm to 3 mm, 0.7 mm to 2.5 mm, or 0.7 mm to 2 mm, or within a range with any two of these values ​​as endpoints.

[0045] The value obtained when measuring thickness 603 can vary depending on the position on the first curved surface 601.

[0046] In an embodiment, the surface area of ​​the first curved surface 601 and / or the second curved surface 602 may be 10,000 mm². 2 Or larger, 20,000 mm 2 Or larger, 30,000 mm2 Or larger, or 60,000 mm 2 Or larger. In embodiments, the surface area of ​​the first curved surface 601 and / or the second curved surface 602 can range from 10,000 mm. 2 Up to 6 mm 2 20,000mm 2 Up to 6 mm 2 30,000 mm 2 Up to 6 mm 2 Or 60,000 mm 2 Up to 6 mm 2 .

[0047] In one embodiment, the thickness uniformity of the curved shape of the reshaped glass substrate 303 defined by the first curved surface 601 and the second curved surface 602 can be x micrometers (µm) per 100 mm + / -. A thickness uniformity of x micrometers per 100 mm means that the maximum thickness variation of the reshaped glass substrate 303 along a 100 mm measured length of curved surface portion does not exceed x micrometers. In another embodiment, the thickness uniformity of the curved shape of the reshaped glass substrate 303 defined by the convex and concave surfaces can be 50 micrometers per 100 mm. In yet another embodiment, the thickness uniformity of the curved shape of the reshaped glass substrate 303 defined by the convex and concave surfaces can be 25 micrometers per 100 mm. Finally, the thickness uniformity of the curved shape of the reshaped glass substrate 303 defined by the convex and concave surfaces can be 75 micrometers per 100 mm.

[0048] In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303, defined by the first curved surface 601 and the second curved surface 602, can be 60,000 mm². 2 Or larger, with a thickness uniformity of + / - 25 micrometers per 100 mm. In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303 can range from 60,000 mm². 2 Up to 8 m 2 (square meters) and the thickness uniformity is + / - 25 micrometers per 100 mm. In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303 can range from 60,000 mm². 2 Up to 6 m 2Furthermore, the thickness uniformity is + / - 25 micrometers per 100 mm. In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303 can range from 60,000 mm². 2 up to 3 m 2 Furthermore, the thickness uniformity is + / - 25 micrometers per 100 mm.

[0049] In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303, defined by the first curved surface 601 and the second curved surface 602, can be 60,000 mm². 2 Or larger, with thickness uniformity of + / - 50 micrometers per 100 mm. In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303 can range from 60,000 mm². 2 Up to 8 m 2 Furthermore, the thickness uniformity is ±50 micrometers per 100 mm. In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303 can range from 60,000 mm². 2 Up to 6 m 2 Furthermore, the thickness uniformity is + / - 50 micrometers per 100 mm. In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303 can range from 60,000 mm². 2 up to 3 m 2 Furthermore, the thickness uniformity is + / - 50 micrometers per 100 mm.

[0050] In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303, defined by the first curved surface 601 and the second curved surface 602, can be 60,000 mm². 2 Or larger, with a thickness uniformity of + / - 75 micrometers per 100 mm. In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303 can range from 60,000 mm². 2 Up to 8 m 2 Furthermore, the thickness uniformity is + / - 75 micrometers per 100 mm. In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303 can range from 60,000 mm². 2 Up to 6 m 2 Furthermore, the thickness uniformity is + / - 75 micrometers per 100 mm. In an embodiment, the convex surface area of ​​the curved shape of the reshaped glass substrate 303 can range from 60,000 mm². 2 up to 3 m 2 Furthermore, the thickness uniformity is + / - 75 micrometers per 100 mm.

[0051] In one embodiment, the curved shape of the reshaped glass substrate 303, defined by the first curved surface 601 and the second curved surface 602, can have an optical power distortion of less than 300 millidiopters (mDI) in absolute form, measured by the thickness 603. In another embodiment, the range of optical power distortion of the curved shape of the reshaped glass substrate 303, measured by the thickness 603, can be from 20 mDI to 300 mDI (in absolute form). In yet another embodiment, the range of optical power distortion of the curved shape of the reshaped glass substrate 303, measured by the thickness 603, can be from 50 mDI to 300 mDI (in absolute form). In yet another embodiment, the range of optical power distortion of the curved shape of the reshaped glass substrate 303, measured by the thickness 603, can be from 100 mDI to 300 mDI (in absolute form). The optical power distortion of a curved surface can be measured according to DIN 52305:1995 ("Determining the optical distortion and refractive power of safety glazing material for road vehicles").

[0052] In this embodiment, the non-developable surface shape defined by the first curved surface 601 and the second curved surface 602 comprises a maximum compressive strain shape parameter defined by the imaginary central surface 607 and imaginary surface 600 of the reshaped glass substrate 303. The maximum compressive strain shape parameter represents the complexity of the shape, and the process described herein enables the reshaping of a flat glass substrate into this shape without introducing wrinkles or other significant thickness deviations. The maximum compressive strain shape parameter is primarily a function of the Gaussian curvature associated with the imaginary central surface 607 and its dimensions (e.g., length and width in a specified coordinate system). The thickness of the glass has a slight, but negligible, effect on the maximum compressive strain shape parameter.

[0053] The maximum compressive strain shape parameter can be calculated by simulating the imaginary central surface 607 as an imaginary glass substrate. The properties of the imaginary glass substrate can be independent of the properties of the actual reshaped glass substrate 303 (physically produced via the methods described herein). In one example, the imaginary glass substrate has a thickness of 0.7 mm, a Young's modulus of 71.7 GPa, a Poisson's ratio of 0.21, and a density of 2440 kg / m³. 3The hypothetical glass substrate is discretized into three- or four-sided shell elements (or a combination thereof) associated with a commercially available finite element analyzer. In this embodiment, ANSYS® MECHANICAL™ is used to calculate the shape parameters for maximum compressive strain, where the hypothetical central surface 607 is discretized using SHELL181 elements (the degenerate triangle option is avoided unless used as filler in mesh generation). Specifically, the strain that may exist in the hypothetical glass substrate when it (initially having the shape of the hypothetical central surface 607) is flattened to have a planar shape with hypothetical surface 600 is simulated. Command scripts are used to specify boundary conditions associated with the simulated nodal displacements (e.g., to define the hypothetical surface 600 used for flattening the hypothetical glass substrate). Boundary conditions can also prevent rigid body motion of the hypothetical glass substrate (e.g., by specifying that hypothetical surface 600 is tangent to a portion of the hypothetical central surface 607). The nodes associated with each shell element are displaced along arrow 605 until they are each located on the hypothetical surface 600 (e.g., the z-coordinate of each node is set to zero in the coordinate system established by the boundary conditions, while the x or y coordinate of each node remains unchanged, such that the length and width of the simulated flattened glass plate are the same as the length and width of the simulated initial reshaped glass substrate 303). Finite element analysis, including nonlinear analysis, is performed using an implicit method. The maximum value of the principal strain is the maximum compressive strain shape parameter described herein. The mesh size associated with the shell elements is less than or equal to 0.5 mm to ensure convergent solutions.

[0054] The imaginary center surface 607 is the surface representing the central plane of the reshaped glass substrate 303. Each point on the imaginary center surface 607 is equidistant from the first curved surface 601 and the second curved surface 602 along a direction extending perpendicular to the imaginary center surface 607 at said point.

[0055] In the embodiments, when the glass substrate has a substantially parallelepiped-shaped periphery (or when the radius of curvature of most of the periphery of the glass substrate is greater than 10 m), the following equation can be used to approximate the maximum compressive strain shape parameter associated with the reshaped glass substrate 303: (1) Where k is the average Gaussian curvature of the imaginary central surface 607, l is the length of the imaginary glass substrate simulated as a flattened glass substrate, and w is the width of the flat glass substrate (the units of each constant make the result in mm / m, which can be converted to a percentage by dividing the numerical mm / m result by 10). When the glass substrate contains a substantially circular shape (or when the radius of curvature of most of the outer periphery of the glass substrate is less than 10 m), the maximum compressive strain shape parameter can be mathematically approximated based on the following relationship: (2) Where D is the diameter of the imaginary glass substrate that has been flattened into a circular shape. The units associated with the constants in equations (1) and (2) are set such that the outputs of equations (1) and (2) are in mm / m (which can be converted to a percentage by dividing the output by 10).

[0056] In one embodiment, the curved shape of the reshaped glass substrate 303 can have an optical power distortion of less than 300 millidiopters in absolute form, measured by thickness 603. In another embodiment, the range of optical power distortion of the curved shape of the reshaped glass substrate 303, measured by thickness 603, can be from 20 millidiopters to 300 millidiopters (in absolute form). In yet another embodiment, the range of optical power distortion of the curved shape of the reshaped glass substrate 303, measured by thickness 603, can be from 50 millidiopters to 300 millidiopters (in absolute form). In yet another embodiment, the range of optical power distortion of the curved shape of the reshaped glass substrate 303, measured by thickness 603, can be from 100 millidiopters to 300 millidiopters (in absolute form). The optical power distortion of the curved shape can be measured according to DIN 52305:1995 (“Determination of Optical Distortion and Refractive Power of Road Vehicle Safety Glass Materials”).

[0057] As will be understood, the reshaped glass substrate 407, comprising one or more reshaped glass substrates 303, can have various shapes, and the specific form of the reshaped glass substrate 407 and / or the reshaped glass substrate 303 is not particularly limited. For example, in an embodiment, the outer peripheral shape of the reshaped glass substrate 407 and / or the reshaped glass substrate 303 may include a length (L) extending in a first direction parallel to the imaginary surface 600 and a width (W) extending in a second direction parallel to the imaginary surface 600 and perpendicular to the first direction. The length (L) and width (W) may represent the maximum dimensions of the reshaped glass substrate 407 and / or the reshaped glass substrate 303 in the first and second directions, respectively. In an embodiment, the outer peripheral edge of the reshaped glass substrate 407 and / or the reshaped glass substrate 303 may be substantially parallelepiped (e.g., rectangular) in shape. In an embodiment, the outer peripheral edge of the reshaped glass substrate 407 and / or the reshaped glass substrate 303 may be substantially circular (e.g., such that the radius of curvature of most of the peripheral edge is less than 10 m) and includes a diameter (D) representing the maximum distance between two points on the outer peripheral edge.

[0058] In one embodiment, the reshaped glass substrate 407 and / or the reshaped glass base 303 may have a shape suitable for use as a vehicle windshield. In such embodiments, the reshaped glass substrate 407 and / or the reshaped glass base 303 may be a vehicle windshield or may be incorporated into the windshield. In another embodiment, the reshaped glass substrate 407 and / or the reshaped glass base 303 may have a shape suitable for use as a cover glass for a curved LCD or LED TV screen. In such embodiments, the reshaped glass substrate 407 and / or the reshaped glass base 303 may be a cover glass for a curved LCD or LED TV screen or may be incorporated into the cover glass. In yet another embodiment, it may have a shape suitable for use as a cover glass for a smartphone. In such embodiments, the reshaped glass substrate 407 and / or the reshaped glass base 303 may be a cover glass for a smartphone or may be incorporated into the cover glass.

[0059] In an embodiment, according to the embodiments described herein, the reshaped glass substrate 407 may include a plurality of reshaped glass substrates 303, wherein the reshaped glass substrates 303 are bonded at their peripheral edges. Figure 7 A reshaped glass substrate article 407 is shown, comprising a first reshaped glass substrate 303a having a peripheral edge 702 and a second reshaped glass substrate 303b having a peripheral edge 704. The peripheral edge 702 of the first reshaped glass substrate can be bonded to the peripheral edge 704 of the second reshaped glass substrate 303b. In one embodiment, the peripheral edge 702 can be bonded to the peripheral edge 704 by an adhesive. In another embodiment, the peripheral edge 702 can be bonded to the peripheral edge 704 by a frame structure.

[0060] In an embodiment, the first reshaped glass substrate 303a and the second reshaped glass substrate 303b may have the properties described above for the reshaped glass substrate 303. In an embodiment, when measured at any point between a first point (e.g., point 705a) located anywhere on the peripheral edge 702 of the first reshaped glass substrate 303a and a second point (e.g., point 705a) located anywhere on the curved surface 708a of the first reshaped glass substrate 303a, the maximum curvature of the first reshaped glass substrate 303a may be less than 0.5 m. -1In such embodiments, the maximum curvature is measured along a line (e.g., line 707a) drawn from the first point 705a to the second point 706a and perpendicular to the peripheral edge 702. Similarly, in embodiments, the maximum curvature of the second reshaped glass substrate 303b can be less than 0.5 m when measured at any point between a first point (e.g., point 705b) located anywhere on the peripheral edge 704 of the second reshaped glass substrate 303b and a second point (e.g., point 705b) located anywhere on the curved surface 708b of the second reshaped glass substrate 303b. -1 In such embodiments, the maximum curvature is measured along a line (e.g., line 707b) drawn from the first point 705b to the second point 706b and perpendicular to the peripheral edge 704. Measuring the maximum curvature of the first reshaped glass substrate 303a and the second reshaped glass substrate 303b using the aforementioned points can be performed in the same manner as described above for the reshaped glass substrate 303; for example, the same measurement techniques can be used, and points / lines 705a, 706a, 707a, 705b, 706b, and 707b can be drawn similarly to points / lines 401, 402, and 403.

[0061] In an embodiment, when the remolded glass substrate 407 includes a plurality of glass substrates 303, such as a first glass substrate 303a and a second glass substrate 303b, a first point 705a on the peripheral edge 702 of the first glass substrate 303a can be combined with a first point 705b on the peripheral edge 704 of the second glass substrate 303b, such as... Figure 7 As shown in the image.

[0062] In one embodiment, when the remolded glass substrate 407 comprises multiple glass substrates 303, such as a first glass substrate 303a and a second glass substrate 303b, the peripheral edge 702 of the first glass substrate 303a can be bonded to the peripheral edge 704 of the second glass substrate 303b using an adhesive. Alternatively, when the remolded glass substrate 407 comprises multiple glass substrates 303, such as a first glass substrate 303a and a second glass substrate 303b, the peripheral edge 702 of the first glass substrate 303a can be directly bonded to the peripheral edge 704 of the second glass substrate 303b using an adhesive.

[0063] In one embodiment, the reshaped glass substrate 407 comprises a plurality of glass substrates 303, each of which can be cut from a different glass substrate 200 and individually reshaped using the methods described herein. In another embodiment, the reshaped glass substrate 407 comprises a first glass substrate 303a and a second glass substrate 303b, wherein the first glass substrate 303a and the second glass substrate 303b are each cut from a different glass substrate 200.

[0064] In this embodiment, the optical reflection at the junction of the peripheral edge 702 of the first reshaped glass substrate 303a and the peripheral edge 704 of the second reshaped glass substrate 303b is substantially continuous. In this embodiment, the difference between the curvature at a first point 705a on the peripheral edge 702 of the first glass substrate 303a and the curvature at a first point 705b on the peripheral edge 704 of the second glass substrate 303b is less than 0.2 m. -1 .

[0065] The embodiments of this disclosure can be further understood based on the following aspects: Aspect (1) of this disclosure relates to a reshaped glass substrate comprising: a reshaped glass substrate having a curved shape defined by a first curved surface and a second curved surface, wherein: the maximum compressive strain (MCS) shape parameter of the curved shape is greater than or equal to 0.1%; and the maximum curvature of the curved shape at any point between the first and second points is less than 0.5 m. -1 Wherein: the first point is located at the outer edge of the reshaped glass substrate; the second point is located at a distance of 50 mm to 100 mm from the first point on the curved surface; and the first line drawn from the first point to the second point is perpendicular to the outer edge where the first point is located.

[0066] Aspect (2) of this disclosure relates to a reshaped glass article according to aspect (1), wherein the maximum curvature of the curved surface shape at any point between the first point and the second point is less than 0.2 m. -1 .

[0067] Aspect (3) of this disclosure relates to a reshaped glass article according to aspect (1) or aspect (2), wherein the reshaped glass article comprises a plurality of laminated reshaped glass substrates.

[0068] Aspect (4) of this disclosure relates to a reshaped glass article according to any one of aspects (1) to (3), wherein the reshaped glass substrate is a first reshaped glass substrate, and the article includes a second reshaped glass substrate, the second reshaped glass substrate being bonded to the peripheral edge of the first reshaped glass substrate.

[0069] Aspect (5) of this disclosure relates to a reshaped glass article according to aspect (4), wherein the second reshaped glass substrate comprises: a second curved shape defined by a third curved surface and a fourth curved surface, wherein: the maximum compressive strain (MCS) shape parameter of the second curved shape is greater than or equal to 0.1%; and the maximum curvature of the second curved shape is less than 0.5 m when measured at any point between the third and fourth points. -1 The third point is located at the outer edge of the second reshaped glass substrate; the fourth point is located at a distance of 50 mm to 100 mm from the third point on the second curved surface; and the second line drawn from the third point to the fourth point is perpendicular to the outer edge where the third point is located.

[0070] Aspect (6) of this disclosure relates to a reshaped glass article according to aspect (4) or aspect (5), wherein the optical reflection at the location where the peripheral edge of the first reshaped glass substrate joins the peripheral edge of the second reshaped glass substrate is substantially continuous.

[0071] Aspect (7) of this disclosure relates to a reshaped glass article according to aspect (5), wherein the first point at the peripheral edge of the first reshaped glass substrate is combined with the third point at the peripheral edge of the second reshaped glass substrate.

[0072] Aspect (8) of this disclosure relates to a reshaped glass article according to aspect (7), wherein the difference between the curvature at the first point and the curvature at the third point is less than 0.2 m. -1 .

[0073] Aspect (9) of this disclosure relates to a reshaped glass article according to any one of aspects (5) to (8), wherein the peripheral edge of the first reshaped glass substrate is directly bonded to the peripheral edge of the second reshaped glass substrate by an adhesive.

[0074] Aspect (10) of this disclosure relates to a reshaped glass article according to any one of aspects (1) to (9), wherein the reshaped glass article is a vehicle windshield.

[0075] Aspect (11) of this disclosure relates to a method for producing a reshaped glass substrate article, the method comprising: cutting a glass substrate to produce an oversized preformed glass substrate; forming the oversized preformed glass substrate to produce an oversized preformed glass substrate containing a curved oversized region formed within a cavity of a reshaped apparatus; and cutting the curved oversized region to produce the reshaped glass substrate article, wherein the reshaped glass substrate article comprises: a reshaped glass substrate, the reshaped glass substrate comprising a first curved shape defined by a first curved surface and a second curved surface, wherein: the maximum compressive strain (MCS) shape parameter of the first curved shape is greater than or equal to 0.1%; and the maximum curvature of the first curved shape is less than 0.5 m when measured at any point between the first point and the second point. -1 Wherein: the first point is located at the outer edge of the reshaped glass substrate; the second point is located at a distance of 50 mm to 100 mm from the first point on the curved surface; and the first line drawn from the first point to the second point is perpendicular to the outer edge where the first point is located.

[0076] Aspect (12) of this disclosure relates to the method according to aspect (11), wherein the cutting removes excess glass from the reshaped glass substrate, the excess glass comprising a first edge and a second edge, and wherein the maximum curvature of the excess glass, measured at any point between the first edge and the second edge, is greater than or equal to 0.5 m. -1 .

[0077] Aspect (13) of this disclosure relates to the method according to aspect (11) or aspect (12), wherein the reshaped glass substrate is a reshaped first glass substrate, and the reshaped glass substrate article includes a reshaped second glass substrate, the reshaped second glass substrate being bonded to the peripheral edge of the first reshaped glass substrate.

[0078] Aspect (14) of this disclosure relates to a method according to aspect (13), wherein the second reshaped glass substrate comprises: a second curved shape defined by a third curved surface and a fourth curved surface, wherein: the maximum compressive strain (MCS) shape parameter of the second curved shape is greater than or equal to 0.1%; and the maximum curvature of the second curved shape is less than 0.5 m when measured at any point between the third and fourth points.-1 The third point is located at the outer edge of the second glass substrate reshaped plate; the fourth point is located at a distance of 50 mm to 100 mm from the third point on the second curved surface; and the second line drawn from the third point to the fourth point is perpendicular to the outer edge where the third point is located.

[0079] Aspect (15) of this disclosure relates to the method according to aspect (13) or aspect (14), wherein the optical reflection at the location where the peripheral edge of the first reshaped glass substrate joins the peripheral edge of the second reshaped glass substrate is substantially continuous.

[0080] Aspect (16) of this disclosure relates to the method according to aspect (14) or aspect (15), wherein the first point at the peripheral edge of the first reshaped glass substrate is combined with the third point at the peripheral edge of the second reshaped glass substrate.

[0081] Aspect (17) of this disclosure relates to the method according to aspect (16), wherein the difference between the curvature at the first point and the curvature at the third point is less than 0.2 m. -1 .

[0082] Aspect (18) of this disclosure relates to a method according to any one of aspects (14) to (17), wherein the peripheral edge of the first reshaped glass substrate is directly bonded to the peripheral edge of the second reshaped glass substrate by an adhesive.

[0083] Aspect (19) of this disclosure relates to a method according to any one of aspects (11) to (18), which further comprises grinding the edges of the reshaped glass substrate article using three-dimensional edge grinding.

[0084] Aspect (20) of this disclosure relates to a method according to any one of aspects (11) to (19), wherein cutting the large curved surface region is performed using three-dimensional laser cutting.

[0085] Aspect (21) of this disclosure relates to a method according to any one of aspects (11) to (20), wherein the reshaped glass substrate is a vehicle windshield.

[0086] While various embodiments have been described herein, these embodiments are presented by way of example and not limitation. It will be apparent to those skilled in the art that adaptations and modifications are intended to be within the meaning and scope of equivalents of the disclosed embodiments, based on the teachings and guidance presented herein. Therefore, it will be apparent to those skilled in the art that various changes in form and detail may be made to the embodiments disclosed herein without departing from the spirit and scope of this disclosure. As will be understood by those skilled in the art, the elements of the embodiments presented herein are not necessarily mutually exclusive, but can be interchanged to satisfy various situations.

[0087] This document describes embodiments of the present disclosure in detail with reference to the accompanying drawings, wherein like reference numerals are used to denote like or functionally similar elements. References to "embodiments," "an embodiment," etc., indicate that the described embodiments may include specific features, structures, or characteristics, but each embodiment may not necessarily include specific features, structures, or characteristics. Furthermore, these phrases do not necessarily refer to the same embodiment. Additionally, when a specific feature, structure, or characteristic is described in connection with embodiments, it should be understood that those skilled in the art will know that such features, structures, or characteristics can be affected by combinations with other embodiments, whether explicitly described or not.

[0088] Examples are illustrative and not limiting of this disclosure. Other suitable modifications and adaptations to various conditions and parameters commonly encountered in the art and obvious to those skilled in the art are permitted within the spirit and scope of this disclosure.

[0089] The indefinite article “a / an” used to describe an element or component indicates the presence of one or more of these elements or components. While these articles are generally used to indicate that the noun being modified is singular, the article “a / an” as used herein also includes plural nouns unless otherwise stated in specific instances. Similarly, the definite article “the” as used herein also indicates that the noun being modified can be either singular or plural, unless otherwise stated in specific instances.

[0090] The directional terms used in this document (e.g., up, down, right, left, front, back, top, bottom, inward, outward) are used only with reference to the accompanying drawings and are not intended to imply absolute orientation.

[0091] As used in the claims, “comprising” is an open-ended transitional phrase. The list of elements following the transitional phrase “comprising” is a non-exclusive list, allowing for the possible presence of elements other than those specifically described in the list. As used in the claims, “consisting essentially of” or “composed essentially of” limits the composition of the material to the specified material and those that do not substantially affect the material’s fundamental and novel properties. As used in the claims, “consisting of” or “composed entirely of” limits the composition of the material to the specified material and excludes any unspecified material.

[0092] Where numerical ranges containing upper and lower limits are described herein, unless otherwise stated in specific circumstances, the ranges are intended to include their endpoints, as well as all integers and fractions within the range. When a range is defined, the scope of the claims is not intended to be limited to the specific value stated. Furthermore, when a quantity, concentration, or other value or parameter is given in the form of a range, one or more preferred ranges, or a list of preferred upper and lower limits, this should be understood to specifically disclose all ranges formed by any pair of any upper or preferred range value and any lower or preferred range value, whether or not such pairs are disclosed individually.

[0093] The above description of this embodiment has used functional building blocks to illustrate implementations of specific functions and their relationships. For ease of description, the boundaries of these functional building blocks have been arbitrarily defined herein. Alternative boundaries may be defined, provided that the specified functions and their relationships are appropriately performed.

[0094] It should be understood that the wording or terminology used herein is for descriptive purposes and not for limitation. The breadth and scope of this disclosure should not be limited to any of the exemplary embodiments described above, but should be defined in accordance with the appended claims and their equivalents.

Claims

1. A reshaped glass-based article comprising: A reshaped glass substrate, the reshaped glass substrate comprising a curved shape defined by a first curved surface and a second curved surface, wherein: The maximum compressive strain (MCS) shape parameter of the surface shape is greater than or equal to 0.1%; and The maximum curvature of the surface shape at any point between the first and second points is less than 0.5 m. -1 ,in: The first point is located at the outer edge of the reshaped glass substrate; The second point is located on the curved surface at a distance of 50 mm to 100 mm from the first point; and The first line drawn from the first point to the second point is perpendicular to the outer edge where the first point is located.

2. The reshaped glass-based article of claim 1, wherein the maximum curvature of the surface shape at any point between the first point and the second point is less than 0.2 m. -1 .

3. The reshaped glass substrate article according to claim 1 or 2, wherein the reshaped glass substrate article comprises a plurality of laminated reshaped glass substrates.

4. The reshaped glass substrate article according to any one of claims 1 to 3, wherein the reshaped glass substrate is a first reshaped glass substrate, and the article includes a second reshaped glass substrate, the second reshaped glass substrate being bonded to the peripheral edge of the first reshaped glass substrate.

5. The reshaped glass substrate article of claim 4, wherein the second reshaped glass substrate comprises: The second surface shape, defined by the third and fourth surface surfaces, wherein: The maximum compressive strain (MCS) shape parameter of the second surface shape is greater than or equal to 0.1%; and When measured at any point between the third and fourth points, the maximum curvature of the second surface shape is less than 0.5m. -1 ,in: The third point is located at the outer edge of the second reshaped glass substrate; The fourth point is located on the second curved surface at a distance of 50 mm to 100 mm from the third point; and The second line drawn from the third point to the fourth point is perpendicular to the outer edge where the third point is located.

6. The reshaped glass substrate article according to claim 4 or 5, wherein the optical reflection at the location where the peripheral edge of the first reshaped glass substrate joins the peripheral edge of the second reshaped glass substrate is substantially continuous.

7. The reshaped glass substrate article of claim 5, wherein the first point at the peripheral edge of the first reshaped glass substrate is coupled to the third point at the peripheral edge of the second reshaped glass substrate.

8. The reshaped glass-based article of claim 7, wherein the difference between the curvature at the first point and the curvature at the third point is less than 0.2 m. -1 .

9. The reshaped glass substrate article according to any one of claims 5 to 8, wherein the peripheral edge of the first reshaped glass substrate is directly bonded to the peripheral edge of the second reshaped glass substrate by an adhesive.

10. The reshaped glass-based article according to any one of claims 1 to 9, wherein the reshaped glass-based article is a vehicle windshield.

11. A method for producing a reshaped glass-based article, the method comprising: Cut the glass substrate to produce an ultra-large preformed glass substrate; The ultra-large preformed glass substrate is formed to produce an ultra-large preformed glass substrate containing a curved ultra-large region formed within the cavity of the re-forming device; and Cutting the large curved area to produce the reshaped glass-based article, wherein the reshaped glass-based article comprises: A reshaped glass substrate, the reshaped glass substrate comprising a first curved surface shape defined by a first curved surface and a second curved surface, wherein: The maximum compressive strain (MCS) shape parameter of the first surface shape is greater than or equal to 0.1%; and When measured at any point between the first and second points, the maximum curvature of the first surface shape is less than 0.5m. -1 ,in: The first point is located at the outer edge of the reshaped glass substrate; The second point is located on the curved surface at a distance of 50 mm to 100 mm from the first point; and The first line drawn from the first point to the second point is perpendicular to the outer edge where the first point is located.

12. The method of claim 11, wherein the cutting removes excess glass from the reshaped glass substrate, the excess glass comprising a first edge and a second edge, and wherein the maximum curvature of the excess glass, measured at any point between the first edge and the second edge, is greater than or equal to 0.5 m. -1 .

13. The method of claim 11 or 12, wherein the reshaped glass substrate is a reshaped first glass substrate, and the reshaped glass substrate comprises a reshaped second glass substrate, the reshaped second glass substrate being bonded to the peripheral edge of the first reshaped glass substrate.

14. The method of claim 13, wherein the second reshaped glass substrate comprises: The second surface shape, defined by the third and fourth surface surfaces, wherein: The maximum compressive strain (MCS) shape parameter of the second surface shape is greater than or equal to 0.1%; and When measured at any point between the third and fourth points, the maximum curvature of the second surface shape is less than 0.5m. -1 ,in: The third point is located at the outer edge of the second glass substrate reshaped plate; The fourth point is located on the second curved surface at a distance of 50 mm to 100 mm from the third point; and The second line drawn from the third point to the fourth point is perpendicular to the outer edge where the third point is located.

15. The method of claim 13 or 14, wherein the optical reflection at the location where the peripheral edge of the first reshaped glass substrate joins the peripheral edge of the second reshaped glass substrate is substantially continuous.

16. The method of claim 14 or 15, wherein the first point at the peripheral edge of the first reshaped glass substrate is combined with the third point at the peripheral edge of the second reshaped glass substrate.

17. The method of claim 16, wherein the difference between the curvature at the first point and the curvature at the third point is less than 0.2 m. -1 .

18. The method according to any one of claims 14 to 17, wherein the peripheral edge of the first reshaped glass substrate is directly bonded to the peripheral edge of the second reshaped glass substrate by an adhesive.

19. The method according to any one of claims 11 to 18, further comprising using three-dimensional edge grinding to grind the edges of the reshaped glass-based article.

20. The method according to any one of claims 11 to 19, wherein the cutting of the large curved area is performed using three-dimensional laser cutting.

21. The method according to any one of claims 11 to 20, wherein the reshaped glass substrate is a vehicle windshield.

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