Glass product, display device, and electronic device

Abstract

The invention relates to a glass product, a display device and an electronic device. The display device includes: a display panel including a plurality of pixels; a cover window on the display panel; and an optically transparent bonding layer between the display panel and the cover window, in which the cover window includes, as a glass composition, 45 mol% to 60 mol% of SiO2, greater than 35 mol% and less than or equal to 45 mol% of B2O3, greater than or equal to 3 mol% and less than 9 mol% of Na2O, and greater than 0 mol% and less than 8 mol% of Al2O3, based on a total content of the cover window.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to and all benefits arising therefrom of Korean Patent Application No. 10-2024-0148559, filed on October 28, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to glass compositions, glass articles made from glass compositions, display devices, and electronic devices. Background Technology

[0004] Glass products are widely used in electronic devices, including display devices, and building materials. For example, glass products are used as substrates for flat panel display devices (such as liquid crystal displays (LCDs), organic light-emitting displays (OLEDs), or electrophoretic displays), or as cover windows to protect display devices.

[0005] With the growth of portable electronic devices such as smartphones and tablet PCs, glass products used in these devices are frequently subjected to external impacts. Therefore, there is a need to develop a thin, lightweight glass product that is portable and can withstand external impacts.

[0006] Recently, research has been conducted on foldable display devices for user convenience. Glass components used in foldable display devices may need to have a small thickness to reduce bending stress when the display device is folded, while simultaneously possessing sufficient strength to withstand external impacts. Therefore, attempts have been made to improve the strength of thin glass components by altering the composition ratio of the glass composition and the manufacturing process conditions. Summary of the Invention

[0007] This disclosure provides glass compositions having novel composition ratios, glass articles made from the glass compositions, and display devices including the glass articles.

[0008] However, the aspects of this disclosure are not limited to those set forth herein. These and other aspects of the disclosure will become more apparent to those skilled in the art upon which this disclosure pertains from the following detailed description.

[0009] According to one or more embodiments of the present disclosure, as a glass composition, the glass article comprises: 45 mol% to 60 mol% of SiO2, greater than 35 mol% and less than or equal to 45 mol% of B2O3, greater than or equal to 3 mol% and less than 9 mol% of Na2O, and greater than 0 mol% and less than 8 mol% of Al2O3, based on the total content of the glass article.

[0010] In the embodiments, the ratio of SiO2 content to B2O3 content can be 1 or greater.

[0011] In the embodiments, the difference between the B2O3 content and the Na2O content can be 40 mol% or less.

[0012] In the embodiments, the ratio of Na2O content to Al2O3 content can be greater than 1.

[0013] In the embodiments, the glass article may also include K2O in an amount greater than 0 mol% and less than or equal to 5 mol%.

[0014] In the embodiments, the ratio of the sum of Na2O content and K2O content to Al2O3 content can be greater than 1.

[0015] In the embodiments, the thickness of the glass article can be from 50 micrometers (μm) to 100 micrometers (μm).

[0016] In the embodiments, the elastic modulus of the glass article can be from 30 gigapascals (GPa) to 55 gigapascals (GPa).

[0017] According to one or more embodiments of the present disclosure, the glass composition comprises, based on the total content of the glass composition, 45 mol% to 60 mol% of SiO2, greater than 35 mol% and less than or equal to 45 mol% of B2O3, greater than or equal to 3 mol% and less than 9 mol% of Na2O, and greater than 0 mol% and less than 8 mol% of Al2O3.

[0018] In the embodiments, the ratio of SiO2 content to B2O3 content can be 1 or greater.

[0019] In the embodiments, the difference between the B2O3 content and the Na2O content can be 40 mol% or less.

[0020] In the embodiments, the ratio of Na2O content to Al2O3 content can be greater than 1.

[0021] In the embodiments, the glass composition may also include K2O in an amount greater than 0 mol% and less than or equal to 5 mol%.

[0022] In the embodiments, the ratio of the sum of Na2O content and K2O content to Al2O3 content can be greater than 1.

[0023] According to one or more embodiments of the present disclosure, a display device includes: a display panel including a plurality of pixels; a cover window located on the display panel; and an optically transparent bonding layer located between the display panel and the cover window, wherein, as a glass composition, the cover window includes: 45 mol% to 60 mol% of SiO2, greater than 35 mol% and less than or equal to 45 mol% of B2O3, greater than or equal to 3 mol% and less than 9 mol% of Na2O, and greater than 0 mol% and less than 8 mol% of Al2O3, based on the total content of the cover window.

[0024] In the embodiments, the ratio of SiO2 content to B2O3 content can be 1 or greater.

[0025] In the embodiments, the difference between the B2O3 content and the Na2O content can be 40 mol% or less, and the ratio of the Na2O content to the Al2O3 content can be greater than 1.

[0026] In an embodiment, the display device may further include K2O in an amount greater than 0 mol% and less than or equal to 5 mol%, wherein the ratio of the sum of Na2O content and K2O content to Al2O3 content may be greater than 1.

[0027] In this embodiment, the cover window may have a thickness of 50 μm to 100 μm.

[0028] In an embodiment, the covering window may have an elastic modulus of 30 GPa to 55 GPa.

[0029] According to one or more embodiments of this disclosure, an electronic device includes: a display device configured to provide an image; and a processor configured to provide image data signals to the display device, wherein the display device includes: a display panel including a plurality of pixels; a cover window located on the display panel; and an optically transparent bonding layer located between the display panel and the cover window. As a glass composition, the cover window includes: 45 mol% to 60 mol% SiO2, greater than 35 mol% and less than or equal to 45 mol% B2O3, greater than or equal to 3 mol% and less than 9 mol% Na2O, and greater than 0 mol% and less than 8 mol% Al2O3, based on the total content of the cover window. Attached Figure Description

[0030] These and / or other aspects will become apparent and more readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0031] Figure 1These are perspective views of glass articles according to various embodiments;

[0032] Figure 2 This is a perspective view showing the unfolded state of a display device to which a glass article according to an embodiment is applied;

[0033] Figure 3 It is shown Figure 2 A perspective view of the display device in its folded state;

[0034] Figure 4 This is a cross-sectional view illustrating an example of a glass article used as a cover window for a display device according to an embodiment;

[0035] Figure 5 This is a cross-sectional view of a glass article in the shape of a flat plate according to an embodiment;

[0036] Figure 6 It shows the basis Figure 5 A graph showing the stress distribution of the glass article in the embodiment;

[0037] Figure 7 This is a flowchart illustrating the operations in the process of manufacturing glass articles according to an embodiment;

[0038] Figure 8 It is shown Figure 7 A schematic diagram of a series of operations from cutting to surface polishing after tempering;

[0039] Figure 9 This is a block diagram of an electronic device according to an embodiment of the present disclosure; and

[0040] Figure 10 This is a schematic diagram of an electronic device according to various embodiments of the present disclosure. Detailed Implementation

[0041] In the following description, the invention will now be described more fully with reference to the accompanying drawings, in which preferred embodiments of the invention are illustrated. However, the invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0042] It will also be understood that when a layer or substrate is referred to as being "on" another layer or substrate, the layer or substrate may be directly on the other layer or substrate, or an intermediary layer may be present. Throughout the specification, the same reference numerals refer to the same components.

[0043] It will be understood that although terms such as "first," "second," etc., are used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, a first element discussed below may be referred to as a second element without departing from the teachings of the invention. Similarly, a second element may also be referred to as a first element.

[0044] Each of the various features of the embodiments of this disclosure can be combined or integrated with each other in part or in whole, and various technical interlocks and drives are possible. Each embodiment can be implemented independently of each other or can be implemented in combination.

[0045] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the terms “a,” “an,” “the,” and “at least one” as used herein do not indicate a limitation of quantity and are intended to include both singular and plural forms. Unless the context clearly indicates otherwise, for example, “an element” and “at least one element” have the same meaning. “At least one” is not construed as limited to “a” or “an.” “Or” means “and / or.” The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items. It will be further understood that, when used in this specification, the terms “comprises and / or comprising” or “includes and / or including” indicate the presence of the stated features, areas, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, areas, integrals, steps, operations, elements, components, and / or groups thereof. In this document, embodiments will be described with reference to the accompanying drawings.

[0046] Figure 1 These are perspective views of glass articles 100 to 103 according to various embodiments.

[0047] In electronic devices including displays (such as tablet PCs, laptop PCs, smartphones, e-readers, televisions, and PC monitors) and refrigerators and washing machines that include display screens, glass is used as a cover window to protect the display, as a substrate for display panels, as a substrate for touch panels, and as an optical element such as a light guide plate. Glass is also used as a cover glass for vehicle dashboards, a cover glass for solar cells, an interior building material, and windows for buildings or houses.

[0048] Glass needs to be high-strength. For example, glass used in windows needs to be thin to have high light transmittance and light weight, but it also needs to be strong enough to not be easily broken by external impacts. Glass with increased strength can be produced using methods such as chemical tempering or thermal tempering. Figure 1 Examples of tempered glass in various shapes are shown in the image.

[0049] In the following description, glass articles are described, but glass articles may refer to the same glass as described above.

[0050] refer to Figure 1 In one embodiment, the glass article 100 may be in the shape of a flat sheet or plate. In other embodiments, the glass articles 101 to 103 may have a three-dimensional (3D) shape including bent portions. For example, the glass article may include a flat portion with bent edges (see glass article 101), may be bent overall (see glass article 102), or may be foldable (see glass article 103). Alternatively, the glass article 100 may be shaped similarly to a flat sheet or plate, but may be flexible, allowing the glass article 100 to be folded, stretched, or rolled.

[0051] Glass articles 100 to 103 may have a rectangular planar shape. However, glass articles 100 to 103 are not limited to a rectangular planar shape, and may also have various planar shapes such as rectangles, squares, circles, and ellipses with rounded corners. In the following embodiments, a flat plate with a rectangular planar shape will be described as an example of glass articles 100 to 103. However, this disclosure is obviously not limited thereto.

[0052] Figure 2 This is a perspective view showing the unfolded state of a display device 500 to which a glass article is applied according to an embodiment. Figure 3 It is shown Figure 2 A perspective view of the folded state of the display device 500.

[0053] Reference Figure 2 and Figure 3 The display device 500 according to the embodiment may be a foldable display device. As will be described below, Figure 1 The glass article 100 can be used as a cover window in the display device 500. The glass article 100 can be flexible, allowing it to be folded.

[0054] exist Figure 2 and Figure 3In the plan view, the first direction DR1 can be a direction parallel to one side of the display device 500, for example, the horizontal direction of the display device 500. The second direction DR2 can be a direction parallel to the other side of the display device 500 that is in contact with the aforementioned side, for example, the vertical direction of the display device 500. The third direction DR3 can be the thickness direction of the display device 500.

[0055] In this embodiment, the display device 500 may be rectangular in plan view. The display device 500 may be shaped like a rectangle with vertical corners or a rectangle with rounded corners in plan view. The display device 500 may include two short sides located in the first direction DR1 and two long sides located in the second direction DR2 in plan view.

[0056] The display device 500 includes a display area DA and a non-display area NDA. In a plan view, the shape of the display area DA may correspond to the shape of the display device 500. For example, when the display device 500 is rectangular in a plan view, the display area DA may also be rectangular.

[0057] The display area DA can be an area comprising multiple pixels for displaying an image. Pixels can be arranged in a matrix. Each of the multiple pixels can be shaped as a rectangle, rhombus, or square in a planar view. However, this disclosure is not limited thereto. For example, each of the multiple pixels can also be shaped as a quadrilateral other than a rectangle, rhombus, or square, a polygon other than a quadrilateral, a circle, or an ellipse in a planar view.

[0058] Because the non-display area NDA does not include pixels, it can be an area where no image is displayed. The non-display area NDA can be located around the display area DA. The non-display area NDA can surround the display area DA. However, this disclosure is not limited thereto. The display area DA can also be partially surrounded by the non-display area NDA.

[0059] In this embodiment, the display device 500 can maintain both a folded state and an unfolded state. For example... Figure 3 As shown, the display device 500 can be folded in an inward fold with the display area DA located inside. When the display device 500 is folded in an inward fold, portions of the upper surfaces of the display device 500 can face each other. Alternatively, the display device 500 can be folded in an outward fold with the display area DA located outside. When the display device 500 is folded in an outward fold, portions of the lower surfaces of the display device 500 can face each other.

[0060] In an embodiment, the display device 500 may be a foldable display device. In this specification, the term "foldable display device" refers to a display device capable of being folded, which includes not only foldable display devices but also display devices capable of having both a folded state and an unfolded state. Furthermore, folding typically includes folding at an angle of approximately 180 degrees. However, this disclosure is not limited to this, and folding at angles greater than or less than 180 degrees (such as folding at an angle greater than or equal to 90 degrees and less than 180 degrees, or folding at an angle greater than or equal to 120 degrees and less than 180 degrees) can also be understood as folding. Furthermore, even a partially folded state can be referred to as a folded state if it is not an unfolded state. For example, as long as the maximum folding angle is 90 degrees or greater, a folded state at an angle of 90 degrees or less can be expressed as a folded state to distinguish it from an unfolded state. The radius of curvature during folding can be 5 millimeters (mm) or less, preferably 1 mm to 2 mm or approximately 1.5 mm. However, this disclosure is not limited to this.

[0061] In an embodiment, the display device 500 may include a folded region FDA, a first non-folded region NFA1, and a second non-folded region NFA2. The folded region FDA may be an area of ​​the display device 500 that is folded, and the first non-folded region NFA1 and the second non-folded region NFA2 may be areas of the display device 500 that are not folded.

[0062] The first non-folded region NFA1 may be located on one side of the folded region FDA (e.g., the upper side). The second non-folded region NFA2 may be located on the other side of the folded region FDA (e.g., the lower side). The folded region FDA may be a region that is curved with a predetermined curvature.

[0063] In this embodiment, the folding area FDA of the display device 500 can be set at a specific location. In the display device 500, one folding area FDA or two or more folding areas FDA can be set at a specific location. In this embodiment, the folding area FDA in the display device 500 is not limited to a specific location, but can be freely set in various areas.

[0064] In this embodiment, the display device 500 can be folded in the second direction DR2. Therefore, the length of the display device 500 in the second direction DR2 can be reduced to approximately half. Thus, the user can easily carry the display device 500.

[0065] In this embodiment, the direction in which the display device 500 is folded is not limited to the second direction DR2. For example, the display device 500 may also be folded in the first direction DR1. In this case, the length of the display device 500 in the first direction DR1 may be reduced to approximately half.

[0066] In the accompanying drawings, each of the display area DA and the non-display area NDA overlaps with the folded area FDA, the first non-folded area NFA1, and the second non-folded area NFA2. However, this disclosure is not limited thereto. For example, each of the display area DA and the non-display area NDA may overlap with at least one of the folded area FDA, the first non-folded area NFA1, and the second non-folded area NFA2.

[0067] Figure 4 This is a cross-sectional view showing an example of a glass article 100 used as a cover window for a display device 500 according to an embodiment.

[0068] Reference Figure 4 The display device 500 may include a display panel 200, a glass article 100 located on the display panel 200 and serving as a “covering window”, and an optically transparent bonding layer 300 located between the display panel 200 and the glass article 100 to bond the display panel 200 and the glass article 100 together.

[0069] For example, the display panel 200 may be a self-emissive display panel (such as an organic light-emitting diode (OLED) display panel, an inorganic electroluminescent (EL) display panel, a quantum dot light-emitting (QLED) display panel, a micro light-emitting diode (LED) display panel, a nano LED display panel, a plasma display panel (PDP), a field emission display (FED) panel, or a cathode ray tube (CRT) display panel), or it may be a light-receiving display panel (such as a liquid crystal display (LCD) panel or an electrophoretic display (EPD) panel).

[0070] The display panel 200 may include a plurality of pixels PX, and can display images using light emitted from each pixel PX. The display device 500 may also include a touch component (not shown). In embodiments, the touch component may be integrated into the display panel 200. For example, the touch component may be formed directly on a display component of the display panel 200, enabling the display panel 200 itself to perform touch functionality. In embodiments, the touch component may be manufactured separately from the display panel 200 and then attached to the upper surface of the display panel 200 via an optically transparent bonding layer.

[0071] A glass article 100 is positioned on the display panel 200 to protect it. The glass article 100 may be larger than the display panel 200 in size. Therefore, the side surface SS of the glass article 100 may protrude outwards than the side surface of the display panel 200, but this disclosure is not limited to this. The display device 500 may also include a printed layer (not shown) on at least one surface of the glass article 100 at its edge. The printed layer may prevent the bezel area of ​​the display device 500 from being visible from the outside, and in some cases, the printed layer may perform a decorative function.

[0072] An optically clear bonding layer 300 is located between the display panel 200 and the glass article 100. The optically clear bonding layer 300 secures the glass article 100 to the display panel 200. The optically clear bonding layer 300 may include an optically clear adhesive (OCA) or an optically clear resin (OCR).

[0073] The tempered glass product 100 described above will now be described in more detail.

[0074] Figure 5 This is a cross-sectional view of a flat glass article 100 according to an embodiment.

[0075] Reference Figure 5 The glass article 100 may include a first surface US, a second surface RS, and a side surface SS. The first surface US and the second surface RS of the flat glass article 100 are main surfaces with a large area, and the side surface SS is an outer surface connecting the first surface US and the second surface RS.

[0076] The first surface US and the second surface RS are back-to-back with each other in the thickness direction. When the glass article 100 is used to transmit light, such as a cover window for a display, light can typically be incident on either the first surface US or the second surface RS, and then transmitted to the other surface of the first surface US and the second surface RS.

[0077] The thickness t of the glass article 100 is defined as the distance between the first surface US and the second surface RS. The thickness t of the glass article 100 can be, but is not limited to, 100 μm or less, preferably 20 μm to 100 μm. In an embodiment, the thickness t of the glass article 100 can be 80 μm or less. In an embodiment, the thickness t of the glass article 100 can be approximately 75 μm or less. In an embodiment, the thickness t of the glass article 100 can be approximately 70 μm or less. In an embodiment, the thickness t of the glass article 100 can be approximately 65 μm or less. In an embodiment, the thickness t of the glass article 100 can be approximately 60 μm or less. In an embodiment, the thickness t of the glass article 100 can be approximately 50 μm or less. In an embodiment, the thickness t of the glass article 100 can be approximately 30 μm or less. In some specific embodiments, the thickness t of the glass article 100 can be in the range of 20 μm to 50 μm or can have a value of approximately 30 μm. The glass article 100 can have a uniform thickness t. However, this disclosure is not limited thereto, and the glass article 100 may also have different thicknesses t in each zone.

[0078] Glass article 100 can be tempered to have a predetermined stress profile therein. Tempered glass article 100 is better protected against crack initiation, crack propagation, and breakage due to external impact than untempered glass article 100. The tempered glass article 100 can have various stresses in different zones. For example, compressive stresses acting in compression zones CSR1 and CSR2 can be located near the surface of the glass article 100 (i.e., near the first surface US and the second surface RS), and tensile stresses acting in tensile zone CTR can be located inside the glass article 100. The stress value can be zero at the boundaries DOC1 and DOC2 (hereinafter also referred to as compression depths DOC1 and DOC2) between compression zones CSR1 and CSR2 and tensile zone CTR. The compressive stress in a compression zone CSR1 or CSR2 can have different stress values ​​depending on its location (i.e., its depth from the surface). Furthermore, the tensile zone CTR can have different stress values ​​depending on its depth from the surface US or RS.

[0079] The location of the compression zones CSR1 and CSR2 in the glass article 100, the stress distribution in the compression zones CSR1 and CSR2, and the compressive energy of the compression zones CSR1 and CSR2 or the tensile energy of the tensile zone CTR can greatly affect the mechanical properties of the glass article 100, such as surface strength.

[0080] Figure 6 It shows the basis Figure 5 A graph showing the stress distribution of the glass article 100 in the embodiment. Figure 6In the graph, the x-axis (horizontal axis) represents the thickness direction of the glass product 100. Figure 6 In this specification, compressive stress is represented by positive values, and tensile stress by negative values. Regardless of the sign of the value, the magnitude of the compressive / tensile stress indicates the absolute value, not the sign of the value.

[0081] Reference Figure 6 and combined Figure 5 The glass article 100 includes a first compression region CSR1 extending (or expanding) from a first surface US to a first compression depth DOC1, and a second compression region CSR2 extending (or expanding) from a second surface RS to a second compression depth DOC2. A tensile region CTR is located between the first compression depth DOC1 and the second compression depth DOC2. In the overall stress distribution of the glass article 100, the regions on both surfaces US and RS can be symmetrical about each other with respect to the center in the thickness t direction. Although in Figure 6 Although not shown, the compression zone and the stretching zone may also be located in a similar manner between the opposite side surfaces of the glass article 100.

[0082] The first compression zone CSR1 and the second compression zone CSR2 resist external impacts to prevent the formation of cracks in the glass article 100 or the breakage of the glass article 100. The greater the maximum compressive stresses CS1 and CS2 in the first compression zone CSR1 and the second compression zone CSR2, the greater the strength of the glass article 100. Since external impacts are generally transmitted through the surface of the glass article 100, it is advantageous to have maximum compressive stresses CS1 and CS2 at the surface of the glass article 100 in terms of durability. In this respect, the compressive stresses of the first compression zone CSR1 and the second compression zone CSR2 tend to be maximum at the surface and gradually decrease in the direction toward the interior of the glass article 100.

[0083] The first compression depth DOC1 and the second compression depth DOC2 prevent cracks or grooves formed in the first surface US and the second surface RS from propagating into the tensile zone CTR inside the glass article 100. The larger the first compression depth DOC1 and the second compression depth DOC2, the better the crack propagation is prevented. The points corresponding to the first compression depth DOC1 and the second compression depth DOC2 correspond to the boundaries between the compression zones CSR1 and CSR2 and the tensile zone CTR, and have a stress value of 0.

[0084] In the entire glass article 100, the tensile stress in the tensile zone CTR can be balanced with the compressive stress in the compression zones CSR1 and CSR2. That is, the total compressive stress (i.e., compressive energy) in the glass article 100 can be equal to the total tensile stress (i.e., tensile energy). The stress energy accumulated in a region with a predetermined width in the thickness t direction of the glass article 100 can be calculated by integrating the stress distribution. When the stress distribution in the glass article 100 with thickness t is represented by the function f(x), the following equation (1) can be established:

[0085]

[0086] As the tensile stress inside the glass article 100 increases, when the glass article 100 breaks, fragments may be violently ejected and may be crushed from within the glass article 100. The maximum tensile stress that satisfies the brittleness criterion of the glass article 100 is not limited to, but can satisfy, the following relationship (2):

[0087] CT1≤-38.7×ln(t)+48.2(2).

[0088] In some embodiments, the maximum tensile stress CT1 can be 100 MPa or less, or 85 MPa or less. A maximum tensile stress CT1 of 75 MPa or greater can improve mechanical properties such as strength. In embodiments, the maximum tensile stress CT1 can be, but is not limited to, 75 MPa to 85 MPa.

[0089] The maximum tensile stress CT1 of the glass article 100 can typically be located in the central portion of the glass article 100 in the thickness t direction. For example, the maximum tensile stress CT1 of the glass article 100 can be located at a depth of 0.4t to 0.6t, 0.45t to 0.55t, or approximately 0.5t from the second surface RS.

[0090] High compressive stress and compression depths DOC1 and DOC2 can be advantageous in increasing the strength of the glass article 100. However, with increased compressive energy, tensile energy may also increase, thereby increasing the maximum tensile stress CT1. To ensure that the glass article 100 meets the brittleness criterion while possessing high strength, the stress distribution can be adjusted to increase the maximum compressive stresses CS1 and CS2 and the compression depths DOC1 and DOC2, while reducing the compressive energy. For this purpose, the glass article 100 can be manufactured using a glass composition comprising specific components in a predetermined ratio. Depending on the compositional ratio of the components included in the glass composition, the manufactured glass article 100 can possess excellent strength while simultaneously exhibiting the flexibility and physical properties suitable for foldable display devices.

[0091] According to an embodiment, the glass composition forming the glass article 100 may include a ternary glass composition, which, based on the total content of the glass composition, contains 45 mol% to 60 mol% SiO2, greater than 35 mol% and less than or equal to 45 mol% B2O3, and greater than or equal to 3 mol% and less than 9 mol% Na2O. Furthermore, the glass composition may include a quaternary glass composition, which further contains greater than 0 mol% and less than 8 mol% Al2O3. Additionally, the glass composition may include a pentacetic glass composition, which further contains greater than 0 mol% and less than or equal to 5 mol% K2O. In another embodiment, the B2O3 content may be 36 mol% to 45 mol%, and the Na2O content may be 3 mol% to 8 mol%. In yet another embodiment, the B2O3 content may be 37 mol% to 45 mol%, and the Na2O content may be 3 mol% to 7 mol%.

[0092] Each component of the glass composition will be described in more detail below.

[0093] SiO2 can be used to form the framework of glass, improve chemical durability (e.g., chemical resistance), and reduce the formation of cracks due to scratches (indentations) on the glass surface. SiO2 can form a network former oxide for the glass network, and glass articles 100 containing SiO2 can have a reduced coefficient of thermal expansion and improved mechanical strength. To fully achieve these effects, SiO2 can be contained in an amount of 45 mol% or greater. To exhibit sufficient fusibility, SiO2 can be contained in the glass composition in an amount of 60 mol% or less.

[0094] B₂O₃ can form glasses with a coordination number of 3, thereby reducing bond strength (i.e., viscosity). Therefore, the glass transition temperature and elastic modulus of the glass can be reduced, thus improving the folding and unfolding properties of the glass article 100. In other words, as the elastic modulus of the glass decreases, the stress applied to the lower portion of the glass article 100 during folding and unfolding also decreases, thereby improving the bending properties of the glass article 100. The glass transition temperature and elastic modulus can be reduced when B₂O₃ is contained in an amount greater than 35 mol%. B₂O₃ can be contained in an amount of 45 mol% or less to prevent a decrease in chemical durability.

[0095] Na₂O is used to create surface compressive stress and improve the fusibility of glass through ion exchange. Na₂O can form non-bridging oxygen in the SiO₂ network structure by forming ionic bonds with the oxygen bonds that form the network structure. The increase in non-bridging oxygen improves the flexibility of the network structure and gives the glass article 100 the physical properties that make it suitable for foldable display devices. A Na₂O content of 3 mol% or greater can promote ion exchange during the chemical tempering process, thereby creating surface compressive stress and improving the fusibility of the glass. A Na₂O content of less than 9 mol% can prevent an increase in the elastic modulus of the glass article 100.

[0096] As described above, the glass article 100 manufactured using the glass composition according to the embodiments can possess properties and physical properties that make it suitable for foldable display devices. For example, the glass article 100 can be flexible, allowing it to be folded and unfolded, and can have sufficient strength and chemical properties to make it suitable as a cover window for the display device 500. The network structure formed by the glass composition containing SiO2 and B2O3 can be transformed into a flexible network structure by the addition of Na2O. Due to the addition of Na2O, Na ions can form ionic bonds (e.g., bonds between SiO2) with oxygen bonds between the bonds forming the network structure, thereby increasing unbridged oxygen. The increase of unbridged oxygen within the network structure means that the bonds in the network structure are broken or opened, and the network structure of the glass can be flexible. The glass composition can contain Na2O in an amount greater than or equal to 3 mol% and less than 9 mol%, such that the manufactured glass article 100 can have sufficient flexibility.

[0097] Because the glass composition contains excessive B2O3, its chemical durability may be reduced. To compensate for this effect, the ratio of SiO2 to B2O3 content (SiO2 / B2O3) in the glass composition can be adjusted to 1 or greater, thereby preventing a decrease in chemical durability. For example, the SiO2 content in the glass composition can be greater than or equal to the B2O3 content. If the SiO2 to B2O3 ratio is 1 or greater, vitrification is possible, and a decrease in chemical durability can be prevented.

[0098] According to an embodiment, the difference between the B2O3 content and the Na2O content in the glass composition (B2O3-Na2O) can be 40 mol% or less. For example, the B2O3 content in the glass composition can be greater than the Na2O content, and the difference can be 40 mol% or less. If the difference between the B2O3 content and the Na2O content (B2O3-Na2O) is 40 mol% or less, it is possible to prevent a decrease in the chemical durability of the glass article 100.

[0099] The ternary glass composition according to the above embodiments can improve the folding and unfolding characteristics of the glass article 100 by reducing its elastic modulus while enabling the glass article 100 to possess the strength and flexibility required for a foldable display device. Furthermore, the content of each component can be adjusted to prevent a decrease in the chemical durability of the glass article. The above-described ternary glass composition may consist of only three components (e.g., SiO2, B2O3, and Na2O) and does not include other components.

[0100] Furthermore, the glass composition can be a quaternary glass composition also containing Al2O3. Al2O3 can be an intermediate oxide that forms bonds with SiO2 to form a network structure. Al2O3 can act as an active component that improves ion exchange properties during the chemical tempering process and increases surface compressive stress after tempering. In addition, Al2O3 can increase chemical durability and improve fusibility. When Al2O3 is contained in an amount greater than 0 mol% (e.g., greater than 1 mol%), Al2O3 can effectively perform the above functions. Furthermore, an Al2O3 content of less than 8 mol% can prevent an increase in the elastic modulus of the glass article 100.

[0101] According to an embodiment, the ratio of Na2O content to Al2O3 content (Na2O / Al2O3) in the glass composition can be greater than 1. For example, the Na2O content in the glass composition can be greater than the Al2O3 content. Na2O can improve the durability of the glass article 100 by causing the AlO6 structure of Al2O3 to form a tetrahedral structure of AlO4. Furthermore, the remaining Na2O can improve the chemical durability of the glass by causing the BO3 structure of B2O3 to form a tetrahedral structure of BO4. Therefore, when the ratio of Na2O content to Al2O3 content (Na2O / Al2O3) is greater than 1, the chemical durability of the glass article 100 can be improved.

[0102] Since the glass composition comprising a quaternary system according to the above embodiments also contains Al2O3, the chemical durability of the glass article 100 can be further improved in addition to the effects of the ternary system. The glass composition comprising a quaternary system described above may consist of only four components (e.g., SiO2, B2O3, Na2O, and Al2O3) and does not include other components.

[0103] According to an embodiment, the glass composition can be a pentaceous glass composition also containing K2O. K2O can increase the compressive stress of the glass by exchanging (e.g., replacing) Na ions with K ions during a chemical tempering process. Therefore, K2O can help achieve flexible glass articles 100 by improving the folding and bending reliability of the glass article 100. K2O and Na2O can increase the ion exchange rate during the chemical tempering process due to the mixed alkali effect. Therefore, the addition of K2O can reduce the chemical tempering process time. The above functions can be significantly performed when K2O is contained in an amount greater than 0 mol%. However, in order to prevent a decrease in the elastic modulus of the glass article 100, the K2O content can be 5 mol% or less.

[0104] According to an embodiment, the ratio of the sum of Na₂O and K₂O content in the glass composition to the Al₂O₃ content ((Na₂O + K₂O) / Al₂O₃) can be greater than 1. For example, the sum of Na₂O and K₂O content in the glass composition can be greater than the Al₂O₃ content. In addition to Na₂O, K₂O can improve the durability of the glass article 100 by causing the AlO₆ structure of Al₂O₃ to form a tetrahedral structure of AlO₄; the remaining K₂O can improve the chemical durability of the glass by causing the BO₃ structure of B₂O₃ to form a tetrahedral structure of BO₄. Therefore, when the ratio of the sum of Na₂O and K₂O content to the Al₂O₃ content ((Na₂O + K₂O) / Al₂O₃) is greater than 1, the chemical durability of the glass article 100 can be improved.

[0105] Since the glass composition comprising a pentagonal system according to the above embodiments also contains K2O, in addition to the effects of a quaternary system, it can reduce the chemical tempering process time of the glass article 100 and further increase the chemical durability of the glass article 100. The glass composition comprising a pentagonal system described above may consist of only five components (e.g., SiO2, B2O3, Na2O, Al2O3, and K2O) and may not include other components.

[0106] The glass composition having the above composition can be molded into the shape of a flat glass using various methods known in the art. Once molded into a flat glass shape, the glass composition can be further processed to produce a glass article 100 that can be applied to the display device 500. However, this disclosure is not limited thereto, and the glass composition may also be directly molded into the glass article 100 for application to the product without additional molding processes, instead of being molded into a flat glass shape.

[0107] Figure 7 This is a flowchart illustrating the operations in the process of manufacturing glass articles according to an embodiment. Figure 8 It is shown Figure 7A schematic diagram of a series of operations from cutting to surface polishing after tempering.

[0108] Reference Figure 7 and Figure 8 and combined Figure 5 The method of manufacturing glass article 100 may include molding operation (operation S1), cutting operation (operation S2), side polishing operation (operation S3), pre-tempering surface polishing operation (operation S4), tempering operation (operation S5), and post-tempering surface polishing operation (operation S6).

[0109] The molding operation (operation S1) may include preparing a glass composition and molding the glass composition. The glass composition may have the component ratios and components described above, which will not be described in detail here. The glass composition may be molded into the shape of a flat glass by methods such as float glass, fusion drawing, or slot drawing.

[0110] Glass molded into a flat shape can be cut by a cutting operation (operation S2). The glass molded into a flat shape can have dimensions different from those applied to the final glass article 100. For example, glass in a large-area substrate state can be molded as a mother glass 10a (mother glass 10a is a unit comprising a mother substrate including multiple glass articles 100), and then cut into multiple cells to produce multiple glass articles 100. For example, although the final glass article 100 has a size of approximately 6 inches, the glass can be molded to a size several to hundreds of times larger than the final glass article 100 (e.g., 120 inches), and then cut to produce 20 flat shapes at a time. This improves process efficiency compared to molding a single glass article 100 individually. Furthermore, even when molding glass corresponding to the size of a single glass article, if the final glass article 100 has various planar shapes, the desired shape can be formed by the cutting process.

[0111] The cutting of the mother glass 10a can be performed using a cutting blade 20, a cutting wheel, or a laser.

[0112] The glass cutting operation (operation S2) can be performed before the glass tempering operation (operation S5). The mother glass 10a can be tempered and then cut to the final glass article size. However, in this case, the cut surface of the glass (e.g., the side surface) may not be tempered. Therefore, it is desirable to perform the tempering operation (operation S5) after the cutting operation (operation S2) is completed.

[0113] A pre-tempering polishing operation can be performed between the glass cutting operation (operation S2) and the glass tempering operation (operation S5). The polishing operation may include a side polishing operation (operation S3) and a pre-tempering surface polishing operation (operation S4). In an embodiment, the side polishing operation (operation S3) may be performed before the pre-tempering surface polishing operation (operation S4), but this order can be reversed.

[0114] The side polishing operation (operation S3) is the operation of polishing the side surfaces of the glass unit 10 that have been cut from the mother glass 10a. In the side polishing operation (operation S3), the side surfaces of the glass unit 10 can be polished to become smooth. Furthermore, the side surfaces of the glass unit 10 can be made uniform through the side polishing operation (operation S3). More specifically, each glass unit 10 may include one or more cut surfaces. Some of the multiple glass units 10 may have two of the four side surfaces as cut surfaces. Other glass units 10 may have three of the four side surfaces as cut surfaces. Still other glass units 10 may have all four side surfaces as cut surfaces. The surface roughness may differ between the cut side surfaces and the uncut side surfaces. Even between cut surfaces, the surface roughness may differ. Therefore, each side surface can be polished to have a uniform surface roughness through the side polishing operation (operation S3). Furthermore, if there are small cracks on the side surfaces, the small cracks can also be removed through the side polishing operation (operation S3).

[0115] Side polishing operation (operation S3) can be performed on glass unit 10 simultaneously. That is, glass unit 10 can be polished simultaneously while stacked.

[0116] The side polishing operation (operation S3) can be performed by a mechanical polishing method or a chemical mechanical polishing method using the polishing apparatus 30. In an embodiment, two back-to-back side surfaces of each glass unit 10 can be polished simultaneously, and then another two back-to-back side surfaces can be polished simultaneously. However, this disclosure is not limited thereto.

[0117] A pre-tempering surface polishing operation (operation S4) can be performed to ensure that each glass unit 10 has a flat surface. The pre-tempering surface polishing operation (operation S4) can be performed on each glass unit 10 individually. However, if the chemical mechanical polishing apparatus 40 is large enough to be larger than the glass unit 10, the glass units 10 can be arranged horizontally, and then surface polishing can be performed simultaneously.

[0118] The pre-tempering surface polishing operation (operation S4) can be performed using a chemical mechanical polishing method. Specifically, the first and second surfaces of each glass unit 10 are polished using a chemical mechanical polishing apparatus 40 and a polishing slurry. The first and second surfaces can be polished simultaneously, or one surface can be polished first and then the other surface can be polished.

[0119] The tempering operation (operation S5) is performed after the pre-tempering polishing operation (operation S4). The tempering operation (operation S5) can be performed as chemical tempering and / or thermal tempering. When the thin glass unit 10 has a thickness of 2 mm or less (extended to approximately 0.75 mm or less), chemical tempering can be used for precise stress distribution control.

[0120] After the tempering operation (operation S5), a post-tempered surface polishing operation (operation S6) may optionally be performed. The post-tempered surface polishing operation (operation S6) can be used to remove microcracks in the surface of the tempered glass unit 10 and to control the compressive stress on the first and second surfaces of the tempered glass unit 10. For example, in a float glass manufacturing process, the glass composition is poured into a tin bath. In this case, the surface in contact with the tin bath and the surface not in contact with the tin bath may have different compositions. Therefore, after the tempering operation (operation S5) of the glass unit 10, a compressive stress difference may occur between the surface in contact with the tin bath and the surface not in contact with the tin bath. By removing the surface of each glass unit 10 to an appropriate thickness via polishing, the compressive stress difference between the surface in contact with the tin bath and the surface not in contact with the tin bath can be reduced.

[0121] The surface polishing operation after tempering (operation S6) can be performed using a chemical mechanical polishing method. Specifically, the first and second surfaces of the glass unit 10 (which is the processed glass unit 10) are polished using a chemical mechanical polishing apparatus 60 and a polishing slurry. The polishing thickness can be adjusted within the range of 100 nanometers (nm) to 1000 nanometers (nm), but is not limited to this range. The polishing thicknesses of the first and second surfaces can be the same or different.

[0122] Although not shown in the accompanying drawings, further shaping processes can be performed as needed after the tempered surface polishing operation (operation S6). For example, when manufacturing... Figure 1 When the 3D glass articles 101 to 103 shown are processed, the 3D processing technology can be performed after the tempered surface polishing operation (operation S6) is completed.

[0123] The glass article 100 manufactured by the above process may include a composition ratio similar to that of the glass composition. For example, the glass article 100 may include a ternary glass composition containing 45 mol% to 60 mol% SiO2, greater than 35 mol% and less than or equal to 45 mol% B2O3, and greater than or equal to 3 mol% and less than 9 mol% Na2O. Furthermore, the glass composition may include a quaternary glass composition containing greater than 0 mol% and less than 8 mol% Al2O3. Additionally, the glass composition may include a pentagonal glass composition containing greater than 0 mol% and less than or equal to 5 mol% K2O.

[0124] According to an embodiment, the glass article 100 manufactured from the above-described glass composition may have a thickness of 100 μm or less (preferably 50 μm to 100 μm) to improve surface integrity properties. Furthermore, the glass article 100 may have an elastic modulus of 30 GPa to 55 GPa.

[0125] The embodiments will be described in more detail below through experimental examples.

[0126] Experimental Example 1: Manufacturing of Ternary Glass Products

[0127] Glass compositions having a ternary composition ratio of SiO2, B2O3, and Na2O were prepared according to Table 1 below, and glass articles of samples #1 to #14 were then manufactured. The glass article of each sample was manufactured to have a thickness of 50 μm.

[0128] The composition and composition ratio, elastic modulus, vitrification behavior and chemical resistance of the glass articles for each sample were measured and are shown in Table 1 below.

[0129] Here, the elastic modulus is checked by preparing 10mm×20mm×3mm specimens for each glass composition and examining the stress and strain of the specimens using an elastic modulus tester.

[0130] The vitrification behavior is indicated as "O" when the prepared glass composition is completely melted at the corresponding melting temperature and when the prepared composition is made into a glass article with a light transmittance of 88% or higher. The designation M in parentheses is the melting temperature, and the designation A is the annealing temperature.

[0131] Chemical resistance is expressed by the relative light transmittance of the glass article when observed with the naked eye after it has been stored at room temperature and 80% humidity for more than 24 hours. Higher light transmittance indicates higher chemical resistance. "O" indicates the entire glass article is transparent, "△" indicates some parts are cloudy, "X" indicates the entire glass article is cloudy, "XX" indicates the glass article is more cloudy than X, and "XXX" indicates the glass article is more cloudy than XX.

[0132] [Table 1]

[0133]

[0134]

[0135] Referring to Table 1 above, it can be seen that samples #1 to #14 all exhibit vitrification behavior and therefore melt well and are manufactured into transparent glass products.

[0136] Samples #1 to #4 and samples #7 to #12 showed low chemical resistance, while the glass articles of samples #5, #6, #13 and #14 showed high chemical resistance and were completely transparent with a transmittance of 88% or higher.

[0137] In addition, the elastic moduli of samples #5, #6, #13 and #14 are 47.1 GPa, 51.2 GPa, 50.2 GPa and 52.7 GPa, respectively.

[0138] In addition, although not shown in Table 1, the glass articles of samples #5, #6, #13 and #14 were chemically tempered in a molten salt of 100% nitrate at 420°C for 2 hours, and the compressive stress and compression depth of samples #5, #6, #13 and #14 were then measured.

[0139] Samples #5 and #6 show compressive stress of 300 MPa or less and compression depth of 10 μm or less. Samples #13 and #14 show compressive stress of 200 MPa or less and compression depth of 10 μm or less.

[0140] As the results above show, glass articles made using a ternary glass composition containing SiO2, B2O3 and Na2O (in component ratio) according to the embodiments have an elastic modulus of 45 GPa to 55 GPa, are capable of vitrification behavior, have excellent chemical resistance, and are easy to chemically temper.

[0141] Experimental Example 2: Manufacturing of Quaternary Glass Products

[0142] Glass compositions having a quaternary composition ratio of SiO2, B2O3, Na2O, and Al2O3 were prepared according to Table 2 below, and glass articles of samples #15 to #26 were then manufactured. The glass articles of each sample were manufactured to have a thickness of 50 μm.

[0143] The composition and composition ratio, elastic modulus, vitrification behavior, density and chemical resistance of the glass articles for each sample were measured and are shown in Table 2 below.

[0144] [Table 2]

[0145]

[0146] Referring to Table 2 above, it can be seen that samples #15 to #26 all exhibit vitrification behavior and therefore melt well and are manufactured into transparent glass products.

[0147] Samples #15 and #23 to #25 showed low chemical resistance, however, the glass articles of samples #16 to #22 and #26 were completely transparent and had 88% or higher light transmittance.

[0148] The elastic moduli of samples #15, #16, #17, and #26 are 32.4 GPa, 34.2 GPa, 35.7 GPa, and 43.1 GPa, respectively. Although not shown in Table 2, the elastic moduli of samples #18 to #22 are in the range of 35 GPa to 60 GPa.

[0149] The densities of samples #15, #16, #17, and #26 are 2.06 g / cm³. 3 ), 2.08 grams per cubic centimeter (g / cm³) 3 ), 2.10 grams per cubic centimeter (g / cm³) 3 ) and 2.21 grams per cubic centimeter (g / cm³) 3 Although not shown in Table 2, the densities of samples #18 to #22 are 2.1 g / cm³. 3 Up to 2.4 g / cm 3 Within the range.

[0150] In addition, although not shown in Table 2, the glass articles of samples #16 to #22 and #26 were chemically tempered in a molten salt of 100% nitrate at 420°C for 2 hours, and the compressive stress and compression depth of samples #16 to #22 and #26 were then measured.

[0151] Samples #16 and #17 show compressive stress of 200 MPa or less and compression depth of 7 μm or less. Samples #18 to #22 show compressive stress of 500 MPa or less and compression depth of 10 μm or less. Sample #26 shows compressive stress of 300 MPa or less and compression depth of 10 μm or less.

[0152] As shown in the results above, glass articles manufactured using a quaternary glass composition containing SiO2, Al2O3, B2O3, and Na2O (in the compositional ratio according to the examples) have an elastic modulus of 30 GPa to 60 GPa and a modulus of 2 g / cm³. 3 Up to 2.4 g / cm 3 It has a density that enables it to exhibit glass transition behavior, provides excellent chemical resistance, and is easily chemically tempered.

[0153] Experimental Example 3: Manufacturing of Five-Element Glass Products

[0154] Glass compositions with a five-element composition ratio of SiO2, B2O3, Na2O, K2O, and Al2O3 were prepared according to Table 2 below, and glass articles of samples #27 and #28 were then manufactured. The glass articles of each sample were manufactured to have a thickness of 50 μm.

[0155] The composition and composition ratio, vitrification behavior, density and chemical resistance of the glass articles for each sample were measured and are shown in Table 3 below.

[0156] [Table 3]

[0157]

[0158] Referring to Table 3 above, it can be seen that both Sample #27 and Sample #28 exhibit vitrification behavior and therefore melt well and are manufactured into transparent glass products.

[0159] The glass products of samples #27 and #28 are completely transparent and have a light transmittance of 88% or higher.

[0160] Although not shown in Table 3, the elastic modulus of samples #27 and #28 is in the range of 40 GPa to 50 GPa.

[0161] In addition, although not shown in Table 3, the glass articles of samples #27 and #28 were chemically tempered in a molten salt of 100% nitrate at 420°C for 2 hours, and the compressive stress and compression depth of samples #27 and #28 were then measured.

[0162] Samples #27 and #28 show compressive stress of 300 MPa or less and compression depth of 10 μm or less.

[0163] As the results above show, glass articles made using a pentagonal glass composition containing SiO2, K2O, Al2O3, B2O3 and Na2O (in component ratio) according to the embodiments have an elastic modulus of 40 GPa to 50 GPa, are capable of vitrification behavior, have excellent chemical resistance, and are easy to chemically temper.

[0164] The glass composition according to the embodiments may contain components in novel compositional ratios, and the glass articles made from the glass composition may be flexible due to their low modulus and may have excellent chemical durability. Furthermore, the glass articles may have such excellent flexibility that they can be used in foldable display devices.

[0165] The display device according to one embodiment of the present disclosure can be applied to various electronic devices. The electronic device according to one embodiment of the present disclosure includes the aforementioned display device, and may also include modules or devices with additional functions besides the display device.

[0166] Figure 9 This is a block diagram of an electronic device 1 according to an embodiment of the present disclosure.

[0167] Reference Figure 9 An electronic device 1 according to an embodiment of the present disclosure may include a display module 11, a processor 12, a memory 13, and a power module 14.

[0168] The processor 12 may include at least one of a central processing unit (CPU), an application processor (AP), a graphics processing unit (GPU), a communication processor (CP), an image signal processor (ISP), and a controller.

[0169] The memory 13 can store data information necessary for the operation of the processor 12 or the display module 11. When the processor 12 executes the application stored in the memory 13, image data signals and / or input control signals are transmitted to the display module 11, and the display module 11 is able to process the received signals and output image information through the display screen.

[0170] The power module 14 may include a power supply module, such as a power adapter or a battery, and a power conversion module, which converts the power supplied by the power supply module to generate the power necessary for the operation of the electronic device 1.

[0171] At least one of a plurality of components of an electronic device 1 according to an embodiment of the present disclosure may be included in a display device 500 according to an embodiment of the present disclosure (see [link to relevant documentation]). Figure 4Furthermore, some modules that are functionally included in a single module may be included in the display device 500, and other modules may be provided separately from the display device 500. For example, the display device 500 may include a display module 11, and the processor 12, memory 13, and power module 14 may be provided as other devices within the electronic device 1 besides the display device 500.

[0172] Figure 10 This is a schematic diagram of an electronic device according to various embodiments of the present disclosure.

[0173] Reference Figure 10 The display device 500 according to an embodiment of the present disclosure (see also...) Figure 4 The various electronic devices to which this technology is applied can include not only image display electronic devices (such as smartphones 10_1a, tablet PCs 10_1b, laptops 10_1c, televisions (TVs) 10_1d, and desktop monitors 10_1e), but also wearable electronic devices containing display modules (such as smart glasses 10_2a, head-mounted displays 10_2b, and smartwatches 10_2c), and also vehicle electronic devices 10_3 containing display modules (such as CID (central information display) and rearview mirror displays arranged on the dashboard, central instrument panel, and dashboard of a car).

[0174] In summarizing the detailed description, those skilled in the art will understand that many variations and modifications can be made to the preferred embodiments without substantially departing from the principles of the invention. Therefore, the preferred embodiments disclosed herein are used only in a general and descriptive sense and are not intended to be limiting.

Claims

1. A glass article, wherein, As a glass composition, the glass article includes: Based on the total content of the glass products 45 mol% to 60 mol% SiO2; B2O3 greater than 35 mol% and less than or equal to 45 mol%; Greater than or equal to 3 mol% and less than 9 mol% of Na₂O; and Al2O3 with a content greater than 0 mol% and less than 8 mol%.

2. The glass article according to claim 1, wherein, The difference between the B2O3 content and the Na2O content is 40 mol% or less.

3. The glass article according to claim 1, wherein, The ratio of Na2O content to Al2O3 content is greater than 1.

4. The glass article according to claim 1, wherein, The glass article also includes K2O in an amount greater than 0 mol% and less than or equal to 5 mol%.

5. The glass article according to claim 1, wherein, The ratio of the sum of Na2O and K2O content to Al2O3 content is greater than 1.

6. The glass article according to claim 1, wherein, The thickness of the glass article is 50 μm to 100 μm.

7. The glass article according to claim 1, wherein, The elastic modulus of the glass product is between 30 GPa and 55 GPa.

8. A display device, wherein, The display device includes: The display panel includes multiple pixels; Cover window, located on the display panel; and An optically transparent bonding layer is located between the display panel and the cover window. The covering window, as a glass composition, comprises, based on the total content of the covering window, 45 mol% to 60 mol% of SiO2, greater than 35 mol% and less than or equal to 45 mol% of B2O3, greater than or equal to 3 mol% and less than 9 mol% of Na2O, and greater than 0 mol% and less than 8 mol% of Al2O3.

9. The display device according to claim 8, wherein, The difference between the B2O3 content and the Na2O content is 40 mol% or less.

10. The display device according to claim 8, wherein, The ratio of Na2O content to Al2O3 content is greater than 1.

11. The display device according to claim 8, wherein, The covering window also includes K2O in an amount greater than 0 mol% and less than or equal to 5 mol%.

12. The display device according to claim 11, wherein, The ratio of the sum of Na2O and K2O content to Al2O3 content is greater than 1.

13. The display device according to claim 8, wherein, The covering window has a thickness of 50 μm to 100 μm.

14. The display device according to claim 8, wherein, The covering window has an elastic modulus of 30 GPa to 55 GPa.

15. An electronic device, wherein, The electronic device includes: A display device, configured to provide an image; and The processor is configured to provide image data signals to the display device, and The display device includes: The display panel includes multiple pixels; Cover window, located on the display panel; and An optically transparent bonding layer is located between the display panel and the cover window. The covering window, as a glass composition, comprises, based on the total content of the covering window, 45 mol% to 60 mol% of SiO2, greater than 35 mol% and less than or equal to 45 mol% of B2O3, greater than or equal to 3 mol% and less than 9 mol% of Na2O, and greater than 0 mol% and less than 8 mol% of Al2O3.

16. The electronic device according to claim 15, wherein, The difference between the B2O3 content and the Na2O content is 40 mol% or less.

17. The electronic device according to claim 15, wherein, The ratio of Na2O content to Al2O3 content is greater than 1.

18. The electronic device according to claim 15, wherein, The covering window also includes K2O in an amount greater than 0 mol% and less than or equal to 5 mol%.

19. The electronic device according to claim 18, wherein, The ratio of the sum of Na2O and K2O content to Al2O3 content is greater than 1.

20. The electronic device according to claim 15, wherein, The covering window has a thickness of 50 μm to 100 μm.

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