Glass article, display device, method for manufacturing glass article, and method for manufacturing display device

Abstract

A glass article 10 according to the preset invention can obtain a desired shape while suppressing an increase in the weight of a frame and deformation of the frame at the time of assembly. The glass article 10 has a cover glass 12 and a frame 14 that is provided on a main surface 12B of the cover glass 12, and includes a curved part. If RB is the radius of curvature of the glass article 10, RH is the radius of curvature of the cover glass 12 in a state where the cover glass 12 is removed from the frame 14, and RF is the radius of curvature of the frame 14 in a state where the frame 14 is removed from the cover glass 12, the radius of curvature RF is less than 4,500 mm, the radius of curvature RH is less than 5,000 mm, and the curvature ratio BH, which is the ratio of the absolute value of the difference between the radius of curvature RB and the radius of curvature RH to the radius of curvature RB, is greater than 10% but not greater than 900%.

Description

Glass article, display device, method for manufacturing a glass article, and method for manufacturing a display device

[0001] The present invention relates to a glass article, a display device, a method for manufacturing a glass article, and a method for manufacturing a display device.

[0002] A known method for obtaining a curved glass article is to attach a cover glass to a frame. For example, Patent Document 1 describes a curved display device having a protective member as a cover glass, a frame, and a display panel. Also, a known method for curving the cover glass is cold bending, in which the cover glass is bent at room temperature and fixed to a frame.

[0003] Japanese Patent No. 6941930

[0004] A problem with such glass articles is that in order to obtain the desired shape while suppressing deformation of the glass when assembling the frame, the weight of the frame increases.

[0005] The present invention aims to provide a glass article, a display device, a method for manufacturing a glass article, and a method for manufacturing a display device that are capable of obtaining a desired shape while suppressing an increase in the weight of the frame and deformation of the frame during assembly.

[0006] A glass article according to the present disclosure is a glass article including a curved portion, having a cover glass and a frame provided on a main surface of the cover glass, wherein, when the radius of curvature of the glass article is RB, the radius of curvature of the cover glass when the cover glass is removed from the frame is RH, and the radius of curvature of the frame when the frame is removed from the cover glass is RF, the radius of curvature RF is less than 4500 mm, the radius of curvature RH is less than 5000 mm, and the ratio of the absolute value of the difference between the radius of curvature RB and the radius of curvature RH to the radius of curvature RB is greater than 10% and not greater than 900%.

[0007] A display device according to the present disclosure includes a display and the glass article provided on a surface of the display.

[0008] A method for manufacturing a glass article according to the present disclosure includes obtaining a heat-formed cover glass having a radius of curvature RH of less than 5000 mm, obtaining a frame having a radius of curvature RF of less than 4500 mm, and bonding a main surface of the cover glass to the frame to manufacture a glass article, wherein, when the radius of curvature of the glass article is RB, the ratio of the absolute value of the difference between the radius of curvature RB and the radius of curvature RH to the radius of curvature RB is greater than 10% and not greater than 900%.

[0009] The method for manufacturing a display device according to the present disclosure comprises attaching the glass article manufactured by the method for manufacturing a glass article to a display to manufacture a display device.

[0010] According to the present invention, it is possible to obtain a desired shape while suppressing an increase in the weight of the frame and deformation of the frame during assembly.

[0011] FIG. 1 is a schematic diagram showing a display device according to the present embodiment. FIG. 2 is a schematic diagram of a glass article according to the present embodiment. FIG. 3 is a top view of the glass article. FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3. FIG. 5A is a cross-sectional view of the glass article. FIG. 5B is a schematic diagram illustrating a curved portion of the glass article. FIG. 5C is a schematic diagram illustrating a curved portion of the glass article. FIG. 6 is a cross-sectional view of a cover glass. FIG. 7 is a cross-sectional view of a frame. FIG. 8 is a cross-sectional view showing an example in which the glass article is attached to a display. FIG. 9 is a schematic diagram illustrating a method for manufacturing a glass article 10 according to the present embodiment.

[0012] A glass article according to the present disclosure is a glass article including a curved portion, having a cover glass and a frame provided on a main surface of the cover glass, wherein, when the radius of curvature of the glass article is RB, the radius of curvature of the cover glass when the cover glass is removed from the frame is RH, and the radius of curvature of the frame when the frame is removed from the cover glass is RF, the radius of curvature RF is less than 4500 mm, the radius of curvature RH is less than 5000 mm, and the ratio of the absolute value of the difference between the radius of curvature RB and the radius of curvature RH to the radius of curvature RB is greater than 10% and not greater than 900%.

[0013] A display device according to the present disclosure includes a display and the glass article provided on a surface of the display.

[0014] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Note that the present invention is not limited to these embodiments, and when there are multiple embodiments, the present invention also includes configurations that are made by combining the respective embodiments. Furthermore, numerical values ​​include the range of rounding.

[0015] (Display Device) FIG. 1 is a schematic diagram showing a display device according to the present embodiment. As shown in FIG. 1, a glass article 10 according to the present embodiment is provided in a display device 2 and is used as a cover material for the surface (front) of a display 3 on which an image is displayed. In the present embodiment, the display device 2 is an in-vehicle display device provided in a vehicle, and is provided, for example, in front of a steering shaft 1 inside the vehicle. The display 3 displays, for example, a car navigation screen, various meters such as a speedometer, and a start button. However, the configuration in FIG. 1 is only an example, and the display device 2 to which the glass article 10 is applied may have any configuration. Furthermore, the glass article 10 is not limited to being used as a cover material for the surface of the display device 2, and may be used for any purpose.

[0016] (Glass Article) FIG. 2 is a schematic diagram of a glass article according to this embodiment, FIG. 3 is a top view of the glass article, and FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3. As shown in FIG. 2, the glass article 10 includes a cover glass 12, a frame 14, and an adhesive layer 16. The cover glass 12 is a transparent, plate-shaped glass member having a main surface 12A (first main surface) that is a main surface on one side, and a main surface 12B (second main surface) that is a main surface opposite to the main surface 12A. When the glass article 10 is mounted on a mounting object such as a display device 2, the main surface 12A is the side exposed to the outside, and the main surface 12B is the side facing the mounting object (here, the display 3). Note that "transparent" here refers to being transparent to visible light. Hereinafter, the thickness direction of the glass article 10 is referred to as the Z direction, one direction perpendicular to the Z direction (the left-right direction in the example of FIG. 1 ) is referred to as the X direction, and a direction perpendicular to the Z direction and the X direction (the up-down direction in the example of FIG. 1 ) is referred to as the Y direction. Note that the Z direction may be the thickness direction of the glass article 10 at a center point P of the surface of the glass article 10.

[0017] (Frame) The frame 14 is a frame-shaped member attached to the main surface 12B of the cover glass 12. The frame 14 is made of, for example, resin, metal, or fiber-reinforced plastic, but is not limited thereto and may be formed of any material. The frame 14 is curved. The frame 14 is attached to the peripheral portion of the main surface 12B of the cover glass 12. In the example of FIG. 2, the frame 14 is frame-shaped (frame-like) and extends along the entire circumferential portion of the main surface 12B of the cover glass 12. In addition, in the example of FIG. 2, the peripheral edge of the cover glass 12 does not protrude from the frame 14. However, this is not limited thereto and the peripheral edge of the cover glass 12 may protrude from the frame 14. The shape of the frame 14 and the attachment position of the frame 14 on the main surface 12B are not limited to the above description and may be arbitrary. For example, the frame 14 may be in the shape of a housing having a frame-shaped member and a member constituting a bottom surface covering the main surface 12B. Furthermore, for example, frame 14 may be provided in a shape that is interrupted in a partial section in the circumferential direction of the peripheral edge portion of main surface 12B. That is, for example, if main surface 12B has a curved rectangular shape, frame 14 may be provided on three of the four sides of the rectangle, on two opposing sides, or on one side.

[0018] (Young's modulus of the frame E Ｆ ) Young's modulus E of frame 14 Ｆ is preferably 1 GPa or more, more preferably 2 GPa or more, and even more preferably higher than 2 GPa. Ｆ The Young's modulus E of the frame 14 is preferably 500 GPa or less. Ｆ is preferably 1 GPa or more and 400 GPa or less, more preferably 2 GPa or more and 250 GPa or less, even more preferably 4 GPa or more and 80 GPa or less, and even more preferably 5 GPa or more and 60 GPa or less. ＦBy ensuring that Young's modulus E is within this range, the rigidity of the frame 14 can be ensured, and the desired shape can be obtained while suppressing deformation during assembly of the frame 14. Furthermore, by using an article having a Young's modulus within this range (500 GPa or less in this example), i.e., a resin frame, as the frame 14, it is possible to reduce the weight of the glass article 10. Note that the Young's modulus E of the frame 14 is Ｆ can be measured by the resonance method, mechanical testing method, ultrasonic pulse method, etc. The resonance method is a method in which vibration is applied to a test piece to measure the natural frequency, and Young's modulus is calculated from this natural frequency. The mechanical testing method is a method in which a load such as tension is applied to the test piece, and Young's modulus is calculated from the resulting deformation and load. The ultrasonic pulse method is a method in which an ultrasonic pulse is propagated through the test piece, and measurement is made from the propagation speed.

[0019] (frame second moment of area I Ｆ ) moment of inertia I of the frame 14 Ｆ is 0.5 mm ４ More than 3000mm ４ Preferably, it is 1 mm or less. ４ Over 450mm ４ More preferably, it is 1.5 mm or less. ４ More than 100 mm ４ It is more preferable that the second moment of area I Ｆ By ensuring that the range is within this range, the rigidity of the frame 14 is ensured without significantly impairing the design, and the desired shape can be obtained while suppressing deformation of the frame 14 during assembly. The second moment of area is relative to the bending axis. In the example of FIG. 3, the bending axis is the Y axis, and FIG. 4 shows a cross-sectional view of the glass article 10 at the A-A cross section (plane perpendicular to the X axis) shown in FIG. 3. In this case, the second moment of area I of the frame 14 is Ｆ As shown in Figure 4, in the AA cross section (plane perpendicular to the X axis), t Ｆ ２ (The thickness of the frame 14 is t Ｆ The squared value of the area moment of inertia (I) of the frame 14 is integrated by the area F of the frame 14 in a plane perpendicular to the X axis. Ｆis the length along the main surface of the frame 14 in the direction perpendicular to the bending axis (here, the X direction), and L is the length along the main surface of the frame 14 in the direction perpendicular to the bending axis (here, the X direction). Ｆ In this embodiment, the average value of the second moment of area for each position in the direction along the bending axis of the frame 14 is calculated as the second moment of area I Ｆ When calculating the average value of the moment of inertia for each position in the direction along the bending axis, the distance between positions and the number of positions used to calculate the average value may be arbitrary.

[0020]

[0021] (Specific Gravity of Frame) The specific gravity of the frame 14 is 0.5 g / cm ３ 9.0g / cm or more ３ Preferably, 0.8 g / cm or less ３ 8.0g / cm or more ３ More preferably, 1.0 g / cm or less ３ 4.0g / cm or more ３ More preferably, 1.2 g / cm ３ 2.0g / cm or more ３ The following is even more preferable. By setting the specific gravity within this range, it is possible to suppress an increase in the weight of the frame 14. The specific gravity can be measured by Archimedes' method.

[0022] (Adhesive Layer) The frame 14 is fixed (bonded) to the main surface 12B of the cover glass 12 via an adhesive layer 16. The adhesive layer 16 is provided between the frame 14 and the main surface 12B of the cover glass 12, and bonds the surface of the frame 14 facing the cover glass 12 to the main surface 12B of the cover glass 12. The adhesive layer 16 may be composed of any adhesive material capable of bonding the frame 14 and the cover glass 12 together, such as double-sided tape or adhesive.

[0023] Elastic modulus E of adhesive layer 16 ＡThe modulus of elasticity is preferably 0.2 MPa or more and 100 MPa or less, more preferably 1 MPa or more and 50 MPa or less, and even more preferably 5 MPa or more and 35 MPa or less. When the modulus of elasticity is within this range, the cover glass 12 can be properly bonded to the frame 14, and the shape of the cover glass 12 can be properly conformed to the shape of the frame 14, thereby properly obtaining the desired shape.

[0024] The elastic modulus E of the adhesive layer 16 Ａ The modulus of elasticity can be measured by the following indentation modulus test. The adhesive layer 16 bonded to the main surface 12B of the cover glass 12 is exposed facing vertically upward and placed in a creep meter (e.g., Yamaden Model No. RE2-33005C). A plunger (Yamaden Cylindrical Plunger Model No. P-61, φ1.5, H40) is pressed into the adhesive layer 16 at a rate of 0.05 mm / sec at room temperature (e.g., 20°C) until the plunger reaches a depth of 5% to 10% of the thickness of the adhesive layer 16. The load acting on the plunger and the displacement of the plunger in the pressing direction are measured sequentially. The load and displacement are plotted over time, and the slope of the approximation line between the plotted points is calculated as the modulus of elasticity of the adhesive layer 16. Note that this indentation modulus test is a parameter indicating adhesive strength. Although a cross adhesive strength test is known as an existing adhesive strength test, this method has been difficult to use depending on the state of the glass article. The indentation elastic modulus test can be used to verify glass articles in which the cover glass and frame are bonded, and it correlates with the adhesive strength observed in existing adhesive strength tests.

[0025] (Cover Glass) The cover glass 12 is attached to the frame 14 while being curved. In this embodiment, the cover glass 12 is curved by heat forming. The cover glass 12 is formed by bending a flat glass plate using a heat forming method (hot forming method), and the bent cover glass 12 is further bent without being heated (by cold forming method) and attached to the frame 14. In other words, the cover glass 12 bent by heat forming is attached to the frame 14 in a state where bending stress is applied due to bending accompanied by elastic deformation caused by an external force. Note that heat forming here refers to a method of bending glass by raising the temperature to above the glass transition point. Furthermore, cold forming refers to a method of bending glass by raising the temperature below the glass transition point.

[0026] In the example shown in FIG. 3 , the cover glass 12 is a curved rectangular flat glass plate. Hereinafter, one side (end face) of the cover glass 12 is referred to as side face 12C1, the side opposite side face 12C1 is referred to as side face 12C2, the other side face of the cover glass 12 is referred to as side face 12C3, and the side face opposite side face 12C3 is referred to as side face 12C4. In the example shown in FIG. 3 , side faces 12C1 and 12C2 are the short sides of the rectangle, and side faces 12C3 and 12C4 are the long sides of the rectangle. Note that the cover glass 12 is not limited to a curved rectangular flat glass plate, and may be a curved glass plate of any shape. For example, the cover glass 12 may be a curved polygonal, circular, or elliptical flat glass plate.

[0027] (Young's modulus of cover glass E Ｈ ) Young's modulus E of the cover glass 12 Ｈ is preferably 60 GPa or more and 90 GPa or less, more preferably 68 GPa or more and 78 GPa or less, and even more preferably 72 GPa or more and 76 GPa or less. Ｈ The cover glass 12 having such a relatively high Young's modulus E can be bent into a desired shape. Ｈcan be measured by the resonance method, mechanical testing method, ultrasonic pulse method, etc. The resonance method is a method in which a test piece is vibrated to measure its natural frequency, and Young's modulus is calculated from this natural frequency. The mechanical testing method is a method in which a load such as tension is applied to the test piece, and Young's modulus is calculated from the resulting deformation and load. The ultrasonic pulse method is a method in which an ultrasonic pulse is propagated through the test piece, and measurement is made from the propagation speed. It is generally known that the Young's modulus of glass follows the additivity law, and it can also be calculated by multiple regression from the Young's moduli of multiple glass compositions.

[0028] (Cover glass thickness t Ｈ ) Thickness t of the cover glass 12 Ｈ is preferably greater than 0.7 mm, more preferably 1.0 mm or more and 2.1 mm or less, and even more preferably 1.1 mm or more and 1.4 mm or less. Ｈ Even if the cover glass 12 has such a relatively high thickness, it is possible to bend it into a desired shape while suppressing the weight of the frame.

[0029] The glass material for the cover glass 12 is not particularly limited, but examples thereof include alkali-free glass, soda-lime glass, soda-lime silicate glass, aluminosilicate glass, borosilicate glass, lithium aluminosilicate glass, and borosilicate glass. The cover glass 12 is preferably chemically strengthened, i.e., preferably has a compressive stress layer on its surface. Therefore, the cover glass 12 is preferably made of aluminosilicate glass or lithium aluminosilicate glass, which can easily undergo a strengthening treatment even when thin, resulting in high strength despite its thinness. Chemical strengthening is typically performed by immersing the glass in a molten salt containing an alkali metal.

[0030] The cover glass 12 contains, in mole percent on an oxide basis, SiO ２ 50 to 80%, Al ２ O ３ 0.1 to 25%, Li ２ O + Na ２ O+K ２O 3 to 30%, MgO 0 to 25%, CaO 0 to 25% and ZrO ２ It is preferable that the content of Li is 0 to 5%, but there is no particular limitation. Note that 50% to 80% here means that the content is 50% or more and 80% or less when the total mole percentage of the cover glass 12 is 100%, and the same applies to other numerical ranges. ２ O + Na ２ O+K ２ O is Li ２ O and Na ２ O and K ２ It refers to the total content of SiO and O. By making the cover glass 12 have the following composition, it is possible to maintain appropriate rigidity even when the cover glass 12 is bent. Note that a numerical range expressed as "to" means a numerical range that includes the numerical values ​​before and after "to" as the lower and upper limits, and the same meaning will be used hereinafter when "to" is used.

[0031] More specifically, the following glass compositions are preferred for the glass for the cover glass 12. For example, "containing 0 to 25% MgO" means that MgO is not essential but may be contained up to 25%. Glass (i) is included in soda lime silicate glass, glasses (ii) and (iii) are included in aluminosilicate glass, and glasses (iv), (v), and (vi) are included in lithium aluminosilicate glass. (i) Composition expressed in mol %, SiO ２ 63 to 73%, Al ２ O ３ 0.1 to 5.2%, Na ２ O 10-16%, K ２ 0 to 1.5% O, Li ２ (ii) A glass containing 0 to 5.0% of O, 5 to 18% of MgO, and 1 to 10% of CaO, the composition of which, expressed in mole percent, is: SiO ２ 50 to 74%, Al ２ O ３ 5 to 15%, Na ２ O 10-20%, K ２ O 0 to 8%, Li ２ O 0 to 5.0%, MgO 2 to 15%, CaO 0 to 6% and ZrO ２ Contains 0 to 5% of SiO２ and Al ２ O ３ The total content of 65-85%, Na ２ O and K ２ (iii) A glass having a composition expressed in mol % of SiO ２ 68 to 80%, Al ２ O ３ 4-10%, Na ２ O 5-15%, K ２ O 0-1%, Li ２ O 0 to 5.0%, MgO 4 to 15% and ZrO ２ (iv) A glass containing 0 to 1% of SiO ２ 67 to 75%, Al ２ O ３ 0-4%, Na ２ O 7-15%, K ２ O 1 to 9%, Li ２ O 0 to 5.0%, MgO 6 to 14% and ZrO ２ Contains 0 to 1.5% of SiO ２ and Al ２ O ３ The total content of 71-75%, Na ２ O and K ２ (v) A glass having a composition expressed in mol % of SiO. ２ 50 to 73%, Al ２ O ３ 5 to 20%, B ２ O ３ 0 to 6%, P ２ O ５ 0 to 10%, Li ２ 4-12% O, Na ２ O 3-20%, K ２ O 0-5%, MgO 0-8%, CaO 0-2%, SrO 0-5%, BaO 0-5%, ZnO 0-5%, TiO ２ 0 to 2%, ZrO ２ (vi) A glass containing 0 to 4% of SiO ２58 to 80%, Al ２ O ３ 13-18%, B ２ O ３ 0 to 5%, P ２ O ５ 0.5-4%, Li ２ 3-10% O, Na ２ O 5-20%, K ２ O 0-2%, MgO 0-11%, CaO 0-20%, SrO 0-20%, BaO 0-15%, ZnO 0-10%, TiO ２ 0 to 1%, ZrO ２ Glass containing 0 to 2% of

[0032] (Bending of Glass Article) FIG. 5A is a cross-sectional view of a glass article, FIGS. 5B and 5C are schematic diagrams illustrating a curved portion of the glass article, FIG. 6 is a cross-sectional view of a cover glass, and FIG. 7 is a cross-sectional view of a frame. FIG. 5A is a cross-sectional view taken along line B-B of FIG. 3; that is, FIGS. 5A, 6, and 7 are views showing a cross section B-B perpendicular to the Y axis. As shown in FIG. 5A, the glass article 10 according to this embodiment is curved. The curved portion can also be referred to as a curved portion; in other words, the glass article 10 has a curved portion. A curved portion refers to a region of the glass article 10 that is bent with the same radius of curvature in the Y direction as the bending axis. In the example of FIG. 5A, the entire glass article 10 is bent with the same radius of curvature in the X direction as the bending axis, with the Y axis as the bending axis, so it can be said that the entire glass article 10 is a curved portion. However, the bending axis of the curved portion is not limited to the Y axis and may be along any direction. In this embodiment, the glass article 10 is curved so as to be convex toward the main surface 12A, but is not limited thereto and may be curved so as to be convex toward the main surface 12B. In this embodiment, "curved" refers to a curvature radius of 10,000 mm or less, and a curvature radius of more than 10,000 mm is treated as not curved but flat.

[0033] In this embodiment, the glass article 20 has one curved portion, but is not limited thereto and may have multiple curved portions with different radii of curvature. The bending axes of these multiple curved portions may be parallel or intersect. Furthermore, when the glass article 20 has multiple curved portions with different radii of curvature, the frame 14 preferably has multiple curved portions with different radii of curvature, similar to the glass article 20, when removed from the cover glass 12 (described in detail below). The cover glass 12 preferably has a single curved portion when removed from the frame 14 (described in detail below). That is, in this case, when attached to the frame 14, the cover glass 12 has a shape with multiple curved portions that follows the shape of the frame 14. In this way, by having only one curved portion on the cover glass 12 and attaching it to frames 14 of various shapes, mass productivity can be improved and costs can be reduced. Note that the term "same radius of curvature" does not necessarily mean that the radius of curvature at each position is strictly the same. For example, if the change in the measured radius of curvature R at each position from one end point to the other end point in the X direction in a region on the main surface 12B of the cover glass 12 that is bent with the Y direction as the bending axis is 5% or less, that is, if the difference between the maximum and minimum values ​​of the radius of curvature measured at each position in a certain section is 5% or less of the maximum value, the region is considered to be a region with the same radius of curvature and is treated as a single curved portion. In this case, the average value of the radii of curvature measured at each position in the curved portion may be treated as the radius of curvature of the curved portion.

[0034] (Example of a Case Where the Curved Portion is Spline-Shaped) In the above description, a portion bent with the same radius of curvature was described as a single curved portion. However, there are also cases where the portion is bent along a spline curve with an inconstant radius of curvature. In such cases, the entire portion bent along a spline curve is treated as a single curved portion. If the change in the radius of curvature at each position in a section from one end point to the other end point in the X direction of a region on the main surface 12B bent around the Y direction as the bending axis is greater than 5%, and the length of the section is 50 mm or less, the region is considered to be spline-shaped and treated as a single curved portion. The spline-shaped curved portion is then approximated to a shape bent with a constant radius of curvature, and the radius of curvature obtained when the shape is approximated to a shape bent with a constant radius of curvature is treated as the radius of curvature of the curved portion. Specifically, as shown in Fig. 5B , a plane connecting one end point 20J and the other end point 20K in the X direction of the main surface 12B of the spline-shaped curved portion and extending along the X and Y directions (i.e., an XY plane passing through one end point 20J and the other end point 20K) is defined as plane α. If a plane obtained by translating plane α in the Z direction so as to be tangent to the main surface 12B is defined as plane β, the radius of curvature of an arc 20R that passes through one end point 20J and the other end point 20K and is tangent to plane β is defined as the radius of curvature of the spline-shaped curved portion. For ease of explanation, Fig. 5B shows the glass article 20 as a single plate.

[0035] (Example of Multiple Curved Portions) As described above, the glass article 20 may have multiple curved portions. In other words, the glass article 20 may have multiple curved portions with different radii of curvature. In this case, each curved portion is bent around the same bending axis, that is, the Y direction. Whether there are multiple curved portions can be determined as follows. That is, if the change in the radius of curvature obtained by measuring each position in a section from one end point to the other end point in the X direction of a region on the main surface 12B that is bent around the Y direction as a bending axis is greater than 5%, and if the section is longer than 50 mm, then the region is determined to have multiple curved portions with different radii of curvature. That is, if the change in the radius of curvature R in a section of the principal surface 12B that is bent about the Y direction as a bending axis is 5% or less in a section of 50 mm or less from one end point to the other end point in the X direction, but the change in the radius of curvature R in a section longer than 50 mm from one end point to the other end point is 5% or more, it is determined that the spline-shaped curved section does not have a single curved section. In this case, as shown in the example of FIG. 5C , a region of the region that is bent about the Y direction as a bending axis on the principal surface 12B, where the change in the radius of curvature at each position in the section from one end point 20L to the other end point 20M in the X direction is 5% or less, is determined to be a single curved section 20A (curved section with radius of curvature Ra) with the same radius of curvature. The curved section 20A is the region from one end point 20L to a position 20N where the change in the radius of curvature R is greater than 5%. The region from position 20N toward the other end point 20M where the change in radius of curvature is 5% or less is defined as another curved portion 20B (a curved portion with a radius of curvature Rb). In the example of FIG. 5C , since the change in radius of curvature is 5% or less in the region from position 20N to end point 20M, the region from position 20N to end point 20M is treated as curved portion 20B. However, for example, if there is a position between position 20N and end point 20M where the change in radius of curvature R is greater than 5%, the region from position 20N to the position where the change in radius of curvature R is greater than 5% is defined as one curved portion 20B. In this case, three or more curved portions 20 exist.In the example of Fig. 5C, both curved portions 20A and 20B are convex toward the main surface 12A, but this is not limited thereto, and both curved portions 20A and 20B may be convex toward the main surface 12B. In other words, when there are multiple curved portions, each curved portion is convex toward the same direction. Note that the number of curved portions is not limited to two, and may be three or more.

[0036] If there is a flat portion (a region with a curvature radius greater than 10,000 mm) between curved portions, those curved portions are treated as different curved portions.

[0037] In the above description of the curved portion, the glass article 20 is described in a state in which the frame 14 is attached to the cover glass 12, but the above description of the curved portion can also be applied to the cover glass 12 alone and the frame 14 alone.

[0038] (Radius of Curvature) As shown in FIG. 5A , the radius of curvature of the glass article 10 is referred to as the radius of curvature RB. The radius of curvature RB refers to a value measured using a radius gauge, a three-dimensional measuring device, a projector, or the like. Any of the measuring instruments may be used for measurement, but an instrument that is easy to measure may be selected depending on the shape of the object. When the glass article 10 has one curved portion, the radius of curvature RB refers to the radius of curvature of that curved portion. When the glass article 10 has multiple curved portions, the radius of curvature of the curved portion with the smallest radius of curvature among the multiple curved portions is referred to as the radius of curvature RB. As shown in FIG. 6 , the radius of curvature of the cover glass 12 when the cover glass 12 is removed from the frame 14 is referred to as the radius of curvature RH. The state in which the cover glass 12 is removed from the frame 14 refers to a state in which the cover glass 12 constituting the glass article 10 is removed from the frame 14 constituting the glass article 10 at room temperature of 20°C to 25°C. The radius of curvature RH refers to a value measured using a radius gauge, a three-dimensional measuring machine, a projector, or the like. When the cover glass 12 has one curved portion, the radius of curvature RH refers to the radius of curvature of that curved portion. When the cover glass 12 has multiple curved portions, the radius of curvature RH refers to the radius of curvature of the curved portion with the smallest radius of curvature among the multiple curved portions. As shown in FIG. 7 , the radius of curvature RF of the frame 14 when the frame 14 is detached from the cover glass 12 refers to a state in which the frame 14 constituting the glass article 10 has been removed from the cover glass 12 constituting the glass article 10 by, for example, scraping off the adhesive layer 16 with a thin metal piece, under conditions that do not cause plastic deformation of the frame 14 during removal. The radius of curvature RF refers to a value measured using a radius gauge, a three-dimensional measuring machine, a projector, or the like. When the frame 14 has one curved portion, the radius of curvature RF refers to the radius of curvature of that curved portion. When the frame 14 has multiple curved portions, the radius of curvature RF refers to the radius of curvature of the curved portion having the smallest radius of curvature among the multiple curved portions.

[0039] (Relationship Between Radii of Curvature) As a result of extensive research, the present inventors have found that by appropriately setting the relationships between the radii of curvature RB, RH, RF, etc., it is possible to obtain a desired shape while suppressing an increase in the weight of the frame and deformation during assembly. The relationships between the radii of curvature will be described below.

[0040] The curvature ratio BH is the ratio (100 × |RB - RH| / RB) [%] of the absolute value of the difference between the radius of curvature RB (mm) of the glass article 10 and the radius of curvature RH (mm) of the cover glass 12 to the radius of curvature RB (mm) of the glass article 10. In this case, the curvature ratio BH is greater than 10% and less than or equal to 900%, preferably 20% to 400%, and more preferably 40% to 200%. When the lower limit of the curvature ratio BH falls within this range, the cover glass 12 can be sufficiently bent during assembly, allowing the desired shape to be realized. When the upper limit of the curvature ratio BH falls within this range, there is no need to excessively bend the cover glass 12 during assembly, allowing the desired shape to be realized while suppressing an increase in the weight of the frame 14 required to ensure rigidity. Furthermore, by setting the upper limit of the curvature ratio BH to this value, excessive bending of the cover glass 12 during assembly can be prevented, and the desired shape can be achieved without significantly deforming the frame 14 during assembly.

[0041] The curvature ratio BF is defined as the ratio (100×|RF-RB| / RB) [%] of the absolute value of the difference between the radius of curvature RB (mm) of the glass article 10 and the radius of curvature RF (mm) of the frame 14 to the radius of curvature RB (mm) of the glass article 10. In this case, the curvature ratio BF is preferably 0.5% or more and 30% or less, more preferably 1.0% or more and 20% or less, and even more preferably 3% or more and 18% or less. By setting the lower limit of the curvature ratio BF to this value, it is possible to suppress an increase in the weight of the frame 14, and by setting the upper limit of the curvature ratio BH to this value, it is possible to manufacture a desired shape with high precision.

[0042] Furthermore, it is preferable that the radius of curvature RH (mm) of the cover glass 12 is larger than the radius of curvature RB (mm) of the glass article 10, and that the radius of curvature RB (mm) of the glass article 10 is larger than the radius of curvature RF (mm) of the frame 14. In other words, it is preferable that RH > RB > RF be satisfied. This makes it possible to further curve the cover glass 12, which has already been curved to some extent by heat forming, so that it follows the shape of the frame 14, thereby appropriately achieving the desired shape.

[0043] Furthermore, the absolute value of the difference between the radius of curvature RB (mm) of the glass article 10 and the radius of curvature RH (mm) of the cover glass 12 is preferably greater than the absolute value of the difference between the radius of curvature RB (mm) of the glass article 10 and the radius of curvature RF (mm) of the frame 14. That is, it is preferable to satisfy |RH - RB| > |RB - RF|. This prevents excessive deformation of the frame 14 during assembly, allowing the desired shape to be appropriately achieved. Note that the ratio of the difference between the radius of curvature RB (mm) of the glass article 10 and the radius of curvature RH (mm) of the cover glass 12 to the absolute value of the difference between the radius of curvature RB (mm) of the glass article 10 and the radius of curvature RF (mm) of the frame 14 (100 × |RH - RB| / |RB - RF|) is preferably 100% or more and 9000% or less, more preferably 200% or more and 7000% or less, and even more preferably 300% or more and 3000% or less. By setting the difference ratio within this range, it is possible to prevent the frame 14 from being deformed excessively during assembly, and to appropriately achieve the desired shape.

[0044] (Radius of curvature of glass article) The radius of curvature RB of the glass article 10 is preferably 50 mm or more and 4500 mm or less, more preferably 100 mm or more and 3000 mm or less, and even more preferably 200 mm or more and 2000 mm or less. This allows the desired shape to be appropriately realized.

[0045] (Cover Glass Curvature Radius) The cover glass 12 has a curvature radius RH of less than 5,000 mm, preferably 80 mm to 4,500 mm, more preferably 100 mm to 3,500 mm, and even more preferably 150 mm to 2,500 mm. By bending the cover glass 12 before assembly within this range, a desired shape can be appropriately achieved. Furthermore, by bending the cover glass 12 before assembly within this range, further curving during assembly allows it to be attached to frames 14 of various shapes, thereby increasing versatility. Because the cover glass 12 is heat-formed, it is curved with this curvature radius RH even when removed from the frame 14 and not elastically deformed.

[0046] (Frame Curvature Radius) The frame 14 has a curvature radius RF of less than 4500 mm, preferably 45 mm to 4000 mm, more preferably 90 mm to 2700 mm, and even more preferably 180 mm to 1800 mm. By setting the curvature radius RF of the frame 14 within this range, a desired shape can be appropriately achieved.

[0047] In the glass article 10 according to this embodiment, it is preferable that the radius of curvature RF of the frame 14 is 45 mm or more and 4000 mm or less, the radius of curvature RH of the cover glass 12 is 80 mm or more and 4500 mm or less, and the radius of curvature RB of the glass article 10 is 50 mm or more and 4500 mm or less.

[0048] (Display device) Fig. 8 is a cross-sectional view showing an example in which the glass article is attached to a display. The glass article 10 according to this embodiment may be attached to a display 3 to form a display device 2. In this case, as shown in Fig. 8, the display 3 is attached to the main surface 12B of the cover glass 12 so as to be surrounded by the frame 14 and the adhesive layer 16. When the display 3 is attached to the cover glass 12 in this manner, the radius of curvature RH (mm) of the cover glass 12 may refer to the radius of curvature of the cover glass 12 in a state in which it is removed from the frame 14 and the display 3 remains attached.

[0049] A method for manufacturing a glass article according to the present disclosure includes: obtaining a heat-formed cover glass having a radius of curvature RH of less than 5000 mm; obtaining a frame having a radius of curvature RF of less than 4500 mm; and bonding a main surface of the cover glass to the frame to manufacture a glass article, wherein, when the radius of curvature of the glass article is RB, the ratio of the absolute value of the difference between the radius of curvature RB and the radius of curvature RH to the radius of curvature RB is greater than 10% and less than or equal to 900%. Furthermore, a method for manufacturing a glass article according to the present disclosure preferably includes: obtaining a plurality of cover glasses having the same radius of curvature; obtaining a plurality of frames having different shapes and / or rigidities; and manufacturing the glass article by bonding one of the different frames to each of the cover glasses to manufacture a plurality of glass articles. It is preferable that the radii of curvature RF of the plurality of frames are different from each other.

[0050] Furthermore, the method for manufacturing a display device according to the present disclosure comprises attaching the glass article manufactured by the above-described method for manufacturing a glass article to a display to manufacture a display device.

[0051] (Method for Manufacturing Glass Article and Display Device) Next, a method for manufacturing the glass article 10 will be described. FIG. 9 is a schematic diagram illustrating a method for manufacturing the glass article 10 according to this embodiment. As shown in FIG. 9 , in this manufacturing method, a flat glass plate, i.e., a cover glass 12, is heated and curved (thermally formed) to form the cover glass 12 including a curved portion (step S10). The cover glass 12 at the stage of step S10, i.e., the cover glass 12 in a state not attached to the frame 14, is curved to have the above-mentioned radius of curvature RH. Note that step S10 may be performed to obtain a curved cover glass 12 that has already been heat-formed without performing a process of heat-forming the flat glass plate. In other words, step S10 can be considered a step for obtaining a heat-formed cover glass 12 having the above-mentioned radius of curvature RH. Next, the main surface 12B of the cover glass 12 is bonded to the frame 14 including the curved portion via an adhesive layer 16 (step S12), thereby obtaining the glass article 10 (step S14). The frame 14 at step S12, i.e., the frame 14 when not attached to the cover glass 12, is curved to have the above-mentioned radius of curvature RF. The glass article 10 at step S14 is curved to have the above-mentioned radius of curvature RB. Furthermore, in this embodiment, the curved portion of the cover glass 12 curved by heat forming is further curved by bonding it to the frame 14. That is, in this embodiment, the area curved by heat forming and the area curved by attachment to the frame 14 (the area curved by cold forming) overlap. When manufacturing the display device 2, the display 3 is attached to the main surface 12B of the cover glass 12, which has the radius of curvature RH, and then the frame 14 is bonded to the main surface 12B in steps S12 and S14. Note that in the example of FIG. 9, the main surface 12B to which the frame 14 is attached is concave, and the main surface 12A exposed to the outside is convex. However, this is not limited thereto; the main surface 12B may be convex and the main surface 12A may be concave.

[0052] In this manufacturing method, it is preferable to chemically strengthen the cover glass 12 after step S10. More specifically, it is preferable to chemically strengthen the heat-formed cover glass 12 after step S10, and then perform step S12 to attach the frame 14 to the chemically strengthened cover glass 12.

[0053] In addition, in this manufacturing method, it is preferable to obtain multiple cover glasses 12 with the same radius of curvature RH in step S10, obtain multiple frames 14 of different types in step S12, and then adhere one of the different types of frames 14 to each of the cover glasses 12 with the same radius of curvature RH in step S14 to manufacture multiple glass articles 10. That is, in this manufacturing method, multiple cover glasses 12 with the same radius of curvature are prepared in advance, and the glass articles 10 are manufactured by attaching each of the cover glasses 12 to different types of frames 14. According to this manufacturing method, for example, cover glasses 12 of the same shape can be attached to various frames, thereby increasing the mass productivity of the cover glasses 12 and reducing costs. Note that, here, "different types of frames 14" refers to frames having different shapes and / or rigidities, and "different shapes" refers to frames having different radii of curvature RF, for example.

[0054] (Effects) As described above, the glass article 10 according to the first aspect of the present disclosure has a cover glass 12 and a frame 14 provided on the main surface 12B of the cover glass 12, and includes a curved portion. When the radius of curvature of the glass article 10 is RB, the radius of curvature of the cover glass 12 when the cover glass 12 is removed from the frame 14 is RH, and the radius of curvature of the frame 14 when the frame 14 is removed from the cover glass 12 is RF, the radius of curvature RF is less than 4500 mm, the radius of curvature RH is less than 5000 mm, and the curvature ratio BH, which is the ratio of the absolute value of the difference between the radius of curvature RB and the radius of curvature RH to the radius of curvature RB, is greater than 10% and equal to or less than 900%. According to the present disclosure, a desired shape can be achieved without significantly deforming the frame 14 during assembly while suppressing an increase in the weight of the frame 14. For example, by setting the curvature ratio BH within an appropriate range, it is possible to obtain a glass article 10 with a similar radius of curvature even if the weight of the frame is reduced, or even if a frame with a similar radius of curvature is used, it is possible to achieve a smaller radius of curvature for the glass article 10, thereby suppressing excessive deformation of the frame during assembly and realizing the desired shape.

[0055] The glass article 10 according to the second aspect of the present disclosure is the glass article 10 according to the first aspect, and preferably has a radius of curvature RH of 80 mm or more and 4500 mm or less, a radius of curvature RF of 45 mm or more and 4000 mm or less, and a radius of curvature RB of 50 mm or more and 4500 mm or less. According to the present disclosure, since the radius of curvature of each portion is within this range, a desired shape can be appropriately realized.

[0056] The glass article 10 according to the third aspect of the present disclosure is the glass article 10 according to the first or second aspect, and preferably satisfies RH > RB > RF, which makes it possible to further curve the cover glass 12, which has been curved to some extent by heat forming, so that it conforms to the shape of the frame 14, thereby enabling the desired shape to be appropriately achieved.

[0057] The glass article 10 according to the fourth aspect of the present disclosure is the glass article 10 according to any one of the first to third aspects, and preferably satisfies |RH-RB|>|RB-RF|, which makes it possible to prevent excessive deformation of the frame 14 during assembly and to appropriately achieve a desired shape.

[0058] A glass article 10 according to a fifth aspect of the present disclosure is the glass article 10 according to any one of the first to fourth aspects, and preferably has a curvature ratio BF, which is the ratio of the absolute value of the difference between the radius of curvature RB and the radius of curvature RF to the radius of curvature RB, of 0.5% to 30%. This allows a desired shape to be appropriately realized.

[0059] A glass article 10 according to a sixth aspect of the present disclosure is the glass article 10 according to any one of the first to fifth aspects, wherein the thickness of the cover glass is preferably greater than 0.7 mm. According to the present disclosure, the cover glass 12 having such a relatively large thickness can be appropriately bent into a desired shape.

[0060] A glass article 10 according to a seventh aspect of the present disclosure is the glass article 10 according to any one of the first to sixth aspects, and preferably has a plurality of curved portions with different radii of curvature, and the frame 14 has a plurality of curved portions with different radii of curvature when removed from the cover glass 12, and the cover glass 12 has a single curved portion when removed from the frame 14. By having only one curved portion in the cover glass 12, it can be attached to frames 14 of various shapes, thereby increasing versatility.

[0061] A glass article 10 according to an eighth aspect of the present disclosure is the glass article 10 according to any one of the first to seventh aspects, wherein the Young's modulus of the frame 14 is preferably 500 GPa or less. According to the present disclosure, by using an article having a Young's modulus in this range, i.e., a resin frame, it is possible to reduce the weight of the glass article.

[0062] A display device 2 according to a ninth aspect of the present disclosure includes a display 3 and the glass article 10 according to any one of the first to eighth aspects provided on the surface of the display 3. According to the present disclosure, a desired shape can be achieved without significantly deforming the frame 14 during assembly, while suppressing an increase in the weight of the frame 14.

[0063] A method for manufacturing a glass article 10 according to a tenth aspect of the present disclosure includes obtaining a heat-formed cover glass 12 having a radius of curvature RH of less than 5000 mm, obtaining a frame 14 having a radius of curvature RF of less than 4500 mm, and bonding a main surface 12B of the cover glass 12 to the frame 14 to manufacture the glass article 10, wherein, when the radius of curvature of the glass article 10 is RB, the ratio of the absolute value of the difference between the radius of curvature RB and the radius of curvature RH to the radius of curvature RB is greater than 10% and not greater than 900%. According to the present disclosure, a desired shape can be achieved without significantly deforming the frame 14 during assembly while suppressing an increase in the weight of the frame 14.

[0064] A manufacturing method for glass article 10 according to an eleventh aspect of the present disclosure is preferably the manufacturing method according to the tenth aspect, wherein when obtaining cover glasses 12, a plurality of cover glasses 12 having the same radius of curvature are obtained, when obtaining frames 14, a plurality of frames 14 having different shapes and / or rigidities are obtained, and when manufacturing glass article 10, one of different types of frames 14 is adhered to each cover glass 12 to manufacture a plurality of glass articles 10. According to the present disclosure, cover glasses 12 of the same shape can be attached to a variety of frames, thereby increasing the versatility of cover glass 12.

[0065] A method for manufacturing a glass article 10 according to a twelfth aspect of the present disclosure is the manufacturing method according to the tenth or eleventh aspect, wherein the plurality of frames 14 preferably have different radii of curvature RF. According to the present disclosure, cover glass 12 of the same shape can be attached to frames of various shapes, thereby increasing the versatility of cover glass 12.

[0066] A manufacturing method of a display device 2 according to a thirteenth aspect of the present disclosure manufactures a display device 2 by attaching a glass article 10 manufactured by the manufacturing method of any one of the ninth to twelfth aspects to a display 3. According to the present disclosure, a desired shape can be achieved without significantly deforming the frame 14 during assembly while suppressing an increase in the weight of the frame 14.

[0067] Examples Next, examples will be described. Note that the embodiment may be modified as long as the effects of the invention are achieved. Table 1 shows the glass articles of each example.

[0068]

[0069] Example 1 In Example 1, a flat glass plate manufactured by AGC was prepared, having the width (horizontal length), length (vertical length), and thickness shown in Table 1. The Young's modulus and second moment of area of ​​the cover glass were measured using the method described in this embodiment, and the values ​​shown in Table 1 were obtained. In Example 1, this glass plate was curved by heat forming to obtain a cover glass with a radius of curvature RH shown in Table 1. The cover glass had a uniaxially bent shape with the bending axis along the horizontal direction. In Example 1, an aluminum frame was prepared as the frame, having the width, thickness, and radius of curvature RF shown in Table 1. The specific gravity, Young's modulus, and second moment of area of ​​the frame were measured using the method described in this embodiment, and the values ​​shown in Table 1 were obtained. The weight of the frame is also shown in Table 1. The outer shape of the frame was the same as that of the glass plate; in other words, the horizontal and vertical lengths of the frame were the same as those of the glass plate. The frame was frame-shaped, and the width of the frame here refers to the width of one side of the frame. In Example 1, a frame was adhered to the main surface of the prepared cover glass using an adhesive tape (product number VHX1701-04) manufactured by 3M as an adhesive layer to obtain a glass article. The radius of curvature RB of the obtained glass article was as shown in Table 1. The curvature ratio BH, curvature ratio BF, and ratio (100 × |RH-RB| / |RB-RF|) were also as shown in Table 1. In Example 1, each value was calculated assuming that the radius of curvature RH was 10,000 mm.

[0070] (Examples 2 to 8) In Examples 2 to 8, glass articles were obtained in the same manner as in Example 1, except that the parameters were set as shown in Table 1. In Example 5, the radius of curvature RH was set to 10,000 mm, and each value was calculated.

[0071] As shown in Examples 1 and 5 (comparative examples) and Examples 2 to 4 and 6 to 8 (embodiments), it can be seen that by setting the curvature ratio BH within an appropriate range, it is possible to achieve a desired shape without significantly deforming the frame during assembly while suppressing an increase in frame weight. For example, with reference to Examples 1 and 2, and Examples 5 and 6, it can be seen that by setting the curvature ratio BH within an appropriate range as in Examples 2 and 6, it is possible to obtain a glass article with a similar radius of curvature RB even when the frame weight is reduced compared to Examples 1 and 5. Furthermore, with reference to Examples 1 and 3, and Examples 5 and 7, it can be seen that by setting the curvature ratio BH within an appropriate range as in Examples 3 and 7, it is possible to achieve a glass article with a smaller radius of curvature RB even when using a frame with a radius of curvature RF similar to that of Examples 1 and 5, thereby suppressing excessive deformation of the frame during assembly and achieving a desired shape.

[0072] Although the embodiments of the present invention have been described above, the embodiments are not limited to the contents of these embodiments. Furthermore, the above-described components include those that can be easily imagined by a person skilled in the art, those that are substantially the same, and those that are within the scope of what is called equivalents. Furthermore, the above-described components can be combined as appropriate. Furthermore, various omissions, substitutions, or modifications of the components can be made without departing from the spirit of the above-described embodiments.

[0073] According to the present invention, it is possible to provide a glass article, a display device, a method for manufacturing a glass article, and a method for manufacturing a display device that can obtain a desired shape while suppressing an increase in the weight of the frame and deformation of the frame during assembly.

[0074] Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the present invention. This application is based on a Japanese patent application (Patent Application No. 2023-222549) filed on December 28, 2023, the contents of which are incorporated herein by reference.

[0075] REFERENCE SIGNS LIST 1 steering shaft 2 display device 3 display 10, 20 glass article 12 cover glass 14 frame 16 adhesive layer RB, RF, RH radius of curvature

Claims

1. A glass article having a cover glass and a frame provided on a main surface of the cover glass, the glass article including a curved portion, wherein when the radius of curvature of the glass article is RB, the radius of curvature of the cover glass in a state where the cover glass is removed from the frame is RH, and the radius of curvature of the frame in a state where the frame is removed from the cover glass is RF, the radius of curvature RF is less than 4500 mm, the radius of curvature RH is less than 5000 mm, and the ratio of the absolute value of the difference between the radius of curvature RB and the radius of curvature RH to the radius of curvature RB is higher than 10% and 900% or less. A glass article.

2. The glass article according to claim 1, wherein the radius of curvature RF is 45 mm or more and 4000 mm or less, the radius of curvature RH is 80 mm or more and 4500 mm or less, and the radius of curvature RB is 50 mm or more and 4500 mm or less.

3. The glass article according to claim 1 or claim 2, wherein the radius of curvature RF, the radius of curvature RH, and the radius of curvature RB satisfy the relationship RH > RB > RF.

4. The glass article according to claim 3, wherein the radius of curvature RF, the radius of curvature RH, and the radius of curvature RB satisfy the relationship |RH - RB| > |RB - RF|.

5. The glass article according to claim 1 or claim 2, wherein the ratio of the absolute value of the difference between the radius of curvature RB and the radius of curvature RF to the radius of curvature RB is 0.5% or more and 30% or less.

6. The glass article according to claim 1 or claim 2, wherein the thickness of the cover glass is greater than 0.7 mm.

7. The glass article according to claim 1 or claim 2, wherein the glass article has a plurality of curved portions with different radii of curvature, the frame has a plurality of curved portions with different radii of curvature in a state where the frame is removed from the cover glass, and the cover glass has one curved portion in a state where the cover glass is removed from the frame.

8. The glass article according to claim 1 or claim 2, wherein the Young's modulus of the frame is 500 GPa or less.

9. A display device having a display and the glass article according to claim 1 or claim 2 provided on a surface of the display.

10. To obtain a heat-formed cover glass having a radius of curvature RH of less than 5000 mm, to obtain a frame having a radius of curvature RF of less than 4500 mm, and to manufacture a glass article by adhering the main surface of the cover glass to the frame, wherein, when the radius of curvature of the glass article is RB, the ratio of the absolute value of the difference between the radius of curvature RB and the radius of curvature RH to the radius of curvature RB is higher than 10% and 900% or less. A method for manufacturing a glass article.

11. When obtaining the cover glass, obtaining a plurality of the cover glasses having the same radius of curvature; when obtaining the frame, obtaining a plurality of the frames in which at least one of the shape and rigidity is different from each other; and when manufacturing the glass article, manufacturing a plurality of the glass articles by adhering any one of the different frames to each of the cover glasses. The method for manufacturing a glass article according to claim 10.

12. The method for manufacturing a glass article according to claim 11, wherein the plurality of the frames have different radii of curvature RF from each other.

13. A method for manufacturing a display device, comprising attaching the glass article manufactured by the method for manufacturing a glass article according to any one of claims 10 to 12 to a display.

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