Glass product and display device

Abstract

The present invention has a first main surface (2A), a second main surface (2B), and an end surface (2C) connecting the first main surface (2A) and the second main surface (2B). The end surface (2C) includes a side surface portion (2CC), a first chamfered portion (2CA) connecting the side surface portion (2CC) and the first main surface (2A), and a second chamfered portion (2CB) connecting the side surface portion (2CC) and the second main surface (2B), and a parameter R defined by formula (1) satisfies formula (2) (Ecg, A, B, C, D, and t in formula (1) are defined in the specification). R = 0.38 * Ecg-A / t-2.61 * B / t + 4.38 * C / t-10.6 * D / t (1), and R < = 23.58 (2).

Description

Technical Field

[0001] The invention relates to a glass product and a display device. Background Art

[0002] In vehicle-mounted display devices that display information required for driving, a liquid crystal display or an organic EL display is sometimes used. In the above-mentioned display devices, a cover plate member made of glass is sometimes configured to protect the front surface. For example, Patent Document 1 describes a vehicle-mounted display device that can improve the impact resistance of the cover plate member.

[0003] Patent Document 1: International Publication No. 2016 / 027812

[0004] In particular, in vehicle-mounted display devices and the like, it is required that the end portion of a cover member be provided with excellent impact resistance so as not to be broken even when struck by the head of an occupant or the like in a vehicle collision accident. Summary of the invention

[0005] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a glass product and a display device capable of suppressing cracking of an end portion.

[0006] The glass product involved in the present disclosure has a first main surface, a second main surface, and an end surface connecting the first main surface and the second main surface, wherein the end surface includes a side surface portion, a first chamfered portion connecting the side surface portion and the first main surface, and a second chamfered portion connecting the side surface portion and the second main surface, and the parameter R specified by formula (1) satisfies formula (2).

[0007] R=0.38·E cg -A / t-2.61·B / t+4.38·C / t-10.6·D / t··· (1)

[0009] R≤23.58 ··· (2)

[0010] Here, E in formula (1) cg is the Young's modulus of the glass product (GPa), A is the width of the first chamfered portion (mm), B is the width of the second chamfered portion (mm), C is the thickness of the side portion (mm), D is the thickness of the first chamfered portion (mm), and t is the thickness of the glass product (mm).

[0011] The display device according to the present disclosure is a vehicle-mounted display device in which the glass product, a display panel, and a bottom member fixed to a vehicle are stacked, and the second main surface of the glass product is located on the display panel side.

[0012] According to the present invention, it is possible to suppress breakage of the end portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram showing a display device according to this embodiment.

[0014] Figure 2 yes Figure 1 A-A section view.

[0015] Figure 3 is a schematic diagram of the bottom part.

[0016] Figure 4 It is a schematic diagram of the display device as viewed from the display surface side.

[0017] Figure 5 yes Figure 1 B-B section view.

[0018] Figure 6 yes Figure 4 C-C section view.

[0019] Fig. 7A It is a schematic partial enlarged cross-sectional view of a glass product.

[0020] Figure 7B It is a schematic partial enlarged cross-sectional view of a glass product.

[0021] Figure 8 It is a schematic diagram of a display device involved in another example of this embodiment.

[0022] Fig. 9 It is a schematic diagram of a display device involved in another example of this embodiment.

[0023] Fig.10 yes Fig. 9 D-D section view.

[0024] Fig.11 It is a schematic front view of the display device of the embodiment. DETAILED DESCRIPTION

[0025] Hereinafter, the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, the present invention is not limited to the embodiment, and in the case where there are multiple embodiments, the embodiment composed of the combination of the embodiments is also included. In addition, regarding numerical values, the range of rounding is included.

[0026] (1. Structure of display device)

[0027] Figure 1 is a schematic diagram showing a display device according to this embodiment, Figure 2 yes Figure 1 A-A section view, Figure 3This is a schematic diagram of the bottom part. Figure 4 is a schematic diagram of the display device viewed from the display surface side. Figure 5 yes Figure 1 The B-B section view, Figure 6 yes Figure 4 C-C section view.

[0028] like Figure 1 As shown, the display device 1 involved in this embodiment is a vehicle-mounted display device provided in a vehicle. The display device 1 is, for example, a vehicle navigation device, and its use is arbitrary, and it may also be other display devices such as display audio installed in the vehicle. Although the details are described later, the display device 1 is fixed to the interior part 10 of the vehicle via a fixing point P formed on the back side on the side opposite to the display surface. The interior part 10 is a component provided inside the vehicle, for example, a part of the dashboard of the vehicle.

[0029] Hereinafter, the thickness direction of the display device 1 is referred to as the Z direction, and a direction (in the direction between the Z direction and the horizontal plane) perpendicular to the Z direction in a state where the display device 1 is mounted on a vehicle is referred to as the Z direction. Figure 1 In the example, the left-right direction is the X direction, and the direction perpendicular to the Z direction and the X direction (in Figure 1 In the example, the up-down direction is taken as the Y direction. In addition, a direction along the X direction (in Figure 1 In the example, the right direction) is taken as direction X1, and another direction along the X direction (in Figure 1 In the example of the display device 1, the left direction is taken as the direction X2, one direction along the Y direction (the direction toward the upper side in the vertical direction) is taken as the direction Y1, another direction along the Y direction (the direction toward the lower side in the vertical direction) is taken as the direction Y2, one direction along the Z direction (the direction from the display surface of the display device 1 toward the back side) is taken as the direction Z1 (first direction), and another direction along the Z direction (the direction from the back side of the display device 1 toward the display surface) is taken as the direction Z2. In the present embodiment, the end of the display device 1 on the Y1 side is the upper end in the vertical direction (the upper end).

[0030] like Figure 2As shown, the display device 1 includes a glass product 2, a display panel 3, a backlight unit 4, a bottom member 5, and a side wall member 8. The display device 1 is provided with the glass product 2, the display panel 3, the backlight unit 4, and the bottom member 5 arranged in order (overlapping) toward the direction Z1, and a frame-shaped side wall member 8 is arranged around the glass product 2, the display panel 3, and the backlight unit 4. That is, the bottom member 5 and the side wall member 8 constitute a housing for storing the glass product 2 and the display panel 3, the bottom member 5 covers the back side (the side opposite to the display side) of the glass product 2 and the display panel 3, and the side wall member 8 covers the side surface of the glass product 2 and the display panel 3.

[0031] (2. Glass products)

[0032] The glass product 2 is a transparent plate-shaped component that transmits visible light. The glass product 2 has: a first principal surface 2A, which is a principal surface facing the Z2 side (display surface side); a second principal surface 2B, which is a principal surface facing the Z1 side (back side); and an end surface 2C, which connects the first principal surface 2A and the second principal surface 2B. The end surface 2C can also be called the side surface of the glass product 2. In addition, the glass product 2 is preferably a surface where the second principal surface 2B is the side of the display panel 3, and the first principal surface 2A is the surface exposed to the outside on the side opposite to the display panel 3. The glass product 2 is preferably provided with a printed layer on the second principal surface 2B side (on the second principal surface 2B). The printed layer is a layer that shields the glass product 2 (for example, a black layer that does not transmit visible light), and can also be called a layer with a lower transmittance to visible light than the glass product 2. The printed layer is preferably provided to surround the area of ​​the second principal surface 2B that overlaps with the display panel 3 when viewed from the Z direction. Furthermore, the glass product 2 may be provided with a functional layer such as an anti-glare layer, an anti-reflection layer, or an anti-fouling layer on the first main surface 2A side.

[0033] The thickness t of the glass product 2 is preferably 0.5 mm or more, more preferably 0.7 mm or more, and further preferably 1.1 mm or more. In addition, the thickness t of the glass product 2 is preferably 2.5 mm or less, more preferably 2.0 mm or less, and further preferably 1.3 mm or less. That is, the thickness t is preferably 0.5 mm or more and 2.5 mm or less, more preferably 0.7 mm or more and 2.0 mm or less, and further preferably 1.1 mm or more and 1.3 mm or less. In addition, the thickness t is the length in the Z direction from the first main surface 2A to the second main surface 2B.

[0034] In the example of the present embodiment, the glass product 2 is a rectangular flat plate when viewed from the Z direction. As for the size of the glass product 2, for example, when the glass product 2 is rectangular, the length of the long side direction (the X direction in the example of the present embodiment) can be 100 mm or more and 800 mm or less, and the length of the short side direction (the Y direction in the example of the present embodiment) can be 40 mm or more and 300 mm or less. However, the glass product 2 is not limited to a rectangular flat plate when viewed from the Z direction, and can be any shape, for example, it can be an elliptical shape when viewed from the Z direction, for example, it can also be a curved shape. In addition, the size of the glass product 2 can also be arbitrary. In addition, when the glass product 2 is a curved shape, the thickness direction of the glass product 2 at the center position of the main surface of the glass product 2 can be taken as the Z direction.

[0035] Young's modulus E of glass product 2 cg It is preferably 60 GPa or more, and more preferably 70 GPa or more. cg It is preferably 90 GPa or less, more preferably 80 GPa or less, and further preferably 75 GPa or less. That is, the Young's modulus of the glass product 2 is preferably 60 GPa or more and 90 GPa or less, more preferably 70 GPa or more and 80 GPa or less, and further preferably 70 GPa or more and 75 GPa or less. The Young's modulus of each component including the glass product 2 can be obtained by a tensile test (JIS K7161-1, 2: 2014, JIS K7113: 1995).

[0036] The glass product 2 is made of glass. The glass product 2 is preferably tempered glass, and the tempered glass is preferably chemically tempered glass.

[0037] When the glass product 2 is chemically strengthened glass, the thickness DOL of the compressive stress layer of the glass product 2 is preferably, for example, 10 μm or more, more preferably 15 μm or more, further preferably 25 μm or more, and further preferably 30 μm or more. In addition, the thickness DOL of the compressive stress layer is preferably, for example, 180 μm or less, and more preferably 50 μm or less. That is, the thickness DOL of the compressive stress layer of the glass product 2 is preferably, for example, 10 μm or more and 180 μm or less.

[0038] The surface compressive stress CS of the compressive stress layer is preferably 500 MPa or more, more preferably 650 MPa or more, and further preferably 750 MPa or more. The upper limit is not particularly limited, for example, CS is preferably 1200 MPa or less. That is, CS is preferably 500 MPa or more and 1200 MPa or less, for example.

[0039] As a method for obtaining chemically strengthened glass by subjecting glass to chemical strengthening treatment, a typical method is to immerse the glass in KNO3 molten salt, ion exchange treatment, and then cool it to near room temperature. The treatment conditions such as the temperature and immersion time of the KNO3 molten salt can be set in such a way that the surface compressive stress and the thickness of the compressive stress layer become the desired values.

[0040] Examples of the glass include soda-lime glass, aluminosilicate glass (SiO2-Al2O3-Na2O-based glass), etc. Among them, aluminosilicate glass is preferred from the viewpoint of strength.

[0041] As a glass material, for example, there can be cited a glass material which, expressed by molar % based on oxides, contains 50% to 80% of SiO2, 1% to 20% of Al2O3, 6% to 20% of Na2O, 0% to 11% of K2O, 0% to 15% of MgO, 0% to 6% of CaO, and 0% to 5% of ZrO2.

[0042] It is preferable to use aluminosilicate glass-based chemically strengthened glass (for example, "Dragontrail (registered trademark)" manufactured by AGC Corporation).

[0043] The glass product 2 mounted on such a display device 1 is required to be able to suppress the cracking of the end. In particular, the end of the glass product 2 is required to have excellent impact resistance (hereinafter referred to as "end impact resistance") such that it will not break even if it is hit by the head of an occupant in a vehicle collision accident, as evaluated by a head impact test. The structure for improving the impact resistance of the end of the glass product 2 and suppressing the cracking of the end is described below. In addition, in this embodiment, the glass product 2 is mounted on the display device 1 described above and used as a cover member of the vehicle-mounted display device 1, but it is not limited to this and can be used for any purpose.

[0044] Fig. 7A is a schematic partial enlarged cross-sectional view of a glass product. Fig. 7A As shown in FIG. 1 , the end surface 2C of the glass product 2 includes a first chamfered portion 2CA, a second chamfered portion 2CB, and a side surface portion 2CC. The side surface portion 2CC corresponds to the unchamfered portion of the end surface 2C, and the first chamfered portion 2CA and the second chamfered portion 2CB correspond to the chamfered portion of the end surface 2C. In addition, the end surface 2C may be formed over the entire area around the glass product 2 when the central axis of the glass product 2 along the Z direction is the axial direction, as shown in FIG. Fig. 7A The shape including the first chamfered portion 2CA, the second chamfered portion 2CB, and the side surface portion 2CC shown may also be such a shape in a part of the periphery.

[0045] exist Fig. 7A In the example of Fig. 7A In the example of the Y direction), the first main surface 2A and the second main surface 2B are flat (straight), but the present invention is not limited to this. When viewed from a direction perpendicular to the Z direction (in the Y direction), the first main surface 2A and the second main surface 2B are flat (straight). Fig. 7A When observed in the Y direction in the example above, it can also be a curved shape (curved).

[0046] (Side view)

[0047] The side surface portion 2CC is a surface including a portion of the end surface 2C that protrudes most toward the outside of the glass product 2. Fig. 7A In the example of FIG. 1 , the side surface portion 2CC is perpendicular to the first main surface 2A and the second main surface 2B (in Fig. 7A In the example, the Z direction is extended, but it is not limited to this, as long as it extends in a direction that is not parallel to the first main surface 2A and the second main surface 2B (a direction that intersects the X direction and the Y direction). In other words, in a direction that is orthogonal to the Z direction (in Fig. 7A When observing the glass product 2 in the Y direction in the example, it is sufficient that the line along the side surface 2CC intersects the line along the first main surface 2A and the line along the second main surface 2B. Fig. 7A In the example of Fig. 7A When observed in the Y direction in the example, the side surface portion 2CC is flat (straight), but is not limited to this. For example, the side surface portion 2CC may be chamfered in a direction perpendicular to the Z direction (in the Y direction). Fig. 7A When observed in the Y direction in the example above, it is a curved shape (curved).

[0048] (First chamfer)

[0049] The first chamfered portion 2CA connects the first main surface 2A and the side surface portion 2CC. That is, the first chamfered portion 2CA is Fig. 7A In the example of the Z direction, the first chamfered portion 2CA is located between the first main surface 2A and the side surface 2CC, and the end of the first chamfered portion 2CA facing the Z2 side is connected to the first main surface 2A, and the end of the first chamfered portion 2CA facing the Z1 side is connected to the side surface 2CC. Fig. 7A When the first chamfered portion 2CA is observed in the Y direction in the example, the first chamfered portion 2CA is directed toward the inner side of the glass product 2 (in the Y direction) as it tends toward the Z2 side. Fig. 7A In the example, it is tilted toward X1).

[0050] In the present embodiment, the first chamfered portion 2CA is in the shape of an R chamfer. In other words, the first chamfered portion 2CA is chamfered in the direction perpendicular to the Z direction (in the Fig. 7AWhen viewed from a direction perpendicular to the Z direction (in the example of the Y direction), the shape is curved (curved). Fig. 7A The radius of curvature of the first chamfered portion 2CA when observed (in the example of the Y direction) is preferably not less than 0.2 mm and not more than 20 mm, more preferably not less than 2 mm and not more than 10 mm, and further preferably not less than 2 mm and not more than 7 mm. Here, the radius of curvature of the first chamfered portion 2CA is preferably not less than 0.2 mm, more preferably not less than 2 mm, and further preferably not more than 20 mm, more preferably not more than 10 mm, and further preferably not more than 7 mm. However, the first chamfered portion 2CA is not limited to the shape of an R chamfer. For example, the first chamfered portion 2CA may also be in the shape of a C chamfer. In other words, in the direction perpendicular to the Z direction (in the Fig. 7A When observed in the Y direction (in the example), it is flat (straight line).

[0051] (Second chamfer)

[0052] The second chamfered portion 2CB connects the second main surface 2B and the side surface 2CC. That is, the second chamfered portion 2CB is located between the second main surface 2B and the side surface 2CC in the Z direction, the end of the second chamfered portion 2CB facing the Z1 side is connected to the second main surface 2B, and the end of the second chamfered portion 2CB facing the Z2 side is connected to the side surface 2CC. Fig. 7A When the second chamfered portion 2CB is observed in the Y direction in the example, the second chamfered portion 2CB is directed toward the inner side of the glass product 2 (in the Y direction) as it tends toward the Z1 side. Fig. 7A In the example, it is tilted toward X1).

[0053] In the present embodiment, the second chamfered portion 2CB has a C-chamfered shape. However, the second chamfered portion 2CB is not limited to the C-chamfered shape, and may also have an R-chamfered shape.

[0054] (Boundary position)

[0055] The positions of the first chamfered portion 2CA, the second chamfered portion 2CB, and the side portion 2CC can be determined by the boundary positions F1, F2, F3, and F4. Specifically, in the end surface 2C of the glass product 2, the area from the boundary position F1 to the boundary position F2 in the Z direction is the first chamfered portion 2CA, the area from the boundary position F2 to the boundary position F3 in the Z direction is the side portion 2CC, and the area from the boundary position F3 to the boundary position F4 in the Z direction is the second chamfered portion 2CB. That is, the boundary position F1 is the boundary position between the first main surface 2A and the first chamfered portion 2CA, the boundary position F2 is the boundary position between the first chamfered portion 2CA and the side portion 2CC, the boundary position F3 is the boundary position between the side portion 2CC and the second chamfered portion 2CB, and the boundary position F4 is the boundary position between the second chamfered portion 2CB and the second main surface 2B.

[0056] The boundary position F1 can be defined as follows.

[0057] When the cross section of the glass product 2 is observed from a direction perpendicular to the thickness direction (Z direction) of the glass product 2 through a digital microscope (e.g., VHK-6000 manufactured by KEYENS), a line along the first main surface 2A is defined as line LA. Line LA may be a straight line or arc line passing through three points, namely, position 2AP1, position 2AP2, and any intermediate point between position 2AP1 and position 2AP2, on the first main surface 2A. In addition, for example, if any point on the first chamfered portion 2CA or the side portion 2CC of the end surface 2C is defined as point F5, position 2AP1 is the intersection point of an arc with a radius of 3 mm centered on point F5 and the first main surface 2A, and position 2AP2 is the intersection point of an arc with a radius of 8 mm centered on point F5 and the first main surface 2A. When this line LA is extended to a position outside the glass product 2 than position 2AP1, a point on the first main surface 2A that is 50 μm away from the extended line of line LA and is closest to position 2AP1 may be defined as boundary position F1. In other words, the distance between the boundary position F1 and the intersection of the perpendicular line descending from the boundary position F1 toward the extension line of the line LA and the extension line is 50 μm.

[0058] The boundary positions F2 and F3 can be defined as follows.

[0059] When the cross section of the glass product 2 is observed from a direction perpendicular to the thickness direction (Z direction) of the glass product 2 through a digital microscope (e.g., VHK-6000 manufactured by KEYENS), a line perpendicular to the line LA passing through the boundary position F1 is referred to as line LA1. Here, the point where the line parallel to the line LA1 and the end face 2C meet at one point is referred to as the outermost position of the end face 2C (i.e., the position of the end face 2C that protrudes most toward the outside of the glass product 2). In this case, the intersection point (the intersection on the Z2 side) of the line parallel to the line LA1 at the outermost position of the end face 2C and the end face 2C, which is obtained by moving the line parallel to the line LA1 in a direction perpendicular to the line by 50 μm, can be referred to as the boundary position F2. On the other hand, the intersection point (the intersection on the Z1 side) of the line parallel to the line LA1 at the outermost position of the end face 2C and the end face 2C, which is obtained by moving the line parallel to the line LA1 in a direction perpendicular to the line by 50 μm, can be referred to as the boundary position F3.

[0060] The boundary position F4 can be defined as follows.

[0061] The line obtained by moving the line LA in parallel with the thickness direction (Z direction) of the glass product 2 and toward the Z1 side by the thickness t of the glass product 2 through a digital microscope (VHK-6000 manufactured by KEYENS) is referred to as the line LB. The line LB can also be referred to as the line along the second principal surface 2B. In addition, a line along the thickness direction (Z direction) is drawn from position 2AP1, and the point where it intersects with the second principal surface 2B is referred to as position 2BP1. When the line LB is extended to a position closer to the outside (X direction) of the glass product 2 than position 2BP1, the point on the second principal surface 2B that is 50 μm away from the extension line of the line LB and is closest to the position 2BP1 can be referred to as the boundary position F4. In other words, the intersection of the perpendicular line descending from the boundary position F4 to the extension line of the line LB and the extension line is 50 μm away from the boundary position F4.

[0062] In addition, Fig. 7A In the example, the boundary positions F1 and F4 of the glass product 2 in the X direction are at the same position, but the present invention is not limited thereto. The boundary positions F1 and F4 may be at positions offset in the X direction of the glass product 2.

[0063] (Parameter R)

[0064] The inventors have found that by designing the glass product 2 so that the parameter R related to the shape of the end surface 2C of the glass product 2 is within a predetermined range, the impact resistance of the end of the glass product 2 can be improved and cracking can be suppressed. Specifically, when the parameter R is set to the value shown in the following formula (1), the glass product 2 of the present embodiment can improve the impact resistance of the end of the glass product 2 and suppress cracking of the end by making the parameter R satisfy the following formula (2).

[0065] R=0.38·E cg -A / t-2.61·B / t+4.38·C / t-10.6·D / t··· (1)

[0067] R≤23.58 ··· (2)

[0068] Here, E in formula (1) cg is the Young's modulus (GPa) of the glass product 2, A is the width (mm) of the first chamfered portion 2CA, and is the width (in mm) along the main surface of the glass product 2 when the glass product 2 is observed from a direction perpendicular to the thickness direction (Z direction) (in mm). Fig. 7AIn the example of (X direction), it is the distance from boundary position F1 to boundary position F2. In addition, B in formula (1) is the width (mm) of the second chamfered portion 2CB, which is the distance from boundary position F3 to boundary position F4 in the direction along the main surface of the glass product 2 when the glass product 2 is observed from a direction perpendicular to the thickness direction. In addition, C in formula (1) is the thickness (mm) of the side portion 2CC, which is the distance from boundary position F2 to boundary position F3. In addition, D in formula (1) is the thickness (mm) of the first chamfered portion 2CA, which is the distance from boundary position F1 to boundary position F2 in the tangent direction of the outermost position of the end surface 2C when the glass product 2 is observed from a direction perpendicular to the thickness direction (Z direction). In addition, as described above, t in formula (1) is the thickness (mm) of the glass product 2.

[0069] The glass product 2 can improve the end impact resistance by making the parameter R satisfy the above-described formula (2). Here, the parameter R has a tendency to become lower as the width A of the first chamfered portion 2CA and the width B of the second chamfered portion 2CB are larger. That is, by increasing the width A of the first chamfered portion 2CA, the contact point of the impactor is separated from the end surface 2C, and by absorbing the impact of the impactor with the first main surface 2A, the impact resistance at the end surface 2C can be improved.

[0070] In addition, by increasing the width of the first chamfered portion 2CA and the second chamfered portion 2CB, the thickness of the end surface 2C becomes thinner relative to the thickness t of the glass product 2, thereby reducing the bending stress generated at the end surface 2C, and improving the impact resistance at the end surface 2C. In addition, the parameter R tends to become lower as the thickness D of the first chamfered portion 2CA increases. That is, by reducing the thickness of the end surface 2C relative to the thickness t of the glass product 2, the bending stress generated at the end surface 2C is reduced, and the impact resistance at the end surface 2C can be improved.

[0071] The contribution of the thickness D to the impact resistance is closely related to the width A. In addition, if the thickness D is the same, the parameter R tends to become higher as the thickness C of the side portion 2CC is lower. That is, by reducing the thickness of the side portion 2CC and expanding the area of ​​the first chamfered portion 2CA, the thickness of the end surface 2C is made thinner relative to the thickness t of the glass product 2, thereby reducing the bending stress generated at the end surface 2C and improving the impact resistance at the end surface 2C. If the parameter R is preferably R≤22.17, the frequency of cracking during impact can be further suppressed.

[0072] It is preferable that the width A of the first chamfered portion 2CA is larger than 0 mm and equal to or smaller than 2 mm.

[0073] The ratio of the width A of the first chamfered portion 2CA to the thickness t of the glass product 2, that is, the glass product thickness ratio A / t is preferably 0.77 or more, more preferably 1.15 or more. By setting the width A within this range, the impact resistance at the end surface 2C can be more appropriately improved.

[0074] The width B of the second chamfered portion 2CB is preferably larger than 0 mm, more preferably 1.0 mm or more, and preferably 2 mm or less. That is, the width B of the second chamfered portion 2CB is preferably larger than 0 mm and 2 mm or less, and more preferably 1.0 mm or more and 2 mm or less.

[0075] In addition, the ratio of the width B of the second chamfered portion 2CB to the thickness t of the glass product 2, that is, the glass product thickness ratio B / t is preferably 0.77 or more, more preferably 1.15 or more, and preferably 4.0 or less, more preferably 2.86 or less. That is, B / t is preferably 0.77 or more and 4.0 or less, more preferably 1.15 or more and 2.86 or less. By setting the width B in this range, the impact resistance at the end surface 2C can be more appropriately improved.

[0076] The thickness C of the side surface portion 2CC is preferably less than the thickness t of the glass product 2, more preferably less than 2 mm, and preferably greater than 0 mm, more preferably greater than 0.2 mm, and further preferably greater than 0.25 mm. That is, the thickness C of the side surface portion 2CC is preferably greater than 0 mm and less than 2 mm, more preferably greater than 0.2 mm and less than 2 mm, and further preferably greater than 0.25 mm and less than 2 mm.

[0077] The ratio of the thickness C of the side surface portion 2CC to the thickness t of the glass product 2, that is, the glass product thickness ratio C / t is preferably 0.6 or less, more preferably 0.5 or less. By setting the thickness C within this range, the impact resistance at the end surface 2C can be more appropriately improved.

[0078] The thickness D of the first chamfered portion 2CA is preferably greater than 0 mm, more preferably greater than 0.1 mm, and preferably less than the thickness t of the glass product 2, more preferably less than 2 mm. That is, the thickness D of the first chamfered portion 2CA is preferably greater than 0 mm and less than the thickness t of the glass product 2, more preferably greater than 0 mm and less than 2 mm, and further preferably greater than 0.1 mm and less than 2 mm.

[0079] In addition, the ratio of the thickness D of the first chamfered portion 2CA to the thickness t of the glass product 2, that is, the glass product thickness ratio D / t is preferably 0.1 or more, more preferably 0.2 or more, and preferably 0.7 or less. That is, D / t is preferably 0.1 or more and 0.7 or less. By setting the thickness D in this range, the impact resistance at the end surface 2C can be more appropriately improved.

[0080] That is, as a preferred embodiment of the chamfered portion, the following embodiment can be cited.

[0081] (i) The width A of the first chamfered portion 2CA is 2 mm or less, and the glass product thickness ratio A / t is 0.77 or more, the glass product thickness ratio B / t of the width B of the second chamfered portion 2CB is 0.77 or more and 4.0 or less, the thickness C of the side portion 2CC is 0.2 mm or more, and the glass product thickness ratio C / t is 0.6 or less, and the glass product thickness ratio D / t of the thickness D of the first chamfered portion 2CA is 0.1 or more and 0.7 or less.

[0082] (ii) The width A of the first chamfered portion 2CA is 2 mm or less, and the glass product thickness ratio A / t is 1.15 or more, the glass product thickness ratio B / t of the width B of the second chamfered portion 2CB is 1.15 or more and 2.86 or less, the thickness C of the side portion 2CC is 0.2 mm or more, and the glass product thickness ratio C / t is 0.6 or less, and the glass product thickness ratio D / t of the thickness D of the first chamfered portion 2CA is 0.1 or more and 0.7 or less.

[0083] (iii) The width A of the first chamfered portion 2CA is 2 mm or less, and the glass product thickness ratio A / t is 0.77 or more, the width B of the second chamfered portion 2CB is 1.0 mm or more and 2 mm or less, the thickness C of the side portion 2CC is 0.2 mm or more, and the glass product thickness ratio C / t is 0.6 or less, and the glass product thickness ratio D / t of the thickness D of the first chamfered portion 2CA is 0.1 or more and 0.7 or less.

[0084] (iv) The width A of the first chamfered portion 2CA is 2 mm or less, the glass product thickness ratio A / t is 0.77 or more, the width B of the second chamfered portion 2CB is 1.0 mm or more and 2 mm or less, the thickness C of the side portion 2CC is 0.2 mm or more, the glass product thickness ratio C / t is 0.6 or less, and the glass product thickness ratio D / t of the thickness D of the first chamfered portion 2CA is 0.1 or more and 0.7 or less. In addition, the first chamfered portion 2CA has a curved shape.

[0085] (v) The width A of the first chamfered portion 2CA is 2 mm or less, the glass product thickness ratio A / t is 1.15 or more, the width B of the second chamfered portion 2CB is 1.0 mm or more and 2 mm or less, the thickness C of the side portion 2CC is 0.2 mm or more, the glass product thickness ratio C / t is 0.6 or less, and the glass product thickness ratio D / t of the thickness D of the first chamfered portion 2CA is 0.1 or more and 0.7 or less. In addition, the first chamfered portion 2CA has an R-chamfered shape, and the second chamfered portion 2CB has a C-chamfered shape.

[0086] Furthermore, as a preferred embodiment of the chamfered portion, the following embodiment can be cited.

[0087] In addition, in the following (vi) to (vii), the Young's modulus of the glass product is 60 GPa or more and 80 GPa or less, and the thickness C of the side surface portion 2CC is 0.2 mm or more. The glass product having a Young's modulus of 60 GPa or more and 80 GPa or less is suitable as a chemically strengthened glass for a cover member of a vehicle-mounted display device, and by setting the thickness C of the side surface portion 2CC to 0.2 mm or more, it is possible to suppress the damage of the side surface portion during manufacturing.

[0088] (vi) The glass product thickness ratio D / t of the thickness D of the first chamfered portion 2CA is greater than 0.25, and the glass product thickness ratio A / t of the width A of the first chamfered portion 2CA is greater than 1.0.

[0089] When D / t is larger than 0.25, the width A of the first chamfered portion 2CA contributes greatly to the impact resistance of the end surface 2C, so it is particularly effective to increase the width A. (A / t) is more preferably 1.10 or more, and even more preferably 1.5 or more.

[0090] (vii) The glass product thickness ratio D / t of the thickness D of the first chamfered portion 2CA is 0.25 or less, the glass product thickness ratio A / t of the width A of the first chamfered portion 2CA is 2.0 or less, and the glass product thickness ratio B / t of the width B of the second chamfered portion 2CB is 1.10 or more.

[0091] When D / t is 0.25 or less, the width B has a relatively large influence on the impact resistance at the end surface 2C, so it is preferable to increase the width B. In particular, when the glass product is used for a cover member for a display device, when the first chamfered portion 2CA that can be recognized by the user cannot be increased due to design reasons, the impact resistance at the end surface 2C can be intentionally improved by increasing the value of the width B. In this case, for example, the width B>width A may be set.

[0092] Furthermore, as a preferred embodiment of the chamfered portion, the following embodiment can be cited.

[0093] In addition, in the following (viii) to (iX), the Young's modulus of the glass product is 60 GPa or more and 80 GPa or less, and the thickness C of the side portion 2CC is 0.2 mm or more. Glass having a Young's modulus of 60 GPa or more and 80 GPa or less is suitable as a chemically strengthened glass for a cover plate of a vehicle-mounted display device, and by making the thickness C of the side portion 2CC 0.2 mm or more, it is possible to suppress the damage of the side portion during manufacturing.

[0094] (viii) The glass product thickness ratio A / t of the width A of the first chamfered portion 2CA is larger than 1.5.

[0095] When the width A is sufficiently large, the impact resistance at the end surface 2C can be easily improved.

[0096] (iX) The glass product thickness ratio A / t of the width A of the first chamfered portion 2CA is greater than or equal to 0.3 and less than or equal to 1.5, the glass product thickness ratio B / t of the width B of the second chamfered portion 2CB is greater than or equal to 0.7, and the glass product thickness ratio D / t of the thickness D of the first chamfered portion 2CA is greater than or equal to 0.14.

[0097] Even if the width A cannot be increased sufficiently, the impact resistance at the end surface 2C can be improved by increasing the thickness D and the width B and adjusting the balance between the width and thickness of the first chamfered portion 2CA and the second chamfered portion 2CB in a manner that satisfies equations (1) and (2).

[0098] (X) The glass product thickness ratio B / t of the width B of the second chamfered portion 2CB is greater than 1.5.

[0099] When the width B is sufficiently large, the impact resistance at the end surface 2C can be easily improved. In this case, the width A<the width B may be satisfied.

[0100] Furthermore, as a preferred embodiment of the chamfered portion, the following embodiment can be cited.

[0101] (Xi) The thickness C of the side surface portion 2CC is less than 0.2 mm.

[0102] When the thickness C of the side surface portion 2CC can be sufficiently reduced, the impact resistance at the end surface 2C can be easily improved, the width A and the width B can be selected relatively freely, and the options for the appearance design can be expanded.

[0103] As described above, it is important to adjust the balance between the width and thickness of the first chamfered portion 2CA and the second chamfered portion 2CB in a manner that satisfies equations (1) and (2) to determine the appearance design of the end face 2C. Therefore, the end face 2C is preferably an asymmetric shape. The asymmetric shape means that the thickness D of the first chamfered portion and the thickness t-(C+D) of the second chamfered portion are different, or the width A of the first chamfered portion and the width B of the second chamfered portion are different.

[0104] As described above, the glass product 2 according to the present embodiment includes: the first main surface 2A, the second main surface 2B, and the end surface 2C connecting the first main surface 2A and the second main surface 2B. The end surface 2C includes: the side surface 2CC, the first chamfered portion 2CA connecting the side surface 2CC and the first main surface 2A, and the second chamfered portion 2CB connecting the side surface 2CC and the second main surface 2B. The parameter R represented by the formula (1) of the glass product 2 satisfies the formula (2). The glass product 2 according to the present embodiment is formed into a shape in which the parameter R satisfies the formula (2), so that the impact resistance of the end portion can be improved and the cracking of the end portion can be suppressed.

[0105] Figure 7B is a schematic partial enlarged cross-sectional view of a glass product. Fig. 7A In the example, the case where the main surface of the glass product 2 is flat is taken as an example, but Figure 7B Even when the glass product 2 is curved, the numerical range of the parameter R, the thickness and width of the first chamfered portion 2CA, the second chamfered portion 2CB and the side portion 2CC are the values ​​shown above.

[0106] (3. Configuration Examples of Other Components of Display Device)

[0107] Next, a configuration example of the display device 1 using the glass product 2 according to the present embodiment will be described, more specifically, a configuration example of components other than the glass product 2 of the display device 1 will be described. The configuration of components other than the glass product 2 of the display device 1 is not limited to the following description.

[0108] (Display Panel)

[0109] The display panel 3 is a panel for displaying an image, and is arranged on the Z1 side of the glass product 2 in a manner overlapping the glass product 2. The surface of the display panel 3 facing the Z2 side, that is, the display surface, is bonded to the second main surface 2B of the glass product 2 via an adhesive layer (not shown). The adhesive layer is, for example, an OCA (Optical Clear Adhesive) film or an OCA tape, and its thickness (length in the Z direction) is, for example, 5 μm or more and 400 μm or less, preferably 50 μm or more and 200 μm or less.

[0110] The display panel 3 is a liquid crystal panel, an organic EL panel, a flexible organic EL panel, a PDP, an electronic ink type panel, etc., and may also have a touch panel, etc. In the case where the display panel 3 has a glass substrate, the thickest part is the glass substrate, which controls the rigidity of the entire display panel. Therefore, the Young's modulus of the glass substrate may also be regarded as the Young's modulus of the display panel 3.

[0111] The Young's modulus of the display panel 3 is preferably 2 GPa or more, more preferably 60 GPa or more, and further preferably 70 GPa or more. The Young's modulus of the display panel 3 is preferably 90 GPa or less, and more preferably 75 GPa or less. That is, the Young's modulus of the display panel 3 is preferably 2 GPa or more and 90 GPa or less, more preferably 60 GPa or more and 75 GPa or less, and further preferably 70 GPa or more and 75 GPa or less.

[0112] The thickness of the display panel 3 is preferably 0.05 mm or more, more preferably 1.0 mm or more, and further preferably 1.1 mm or more. The thickness of the display panel is preferably 2.0 mm or less, and more preferably 1.3 mm or less. That is, the thickness of the display panel 3 is preferably 0.05 mm or more and 2.0 mm or less. In addition, the thickness of the display panel 3 is the length in the Z direction from the main surface of the display panel 3 facing the Z1 side to the main surface facing the Z2 side.

[0113] like Figure 1 As shown, the distance from the end of the glass product 2 facing the Y1 side to the end of the display panel 3 facing the Y1 side when viewed from the Z direction is referred to as the distance S1. From the viewpoint of bonding and holding the glass product 2 with sufficient bonding strength, the distance S1 is preferably 2 mm or more and 30 mm or less, and more preferably 5 mm or more and 20 mm or less. Here, the distance S1 is preferably 2 mm or more, and more preferably 5 mm or more, and preferably 30 mm or less, and more preferably 20 mm or less. In addition, the numerical range of the distance S1 can also be applied to the distance from the end of the glass product 2 facing the Y2 side to the end of the display panel 3 facing the Y2 side.

[0114] In addition, if Figure 1 As shown, the distance from the end of the glass product 2 facing the X1 side to the end of the display panel 3 facing the X1 side when viewed from the Z direction is referred to as the distance S2. From the viewpoint of adhesive strength and the viewpoint of appearance design, the distance S2 is preferably 2 mm or more and 200 mm or less, and more preferably 5 mm or more and 150 mm or less. Here, the distance S2 is preferably 2 mm or more, and more preferably 5 mm or more, and preferably 200 mm or less, and more preferably 150 mm or less. In addition, the numerical range of the distance S2 can also be applied to the distance from the end of the glass product 2 facing the X2 side to the end of the display panel 3 facing the X2 side.

[0115] (Backlight unit)

[0116] The backlight unit 4 is a light source that irradiates the display panel 3 with light for image display, and is arranged on the side of the display panel 3 in the direction Z1 so as to overlap with the display panel 3 .

[0117] The backlight unit 4 is generally composed of a lens sheet, a diffusion sheet, a light guide plate, a lamp, a reflector, etc. Among these components, the light guide plate is usually the thickest, and the light guide plate controls the rigidity of the entire backlight unit 4. Therefore, the Young's modulus of the light guide plate can be regarded as the Young's modulus of the backlight unit 4.

[0118] The Young's modulus of the backlight unit 4 is preferably 1 GPa or more, more preferably 2 GPa or more, and further preferably 60 GPa or more. The Young's modulus of the backlight unit 4 is preferably 90 GPa or less, and further preferably 85 GPa or less. That is, the Young's modulus of the backlight unit 4 is preferably 1 GPa or more and 90 GPa or less, more preferably 2 GPa or more and 85 GPa or less, and further preferably 60 GPa or more and 85 GPa or less.

[0119] The thickness of the backlight unit 4 is preferably 1 mm or more, more preferably 2 mm or more, and further preferably 3 mm or more. The thickness of the backlight unit 4 is preferably 10 mm or less, more preferably 6 mm or less, and further preferably 5 mm or less. That is, the thickness of the backlight unit 4 is preferably 1 mm or more and 10 mm or less. In addition, the thickness of the backlight unit 4 is the length in the Z direction from the main surface of the backlight unit 4 facing the Z1 side to the main surface facing the Z2 side.

[0120] Furthermore, the backlight unit 4 may not be provided in the display device 1. In this case, the display device 1 sequentially arranges (overlaps) the glass product 2, the display panel 3, and the bottom member 5 in the direction Z1. When the backlight unit 4 is not provided, a self-luminous display panel that does not require the backlight unit 4, such as an organic EL panel or a micro LED panel, is selected as the display panel 3.

[0121] (Bottom part)

[0122] The bottom member 5 is arranged on the Z1 side of the display panel 3 (the backlight unit 4 in this embodiment) so as to overlap with the display panel 3 (the backlight unit 4 in this embodiment), and can be called the bottom portion of the housing.

[0123] The bottom member 5 has a plate portion 6. The plate portion 6 is a plate-shaped member arranged to overlap the display panel 3. In addition, the bottom member 5 may also include a rib 7. The rib 7 is a member formed to protrude from the main surface 6A of the plate portion 6 toward the Z1 side, and is in the shape of a quadrangular prism in this embodiment. By making the bottom member 5 have a shape having the rib 7, it is possible to achieve a lighter display device 1 than making it a thick plate shape without the rib 7.

[0124] like Figure 3 As shown in FIG. 1 , when the bottom member 5 of the present embodiment is viewed from the direction Z1 toward the direction Z2, a plurality of ribs 7 are provided in a lattice shape on the bottom member 5. Specifically, Figure 3 The plurality of ribs 7 (rib 71, rib 72, rib 73 and rib 74) extending in the Y direction and Figure 3 The plurality of ribs 7 (rib 75, rib 76 and rib 77) extending in the X direction intersect each other. However, the shape of the rib 7 is not limited to Figure 3 , may be arbitrary, for example, may be a curved shape instead of a straight line shape, and may not be arranged in a lattice shape. In addition, the bottom member 5 may not have the ribs 7. In this case, the bottom member 5 is composed of only the plate portion 6.

[0125] exist Figure 5 In the embodiment, a fixing point P is formed on the main surface 5A facing the Z1 side of the bottom member 5. The fixing point P is a portion of the bottom member 5 that becomes an interface for fixing to a vehicle (in this embodiment, the interior portion 10), and in this embodiment, is a portion where a bracket 9 described later is mounted.

[0126] The bottom member 5 is fixed to the bracket 9 in a state where the main surface 5A contacts the fixing member (here, the bracket 9). If the area of ​​the main surface 5A that contacts the fixing member is regarded as the contact area, the fixing point P can be referred to as a point on the contact area. The fixing point P can be any position on the contact area, for example, Figure 4 In the figure, the fixed point P (fixed point P1 to fixed point P4) is illustrated as the midpoint position of the side of each contact area in the X direction of the side facing the Y2 side. In this way, the fixed point P can also be the midpoint position of the side of the contact area in the X direction of the side facing the Y2 side. In addition, it can be said that one fixed point P is formed in each contact area. That is, in the case where there are multiple fixed points P, it can be said that multiple contact areas are formed at separate positions, and one fixed point P is formed in each contact area. In the case where there is one fixed point P, the contact area can also be said to be one.

[0127] For example, when the display device 1 (bottom member 5) is fixed to the bracket 9, the position of the main surface 5A overlapping with the midpoint of one side of the end of the convex surface 9a of the bracket 9 (i.e., the midpoint of the side of the contact area facing the Y2 side in the X direction) may be used as the fixing point P. In addition, when the bottom member 5 is fixed to the bracket 9 by a fixing member such as a bolt, the fixing point P may be a position where a hole (e.g., a bolt hole) for inserting the fixing member is opened in the main surface 5A, and when the bottom member 5 is fixed to the bracket 9 by a plurality of fixing members in each contact area, it may be a central position between the positions where holes (e.g., bolt holes) for inserting the fixing member are opened. In addition, for example, when the bottom member 5 is fixed to the bracket 9 by an adhesive or the like, the fixing point P may be a point on the contact area on the main surface 5A to which the adhesive is applied. In addition, for example, there is also a case where a protrusion is formed on the main surface 5A of the bottom member 5 and the protrusion is inserted into a recess formed in the vehicle (in the present embodiment, the interior part 10) to fix it to the vehicle. In this case, the bracket 9 need not be provided separately, and the protrusion of the bottom member 5 can be regarded as the bracket 9. In this case, the surface of the protrusion of the bottom member 5 facing the Z1 side becomes the contact area, and the point on the contact area can be used as the fixed point P. In addition, for example, there is also a case where a recess is formed on the main surface 5A of the bottom member 5 and a protrusion formed on the vehicle (in this embodiment, the interior part 10) is inserted into the recess of the main surface 5A to be fixed to the vehicle. In this case, the bracket 9 need not be provided separately, and the protrusion of the vehicle can be regarded as the bracket 9. In this case, the surface of the recess of the bottom member 5 facing the Z1 side becomes the contact area, and the point on the contact area can be used as the fixed point P. The position of the fixed point P and the like will be described later.

[0128] For example, when the bottom member 5 has ribs 7, the Young's modulus is preferably 1.5 GPa or more and 100 GPa or less, and more preferably 40 GPa or more and 80 GPa or less. Here, when the bottom member 5 has ribs 7, the Young's modulus is preferably 1.5 GPa or more, and more preferably 40 GPa or more, and preferably 100 GPa or less, and more preferably 80 GPa or less. For example, when the bottom member 5 does not have ribs 7, the Young's modulus is preferably 40 GPa or more and 250 GPa or less, and more preferably 60 GPa or more and 230 GPa or less. Here, when the bottom member 5 does not have ribs 7, the Young's modulus is preferably 40 GPa or more, and more preferably 60 GPa or more, and preferably 250 GPa or less, and more preferably 230 GPa or less.

[0129] As a material of the bottom member 5, for example, a metal (single substance) or an alloy containing a metal element such as aluminum or magnesium is preferable. Alternatively, the bottom member 5 may be made of a resin or a laminate of a resin layer and a metal layer.

[0130] (Side wall parts)

[0131] The side wall member 8 is a frame-shaped member provided so as to surround the glass product 2 , the display panel 3 , and the backlight unit 4 when viewed from the Z direction, and can be said to be a side wall portion of the housing.

[0132] exist Figure 2 In the example of the present embodiment, the side wall component 8 has side wall components 8a and 8b. The side wall component 8a includes components 8a1 and 8a2. Component 8a1 is a frame-shaped portion surrounding the glass product 2. Component 8a2 is a portion protruding from the end of component 8a1 facing the Z1 side toward the inner side of the glass product 2 along the Z direction. The central axis of the glass product 2 is an axis that passes through the center point of the glass product 2 when viewed from the Z direction and extends in the Z direction. Component 8a2 supports the area on the outer peripheral side of the second main surface 2B of the glass product 2 facing the Z1 side with the surface facing the Z2 side protruding from component 8a1. In the present embodiment, component 8a2 and the glass product 2 are bonded via an adhesive layer.

[0133] The side wall member 8b is a frame-shaped member provided on the Z1 side of the side wall member 8a, and in this embodiment, is configured to surround the display panel 3 and the backlight unit 4. In this embodiment, the surface of the side wall member 8b facing the Z2 side is bonded to the side wall member 8a via an adhesive layer.

[0134] In addition, the shape of the side wall components 8a and 8b is not limited to the above description, and can be any. In addition, in the present embodiment, two side wall components 8a and 8b are provided as the side wall component 8, but the structure of the side wall component 8 is not limited to this, and can be any. For example, the side wall component 8 can also be composed of one component, or can be composed of three or more components.

[0135] The Young's modulus of the side wall member 8 is preferably 1 GPa or more and 250 GPa or less, and more preferably 2 GPa or more and 20 GPa or less. Here, the Young's modulus of the side wall member 8 is preferably 1 GPa or more, and more preferably 2 GPa or more, and preferably 250 GPa or less, and more preferably 20 GPa or less. In addition, when the side wall member 8 is composed of a plurality of parts, the Young's modulus of each part is preferably within the above range.

[0136] As a material of the side wall member 8, for example, a metal (single substance) or an alloy containing a metal element such as aluminum or magnesium is preferred. In addition, as a material of the side wall member 8, a resin may be used, or a laminate of a resin layer and a metal layer may be used. In addition, when the side wall member 8 is composed of a plurality of parts, each part may be formed of a different material.

[0137] In addition, in the present embodiment, the side wall member 8 is a member separate from the bottom member 5, but the present invention is not limited thereto, and the side wall member 8 and the bottom member 5 may be an integral member. In addition, for example, a part of the plurality of members constituting the side wall member 8 may be integral with the bottom member 5, and the other parts may be separate from the bottom member 5. That is, for example, the side wall member 8b may be integral with the bottom member 5, and the side wall member 8a may be separate from the bottom member 5.

[0138] Although the display device 1 of this embodiment has the above structure, the display device 1 is not limited to the above description and can have any structure. For example, in the example of this embodiment, the bottom member 5 is arranged on the side most toward Z1 among the components of the display device 1, but it is not limited to this. For example, a component may be provided at a position closer to the Z1 side than the bottom member 5. That is, even if there are other components at a position closer to the Z1 side than the bottom member 5, the layer (bottom member 5) forming the fixed point P can be treated as the bottom in this embodiment. In other words, the layer on which the fixed point P is formed and which is on the side most toward Z1 is treated as the bottom member 5.

[0139] (4. Fixed state of display device)

[0140] Next, a state in which the display device 1 is fixed to the interior portion 10 of the vehicle will be described. Hereinafter, fixing of the display device 1 will be described.

[0141] (Fixed point)

[0142] As described above, the main surface 5A of the bottom member 5 of the display device 1 facing the Z1 side is formed with a fixing point P for fixing to the interior portion 10. In the present embodiment, a plurality of fixing points P are provided. Figure 4 In the example, four fixed points P1, P2, P3, and P4 are provided. The fixed points P1 and P2 are arranged in the X direction (the width direction of the vehicle when installed on the vehicle). The fixed points P3 and P4 are located toward the Y2 side (the vertically downward side when installed on the vehicle) relative to the fixed points P1 and P2, and are arranged in the X direction. The line passing through the fixed points P1 and P2 and the line passing through the fixed points P3 and P4 are parallel to each other, and the fixed points P1 to P4 form the four vertices of a rectangle.

[0143] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown in FIG. 1 , a bracket 9 as a fixing member may be installed at the fixing point P. In this case, the bottom member 5 is fixed to the interior portion 10 via the bracket 9. In the example of this embodiment, Figure 4As shown, a bracket 91 is installed at the fixing point P1, a bracket 92 is installed at the fixing point P2, a bracket 93 is installed at the fixing point P3, and a bracket 94 is installed at the fixing point P4.

[0144] like Figure 5 As shown in FIG. 1 , the bracket 9 is a long plate-like member bent into a U-shape. The center of the bracket 9 in the plate width direction is positioned at the fixing point P. The convex surface 9a ( Figure 5 One side of the end of the bracket 9 (the surface facing the Y2 side) is connected to the fixed point P. The direction perpendicular to the convex surface 9a of the bracket 9 intersects perpendicularly with the X direction (the width direction of the vehicle). One surface 9b of the bracket 9 connected to the convex surface 9a is connected to the bottom member 5, and the other surface 9c connected to the convex surface 9a is connected to the interior portion 10. That is, the position of the main surface 5A of the bottom member 5 where the midpoint of one side of the end of the convex surface 9a of the bracket 9 overlaps (that is, the midpoint of the side of the contact area facing the Y2 side in the X direction) is the fixed point P. The bracket 9, the bottom member 5, and the interior portion 10 are fixed, for example, by screws (not shown). In addition, the shape of the bracket 9 is not limited to the above description, and can be arbitrary, for example, it can be bent into an S shape.

[0145] Since the display device 1 is mounted on the vehicle via the bracket 9 in this manner, the display device 1 and the bracket 9 can be said to constitute a display device unit.

[0146] In addition, the bottom member 5 may not use the bracket 9 but may be fixed to the interior part 10 by deforming a part of the bottom member 5, for example. Conversely, a part of the interior part 10 may be deformed and fixed to the bottom member 5. In this case, each fixing point P may be defined as the center of each fixing portion.

[0147] The position and number of the fixed points P are not limited to the above description. An arbitrary number of fixed points P may be formed, and in this case, the position of each fixed point P may be arbitrary.

[0148] (Midpoint PQ)

[0149] In the following, in order to explain the position of the fixed point P in the Y direction relative to the display device 1 (YH / YH to be described later), cg ), and define the middle point PQ. The middle point PQ is the midpoint between the fixed point P1 and the fixed point P2. If the distance between the middle point PQ and the fixed point P1 (or the distance between the middle point PQ and the fixed point P2) is taken as the distance X, from the viewpoint of making the vibration characteristics (JISD 1601: 1995 Automobile Parts Vibration Test Method) appropriate, the distance X is preferably 30 mm or more and 200 mm or less, and more preferably 50 mm or more and 130 mm or less. Here, the distance X is preferably 30 mm or more, and more preferably 50 mm or more, and preferably 200 mm or less, and more preferably 130 mm or less.

[0150] In addition, if the distance between the fixed point P1 and the fixed point P3 (or the distance between the fixed point P2 and the fixed point P4) arranged in the Y direction is taken as the distance Y, the distance Y is preferably 30 mm or more and 200 mm or less, and more preferably 35 mm or more and 125 mm or less, for the same reason as the distance X. Here, the distance Y is preferably 30 mm or more, and more preferably 35 mm or more, and is preferably 200 mm or less, and more preferably 125 mm or less.

[0151] As described above, since the number and positions of the fixed points P are arbitrary, the definition of the intermediate point PQ for each change in the position of the fixed point P will be described below.

[0152] Among the fixed points P provided on the bottom member 5, two fixed points P are selected from the Y1 side (upward in the vertical direction), and the midpoint between the two selected fixed points P is set as the middle point PQ. Figure 1 to Figure 5 2 shows a state where the bottom member 5 is fixed to the interior portion 10 at four fixing points P (fixing points P1 to P4) arranged two by two in the Y direction. Figure 1 to Figure 5 As shown in FIG. 1 , when there are multiple fixed points P in the Y direction, the two fixed points closest to the Y1 side (in the Y direction) are used as the fixed points P for defining the intermediate point PQ (and the virtual surface T described later). Figure 1 to Figure 4 In the figure, there are fixed points P1 and P2).

[0153] When there are three or more fixed points P at the same position (same height) in the Y direction, two fixed points P with the narrowest interval between the fixed points P are selected, and the midpoint between them is used as the middle point PQ. When there are three or more fixed points at equal intervals in the same position in the Y direction, the midpoint of any two combinations of the fixed points P with the narrowest interval can be used as the middle point PQ. That is, when there are multiple candidates for the middle point PQ (and the virtual surface T described later), any one of them can meet the requirements of this embodiment.

[0154] The bottom member 5 can also be fixed to the interior part 10 via three fixing points P. For example, Figure 4 For the purpose of explanation, it is assumed that there is no fixed point P1 and fixed point P2, and instead, there is another fixed point P′ ( Figure 4In this case, the bottom member 5 is fixed to the interior portion 10 at three points, namely, the fixed point P3, the fixed point P4, and the fixed point P′. At this time, if there is no position (height) difference between the fixed point P3 and the fixed point P4 in the Y direction, a fixed point closer to the fixed point P′ is selected, and the midpoint between the selected fixed point and the fixed point P′ is set as the middle point PQ. In the case where there is no difference in distance from the fixed point P′, either one is selected, and the midpoint between the selected fixed point and the fixed point P′ is set as the middle point PQ. In addition, in the case where the fixed point P3 and the fixed point P4 are at different positions in the Y direction, two fixed points P (fixed point P′, and the fixed point facing the Y1 side among the fixed point P3 and the fixed point P4) are selected from the Y1 side, and the midpoints between the selected fixed points are set as the middle point PQ.

[0155] (YH / YH cg )

[0156] like Figure 4 As shown in FIG. 1 , a plane passing through the middle point PQ and perpendicular to the line connecting the fixed point P1 and the fixed point P2 (the two fixed points P used in the definition of the middle point PQ) is set as the virtual plane T. Figure 5 As shown in FIG. 1 , the length of the intersection line between the glass product 2 and the imaginary plane T is taken as the distance YH cg In addition, if Figure 5 As shown in FIG. 1 , the length of the intersection line of the main surface of the display panel 3 and the imaginary plane T from the upper end (the end toward the Y1 side) of the display panel 3 to the point corresponding to the middle point PQ is taken as the distance YH. The “point corresponding to the middle point PQ” refers to a point obtained by moving the middle point PQ in the thickness direction (Z direction) of the display device 1 and positioning it on the main surface of the display panel 3.

[0157] The display device 1 is preferably a display device with a distance YH and a distance YH cg The ratio of YH / YH cg The position of the fixed point P is set so that it is less than 0.5. That is, the display device 1 is preferably an "indashboard type or on dashboard type (hereinafter also referred to as "indashboard type")" display device in which the upper end is also fixed to the interior part 10. The display device 1 is more preferably a YH / YH cg is 0.1 or more and 0.5 or less, and more preferably 0.3 or more and 0.5 or less. cg It is preferably 0.1 or more, more preferably 0.3 or more, and preferably 0.5 or less.

[0158] In addition, in the ratio YH / YH cgWhen the value is greater than 0.5, it can be said that the "standing type" is adopted in which only the lower end of the bottom member is fixed to the instrument panel.

[0159] The display device 1 is fixed to the vehicle in the above-described manner.

[0160] (5. Layer structure of display device)

[0161] Next, a preferred layer structure of the display device 1 will be described.

[0162] (Equidistant point H0 and reference point H)

[0163] Here, if Fig. 7A As shown, the boundary position (corner portion) between the first main surface 2A of the glass product 2 and the first chamfered portion 2CA of the end surface 2C is defined as the boundary position F1 as described above. In addition, the boundary position between the first chamfered portion 2CA of the end surface 2C of the glass product 2 and the side surface 2CC is defined as the boundary position F2 as described above.

[0164] Here, the straight line connecting the boundary position F1 and the boundary position F2 is referred to as LC1. On the straight line LC1, a point at a distance of 0.25 mm from the boundary position F2 to the boundary position F1 is referred to as point F6. A line passing through point F6 and perpendicular to the straight line LC1 is referred to as straight line LC2. The intersection of the straight line LC2 and the first chamfered portion 2CA is referred to as point F7.

[0165] In this case, if Figure 4 As shown in FIG. 1 , at point F7 on the Y1 side of the glass product 2, the position where the distances from each of the two fixed points P used in the definition of the intermediate point PQ become equal when viewed from the Z direction is defined as the equidistant point H0. In the example of the present embodiment, the fixed points P1 and P2 are used in the definition of the intermediate point PQ, so the equidistant point H0 can be said to be a point where the distances from the fixed point P1 and the distances from the fixed point P2 of the point F7 on the Y1 side of the glass product 2 become equal when viewed from the Z direction. That is, in the example of the present embodiment, the distance L1 from the equidistant point H0 to the fixed point P1 as viewed from the Z direction is equal to the distance L2 from the equidistant point H0 to the fixed point P2 as viewed from the Z direction.

[0166] In addition, in the extending direction of the boundary position F1 on the Y1 side of the glass product 2 (at Figure 4 In the example of the X direction), the positions on the boundary position F1 away from the equidistant point H0 by a predetermined distance V1 are set as points H1 and H2. Figure 4In the example, the position on the boundary position F1 away from the equidistant point H0 by a predetermined distance V1 toward X2 is point H1, and the position on the boundary position F1 away from the equidistant point H0 by a predetermined distance V1 toward X1 is point H2. In this case, any position between point H1 and point H2 on the boundary position F1 in the direction Y1 of the glass product 2 is set as the reference point H. That is, the reference point H can be said to be on one side (in the direction extending from the equidistant point H0 to the boundary position F1) Figure 4 In the example, it is toward the X2 side) away from the position of the predetermined distance V1 (at Figure 4 In the example of point H1), and one side of the extension direction toward the boundary position F1 (at Figure 4 In the example, it is toward X1 side) away from the position of the predetermined distance V1 (at Figure 4 In the example of point H2), the position is at the boundary position F1 between the points. The prescribed distance V1 here can be set arbitrarily, for example, it can be 18 mm.

[0167] The reference point H may be any position between the point H1 and the point H2 on the boundary position F1 facing the Y1 side, but is preferably set to a position where the rigidity becomes the smallest among the positions between the point H1 and the point H2 on the boundary position F1 facing the Y1 side. In the example of this embodiment, since the position where the rigidity becomes the smallest among the positions between the point H1 and the point H2 is the equidistant point H0, the equidistant point H0 is treated as the reference point H.

[0168] However, the reference point H is not limited to the position where the rigidity between the point H1 and the point H2 becomes the smallest. For example, the equidistant point H0 may be treated as the reference point H without considering the rigidity.

[0169] The reference point H may be, for example, the position of a striking point where an impactor is caused to collide in a head impact test.

[0170] (Imaginary line V)

[0171] Next, an imaginary line V is defined. Figure 4 The CC section in the figure is a section passing through the reference point H and along the Y direction. Figure 6 The cross section shown. Figure 6As shown, an imaginary line passing through the reference point H and the bottom member 5 and inclined at an angle θ relative to the Z direction is referred to as an imaginary line V. That is, the imaginary line V can be said to be a line passing through the reference point H and inclined at an angle θ radially inward relative to the Z direction. The radial direction here refers to the radial direction when the central axis of the glass product 2 passing through the Z direction is the axial direction. In addition, as described above, the central axis of the glass product 2 is an axis passing through the center point of the glass product 2 when viewed from the Z direction and extending in the Z direction. In addition, in the present embodiment, the angle θ is greater than 30° and less than 45°. The imaginary line V can be said to correspond to a direction in which a high impact is transmitted when an impact is applied to the boundary position F1 in a head impact test or the like.

[0172] (Layer structure on imaginary line V)

[0173] The display device 1 preferably has the glass product 2 as the first layer on the virtual line V defined as above, and the components up to the nth layer are arranged excluding the bottom component 5. The number represented by n is an integer greater than 2. That is, it can be said that the display device 1 preferably has the glass product, n-1 components excluding the glass product 2 and the bottom component 5, and the bottom component 5 arranged along the virtual line V. Figure 6 In the example, the display device 1 is configured with a first layer of glass products 2, a second layer of side wall components 8a, a third layer of side wall components 8b, and a bottom component 5 arranged in sequence along an imaginary line V. In this example, n=3.

[0174] The number represented by n, that is, the total number of members other than the glass product 2 and the bottom member 5 existing on the virtual line V is 2 or more, preferably 3 or more, and more preferably 4 or more. In addition, the number represented by n is preferably 20 or less, and more preferably 10 or less. That is, the number represented by n is, for example, 2 to 20.

[0175] The display device 1 according to the present embodiment is composed of a stack of a glass product 2 , a display panel 3 , and a bottom member 5 fixed to a vehicle, and the second principal surface 2B of the glass product 2 is located on the display panel side (toward the Z1 side).

[0176] In addition, if the direction from the glass product 2 toward the bottom member 5 in the thickness direction (Z direction) of the glass product 2 is defined as the first direction (direction Z1), the bottom member 5 includes a plate portion 6 and a rib 7 protruding from a main surface 6B of the plate portion 6 on the Z1 side, and at least two fixing points P fixed to the vehicle are formed on the main surface on the Z1 side. A virtual plane passing through a midpoint PQ of two fixing points P of the at least two fixing points and perpendicular to a line connecting the two fixing points P is defined as a virtual plane T, and the length of the intersection line between the first main surface 2A and the virtual plane T is defined as a distance YH. cgWhen the length from the upper end to the point corresponding to the midpoint PQ on the intersection line of the main surface of the display panel 3 and the imaginary plane T is taken as the distance YH, the distance YH is equal to the distance YH cg The ratio of YH / YH cg Is below 0.5.

[0177] The display device 1 according to the present embodiment is a display device having a ratio of YH / YH cg The display device for a vehicle mounted on an instrument panel is not less than 0.5. In such an instrument panel embedded display device, it is particularly required to improve the end impact resistance to suppress the cracking of the end of the glass product 2. In view of this, the display device 1 involved in this embodiment is designed so that the glass product 2 satisfies the formula (2), so the end impact resistance can be improved and the cracking of the end of the glass product 2 can be suppressed.

[0178] (6. Other examples)

[0179] In the above embodiments, a plurality of fixed points P are formed, but there may be only one fixed point P. When there is only one fixed point P, the virtual surface T and the reference point H are defined differently from when there are multiple fixed points P, so the following description will be made. Figure 8 It is a schematic diagram of a display device involved in another example of this embodiment.

[0180] like Figure 8 As shown, the bottom part 5 is fixed to the vehicle via a fixing point P. Figure 8 In the example of FIG. 5 , the bottom member 5 is fixed to the bracket 9 via a fixing point P, and is thus fixed to the vehicle via the bracket 9 .

[0181] Thus, when there is only one fixed point P, a virtual plane perpendicular to the side of the convex surface 9a of the bracket 9 disposed at the one fixed point P that contacts the bottom member 5 is used as a plane for defining the distance YH and the distance YH. cg (Refer to Figure 4 ) is an imaginary plane T. In addition, an imaginary plane passing through the fixed point P and along the thickness direction (Z direction) of the glass product 2 at the fixed point P and the vertical direction (Y direction) when mounted on the vehicle can also be used as the imaginary plane T.

[0182] Thus, in the case where the fixed point P is one, Figure 8 As shown, at the boundary position F1 on the Y1 side of the glass product 2, the position where the distance from the fixed point P becomes the shortest when viewed from the Z direction is set as the equidistant point H0. The method of defining the reference point H based on the equidistant point H0 is the same as that in the above embodiment, so the description is omitted. Figure 8 In the example, the position of the equidistant point H0 is the reference point H.

[0183] Thus, when there is only one fixed point P, the virtual plane T and the reference point H are defined differently from when there are multiple fixed points P, but other aspects can be treated the same. That is, it can be said that even when there is only one fixed point P, the display device 1 preferably satisfies equation (2).

[0184] Fig. 9 is a schematic diagram of a display device according to another example of this embodiment. Fig.10 yes Fig. 9 At least one of the components (intermediate components) other than the glass product 2 and the bottom component 5 on the imaginary line V may have a rib on the surface facing the Z2 side. Fig. 9 and Fig.10 As shown, a case where a side wall member 8c is provided as the side wall member 8 and the side wall member 8c has a rib will be described as an example.

[0185] like Fig.10 As shown, the side wall member 8c has a base 8c1 and ribs 8c2. The base 8c1 is a frame-shaped member surrounding the glass product 2 and the display panel 3. The ribs 8c2 are members protruding from the surface of the base 8c1 toward the Z2 side. Fig.10 In the example, the rib 8c2 extends along the Y direction, and a plurality of ribs 8c2 are arranged in the X direction. The surface of the rib 8c2 facing the Z2 side is bonded to the second main surface 2B of the glass product 2 facing the Z1 side via an adhesive layer, for example. In addition, the resin layer 8d is filled between the ribs 8c2, but the present invention is not limited to this, and it may be a cavity filled with nothing. In addition, the adhesive layer and the resin layer 8d may not be treated as components on the imaginary line V.

[0186] In the above description, an example is described in which one of the members (intermediate members) other than the glass product 2 and the bottom member 5 on the virtual line V has a rib, but ribs may be formed on the surfaces of a plurality of intermediate members facing the Z2 side.

[0187] In addition, Fig.10 In the example, the side wall member 8c is taken as an example, so the base is frame-shaped, but the shape of the base is not limited to the frame shape, and can be any, for example, it can also be a flat plate-shaped member. In addition, the shape, number and arrangement method of the ribs are not limited to Fig.10 The example can be arbitrary.

[0188] The present disclosure describes the following inventions, but is not limited thereto.

[0189] (1) A glass product 2 having a first main surface 2A, a second main surface 2B, and an end surface 2C connecting the first main surface 2A and the second main surface 2B, wherein:

[0190] The end surface 2C includes a side surface portion 2CC, a first chamfered portion 2CA connecting the side surface portion 2CC and the first main surface 2A, and a second chamfered portion 2CB connecting the side surface portion 2CC and the second main surface 2B.

[0191] The parameter R defined by equation (1) satisfies equation (2).

[0192] R=0.38·E cg -A / t-2.61·B / t+4.38·C / t-10.6·D / t··· (1)

[0194] R≤23.58···(2)

[0195] Here, E in formula (1) cg is the Young's modulus of the glass product (GPa), A is the width of the first chamfered portion (mm), B is the width of the second chamfered portion (mm), C is the thickness of the side portion (mm), D is the thickness of the first chamfered portion (mm), and t is the thickness of the glass product (mm).

[0196] (2) The glass product according to (1), wherein

[0197] The width A of the first chamfered portion 2CA is larger than 0mm and less than 2mm, the width B of the second chamfered portion 2CB is larger than 0mm and less than 2mm, the thickness C of the side portion 2CC is larger than 0mm and less than 2mm, and the thickness D of the first chamfered portion 2CA is larger than 0mm and less than 2mm.

[0198] (3) The glass product according to (1) or (2), wherein:

[0199] The glass product is a tempered glass having a compressive stress layer with a thickness of 10 μm or more, a thickness of 0.5 mm or more and 2.5 mm, and a Young's modulus of 60 GPa or more and 90 GPa or less.

[0200] (4) The glass product according to any one of (1) to (3), wherein:

[0201] The width B of the second chamfered portion 2CB is 1.0 mm or more.

[0202] (5) The glass product according to any one of (1) to (4), wherein:

[0203] The thickness C of the side surface portion 2CC is greater than or equal to 0.25 mm.

[0204] (6) The glass product according to any one of (1) to (5), wherein:

[0205] The thickness D of the first chamfered portion 2CA is not less than 0.1 mm and not more than 0.7 times the thickness t of the glass product 2 .

[0206] (7) The glass product according to any one of (1) to (6), wherein

[0207] The end surface is asymmetrical, the thickness D of the first chamfered portion and the thickness t-(C+D) of the second chamfered portion are different, or the width A of the first chamfered portion and the width B of the second chamfered portion are different.

[0208] (8) The glass product according to any one of (1) to (3) and (7), wherein:

[0209] The width A of the first chamfered portion 2CA is less than 2 mm, and the ratio of the width A to the thickness t of the glass product 2, i.e., the glass product thickness ratio A / t, is greater than 0.77. The width B of the second chamfered portion 2CB is greater than 1.0 mm and less than 2 mm. The thickness C of the side portion 2CC is greater than 0.2 mm, and the ratio of the thickness C of the side portion 2CC to the thickness t of the glass product 2, i.e., the glass product thickness ratio C / t, is less than 0.6. The ratio of the thickness D of the first chamfered portion 2CA to the thickness t of the glass product 2, i.e., the glass product thickness ratio D / t, is greater than 0.1 and less than 0.7.

[0210] (9) The glass product according to any one of (1) to (3) and (7), wherein:

[0211] The Young's modulus is greater than or equal to 60 GPa and less than or equal to 80 GPa, the thickness C of the side surface portion 2CC is greater than or equal to 0.2 mm, the glass product plate thickness ratio D / t of the thickness D of the first chamfered portion 2CA is greater than 0.25, and the glass product plate thickness ratio A / t of the width A of the first chamfered portion 2CA is greater than 1.0.

[0212] (10) The glass product according to any one of (1) to (3) and (7), wherein:

[0213] The Young's modulus is greater than or equal to 60 GPa and less than or equal to 80 GPa, the thickness C of the side surface portion 2CC is greater than or equal to 0.2 mm, the glass product plate thickness ratio D / t of the thickness D of the first chamfered portion 2CA is less than or equal to 0.25, the glass product plate thickness ratio A / t of the width A of the first chamfered portion 2CA is less than or equal to 2.0, and the glass product plate thickness ratio B / t of the width B of the second chamfered portion 2CB is greater than or equal to 1.10.

[0214] (11) The glass product according to any one of (1) to (3) and (7), wherein:

[0215] The Young's modulus is 60 GPa or more and 80 GPa or less, the thickness C of the side surface portion 2CC is 0.2 mm or more, and the glass product thickness ratio A / t of the width A of the first chamfered portion 2CA is greater than 1.5.

[0216] (12) The glass product according to any one of (1) to (3) and (7), wherein:

[0217] The Young's modulus is greater than or equal to 60 GPa and less than or equal to 80 GPa, the thickness C of the side surface portion 2CC is greater than or equal to 0.2 mm, the glass product plate thickness ratio A / t of the width A of the first chamfered portion 2CA is greater than or equal to 0.3 and less than or equal to 1.5, the glass product plate thickness ratio B / t of the width B of the second chamfered portion 2CB is greater than or equal to 0.7, and the glass product plate thickness ratio D / t of the thickness D of the first chamfered portion 2CA is greater than or equal to 0.14.

[0218] (13) The glass product according to any one of (1) to (3) and (7), wherein:

[0219] The Young's modulus is 60 GPa or more and 80 GPa or less, the thickness C of the side surface portion 2CC is 0.2 mm or more, and the glass product thickness ratio A / t of the width A of the first chamfered portion 2CA is greater than 1.5.

[0220] (14) The glass product according to any one of (1) to (3) and (7), wherein:

[0221] The Young's modulus is 60 GPa or more and 80 GPa or less, the thickness C of the side surface portion 2CC is 0.2 mm or more, and the glass product thickness ratio B / t of the width B of the second chamfered portion 2CB is greater than 1.5.

[0222] (15) The glass product according to any one of (1) to (3) and (7), wherein:

[0223] The thickness C of the side surface portion 2CC is less than 0.2 mm.

[0224] (16) The glass product according to any one of (1) to (15), wherein:

[0225] Used as a cover member of the vehicle-mounted display device 1.

[0226] (17) The glass product according to (16), wherein:

[0227] A printed layer is provided on the second main surface 2B.

[0228] (18) A vehicle-mounted display device, wherein:

[0229] The glass product 2 described in any one of (1) to (17), a display panel 3, and a bottom member 5 fixed to a vehicle are stacked, and the second main surface 2B of the glass product 2 is located on the display panel 3 side.

[0230] (19) A display device according to (18), wherein:

[0231] The Young's modulus of the glass product 2 is 60 GPa to 90 GPa, the Young's modulus of the display panel 3 is 20 GPa to 90 GPa, and the Young's modulus of the bottom member 5 is 40 GPa to 250 GPa.

[0232] (20) A display device according to (18) or (19), wherein:

[0233] If the direction from the glass product 2 toward the bottom member 5 in the thickness direction of the glass product 2 is defined as the first direction (direction Z1), the bottom member 5 includes a plate portion 6 and a rib 7 protruding from a main surface of the plate portion 6 on the first direction side, and the main surface on the first direction side is formed with at least two fixed points P fixed to the vehicle, a virtual plane passing through the middle point of the two fixed points P and perpendicular to a line connecting the two fixed points P is defined as a virtual plane T, and the length of the intersection line between the main surface of the glass product 2 and the virtual plane T is defined as a distance YH cg When the length from the upper end to the point corresponding to the midpoint on the intersection line of the main surface of the display panel 3 and the virtual plane T is taken as the distance YH, the distance YH is equal to the distance YH cg The ratio of YH / YH cg Is below 0.5.

[0234] Next, examples will be described. In addition, the embodiments may be modified as long as the effects of the invention are achieved.

[0235] In the embodiment, a simulation model of the display device 1 is generated, and a simulation of applying an impact to the reference point H is performed on the simulation model of the display device 1, thereby simulating a head impact test. The following describes the model of each example. Tables 1 to 3 are tables for describing each example.

[0236] [Table 1] Table 1

[0237]

[0238] [Table 2] Table 2

[0239]

[0240] [Table 3]

[0241] Table 3

[0242]

[0243] (Example 1)

[0244] Fig.11 1 is a schematic front view of the display device of the embodiment. In Example 1, the following Fig.11 The simulation model of the display device 1 is shown. Fig.11 As shown in FIG. 1 , the model of the display device 1 includes a glass product 2, a display panel 3, a side wall member 8c having a rib on the Z2 side, and a bottom member 5. That is, the model of the display device 1 adopts Fig. 9 , Fig.10 The structure described in .

[0245] In the model of the display device 1 of Example 1, the dimensions of the glass product 2 in the X direction are set to 250 mm, in the Y direction are set to 150 mm, and the Young's modulus Ecg is set to 74 GPa. In addition, the width A of the first chamfered portion 2CA, the width B of the second chamfered portion 2CB, the thickness C of the side portion 2CC, the thickness D of the first chamfered portion 2CA, and the thickness t of the glass product 2 in the Z direction are set to the values ​​shown in Tables 1 to 3.

[0246] In the model of the display device 1 , the dimensions of the display panel 3 in the X direction are set to 170 mm, in the Y direction are set to 125 mm, and the thickness in the Z direction is set to 1.1 mm.

[0247] The distance S1 between the Y-direction end of the glass product 2 and the Y-direction end of the display panel 3 was set to 12 mm, and the distance S2 between the X-direction end of the glass product 2 and the X-direction end of the display panel 3 was set to 40 mm.

[0248] In the model of the display device 1, the dimensions of the bottom member 5 in the X and Y directions are set to be the same as those of the glass product 2, and the thickness of the plate portion 6 is set to 2 mm. D Set to 70GPa.

[0249] The thickness of the base 8c1 of the side wall member 8c in the Z direction was set to 1.5 mm, and the value L / 2 which was half the distance L between the ribs 8c2 closest to the reference point H was set to 13 mm. The Young's modulus of the side wall member 8c was set to 2.2 GPa.

[0250] In the model of the display device 1, the surface of the bottom member 5 facing the Z1 side is formed at a ratio of YH / YH cg The fixing point P is set to 0.5, and the bracket 9 is arranged. The position of each fixing point in the X direction is set to the center position between the end of the glass product 2 in the X direction and the end of the display panel 3 in the X direction.

[0251] The reference point H is set at a position where the distances from the fixed points P1 and P2 are equal on the corner portion 2D on the Y1 side of the glass product 2 .

[0252] In addition, as shown in Tables 1 to 3, the parameter R is calculated using equation (1). If the parameter R satisfies equation (2), it is determined as Yes, and if it does not satisfy equation (2), it is determined as No.

[0253] (Example 2~Example 83)

[0254] In Examples 2 to 83, as shown in Tables 1 to 3, the width A of the first chamfered portion 2CA, the width B of the second chamfered portion 2CB, the thickness C of the side portion 2CC, the thickness D of the first chamfered portion 2CA, the thickness t of the glass product 2 in the Z direction, and the Young's modulus E of the glass product 2 were changed relative to Example 1. cg At least one of them generates a model.

[0255] (evaluate)

[0256] A simulation was performed in which an impactor was made to collide with the reference point H of the model generated in each example under the following conditions.

[0257] Impact energy of the impactor: 152J

[0258] Impactor weight: 6.8kg

[0259] Impactor diameter: 165mm

[0260] Impactor impact angle (the inclination angle of the impactor's impact direction relative to the Z direction): 30°

[0261] (Evaluation results)

[0262] The analysis results of the stress generated in the glass product 2 when the impactor hits the reference point H are obtained by simulation. A+ is defined as the case where the maximum stress generated in the glass product 2 is less than the threshold value for cracking and is 5.1% or more lower than the threshold value, A is defined as the case where the maximum stress generated in the glass product 2 is 0% to 5.0% lower than the threshold value for cracking, B is defined as the case where the maximum stress generated in the glass product 2 is greater than the threshold value for cracking and is 0% to 5.0% greater than the threshold value, and B- is defined as the case where the maximum stress generated in the glass product 2 is 5.1% or more higher than the threshold value for cracking. A+ and A are defined as pass, and B and B- are defined as fail.

[0263] Furthermore, in the case of the same structure, due to the strength variation of the glass product 2, even with the same generated stress, some may crack and some may not crack, and the closer the generated stress value is to the cracking threshold, the higher the frequency of cracking occurs.

[0264] A+ and A indicate that the maximum stress generated is below the threshold, and the cover glass is not likely to be broken by the head impact test. B and B- indicate that the maximum stress generated is greater than the threshold, and the cover glass is likely to be broken by the head impact test. In addition, in the case of A+, the frequency of cracking can be intentionally suppressed.

[0265] As shown in Tables 1 to 3, it can be seen that in Examples 1, 5, 7, 8, 14, 15, 18, 21, 22, 29, 30, 31, 37, 42, 52, 55, 57, 59, 64 to 66, 68, 71, 72, 74, 75, 77, 78, 80 to 83, where the parameter R satisfies the formula (2), the evaluation is acceptable and the cracking of the glass product 2 can be suppressed. On the other hand, it can be seen that in the other Examples, which are comparative examples, the evaluation is unacceptable and the cracking of the glass product 2 cannot be suppressed. In addition, for example, as shown in Examples 82 and 83, the larger the width B of the second chamfered portion 2CB is, the higher the evaluation result is, so it can be seen that it is preferable to increase the width B of the second chamfered portion 2CB.

[0266] The above describes the embodiments of the present invention, but the embodiments are not limited by the contents of the embodiments. In addition, the above-mentioned constituent elements include constituent elements that can be easily thought of by those skilled in the art, substantially the same constituent elements, and constituent elements within the so-called equivalent scope. Moreover, the above-mentioned constituent elements can be appropriately combined. Moreover, various omissions, substitutions or changes of constituent elements can be made within the scope of the gist of the above-mentioned embodiments.

[0267] This application is based on the Japanese patent application (Japanese Patent Application No. 2022-080347) filed on May 16, 2022, the contents of which are incorporated herein by reference.

[0268] Description of Reference Numerals

[0269] 1…display device; 2…glass product; 2A…first main surface; 2B…second main surface; 2C…end surface; 2CA…first chamfered portion; 2CB…second chamfered portion; 2CC…side portion; 3…display panel; 4…backlight unit; 5…bottom member; 6…plate portion; 7…rib; 8…side wall member; 9…bracket; 10…interior portion.

Claims

1. A glass product comprising a first main surface, a second main surface, and an end surface connecting the first main surface and the second main surface, It is characterized in that The end surface includes a side surface portion, a first chamfered portion connecting the side surface portion and the first main surface, and a second chamfered portion connecting the side surface portion and the second main surface. The parameter R specified by equation (1) satisfies equation (2), R=0.38·E cg -A / t-2.61·B / t+4.38·C / t-10.6·D / t··· (1) R≤23.58···(2) Here, E in formula (1) cg is the Young's modulus of the glass product (GPa), A is the width of the first chamfered portion (mm), B is the width of the second chamfered portion (mm), C is the thickness of the side portion (mm), D is the thickness of the first chamfered portion (mm), and t is the thickness of the glass product (mm).

2. The glass product according to claim 1, characterized in that: The width A of the first chamfered portion is greater than 0 mm and less than 2 mm, The width B of the second chamfered portion is greater than 0 mm and less than 2 mm, The thickness C of the side surface is greater than 0 mm and less than 2 mm, The thickness D of the first chamfered portion is greater than 0 mm and is less than or equal to 2 mm.

3. The glass product according to claim 1 or 2, characterized in that: The glass product is a tempered glass having a compressive stress layer having a thickness of 10 μm or more. Thickness is 0.5mm or more and 2.5mm, The Young's modulus is 60 GPa or more and 90 GPa or less.

4. The glass product according to claim 1 or 2, characterized in that: The width B of the second chamfered portion is greater than or equal to 1.0 mm.

5. The glass product according to claim 1 or 2, characterized in that: The thickness C of the side surface portion is greater than or equal to 0.25 mm.

6. The glass product according to claim 1 or 2, characterized in that: The thickness D of the first chamfered portion is greater than or equal to 0.1 mm and less than or equal to 0.7 times the thickness t of the glass product.

7. The glass product according to claim 1 or 2, characterized in that: The end surface is asymmetrical, a thickness D of the first chamfered portion and a thickness t-(C+D) of the second chamfered portion have different values, or a width A of the first chamfered portion and a width B of the second chamfered portion have different values.

8. The glass product according to claim 1 or 2, characterized in that: The width A of the first chamfered portion is 2 mm or less, and the ratio of the width A of the first chamfered portion to the thickness of the glass product, that is, the glass product thickness ratio A / t, is 0.77 or more. The width B of the second chamfered portion is greater than or equal to 1.0 mm and less than or equal to 2 mm. The thickness C of the side surface is 0.2 mm or more, and the ratio of the thickness C of the side surface to the thickness of the glass product, that is, the glass product thickness ratio C / t, is 0.6 or less. A glass product thickness ratio D / t, which is a ratio of a thickness D of the first chamfered portion to a thickness of the glass product, is 0.1 or more and 0.7 or less.

9. The glass product according to claim 1 or 2, characterized in that: The Young's modulus is 60 GPa or more and 80 GPa or less, the thickness C of the side surface is 0.2 mm or more, The glass product thickness ratio D / t of the thickness D of the first chamfered portion is greater than 0.25, The glass product thickness ratio A / t of the width A of the first chamfered portion is greater than 1.

0.

10. The glass product according to claim 1 or 2, characterized in that: The Young's modulus is 60 GPa or more and 80 GPa or less, the thickness C of the side surface is 0.2 mm or more, The glass product thickness ratio D / t of the thickness D of the first chamfered portion is 0.25 or less, The glass product thickness ratio A / t of the width A of the first chamfered portion is 2.0 or less, The glass product thickness ratio B / t of the width B of the second chamfered portion is 1.10 or more.

11. The glass product according to claim 1 or 2, characterized in that: The Young's modulus is 60 GPa or more and 80 GPa or less, the thickness C of the side surface is 0.2 mm or more, The glass product thickness ratio A / t of the width A of the first chamfered portion is greater than 1.

5.

12. The glass product according to claim 1 or 2, characterized in that: The Young's modulus is 60 GPa or more and 80 GPa or less, the thickness C of the side surface is 0.2 mm or more, The glass product thickness ratio A / t of the width A of the first chamfered portion is 0.3 or more and 1.5 or less, The glass product thickness ratio B / t of the width B of the second chamfered portion is 0.7 or more, The glass product thickness ratio D / t of the thickness D of the first chamfered portion is 0.14 or more.

13. The glass product according to claim 1 or 2, characterized in that: The Young's modulus is 60 GPa or more and 80 GPa or less, the thickness C of the side surface is 0.2 mm or more, The glass product thickness ratio A / t of the width A of the first chamfered portion is greater than 1.

5.

14. The glass product according to claim 1 or 2, characterized in that: The Young's modulus is 60 GPa or more and 80 GPa or less, the thickness C of the side surface is 0.2 mm or more, The glass product thickness ratio B / t of the width B of the second chamfered portion is greater than 1.

5.

15. The glass product according to claim 1 or 2, characterized in that: The thickness C of the side surface portion is less than 0.2 mm.

16. The glass product according to claim 1 or 2, characterized in that: Used as a cover member for vehicle-mounted display devices.

17. The glass product according to claim 8, characterized in that A printed layer is provided on the second main surface.

18. A vehicle-mounted display device, characterized in that: The glass product according to claim 1 or 2, a display panel, and a bottom member fixed to a vehicle are stacked, wherein the second main surface of the glass product is located on the display panel side.

19. The display device according to claim 18, characterized in that The glass product has a Young's modulus of 60 GPa or more and 90 GPa or less. The Young's modulus of the display panel is greater than or equal to 20 GPa and less than or equal to 90 GPa. The Young's modulus of the bottom member is 40 GPa or more and 250 GPa or less.

20. The display device according to claim 18, characterized in that If the direction from the glass product toward the bottom member in the thickness direction of the glass product is taken as the first direction, The bottom member has a plate portion and a rib protruding from a main surface of the plate portion on the first direction side, and at least two fixing points fixed to the vehicle are formed on the main surface on the first direction side. A virtual plane passing through the middle point of two of the fixed points and perpendicular to the line connecting the two fixed points is defined as a virtual plane T, and the length of the intersection line between the main surface of the glass product and the virtual plane T is defined as a distance YH. cg , when the length from the upper end to the point corresponding to the midpoint in the intersection line of the main surface of the display panel and the imaginary plane T is taken as the distance YH, the distance YH is equal to the distance YH cg Ratio YH / YH cg Is below 0.5.

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