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

Abstract

A glass laminate (10) according to the present invention comprises a glass base (20) having a first main surface (20A) and a second main surface (20B), a functional layer (30) provided on the first main surface (20A) side of the glass base (20) and comprising at least one layer selected from the group consisting of an anti-glare layer, an anti-reflection layer, and an antifouling layer, and a colored layer (40) provided on the second main surface (20B) side of the glass base (20) and comprising a hole formation region in which a plurality of holes (46) are provided, the transmittance of visible light in the hole-forming region is 5% or more.

Description

Technical Field

[0001] The present invention relates to a glass laminate, a display device, a device, and a method for manufacturing the glass laminate. Background Art

[0002] In display devices such as car navigation devices and smartphones, a cover material is used as a front panel of a touch panel or display panel. A structure is known in which a glass laminate is provided with a light-shielding decorative layer on one main surface of such a cover material. In recent years, a technology for improving the design of a cover material when no image is displayed has become known. For example, Patent Document 1 describes a method of providing a decorative sheet having a pattern portion and a plurality of transmissive portions on the surface of a cover material of a display device. According to Patent Document 1, when an image is displayed, the image is visible through the transmissive portion, and when an image is not displayed, the pattern portion is visible, thereby improving the design.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2020 / 040195 Summary of the Invention

[0006] However, the display device of Patent Document 1 raises concerns about scratches on the outermost surface of the cover member. Furthermore, in configurations where multiple transmissive portions are included within the pattern portion, the boundary between areas within the pattern portion where transmissive portions are formed and areas where no transmissive portions are formed may be visible (i.e., seamlessness may be reduced), potentially causing discomfort to the user. Therefore, improvements in scratch resistance and seamlessness are desired.

[0007] An object of the present invention is to provide a glass laminate, a display device, a device, and a method for producing a glass laminate that can improve scratch resistance and seamlessness.

[0008] The glass laminate disclosed herein comprises: a glass substrate having a first main surface and a second main surface, a functional layer arranged on the first main surface side of the glass substrate and comprising one or more selected from an anti-glare layer, an anti-reflection layer and an anti-fouling layer, and a colored layer arranged on the second main surface side of the glass substrate and comprising a hole-forming region having a plurality of holes; the visible light transmittance of the hole-forming region is greater than 5%.

[0009] The display device of the present disclosure includes the glass laminate and an irradiation unit provided on the second main surface side of the glass laminate and irradiating light toward the glass laminate.

[0010] The display device of the present disclosure includes the glass laminate and a display panel. The display panel is provided on the second main surface side so as to face the hole-forming region. The hole-forming region has an area larger than that of the display panel.

[0011] The display device of the present disclosure includes the glass laminate and a light source portion. The light source portion is provided on the second main surface side so as to face the hole-forming region.

[0012] The device disclosed herein includes the glass laminate and a photosensor, wherein the photosensor is provided on the second main surface side so as to face the hole forming region.

[0013] The manufacturing method of the glass laminate disclosed in the present invention includes: preparing a glass substrate having a first main surface and a second main surface, forming a functional layer comprising one or more selected from an anti-glare layer, an anti-reflection layer and an anti-fouling layer on the first main surface side of the above-mentioned glass substrate, and forming a colored layer comprising a hole-forming area provided with a plurality of holes on the second main surface side of the above-mentioned glass substrate; the visible light transmittance of the above-mentioned hole-forming area is greater than 5%.

[0014] According to the present invention, it is possible to improve the scratch resistance and the seamlessness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram showing the device of the first embodiment.

[0016] Figure 2 It is a schematic cross-sectional view of the device of the first embodiment.

[0017] Figure 3 This is a schematic plan view of a colored layer in the glass laminate according to the first embodiment.

[0018] Figure 4 It is a schematic diagram for explaining a preferred shape of a hole.

[0019] Figure 5 It is a schematic diagram for explaining a preferred shape of a hole.

[0020] Figure 6 It is a schematic cross-sectional view showing the step of forming a colored layer by transfer decoration.

[0021] Figure 7 It is a schematic cross-sectional view showing the step of forming a colored layer by transfer decoration.

[0022] Figure 8 It is a schematic cross-sectional view of the device of the second embodiment.

[0023] Figure 9 It is a schematic plan view of a colored layer in the glass laminate according to the second embodiment.

[0024] Figure 10 It is a schematic cross-sectional view of the device of the third embodiment. DETAILED DESCRIPTION

[0025] The glass laminate disclosed herein comprises: a glass substrate having a first main surface and a second main surface, a functional layer arranged on the first main surface side of the glass substrate and comprising one or more selected from an anti-glare layer, an anti-reflection layer and an anti-fouling layer, and a colored layer arranged on the second main surface side of the glass substrate and comprising a hole-forming region having a plurality of holes; the visible light transmittance of the hole-forming region is greater than 5%.

[0026] Furthermore, a display device according to the present disclosure includes the glass laminate and an irradiation unit provided on the second main surface side of the glass laminate and irradiating light toward the glass laminate.

[0027] The following describes in detail preferred embodiments of the present invention with reference to the accompanying drawings. It should be noted that the present invention is not limited to these embodiments. Furthermore, when there are multiple embodiments, combinations of these embodiments are also included. Numerical values ​​include rounded-off values.

[0028] (First embodiment)

[0029] In the first embodiment, the glass laminate preferably has a center spacing of less than 40 μm between adjacent holes in the hole forming region, and an aperture ratio (a ratio of the total area of ​​the plurality of holes to the total area of ​​the hole forming region) of 25% or more.

[0030] In the first embodiment, the display device preferably includes the glass laminate and a display panel, wherein the display panel is provided on the second main surface side facing the hole forming region, and the hole forming region has an area larger than that of the display panel.

[0031] (Device)

[0032] Figure 1 Schematic diagram showing the device of the first embodiment. Figure 1 As shown, the device 2 of the first embodiment is a display device installed in a vehicle, for example, installed in front of the steering shaft 1 in the vehicle. The device 2 includes an irradiation unit 3 and a glass laminate 10. The irradiation unit 3 is a device for irradiating light to the glass laminate 10. The glass laminate 10 is used as a cover material for the surface (front surface) of the irradiation unit 3. However, Figure 1 The configuration is an example, and the device 2 using the glass laminate 10 may have any configuration. In addition, the glass laminate 10 is not limited to being used as a surface covering material for a display device for a vehicle, but may also be used for any purpose such as a surface covering material for a display device such as a smartphone.

[0033] Figure 2 Schematic cross-sectional view of the device of the first embodiment. Figure 2 As shown, the device 2 of the first embodiment is a display device in which a display panel 3 a serving as an irradiation unit 3 and a glass laminate 10 are stacked.

[0034] Hereinafter, the direction in which the display panel 3a and the glass laminate 10 are stacked is referred to as the Z direction. Figure 2 In the example, the left and right directions) are set as the X direction, and the direction perpendicular to the Z direction and the X direction ( Figure 2 In the example, the direction perpendicular to the paper is set as the Y direction. In addition, a direction along the X direction ( Figure 1 In the example of right direction) is set as direction X1, and another direction along the X direction ( Figure 1 In the example, the left direction) is set as direction X2, and a direction along the Y direction ( Figure 1 In the example, the direction toward the side of the paper) is set as direction Y1, and the other direction along the Y direction ( Figure 1 In the example, the direction toward the near front side of the paper) is set as direction Y2, one direction along the Z direction (the direction from the glass laminate 10 toward the display panel 3a) is set as direction Z1, and the other direction along the Z direction (the direction from the display panel 3a toward the glass laminate 10) is set as direction Z2.

[0035] (Display unit)

[0036] In the first embodiment, a display panel 3a for displaying an image is provided as the irradiation unit 3. The display panel 3a is a device having multiple pixels and displaying an image by individually controlling the irradiation of light from each pixel. Examples of the display panel 3a include a liquid crystal display panel and an organic EL (Electro Luminescence) panel. Since the display panel 3a emits light from the surface facing the Z2 side, the surface of the display panel 3a facing the Z2 side is appropriately referred to as the display surface 3A for displaying an image.

[0037] (Glass laminate)

[0038] The glass laminate 10 is provided on the display surface 3A of the display panel 3a, covering the display surface 3A. Figure 2As shown, the glass laminate 10 includes a glass base 20, a functional layer 30, and a colored layer 40. The colored layer 40, the glass base 20, and the functional layer 30 are sequentially stacked on the glass laminate 10, facing in the direction Z2. In this embodiment, the functional layer 30 is the outermost layer on the Z2-facing side of the glass laminate 10. Therefore, the surface of the functional layer 30 facing in the Z2 direction constitutes the surface 10A of the glass laminate 10 facing in the Z2 direction. In this embodiment, the surface 10A of the glass laminate 10 is the surface exposed to the outside.

[0039] (Glass substrate)

[0040] The glass base 20 is a glass member having a first principal surface 20A facing the Z2 side and a second principal surface 20B facing the Z1 side.

[0041] exist Figure 2 In the example shown, the glass substrate 20 is flat, but the present invention is not limited thereto. For example, the glass substrate 20 may be curved or may have a complex three-dimensional curved surface having one or more curved or zigzag portions. The glass substrate 20 may be curved by any method. For example, a flat plate-shaped glass substrate 20 may be heated and formed to thereby bend the glass substrate 20.

[0042] The thickness of the glass substrate 20 is preferably 0.3 mm to 5.0 mm, more preferably 0.8 mm to 3.0 mm, and even more preferably 1.0 mm to 2.5 mm. By adjusting the thickness within this range, the glass substrate 20 can achieve both lightweight and high strength, thereby providing a cover material for a display device with enhanced design. The thickness of the glass substrate 20 refers to the distance in the normal direction between the first principal surface 20A and the second principal surface 20B.

[0043] The glass substrate 20 is transparent (capable of transmitting visible light) glass. The glass substrate 20 can be formed of general glass. For example, the glass substrate 20 can use alkali-free glass, soda-lime glass, soda-lime silicate glass, aluminosilicate glass, borosilicate glass, lithium aluminosilicate glass, borosilicate glass, etc. In addition, when used in the glass laminate 10, aluminosilicate glass and lithium aluminosilicate glass are preferably used as the glass substrate 20. Even if the thickness is thin, it is easy to introduce large stress through strengthening treatment to obtain high-strength glass. The glass substrate 20 is preferably strengthened, for example, by chemical strengthening treatment. This chemical strengthening treatment is usually performed by immersing the glass substrate 20 formed into a predetermined shape in a molten salt containing an alkali metal.

[0044] (Functional layer)

[0045] The functional layer 30 is provided on the first main surface 20A of the glass substrate 20. The functional layer 30 comprises at least one selected from an anti-glare layer, an anti-reflection layer, and an anti-fouling layer. It should be noted that when the functional layer 30 comprises two or more of the anti-glare layer, the anti-reflection layer, and the anti-fouling layer, the layers are preferably stacked in the Z direction. The order of stacking the layers in the Z direction can be arbitrary, but when the functional layer comprises an anti-glare layer, an anti-reflection layer, and an anti-fouling layer, the anti-glare layer, the anti-reflection layer, and the anti-fouling layer are preferably stacked in this order in the Z direction.

[0046] The anti-glare layer is a layer that imparts anti-glare properties to the glass laminate 10. The anti-glare layer can be a layer having a concave-convex shape. The concave-convex shape can be formed directly on the first main surface 20A of the glass substrate 20, or it can be formed by a layer composed of a material different from the glass substrate 20. The surface roughness (root mean square roughness, RMS) of the concave-convex shape is preferably 15nm to 1000nm, more preferably 10nm to 500nm. It should be noted that the anti-glare layer can be realized by using a concave-convex shape imparted by performing an anti-glare treatment and an etching treatment on the first main surface 20A of the glass substrate 20. In addition, a coating film in which particles with an arbitrary refractive index are dispersed can be used on the first main surface 20A of the glass substrate 20, or a concave-convex shape can be formed on the main surface of a laminated transparent resin film and realized by using the concave-convex shape.

[0047] An antireflection layer is a layer that suppresses light reflection. In addition to reducing the reflectivity of the glass laminate 10 and reducing glare caused by reflected light, the antireflection layer also improves visibility when used in a display device. The composition of the antireflection layer is not particularly limited as long as it can suppress light reflection. For example, it can be a layer consisting of alternating layers of high refractive index layers with a refractive index of 1.9 or higher at a wavelength of 550 nm and low refractive index layers with a refractive index of 1.6 or lower at a wavelength of 550 nm.

[0048] The antifouling layer is a layer that has the function of making dirt less noticeable, and can inhibit the adhesion of various dirt such as fingerprints, sweat, and dust. From the perspective of the characteristics of the antifouling layer, the antifouling layer is preferably formed on the outermost surface of the glass laminate 10 facing the Z2 side. For example, the antifouling layer is composed of a fluorinated organic compound (a compound having a fluorinated organic group) that can impart antifouling properties, water repellency, and oil repellency. Examples of the fluorinated organic compound include fluorinated organosilicon compounds.

[0049] (Coloring layer)

[0050] The colored layer 40 is formed on the second main surface 20B of the glass substrate 20. The colored layer 40 has a lower visible light transmittance than the glass substrate 20. More specifically, the visible light transmittance in the region of the colored layer 40 where the holes 46 (described later) are not formed is lower than the visible light transmittance of the glass substrate 20. In the first embodiment, the colored layer 40 is preferably formed over an area larger than the display panel 3a and, for example, may be formed over the entire second main surface 20B of the glass substrate 20.

[0051] As described above, the colored layer 40 is located on the second principal surface 20B of the glass substrate 20, so it can be said that the glass substrate 20 is provided on the colored layer 40. Thus, the colored layer 40 can be protected by the glass substrate 20, thereby improving scratch resistance. Furthermore, by providing the glass substrate 20 on the colored layer 40, light from the display panel 3a is visible through the interface between the first principal surface 20A of the glass substrate 20 and the functional layer 30, thereby also improving seamlessness.

[0052] The colored layer 40 is formed, for example, by printing ink. While the printing method is not particularly limited, preferred methods include inkjet printing, screen printing, and transfer printing. The ink used is not particularly limited. Inorganic inks containing ceramic calcined bodies and organic inks containing colorants such as dyes and pigments and organic resins can be used. In the transfer printing method, for example, an adhesive layer may be provided between the colored layer 40 and the glass substrate 20.

[0053] The thickness of the colored layer 40 is preferably 3 μm to 50 μm, more preferably 3 μm to 30 μm, and even more preferably 5 μm to 20 μm. A thickness of 3 μm or greater for the colored layer 40 can prevent light from the display panel 3 a from being transmitted through areas other than the aperture 46 described later. A thickness of 50 μm or less for the colored layer 40 can prevent the viewing angle from being narrowed.

[0054] The colored layer 40 preferably includes a light-shielding layer 42 and a design layer 44. The light-shielding layer 42 and the design layer 44 are arranged in this order facing the direction Z2. In other words, the light-shielding layer 42 is provided at a position farther from the second main surface 20B of the glass substrate 20 than the design layer 44 (closer to the direction Z1 than the design layer 44).

[0055] That is, the colored layer preferably includes a design layer and a light-shielding layer, wherein the light-shielding layer is located farther from the second main surface than the design layer.

[0056] The light-shielding layer 42 blocks visible light and has a lower visible light transmittance than the design layer 44. The light-shielding layer 42 is, for example, black. The light-shielding layer 42 preferably has a transmittance (external transmittance) of 940 nm wavelength light (infrared light) of 80% or greater, more preferably 90% or greater, and even more preferably 95% or greater. With such a high infrared transmittance, the glass laminate 10 can also be suitably used as a cover material for infrared sensors, for example.

[0057] In addition, the infrared transmittance can be measured by, for example, a glass substrate transmittance / reflectance meter (manufactured by LambdaVision, trade name: LV-RTM).

[0058] The design layer 44 is a layer with a lower visible light transmittance than the glass substrate 20. The design layer 44 is used to impart design to the device 2. The design layer 44 can have any pattern, such as a wood grain or marble pattern. If the design layer 44 has a pattern, it can also be said that the absorption waveform of the visible light range varies at different locations on the design layer 44. However, the design layer 44 is not limited to having a pattern; the entire area can also be formed of any single color.

[0059] (hole)

[0060] Figure 3 1 is a schematic plan view of the colored layer 40 in the glass laminate 10 of the first embodiment. A plurality of holes 46 are formed in the colored layer 40. Figure 2 As shown, the hole 46 penetrates the coloring layer 40 in the Z direction, in other words, is formed from the surface 40A of the coloring layer 40 facing the Z2 side to the surface 40B facing the Z1 side. Figure 3 As shown, the shape of the hole 46 viewed from the Z direction is circular, but the shape is not limited thereto and may be any shape, for example, a polygonal shape, an elliptical shape, etc. In addition, the number of holes 46 may also be arbitrary.

[0061] The aperture D of the hole 46 is preferably 40 μm or less, more preferably 30 μm or less, further preferably 10 μm to 30 μm, and even more preferably 20 μm or more and less than 30 μm. By having the aperture D of the hole 46 within this range, it is possible to prevent the hole 46 from being visible when light from the display panel 3a is not irradiated, and to allow light from the display panel 3a to be appropriately transmitted and visible when light from the display panel 3a is irradiated. Furthermore, by having the aperture D of the hole 46 within this range, it is possible to prevent the image from being blurred due to moiré fringes and the like from being visible, thereby improving image clarity.

[0062] In addition, when the hole 46 is circular, the hole diameter D of the hole 46 may refer to the diameter, and when the hole 46 is not circular, it may refer to the longest distance between two points on the outer circumference of the hole 46.

[0063] Figure 2 In the embodiment, each hole 46 formed in the coloring layer 40 preferably has a small difference between the aperture (aperture D) at one end (surface 40A) of the coloring layer 40 and the aperture (aperture D) at the other end (surface 40B). In other words, it is preferred that the hole 46 is not conical. By making the hole 46 not conical, the pattern and the displayed image can be more clearly viewed. In more detail, if the hole 46 is a conical shape with the aperture becoming smaller toward the viewer side, it appears that the design layer overlaps with the transmitted light from the display panel, and the image tends to become blurred. If the hole 46 is a conical shape with the aperture becoming larger toward the viewer side, the area of ​​the design layer becomes smaller relative to the light-shielding layer, and the design is not easy to be viewed. Here, the fact that the difference between the aperture at one end (surface 40A) and the aperture at the other end (surface 40B) is small can be confirmed, for example, by the following method.

[0064] The pore shape is measured using a laser microscope. The ratio of the pore diameter at one end (surface 40A) of the colored layer 40 to the pore diameter at the other end (surface 40B) is calculated. When the ratio of the smaller pore diameter is 1, the difference in pore diameter is determined to be small if it is 1.2 times or less. The pore diameter ratio is more preferably 1.1 times or less. Pore measurement is preferably performed at any 10 points.

[0065] In the glass laminate, the ratio of the pore diameter at one end of the colored layer in the thickness direction to the pore diameter at the other end of at least one of the plurality of pores is preferably 1.2 times or less, with the smaller pore diameter being 1.

[0066] In the present embodiment, no member is provided in the hole 46 , but the present invention is not limited thereto, and a member that transmits visible light may be provided in the hole 46 .

[0067] (Pore Formation Area)

[0068] Here, if Figure 3 As shown, the area where the holes 46 are formed in the entire surface 40A of the colored layer 40 when viewed from the Z direction is referred to as the hole-forming area AR. The hole-forming area AR can also be said to include the area of ​​the surface 10A of the glass laminate 10 that overlaps with the holes 46 when viewed from the Z direction. More specifically, the hole-forming area AR is an area that includes the holes 46 (the area that overlaps with the holes 46 when viewed from the Z direction) and the area other than the holes 46 (the area that does not overlap with the holes 46 when viewed from the Z direction). The area of ​​the entire surface 40A, excluding the hole-forming area AR, is composed solely of areas where the holes 46 are not present.

[0069] Furthermore, if Figure 3As shown in FIG. 1 , if the outermost holes 46 when viewed from the Z direction are holes 46A, the hole forming area AR is the area surrounded by the holes 46A. A hole 46A is a hole that has no other holes 46 formed within a predetermined distance range outside itself. The predetermined distance here refers to a length greater than the distance P described later. That is, for example, in Figure 3 The hole 46A located most toward the X1 side is a hole 46 in which no other hole 46 is formed within a distance P (within 40 μm in the example of this embodiment) toward the X1 side. The predetermined distance is preferably 0.5 mm or more, more preferably 1 mm or more.

[0070] When observed from the Z direction, the area of ​​the hole-forming region AR is preferably larger than the display surface 3A of the display panel 3a. Furthermore, when observed from the Z direction, it is preferred that the hole-forming region AR overlaps with the entire area of ​​the display surface 3A and has an area larger than the display surface 3A. By making the hole-forming region AR wider than the display surface 3A, the image of the display panel 3a can be visually recognized in the entire area when the light from the display panel 3a is irradiated. In addition, by making the hole-forming region AR wider than the display surface 3A, the seamlessness in the display area will not be impaired even if the transmittance of the hole-forming region AR is increased. More specifically, for example, the entire surface visible to the driver can be made the hole-forming region AR. In addition, for example, the hole-forming region AR can be connected to the non-forming region (the region where no holes are formed) on the outside of the surface visible to the driver in a manner that gradually changes the hole interval (that is, the distance P described later is gradually lengthened toward the non-forming region).

[0071] In the first embodiment, it is preferable that the glass laminate is a cover glass of a display device, the display panel is provided on the second main surface side, and the area of ​​the hole formation region is larger than the area of ​​the display panel.

[0072] The visible light transmittance of the aperture-forming region AR is 5% or greater, and in particular, in Embodiment 1, is preferably 15% to 40%. The visible light transmittance of the aperture-forming region AR refers to the average transmittance of the aperture-forming region AR for light with a wavelength of 550 nm. This visible light transmittance allows sufficient light from the display panel 3a to be transmitted to a level sufficient to read the image information projected by the display panel 3a. Furthermore, when light from the display panel 3a is not irradiated, the colored layer 40 can be appropriately viewed. Furthermore, when the display panel 3a and surrounding wiring are shielded, the design layer 40 can be viewed, allowing the design pattern to be viewed if included.

[0073] The average transmittance of visible light in the hole-forming area AR can be measured as follows. With a light source in contact with the surface 10A of the glass laminate 10, light of a wavelength of 550 nm is irradiated from the light source toward the surface 10A, and the intensity of the light that passes through the glass laminate 10 and is emitted from the surface 10B is measured. Then, the ratio of the intensity of the emitted light to the intensity of the irradiated light (intensity of the emitted light / intensity of the irradiated light) is calculated as the transmittance of visible light in the area (unit area) irradiated with light. When measuring the average transmittance of visible light in the hole-forming area AR, a plurality of unit areas are set throughout the entire area within the hole-forming area AR, and the transmittance of each unit area is measured by the above-mentioned method. Then, the average value of the transmittance of each unit area set throughout the entire area of ​​the hole-forming area AR is taken as the average transmittance of the hole-forming area AR.

[0074] In addition, as an apparatus used for measuring the transmittance of visible light, a transmittance / reflectance meter (manufactured by Lambda Vision, trade name: LV-RTM) can be used.

[0075] In the hole-forming region AR, a plurality of holes 46 are formed in a matrix (in the X and Y directions in this example). The distance (interval) P between the centers of adjacent holes 46 in the hole-forming region AR is preferably less than 40 μm, preferably 25 μm to 35 μm, and more preferably 30 μm to 35 μm. By having the distance P within this range, the colored layer 40 can be viewed when not illuminated by light from the display panel 3a. Furthermore, by having the distance P within this range, when illuminated by light from the display panel 3a, the pattern of the colored layer 40 can be prevented from overlapping with the image and being visible (improving design retention).

[0076] Here, as the center of the hole 46 , the center of gravity of the hole 46 can be used.

[0077] The aperture ratio of the aperture-forming region AR is preferably 25% or greater, more preferably 25% to 45%, and even more preferably 30% to 40%. When the aperture ratio is within this range, light from the display panel 3a can be appropriately transmitted, and the colored layer 40 can be appropriately visible when no light from the display panel 3a is irradiated. Furthermore, when the aperture ratio is within this range, a decrease in design retention can be suppressed.

[0078] The aperture ratio refers to the ratio of the total area of ​​the holes 46 in the hole forming region AR to the area (total area) of the entire formation region AR (total area of ​​the holes 46 / total area of ​​the hole forming region AR).

[0079] (Preferred shape of hole)

[0080] Figure 4 and Figure 5is a schematic diagram for explaining a preferred shape of a hole. Figure 4 As shown, the longest of the straight lines connecting two points on the periphery of the hole-forming region AR is designated as straight line L1. Furthermore, a straight line passing through the midpoint of straight line L1 and inclined 45 degrees counterclockwise relative to straight line L1 is designated as straight line L2. Furthermore, a straight line passing through the midpoint of straight line L1 and inclined 45 degrees clockwise relative to straight line L1 is designated as straight line L3. Furthermore, among the holes 46 within the hole-forming region AR, those that overlap with at least one of straight lines L1, L2, and L3 when viewed in the Z direction are designated as holes 46B.

[0081] Here, the hole 46B that is closest to a true circle among the holes 46B is designated as the first hole. The shape closest to a true circle can be identified by the following method. For a particular hole 46B, the line segment connecting the center of gravity of the hole 46B and two arbitrary points on the outer circumference is designated as the hole diameter D. Within the hole 46B, the difference between the maximum and minimum values ​​of the hole diameter D is designated as the circularity. Among the multiple holes 46B, the hole 46B with the smallest circularity is designated as the first hole.

[0082] On the other hand, the hole 46B having the highest circularity among the holes 46B is designated as the second hole. The second hole can be said to be a hole whose shape is deformed and deviates from a true circle. Figure 5 This is an example of a schematic diagram showing only the extraction hole 46B. Figure 5 In the example of FIG, hole 46B1 is the first hole, and hole 46B2 is the second hole.

[0083] In this case, the difference in roundness between the first hole and the second hole is preferably 20 μm or less, more preferably 10 μm or less, and even more preferably 5 μm or less. Since the difference in roundness between the first hole and the second hole is so small, deformation of the shapes of the holes 46 is minimized, and light from the display panel 3a can be emitted uniformly across the entire area.

[0084] That is, in a glass laminate, when the line segment connecting the center of gravity of the hole and any two points on the outer circumference is set as the hole diameter, when the difference between the maximum and minimum values ​​of the hole diameter is set as the true roundness, when the hole with the smallest true roundness among the multiple holes is set as the first hole, and the hole with the largest true roundness among the multiple holes is set as the second hole, the difference between the true roundness of the first hole and the true roundness of the second hole is preferably less than 20 μm.

[0085] In addition, it is preferable that the longest line of each hole 46B passing through the center of the hole 46B and two points on the periphery points in the same direction. Figure 5In the example shown, the longest line of each hole 46B is oriented in a direction that is tilted 45 degrees counterclockwise relative to the direction X. By aligning the longest lines, uniformity within the hole-forming area AR is improved. It should be noted that the "aligned" direction of the longest lines is not limited to being strictly the same, and also includes the longest lines of the holes 46B having a deviation of 30 degrees or less from each other.

[0086] (Pattern reflectivity)

[0087] The pattern reflectance of the colored layer in the glass laminate is preferably 7% to 15%, and the pattern reflectance is defined by the following formula.

[0088] (Pattern reflectivity) = (double-sided light reflectivity on the first main surface side of the glass laminate) - (single-sided light reflectivity on the first main surface side of the glass base)

[0089] As a measurement of the double-sided light reflectance of the glass laminate and the single-sided light reflectance of the glass substrate, a spectrophotometer (for example, Konica Minolta's spectrophotometer CM-26d) can be used to measure the spectral reflectance based on JIS Z8722 (2009) in a measurement diameter of 3 mm and SCI mode as the double-sided light reflectance and single-sided light reflectance.

[0090] The double-sided visual reflectance of the glass laminate can be measured by placing the first main surface 10A side of the glass laminate 10 in contact with a spectrocolorimeter with a light receiving portion directed upward.

[0091] The single-sided light reflectance of the first principal surface of the glass substrate can be measured using a spectrophotometer on the first principal surface 10A after providing a light-absorbing layer on the second principal surface 10B of the glass laminate 10. For example, a protective film of Kukiri Micro (layer structure: protective film / adhesive layer / black ink / PET) manufactured by Tomogawa Paper Co., Ltd. can be peeled off and attached as the light-absorbing layer.

[0092] The pattern reflectance can be adjusted by controlling the pattern, hole diameter, hole spacing, and aperture ratio. A pattern reflectance of 7% or more is preferred because it makes the colored layer 40 easily visible when no light from the display panel 3a is irradiated.

[0093] On the other hand, when the pattern reflectance is 15% or less, it is possible to suppress the pattern of the colored layer 40 from being overlapped with an image and being visible when irradiated with light from the display panel 3 a , thereby improving the design retention.

[0094] The pattern reflectivity can be adjusted by controlling the pattern, hole diameter, hole spacing and controlling the aperture ratio.

[0095] (Method for producing glass laminate)

[0096] Next, a method for manufacturing the glass laminate 10 described above will be described. This method includes: preparing a glass substrate 20 having a first principal surface and a second principal surface; forming a functional layer 30 comprising at least one selected from an anti-glare layer, an anti-reflection layer, and an anti-fouling layer on the first principal surface 20A of the glass substrate 20; and forming a colored layer 40 including an aperture-forming region AR having a plurality of apertures 46 on the second principal surface 20B of the glass substrate 20; wherein the aperture-forming region AR has a visible light transmittance of 5% or greater.

[0097] The hole 46 in the colored layer 40 may be formed by any method, and the hole 46 may be formed by irradiating the colored layer 40 with laser light.

[0098] Furthermore, when the glass base 20 is bent, the glass base 20 may be bent by heat-molding the glass base 20 .

[0099] The coloring layer 40 may be formed by any method, and may be formed by a transfer decoration method.

[0100] A more detailed example of the manufacturing method will be described below.

[0101] In this example, a glass substrate 20 is prepared in which a functional layer 30 is laminated on a first main surface 20A. In this case, the glass substrate 20 is preliminarily bent into a predetermined shape (three-dimensional shape) and then subjected to a chemical strengthening treatment.

[0102] Next, a colored layer 40 is formed on the second main surface 20B of the prepared glass substrate 20. An inkjet method can be used as a method for forming the colored layer 40. The inkjet method involves ejecting tiny droplets of liquid ink from a nozzle in a pulsed pattern to form a predetermined pattern on the second main surface 20B. Specifically, the glass substrate 20 is positioned with the nozzle's origin as a reference. Based on commands from a control device, the nozzle is moved approximately parallel to the second main surface 20B of the glass substrate 20 while ejecting tiny droplets of ink. This continuously forms dots of ink, forming the colored layer 40 in a predetermined pattern.

[0103] The inkjet method generally forms a pattern while moving the nozzle linearly in one direction. The thickness of the colored layer 40 can be adjusted by controlling the amount of ink ejected from the nozzle and the interval between ejections. To thicken the layer, simply increase the amount or narrow the interval. To thin the layer, simply reduce the amount or widen the interval. The ink is then dried and fired to solidify, forming the colored layer 40. The order in which the layers are formed is not limited to this. The functional layer 30 may be formed on the first main surface 20A of the glass substrate 20 after the colored layer 40 is formed on the second main surface 20B of the glass substrate 20.

[0104] Next, laser processing is performed by irradiating the colored layer 40 with laser light to remove a portion of the colored layer 40, thereby forming the hole 46. The glass laminate 10 is thus manufactured. Any laser irradiation device can be used for irradiating the colored layer 40, and the laser irradiation conditions can be arbitrary. For example, the laser wavelength is preferably 500 to 1100 nm, the laser irradiation mode is preferably pulsed oscillation, and the pulse width of the pulsed oscillation is preferably 1 ps to 100 ns. Furthermore, the laser light can be irradiated directly onto the colored layer 40 from the second principal surface 20B side, or from the first principal surface 20A side through the glass. Preferably, the laser light is irradiated directly onto the colored layer 40 from the second principal surface 20B side. This reduces the laser irradiation energy required to remove the colored layer 40, thereby reducing damage to the glass.

[0105] (Example of transfer decoration)

[0106] In the above example, the method of forming the colored layer 40 by the inkjet method has been described, but the present invention is not limited thereto and the colored layer 40 may be formed by the screen printing method or the transfer decoration method. Figure 6 and Figure 7 Schematic cross-section showing the steps of forming a colored layer by transfer decoration. Figure 6 and Figure 7 The functional layer 30 stacked on the glass substrate 20 is omitted.

[0107] In the transfer decoration method, the transfer sheet 100 having the colored layer 40 is brought into close contact with the glass substrate 20 under heating conditions, thereby transferring the colored layer 40 to the glass substrate 20. Figure 6 As shown, the transfer sheet 100 is composed of a stacked transfer substrate (film) 101, a coloring layer 40, and an adhesive layer 50. The transfer substrate 101 is formed of a resin material, etc., and supports the coloring layer 40 and the adhesive layer 50. The transfer substrate 101 can be formed to a thickness of 20μm to 100μm. The coloring layer 40 of this embodiment is formed in a planar shape of the transferred pattern and is supported on the transfer substrate 101. The adhesive layer 50 is a layer for bonding the coloring layer 40 to the glass substrate 20, and is formed in the same shape as the coloring layer 40. The adhesive layer 50 can be formed to a thickness of 1μm to 10μm. It should be noted that in Figure 6 In the example, the transfer sheet 100 is described as having the adhesive layer 50 in advance, but it may also be configured without the adhesive layer 50. In this case, for example, an adhesive ink may be used as the colored layer 40, or an adhesive may be additionally applied to the surface of the colored layer 40.

[0108] like Figure 6As shown, the glass substrate 20 and the transfer sheet 100 are arranged so that the second main surface 20B of the glass substrate 20 faces the adhesive layer 50 of the transfer sheet 100. Next, the transfer sheet 100 (transfer substrate 101) is softened by heating. The heating method can be, for example, infrared rays, superheated steam, or a hot plate.

[0109] In this state, if the space between the glass substrate 20 and the transfer sheet 100 is decompressed to a substantially vacuum state, the softened transfer sheet 100 is shaped by the pressure difference and comes into close contact with the second main surface 20B of the glass substrate 20. At this time, since the adhesive layer 50 of the transfer sheet 100 faces the second main surface 20B of the glass substrate 20, the transfer sheet 100 is bonded to the second main surface 20B of the glass substrate 20 via the adhesive layer 50.

[0110] Finally, if Figure 7 As shown, by peeling the transfer base material 101 of the transfer sheet 100 from the glass substrate 20 , the adhesive layer 50 and the colored layer 40 remain on the second main surface 20B, and the colored layer 40 can be transferred to the second main surface 20B.

[0111] (Effect)

[0112] As described above, the glass laminate 10 according to the first embodiment has a hole-forming region AR having a visible light transmittance of 5% or more formed in the colored layer 40 on the second main surface 20B of the glass base 20. Forming such a hole-forming region AR in the colored layer 40 allows light from the display panel 3a to be appropriately transmitted, and allows the colored layer 40 to be appropriately visible when the light from the display panel 3a is not irradiated.

[0113] Furthermore, by covering the colored layer 40 with the glass substrate 20, the colored layer 40 can be protected by the glass substrate 20, thereby improving scratch resistance. Furthermore, by providing the glass substrate 20 on the colored layer 40, light from the display panel 3a can be seen through the interface between the first main surface 20A of the glass substrate 20 and the functional layer, thereby also improving seamlessness.

[0114] Furthermore, in the first embodiment, since the hole-forming region AR is wider than the display surface 3A of the display panel 3a, the entire area of ​​the display surface 3A can be formed as the hole-forming region AR. Therefore, according to the first embodiment, when irradiated with light from the display panel 3a, the image can be properly viewed over the entire area of ​​the display surface 3A, and when not irradiated with light from the display panel 3a, the color layer 40 can be properly viewed over the entire area while maintaining a seamless appearance.

[0115] (Second embodiment)

[0116] Next, the second embodiment is described. The second embodiment differs from the first embodiment in that a point light source, namely a light source 3b, is used as the irradiation unit 3 and in a portion of the configuration of the hole forming region AR. In the second embodiment, description of portions common to the first embodiment will be omitted.

[0117] In the second embodiment, the glass laminate preferably has a center spacing of 50 μm to 100 μm between adjacent holes in the hole forming region, and an opening ratio (a ratio of the total area of ​​the plurality of holes to the total area of ​​the hole forming region) of 5% to 15%.

[0118] In the second embodiment, the display device preferably includes the glass laminate and a light source portion provided on the second main surface side so as to face the hole forming region.

[0119] Figure 8 is a schematic cross-sectional view of the device of the second embodiment, Figure 9 Schematic diagram of a top view of a colored layer in a glass laminate according to the second embodiment. Figure 8 and Figure 9 As shown, the glass laminate 10 of the second embodiment includes an opening area AR1 where the colored layer 40 is not formed and a colored area AR2 where the colored layer 40 is formed. That is, in the second embodiment, the colored layer 40 is formed on a portion of the second main surface 20B of the glass base 20.

[0120] (Opening area)

[0121] The opening area AR1 is an area where the colored layer 40 is not formed in the entire area of ​​the glass laminate 10 when viewed from the Z direction (an area that does not overlap with the colored layer 40 when viewed from the Z direction). Figure 8 As shown, the display panel 3a is provided at a position closer to the Z1 direction side than the colored layer 40 and overlapping with the opening area AR1 when viewed from the Z direction. Light from the display panel 3a is emitted to the outside through the opening area AR1, so it can be said that the image of the display panel 3a is displayed in the opening area AR1. It should be noted that the size, shape, and number of the opening areas AR1 can be arbitrary. When multiple opening areas AR1 are provided, it is preferable to provide a display panel 3a in each opening area AR1.

[0122] (colored area)

[0123] The colored region AR2 refers to the region where the colored layer 40 is formed throughout the entire glass laminate 10 when viewed from the Z direction (the region overlapping the colored layer 40 when viewed from the Z direction). In the example of this embodiment, the colored region AR2 is formed so as to surround the opening region AR1 when viewed from the Z direction. In other words, it is formed around the opening region AR1. It should be noted that the size, shape, and number of the colored regions AR2 can be arbitrary. Furthermore, the positional relationship between the opening region AR1 and the colored regions AR2, as well as the size relationship between the opening region AR1 and the colored regions AR2, can also be arbitrary.

[0124] Thus, in the second embodiment, the opening region AR1 and the colored region AR2 are formed, but the present invention is not limited thereto, and the opening region AR1 may not be formed. In other words, the colored layer 40 may be formed over the entire second main surface 20B of the glass substrate 20. If the opening region AR1 is not formed, the display panel 3a that overlaps with the opening region AR1 may not be provided.

[0125] (Pore Formation Area)

[0126] In the second embodiment, the hole-forming region AR is located within the colored region AR2. That is, at least a portion of the entire colored region AR2 serves as the hole-forming region AR. The hole-forming region AR is preferably formed in a portion of the colored region AR2.

[0127] like Figure 8 As shown, a light source unit 3b, serving as the irradiation unit 3, is provided at a position closer to the Z1 direction side than the colored layer 40 and overlapping with the aperture-forming region AR when viewed from the Z direction. The light source unit 3b has fewer pixels (light sources) than the display panel 3a that displays an image, and does not control each pixel to display an image. The light source unit 3b preferably has three or fewer light sources, but may have only one. Furthermore, the light irradiated from the light source unit 3b may be a single color whose color does not change.

[0128] In the second embodiment, it is preferable to set the position of the hole 46 so that the outline of the hole forming region AR becomes a predetermined shape. Figure 9 In the example shown, the holes 46 are formed so that the hole-forming area AR is square. However, this is not limiting and the holes 46 may be formed in any shape, such as an arrow. By forming the holes 46 in this predetermined shape, the light from the light source unit 3b is irradiated, and the shape of the hole-forming area AR can be visually recognized. When the glass laminate of this embodiment is used as cover glass for a display device installed in a vehicle, the predetermined shape can be used as a driver's guide, such as an arrow or a refueling or air conditioning symbol.

[0129] The hole forming region AR can be formed at any position in the colored region AR2, and the number of hole forming regions AR in the colored region AR2 can be arbitrary. When a plurality of hole forming regions AR are provided, it is preferable to provide a light source unit 3b in each hole forming region AR.

[0130] The visible light transmittance of the aperture-forming region AR is 5% or greater, and particularly in the second embodiment, is preferably 5% to 15%. As in the first embodiment, the visible light transmittance of the aperture-forming region AR refers to the average transmittance of the aperture-forming region AR for light with a wavelength of 550 nm. By ensuring that the visible light transmittance is within this range, light from the light source 3b is sufficiently transmitted to allow for proper visualization of the desired shape during illumination, while allowing for proper visualization of the colored layer 40 when light from the light source 3b is not irradiated. This allows for shielding of internal structures and improves seamlessness.

[0131] In the second embodiment, the distance (interval) P between the centers of adjacent holes 46 in the hole-forming region AR is preferably 50 μm to 100 μm, more preferably 50 μm to 80 μm, and more preferably 50 μm to 70 μm. When the distance P is within this range, seamlessness can be improved and a decrease in design residual properties can be suppressed.

[0132] In the second embodiment, the aperture ratio of the aperture-forming region AR is preferably 5% to 15%, more preferably 10% to 15%. When the aperture ratio is within this range, light from the display panel 3a can be appropriately transmitted, and the colored layer 4 can be appropriately visible when no light from the display panel 3a is irradiated. Furthermore, when the aperture ratio is within this range, a decrease in design retention can be suppressed.

[0133] In the second embodiment, the ratio of the distance P between adjacent holes 46 to the thickness of the glass base 20 (distance P / thickness) is preferably 10 to 50, more preferably 10 to 30. When the ratio is within this range, seamlessness can be improved.

[0134] (Effect)

[0135] As described above, in the glass laminate 10 according to the second embodiment, similarly to the first embodiment, the colored layer 40 is covered with the glass base 20 , thereby improving the scratch resistance and the seamlessness.

[0136] In addition, in the second embodiment, since the hole forming area AR is formed in a manner overlapping with the light source portion 3b, when light is irradiated, the light from the light source portion 3b can be fully transmitted to the extent that the prescribed shape can be appropriately visualized, and the colored layer 40 can be appropriately visualized when the light from the light source portion 3b is not irradiated, thereby shielding the internal structure and improving seamlessness.

[0137] (Third embodiment)

[0138] Next, the third embodiment will be described. The third embodiment differs from the first embodiment in that a photosensor 3c is provided in place of the irradiation unit 3, and in that the aperture forming region AR partially comprises the aperture forming region AR. In the third embodiment, description of portions of the configuration common to the first embodiment will be omitted.

[0139] In the third embodiment, the glass laminate preferably has a center spacing of 50 μm to 100 μm between adjacent holes in the hole forming region, and an opening ratio (a ratio of the total area of ​​the plurality of holes to the total area of ​​the hole forming region) of 5% to 10%.

[0140] In the third embodiment, the device preferably includes the glass laminate and a photosensor provided on the second main surface side so as to face the hole forming region.

[0141] Figure 10 : is a schematic cross-sectional view of the device of the third embodiment. Figure 10 As shown, in the third embodiment, a light sensor 3c is provided at a position closer to the Z1 direction side than the colored layer 40 and overlapping with the hole-forming region AR when viewed from the Z direction. The light sensor 3c is a sensor that detects light and can, for example, detect the intensity of the irradiated light. In the third embodiment, light (e.g., external light) irradiated onto the surface 10A of the glass laminate 10 passes through the holes 46 in the hole-forming region AR and enters the light sensor 3c, where it detects the incident light. In other words, the device 2 of the third embodiment is not a light-emitting display device like the first or second embodiments, but rather a light-detecting device.

[0142] As in the second embodiment, the hole forming region AR in the third embodiment is formed in at least a portion of the entire colored region AR2 (region where the colored layer 40 is formed), preferably in a portion of the colored region AR2 .

[0143] The visible light transmittance of the aperture-forming region AR is 5% or greater, and in the third embodiment, is particularly preferably 5% to 10%. As in the first embodiment, the visible light transmittance of the aperture-forming region AR refers to the average transmittance of the aperture-forming region AR for light with a wavelength of 550 nm. When the visible light transmittance falls within this range, sufficient light to cause the optical sensor 3 c to react can be transmitted.

[0144] In the third embodiment, the distance (interval) P between the centers of adjacent holes 46 in the hole-forming region AR is preferably 50 μm to 100 μm, more preferably 60 μm to 90 μm. When the distance P is within this range, seamlessness can be improved and light sufficient to react to the optical sensor 3 c can be transmitted.

[0145] In the third embodiment, the aperture ratio of the hole forming region AR is preferably 5% to 10%, more preferably 5% to 8%. When the aperture ratio is within this range, light sufficient to react to the optical sensor 3c can be transmitted.

[0146] In the third embodiment, the ratio of the distance P between adjacent holes 46 to the thickness of the glass base 20 (distance P / thickness) is preferably 10 to 50, more preferably 10 to 30. When the ratio is within this range, seamlessness can be improved.

[0147] As described above, in the glass laminate 10 in the third embodiment, similarly to the first embodiment, the colored layer 40 is covered with the glass base 20 , thereby improving the scratch resistance and the seamlessness.

[0148] Furthermore, in the third embodiment, since the hole formation region AR is formed so as to overlap with the optical sensor 3 c , light can be appropriately transmitted to the optical sensor 3 c .

[0149] It should be noted that the third embodiment is applicable to the second embodiment. Specifically, the hole-forming region AR of the third embodiment can be formed in the colored region AR2 of the second embodiment, and the optical sensor 3c can be provided on the Z1 side of the hole-forming region AR. In this case, the hole-forming region AR and the light source unit 3b described in the second embodiment may be provided, or they may not be provided.

[0150] (Effect)

[0151] As described above, the glass laminate 10 according to the first embodiment of the present disclosure comprises: a glass substrate 20 having a first principal surface 20A and a second principal surface 20B; a functional layer 30 disposed on the first principal surface 20A side of the glass substrate 20 and comprising at least one selected from an anti-glare layer, an anti-reflection layer, and an anti-fouling layer; and a colored layer 40 disposed on the second principal surface 20B side of the glass substrate 20 and comprising an aperture-forming region AR having a plurality of apertures 46. The visible light transmittance of the aperture-forming region AR is 5% or greater. According to the present disclosure, by covering the colored layer 40 with the glass substrate 20, scratch resistance and seamlessness can be improved.

[0152] The glass laminate 10 of the second embodiment of the present disclosure is the glass laminate 10 of the first embodiment, wherein the colored layer 40 includes a design layer 44 and a light-shielding layer 42. The light-shielding layer 42 is located on a side farther from the second main surface 20B than the design layer 44 (toward Z1). By providing the light-shielding layer 42 and the design layer 44, the light-shielding layer 42 can suppress light from being transmitted through a region where the holes 46 are not formed, while the design layer 44 allows the desired design to be viewed when no light is irradiated.

[0153] The glass laminate 10 of the third embodiment of the present disclosure is the glass laminate 10 of the first or second embodiment, wherein the spacing (distance P) between the centers of adjacent holes 46 in the hole-forming region AR is preferably less than 40 μm, and the ratio of the total area of ​​the plurality of holes 46 to the total area of ​​the hole-forming region AR, i.e., the aperture ratio, is 25% or greater. By keeping the aperture ratio and distance P within this range, a decrease in design residual properties can be suppressed.

[0154] The glass laminate 10 of the fourth embodiment of the present disclosure is the glass laminate 10 of the third embodiment, and is preferably a cover glass for a display device, wherein the display panel 3a is provided on the second main surface 20B side, and the area of ​​the hole-forming region AR is larger than the area of ​​the display panel 3a (display surface 3A). According to the present disclosure, in a configuration in which the hole-forming region AR is wider than the display surface 3A, a decrease in design residual properties can be suppressed.

[0155] The glass laminate 10 of the fifth embodiment of the present disclosure is the glass laminate 10 of any one of the first to fourth embodiments, wherein the spacing between the centers of adjacent holes 46 in the hole-forming region AR is preferably 50 μm to 100 μm, and the ratio of the total area of ​​the plurality of holes 46 to the total area of ​​the hole-forming region AR, i.e., the aperture ratio, is 5% to 15%. By having the aperture ratio and distance P within this range, a reduction in design residual properties can be suppressed, particularly in a configuration including the light source unit 3 b described in the second embodiment.

[0156] The glass laminate 10 according to the sixth embodiment of the present disclosure is the glass laminate 10 according to any one of the first to fifth embodiments, wherein the spacing between the centers of adjacent holes 46 in the hole-forming region AR is preferably 50 μm to 100 μm, and the ratio of the total area of ​​the plurality of holes 46 to the total area of ​​the hole-forming region AR, i.e., the aperture ratio, is 5% to 10%. When the aperture ratio and the distance P are within this range, light can be appropriately transmitted to the light sensor 3 c, particularly in a configuration in which the light sensor 3 c shown in the third embodiment is provided.

[0157] The glass laminate 10 of the seventh embodiment of the present disclosure is the glass laminate 10 of any one of the first to sixth embodiments, and preferably, the pores 46 have a pore diameter D of 30 μm or less. When the pore diameter D is within this range, visual recognition of the pores 46 can be suppressed.

[0158] The glass laminate 10 of the eighth embodiment of the present disclosure is the glass laminate 10 of any one of the first to seventh embodiments, and preferably, the glass base 20 is curved. According to the present disclosure, the curved glass base 20 can improve scratch resistance and seamlessness.

[0159] The glass laminate 10 of the ninth embodiment of the present disclosure is the glass laminate 10 of any one of the first to eighth embodiments, wherein, for at least one of the plurality of holes 46, the ratio of the hole diameter at one end portion in the thickness direction of the colored layer 40 to the hole diameter at the other end portion is preferably 1.2 times or less, with the smaller hole diameter being 1. Since the at least one hole 46 does not taper toward the direction Z2, blurring of the image can be suppressed, and difficulty in recognizing the design can be suppressed.

[0160] The glass laminate 10 of the tenth embodiment of the present disclosure is the glass laminate 10 of any one of the first to ninth embodiments, wherein, when the diameter D of the hole 46B is defined as a line segment connecting the center of gravity of the hole 46B and any two points on the outer circumference, and the difference between the maximum and minimum values ​​of the diameter D is defined as the roundness, the hole with the smallest roundness among the holes 46B is defined as the first hole, and the hole with the largest roundness among the holes 46B is defined as the second hole, the difference between the roundness of the first hole and the roundness of the second hole is preferably 20 μm or less. By minimizing the difference in roundness between the first hole and the second hole, deformation of the shapes of the holes 46 can be minimized, and light from the display panel 3 a can be emitted uniformly across the entire area.

[0161] The glass laminate 10 of the eleventh embodiment of the present disclosure is the glass laminate 10 of any one of the first to tenth embodiments, wherein the thickness of the colored layer 40 is preferably 3 μm to 50 μm. The thickness of the colored layer 40 within this range can suppress light from the display panel 3 a from being transmitted through areas other than the aperture 46 , thereby suppressing a decrease in the viewing angle.

[0162] The device 2 (display device) according to the twelfth aspect of the present disclosure includes the glass laminate 10 according to any one of the first to eleventh aspects, and an irradiation unit 3 provided on the second principal surface 20B side (facing the Z1 side) of the glass laminate 10 and irradiating light toward the glass laminate 10. According to the present disclosure, scratch resistance can be improved, and seamlessness can be enhanced.

[0163] The device 2 (display device) of the thirteenth embodiment of the present disclosure preferably includes the glass laminate 10 of the third embodiment and a display panel 3a, wherein the display panel 3a is provided on the second main surface 20B side opposite the hole-forming region AR, and the area of ​​the hole-forming region AR is larger than the area of ​​the display panel 3a. According to the present disclosure, a decrease in design residual properties can be suppressed.

[0164] The device 2 (display device) of the fourteenth aspect of the present disclosure preferably includes the glass laminate 10 of the fifth aspect and the light source portion 3b provided on the second main surface 20B side facing the hole forming region AR.

[0165] The device 2 (display device) of the fifteenth embodiment of the present disclosure preferably includes the glass laminate 10 of the sixth embodiment and a photosensor 3c disposed on the second main surface 20B side facing the hole-forming region AR. According to the present disclosure, seamlessness can be improved while allowing light sufficient to react to the photosensor 3c to pass through.

[0166] The method for manufacturing a glass laminate 10 according to the sixteenth embodiment of the present disclosure includes: preparing a glass substrate 20 having a first principal surface 20A and a second principal surface 20B; forming a functional layer 30 comprising at least one selected from an antiglare layer, an antireflection layer, and an antifouling layer on the first principal surface 20A side of the glass substrate 20; and forming a colored layer 40 including an aperture-forming region AR having a plurality of apertures 46 on the second principal surface 20B side of the glass substrate 20; the aperture-forming region AR having a visible light transmittance of 5% or greater. According to the present disclosure, both scratch resistance and seamlessness can be improved.

[0167] The method for producing the glass laminate 10 according to the seventeenth aspect of the present disclosure is the method according to the sixteenth aspect, and preferably forms the holes 46 by irradiating the colored layer 40 with laser light. According to the present disclosure, the holes 46 can be appropriately formed using laser light.

[0168] The manufacturing method of the glass laminate 10 of the 18th aspect of the present disclosure is the manufacturing method of the 16th aspect or the 17th aspect, and preferably, the glass base 20 is heat-molded to bend the glass base 20. According to the present disclosure, the glass base 20 can be appropriately bent.

[0169] The method for producing the glass laminate 10 according to the 19th aspect of the present disclosure is the method according to any one of the 16th to 18th aspects, and preferably forms the colored layer 40 by a transfer decoration method. According to the present disclosure, the colored layer 40 can be appropriately formed.

[0170] (Example)

[0171] Next, examples will be described. However, the embodiments may be modified as long as the effects of the present invention are exhibited.

[0172] (First Test)

[0173] In the first test, a glass laminate of Example A as an embodiment and a glass laminate of Example B as a comparative example were prepared. The glass laminate of Example A was formed by providing a colored layer on the second main surface 10B of the glass substrate, and forming an anti-glare layer, an anti-reflection layer, and an anti-fouling layer on the first main surface 10A in sequence from the side close to the first main surface 10A. The glass laminate of Example B was formed by configuring a colored layer on the first main surface 10A of the glass substrate (with the colored layer as the outermost surface).

[0174] In Example A, a flat glass substrate (Dragon Trail, manufactured by AGC Corporation) measuring 100 mm in length, 100 mm in width, and 1.1 mm in thickness was prepared. A colored layer was formed on the second main surface of the glass substrate by inkjet printing. Laser irradiation was then performed under the conditions described in Experiment 2, described below, to form multiple holes in the colored layer. The spacing between the holes (distance P), the hole diameter (hole diameter D), the aperture ratio of the hole-forming region, and the visible light transmittance of the hole-forming region were 55 μm, 20 μm, 12%, and 10%, respectively. The visible light transmittance was measured using the method described in the above-mentioned embodiment.

[0175] In Example B, a glass laminate was produced by the same method as in Example A except that a colored layer was disposed on the glass substrate.

[0176] (evaluate)

[0177] The glass laminates of Examples A and B were subjected to pencil hardness measurement (JIS K5600 (1999)) as an evaluation of the outermost surface scratch resistance and seamlessness evaluation. The seamlessness evaluation was performed using a spectrophotometer (CM-26d manufactured by Konica Minolta Inc.).

[0178] The hardness of the outermost surface of the glass laminate of Example A was 4H, and its seamlessness was higher than that of the glass laminate of Example B. On the other hand, the hardness of the outermost surface of the glass laminate of Example B was 2B, and its seamlessness was lower than that of Example A. Therefore, it can be seen that the scratch resistance and seamlessness can be improved by arranging a glass substrate on the outermost surface.

[0179] (Test 2)

[0180] Table 1 shows the conditions and evaluation results of each example in the second test.

[0181] [Table 1]

[0182]

[0183] (Example 1)

[0184] In Example 1, a flat glass substrate (Dragon Trail manufactured by AGC Corporation) with a length of 100 mm, a width of 100 mm, and a thickness of 1.1 mm was prepared. A colored layer was bonded to the first main surface of the glass substrate using a roll laminator to obtain a glass laminate. The colored layer in Example 1 was formed by repeatedly pad printing and drying a colorant containing an acrylic resin in a base polymer onto a PET (polyethylene terephthalate) film (Lumirror #75-S10 manufactured by Toray) to print five layers of brown base layers and two layers of pattern portions. The thickness of the colored layer was 12 μm. In the glass laminate of Example 1, the outermost surface was the colored layer.

[0185] Note that, in Example 1, no pores were formed in the colored layer.

[0186] (Examples 2 to 4, 10 to 12)

[0187] In Examples 2-4 and 10-12, a functional layer consisting of an antiglare layer, an antireflection layer, and an antifouling layer was laminated in this order from the glass substrate side onto the first main surface of the same glass substrate as in Example 1. Subsequently, a colored layer was formed by printing TABK-6020, a Toray IJ ink, onto the second main surface of the glass substrate. The colored layer had a thickness of 5 μm. In the glass laminates of Examples 2-4 and 10-12, the outermost surface was the functional layer.

[0188] In Examples 2 to 4 and 10 to 12, a plurality of holes were formed by irradiating the colored layer with laser light under the following conditions to obtain a glass laminate. An irradiation portion was arranged on the second main surface side of the glass laminate to obtain a display device.

[0189] Processing head: galvanometer scanner

[0190] Lens: f163mm

[0191] Transmitter name: TruMicro5000

[0192] Laser wavelength: 515nm

[0193] Pulse width: 8ps

[0194] In each example, the case where holes are formed over the entire surface of the glass laminate is recorded in Table 1 as "hole forming area: entire surface", and the case where holes are formed only in a part of the glass laminate is recorded in Table 1 as "hole forming area: part".

[0195] The interval between holes (distance P), hole diameter (hole diameter D), aperture ratio of the hole-forming region, and visible light transmittance of the hole-forming region in each example are shown in Table 1. The visible light transmittance was measured by the method described in the above embodiment.

[0196] The first and second holes were extracted using the method described in the above embodiment, and the pore diameter difference between the first and second holes was measured. A difference of 20 μm or less was recorded in Table 1 as "Pore shape deformation: no," and a difference of more than 20 μm was recorded in Table 1 as "Pore shape deformation: yes."

[0197] In addition, the types of the irradiation parts arranged on the second main surface side of the glass laminate are shown in Table 1. The simple light source in Table 1 refers to a single white LED lamp, and the display panel refers to a liquid crystal display panel.

[0198] (Examples 5 to 9, 13)

[0199] In Examples 5-9 and 13, a functional layer consisting of an antiglare layer, an antireflection layer, and an antifouling layer was applied to the first main surface of the same glass substrate as in Example 1, laminated in this order from the glass substrate side. A colored layer was then formed on the second main surface of the glass substrate. The colored layers in Examples 5-9 and 13 were created by repeatedly pad printing and drying a colorant containing an acrylic resin as a base polymer onto a glass substrate, resulting in five brown base layers and two patterned layers. The resulting colored layers have a wood-grained design.

[0200] In Examples 5 to 9 and 13, except for the above-mentioned points and the points shown in Table 1, the same method as in Examples 2 to 4 and 10 to 12 was carried out to obtain glass laminates and display devices.

[0201] However, in Example 13, a curved substrate having a single curved portion (curve having a single curved axis) was used as the glass substrate.

[0202] (Example 14)

[0203] In Example 14, a functional layer comprising an antiglare layer, an antireflection layer, and an antifouling layer was stacked in this order from the glass substrate side on the first main surface of the same glass substrate as in Example 1. A colored layer was then formed on the second main surface of the glass substrate using the same method as in Example 1.

[0204] In Example 14, a glass laminate and a display device were obtained by the same method as Examples 2 to 4 and 10 to 12, except for the above-mentioned points and the points shown in Table 1. In Example 14, a curved glass substrate having a single curved portion (curved with a single bending axis) was used as the glass substrate.

[0205] (Example 15)

[0206] In Example 15, a functional layer consisting of an anti-glare layer, an anti-reflection layer, and an anti-fouling layer was applied to the first main surface of the same glass substrate as in Example 1. A decorative colored layer was then transferred to the second main surface of the glass substrate using a vacuum forming apparatus. The colored layer in Example 15 was created by repeatedly screen-printing a colorant containing an acrylic resin as a base polymer onto a PP (polypropylene) film and then drying it. This resulted in five layers of brown base layers and two layers of patterned portions, creating a wood-grained design.

[0207] In Example 15, a glass laminate and a display device were obtained by the same method as Examples 2 to 4 and 10 to 12, except for the above-mentioned points and the points shown in Table 1. In Example 15, a curved glass substrate having a double-curved portion (curved with two bending axes) was used as the glass substrate.

[0208] (evaluate)

[0209] The hardness of the outermost surface of the glass laminate of each example was measured by the same method as in Test 1. The results of the hardness measurement are shown in Table 1.

[0210] The display devices of Examples 2 to 15 were evaluated for pattern reflectance, seamlessness, and hole visibility when not displaying (when not irradiated with light from the irradiation portion), and for design retention, clarity, and display uniformity when displaying (when irradiated with light from the irradiation portion). The results are shown in Table 1.

[0211] The pattern reflectance was measured by the method described in the manual. As a spectrophotometer, a Konica Minolta spectrophotometer CM-26d was used.

[0212] For seamlessness, ΔE values ​​were measured using a Konica Minolta Spectrocolorimeter CM-26d and visually observed in a dark room. Values ​​less than 1.5 were rated as ◎, values ​​between 1.5 and less than 3.0 were rated as ◯, and values ​​of 3.0 or greater were rated as △.

[0213] The visibility of the holes was visually observed in a dark room. A case where the holes could not be visually recognized was marked as 0, and a case where the holes could be visually recognized was marked as x.

[0214] The design retention was evaluated by visual observation during display on the display panel 3a, with a value of 0 indicating that the design could not be visually observed, a value of Δ indicating that the design could be slightly visually observed, and a value of × indicating that the design could be visually observed.

[0215] The clarity was evaluated by visual observation during display on the display panel 3a, with no blur being marked as 0, slightly blurry as △, and blurry as ×.

[0216] The display uniformity was evaluated by visual observation during display on the display panel 3a, with a value of 0 indicating that the image was correctly displayed and a value of × indicating that the image was not correctly displayed.

[0217] Comparing Example 1 as a comparative example with Examples 2 to 15 as examples of the embodiment shows that Examples 2 to 15 have higher hardness and that the placement of a glass substrate on the outermost surface improves scratch resistance. Furthermore, as shown in the first test, placement of a glass substrate on the outermost surface also improves seamlessness.

[0218] While the embodiments of the present invention have been described above, the embodiments are not limited by the contents of the embodiments. Furthermore, the aforementioned constituent elements include those readily apparent to those skilled in the art, substantially identical constituent elements, and so-called equivalent constituent elements. Furthermore, the aforementioned constituent elements may be appropriately combined. Furthermore, various omissions, substitutions, or modifications of the constituent elements may be made without departing from the scope of the aforementioned embodiments.

[0219] Industrial applicability

[0220] According to the present invention, a glass laminate, a display device, a device, and a method for producing a glass laminate that can improve scratch resistance and seamlessness can be provided.

[0221] While the present invention has been described in detail and with reference to specific embodiments, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the present invention.

[0222] This application is based on the Japanese patent application (Japanese Patent Application No. 2023-016958) filed on February 7, 2023, the contents of which are incorporated herein by reference.

[0223] Explanation of symbols

[0224] 1st steering shaft

[0225] 2Device (display device)

[0226] 3Irradiation part

[0227] 3a display panel

[0228] 3b Light source

[0229] 3C light sensor

[0230] 10Glass laminate

[0231] 20 glass substrate

[0232] 20A 1st main surface

[0233] 20B second main surface

[0234] 30 functional layers

[0235] 40 coloring layers

[0236] 42 light-shielding layer

[0237] 44 Design Floor

[0238] 46 holes

[0239] AR pore formation region

[0240] AR1 opening area

[0241] AR2 coloring area

[0242] 50 bonding layers

[0243] 100 transfer sheets

[0244] 101 Transfer base film

Claims

1. A glass laminate comprising: A glass substrate having a first main surface and a second main surface, a functional layer provided on the first main surface side of the glass substrate and comprising at least one selected from an anti-glare layer, an anti-reflection layer and an anti-fouling layer, and a colored layer provided on the second main surface side of the glass substrate and including a hole-forming region provided with a plurality of holes; The visible light transmittance of the hole-forming region is 5% or more.

2. The glass laminate according to claim 1, wherein The colored layer includes a design layer and a light-shielding layer, and the light-shielding layer is located farther from the second main surface than the design layer.

3. The glass laminate according to claim 1 or 2, wherein The interval between the centers of adjacent holes in the hole forming region is less than 40 μm, and the ratio of the total area of ​​the plurality of holes to the total area of ​​the hole forming region, that is, the opening ratio, is 25% or more.

4. The glass laminate according to claim 3, wherein The glass laminate is a cover glass of a display device, a display panel is provided on the second main surface side, and an area of ​​the hole forming region is larger than an area of ​​the display panel.

5. The glass laminate according to claim 1 or 2, wherein The interval between the centers of adjacent holes in the hole forming region is 50 μm to 100 μm, and the opening ratio, which is a ratio of the total area of ​​the plurality of holes to the total area of ​​the hole forming region, is 5% to 15%.

6. The glass laminate according to claim 1 or 2, wherein The interval between the centers of adjacent holes in the hole forming region is 50 μm to 100 μm, and the opening ratio, which is a ratio of the total area of ​​the plurality of holes to the total area of ​​the hole forming region, is 5% to 10%.

7. The glass laminate according to claim 1 or 2, wherein The pores have a diameter of 30 μm or less.

8. The glass laminate according to claim 1 or 2, wherein The glass substrate is curved.

9. The glass laminate according to claim 1 or 2, wherein: For at least one of the plurality of holes, a ratio of a hole diameter at one end portion in the thickness direction of the colored layer to a hole diameter at the other end portion is 1.2 times or less, with the smaller hole diameter being 1.

10. The glass laminate according to claim 1 or 2, wherein When the line segment connecting the center of gravity of the hole and any two points on the outer circumference is defined as the hole diameter, and the difference between the maximum and minimum values ​​of the hole diameter is defined as the roundness, The hole with the smallest roundness among the plurality of holes is set as the first hole, When the hole with the largest roundness among the plurality of holes is set as the second hole, A difference in roundness between the first hole and the second hole is 20 μm or less.

11. The glass laminate according to claim 1 or 2, wherein The thickness of the coloring layer is 3 μm to 50 μm.

12. The glass laminate according to claim 1 or 2, wherein The pattern reflectivity of the colored layer is 7% to 15%, The pattern reflectivity is defined by the following formula: (Pattern reflectivity)=(double-surface light reflectivity on the first main surface side of the glass laminate)−(single-surface light reflectivity on the first main surface side of the glass base).

13. A display device comprising: The glass laminate according to claim 1 or 2, and An irradiation unit is provided on the second main surface side of the glass laminate and irradiates light toward the glass laminate.

14. A display device comprising: The glass laminate according to claim 3, and a display panel provided on the second main surface side so as to face the hole forming region; An area of ​​the hole forming region is larger than an area of ​​the display panel.

15. A display device comprising: The glass laminate according to claim 5, and The light source portion is provided on the second main surface side so as to face the hole forming region.

16. A device comprising: The glass laminate according to claim 6, and A photosensor is provided on the second main surface side so as to face the hole forming region.

17. A method for manufacturing a glass laminate, comprising: a step of preparing a glass substrate having a first main surface and a second main surface, forming a functional layer including at least one selected from an anti-glare layer, an anti-reflection layer, and an anti-fouling layer on the first main surface side of the glass substrate, and forming a colored layer including a hole-forming region having a plurality of holes on the second main surface side of the glass substrate; The visible light transmittance of the hole-forming region is 5% or more.

18. The method for producing a glass laminate according to claim 17, wherein: The holes are formed by irradiating the colored layer with laser light.

19. The method for producing a glass laminate according to claim 17 or 18, wherein: The glass substrate is heated and formed to be bent.

20. The method for producing a glass laminate according to claim 17 or 18, wherein: The colored layer is formed by a transfer decoration method.

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