Glass plate for vehicle and method for manufacturing glass plate for vehicle

Abstract

To provide a glass plate for a vehicle to which an optical element can be appropriately attached.SOLUTION: A glass plate for a vehicle according to one aspect of the present disclosure includes a glass plate 10, an optical element 30 formed of a transparent adhesive provided on a vehicle-interior-side surface of the glass plate 10, and a plurality of side wall parts 21 _ 1 to 21 _ 4 arranged on side surfaces of the optical element 30. Among the plurality of side wall parts 21 _ 1 to 21 _ 4, the side wall part 21 _ 1 disposed on the side where light is introduced from the light source 40 is transparent, and the light introduced from the light source 40 to the side wall part 21 _ 1 is configured to be introducible into the glass plate 10 via the optical element 30.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a glass plate for a vehicle and a method for manufacturing a glass plate for a vehicle. [Background technology]

[0002] In recent years, a technology has been developed in which light is introduced into the interior of a vehicle glass plate from an end side of the vehicle glass plate using a light source such as a light-emitting diode (LED), and the light is scattered on the surface or inside the vehicle glass plate to extract the light to the outside.

[0003] Patent Document 1 discloses a technique for attaching an optical element to a glass plate on the inside of a vehicle using an adhesive member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2021 / 198262 Summary of the Invention [Problem to be solved by the invention]

[0005] When introducing light into a glass plate for a vehicle, an optical element is provided on the glass plate for a vehicle, and light emitted from a light source is introduced into the glass plate for a vehicle through the optical element. Patent Document 1 discloses a technique for attaching an optical element to a glass plate using an adhesive member.

[0006] However, when an optical element is provided on the surface of a glass plate, air bubbles may be mixed in at the interface between the glass plate and the optical element. When air bubbles are mixed in at the interface between the glass plate and the optical element, light may not be efficiently introduced from the optical element to the glass plate. Furthermore, when the surface of the glass plate has a curved shape, it is necessary to provide the optical element so as to follow the surface shape of the glass plate.

[0007] In view of the above-mentioned problems, an object of the present disclosure is to provide a glass plate for a vehicle that allows an optical element to be appropriately attached to the glass plate, and a method for manufacturing the glass plate for a vehicle. [Means for solving the problem]

[0008] A glass plate for a vehicle according to one aspect of the present disclosure and a method for manufacturing the glass plate for a vehicle are as follows.

[0009] [1] A glass plate and an optical element made of a transparent adhesive provided on the surface of the glass plate on the inside of the vehicle; a plurality of sidewall portions disposed on side surfaces of the optical element; Among the plurality of side wall portions, a first side wall portion arranged on a side where light is introduced from a light source is transparent, The light introduced from the light source to the first side wall portion is configured to be introduced into the glass plate via the optical element. Vehicle glass panels.

[0010] [2] The glass plate for a vehicle according to [1], wherein the width of the first side wall portion is 1 mm or more and 15 mm or less.

[0011] [3] The glass plate for a vehicle according to [1] or [2], wherein the surface of the optical element opposite to the glass plate is covered with a resin layer or a barrier layer.

[0012] [4] a second side wall portion is provided on a side surface of the optical element opposite to the side surface on which the first side wall portion is provided, The height of the second side wall portion is configured to be higher than the height of the first side wall portion based on the surface of the glass plate on the vehicle interior side. The glass plate for a vehicle according to any one of [1] to [3].

[0013] [5] The vehicle glass plate according to any one of [1] to [4], wherein light introduced from the light source to the top surface of the first side wall portion is reflected by a side surface of the first side wall portion opposite the optical element, and then introduced into the optical element.

[0014] [6] The glass plate for a vehicle according to any one of [1] to [5], wherein the first side wall portion has a wedge-shaped cross section.

[0015] [7] The thickness of the optical element is 0.5 mm or more, The refractive index of the optical element is 1.44 or more and 1.60 or less. The glass plate for a vehicle according to any one of [1] to [6].

[0016] [8] The vehicle glass plate according to any one of [1] to [7], wherein the height of the first side wall portion is configured to be higher than the height of the optical element, based on the surface of the glass plate on the vehicle interior side.

[0017] [9] the plurality of side wall portions are frames arranged to surround side surfaces of the optical element, The glass plate for vehicle according to any one of [1] to [8], wherein the frame is adhered to the surface of the glass plate on the vehicle interior side using an adhesive member.

[0018]

[10] the light source is mounted on a circuit board; The circuit board is supported by the first side wall portion. The glass plate for a vehicle according to any one of [1] to [9].

[0019]

[11] a second side wall portion is provided on a side surface of the optical element opposite to the side surface on which the first side wall portion is provided, The second side wall portion is made of a material having a light-blocking property. The glass plate for a vehicle according to any one of [1] to

[10] .

[0020]

[12] an interface where the optical element and the first side wall portion come into contact is inclined at a predetermined angle with respect to the surface of the glass plate facing the interior of the vehicle; a side surface of the first side wall portion opposite to the optical element, the side surface being configured so that light is introduced from the light source; an interface where the optical element and the first side wall portion are in contact with each other and a side surface of the first side wall portion opposite to the optical element are configured to be parallel to each other; The glass plate for a vehicle according to any one of [1] to [4].

[0021]

[13] The glass plate for a vehicle according to any one of [1] to

[12] , wherein the glass plate is a laminated glass including a first glass plate, a second glass plate, and an intermediate adhesive layer disposed between the first glass plate and the second glass plate.

[0022]

[14] The glass plate for a vehicle according to any one of [1] to

[13] , wherein a scattering pattern that scatters light introduced into the glass plate is provided on at least a part of the glass plate.

[0023]

[15] a frame having a plurality of side walls disposed on the surface of the glass plate; pouring an adhesive into the recess surrounded by the frame body, and hardening the poured adhesive to form an optical element made of a transparent adhesive on the surface of the glass plate; Among the side wall portions provided in the frame body, a first side wall portion arranged on the side where light is introduced from the light source is made of a transparent material. A method for manufacturing glass sheets for vehicles.

[0024]

[16] The method for manufacturing a glass plate for a vehicle according to

[15] , wherein the width of the first side wall portion is 1 mm or more and 15 mm or less.

[0025]

[17] The method for manufacturing a glass plate for a vehicle according to

[15] or

[16] , wherein the frame is adhered to the surface of the glass plate using an adhesive member.

[0026]

[18] a first side wall portion is disposed on a surface of the glass plate so as to extend in a first direction along the glass plate; a third side wall portion is disposed so as to extend from one end of the first side wall portion in a second direction intersecting the first direction; and a fourth side wall portion is disposed so as to extend from the other end of the first side wall portion in the second direction; a cover layer disposed on top surfaces of the first side wall portion, the third side wall portion, and the fourth side wall portion; displacing the glass plate so that an opening of a recess formed by the first side wall portion, the third side wall portion, the fourth side wall portion, and the cover layer faces upward, pouring an adhesive into the recess, and hardening the poured adhesive to form an optical element made of a transparent adhesive on the surface of the glass plate; Among the first side wall portion, the third side wall portion, and the fourth side wall portion, the first side wall portion arranged on the side where light is introduced from the light source is made of a transparent member. A method for manufacturing glass sheets for vehicles. [Effects of the Invention]

[0027] The present disclosure provides a glass plate for a vehicle that allows an optical element to be appropriately attached to the glass plate, and a method for manufacturing the glass plate for a vehicle. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a plan view showing an example of a configuration of a glass plate for a vehicle according to an embodiment. [Figure 2] 1 is a cross-sectional view showing an example of the configuration of a glass plate for a vehicle according to an embodiment. [Figure 3] FIG. 2 is a plan view illustrating a method for manufacturing a glass plate for a vehicle according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 5]FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 6] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 7] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 8] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 9] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 10] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 11] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 12] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 13] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 14] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 15] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 16] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 17] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 18] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the embodiment. [Figure 19] FIG. 10 is a plan view illustrating another method for manufacturing a glass plate for a vehicle according to an embodiment. [Figure 20] FIG. 10 is a cross-sectional view illustrating another method for manufacturing a glass plate for a vehicle according to an embodiment. [Figure 21] FIG. 10 is a cross-sectional view illustrating another method for manufacturing a glass plate for a vehicle according to an embodiment. [Figure 22] 22 is a cross-sectional view showing an example of the configuration of a glass plate for a vehicle formed by the manufacturing method shown in FIGS. 19 to 21. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0029] Hereinafter, an embodiment will be described with reference to the drawings. FIG. 1 is a plan view showing an example of the configuration of a vehicle glass plate according to an embodiment. FIG. 2 is a cross-sectional view showing the example of the configuration of a vehicle glass plate according to the embodiment, taken along the cutting line II-II in FIG. 1. As shown in FIGS. 1 and 2, a vehicle glass plate 1 according to this embodiment includes a glass plate 10, an optical element 30 made of a transparent adhesive and provided on the surface of the glass plate 10 on the vehicle interior side (the positive side in the z-axis direction), and a plurality of side walls 21_1 to 21_4 arranged on the side of the optical element 30. In this embodiment, of the plurality of side walls 21_1 to 21_4, the side wall 21_1 (first side wall) arranged on the side where light from the light source 40 is introduced is transparent. As shown in FIG. 2, light 71 introduced from the light source 40 to the side wall 21_1 is introduced into the glass plate 10 via the optical element 30. The plurality of side walls 21_1 to 21_4 are arranged to surround the side surfaces of the optical element 30, and these constitute a frame 20.

[0030] 1 and 2 show, as an example, a configuration example in which the frame body 20, the optical element 30, and the light source 40 are provided at the end of the vehicle glass plate 1 on the negative side in the x-axis direction. However, in this embodiment, the frame body 20, the optical element 30, and the light source 40 may also be provided at the end of the vehicle glass plate 1 on the positive side in the x-axis direction. Furthermore, the frame body 20, the optical element 30, and the light source 40 may also be provided at the end of the vehicle glass plate 1 on the positive side in the y-axis direction or on the negative side in the y-axis direction.

[0031] The vehicle glass plate 1 according to this embodiment can be used, for example, as a vehicle window. Examples of vehicle windows include roof glass, windshields, side windows, quarter windows, and rear windows. The vehicle glass plate 1 is configured to use a light source 40, such as an LED, to introduce light 71 into the interior of the vehicle glass plate from an end side (the negative side in the x-axis direction) of the vehicle glass plate 1, and to scatter the light on the surface or inside the vehicle glass plate to extract light 72 to the outside. When such a vehicle glass plate 1 is used as a roof glass, the ceiling portion of the vehicle can be illuminated in a predetermined color, thereby improving the interior design of the vehicle. The vehicle glass plate 1 can also be used as an information notification device for vehicle occupants and people outside the vehicle. The information to be notified includes, for example, danger information and information regarding the vehicle condition, but is not limited thereto. The light 72 extracted to the outside of the vehicle glass plate 1 can be used for various purposes depending on the location of the vehicle glass plate 1 installed in the vehicle.

[0032] The vehicle glass plate 1 shown in Fig. 2 includes a laminated glass as a glass plate 10. The laminated glass includes a first glass plate 11, a second glass plate 12, an intermediate adhesive layer 13 disposed between the first glass plate 11 and the second glass plate 12, and a scattering pattern 15. Note that the glass plate 10 used in this embodiment is not limited to a laminated glass, and may be a single glass plate.

[0033] The vehicle glass plate 1 according to this embodiment may have a flat shape or a curved shape. It may also have a shape including both flat and curved surfaces. The first glass plate 11 and the second glass plate 12 may each be a flat plate or a curved plate. The curved plate may have a single-curved shape curved in one direction, or a three-dimensional shape curved in two or more directions. The three-dimensional shape may be, for example, a complex-curved shape curved in two orthogonal directions. In the following example, a case will be described in which both the first glass plate 11 and the second glass plate 12 are flat plates, but the same explanation applies when at least one of them is a curved plate.

[0034] The outer edge shapes of the first glass sheet 11 and the second glass sheet 12 in a plan view may be any shape, but are preferably rectangular, trapezoidal, or triangular, for example. Fig. 1 shows an example configuration in which the glass sheet 10 is rectangular. For example, the first glass sheet 11 is disposed on the inside of the vehicle (positive side in the z-axis direction), and the second glass sheet 12 is disposed on the outside of the vehicle (negative side in the z-axis direction).

[0035] The first and second glass plates 11, 12 can be made of, for example, transparent inorganic glass. For example, soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, quartz glass, etc. may also be used for the first and second glass plates 11, 12. The first and second glass plates 11, 12 are manufactured using, for example, the float method, the fusion method, etc., but are not limited to these manufacturing methods.

[0036] The thickness of each of the first and second glass sheets 11, 12 is, for example, 0.1 mm to 10 mm, and preferably 0.3 mm to 4.0 mm from the viewpoint of resistance to stone chipping. The thicknesses of the first and second glass sheets 11, 12 may be the same as or different from each other. For example, the thickness of the second glass sheet 12 disposed on the vehicle exterior side may be thicker than the thickness of the first glass sheet 11 disposed on the vehicle interior side. Increasing the thickness of the second glass sheet 12 disposed on the vehicle exterior side in this way improves the strength of the vehicle glass sheet 1 against objects flying toward the vehicle glass sheet 1.

[0037] The intermediate adhesive layer 13 is disposed so as to be sandwiched between the first glass plate 11 and the second glass plate 12. The thickness of the intermediate adhesive layer 13 is not particularly limited, but is preferably, for example, 2.4 mm or less. The thickness of the intermediate adhesive layer 13 is preferably 0.38 mm or more, more preferably 0.50 mm or more, and even more preferably 0.76 mm or more. By setting the thickness of the intermediate adhesive layer 13 within this range, the transparency of the vehicle glass plate can be ensured and the weight of the vehicle glass plate can be prevented from becoming excessively large.

[0038] The intermediate adhesive layer 13 can be made of a material containing, for example, polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), cycloolefin polymer, urethane resin, ionomer resin, etc. Among these, PVB and EVA are preferably used.

[0039] As shown in FIG. 2 , at least a portion of the glass plate 10 is provided with a scattering pattern 15 that scatters light 71 introduced into the glass plate 10. That is, a portion of the light 71 introduced from the light source 40 into the first glass plate 11 via the side wall portion 21_1 and the optical element 30 is scattered by the scattering pattern 15, and the scattered light 72 is extracted to the outside of the first glass plate 11. The scattering pattern 15 may be provided at a position other than the position shown in FIG. 2 . For example, the scattering pattern may be provided on the surface of the second glass plate 12 facing the intermediate adhesive layer 13. The scattering pattern 15 can be formed, for example, by physically or chemically etching the first glass plate 11 to roughen the surface of the first glass plate 11, or by printing a scattering material containing inorganic or organic fine particles on the surface of the first glass plate 11. Alternatively, the scattering pattern 15 may be formed by printing a scattering material containing inorganic or organic fine particles on the intermediate adhesive layer 13.

[0040] As shown in FIG. 2, in this embodiment, an optical element 30 is provided on the surface of the glass plate 10 on the vehicle interior side (positive side in the z-axis direction). The optical element 30 is made of a transparent adhesive. The material constituting the optical element 30 will be described later. A frame 20 is provided on the side of the optical element 30. The frame 20 has a plurality of side walls 21_1 to 21_4 (see FIG. 1) arranged so as to surround the side of the optical element 30. The frame 20 (side walls 21_1 to 21_4) can be made of a transparent resin such as glass, acrylic resin, polycarbonate resin, polystyrene resin, acrylonitrile styrene resin, or silicone resin. The side walls 21_1 to 21_4 constituting the frame 20 may be formed integrally.

[0041] The frame body 20 (side wall portions 21_1 to 21_4) is adhered to the interior surface of the glass plate 10 (first glass plate 11) using an adhesive member 22. The adhesive member 22 may be made of various adhesives such as acrylic resin, nylon resin, polyester resin, silicone resin, epoxy resin, and urethane resin, but is not limited to these. The use of the adhesive member 22 is optional.

[0042] Furthermore, in this embodiment, of the side walls 21_1 to 21_4 included in the frame 20, the side wall 21_1 arranged on the side where light 71 is introduced from the light source 40 (the negative side in the x-axis direction) is made transparent. Therefore, the light 71 introduced from the light source 40 to the side wall 21_1 is introduced into the first glass plate 11 via the optical element 30. For example, the width of the side wall 21_1 is preferably 1 mm or more and 15 mm or less, more preferably 1.5 mm or more and 10 mm or less, and even more preferably 2 mm or more and 5 mm or less.

[0043] The thickness of the optical element 30 is preferably 0.5 mm or more, more preferably 0.7 mm or more and 3 mm or less, and even more preferably 1.0 mm or more and 2.0 mm or less. The refractive index of the optical element 30 is preferably 1.44 or more and 1.60 or less, more preferably 1.46 or more and 1.58 or less, even more preferably 1.48 or more and 1.56 or less, and most preferably 1.50 or more and 1.56 or less.

[0044] The visible light transmittance of the optical element 30 is preferably 80% or more, more preferably 90% or more, and even more preferably 99% or more. The haze of the optical element 30 is preferably 20% or less, more preferably 10% or less, and even more preferably 5% or less.

[0045] In the present embodiment, the refractive index of the glass plate 10 (first glass plate 11) is preferably 1.46 to 1.58, more preferably 1.48 to 1.56, and even more preferably 1.49 to 1.55. By setting the refractive index of the first glass plate 11 and the refractive index of the optical element 30 within these ranges, light 71 can be appropriately guided from the optical element 30 to the first glass plate 11.

[0046] FIG. 3 is a plan view for explaining the method for manufacturing a glass plate for a vehicle according to the embodiment, and is a diagram for explaining the details of the method for forming the optical element 30. In FIG.

[0047] In this embodiment, first, a frame 20 having a plurality of side walls 21_1 to 21_4 is placed on the surface of the glass plate 10. When placing the frame 20, the side wall 21_1 placed on the side where light is introduced from the light source 40 is made of a transparent member. The frame 20 (side walls 21_1 to 21_4) may be adhered to the surface of the glass plate 10 using an adhesive member 22 (see FIG. 2). Next, an adhesive is poured into the recess 29 surrounded by the frame 20, and the poured adhesive is cured to form an optical element 30 made of a transparent adhesive on the surface of the glass plate 10.

[0048] In this case, in the present embodiment, the height of the side wall portions 21_1 to 21_4 may be configured to be higher than the height of the optical element 30, with the surface of the glass plate 10 facing the vehicle interior as a reference. In such a configuration, when the adhesive is poured into the recess 29 surrounded by the frame body 20, it is possible to prevent the adhesive from overflowing from the frame body 20.

[0049] In this embodiment, the frame 20 is provided on the surface of the glass plate 10, an adhesive is poured into the recess 29 surrounded by the frame 20, and the poured adhesive is cured to form the optical element 30. Therefore, the optical element 30 can be formed so as to follow the surface shape of the glass plate 10. In particular, when the surface of the glass plate has a curved shape, the method according to this embodiment can be used to form the optical element 30 so as to follow the curved shape of the surface of the glass plate 10.

[0050] Furthermore, when the method according to the present embodiment is used, it is possible to prevent air bubbles from being mixed into the interface between the glass plate 10 and the optical element 30. Therefore, light can be efficiently introduced from the optical element 30 to the glass plate 10. Furthermore, in this embodiment, the contact area between the frame 20 and the glass plate 10, in other words, the contact area between the side wall portions 21_1 to 21_4 and the glass plate 10, can be reduced, thereby reducing the influence of the difference in thermal expansion coefficient between the material constituting the frame 20 and the glass plate 10. This widens the range of materials that can be used for the frame 20. Furthermore, in this embodiment, the optical element 30 is formed using an adhesive, which allows the optical element 30 to be softened. Therefore, the influence of the difference in thermal expansion coefficient between the optical element 30 and the glass plate 10 can be reduced. Furthermore, when a photocuring adhesive is used as the adhesive, the adhesive can be directly irradiated with light such as UV light after pouring into the frame 20, facilitating the manufacture of the optical element 30.

[0051] Next, the materials constituting the optical element 30 will be described in detail. The optical element 30 is made of a transparent adhesive. Examples of such adhesives include optical clear resin (OCR) and optical clear adhesive (OCA), with OCR being preferred. OCR is also known as liquid optical clear adhesive (LOCA). Specifically, acrylate-based, silicone-based, acrylic-modified silicone-based, urethane-based, urethane acrylate-based, epoxy-based, epoxy acrylate-based, acrylamide-based, and methacrylamide-based resin compositions can be used as the adhesive. These adhesives may be used alone or in combination of two or more types. For example, an acrylic resin composition and a silicone resin composition may be used in combination.

[0052] From the viewpoint of the curing method, the adhesive may be a thermosetting, photocuring, or room temperature curing resin. In this embodiment, from the viewpoint of workability and productivity, it is preferable to use a photocuring or room temperature curing adhesive.

[0053] From the viewpoints of optical transparency and heat resistance, photocurable adhesives preferably use resins such as acrylates, urethane acrylates, and epoxy acrylates as their base. The light used for photocuring may be ultraviolet or visible light, and can be generated using, for example, a metal halide UV lamp, an LED lamp, a high-pressure mercury lamp, an electrodeless lamp, or a xenon lamp. Photocurable adhesives may contain a photopolymerization initiator. Examples of photopolymerization initiators include ultraviolet polymerization initiators and visible light polymerization initiators. Examples of ultraviolet polymerization initiators include benzoin-based, benzophenone-based, and acetophenone-based initiators. Examples of visible light polymerization initiators include acylphosphine oxide-based, thioxanthone-based, metallocene-based, quinone-based, and α-aminoalkylphenone-based initiators. Photocurable adhesives may contain a silane coupling agent. Silane coupling agents improve adhesion and adhesive stability, improve heat resistance and moisture resistance, and also improve adhesive reliability even when left under harsh conditions for long periods of time.

[0054] Examples of room temperature curing adhesives include moisture curing adhesives that cure by reacting with moisture in the atmosphere, and reaction curing adhesives that contain at least two types of resin compositions and cure by mixing these resin compositions. Examples of reaction curing adhesives that can be used include two-component curable polyorganosiloxane compositions described in Japanese Patent Nos. 5308564 and 5414931.

[0055] 2, a material harder than the side wall portion 21_2 may be used for the side wall portion 21_1 provided on the side surface on the positive side in the x-axis direction of the optical element 30. In this way, when a hard material is used for the side wall portion 21_1, fine processing or the like can be performed on the light incident surface of the side wall portion 21_1.

[0056] Furthermore, in this embodiment, a material having a light-blocking property may be used for the side wall portion 21_2 provided on the side surface on the positive side in the x-axis direction of the optical element 30. When a material having a light-blocking property is used for the side wall portion 21_2 in this manner, it is possible to prevent the light 71 introduced from the side wall portion 21_1 side from escaping from the side wall portion 21_2 to the outside (the positive side in the x-axis direction), thereby enabling efficient introduction of light from the light source 40 to the glass plate 10. When a material having a light-blocking property is used for the side wall portion 21_2, it is preferable that a material having a light-blocking property is also used for the adhesive member 22 used to bond the side wall portion 21_2 to the surface of the glass plate 10. With this configuration, it is possible to prevent light from leaking from the adhesive member 22.

[0057] Furthermore, in addition to the side wall portion 21_2, the side wall portions 21_3 and 21_4 (see FIG. 1) may also be made of a light-blocking material. That is, by making the side wall portions 21_2 to 21_4 other than the side wall portion 21_1 out of a light-blocking material, light can be more efficiently introduced from the light source 40 to the glass plate 10. For example, silicone resin, urethane resin, rubber, polycarbonate resin, polypropylene resin, etc. can be used as the light-blocking material.

[0058] Next, other configuration examples of the glass plate for a vehicle according to the embodiment will be described with reference to FIGS.

[0059] In this embodiment, as in the vehicle glass plate 1a shown in FIG. 4, a light source 40 having a light-emitting element may be mounted on a circuit board 41. The circuit board 41 may be configured to be supported by the side wall portion 21_1. For example, the circuit board 41 may be adhered to the top surface (the surface on the positive side in the z-axis direction) of the side wall portion 21_1 using an adhesive member. The adhesive member may be made of the above-mentioned materials. In this case, the circuit board 41 may further be adhered to the surface on the positive side in the z-axis direction of the optical element 30.

[0060] In this embodiment, as in the vehicle glass plate 1b shown in Fig. 5, a barrier layer 23 may be provided on the surface of the optical element 30 opposite to the glass plate 10 (the surface on the positive side in the z-axis direction). When the barrier layer 23 is provided on the surface of the optical element 30 in this manner, the optical element 30 can be protected from the external environment, and deterioration of the optical element 30 can be suppressed. The circuit board 41 on which the light source 40 is mounted may be adhered to the barrier layer 23 using an adhesive member 24. The barrier layer 23 may be formed of, for example, a transparent film or the like.

[0061] In this embodiment, as in the vehicle glass plate 1c shown in FIG. 6, a reflective layer 25 may be provided on the surface of the optical element 30 opposite to the glass plate 10 (the surface on the positive side in the z-axis direction). When the reflective layer 25 is provided on the surface of the optical element 30 in this manner, light introduced into the optical element 30 can be prevented from escaping from the surface of the optical element 30 to the outside (the positive side in the z-axis direction), so that light can be efficiently introduced from the light source 40 to the glass plate 10. The circuit board 41 on which the light source 40 is mounted may be bonded to the reflective layer 25 using an adhesive member 24. In addition, in the configuration example shown in FIG. 6, the reflective layer 25 may function as a barrier layer. When the reflective layer 25 functions as a barrier layer in this manner, the optical element 30 can be protected from the external environment, thereby preventing deterioration of the optical element 30.

[0062] In this embodiment, as in a vehicle glass plate 1d shown in FIG. 7, a resin layer 26 may be provided on the surface of the optical element 30 opposite to the glass plate 10 (the surface on the positive side in the z-axis direction). When the resin layer 26 is provided on the surface of the optical element 30 in this manner, the optical element 30 can be protected from the external environment, thereby suppressing deterioration of the optical element 30. A circuit board 41 on which the light source 40 is mounted may be bonded to the resin layer 26 using an adhesive member 24. For example, in the configuration example shown in FIG. 7, the frame body 20 and the resin layer 26 are integrally configured. In other words, the multiple side wall portions 21_1 to 21_4 and the resin layer 26 are integrally configured. In this case, it is preferable to provide an opening in a part of the resin layer 26 so that adhesive can be injected into the frame body 20 during manufacturing of the optical element 30.

[0063] Next, other configuration examples of the vehicle glass plate according to the embodiment will be described with reference to Figs. 8 to 17. In Figs. 8 to 17, modified examples of the side wall portion 21_1 of the frame body 20 will be described. Note that in Fig. 8 and subsequent Figs., the second glass plate 12 and the intermediate adhesive layer 13 are omitted from the illustration in order to simplify the drawings.

[0064] In the configuration example shown in Fig. 8, the side surface 27a on the negative side in the x-axis direction of the side wall portion 21_1 of the frame body 20a is configured to be flat. In the configuration example shown in Fig. 8, the side surface 27a of the side wall portion 21_1 is configured to be perpendicular to the surface of the glass plate 10. The light source 40 is disposed on the negative side in the x-axis direction of the side wall portion 21_1. Light 71 emitted from the light source 40 is obliquely incident on the side surface 27a of the side wall portion 21_1, and then passes through the optical element 30 to be introduced into the glass plate 10.

[0065] 9, the cross-sectional shape of the side wall portion 21_1 of the frame body 20b is configured to be wedge-shaped. That is, the side surface 27b on the negative side in the x-axis direction of the side wall portion 21_1 is configured to be inclined at a predetermined angle with respect to the surface of the glass plate 10. The light source 40 is disposed on the negative side in the x-axis direction of the side wall portion 21_1. Light 71 emitted from the light source 40 is incident on the side surface 27b of the side wall portion 21_1 approximately perpendicularly, and then passes through the optical element 30 to be introduced into the glass plate 10.

[0066] In the configuration example shown in FIG. 10, the side surface 27c on the negative x-axis direction side of the side wall portion 21_1 of the frame body 20c is configured to be a curved surface. The light source 40 is disposed on the negative x-axis direction side of the side wall portion 21_1. Light 71 emitted from the light source 40 is incident on the side surface 27c of the side wall portion 21_1, and then passes through the optical element 30 to be introduced into the glass plate 10. The curved surface may be convex either toward the positive x-axis direction or toward the negative x-axis direction. A collimating curved surface may be formed so that the light introduced from the light source 40 to the glass plate becomes parallel light.

[0067] 11, the cross-sectional shape of the side wall portion 21_1 of the frame body 20d is configured to be wedge-shaped. That is, the top surface 28d of the side wall portion 21_1 on the positive side in the z-axis direction is configured to be oblique with respect to the x-axis direction. The light source 40 is disposed on the negative side in the x-axis direction of the side wall portion 21_1. Light 71 emitted from the light source 40 is incident on the side surface 27d of the side wall portion 21_1, and then passes through the optical element 30 to be introduced into the glass plate 10.

[0068] In the configuration example shown in FIG. 12, the cross-sectional shape of the side wall portion 21_1 of the frame body 20e is configured to be a parallelogram. An interface 35e where the optical element 30 and the side wall portion 21_1 contact each other is inclined at a predetermined angle with respect to the surface of the glass plate 10 facing the vehicle interior side. Furthermore, a side surface 27e on the negative side in the x-axis direction of the side wall portion 21_1 is inclined at a predetermined angle with respect to the surface of the glass plate 10 facing the vehicle interior side. In the configuration example shown in FIG. 12, the interface 35e where the optical element 30 and the side wall portion 21_1 contact each other is configured to be parallel to the side surface 27e of the side wall portion 21_1. The light source 40 is disposed on the negative side in the x-axis direction of the side wall portion 21_1. Light 71 emitted from the light source 40 is incident approximately perpendicularly on the side surface 27e of the side wall portion 21_1, then passes through the optical element 30 and is introduced into the glass plate 10.

[0069] 13, the cross-sectional shape of the side wall portion 21_1 of the frame body 20f is configured to be wedge-shaped. That is, the top surface 28f of the side wall portion 21_1 on the positive side in the z-axis direction is configured to be inclined at a predetermined angle with respect to the x-axis. The light source 40 is disposed on the positive side in the z-axis direction of the side wall portion 21_1. Light 71 emitted from the light source 40 is incident on the top surface 28f of the side wall portion 21_1 approximately perpendicularly, and then passes through the optical element 30 to be introduced into the glass plate 10.

[0070] 14, the cross-sectional shape of the side wall portion 21_1 of the frame body 20g is configured to be wedge-shaped. That is, a side surface 27g on the negative side in the x-axis direction of the side wall portion 21_1 is configured to be inclined at a predetermined angle with respect to the surface of the glass plate 10. The light source 40 is disposed on the positive side in the z-axis direction of the side wall portion 21_1. Light 71 emitted from the light source 40 is configured to be incident on a top surface 28g of the side wall portion 21_1. The light introduced from the light source 40 to the top surface 28g of the side wall portion 21_1 is reflected by the side surface 27g of the side wall portion 21_1, passes through the optical element 30, and is introduced to the glass plate 10.

[0071] 15, a side surface 27h on the negative side in the x-axis direction of a side wall portion 21_1 of a frame body 20h is configured to be a curved surface. The light source 40 is disposed on the positive side in the z-axis direction of the side wall portion 21_1. Light 71 emitted from the light source 40 is configured to be incident on a top surface 28h of the side wall portion 21_1. The light introduced from the light source 40 to the top surface 28h of the side wall portion 21_1 is reflected by the side surface 27h of the side wall portion 21_1, passes through the optical element 30, and is introduced to the glass plate 10.

[0072] 16, the frame 20i is configured so that the top surface 28i (the surface on the positive side in the z-axis direction) of the side wall portion 21_1 is curved. The light source 40 is disposed on the positive side in the z-axis direction of the side wall portion 21_1. Light 71 emitted from the light source 40 is incident on the top surface 28i of the side wall portion 21_1, then passes through the optical element 30 and is introduced into the glass plate 10.

[0073] In the configuration example shown in FIG. 17 , the side wall portion 21_1 of the frame body 20j is configured to have a cavity 45. A circuit board 41 on which a light source 40 is mounted is provided in the cavity 45 of the side wall portion 21_1. The circuit board 41 is supported by the side wall portion 21_1. The cavity 45 of the side wall portion 21_1 may be a cavity 45 that is shielded from the outside, or may be a cavity 45 that is connected to the outside. Light 71 emitted from the light source 40 enters the surface of the side wall portion 21_1 on the positive side in the x-axis direction, and then passes through the optical element 30 and is introduced into the glass plate 10. Note that in the configuration example shown in FIG. 17 , an optical fiber or a light guiding rod may be used as the light source. For example, by arranging the optical fiber or the light guiding rod so that it extends in the y-axis direction, misalignment of the light source can be suppressed.

[0074] FIG. 18 is a cross-sectional view showing another example of the configuration of a vehicle glass plate according to an embodiment. In the configuration example shown in FIG. 18, a case where the glass plate 10 has a curved surface will be described. As shown in FIG. 18, the glass plate 10 is configured so that the negative side in the x-axis direction gradually curves toward the positive side in the z-axis direction. In this case, when the frame body 20k is placed on the glass plate 10, the height of the side wall portion 21_2 is configured to be higher than the height of the side wall portion 21_1, with the surface of the glass plate 10 on the vehicle interior side (positive side in the z-axis direction) as a reference. In other words, the surface of the side wall portion 21_1 on the positive side in the z-axis direction and the surface of the side wall portion 21_2 on the positive side in the z-axis direction are configured to be flush with each other in the x-axis direction. With this configuration, when an adhesive is poured into a recess surrounded by the frame body 20k, it is possible to prevent the adhesive from overflowing from the side wall portion 21_2.

[0075] Next, another method for manufacturing a glass plate for a vehicle according to the present embodiment will be described. Fig. 19 is a plan view illustrating another method for manufacturing a glass plate for a vehicle according to the embodiment. Figs. 20 to 21 are cross-sectional views illustrating another method for manufacturing a glass plate for a vehicle according to the embodiment, taken along the cutting line XX-XX in Fig. 19. The manufacturing method shown in Figs. 19 to 21 can be applied to both a flat glass plate 10 (first glass plate 11) having a flat surface and a curved glass plate, but is particularly useful for manufacturing a glass plate for a vehicle including a glass plate 10 (first glass plate 11) that is a curved plate. Hereinafter, a case where an optical element 30 is formed on a curved plate will be described.

[0076] As shown in the left diagram of FIG. 19 and the upper diagram of FIG. 20, when manufacturing a glass plate for a vehicle, first, a plurality of side wall portions 21_1, 21_3, and 21_4 are arranged on the surface of the glass plate 10. Specifically, on the surface of the glass plate 10, a side wall portion 21_1 (first side wall portion) is arranged so as to extend in the y-axis direction (first direction) of the glass plate 10, a side wall portion 21_3 (third side wall portion) is arranged so as to extend from one end (the end on the positive side in the y-axis direction) of the side wall portion 21_1 to the positive side in the x-axis direction (second direction), and a side wall portion 21_4 (fourth side wall portion) is arranged so as to extend from the other end (the end on the negative side in the y-axis direction) of the side wall portion 21_1 to the positive side in the x-axis direction. The first direction is one of the directions along the surface of the glass plate 10 and may be, for example, the longitudinal direction of the glass plate 10.

[0077] The side wall portions 21_1, 21_3, and 21_4 may be integrally formed, or the plurality of side wall portions 21_1, 21_3, and 21_4 may be connected to one another. The side wall portions 21_1, 21_3, and 21_4 are arranged to form a substantially U-shape in a plan view. When arranging the plurality of side wall portions 21_1, 21_3, and 21_4, the side wall portion 21_1 arranged on the side where light from the light source 40 is introduced is made of a transparent member. The plurality of side wall portions 21_1, 21_3, and 21_4 may be adhered to the surface of the glass plate 10 using an adhesive member 22 (see FIG. 20).

[0078] Next, as shown in the right diagram of FIG. 19 and the bottom diagram of FIG. 20, a cover layer 35 is disposed on the top surfaces (surfaces on the positive side in the z-axis direction) of the sidewalls 21_1, 21_3, and 21_4. For example, the cover layer 35 may be adhered to the top surfaces of the sidewalls 21_1, 21_3, and 21_4 using an adhesive. By providing the cover layer 35 on the top surfaces of the sidewalls 21_1, 21_3, and 21_4 in this manner, a recess 36 surrounded by the sidewalls 21_1, 21_3, and 21_4 and the cover layer 35 can be formed. The thickness of the cover layer 35 is preferably 50 μm or more, more preferably 100 μm or more, and even more preferably 200 μm or more. By setting the thickness of the cover layer 35 within this range, deflection of the cover layer 35 can be suppressed when an adhesive, described below, is poured into the cover layer 35, and the thickness of the optical element (adhesive) 30 can be made uniform. The thickness of the cover layer 35 is preferably thinner than the thickness of the optical element, which makes it easier to avoid stress concentration on the cover layer 35. The thickness of the cover layer 35 is, for example, 3 mm or less, preferably 1 mm or less, and more preferably 0.5 mm or less.

[0079] The cover layer 35 can be made of transparent resins such as PET (polyethylene terephthalate), acrylic resin, polycarbonate resin, polystyrene resin, acrylonitrile-styrene resin, and silicone resin, with PET, acrylic resin, and polycarbonate being preferred. In particular, when a UV-curable adhesive is used as the adhesive for forming the optical element, it is preferable to use a resin that transmits UV light (particularly wavelengths of 365 nm to 405 nm). In addition, it is preferable that the difference in refractive index between the optical element and the cover layer 35 is larger than the difference in refractive index between the optical element and the glass plate, as this makes it less likely for light to leak to the outside.

[0080] Next, as shown in the left diagram of Fig. 21 , the glass plate 10 (first glass plate 11) is displaced (tilted) so that the opening of the recess 36 formed by the plurality of side wall portions 21_1, 21_3, 21_4 and the cover layer 35 faces upward. Note that Fig. 21 shows an example in which the glass plate 10 is displaced so that the main surface of the glass plate 10 is parallel to the vertical direction (x-axis direction), but the main surface of the glass plate 10 may be tilted at a predetermined angle with respect to the vertical direction (x-axis direction).

[0081] Then, as shown in the right diagram of FIG. 21 , an adhesive is poured into a recess 36 formed by the plurality of side wall portions 21_1, 21_3, and 21_4 and the cover layer 35, and the poured adhesive is cured to form an optical element 30 made of a transparent adhesive on the surface of the glass plate 10. By using such a manufacturing method, it is possible to manufacture a vehicle glass plate as shown in FIG. 22. For example, in the vehicle glass plate shown in FIG. 22, the cover layer 35 may function as the barrier layer 23 (see FIG. 5). By having the cover layer 35 function as the barrier layer 23 (see FIG. 5), the optical element 30 can be protected from the external environment. Furthermore, in the vehicle glass plate shown in FIG. 22, a separate protective member may be provided to protect the surface of the optical element 30 on the positive side in the x-axis direction.

[0082] In the manufacturing method shown in FIGS. 19 to 21, a cover layer 35 is provided on the top surfaces of the side wall portions 21_1, 21_3, and 21_4 to form recesses 36, and the glass plate 10 is displaced (tilted) so that the openings of the recesses 36 face upward. Then, an adhesive is poured into the recesses 36, and the poured adhesive is cured to form the optical element 30. This makes it easy to form the optical element 30 on the glass plate 10. The manufacturing method shown in FIGS. 19 to 21 is particularly useful for manufacturing a glass plate for a vehicle that includes a glass plate 10 (first glass plate 11) that is made of a curved plate. Furthermore, because the openings of the recesses 36 are positioned vertically upward, bubbles contained in the adhesive are easily removed by the effect of gravity after the adhesive is poured.

[0083] Although the modifications of this embodiment have been described above, the modifications may be combined as appropriate. [Example]

[0084] Next, examples will be described. The following samples were prepared as examples. First, as shown in FIG. 3, a frame 20 having side walls 21_1 to 21_4 was formed on the surface of the glass plate 10. The width of each of the side walls 21_1 to 21_4 was 2 mm. The inner dimensions of the frame 20 were 20 mm in the x-axis direction, 280 mm in the y-axis direction, and 2 mm in the z-axis direction (thickness). The inner dimensions of the frame 20 corresponded to the outer dimensions of the optical element 30. Samples were also produced using polycarbonate and acrylic resin as the materials for the frame 20.

[0085] Thereafter, an adhesive was poured into the recess 29 surrounded by the frame 20, and the poured adhesive was cured to form an optical element 30 on the surface of the glass plate 10. At this time, samples were prepared using a silicone-based photocurable resin (manufactured by Dow TORAY: refractive index 1.54) or an acrylic-based optical elastic resin (manufactured by Dexerials: refractive index 1.53) as the adhesive (OCR). In addition, a sample (corresponding to Example 3 (Comparative Example) in Table 1) using a glass prism as the optical element 30 was prepared. At this time, the glass prism was adhered to the glass plate 10 using a silicone-based photocurable resin as the adhesive. The configurations of the samples according to Examples 1 to 5 are shown in Table 1.

[0086] A dot-shaped scattering pattern 15 was formed on the glass plate 10 of the prepared samples toward the positive side in the x-axis direction. The distance from the light entrance part (the positive side of the side wall part 21_1 in the x-axis direction) to each dot of each sample is shown in Table 1. In Table 1, the first dot is the dot closest to the light entrance part, and the second dot is the dot next to the first dot (i.e., the dot on the positive side of the first dot in the x-axis direction). The same applies hereafter.

[0087] The light source was disposed on the negative side of the side wall portion 21_1 in the x-axis direction. Table 1 shows the brightness of the light scattered by each dot (scattering pattern 15) when light was introduced from the light source through the side wall portion 21_1 and the optical element 30 to the glass plate 10.

[0088] As shown in Table 1, the sample (comparative example) according to Example 3, which used a glass prism, had the highest brightness of the scattered light scattered by each dot. Furthermore, the samples according to Examples 1 and 2 and Examples 4 and 5 had lower brightness of the scattered light than the sample according to Example 3, but still demonstrated sufficient performance as optical elements. Therefore, it was demonstrated that light can be introduced into the glass plate 10 using the optical element 30 fabricated by curing the adhesive.

[0089] [Table 1]

[0090] The present invention has been described above in accordance with the above-mentioned embodiment, but the present invention is not limited to the configuration of the above-mentioned embodiment, and naturally includes various modifications, alterations, and combinations that a person skilled in the art can make within the scope of the invention as defined in the claims of this application. [Explanation of symbols]

[0091] 1, 1a, 1b, 1c, 1d Vehicle glass plate 10 Glass Plate 11 First glass plate 12 Second glass plate 13 Intermediate adhesive layer 15 Scattering Pattern 20 Frame 21_1~21_4 Side wall 22 Adhesive material 23 Barrier Layer 24 Adhesive material 25 Reflective layer 26 Resin layer 27 Side 28 Top surface 29 Recess 30 Optical Elements 35 Cover Layer 36 Recess 40 light source 41 Circuit Board 45 Cavity 71, 72 light

Claims

1. A glass plate and an optical element made of a transparent adhesive provided on the surface of the glass plate on the inside of the vehicle; a plurality of sidewall portions disposed on side surfaces of the optical element; Among the plurality of side wall portions, a first side wall portion disposed on a side where light is introduced from a light source is transparent, The light introduced from the light source to the first side wall portion is configured to be introduced into the glass plate via the optical element. Vehicle glass panels.

2. The glass plate for a vehicle according to claim 1 , wherein the first side wall portion has a width of 1 mm or more and 15 mm or less.

3. The glass plate for a vehicle according to claim 1 or 2, wherein a surface of the optical element opposite to the glass plate is covered with a resin layer or a barrier layer.

4. a second side wall portion is provided on a side surface of the optical element opposite to the side surface on which the first side wall portion is provided, The second side wall portion is configured to be higher in height than the first side wall portion with respect to the surface of the glass plate on the vehicle interior side as a reference. The glass plate for a vehicle according to claim 1 or 2.

5. 3. The vehicle glass plate according to claim 1, wherein light introduced from the light source to the top surface of the first side wall portion is reflected by a side surface of the first side wall portion opposite the optical element and then introduced into the optical element.

6. The glass plate for a vehicle according to claim 1 or 2, wherein the first side wall portion has a wedge-shaped cross section.

7. The thickness of the optical element is 0.5 mm or more, The refractive index of the optical element is 1.44 or more and 1.60 or less. The glass plate for a vehicle according to claim 1 or 2.

8. 3. The glass plate for a vehicle according to claim 1, wherein a height of the first side wall portion is greater than a height of the optical element relative to a surface of the glass plate on an interior side of the vehicle.

9. the plurality of side wall portions are frames arranged to surround side surfaces of the optical element, The glass plate for vehicle according to claim 1 or 2, wherein the frame is adhered to a surface of the glass plate facing the interior of the vehicle using an adhesive member.

10. the light source is mounted on a circuit board; The circuit board is supported by the first side wall portion. The glass plate for a vehicle according to claim 1 or 2.

11. a second side wall portion is provided on a side surface of the optical element opposite to the side surface on which the first side wall portion is provided, The second side wall portion is made of a material having a light-blocking property. The glass plate for a vehicle according to claim 1 or 2.

12. an interface where the optical element and the first side wall portion come into contact is inclined at a predetermined angle with respect to the surface of the glass plate facing the interior of the vehicle; a side surface of the first side wall portion opposite to the optical element, the side surface being configured so that light is introduced from the light source; an interface where the optical element and the first side wall portion are in contact with each other and a side surface of the first side wall portion opposite to the optical element are configured to be parallel to each other; The glass plate for a vehicle according to claim 1 or 2.

13. 3. The vehicle glass plate according to claim 1, wherein the glass plate is a laminated glass including a first glass plate, a second glass plate, and an intermediate adhesive layer disposed between the first glass plate and the second glass plate.

14. The glass plate for a vehicle according to claim 1 or 2, wherein at least a part of the glass plate is provided with a scattering pattern that scatters light introduced into the glass plate.

15. a frame having a plurality of side walls disposed on the surface of the glass plate; pouring an adhesive into the recess surrounded by the frame body, and hardening the poured adhesive to form an optical element made of a transparent adhesive on the surface of the glass plate; Among the side wall portions provided in the frame, a first side wall portion arranged on a side where light is introduced from the light source is made of a transparent material. A method for manufacturing glass sheets for vehicles.

16. The method for manufacturing a glass plate for a vehicle according to claim 15, wherein the first side wall portion has a width of 1 mm or more and 15 mm or less.

17. The method for manufacturing a glass plate for a vehicle according to claim 15 or 16, wherein the frame is adhered to a surface of the glass plate using an adhesive member.

18. a first side wall portion is disposed on a surface of the glass plate so as to extend in a first direction along the glass plate; a third side wall portion is disposed so as to extend from one end of the first side wall portion in a second direction intersecting the first direction; and a fourth side wall portion is disposed so as to extend from the other end of the first side wall portion in the second direction; a cover layer disposed on top surfaces of the first side wall portion, the third side wall portion, and the fourth side wall portion; displacing the glass plate so that an opening of a recess formed by the first side wall portion, the third side wall portion, the fourth side wall portion, and the cover layer faces upward, pouring an adhesive into the recess, and hardening the poured adhesive to form an optical element made of a transparent adhesive on the surface of the glass plate; Among the first side wall portion, the third side wall portion, and the fourth side wall portion, the first side wall portion disposed on the side where light is introduced from the light source is made of a transparent member. A method for manufacturing glass sheets for vehicles.

Images