Glass structure and method for manufacturing the same

Abstract

The present application provides a kind of glass structure body, which can inhibit the perspective deformation of the boundary between light-shielding processing part and light-transmitting part, can easily and low-cost form electric heating wire and bus bar, and has high design freedom of leading out wiring from bus bar.A kind of glass structure body (1), it has: light-shielding processing glass plate (10), it has optical device installation area (OP), light-transmitting part (TP) and light-shielding processing part (BP);Light-transmitting plate-shaped component (31) is installed on the surface of light-shielding processing glass plate (10) in the mode of covering light-transmitting part and part of light-shielding processing part, it is thinner than light-shielding processing glass plate;And conductive pattern film (32) is formed between light-shielding processing glass plate and light-transmitting plate-shaped component, it includes 1 or more electric heating wires;Wherein, light-transmitting plate-shaped component is bonded on light-shielding processing glass plate via adhesive film (20), electric heating wire is formed in adhesive film, and a pair of bus bar (41) is formed on the surface of light-shielding processing glass plate.

Description

TECHNICAL FIELD

[0001] The present application relates to a glass structure and a method for manufacturing the same. BACKGROUND

[0002] In a vehicle such as an automobile, an optical device such as a camera, a LiDAR (Light Detection And Ranging), a radar, and a light sensor for acquiring information on the front of the vehicle for automatic driving and preventing collision accidents, and a frame body such as a bracket for housing the optical device are sometimes provided on the inner surface of the front window glass.

[0003] The frame body has a window portion through which light is transmitted on the side of the front window glass. In the front window glass, a portion facing the window portion of the frame body of the optical device is a light-transmitting portion through which light is transmitted, and a light-shielding processed portion in which light-shielding processing is performed for preventing the incidence of unnecessary light is provided around the light-transmitting portion.

[0004] As the glass plate used for the front window glass, a laminated glass or a strengthened glass in which a plurality of glass plates are bonded is preferable. The light-shielding processing can be performed on the glass plate by applying a paste containing a black pigment and a glass frit to a prescribed region of the glass plate as a front window glass material and firing to form a light-shielding layer. The glass plate after the light-shielding processing is processed into a shape having a curved surface by heat forming.

[0005] In the case where a laminated glass is used as a front window glass material, the laminated glass can be manufactured by bonding a plurality of glass plates after forming a light-shielding layer in one or more of the plurality of glass plates as a laminated glass material, or the light-shielding layer can be formed on the surface of the manufactured laminated glass.

[0006] In the light-shielded glass plate, the light-shielded processed portion having the light-shielding layer is relatively thicker than the light-transmitting portion not having the light-shielding layer. Furthermore, in the heat forming step, the black light-shielded processed portion has a larger heat absorption amount than the light-transmitting portion, and the temperature thereof is higher. Due to these reasons, the light-shielded glass plate can have a concave-convex portion near the boundary between the light-shielded processed portion and the light-transmitting portion, and a perspective distortion can occur near the boundary between the light-shielded processed portion and the light-transmitting portion, which can cause a distortion in the image obtained by the optical device.

[0007] In order to solve the above-described problems, Patent Literature 1 discloses a window glass for a vehicle with an optical device in which a light-transmitting plate-shaped member (5) is adhered to the inner side of the light-shielded processed portion on the inner surface of the window glass for a vehicle via an adhesive (4) (claim 1 and FIG. 3, etc.).

[0008] PRIOR ART DOCUMENTS

[0009] PATENT LITERATURE

[0010] Patent Literature 1: Japanese Patent Application Laid-Open No. 2020-131736

[0011] Patent Literature 2: International Publication No. 2014 / 157535 SUMMARY

[0012] PROBLEMS TO BE SOLVED BY THE INVENTION

[0013] In order to improve the sensing accuracy of an optical device, it is preferable that an electrothermal wire or an electrothermal film that prevents fogging and freezing is provided in a light-transmitting portion of a front window glass located in front of an optical apparatus such as a camera or a radar included in the optical device.

[0014] Patent Literature 2 discloses a window glass for a vehicle in which a front window glass is composed of a laminated glass, and an electrothermal film (13) and a pair of bus bars (26, 27) for supplying power thereto are formed between a pair of glass sheets constituting the laminated glass (claim 1, [Detailed Description] item, Figure 1 and Figure 2 etc.).

[0015] In the window glass for a vehicle described in Patent Literature 2, the electrothermal film (13) is formed on substantially the entire surface in plan view, and the bus bars (26, 27) are formed in a band shape at the upper end portion and the lower end portion Figure 1 ).

[0016] In the technology described in Patent Literature 2, since the electrothermal film is formed on substantially the entire surface of the glass sheet of the laminated glass material constituting the front window glass, and the bus bars are formed in a band shape at the upper end portion and the lower end portion, it takes time and cost to form the electrothermal film and the pair of bus bars.

[0017] Further, in the technology described in Patent Literature 2, it is necessary to lead a wiring from the pair of bus bars formed inside the laminated glass constituting the front window glass and formed at the upper and lower end portions of the front window glass in plan view. In this case, it is necessary to lead the wiring from the bus bars to the inner surface side or the outer surface side through the side surface of the front window glass, and the wiring is led in a detour, and the appearance is not so good.

[0018] The present application has been achieved based on the above-described circumstances, and aims to provide a glass structure in which the design freedom of leading a wiring from a bus bar is high, the electrothermal wire and the bus bar can be easily and inexpensively formed, and the perspective distortion in the vicinity of the boundary between the light-shielding processed portion and the light-transmitting portion can be suppressed.

[0019] TECHNICAL PROBLEM AND SOLUTION TO THE PROBLEM

[0020] The present application provides the following glass structure and a method for manufacturing the same.

[0021] [1] A glass structure, comprising:

[0022] A light-shielding processed glass plate having an optical device mounting region for mounting an optical device, a light-transmitting portion through which incident light incident from the outside to the optical device and / or emergent light emergent from the optical device is transmitted, and a light-shielding processed portion surrounding at least a part of the light-transmitting portion;

[0023] A light-transmitting plate-shaped member thinner than the light-shielding processed glass plate, which is mounted on the optical device mounting surface of the light-shielding processed glass plate in a manner of covering the light-transmitting portion and a part of the light-shielding processed portion;

[0024] A conductive pattern film including one or more electric heating wires, which is formed between the light-shielding processed glass plate and the light-transmitting plate-shaped member;

[0025] The light-transmitting plate-shaped member is adhered to the light-shielding processed glass plate via an adhesive film,

[0026] The electric heating wires are formed in the adhesive film,

[0027] A pair of bus bars for supplying power to one or more electric heating wires is formed on the mounting surface of the light-shielding processed glass plate.

[0028] [2] A method for manufacturing the glass structure of [1], including the following steps:

[0029] A step (S11) of preparing a light-shielding processed glass plate with bus bars, on which the pair of bus bars is formed,

[0030] A step (S12) of preparing a resin film with a conductive pattern film, on which the conductive pattern film is formed,

[0031] A step (S13) of preparing the light-transmitting plate-shaped member, and

[0032] A step (S14) of superimposing and heat-pressing the light-shielding processed glass plate with bus bars, the resin film with a conductive pattern film, and the light-transmitting plate-shaped member.

[0033] [3] The method for manufacturing the glass structure of [1], wherein

[0034] The light-shielding processed glass plate is a laminated glass in which a light-shielding layer is formed in a part of the interior and / or surface, and the method includes the following steps:

[0035] A step (S21) of preparing a plurality of glass plates in which a light-shielding layer is formed in a part of the surface of at least one plate and the pair of bus bars is formed on the surface of one plate,

[0036] a step (S22) of preparing the conductive pattern film resin film on which the conductive pattern film is formed,

[0037] a step (S23) of preparing the light-transmissive plate-shaped member, and

[0038] a step (S24) of superimposing and heat-bonding a glass pre-laminate obtained by arranging the adhesive resin film with the pair of bus bars located on the outermost surfaces between the respective glass plates and overlapping the plurality of glass plates, the conductive pattern film resin film, and the light-transmissive plate-shaped member.

[0039] Effects of Invention

[0040] In the glass structure of the present application, the light-transmissive plate-shaped member thinner than the light-shielding processed glass plate is mounted on the mounting surface of the optical device of the light-shielding processed glass plate in a manner of covering a part of the light-transmissive portion and the light-shielding processed portion. One or more electric heating wires are formed on the light-transmissive plate-shaped member, and a pair of bus bars are formed on the light-shielding processed glass plate.

[0041] The glass structure of the present application configured as described above can suppress the perspective distortion in the vicinity of the boundary between the light-shielding processed portion and the light-transmissive portion, can easily and inexpensively form the electric heating wire and the bus bar, and can freely design the wiring drawn from the bus bar. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 An overall plan view of the glass structure of one embodiment of the present application is shown.

[0043] Figure 2 A partial enlarged plan view of Figure 1 is shown.

[0044] Figure 3A A III-III line cross-sectional view of the first aspect of the glass structure of Figure 1 is shown.

[0045] Figure 3B A III-III line cross-sectional view of the second aspect of the glass structure of Figure 1 is shown.

[0046] Figure 4A A schematic cross-sectional view of the manufacturing method of the glass structure of the first embodiment of the present application is shown.

[0047] Figure 4B A schematic cross-sectional view of the manufacturing method of the glass structure of the second embodiment of the present application is shown. DETAILED DESCRIPTION

[0048] In general, thin film structures are referred to as "films" and "sheets" and the like depending on the thickness. The present specification does not make a clear distinction therebetween. Therefore, "films" described in the present specification sometimes include "sheets".

[0049] In the present specification, "approximately" in the context of a shape refers to a shape that is partially changed, such as a chamfered shape in which the corners of the shape are rounded, a shape in which a part of the shape is missing, or a shape in which an arbitrary small shape is added to the shape.

[0050] In the present specification, unless otherwise specified, "up and down", "left and right", "vertical and horizontal" refer to "up and down", "left and right", "vertical and horizontal" in a state in which the glass structure is embedded in a vehicle or the like (actual use state).

[0051] In the present specification, unless otherwise specified, "~" indicating a numerical range is used in the sense that the numerical values recited before and after it are included as lower limit values and upper limit values.

[0052] Hereinafter, an embodiment of the present application will be described.

[0053] [Glass structure]

[0054] The structure of the glass structure of one embodiment of the present application will be described with reference to drawings.

[0055] Figure 1 An overall plan view of the glass structure of the present embodiment is shown. Figure 2 A partial enlarged plan view of Figure 1 is shown. Figure 1 and Figure 2 are perspective views. Figure 3A A III-III line cross-sectional view of the first mode of the glass structure of the present embodiment is shown. Figure 3B A III-III line cross-sectional view of the second mode of the glass structure of the present embodiment is shown. These are schematic views, and the scale of each constituent element in each drawing is appropriately different from the actual for convenience of recognition.

[0056] As shown in Figure 1 , the glass structure 1 of the present embodiment has a light-shielded processed glass sheet 10 having an optical device mounting region OP for mounting an optical device, a light-transmitting portion TP located in the optical device mounting region OP and through which incident light incident on the optical device from the outside and / or emergent light emerging from the optical device is transmitted, and a light-shielded processed portion BP that surrounds at least a part of the light-transmitting portion TP. The light-shielded processed portion BP is a portion in which light-shielded processing is performed.

[0057] The glass structure 1 of the present embodiment can be preferably applied to a vehicle glass for a vehicle such as an automobile. For example, it can be applied to a front window glass, a side window glass, and a rear window glass, and is preferably applied to a front window glass. The shape of the glass structure 1 can be appropriately designed, and for example, a shape in which a plate having a substantially trapezoidal shape in plan view is bent as a whole can be cited.

[0058] The light-shielding processed glass plate 10 is a glass plate having a light-shielding processed portion BP in which light-shielding processing has been performed. As the glass plate, a strengthened glass, a laminated glass, and an organic glass can be cited, and a strengthened glass or a laminated glass is preferred.

[0059] Figure 3A In the first aspect shown, the light-shielding processed glass plate 10 is a light-shielding processed strengthened glass 10A in which a light-shielding layer BL is formed on a portion of the surface of a strengthened glass 11.

[0060] The light-shielding processed strengthened glass 10A is processed into a shape having a curved surface by heat forming after the light-shielding layer BL is formed, as necessary.

[0061] Figure 3B In the second aspect shown, the light-shielding processed glass plate 10 is a light-shielding processed laminated glass 10B in which a light-shielding layer BL is formed on a portion of the surface and / or the inside of a laminated glass in which a plurality of glass plates 12 are bonded via an interlayer film 13. The light-shielding processed laminated glass 10B can be prepared by bonding at least one of the plurality of glass plates 12 in which a light-shielding layer BL is formed on a portion of the surface via the interlayer film 13, or can be prepared by forming a light-shielding layer BL on a portion of the surface of a laminated glass prepared in advance. In the illustrated example, the light-shielding processed laminated glass 10B is prepared by bonding two glass plates 12 in which a light-shielding layer BL is formed on a portion of the surface via the interlayer film 13. The laminated glass can be prepared by bonding three or more glass plates.

[0062] The plurality of glass plates as the laminated glass material are bonded after being processed into a shape having a curved surface by heat forming, as necessary.

[0063] The type of the glass plate as the strengthened glass and the laminated glass material is not particularly limited, and a soda-lime glass, a borosilicate glass, an aluminosilicate glass, a lithium silicate glass, a quartz glass, a sapphire glass, and a non-alkali glass, or the like can be cited.

[0064] The strengthened glass is obtained by performing a strengthening process on the above-described glass plate by a publicly known method such as an ion exchange method and a wind chill strengthening method. As the strengthened glass, a wind chill strengthened glass is preferred.

[0065] The thickness of the strengthened glass is not particularly limited, and can be designed according to the use. In the use for a front window glass, a side window glass, and a rear window glass of a vehicle, 2 to 6 mm is preferred.

[0066] There is no particular limitation on the thickness of laminated glass; it can be designed according to its intended use. For applications such as windshields, side windows, and rear windows in vehicles, a thickness of 2–6 mm is preferred.

[0067] Tempered glass and laminated glass may have a coating on at least a portion of their surface that provides functions such as water repellency, low reflectivity, low radioactivity, ultraviolet shielding, infrared shielding, and coloring.

[0068] At least a portion of the interior of the laminated glass may have a film with functions such as low reflectivity, low radioactivity, ultraviolet shielding, infrared shielding, and coloring. At least a portion of the interlayer film in the laminated glass may have functions such as ultraviolet shielding, infrared shielding, and coloring.

[0069] The interlayer in laminated glass can be a single layer or a multilayer layer.

[0070] Laminated glass may have films or devices inside that have functions such as emitting light, dimming, reflecting infrared or visible light, scattering light, absorbing light, and adding decoration.

[0071] Materials that can be used for acrylic glass include: engineering plastics such as polycarbonate (PC); polyethylene terephthalate (PET); acrylic resins such as polymethyl methacrylate (PMMA); polyvinyl chloride; polystyrene (PS); and combinations thereof, with engineering plastics such as polycarbonate (PC) being preferred.

[0072] The light-shielding layer BL can be formed by known methods, such as by applying a paste containing black pigment and glass frit to a designated area on the surface of tempered glass 11, glass plate 12 as a laminated glass material, laminated glass, or plexiglass and heating it.

[0073] The thickness of the light-shielding layer B is not particularly limited, for example, it is 5 to 20 μm.

[0074] like Figure 1 , Figure 3A and Figure 3B As shown, the glass structure 1 of this embodiment has a light-transmitting plate-shaped member 31 that is thinner than the light-shielding glass plate 10, which is mounted on the mounting surface 10S of the optical device of the light-shielding glass plate 10 in such a way that it covers a portion of the light-transmitting portion TP and the light-shielding portion BP.

[0075] like Figure 1 As shown, the area of ​​the light-shielding processing section BP includes the area of ​​the optical device mounting area OP excluding the light-transmitting part TP, and preferably includes the area of ​​the optical device mounting area OP excluding the light-transmitting part TP and the periphery of the glass structure 1.

[0076] The optical device can include, for example, a camera, a LiDAR (Light Detection And Ranging), a radar, a light sensor, and the like, which are optical equipment for acquiring information in front of a vehicle for automatic driving and preventing collision accidents and the like, and a frame body, called a bracket or the like, which houses the same.

[0077] The shape of the optical device mounting region OP and the light-transmitting portion TP can be appropriately designed in accordance with the shape of the optical device, and can be a substantially trapezoidal shape, a substantially rectangular shape, or the like. The shape of the optical device mounting region OP and the light-transmitting portion TP can be a similar shape or a non-similar shape. In the illustrated example, the shape of the optical device mounting region OP and the light-transmitting portion TP is a substantially trapezoidal shape.

[0078] In the illustrated example, the light-shielding processed portion BP surrounds all four sides of the light-transmitting portion TP, but the light-shielding processed portion BP can surround at least a portion of the light-transmitting portion TP, and can surround, for example, only three sides of the substantially trapezoidal or substantially rectangular light-transmitting portion TP.

[0079] The wavelength region of light that transmits through the light-transmitting portion TP is not particularly limited, and can be, for example, a visible light region, an infrared light region, a visible light region to an infrared light region, or the like.

[0080] The planar shape of the light-transmitting plate-shaped member 31 can be appropriately designed, and can be, for example, a substantially rectangular shape, a substantially trapezoidal shape, a combination thereof, or the like. Figure 1 In the illustrated example, the planar shape of the light-transmitting plate-shaped member 31 is a substantially rectangular shape.

[0081] The thickness of the light-transmitting plate-shaped member 31 can be appropriately designed within a range that satisfies the condition of being thinner than the light-shielding processed glass plate 10, and is preferably 1 mm or less, more preferably 0.8 mm or less, particularly preferably 0.5 mm or less, and most preferably 0.3 mm or less. The lower limit of the thickness of the light-transmitting plate-shaped member 31 is not particularly limited, and is preferably 0.1 mm. When the thickness of the light-transmitting plate-shaped member 31 is as thin as 1 mm or less, the light-transmitting plate-shaped member 31 can be favorably fitted to the curved surface of the light-shielding processed glass plate 10, and is thus preferred.

[0082] The material of the light-transmitting plate-shaped member 31 is not particularly limited, and is preferably glass and / or a resin. As the glass, a strengthened glass such as chemically strengthened glass is preferred. As the resin, an engineering plastic such as polycarbonate (PC), polyethylene terephthalate (PET), an acrylic resin such as polymethyl methacrylate (PMMA), polyvinyl chloride, polystyrene (PS), a combination thereof, or the like is preferred, and an engineering plastic such as polycarbonate (PC) is particularly preferred.

[0083] When the light-transmitting plate-shaped member 31 is composed of a strengthened glass or an engineering plastic such as polycarbonate, the bending rigidity is high, and the heat resistance to the heat generation of the electric heating wire 32L described later is good, and thus is preferred.

[0084] In the use for vehicles such as automobiles, the radius of curvature of the inner surface (typically, a concave curved surface) of the light-shielding processed glass plate 10 and the inner surface (typically, a concave curved surface) of the light-transmissive plate-shaped member 31 is not particularly limited, and is preferably 1000 to 20000 mm. From the viewpoint of suppressing the perspective distortion, it is preferable that the difference between the radius of curvature of the inner surfaces of the light-shielding processed glass plate 10 and the light-transmissive plate-shaped member 31 be small.

[0085] In the illustrated example, the mounting region of the light-transmissive plate-shaped member 31 is housed in the optical device mounting region OP, but the mounting region of the light-transmissive plate-shaped member 31 can also be exposed from the optical device mounting region OP.

[0086] As shown in Figure 3A and Figure 3B , the light-transmissive plate-shaped member 31 is adhered to the light-shielding processed glass plate 10 via the adhesive film 20.

[0087] As shown in Figure 2 , Figure 3A and Figure 3B , in the glass structure 1 of the present embodiment, a conductive pattern film 32 including one or more electric heating wires 32L is formed between the light-shielding processed glass plate 10 and the light-transmissive plate-shaped member 31. The one or more electric heating wires 32L are formed in the adhesive film 20 for adhering the light-transmissive plate-shaped member 31 to the light-shielding processed glass plate 10.

[0088] The adhesive film 20 is composed of a resin film. As the constituent resin, there is no particular limitation as long as it is a resin that can adhere the light-shielding processed glass plate 10 and the light-transmissive plate-shaped member 31 well. The adhesive film 20, for example, preferably includes one or more resins selected from the group consisting of polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), cyclic olefin polymer (COP), polyurethane (PU), and ionomer resin.

[0089] The adhesive film 20 can also include one or more additives other than the resin as needed.

[0090] As the material of the adhesive film 20, a resin film including the above-mentioned exemplified resins is preferable, and a commercially available resin film for interlayer glass and a commercially available optical film or the like can be used.

[0091] The thickness value of the adhesive film 200 is not particularly limited, and is preferably 0.02 to 1 mm. If the thickness of the adhesive film 20 is within this range, the light-transmissive plate-shaped member 31 can be well adhered to the light-shielding processed glass plate 10 via the adhesive film 20, and the perspective distortion of the glass structure 1 can be effectively suppressed.

[0092] The thickness of the intermediate film of the conventional laminated glass is 200 to 760 μm using a commercially available resin film, and the thickness of the adhesive film 20 formed using the same is 190 to 760 μm. A commercially available optical film (for example, an optical adhesive sheet (OCA) or the like) thinner than the commercially available resin film for the intermediate film of the laminated glass can be used.

[0093] In the case of the light-shielding processed laminated glass 10B in which the light-shielding layer BL is formed on a part of the inner surface and / or the surface of the light-shielding processed glass sheet 10, the thickness of the adhesive film 20 is preferably thinner than the thickness of the intermediate film 13 of the light-shielding processed laminated glass 10B. In addition, Figure 3B In the drawings, the intermediate film 13 and the adhesive film 20 are thickened for ease of recognition.

[0094] If the electrically heated wire 32L is energized, the temperature of the vicinity of the electrically heated wire 32L in the adhesive film 20 is higher than that of other portions, and a difference in refractive index occurs between the vicinity of the electrically heated wire 32L and other portions. In the case where the difference in refractive index is large, the image obtained by the optical device can be distorted. By making the thickness of the adhesive film 20 thin, the distortion of the image caused by the energization can be suppressed, and thus it is preferable.

[0095] As shown in FIG. 1, the conductive pattern film 32 includes one or more electrically heated wires 32L, and preferably includes a plurality of electrically heated wires 32L. In addition, the conductive pattern film 32 preferably includes one or more electrically heated wires 32L and a pair of bus bar portions 32B that supply electric power to the one or more electrically heated wires 32L. Figure 2

[0096] Figure 1 Figure 2 Figure 3A Figure 3B As shown in FIG. 1, a pair of bus bars 41 that supply electric power to the one or more electrically heated wires 32L are formed on the mounting surface 10S of the light-shielding processed glass sheet 10. In the drawing, the symbol BG indicates a light-shielding processed glass sheet with bus bars in which a pair of bus bars 41 are formed on the light-shielding processed glass sheet 10.

[0097] In the present embodiment, a part of the bus bar 41 overlaps the light-transmissive plate-like member 31 in plan view. With this configuration, the conduction of the conductive pattern film 32 to the pair of bus bars 41 formed on the light-shielding processed glass sheet 10 becomes easy.

[0098] The overlapping width W of the bus bar 41 on the light-shielding processed glass sheet 10 and the light-transmissive plate-like member 31 in plan view is not particularly limited, and is preferably 2 to 15 mm, and more preferably 5 to 10 mm. If the overlapping width W is within this range, the distortion of the light-transmissive plate-like member 31 can be effectively suppressed.

[0099] ​​​​​In the present embodiment, at least a portion of the one or more electric heating wires 32L and / or at least a portion of the bus bar portions 32B included in the conductive pattern film 32 are connected to the bus bars 41 formed on the light-shielding processed glass plate 10.

[0100] By applying a voltage between the pair of bus bars 41 to cause a current to flow through the one or more electric heating wires 32L, fogging and freezing of the glass structure 1 can be prevented.

[0101] By providing the one or more electric heating wires 32L for preventing fogging and freezing in the region including the light-transmitting portion TP in front of the optical equipment such as a camera and a radar included in the optical device, the sensing accuracy of the optical device can be improved.

[0102] The wiring pattern and arrangement pattern of the electric heating wires 32L are not particularly limited. For example, as shown in FIG. 1, a plurality of electric heating wires 32L in a wavy line shape and a zigzag line shape and the like are preferably arranged in parallel at a predetermined interval and connected in parallel to the pair of bus bars 41 or the pair of bus bar portions 32B. Figure 2

[0103] Hereinafter, the bus bar and the bus bar portion are collectively referred to as "bus bar (portion)".

[0104] The wavelength and / or period of the electric heating wire 32L can be changed on the way from one bus bar (portion) (one pole) to the other bus bar (portion) (the other pole).

[0105] In the case where the conductive pattern film 32 includes a plurality of electric heating wires 32L, the phases of the electric heating wires 32L adjacent to each other can be the same or different between one bus bar (portion) (one pole) and the other bus bar (portion) (the other pole). If the phases of the electric heating wires 32L adjacent to each other are different, the light flare caused by regular scattering of light can be suppressed, and thus this is preferable.

[0106] Two or more electric heating wires 32L among the plurality of electric heating wires 32L shown in FIG. 1 can be connected. Figure 2

[0107] The shape and arrangement of the pair of bus bar portions 32B and the pair of bus bars 41 can be appropriately designed.

[0108] ​​The pair of bus bar portions 32B can be arranged facing each other in a manner of sandwiching the light-transmissive portion TP from the outside in a plan view. In this case, it is easy to uniformly heat one or more electric heating wires 32L, and thus is preferable. The pair of bus bar portions 32B can be arranged up and down or left and right in a manner of sandwiching the light-transmissive portion TP from the outside in a plan view. The pair of bus bar portions 32B is preferably arranged in a manner of being axially symmetrical to sandwich the light-transmissive portion TP from the outside in a plan view. In the illustrated example, the pair of bus bar portions 32B is arranged in a manner of being axially symmetrical to sandwich the light-transmissive portion TP from the outside in a plan view up and down.

[0109] Likewise, the pair of bus bars 41 can also be arranged facing each other in a manner of sandwiching the light-transmissive portion TP from the outside in a plan view. In this case, it is easy to uniformly heat one or more electric heating wires 32L, and thus is preferable. The pair of bus bars 41 can be arranged up and down or left and right in a manner of sandwiching the light-transmissive portion TP from the outside in a plan view. The pair of bus bars 41 is preferably arranged in a manner of being axially symmetrical to sandwich the light-transmissive portion TP from the outside in a plan view.

[0110] As shown in Fig. 1, the conductive pattern film 32 and the pair of bus bars 41 are preferably arranged within the optical device mounting region OP. Figure 1

[0111] The line width of the electric heating wire 32L can be appropriately designed.

[0112] The line width is preferably 2 to 150 μm, and more preferably 5 to 50 μm, from the viewpoint of the balance between the functions of preventing fogging and freezing and transparency.

[0113] The thickness is preferably 0.01 to 20 μm, and more preferably 0.05 to 10 μm, from the viewpoint of the balance between the functions of preventing fogging and freezing and transparency.

[0114] The pitch is preferably 1 to 50 μm, and more preferably 2 to 10 μm, from the viewpoint of the balance between the functions of preventing fogging and freezing and transparency.

[0115] The planar shape of the pair of bus bar portions 32B and the pair of bus bars 41 can be appropriately designed.

[0116] As the planar shape of the bus bar portion 32B, a linear shape, a band-like shape, a substantially rectangular shape, a substantially trapezoidal shape, a combination thereof, or the like can be exemplified. In the illustrated example, it is a band-like shape.

[0117] As the planar shape of the bus bar 41, a linear shape, a band-like shape, a substantially rectangular shape, a substantially trapezoidal shape, a combination thereof, or the like can be exemplified. In the present embodiment, a part of the bus bar 41 is positioned between the light-shielding processed glass plate 10 and the light-transmissive plate-like member 31, and the remaining part is exposed from the light-transmissive plate-like member 31. Figure 2 ​In the illustrated example, the bus bars 41 are composed of band-shaped portions 41A formed so as to extend along the edges of the light-transmissive plate-shaped member 31 below the light-transmissive plate-shaped member 31, and substantially rectangular portions 41B formed so as to connect the band-shaped portions 41A and be located outside the light-transmissive plate-shaped member 31.

[0118] In the illustrated example, the conductive pattern film 32 includes a plurality of electric heating wires 32L and a pair of bus bar portions 32B. Each of the electric heating wires 32L extends in the vertical direction, and the pair of bus bar portions 32B are arranged in an upper-lower axis-symmetrical manner so as to sandwich the light-transmissive portion TP outside. The pair of bus bars 41 are arranged in an upper-lower axis-symmetrical manner so as to sandwich the light-transmissive portion TP outside.

[0119] Each of the upper and lower ends of each of the electric heating wires 32L is connected to the bus bar portions 32B arranged on the upper and lower sides so as to sandwich the light-transmissive portion TP, and the bus bars 41 arranged on the upper and lower sides so as to sandwich the light-transmissive portion TP. The bus bar portions 32B of the conductive pattern film 32 arranged on the upper and lower sides so as to sandwich the light-transmissive portion TP are connected to the bus bars 41 arranged on the upper and lower sides so as to sandwich the light-transmissive portion TP.

[0120] The conductive pattern film 32 includes one or more kinds of conductive materials. As the material of the conductive pattern film 32, there can be mentioned metals such as Ag, Au, Cu, Pd, Pt, Ti, Cr, Ni, Al, Zr, W, V, Rh, Ir, and alloys thereof; metal oxides such as ZnO, SnO2, In2O3 (ITO), WO3, Al2O3, Ga2O5, TiO2, and Ta2O5; and combinations thereof. The conductive pattern film 32 can be a laminated film.

[0121] The film formation method of the conductive pattern film 32 is not particularly limited, and there can be mentioned physical vapor deposition methods (PVD) such as sputtering, vacuum evaporation, and ion plating; chemical vapor deposition (CVD); and wet coating.

[0122] One or more of the electric heating wires 32L are not formed as films, and one or more commercially available conductive wires can be used as the electric heating wires 32L.

[0123] The pair of bus bars 41 is a conductive film including one or more kinds of conductive materials. As the material of the pair of bus bars 41, there can be mentioned metals such as Ag, Au, Cu, Pd, Pt, Ti, Cr, Ni, Al, Zr, W, V, Rh, Ir, and alloys thereof; metal oxides such as ZnO, SnO2, In2O3 (ITO), WO3, Al2O3, Ga2O5, TiO2, and Ta2O5; and combinations thereof. The pair of bus bars 41 can be a laminated film.

[0124] The ratio of the thickness of the bus bar 41 to the thickness of the light-transmissive plate-shaped member 31 (thickness of bus bar / thickness of light-transmissive plate-shaped member) is not particularly limited, and is preferably 0.05 or less, more preferably 0.02 or less.

[0125] The thickness of the bus bar 41 is not particularly limited, and is preferably 20 μm or less, more preferably 15 μm or less, particularly preferably 10 μm or less. The lower limit of the thickness of the bus bar 41 is preferably 5 μm, more preferably 6 μm.

[0126] The method of forming the bus bar 41 is not particularly limited. The bus bar 41 can be formed, for example, by printing a conductive paste containing one or more conductive particles on the mounting surface 10S of the light-shielding processed glass plate 10 and heating. As the conductive paste, a copper paste containing copper particles and an organic binder, a silver paste containing silver particles and an organic binder, and the like are preferable.

[0127] A pair of bus bars 41 has a terminal 61 mounted thereon as needed.

[0128] The planar shape of the terminal 61 and the mounting position of the terminal 61 with respect to the bus bar 41 can be appropriately designed within a range that does not affect the mounting of the optical device.

[0129] In the illustrated example, the bus bar 41 has the terminal 61 mounted thereon at a portion located further outside the light-transmissive plate-shaped member 31. At least a portion of the terminal 61 can be located on the bus bar 41, and a portion of the terminal 61 can be exposed from the bus bar 41, in plan view.

[0130] The terminal 61 can be mounted on the bus bar 41 by a publicly known method, and a fixing method using solder is preferable, for example.

[0131] In general, in a light-shielding processed glass plate, the light-shielding processed portion having a light-shielding layer is relatively thicker than the light-transmissive portion not having a light-shielding layer. Furthermore, in a heat forming process of the glass plate, the black light-shielding processed portion absorbs heat more than the light-transmissive portion, and the temperature thereof increases more. Due to these reasons, the light-shielding processed glass plate can have a concave-convex at the boundary between the light-shielding processed portion and the light-transmissive portion, and a perspective distortion can occur at the boundary between the light-shielding processed portion and the light-transmissive portion, which can cause a distortion in an image obtained by the optical device.

[0132] In the glass structure 1 of the present embodiment, the light-transmissive plate-shaped member 31 thinner than the light-shielding processed glass plate 10 is mounted on the mounting surface 10S of the optical device of the light-shielding processed glass plate 10 via the adhesive film 20 so as to cover a portion of the light-transmissive portion TP and the light-shielding processed portion BP. Therefore, as shown in FIG. 1, the light-transmissive plate-shaped member 31 is present at the boundary between the light-shielding processed portion BP and the light-transmissive portion TP, and the light-transmissive plate-shaped member 31 is present at the boundary between the light-shielding processed portion BP and the light-transmissive portion TP. Figure 3A and Figure 3BThe illustrated, the sun processing glass plate 10 of the sun processing part BP and the boundary of the light transmission part TP near the concave and convex is small, the sun processing glass plate 10 of the sun processing part BP and the boundary near the light transmission part TP is inhibited to the perspective deformation, the image obtained by the optical device can be inhibited to produce deformation.

[0133] The presence or degree of perspective distortion can be evaluated, for example, by the distortion of the pattern seen when identifying the zebra pattern through the glass structure.

[0134] [BACKGROUND] The vehicle window glass described in Patent Document 2 listed in the item is formed with an electrothermal film on substantially the entire surface of the interior of the laminated glass constituting the front window glass, and a band-shaped bus bar is formed at both upper and lower end portions.

[0135] In the present embodiment, since the one or more electrothermal wires 32L do not need to be formed on the large-area sun processing glass plate 10, but only need to be formed on the small-area light-transmissive plate-shaped member 31, the formation area of the one or more electrothermal wires 32L is narrow, and the one or more electrothermal wires 32L can be easily and inexpensively formed in a process different from the manufacturing of the sun processing glass plate 10.

[0136] In the present embodiment, a pair of bus bars 41 is formed on the mounting surface 10S of the sun processing glass plate 10. The formation area of the pair of bus bars 41 can be designed to be smaller in cooperation with the formation area of the one or more electrothermal wires 32L formed on the light-transmissive plate-shaped member 31. Therefore, the pair of bus bars 41 can also be easily and inexpensively formed.

[0137] In the present embodiment, since the pair of bus bars 41 is formed on the mounting surface 10S of the sun processing glass plate 10, unlike the case where the pair of bus bars 41 is formed on the light-transmissive plate-shaped member 31, there is no case where the light-transmissive plate-shaped member 31 is deformed due to the presence of the pair of bus bars 41 in the sintering process of the pre-laminate or the like.

[0138] In the present embodiment, since the pair of bus bars 41 is formed on the mounting surface 10S of the sun processing glass plate 10, unlike the case where the pair of bus bars 41 is formed on the light-transmissive plate-shaped member 31, it is also easy to form the terminal 61 on the bus bar 41.

[0139] In the vehicle window glass described in Patent Document 2, it is necessary to lead the wiring from the pair of bus bars formed in the interior of the laminated glass constituting the front window glass and formed at both upper and lower end portions of the front window glass as viewed from below. In this case, it is necessary to lead the wiring from the bus bar to the inner surface side or the outer surface side through the side surface of the front window glass, and the wiring is led in a detour, and the appearance is not good.

[0140] In the present embodiment, since one or more electric heating wires 32L are formed on the light-transmissive plate-shaped member 31 and a pair of bus bars 41 are formed in the vicinity thereof, the design freedom of the mounting position of the light-transmissive plate-shaped member 31 of the light-shielding processed glass plate 10 and the formation position of the pair of bus bars 41 is high. Therefore, the design freedom of the wiring drawn from the bus bar 41 is high, and the wiring drawn from the bus bar 41 can be designed in good taste.

[0141] Unlike the vehicle window described in Patent Literature 2 in which an electric heating film and a pair of bus bars are enclosed inside a laminated glass, the glass structure 1 of the present embodiment is preferable because the one or more electric heating wires 32L formed on the light-transmissive plate-shaped member 31 can directly heat the dew condensation surface, and thus the anti-fog performance is also high.

[0142] The distance between the bus bar 41 and the plane of the light-transmissive portion TP is not particularly limited. From the viewpoint of preventing perspective distortion in the vicinity of the bus bar, the shortest distance between the bus bar 41 and the plane of the light-transmissive portion TP is preferably 3 mm or more. From the viewpoint of securing the field of view, the upper limit of the shortest distance between the bus bar 41 and the plane of the light-transmissive portion TP is preferably 20 mm.

[0143] As described above, according to the present embodiment, it is possible to provide a glass structure 1 in which perspective distortion in the vicinity of the boundary between the light-shielding processed portion and the light-transmissive portion is suppressed, the electric heating wire and the bus bar can be formed easily and at low cost, and the design freedom of the wiring drawn from the bus bar is high.

[0144] [Method for manufacturing glass structure of first embodiment]

[0145] As shown in Figure 4A , the method for manufacturing the glass structure of the first embodiment of the present application has the following steps:

[0146] a step (S11) of preparing a bus-bar-equipped light-shielding processed glass plate BG in which a pair of bus bars 41 are formed on a light-shielding processed glass plate 10,

[0147] a step (S12) of preparing a conductive pattern film-equipped resin film EF in which a conductive pattern film 32 is formed on an adhesive resin film 20P,

[0148] a step (S13) of preparing a light-transmissive plate-shaped member 31, and

[0149] a step (S14) of superimposing and thermally pressure-bonding the bus-bar-equipped light-shielding processed glass plate BG, the conductive pattern film-equipped resin film EF, and the light-transmissive plate-shaped member 31.

[0150] (Step (S11))

[0151] The light-shielding processed glass plate 10 is prepared. The Figure 3AThe light-shielding tempered glass 10A shown has a light-shielding layer BL formed on a portion of its surface. Figure 3B The laminated glass 10B shown is formed by bonding multiple glass plates 12 together with an interlayer film 13, and a portion of its interior and / or surface has a light-shielding layer BL. The method for forming the light-shielding layer BL has been described above and is therefore omitted here.

[0152] A pair of busbars 41 are formed on the mounting surface 10S of the light-shielding tempered glass 10A or the light-shielding laminated glass 10B, in preparation for... Figure 4A The light-shielding glass plate BG with busbars is shown. Further, as needed, terminals 61 are formed on each of the pair of busbars 41. The methods for forming the pair of busbars 41 and terminals 61 have been described above and are therefore omitted here.

[0153] Figure 4A The image shown corresponds to Figure 3A A schematic cross-sectional view. This figure illustrates the case where the light-shielding glass plate 10 is light-shielding tempered glass 10A.

[0154] (Process (S12))

[0155] In addition, such as Figure 4A As shown, a conductive pattern film 32 is formed on the adhesive resin film 20P, and a resin film EF with the conductive pattern film is prepared. The method for forming the conductive pattern film 32 has been described above, and therefore is omitted here.

[0156] (Process (S13))

[0157] In addition, such as Figure 4A As shown, a light-transmitting plate-shaped component 31 is prepared.

[0158] The order of operations (S11), (S12), and (S13) is not particularly limited, and multiple operations can be performed simultaneously.

[0159] (Process (S14))

[0160] Will as Figure 4A The pre-laminated body is obtained by overlapping the light-shielding glass plate BG with busbars, the resin film EF with conductive pattern film, and the light-transmitting plate-shaped component 31.

[0161] The light-transmitting plate-shaped member 31 is configured to cover a portion of the light-transmitting portion TP and the light-blocking portion BP of the light-blocking processed glass plate 10.

[0162] The resin film EF with the conductive pattern film is arranged between the busbar-attached blackout-processed glass plate BG and the light-transmissive plate-shaped member 31 in a manner that the conductive pattern film 32 side of the resin film EF is arranged on the busbar-attached blackout-processed glass plate BG side and the resin film 20P side is arranged on the light-transmissive plate-shaped member 31 side. The resin film EF with the conductive pattern film is arranged between the busbar-attached blackout-processed glass plate BG and the light-transmissive plate-shaped member 31 in a manner that a part of the conductive pattern film 32 of the resin film EF is in contact with the busbar 41.

[0163] The obtained pre-laminate is thermocompression-bonded. In this process, the resin film 20P is softened and subjected to pressure, and the softened resin is diffused between the one or more electrically heated wires 32L and the blackout-processed glass plate 10, and the blackout-processed glass plate 10 and the light-transmissive plate-shaped member 31 are bonded via the adhesive film 20, as shown in FIG. 1. Figure 3A

[0164] The thermocompression bonding can be performed by a publicly known method. As the thermocompression bonding method, there can be mentioned a method of placing the pre-laminate in a bag made of rubber or the like and heating in a vacuum; a method of pressing and heating the pre-laminate using an automatic pressure and heating treatment device and an electric furnace or the like; a combination thereof.

[0165] The thermocompression bonding conditions such as temperature, pressure, and time are not particularly limited, and can be designed depending on the kind and temperature of the adhesive resin film 20P. The thermocompression bonding conditions are only conditions in which the resin film is softened and sufficiently subjected to pressure and the blackout-processed glass plate 10 and the light-transmissive plate-shaped member 31 are sufficiently bonded via the adhesive film 20.

[0166] The thermocompression bonding can be performed in multiple stages by changing the method or conditions.

[0167] For example, a preferable method is a method of placing the pre-laminate in a bag made of rubber or the like, heating to 70 to 110°C in a vacuum of -65 to -100 kPa, and then pressing and heating under conditions of a temperature of about 100 to 150°C and a pressure of about 0.6 to 1.3 MPa.

[0168] When pressing in a state in which the adhesive resin film 20P is softened, the adhesive film 20 is filled between the blackout layers BL on the surface of the blackout-processed glass plate 10, and the surface irregularities in the vicinity of the boundary between the blackout-processed portion BP and the light-transmissive portion TP of the blackout-processed glass plate 10 are reduced. As a result, the perspective distortion in the vicinity of the boundary between the blackout-processed portion BP and the light-transmissive portion TP of the blackout-processed glass plate 10 is suppressed, and thus the generation of distortion in the image obtained by the optical device is suppressed.

[0169] The glass structure 1 shown in FIG. 1 is manufactured as described above. Figure 3A

[0170] [Method for manufacturing glass structure of second embodiment]

[0171] As shown in FIG. 1, the glass structure 1 is manufactured as described above. Figure 4B ​​As shown, the manufacturing method of the glass structure of the second embodiment of the present application has the following steps:

[0172] a step (S21) of preparing a plurality of glass plates 12 of which at least one has a part of a surface on which a light-blocking layer BL is formed and one has a pair of bus bars 41 formed on a surface thereof,

[0173] a step (S22) of preparing a conductive pattern film-equipped resin film EF of which the conductive pattern film 32 is formed on the adhesive resin film 20P,

[0174] a step (S23) of preparing the light-transmissive plate-shaped member 31, and

[0175] a step (S24) of superimposing and heat-bonding the glass pre-laminate PG obtained by arranging the adhesive resin film 13P with the pair of bus bars 41 located on the outermost surfaces therebetween and overlapping the plurality of glass plates 12, the conductive pattern film-equipped resin film EF, and the light-transmissive plate-shaped member 31.

[0176] (Step (S21))

[0177] As shown, the plurality of glass plates 12 of which at least one has a part of a surface on which a light-blocking layer BL is formed and one has a pair of bus bars 41 formed on a surface thereof are prepared. As necessary, the terminals 61 are formed on the pair of bus bars 41, respectively. The forming method of the light-blocking layer BL, the pair of bus bars 41, and the terminals 61 has been described above, and thus is omitted here. Figure 4B

[0178] Figure 4B is a schematic cross-sectional view corresponding to Figure 3B

[0179] (Step (S22))

[0180] In addition, as shown, the conductive pattern film 32 is formed on the adhesive resin film 20P, and the conductive pattern film-equipped resin film EF is prepared. The forming method of the conductive pattern film 32 has been described above, and thus is omitted here. Figure 4B (Step (S23))

[0181] In addition, as shown, the light-transmissive plate-shaped member 31 is prepared.

[0182] Figure 4B The order of the step (S21), the step (S22), and the step (S23) is not particularly limited, and a plurality of steps thereamong can be implemented at the same time.

[0183] (Step (S24))

[0184] As shown, the glass pre-laminate PG obtained by arranging the adhesive resin film 13P with the pair of bus bars 41 located on the outermost surfaces therebetween and overlapping the plurality of glass plates 12, the conductive pattern film-equipped resin film EF, and the light-transmissive plate-shaped member 31 are superimposed and heat-bonded.

[0185] Figure 4B ​​​​The glass pre-laminate PG was obtained by arranging the adhesive resin film 13P between the glass plates in a manner that a pair of bus bars 41 is located at the outermost surface and overlapping a plurality of glass plates 12. The glass pre-laminate PG, the conductive pattern film resin film EF, and the light-transmissive plate-like member 31 were overlapped to obtain a pre-laminate. The pre-laminate was heat-pressed.

[0186] The arrangement of the light-transmissive plate-like member 31, the arrangement of the conductive pattern film resin film EF, and the heat-pressing conditions were the same as in the process (S14).

[0187] The glass structure 1 shown in FIG. 1 was manufactured as above. Figure 3B The glass structure 1 shown in FIG. 1 was manufactured as above.

[0188] In the method for manufacturing the glass structure of the second embodiment, the manufacturing of the laminated glass and the adhesion of the light-transmissive plate-like member 31 to the laminated glass can be performed simultaneously, and thus is preferable.

[0189] Example

[0190] The present application is described below based on examples, but the present application is not limited thereto. Examples 1-1, 1-2, 3 to 6 are examples.

[0191] [Items to be evaluated and evaluation method]

[0192] (Perspective distortion)

[0193] The perspective distortion test was performed in accordance with JIS R 3212:2015 (5.12). The distance of the sample from the screen was 4 m. The installation angle of the sample with respect to the horizontal line was 25 deg. The evaluation was performed in accordance with the following criteria.

[0194] ◎ (Good): The maximum value of the perspective distortion in the light-transmissive portion (TP) was 1.5 or less;

[0195] 〇 (Good, Pass): The maximum value of the perspective distortion in the light-transmissive portion (TP) was the threshold value or less (specifically, 2.0 or less) in the front window test area A;

[0196] × (Poor): The maximum value of the perspective distortion in the light-transmissive portion (TP) was more than 2.0.

[0197] [Example 1-1]

[0198] (Process (S21))

[0199] As the material of the laminated glass, two flat glass plates (12) (square of 300 mm in length x 300 mm in width, 2 mm in thickness) were prepared.

[0200] As Figure 4BAs shown, an opaque layer (BL) was formed by applying and heating a paste containing a black pigment and a glass frit on the surface of each of the two glass sheets (12) in a manner that a central portion of each sheet was left with a square transparent portion (TP) of 40 mm x 40 mm.

[0201] Further, as shown, a pair of bus bars (41) was formed on the opaque layer (BL) of one of the glass sheets (12). As viewed from above, a pair of bus bars (41) was formed on the upper and lower sides with the transparent portion (TP) sandwiched therebetween. The bus bar (41) had a shape of a combination of a strip-shaped portion (41A) and a substantially rectangular portion (41B) as shown. The bus bar (41) was formed by printing a copper paste containing copper particles and an organic binder on a prescribed region of the opaque layer of one of the glass sheets (12) and heating the same. The thickness of the bus bar was 50 μm, and the width of the strip-shaped portion of the bus bar was 10 mm. Figure 4B Figure 2

[0202] The two glass sheets (12) were heat-formed to be curved in the longitudinal direction. The radius of curvature of the concave curved surface in the longitudinal direction was 3000 mm.

[0203] (Step (S22))

[0204] As a material for the adhesive film for bonding the light-transmissive plate-shaped member (adhesive resin film (20P)), a polyvinyl butyral (PVB) film (1 mm thick) was prepared. On the PVB film, a conductive pattern film (32) was formed as shown schematically. Figure 2 Figure 4B

[0205] (Step (S23))

[0206] As the light-transmissive plate-shaped member (31), a chemically strengthened glass (a square of 70 mm x 70 mm in length and width, 1 mm thick) was prepared.

[0207] (Step (S24))

[0208] As a material for the interlayer film of the laminated glass (adhesive resin film (13P)), a polyvinyl butyral (PVB) film (0.76 mm thick) was prepared. As shown, Figure 4B The two curved glass sheets (12) obtained in Step (S21) were sandwiched with the above-described adhesive resin film (13P) therebetween to obtain a glass pre-laminate (PG). As shown, Figure 4B ​​​​As shown, the two curved glass sheets (12) are arranged in a manner in which a pair of bus bars (41) are located on the outermost surfaces.

[0209] As shown, the above glass pre-laminate (PG), the conductive pattern film resin film (EF) obtained in the process (S22), and the light-transmissive plate-shaped member (31) prepared in the process (S23) are overlapped. Figure 4B

[0210] The light-transmissive plate-shaped member (31) is arranged in a manner in which it covers a portion of the light-transmissive portion (TP) and the light-blocking processed portion (BP) of the light-blocking processed glass sheet (10) and covers the strip-shaped portion of the bus bar (41) formed on the curved glass sheet (12). In the examples shown in Tables 1 and 2, the width of the strip-shaped portion of the bus bar (41) is almost identical to the width (W) of the overlap of the bus bar (41) and the light-transmissive plate-shaped member (31) on the light-blocking processed glass sheet (10) as viewed from above.

[0211] The conductive pattern film resin film (EF) is arranged between the glass pre-laminate (PG) and the light-transmissive plate-shaped member (31) in a manner in which the conductive pattern film (32) side is the bus bar light-blocking processed glass sheet (BG) side and the resin film (20P) side is the light-transmissive plate-shaped member (31) side. The conductive pattern film resin film (EF) is arranged between the glass pre-laminate (PG) and the light-transmissive plate-shaped member (31) in a manner in which the end portions of the electrothermal wires (32L) contained in the conductive pattern film (32) and the bus bar portion (32B) are in contact with the bus bar (41) formed on the curved glass sheet (12).

[0212] The obtained pre-laminate is thermally compressed. Specifically, the pre-laminate is placed in a bag made of rubber, heated to 110°C in a vacuum of -60 kPa, and then pressure-heated at a temperature of 150°C and a pressure of 1.3 MPa. In these processes, the light-transmissive plate-shaped member (31) is bent along the surface shape of the glass pre-laminate (PG). The longitudinal radius of curvature of the concave surface of the light-transmissive plate-shaped member (31) after thermal compression is 3000 mm.

[0213] A glass structure is obtained in the above manner. The main manufacturing conditions and evaluation results are shown in Table 1. In each of the examples of Tables 1 and 2, the conditions not described in the table are common conditions.

[0214] [Examples 1-2, 3 to 6]

[0215] A glass structure is obtained in the same manner as in Example 1-1 except that the conditions shown in Tables 1 and 2 are changed. The evaluation results are shown in Tables 1 and 2.

[0216] Each of the abbreviations in Table 1 represents the following.

[0217] PET: polyethylene terephthalate;​

[0218] OCA: Optical transparent adhesive sheet "LUCIACS (registered trademark) CS986 series" manufactured by Nitto Electric Industrial Co., Ltd. (Nitto Denko Corporation) was overlapped several times to a thickness of 1 mm.

[0219] [Table 1]

[0220]

[0221]

Table 2

[0222]

[0223] [Results]

[0224] In the glass structure bodies obtained in Examples 1-1, 1-2, and 3 to 6, the following glass structure bodies were obtained: a light-transmitting plate-shaped member thinner than the light-shielding processed glass plate was adhered to the concave curved surface (corresponding to the mounting surface of the optical device) of the light-shielding processed glass plate in a manner to cover the light-transmitting portion and a part of the light-shielding processed portion via an adhesive film, an electroconductive pattern film including a plurality of electric heating wires was provided between the light-shielding processed glass plate and the light-transmitting plate-shaped member, the plurality of electric heating wires were formed in the adhesive film, and a pair of bus bars was formed on the mounting surface of the light-shielding processed glass plate.

[0225] The perspective distortion of the obtained glass structure bodies was small and good.

[0226] The present application is not limited to the above-described embodiments and examples, and design changes can be appropriately made without departing from the gist of the present application.

[0227] This application claims priority based on Japanese Patent Application No. 2020-217145 filed on December 25, 2020, the disclosure of which is incorporated herein in its entirety.

[0228] Explanation of Symbols

[0229] 1: Glass structure body, 10: Light-shielding processed glass plate, 10A: Light-shielding processed strengthened glass, 10B: Light-shielding processed laminated glass, 10S: Mounting surface, 11: Strengthened glass, 12: Glass plate, 13: Intermediate film, 20: Adhesive film, 31: Light-transmitting plate-shaped member, 32: Electroconductive pattern film, 32L: Electric heating wire, 32B: Bus bar portion, 41: Bus bar, 61: Terminal, BG: Light-shielding processed glass plate, BL: Light-shielding layer, BP: Light-shielding processed portion, EF: Resin film with electroconductive pattern film, OP: Optical device mounting area, PG: Glass preliminary laminate, TP: Light-transmitting portion, W: Overlapping width.

Claims

1. A glass structure, comprising: a light-shielding processed glass sheet having an optical device mounting region for mounting an optical device, a light-transmitting portion through which incident light incident from the outside to the optical device and / or emergent light emergent from the optical device is transmitted, and a light-shielding processed portion surrounding at least a part of the light-transmitting portion; a light-transmitting sheet-like member thinner than the light-shielding processed glass sheet mounted on a mounting surface of the optical device of the light-shielding processed glass sheet so as to cover the light-transmitting portion and a part of the light-shielding processed portion; and a conductive pattern film containing one or more electric heating wires formed between the light-shielding processed glass sheet and the light-transmitting sheet-like member, wherein the light-transmitting sheet-like member is bonded to the light-shielding processed glass sheet via a bonding film, the electric heating wire is formed in the bonding film, and a pair of bus bars for supplying electric power to the one or more electric heating wires is formed on the mounting surface of the light-shielding processed glass sheet.

2. The glass structure according to claim 1, wherein a part of the bus bar overlaps the light-transmitting sheet-like member in plan view, and at least a part of the one or more electric heating wires is in contact with the bus bar.

3. The glass structure according to claim 1 or 2, wherein a part of the bus bar overlaps the light-transmitting sheet-like member in plan view, the conductive pattern film contains the one or more electric heating wires and a pair of bus bar portions, at least a part of the bus bar portions contained in the conductive pattern film is in contact with the bus bar on the light-shielding processed glass sheet, and a terminal is mounted on each of the pair of bus bars on the light-shielding processed glass sheet.

4. The glass structure according to any one of claims 1 to 3, wherein the light-shielding processed glass sheet is a laminated glass in which a light-shielding layer is formed in a part of the interior and / or surface or a strengthened glass in which a light-shielding layer is formed in a part of the surface.

5. The glass structure according to claim 4, wherein the light-shielding processed glass sheet is a laminated glass in which a light-shielding layer is formed in a part of the interior and / or surface, and the bonding film is thinner than an interlayer film of the laminated glass.

6. The glass structure according to any one of claims 1 to 5, wherein the light-transmitting sheet-like member is composed of glass and / or resin.

7. The glass structure according to any one of claims 1 to 6, wherein the bonding film has a thickness of 0.02 to 1 mm.

8. The glass structure according to any one of claims 1 to 7, wherein a ratio of a thickness of the bus bar to a thickness of the light-transmitting sheet-like member is 0.05 or less.

9. The glass structure according to any one of claims 1 to 8, wherein an overlapping width of the bus bar on the light-shielding processed glass sheet with the light-transmitting sheet-like member in plan view is 2 to 15 mm.

10. The glass structure according to any one of claims 1 to 9, wherein the light-transmitting sheet-like member has a thickness of 1 mm or less.

11. The glass structure according to any one of claims 1 to 10, wherein a radius of curvature of an inner surface of the light-shielding processed glass sheet and the light-transmitting sheet-like member is 1000 to 20000 mm.

13. A method for manufacturing the glass structure according to any one of claims 1 to 12, comprising the steps of: a step (S11) of preparing a bus bar-equipped light-shielding processed glass sheet in which the pair of bus bars is formed on the light-shielding processed glass sheet, a step (S12) of preparing a conductive pattern film-equipped resin film in which the conductive pattern film is formed on a resin film for bonding, a step (S13) of preparing the light-transmitting sheet-like member, and ​ ​ ​ 4. The glass structure of claim 1 or 2, wherein, ​ 5. The glass structure of claim 1 or 2, wherein, ​ 6. The glass structure of claim 1 or 2, wherein, ​ 7. The glass structure of claim 1 or 2, wherein ​ 8. The glass structure of claim 1 or 2, wherein, ​ 9. The glass structure of claim 1 or 2, wherein, ​ 10. The glass structure of claim 2, wherein, ​ 11. The glass structure of claim 1 or 2, wherein, ​ 12. The glass structure of claim 1 or 2, wherein, ​ ​ ​ ​ ​ overlapping and thermally pressure-bonding the light-shielding processed glass plate, the conductive pattern film-equipped resin film, and the light-transmissive plate-shaped member (S14).

14. The method for producing a glass structure according to any one of claims 1 to 12, wherein the light-shielding processed glass plate is a laminated glass in which a light-shielding layer is formed in a part of the inside and / or surface, and the method has the following steps: a step (S21) of preparing a plurality of glass plates of which at least one has a light-shielding layer formed in a part of the surface and one has the pair of bus bars formed on the surface, a step (S22) of preparing a conductive pattern film-equipped resin film in which a conductive pattern film is formed on an adhesive resin film, a step (S23) of preparing the light-transmissive plate-shaped member, and a step (S24) of overlapping and thermally pressure-bonding a glass pre-laminate obtained by arranging the adhesive resin film with the pair of bus bars located on the outermost surfaces between the plurality of glass plates and overlapping the plurality of glass plates, the conductive pattern film-equipped resin film, and the light-transmissive plate-shaped member.

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