Laminated glass, manufacturing method thereof and vehicle

Abstract

The invention provides laminated glass, a manufacturing method thereof and a vehicle. The laminated glass comprises a glass body and a first heating layer. The glass body comprises an outer glass plate, a bonding layer and an inner glass plate which are arranged in a laminated manner, the bonding layer is used for bonding the outer glass plate and the inner glass plate together, and the glass body is provided with a signal transmission area for a signal of a sensor to transmit. The first heating layer is fixedly arranged on the bonding layer, the first heating layer comprises a transparent heating film made of a carbon nanotube material, the orthographic projection of the transparent heating film on the glass body at least covers the signal transmission area, and the transparent heating film is used for generating heat when being electrified. In the laminated glass provided by the invention, at least the transparent heating film covering the signal transmission area is made of the carbon nanotube material, and the appearance is transparent and invisible, so that the influence on the signal transmission rate of the sensor can be reduced or even avoided, and the working effect of the sensor can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of glass, and in particular to a laminated glass and a manufacturing method thereof, and a vehicle. Background Art

[0002] Intelligent driving and networking of vehicles are the main directions of future development. Generally, optical sensors are installed on the inner side of the window glass to realize intelligent driving of the vehicle. In addition, in order to realize the defrosting and defogging function of the window glass, the window glass is usually heated by heating wires such as silver paste, enameled wire, tungsten wire, etc., which are visible in appearance, or by transparent heating films such as silver-based film, indium tin oxide (ITO), fluoride tin doped tin oxide (FTO), etc. The window glass is heated. However, the heating wire has a certain shielding effect on the optical sensor inside the vehicle, and the transparent heating film containing metal materials will reduce the transmittance of the optical signal of the sensor, thereby affecting the working effect of the optical sensor. Summary of the invention

[0003] The present invention aims to solve at least one of the problems existing in the prior art. To this end, the present invention provides a laminated glass and a manufacturing method thereof, and a vehicle, wherein the laminated glass includes a transparent heating film that at least covers a signal transmission area, and the transparent heating film is made of carbon nanotubes, and has a transparent appearance and is invisible, which can reduce or even avoid the influence on the signal transmittance of the sensor, and is conducive to improving the working effect of the sensor.

[0004] In order to achieve the above object, in a first aspect, the present invention provides a laminated glass, comprising:

[0005] A glass body, comprising an outer glass plate, an adhesive layer and an inner glass plate which are stacked, wherein the adhesive layer bonds the outer glass plate and the inner glass plate together, and the glass body has a signal transmission area for a sensor signal to transmit;

[0006] A first heating layer is arranged between the outer glass plate and the inner glass plate, and the first heating layer includes a transparent heating film made of a carbon nanotube material. Along the thickness direction of the glass body, the orthographic projection of the transparent heating film on the glass body at least covers the signal transmission area, and the transparent heating film is used to generate heat when power is turned on.

[0007] Further, the laminated glass further comprises a first busbar, a second busbar and a shielding layer; the first busbar and the second busbar are arranged between the outer glass plate and the inner glass plate; the shielding layer is arranged on a surface of the outer glass plate facing the inner glass plate and / or at least one surface of the inner glass plate in a thickness direction, and at least shields the first busbar and the second busbar;

[0008] Among them, the first busbar includes a first extension portion, the second busbar includes a second extension portion, the first extension portion and the second extension portion are spaced apart at opposite sides of the signal transmission area in a preset direction and are electrically connected to the transparent heating film respectively; when the first busbar and the second busbar are connected to the power supply, the transparent heating film is energized to generate heat.

[0009] Further, the signal transmission area includes a top edge and a bottom edge spaced apart along a first direction, the bottom edge is located on a side of the top edge close to a central area of ​​the glass body, a length a of the top edge along a second direction is smaller than a length b of the bottom edge along the second direction, and the second direction is perpendicular to the first direction;

[0010] The shielding layer is also used to shield the area of ​​the glass body located at the periphery of the signal transmission area, and the first extension portion and the second extension portion are arranged in parallel and spaced apart at opposite sides of the signal transmission area in the first direction;

[0011] The power supply voltage of the power supply is low voltage, and the distance c between the first extension portion and the second extension portion is smaller than the length b of the bottom edge along the second direction.

[0012] Further, a distance c between the first extension portion and the second extension portion is smaller than a length a of the top edge along the second direction.

[0013] Further, the signal transmission area includes a top edge and a bottom edge spaced apart along a first direction, the bottom edge is located on a side of the top edge close to a central area of ​​the glass body, a length a of the top edge along a second direction is smaller than a length b of the bottom edge along the second direction, and the second direction is perpendicular to the first direction;

[0014] The shielding layer is also used to shield the area of ​​the glass body located at the periphery of the signal transmission area, and the first extension portion and the second extension portion are arranged in parallel and spaced apart at opposite sides of the signal transmission area in the second direction;

[0015] The power supply voltage of the power supply is high voltage, and the distance c between the first extension portion and the second extension portion is greater than the length b of the bottom edge along the second direction.

[0016] Further, the signal transmission area includes a top edge and a bottom edge spaced apart along a first direction, the bottom edge is located on a side of the top edge close to a central area of ​​the glass body, a length a of the top edge along a second direction is smaller than a length b of the bottom edge along the second direction, and the second direction is perpendicular to the first direction;

[0017] The shielding layer is further used to shield the area of ​​the glass body adjacent to the top edge and the area of ​​the glass body adjacent to the opposite sides of the signal transmission area in the second direction, and the first extension portion and the second extension portion are arranged at intervals on the opposite sides of the signal transmission area in the second direction;

[0018] Among them, the distance c1 between the first end of the first extension portion close to the top edge and the first end of the second extension portion close to the top edge is greater than the length a of the top edge along the second direction and less than the length b of the bottom edge along the second direction, and the distance c2 between the second end of the first extension portion close to the bottom edge and the second end of the second extension portion close to the bottom edge is greater than the length b of the bottom edge along the second direction.

[0019] Furthermore, the power supply voltage of the power supply is in the range of 12V to 16V, and the surface resistance of the transparent heating film is less than 50ops.

[0020] Furthermore, the surface resistance of the transparent heating film is less than 30 ops.

[0021] Furthermore, the power supply voltage of the power supply is in the range of 36V to 48V, and the surface resistance of the transparent heating film is greater than 50ops.

[0022] Furthermore, the surface resistance of the transparent heating film is greater than 100 ops.

[0023] Furthermore, a first end of the first extension portion is away from a side of the signal transmission area and has a first distance d1 from a first boundary of the shielding layer in the second direction, and the first boundary is located on a side of the first extension portion away from the signal transmission area;

[0024] A second end of the first extension portion close to the side of the signal transmission area and a second boundary of the shielding layer have a second distance d2 in the second direction, and the second boundary is located between the first extension portion and the signal transmission area;

[0025] A third distance d3 is formed between the first end of the second extension portion away from the side of the signal transmission area and the third boundary of the shielding layer in the second direction, and the third boundary is located on the side of the second extension portion away from the signal transmission area;

[0026] A fourth distance d4 is formed between the second end of the second extension portion close to the side of the signal transmission area and the fourth boundary of the shielding layer in the second direction, and the fourth boundary is located between the second extension portion and the signal transmission area;

[0027] Wherein, at least one of the first interval d1, the second interval d2, the third interval d3, and the fourth interval d4 is equal to a preset threshold.

[0028] Furthermore, the value range of the preset threshold is greater than or equal to 3 mm.

[0029] Further, the signal transmission area has a first side and a second side in the second direction, the first side is adjacent to the first extension portion, the second side is adjacent to the second extension portion, the area between the first side and the first extension portion is defined as a first edge area, and the area between the second side and the second extension portion is defined as a second edge area;

[0030] A distance L1 between the first end of the first extension portion and a corresponding end of the first side edge is greater than a distance L2 between the second end of the first extension portion and a corresponding end of the first side edge, the transparent heating film covers the first edge area, and a portion of the transparent heating film covering the first edge area is provided with a hollow pattern, and / or a distance L3 between the first end of the second extension portion and a corresponding end of the second side edge is greater than a distance L4 between the second end of the second extension portion and a corresponding end of the second side edge, the transparent heating film covers the second edge area, and a portion of the transparent heating film covering the second edge area is provided with a hollow pattern;

[0031] Wherein, the hollow pattern includes a plurality of hollow holes, and the plurality of hollow holes are selected from one of circular holes, elliptical holes, polygonal holes, or a combination of at least two of them.

[0032] Furthermore, along the second direction, the hollow area of ​​the portion of the transparent heating film close to the signal transmission area is smaller than the hollow area of ​​the portion of the transparent heating film far from the signal transmission area;

[0033] Alternatively, along the first direction, a hollow area of ​​a portion of the transparent heating film close to the top edge is larger than a hollow area of ​​a portion of the transparent heating film close to the bottom edge.

[0034] Further, the first extension portion is located at a side of the bottom edge away from the top edge, the second extension portion is located at a side of the top edge away from the bottom edge, and the length of the second extension portion along the second direction is less than the length of the first extension portion along the second direction;

[0035] The second busbar further includes two stepped portions, and the two stepped portions are respectively connected to opposite ends of the second extension portion in the second direction;

[0036] Wherein, each of the step portions includes one or more step sections, each of the step sections is in a U-shaped structure and the extension length along the second direction is less than 1 / 2 of the length of the second extension portion along the second direction, the open end of each of the step sections faces away from the signal transmission area, the multiple step sections are distributed between the first extension portion and the second extension portion at intervals along the first direction and are connected end to end in sequence, and the open ends of the multiple step sections are flush or nearly flush; along the direction of the second extension portion approaching the first extension portion, the lengths of the multiple step sections along the second direction decrease successively.

[0037] Furthermore, the first heating layer further comprises a substrate, and the transparent heating film is fixedly arranged on the surface of the substrate facing the outer glass plate, or the transparent heating film is fixedly arranged on the surface of the substrate facing the inner glass plate.

[0038] Furthermore, the transparent heating film is directly deposited on the surface of the substrate by chemical vapor deposition or physical vapor deposition.

[0039] Furthermore, the transparent heating film is directly deposited on the surface of the substrate by a floating catalyst chemical vapor deposition method.

[0040] Furthermore, the first heating layer further comprises a protective film made of a polymer material, and the protective film covers the surface of the transparent heating film facing away from the substrate.

[0041] Furthermore, the material of the substrate is selected from at least one of PET, PVB, PC and modified CPI, and / or the thickness of the substrate is 10 μm to 500 μm.

[0042] Furthermore, the adhesive layer is provided with a receiving groove, the orthographic projection of the receiving groove on the glass body at least covers the signal transmission area, and the first heating layer is fixedly disposed in the receiving groove.

[0043] Further, the adhesive layer includes a first sub-adhesive layer and a second sub-adhesive layer stacked on each other, the first sub-adhesive layer includes a first adhesive surface and a second adhesive surface opposite to each other, the second sub-adhesive layer includes a third adhesive surface and a fourth adhesive surface opposite to each other, the second adhesive surface is laminated to the third adhesive surface, the outer glass plate is laminated to the first adhesive surface, and the inner glass plate is laminated to the fourth adhesive surface;

[0044] The first sub-adhesive layer has the receiving groove formed from the second adhesive surface, or the second sub-adhesive layer has the receiving groove formed from the third adhesive surface; or the first sub-adhesive layer has the first sub-receiving groove formed from the second adhesive surface, and the second sub-receiving groove formed from the third adhesive surface, and the second sub-receiving groove is opposite to the first sub-receiving groove and together constitutes the receiving groove.

[0045] Furthermore, the adhesive layer is a single layer, and includes a first adhesive surface and a second adhesive surface opposite to each other, the outer glass plate is bonded to the first adhesive surface, and the inner glass plate is bonded to the second adhesive surface;

[0046] Wherein, the adhesive layer is provided with the accommodating groove from the first adhesive surface or the second adhesive surface.

[0047] Furthermore, the laminated glass further comprises an optical adhesive layer, and the optical adhesive layer bonds the bottom of the accommodating groove and the surface of the first heating layer facing the bottom of the groove together.

[0048] Furthermore, the signal transmitted by the signal transmission area is an optical camera signal or a laser radar signal in the 905nm band, and the material of the adhesive layer is PVB;

[0049] Alternatively, the signal transmitted by the signal transmission area is a laser radar signal in the 1550nm band, and the material of the adhesive layer is EVA.

[0050] In a second aspect, the present invention provides a method for manufacturing laminated glass, the manufacturing method comprising:

[0051] Providing an adhesive layer, and opening a receiving groove in a preset area of ​​the adhesive layer;

[0052] Providing a substrate, and depositing a transparent heating film made of carbon nanotubes on one surface of the substrate, wherein the substrate and the transparent heating film constitute a first heating layer;

[0053] The first heating layer is fixedly disposed in the receiving groove of the adhesive layer, and the transparent heating film at least covers the signal transmission area;

[0054] An outer glass plate and an inner glass plate are provided, and the outer glass plate and the inner glass plate are respectively laminated on opposite sides of the adhesive layer, and then laminated to obtain a laminated glass.

[0055] Furthermore, the transparent heating film is directly deposited on the surface of the substrate by a floating catalyst chemical vapor deposition method.

[0056] In a third aspect, the present invention provides a vehicle, comprising a vehicle frame and the laminated glass as described above, wherein the vehicle frame is used to carry the laminated glass;

[0057] Wherein, the vehicle further comprises a sensor located inside the vehicle, and the sensor is arranged opposite to the signal transmission area.

[0058] In the laminated glass, its manufacturing method, and vehicle provided by the present invention, the laminated glass includes a glass body and a first heating layer, the first heating layer includes a transparent heating film that at least covers the signal transmission area of ​​the glass body, and the transparent heating film is made of carbon nanotube material, so that the appearance of the first heating layer is transparent and invisible, which can reduce or even avoid the impact on the signal transmittance of the sensor, thereby helping to improve the working effect of the sensor.

[0059] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0061] Figure 1 It is a schematic diagram of the partial structure of the laminated glass provided by the first embodiment of the present invention.

[0062] Figure 2 yes Figure 1 A partial enlarged view of the laminated glass shown.

[0063] Figure 3 yes Figure 2 A partial cross-sectional view of the laminated glass shown.

[0064] Figure 4 yes Figure 2 A partial cross-sectional view of a laminated glass in another embodiment is shown.

[0065] Figure 5 yes Figure 2 A partial enlarged view of a laminated glass in another embodiment is shown.

[0066] Figure 6 It is a partial enlarged view of the laminated glass provided by the second embodiment of the present invention.

[0067] Figure 7 It is a partial enlarged view of the laminated glass provided by the third embodiment of the present invention.

[0068] Figure 8 It is a partial enlarged view of the laminated glass provided by the fourth embodiment of the present invention.

[0069] Fig. 9 yes Figure 8 A schematic diagram of a laminated glass in one embodiment is shown.

[0070] Fig.10 yes Figure 8 A schematic diagram of a laminated glass in another embodiment is shown.

[0071] Fig.11 It is a partial enlarged view of the laminated glass provided by the fifth embodiment of the present invention.

[0072] Fig.12 It is a flow chart of a method for manufacturing laminated glass provided by an embodiment of the present invention.

[0073] Description of main reference numerals:

[0074] 100-laminated glass; 101-signal transmission area; 102-light transmission area; 103-non-light transmission area; 10-outer glass plate; 11-first surface; 12-second surface; 20-adhesive layer; 21-first sub-adhesive layer; 22-second sub-adhesive layer; 30-inner glass plate; 31-third surface; 32-fourth surface; 40-first heating layer; 41-transparent heating film; 42-substrate; 50-first bus bar; 51-first extension part; 52-first guide part; 60-second bus bar; 61-second extension part; 62-second guide part; 63-step part; 71-first shielding layer; 72-second shielding layer; 81-first lead wire; 82-second lead wire; 90-hollow pattern. DETAILED DESCRIPTION

[0075] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0076] It should be noted that in the description of the present invention, the terms "first", "second", etc. are used to distinguish different objects rather than to describe a specific order, and the term "plurality" refers to at least two, and therefore cannot be understood as a limitation on the present invention. In addition, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through other elements, or the internal connection of two elements; it can be a communication connection or an electrical connection, wherein both communication connection and electrical connection also include direct connection or indirect connection through other elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] See also Figure 1 The embodiment of the present invention provides a laminated glass 100, which is used to be installed in the opening of vehicles, ships and other transportation vehicles, so as to serve as a windshield, side window glass or skylight glass. The laminated glass 100 can be a flat glass, a curved glass with a curvature in a single direction, or a double-curved glass with the same or different curvatures in two directions. For example, Figure 1 As shown, in one embodiment of the present invention, the laminated glass 100 can be used as a front windshield of a vehicle. The laminated glass 100 has a longitudinal direction ( Figure 1 left-right direction) and width direction ( Figure 1 The laminated glass 100 has different curvatures in the upper and lower directions (as shown), and is a double-curved glass.

[0078] For details, please refer to Figures 1 to 3 In an embodiment of the present invention, the laminated glass 100 includes an outer glass plate 10, an adhesive layer 20 and an inner glass plate 30, wherein the adhesive layer 20 bonds the outer glass plate 10 and the inner glass plate 30 together to form a glass body of the laminated glass 100. In an embodiment of the present invention, the glass body has a signal transmission area 101 for the sensor signal to pass through. The sensor may be, but is not limited to, a millimeter wave radar, a laser radar, an infrared camera and a visible light camera, and the area of ​​the signal transmission area 101 is equal to or greater than the area of ​​the area where the actual signal of the sensor passes through.

[0079] Please combine Figure 1 and Figure 3In an embodiment of the present invention, the laminated glass 100 further includes a first heating layer 40 disposed between the outer glass plate 10 and the inner glass plate 30. Preferably, the first heating layer 40 is fixedly disposed in the adhesive layer 20. The first heating layer 40 includes a transparent heating film 41 made of a carbon nanotube material. Along the thickness direction of the glass body, the orthographic projection of the transparent heating film 41 on the glass body at least covers the signal transmission area 101, and the transparent heating film 41 is used to generate heat when powered on, so that the laminated glass 100 has a heating function at least in the signal transmission area 101, thereby preventing the inner surface of the laminated glass 100 corresponding to the signal transmission area 101 from fogging, frosting or ice.

[0080] Existing electrically heated glass generally uses visible silver paste, enameled wire, tungsten wire and other heating wires to heat the signal transmission area, or uses transparent heating films such as silver-based film, indium tin oxide (ITO), fluoride tin doped tin oxide (FTO) that will reduce the sensor signal transmittance to heat the signal transmission area. In contrast, in an embodiment of the present invention, the transparent heating film 41 used to heat the signal transmission area 101 is made of carbon nanotube material. Since the carbon nanotube material has excellent mechanical properties, electrical conductivity, heat transfer properties and optical properties, the transparent heating film 41 can not only heat the signal transmission area 101, but also make the appearance of the transparent heating film 41 transparent and invisible, thereby improving the aesthetics of the laminated glass 100, and can reduce or even avoid the impact on the signal transmittance of the sensor, which is beneficial to improving the working effect of the sensor.

[0081] It should be noted that, in the embodiment of the present invention, the laminated glass 100 further includes a busbar and a shielding layer fixedly disposed between the outer glass plate 10 and the inner glass plate 30. The busbar is used to be connected between the power supply and the transparent heating film 41 so as to provide heating current to the transparent heating film 41 through the power supply; the shielding layer is used to shield the busbar and a part of the laminated glass 100 (e.g., the edge area) so as to enhance the aesthetics of the laminated glass 100 and protect sensor components, which will be described later.

[0082] The following will be combined Figures 1 to 11 , taking the laminated glass 100 as a front windshield of a vehicle as an example, the structure of the laminated glass 100 provided in an embodiment of the present invention is further described.

[0083] like Figure 3As shown, in the embodiment of the present invention, the outer glass plate 10 has a first surface 11 and a second surface 12 opposite to each other, the inner glass plate 30 has a third surface 31 and a fourth surface 32 opposite to each other, the second surface 12 and the third surface 31 are arranged opposite to each other, and the adhesive layer 20 is connected between the second surface 12 and the third surface 31. When the laminated glass 100 is installed on a vehicle, the outer glass plate 10 is located on the outer side of the vehicle, and the first surface 11 is the outer surface of the laminated glass 100 exposed outside the vehicle; the inner glass plate 30 is located on the inner side of the vehicle, and the fourth surface 32 is the inner surface of the laminated glass 100 exposed inside the vehicle. Wherein, the outer glass plate 10 and the inner glass plate 30 are both double-curved glass.

[0084] Specifically, the outer glass plate 10 is subjected to a high temperature bending and forming treatment at least 500° C., and the thickness of the outer glass plate 10 can be 1.6 mm to 5.0 mm, for example, 1.6 mm, 1.8 mm, 2.1 mm, 2.6 mm, 3.2 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, etc. In addition, the outer glass plate 10 can be any one of transparent glass or colored glass, such as transparent glass with a visible light transmittance of 85% to 93%, ordinary green glass with a visible light transmittance of 73% to 88%, solar green glass with a visible light transmittance of 70% to 85.5%, light gray glass or dark green glass with a visible light transmittance of 25% to 50%. In some embodiments of the present invention, when the laminated glass 100 is provided with vehicle sensors such as cameras and lidars, the thickness of the outer glass plate 10 is preferably 1.8 mm or 2.1 mm, and the material of the outer glass plate 10 is selected from transparent glass, ordinary green glass or solar green glass, preferably solar green glass with light absorption function.

[0085] Similar to the outer glass plate 10, the inner glass plate 30 is subjected to a high temperature bending process of at least 500°C, and the thickness of the inner glass plate 30 can be 1.6 mm to 5.0 mm, such as 1.6 mm, 1.8 mm, 2.1 mm, 2.6 mm, 3.2 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, etc. In addition, the inner glass plate 30 can be any one of transparent glass or colored glass such as transparent glass with a visible light transmittance of 85% to 93%, ordinary green glass with a visible light transmittance of 73% to 88%, solar green glass with a visible light transmittance of 70% to 85.5%, light gray glass or dark green glass with a visible light transmittance of 25% to 50%. In some embodiments of the present invention, when the laminated glass 100 is provided with vehicle sensors such as a camera and a lidar, the thickness of the inner glass plate 30 is preferably 1.8 mm or 2.1 mm, and the material of the inner glass plate 30 is selected from transparent glass, ordinary green glass or solar green glass, with transparent glass being preferred.

[0086] The adhesive layer 20 may also be referred to as a thermoplastic intermediate layer. The material of the adhesive layer 20 may be, but is not limited to, polycarbonate (PC), polyvinyl chloride (PVC), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR), ionic polymer film (SGP), etc. It should be noted that in some embodiments of the present invention, when the signal transmission area 101 (see Figure 2 ) The signal for transmission is an optical camera signal or a laser radar signal in the 905nm band, and the material of the adhesive layer 20 is preferably polyvinyl butyral (PVB); in other embodiments of the present invention, the signal transmission area 101 is used to transmit a laser radar signal in the 1550nm band, and the material of the adhesive layer 20 is preferably ethylene vinyl acetate (EVA).

[0087] Of course, the adhesive layer 20 can also be selected to have a local coloring function, for example: at least one colored area is set on the top of the laminated glass 100 as a shadow band to reduce the interference of sunlight to the human eye, and for example, a colored area is set at the bottom of the laminated glass 100 to play a shielding role; it can also be composed of two or three layers of thermoplastic polymer films with colored bottom or top of the laminated glass 100 and transparent middle visible area. When the adhesive layer 20 is a transparent thermoplastic adhesive layer, the visible light transmittance of the transparent thermoplastic adhesive layer is greater than or equal to 80%. For example, the visible light transmittance of the adhesive layer 20 can be but not limited to 80%, or 85%, or 90%, or 95%. When the adhesive layer 20 is a colored thermoplastic intermediate layer, the visible light transmittance of the colored thermoplastic intermediate layer is greater than 70%. For example, the visible light transmittance of the adhesive layer 20 can be but not limited to 75%, or 80%, or 85%, or 90%, etc. In addition, the adhesive layer 20 may also be added with an infrared absorber so as to have heat and light absorption functions. The adhesive layer 20 may also include at least two layers, one of which has a higher plasticizer content so as to have a sound insulation function.

[0088] In an embodiment of the present invention, the outer glass plate 10, the adhesive layer 20, and the inner glass plate 30 are processed by the high-pressure lamination process of automotive glass to form the glass body of the laminated glass 100. The laminated glass 100 can meet the use requirements of Chinese standards and automotive glass standards in Europe, the United States and other countries.

[0089] Please refer again Figure 3 In some embodiments of the present invention, the first heating layer 40 further includes a substrate 42, and the transparent heating film 41 is fixedly disposed on the surface of the substrate 42 facing the inner glass plate 30. Of course, in other embodiments of the present invention, the transparent heating film 41 may also be fixedly disposed on the surface of the substrate 42 facing the outer glass plate 10. It can be understood that by using the substrate 42 to carry the transparent heating film 41, the transparent heating film 41 can be prevented from curling when the laminated glass 100 is subjected to a high-pressure lamination process.

[0090] Optionally, the transparent heating film 41 can be directly deposited on the surface of the substrate 42 by chemical vapor deposition (CVD) or physical vapor deposition (PVD), preferably directly deposited on the surface of the substrate 42 by floating catalyst chemical vapor deposition (FCCVD).

[0091] Also optionally, the material for making the substrate 42 can be selected from at least one of polyethylene terephthalate (PET), vinyl butyral (PVB), polycarbonate (PC) and modified transparent polyimide (CPI), preferably polyethylene terephthalate (PET) material with good mechanical properties, high transparency and good gloss, and / or the thickness of the substrate 42 is 10μm to 500μm, preferably 50μm or 100μm.

[0092] Also optionally, in some embodiments of the present invention, the first heating layer 40 also includes a protective film (not shown in the figure) made of a polymer material, and the protective film covers the surface of the transparent heating film 41 facing away from the substrate 42 to protect the transparent heating film 41 from being contaminated by the external environment.

[0093] Please also read Figure 3 and Figure 4 In an embodiment of the present invention, the first heating layer 40 is fixedly disposed in the adhesive layer 20. Specifically, Figure 3 and Figure 4 As shown, the adhesive layer 20 is provided with a receiving groove (not numbered in the figure), and the orthographic projection of the receiving groove on the glass body at least covers the signal transmission area 101 (see Figure 2 ), the first heating layer 40 is fixedly disposed in the receiving groove. It can be understood that by directly bonding and fixing the first heating layer 40 in the receiving groove of the adhesive layer 20, not only the fixing operation of the first heating layer 40 is simple and quick, but also the first heating layer 40 does not need to be filled in the entire gap between the outer glass plate 10 and the inner glass plate 30, the thickness of the first heating layer 40 can be reduced, thereby reducing the cost.

[0094] Of course, in other embodiments of the present invention, the adhesive layer 20 may be provided with receiving holes extending through two opposite sides thereof along the thickness direction, and the first heating layer 40 is filled in the receiving holes.

[0095] Alternatively, if Figure 3As shown, in some embodiments of the present invention, the adhesive layer 20 includes a first sub-adhesive layer 21 and a second sub-adhesive layer 22 which are stacked on each other. The first sub-adhesive layer 21 includes a first adhesive surface and a second adhesive surface which are opposite to each other, and the second sub-adhesive layer 22 includes a third adhesive surface and a fourth adhesive surface which are opposite to each other, and the second adhesive surface and the third adhesive surface are bonded together, the outer glass plate 10 is bonded to the first adhesive surface of the first sub-adhesive layer 21, and the inner glass plate 30 is bonded to the fourth adhesive surface of the second sub-adhesive layer 22, so that the outer glass plate 10 and the inner glass plate 30 are bonded together through the double-layer adhesive layer 20. The first heating layer 40 is fixed by the double-layer adhesive layer, which increases the bonding force to the first heating layer 40, makes the bonding stability between the first heating layer 40 and the adhesive layer 20 higher, helps to improve the structural stability of the laminated glass 100, and can prevent the first heating layer 40 from wrinkling during high-pressure lamination.

[0096] exist Figure 3 In the example, the second sub-adhesive layer 22 is provided with the accommodating groove from the third adhesive surface, and the first heating layer 40 is fixedly disposed in the second sub-adhesive layer 22 .

[0097] Optionally, in other embodiments of the present invention, the first sub-adhesive layer 21 can be provided with the accommodating groove from the second adhesive surface, and the first heating layer 40 is fixedly arranged in the first sub-adhesive layer 21; or, the first sub-adhesive layer 21 is provided with a first sub-accommodating groove from the second adhesive surface, and the second sub-adhesive layer 22 is provided with a second sub-accommodating groove from the third adhesive surface, the second sub-accommodating groove is opposite to the first sub-accommodating groove and together constitutes the accommodating groove, a part of the first heating layer 40 is fixedly arranged in the first sub-adhesive layer 21, and another part of the first heating layer 40 is fixedly arranged in the second sub-adhesive layer 22.

[0098] like Figure 4 As shown, in other embodiments of the present invention, the adhesive layer 20 can be a single layer, and the adhesive layer 20 includes a first adhesive surface and a second adhesive surface opposite to each other, the outer glass plate 10 is bonded to the first adhesive surface, and the inner glass plate 30 is bonded to the second adhesive surface, so that the outer glass plate 10 and the inner glass plate 30 are bonded together by the adhesive layer 20 of a single layer structure. The adhesive layer 20 can be provided with the receiving groove from the first adhesive surface or the second adhesive surface for arranging the first heating layer 40. It is not difficult to understand that the first heating layer 40 is fixed by the single layer of adhesive layer 20, which helps to reduce the thickness of the adhesive layer 20.

[0099] Preferably, Figure 3 or Figure 4 In the example, the laminated glass 100 may further include an optical adhesive layer, which is used to bond the bottom of the accommodating groove and the surface of the first heating layer 40 facing the bottom of the groove together, thereby further improving the bonding stability between the first heating layer 40 and the adhesive layer 20.

[0100] Please refer again Figures 1 to 3 In an embodiment of the present invention, the laminated glass 100 further includes a shielding layer, a first busbar 50 and a second busbar 60, wherein the first busbar 50 and the second busbar 60 are fixedly disposed between the outer glass plate 10 and the inner glass plate 30, the shielding layer is disposed on the second surface 12 of the outer glass plate 10 facing the inner glass plate 30 and / or at least one surface of the inner glass plate 30 in the thickness direction (i.e., the third surface 31 and / or the fourth surface 32), and the orthographic projection of the shielding layer on the glass body at least covers the orthographic projections of the first busbar 50 and the second busbar 60 on the glass body. In other words, the shielding layer at least shields the first busbar 50 and the second busbar 60.

[0101] Specifically, Figure 2 As shown, the first busbar 50 includes a first extension portion 51, and the second busbar 60 includes a second extension portion 61. The first extension portion 51 and the second extension portion 61 are arranged at intervals on opposite sides of the signal transmission area 101 in a preset direction and are both electrically connected to the transparent heating film 41. In this way, when the first busbar 50 and the second busbar 60 are connected to a power supply (not shown in the figure), the heating current provided by the power supply can flow through the transparent heating film 41 through the first busbar 50 and the second busbar 60. The transparent heating film 41 generates heat and generates heat under the action of the heating current, so that the laminated glass 100 has defrosting, defogging, deicing and other functions at least in the signal transmission area 101. The first busbar 50 and the second busbar 60 can both be metal foils, conductive silver pastes, etc.

[0102] Among them, Figure 3As shown, the first busbar 50 and the second busbar 60 are both fixedly disposed in the adhesive layer 20 and are located on the side of the transparent heating film 41 facing away from the substrate 42. It should be noted that after the transparent heating film 41 is deposited and formed on the surface of the substrate 42, the first busbar 50 and the second busbar 60 can be disposed on the side of the transparent heating film 41 facing away from the substrate 42 by printing, spraying, sputtering or bonding, and can be cut accordingly according to the specific busbar design scheme. Such operation can not only ensure that the first busbar 50 and the second busbar 60 have good conductive properties, but also help reduce costs and improve the flexibility of busbar design.

[0103] like Figure 1 and Figure 3 As shown, the shielding layer is composed of a first shielding layer 71 and a second shielding layer 72. The first shielding layer 71 is used to shield at least part of the peripheral area of ​​the signal transmission area 101 to shield the first extension portion 51 and the second extension portion 61. The second shielding layer 72 is used to shield the peripheral edge area of ​​the laminated glass 100, so as to divide the laminated glass 100 into a light-transmitting area 102 and a non-light-transmitting area 103. The light-transmitting area 102 is located in the central area of ​​the laminated glass 100, and the non-light-transmitting area 103 is located in the peripheral area of ​​the laminated glass 100. The light-transmitting area 102 has a relatively high visible light transmittance that meets safety standards, for example, greater than or equal to 70%; the visible light transmittance of the non-light-transmitting area 103 can be set according to actual applications, for example, less than or equal to 5%, preferably less than or equal to 1.5%. It can be understood that the shielding layer can shield and protect the components inside the vehicle, thereby ensuring the overall aesthetic appearance when observed from the outside, and at the same time prevent the components inside the vehicle from aging and damage caused by direct sunlight, so as to increase the service life of the components inside the vehicle. In addition, the shielding layer can also improve the local adhesion of the laminated glass 100.

[0104] Alternatively, if Figure 3 As shown, in some embodiments of the present invention, the shielding layer (the first shielding layer 71 and the second shielding layer 72) is disposed on the second surface 12 of the outer glass plate 10. In other embodiments of the present invention, the shielding layer may also be disposed on the third surface 31 or the fourth surface 32 of the inner glass plate 30, or may also be disposed on at least two of the second surface 12, the third surface 31 and the fourth surface 32 at the same time, which is not limited thereto.

[0105] Optionally, the material of the shielding layer can be ceramic ink or ultraviolet ink, and the ceramic ink or ultraviolet ink is formed into the shielding layer by screen printing, inkjet printing and other processes. The color of the shielding layer is preferably black, brown or brown, etc.; the material of the shielding layer can also be a body-colored thermoplastic intermediate layer, and the material of the thermoplastic intermediate layer is polyvinyl butyral (PVB), polyethylene terephthalate (PET), polyvinyl chloride (PVC), thermoplastic polyurethane elastomer (TPU), ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), polyurethane (PU) or ionic polymer film (SGP), etc., preferably PET or PVB, and the color of the thermoplastic intermediate layer is preferably black, brown or brown, etc. The material of the shielding layer can also be a dimming element, which can be a polymer dispersed liquid crystal film (PDLC), a suspended particle film (SPD), an electrochromic film (EC), a dye liquid crystal film (LC), etc. The visible light transmittance of the dimming element can be adjusted between 0% and 20%, between 0.5% and 50%, between 0% and 70%, etc., thereby meeting the visible light transmittance requirements in multiple scenarios.

[0106] It should be noted that, in the embodiment of the present invention, in combination with the shape of the signal transmission area 101 and the power supply voltage of the power supply, the layout of the first extension portion 51 and the second extension portion 61 may have different design schemes.

[0107] For details, please refer to Figures 1 to 3 and Figure 5 In some embodiments of the present invention, the shape of the signal transmission area 101 is substantially trapezoidal, and the signal transmission area 101 includes a top edge and a bottom edge spaced apart along a first direction, the bottom edge is located on a side of the top edge close to the central area of ​​the glass body, and a length a of the top edge along a second direction is less than a length b of the bottom edge along the second direction. The first direction is the width direction of the laminated glass 100 ( Figure 1 The second direction is the length direction of the laminated glass 100 ( Figure 1 The second direction is perpendicular to the first direction. Figure 3 ) is also used to shield the area of ​​the glass body located outside the signal transmission area 101, that is, the non-light-transmitting area 103 surrounds the signal transmission area 101 (see Figure 1 ), the first extension portion 51 and the second extension portion 61 are arranged in parallel and spaced apart at opposite sides of the signal transmission area 101 in the first direction.

[0108] Theoretically, when the length a of the top edge along the second direction, the length b of the bottom edge along the second direction, and the length of the circuit through which the first extension portion 51 and the second extension portion 61 are electrically connected through the transparent heating film 41 (i.e., the distance c between the first extension portion 51 and the second extension portion 61) are equal, that is, a=b=c, the heating area of ​​the transparent heating film 41 corresponding to the signal transmission area 101 can achieve the best heating state. However, in actual applications, the signal transmission area 101 is roughly trapezoidal, the length a of the top edge along the second direction is less than the length b of the bottom edge along the second direction, and considering various factors such as the heat absorption effect of the shielding layer, the heating uniformity of the signal transmission area 101 by the transparent heating film 41 is affected.

[0109] In order to improve the heating uniformity of the transparent heating film 41 on the signal transmission area 101, Figure 2 and Figure 5 In the example, when the power supply voltage of the power supply connected to the first bus bar 50 and the second bus bar 60 is low voltage, the distance c between the first extension portion 51 and the second extension portion 61 is set to be smaller than the length b of the bottom edge along the second direction. Such a design can increase the overall power density of the heating area of ​​the transparent heating film 41 corresponding to the signal transmission area 101 when the power supply voltage is low voltage, so that the signal transmission area 101 can achieve a better heating state.

[0110] Among them, optionally, the power supply voltage of the power supply has a value range of 12V to 16V, and the surface resistance of the transparent heating film 41 is less than 50ops. By limiting the low voltage range of the power supply voltage and the surface resistance of the transparent heating film 41, it can be ensured that the heating area corresponding to the signal transmission area 101 has a better power density, thereby achieving a better heating effect on the signal transmission area 101. It is preferred that the surface resistance of the transparent heating film 41 is less than 30ops to further improve the heating effect of the heating area.

[0111] Optionally, in Figure 2 and Figure 5In the example, the length a of the top edge along the second direction can be smaller than the distance c between the first extension portion 51 and the second extension portion 61, that is, a<c<b, and the length a of the top edge along the second direction can also be larger than the distance c between the first extension portion 51 and the second extension portion 61, that is, c<a<b. It is preferred that the distance c between the first extension portion 51 and the second extension portion 61 is smaller than the length a of the top edge along the second direction. Such a design can make the loop between the first extension portion 51 and the second extension portion 61 as short as possible, which is more conducive to improving the overall power density of the heating zone corresponding to the signal transmission zone 101.

[0112] See also Figure 6 In some other embodiments of the present invention, the first extension portion 51 and the second extension portion 61 are arranged in the same manner as Figure 2 and Figure 5 The configuration is different from that in the example of , in that: the first extension portion 51 and the second extension portion 61 are arranged in parallel and spaced apart on opposite sides of the signal transmission area 101 in the second direction. Figure 6 In the example, when the power supply voltage of the power supply is high voltage, the distance c between the first extension portion 51 and the second extension portion 61 is set to be greater than the length b of the bottom edge along the second direction, that is, a<b<c. ​​In this way, the loop between the first extension portion 51 and the second extension portion 61 can be made longer, which can avoid the problem of local hot spots when the power supply voltage is high voltage, and also help to improve the heating uniformity of the heating zone.

[0113] Among them, optionally, the power supply voltage of the power supply has a value range of 36V to 48V, and the surface resistance of the transparent heating film 41 is greater than 50ops. By limiting the high voltage range of the power supply voltage and the surface resistance of the transparent heating film 41, it is possible to avoid the occurrence of local hot spots in the heating zone corresponding to the signal transmission zone 101, thereby improving the heating uniformity of the heating zone to the signal transmission zone 101. It is preferred that the surface resistance of the transparent heating film 41 is greater than 100ops, which can further improve the heating uniformity of the heating zone.

[0114] See also Figure 7 In some other embodiments of the present invention, the first extension portion 51 and the second extension portion 61 are arranged in the same manner as Figure 2 and Figure 5The setting method in the example is different in that: the shielding layer is also used to shield the area of ​​the glass body adjacent to the top edge, and the area of ​​the glass body adjacent to the signal transmission area on the opposite sides in the second direction, that is, the area of ​​the glass body adjacent to the bottom edge is exposed to the shielding layer. In order to ensure that the appearance of the first busbar 50 and the second busbar 60 is not visible, the first extension part 51 and the second extension part 61 can only be arranged at intervals on the opposite sides of the signal transmission area 101 in the second direction. Figure 7 In the example, in order to improve the overall power density of the heating zone corresponding to the signal transmission zone 101, the distance c1 between the first end of the first extension portion 51 close to the top edge and the first end of the second extension portion 61 close to the top edge is set to be greater than the length a of the top edge along the second direction and less than the length b of the bottom edge along the second direction, and the distance c2 between the second end of the first extension portion 51 close to the bottom edge and the second end of the second extension portion 61 close to the bottom edge is set to be greater than the length b of the bottom edge along the second direction, that is, a<c1<b<c2. With such a design, c1 and c2 can be made as close as possible, that is, the lengths of the two loops at the opposite ends of the first direction in which the first extension portion 51 and the second extension portion 61 are electrically connected through the transparent heating film 41 are as similar as possible, thereby helping to improve the overall power density of the heating zone and ensure that the heating zone has a better heating state.

[0115] Among them, Figure 7 In the example, the supply voltage of the power supply can be low voltage, preferably the supply voltage range is 12V to 16V, and the surface resistance of the transparent heating film 41 is less than 50ops, preferably less than 30ops; the supply voltage of the power supply can also be high voltage, preferably the supply voltage range is 36V to 48V, and the surface resistance of the transparent heating film 41 is greater than 50ops, preferably greater than 100ops.

[0116] Please refer again Figure 7In some other embodiments of the present invention, the first end of the first extension portion 51 is away from the side of the signal transmission area 101 and has a first spacing d1 with the first boundary of the shielding layer in the second direction, and the first boundary is located on the side of the first extension portion 51 away from the signal transmission area 101; the second end of the first extension portion 51 is close to the side of the signal transmission area 101 and has a second spacing d2 with the second boundary of the shielding layer in the second direction, and the second boundary is located between the first extension portion 51 and the signal transmission area 101; the first end of the second extension portion 61 is away from the side of the signal transmission area 101 and has a third spacing d3 with the third boundary of the shielding layer in the second direction, so The third boundary is located on the side of the second extension part 61 away from the signal transmission area 101; the second end of the second extension part 61 is close to the side of the signal transmission area 101 and has a fourth spacing d4 in the second direction with the fourth boundary of the shielding layer, and the fourth boundary is located between the second extension part 61 and the signal transmission area 101; wherein at least one of the first spacing d1, the second spacing d2, the third spacing d3 and the fourth spacing d4 is equal to the preset threshold, and preferably d1, d2, d3 and d4 are all equal to the preset threshold. By limiting the value of at least one spacing, the length difference between c1 and c2 can be reduced, so as to be more conducive to improving the uniformity of the power density of the heating area. wherein the preset threshold is related to the position tolerance of the shielding layer, the first extension part 51 and the second extension part 61. illustratively, the position tolerance of the shielding layer is ±1mm, the position tolerance of the first extension part 51 and the second extension part 61 is ±2mm, and the value range of the preset threshold is set to be greater than or equal to 3mm, preferably 3mm.

[0117] It should be noted that if Figure 2 , Figure 6 and Figure 7As shown, in some embodiments of the present invention, the first busbar 50 further includes a first guide portion 52, one end of which is connected to the first extension portion 51, and the other end of which extends to the side of the laminated glass 100 close to the top edge to connect to the power supply; the second busbar 60 further includes a second guide portion 62, one end of which is connected to the second extension portion 61, and the other end of which extends to the side of the laminated glass 100 close to the top edge to connect to the power supply. That is, the first busbar 50 and the second busbar 60 can be directly connected to the power supply, and different parts of each of the busbars can be integrally formed on the surface of the transparent heating film 41 facing away from the substrate 42, and the manufacturing of the busbars is simple. Among them, the shape of the guide portion of each of the busbars can be cut according to actual needs, and there is no limitation on this.

[0118] Of course, if Figure 5 As shown, in some other embodiments of the present invention, the laminated glass 100 further includes a first lead wire 81 and a second lead wire 82, one end of the first lead wire 81 is connected to the first extension portion 51, and the other end of the first lead wire 81 extends to the side of the laminated glass 100 close to the top edge to connect to the power supply, while one end of the second lead wire 82 is connected to the second extension portion 61, and the other end of the second lead wire 82 extends to the side of the laminated glass 100 close to the top edge to connect to the power supply. That is, the first busbar 50 and the second busbar 60 can also be connected to the power supply through corresponding lead wires, and the shape of each lead wire can also be cut according to actual needs, and there is no limitation on this. Figure 5 In the example, the first extension portion 51 and the second extension portion 61 are respectively arranged on the opposite sides of the signal transmission area 101 in the first direction, which is beneficial to reducing the loop length between the two, thereby improving the heating power of the transparent heating film 41 to the signal transmission area 101; and by connecting a first lead 81 to the power supply at the opposite ends of the first extension portion 51, and connecting a second lead 82 to the power supply in the middle area of ​​the second extension portion 61, so that the first busbar 50 and the second busbar 60 are symmetrically distributed, the heating uniformity of the transparent heating film 41 to the signal transmission area 101 can be improved.

[0119] Preferably, combine Figures 7 to 10In some embodiments of the present invention, when the first extension portion 51 and the second extension portion 61 are spaced apart on opposite sides of the signal transmission area 101 in the second direction, and the first extension portion 51 and the second extension portion 61 are non-parallel, that is, the first extension portion 51 and the second extension portion 61 adopt Figure 7 When arranged in the manner shown, a hollow pattern 90 can be provided on the portion of the transparent heating film 41 (not shown in the figure) adjacent to any side of the signal transmission area 101 in the second direction to improve the uniformity of heating of the signal transmission area 101 by the transparent heating film 41.

[0120] Specifically, Figure 8 As shown, the signal transmission area 101 has a first side (i.e., the left side) and a second side (i.e., the right side) in the second direction, the first side is adjacent to the first extension portion 51, the second side is adjacent to the second extension portion 61, the area between the first side and the first extension portion 51 is defined as a first edge area, and the area between the second side and the second extension portion 61 is defined as a second edge area. Among them, the distance L1 between the first end of the first extension portion 51 (the end close to the top edge of the signal transmission area 101) and the corresponding end of the first side is greater than the distance L2 between the second end of the first extension portion 51 (the end close to the bottom edge of the signal transmission area 101) and the corresponding end of the first side, the transparent heating film 41 covers the first edge area, and the part of the transparent heating film 41 covering the first edge area is provided with the hollow pattern 90, and / or, the distance L3 between the first end of the second extension portion 61 (the end close to the top edge of the signal transmission area 101) and the corresponding end of the second side is greater than the distance L4 between the second end of the second extension portion 61 (the end close to the bottom edge of the signal transmission area 101) and the corresponding end of the second side, the transparent heating film 41 covers the second edge area, and the part of the transparent heating film 41 covering the second edge area is provided with the hollow pattern 90. The hollow pattern 90 includes a plurality of hollow holes, and the plurality of hollow holes are selected from one or a combination of at least two of circular holes, elliptical holes, and polygonal holes, and there is no limitation on this.

[0121] It is understandable that in Figure 8 In the example of FIG. 1 , since the loop length between the first end of the first extension portion 51 and the second extension portion 61 in the first direction is smaller than the loop length between the second end of the first extension portion 51 and the second extension portion 61 in the first direction (i.e. Figure 7C1 is smaller than C2 as shown, so that the power of the portion of the transparent heating film 41 close to the top edge is greater, which will cause the transparent heating film 41 to heat the top area of ​​the signal transmission area 101 higher than the bottom area of ​​the signal transmission area 101. By arranging the hollow pattern 90 on the portion of the transparent heating film 41 covering at least one of the edge areas, not only can the difference in heating temperature rise caused by the difference in loop length between the opposite ends of the first extension portion 51 and the second extension portion 61 in the first direction be compensated, thereby improving the heating uniformity of the transparent heating film 41 on the signal transmission area 101, but also the consumables of the transparent heating film 41 can be reduced, thereby reducing costs.

[0122] Alternatively, if Fig. 9 As shown, in one embodiment, along the second direction, the hollow area of ​​the transparent heating film 41 close to the signal transmission area 101 is smaller than the hollow area of ​​the transparent heating film 41 away from the signal transmission area 101, that is, the closer the hollow pattern 90 is to the signal transmission area 101, the smaller the hollow area is, and conversely, the farther the hollow pattern 90 is from the signal transmission area 101, the larger the hollow area is. Optionally, as Fig.10 As shown, in another embodiment, along the first direction, the hollow area of ​​the transparent heating film 41 close to the top edge is greater than the hollow area of ​​the transparent heating film 41 close to the bottom edge, that is, the closer the hollow pattern 90 is to the bottom edge, the smaller the hollow area, and the closer the hollow pattern 90 is to the top edge, the larger the hollow area. In any of the aforementioned embodiments, the hollow pattern 90 adopts a gradient pattern, which can further improve the heating uniformity of the transparent heating film 41 to the signal transmission area 101.

[0123] See also Fig.11 In some other embodiments of the present invention, the first extension portion 51 and the second extension portion 61 are arranged in parallel and spaced apart on opposite sides of the signal transmission area 101 in the first direction, the first extension portion 51 is located on the side of the bottom edge away from the top edge, the second extension portion 61 is located on the side of the top edge away from the bottom edge, and the length of the second extension portion 61 along the second direction is less than the length of the first extension portion 51 along the second direction, and the second busbar 60 also includes two step portions 63, which are respectively connected to the opposite ends of the second extension portion 61 in the second direction, so as to improve the heating uniformity of the transparent heating film 41 on the signal transmission area 101.

[0124] Specifically, Fig.11As shown, each of the step portions 63 includes a plurality of step sections, each of the step sections is in a U-shaped structure and the extension length along the second direction is less than 1 / 2 of the length of the second extension portion 61 along the second direction, the open end of each of the step sections faces away from the signal transmission area 101, and the plurality of step sections are spaced apart along the first direction between the first extension portion 51 and the second extension portion 61 and are connected end to end in sequence, and the open ends of the plurality of step sections are flush or nearly flush, so that the step portion 63 is in a bow-shaped structure as a whole; wherein, along the direction in which the second extension portion 61 approaches the first extension portion 51, the lengths of the plurality of step sections along the second direction decrease successively.

[0125] It is understandable that in Fig.11 In the example, because the length of the second extension portion 61 along the second direction is less than the length of the first extension portion 51 along the second direction, the loop length between the end of the first extension portion 51 and the end of the second extension portion 61 will be greater than the loop length between the middle of the first extension portion 51 and the middle of the second extension portion 61, thereby making the heating power of the portion of the transparent heating film 41 covering the middle area of ​​the signal transmission area 101 greater than the heating power of the portion of the transparent heating film 41 covering the two end areas of the signal transmission area 101 in the second direction, resulting in the transparent heating film 41 heating the middle area of ​​the signal transmission area 101 The temperature rise is higher than the heating temperature rise of the two end areas of the signal transmission area 101, and by connecting the stepped portion 63 to the opposite ends of the second extension portion 61, and the stepped portion The lengths of the multiple step sections of 63 along the second direction are set to decrease in sequence, so that although the loop length between the first extension portion 51 and the multiple step sections decreases in sequence, the difference between the loop length between any of the step sections and the first extension portion 51 and the loop length between the middle of the first extension portion 51 and the middle of the second extension portion 61 is smaller than the difference between the loop length between the end of the first extension portion 51 and the end of the second extension portion 61 and the loop length between the middle of the first extension portion 51 and the middle of the second extension portion 61, which is equivalent to optimizing the loop length between any of the step sections and the first extension portion 51 to be close to the loop length between the middle of the first extension portion 51 and the middle of the second extension portion 61, which is beneficial to improving the heating uniformity of the transparent heating film 41 on the signal transmission area 101. Preferably, in Fig.11 In the example, the two stepped portions 63 are distributed about the perpendicular midline of the second extending portion 61 , which helps to further improve the heating uniformity of the signal transmission area 101 by the transparent heating film 41 .

[0126] Of course, in other embodiments of the present invention, each of the step portions 63 may also include only one step section, which is not limited to this.

[0127] It should also be noted that, in the embodiment of the present invention, in order to reduce the manufacturing cost of the first heating layer 40, the orthographic projection of the transparent heating film 41 on the glass body preferably only covers the signal transmission area 101, that is, the transparent heating film 41 is only used to heat the signal transmission area 101 and its surrounding areas. In order to achieve heating of other areas of the laminated glass 100 except the signal transmission area 101, the laminated glass 100 also includes a second heating layer arranged between the outer glass plate 10 and the inner glass plate 30, the second heating layer is made of a transparent heating film or an electric heating wire, and the second heating layer can adopt the heating layer in the existing laminated glass, which will not be described in detail.

[0128] Table 1 below is a test comparison result of Comparative Examples 1-3 and Examples 1-5, wherein Comparative Examples 1-3 use laminated glass using existing metal conductive heating film, and Examples 1-5 use laminated glass using transparent heating film made of carbon nanotube material.

[0129] Table 1: Comparative results of experiments with Comparative Examples 1-3 and Examples 1-5

[0130]

[0131] It can be seen from Table 1 that, compared with Examples 1-3, under the premise of substantially the same power density, although the sheet resistance of the laminated glass in the Examples is higher than that in the Comparative Examples, the transmittance of the laminated glass in the Examples is higher and the signal shielding is less. That is to say, the laminated glass 100 provided in the embodiments of the present invention can not only heat the signal transmission area 101 through the transparent heating film 41, but also has a transparent appearance and cannot be seen, and can also reduce or even avoid the influence on the sensor signal, which is conducive to ensuring that the sensor can work normally.

[0132] See also Fig.12 The embodiment of the present invention further provides a method for manufacturing a laminated glass 100, the method comprising steps S1 to S4. Figure 3 ,right Fig.12 The various steps of the production method shown are described.

[0133] Step S1, providing an adhesive layer 20, and opening a receiving groove on a preset area of ​​the adhesive layer 20;

[0134] Step S2, providing a substrate 42, and depositing a transparent heating film 41 made of carbon nanotubes on one of the surfaces of the substrate 42, wherein the substrate 42 and the transparent heating film 41 constitute a first heating layer 40; wherein the transparent heating film 41 can be deposited on one of the surfaces of the substrate 42 by chemical vapor deposition (CVD) or physical vapor deposition (PVD), preferably directly deposited on the surface of the substrate 42 by floating catalyst chemical vapor deposition (FCCVD).

[0135] Step S3, the first heating layer 40 is fixedly disposed in the receiving groove of the adhesive layer 20, and the transparent heating film 41 at least covers the signal transmission area 101;

[0136] Step S4 , providing an outer glass plate 10 and an inner glass plate 30 , laminating the outer glass plate 10 and the inner glass plate 30 on opposite sides of the adhesive layer 20 , respectively, and then performing a lamination process to obtain a laminated glass 100 .

[0137] In the laminated glass 100 manufactured by the manufacturing method provided by the embodiment of the present invention, the transparent heating film 41 used for heating the signal transmission area 101 is made of carbon nanotube material. Since the carbon nanotube material has excellent mechanical properties, electrical conductivity, heat transfer properties and optical properties, the transparent heating film 41 can not only heat the signal transmission area 101, but also make the appearance of the transparent heating film 41 transparent and invisible, thereby improving the aesthetics of the laminated glass 100, and can reduce or even avoid the influence on the signal transmittance of the sensor, which is beneficial to improving the working effect of the sensor.

[0138] It is not difficult to understand that the laminated glass 100 may have other structures and features of the laminated glass 100 in any of the above embodiments. For more details, please refer to the above related content description, which will not be repeated here.

[0139] Furthermore, an embodiment of the present invention also provides a vehicle, including a vehicle frame and a laminated glass 100, wherein the vehicle frame is used to carry the laminated glass 100, so that the laminated glass 100 can be used as the front windshield, rear windshield or side window glass of the vehicle. The vehicle frame refers to a frame used to support and connect various assemblies of the vehicle, so that each assembly maintains a relatively correct position and bears various loads inside and outside the vehicle; the laminated glass 100 can be the laminated glass 100 described in any of the aforementioned embodiments, and therefore at least has all the beneficial effects brought by the technical solutions of the aforementioned embodiments. For more specific descriptions, reference can be made to the relevant contents of the aforementioned embodiments, which will not be repeated here.

[0140] It can be understood that in the embodiments of the present invention, the vehicle can be but is not limited to a sedan, a multi-purpose vehicle, a sports utility vehicle, an off-road vehicle, a pickup truck, a van, a passenger car, a truck, etc.

[0141] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0142] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0143] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A laminated glass, characterized in that: The laminated glass comprises: A glass body, comprising an outer glass plate, an adhesive layer and an inner glass plate which are stacked, wherein the adhesive layer bonds the outer glass plate and the inner glass plate together, and the glass body has a signal transmission area for a sensor signal to transmit; A first heating layer is arranged between the outer glass plate and the inner glass plate, and the first heating layer includes a transparent heating film made of a carbon nanotube material. Along the thickness direction of the glass body, the orthographic projection of the transparent heating film on the glass body at least covers the signal transmission area, and the transparent heating film is used to generate heat when power is turned on.

2. The laminated glass according to claim 1, characterized in that: The laminated glass further comprises a first busbar, a second busbar and a shielding layer; the first busbar and the second busbar are arranged between the outer glass plate and the inner glass plate; the shielding layer is arranged on a surface of the outer glass plate facing the inner glass plate and / or at least one surface of the inner glass plate in a thickness direction, and shields at least the first busbar and the second busbar; Among them, the first busbar includes a first extension portion, the second busbar includes a second extension portion, the first extension portion and the second extension portion are spaced apart at opposite sides of the signal transmission area in a preset direction and are electrically connected to the transparent heating film respectively; when the first busbar and the second busbar are connected to the power supply, the transparent heating film is energized to generate heat.

3. The laminated glass according to claim 2, characterized in that: The signal transmission area includes a top edge and a bottom edge spaced apart along a first direction, the bottom edge is located on a side of the top edge close to the central area of ​​the glass body, a length a of the top edge along a second direction is less than a length b of the bottom edge along the second direction, and the second direction is perpendicular to the first direction; The shielding layer is also used to shield the area of ​​the glass body located at the periphery of the signal transmission area, and the first extension portion and the second extension portion are arranged in parallel and spaced apart at opposite sides of the signal transmission area in the first direction; The power supply voltage of the power supply is low voltage, and the distance c between the first extension portion and the second extension portion is smaller than the length b of the bottom edge along the second direction.

4. The laminated glass according to claim 3, characterized in that: A distance c between the first extension portion and the second extension portion is smaller than a length a of the top edge along the second direction.

5. The laminated glass according to claim 2, characterized in that: The signal transmission area includes a top edge and a bottom edge spaced apart along a first direction, the bottom edge is located on a side of the top edge close to the central area of ​​the glass body, a length a of the top edge along a second direction is less than a length b of the bottom edge along the second direction, and the second direction is perpendicular to the first direction; The shielding layer is also used to shield the area of ​​the glass body located at the periphery of the signal transmission area, and the first extension portion and the second extension portion are arranged in parallel and spaced apart at opposite sides of the signal transmission area in the second direction; The power supply voltage of the power supply is high voltage, and the distance c between the first extension portion and the second extension portion is greater than the length b of the bottom edge along the second direction.

6. The laminated glass according to claim 2, characterized in that: The signal transmission area includes a top edge and a bottom edge spaced apart along a first direction, the bottom edge is located on a side of the top edge close to the central area of ​​the glass body, a length a of the top edge along a second direction is less than a length b of the bottom edge along the second direction, and the second direction is perpendicular to the first direction; The shielding layer is further used to shield the area of ​​the glass body adjacent to the top edge and the area of ​​the glass body adjacent to the opposite sides of the signal transmission area in the second direction, and the first extension portion and the second extension portion are arranged at intervals on the opposite sides of the signal transmission area in the second direction; Among them, the distance c1 between the first end of the first extension portion close to the top edge and the first end of the second extension portion close to the top edge is greater than the length a of the top edge along the second direction and less than the length b of the bottom edge along the second direction, and the distance c2 between the second end of the first extension portion close to the bottom edge and the second end of the second extension portion close to the bottom edge is greater than the length b of the bottom edge along the second direction.

7. The laminated glass according to claim 3, 4 or 6, characterized in that: The power supply voltage of the power supply is in the range of 12V to 16V, and the surface resistance of the transparent heating film is less than 50ops.

8. The laminated glass according to claim 7, characterized in that: The surface resistance of the transparent heating film is less than 30 ops.

9. The laminated glass according to claim 5 or 6, characterized in that: The power supply voltage of the power supply is in the range of 36V to 48V, and the surface resistance of the transparent heating film is greater than 50ops.

10. The laminated glass according to claim 9, characterized in that: The surface resistance of the transparent heating film is greater than 100 ops.

11. The laminated glass according to claim 6, characterized in that: A first end of the first extension portion is away from a side of the signal transmission area and has a first distance d1 from a first boundary of the shielding layer in the second direction, and the first boundary is located on a side of the first extension portion away from the signal transmission area; A second end of the first extension portion close to the side of the signal transmission area and a second boundary of the shielding layer have a second distance d2 in the second direction, and the second boundary is located between the first extension portion and the signal transmission area; A third distance d3 is formed between the first end of the second extension portion away from the side of the signal transmission area and the third boundary of the shielding layer in the second direction, and the third boundary is located on the side of the second extension portion away from the signal transmission area; A fourth distance d4 is formed between the second end of the second extension portion close to the side of the signal transmission area and the fourth boundary of the shielding layer in the second direction, and the fourth boundary is located between the second extension portion and the signal transmission area; Wherein, at least one of the first interval d1, the second interval d2, the third interval d3, and the fourth interval d4 is equal to a preset threshold.

12. The laminated glass according to claim 11, characterized in that: The value range of the preset threshold is greater than or equal to 3 mm.

13. The laminated glass according to claim 6, 11 or 12, characterized in that: The signal transmission area has a first side and a second side in the second direction, the first side is adjacent to the first extension portion, the second side is adjacent to the second extension portion, the area between the first side and the first extension portion is defined as a first edge area, and the area between the second side and the second extension portion is defined as a second edge area; A distance L1 between the first end of the first extension portion and a corresponding end of the first side edge is greater than a distance L2 between the second end of the first extension portion and a corresponding end of the first side edge, the transparent heating film covers the first edge area, and a portion of the transparent heating film covering the first edge area is provided with a hollow pattern, and / or a distance L3 between the first end of the second extension portion and a corresponding end of the second side edge is greater than a distance L4 between the second end of the second extension portion and a corresponding end of the second side edge, the transparent heating film covers the second edge area, and a portion of the transparent heating film covering the second edge area is provided with a hollow pattern; Wherein, the hollow pattern includes a plurality of hollow holes, and the plurality of hollow holes are selected from one of circular holes, elliptical holes, polygonal holes, or a combination of at least two of them.

14. The laminated glass according to claim 13, characterized in that: Along the second direction, the hollow area of ​​the portion of the transparent heating film close to the signal transmission area is smaller than the hollow area of ​​the portion of the transparent heating film far from the signal transmission area; Alternatively, along the first direction, a hollow area of ​​a portion of the transparent heating film close to the top edge is larger than a hollow area of ​​a portion of the transparent heating film close to the bottom edge.

15. The laminated glass according to claim 3 or 4, characterized in that: The first extension portion is located at a side of the bottom edge away from the top edge, the second extension portion is located at a side of the top edge away from the bottom edge, and a length of the second extension portion along the second direction is less than a length of the first extension portion along the second direction; The second busbar further includes two step portions, and the two step portions are respectively connected to opposite ends of the second extension portion in the second direction; Wherein, each of the step portions includes one or more step sections, each of the step sections is in a U-shaped structure and the extension length along the second direction is less than 1 / 2 of the length of the second extension portion along the second direction, the open end of each of the step sections faces away from the signal transmission area, the multiple step sections are distributed between the first extension portion and the second extension portion at intervals along the first direction and are connected end to end in sequence, and the open ends of the multiple step sections are flush or nearly flush; along the direction of the second extension portion approaching the first extension portion, the lengths of the multiple step sections along the second direction decrease successively.

16. The laminated glass according to claim 1, wherein: The first heating layer further comprises a substrate, and the transparent heating film is fixedly arranged on the surface of the substrate facing the outer glass plate, or the transparent heating film is fixedly arranged on the surface of the substrate facing the inner glass plate.

17. The laminated glass according to claim 16, characterized in that: The transparent heating film is directly deposited on the surface of the substrate by chemical vapor deposition or physical vapor deposition.

18. The laminated glass according to claim 17, characterized in that: The transparent heating film is directly deposited on the surface of the substrate by a floating catalyst chemical vapor deposition method.

19. The laminated glass according to claim 16, wherein: The first heating layer further comprises a protective film made of a polymer material, wherein the protective film covers the surface of the transparent heating film facing away from the substrate.

20. The laminated glass according to claim 16, wherein: The material of the substrate is selected from at least one of PET, PVB, PC and modified CPI, and / or the thickness of the substrate is 10 μm to 500 μm.

21. The laminated glass according to any one of claims 16 to 20, characterized in that: The adhesive layer is provided with a receiving groove, the orthographic projection of the receiving groove on the glass body at least covers the signal transmission area, and the first heating layer is fixedly arranged in the receiving groove.

22. The laminated glass according to claim 21, characterized in that: The adhesive layer includes a first sub-adhesive layer and a second sub-adhesive layer stacked on each other, the first sub-adhesive layer includes a first adhesive surface and a second adhesive surface opposite to each other, the second sub-adhesive layer includes a third adhesive surface and a fourth adhesive surface opposite to each other, the second adhesive surface is laminated to the third adhesive surface, the outer glass plate is laminated to the first adhesive surface, and the inner glass plate is laminated to the fourth adhesive surface; The first sub-adhesive layer has the receiving groove formed from the second adhesive surface, or the second sub-adhesive layer has the receiving groove formed from the third adhesive surface; or the first sub-adhesive layer has the first sub-receiving groove formed from the second adhesive surface, and the second sub-receiving groove formed from the third adhesive surface, and the second sub-receiving groove is opposite to the first sub-receiving groove and together constitutes the receiving groove.

23. The laminated glass according to claim 21, characterized in that: The adhesive layer is a single layer, and includes a first adhesive surface and a second adhesive surface opposite to each other, the outer glass plate is bonded to the first adhesive surface, and the inner glass plate is bonded to the second adhesive surface; Wherein, the adhesive layer is provided with the accommodating groove from the first adhesive surface or the second adhesive surface.

24. The laminated glass according to claim 22 or 23, characterized in that: The laminated glass further comprises an optical adhesive layer, and the optical adhesive layer bonds the bottom of the accommodating groove and the surface of the first heating layer facing the bottom of the groove together.

25. The laminated glass according to claim 1, characterized in that: The signal transmitted by the signal transmission area is an optical camera signal or a laser radar signal in the 905nm band, and the material of the adhesive layer is PVB; Alternatively, the signal transmitted by the signal transmission area is a laser radar signal in the 1550nm band, and the material of the adhesive layer is EVA.

26. A method for manufacturing laminated glass, characterized in that: The production method comprises: Providing an adhesive layer, and opening a receiving groove in a preset area of ​​the adhesive layer; Providing a substrate, and depositing a transparent heating film made of carbon nanotubes on one surface of the substrate, wherein the substrate and the transparent heating film constitute a first heating layer; The first heating layer is fixedly disposed in the receiving groove of the adhesive layer, and the transparent heating film at least covers the signal transmission area; An outer glass plate and an inner glass plate are provided, and the outer glass plate and the inner glass plate are respectively laminated on opposite sides of the adhesive layer, and then laminated to obtain a laminated glass.

27. The method for manufacturing laminated glass according to claim 26, characterized in that: The transparent heating film is directly deposited on the surface of the substrate by a floating catalyst chemical vapor deposition method.

28. A vehicle, characterized in that: The vehicle comprises a vehicle frame and the laminated glass according to any one of claims 1 to 25, wherein the vehicle frame is used to carry the laminated glass; Wherein, the vehicle further comprises a sensor located inside the vehicle, and the sensor is arranged opposite to the signal transmission area.

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