Electrically heated glass

Abstract

The application provides an electric heating glass, which comprises an outer glass plate, an intermediate layer and an inner glass plate which are arranged in a stack, the outer glass plate and the inner glass plate are fixedly connected through the intermediate layer; a conductive film is arranged on one side of the outer glass plate close to the intermediate layer, or the conductive film is arranged on one side of the inner glass plate close to the intermediate layer, and at least one film area for signal transmission is arranged in the conductive film; a first bus, a second bus and a third bus are arranged at intervals, the first bus, the second bus and the third bus are electrically connected with the conductive film, and the third bus has a marked shape. The technical scheme of the application can avoid the hot spot concentration of the conductive film and the local temperature rise of the glass to affect the transmission of the photoelectric signal. The marked shape of the third bus can make the electric heating glass have excellent appearance aesthetic effect as a whole.

Description

Technical Field

[0001] This application relates to the field of glass, and more particularly to an electrically heated glass. Background Technology

[0002] In cold weather, frost easily forms on the surface of automotive or architectural glass, or fogging can easily occur in environments with significant temperature differences between the inside and outside, affecting the clarity of the glass. This is especially true for vehicle windshields; frost or fogging can severely impair the driver's vision, greatly increasing the risk of traffic accidents. Therefore, incorporating electric heating elements on or inside the glass surface to heat it and achieve defrosting or defogging has become a technological trend in glass products. For glass using conductive films as electric heating elements, while the conductive film effectively conducts heat, it can also interfere with signals transmitted by devices such as cameras or sensors. Therefore, on glass where cameras or sensors are installed, corresponding decoction areas are typically created on the conductive film to ensure normal signal transmission.

[0003] However, due to the uneven current density around the film removal area during the heating process, hot spots tend to concentrate around the film removal area. Summary of the Invention

[0004] The embodiments of this application provide an electrically heated glass that can prevent hot spots from concentrating on the conductive film and avoid local temperature rise in the glass from affecting the transmission of photoelectric signals.

[0005] In a first aspect, this application provides an electrically heated glass, comprising:

[0006] An outer glass plate, a middle layer, and an inner glass plate are stacked together, with the outer glass plate and the inner glass plate fixedly connected by the middle layer;

[0007] A conductive film is disposed on the outer glass plate near the intermediate layer, or the conductive film is disposed on the inner glass plate near the intermediate layer, and at least one film removal area for signal transmission is provided in the conductive film.

[0008] A first busbar, a second busbar, and a third busbar are provided at intervals. The first busbar, the second busbar, and the third busbar are all in electrical contact with the conductive film. The third busbar has a distinctive shape.

[0009] The conductor, the third busbar is electrically connected to the first busbar through the conductor, and the conductor and the third busbar are arranged along the edge of the film removal area to form a ring around the film removal area.

[0010] Understandably, in existing technologies, when current flows through the edge of the stripping region, since there is no conductive film in the stripping region, the current can only flow along the edge, leading to excessively high edge temperatures and affecting the optical performance of the stripping region. In this application, the first and second conductors can connect the first busbar and the third busbar. This forms an additional loop (first busbar - conductor - third busbar - second busbar), reducing current convergence at the edge of the stripping region and consequently reducing heat accumulation at the edge. Furthermore, the third busbar has a distinctive shape, ensuring excellent overall aesthetics of the electrically heated glass even when exposed.

[0011] In one possible implementation, a shielding layer is further included, which is disposed on the side of the outer glass plate near the intermediate layer and / or on the side of the inner glass plate near the intermediate layer. The shielding layer is disposed along the edge of the electrically heated glass and is used to shield the first busbar, the second busbar, and at least a portion of the conductor. The film removal area and the third busbar are not shielded by the shielding layer.

[0012] In one possible implementation, the shielding layer is disposed around the edge of the film removal area and has an opening, so that the shielding layer does not completely close off the film removal area, and the third busbar is located at the opening.

[0013] In one possible implementation, the conductor includes a first conductor and a second conductor, which are disposed on opposite sides of the film removal zone. The third busbar includes a first portion and a second portion, which are spaced apart. One end of the first conductor is connected to the first busbar and extends along one side of the film removal zone. The other end of the first conductor is connected to the first portion. One end of the second conductor is connected to the first busbar and extends along the other side of the film removal zone. The other end of the second conductor is connected to the second portion.

[0014] In one possible implementation, the film removal area includes a first edge and a second edge disposed opposite to each other, and a third edge and a fourth edge disposed opposite to each other, the third edge and the fourth edge being connected between the first edge and the second edge, the first conductor extending along the first edge and the third edge, and the second conductor extending along the second edge and the third edge.

[0015] In one possible implementation, the film removal area includes a first edge and a second edge disposed opposite to each other, and a third edge and a fourth edge disposed opposite to each other, the third edge and the fourth edge being connected between the first edge and the second edge, the first conductor extending sequentially along the first edge, the third edge and the second edge, and the second conductor extending along the second edge.

[0016] In one possible implementation, the film removal area includes a first edge and a second edge disposed opposite to each other, and a third edge and a fourth edge disposed opposite to each other. The third edge and the fourth edge are connected between the first edge and the second edge. The first busbar intersects with the first edge and the second edge. The first conductor is connected at the intersection of the first busbar and the first edge, and the second conductor is connected at the intersection of the first busbar and the second edge.

[0017] In one possible implementation, the conductive film is a metal film or a transparent conductive oxide film.

[0018] In one possible implementation, the distinctive shape of the third busbar is a pattern shape and / or a text shape.

[0019] In one possible implementation, the pattern shape and / or text shape of the third busbar includes straight stripes and / or curved stripes, the width of which is between 6mm and 12mm.

[0020] In one possible implementation, the pattern shape of the third busbar includes curved stripes with a radius of curvature of 2mm-1000mm.

[0021] In one possible implementation, the pattern shape of the third busbar includes multiple identical or different pattern units, which overlap or contact each other to form the pattern shape of the third busbar.

[0022] Understandably, the overlapping arrangement of multiple pattern units allows the third busbar to form a unified whole. After the conductor is connected to the third busbar, the third busbar can effectively transfer the current or heat from the conductor to the conductive film, thereby reducing the temperature at the edges of the conductor and the conductive film and solving the problem of heat accumulation at the edges of the conductive film. The overlapping arrangement of multiple closed patterns can make the shape of the third busbar regular, making its appearance more regular and thus improving the appearance of the electrically heated glass.

[0023] In one possible implementation, the text shape of the third busbar includes multiple identical or different text units, and there is at least one connection point between the multiple text units to connect the multiple text units to form the text shape of the third busbar.

[0024] In one possible implementation, the distance between the third busbar and the film removal zone is 2mm-100mm.

[0025] In one possible implementation, the electrically heated glass is curved glass, and the vertical radius of curvature of the electrically heated glass from the bottom edge to the top edge is 4000mm-20000mm. Attached Figure Description

[0026] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the vehicle structure provided in the embodiments of this application;

[0028] Figure 2 yes Figure 1 The diagram shows a structural schematic of an electrically heated glass.

[0029] Figure 3 yes Figure 1 A cross-sectional schematic diagram of a portion of the structure of the electrically heated glass;

[0030] Figure 4 yes Figure 1 A schematic diagram of another structure of electrically heated glass is shown;

[0031] Figure 5 yes Figure 1 A schematic diagram of another structure of the electrically heated glass shown;

[0032] Figure 6 yes Figure 1 A schematic diagram of another structure of electrically heated glass is shown;

[0033] Figure 7 This is a schematic diagram of the structure of a third busbar provided in an embodiment of this application;

[0034] Figure 8 This is a schematic diagram of another third busbar structure provided in an embodiment of this application;

[0035] Figure 9 This is a schematic diagram of another third busbar provided in the embodiments of this application. Detailed Implementation

[0036] For ease of understanding, the terminology used in the embodiments of this application will be explained first.

[0037] And / or: This is simply a way of describing the relationship between related objects. It indicates that there can be three kinds of relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0038] Multiple: refers to two or more.

[0039] Connection: should be interpreted broadly. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through an intermediary.

[0040] The specific embodiments of this application will now be clearly described in conjunction with the accompanying drawings.

[0041] In cold weather, frost easily forms on the surface of automotive or architectural glass, or fogging can easily occur in environments with significant temperature differences between the inside and outside, affecting the clarity of the glass. This is especially true for vehicle windshields; frost or fogging can severely impair the driver's vision, greatly increasing the risk of traffic accidents. Therefore, incorporating electric heating elements on or inside the glass surface to heat it and achieve defrosting or defogging has become a technological trend in glass products. For glass using conductive films as electric heating elements, while the conductive film effectively conducts heat, it can also interfere with signals transmitted by devices such as cameras or sensors. Therefore, on glass where cameras or sensors are installed, corresponding decoction areas are typically created on the conductive film to ensure normal signal transmission.

[0042] However, due to the uneven current density around the film removal area during the heating process, hot spots tend to concentrate around the film removal area.

[0043] Based on this, embodiments of this application provide an electrically heated glass that can prevent hot spots from concentrating on the conductive film and avoid local temperature rise in the glass from affecting the transmission of photoelectric signals.

[0044] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of this application. The vehicle 1000 includes an electrically heated glass 100 and a vehicle body 200. The electrically heated glass 100 can be connected to the vehicle body 200. The electrically heated glass 100 can be the windshield of the vehicle 1000.

[0045] It should be noted that, Figure 1The purpose of this illustration is solely to depict the connection relationship between the vehicle body 200 and the electrically heated glass 100, and is not to specifically limit the connection positions, specific structures, or quantities of the various devices. Furthermore, the structures illustrated in this application's embodiments do not constitute a specific limitation on the vehicle 1000. In other embodiments of this application, the vehicle 1000 may include more or fewer components than illustrated, or combine certain components, or split certain components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of both.

[0046] The vehicle body 200 includes an optoelectronic component 210. The optoelectronic component 210 is disposed on the side of the electrically heated glass 100 facing the interior of the vehicle, and is used to transmit or receive optoelectronic signals 211. For example, the optoelectronic component 210 may be a lidar and / or a near-infrared camera. The lidar can be used for positioning the vehicle 1000 itself and for ranging the external environment or the vehicle 1000 itself. The near-infrared camera can capture images of the external environment of the vehicle 1000.

[0047] Please see Figure 2 , Figure 2 yes Figure 1 The diagram shows a structural schematic of an electrically heated glass 100. The first direction is the width direction of the electrically heated glass 100, indicated by X in the diagram. The second direction is the length direction of the electrically heated glass 100, indicated by Y in the diagram.

[0048] The electrically heated glass 100 includes a film removal area 101 and a coating area 102. The film removal area 101 is used to allow the photoelectric signal 211 of the photoelectric component 210 to pass through. The film removal area 101 can be located at the middle position on the side of the electrically heated glass 100 near the top of the vehicle 1000. The film removal area 101 can be disposed along the edge of the electrically heated glass 100. The shape of the film removal area 101 can be rectangular, trapezoidal, or triangular-like. The shape of the film removal area 101 is determined according to the signal transmission and reception range of the photoelectric signal 211 of the photoelectric component 210. This application does not impose specific limitations on the shape of the film removal area 101. The film removal area 101 can include a first edge 1011 and a second edge 1012 disposed opposite to each other along a first direction, and a third edge 1013 and a fourth edge 1014 disposed opposite to each other along a second direction. The third edge 1013 can also be a part of the edge of the electrically heated glass 100. Except for the film removal area 101, the electrically heated glass 100 is entirely within the area of ​​the coating area 102. It should be noted that the film removal area 101 can also be a certain distance from the edge of the electrically heated glass 100. The coating area 102 can be arranged around the film removal area 101.

[0049] Please refer to the following: Figure 2 and Figure 3 , Figure 3 yes Figure 1This is a cross-sectional schematic diagram of a portion of the structure of an electrically heated glass 100. The electrically heated glass 100 also includes a laminated glass 110, a conductive film 120, a first busbar 130, a second busbar 140, a third busbar 150, and a conductor 160. Of the first busbar 130 and the second busbar 140, one is a positive busbar and the other is a negative busbar. The first busbar 130 and the second busbar 140 can be symmetrically arranged on opposite sides of the electrically heated glass 100, such as the first busbar 130 being arranged on the upper side of the electrically heated glass 100 and the second busbar 140 being arranged on the lower side of the electrically heated glass 100. Furthermore, in some embodiments, the first busbar 130 and the second busbar 140 can also be arranged on the left and right sides of the electrically heated glass 100, respectively.

[0050] It is understood that an external power supply (not shown) can allow heating current to flow through the conductive film 120 via the first bus 130 and the second bus 140. The conductive film 120 heats up under the influence of the current, thus enabling the electrically heated glass 100 to perform functions such as defrosting, defogging, and de-icing. For example, the first bus 130 can be connected to the positive terminal of the external power supply (not shown), and the second bus 140 can be connected to the negative terminal of the external power supply. Alternatively, the first bus 130 can be connected to the negative terminal of the external power supply, and the second bus 140 can be connected to the positive terminal of the external power supply.

[0051] The laminated glass 110 includes an outer surface (not shown) and an inner surface (not shown) disposed opposite to each other. The outer surface is the side of the laminated glass 110 facing outwards after the electrically heated glass 100 is connected to the vehicle body 200, and the inner surface is the side of the laminated glass 110 facing inwards after it is connected to the vehicle body 200. The laminated glass 110 includes an outer glass panel 111, an inner glass panel 113, and an intermediate layer 112 disposed between the outer glass panel 111 and the inner glass panel 113. The outer glass panel 111 includes a first surface 1111 and a second surface 1112 disposed opposite to each other. The first surface 1111 is away from the intermediate layer 112, and the second surface 1112 is connected to the intermediate layer 112. The first surface 1111 is also the outer surface of the laminated glass 110. The inner glass panel 113 includes a third surface 1131 and a fourth surface 1132 disposed opposite to each other. The third surface is connected to the intermediate layer 112, and the fourth surface 1132 is also the inner surface of the laminated glass 110. The visible light transmittance of the electrically heated glass 100 can be greater than or equal to 70%, which meets the regulatory requirements for the windshield of vehicle 1000.

[0052] The thickness of the outer glass plate 111 can be between 1.6mm and 5.0mm (inclusive of the endpoint values ​​of 1.6mm and 5.0mm). For example, the thickness of the outer glass plate 111 can be 1.6mm, 1.8mm, 2.1mm, 2.6mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, or 5.0mm, etc. The outer glass plate 111 can be bent and formed at a temperature of at least 500°C. The thickness of the inner glass plate 113 can be between 0.7mm and 5.0mm (inclusive of the endpoint values ​​of 0.7mm and 5.0mm), for example, the thickness of the inner glass plate 113 can be 0.7mm, 1.1mm, 1.6mm, 1.8mm, 2.1mm, 2.6mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc. The inner glass plate 113 can also be bent and formed at a temperature of at least 500°C.

[0053] It should be noted that the electrically heated glass 100 used as a windshield is typically curved, but its shape is not limited to the shape described above. It can be any shape that meets the requirements of the glass's usage scenario. For example, the electrically heated glass 100 can also be a flat plate. The embodiments of this application do not impose strict requirements on the shape of the electrically heated glass 100. For example, the electrically heated glass 100 has a vertical radius of curvature from the bottom edge to the top edge. To facilitate the design and production of the electrically heated glass 100, the vertical radius of curvature can be 4000mm-20000mm.

[0054] The intermediate layer 112 connects the outer glass panel 111 and the inner glass panel 113, giving the electrically heated glass 100 a sandwich structure, thereby improving the safety of the electrically heated glass 100 and ensuring it meets the safety standards and regulatory requirements for vehicle window glass. The intermediate layer 112 can be selected from one or more of the following: polycarbonate (PC), polyvinyl chloride (PVC), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR), and ionomer polymer film (SGP). For example, the intermediate layer 112 can be a single-layer or multi-layer structure; multi-layer structures include, for example, double-layer, triple-layer, quadruple-layer, and five-layer structures. The intermediate layer 112 can also have other functions, such as providing at least one tinted area as a shaded zone to reduce sunlight interference with the eyes, adding infrared absorbers for sun protection or heat insulation, adding ultraviolet absorbers for ultraviolet protection, or having at least one layer of the multi-layer structure with a higher plasticizer content for sound insulation. In order to eliminate image ghosting in head-up displays, traditional electrically heated glass 100 typically uses a wedge-shaped intermediate layer with a wedge angle of at least 0.3 mrad, which makes it difficult to design, produce, and debug the imaging effect of the projection component. The electrically heated glass 100 provided in this application can be directly replaced by an ordinary intermediate layer of equal thickness. It is understood that this application may also use a wedge-shaped intermediate layer with a smaller wedge angle, such as a wedge angle of 0.01 to 0.15 mrad, for example 0.01 mrad, 0.02 mrad, 0.03 mrad, 0.04 mrad, 0.05 mrad, 0.06 mrad, 0.07 mrad, 0.08 mrad, 0.09 mrad, 0.10 mrad, 0.11 mrad, 0.12 mrad, 0.13 mrad, 0.14 mrad, 0.15 mrad, etc. This can further eliminate the perspective ghosting of objects in the external environment of the vehicle 1000 through the electrically heated glass 100. The wedge-shaped intermediate layer 112 with a smaller wedge angle can be obtained by a simple stretching process, thereby eliminating reflection ghosting and perspective ghosting at the same time in a low-cost manner, and obtaining higher quality projection images and viewing effects. The intermediate layer 112 can be a transparent intermediate layer or a colored intermediate layer, and its visible light transmittance can be greater than or equal to 80%, preferably greater than or equal to 85%, and more preferably greater than or equal to 90%. The thickness of the intermediate layer can be 0.38mm-1.6mm, such as 0.38mm, 0.5mm, 0.76mm, 1.14mm, 1.52mm, 1.6mm, etc.

[0055] Please refer to the following: Figure 2The electrically heated glass 100 also includes a shielding layer 170. The shielding layer 170 is located within the coating area 102. The shielding layer 170 may be disposed along the first edge 1011 and the second edge 1012 of the coating removal area 101. The shielding layer 170 may also be disposed along the third edge 1013 of the coating removal area 101. It should be noted that the shielding layer 170 is not disposed on the side of the fourth edge 1014 of the coating removal area 101 facing the coating area 102. That is, the shielding layer 170 has an opening at the fourth edge 1014. The shielding layer 170 is disposed on the side of the outer glass plate 111 near the intermediate layer 112 and / or on the side of the inner glass plate 113 near the intermediate layer 112. It should be noted that the shielding layer 170 is used to shield the first busbar 130, the second busbar 140, and at least a portion of the conductor 160, except for the membrane area 101 and the third busbar 150, which are not shielded by the shielding layer 170. The shielding layer 170 is disposed along the edge of the second surface 1112 of the outer glass plate 111. Alternatively, the shielding layer 170 is disposed along the edge of the fourth surface 1132 of the inner glass plate 113.

[0056] Understandably, the shielding layer 170 can decorate the glass edges, making them visually neat. Furthermore, the shielding layer 170 also serves to protect against ultraviolet rays, preventing the fixing components around the electrically heated glass 100 from aging. The fixing components can be made of easily adhered adhesives.

[0057] Furthermore, this application can form a conductive film 120 on the surface of the inner glass plate 113 or the outer glass plate 111 by magnetron sputtering or electrochemical deposition, and then print ink on the edges of the glass plates and the edges of the film removal area 101 to form a shielding layer 170. When the coated glass plate is heated and bent, if the shielding layer 170 completely surrounds the film removal area 101, the shielding layer 170 will partially reflect heat radiation, resulting in a temperature difference between the area of ​​the shielding layer 170 and the temperature of the film removal area 101. Excessive temperature difference can easily lead to optical quality problems in the film removal area 101, and consequently, optical distortion problems in the transmission of the photoelectric signal of the optoelectronic component 210. In this application, by leaving an opening when the shielding layer 170 surrounds the film removal area 101, heat conduction can be maintained between the film removal area 101 and other parts of the conductive film 120, thus improving the temperature difference situation.

[0058] A conductive film 120 is disposed between the outer glass plate 111 and the inner glass plate 113. The conductive film 120 can be disposed on the second surface 1112 of the outer glass plate 111, located between the outer glass plate 111 and the intermediate layer 112. In this case, a shielding layer 170 can be disposed between the second surface 1112 and the conductive film 120, or between the conductive film 120 and the intermediate layer 112, or on the fourth surface 1132 of the inner glass plate 113. Alternatively, the conductive film 120 can be disposed on the third surface 1131 of the inner glass plate 113, located between the intermediate layer 112 and the inner glass plate 113. The orthographic projection of the conductive film 120 onto the outer glass plate 111 coincides with the coating area 102 and does not cover the film removal area 101. That is, the portion of the laminated glass 110 without the conductive film 120 is the film removal area 101.

[0059] The conductive film 120 can be directly deposited onto the second surface 1112 or the third surface 1131 by chemical vapor deposition (CVD) or physical vapor deposition (PVD), for example by magnetron sputtering. Preferably, the transparent conductive film 1204 can withstand high-temperature heat treatment, such as bending or tempering processes. After the conductive film 120 is formed on the inner glass plate 113 or the outer glass plate 111, a portion of the conductive film 120 in the removal area 101 can be removed using processes such as laser removal, mechanical friction removal, chemical etching removal, or cover plate mold removal.

[0060] In some embodiments, the conductive film 120 may be a metal film or a transparent conductive oxide film.

[0061] Furthermore, in some specific embodiments, when the conductive film 120 is a metal film, the metal film includes at least one metal layer and a dielectric layer stacked between the metal layers. The metal layer can be selected from gold (Au), silver (Ag), copper (Cu), aluminum (Al), or molybdenum (Mo). The dielectric layer contains at least one of zinc oxide, tin oxide, indium oxide, titanium oxide, silicon oxide, aluminum oxide, silicon nitride, silicon carbide, aluminum nitride, or titanium metal layers. Exemplarily, the metal film includes two dielectric layers and one silver layer, with the two dielectric layers respectively disposed on opposite sides of the silver layer. In addition, the metal film may also include two, three, or four silver layers, etc., with at least one dielectric layer disposed between adjacent silver layers. It is understood that the dielectric layer can protect the metal layers between them from oxidation, thereby making the electrical performance of the conductive film 120 more stable.

[0062] Furthermore, in some specific embodiments, when the conductive film 120 is a transparent conductive oxide film, the transparent conductive oxide film includes at least one dielectric layer and a conductive layer, wherein the dielectric layer includes at least one of Si oxide, nitride, and oxynitride, and the conductive layer includes at least one of ITO, FTO, AZO, and ATO.

[0063] Please refer to the following: Figure 2 The first busbar 130, the second busbar 140, and the third busbar 150 are all spaced apart, and all three are in electrical contact with the conductive film 120. The first busbar 130, the second busbar 140, and the third busbar 150 can be located on the side of the conductive film 120 away from the intermediate layer 112. The first busbar 130 and / or the second busbar 140 can be 6mm-30mm away from the edge of the conductive film 120.

[0064] For example, the orthographic projection of the first busbar 130 onto the first surface 1111 of the outer glass plate 111 is the first projection. The orthographic projection of the second busbar 140 onto the first surface 1111 of the outer glass plate 111 is the second projection. The orthographic projection of the shielding layer 170 onto the first surface 1111 of the outer glass plate is the third projection. The first projection located in the coating area 102 can fall within the range of the third projection, and all of the second projections can fall within the range of the third projection. Thus, the shielding layer 170 can hide the first busbar 130 and the second busbar 140, beautifying the edge of the electrically heated glass 100. The materials of the first busbar 130 and the second busbar 140 can be metal foil, conductive silver paste, etc. At least a portion of the conductors 160 can have their orthographic projections onto the first surface of the glass plate fall within the range of the third projection.

[0065] The third busbar 150 is located between the outer glass plate 111 and the inner glass plate 113. The third busbar 150 is disposed on the conductive film 120 and is electrically connected to the second busbar 140 through the conductive film 120. The orthogonal projection of the conductive film 120 onto the third busbar 150 covers the third busbar 150. A shielding layer 170 is disposed around the edge of the film removal area 101 and has openings, preventing the shielding layer 170 from completely sealing the film removal area 101. The third busbar 150 can be located at the openings. The third busbar 150 may include conductive silver paste and / or metallic copper foil. The conductive silver paste is a viscous paste composed of high-purity (99.9% purity) metallic silver particles, binders, solvents, and additives. The metallic copper foil is made by hammering copper with a certain proportion of other metals. Copper foil is generally available in 90% and 88% foil types, representing copper contents of 90% and 88%, respectively.

[0066] Understandably, the third busbar 150 can form a logo pattern, which can contain readable information. For example, the logo can be text, a pattern, or a logo.

[0067] The conductor 160 is a conductive heating wire. The conductor 160 bends and extends along the edge of the film removal zone 101, with one end of the conductor 160 in electrical contact with the first busbar 130 and the other end in electrical contact with the third busbar 150. The conductor 160 and the third busbar 150 are arranged along the edge of the film removal zone 101 to form a ring around the film removal zone 101.

[0068] For example, conductor 160 can be enameled wire. Enameled wire consists of an inner layer of conductor materials such as copper, aluminum, or alloy wire, and an outer layer of insulating materials such as polyurethane or polyimide. The diameter of the enameled wire can be between 0.08mm and 0.2mm (inclusive of the endpoint values ​​of 0.08mm and 0.2mm). The resistance of the enameled wire can be between 0.5Ω / m and 3.7Ω / m (inclusive of the endpoint values ​​of 0.5Ω / m and 3.7Ω / m). Preferably, the diameter of the enameled wire can be between 0.1mm and 0.15mm (inclusive of the endpoint values ​​of 0.1mm and 0.15mm), and the resistance of the enameled wire can be between 0.9Ω / m and 2.33Ω / m (inclusive of the breakpoint values ​​of 0.9Ω / m and 2.33Ω / m). Conductor 160 can also be tungsten wire. Tungsten wire is a fine wire made by forging and drawing tungsten bars. The diameter of the tungsten wire can be between 0.02mm and 0.048mm (inclusive of the endpoint values ​​of 0.02mm and 0.048mm), and the resistance of the tungsten wire is between 33Ω / m and 194Ω / m (inclusive of the endpoint values ​​of 33Ω / m and 194Ω / m). Preferably, the diameter of the tungsten wire is 0.048mm, and the resistance of the tungsten wire is 33Ω / m. The conductor 160 can also be a copper wire, the diameter of which can be between 0.01mm and 0.015mm, and the resistance of the copper wire can be 0.017Ω / m.

[0069] Understandably, the conductor 160 can carry current, thereby reducing the heat buildup at the edge of the membrane removal region 101 caused by current convergence.

[0070] In one possible implementation, such as Figure 2 As shown, there can be one wire 160, which is disposed along the edge of the film removal region 101. Specifically, the wire 160 can extend sequentially along the first edge 1011, the third edge 1013, and the second edge 1012.

[0071] In another possible embodiment, please refer to Figure 4 , Figure 4 yes Figure 1The diagram shows another structural schematic of the electrically heated glass 100. The conductor 160 includes a first conductor 161 and a second conductor 162, spaced apart. The third busbar 150 includes a first portion 151 and a second portion 152, spaced apart. The first conductor 161 extends along one side of the film removal region 101, with one end connected to the first busbar 130 and the other end connected to the first portion 151. The second conductor 162 extends along the other side of the film removal region 101. One end of the second conductor 162 is connected to the first busbar 130, and the other end is connected to the second portion 152. The first busbar 130 passes through the film removal region 101 and extends in the X direction. The first conductor 161 can be connected to the intersection of the first busbar 130 and the first edge 1011, and the second conductor 162 can be connected to the intersection of the first busbar 130 and the second edge 1012, thereby transmitting the current that originally flowed through the edge of the conductive film 120 through the first conductor 161 and the second conductor 162. The third busbar 150 is disposed in the coating area 102, and the film removal area 101 can be sequentially spaced from the third busbar 150 in the Y direction.

[0072] In a first possible implementation, the first wire 161 and the second wire 162 may be disposed on opposite sides of the film removal region 101 along a first direction. The first wire 161 may be disposed along the first edge 1011, and the second wire 162 may be disposed along the second edge 1012.

[0073] Understandably, in the prior art, when the current of the conductive film 120 flows through the edges of the film removal region 101 (first edge 1011, second edge 1012, and / or fourth edge 1014), since the conductive film 120 is absent in the film removal region 101, the current can only flow along the edges of the film removal region 101, resulting in excessively high edge temperatures and affecting the optical performance of the film removal region 101. In this application, the first conductor 161 and the second conductor 162 can connect the first busbar 130 and the third busbar 150. This forms an additional loop (first busbar 130 - conductor 160 - third busbar 150), thereby reducing current convergence at the edges of the film removal region 101 and thus reducing heat accumulation at the information acquisition edges.

[0074] For a second possible implementation, please refer to Figure 5 , Figure 5 yes Figure 1 The diagram shows another structural schematic of the electrically heated glass 100. Unlike the first embodiment, the first conductor 161 extends along the first edge 1011 and the third edge 1013, and the second conductor 162 extends along the second edge 1012 and the third edge 1013.

[0075] For a third possible implementation, please refer to Figure 6 , Figure 6 yes Figure 1 The diagram shows another structural schematic of the electrically heated glass 100. Unlike the first embodiment, the first wire 161 extends sequentially along the first edge 1011, the third edge 1013, and the second edge 1012, while the second wire 162 extends along the second edge 1012.

[0076] The third busbar 150 can be located on the conductive film 120 outside the area where the shielding layer 170 is located. The distance between the third busbar 150 and the film removal area 101 can be between 2mm and 100mm. For example, considering the optical path position tolerance and pattern position tolerance of the optoelectronic component 210, the distance from the third busbar 150 to the optical path area of ​​the optoelectronic component 210 in the film removal area 101 is preferably selected to be 5 to 50mm, and more preferably 15 to 25mm.

[0077] Since the third busbar 150 is exposed in the field of vision during actual use, it can be an aesthetically pleasing pattern or a distinctive shape. The distinctive shape of the third busbar 150 is a pattern shape and / or a text shape. The pattern shape of the third busbar 150 comprises multiple identical or different pattern units, which overlap or contact each other to form the pattern shape of the third busbar 150. The pattern shape and / or text shape of the third busbar 150 can include straight stripes and / or curved stripes, with the width of the straight stripes and / or curved stripes L1 between 6mm and 12mm. The radius of curvature of the curved stripes can be between 2mm and 1000mm. The text shape of the third busbar 150 comprises multiple identical or different text units, with at least one connection point between the multiple text units to form the text shape of the third busbar 150.

[0078] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a third busbar 150 provided in an embodiment of this application. The third busbar 150 may include multiple pattern units, each of which is a closed shape, and the multiple closed shapes overlap to form the third busbar 150. The pattern unit can be... Figure 7 The diagram shows a ring, with multiple overlapping rings forming the pattern of the third generatrix 150.

[0079] It is understandable that if the third busbar 150 is located within the area of ​​the shielding layer 170, that is, the orthogonal projection of the third busbar 150 onto the shielding layer 170 falls within the shielding layer 170, in actual use, the shielding layer 170, due to its dark color, will absorb heat, resulting in a higher temperature of the third busbar 150 and a problem of concentrated hot spots. By placing the third busbar 150 outside the shielding layer 170, the problem of heat accumulation on the third busbar 150 due to heat absorption by the shielding layer 170 can be avoided.

[0080] Furthermore, the overlapping arrangement of multiple pattern units allows the third busbar 150 to form a unified whole. After the conductor 160 is connected to the third busbar 150, the third busbar 150 can effectively transfer the current or heat from the conductor 160 to the conductive film 120, thereby reducing the temperature at the edges of the conductor 160 and the conductive film 120 and solving the problem of heat accumulation at the edges of the conductive film 120. The overlapping arrangement of multiple closed patterns can make the shape of the third busbar 150 regular, making its appearance more regular and thus improving the appearance of the electrically heated glass 100.

[0081] Please see Figure 8 , Figure 8 This is a schematic diagram of another structure of the third busbar 150 provided in this application embodiment. The third busbar 150 may also include multiple pattern units, which are spaced apart, and at least one pattern unit is in electrical contact with the conductor 160.

[0082] It is understandable that the pattern unit that is in electrical contact with the wire 160 can transfer the heat of the wire 160 to the conductive film 120, and the heat of the conductive film 120 diffuses to the surroundings. Since there are other pattern units around this pattern unit, the other pattern units can receive the heat of the conductive film 120 and transfer it to a farther distance, thereby realizing the diffusion of the heat of the wire 160 and avoiding the situation of heat concentration.

[0083] It should be noted that the pattern unit can be circular, square, or triangular, etc., and the pattern unit can also be text to display vehicle information. Alternatively, the pattern unit can be any shape required for identification.

[0084] Please refer to the following: Figure 7 The pattern of the third busbar 150 is a closed pattern. Alternatively, the third busbar 150 may also be a pattern with openings. For a first possible embodiment, please refer to... Figure 9 , Figure 9 This is a schematic diagram of another structure of the third busbar 150 provided in this application embodiment. The pattern of the third busbar 150 can be stripes 1501 spliced ​​together from straight lines 150a, and the width of the straight lines 150a can be 0.1mm-50mm.

[0085] In a first possible implementation, the straight line 150a can be printed with silver paste. Preferably, the width of the straight line 150a can be 2mm-12mm (including the endpoint values ​​of 2mm-12mm), and further, the width of the straight line 150a can be 2.5mm-3mm (including the endpoint values ​​of 2.5mm-3mm).

[0086] In a second possible implementation, the straight line 150a can be laid with copper foil. In this implementation, the width of the straight line 150a is preferably 6-12mm, and more preferably 6mm.

[0087] In the second possible embodiment, please refer to [link / reference]. Figure 7 The third busbar 150 can also be a stripe 1501 formed by splicing arcs 150b. The radius of curvature of the arc 150b can be between R2mm and R1000mm (including the endpoint values ​​R2mm and R1000mm).

[0088] In a first possible implementation, the arc 150b can be printed with silver paste. In this implementation, the radius of the arc 150b can be between R2mm and R20mm (including the endpoint values ​​R2mm and R20mm). The arc 150b can be a single closed-loop or open-loop arc 150b, or it can be a closed loop formed by two arcs 150b connected together.

[0089] In a second possible implementation, the arc 150b can be laid with copper foil. In this implementation, the third busbar 150 can be a circular closed-loop structure, and the difference between the outer ring radius R2 and the inner ring radius R1 of the closed-loop structure is 6mm-12mm.

[0090] It is understood that the above description of the shape of the third busbar 150 can be applied to the shape of the first part 151 and / or the second part 152 of the third busbar 150.

[0091] The distance between the third busbar 150 and the film removal area 101 can be between 2mm and 100mm. Preferably, the distance between the third busbar 150 and the film removal area 101 is between 5mm and 50mm. Further, the distance between the third busbar 150 and the film removal area 101 is between 15mm and 25mm.

[0092] The inner glass plate 113 and the outer glass plate 111 also include air surfaces and tin surfaces disposed opposite to each other. One of the first surface 1111 and the second surface 1112 of the outer glass plate 111 is an air surface, and the other is a tin surface. One of the third surface 1131 and the fourth surface 1132 of the inner glass plate 113 is an air surface, and the other is a tin surface. In one possible embodiment, the tin surfaces of the inner glass plate 113 and the outer glass plate 111 can be disposed opposite to each other and connected by an intermediate layer 112. That is, the first surface 1111 of the outer glass plate 111 is an air surface, the second surface 1112 of the outer glass plate 111 is a tin surface, the third surface 1131 of the inner glass plate 113 is a tin surface, and the fourth surface 1132 of the inner glass plate 113 is an air surface. The third busbar 150 can be disposed between the tin surface of the inner glass plate 113 or the outer glass plate 111 and the conductive film 120. The third busbar 150 is prepared by silver paste printing. During sintering, silver ions in the third motherboard 150 migrate, with silver ions (Ag+) migrating to the glass surface through the incompletely melted silver layer. The migration reaction is as follows: Ag... + +Sn 2+ => 2AgO + Sn 4+ The polyvalent tin on the tin surface reduces silver ions, forming silver complexes, which causes the markings formed by the third motherboard to appear reddish-brown.

[0093] In another possible embodiment, the air surfaces of the inner glass plate 113 and the outer glass plate 111 can be arranged opposite each other and connected by an intermediate layer 112. That is, the first surface 1111 of the outer glass plate 111 is a tin surface, the second surface 1112 of the outer glass plate 111 is an air surface, the third surface 1131 of the inner glass plate 113 is an air surface, and the fourth surface 1132 of the inner glass plate 113 is a tin surface. The third busbar 150 can be disposed between the inner glass plate 113 or the outer glass plate 111 and the conductive film 120. The third busbar 150 is prepared by silver paste printing. The silver in the third busbar 150 can react with oxygen or carbon dioxide in the air to form Ag2O and Ag2CO3, thereby making the mark formed by the third busbar appear yellowish-brown.

[0094] Therefore, the color of the electrically heated glass 100 can be adjusted by changing the arrangement of the inner glass plate 113 and the outer glass plate 111. In practical use, the third busbar 150 can be printed on the tin side or the air side depending on the usage requirements of different scenarios.

[0095] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An electrically heated glass, characterized in that, include: An outer glass plate, a middle layer, and an inner glass plate are stacked together, with the outer glass plate and the inner glass plate fixedly connected by the middle layer; A conductive film is disposed on the outer glass plate near the intermediate layer, or the conductive film is disposed on the inner glass plate near the intermediate layer, and at least one film removal area for signal transmission is provided in the conductive film. A first busbar, a second busbar, and a third busbar are provided at intervals. The first busbar, the second busbar, and the third busbar are all in electrical contact with the conductive film. The third busbar has a distinctive shape. The conductor, the third busbar is electrically connected to the first busbar through the conductor, the conductor and the third busbar are arranged along the edge of the film removal area to form a ring around the film removal area, and the conductor and the third busbar are both located in the area where the conductive film is located.

2. The electrically heated glass according to claim 1, characterized in that, It also includes a shielding layer, which is disposed on the side of the outer glass plate near the intermediate layer and / or on the side of the inner glass plate near the intermediate layer. The shielding layer is disposed along the edge of the electrically heated glass. The shielding layer is used to shield the first busbar, the second busbar and at least part of the conductor. The film removal area and the third busbar are not shielded by the shielding layer.

3. The electrically heated glass according to claim 2, characterized in that, The shielding layer is arranged around the edge of the film removal area and has an opening, so that the shielding layer does not completely close off the film removal area, and the third busbar is located at the opening.

4. The electrically heated glass according to claim 1, characterized in that, The conductor includes a first conductor and a second conductor, which are disposed on opposite sides of the film removal zone. The third busbar includes a first part and a second part, which are spaced apart. One end of the first conductor is connected to the first busbar and extends along one side of the film removal zone. The other end of the first conductor is connected to the first part. One end of the second conductor is connected to the first busbar and extends along the other side of the film removal zone. The other end of the second conductor is connected to the second part.

5. The electrically heated glass according to claim 4, characterized in that, The film removal area includes a first edge and a second edge disposed opposite to each other, and a third edge and a fourth edge disposed opposite to each other. The third edge and the fourth edge are connected between the first edge and the second edge. The first wire extends along the first edge and the third edge, and the second wire extends along the second edge and the third edge.

6. The electrically heated glass according to claim 4, characterized in that, The film removal area includes a first edge and a second edge disposed opposite to each other, and a third edge and a fourth edge disposed opposite to each other. The third edge and the fourth edge are connected between the first edge and the second edge. The first wire extends sequentially along the first edge, the third edge and the second edge, and the second wire extends along the second edge.

7. The electrically heated glass according to any one of claims 4-6, characterized in that, The film removal area includes a first edge and a second edge arranged opposite to each other, and a third edge and a fourth edge arranged opposite to each other. The third edge and the fourth edge are connected between the first edge and the second edge. The first busbar intersects with the first edge and the second edge. The first conductor is connected at the intersection of the first busbar and the first edge. The second conductor is connected at the intersection of the first busbar and the second edge.

8. The electrically heated glass according to claim 1, characterized in that, The conductive film is a metal film or a transparent conductive oxide film.

9. The electrically heated glass according to claim 1, characterized in that, The distinctive shape of the third busbar is a pattern shape and / or a text shape.

10. The electrically heated glass according to claim 9, characterized in that, The pattern and / or text shape of the third busbar includes straight stripes and / or curved stripes, the width of which is between 6mm and 12mm.

11. The electrically heated glass according to claim 10, characterized in that, When the pattern shape of the third busbar includes curved stripes, the radius of curvature of the curved stripes is 2mm-1000mm.

12. The electrically heated glass according to claim 10, characterized in that, The pattern shape of the third busbar includes multiple identical or different pattern units, which overlap or contact each other to form the pattern shape of the third busbar.

13. The electrically heated glass according to claim 10, characterized in that, The text shape of the third busbar includes multiple identical or different text units, and there is at least one connection point between the multiple text units to connect the multiple text units to form the text shape of the third busbar.

14. The electrically heated glass according to claim 1, characterized in that, The distance between the third busbar and the film removal zone is 2mm-100mm.

15. The electrically heated glass according to claim 1, characterized in that, The electrically heated glass is curved glass, and the vertical radius of curvature of the electrically heated glass from the bottom edge to the top edge is 4000mm-20000mm.

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