Electrically heated glass and vehicle

Abstract

The present application provides electrically heated glass and a vehicle. The electrically heated glass comprises a glass body, first and second bus bars, a shielding layer, and a plurality of first heating structures. The glass body comprises interconnected front windshield and sunroof glass regions, and the front windshield glass region has a visible area. The first and second bus bars are connected to the glass body, are located at the edge of the front windshield glass region away from the sunroof glass region, and are spaced apart from the visible area. The first and second bus bars are spaced apart in the width direction of the glass body, and have opposite polarities. The shielding layer is connected to an outer edge of the glass body, is spaced apart from the visible area, and covers the first and second bus bars. The plurality of first heating structures are spaced apart and connected to the glass body, and are located in the front windshield glass region. One end of each first heating structure is electrically connected to the first bus bar and the other end is electrically connected to the second bus bar. The plurality of first heating structures are sequentially spaced apart and nested layer by layer between the first bus bar and the second bus bar. According to the technical solution of the present application, defrosting and defogging can be achieved without affecting appearance and the field of view of a driver.

Description

Electric Heated Glass and Vehicles

[0001] This application claims priority to Chinese Patent Application No. 202411508411.1, filed on October 28, 2024, entitled “Electrically Heated Glass and Vehicle”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of automotive technology, and more particularly to an electrically heated glass and vehicle. Background Technology

[0003] In cold weather, car windows are prone to fogging or even frost formation. Fogging and frost can severely impair a driver's vision and pose a significant safety hazard, especially for the windshield. Therefore, electric heating elements are usually installed in the glass to heat it and achieve the purpose of defogging or defrosting.

[0004] A panoramic windshield is a single, large-curved, unobstructed windshield. Compared to a regular windshield, a panoramic windshield has a larger surface area and better aesthetics, providing users with a superior visual experience. Currently, heating the entire panoramic windshield results in poor defogging and defrosting performance due to the significantly longer heating circuit compared to a regular windshield. Heating only the windshield portion exposes the wiring harness in the unobstructed transition area, leading to an unsightly appearance and potentially obstructing the driver's view. Summary of the Invention

[0005] Embodiments of this application provide an electrically heated glass that can meet defogging and defrosting performance without affecting the appearance and driver's visibility.

[0006] In a first aspect, this application provides an electrically heated glass, the electrically heated glass comprising:

[0007] A glass body, the glass body comprising a windshield area and a sunroof area connected together, the windshield area having a visible area;

[0008] A first busbar and a second busbar are connected to the glass body and located at the edge of the windshield area away from the sunroof area, and are spaced apart from the visible area. The first busbar and the second busbar are spaced apart in the width direction of the glass body, and the polarity of the first busbar is opposite to that of the second busbar.

[0009] A shielding layer, wherein the shielding layer is connected to the outer edge of the glass body and is spaced apart from the visible area, the shielding layer covering the first busbar and the second busbar; and

[0010] Multiple first heating structures are connected to the glass body and located in the windshield area. One end of each first heating structure is electrically connected to the first busbar, and the other end of each first heating structure is electrically connected to the second busbar. The multiple first heating structures are arranged sequentially and nested between the first busbar and the second busbar. At least one first heating structure extends across the visible area along the length of the glass body.

[0011] Understandably, when electrically heated glass is used as a panoramic windshield, heating the entire glass—that is, heating the entire panoramic windshield—would result in poor heating performance due to the significantly longer heating structure compared to a conventional windshield. This would lead to ineffective defogging and defrosting. Adding a busbar at the connection point between the windshield and sunroof areas would allow heating only the windshield area; however, this would expose the busbar, affecting the appearance of the heated glass and the driver's visibility.

[0012] Therefore, in the embodiments of this application, by positioning the first and second busbars at the edges of the windshield area away from the sunroof area, and extending the first heating structure by bending between the first and second busbars and passing through the visible area, the folding of the first heating structure can be achieved while ensuring its heating performance meets operational requirements. This allows the entire first heating structure to be located within the windshield area, enabling it to heat only that area. Furthermore, the first and second busbars can be shielded by a shielding layer, preventing them from being exposed and improving the appearance of the electrically heated glass while providing good visibility for the driver and passengers. In addition, the bending extension of the first heating structure between the first and second busbars allows for a wider range of length adjustment based on the needs of the electrically heated glass.

[0013] In one possible implementation, the visible area includes a first field of view and a second field of view, the field of view of the second field of view includes the field of view of the first field of view, and each of the first heating structures includes a first segment, a second segment, and a third segment.

[0014] One end of the first segment is connected to the first busbar, and the other end of the first segment is connected to one end of the second segment. The first segment extends along the length of the glass body, and at least one of the first segments crosses the first field of view and the second field of view.

[0015] The other end of the second segment is connected to one end of the third segment. The second segment extends along the width direction of the glass body. In the length direction of the glass body, the second segment and the first generatrix are located on opposite sides of the second field of view.

[0016] The other end of the third segment is connected to the second busbar, the third segment extends along the length of the glass body, and at least one of the third segments spans the first field of view and the second field of view.

[0017] In one possible implementation, the spacing between two adjacent second segments is in the range of 1mm-d2mm, where d2 is the length of the second segment of the innermost first heating structure along the width direction of the glass body.

[0018] In one possible implementation, the first busbar, the second busbar, and any one of the first heating structures form a first heating circuit;

[0019] Multiple first heating circuits are arranged from the inside out in the order from the center region of the first and second fields of view to the edge region of the first and second fields of view. Among two adjacent first heating circuits, the length of the first heating circuit located in the inner circle is less than the length of the other first heating circuit located in the outer circle.

[0020] In one possible implementation, the area enclosed by the projection of the outermost first heating circuit onto the glass body covers the second field of view.

[0021] In one possible implementation, the edge of the windshield region away from the sunroof region is the first edge of the glass body, and the edge of the sunroof region away from the windshield region is the second edge of the glass body, with the first edge and the second edge being disposed opposite to each other in the length direction of the glass body;

[0022] The first busbar and the second busbar are close to the first edge;

[0023] In the plurality of first heating circuits, the length of the innermost first heating circuit is less than or equal to the distance between the first edge and the second edge, and / or, in the plurality of first heating circuits, the length of the outermost first heating circuit is less than or equal to the distance between the first edge and the second edge.

[0024] In one possible implementation, when the length of the first heating circuit is greater than a preset length, the shape of the first heating circuit is straight; when the length of the first heating circuit is less than the preset length, the shape of the first heating circuit is wavy.

[0025] The preset length is the length of the glass body × a first ratio × a second ratio, where the ratio of the first ratio is in the range of 0.2-1 and the ratio of the second ratio is in the range of 1.35-1.4.

[0026] In one possible implementation, the ratio of the first proportion is in the range of 0.44-0.67.

[0027] In one possible implementation, the length of the glass body is in the range of 1200mm-2500mm.

[0028] In one possible implementation, the length of the glass body is in the range of 1500mm-1800mm.

[0029] In one possible implementation, the electrically heated glass further includes a third busbar connected to the glass body and located at the edge of the windshield area, and spaced apart from the visible area. The third busbar and the second busbar are spaced apart in the width direction of the glass body, and are located on opposite sides of the second busbar, respectively. The polarity of the third busbar is opposite to that of the second busbar.

[0030] The electrically heated glass further includes a second heating structure, which is connected to the glass body and located in the windshield area. It is spaced apart from the first heating structure in the width direction of the glass body. One end of the second heating structure is electrically connected to the second busbar, and the other end of the first heating structure is electrically connected to the third busbar. The first heating structure bends and extends between the second busbar and the third busbar, and crosses the visible area.

[0031] In one possible implementation, the second busbar includes a first sub-busbar and a second sub-busbar, which are spaced apart in the width direction of the glass body and have the same polarity. One of the first sub-busbar and the second sub-busbar is electrically connected to the first heating structure, and the other is electrically connected to the second heating structure.

[0032] Secondly, this application also provides a vehicle, the vehicle including a body sheet and electrically heated glass as described above, the electrically heated glass being connected to the body sheet. Attached Figure Description

[0033] Figure 1 is a schematic diagram of a possible structure of a vehicle provided in an embodiment of this application;

[0034] Figure 2 is a schematic diagram of another possible structure of the vehicle provided in an embodiment of this application;

[0035] Figure 3 is a cross-sectional structural diagram of an electrically heated glass provided in an embodiment of this application;

[0036] Figure 4 is a cross-sectional schematic diagram of a portion of the structure of the glass body obtained by cutting along section line AA shown in Figure 3.

[0037] Figure 5 is another cross-sectional schematic diagram of a portion of the glass body obtained by cutting along section line AA shown in Figure 3.

[0038] Figure 6 is another cross-sectional schematic diagram of a portion of the glass body obtained by cutting along section line AA shown in Figure 3.

[0039] Figure 7 is a schematic cross-sectional view of another electrically heated glass provided in an embodiment of this application;

[0040] Figure 8 is a schematic cross-sectional view of another electrically heated glass provided in an embodiment of this application.

[0041] Reference numerals: Vehicle 200, electrically heated glass 100, body sheet metal 210, glass body 10, first busbar 20, second busbar 30, third busbar 40, edge busbar 50, first heating structure 60, second heating structure 70, windshield area 101, sunroof area 102, outer glass panel 11, inner glass panel 12, intermediate layer 13, shielding layer 14, first surface 111, second surface 112, third surface 121, fourth surface 122, first field of view 110, second field of view 120, third field of view 130, fourth field of view 140, first heating circuit C1, second heating circuit C2, first edge 150, second edge 160, first sub-busbar 31, second sub-busbar 32, first segment 61, second segment 62, third segment 63, fourth segment 71, fifth segment 72, sixth segment 73. Detailed Implementation

[0042] For ease of understanding, the terminology used in the embodiments of this application will be explained first.

[0043] 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.

[0044] Multiple: refers to two or more.

[0045] 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.

[0046] The specific embodiments of this application will now be clearly described in conjunction with the accompanying drawings.

[0047] Embodiments of this application provide an electrically heated glass and a vehicle.

[0048] Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of one possible structure of the vehicle 200 provided in an embodiment of this application, and Figure 2 is a schematic diagram of another possible structure of the vehicle 200 provided in an embodiment of this application.

[0049] Vehicle 200 may include electrically heated glass 100 and body sheet 210. The electrically heated glass 100 is connected to the body sheet 210. As shown in Figure 1, the electrically heated glass 100 may be the windshield of vehicle 200. Alternatively, as shown in Figure 2, the electrically heated glass 100 may also be a panoramic windshield.

[0050] A panoramic windshield can be a single, integrated structure combining the windshield and sunroof. It's a large, curved, unobstructed window that offers a superior visual experience compared to a conventional windshield, making it widely popular. Although a panoramic windshield is a single unit, it can be divided into two parts: the windshield area and the sunroof area.

[0051] Understandably, in cold weather, car windows are prone to fogging and / or frost, severely impairing the driver's visibility and posing a significant safety hazard. Therefore, car windows need to have a certain degree of heating capability to ensure the driver's visibility in cold weather.

[0052] It should be noted that Figures 1 and 2 are only intended to schematically illustrate the connection relationship between the vehicle 200 and the electrically heated glass 100, and are not intended to specifically limit the connection position, specific structure and quantity of each device. The vehicle 200 may include more or fewer components than shown in the figure, or combine some components, or separate some components, or have different component arrangements.

[0053] The following explanation will use electrically heated glass 100 as an example of a panoramic windshield, but it should be understood that this is not the only explanation.

[0054] Understandably, in related technologies, electrically heated glass typically uses heating wires for heating. The heating wire satisfies the formulas: P = U² / R and R = ρ × L / S, where P is power, U is voltage, R is resistance, ρ is the resistivity of the material, L is the length of the conductor, and S is the cross-sectional area of ​​the conductor. Based on the formulas for the power and resistance of the heating wire, it can be seen that the longer the heating wire (L), the greater the resistance (R), and therefore the smaller the power (P), resulting in poorer heating performance.

[0055] Therefore, if the electrically heated glass is a panoramic windshield, and the entire panoramic windshield is heated, the heating circuit of the panoramic windshield is much longer than that of a conventional windshield. Based on the principle that the longer the heating wire, the worse its heating performance, this will result in poor defogging and defrosting performance. If a busbar is added at the connection point between the windshield and sunroof areas of the panoramic windshield, it can be heated only on the windshield, just like a conventional windshield. However, the drawback of this solution is that when the connection point between the windshield and sunroof areas is unobstructed, the busbar will be exposed, affecting the appearance of the glass and the driver's visibility.

[0056] Based on this, embodiments of this application provide an electrically heated glass 100 that can meet heating performance requirements without affecting the glass's appearance or the driver's visibility.

[0057] Please refer to Figure 3, which is a cross-sectional structural schematic diagram of an electrically heated glass 100 provided in an embodiment of this application.

[0058] The electrically heated glass 100 may include a glass body 10, a first busbar 20, a second busbar 30, a third busbar 40, an edge busbar 50, a first heating structure 60, and a second heating structure 70. The glass body 10 may include a windshield area 101 and a sunroof area 102. The sunroof area 102 is connected to one side of the windshield area 101. The glass body 10 is a panoramic windshield. The windshield area 101 of the glass body 10 may correspond to a conventional windshield, and the sunroof area 102 of the glass body 10 may correspond to a conventional sunroof. The first busbar 20, the second busbar 30, the third busbar 40, the first heating structure 60, and the second heating structure 70 are all connected to the glass body 10 and located in the windshield area 101 of the glass body 10. The edge busbar 50 is connected to the glass body 10 and located in the sunroof area 102 of the glass body 10.

[0059] In some embodiments, the electrically heated glass 100 may also be without the edge busbar 50, and / or without the second heating structure 70 and the third busbar 40.

[0060] Please refer to Figure 4, which is a cross-sectional schematic diagram of a portion of the structure of the glass body 10 obtained by cutting along section line AA shown in Figure 3. The glass body 10 may include an outer glass panel 11, an inner glass panel 12, and an intermediate layer 13. The outer glass panel 11, the intermediate layer 13, and the inner glass panel 12 are stacked sequentially. A portion of the outer glass panel 11, a portion of the inner glass panel 12, and a portion of the intermediate layer 13 together constitute the windshield area 101 of the glass body 10, while another portion of the outer glass panel 11, another portion of the inner glass panel 12, and another portion of the intermediate layer 13 together constitute the sunroof area 102 of the glass body 10.

[0061] The outer glass panel 11 may include a first surface 111 and a second surface 112. The first surface 111 is the surface of the outer glass panel 11 facing the outside of the vehicle 200, i.e., the outer surface of the glass body 10. The second surface 112 is the surface of the outer glass panel 11 facing the inside of the vehicle 200. Exemplarily, the outer glass panel 11 can be prepared by a high-temperature bending process at at least 500°C. The thickness of the outer glass panel 11 can be in the range of 1.6mm-5.0mm (inclusive of the endpoint values ​​of 1.6mm and 5.0mm). For example, the thickness of the outer glass panel 11 can be 1.6mm, 1.8mm, 2.1mm, 2.6mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc. Preferably, the thickness of the outer glass panel 11 can be 1.8mm or 2.1mm. The material of the outer glass panel can be clear glass, ordinary green glass, solar green glass, etc.

[0062] The inner glass panel 12 may include a third surface 121 and a fourth surface 122. The third surface 121 is the surface of the inner glass panel 12 facing the outside of the vehicle 200. The fourth surface 122 is the surface of the inner glass panel 12 facing the inside of the vehicle 200. The third surface 121 of the inner glass panel 12 may be disposed opposite to the second surface 112 of the outer glass panel 11. Exemplarily, the inner glass panel 12 may be prepared by a high-temperature bending process at at least 500°C. The thickness of the inner glass panel 12 may be in the range of 0.7 mm to 5.0 mm (inclusive). For example, the thickness of the inner glass panel 12 may be 0.7 mm, 1.1 mm, 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. Preferably, the thickness of the inner glass panel 12 may be 1.8 mm or 2.1 mm. The inner glass plate 12 can be made of clear glass, ordinary green glass, solar green glass, etc.

[0063] Intermediate layer 13 connects the second surface 112 of the outer glass plate 11 and the third surface 121 of the inner glass plate 12, serving to connect the outer glass plate 11 and the inner glass plate 12. Intermediate layer 13 can be a single-layer or multi-layer structure; multi-layer structures can be double-layer, triple-layer, quadruple-layer, or five-layer structures, etc. For example, intermediate layer 13 can be a thermoplastic intermediate layer. The material of intermediate layer 13 can be polycarbonate (PC), polyvinyl chloride (PVC), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR), or ionomer film (Sentry Glas Plus, SGP), etc.

[0064] The intermediate layer 13 also has many functional roles, including at least one or more of the following:

[0065] Firstly, the intermediate layer 13 may include at least one colored area, which serves a shading function. The embodiments of this application do not impose strict requirements on the position of the colored area in the intermediate layer 13; it can be any position that meets the requirements for use with the electrically heated glass 100. For example, a colored area can be provided at the top of the windshield area 101 as a shadow strip to reduce sunlight interference with the human eye, wherein the top of the windshield area 101 is the position of the windshield area 101 near the sunroof area 102. Alternatively, a colored area can be provided at the bottom of the windshield area 101 to serve a shading function, wherein the bottom of the windshield area 101 is the position of the windshield area 101 away from the sunroof area 102. Alternatively, colored areas can be provided at both the top and bottom of the windshield area 101, and a transparent area can be provided in the area between the top and bottom of the windshield area 101; this transparent area can be composed of two or three layers of film spliced ​​together.

[0066] Secondly, during the preparation of the intermediate layer 13, an infrared absorber can be added, enabling the completed intermediate layer 13 to possess heat and light absorption functions. This infrared absorber can not only block light rays from reaching the vehicle interior, but also reduce the temperature inside the vehicle by blocking sunlight, thereby achieving the effect of absorbing both light and heat.

[0067] Thirdly, the intermediate layer 13, which has a multi-layered structure, may include at least two functional layers. These functional layers can serve as sound insulation or head-up display functions. For example, one of the at least two layers may have a higher plasticizer content, thus providing sound insulation. Alternatively, one of the at least two layers may be wedge-shaped, thus providing a head-up display function. In the design of the head-up display system for vehicle 200, the problem of ghosting is frequently encountered. This is because the windshield area 101 is a double-layered glass. When the light from the head-up display system is projected onto the electrically heated glass 100, it undergoes two optical reflections on the outer glass panel 11 and the inner glass panel 12, resulting in ghosting when it reaches the human eye. The presence of ghosting not only reduces image quality but also causes dizziness for the viewer, affecting the driver's driving experience and creating safety hazards. Setting the intermediate layer 13 to a wedge shape can act similarly to an optical prism, changing the propagation direction of reflected light and preventing image ghosting.

[0068] Referring to Figure 3, in an embodiment of this application, the windshield area 101 may have a visible area (not shown). This visible area may include a first field of view 110, a second field of view 120, a third field of view 130, and a fourth field of view 140. The field of view of the second field of view 120 includes the field of view of the first field of view 110, and the center of the first field of view 110 coincides with the center of the second field of view 120. The field of view of the fourth field of view 140 includes the field of view of the third field of view 130, and the center of the third field of view 130 coincides with the center of the fourth field of view 140. The first and second field of view 110 are mirror images of the third and fourth field of view 130 along the width direction of the glass body 10.

[0069] The first field of view 110, the second field of view 120, the third field of view 130 and the fourth field of view 140 are determined according to the provisions of standard ECE R43 or GB 11562.

[0070] Please refer to Figures 5 and 6. Figure 5 is another cross-sectional view of a portion of the structure of the glass body 10 obtained by cutting along section line AA shown in Figure 3. Figure 6 is yet another cross-sectional view of a portion of the structure of the glass body 10 obtained by cutting along section line AA shown in Figure 3.

[0071] The glass body 10 may further include a shielding layer 14. The shielding layer 14 may be connected to the glass body 10 and located at the outer edge of the glass body 10, extending along the circumferential direction of the glass body 10. The shielding layer 14 may be disposed around the entire outer edge of the glass body 10. Alternatively, the shielding layer 14 may be disposed on one or more edges of the outer edge of the glass body 10. The shielding layer 14 may be spaced apart from the visible area and cover the first busbar 20, the second busbar 30, the third busbar 40, and the edge busbar 50.

[0072] Specifically, as shown in Figure 5, the shielding layer 14 can be disposed on the second surface 112 of the outer glass panel 11. The shielding layer 14 is located around the first viewing area 110, the second viewing area 120, the third viewing area 130, and the fourth viewing area 140 to avoid obstructing the driver's and passengers' view. Alternatively, the shielding layer 14 can be located around the third viewing area 130 and the fourth viewing area 140. Or, as shown in Figure 6, the shielding layer 14 can be disposed on the fourth surface 122 of the inner glass panel 12. Exemplarily, the material of the shielding layer 14 can be ink. The ink can be ceramic ink or ultraviolet ink.

[0073] It is understood that by providing a shielding layer 14 on the second surface 112 of the outer glass panel 11 and / or the fourth surface 122 of the inner glass panel 12, the appearance of the vehicle 200 can be improved, the internal components can be protected, and the local adhesion can be enhanced.

[0074] Of course, in other embodiments, the intermediate layer 13 with coloring function can also be used as the masking layer 14, and there is no strict limitation on this.

[0075] In this embodiment, the visible light transmittance of the shielding layer 14 can be less than or equal to 5.0%. Preferably, the visible light transmittance is less than or equal to 1.5%. The shielding layer 14 can not only block light from interfering with the driver, but also shield the busbar and heating structure, thus improving the appearance of the car.

[0076] Referring again to Figure 3, the glass body 10 may further include a first edge 150 and a second edge 160. The first edge 150 and the second edge 160 are disposed opposite to each other along the length of the glass body 10. The first edge 150 may be the lower edge of the windshield region 101, that is, the edge of the windshield region 101 away from the sunroof region 102. The second edge 160 may be the upper edge of the sunroof region 102, that is, the edge of the sunroof region 102 away from the windshield region 101.

[0077] The first busbar 20, the second busbar 30, and the third busbar 40 are all located in the windshield area 101 and are positioned close to the first edge 150 of the glass body 10. The first busbar 20, the second busbar 30, and the third busbar 40 can be arranged sequentially and at intervals along the width direction of the glass body 10. The first busbar 20, the second busbar 30, and the third busbar 40 can be covered by a shielding layer 14, so that they are concealed and not exposed, which is beneficial to improving the overall heating performance of the electrically heated glass 100. In other words, the orthographic projection of the shielding layer 14 on the glass body 10 can cover the orthographic projections of the first busbar 20, the second busbar 30, and the third busbar 40 on the glass body 10. The first busbar 20 and the second busbar 30 have opposite polarities, while the first busbar 20 and the third busbar 40 have the same polarity. For example, the polarity of the first busbar 20 can be positive, the polarity of the second busbar 30 can be negative, and the polarity of the third busbar 40 can be positive. Alternatively, the polarity of the first busbar 20 can be negative, the polarity of the second busbar 30 can be positive, and the polarity of the third busbar 40 can be negative.

[0078] The edge generatrix 50 is located in the skylight glass area 102 and is positioned near the second edge 160 of the glass body 10. The edge generatrix 50 extends along the width direction of the glass body 10. The edge generatrix 50 can be covered by the shielding layer 14 so that it is concealed and not exposed, which is beneficial to improving the overall heating performance of the electrically heated glass 100. In other words, the orthographic projection of the shielding layer 14 on the glass body 10 can cover the orthographic projection of the edge generatrix 50 on the glass body 10. The first generatrix 20, the second generatrix 30, and the third generatrix 40 are positioned opposite the edge generatrix 50 in the length direction of the glass body 10.

[0079] In the glass body 10, along its length, the distances between the first busbar 20, the second busbar 30, and the third busbar 40 and the first edge 150 can be 5mm to 30mm (including the endpoint values ​​of 5mm and 30mm). The distance between the edge busbar 50 and the second edge 160 can also be 5mm to 30mm (including the endpoint values ​​of 5mm and 30mm). The materials of the first busbar 20, the second busbar 30, the third busbar 40, and the edge busbar 50 can be metal foil, conductive silver paste, etc. The first busbar 20, the second busbar 30, the third busbar 40, and the edge busbar 50 can be disposed between the outer glass plate 11 and the inner glass plate 12. For example, the first busbar 20, the second busbar 30, the third busbar 40, and the edge busbar 50 can be disposed between the outer glass plate 11 and the intermediate layer 13. Alternatively, the first busbar 20, the second busbar 30, the third busbar 40, and the edge busbar 50 can be disposed between the inner glass plate 12 and the intermediate layer 13.

[0080] The first heating structure 60 and the second heating structure 70 are both located in the windshield area 101 and are spaced apart along the width direction of the electrically heated glass 100. The first heating structure 60 can correspond to the driver's seat, and the second heating structure 70 can correspond to the passenger seat. The first heating structure 60 and the second heating structure 70 can be disposed between the outer glass panel 11 and the inner glass panel 12. For example, the first heating structure 60 and the second heating structure 70 can be disposed between the outer glass panel 11 and the intermediate layer 13, or the first heating structure 60 and the second heating structure 70 can be disposed between the inner glass panel 12 and the intermediate layer 13.

[0081] Furthermore, the first heating structure 60 and the second heating structure 70 can be conductive heating structures that generate heat after being energized to achieve the defrosting and defogging functions of the electrically heated glass 100. Exemplarily, the first heating structure 60 and the second heating structure 70 can be heating wires, such as tungsten wires, which are thin wires made by forging and drawing tungsten strips. The diameter of the heating wire can be 0.018 mm to 0.15 mm, preferably 0.018 mm to 0.027 mm. The resistance of the heating wire can be 33 Ω / m to 194 Ω / m, preferably 30 Ω / m to 194 Ω / m. All the numerical ranges mentioned above include endpoint values.

[0082] Please refer to Figure 3. In this embodiment, one end of the first heating structure 60 is electrically connected to the first busbar 20, and the other end of the first heating structure 60 is electrically connected to the second busbar 30. The first heating structure 60 extends and bends between the first busbar 20 and the second busbar 30. The first heating structure 60, the first busbar 20, and the second busbar 30 together form the first heating circuit C1. Exemplarily, the first heating structure 60 can extend beyond the first field of view 110 and the second field of view 120.

[0083] Understandably, when the electrically heated glass 100 is used as a panoramic windshield, heating the entire glass 100—that is, heating the entire panoramic windshield—would result in poor heating performance due to the significantly longer heating structure compared to a conventional windshield. This would lead to ineffective defogging and defrosting. Adding a busbar at the connection point between the windshield area 101 and the sunroof area 102 of the electrically heated glass 100 would allow heating only the windshield area 101; however, this would expose the busbar at the connection point, affecting the appearance of the electrically heated glass 100 and the driver's visibility.

[0084] Therefore, in the embodiments of this application, by positioning the first busbar 20 and the second busbar 30 at the edge of the windshield region 101 away from the sunroof region 102 (i.e., at the first edge 150 of the glass body 10), and by extending the first heating structure 60 by bending between the first busbar 20 and the second busbar 30, and passing through the visible area (i.e., the first field of view 110 and the second field of view 120), the first heating structure 60 can be folded while ensuring that its heating performance meets the operational requirements. This allows the first heating structure 60 to be entirely located within the windshield region 101, enabling it to heat only the windshield region 101. Furthermore, the first busbar 20 and the second busbar 30 can be shielded by the shielding layer 14, preventing them from being exposed. This improves the appearance of the electrically heated glass 100 and provides the driver and passengers with good visibility. In addition, the first heating structure 60 bends and extends between the first busbar 20 and the second busbar 30. This arrangement allows the first heating structure 60 to have a greater range of length adjustment according to the needs of the electrically heated glass 100.

[0085] The first heating structure 60 may include a first segment 61, a second segment 62, and a third segment 63. The first segment 61, second segment 62, and third segment 63 are connected sequentially. One end of the first segment 61 is connected to the first busbar 20, and the other end of the first segment 61 extends away from the first busbar 20 and connects to one end of the second segment 62. The first segment 61 may extend along the length of the glass body 10. The second segment 62 is bent and connected to the first segment 61, and the second segment 62 may extend along the width of the glass body 10. The second segment 62 is above the boundary line of the first field of view 110 and the second field of view 120 to avoid obstructing the driver's or passenger's view. The boundary line of the first field of view 110 and the second field of view 120 is the boundary line of the first edge 150 of the first field of view 110 and the second field of view 120 away from the glass body 10. Along the length of the glass body 10, the second segment 62 and the first busbar 20 are located on opposite sides of the second field of view 120. One end of the third segment 63 is connected to the other end of the second segment 62, and the other end of the third segment 63 is connected to the second busbar 30. The third segment 63 can extend along the length direction of the glass body 10. The third segment 63 can be arranged opposite to the first segment 61 in the width direction of the glass body 10. For example, the extension direction of the third segment 63 can be arranged parallel to the extension direction of the first segment 61.

[0086] The second segment 62 is located on the side of the second field of vision 120 away from the first busbar 20 and the second busbar 30. It can be understood that the second segment 62 is a transverse filament segment in the first heating structure 60. By limiting the length of the second segment 62, the total extension length of the first heating structure 60 can be controlled to avoid affecting the driver's and passengers' field of vision.

[0087] There can be multiple first heating structures 60. One end of each first heating structure 60 is electrically connected to the first busbar 20, and the other end of each first heating structure 60 is electrically connected to the second busbar 30. Multiple first heating structures 60, together with the first busbar 20 and the second busbar 30, can form multiple first heating circuits C1. That is, the first busbar 20, the second busbar 30, and any one of the first heating structures 60 form a first heating circuit C1. Multiple first heating structures 60 are arranged sequentially and nested between the first busbar 20 and the second busbar 30. At least one first heating structure 60 extends across the visible area along the length of the glass body 10. At least one first segment 61 spans the first viewing area 110 and the second viewing area 120. At least one third segment 63 spans the first viewing area 110 and the second viewing area 120. Specifically, a first heating structure 60 is arranged starting from the side of the first busbar 20 closest to the second busbar 30. The first heating structure 60 is then electrically connected to the side of the second busbar 30 closest to the first busbar 20, thus forming a first heating circuit C1. This first heating circuit C1 is the innermost heating circuit C1. Similarly, wiring is spaced along the width of the glass body 10, with the nth first heating structure 60 arranged at the outermost edge, forming the nth first heating circuit C1. This nth first heating circuit C1 is the outermost heating circuit C1. The length of the first heating circuit C1 gradually increases from the innermost edge to the outermost edge. The length of the first heating circuit C1 can be equal to the sum of the lengths of the first segment 61, the second segment 62, and the third segment 63.

[0088] In other words, multiple first heating circuits C1 are arranged from the inside out in the order from the center region of the first field of view 110 and the second field of view 120 to the edge region of the first field of view 110 and the second field of view 120. Among two adjacent first heating circuits C1, the length of the first heating circuit C1 located in the inner circle is less than the length of the other first heating circuit C1 located in the outer circle.

[0089] One end of the second heating structure 70 is electrically connected to the second busbar 30, and the other end of the second heating structure 70 is electrically connected to the third busbar 40. The second heating structure 70 extends and bends between the second busbar 30 and the third busbar 40. The second heating structure 70, the second busbar 30, and the third busbar 40 together form a second heating circuit C2. Exemplarily, the second heating structure 70 may extend beyond the third viewing area 130 and the fourth viewing area 140.

[0090] It is understood that in the embodiments of this application, by positioning the second busbar 30 and the third busbar 40 at the edge of the windshield region 101 away from the sunroof region 102 (i.e., at the first edge 150 of the glass body 10), and by extending the second heating structure 70 by bending between the second busbar 30 and the third busbar 40, and passing through the visible area (i.e., the third field of view 130 and the fourth field of view 140), the second heating structure 70 can be folded while ensuring that its heating performance meets the operational requirements. This allows the second heating structure 70 to be entirely located within the windshield region 101, enabling it to heat only the windshield region 101. Furthermore, the second busbar 30 and the third busbar 40 can be shielded by the shielding layer 14, preventing them from being exposed. This improves the appearance of the electrically heated glass 100 and provides the driver and passengers with good visibility. In addition, the second heating structure 70 bends and extends between the second busbar 30 and the third busbar 40. This arrangement allows the second heating structure 70 to have a greater range of length adjustment according to the needs of the electrically heated glass 100.

[0091] The second heating structure 70 may include a fourth segment 71, a fifth segment 72, and a sixth segment 73. The fourth segment 71, fifth segment 72, and sixth segment 73 are connected sequentially. One end of the fourth segment 71 is connected to the third busbar 40, and the other end of the fourth segment 71 extends away from the third busbar 40 and connects to one end of the fifth segment 72. The fourth segment 71 may extend along the length of the glass body 10, and a portion of the fourth segment 71 may be located within the third viewing area 130 and the fourth viewing area 140. The fifth segment 72 is bent and connected to the fourth segment 71, and the fifth segment 72 may extend along the width of the glass body 10. The fifth segment 72 is above the boundary line of the third viewing area 130 and the fourth viewing area 140 to avoid obstructing the driver's or passenger's view. The boundary line of the third viewing area 130 and the fourth viewing area 140 is the boundary line of the third viewing area 130 and the fourth viewing area 140 away from the first edge 150 of the glass body 10. Along the length of the glass body 10, the fifth segment 72 and the third busbar 40 are located on opposite sides of the fourth viewing area 140. One end of the sixth segment 73 is connected to the other end of the fifth segment 72, and the other end of the sixth segment 73 is connected to the second busbar 30. The sixth segment 73 can extend along the length of the glass body 10 and cross the third viewing area 130 and the fourth viewing area 140. The fourth segment 71 can be disposed opposite to the sixth segment 73 in the width direction of the glass body 10. Exemplarily, the extension direction of the sixth segment 73 can be parallel to the extension direction of the fourth segment 71.

[0092] The fifth segment 72 is located on the side of the fourth field of vision 140 away from the second busbar 30 and the third busbar 40. It can be understood that the fifth segment 72 is a transverse filament segment in the second heating structure 70. By limiting the length of the fifth segment 72, the total extension length of the second heating structure 70 can be controlled to avoid affecting the driver's and passengers' field of vision.

[0093] There can be multiple second heating structures 70. One end of each second heating structure 70 is electrically connected to the second busbar 30, and the other end is electrically connected to the third busbar 40. Multiple second heating structures 70, together with the second busbar 30 and the third busbar 40, can form multiple second heating circuits C2. That is, the second busbar 30, the third busbar 40, and any one of the second heating structures 70 form a second heating circuit C2. Multiple second heating structures 70 are arranged sequentially and nested between the second busbar 30 and the third busbar 40. At least one first heating structure 60 extends across the visible area along the length of the glass body 10. At least one fourth segment 71 spans the third viewing area 130 and the fourth viewing area 140. At least one sixth segment 73 spans the third viewing area 130 and the fourth viewing area 140. Specifically, a first second heating structure 70 is arranged starting from the side of the second busbar 30 closest to the third busbar 40. The second heating structure 70 is electrically connected to the side of the third busbar 40 closest to the second busbar 30, forming a first second heating circuit C2. This first second heating circuit C2 is the innermost second heating circuit C2. Similarly, wiring is spaced along the width of the glass body 10, with the nth second heating structure 70 arranged at the outermost edge, forming the nth second heating circuit C2. This nth second heating circuit C2 is the outermost second heating circuit C2. The total length of the second heating circuit C2 gradually increases from the innermost edge to the outermost edge. The length of the second heating circuit C2 can be equal to the sum of the lengths of the fourth segment 71, the fifth segment 72, and the sixth segment 73.

[0094] In one possible application scenario, referring to Figure 3, the first busbar 20 is positive, the second busbar 30 is negative, and the third busbar 40 is positive. Current originates from the first busbar 20, passes sequentially through the first segment 61, the second segment 62, and the third segment 63, and returns to the second busbar 30, forming the first heating circuit C1. Current originates from the third busbar 40, passes sequentially through the fourth segment 71, the fifth segment 72, and the sixth segment 73, and returns to the second busbar 30, forming the second heating circuit C2. Subsequently, the first heating structure 60 and the second heating structure 70 generate heat under the action of the heating current, thereby enabling the electrically heated glass 100 to perform functions such as defrosting, defogging, and de-icing.

[0095] In one possible implementation, please refer to FIG7, which is a schematic cross-sectional view of another electrically heated glass 100 provided in an embodiment of this application. The second busbar 30 may include a first sub-busbar 31 and a second sub-busbar 32. The first sub-busbar 31 and the second sub-busbar 32 are spaced apart in the width direction of the glass body 10. The polarity of the first sub-busbar 31 is the same as that of the second sub-busbar 32. The polarity of the first busbar 20 is opposite to that of the first sub-busbar 31, and the polarity of the third busbar 40 is opposite to that of the second sub-busbar 32. For example, the polarity of the first busbar 20 may be positive, the polarity of the first sub-busbar 31 may be negative, the polarity of the second sub-busbar 32 may be negative, and the polarity of the third busbar 40 may be positive. Alternatively, the polarity of the first busbar 20 may be negative, the polarity of the first sub-busbar 31 may be positive, the polarity of the second sub-busbar 32 may be positive, and the polarity of the third busbar 40 may be negative.

[0096] Of course, in other embodiments, the polarity of the first busbar 31 can be opposite to that of the second busbar 32. For example, the polarity of the first busbar 20 can be positive, the polarity of the first busbar 31 can be negative, the polarity of the second busbar 32 can be positive, and the polarity of the third busbar 40 can be negative. Alternatively, the polarity of the first busbar 20 can be negative, the polarity of the first busbar 31 can be positive, the polarity of the second busbar 32 can be negative, and the polarity of the third busbar 40 can be positive.

[0097] In this embodiment, of the first busbar 31 and the second busbar 32, one is electrically connected to the first heating structure 60 and the other is electrically connected to the second heating structure 70.

[0098] For example, one end of the first heating structure 60 is electrically connected to the first busbar 20, and the other end of the first heating structure 60 is electrically connected to the first sub-busbar 31. The first heating structure 60 bends and extends between the first busbar 20 and the first sub-busbar 31, covering a portion of the first viewing area 110 and the second viewing area 120. One end of the second heating structure 70 is electrically connected to the second sub-busbar 32, and the other end of the second heating structure 70 is electrically connected to the third busbar 40. The second heating structure 70 bends and extends between the second sub-busbar 32 and the third busbar 40, covering a portion of the third viewing area 130 and the fourth viewing area 140.

[0099] Referring to Figures 3 and 7, in the embodiments of this application, for the multiple first heating circuits C1 formed by the multiple first heating structures 60, the innermost first heating circuit C1 passes through the central region of the first viewing area 110 and the central region of the second viewing area 120. The length of the innermost first heating circuit C1 is 2d11+d12. The area enclosed by the projection of the outermost first heating circuit C1 onto the glass body 10 covers the second viewing area 120.

[0100] Wherein, d11 is the length of the first segment 61 (or the third segment 63) of the first heating structure 60 in the innermost ring, and d12 is the length of the second segment 62 of the first heating structure 60 in the innermost ring. And so on, the length of the nth heating circuit C1 in the outermost ring is 2dn1 + dn2. Wherein, dn1 is the length of the first segment 61 (or the third segment 63) of the nth heating structure 60 in the outermost ring, and dn2 is the length of the second segment 62 of the nth heating structure 60 in the outermost ring.

[0101] For the second heating circuit C2 formed by the second heating structure 70, the innermost second heating circuit C2 passes through the central region of the third viewing area 130 and the central region of the fourth viewing area 140. The length of the innermost second heating circuit C2 is 2d14+d15. The area enclosed by the projection of the outermost second heating circuit C2 onto the glass body 10 covers the fourth viewing area 140.

[0102] Wherein, d14 is the length of the fourth segment 71 (or the sixth segment 73) of the first second heating structure 70 in the innermost ring, and d15 is the length of the fifth segment 72 of the first second heating structure 70 in the innermost ring. And so on, the length of the nth second heating circuit C2 in the outermost ring is 2dn4 + dn5. Wherein, dn4 is the length of the fourth segment 71 (or the sixth segment 73) of the nth second heating structure 70 in the outermost ring, and dn5 is the length of the fifth segment 72 of the nth second heating structure 70 in the outermost ring.

[0103] Understandably, to better facilitate drivers and passengers and reduce safety hazards, the area to be heated by the electrically heated glass 100 must at least include the visible area. Among these, the first and third viewing areas 110 and 130 are the most important, while the areas in the second and fourth viewing areas 120 and 140 are of secondary importance. The importance of the viewing area is ranked from center to perimeter. The power distribution of the nested heating circuit follows this principle, with higher power in the center for priority defogging or defrosting, and then deferred to the perimeter areas. This heating circuit design effectively reduces losses and saves energy.

[0104] In this embodiment, the length 2d11+d12 of the shortest first heating loop C1 located in the innermost circle is less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50, or the distance S between the first edge 150 and the second edge 160. Extrapolating further, the more first heating loops C1 whose length is less than the distance d3 between the second busbar 30 and the edge busbar 50, or the distance S between the first edge 150 and the second edge 160, the better the heating performance. Optimally, the length 2dn1+dn2 of the first heating loop C1 in the outermost circle is less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50, or the distance S between the first edge 150 and the second edge 160. In other words, the length of all first heating loops C1 can be less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50, or the distance S between the first edge 150 and the second edge 160. The distance d3 between the second busbar 30 and the edge busbar 50 can be equal to the distance between the first busbar 20 and the edge busbar 50, or the distance between the third busbar 40 and the edge busbar 50.

[0105] And / or, the length 2d14+d15 of the shortest second heating loop C2 in the innermost ring is less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50, or the distance S between the first edge 150 and the second edge 160. Furthermore, the more second heating loops C2 whose lengths are less than the distance d3 between the second busbar 30 and the edge busbar 50, or the distance S between the first edge 150 and the second edge 160, the better the heating performance. Optimally, the length 2dn4+dn5 of the second heating loop C2 in the outermost ring is less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50, or the distance S between the first edge 150 and the second edge 160. In other words, the length of all second heating loops C2 can be less than or equal to the distance d3 between the second busbar 30 and the edge busbar 50, or the distance S between the first edge 150 and the second edge 160. The distance d3 between the second busbar 30 and the edge busbar 50 can be equal to the distance between the first busbar 20 and the edge busbar 50, or the distance between the third busbar 40 and the edge busbar 50.

[0106] Understandably, to avoid obstructing the field of vision, at least the first viewing area 110 and the second viewing area 120 and / or the third viewing area 130 and the fourth viewing area 140 in the windshield area 101 should not have any lateral heating structures. Therefore, the position of the lateral heating structures must be above the boundary lines of the second and fourth viewing areas 120 and 140, that is, the position of the second segment 62 of the first heating structure 60 and / or the fifth segment 72 of the second heating structure 70 must be above the boundary lines of the second and / or fourth viewing areas 120 and 140. In this case, the spacing between the lateral heating structures is primarily considered in terms of manufacturing processes. For the first heating structure 60, the interval between two adjacent second segments 62 can be 1 mm to d2 mm. Here, d2 is the length of the second segment 62 of the innermost first heating structure 60 along the width direction of the glass body 10, i.e., d12 as shown in the figure. For the second heating structure 70, the interval between two adjacent fifth segments 72 can be 1 mm to d5 mm. Wherein, d5 is the length along the width direction of the fifth segment 72 of the innermost second heating structure 70 among the multiple second heating structures 70, i.e., d15 in the figure. Furthermore, the outermost heating circuit at least covers the boundary lines of the second viewing area 120 and / or the fourth viewing area 140. This ensures that the glass in all viewing areas can be heated for defogging or defrosting, avoiding safety hazards.

[0107] Understandably, in related technologies, the distance between the upper and lower generatrices of the windshield is relatively short, and the heating structure is designed according to a wavy line. This can increase the resistance of the heating structure by increasing its length, reduce the power, and thus reduce the surface temperature of the electrically heated glass 100, avoiding the generation of hot spots and burning out the heating structure.

[0108] However, in the embodiments of this application, the electrically heated glass 100 is a panoramic windshield, and therefore the distance between the upper and lower busbars of the electrically heated glass 100 is much greater than the distance between the upper and lower busbars of a conventional windshield. In this case, if the heating structure of the electrically heated glass 100 is arranged according to a wavy line, due to the long distance between the upper and lower busbars of the electrically heated glass 100 itself, insufficient power and poor defogging and / or defrosting effects are likely to occur. Specifically, the upper busbar of the electrically heated glass 100 is the busbar near the upper edge of the electrically heated glass 100, that is, the edge busbar 50 near the second edge 160 of the glass body 10. The lower busbar of the electrically heated glass 100 is the busbar near the lower edge of the electrically heated glass 100, that is, the first busbar 20, the second busbar 30, or the third busbar 40 near the first edge 150 of the glass body 10. Therefore, in this technical solution, the heating circuit of the electrically heated glass 100 is designed according to different distances:

[0109] In one possible implementation, please refer to FIG8, which is another cross-sectional structural schematic diagram of the electrically heated glass 100 provided in the embodiment of this application.

[0110] In the multiple first heating circuits C1, when the length of a first heating circuit C1 is less than a preset length, the shape of this first heating structure 60 is designed as a wavy line. When the length of a first heating circuit C1 is greater than the preset length, the shape of this first heating structure 60 is designed as a straight line for heating. When the length of a first heating circuit C1 is equal to the preset length, the shape of this first heating structure 60 is designed as either a straight line or a wavy line.

[0111] The preset length is the length of the glass body 10 (i.e., the distance S between the first edge 150 and the second edge 160) × a first ratio × a second ratio. The first ratio can be the ratio between the length of a conventional windshield and the length of the glass body 10. The length of a conventional windshield can be in the range of 300mm to 1200mm (inclusive of the endpoints 300mm and 1200mm). Further, the length of a conventional windshield can be in the range of 800mm to 1000mm (inclusive of the endpoints 800mm and 1000mm). The length of the glass body 10 can be in the range of 1200mm to 2500mm (inclusive of the endpoints 1200mm and 2500mm). Further, the length of the glass body 10 can be in the range of 1500mm to 1800mm (inclusive of the endpoints 1500mm and 1800mm).

[0112] For example, the ratio of the first ratio can be in the range of 0.2-1 (inclusive of endpoint values ​​0.2 and 1). Further, the ratio of the first ratio can be in the range of 0.44-0.67 (inclusive of endpoint values ​​0.44 and 0.67). The ratio of the second ratio can be in the range of 1.35-1.4.

[0113] In the multiple second heating circuits C2, when the length of one second heating circuit C2 is less than the preset length mentioned above, the shape of this second heating structure 70 is designed as a wavy line. When the length of one second heating circuit C2 is greater than the preset length mentioned above, the shape of this second heating structure 70 is designed as a straight line for heating. When the length of one second heating circuit C2 is equal to the preset length mentioned above, the shape of this second heating structure 70 is designed as either a straight line or a wavy line.

[0114] Referring to conventional windshield heating designs, in this design, when the total length of a first heating circuit C1 and / or a second heating circuit C2 is less than a preset length, the length of the first heating structure 60 and / or the second heating structure 70 is shorter, resulting in higher heating power. Designing the first heating structure 60 and / or the second heating structure 70 as a wavy line can increase the resistance of the heating circuit, reduce power, and lower the glass surface temperature, preventing the heating structure from burning out. When the total length of a first heating circuit C1 and / or a second heating circuit C2 is greater than the preset length, the length of the first heating structure 60 and / or the second heating structure 70 is longer, resulting in lower heating power. In this case, the first heating structure 60 and / or the second heating structure 70 can be designed as a straight line without worrying about excessive power causing the heating structure to burn out. When the total length of a first heating circuit C1 and / or a second heating circuit C2 is equal to the preset length, designing the first heating structure 60 and / or the second heating structure 70 as a straight line or a wavy line achieves the same heating effect; either approach is acceptable.

[0115] In one possible application scenario, referring to Figure 8, the total lengths of the first heating circuit C1 (2d11+d12), the second heating circuit C1 (2d21+d22), and the third heating circuit C1 (2d31+d32) are all less than the preset length. In this case, the first heating structure 60 is designed as a wavy line for heating. The total length of the fourth heating circuit C1 (2d41+d42) is equal to the preset length. In this case, the first heating structure 60 is designed as a straight line for heating, or it can be designed as a wavy line. The total lengths of the fifth heating circuit C1 (2d51+d52), the sixth heating circuit C1 (2d61+d62), and so on, with the total length of the nth heating circuit C1 (2dn1+dn2) all greater than the preset length, in this case, the first heating structure 60 is designed as a straight line for heating.

[0116] The total lengths of the first, second, and third heating circuits C2 (2d14+d15, 2d24+d25, 2d34+d35) are all less than the preset length. In this case, the second heating structure 70 is designed as a wavy line for heating. The total length of the fourth heating circuit C2 (2d44+d45) is equal to the preset length. In this case, the second heating structure 70 is designed as a straight line for heating, or it can be designed as a wavy line. The total lengths of the fifth, sixth, and eleventh heating circuits C2 (2d54+d55, 2d64+d65), and so on, up to the nth heating circuit C2 (2dn4+dn5), are all greater than the preset length. In this case, the second heating structure 70 is designed as a straight line for heating.

[0117] In summary, the electrically heated glass 100, by incorporating a shielding layer 14, allows for heating of the glass without exposing the busbars and heating structure, thus preserving its appearance. Furthermore, the design of the lateral heating structure ensures that heating performance is met without obstructing the driver's view. Additionally, the nested design of the heating circuits within the field of vision area allows for the use of different heating powers in different regions, reducing energy consumption and saving energy.

[0118] The embodiments of this application have been described in detail above. The description of the embodiments above is only for the purpose of helping to understand the method and core idea of ​​this application. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea 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, The electrically heated glass comprises: A glass body, the glass body comprising a windshield area and a sunroof area connected together, the windshield area having a visible area; A first busbar and a second busbar are connected to the glass body and located at the edge of the windshield area away from the sunroof area, and are spaced apart from the visible area. The first busbar and the second busbar are spaced apart in the width direction of the glass body, and the polarity of the first busbar is opposite to that of the second busbar. A shielding layer, wherein the shielding layer is connected to the outer edge of the glass body and is spaced apart from the visible area, the shielding layer covering the first busbar and the second busbar; and Multiple first heating structures are connected to the glass body and located in the windshield area. One end of each first heating structure is electrically connected to the first busbar, and the other end of each first heating structure is electrically connected to the second busbar. The multiple first heating structures are arranged sequentially and nested between the first busbar and the second busbar. At least one first heating structure extends across the visible area along the length direction of the glass body.

2. The electrically heated glass as described in claim 1, characterized in that, The visible area includes a first field of view and a second field of view, the field of view of the second field of view includes the field of view of the first field of view, and each of the first heating structures includes a first segment, a second segment and a third segment. One end of the first segment is connected to the first busbar, and the other end of the first segment is connected to one end of the second segment. The first segment extends along the length of the glass body, and at least one of the first segments crosses the first field of view and the second field of view. The other end of the second segment is connected to one end of the third segment. The second segment extends along the width direction of the glass body. In the length direction of the glass body, the second segment and the first generatrix are located on opposite sides of the second field of view. The other end of the third segment is connected to the second busbar, the third segment extends along the length of the glass body, and at least one of the third segments spans the first field of view and the second field of view.

3. The electrically heated glass as described in claim 2, characterized in that, The spacing between two adjacent second segments is in the range of 1mm-d2mm, where d2 is the length of the second segment of the innermost first heating structure along the width direction of the glass body.

4. The electrically heated glass according to any one of claims 1-3, characterized in that, The first busbar, the second busbar, and any one of the first heating structures form a first heating circuit; Multiple first heating circuits are arranged from the inside out in the order from the center region of the first and second fields of view to the edge region of the first and second fields of view. Among two adjacent first heating circuits, the length of the first heating circuit located in the inner circle is less than the length of the other first heating circuit located in the outer circle.

5. The electrically heated glass as described in claim 4, characterized in that, The area enclosed by the projection of the outermost first heating circuit onto the glass body of the first heating circuit in the plurality of first heating circuits covers the second field of view.

6. The electrically heated glass as described in claim 4, characterized in that, The edge of the windshield area away from the sunroof area is the first edge of the glass body, and the edge of the sunroof area away from the windshield area is the second edge of the glass body. The first edge and the second edge are arranged opposite to each other in the length direction of the glass body. The first busbar and the second busbar are close to the first edge; In the plurality of first heating circuits, the length of the innermost first heating circuit is less than or equal to the distance between the first edge and the second edge, and / or, in the plurality of first heating circuits, the length of the outermost first heating circuit is less than or equal to the distance between the first edge and the second edge.

7. The electrically heated glass as described in claim 6, characterized in that, Along the length of the glass body, the distance between the first generatrix, the second generatrix and the first edge can be 5mm to 30mm; the distance between the edge generatrix and the second edge can be 5mm to 30mm.

8. The electrically heated glass as described in claim 4, characterized in that, When the length of the first heating circuit is greater than the preset length, the shape of the first heating circuit is straight; when the length of the first heating circuit is less than the preset length, the shape of the first heating circuit is wavy. The preset length is the length of the glass body × a first ratio × a second ratio, where the ratio of the first ratio is in the range of 0.2-1 and the ratio of the second ratio is in the range of 1.35-1.

4.

9. The electrically heated glass as described in claim 8, characterized in that, The ratio of the first proportion is in the range of 0.44-0.

67.

10. The electrically heated glass according to any one of claims 1-3 and 5-9, characterized in that, The length of the glass body is in the range of 1200mm-2500mm.

11. The electrically heated glass as described in claim 10, characterized in that, The length of the glass body is in the range of 1500mm-1800mm.

12. The electrically heated glass according to any one of claims 1-3, characterized in that, The electrically heated glass also includes a third busbar, which is connected to the glass body and located at the edge of the windshield area, and is spaced apart from the visible area. The third busbar and the second busbar are spaced apart in the width direction of the glass body, and are located on both sides of the second busbar, respectively. The polarity of the third busbar is opposite to that of the second busbar. The electrically heated glass further includes a second heating structure, which is connected to the glass body and located in the windshield area. It is spaced apart from the first heating structure in the width direction of the glass body. One end of the second heating structure is electrically connected to the second busbar, and the other end of the first heating structure is electrically connected to the third busbar. The first heating structure bends and extends between the second busbar and the third busbar, and crosses the visible area.

13. The electrically heated glass as described in claim 12, characterized in that, The second busbar includes a first sub-busbar and a second sub-busbar. The first sub-busbar and the second sub-busbar are spaced apart in the width direction of the glass body and have the same polarity. One of the first sub-busbar and the second sub-busbar is electrically connected to the first heating structure, and the other is electrically connected to the second heating structure.

14. The electrically heated glass as described in claim 1, characterized in that, The glass body includes an outer glass plate, an inner glass plate, and an intermediate layer, wherein the outer glass plate, the intermediate layer, and the inner glass plate are stacked sequentially. A portion of the outer glass panel, a portion of the inner glass panel, and a portion of the intermediate layer together constitute the windshield area of ​​the glass body, while another portion of the outer glass panel, another portion of the inner glass panel, and another portion of the intermediate layer together constitute the sunroof area of ​​the glass body.

15. The electrically heated glass as described in claim 14, characterized in that, The intermediate layer may include at least one shaded area.

16. The electrically heated glass as described in claim 15, characterized in that, The tinted area may be located at the top of the windshield area; Alternatively, the tinted area may be at the bottom of the windshield area; Alternatively, colored areas may be provided at both the top and bottom of the windshield area, and a transparent area may be provided in the area between the top and bottom of the windshield area.

17. The electrically heated glass as claimed in claim 1, characterized in that, It also includes an edge busbar located in the sunroof glass area and positioned near the second edge of the glass body; The first busbar, the second busbar, and any one of the first heating structures form a first heating circuit; The length of the shortest first heating loop located in the innermost circle is less than or equal to the distance between the second busbar and the edge busbar or the distance between the first edge and the second edge.

18. The electrically heated glass as described in claim 1, characterized in that, It also includes an edge busbar located in the sunroof glass area and positioned near the second edge of the glass body; The electrically heated glass further includes a second heating structure, which is connected to the glass body and located in the windshield area. It is spaced apart from the first heating structure in the width direction of the glass body. One end of the second heating structure is electrically connected to the second busbar, and the other end of the first heating structure is electrically connected to the third busbar. The first heating structure bends and extends between the second busbar and the third busbar, and crosses the visible area. The second busbar, the third busbar, and any one of the second heating structures form a second heating circuit; The length of the shortest second heating loop located in the innermost circle is less than or equal to the distance between the second busbar and the edge busbar or the distance between the first edge and the second edge.

19. The electrically heated glass as claimed in claim 1, characterized in that, The shielding layer may be arranged around the entire outer edge of the glass body, or the shielding layer may be provided on one or more sides of the outer edge of the glass body.

20. A vehicle, characterized in that, The vehicle includes a body panel and electrically heated glass as described in any one of claims 1-19, the electrically heated glass being connected to the body panel.

Images