Automotive window glass and automotive window assembly

Abstract

This application provides a vehicle window glass and a vehicle window assembly. The vehicle window glass includes a glass body, a transparent nanofilm, and a transition layer. The glass body has a non-filmed area and a film-coated area, with a film removal boundary formed at the junction of the film-coated area and the non-filmed area. The transparent nanofilm covers the film-coated area, while the non-filmed area does not have a transparent nanofilm. The transition layer covers the film removal boundary and includes a first contour edge and a second contour edge. The first contour edge is located in the film-coated area, and the second contour edge is located in the non-filmed area. The second contour edge encloses an image acquisition area within the non-filmed area, and the absolute value of the refractive power of the image acquisition area is less than or equal to 150 mdpt. This application can improve the single transition with significant heat absorption differences in the prior art into two or even more slow transitions, thereby reducing the temperature difference between the film-coated area and the image acquisition area, significantly improving the optical transmission quality of the image acquisition area, meeting the requirements of high-pixel cameras.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to vehicle window glass and window assemblies. Background Technology

[0002] With the development of intelligent driving technology for vehicles, the requirements for the clarity of images obtained by cameras through vehicle windows have also increased significantly. This necessitates an improvement in the optical quality of the window glass itself. For window glass equipped with a front camera module (FCM), it typically also has high-value-added functions, such as head-up display, heat insulation, electric heating, and anti-reflection. These functions can be achieved by using vapor deposition technology to form corresponding functional films on the surface of the glass.

[0003] Some functional films can interfere with cameras, degrading the quality of images captured. Therefore, it's necessary to remove these films from the image acquisition area of ​​the car window glass, meaning the area covered by the functional film is the coated area. However, due to the different heat absorption properties of the functional film and the car window glass, the heat absorbed by the coated area differs from that absorbed by the image acquisition area during the high-temperature bending process (at least 560°C). This results in a significant temperature difference between the two areas, causing dynamic differences during bending and leading to optical distortion or aberrations at the interface between the coated and image acquisition areas. This can result in a refractive power in the image acquisition area exceeding 400 mdpt, causing the image quality, clarity, and accuracy acquired by the camera to fail to meet requirements. Summary of the Invention

[0004] The purpose of this application is to provide a vehicle window glass and a vehicle window assembly that can reduce the temperature difference between the coated area and the image acquisition area of ​​the vehicle window glass during the bending and forming process, thereby reducing defects such as optical distortion or optical aberration in the image acquisition area and improving the optical quality of the image acquisition area.

[0005] In a first aspect, this application provides a vehicle window glass, including a glass body, a transparent nanofilm, and a transition layer;

[0006] The glass body has a film-free area and a coated area, and the connection between the coated area and the film-free area forms a film removal boundary.

[0007] The transparent nanofilm covers the coated area, and the transparent nanofilm is not disposed in the uncoated area;

[0008] The transition layer covers the film removal boundary, and the transition layer includes a first contour edge and a second contour edge, wherein the first contour edge is located in the film-coated area and the second contour edge is located in the film-free area.

[0009] The second contour edge surrounds the membrane-free area to form an image acquisition area, wherein the absolute value of the refractive power of the image acquisition area is less than or equal to 150 mdpt.

[0010] Wherein, the distance between the first contour edge and the film removal boundary is greater than or equal to 10 mm, and the distance between the second contour edge and the film removal boundary is greater than or equal to 10 mm.

[0011] Wherein, the distance between the first contour edge and the film removal boundary is 15mm to 50mm; and / or, the distance between the second contour edge and the film removal boundary is 15mm to 50mm.

[0012] The glass body is a single-layer reinforced glass, which has an outer surface and an inner surface, and the transparent nanofilm is disposed on the inner surface.

[0013] The glass body is laminated glass, which includes an outer glass plate, an adhesive layer and an inner glass plate. The outer glass plate has a first surface and a second surface opposite to each other, and the inner glass plate has a third surface and a fourth surface opposite to each other. The adhesive layer connects the second surface and the third surface, and the transparent nanofilm is disposed on the second surface, the third surface or the fourth surface.

[0014] The transparent nanofilm is disposed on the fourth surface, and the coating area has a first reflectivity RL1 for P-polarized light with wavelengths of 380nm to 780nm incident at an incident angle of 65°, where RL1 ≥ 15%.

[0015] The inner glass plate is a curved glass plate formed by bending a flat glass plate at a high temperature of at least 560°C, and both the transparent nanofilm and the transition layer are formed by bending at a high temperature of at least 560°C.

[0016] The inner glass plate is colored glass, which has an absorption rate of 10% to 30% for infrared rays with wavelengths of 4000nm to 5000nm.

[0017] The inner glass plate is transparent glass, and the transparent glass has an absorption rate of less than or equal to 5% for infrared rays with wavelengths of 4000nm to 5000nm.

[0018] The transparent nanofilm has a first absorption rate A1 for infrared light with a wavelength of 4000nm to 5000nm, where A1 is greater than 5%.

[0019] The transition layer has a second absorption rate A2 for infrared radiation with a wavelength of 4000nm to 5000nm, where A2 > A1.

[0020] Among them, A2-A1≥5%, or A2-A1≥8%, or A2-A1≥10%, or A2-A1≥15%, or A2-A1≥20%, or A2-A1≥25%.

[0021] The image acquisition area has a transmittance of at least 60% (TL) for visible light with wavelengths of 440nm to 700nm incident at a 65° incident angle. (440-700) .

[0022] The transmittance TL of the image acquisition area for red light with a wavelength of 600nm to 700nm incident at an incident angle of 65° is specified. (600-700) The transmittance TL of the image acquisition area for visible light with wavelengths of 440nm to 700nm incident at an incident angle of 65°. (440-700) The ratio between them is greater than or equal to 0.8.

[0023] The ratio of the transmittance Tp of the image acquisition area for P-polarized light with wavelengths of 440nm to 700nm incident at a 65° incident angle to the transmittance Ts of the image acquisition area for S-polarized light with wavelengths of 440nm to 700nm incident at a 65° incident angle is greater than or equal to 1.45.

[0024] The material of the transition layer is selected from at least one of black ceramic ink, brown ceramic ink, black ultraviolet ink, or brown ultraviolet ink.

[0025] The transparent nanofilm includes at least one stacked structure consisting of a high refractive index layer and a low refractive index layer. In each stacked structure, the high refractive index layer is closer to the glass body than the low refractive index layer. The refractive index of the high refractive index layer is greater than or equal to 1.8, and the refractive index of the low refractive index layer is less than 1.8.

[0026] Secondly, this application provides a vehicle window assembly, including an optical sensor and a vehicle window glass as described above, wherein the optical sensor is used to emit and / or receive detection light rays that pass through the image acquisition area.

[0027] The window assembly also includes a projection device that emits projection light onto the coating area, the projection light containing at least 80% P-polarized light.

[0028] The optical sensor is a visible light camera, which is selected from at least one of a standard camera, a narrow-angle camera, and a wide-angle camera. The horizontal field of view (HFOV) of the standard camera is 40°≤HFOV≤90°, the horizontal field of view (HFOV) of the narrow-angle camera is HFOV<40°, and the horizontal field of view (HFOV) of the wide-angle camera is 90°<HFOV≤180°.

[0029] The window glass and window assembly provided in this application can improve the single transition with significant heat absorption differences in the prior art into two or even more slow transitions, thereby reducing the temperature difference between the coating area and the image acquisition area during the high-temperature bending and forming process of at least 560°C. This significantly improves the optical transmission quality of the image acquisition area, meeting the requirement that the absolute value of the refractive power of the image acquisition area is less than or equal to 150 mdpt, thus meeting the requirements for the use of high-pixel cameras. Attached Figure Description

[0030] Figure 1 This is a structural diagram of the vehicle provided in this application;

[0031] Figure 2 A schematic diagram of one embodiment of the window assembly provided in this application;

[0032] Figure 3 A schematic diagram of another embodiment of the window assembly provided in this application;

[0033] Figure 4 A frontal perspective view of a vehicle window glass as seen from inside the vehicle;

[0034] Figure 5 A partial cross-sectional schematic diagram of one embodiment of the vehicle window glass provided in this application;

[0035] Figure 6 A partial cross-sectional schematic diagram of another embodiment of the vehicle window glass provided in this application;

[0036] Figure 7 Partial cross-sectional schematic diagrams of two other embodiments of the vehicle window glass provided in this application;

[0037] Figure 8 Partial cross-sectional schematic diagrams of three other embodiments of the vehicle window glass provided in this application;

[0038] Figure 9 Partial cross-sectional schematic diagrams of four other embodiments of the vehicle window glass provided in this application;

[0039] Figure 10 Partial cross-sectional schematic diagrams of five other embodiments of the vehicle window glass provided in this application;

[0040] Figure 11 A schematic diagram of the structure of a vehicle window glass with a heat insulation layer or an electric heating layer provided for this application;

[0041] Figure 12 A structural schematic diagram of a vehicle window assembly with a projection device provided for this application;

[0042] Figure 13 Absorption spectrum curves of the four test samples provided for this application. Detailed Implementation

[0043] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0044] In this application, the terms "first," "second," "third," and "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," "third," and "fourth," etc., may explicitly or implicitly include one or more of that feature. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, "multiple" in this application refers to two or more.

[0045] Please see Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application. Figure 2 This is a structural schematic diagram of one embodiment of the window assembly provided in this application. Figure 2 The car windows are made of single-pane tempered glass. Figure 3 A schematic diagram of another embodiment of the window assembly provided in this application. Figure 3 The car windows in the vehicle are made of laminated glass (size 200). It should be noted that... Figure 2 and Figure 3 This is a brief illustration of the position of the optical sensor 300 corresponding to the window glass 200.

[0046] This application provides a vehicle 1000. Depending on its purpose, the vehicle 1000 can be categorized as a sedan, bus, or truck. Based on its power source, the vehicle 1000 can be classified as a gasoline-powered vehicle, a pure electric vehicle, a hybrid electric vehicle, or a fuel cell vehicle. In this embodiment, as... Figure 1 As shown, vehicle 1000 is illustrated using a sedan as an example.

[0047] Vehicle 1000 includes a vehicle body 100 and a window assembly, which includes a window glass 200 and an optical sensor 300. The window glass 200 is installed at an opening in the vehicle body 100. The window glass 200 has an image acquisition area 201. The optical sensor 300 is disposed inside the vehicle 1000 and is used to emit and / or receive detection light. The optical sensor 300 is positioned corresponding to the image acquisition area 201, and the detection light passes through the image acquisition area 201, thereby enabling the acquisition of external environmental data of the vehicle 1000.

[0048] The vehicle window glass 200 includes a glass body 210 and a transparent nanofilm 220. The transparent nanofilm 220 is connected to the glass body 210. The transparent nanofilm 220 is used to provide the vehicle window glass with functions such as head-up display (HUD), heat insulation, visible light anti-reflection, and near-infrared anti-reflection. The transparent nanofilm 220 can be formed by chemical vapor deposition (CVD) or physical vapor deposition (PVD). Preferably, the transparent nanofilm 220 is formed by magnetron sputtering.

[0049] The window glass 200 can be, but is not limited to, the windshield, side windows, rear windshield, and sunroof of the vehicle 1000.

[0050] exist Figure 2In this design, the glass body 210 is a single-layer tempered glass, which has an outer surface 2101 facing outwards and an inner surface 2102 facing inwards. A transparent nanofilm 220 is attached to the inner surface 2102. The outer surface 2101 of this single-layer tempered glass is the outer surface of the window glass 200, and the inner surface 2102 of this single-layer tempered glass is the inner surface of the window glass 200. This single-layer tempered glass is typically curved physically tempered glass, but it can also be curved chemically tempered glass, or even curved PC glass. The thickness of this single-layer tempered glass is 2.0mm to 8.0mm (including the endpoint values ​​of 2.0mm and 8.0mm), and the visible light transmittance is 70% to 95% (including the endpoint values ​​of 70% and 95%). This single-layer tempered glass can be used as side window glass, rear windshield glass, or sunroof glass, and can also be used as A-pillar decorative glass, B-pillar decorative glass, C-pillar decorative glass, or D-pillar decorative glass, etc. The single-layer tempered glass is either transparent or tinted glass. The total iron content (calculated as Fe2O3) of the transparent glass is less than or equal to 0.1%, even less than or equal to 0.05%, and further less than or equal to 0.01%. The visible light transmittance of the transparent glass is 80% to 95% (including the endpoint values ​​of 80% and 95%). The total iron content (calculated as Fe2O3) of the tinted glass is 0.1% to 0.8%, preferably 0.1% to 0.5%, and the visible light transmittance of the tinted glass is 80% to 90% (including the endpoint values ​​of 80% and 90%).

[0051] exist Figure 3 In this design, the glass body 210 is laminated glass, comprising an outer glass panel 211, an adhesive layer 212, and an inner glass panel 213. The outer glass panel 211 has opposing first surfaces 2111 and second surfaces 2112, and the inner glass panel 213 has opposing third surfaces 2131 and fourth surfaces 2132. The adhesive layer 212 connects the second surface 2112 and the third surface 2131. The transparent nanofilm 220 is disposed on the second surface 2112, the third surface 2131, or the fourth surface 2132. The first surface 2111 of this laminated glass is the outer surface of the vehicle window glass 200, and the fourth surface 2132 of this laminated glass is the inner surface of the vehicle window glass 200.

[0052] The outer glass plate 211 is made of transparent or tinted glass, with a thickness of 0.7 mm to 4.0 mm (including the endpoint values ​​of 0.7 mm and 4.0 mm), and a visible light transmittance greater than or equal to 80%. The inner glass plate 213 is also made of transparent or tinted glass, with a thickness of 0.7 mm to 4.0 mm (including the endpoint values ​​of 0.7 mm and 4.0 mm), and a visible light transmittance greater than or equal to 80%. The total iron content (calculated as Fe2O3) of the transparent glass is less than or equal to 0.1%, even less than or equal to 0.05%, and further less than or equal to 0.01%, and the visible light transmittance of the transparent glass is 80% to 95%; the total iron content (calculated as Fe2O3) of the tinted glass is 0.1% to 0.8%, preferably 0.1% to 0.5%, and the visible light transmittance of the tinted glass is 80% to 90%. For example, the outer glass plate 211 can be a 2.1 mm thick transparent glass with a visible light transmittance of 89%, and the inner glass plate 213 can be a 1.6 mm thick green glass with a visible light transmittance of 83%, or a 2.1 mm thick green glass with a visible light transmittance of 80%.

[0053] The adhesive layer 212 is a transparent or colored thermoplastic polymer film, and its thickness is 0.38 mm to 2.28 mm (inclusive of the endpoint values ​​of 0.38 mm and 2.28 mm). For example, the thickness of the adhesive layer 212 can be, but is not limited to, 0.38 mm, 0.76 mm, 1.14 mm, 1.52 mm, 1.9 mm, 2.28 mm, or other values ​​between 0.38 mm and 2.28 mm. The material of the thermoplastic polymer film can be selected from at least one of polyvinyl butyral (PVB), polyurethane (PU), ethylene-vinyl acetate copolymer (EVA), and ionic polymer (Sentry Glas Plus, SGP). When the adhesive layer 212 is a transparent thermoplastic polymer, the visible light transmittance of the transparent thermoplastic polymer is greater than or equal to 80%. For example, the visible light transmittance of the adhesive layer 212 can be, but is not limited to, 80%, 85%, 90%, or 95%. When the adhesive layer 212 is a colored thermoplastic polymer film, the visible light transmittance of the colored thermoplastic polymer film is greater than or equal to 80%. For example, the visible light transmittance of the adhesive layer 212 can be, but is not limited to, 80%, 85%, or 90%. The colored thermoplastic polymer film can be a gray thermoplastic polymer film, a green thermoplastic polymer film, or a blue thermoplastic polymer film. Exemplarily, the adhesive layer 212 can be a single-layer structure or a multi-layer structure. Examples of multi-layer structures include double-layer, triple-layer, quadruple-layer, and five-layer structures. The adhesive layer 212 may also have other functions, such as setting at least one colored area as a shaded area to reduce the interference of sunlight on the human eye, or adding an infrared absorber to have sun protection or heat insulation functions, or adding an ultraviolet absorber to have ultraviolet protection functions, or having a higher plasticizer content in at least one layer of the multi-layer structure to have sound insulation functions.

[0054] In this embodiment, the windshield of vehicle 1000 is used as an example to illustrate the window glass 200. The glass body 210 is laminated glass, and the transparent nanofilm 220 is disposed on the fourth surface 2132.

[0055] For ease of description, the width direction of the window glass 200 after it is installed on the vehicle 1000 is defined as the X-axis, the height direction as the Y-axis, and the thickness direction as the Z-axis. The X-axis, Y-axis, and Z-axis are mutually perpendicular. Correspondingly, when viewing the window glass 200 from inside the vehicle 1000, the direction from the left to the right of the window glass 200 is defined as the positive X-axis, the direction from the bottom to the top of the window glass 200 as the positive Y-axis, and the direction from the inside to the outside of the vehicle 1000 as the positive Z-axis. In the description of this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on... Figure 1 , Figure 2 or Figure 3 The orientation or positional relationship of the car window glass 200 shown.

[0056] The optical sensor 300 can be specifically exemplified by a visible light camera, near-infrared camera, lidar, thermal imager, etc., used for image acquisition, ranging, and positioning, thereby contributing to the assisted driving or autonomous driving of the vehicle 1000. Specifically, the optical sensor 300 can be fixedly installed on the inner surface of the window glass 200 by means of brackets, adsorption, adhesion, etc. The detection light emitted by the optical sensor 300 passes through the image acquisition area 201 of the window glass 200 and propagates to the external environment of the vehicle 1000. Alternatively, detection light emitted or reflected by objects located outside the vehicle 1000 passes through the image acquisition area 201 of the window glass 200 and is received by the optical sensor 300, thereby enabling the optical sensor 300 to collect information about the external environment of the vehicle 1000.

[0057] For example, the optical sensor 300 is a visible light camera. One to four visible light cameras are typically installed on the vehicle window glass 200. These visible light cameras can include at least one of a narrow-angle camera, a standard camera, and a wide-angle camera. The visible light cameras are used to acquire image data of the external driving environment of the vehicle 1000. The field of view (FOV) of a visible light camera is the maximum field of view range when acquiring image data, and can be divided into the horizontal field of view (HFOV) and the vertical field of view (VFOV). Specifically, the horizontal field of view (HFOV) of a standard camera is 40° ≤ HFOV ≤ 90°, and the maximum detection distance is less than or equal to 200 meters. Standard cameras can be used as the main information acquisition device in Level 2 or higher Advanced Driving Assistance Systems (ADAS) or Autonomous Driving Systems (ADS). The horizontal field of view (HFOV) of a narrow-angle camera is HFOV < 40°, and the maximum detection distance is less than or equal to 300 meters. Narrow-angle cameras are primarily used to identify distant objects and can be used to identify targets such as traffic lights and pedestrians. Wide-angle cameras have a horizontal field of view (HFOV) of 90° < HFOV ≤ 180°, and a maximum detection distance of 80 meters or less. Wide-angle cameras are mainly used to identify close-range objects and can be used in urban road conditions and low-speed driving scenarios.

[0058] Visible light cameras can be low-resolution cameras with less than 2 megapixels, such as 800,000-pixel or 1-megapixel cameras. Visible light cameras can also be high-resolution cameras with 2 megapixels or more, more preferably 5 megapixels or more, such as 2-megapixel, 5-megapixel, 8-megapixel, 12-megapixel, 20-megapixel, 50-megapixel, 100-megapixel, or 200-megapixel cameras. High-resolution cameras also have a longer detection range and a larger horizontal field of view (HFOV). High-resolution cameras also feature higher dynamic range (HDR) and better LED flicker cancellation (LFM).

[0059] To meet the requirements of high-resolution cameras, the image acquisition area 201 preferably has a transmittance TL of at least 60% for visible light with wavelengths of 440nm to 700nm (inclusive) incident at a 65° angle of incidence.(440-700) More preferably, it has a transmittance of at least 65%, even more preferably, it has a transmittance of at least 70%, even more preferably, it has a transmittance of at least 75%, even more preferably, it has a transmittance of at least 80%, and even more preferably, it has a transmittance of at least 85%. TL (440-700) The transmittance of visible light with wavelengths of 440nm to 700nm incident at an incident angle of 65° in the image acquisition area 201.

[0060] To meet the requirements of high-pixel cameras, the transmittance TL of red light with wavelengths of 600nm to 700nm (including the endpoints 600nm and 700nm) incident at a 65° incident angle in the image acquisition area 201 is also preferred. (600-700) The transmittance TL of visible light with wavelengths of 440nm to 700nm incident at an incident angle of 65° in the image acquisition area 201 (440-700) The ratio between them is greater than or equal to 0.8, i.e., TL (600-700) / TL (440-700) ≥0.8, specifically examples include 0.80, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, etc., with TL being more preferred. (600-700) / TL (440-700) ≥0.83, further optimization of TL (600-700) / TL (440-700) ≥0.85. TL (600-700) The transmittance of red light with wavelengths of 600nm to 700nm incident at an incident angle of 65° in the image acquisition area 201.

[0061] To meet the requirements of high-pixel cameras, it is preferable that the ratio of the transmittance Tp of P-polarized light with wavelengths of 440nm to 700nm incident at a 65° angle to the transmittance Ts of S-polarized light with wavelengths of 440nm to 700nm incident at a 65° angle in the image acquisition area 201 is greater than or equal to 1.45, i.e., Tp / Ts ≥ 1.45. Specific examples include 1.45, 1.46, and 1. The values ​​are 0.47, 1.48, 1.49, 1.50, 1.51, 1.52, 1.53, 1.54, 1.55, 1.56, 1.57, 1.58, 1.59, 1.60, 1.65, 1.68, 1.70, 1.75, etc., with Tp / Ts ≥ 1.50 being more preferred, Tp / Ts ≥ 1.55 being even more preferred, Tp / Ts ≥ 1.60 being even more preferred, and Tp / Ts ≥ 1.65 being even more preferred.

[0062] Please see Figure 4 , Figure 4 This is a frontal perspective view of a vehicle window glass as seen from inside the vehicle.

[0063] The vehicle window glass 200 has a main viewing area 202 and a circumferentially arranged shielding area 203 surrounding the main viewing area 202. The visible light transmittance of the main viewing area 202 is greater than or equal to 70%, which facilitates the observation of the external environment by occupants of the vehicle. The visible light transmittance of the shielding area 203 is less than or equal to 5%, which helps to provide shielding, protection, and enhance the overall aesthetics. Preferably, the visible light transmittance of the shielding area 203 is less than or equal to 3%, more preferably less than or equal to 1%, further less than or equal to 0.5%, or even almost equal to 0, i.e., opaque. Specifically, the shielding area 203 may be formed by a shielding layer 240, which is disposed on at least one of the second surface 2112, the third surface 2131, and the fourth surface 2132. The material of the shielding layer 240 can be ceramic ink or ultraviolet ink. The ceramic ink or ultraviolet ink is printed onto the second surface 2112, the third surface 2131, and / or the fourth surface 2132 using processes such as screen printing or inkjet printing. After curing or high-temperature sintering, the shielding layer 240 is formed. The thickness of the shielding layer 240 is 5μm to 40μm (including the endpoint values ​​of 5μm and 40μm). It should be noted that the shielding layer 240 covers the shielding area 203. Figure 4 The area enclosed by the solid frame 2031 is the main viewing area 202, and the area between the solid frame 2031 and the outline of the window glass 200 is the shading area 203.

[0064] The glass body 210 has a coated area 204 and a non-coated area 205, and a film removal boundary 2051 is formed at the junction of the coated area 204 and the non-coated area 205. A transparent nanofilm 220 covers the coated area 204 and is connected to the window glass 200 by processes such as magnetron sputtering, and forms the coated area 204 on the window glass 200. The non-coated area 205 can be formed in the coated area 204 by film removal methods such as pre-masking film removal, chemical etching film removal, laser film removal or mechanical friction film removal. The transparent nanofilm 220 is not provided in the non-coated area 205. It should be noted that the dashed frame 2041 represents the outline of the coating area 204, and the area enclosed by the dashed frame 2041 is the coating area 204. The dashed frame 2041 is located within the masking area 203, allowing the masking layer 240 to mask the outline of the coating area 204. The film removal boundary 2051 is also located within the masking area 203. The image acquisition area 201 is located within the uncoated area 205.

[0065] This application provides a vehicle window glass 200. According to the manufacturing process of vehicle glass, the vehicle window glass 200 typically has a curved shape, for example, a curved glass sheet formed by bending a flat glass plate at a high temperature of at least 560°C. A transparent nanofilm 220 is typically applied to the flat glass plate before undergoing the high-temperature bending process at at least 560°C, and then undergoes the high-temperature bending process at at least 560°C together with the flat glass plate. This simplifies the manufacturing process of the vehicle window glass 200 and improves the mechanical and optical properties of the transparent nanofilm 220. Specifically, the transparent nanofilm 220 is disposed on the fourth surface 2132, and the inner glass plate 213 is a curved glass plate formed by bending a flat glass plate at a high temperature of at least 560°C, with the transparent nanofilm 220 undergoing the high-temperature bending process at at least 560°C.

[0066] In some embodiments, the inner glass plate 213 is transparent glass, which has an absorption rate of less than or equal to 5% for infrared radiation with wavelengths of 4000nm to 5000nm (inclusive of the endpoints 4000nm and 5000nm). In other embodiments, the inner glass plate 213 is tinted glass, which has an absorption rate of 10% to 30% (inclusive of the endpoints 10% and 30%) for infrared radiation with wavelengths of 4000nm to 5000nm. The transparent nanofilm 220 has a first absorption rate A1 for infrared radiation with wavelengths of 4000nm to 5000nm, where A1 is greater than 5%, and specific examples include 6%, 8%, 10%, 12%, 15%, 18%, 20%, 22%, 24%, etc.; preferably, the first absorption rate A1 is 10% to 20% (inclusive of the endpoints 10% and 20%). Because the transparent nanofilm 220 and the glass material used in the glass body 210 have different absorption rates for infrared rays with wavelengths of 4000nm to 5000nm, a large temperature difference exists between the coating area 204 and the image acquisition area 201 during the high-temperature bending and forming process at at least 560°C. This causes defects such as optical distortion or light aberration in the image acquisition area 201. To reduce or even eliminate these defects, this application also provides a transition layer 230. The transition layer 230 covers the film removal boundary 2051. The transition layer 230 includes a first contour edge 2301 and a second contour edge 2302. The first contour edge 2301 is located in the coating area 204, and the second contour edge 2302 is located in the film-free area 205. The second contour edge 2302 surrounds the film-free area 205 to form an image acquisition area 201. That is, the transition layer 230 spans the coating area 204 and the film-free area 205. A part of the transition layer 230 covers the coating area 204, and another part of the transition layer 230 covers the film-free area 205. This application, by setting a transition layer 230 spanning the coated area 204 and the uncoated area 205, can improve the single transition with significant heat absorption differences in the prior art into two or even more slow transitions. This reduces the temperature difference between the coated area 204 and the image acquisition area 201 during the high-temperature bending and forming process at at least 560°C, thereby significantly improving the optical transmission quality of the image acquisition area 201 and meeting the requirement that the absolute value of the refractive power of the image acquisition area 201 is less than or equal to 150 mdpt, thus meeting the requirements for the use of high-pixel cameras. The method for measuring the first absorptivity A1 is as follows: Prepare a 2.1 mm thick transparent glass with a visible light transmittance of 89%, and measure its absorptivity A10 for infrared rays with wavelengths of 4000 nm to 5000 nm; prepare another 2.1 mm thick transparent glass with the same absorptivity and a visible light transmittance of 89%, deposit a transparent nanofilm 220 on its surface, and measure its absorptivity A11 for infrared rays with wavelengths of 4000 nm to 5000 nm; the first absorptivity A1 = A11 - A10.

[0067] The second contour edge 2302 encloses the image acquisition area 201 within the non-film area 205. That is, the area enclosed by the second contour edge 2302 within the non-film area 205 is equal to or slightly larger than the area of ​​the image acquisition area 201. This can avoid the image acquisition area 201 being too small and affecting the field of view of the optical sensor 300, and can also avoid excessive stray light from outside the vehicle entering the optical sensor 300 due to an excessively large area, resulting in poor image quality. Preferably, the second contour edge 2302 is 0 to 5 mm larger than the contour of the image acquisition area 201 (including the endpoint values ​​of 0 mm and 5 mm). For example, it can be 0 mm (equal), 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm.

[0068] The transition layer 230 has a second absorption rate A2 for infrared light with wavelengths of 4000nm to 5000nm, where A2 > A1. This facilitates multiple slow transitions to create heat absorption differences and further reduces the temperature difference between the center of the image acquisition area 201 and the coating area 204. Preferably, A2-A1 ≥ 5%, or A2-A1 ≥ 8%, or A2-A1 ≥ 10%, or A2-A1 ≥ 15%, or A2-A1 ≥ 20%, or A2-A1 ≥ 25%. The method for measuring the second absorptivity A2 is as follows: Prepare a piece of transparent glass with a thickness of 2.1 mm and a visible light transmittance of 89%, and measure its absorptivity A10 for infrared rays with a wavelength of 4000 nm to 5000 nm; prepare another piece of transparent glass with the same absorptivity of 2.1 mm and a visible light transmittance of 89%, coat its surface with a transition layer 230, and measure its absorptivity A12 for infrared rays with a wavelength of 4000 nm to 5000 nm; the second absorptivity A2 = A12 - A10.

[0069] The transition layer 230 can be made of the same material as or a different material than the shielding layer 240. The transition layer 230 can be applied to the transparent nanofilm 220 and the film-free region 205 after the transparent nanofilm 220 is deposited on a flat glass plate to form the film-free region 205, using processes such as screen printing or inkjet printing. Alternatively, the transition layer 230 can be first applied to the corresponding area of ​​the flat glass plate using processes such as screen printing or inkjet printing, and then the transparent nanofilm 220 is deposited on the flat glass plate to form the film-free region 205. The material of the transition layer 230 can be selected from at least one of black ceramic ink, brown ceramic ink, black ultraviolet ink, or brown ultraviolet ink. The thickness of the transition layer 230 is 5 μm to 40 μm, preferably less than or equal to the thickness of the shielding layer 240. In some embodiments, the transition layer 230 and the shielding layer 240 have the same material and thickness, which facilitates formation in a single printing process and saves process steps. In other embodiments, the transition layer 230 and the shielding layer 240 are made of different materials and have different thicknesses to better meet the diverse needs of more product designs. In still other embodiments, the transition layer 230 and the shielding layer 240 are made of the same material but have different thicknesses, or they are made of different materials but have the same thickness, to better meet the diverse needs of more product designs.

[0070] exist Figure 4 In the image acquisition area 201, the first contour edge 2301 is located in the coating area 204, and the second contour edge 2302 is located in the uncoated area 205. The distance between the first contour edge 2301 and the coating removal boundary 2051 is greater than or equal to 10 mm, and the distance between the second contour edge 2302 and the coating removal boundary 2051 is greater than or equal to 10 mm, so as to meet the requirement that the absolute value of the refractive power of the image acquisition area 201 is less than or equal to 150 mdpt. Preferably, the absolute value of the refractive power of the image acquisition area 201 is less than or equal to 125 mdpt, and more preferably, the absolute value of the refractive power of the image acquisition area 201 is less than or equal to 100 mdpt. The distance between the first contour edge 2301 and the film removal boundary 2051 can be, for example, 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, etc., preferably 15mm to 50mm; the distance between the second contour edge 2302 and the film removal boundary 2051 can be, for example, 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, etc., preferably 15mm to 50mm (including the endpoint values ​​of 15mm and 50mm).

[0071] Please see Figure 5 , Figure 5 This is a partial cross-sectional schematic diagram of one embodiment of the vehicle window glass provided in this application. A shielding layer 240 is directly printed on the second surface 2112, and a transparent nanofilm 220 is directly deposited on the fourth surface 2132. A portion of the transition layer 230 covers the transparent nanofilm 220 in the coated area 204, and another portion covers the fourth surface 2132 in the uncoated area 205. The transition layer 230 and the shielding layer 240 partially overlap in the thickness direction of the vehicle window glass 200. The first contour edge 2301 of the transition layer 230 is located in the coated area 204, and the second contour edge 2302 is located in the uncoated area 205. The second contour edge 2302 encloses an image acquisition area 201 within the uncoated area 205.

[0072] Please see Figure 6 , Figure 6 This is a partial cross-sectional schematic diagram of another embodiment of the vehicle window glass provided in this application. The shielding layer 240 is directly printed on the second surface 2112. A portion of the transparent nanofilm 220 is directly deposited on the fourth surface 2132, and another portion of the transparent nanofilm 220 is directly deposited on the transition layer 230. A portion of the transition layer 230 covers the fourth surface 2132 of the coated area 204, and another portion of the transition layer 230 covers the fourth surface 2132 in the uncoated area 205. The transition layer 230 and the shielding layer 240 partially overlap in the thickness direction of the vehicle window glass 200. The first contour edge 2301 of the transition layer 230 is located in the coated area 204, and the second contour edge 2302 is located in the uncoated area 205. The second contour edge 2302 surrounds the image acquisition area 201 in the uncoated area 205.

[0073] Please see Figure 7 , Figure 7 This is a partial cross-sectional schematic diagram of two other embodiments of the vehicle window glass provided in this application. A shielding layer 240 is directly printed on the second surface 2112, a transparent nanofilm 220 is directly deposited on the fourth surface 2132, a portion of a transition layer 230 covers the transparent nanofilm 220 of the coated area 204, and another portion of the transition layer 230 covers the fourth surface 2132 within the uncoated area 205. The transition layer 230 and the shielding layer 240 partially overlap in the thickness direction of the vehicle window glass 200. A first contour edge 2301 of the transition layer 230 is located in the coated area 204, and a second contour edge 2302 is located in the uncoated area 205. The second contour edge 2302 encloses an image acquisition area 201 within the uncoated area 205. At least a portion of the first contour edge 2301 is flush with the shielding layer 240 in the thickness direction of the vehicle window glass 200.

[0074] Please see Figure 8 , Figure 8This is a partial cross-sectional schematic diagram of three other embodiments of the vehicle window glass provided in this application. The shielding layer 240 is directly printed on the second surface 2112. A portion of the transparent nanofilm 220 is directly deposited on the fourth surface 2132, and another portion of the transparent nanofilm 220 is directly deposited on the transition layer 230. A portion of the transition layer 230 covers the fourth surface 2132 of the coated area 204, and another portion of the transition layer 230 covers the fourth surface 2132 within the uncoated area 205. The transition layer 230 and the shielding layer 240 partially overlap in the thickness direction of the vehicle window glass 200. The first contour edge 2301 of the transition layer 230 is located in the coated area 204, and the second contour edge 2302 is located in the uncoated area 205. The second contour edge 2302 encloses an image acquisition area 201 within the uncoated area 205. At least a portion of the first contour edge 2301 is flush with the shielding layer 240 in the thickness direction of the vehicle window glass 200.

[0075] Please see Figure 9 , Figure 9 This is a partial cross-sectional schematic diagram of four other embodiments of the vehicle window glass provided in this application. The shielding layer 240 is directly printed on the second surface 2112 and the fourth surface 2132. A portion of the transparent nanofilm 220 is directly deposited on the fourth surface 2132, and another portion of the transparent nanofilm 220 is directly deposited on the shielding layer 240 on the fourth surface 2132. A portion of the transition layer 230 covers the transparent nanofilm 220 of the coated area 204, and another portion of the transition layer 230 covers the fourth surface 2132 within the uncoated area 205. The transition layer 230 and the shielding layer 240 on the second surface 2112 partially overlap in the thickness direction of the vehicle window glass 200. The first contour edge 2301 of the transition layer 230 is located in the coated area 204, and the second contour edge 2302 is located in the uncoated area 205. The second contour edge 2302 encloses an image acquisition area 201 within the uncoated area 205.

[0076] Please see Figure 10 , Figure 10Partial cross-sectional schematic diagrams of five other embodiments of the vehicle window glass provided in this application. A shielding layer 240 is directly printed on a transparent nanofilm 220 on the second surface 2112 and the fourth surface 2132; a portion of the transparent nanofilm 220 is directly deposited on the fourth surface 2132, and another portion of the transparent nanofilm 220 is directly deposited on a transition layer 230. A portion of the transition layer 230 covers the fourth surface 2132 of the coated area 204, and another portion of the transition layer 230 covers the fourth surface 2132 within the uncoated area 205. The transition layer 230 and the shielding layer 240 on the second surface 2112 partially overlap in the thickness direction of the vehicle window glass 200. The first contour edge 2301 of the transition layer 230 is located in the coated area 204, and the second contour edge 2302 is located in the uncoated area 205. The second contour edge 2302 encloses an image acquisition area 201 within the uncoated area 205.

[0077] Please see Figure 11 , Figure 11 This is a schematic diagram of the structure of a vehicle window glass with a heat insulation layer or an electric heating layer provided in this application. The vehicle window glass 200 also includes a functional component 250, which can be a heat insulation layer or an electric heating element. The heat insulation layer is not located on the same surface as the transparent nanofilm 220, and the electric heating element is not located on the same surface as the transparent nanofilm 220. For example, when the transparent nanofilm 220 is located on the fourth surface 2132, the heat insulation layer or the electric heating element is not located on the fourth surface 2132. The heat insulation layer or the electric heating element can be located on the second surface 2112, or in the adhesive layer 212, or on the third surface 2131.

[0078] In some embodiments, no heat insulation layer or electric heating element is provided in the membrane-free area 205 to avoid interference from the heat insulation layer or electric heating element to the optical sensor 300.

[0079] The heat insulation layer enables the window glass 200 to have excellent heat insulation performance, thereby improving the comfort of the in-vehicle environment. The heat insulation layer covers at least the main viewing area 202. The total solar transmittance (TTS) of the window glass 200 with the heat insulation layer is less than or equal to 55%, preferably less than or equal to 50%, and even less than or equal to 45%. The lower the total solar transmittance, the better the heat insulation performance of the window glass 200. The heat insulation layer can be at least one selected from single silver nano-coating, double silver nano-coating, triple silver nano-coating, quadruple silver nano-coating, ITO nano-coating, FTO nano-coating, and infrared blocking micron coating. The single silver nano-coating, double silver nano-coating, triple silver nano-coating, quadruple silver nano-coating, ITO nano-coating, and FTO nano-coating can be formed by physical vapor deposition (PVD) or chemical vapor deposition (CVD), and their physical thickness is preferably 100 nm to 500 nm. The infrared blocking micron coating can be formed by sol-gel coating. The thickness of the infrared blocking micron coating is 5 μm to 30 μm. The infrared blocking micron coating is a transparent micron coating with infrared blocking nanoparticles. The material of the infrared blocking nanoparticles can be selected from at least one of ITO (indium tin oxide), FTO (fluorine-doped tin oxide), CWO (cesium-doped tungsten oxide), lanthanum hexaboride (LaB6), and vanadium pentoxide (V2O5). The average particle size of the infrared blocking nanoparticles is 20 nm to 100 nm.

[0080] The electric heating element is electrically connected to a power supply via at least two busbars. Current from the power supply is input into the electric heating element through these two busbars. The electric heating element at least covers the main viewing area 202, causing it to heat up and thus heat the main viewing area 202 to achieve defrosting, defogging, snow removal, and even de-icing functions. The power supply voltage described in this application is 12V to 52V, preferably 40V to 50V, and the electric heating element enables the main viewing area 202 to have at least 400W / m². 2 The heating power density. For example, the electric heating element enables the main viewing area 202 to have a power density of at least 800 W / m². 2 The heating power density. As another example, the electric heating element enables the main viewing area 202 to have a heating power density of at least 1000 W / m². 2 The heating power density. Further exemplarily, the electric heating element enables the main viewing area 202 to have a heating power density of at least 2000 W / m². 2The heating power density is [not specified]. The electric heating element can be a single silver electric heating coating, a double silver electric heating coating, a triple silver electric heating coating, a quadruple silver electric heating coating, a pentasilver electric heating coating, a TCO electric heating coating, a metal wire, a printed silver paste wire, a silver nanowire, a carbon fiber wire, a metal mesh, or a graphene heating plate, etc. The single silver electric heating coating, double silver electric heating coating, triple silver electric heating coating, quadruple silver electric heating coating, pentasilver electric heating coating, and TCO electric heating coating can be formed by physical vapor deposition (PVD) or chemical vapor deposition (CVD), and their physical thickness is preferably 100 nm to 500 nm. The metal wire can be at least one of copper wire, tungsten wire, aluminum wire, or copper alloy wire, and the diameter of the metal wire is 0.01 mm to 0.5 mm (including the endpoint values ​​of 0.01 mm and 0.5 mm). The printed linewidth of the printed silver paste wire is 0.1 mm to 1.0 mm (including the endpoint values ​​of 0.1 mm and 1.0 mm), and the printed thickness of the printed silver paste wire is 3 μm to 20 μm. Nanowires, carbon fiber conductors, metal mesh, or graphene heating elements are available on the market.

[0081] In some embodiments, the transparent nanofilm 220 is used to provide a head-up display (HUD) function for the window glass 200. The coating area 204 has a first reflectivity RL1 for P-polarized light with wavelengths of 380nm to 780nm incident at an incident angle of 65°, RL1≥15%, preferably RL1≥18%, more preferably RL1≥20%. By improving the reflectivity of the window glass 200 for P-polarized light through the transparent nanofilm 220, a clear head-up display function without ghosting is achieved.

[0082] Specifically, the transparent nanofilm 220 includes at least one stacked structure consisting of a high-refractive-index layer and a low-refractive-index layer, wherein the high-refractive-index layer in each stacked structure is closer to the glass body 210 than the low-refractive-index layer therein. The refractive index of the high-refractive-index layer is greater than or equal to 1.8, preferably greater than or equal to 2.0, more preferably greater than or equal to 2.2, and the material of the high-refractive-index layer is selected from at least one of oxides and mixtures of Zn, Sn, Ti, Nb, Zr, Ni, In, Al, Ce, W, Mo, Sb, Bi elements, or nitrides, oxynitrides and mixtures of Si, Al, Zr, Y, Ce, La elements, specifically TiOx, NbOx, HfO2, TaOx, MoOx, ZrOx, CeO2, WO3, BiOx, or SiZrNx, etc. The refractive index of the low refractive index layer is less than 1.8, preferably less than or equal to 1.75, more preferably less than or equal to 1.6, and the material of the low refractive index layer is selected from at least one of SiO2, Al2O3, MgF2 and mixtures thereof.

[0083] Please see Figure 12This application also provides a vehicle window assembly, including an optical sensor 300 and the aforementioned vehicle window glass 200. The optical sensor 300 is used to emit and / or receive detection light rays, which pass through the image acquisition area 201.

[0084] exist Figure 12 In the vehicle window assembly, a projection device 400 is also included. The projection device 400 emits projection light 401 to the coating area 204. The projection light 401 contains at least 80% P-polarized light. The transparent nanofilm 220 can reflect the projection light 401 to form a head-up display image observed by the driver. To improve the clarity and contrast of the head-up display image, it is preferable that the projection light 401 contains at least 85% P-polarized light, specifically, for example, 80%, 82%, 85%, 88%, 90%, 92%, 94%, 95%, 97%, 99%, 100%, etc.; more preferably, the projection light 401 contains 100% P-polarized light, that is, the projection light 401 is pure P-polarized light, which can be understood as being completely or almost completely P-polarized light.

[0085] This application prepared 2.1 mm thick transparent glass (visible light transmittance of 89%), 2.1 mm thick green glass (visible light transmittance of 83%), 2.1 mm thick transparent glass with transparent nanofilm 220, and 2.1 mm thick transparent glass with double silver nanocoating as test samples. The absorption spectrum curves S1, S2, S3, and S4 of each test sample were obtained by using a commercially available mid- and far-infrared spectrometer.

[0086] Please see Figure 13S1 shows the absorption spectrum of 2.1 mm thick green glass for infrared light in the 4000 nm–5000 nm wavelength range. The 2.1 mm thick green glass exhibits approximately 25% absorption of infrared light in this range. S2 shows the absorption spectrum of 2.1 mm thick transparent glass with a transparent nanofilm 220 for infrared light in the 4000 nm–5000 nm wavelength range. The 2.1 mm thick transparent glass with a transparent nanofilm 220 exhibits approximately 15% absorption of infrared light in this range. Absorption rate; S3 is the absorption spectrum of 2.1 mm thick transparent glass for infrared light with wavelengths of 4000 nm to 5000 nm. The 2.1 mm thick transparent glass has an absorption rate of approximately 5% for infrared light with wavelengths of 4000 nm to 5000 nm. S4 is the absorption spectrum of 2.1 mm thick transparent glass with a double silver nano-coating for infrared light with wavelengths of 4000 nm to 5000 nm. The 2.1 mm thick transparent glass with a double silver nano-coating has an absorption rate of approximately 5% for infrared light with wavelengths of 4000 nm to 5000 nm. Based on the absorption spectrum curves S2 and S3, the transparent nanofilm 220 has a first absorption rate A1 for infrared light with wavelengths of 4000 nm to 5000 nm, and A1 is approximately equal to 10%.

[0087] This application is intended to further illustrate the effect of the transition layer 230 on the optical quality of the image acquisition area using comparative examples 1-7 and embodiments 1-7.

[0088] Prepare a 2.1mm thick transparent glass sheet, and deposit a transparent nanofilm 220 on its surface to form a coated area 204. Then, perform laser removal on the transparent nanofilm 220 to form a film-free area 205. Process according to automotive glass manufacturing process, and then laminate it with another 2.1mm thick transparent glass sheet and a 0.76mm thick transparent PVB sheet to obtain the car window glass 200. In Comparative Examples 2-7 and Examples 1-7, black ceramic ink is used as the transition layer 230.

[0089] Comparative Example 1: No transition layer 230 is set;

[0090] Comparative Example 2: The transition layer 230 only covers the coated area 204 and does not cover the uncoated area 205;

[0091] Comparative Example 3: The transition layer 230 only covers the uncoated area 205 and does not cover the coated area 204;

[0092] Comparative Examples 4-7 and Examples 1-7: The transition layer 230 covers both the coated area 204 and the uncoated area 205.

[0093] The refractive power of the image acquisition area of ​​the vehicle window glass 200 was measured using the ISRA VISION LABSCAN-SCREEN system. The refractive power of the image acquisition area includes the maximum refractive power at the edges and the maximum refractive power at the center. The measurement results are recorded in Table 1. The actual measured refractive power has positive and negative values, but the positive and negative values ​​only indicate the direction of optical distortion. Positive numbers indicate that the optical distortion direction is convex, and negative numbers indicate that the optical distortion direction is concave. This application only uses the absolute value of the refractive power for explanation. The larger the absolute value of the refractive power, the greater the degree of optical distortion.

[0094] Table 1: Refractive power of the image acquisition area of ​​the vehicle window glass in Comparative Examples 1-7 and Examples 1-7

[0095]

[0096] As shown in Table 1, Comparative Example 1 lacks a transition layer 230, resulting in an absolute value of the refractive power of the image acquisition area 201 that is much greater than 150 mdpt, failing to meet the requirements of a high-resolution camera. Comparative Examples 2-7, although equipped with a transition layer 230, have distances between the first contour edge and the film removal boundary less than 10 mm, or between the second contour edge and the film removal boundary less than 10 mm, also resulting in an absolute value of the refractive power of the image acquisition area 201 that is much greater than 150 mdpt, failing to meet the requirements of a high-resolution camera.

[0097] Examples 1-7 include a transition layer 230, with the distance between the first contour edge and the film removal boundary being greater than or equal to 10 mm, and the distance between the second contour edge and the film removal boundary being greater than or equal to 10 mm. This makes the absolute value of the refractive power of the image acquisition area 201 less than or equal to 150 mdpt, or even less than or equal to 125 mdpt, or even less than or equal to 110 mdpt, significantly improving the transmittance optical quality of the image acquisition area 201 and meeting the usage requirements of high-pixel cameras.

[0098] 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 descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A type of vehicle window glass, characterized in that, Includes a glass body, a transparent nanofilm, and a transition layer; The glass body has a film-free area and a coated area, and the connection between the coated area and the film-free area forms a film removal boundary. The transparent nanofilm covers the coated area, and the transparent nanofilm is not disposed in the uncoated area; The transition layer covers the film removal boundary, and the transition layer includes a first contour edge and a second contour edge, wherein the first contour edge is located in the film-coated area and the second contour edge is located in the film-free area. The second contour edge surrounds the membrane-free area to form an image acquisition area, wherein the absolute value of the refractive power of the image acquisition area is less than or equal to 150 mdpt; The transparent nanofilm has a first absorption rate A1 for infrared light with a wavelength of 4000nm to 5000nm, where A1 is greater than 5%, and the transition layer has a second absorption rate A2 for infrared light with a wavelength of 4000nm to 5000nm, where A2 is greater than A1.

2. The vehicle window glass according to claim 1, characterized in that, The distance between the first contour edge and the film removal boundary is greater than or equal to 10 mm, and the distance between the second contour edge and the film removal boundary is greater than or equal to 10 mm.

3. The vehicle window glass according to claim 2, characterized in that, The distance between the first contour edge and the film removal boundary is 15mm to 50mm; and / or, the distance between the second contour edge and the film removal boundary is 15mm to 50mm.

4. The vehicle window glass according to claim 1, characterized in that, The glass body is a single-layer reinforced glass, which has an outer surface and an inner surface, and the transparent nanofilm is disposed on the inner surface.

5. The vehicle window glass according to claim 1, characterized in that, The glass body is laminated glass, which includes an outer glass plate, an adhesive layer and an inner glass plate. The outer glass plate has a first surface and a second surface opposite to each other, and the inner glass plate has a third surface and a fourth surface opposite to each other. The adhesive layer connects the second surface and the third surface, and the transparent nanofilm is disposed on the second surface, the third surface or the fourth surface.

6. The vehicle window glass according to claim 5, characterized in that, The transparent nanofilm is disposed on the fourth surface, and the coating area has a first reflectivity RL1 for P-polarized light with wavelengths of 380nm to 780nm incident at an incident angle of 65°, where RL1 ≥ 15%.

7. The vehicle window glass according to claim 6, characterized in that, The inner glass plate is a curved glass plate formed by bending a flat glass plate at a high temperature of at least 560°C, and both the transparent nanofilm and the transition layer are formed by bending at a high temperature of at least 560°C.

8. The vehicle window glass according to claim 6, characterized in that, The inner glass plate is colored glass, which has an absorption rate of 10% to 30% for infrared rays with wavelengths of 4000nm to 5000nm.

9. The vehicle window glass according to claim 6, characterized in that, The inner glass plate is transparent glass, and the transparent glass has an absorption rate of less than or equal to 5% for infrared rays with wavelengths of 4000nm to 5000nm.

10. The vehicle window glass according to claim 1, characterized in that, A2-A1≥5%.

11. The vehicle window glass according to claim 1, characterized in that, A2-A1≥8%.

12. The vehicle window glass according to claim 1, characterized in that, A2-A1≥10%.

13. The vehicle window glass according to claim 1, characterized in that, A2-A1≥15%.

14. The vehicle window glass according to claim 1, characterized in that, A2-A1≥20%.

15. The vehicle window glass according to claim 1, characterized in that, A2-A1≥25%.

16. The vehicle window glass according to claim 1, characterized in that, The image acquisition area has a transmittance of at least 60% TL for visible light with wavelengths of 440nm to 700nm incident at an incident angle of 65°. (440-700) .

17. The vehicle window glass according to claim 1, characterized in that, The transmittance TL of the image acquisition area for red light with a wavelength of 600nm to 700nm incident at a 65° incident angle is... (600-700) The transmittance TL of the image acquisition area for visible light with wavelengths of 440nm to 700nm incident at an incident angle of 65°. (440-700) The ratio between them is greater than or equal to 0.

8.

18. The vehicle window glass according to claim 1, characterized in that, The ratio of the transmittance Tp of the image acquisition area for P-polarized light with wavelengths of 440nm to 700nm incident at a 65° incident angle to the transmittance Ts of the image acquisition area for S-polarized light with wavelengths of 440nm to 700nm incident at a 65° incident angle is greater than or equal to 1.

45.

19. The vehicle window glass according to claim 1, characterized in that, The material of the transition layer is selected from at least one of black ceramic ink, brown ceramic ink, black ultraviolet ink, or brown ultraviolet ink.

20. The vehicle window glass according to claim 1, characterized in that, The transparent nanofilm includes at least one stacked structure consisting of a high refractive index layer and a low refractive index layer, wherein the high refractive index layer in each stacked structure is closer to the glass body than the low refractive index layer therein, the refractive index of the high refractive index layer is greater than or equal to 1.8, and the refractive index of the low refractive index layer is less than 1.

8.

21. A vehicle window assembly, characterized in that, Includes an optical sensor and a window glass as described in any one of claims 1-20, wherein the optical sensor is used to emit and / or receive probe light rays that pass through the image acquisition area.

22. The window assembly according to claim 21, characterized in that, The window assembly also includes a projection device that emits projected light rays onto the coated area, the projected light rays containing at least 80% P-polarized light.

23. The window assembly according to claim 21, characterized in that, The optical sensor is a visible light camera, which is selected from at least one of a standard camera, a narrow-angle camera, and a wide-angle camera; the horizontal field of view (HFOV) of the standard camera is 40°≤HFOV≤90°, the horizontal field of view (HFOV) of the narrow-angle camera is HFOV<40°, and the horizontal field of view (HFOV) of the wide-angle camera is 90°<HFOV≤180°.

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