Vehicle window glass and vehicle

Abstract

The invention provides vehicle window glass and a vehicle. The vehicle window glass comprises a glass body and a first functional layer. The glass body is provided with a signal transmission area. The glass body comprises an outer glass plate, a middle layer and an inner glass plate which are sequentially stacked, and the middle layer is connected between the outer glass plate and the inner glass plate; the first functional layer forms at least part of the middle layer, or the first functional layer is connected to the glass body, and the first functional layer and the middle layer are sequentially arranged in the thickness direction of the glass body; the projection of the first functional layer on the glass body in the thickness direction of the glass body at least covers the signal transmission area, the first functional layer is used for blocking ultraviolet rays, and the transmittance of the first functional layer to the ultraviolet rays with the wavelength smaller than or equal to 410 nm is smaller than or equal to 2%. According to the technical scheme, the transmittance of ultraviolet rays on the vehicle window glass can be reduced on the basis that the situation that signals of the optical sensor penetrate through the vehicle window glass is not affected, and then the anti-ultraviolet capacity of the vehicle window glass is enhanced.

Description

Technical Field

[0001] This application relates to the technical field of automobiles, and particularly to a window glass and a vehicle. Background Art

[0002] With the continuous progress of technology, modern automobiles are generally equipped with various types of optical sensors, such as lidar systems, near-infrared cameras, etc., to achieve functions such as vehicle navigation and autonomous driving. These optical sensors can be installed inside the vehicle and protected by the window glass. Currently, the sandwich structure of the window glass is usually designed to improve the transmittance of the optical sensor signal through the window glass. However, while increasing the transmittance of the optical sensor signal, it also accompanies an increase in the transmittance of ultraviolet rays, which will have an adverse impact on the optical sensors inside the vehicle. Summary of the Invention

[0003] Embodiments of this application provide a window glass and a vehicle, which can reduce the transmittance of ultraviolet rays through the window glass without affecting the passage of the optical sensor signal through the window glass, thereby enhancing the ultraviolet resistance of the window glass.

[0004] In a first aspect, this application provides a window glass, which includes a glass body and a first functional layer. The glass body has a signal transmission area;

[0005] The glass body includes an outer glass plate, an intermediate layer, and an inner glass plate that are sequentially stacked. The intermediate layer is connected between the outer glass plate and the inner glass plate;

[0006] The first functional layer forms at least part of the intermediate layer, or the first functional layer is connected to the glass body and is sequentially arranged with the intermediate layer in the thickness direction of the glass body;

[0007] The projection of the first functional layer on the glass body in the thickness direction of the glass body at least covers the signal transmission area. The first functional layer is used to block ultraviolet rays, and the transmittance of the first functional layer to ultraviolet rays with a wavelength less than or equal to 410 nm is less than or equal to 2%.

[0008] It can be understood that modern vehicles are generally equipped with various types of optical sensors, such as lidar systems, etc., in order to achieve functions such as vehicle navigation and autonomous driving. For the optical sensors installed inside the vehicle, it is necessary to ensure that the window glass has a relatively high transmittance to the optical sensor signals, so that the optical sensors can normally transmit or receive signals, and then conduct effective detection and normal operation. Currently, the sandwich structure of the window glass is usually designed to improve its transmittance to the optical sensor signals. For example, since the wavelength of the lidar signal is similar to the wavelength of near-infrared light, in vehicles equipped with built-in lidar, the original sheet glass with a relatively high transmittance to near-infrared light is usually selected to replace the traditional glass combination to prepare the window glass. However, compared with traditional window glass, this design of optimizing the sandwich structure of the window glass to improve the transmittance of optical sensor signals often also results in an increase in the transmittance of ultraviolet rays, leading to an increase in the probability and risk of ultraviolet rays damaging the optical sensors. In addition, in the sandwich structure of traditional window glass, although the intermediate layer has a certain ability to prevent ultraviolet rays, it generally can only absorb ultraviolet rays with a wavelength less than 380nm, and has a relatively poor absorption ability for long-wave ultraviolet rays with a relatively stronger penetration ability in the wavelength range of 380nm to 400nm.

[0009] Therefore, in the embodiments of the present application, by providing a first functional layer on the window glass and making the projection of the first functional layer on the glass body in the thickness direction of the glass body at least cover the signal transmission area, the sunlight passing through the window glass and irradiating on the optical sensor can filter out ultraviolet rays through the first functional layer in the window glass, greatly reducing the transmittance of ultraviolet rays on the window glass and the probability of irradiating on the optical sensor, and thus avoiding the adverse effects caused by ultraviolet irradiation on the optical sensor. In addition, in the embodiments of the present application, the first functional layer can block ultraviolet rays with a wavelength lower than 410nm, and the transmittance of ultraviolet rays with a wavelength less than or equal to 410nm is less than or equal to 2%, so that the window glass can block long-wave ultraviolet rays with a relatively stronger penetration ability in the wavelength range of 380nm to 400nm, expanding the wavelength range of ultraviolet rays that the window glass can absorb and enhancing the ultraviolet resistance of the window glass.

[0010] In a possible implementation manner, the first functional layer forms all of the intermediate layer and is connected between the outer glass plate and the inner glass plate, and the first functional layer has adhesiveness.

[0011] In a possible implementation manner, the intermediate layer includes a body and the first functional layer, the first functional layer is embedded in the body, the first functional layer and the body are connected to form an integral structure, or the first functional layer and the body are separately arranged.

[0012] In a possible implementation manner, the first functional layer is connected between the intermediate layer and the inner glass plate.

[0013] In a possible implementation manner, the first functional layer is connected to the inner glass plate and is located on a side of the inner glass plate facing away from the intermediate layer.

[0014] In a possible implementation manner, the transmittance of the first functional layer to ultraviolet rays with a wavelength less than or equal to 400 nm is less than or equal to 2%.

[0015] In a possible implementation manner, the vehicle window glass further includes a second functional layer. The second functional layer is connected between the outer glass plate and the intermediate layer. A projection of the second functional layer on the glass body in the thickness direction of the glass body is arranged in a dislocation manner with respect to the signal transmission area. The second functional layer is used to block near-infrared rays.

[0016] In a possible implementation manner, the reflectivity of the second functional layer to near-infrared rays is greater than or equal to 80%.

[0017] In a possible implementation manner, the vehicle window glass further includes a third functional layer. The third functional layer is connected to a surface of the inner glass plate facing away from the intermediate layer. A projection of the third functional layer on the glass body in the thickness direction of the glass body at least covers the signal transmission area. The third functional layer is used to reduce near-infrared reflection.

[0018] In a possible implementation manner, the vehicle window glass further includes a third functional layer;

[0019] The third functional layer is connected to a surface of the inner glass plate facing away from the intermediate layer, and the first functional layer is connected to a surface of the third functional layer facing away from the inner glass plate. A projection of the third functional layer on the glass body in the thickness direction of the glass body at least covers the signal transmission area. The third functional layer is used to reduce near-infrared reflection; or,

[0020] The first functional layer is connected to a surface of the inner glass plate facing away from the intermediate layer, and the third functional layer is connected to a surface of the first functional layer facing away from the inner glass plate. A projection of the third functional layer on the glass body in the thickness direction of the glass body at least covers the signal transmission area. The third functional layer is used to reduce near-infrared reflection.

[0021] In a possible implementation manner, the vehicle window glass further includes a third functional layer. The third functional layer is connected to the inner glass plate and is located on a side of the inner glass plate facing away from the intermediate layer. A projection of the third functional layer on the glass body in the thickness direction of the glass body at least covers the signal transmission area;

[0022] When the vehicle window glass is mounted on a vehicle body sheet metal, the transmittance of near infrared rays with a wavelength in the range of 800nm ​​to 1600nm in the signal transmission area of ​​the vehicle window glass is greater than or equal to 80%.

[0023] In a possible implementation manner, the vertical transmittance of near infrared rays with a wavelength in the range of 800 nm to 1600 nm on the outer glass plate is greater than 90%; and / or,

[0024] The vertical transmittance of near infrared rays with a wavelength in the range of 800nm ​​to 1600nm on the inner glass plate is greater than 90%.

[0025] In a second aspect, the present application also provides a vehicle, comprising a body sheet metal and a vehicle window glass as described above, wherein the vehicle window glass is mounted on the body sheet metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of the present application;

[0027] Figure 2 is along Figure 1 A schematic cross-sectional view of a partial structure of the vehicle window glass of the first embodiment obtained by cutting along the cutting line AA shown;

[0028] Figure 3 is along Figure 1 Another schematic cross-sectional view of a partial structure of the vehicle window glass of the first embodiment obtained by cutting along the cutting line AA shown;

[0029] Figure 4 is along Figure 1 A schematic cross-sectional view of a partial structure of the vehicle window glass of the second embodiment obtained by cutting along the cutting line AA shown;

[0030] Figure 5 is along Figure 1 A schematic cross-sectional view of a partial structure of the vehicle window glass of the third embodiment obtained by cutting along the cutting line AA shown;

[0031] Figure 6 yes Figure 1 A schematic cross-sectional view of a partial structure of the vehicle window glass of the fourth embodiment obtained by cutting along the cutting line AA shown;

[0032] Figure 7 yes Figure 1 Another schematic cross-sectional view of a partial structure of the vehicle window glass of the fourth embodiment obtained by cutting along the cutting line AA is shown.

[0033] Reference numerals:

[0034] Vehicle 200, body sheet metal 210, optical sensor 220, window glass 100, glass body 10, first functional layer 20, signal transmission area 11, outer glass plate 12, intermediate layer 13, inner glass plate 14, body 131, second functional layer 30, third functional layer 40. Detailed implementation

[0035] For the convenience of understanding, the terms involved in the embodiments of the present application are first explained.

[0036] And / or: It is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0037] Multiple: It means two or more than two.

[0038] Connection: It should be understood in a broad sense. For example, when A is connected to B, it can be that A is directly connected to B, or A is indirectly connected to B through an intermediate medium.

[0039] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. It should be noted that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0040] The embodiments of the present application provide a window glass and a vehicle.

[0041] Please refer to Figure 1 , Figure 1 is a schematic structural diagram of a vehicle 200 provided by an embodiment of the present application. The vehicle 200 may include a window glass 100, a body sheet metal 210, and an optical sensor 220. The window glass 100 is installed on the body sheet metal 210 and encloses a receiving space of the vehicle 200 with the body sheet metal 210. The optical sensor 220 is located in the receiving space of the vehicle 200. Signals emitted or received by the optical sensor 220 can be transmitted through the window glass 100. Among them, the window glass 100 may be one or more of the front windshield, rear windshield, sunroof glass, side window glass, and corner window glass of the vehicle 200. The optical sensor 220 may be a combination of one or more of a lidar, a near-infrared camera, a visible light camera, an infrared thermal imager, etc.

[0042] It should be noted that Figure 1The purpose is only to schematically describe the connection relationship between the window glass 100, the vehicle body sheet metal 210, and the optical sensor 220, and does not specifically limit the connection positions, specific structures, and quantities of each component. In other embodiments of the present application, the vehicle 200 may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0043] In the following, the window glass 100 is taken as the front windshield of the vehicle 200, and the optical sensor 220 is taken as a lidar for example for illustration, but it should be understood that this is not a limitation.

[0044] It can be understood that lidar is a sensor that measures distances and creates a three-dimensional map of the environment by emitting laser pulses and receiving the reflected signals. The wavelength of lidar signals is usually selected in the near-infrared band, and the commonly used wavelengths are 905nm and 1550nm. Among them, lidar with a wavelength of 905nm usually uses silicon-based photodetectors, such as avalanche photodiodes (APDs). Lidar with a wavelength of 1550nm usually uses indium gallium arsenide (InGaAs) detectors because silicon is insensitive at this wavelength. In addition, the selection of these two wavelengths also takes into account eye safety. Lidar signals with a wavelength of 1550nm are safer for the human eye at the same power, so higher power can be allowed, and the detectable distance is also farther.

[0045] However, during the use of lidar, the irradiation of ultraviolet rays in sunlight will have a great adverse impact on the structure and performance of lidar. Specifically, the ultraviolet rays in sunlight can be divided into long-wave ultraviolet rays (UV-A, with wavelengths in the range of 315nm to 400nm, including the end-point values 315nm and 400nm), medium-wave ultraviolet rays (UV-B, with wavelengths in the range of 280nm to 315nm), and short-wave ultraviolet rays (UV-C, with wavelengths in the range of 100nm to 280nm, including the end-point values 100nm and 280nm). Among them, long-wave ultraviolet rays have relatively strong penetration ability and can penetrate clouds and glass, and have a relatively large impact on equipment. While most medium-wave and short-wave ultraviolet rays are absorbed by the atmosphere, and generally have little impact on equipment except in special environments (such as high altitude or in a laboratory). Therefore, it is usually necessary to avoid exposing equipment to ultraviolet rays, especially to long-wave ultraviolet rays.

[0046] For lidar, ultraviolet light may cause the optical components (such as lenses and protective windows) made of polymer or glass materials in the lidar to gradually age, manifested as yellowing, embrittlement, or a decrease in light transmittance. Long-term exposure to ultraviolet light will reduce the laser emission or reception efficiency of the lidar, affecting the detection range and detection accuracy of the lidar. Moreover, lidars with a wavelength of 905 nm commonly use silicon-based photodetectors, and silicon itself is relatively sensitive to ultraviolet light. Therefore, if ultraviolet light directly irradiates the detector, it may generate additional noise current in the detector, affecting the signal-to-noise ratio and increasing the measurement error of the lidar. In contrast, lidars with a wavelength of 1550 nm commonly use indium gallium arsenide detectors, which have a lower response to ultraviolet light, but this also depends on the specific design and whether there are filtering measures. And ultraviolet light may cause thermal effects or structural damage to the detector material, especially more obvious at high power. In addition, the receiving end of the lidar usually uses a narrowband filter to selectively allow light of a specific wavelength to pass through (such as a band-pass filter for 905 nm or 1550 nm), and ultraviolet light irradiation may affect the performance of the filter, resulting in a shift in the transmittance of the filter material (such as a multilayer dielectric film), or making the bandwidth of the filter (the wavelength range of light that can pass through the filter) wider. This change may cause stray light in the environment (such as ultraviolet light) to also pass through the filter and enter the detector, thus interfering with the normal signal of the lidar.

[0047] When lidar is applied in the automotive field, there are generally two installation methods relative to the outside and inside of the vehicle. When the lidar is installed outside the vehicle, ultraviolet isolation can be achieved by performing special process treatment on the surface of the radome integrated on the lidar to avoid adverse effects of ultraviolet light on the lidar. For lidars installed inside the vehicle, due to the protection of the window glass, from the perspective of cost reduction, materials with a low environmental resistance level can be used to replace the traditional lidar radome. Or, the lidar radome can be directly removed. Then, at this time, it is necessary to improve the ultraviolet resistance of the window glass to protect the lidar.

[0048] In the prior art, since the wavelength band of the lidar signal is close to that of near-infrared light, in vehicles with an in-vehicle lidar, glass materials with a relatively high near-infrared transmittance are usually selected as the window glass. For example, original glass with a relatively high near-infrared transmittance is selected to replace the traditional glass combination (such as the green glass + green glass combination) to improve the transmittance of the window glass to the lidar signal, thereby improving the laser emission or reception efficiency and detection accuracy of the lidar. However, compared with traditional window glass, this kind of glass with a relatively high transmittance to near-infrared light often also comes with an increase in ultraviolet transmittance, thus increasing the probability and risk of ultraviolet light damaging the lidar.

[0049] Based on this, the embodiment of the present application provides a vehicle window glass 100, which can reduce the transmittance of the vehicle window glass 100 to ultraviolet rays without affecting the optical sensor 220 signal (i.e., laser radar signal) passing through the vehicle window glass 100, thereby enhancing the anti-ultraviolet ability of the vehicle window glass 100. It should be noted that the optical sensor 220 signal described below refers to the laser radar signal.

[0050] The structure of the vehicle window glass 100 will be described in detail below through four specific embodiments.

[0051] First embodiment:

[0052] Please refer to Figure 1 and Figure 2 , Figure 2 is along Figure 1 The section line AA shown is a schematic cross-sectional view of a partial structure of the vehicle window glass 100 of the first embodiment.

[0053] For the convenience of description, the length direction of the vehicle window glass 100 is defined as the X direction, the width direction of the vehicle window glass 100 is defined as the Y direction, and the thickness direction of the vehicle window glass 100 is defined as the Z direction. The X direction, the Y direction, and the Z direction are perpendicular to each other.

[0054] The vehicle window glass 100 may include a glass body 10 and a first functional layer 20. The first functional layer 20 may form a portion of the glass body 10 and be used to block ultraviolet rays. The glass body 10 has a signal transmission area 11 (such as Figure 2 The signal transmission area 11 is an area on the vehicle window glass 100 through which the optical sensor 220 signal can pass. The optical sensor 220 signal can be a signal emitted and received by the optical sensor 220. That is, all signals emitted or received by the optical sensor 220 will pass through the signal transmission area 11 on the vehicle window glass 100.

[0055] The glass body 10 may include an outer glass plate 12, an intermediate layer 13, and an inner glass plate 14. In the thickness direction (Z direction in the figure) of the glass body 10, the outer glass plate 12, the intermediate layer 13, and the inner glass plate 14 are stacked in sequence. The outer glass plate 12 is close to the outside of the vehicle 200. The inner glass plate 14 is close to the inside of the vehicle 200.

[0056] The outer glass plate 12 has a high near-infrared transmittance. Exemplarily, the outer glass plate 12 can be a raw glass.

[0057] In a possible implementation, the perpendicular transmittance of near-infrared light with a wavelength in the range of 800 nm to 1600 nm (including the end values 800 nm and 1600 nm) through the outer glass plate 12 is greater than 90%. Herein, the perpendicular transmittance of the near-infrared light through the outer glass plate 12 is the transmittance of the near-infrared light passing through the outer glass plate 12 along the thickness direction of the outer glass plate 12 (the illustrated Z direction). Exemplarily, the perpendicular transmittance of the near-infrared light with a wavelength of 905 nm through the outer glass plate 12 is greater than 90%. The perpendicular transmittance of the near-infrared light with a wavelength of 1550 nm through the outer glass plate 12 is greater than 90%.

[0058] In this embodiment, the inner glass plate 14 also has a high transmittance of near-infrared light. Exemplarily, the inner glass plate 14 can be a raw glass sheet.

[0059] In a possible implementation, the perpendicular transmittance of near-infrared light with a wavelength in the range of 800 nm to 1600 nm (including the end values 800 nm and 1600 nm) through the inner glass plate 14 is greater than 90%. Herein, the perpendicular transmittance of the near-infrared light through the inner glass plate 14 is the transmittance of the near-infrared light passing through the inner glass plate 14 along the thickness direction of the inner glass plate 14 (the illustrated Z direction). Exemplarily, the perpendicular transmittance of the near-infrared light with a wavelength of 905 nm through the inner glass plate 14 is greater than 90%. The perpendicular transmittance of the near-infrared light with a wavelength of 1550 nm through the inner glass plate 14 is greater than 90%.

[0060] In this embodiment, since the wavelength band of the optical sensor 220 signal (i.e., the lidar signal) is similar to that of the near-infrared light, both the outer glass plate 12 and the inner glass plate 14 have a high transmittance for the optical sensor 220 signal. Exemplarily, the perpendicular transmittance of the optical sensor 220 signal with a wavelength of 905 nm through both the outer glass plate 12 and the inner glass plate 14 is greater than 90%. The perpendicular transmittance of the optical sensor 220 signal with a wavelength of 1550 nm through both the outer glass plate 12 and the inner glass plate 14 is greater than 90%.

[0061] It can be understood that by making the outer glass plate 12 and the inner glass plate 14 have a high transmittance for the optical sensor 220 signal, the problem that the optical sensor 220 signal is blocked by the outer glass plate 12 and the inner glass plate 14 can be avoided, enabling the optical sensor 220 to effectively detect the target and maintain its detection accuracy.

[0062] Please refer to Figure 2 and Figure 3 , Figure 3 is another cross-sectional view of a partial structure of the window glass 100 of the first embodiment taken along the cutting line A-A shown in Figure 1 .

[0063] The first functional layer 20 is connected between the outer glass plate 12 and the inner glass plate 14 and forms at least part of the intermediate layer 13. The projection of the first functional layer 20 on the glass body 10 in the thickness direction of the glass body 10 at least covers the signal transmission area 11. Exemplarily, the material of the first functional layer 20 may be polyvinyl butyral (PVB) or ethylene-vinyl acetate copolymer (EVA), etc.

[0064] Among them, the fact that the first functional layer 20 forms at least part of the intermediate layer 13 is only considered from the perspective of position, and does not mean that the part of the intermediate layer 13 formed by the first functional layer 20 is the same as other parts of the intermediate layer 13 described above in terms of composition, properties, etc. The difference is that the part of the intermediate layer 13 composed of the first functional layer 20 has a greater ability to absorb ultraviolet rays than other parts of the intermediate layer 13.

[0065] It can be understood that by making the projection of the first functional layer 20 on the glass body 10 in the thickness direction of the glass body 10 at least cover the signal transmission area 11, the sunlight irradiated on the optical sensor 220 will pass through the first functional layer 20 in the window glass 100, and then the ultraviolet rays in the sunlight will be removed by the first functional layer 20, avoiding damage to the optical sensor 220 caused by ultraviolet rays.

[0066] In this embodiment, the first functional layer 20 can absorb ultraviolet rays with a wavelength less than or equal to 410 nm, and the transmittance of ultraviolet rays with a wavelength less than or equal to 410 nm is less than or equal to 2%. Preferably, the transmittance of the first functional layer 20 to ultraviolet rays with a wavelength less than or equal to 410 nm is less than or equal to 1.5%. More preferably, the transmittance of the first functional layer 20 to ultraviolet rays with a wavelength less than or equal to 410 nm is less than or equal to 1%. More preferably, the transmittance of the first functional layer 20 to ultraviolet rays with a wavelength less than or equal to 410 nm is less than or equal to 0.5%. More preferably, the transmittance of the first functional layer 20 to ultraviolet rays with a wavelength less than or equal to 410 nm is less than or equal to 0.3%. More preferably, the transmittance of the first functional layer 20 to ultraviolet rays with a wavelength less than or equal to 410 nm is less than or equal to 0.1%.

[0067] Further, the first functional layer 20 can also absorb only ultraviolet light with a wavelength less than or equal to 400 nm, and the transmittance of the ultraviolet light with a wavelength less than or equal to 400 nm is less than or equal to 2%. Preferably, the transmittance of the ultraviolet light with a wavelength less than or equal to 400 nm of the first functional layer 20 is less than or equal to 1.5%. More preferably, the transmittance of the ultraviolet light with a wavelength less than or equal to 400 nm of the first functional layer 20 is less than or equal to 1%. More preferably, the transmittance of the ultraviolet light with a wavelength less than or equal to 400 nm of the first functional layer 20 is less than or equal to 0.5%. More preferably, the transmittance of the ultraviolet light with a wavelength less than or equal to 400 nm of the first functional layer 20 is less than or equal to 0.3%. More preferably, the transmittance of the ultraviolet light with a wavelength less than or equal to 400 nm of the first functional layer 20 is less than or equal to 0.1%.

[0068] It can be understood that in traditional vehicle window glass, although the intermediate layer has a certain ultraviolet protection ability, it generally can only absorb ultraviolet light with a wavelength less than 380 nm, and has poor absorption ability for long-wave ultraviolet light in the wavelength range of 380 nm to 400 nm. However, the penetration ability of long-wave ultraviolet light is relatively strong and it also causes relatively great damage to optical sensors.

[0069] Therefore, in this embodiment, by enabling the first functional layer 20 to block ultraviolet light with a wavelength lower than 410 nm, the wavelength range of ultraviolet light that the vehicle window glass 100 can absorb is increased. Also, since the transmittance of the ultraviolet light with a wavelength less than or equal to 410 nm of the first functional layer 20 is less than or equal to 2%, this greatly enhances the ultraviolet absorption ability of the vehicle window glass 100. In summary, the setting of the first functional layer 20 improves the overall ultraviolet resistance of the vehicle window glass 100, thereby effectively protecting the optical sensor 220 from the influence of ultraviolet light.

[0070] In a possible implementation manner, please refer to Figure 2 , the first functional layer 20 forms the entire intermediate layer 13. That is, the projection of the first functional layer 20 on the glass body 10 in the thickness direction of the glass body 10 covers the entire outer glass plate 12 and / or the entire inner glass plate 14. The first functional layer 20 has adhesiveness to bond the outer glass plate 12 and the inner glass plate 14 together.

[0071] It can be understood that forming the first functional layer 20 as the entire intermediate layer 13 can, on the basis of enhancing the ultraviolet resistance of the vehicle window glass 100, eliminate the assembly steps of the intermediate layer 13 and simplify the production process.

[0072] In another possible implementation manner, please refer to Figure 3, the first functional layer 20 forms part of the intermediate layer 13. Specifically, the intermediate layer 13 may include a main body 131 and the first functional layer 20. The first functional layer 20 is embedded in the main body 131. Among them, the first functional layer 20 may be separately provided from the main body 131. For example, the first functional layer 20 is placed inside the main body 131 and assembled with the main body 131 by mechanical fixing, adhesion or other means. Or, the first functional layer 20 may also be connected to the main body 131 to form an integral structure. For example, by enhancing the ultraviolet absorption ability of the intermediate layer 13 in the signal transmission area 11, this part of the intermediate layer 13 can be used as the first functional layer 20 to achieve the ultraviolet protection function of the window glass 100, and the remaining part of the intermediate layer 13 is the main body 131 of the intermediate layer 13.

[0073] It can be understood that in this embodiment, by providing the first functional layer 20 between the outer glass plate 12 and the inner glass plate 14, and enabling the first functional layer 20 to block ultraviolet rays with a wavelength lower than 410 nm, and the transmittance of ultraviolet rays with a wavelength less than or equal to 410 nm is less than or equal to 2%, the window glass 100 can block long-wave ultraviolet rays with stronger penetration ability in the range of 380 nm to 400 nm, making up for the deficiency that traditional window glass 100 can only absorb ultraviolet rays with a wavelength less than 380 nm, and greatly enhancing the ultraviolet resistance of the window glass 100. In addition, by making the first functional layer 20 at least cover the signal transmission area 11, the sunlight irradiated on the optical sensor 220 can be filtered by the first functional layer 20 in the window glass 100 to remove ultraviolet rays, greatly reducing the probability of ultraviolet rays irradiating on the optical sensor 220, and thus avoiding the adverse effects caused by ultraviolet irradiation on the optical sensor 220.

[0074] Please continue to refer to Figure 2 and Figure 3, the window glass 100 may further include a second functional layer 30. The second functional layer 30 is connected between the outer glass plate 12 and the intermediate layer 13. That is, the second functional layer 30 is connected between the outer glass plate 12 and the first functional layer 20. The projection of the second functional layer 30 on the glass body 10 in the thickness direction of the glass body 10 is arranged offset from the signal transmission area 11, so that when the optical sensor 220 signal passes through the window glass 100, it can avoid the second functional layer 30 on the window glass 100. The second functional layer 30 is used to block near-infrared rays. Exemplarily, the second functional layer 30 may be a near-infrared reflection (IRR) coating layer. The reflectivity of the second functional layer 30 to near-infrared rays may be greater than or equal to 80%. Preferably, the reflectivity of the second functional layer 30 to near-infrared rays may be greater than or equal to 85%. More preferably, the reflectivity of the second functional layer 30 to near-infrared rays may be greater than or equal to 90%. More preferably, the reflectivity of the second functional layer 30 to near-infrared rays may be greater than or equal to 95%. In addition, in this embodiment, the color of the second functional layer 30 can be customized by adjusting the Lab value of the second functional layer 30, so as to manufacture the window glass 100 with a color that meets the requirements.

[0075] It can be understood that, since the outer glass plate 12 has a high near-infrared transmittance, in order to avoid heat accumulation caused by near-infrared radiation, it is necessary to enhance the anti-near-infrared ability of the window glass 100. Thus, in this embodiment, by providing the second functional layer 30 with a high near-infrared reflectivity between the outer glass plate 12 and the intermediate layer 13, effective blocking of near-infrared rays is achieved, and the phenomenon that the temperature inside the vehicle increases due to the too high near-infrared transmittance of the outer glass plate 12 is avoided, thereby improving the thermal insulation performance and comfort of the vehicle 200.

[0076] In addition, since the wavelength band of the optical sensor 220 signal is close to that of near-infrared rays, in order to avoid the second functional layer 30 from hindering the transmission of the optical sensor 220 signal and affecting the detection of the optical sensor 220. In this embodiment, by arranging the projection of the second functional layer 30 on the glass body 10 in the thickness direction of the glass body 10 offset from the signal transmission area 11, it is possible to effectively block near-infrared rays from penetrating the window glass 100 and at the same time not affect the normal passage of the optical sensor 220 signal through the window glass 100, so that the optical sensor 220 can perform effective detection and normal operation.

[0077] In summary, on the basis of ensuring that the signal of the optical sensor 220 can penetrate the window glass 100 normally, the first functional layer 20 and the second functional layer 30 are provided in this embodiment to reduce the transmittance of the window glass 100 to ultraviolet rays and near-infrared rays respectively, avoiding the influence of ultraviolet ray irradiation on the optical sensor 220 and the influence of near-infrared ray irradiation on the vehicle components inside the vehicle and the vehicle interior temperature, and improving the applicability of the optical sensor 220 when it is built into the vehicle 200. In addition, the lidar cover is cancelled in this embodiment, reducing the production cost.

[0078] Please continue to refer to Figure 2 and Figure 3 , the window glass 100 may further include a third functional layer 40. The third functional layer 40 is connected to the surface of the inner glass plate 14 facing away from the intermediate layer 13. Exemplarily, the third functional layer 40 may be installed on the surface of the inner glass plate 14 facing away from the intermediate layer 13 by means of film sticking, patch sticking or coating. The projection of the third functional layer 40 on the glass body 10 in the thickness direction of the glass body 10 at least covers the signal transmission area 11. The third functional layer 40 is used to reduce the reflection of near-infrared rays. Since the wavelength band of the signal of the optical sensor 220 in this embodiment is similar to the wavelength band of near-infrared rays, therefore, the third functional layer 40 is also used to reduce the reflection of the signal of the optical sensor 220.

[0079] It can be understood that when the signal of the optical sensor 220 is transmitted from the inside of the vehicle 200 to the outside of the vehicle 200, the signal of the optical sensor 220 will be reflected when passing through the surface of the inner glass plate 14 facing away from the intermediate layer 13, resulting in a decrease in the transmittance of the signal of the optical sensor 220 on the window glass 100. By providing the third functional layer 40 on the surface of the inner glass plate 14 facing away from the intermediate layer 13 in this embodiment, the reflection that occurs when the signal of the optical sensor 220 passes through the surface of the inner glass plate 14 facing away from the intermediate layer 13 can be reduced, and further the transmittance of the signal of the optical sensor 220 on the window glass 100 can be increased, so that the optical sensor 220 can effectively detect.

[0080] In this embodiment, at the installation angle (i.e., when the window glass 100 is installed on the body sheet metal 210), the transmittance of the optical sensor 220 signal with a wavelength in the range of 800 nm to 1600 nm (including the end values 800 nm and 1600 nm) on the window glass 100 is greater than or equal to 80%. Preferably, at the installation angle, the transmittance of the optical sensor 220 signal with a wavelength in the range of 800 nm to 1600 nm (including the end values 800 nm and 1600 nm) on the window glass 100 is greater than or equal to 85%. More preferably, at the installation angle, the transmittance of the optical sensor 220 signal with a wavelength in the range of 800 nm to 1600 nm (including the end values 800 nm and 1600 nm) on the window glass 100 is greater than or equal to 90%. Even more preferably, at the installation angle, the transmittance of the optical sensor 220 signal with a wavelength in the range of 800 nm to 1600 nm (including the end values 800 nm and 1600 nm) on the window glass 100 is greater than or equal to 95%.

[0081] Exemplarily, at the installation angle, the transmittance of the optical sensor 220 signal with a wavelength of 905 nm on the window glass 100 is greater than or equal to 80%. Or, at the installation angle, the transmittance of the optical sensor 220 signal with a wavelength of 1550 nm on the window glass 100 is greater than or equal to 80%.

[0082] It should be noted that the installation angle is the angle between the window glass 100 and the horizontal plane. Among them, the horizontal plane is a plane parallel to the length direction and the width direction of the vehicle 200. When the window glass 100 is the front windshield of the vehicle 200, the installation angle is usually 20° - 40°, such as 20°, 25°, 30°, 35°, 40°, etc. The optical sensor 220 is usually horizontally installed (i.e., the optical sensor 220 is usually arranged parallel to the above-mentioned horizontal plane). The incident angle of the optical sensor 220 signal on the window glass 100 is approximately 50° - 70°, such as 50°, 55°, 60°, 65°, 70°, etc.

[0083] In some other embodiments, when at the installation angle (i.e., when the window glass 100 is installed on the body sheet metal 210), the transmittance of the optical sensor 220 signal with a wavelength in the range of 800 nm to 1600 nm (including the end values 800 nm and 1600 nm) on the window glass 100 is greater than or equal to 80%, the third functional layer 40 may not be provided either.

[0084] It is understandable that the reflectivity of the optical sensor 220 signal passing through the window glass 100 is different at different angles. The greater the inclination angle of the window glass 100, the greater the reflectivity of the optical sensor 220 signal passing through the window glass 100. When the optical sensor 220 signal passes through the window glass 100 vertically (i.e., the optical sensor 220 signal passes through the window glass 100 along the thickness direction of the window glass 100), the reflectivity of the optical sensor 220 signal passing through the window glass 100 is the smallest and the transmittance is the largest. In contrast, after the window glass 100 is mounted on the body sheet metal 210, the inclination angle of the window glass 100 increases, and the reflectivity of the optical sensor 220 signal passing through the window glass 100 increases, resulting in a decrease in the transmittance of the optical sensor 220 signal. Therefore, if the transmittance of the optical sensor 220 signal on the vehicle window glass 100 can reach or exceed 80% at the vehicle loading angle, this means that even without the help of the third functional layer 40, the transmittance of the optical sensor 220 signal of not less than 80% can enable the optical sensor 220 to perform effective detection.

[0085] Second embodiment:

[0086] See also Figure 4 , Figure 4 is along Figure 1 The section line AA shown is a schematic cross-sectional view of a partial structure of the vehicle window glass 100 of the second embodiment.

[0087] In this embodiment, the same contents as those in the first embodiment are not repeated. The difference from the first embodiment is that the first functional layer 20 is an independent layer structure, and is independent of the intermediate layer 13, and is sequentially arranged with the intermediate layer 13 in the thickness direction of the glass body 10. That is, the first functional layer 20 and the intermediate layer 13 are arranged separately. Specifically, the first functional layer 20 is connected between the intermediate layer 13 and the inner glass plate 14. In addition, the description of the vehicle window glass 100 below can be applied to the first embodiment above without conflict.

[0088] It can be understood that, in this embodiment, by arranging the first functional layer 20 between the middle layer 13 and the inner glass plate 14, the sunlight irradiating to the optical sensor 220 can be filtered by the first functional layer 20 in the window glass 100 to filter the ultraviolet rays, thereby reducing the probability of ultraviolet rays irradiating the optical sensor 220 and enhancing the anti-ultraviolet ability of the window glass 100.

[0089] In this embodiment, the projection of the first functional layer 20 on the glass body 10 along the thickness direction of the glass body 10 can cover the entire intermediate layer 13 and / or the entire inner glass plate 14 (eg, Figure 4). Wherein, the haze of the first functional layer 20 is less than 1%. Preferably, the haze of the first functional layer 20 is less than 0.5%. More preferably, the haze of the first functional layer 20 is less than 0.3%. More preferably, the haze of the first functional layer 20 is less than 0.1%. The transmittance of near infrared light on the first functional layer 20 is greater than 95%. That is, the transmittance of the optical sensor 220 signal on the first functional layer 20 is greater than 95%. The transmittance of visible light on the first functional layer 20 is greater than 85%. Preferably, the transmittance of visible light on the first functional layer 20 is greater than 90%. More preferably, the transmittance of visible light on the first functional layer 20 is greater than 95%.

[0090] In some other embodiments, the projection of the first functional layer 20 on the glass body 10 along the thickness direction of the glass body 10 may also only cover a portion of the intermediate layer 13 and / or a portion of the inner glass plate 14. It is sufficient as long as the projection of the first functional layer 20 on the glass body 10 along the thickness direction of the glass body 10 at least covers the signal transmission area 11.

[0091] Third embodiment:

[0092] See also Figure 5 , Figure 5 is along Figure 1 The section line AA shown is a schematic cross-sectional view of a partial structure of the vehicle window glass 100 of the third embodiment.

[0093] In this embodiment, the same contents as those in the second embodiment are not repeated here. The difference from the second embodiment is that the first functional layer 20 is connected to the surface of the third functional layer 40 away from the inner glass plate 14. That is, in the thickness direction of the vehicle window glass 100, the third functional layer 40 and the first functional layer 20 are sequentially stacked and arranged on the surface of the inner glass plate 14 away from the intermediate layer 13. Further, the projection of the first functional layer 20 on the glass body 10 along the thickness direction of the glass body 10 is located within the projection of the third functional layer 40 on the glass body 10 along the thickness direction of the glass body 10. In addition, the description of the vehicle window glass 100 below can be applied to the first embodiment and the second embodiment above without conflict.

[0094] It can be understood that, by arranging the first functional layer 20 on the surface of the third functional layer 40 facing away from the inner glass plate 14, the present embodiment can also make the sunlight irradiated onto the optical sensor 220 pass through the first functional layer 20 in the vehicle window glass 100 to filter the ultraviolet rays, thereby reducing the probability of ultraviolet rays irradiating the optical sensor 220 and enhancing the anti-ultraviolet ability of the vehicle window glass 100.

[0095] For a possible implementation, see Figure 5, the third functional layer 40 is connected to the surface of the inner glass plate 14 away from the intermediate layer 13. The projection of the third functional layer 40 on the glass body 10 along the thickness direction of the glass body 10 just covers the signal transmission area 11. The first functional layer 20 is connected to the surface of the third functional layer 40 away from the inner glass plate 14. The projection of the first functional layer 20 on the glass body 10 along the thickness direction of the glass body 10 coincides with the projection of the third functional layer 40 on the glass body 10 along the thickness direction of the glass body 10, and just covers the signal transmission area 11.

[0096] Fourth embodiment:

[0097] Please refer to Figure 6 and Figure 7 , Figure 6 yes Figure 1 A schematic cross-sectional view of a partial structure of the vehicle window glass 100 of the fourth embodiment obtained by cutting along the cutting line AA shown in FIG. Figure 7 yes Figure 1 Another schematic cross-sectional view of a partial structure of the vehicle window glass 100 according to the fourth embodiment obtained by cutting along the cutting line AA is shown.

[0098] In this embodiment, the same contents as those in the second embodiment are not repeated here. The difference from the second embodiment is that the first functional layer 20 is connected to the surface of the inner glass plate 14 away from the intermediate layer 13. The third functional layer 40 is connected to the surface of the first functional layer 20 away from the inner glass plate 14. That is, in the thickness direction of the vehicle window glass 100, the first functional layer 20 and the third functional layer 40 are sequentially stacked and arranged on the surface of the inner glass plate 14 away from the intermediate layer 13. Further, the projection of the third functional layer 40 on the glass body 10 along the thickness direction of the glass body 10 is located within the projection of the first functional layer 20 on the glass body 10 along the thickness direction of the glass body 10. In addition, the description of the vehicle window glass 100 below can be applied to the first embodiment, the second embodiment and the third embodiment above without conflict.

[0099] It can be understood that, in this embodiment, by arranging the first functional layer 20 on the surface of the inner glass plate 14 facing away from the intermediate layer 13, the sunlight irradiated to the optical sensor 220 can be filtered by the first functional layer 20 in the vehicle window glass 100 to filter the ultraviolet rays, thereby reducing the probability of ultraviolet rays irradiating the optical sensor 220 and enhancing the anti-ultraviolet ability of the vehicle window glass 100.

[0100] For a possible implementation, see Figure 6, the first functional layer 20 is connected to the surface of the inner glass plate 14 facing away from the intermediate layer 13. The projection of the first functional layer 20 on the glass body 10 in the thickness direction of the glass body 10 just covers the signal transmission area 11. The third functional layer 40 is connected to the surface of the first functional layer 20 facing away from the inner glass plate 14. Within the projection of the third functional layer 40 on the glass body 10 in the thickness direction of the glass body 10, it coincides with the projection of the first functional layer 20 on the glass body 10 in the thickness direction of the glass body 10 and just covers the signal transmission area 11.

[0101] In another possible implementation, please refer to Figure 7 , the first functional layer 20 is connected to the surface of the inner glass plate 14 facing away from the intermediate layer 13. The projection of the first functional layer 20 on the glass body 10 in the thickness direction of the glass body 10 covers the entire surface of the inner glass plate 14 facing away from the intermediate layer 13. The third functional layer 40 is connected to the surface of the first functional layer 20 facing away from the inner glass plate 14. The projection of the third functional layer 40 on the glass body 10 in the thickness direction of the glass body 10 is located within the projection of the first functional layer 20 on the glass body 10 in the thickness direction of the glass body 10 and just covers the signal transmission area 11. In this implementation, the haze of the first functional layer 20 is less than 1%. Preferably, the haze of the first functional layer 20 is less than 0.5%. More preferably, the haze of the first functional layer 20 is less than 0.3%. Even more preferably, the haze of the first functional layer 20 is less than 0.1%. The transmittance of near-infrared light through the first functional layer 20 is greater than 95%. That is, the transmittance of the optical sensor 220 signal through the first functional layer 20 is greater than 95%. The transmittance of visible light through the first functional layer 20 is greater than 85%. Preferably, the transmittance of visible light through the first functional layer 20 is greater than 90%. More preferably, the transmittance of visible light through the first functional layer 20 is greater than 95%.

[0102] The above has introduced the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A vehicle window glass, characterized in that, The window glass includes a glass body and a first functional layer, and the glass body has a signal transmission area; The glass body includes an outer glass plate, an intermediate layer, and an inner glass plate that are sequentially stacked, and the intermediate layer is connected between the outer glass plate and the inner glass plate; The first functional layer forms at least part of the intermediate layer, or the first functional layer is connected to the glass body and is sequentially arranged with the intermediate layer in the thickness direction of the glass body; The projection of the first functional layer on the glass body in the thickness direction of the glass body covers at least the signal transmission area, the first functional layer is used to block ultraviolet rays, and the transmittance of the first functional layer to ultraviolet rays with a wavelength less than or equal to 410 nm is less than or equal to 2%.

2. The window glass according to claim 1, characterized in that, The first functional layer forms all of the intermediate layer and is connected between the outer glass plate and the inner glass plate, and the first functional layer has adhesiveness.

3. The window glass according to claim 1, wherein, The intermediate layer includes a body and the first functional layer, the first functional layer is embedded in the body, and the first functional layer and the body are connected to form an integral structure, or the first functional layer and the body are separately arranged.

4. The window glass according to claim 1, characterized in that, The first functional layer is connected between the intermediate layer and the inner glass plate.

5. The window glass according to claim 1, characterized in that, The first functional layer is connected to the inner glass plate and is located on the side of the inner glass plate facing away from the intermediate layer.

6. The window glass according to any one of claims 1-5, characterized in that, The transmittance of the first functional layer to ultraviolet rays with a wavelength less than or equal to 400 nm is less than or equal to 2%.

7. The window glass according to any one of claims 1-5, characterized in that, The window glass further includes a second functional layer, the second functional layer is connected between the outer glass plate and the intermediate layer, the projection of the second functional layer on the glass body in the thickness direction of the glass body is arranged offset from the signal transmission area, and the second functional layer is used to block near-infrared rays.

8. The window glass according to claim 7, characterized in that, The reflectivity of the second functional layer to near-infrared rays is greater than or equal to 80%.

9. The window glass according to any one of claims 2-4, characterized in that, The window glass further includes a third functional layer, the third functional layer is connected to the surface of the inner glass plate facing away from the intermediate layer, the projection of the third functional layer on the glass body in the thickness direction of the glass body covers at least the signal transmission area, and the third functional layer is used to reduce near-infrared reflection.

10. The window glass according to claim 5, characterized in that, The window glass further includes a third functional layer; The third functional layer is connected to the surface of the inner glass plate facing away from the intermediate layer, the first functional layer is connected to the surface of the third functional layer facing away from the inner glass plate, the projection of the third functional layer on the glass body in the thickness direction of the glass body covers at least the signal transmission area, and the third functional layer is used to reduce near-infrared reflection; or The first functional layer is connected to the surface of the inner glass plate facing away from the intermediate layer, the third functional layer is connected to the surface of the first functional layer facing away from the inner glass plate, the projection of the third functional layer on the glass body in the thickness direction of the glass body covers at least the signal transmission area, and the third functional layer is used to reduce near-infrared reflection.

11. The window glass according to any one of claims 1-5, characterized in that, The vehicle window glass further comprises a third functional layer, the third functional layer being connected to the inner glass plate and being located on a side of the inner glass plate away from the intermediate layer, and a projection of the third functional layer on the glass body along a thickness direction of the glass body at least covering the signal transmission area; When the vehicle window glass is mounted on a vehicle body sheet metal, the transmittance of near infrared rays with a wavelength in the range of 800nm ​​to 1600nm in the signal transmission area of ​​the vehicle window glass is greater than or equal to 80%.

12. The window glass according to any one of claims 1-5, characterized in that, The vertical transmittance of near infrared rays with a wavelength in the range of 800nm ​​to 1600nm on the outer glass plate is greater than 90%; and / or, The vertical transmittance of near infrared rays with a wavelength in the range of 800nm ​​to 1600nm on the inner glass plate is greater than 90%.

13. A vehicle, characterized in that, The vehicle comprises a body sheet metal and a vehicle window glass as claimed in any one of claims 1 to 12, wherein the vehicle window glass is mounted on the body sheet metal.

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