Vehicle window glass and vehicle

Abstract

The application relates to a vehicle window glass and a vehicle. The vehicle window glass comprises a glass body and a blue light absorption layer. The glass body has a signal transmission area for signals of an optical sensor to pass through, and the blue light absorption layer is arranged on a first area of the glass body, and the first area covers the signal transmission area. The vehicle window glass can absorb blue light in visible light, i.e. filter out the blue light spectrum in visible light which is useless to the optical sensor, and retain the useful spectrum, so that the performance of the optical sensor can be improved.

Description

Technical Field

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

[0002] Advanced Driving Assistance Systems (ADAS) utilize various optical sensors installed in vehicles (millimeter-wave radar, lidar, mono / dual-lens cameras, and satellite navigation, etc.) to continuously sense the surrounding environment while the vehicle is in motion, collect data, identify, detect, and track static and dynamic objects, and combine this data with navigation map data to perform system calculations and analyses. This allows the driver to anticipate potential dangers and effectively increases driving comfort and safety.

[0003] As fundamental sensing devices for vehicles, single / dual-lens cameras are increasingly used on windshields. A weakness of cameras is that their recognition capabilities are greatly affected by external factors. Key parameters affecting camera performance include detection distance, resolution, and field of view (FoV). Especially for cameras mounted on vehicle windows, in addition to being affected by external environmental factors (such as rain, snow, fog, dust, and haze), they are also closely related to the camera's installation angle, installation position, and glass type (original film assembly, printed patterns, etc.). When selecting cameras for ADAS vehicles, the requirements for the optical properties of the windshield are becoming increasingly stringent. Summary of the Invention

[0004] Therefore, it is necessary to overcome the shortcomings of existing technologies and provide a car window glass and vehicle that can improve the performance of optical sensors.

[0005] This application provides a vehicle window glass, the vehicle window glass comprising:

[0006] A glass body having a signal transmission zone for signals from an optical sensor to pass through;

[0007] A blue light absorption layer is disposed on a first region on the glass body, and the first region covers the signal transmission region.

[0008] In one embodiment, the window glass further includes a light-blocking layer; the light-blocking layer is disposed in a second region of the glass body, and the second region does not overlap with the signal transmission region.

[0009] In one embodiment, the visible light transmittance of the glass body is greater than or equal to 70%, and the visible light transmittance of the light blocking layer is less than or equal to 10%.

[0010] In one embodiment, the glass body includes a first glass plate, an adhesive layer and a second glass plate stacked sequentially. The first glass plate has a first surface and a second surface disposed opposite to each other. The second glass plate has a third surface and a fourth surface disposed opposite to each other. The second surface and the third surface are disposed opposite to each other. The adhesive layer is disposed between the second surface and the third surface.

[0011] The blue light absorbing layer is disposed on the second surface, the third surface, or the fourth surface.

[0012] In one embodiment, the light-blocking layer is disposed on the second surface or the fourth surface;

[0013] The first region and the second region are provided with a first overlapping region. The first overlapping region is arranged circumferentially around the signal transmission region. The spacing of the first overlapping region along the direction parallel to the surface of the glass body is set as M, where M≥1mm.

[0014] In one embodiment, the light blocking layer includes a first light blocking layer disposed on the second surface and a second light blocking layer disposed on the fourth surface; the first light blocking layer and the second light blocking layer have non-overlapping regions in a direction perpendicular to the surface of the glass body, the non-overlapping regions being staggered regions, and the spacing between the staggered regions in a direction parallel to the surface of the glass body is set as N, where N≥2mm.

[0015] In one embodiment, the thickness of the blue light absorbing layer is 3μm-15μm.

[0016] In one embodiment, the material of the blue light absorbing layer comprises silicates, blue light absorbers, and alcohol solvents.

[0017] In one embodiment, the silicate comprises 15-35 parts by mass, the alcohol solvent comprises 30-50 parts by mass, and the blue light absorber comprises 5-15 parts by mass.

[0018] In one embodiment, the silicate includes at least one of methyl orthosilicate, ethyl orthosilicate, trimethoxysilane, triethoxysilane, and dimethyldimethoxysilane; and / or the alcohol solvent is selected from at least one of methanol, ethanol, and propanol; and / or the blue light absorber is selected from at least one of azo blue light absorbers, isoindolinone blue light absorbers, benzimidazolone blue light absorbers, and organic-inorganic composite blue light absorbers.

[0019] In one embodiment, the visible light transmittance of the blue light absorbing layer in the 440nm-480nm band is less than or equal to 40%, and the visible light transmittance of the blue light absorbing layer in the 480nm-780nm band is greater than or equal to 70%.

[0020] In one embodiment, when the installation angle of the glass body relative to the horizontal plane is 20°-46°, the red light ratio RR of the signal transmission area is greater than or equal to 0.84.

[0021] This application also provides a vehicle, the vehicle including the window glass as described above, and an optical sensor located inside the vehicle, the optical sensor being disposed opposite to the signal transmission area.

[0022] In one embodiment, the optical sensor is a lidar, an infrared camera, or a visible light camera.

[0023] The aforementioned car window glass and vehicles have a blue light absorption layer on the first area of ​​the glass body. The first area with the blue light absorption layer at least completely covers the signal transmission area. The blue light absorption layer can absorb blue light in visible light, that is, filter out the blue light spectrum in visible light that is not useful to the optical sensor, and retain the useful spectrum, thereby improving the performance of the optical sensor. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a vehicle window glass according to an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the structure of a vehicle window glass according to another embodiment of this application.

[0026] Figure 3 This is a schematic diagram of the structure of a vehicle window glass according to another embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the structure of a vehicle window glass according to another embodiment of this application.

[0028] Figure 5 This is an optical curve of a vehicle window glass according to an embodiment of this application.

[0029] 10. Window glass; 11. Glass body; 111. First glass plate; 1111. First surface; 1112. Second surface; 112. Adhesive layer; 113. Second glass plate; 1131. Third surface; 1132. Fourth surface; 12. Blue light absorption layer; 13. Light blocking layer; 131. First light blocking layer; 132. Second light blocking layer; 20. Optical sensor. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In related technologies, automotive optical sensors, especially cameras, control the resolution / clarity of red light imaging based on indicators such as transmittance, red light ratio (RR), and P / S polarization ratio. To improve the resolution of red light imaging by cameras, besides uncontrollable external factors, it's crucial to minimize other influencing factors. This necessitates a series of requirements for the optical properties of automotive window glass: spectral characteristics at different angles β (β being the installation angle of the window glass relative to the horizontal plane), including but not limited to transmittance, red light ratio (RR), and P / S polarization ratio, must all meet preset requirements. The formula for red light ratio (RR) is: RR = T r / T, T r Here, T represents the red light transmittance in the 600nm-700nm wavelength range, and T represents the total transmittance in the 440nm-700nm wavelength range. Research has shown that increasing the red light transmittance (RR) value improves the clarity / resolution of the camera's red light imaging. Specifically, when T... r Under certain conditions, appropriately reducing the T value can increase the RR value, thereby further meeting the requirements for the clarity of red light imaging in cameras.

[0032] It should be noted that visible light generally refers to electromagnetic waves with wavelengths ranging from 380nm to 780nm. Blue light, in particular, has wavelengths ranging from 400nm to 500nm.

[0033] Based on this, this application provides a car window glass and vehicle, in which a blue light absorption layer is provided at the signal transmission area of ​​the glass corresponding to the optical sensor. The main function of the blue light absorption layer is to absorb unnecessary blue light in the 440nm-480nm band of visible light, thereby reducing the T value and increasing the RR value, thereby improving the clarity of red light imaging of the camera and thus improving the performance of the camera.

[0034] See Figure 1 or Figure 2 , Figure 1 and Figure 2The diagram illustrates the structure of a vehicle window glass 10 according to two different embodiments of this application. One embodiment of this application provides a vehicle window glass 10, which includes a glass body 11 and a blue light absorbing layer 12. The glass body 11 has a signal transmission area for signals from an optical sensor 20 to pass through. The blue light absorbing layer 12 is disposed in a first area on the glass body 11, and the first area at least completely covers the signal transmission area along a direction perpendicular to the surface of the glass body. The signal transmission area refers to the area on the glass body 11 where the optical sensor 20 transmits signals after being assembled with the vehicle window glass 10. That is, as shown... Figure 1 The area between letters A and B in the diagram represents the signal transmission area, which is the region on the glass body 11 corresponding to the field of view (FOV) of the optical sensor 20. When any of the following is adjusted: the field of view (FOV) of the optical sensor 20, the distance between the optical sensor 20 and the glass body 11, or the mounting angle β of the glass body 11 relative to the horizontal plane, the size, shape, and position of the signal transmission area will be adjusted accordingly. Generally, after the optical sensor 20 and the window glass 10 are assembled onto the vehicle, the field of view (FOV) of the optical sensor 20, the distance between the optical sensor 20 and the glass body 11, and the mounting angle β of the glass body 11 relative to the horizontal plane will not be significantly adjusted, allowing adjustments within a preset range to ensure that the blue light absorption layer 12 completely covers the signal transmission area.

[0035] The aforementioned car window glass 10 has a blue light absorption layer 12 on the first region of the glass body 11. The first region completely covers the signal transmission region. The blue light absorption layer 12 can absorb blue light in visible light, that is, filter out the blue light spectrum in visible light that is not useful to the optical sensor 20, and retain the useful spectrum, thereby improving the performance of the optical sensor 20.

[0036] It should be noted that the signal transmission area includes, but is not limited to, trapezoidal, circular, elliptical, polygonal, or other regular or irregular shapes, which can be flexibly adjusted and set according to actual needs.

[0037] It should be noted that the specific shape, size, and location of the first zone can be flexibly adjusted and set according to actual needs, as long as it can cover the signal transmission area.

[0038] Please see Figure 1 or Figure 2In one embodiment, the vehicle window glass 10 further includes a light-blocking layer 13. The light-blocking layer 13 is disposed in a second region of the glass body 11, the second region not overlapping the first region at least partially, and the second region not overlapping the signal transmission region. That is, the second region not overlapping the first region at least partially, and the portion of the first region that does not overlap with the second region covers the signal transmission region. In addition, the portion of the first region that does not overlap with the second region, i.e., does not have the light-blocking layer 13, but has a blue light absorption layer 12. Thus, the blue light spectrum in the visible light at the portion of the first region that does not overlap with the second region, which is useless to the optical sensor 20, is filtered and absorbed accordingly. The visible light with the blue light spectrum filtered out is located in the signal transmission region and can be received by the optical sensor 20 accordingly, thus ensuring the performance of the optical sensor 20.

[0039] The phrase "the second region and the first region do not overlap at least partially" means that the second region and the first region have a partial overlap and a partial non-overlap; or, the second region and the first region do not overlap at all.

[0040] In one embodiment, the visible light transmittance of the glass body 11 is greater than or equal to 70%. The visible light transmittance of the light-blocking layer 13 is less than or equal to 10%, preferably less than or equal to 5%, more preferably less than or equal to 3%, even more preferably less than or equal to 1%, or even less than or equal to 0.5%, or essentially 0%, meaning it is opaque to visible light. Thus, the light-blocking layer 13 serves to block light. In other words, the light-blocking layer 13 can be used to shield and protect the components inside the vehicle. On the one hand, the light-blocking layer 13 can shield the components inside the vehicle to ensure the overall aesthetics when viewed from the outside; on the other hand, the light-blocking layer 13 can also provide UV protection, preventing the components inside the vehicle from being damaged by direct sunlight and thus extending their service life.

[0041] It should be noted that vehicle windows include, but are not limited to, windshields, rear windows, side windows, corner windows, and sunroofs.

[0042] Please see Figure 1 and Figure 2In some embodiments, the glass body 11 is laminated glass, comprising a first glass plate 111, an adhesive layer 112, and a second glass plate 113 stacked sequentially. The first glass plate 111 has a first surface 1111 and a second surface 1112 facing away from each other, and the second glass plate 113 has a third surface 1131 and a fourth surface 1132 facing away from each other. The first surface 1111 faces outwards from the vehicle, and the fourth surface 1132 faces inwards from the vehicle. The second surface 1112 and the third surface 1131 are positioned opposite each other. A blue light absorbing layer 12 is disposed on the second surface 1112, the third surface 1131, or the fourth surface 1132. Preferably, the blue light absorbing layer 12 is disposed on the second surface 1112 or the third surface 1131. Thus, when the blue light absorbing layer 12 is arranged on the second surface 1112 or the third surface 1131, since it is located inside the glass body 11, the blue light absorbing coating 12 is more resistant to aging than when it is arranged on the fourth surface 1132, thereby extending its service life; in addition, it is less prone to dust accumulation, more resistant to dirt, less easily contaminated, and easier to clean the car window glass 10.

[0043] The first glass plate 111 is transparent or tinted glass, with a thickness of 0.7mm-4mm and a visible light transmittance greater than 70%. The second glass plate 113 is also transparent or tinted glass, with a thickness of 0.7mm-4mm and a visible light transmittance greater than 70%. 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%-95%; the total iron content (calculated as Fe2O3) of the tinted glass is 0.1% to 0.8%, even 0.1% to 0.5%, and the visible light transmittance of the tinted glass is 75%-90%. For example, the first glass plate 111 can be a 2.1mm thick transparent glass with a visible light transmittance of 89%, and the second glass plate 113 can be a 1.6mm thick green glass with a visible light transmittance of 83%, or a 2.1mm thick green glass with a visible light transmittance of 80%.

[0044] The adhesive layer 112 is a transparent or colored thermoplastic polymer film, and its thickness is 0.38 mm to 2.28 mm. For example, the thickness of the adhesive layer 112 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 (SGP). When the adhesive layer 112 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 112 can be, but is not limited to, 80%, 85%, 90%, or 95%. When the adhesive layer 112 is a colored thermoplastic polymer film, the visible light transmittance of the colored thermoplastic polymer film is greater than 70%. For example, the visible light transmittance of the adhesive layer 112 can be, but is not limited to, 75%, 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.

[0045] It should be noted that in some other embodiments, the glass body 11 may also be a single piece of glass, having opposing inner and outer surfaces, with the blue light absorbing layer 12 disposed on either the inner or outer surface of the glass body 11. Preferably, the blue light absorbing layer 12 is disposed on the inner surface of the glass body 11. The inner surface faces the interior of the vehicle, and the outer surface faces the exterior of the vehicle.

[0046] The light-blocking layer 13 is typically formed by surrounding the second surface 1112 with ceramic ink or ultraviolet ink through screen printing, inkjet printing, or other methods. After curing or high-temperature sintering, the light-blocking layer 13 is formed around the perimeter of the second surface 1112. It is understood that the light-blocking layer 13 may also be located only on the third surface 1131, or only on the fourth surface 1132, or simultaneously on the second and fourth surfaces 1112, or simultaneously on the second and third surfaces 1131, or simultaneously on the third and fourth surfaces 1132, or simultaneously on the second, third, and fourth surfaces 1132. The color of the light-blocking layer 13 is typically dark, including but not limited to black, brown, and tan, to achieve a masking effect.

[0047] In other embodiments, the light-blocking layer 13 may also be a dark polymer film or a dimming element. The dark polymer film may be a bulk-colored polymer film, made of thermoplastic resins such as polyvinyl butyral (PVB), polyethylene terephthalate (PET), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), thermoplastic polyurethane elastomer (TPU), polyolefin elastomer (POE), polyurethane (PU), or ionomer polymer film (SGP), preferably PET or PVB. For example, bulk coloring is achieved by adding coloring components during the polymer film manufacturing process, resulting in black or brown polymer films. The dark polymer film may also be a polymer film with surface-printed pigments, such as printing black or brown pigments or paints onto the surface of the polymer film. The dimming element may be a polymer-dispersed liquid crystal film (PDLC), suspended particle film (SPD), electrochromic film (EC), dye liquid crystal film (LC), etc. The minimum visible light transmittance of the dimming element is less than or equal to 5%, for example, 3%, 2%, 1%, 0.5%, or 0%. The maximum visible light transmittance of the dimming element can be set as needed, such as 10%, 20%, 30%, 50%, 70%, 80%, etc. Specifically, the visible light transmittance of the dimming element can be adjusted between 0% and 20%, between 0.5% and 50%, or between 0% and 70%, etc., to meet the visible light transmittance requirements in various scenarios.

[0048] It should be noted that the second region, namely the light-blocking layer 13, is located on the glass body 11 in various positions, including but not limited to its periphery, center, or any other location. Furthermore, the specific size and shape of the second region can be flexibly adjusted and set according to actual needs.

[0049] In one embodiment, the glass body has a signal transmission area and a non-signal transmission area, which do not overlap. The non-signal transmission area includes a second area and a field of view area. The signal transmission area corresponds to the position of the in-vehicle optical sensor 20. The second area is located at the periphery of the glass body 10. The field of view area is a light-transmitting area used for light transmission between the vehicle interior and exterior, i.e., the vehicle window. In some other embodiments, the field of view area may also be partially used for a head-up display (HUD), i.e., as the HUD field of view area to display information such as driving speed, dynamic navigation, and business district information. The second area has a light-blocking layer 13 to prevent visible light from passing through the glass body. In some other embodiments, the second area may also be used solely for aesthetic purposes. This application does not strictly limit the use of the non-signal transmission area. In one embodiment, the signal transmission area, the second area, and the field of view area do not overlap.

[0050] Please see Figure 1 or Figure 2 , Figure 1 and Figure 2 The diagrams shown are cross-sectional views of the glass body 11 in the surrounding area; cross-sectional views of other areas are not shown. This surrounding area is located near the vehicle roof of the glass body 1. Please refer to the diagrams again. Figure 1 and Figure 2 , Figure 1 The light-blocking layer 13 is only disposed on the fourth surface. Figure 2 The light-blocking layer 13 is only disposed on the second surface. Figure 1 and Figure 2 The first region completely covers the signal transmission region, and the first region and the second region have a first overlapping region, that is, the blue light absorption layer 12 and the light blocking layer 13 overlap in the direction perpendicular to the surface of the glass body 11, and the overlapping part is the first overlapping region. The first overlapping region is arranged circumferentially around the signal transmission region, and the spacing of the first overlapping region in the direction parallel to the surface of the glass body 11 is set as M, where M≥1mm.

[0051] Please see Figure 3 and Figure 4 , Figure 3 and Figure 4 Structural diagrams of the vehicle window glass 10 according to two other different embodiments are shown. In one embodiment, the light blocking layer 13 includes a first light blocking layer 131 disposed on a second surface 1112 and a second light blocking layer 132 disposed on a fourth surface 1132. Thus, the combined effect of the first light blocking layer 131 and the second light blocking layer 132 can improve the shading effect around the glass body 11.

[0052] In some embodiments, due to processing errors and assembly errors, it is impossible to make the size, shape and position of the first light blocking layer 131 and the second light blocking layer 132 completely the same, which can easily lead to the appearance of the first light blocking layer 131 and the second light blocking layer 132 being different.

[0053] Please see Figure 3 and Figure 4 In some embodiments, the first light-blocking layer 131 and the second light-blocking layer 132 have non-overlapping portions in a direction perpendicular to the surface of the glass body 11; these non-overlapping portions are also known as staggered regions. The staggered regions are arranged circumferentially around the signal transmission area, and the spacing between the staggered regions in a direction parallel to the surface of the glass body 11 is set to N, where N ≥ 2 mm. This effectively avoids visual discrepancies between the first light-blocking layer 131 and the second light-blocking layer 132.

[0054] Please see Figure 3In some specific embodiments, the second light-blocking layer 132 covers the first light-blocking layer 131 in a direction perpendicular to the surface of the glass body 11; the first light-blocking layer 131 and the blue light-absorbing layer 12 overlap in a direction perpendicular to the surface of the glass body 11, and the spacing between the overlapping portions in a direction parallel to the surface of the glass body 11 is also M. Conversely, please refer to [the relevant documentation]. Figure 4 The first light blocking layer 131 covers the second light blocking layer 132 in a direction perpendicular to the surface of the glass body 11; the second light blocking layer 132 and the blue light absorbing layer 12 overlap in a direction perpendicular to the surface of the glass body 11, and the distance between the overlapping parts in a direction parallel to the surface of the glass body 11 is also M.

[0055] In some embodiments, the blue light absorbing layer 12 may be a coating or film, including but not limited to being formed on the glass body 11 by various processes such as spraying, screen printing, 3D printing, hot pressing, etc.

[0056] In one embodiment, the blue light absorbing layer 12 is made of silicate, a blue light absorber, and an alcohol solvent. Specifically, by weight, the silicate comprises 15-35 parts, the alcohol solvent comprises 30-50 parts, and the blue light absorber comprises 5-15 parts. Preferably, by mass percentage, the silicate comprises 15%-35%, the alcohol solvent comprises 30%-50%, and the blue light absorber comprises 5%-15%.

[0057] As an example, silicates include, but are not limited to, at least one of methyl orthosilicate, ethyl orthosilicate, trimethoxysilane, triethoxysilane, and dimethyldimethoxysilane.

[0058] As an example, alcohol solvents include, but are not limited to, at least one of methanol, ethanol, and propanol.

[0059] As an example, blue light absorbers include, but are not limited to, at least one of azo blue light absorbers, isoyindolinone blue light absorbers, benzimidazolone blue light absorbers, and organic-inorganic composite blue light absorbers.

[0060] In one embodiment, the blue light absorbing layer 12 is a blue light absorbing coating; the thickness of the blue light absorbing layer 12 is 3μm-15μm. Specifically, the thickness of the blue light absorbing layer 12 is, for example, 3μm, 5μm, 10μm, 13μm, 15μm, etc. The thickness affects the absorption performance of the blue light absorbing coating. If the thickness is too large, it will affect the uniformity of the coating thickness, thereby affecting the coating's absorption performance of blue light. If the thickness is too small, it may reduce the content of blue light absorber in the coating, thereby affecting the coating's absorption performance of blue light.

[0061] In one embodiment, the blue light absorption layer 12 has a visible light transmittance of less than or equal to 40% in the 440nm-480nm wavelength band and a visible light transmittance of greater than or equal to 70% in the 480nm-780nm wavelength band. Thus, the blue light absorption layer 12 has an absorption effect of more than 60% for visible light in the 440nm-480nm wavelength band, i.e., blue light, thereby achieving low blue light transmittance and improving the performance of the optical sensor 20. Furthermore, the blue light absorption layer 12 hardly absorbs any visible light in the 480nm-780nm wavelength band, with a transmittance of greater than or equal to 70%, thus not affecting the transparency and light-gathering effects.

[0062] In some embodiments, the visible light transmittance of the blue light absorbing layer 12 in the 440nm-480nm wavelength band is, for example, 40%, 35%, 30%, 25%, 20%, 15%, 10%, 5%, or 0%. Thus, the lower the visible light transmittance in the 440nm-480nm wavelength band, the stronger the absorption effect of blue light; conversely, the higher the visible light transmittance in the 440nm-480nm wavelength band, the weaker the absorption effect of blue light.

[0063] In some embodiments, the visible light transmittance of the blue light absorbing layer 12 in the 480nm-780nm wavelength band is, for example, 70%, 75%, 80%, 85%, 90%, 95%, or 99%. Thus, the higher the visible light transmittance in the 480nm-780nm wavelength band, the stronger the light transmission and illumination effect; conversely, the lower the visible light transmittance in the 480nm-780nm wavelength band, the weaker the light transmission and illumination effect.

[0064] In one embodiment, when the mounting angle β of the glass body 11 relative to the horizontal plane is between 20° and 46°, the red light ratio RR in the signal transmission area is greater than or equal to 0.84. Specifically, the red light ratio RR is 0.84, 0.85, 0.86, 0.87, 0.88, 0.89, 0.9, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, etc. The larger the red light ratio RR in the signal transmission area, the higher the imaging clarity of the sensor.

[0065] Please see Figure 5 , Figure 5 The optical profiles of a vehicle window glass 10 according to an embodiment of this application and a comparative example are shown. Figure 5 The dashed curve illustrates the optical curve of the vehicle window glass 10 according to an embodiment of this application. Due to the presence of the blue light absorption layer 12, the visible light transmittance in the signal transmission region in the 440nm-480nm wavelength band is measured to be less than 30%, specifically, for example, 28%. Furthermore, as a comparative example, Figure 5The solid line curve represents the optical curve of the car window glass 10 without the blue light absorption layer 12. Since there is no blue light absorption layer 12, the visible light transmittance in the signal transmission area in the 440nm-780nm band is greater than 70%, specifically 90%.

[0066] Please see Figure 1 In one embodiment, a vehicle is included, but is not limited to, a car, jeep, bus, coach, truck, airplane, train, taxi, or coach. The vehicle includes the window glass 10 of any of the above embodiments, and also includes an optical sensor 20 located inside the vehicle, with the optical sensor 20 corresponding to a signal transmission area. The optical sensor 20 can be a lidar, infrared camera, or visible light camera.

[0067] The aforementioned vehicle has a blue light absorption layer 12 on the first region of the glass body 11. The first region covers the signal transmission region. The blue light absorption layer 12 can absorb blue light in visible light, that is, filter out the blue light spectrum in visible light that is not useful to the optical sensor 20, and retain the useful spectrum, thereby improving the performance of the optical sensor 20.

[0068] In the description of this application, it should be understood that the terms "thickness", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0069] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0070] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A type of vehicle window glass, characterized in that, The vehicle window glass includes: A glass body having a signal transmission region for the passage of signals from an optical sensor; and A blue light absorption layer has a visible light transmittance of less than or equal to 40% in the 440nm-480nm wavelength band and a visible light transmittance of greater than or equal to 70% in the 480nm-780nm wavelength band. The blue light absorption layer is disposed in a first region on the glass body, and the first region covers the signal transmission region to improve the clarity of red light imaging of the camera.

2. The vehicle window glass according to claim 1, characterized in that, The vehicle window glass also includes a light blocking layer; the light blocking layer is disposed in the second region of the glass body, and the second region does not overlap with the signal transmission region.

3. The vehicle window glass according to claim 2, characterized in that, The visible light transmittance of the glass body is greater than or equal to 70%, and the visible light transmittance of the light blocking layer is less than or equal to 10%.

4. The vehicle window glass according to claim 2, characterized in that, The glass body includes a first glass plate, an adhesive layer and a second glass plate stacked in sequence. The first glass plate has a first surface and a second surface that are opposite to each other. The second glass plate has a third surface and a fourth surface that are opposite to each other. The second surface and the third surface are opposite to each other. The adhesive layer is disposed between the second surface and the third surface. The blue light absorbing layer is disposed on the second surface, the third surface, or the fourth surface.

5. The vehicle window glass according to claim 4, characterized in that, The light-blocking layer is disposed on the second surface or the fourth surface; The first region and the second region are provided with a first overlapping region. The first overlapping region is arranged circumferentially around the signal transmission region. The spacing of the first overlapping region along the direction parallel to the surface of the glass body is set as M, where M≥1mm.

6. The vehicle window glass according to claim 4, characterized in that, The light blocking layer includes a first light blocking layer disposed on the second surface and a second light blocking layer disposed on the fourth surface; the first light blocking layer and the second light blocking layer have non-overlapping regions in the direction perpendicular to the surface of the glass body, the non-overlapping regions being staggered regions, and the spacing between the staggered regions in the direction parallel to the surface of the glass body is set as N, where N≥2mm.

7. The vehicle window glass according to claim 1, characterized in that, The thickness of the blue light absorption layer is 3μm-15μm.

8. The vehicle window glass according to claim 1, characterized in that, The material of the blue light absorbing layer includes silicates, blue light absorbers, and alcohol solvents.

9. The vehicle window glass according to claim 8, characterized in that, By mass fraction, the silicate comprises 15-35 parts, the alcohol solvent comprises 30-50 parts, and the blue light absorber comprises 5-15 parts.

10. The vehicle window glass according to claim 9, characterized in that, The silicate includes at least one of methyl orthosilicate, ethyl orthosilicate, trimethoxysilane, triethoxysilane, and dimethyldimethoxysilane; and / or the alcohol solvent is selected from at least one of methanol, ethanol, and propanol; and / or the blue light absorber is selected from at least one of azo blue light absorbers, isoindolinone blue light absorbers, benzimidazolone blue light absorbers, and organic-inorganic composite blue light absorbers.

11. The vehicle window glass according to any one of claims 1 to 10, characterized in that, When the installation angle of the glass body relative to the horizontal plane is 20°-46°, the red light ratio RR of the signal transmission area is greater than or equal to 0.

84.

12. A vehicle, characterized in that, The vehicle includes a window glass as described in any one of claims 1 to 11, and further includes an optical sensor located inside the vehicle, the optical sensor being disposed opposite to the signal transmission area.

13. The vehicle according to claim 12, characterized in that, The optical sensors are lidar, infrared cameras, and visible light cameras.

Images