Car window glass, its manufacturing method, and vehicle

Abstract

This application provides a vehicle window glass, a manufacturing method thereof, and a vehicle. The vehicle window glass includes a glass substrate and a transparent nanofilm. The glass substrate has an outer surface and an inner surface arranged opposite each other. The transparent nanofilm is arranged on the inner surface. The transparent nanofilm includes a standard high refractive index layer, a reinforced high refractive index layer, and an outermost low refractive index layer. The standard high refractive index layer, the reinforced high refractive index layer, and the outermost low refractive index layer are sequentially stacked in a direction away from the inner surface. The refractive index of the standard high refractive index layer is 1.61 to 2.59, the refractive index of the reinforced high refractive index layer is 2.6 or more, and the refractive index of the outermost low refractive index layer is 1.35 to 1.60. The technical solution of this application can simultaneously meet both the transmittance requirements for lidar signals and the reflectance requirements for head-up display systems.

Description

[Technical Field]

[0001] This application claims priority from Chinese Patent Application No. 202211256693.1, filed on October 14, 2022, for the invention entitled "Car window glass, its manufacturing method, and vehicle," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the glass technology field, in particular to vehicle window glass and its manufacturing method, as well as to vehicles. [Background technology]

[0003] As vehicles become smarter, head-up display (HUD) systems are increasingly being adopted in vehicles. HUD systems display important driving information, such as speed, engine RPM, fuel economy, tire pressure, and navigation, as well as information from external smart devices, in real time within the driver's field of vision. This allows drivers to read information from the dashboard and other devices without lowering their heads, avoiding distraction from the road ahead. At the same time, drivers no longer need to adjust their gaze between the distant road and the nearby dashboard, preventing eye strain and significantly improving driving safety and the driving experience.

[0004] Furthermore, with the explosive growth in demand for autonomous driving in recent years, LiDAR is increasingly being applied to vehicles. When LiDAR is installed on the exterior of a vehicle, such as on a roof, its stability and accuracy may be affected by various weather conditions and vibrations during driving. Therefore, solutions in which LiDAR is installed inside the vehicle are becoming more common. In this case, the LiDAR's detection beam must pass through the vehicle window glass. However, in order to meet the demand for thermal insulation, existing vehicle window glass has low infrared transmittance. As a result, existing vehicle window glass cannot directly meet the demand for high-precision detection by LiDAR.

[0005] In order to clearly display the HUD image of a head-up display system without ghosting, the car window glass is required to have a high reflectivity for the projected light. Currently, it is difficult for existing car window glass to simultaneously satisfy both the requirement of high transmittance for lidar signals and the requirement of high reflectivity for the head-up display system.

[0006] The embodiments of the present application provide a vehicle window glass, a manufacturing method thereof, and a vehicle, which can simultaneously meet both the transmittance requirements for radar signals and the reflectance requirements for head-up display systems.

[0007] In a first aspect, the present application provides a vehicle window glass. The vehicle window glass includes a glass substrate and a transparent nanofilm. The glass substrate has an outer surface and an inner surface that are arranged opposite each other. The transparent nanofilm is arranged on the inner surface. The transparent nanofilm includes a standard high refractive index layer, an enhanced high refractive index layer, and an outermost low refractive index layer. In a direction away from the inner surface, the standard high refractive index layer, the enhanced high refractive index layer, and the outermost low refractive index layer are sequentially stacked. The refractive index of the standard high refractive index layer is 1.61 to 2.59, the refractive index of the reinforced high refractive index layer is 2.6 or more, and the refractive index of the outermost low refractive index layer is 1.35 to 1.60.

[0008] As can be seen, when the refractive index of the reinforced high-refractive index layer is 2.6 or higher, the car window on which the transparent nanofilm is installed can have a relatively high transmittance to LIDAR signals, and the surface of the car window facing the interior of the car also has a relatively high reflectance to the projected light of the head-up display system. LIDAR and head-up display systems can be integrated and used together with the car window, thereby providing better driver assistance to the vehicle.

[0009] In one possible embodiment, the car window glass has a transmittance of 80% or more for P-polarized light having a wavelength of 850 nm to 1650 nm and incident at an incident angle of 50° to 73°.

[0010] In one possible embodiment, the car window glass has a reflectance of 20% or more for P-polarized light having a wavelength of 380 nm to 780 nm and incident at an incident angle of 45° to 85° from the inside of the car.

[0011] In one possible embodiment, the thickness of the standard high refractive index layer is between 5 nm and 55 nm.

[0012] In one possible embodiment, the thickness of the enhanced high refractive index layer is between 35 nm and 70 nm.

[0013] In one possible embodiment, the thickness of the outermost low refractive index layer is 80 nm to 130 nm.

[0014] In one possible embodiment, the enhanced high refractive index layer is TiO x layer, and TiO x The rutile structure of TiO x The proportion of is at least 90%.

[0015] In one possible embodiment, TiO x The refractive index n of the layer is 2.60 to 2.72, and TiO x The extinction coefficient k of the layer satisfies k≧0.0015.

[0016] In one possible embodiment, the glass substrate includes an outer glass sheet, an inner glass sheet, and an intermediate layer provided between the outer glass sheet and the inner glass sheet. The surface of the outer glass sheet that is farther from the intermediate layer is the outer surface. The surface of the inner glass sheet that is farther from the intermediate layer is the inner surface. The outer glass sheet and / or the inner glass sheet have a transmittance of 91% or more for near-infrared light with a wavelength of 850 nm to 1650 nm.

[0017] In one possible embodiment, the transparent nanofilm only includes a standard high refractive index layer, an enhanced high refractive index layer, and an outermost low refractive index layer, the standard high refractive index layer having a thickness of 5 nm to 35 nm, the enhanced high refractive index layer having a thickness of 45 nm to 65 nm, and the outermost low refractive index layer having a thickness of 90 nm to 120 nm.

[0018] In one possible embodiment, the transparent nanofilm further comprises at least one laminate structure, the at least one laminate structure being disposed between the standard high refractive index layer and the inner glass plate. Each laminate structure comprises a high refractive index layer and a low refractive index layer stacked in sequence. The refractive index of the high refractive index layer is between 1.61 and 2.59, and the refractive index of the low refractive index layer is between 1.35 and 1.60.

[0019] In one possible embodiment, the number of laminated structures is one. A high refractive index layer is provided on the surface of the inner glass plate away from the intermediate layer. A low refractive index layer is provided between the high refractive index layer and the standard high refractive index layer. The thickness of the high refractive index layer is 2 nm to 180 nm. The thickness of the low refractive index layer is 30 nm to 85 nm. The thickness of the standard high refractive index layer is 5 nm to 55 nm. The thickness of the reinforced high refractive index layer is 45 nm to 65 nm. The thickness of the outermost low refractive index layer is 85 nm to 130 nm.

[0020] In one possible embodiment, there are two laminate structures, each designated a first laminate structure and a second laminate structure. The first laminate structure includes a first high refractive index layer and a first low refractive index layer. The second laminate structure includes a second high refractive index layer and a second low refractive index layer. The first high refractive index layer, the first low refractive index layer, the second high refractive index layer, the second low refractive index layer, the standard high refractive index layer, the reinforced high refractive index layer, and the outermost low refractive index layer are sequentially laminated on the surface of the inner glass plate away from the intermediate layer. The thickness of the first high refractive index layer is 140 nm to 190 nm. The thickness of the first low refractive index layer is 5 nm to 95 nm. The thickness of the second high refractive index layer is 130 nm to 205 nm. The thickness of the second low refractive index layer is 25 nm to 90 nm. The thickness of the standard high refractive index layer is 5 nm to 45 nm. The thickness of the reinforced high refractive index layer is 45 nm to 60 nm. The thickness of the outermost low refractive index layer is 80 nm to 105 nm.

[0021] In one possible embodiment, the wedge angle of the intermediate layer is equal to 0 or between 0.01 mrad and 0.15 mrad.

[0022] In one possible embodiment, the intermediate layer is a colored intermediate layer having a visible light transmittance of 80% or more.

[0023] In one possible embodiment, the visible light transmittance of the car window glass is 70% or more, and the Lab value of the reflected color of the car window glass measured from the outer surface satisfies a<3, b<0.5.

[0024] In one possible embodiment, the car window glass has a range of reflectance of 3% or less for P-polarized light at wavelengths of 469 nm, 529 nm and 629 nm, incident from the interior of the car at an angle of incidence of 65°.

[0025] In a second aspect, the present application provides a vehicle. The vehicle includes a detection assembly, a projection assembly, and the vehicle window glass described above. The detection assembly and the projection assembly are provided on the side of the vehicle window glass where the transparent nanofilm is provided. The vehicle window glass includes a signal transmission area and / or a head-up display area. The detection assembly is configured to emit and / or receive detection light having a wavelength of 850 nm to 1650 nm. The detection light is configured to pass through the signal transmission area. The projection assembly is configured to emit projection light having a wavelength of 380 nm to 780 nm to the head-up display area. The detection light beam is incident on the signal transmission area at an incident angle of 50° to 73°, and at least 80% of the detection light beam is P-polarized. The projected light beam is incident on the head-up display area at an incident angle of 45° to 85°, and at least 90% of the projected light beam is P-polarized.

[0026] In a third aspect, the present application provides a method of manufacturing a vehicle glazing, the method comprising: providing an inner glass pane; Forming a transparent nanofilm on the surface of an inner glass plate, the transparent nanofilm including a standard high refractive index layer, a reinforced high refractive index layer, and an outermost low refractive index layer, the standard high refractive index layer, the reinforced high refractive index layer, and the outermost low refractive index layer being sequentially stacked in a direction away from the inner glass plate, the refractive index of the standard high refractive index layer being 1.61 to 2.59, the refractive index of the reinforced high refractive index layer being 2.6 or more, and the refractive index of the outermost low refractive index layer being 1.35 to 1.60; and laminating the inner glass sheet provided with the transparent nanofilm, the intermediate layer, and the outer glass sheet to form a vehicle window glass.

[0027] In one possible embodiment, forming a transparent nanofilm on the surface of the inner glass sheet comprises: Forming a standard high refractive index layer by magnetron sputtering, wherein a target material power source for magnetron sputtering to form the standard high refractive index layer is a medium frequency (MF) magnetron sputtering power source; forming an enhanced high refractive index layer by magnetron sputtering on a surface of the standard high refractive index layer away from the inner glass sheet, wherein a target material power source for magnetron sputtering to form the enhanced high refractive index layer is a high power impulse magnetron sputtering (HiPIMS) power source; forming an outermost low refractive index layer by magnetron sputtering on a surface of the enhanced high refractive index layer away from the standard high refractive index layer, wherein a target material power source for magnetron sputtering to form the outermost low refractive index layer is a medium frequency (MF) magnetron sputtering power source.

[0028] In one possible embodiment, the transparent nanofilm further comprises at least one laminate structure disposed between the standard high refractive index layer and the inner glass plate, each of the laminate structures comprising a high refractive index layer and a low refractive index layer stacked in sequence, the high refractive index layer having a refractive index of 1.61 to 2.59, and the low refractive index layer having a refractive index of 1.35 to 1.60. The high refractive index layer and the low refractive index layer are formed by magnetron sputtering, and the target material power supply for forming the high refractive index layer and the low refractive index layer by magnetron sputtering is a medium frequency (MF) magnetron sputtering power supply. [Brief explanation of the drawings]

[0029] In order to more clearly explain the technical solution of the present application, the drawings used in the embodiments are briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings from these drawings without creative efforts. [Figure 1]FIG. 1 is a schematic diagram showing the structure of a vehicle according to an embodiment of the present application. [Figure 2] FIG. 2 is a top view of the vehicle window glass shown in FIG. [Figure 3] FIG. 3 is a schematic diagram showing the structure of the car window glass shown in FIG. [Figure 4] FIG. 4 is a schematic diagram showing the structure of the glass substrate when the glass substrate shown in FIG. 3 is a laminated glass. [Figure 5] FIG. 5 is a schematic diagram showing the structure of the car window glass shown in FIG. 4 in a first possible embodiment. [Figure 6] FIG. 6 is a schematic diagram showing the structure of the car window glass shown in FIG. 4 in a second possible embodiment. [Figure 7] FIG. 7 is a graph of the spectral reflectance of the car window glass according to Example 4 for P-polarized light having a wavelength of 380 nm to 1600 nm and incident at an incident angle of 65°. [Figure 8] FIG. 8 is a schematic diagram showing the structure of the car window glass shown in FIG. 4 in a third possible embodiment. [Figure 9] FIG. 9 is a flowchart of a method for manufacturing a car window glass according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0030] To facilitate understanding, first, terms used in the embodiments of the present application will be explained.

[0031] Refractive index: The refractive index of transmitted light at a wavelength of 550 nm. The refractive index of each layer of the transparent nanofilm was measured after the transparent nanofilm was subjected to a high-temperature heat treatment of at least 560°C and bending.

[0032] Thickness: Physical thickness.

[0033] Extinction coefficient: A light absorption property of a medium, indicating the degree to which light intensity is reduced as it passes through a material.

[0034] Angle of incidence: The angle between the detection or projection ray and the normal to the surface at the point of incidence when the ray is incident on the car window glass.

[0035] Hereinafter, specific embodiments of the present application will be clearly described in conjunction with the drawings.

[0036] The embodiments of the present application provide a car window glass and a vehicle, which can simultaneously satisfy both the requirement of high transmittance for the detection light beam of the detection assembly and the requirement of high reflectance for the projection light beam of the projection assembly.

[0037] Referring to Fig. 1, Fig. 1 is a schematic diagram showing the structure of a vehicle 1000 according to an embodiment of the present application. The vehicle 1000 includes a vehicle body 100 and a vehicle window glass 200. The vehicle window glass 200 is connected to the vehicle body 100. The vehicle window glass 200 may be a windshield of the vehicle 1000.

[0038] Note that FIG. 1 is intended only to exemplify the connection relationship between the vehicle body 100 and the vehicle window glass 200, and is not intended to specifically limit the connection position, specific structure, or number of each device. The structure illustrated in the embodiment of the present application does not imply a specific limitation on the vehicle 1000. In other embodiments of the present application, the vehicle 1000 may include more or fewer components than those shown in the drawing, may combine certain components, may separate certain components, or may have a different component arrangement. The components shown in the drawing may be implemented as hardware, software, or a combination of software and hardware.

[0039] The vehicle 1000 further includes a detection assembly 10 and a projection assembly 20. The detection assembly 10 and the projection assembly 20 are mounted inside the vehicle 1000. The detection assembly 10 is configured to emit and / or receive a detection beam 11. The detection assembly 10 may be fixedly mounted to an inner surface of the vehicle window 200 or the vehicle body 100, for example, fixedly mounted to an inner surface of the vehicle roof. The projection assembly 20 is configured to emit a projection beam 21. The projection assembly 20 may be mounted proximate a bottom edge of the vehicle window 200, for example, mounted inside the vehicle dashboard. Alternatively, the projection assembly 20 may be mounted proximate an upper edge of the vehicle window 200, for example, mounted to an inner surface of the roof.

[0040] The detection assembly 10 is configured to emit detection light beams 11 outside the vehicle and / or receive detection light beams 11 incident from outside the vehicle into the vehicle interior. At least 80% of the detection light beams 11 are P-polarized. Illustratively, at least 90% of the detection light beams 11 may be P-polarized. Furthermore, 100% of the detection light beams 11 may be P-polarized (within an acceptable tolerance), i.e. Detection beam 11 is almost pure P-polarized light. As can be seen, the higher the proportion of P-polarized light in the detection light beam 11, the easier it is to increase the transmittance of the detection light beam 11 through the car window glass 200.

[0041] For example, the wavelength of the detection light beam 11 of the detection assembly 10 may be 850 nm to 1650 nm. The detection assembly 10 may include one or more types of LIDAR devices that emit and / or receive the detection light beam 11 with wavelengths of 850 nm, 905 nm, 1064 nm, or 1550 nm, and / or near-infrared cameras that emit and / or receive the detection light beam 11 with wavelengths of 850 nm to 1650 nm. The LIDAR devices can accurately sense three-dimensional information in the vehicle's external environment and detect and identify information such as the specific contours, distance, speed, and acceleration of obstacles such as pedestrians and other vehicles, thereby achieving positioning and odometry functions. The near-infrared cameras can capture and image the external environment. When the vehicle's autonomous driving level is upgraded to level 2.5 or above, and further to level 3, level 4, or level 5, the detection assembly 10 preferably employs multiple LIDAR devices and / or multiple near-infrared cameras. For example, a 905 nm LIDAR and a 1550 nm LIDAR are simultaneously employed in the detection assembly 10. Also, for example, a 940 nm near-infrared camera and a 1550 nm LIDAR are simultaneously employed in the detection assembly 10. The vehicle window glass 200 according to the present application can simultaneously meet the requirements for arranging and using multiple LIDARs and / or multiple near-infrared cameras at the same time.

[0042] The projection assembly 20 is configured to emit a projection light beam 21 toward the vehicle window glass 200. After being reflected by the vehicle window glass 200, the projection light beam 21 can form a head-up display (HUD) image that can be recognized by the human eye. The wavelength of the projection light beam 21 may be 380 nm to 780 nm. At least 90% of the projection light beam 21 may be P-polarized light. Illustratively, 100% of the projection light beam 21 may be P-polarized light, i.e., the projection light beam 21 is almost pure P-polarized light. As can be seen, the projection assembly 20 can add a head-up display function to the vehicle 1000. The higher the proportion of P-polarized light in the projection light beam 21, the easier it is to eliminate visual ghosting in the head-up display image. In the present application, P-polarized light is used for projection. Therefore, compared with existing vehicle windows that are only used with S-polarized projection light, the vehicle window glass 200 and projection assembly 20 provided in the present application can meet the requirements of drivers wearing sunglasses.

[0043] The projection assembly 20 is configured to emit a projection light beam 21 onto the vehicle windshield 200, the projection light beam 21 including relevant text and image information such as speed, engine RPM, fuel economy, tire pressure, dynamic navigation, night vision, and live maps. A head-up display (HUD) image located in front of the vehicle windshield can thereby be viewed by an observer inside the vehicle. This allows the vehicle 1000 to function as a HUD or an augmented reality HUD (AR-HUD). The projection assembly 20 may be any device known to those skilled in the art, including, but not limited to, a laser, a light emitting diode (LED), a liquid crystal display (LCD), a digital light processing (DLP), an electroluminescence (EL), a cathode ray tube (CRT), a vacuum fluorescent display (VFD), a collimator lens, a spherical correction lens, a convex lens, a concave lens, a reflector, and / or a polarizer. Additionally, the position and angle of incidence of the projection assembly 20 is adjustable to accommodate different positions or heights of observers within the vehicle.

[0044] Referring to FIG. 2, FIG. 2 is a top view of the vehicle window glass 200 shown in FIG. 1. The vehicle window glass 200 may include a signal transmission region 200a and a head-up display region 200b. The signal transmission region 200a is configured to pass the detection light beam 11 of the detection assembly 10. The head-up display region 200b is configured to reflect the projection light beam 21 of the projection assembly 20 to form a head-up display image. Illustratively, there may be a plurality of signal transmission regions 200a and a plurality of head-up display regions 200b. The present application does not specifically limit the number and positions of the signal transmission regions 200a and the head-up display regions 200b.

[0045] 3, which is a schematic diagram showing the structure of the car window glass 200 shown in FIG. 1. The car window glass 200 may include a glass substrate 210 and a transparent nanofilm 220 provided on the surface of the glass substrate 210. The glass substrate 210 includes an outer surface 210b and an inner surface 210a that are arranged opposite each other. The transparent nanofilm 220 is provided on the inner surface 210a. After the car window glass 200 is connected to the car body 100, the outer surface 210b is the surface of the glass substrate 210 that faces the outside of the vehicle. Car window glass 200 After being connected to the vehicle body 100, the inner surface 210a of the glass substrate 210 faces the inside of the vehicle. The transparent nano-film 220 can simultaneously increase the transmittance of the car window glass 200 to the detection light 11 of the detection assembly 10 and the reflectance of the car window glass 200 to the projection light 21 of the projection assembly 20, thereby allowing the car window glass 200 to simultaneously meet the usage requirements of both the detection assembly 10 and the projection assembly 20. As can be seen, the car window glass 200 can have high transmittance to the detection light 11 to meet the high-precision operation requirements of the detection assembly 10, and can have relatively high reflectance to the projection light 21 to form a clear head-up display image without visual ghosting. The vehicle window glass 200 preferably has a transmittance of 80% or more for the detection light beam 11 incident at an incident angle of 50° to 73°, and preferably has a reflectance of 20% or more for the projection light beam 21 incident on the surface of the vehicle window glass 200 facing the interior of the vehicle at an incident angle of 45° to 85°. Exemplarily, the detection assembly 10 is a 905 nm LIDAR and / or a 1550 nm LIDAR. The detection assembly 10 is configured to emit and receive the detection light beam 11 passing through the vehicle window glass 200. The vehicle window glass 200 is attached to the vehicle body 100 at an inclination angle of 25°. The detection light beam 11 is configured to pass through the signal transmission region 200a of the vehicle window glass 200 at an incident angle of approximately 65°. The vehicle window glass 200 has a transmittance of 80% or more for the detection light beam 11. The projection light ray 21 is incident on the head-up display area 200b of the car window glass 200 at an incident angle of approximately 65° from inside the car. The reflectance of the car window glass 200 to the projection light ray 21 is 20% or more.

[0046] The wavelength of the projected light beam 21 may be 380 nm to 780 nm, which corresponds to the spectral range of visible light perceptible by the human eye. The wavelength range of the projected light beam 21 also covers the RGB wavelengths associated with the projection assembly 20: 469 nm (blue), 529 nm (green), and 629 nm (red). Therefore, the vehicle window glass 200 according to the present application can cooperate with the projection assembly 20 to realize full-color display of a head-up display image.

[0047] Referring to FIG. 4, FIG. 4 is a schematic diagram showing the structure of the glass substrate 210 shown in FIG. 3 when the glass substrate 210 is laminated glass. The glass substrate 210 is laminated glass including an outer glass plate 211, an inner glass plate 212, and an intermediate layer 213 provided between the outer glass plate 211 and the inner glass plate 212. The outer glass plate 211 includes a first surface 211a and a second surface 211b arranged opposite each other. The first surface 211a is separated from the intermediate layer 213, and the second surface 211b is connected to the intermediate layer 213. The first surface 211a is also the outer surface 210b of the glass substrate 210. The inner glass plate 212 includes a third surface 212a and a fourth surface 212b arranged opposite each other. The third surface 212a is connected to the intermediate layer 213, and the fourth surface 212b is separated from the intermediate layer 213. The fourth surface 212b is also the inner surface 210a of the glass substrate 210. A transparent nanofilm 220 is provided on the fourth surface 212b of the inner glass plate 212. The transmittance of the outer glass plate 211 and / or the inner glass plate 212 to near-infrared light with a wavelength of 850 nm to 1650 nm is 91% or more, and the visible light transmittance of the car window glass 200 is 70% or more, thereby meeting the regulatory requirements for the windshield of the vehicle 1000.

[0048] Although laminated glass used as a windshield is usually curved, the shape of the laminated glass is not limited to the above shape and may be any shape that satisfies the requirements for use as the car window glass 200. For example, the car window glass 200 may be flat. In the embodiment of the present application, the shape of the car window glass 200 is not strictly limited. Illustratively, the car window glass 200 has a vertical radius of curvature in the direction from the bottom edge to the top edge. To facilitate the design and production of the car window glass 200, the vertical radius of curvature is 4000 mm to 20000 mm.

[0049] The outer glass sheet 211 and the inner glass sheet 212 may be ultra-clear glass. The content of iron oxide (Fe2O3) in ultra-clear glass is relatively low. Calculated by weight, each of the outer glass sheet 211 and the inner glass sheet 212 may contain 0 to 0.1% iron oxide (Fe2O3). For example, the content of iron oxide (Fe2O3) in each of the outer glass sheet 211 and the inner glass sheet 212 may be 0.09% or less, 0.08% or less, 0.07% or less, 0.05% or less, 0.04% or less, 0.03% or less, 0.02% or less, 0.015% or less, or 0.01% or less. Furthermore, the outer glass sheet 211 and the inner glass sheet 212 may contain almost no iron oxide (Fe2O3). Illustratively, the outer glass sheet 211 and the inner glass sheet 212 may be soda-lime-silica ultra-clear glass, borosilicate glass, high alumina glass, or the like.

[0050] The interlayer 213 is used to connect the outer glass sheet 211 and the inner glass sheet 212, thereby providing the car window glass 200 with a laminated structure, improving the safety of the car window glass 200 and enabling the car window glass 200 to meet safety standards and regulatory requirements for window glass for the vehicle 1000. The material of the interlayer 213 can be polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), thermoplastic urethane (TPU), ionoplast interlayer (Sentry Glass Plus (SGP)), or the like. Illustratively, the interlayer 213 can have a single-layer structure or a multi-layer structure, and examples of multi-layer structures include a two-layer structure, a three-layer structure, a four-layer structure, a five-layer structure, and the like. The intermediate layer 213 may also have other functions, for example, by providing at least one colored area as a shadow band to reduce the harmful effects of sunlight on the eyes, by adding an infrared absorber to provide sun protection or heat insulation, by adding an ultraviolet absorber to provide ultraviolet blocking, or by increasing the plasticizer content of at least one layer of the multi-layer structure to provide sound insulation.

[0051] Existing car window glasses 200 often use a wedge-shaped intermediate layer 213 with a wedge angle of at least 0.3 mrad to eliminate ghosting in head-up displays, which makes it difficult to design, manufacture, and debug the imaging effect of the projection assembly 20. In the car window glass 200 of the present application, the wedge-shaped intermediate layer 213 can be directly replaced with a regular intermediate layer 213 with a uniform thickness, thereby reducing costs and the difficulty of design, manufacture, and debug. The wedge angle of the intermediate layer 213 with a uniform thickness is approximately 0, and the cross-sectional shape is approximately rectangular. In the present application, a wedge-shaped intermediate layer 213 having a relatively small wedge angle may be selected, for example, the wedge angle of the wedge-shaped intermediate layer 213 is 0.01 to 0.15 mrad, such as 0.01 mrad, 0.02 mrad, 0.03 mrad, 0.04 mrad, 0.05 mrad, 0.06 mrad, 0.07 mrad, 0.08 mrad, 0.09 mrad, 0.10 mrad, 0.11 mrad, 0.12 mrad, 0.13 mrad, 0.14 mrad, 0.15 mrad, etc. In this way, the perspective ghost of scenery in the external environment of the vehicle 1000 that occurs on the vehicle window glass 200 can be eliminated, and the wedge-shaped intermediate layer 213 having a relatively small wedge angle can be obtained through a simple drawing process, which can simultaneously eliminate reflection ghost and perspective ghost at low cost, thereby achieving a higher quality projection image and viewing effect.

[0052] The intermediate layer 213 may be a transparent intermediate layer or a colored intermediate layer. The visible light transmittance of the intermediate layer 213 may be 80% or more, preferably 85% or more, and more preferably 90% or more. The thickness of the intermediate layer 213 may be 0.38 mm to 1.6 mm, for example, 0.38 mm, 0.5 mm, 0.76 mm, 1.14 mm, 1.52 mm, 1.6 mm, etc. Preferably, the intermediate layer 213 is a colored intermediate layer having a visible light transmittance of 80% or more, which can absorb P-polarized light with a wavelength of 380 nm to 780 nm. This facilitates the elimination of visual ghosts in head-up display images. Furthermore, because the colored intermediate layer has a specific color, there is no need to pay too much attention to the reflected color of the transparent nanofilm 220 when designing the transparent nanofilm 220. This increases the degree of freedom in designing the transparent nanofilm 220.

[0053] The transparent nanofilm 220 is directly disposed on the fourth surface 212b of the glass substrate 210. The transparent nanofilm 220 covers at least the signal transmission area 200a and the head-up display area 200b. The transparent nanofilm 220 may cover at least 60%, at least 70%, at least 80%, at least 90%, or even 100% of the area of ​​the fourth surface 212b. The transparent nanofilm 220 can simultaneously meet the high-precision operation requirements of the detection assembly 10 and the requirements for a clear head-up display image without visual ghosting. Therefore, the transparent nanofilm 220 can cover the signal transmission area 200a and the head-up display area 200b through a one-time deposition process, avoiding the need for a conventional partition deposition process. This reduces the number of process steps, lowers manufacturing difficulty, and improves production efficiency.

[0054] Referring to FIG. 5, FIG. 5 is a schematic diagram showing the structure of the car window glass 200 shown in FIG. 4 in a first possible embodiment. The transparent nanofilm 220 includes a standard high refractive index layer 221, an enhanced high refractive index layer 222, and an outermost low refractive index layer 223. The standard high refractive index layer 221, the enhanced high refractive index layer 222, and the outermost low refractive index layer 223 are sequentially stacked in a direction away from the fourth surface 212b. The refractive index of the standard high refractive index layer 221 is 1.61 to 2.59. The refractive index of the enhanced high refractive index layer 222 is 2.60 to 2.72. The refractive index of the outermost low refractive index layer 223 is 1.35 to 1.60.

[0055] The standard high refractive index layer 221 may have a thickness of 5 nm to 55 nm. In some embodiments, the standard high refractive index layer 221 may have a thickness of 5 nm to 45 nm. In other embodiments, the standard high refractive index layer 221 may have a thickness of 5 nm to 35 nm.

[0056] The reinforced high refractive index layer 222 may have a thickness of 35 nm to 70 nm. In some embodiments, the reinforced high refractive index layer 222 may have a thickness of 45 nm to 65 nm. In some embodiments, the reinforced high refractive index layer 222 may have a thickness of 45 nm to 60 nm. In some embodiments, the reinforced high refractive index layer 222 is TiO x TiO x The rutile structure of TiO x The proportion of TiO is at least 90%. x However, TiO usually has an anatase structure, a rutile structure, or a brookite structure. x After high-temperature heat treatment at least at 560°C and bending, TiO x The rutile structure of TiO x is preferably 90% or more, more preferably 95% or more, and even 100%. x TiO in the layer x All of the TiO have a rutile structure. xIt is. In some embodiments, TiO x The refractive index n of the layer is 2.60 to 2.72. TiO x The attenuation coefficient k of the layer satisfies k≧0.0015.

[0057] The thickness of the outermost low refractive index layer 223 may be 80 nm to 130 nm. In some embodiments, the thickness of the outermost low refractive index layer 223 may be 90 nm to 120 nm. In some other embodiments, the thickness of the outermost low refractive index layer 223 may be 85 nm to 130 nm. Also, in some other embodiments, the thickness of the outermost low refractive index layer 223 may be 80 nm to 105 nm.

[0058] In the embodiments of the present application, the transparent nanofilm 220 may further include at least one laminated structure 220a. Each of the at least one laminated structure 220a may include a high refractive index layer and a low refractive index layer. The material of the high refractive index layer is SiN x O y 、SiBN x O y 、SiTiN x O y 、SiAlN x O y 、SiZrN x O y 、ZnO x 、ZnAlO x 、ZnO x 、ZnSnO x 、SiN x 、SiAlN x 、SiBN x 、SiTiN x 、SiZrN x 、TiO x 、NbO x 、ZrO x It may be at least one of materials such as. x satisfies 1<x≦3, and y satisfies 1<y<3. The material of the low refractive index layer is SiO x 、SiBO x 、SiAlO x 、SiTiO x 、SiZrO xIt may be at least one of materials such as. x satisfies 1 < x < 3.

[0059] Regarding the specific structure of the laminated structure 220a, it will be described below by referring to the second possible embodiment and the third possible embodiment.

[0060] The first possible embodiment:

[0061] Referring to FIG. 5 again, in the first possible embodiment, the transparent nanofilm 220 has a three-layer structure, and each of the three-layer structures is a standard high refractive index layer 221, a strengthened high refractive index layer 222, and an outermost low refractive index layer 223. The standard high refractive index layer 221, the strengthened high refractive index layer 222, and the outermost low refractive index layer 223 are sequentially provided on the fourth surface 212b of the inner glass plate 212.

[0062] The material of the standard high refractive index layer 221 is SiN x O y 、SiBN x O y 、SiTiN x [[ID=CO]] y O x 、SiAlN y O x 、SiZrN y O x 、ZnO x 、ZnAlO x 、ZnO x 、ZnSnO x 、SiN x 、SiAlN x 、SiBN x 、SiTiN x 、SiZrN x 、TiO x 、NbO x 、and ZrO x It may be one of them. x satisfies 1 < x ≤ 3, and y satisfies 1 < y < 3. The thickness of the standard high refractive index layer 221 is 5 nm to 35 nm (including 5 nm and 35 nm). The refractive index of the standard high refractive index layer 221 is 1.61 to 2.59 (including 1.61 and 2.59). The material of the strengthened high refractive index layer 222 is titanium oxide (TiO xwhere x satisfies 1.8 ≤ x ≤ 2. The value of the refractive index n of the strengthened high refractive index layer 222 is 2.60 to 2.72 (including 2.60 and 2.72). The thickness of the strengthened high refractive index layer 222 may be 45 nm to 65 nm (including 45 nm and 65 nm). For example, the refractive index of the strengthened high refractive index layer 222 may be 2.60, 2.61, 2.62, 2.65, 2.69, 2.70, 2.71, or 2.72, etc. The value of the refractive index n of the outermost low refractive index layer 223 is 1.35 to 1.60 (including 1.35 and 1.60). For example, the refractive index of the outermost low refractive index layer 223 may be 1.35, 1.40, 1.45, 1.50, 1.55, or 1.60. The material of the outermost low refractive index layer 223 is SiO x 、SiBO x 、SiAlO x 、SiTiO x 、and SiZrO x or one of the materials such as. x satisfies 1 < x < 3. The thickness of the outermost low refractive index layer 223 may be 90 nm to 120 nm (including 90 nm and 120 nm).

[0063] Also, in this embodiment, three examples and two comparative examples are further provided to explore the performance of the window glass 200 in the first possible embodiment.

[0064] Example 1:

[0065] The window glass 200 provided by Example 1 includes a glass substrate 210, a standard high refractive index layer 221, a strengthened high refractive index layer 222, and an outermost low refractive index layer 223 that are sequentially provided on the fourth surface 212b of the glass substrate 210. The outer glass plate 211 and the inner glass plate 212 in the glass substrate 210 are both ultra-clear glass, and the thicknesses of both the outer glass plate 211 and the inner glass plate 212 are 2.1 mm. The material of the intermediate layer 213 connecting the outer glass plate 211 and the inner glass plate 212 is PVB having a uniform thickness. The thickness of the intermediate layer 213 is 0.76 mm.

[0066] The material of the standard high refractive index layer 221 is SiO x N y and the thickness of the standard high refractive index layer 221 is 23.5 nm.

[0067] The material of the reinforced high refractive index layer 222 is TiO 2 , which has a refractive index of 2.61. x and the thickness of the enhanced high refractive index layer 222 is 58.1 nm.

[0068] The material of the outermost low refractive index layer 223 is SiO2, and the thickness of the outermost low refractive index layer 223 is 97 nm.

[0069] The standard high refractive index layer 221 is formed by magnetron sputtering. The target material power source for magnetron sputtering to form the standard high refractive index layer 221 is a medium frequency (MF) magnetron sputtering power source. The enhanced high refractive index layer 222 is formed by magnetron sputtering. The target material power source for magnetron sputtering to form the enhanced high refractive index layer 222 is a high power impulse magnetron sputtering (HiPIMS) power source. The outermost low refractive index layer 223 is formed by magnetron sputtering. The target material power source for magnetron sputtering to form the outermost low refractive index layer 223 is a medium frequency (MF) magnetron sputtering power source.

[0070] Example 2:

[0071] The same configuration of Example 2 as Example 1 will not be repeated here. The differences between Example 2 and Example 1 are as follows: In Example 2, the thickness of the standard high refractive index layer 221 is 11.9 nm. The material of the reinforced high refractive index layer 222 is TiO 2 with a refractive index of 2.72. x The thickness of the reinforced high refractive index layer 222 is 58.7 nm. The thickness of the outermost low refractive index layer 223 is 100.9 nm. n m.

[0072] Example 3:

[0073] The same configuration of Example 3 as Example 1 will not be repeated here. The differences between Example 3 and Example 1 are as follows: In Example 3, the material of the standard high refractive index layer 221 is ZnSnO3. The thickness of the standard high refractive index layer 221 is 6.4 nm. The material of the reinforced high refractive index layer 222 is TiO2 with a refractive index of 2.69. x The thickness of the reinforced high refractive index layer 222 is 58.7 nm, and the thickness of the outermost low refractive index layer 223 is 100.9 nm.

[0074] Comparative Example 1:

[0075] The same configuration of Comparative Example 1 as that of Example 1 will not be repeated here. The differences between Comparative Example 1 and Example 1 are as follows: The transparent nanofilm 220 is not provided on the car window glass 200 in Comparative Example 1.

[0076] Comparative Example 2:

[0077] The same configuration of Comparative Example 2 as that of Example 1 will not be repeated here. The differences between Comparative Example 2 and Example 1 are as follows: In Comparative Example 2, in the magnetron sputtering process, the target material power supply for forming the reinforced high refractive index layer 222 is a medium frequency (MF) magnetron sputtering power supply. The material of the reinforced high refractive index layer 222 is TiO 2 with a refractive index of 2.50. x is.

[0078] Each of the vehicle window glasses 200 in Comparative Examples 1-2 and Examples 1-3 is integrated with a detection assembly 10 and a projection assembly 20. The reflectance Rp of P-polarized light, the Lab value of the reflected color, the visible light transmittance, and the P-polarized light transmittance are measured and calculated.

[0079] The projection assembly 20 emits a projection light beam 21 having a wavelength between 380 nm and 780 nm, at least 99% of which is P-polarized.

[0080] The detection assembly 10 emits and receives detection light 11 having wavelengths of 905 nm and 1550 nm, and at least 99% of the detection light 11 is P-polarized.

[0081] P-polarized light transmittance: The transmittance of the car window glass 200 for the detection light beam incident at different angles of incidence from the side of the car window glass 200 on which the transparent nanofilm 220 is provided is measured. The transmittance of the car window glass 200 for the detection light beam having wavelengths of 905 nm and 1550 nm and incident angles of 50°, 55°, 60°, 65°, 70°, and 73° is recorded and is shown as transmittance T(905 nm) and T(1550 nm), respectively.

[0082] P-polarized light reflectance: The reflectance of the car window glass 200 is measured for projected light rays incident at an angle of incidence of 65° from the side of the car window glass 200 where the transparent nanofilm 220 is provided. The reflectance Rf of the car window glass 200 for projected light rays with wavelengths of 469 nm (blue), 529 nm (green), and 629 nm (red) is recorded.

[0083] Visible light transmittance TL: Calculated based on ISO standard 9050.

[0084] Reflected color L, a, b: Measured from the outer surface of the car window glass 200, based on a D65 illuminant and a 10° field of view (FOV), the L, a, and b values ​​are calculated according to the CIE (International Commission on Illumination) Lab color space. The L value indicates lightness, the a value indicates red and green values, and the b value indicates yellow and blue values.

[0085] The measurement results for each of Comparative Examples 1 and 2 and Examples 1 to 3 are recorded in Table 1.

[0086] Table 1: Measurement results of the car window glass 200 in each of Comparative Examples 1 to 2 and Examples 1 to 3 JPEG2025537470000014.jpg205170

[0087] As can be seen from this comparison, Comparative Example 1 does not include the transparent nanofilm 220, so its P-polarized light reflectance is much lower than 20%, and the P-polarized light reflectance Rf at wavelengths of 469 nm, 529 nm, and 629 nm is each less than 3%. This prevents the car window glass 200 in Comparative Example 1 from functioning as a head-up display. Furthermore, the transmittance for P-polarized light with a wavelength of 1550 nm incident at an incident angle of 50° to 73° is significantly reduced to less than 80%. This prevents the car window glass 200 in Comparative Example 1 from meeting the detection requirements of 1550 nm LIDAR at an incident angle of 73°.

[0088] In Comparative Example 2, a transparent nanofilm 220 is provided, and the enhanced high refractive index layer 222 in the transparent nanofilm 220 is deposited using a normal medium frequency (MF) magnetron sputtering power supply. After the transparent nanofilm 220 and the inner glass plate 212 are subjected to a high temperature heat treatment at least at 560°C and bending, for example, a heating and bending process for car window glass, a TiO 2 film having a refractive index n of less than 2.6 and an extinction coefficient k of less than 0.001 is formed. x The layer is obtained as a reinforced high refractive index layer 222. The car window glass 200 of Comparative Example 2 meets the high transmittance requirement of 80% or more for P-polarized light of 905 nm lidar and 1550 nm lidar incident at angles of incidence between 50° and 73°. However, the reflectance Rf of the car window glass 200 of Comparative Example 2 for P-polarized light at wavelengths of 469 nm, 529 nm, and 629 nm is less than 20%. The reflectance Rf of the car window glass 200 of Comparative Example 2 for P-polarized light at wavelengths of 529 nm and 629 nm is also less than 15%. Therefore, the brightness of the head-up display image may be insufficient, necessitating the use of a high-power projection assembly. However, a large amount of heat is generated during operation of a high-power projection assembly, leading to heat accumulation, which is not beneficial to heat dissipation of the projection assembly.

[0089] The Lab value of the reflected color and the visible light transmittance TL of the car window glass 200 in each of Examples 1 to 3 show that the car window glass 200 can meet the safety requirements for use in the vehicle 1000, and that the car window glass 200 can exhibit a beautiful light blue color when viewed from outside the vehicle 1000.

[0090] In each of Examples 1 to 3, a transparent nanofilm 220 is provided, a high-power impulse magnetron sputtering (HiPIMS) power source is used in depositing the reinforced high refractive index layer 222, and after the transparent nanofilm 220 and the inner glass plate 212 are subjected to a high-temperature heat treatment at at least 560°C and bending, for example, after the heating and bending process for car window glass is performed, a TiO 2 having a refractive index n of 2.6 or more and an extinction coefficient k of 0.003 or more is obtained. x The layer is obtained as a reinforced high refractive index layer 222. Compared with Comparative Example 1 and Comparative Example 2, the car window glass 200 in each of Examples 1 to 3 not only meets the high transmittance requirement of 80% or more for P-polarized light of 905 nm LIDAR and 1550 nm LIDAR incident at angles of incidence between 50° and 73°, but also achieves reflectances of 20% or more for P-polarized light at wavelengths of 469 nm, 529 nm, and 629 nm, thereby simultaneously meeting the requirements for use of both the detection assembly 10 and the projection assembly 20. In addition, the range of reflectance of the car window glass 200 for P-polarized light at wavelengths of 469 nm, 529 nm, and 629 nm is 3% or less. In other words, the difference obtained by subtracting the minimum values ​​of Rf(469nm), Rf(529nm), and Rf(629nm) from the maximum values ​​of Rf(469nm), Rf(529nm), and Rf(629nm) is 3% or less. This ensures a smooth reflection spectrum for P-polarized light and a neutral color head-up display image.

[0091] Second possible embodiment:

[0092] Referring to FIG. 6, FIG. 6 is a schematic diagram showing the structure of the car window glass 200 shown in FIG. 4 in a second possible embodiment. In a second possible embodiment, the transparent nanofilm 220 includes a laminate structure 220a, a standard high refractive index layer 221, an enhanced high refractive index layer 222, and an outermost low refractive index layer 223. The laminate structure 220a includes a first high refractive index layer 224 and a first low refractive index layer 225. The first high refractive index layer 224, the first low refractive index layer 225, the standard high refractive index layer 221, the enhanced high refractive index layer 222, and the outermost low refractive index layer 223 are sequentially disposed on the fourth surface 212b. The thickness of the first high refractive index layer 224 may be 2 nm to 180 nm, inclusive. The thickness of the first low refractive index layer 225 may be 30 nm to 85 nm, inclusive. The thickness of the standard high refractive index layer 221 may be 5 nm to 55 nm, inclusive. The thickness of the reinforced high refractive index layer 222 may be 45 nm to 65 nm, inclusive. The thickness of the outermost low refractive index layer 223 may be 85 nm to 130 nm, inclusive.

[0093] This embodiment provides three examples and one comparative example to study the performance of the car window glass 200 in the second possible embodiment.

[0094] Example 4:

[0095] The vehicle window glass 200 provided in Example 4 includes a glass substrate 210 and a first high refractive index layer 224, a first low refractive index layer 225, a standard high refractive index layer 221, a tempered high refractive index layer 222, and an outermost low refractive index layer 223, which are sequentially formed on the fourth surface 212b of the glass substrate 210. The outer glass sheet 211 and the inner glass sheet 212 of the glass substrate 210 are both made of ultra-clear glass, and each has a thickness of 2.1 mm. The interlayer 213 connecting the outer glass sheet 211 and the inner glass sheet 212 is made of PVB with a uniform thickness. The interlayer 213 has a thickness of 0.76 mm.

[0096] The material of the first high refractive index layer 224 is SiO x N y and the thickness of the first high refractive index layer 224 is 152.8 nm.

[0097] The material of the first low refractive index layer 225 is SiO2, and the thickness of the first low refractive index layer 225 is 71.2 nm.

[0098] The material of the standard high refractive index layer 221 is SiO x N y and the thickness of the standard high refractive index layer 221 is 44.7 nm.

[0099] The material of the reinforced high refractive index layer 222 is TiO 2 , which has a refractive index of 2.72. x and the thickness of the enhanced high refractive index layer 222 is 46.7 nm.

[0100] The material of the outermost low refractive index layer 223 is SiO2, and the thickness of the outermost low refractive index layer 223 is 99.3 nm.

[0101] The first high refractive index layer 224, the first low refractive index layer 225, the standard high refractive index layer 221, the enhanced high refractive index layer 222, and the outermost low refractive index layer 223 are all formed by magnetron sputtering. The target material power source used for magnetron sputtering to form the first high refractive index layer 224, the first low refractive index layer 225, the standard high refractive index layer 221, and the outermost low refractive index layer 223 is a medium frequency (MF) magnetron sputtering power source. The target material power source used for magnetron sputtering to form the enhanced high refractive index layer 222 is a high power impulse magnetron sputtering (HiPIMS) power source.

[0102] Example 5:

[0103] The same configuration of Example 5 as Example 4 will not be repeated here. The differences between Example 5 and Example 4 are as follows: In Example 5, the thickness of the first high refractive index layer 224 is 27.7 nm. The thickness of the first low refractive index layer 225 is 38.9 nm. The material of the standard high refractive index layer 221 is SiN x and the thickness of the standard high refractive index layer 221 is 17.5 nm. The material of the enhanced high refractive index layer 222 is TiO 2 with a refractive index of 2.62. x and the thickness of the reinforced high refractive index layer 222 is 47.7 nm. The thickness of the outermost low refractive index layer 223 is 124.9 nm.

[0104] Example 6:

[0105] The same configuration of Example 6 as Example 4 will not be repeated here. The differences between Example 6 and Example 4 are as follows: In Example 6, the material of the first high refractive index layer 224 is SiO x N y and the thickness of the first high refractive index layer 224 is 166.6 nm. First low refractive index layer 225 The material of the standard high refractive index layer 221 is Nb2O5, and the thickness of the standard high refractive index layer 221 is 22.9 nm. The material of the enhanced high refractive index layer 222 is TiO2, which has a refractive index of 2.70. x and the thickness of the reinforced high refractive index layer 222 is 46.4 nm. The thickness of the outermost low refractive index layer 223 is 92.4 nm.

[0106] Comparative Example 3:

[0107] The same configuration of Comparative Example 3 as that of Example 4 will not be repeated here. The differences between Comparative Example 3 and Example 4 are as follows: In Comparative Example 3, the power source used during magnetron sputtering to form the reinforced high refractive index layer 222 is a medium frequency (MF) magnetron sputtering power source. The material of the reinforced high refractive index layer 222 is TiO 2 with a refractive index of 2.50. x is.

[0108] Each of the vehicle window glasses 200 in Examples 4 to 6 and Comparative Example 3 is integrated with a detection assembly 10 and a projection assembly 20. The reflectance Rp of P-polarized light, the Lab value of the reflected color, the visible light transmittance, and the P-polarized light transmittance are measured and calculated. Similar to the measurement methods of Examples 1 to 3, the measurement results for each of Examples 4 to 6 and Comparative Example 3 are recorded in Table 2.

[0109] Table 2: Measurement results of the car window glass 200 in each of Examples 4 to 6 and Comparative Example 3 JPEG2025537470000015.jpg200170

[0110] As can be seen from the comparison, the enhanced high refractive index layer 222 in Comparative Example 3 is deposited using a normal medium frequency (MF) magnetron sputtering power supply. After the transparent nanofilm 220 and the inner glass plate 212 are subjected to a high temperature heat treatment at least at 560°C and bending, for example, a heating and bending process for car window glass, a TiO 2 film having a refractive index n of less than 2.6 and an extinction coefficient k of less than 0.001 is obtained. x The layer is obtained as a reinforced high refractive index layer 222. In Comparative Example 3, the transmittance of the car window glass 200 for P-polarized light having a wavelength of 1550 nm and incident at an incident angle of 50° to 73° is significantly reduced to less than 80%. As a result, the car window glass 200 in Comparative Example 3 cannot meet the detection requirements of 1550 nm LIDAR when the incident angle is 73°. 529 nm, The reflectance Rf of the car window glass 200 for P-polarized light at 629 nm is less than 20%, so the brightness of the head-up display image may be insufficient, and it is necessary to select a high-power projection assembly 20, which is not favorable for heat dissipation of the projection assembly 20.

[0111] In the Lab color space, the reflected color of the car window glass 200 in Comparative Example 3 has an a value of 3.8, and therefore the reflected color is reddish. The Lab values ​​of the reflected color and the visible light transmittance TL of the car window glass 200 in each of Examples 4 to 6 show that the car window glass 200 can meet the safety requirements for use in the vehicle 1000, and can present a beautiful light blue color when viewed from outside the vehicle 1000.

[0112] In each of Examples 4 to 6, a reinforced high refractive index layer 222 is deposited using a high power impulse magnetron sputtering (HiPIMS) power supply, and after the transparent nanofilm and the inner glass plate are subjected to a high temperature heat treatment at at least 560°C and bending, for example, a heating and bending process for a car window glass, a TiO 2 having a refractive index n of 2.6 or more and an extinction coefficient k of 0.002 or more is obtained. x The layer is obtained as a reinforced high refractive index layer 222. Compared to Comparative Example 3, the car window glass 200 in each of Examples 4 to 6 not only meets the high transmittance requirement of 80% or more for P-polarized light of 905 nm LIDAR and 1550 nm LIDAR incident at angles of incidence between 50° and 73°, but also achieves reflectances of 20% or more for P-polarized light at wavelengths of 469 nm, 529 nm, and 629 nm, thereby simultaneously meeting the requirements for use of both the detection assembly 10 and the projection assembly 20. In addition, the range of reflectance of the car window glass 200 for P-polarized light at wavelengths of 469 nm, 529 nm, and 629 nm is 3% or less. That is, the difference obtained by subtracting the minimum value of Rf(469 nm), Rf(529 nm), and Rf(629 nm) from the maximum value of Rf(469 nm), Rf(529 nm), and Rf(629 nm) is 3% or less, further 2% or less, and further 1% or less. As a result, the reflection spectrum for P-polarized light is smooth, and a head-up display image is displayed in a neutral color.

[0113] Referring to FIG. 7, FIG. 7 is a graph showing the spectral reflectance of the car window glass 200 according to Example 4 for P-polarized light having wavelengths of 380 nm to 1600 nm and incident at an incident angle of 65°. FIG. 7 shows the following: The reflectance of the car window glass 200 for P-polarized light with wavelengths of 469 nm, 529 nm, and 629 nm is 22% or more, and the reflectance of the car window glass 200 for P-polarized light with a wavelength of 905 nm is only 4.9%. The reflectance of the car window glass 200 for P-polarized light with a wavelength of 1550 nm is only 1.2%. Therefore, the requirements for use of both the detection assembly 10 and the projection assembly 20 can be met simultaneously.

[0114] Third possible embodiment:

[0115] Referring to FIG. 8, FIG. 8 is a schematic diagram showing the structure of the car window glass 200 shown in FIG. 4 in a third possible embodiment. In a third possible embodiment, the transparent nanofilm 220 is made up of two laminated layers. ConstructionThe two stacked structures are a first stacked structure 2201 and a second stacked structure 2202. The first stacked structure 2201 includes a first high refractive index layer 224 and a first low refractive index layer 225, and the second stacked structure 2202 includes a second high refractive index layer 226 and a second low refractive index layer 227. The first high refractive index layer 224, the first low refractive index layer 225, the second high refractive index layer 226, the second low refractive index layer 227, the standard high refractive index layer 221, the enhanced high refractive index layer 222, and the outermost low refractive index layer 223 are sequentially formed on the fourth surface 212b. The thickness of the first high refractive index layer 224 may be 140 nm to 190 nm (inclusive). The thickness of the first low refractive index layer 225 may be 5 nm to 95 nm (inclusive). The second high refractive index layer 226 may have a thickness of 130 nm to 205 nm, inclusive. The second low refractive index layer 227 may have a thickness of 25 nm to 90 nm, inclusive. The standard high refractive index layer 221 may have a thickness of 5 nm to 45 nm, inclusive. The enhanced high refractive index layer 222 may have a thickness of 45 nm to 60 nm, inclusive. The outermost low refractive index layer 223 may have a thickness of 80 nm to 105 nm, inclusive.

[0116] This embodiment provides two examples and one comparative example to study the performance of the vehicle window glass 200 in a third possible embodiment.

[0117] Example 7:

[0118] The car window glass 200 provided in Example 7 includes a glass substrate 210, and a first high refractive index layer 224, a first low refractive index layer 225, a second high refractive index layer 226, a second low refractive index layer 227, a standard high refractive index layer 221, an enhanced high refractive index layer 222, and an outermost low refractive index layer 223, which are sequentially formed on a fourth surface 212b of the glass substrate 210.

[0119] The material of the first high refractive index layer 224 is SiO x Ny and the thickness of the first high refractive index layer 224 is 169.5 nm.

[0120] The material of the first low refractive index layer 225 is SiO2, and the thickness of the first low refractive index layer 225 is 37.8 nm.

[0121] The material of the second high refractive index layer 226 is ZnSnO3, and the thickness of the second high refractive index layer 226 is 165.6 nm.

[0122] The material of the second low refractive index layer 227 is SiO2, and the thickness of the second low refractive index layer 227 is 70.2 nm.

[0123] The material of the standard high refractive index layer 221 is Nb2O5, and the thickness of the standard high refractive index layer 221 is 23.2 nm.

[0124] The material of the reinforced high refractive index layer 222 is TiO 2 , which has a refractive index of 2.71. x and the thickness of the enhanced high refractive index layer 222 is 56.5 nm.

[0125] The material of the outermost low refractive index layer 223 is SiO2, and the thickness of the outermost low refractive index layer 223 is 85.6 nm.

[0126] The first high refractive index layer 224, the first low refractive index layer 225, the second high refractive index layer 226, the second low refractive index layer 227, the standard high refractive index layer 221, the enhanced high refractive index layer 222, and the outermost low refractive index layer 223 are all formed by magnetron sputtering. The target material power source used for magnetron sputtering to form the first high refractive index layer 224, the first low refractive index layer 225, the second high refractive index layer 226, the second low refractive index layer 227, the standard high refractive index layer 221, and the outermost low refractive index layer 223 is a medium frequency (MF) magnetron sputtering power source. The target material power source used for magnetron sputtering to form the enhanced high refractive index layer 222 is a high power impulse magnetron sputtering (HiPIMS) power source.

[0127] Example 8:

[0128] The same configuration of Example 8 as Example 7 will not be repeated here. The differences between Example 8 and Example 7 are as follows: In Example 8, the thickness of the first high refractive index layer 224 is 159.8 nm; the thickness of the first low refractive index layer 225 is 11.5 nm; and the material of the second high refractive index layer 226 is SiO x N y The second high refractive index layer 226 has a thickness of 150 nm. The second low refractive index layer 227 has a thickness of 63.5 nm. The material of the standard high refractive index layer 221 is SiO x N y and the thickness of the standard high refractive index layer 221 is 34.4 nm. The material of the enhanced high refractive index layer 222 is TiO 2 with a refractive index of 2.65. x and the thickness of the reinforced high refractive index layer 222 is 52.8 nm, and the thickness of the outermost low refractive index layer 223 is 92.6 nm.

[0129] Comparative Example 4:

[0130] The same configuration of Comparative Example 4 as that of Example 8 will not be repeated here. The differences between Comparative Example 4 and Example 8 are as follows: In Comparative Example 4, the target material power supply used during magnetron sputtering to form the reinforced high refractive index layer 222 is a medium frequency (MF) magnetron sputtering power supply. The material of the reinforced high refractive index layer 222 is TiO 2 with a refractive index of 2.50. x is.

[0131] Each of the vehicle window glasses 200 in Examples 7-8 and Comparative Example 4 is integrated with a detection assembly 10 and a projection assembly 20. The reflectance Rp of P-polarized light, the Lab value of the reflected color, the visible light transmittance, and the P-polarized light transmittance are measured and calculated. Similar to the measurement methods of Examples 1-3, the measurement results for each of Examples 7-8 and Comparative Example 4 are recorded in Table 3.

[0132] Table 3: Measurement results of the car window glass 200 in each of Examples 7 to 8 and Comparative Example 4 JPEG2025537470000016.jpg196170

[0133] As can be seen from this comparison, the enhanced high refractive index layer 222 in Comparative Example 4 is deposited using a normal medium frequency (MF) magnetron sputtering power supply. After the transparent nanofilm 220 and the inner glass plate 212 are subjected to a high temperature heat treatment at least at 560°C and bending, for example, a heating and bending process for car window glass, a TiO 2 film having a refractive index n of less than 2.6 and an extinction coefficient k of less than 0.001 is obtained. x The layer is obtained as a reinforced high refractive index layer 222. The transmittance of the car window glass 200 in Comparative Example 4 for P-polarized light with a wavelength of 1550 nm incident at an incident angle of 50° to 73° is significantly reduced to less than 80%. As a result, the car window glass 200 in Comparative Example 4 cannot meet the detection requirements of 1550 nm LIDAR when the incident angle is 73°. In Comparative Example 4, the reflectance Rf of the car window glass 200 for P-polarized light with a wavelength of 629 nm is less than 19%. Therefore, the brightness of the head-up display image may be insufficient, and a high-power projection assembly 20 must be selected. This is not beneficial for heat dissipation of the projection assembly 20.

[0134] Example 7~8 The Lab value of the reflected color and the visible light transmittance TL of the car window glass 200 in each of the above indicates that the car window glass 200 can meet the safety requirements for use in the vehicle 1000, and that the car window glass 200 can exhibit a beautiful light blue color when viewed from outside the vehicle 1000.

[0135] In each of Examples 7-8, an enhanced high refractive index layer 222 was deposited using a high power impulse magnetron sputtering (HiPIMS) power source, resulting in a transparent nanofilm. 220 and inner glass plate 212After high-temperature heat treatment at at least 560°C and bending, e.g., after the heating and bending process for car window glass, a TiOx layer with a refractive index n of 2.6 or greater and an extinction coefficient k of 0.0015 or greater is obtained as a reinforced high-refractive index layer 222. Compared to Comparative Example 4, the car window glass 200 in each of Examples 7 and 8 not only meets the high transmittance requirement of 80% or greater for P-polarized light from 905-nm lidar and 1550-nm lidar incident at angles of incidence between 50° and 73°, but also achieves reflectance of 22% or greater for P-polarized light at wavelengths of 469 nm, 529 nm, and 629 nm, thereby achieving high-brightness head-up display images. Furthermore, the reflectance range of the car window glass 200 for P-polarized light at wavelengths of 469 nm, 529 nm, and 629 nm is 3% or less. That is, the difference obtained by subtracting the minimum value of Rf(469 nm), Rf(529 nm), and Rf(629 nm) from the maximum value of Rf(469 nm), Rf(529 nm), and Rf(629 nm) is 3% or less, further 2% or less, and further 1% or less. As a result, the reflection spectrum for P-polarized light is smooth, and a head-up display image is displayed in a neutral color.

[0136] The present application further provides a manufacturing method for a vehicle window glass 200. Referring to FIG. 9, FIG. 9 is a flowchart of the manufacturing method for a vehicle window glass 200 according to an embodiment of the present application. For the specific structure of the vehicle window glass 200, reference can be made to FIGS. 1 to 8 and the above description. Unless there is a contradiction, improvements to the vehicle window glass 200 can be applied to the vehicle window glass 200 according to the above description. The method includes S100 to S300.

[0137] S100: Provide an inner glass plate 212.

[0138] S200: A transparent nanofilm 220 is formed on the surface of the inner glass plate 212. The transparent nanofilm 220 includes a standard high refractive index layer 221, a reinforced high refractive index layer 222, and an outermost low refractive index layer 223. The standard high refractive index layer 221, the reinforced high refractive index layer 222, and the outermost low refractive index layer 223 are stacked in sequence in the direction away from the inner glass plate 212. The refractive index of the standard high refractive index layer 221 is 1.61 to 2.59. The refractive index of the reinforced high refractive index layer 222 is 2.6 or more, and the refractive index of the outermost low refractive index layer 223 is 1.35 to 1.60. The refractive index of the reinforced high refractive index layer 222 is 2.60 to 2.72.

[0139] S300: The car window glass 200 is formed by laminating the inner glass plate 212 provided with the transparent nanofilm 220, the intermediate layer 213, and the outer glass plate 211.

[0140] Steps S100, S200, and S300 will be described below.

[0141] First embodiment: The transparent nanofilm 220 has a three-layer structure.

[0142] In the first embodiment of the manufacturing method for the car window glass 200, steps S100, S200 and S300 are specifically described as follows.

[0143] S100: Provide an inner glass plate 212.

[0144] Specifically, a 2.1 mm thick borosilicate float ultra-clear glass is used as the inner glass sheet 212. After the inner glass sheet 212 is cut, edge-polished, cleaned, dried, and other processes, it enters a magnetron sputtering coating line for coating deposition. After the deposition is complete, the inner glass sheet 212 is hot-bent or tempered or annealed.

[0145] S200: A transparent nanofilm 220 is formed on the surface of the inner glass plate 212. The transparent nanofilm 220 includes a standard high refractive index layer 221, a reinforced high refractive index layer 222, and an outermost low refractive index layer 223. The standard high refractive index layer 221, the reinforced high refractive index layer 222, and the outermost low refractive index layer 223 are stacked in sequence in the direction away from the inner surface 210a. The refractive index of the standard high refractive index layer 221 is 1.61 to 2.59. The refractive index of the reinforced high refractive index layer 222 is 2.60 or more. The refractive index of the outermost low refractive index layer 223 is 1.35 to 1.60.

[0146] Specifically, first, a standard high refractive index layer 221 is formed on the surface of the inner glass plate 212 by magnetron sputtering.

[0147] A medium frequency (MF) magnetron sputtering power supply was used as the target material power supply, SiAl (Si:Al=92:8 wt%) was used as the target material, and Ar, N2, and O2 were used as the process gas, and magnetron sputtering was performed on the surface of the inner glass plate 212 to form SiO x N y Form a layer of SiO x N y After hot bending or tempering and annealing the layer, the standard high refractive index layer 221 described above is obtained.

[0148] Next, a high-power impulse magnetron sputtering (HiPIMS) power supply was used as the target material power supply, and ceramic TiO x (x is 1.85) as the target material and Ar as the process gas to form TiO x Forms a TiO layer. x After the layer is hot bent or tempered and annealed, the tempered high refractive index layer 222 described above is obtained.

[0149] As can be seen, the enhanced high refractive index layer 222 of the present application is formed by sputtering TiO onto the glass substrate 210 using a high power impulse magnetron sputtering (HiPIMS) power source. By adjusting the power source parameters, the TiO in the transparent nanofilm 220 can be x As the layer is bent and annealed, more TiO x The material can be transformed into a rutile structure, so that the refractive index of the reinforced high refractive index layer 222 in the transparent nanofilm 220 can reach 2.60-2.72 after bending and annealing.

[0150] Finally, an outermost low refractive index layer 223 is formed by magnetron sputtering on the surface of the reinforced high refractive index layer 222 away from the standard high refractive index layer 221 and the inner glass plate 212 .

[0151] Specifically, a medium frequency (MF) magnetron sputtering power supply is used as the target material power supply, SiAl (Si:Al=92:8 wt%) is used as the target material, and Ar and O2 are used as the process gas, and a SiO2 layer is formed by magnetron sputtering on the surface of the reinforced high refractive index layer 222, which is away from the standard high refractive index layer 221 and the inner glass plate 212. The SiO2 layer is the outermost low refractive index layer 223 mentioned above.

[0152] S300: The car window glass 200 is formed by laminating the inner glass plate 212 provided with the transparent nanofilm 220, the intermediate layer 213, and the outer glass plate 211.

[0153] Specifically, after the above steps are completed, the inner glass sheet 212 and the outer glass sheet 211 are matched according to the standard manufacturing process of laminated safety glass for the vehicle 1000. The inner glass sheet 212 and the outer glass sheet 211 are subjected to processes such as size matching and lamination to manufacture the vehicle window glass 200 having a laminated structure.

[0154] Second embodiment:

[0155] The same content of the second embodiment as that of the first embodiment of the manufacturing method described above will not be repeated here. The differences between the second embodiment of the manufacturing method and the first embodiment of the manufacturing method are as follows. In the second embodiment, in step S200, Standard high refractive index layer 221 Before magnetron sputtering the fourth surface 212b of the inner glass plate 212 to form

[0156] Inner glass plate 212 Fourth surface 212b At least one laminated structure 220a is formed on the substrate 210. Each laminated structure 220a includes one high refractive index layer and one low refractive index layer.

[0157] In a first possible embodiment, the transparent nanofilm 220 can include one laminated structure 220a, a standard high refractive index layer 221, an enhanced high refractive index layer 222, and an outermost low refractive index layer 223. The laminated structure 220a includes a first high refractive index layer 224 and a first low refractive index layer 225. The method for manufacturing the laminated structure 220a includes steps 1 and 2.

[0158] Step 1: The first high refractive index layer 224 is formed on the fourth surface 212 b of the inner glass plate 212 .

[0159] Specifically, a medium frequency (MF) magnetron sputtering power supply is used as a target material power supply, and SiAl (Si:Al=92:8 wt%) is used as a target material, and magnetron sputtering is performed on the fourth surface 212b of the inner glass plate 212 to form the first high refractive index layer 224. The material of the first high refractive index layer 224 is SiO x N y is.

[0160] Step 2: A first low refractive index layer 225 is formed on the surface of the first high refractive index layer 224 that is away from the inner glass plate 212 .

[0161] Specifically, a medium frequency (MF) magnetron sputtering power supply is used as the target material power supply, and SiAl (Si:Al=92:8 wt%) is used as the target material, and magnetron sputtering is performed on the surface of the first high refractive index layer 224, which is away from the inner glass plate 212, to form a first low refractive index layer 225. The material of the first low refractive index layer 225 is SiO2.

[0162] After step 2 is completed, a standard high refractive index layer 221 is formed on the surface of the first low refractive index layer 225, away from the first high refractive index layer 224. A reinforced high refractive index layer 222 is formed on the surface of the standard high refractive index layer 221, away from the first low refractive index layer 225. An outermost low refractive index layer 223 is formed on the surface of the reinforced high refractive index layer 222, away from the standard high refractive index layer 221.

[0163] For the methods of forming the standard high refractive index layer 221, the reinforced high refractive index layer 222, and the outermost low refractive index layer 223, refer to the description in the first embodiment of the method for manufacturing the car window glass 200. In this embodiment, step 2 and the steps after step 2 are not repeated.

[0164] In a second possible embodiment, the transparent nanofilm 220 has a seven-layer structure. The transparent nanofilm 220 has a two-layer structure. Construction It can include two laminated structures. The structure , includes a first stacked structure 2201 and a second stacked structure 2202. The first stacked structure 2201 includes a first high refractive index layer 224 and a first low refractive index layer 225. The second stacked structure 2202 includes a second high refractive index layer 226 and a second low refractive index layer 227.

[0165] Layered structure Construction The manufacturing method includes steps 1, 2, 3, and 4. Steps 1 and 2 are the same as those in the first possible embodiment described above, and therefore will not be repeated here. In this embodiment, the second high refractive index layer 226 is formed through step 3, and the second low refractive index layer 227 is formed through step 4.

[0166] Step 3: A second high refractive index layer 226 is formed on the surface of the first low refractive index layer 225 away from the first high refractive index layer 224 .

[0167] Specifically, a medium frequency (MF) magnetron sputtering power supply is used as the target material power supply, and SiAl (Si:Al=92:8 wt%) is used as the target material, and magnetron sputtering is performed on the surface of the first low refractive index layer 225, which is away from the first high refractive index layer 224, to form the second high refractive index layer 226. The material of the second high refractive index layer 226 is SiO x N y is.

[0168] Step 4: A second low refractive index layer 227 is formed on the surface of the second high refractive index layer 226 away from the first low refractive index layer 225 .

[0169] Specifically, a medium frequency (MF) magnetron sputtering power supply is used as the target material power supply, and SiAl (Si:Al=92:8 wt%) is used as the target material, and magnetron sputtering is performed on the surface of the second high refractive index layer 226, which is away from the first low refractive index layer 225, to form the second low refractive index layer 227. The material of the second low refractive index layer 227 is SiO2.

[0170] After step 4 is completed, a standard high refractive index layer 221 is formed on the surface of the second low refractive index layer 227 away from the second high refractive index layer 226 . Second low refractive index layer 227 A reinforced high refractive index layer 222 is formed on the surface of the standard high refractive index layer 221, which is away from the standard high refractive index layer 221. An outermost low refractive index layer 223 is formed on the surface of the reinforced high refractive index layer 222, which is away from the standard high refractive index layer 221.

[0171] For the methods of forming the standard high refractive index layer 221, the reinforced high refractive index layer 222, and the outermost low refractive index layer 223, refer to the description in the first embodiment of the method for manufacturing the car window glass 200. In this embodiment, step 4 and the steps after step 4 are not repeated.

[0172] TiO produced by using a medium frequency (MF) magnetron sputtering power supply as the target material power supply x The TiO layer has some drawbacks, such as weak adhesion and low ionization rate. After high-temperature heat treatment at least at 560°C and bending, the TiO x In the layer, TiO with a rutile structure x and TiO, which has an anatase structure x The anatase structure TiO x is a metastable phase, so TiO x The refractive index of the layer is n = 2.50, and the extinction coefficient k is less than 0.001. In contrast, the TiO x The layer has strong adhesion and a high ionization rate. After high-temperature heat treatment at least 560°C and bending, the TiO x The layer is mainly TiO with a rutile structure. x Preferably, TiO x Rutile structure TiO x The proportion of TiO having a rutile structure is at least 90%, and even 100%. x The stability of TiO is relatively high. x The refractive index n of the layer is 2.60 to 2.72, and TiO x The extinction coefficient k of the layer satisfies k≧0.0015.

[0173] As can be seen, the transparent nanofilm 220 of the car window glass 200 includes at least a standard high refractive index layer 221, an enhanced high refractive index layer 222, and an outermost low refractive index layer 223. The enhanced high refractive index layer 222 has a refractive index n of 2.60 or more. The enhanced high refractive index layer 222 is deposited using a high power impulse magnetron sputtering (HiPIMS) power source, and after high temperature heat treatment at least at 560°C and bending forming, a TiO 2 film having a refractive index n of 2.60 to 2.72 is obtained. xA layer can be obtained. Furthermore, through a rational coating system design, the car window glass 200 has high reflectivity for the projection light ray 21 (the reflectivity of the car window glass 200 for P-polarized light at wavelengths of 469 nm, 529 nm, and 629 nm is 20% or more) and high transmittance for the detection light ray 11 (the transmittance of the car window glass 200 for P-polarized light at wavelengths of 905 nm and 1550 nm is 80% or more). The car window glass 200 of the present application can integrate both head-up display and detection functions by providing only one type of transparent nanofilm. This avoids the need for a conventional partition deposition process for providing coatings with different functions. This reduces the number of process steps, lowers manufacturing difficulty, and improves production efficiency.

[0174] As can be seen from the above embodiment of the present application, the Lab value of the reflected color of the car window glass 200 of the present application is such that the value of a is less than 3 and the value of b is less than 0.5. Therefore, the car window glass 200 of the present application exhibits a beautiful light blue color.

[0175] The above is a detailed description of the embodiments of the present application. In this specification, specific examples are used to explain the principles and embodiments of the present application. The above description of the embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, those skilled in the art will appreciate that specific embodiments and application scope may vary based on the idea of ​​the present application. As stated above, the present specification should not be construed as limiting the present application.

Claims

1. A vehicle window glass, The car window glass comprises a glass substrate and a transparent nanofilm, the glass substrate comprises an outer surface and an inner surface arranged opposite to each other, the transparent nanofilm is arranged on the inner surface, the transparent nanofilm comprises a standard high refractive index layer, an enhanced high refractive index layer and an outermost low refractive index layer, the standard high refractive index layer, the enhanced high refractive index layer and the outermost low refractive index layer are sequentially stacked in a direction away from the inner surface, The refractive index of the standard high refractive index layer is 1.61 to 2.59, the refractive index of the reinforced high refractive index layer is 2.6 or more, and the refractive index of the outermost low refractive index layer is 1.35 to 1.

60. A vehicle window glass characterized by:

2. The car window glass has a transmittance of 80% or more for P-polarized light having a wavelength of 850 nm to 1650 nm and incident at an incident angle of 50° to 73°.

2. The vehicle window glass according to claim 1.

3. The car window glass has a reflectance of 20% or more for P-polarized light having a wavelength of 380 nm to 780 nm and incident at an incident angle of 45° to 85° from the inside of the car.

2. The vehicle window glass according to claim 1.

4. the thickness of the standard high refractive index layer is 5 nm to 55 nm; 4. The vehicle window glass according to claim 1.

5. The thickness of the reinforced high refractive index layer is 35 nm to 70 nm; 4. The vehicle window glass according to claim 1.

6. the thickness of the outermost low refractive index layer is 80 nm to 130 nm; 4. The vehicle window glass according to claim 1.

7. The reinforced high refractive index layer is TiO ｘ layer, and the TiO ｘ TiO with rutile structure in the layer ｘ The proportion of is at least 90% 4. The vehicle window glass according to claim 1.

8. The TiO ｘ The refractive index n of the layer is 2.60 to 2.72, and the TiO ｘ The extinction coefficient k of the layer satisfies k≧0.0015; 8. A vehicle window glass according to claim 7.

9. the glass substrate includes an outer glass plate, an inner glass plate, and an intermediate layer provided between the outer glass plate and the inner glass plate, a surface of the outer glass plate remote from the intermediate layer is the outer surface, and a surface of the inner glass plate remote from the intermediate layer is the inner surface, and the outer glass plate and / or the inner glass plate have a transmittance of 91% or more for near-infrared light having a wavelength of 850 nm to 1650 nm; 4. The vehicle window glass according to claim 1.

10. The transparent nanofilm only includes the standard high refractive index layer, the enhanced high refractive index layer, and the outermost low refractive index layer, the standard high refractive index layer having a thickness of 5 nm to 35 nm, the enhanced high refractive index layer having a thickness of 45 nm to 65 nm, and the outermost low refractive index layer having a thickness of 90 nm to 120 nm.

10. A vehicle window glass according to claim 9.

11. The transparent nanofilm further includes at least one laminated structure, the at least one laminated structure being disposed between the standard high refractive index layer and the inner glass plate, each of the laminated structures including a high refractive index layer and a low refractive index layer laminated in sequence, the high refractive index layer having a refractive index of 1.61 to 2.59, and the low refractive index layer having a refractive index of 1.35 to 1.

60.

10. A vehicle window glass according to claim 9.

12. the number of the laminated structures is one, the high refractive index layer is provided on the surface of the inner glass plate away from the intermediate layer, the low refractive index layer is provided between the high refractive index layer and the standard high refractive index layer, the high refractive index layer has a thickness of 2 nm to 180 nm, the low refractive index layer has a thickness of 30 nm to 85 nm, the standard high refractive index layer has a thickness of 5 nm to 55 nm, the reinforced high refractive index layer has a thickness of 45 nm to 65 nm, and the outermost low refractive index layer has a thickness of 85 nm to 130 nm; 12. A vehicle window glass according to claim 11.

13. The number of the laminated structures is two, and the two laminated structures are a first laminated structure and a second laminated structure, respectively, the first laminated structure includes a first high refractive index layer and a first low refractive index layer, and the second laminated structure includes a second high refractive index layer and a second low refractive index layer, and the first high refractive index layer, the first low refractive index layer, the second high refractive index layer, the second low refractive index layer, the standard high refractive index layer, the enhanced high refractive index layer, and the outermost low refractive index layer are separated from the intermediate layer, The lath plate is laminated in this order on its surface, and the first high refractive index layer has a thickness of 140 nm to 190 nm, the first low refractive index layer has a thickness of 5 nm to 95 nm, the second high refractive index layer has a thickness of 130 nm to 205 nm, the second low refractive index layer has a thickness of 25 nm to 90 nm, the standard high refractive index layer has a thickness of 5 nm to 45 nm, the reinforced high refractive index layer has a thickness of 45 nm to 60 nm, and the outermost low refractive index layer has a thickness of 80 nm to 105 nm.

12. A vehicle window glass according to claim 11.

14. The wedge angle of the intermediate layer is equal to 0 or is between 0.01 mrad and 0.15 mrad; 10. A vehicle window glass according to claim 9.

15. The intermediate layer is a colored intermediate layer having a visible light transmittance of 80% or more.

10. A vehicle window glass according to claim 9.

16. The visible light transmittance of the car window glass is 70% or more, and the Lab value of the reflected color of the car window glass measured from the outer surface satisfies a<3 and b<0.

5.

4. The vehicle window glass according to claim 1.

17. The car window glass has a reflectance range of 3% or less for P-polarized light having wavelengths of 469 nm, 529 nm, and 629 nm and incident at an incident angle of 65° from the inside of the car.

4. The vehicle window glass according to claim 1.

18. A vehicle, the vehicle comprises a detection assembly, a projection assembly and the car window glass according to any one of claims 1 to 17, the detection assembly and the projection assembly being provided on the side of the car window glass where the transparent nano-film is provided, the car window glass comprising a signal transmission area and / or a head-up display area, the detection assembly being configured to emit and / or receive detection light rays having a wavelength of 850 nm to 1650 nm, the detection light rays being configured to pass through the signal transmission area, and the projection assembly being configured to emit projection light rays having a wavelength of 380 nm to 780 nm to the head-up display area; the detection light beam is incident on the signal transmission region at an incident angle of 50° to 73°, and at least 80% of the detection light beam is P-polarized; the projected light beam is incident on the head-up display area at an incident angle of 45° to 85°, and at least 90% of the projected light beam is P-polarized; A vehicle characterized by:

19. A method for manufacturing a vehicle window glass, the method comprising: providing an inner glass pane; Forming a transparent nanofilm on the surface of the inner glass plate, the transparent nanofilm including a standard high refractive index layer, a reinforced high refractive index layer, and an outermost low refractive index layer, the standard high refractive index layer, the reinforced high refractive index layer, and the outermost low refractive index layer being sequentially stacked in a direction away from the inner glass plate, the refractive index of the standard high refractive index layer being 1.61 to 2.59, the refractive index of the reinforced high refractive index layer being 2.6 or more, and the refractive index of the outermost low refractive index layer being 1.35 to 1.60; laminating an inner glass sheet provided with the transparent nanofilm, an intermediate layer, and an outer glass sheet to form the car window glass; Including, A method for manufacturing a car window glass.

20. Forming a transparent nanofilm on the surface of the inner glass plate forming the standard high refractive index layer by magnetron sputtering, wherein a target material power source for magnetron sputtering to form the standard high refractive index layer is a medium frequency (MF) magnetron sputtering power source; forming the enhanced high refractive index layer by magnetron sputtering on a surface of the standard high refractive index layer away from the inner glass sheet, wherein a target material power source for magnetron sputtering to form the enhanced high refractive index layer is a high power impulse magnetron sputtering (HiPIMS) power source; forming the outermost low refractive index layer by magnetron sputtering on a surface of the enhanced high refractive index layer away from the standard high refractive index layer, wherein a target material power source for magnetron sputtering to form the outermost low refractive index layer is a medium frequency (MF) magnetron sputtering power source; Including, 20. The method of claim 19.

21. The transparent nanofilm further comprises at least one laminated structure, the at least one laminated structure being disposed between the standard high refractive index layer and the inner glass plate, each of the laminated structures comprising a high refractive index layer and a low refractive index layer laminated in sequence, the refractive index of the high refractive index layer being 1.61 to 2.59, and the refractive index of the low refractive index layer being 1.35 to 1.60; the high refractive index layer and the low refractive index layer are formed by magnetron sputtering, and a target material power source for forming the high refractive index layer and the low refractive index layer by magnetron sputtering is a medium frequency (MF) magnetron sputtering power source.

20. The method of claim 19.

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