Vehicle window glass, information acquisition system and vehicle

Abstract

The invention provides vehicle window glass, an information acquisition system and a vehicle. Wherein the window glass is provided with an information acquisition area, the information acquisition area is provided with a nano anti-reflection layer, and incident light penetrates through the information acquisition area and the nano anti-reflection layer to form first refracted light and second refracted light; the nano anti-reflection layer comprises a plurality of nano cones, and the plurality of nano cones are periodically arranged; and when the incident angle theta of the incident light is 45-75 degrees, the ratio of the transmittance of the first refracted light to the transmittance of the second refracted light is a main-secondary image transmittance ratio Cr12, and Cr12 is greater than or equal to 1000. According to the invention, the information acquisition device can obtain more accurate and clearer images.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle accessories, in particular to vehicle window glass, information collection systems and vehicles. Background Art

[0002] The intelligence and networking of automobiles are the main directions of future development, and autonomous driving has also become the main direction of automobile development. Usually, information collection devices such as visible light cameras, millimeter wave radars, laser radars, ultrasonic radars, etc. are installed near the top of the windshield in the car. These information collection devices capture and process the driving environment outside the car into image data to assist in realizing autonomous driving. For visible light cameras, the light outside the car must pass through the windshield to be received by it. Since the windshield is a laminated glass composed of an outer glass plate, an intermediate layer and an inner glass plate, and the windshield is installed on the car in an inclined shape, the external light will be reflected and refracted multiple times when entering the windshield and when it is emitted from the windshield, thereby forming one or several less obvious secondary images at a certain distance from the main image near the main image. Among these secondary images, the secondary images that can be recognized by the information collection device are defined as secondary images. Secondary image deviation refers to the angular deviation between the secondary image and the main image. Secondary image deviation will affect the accurate recognition of the image and is not conducive to obtaining accurate driving information.

[0003] Patent CN109414911B discloses a vehicle window assembly having a variable thickness distribution associated with a forward-facing camera, which utilizes a wedge-shaped thickness distribution formed in the first portion of the intermediate layer in the direction toward the upper edge to reduce the interference of the secondary image deviation on the camera. This special specification of the intermediate layer (such as PVB) is sensitive to the optical design of the vehicle model, and the windshields of different vehicle models need to be redesigned.

[0004] Patent WO2016143582A1 discloses a windshield, which adds a correction component to the shooting window of the camera to reduce the interference of the secondary image deviation on the camera. The correction component is fixed to the inner surface of the windshield by an adhesive or embedded in the through hole of the windshield. Summary of the invention

[0005] The purpose of this application is to provide a vehicle window glass, an information collection system and a vehicle, which can enable the information collection device to obtain more accurate and clear images.

[0006] In a first aspect, the present application provides a vehicle window glass, which is applied to a vehicle, wherein the vehicle window glass has an information collection area, wherein the information collection area is provided with a nanometer anti-reflection layer, and incident light passes through the information collection area and the nanometer anti-reflection layer to form a first refracted light and a second refracted light;

[0007] The nano anti-reflection layer includes a plurality of nanocones, and the plurality of nanocones are arranged periodically;

[0008] When the incident angle θ of the incident light is between 45° and 75°, the ratio of the transmittance of the first refracted light to the transmittance of the second refracted light is the primary-secondary image transmittance Cr12, and Cr12≥1000.

[0009] It can be understood that by adding a nano anti-reflection layer, the transmittance of the first refracted light can be increased, and the transmittance of the second refracted light can be reduced, thereby increasing the main-to-secondary image transmittance ratio Cr12, so that when the incident angle θ of the incident light is 45°~75°, Cr12≥1000, thereby enhancing the main image formed by the first refracted light, and weakening or even eliminating the secondary image formed by the second refracted light, so that the main image captured and processed by the information acquisition device is not interfered by the secondary image, and the final image data obtained is clear enough.

[0010] In a possible implementation manner, a periodic spacing P of the plurality of nanocones is ≤380 nm.

[0011] In a possible implementation manner, a ratio D / P of the diameters D of the plurality of nanocones to the periodic spacing P of the plurality of nanocones is in the range of 0.8≤D / P≤1.2.

[0012] In a possible implementation manner, the range of height H of the plurality of nanocones is: 200 nm≤H≤500 nm.

[0013] In a possible implementation manner, a ratio of a height H of the plurality of nanocones to a diameter D of the plurality of nanocones (H / D) ≤ 0.5.

[0014] In a possible implementation manner, Cr12≥2000, or Cr12≥3000, or Cr12≥5000, or Cr12≥8000, or Cr12≥10000, or Cr12≥20000, or Cr12≥50000.

[0015] In a possible implementation manner, the vehicle window glass is a single-piece glass having an outer surface and an inner surface, and the nano anti-reflection layer is provided on the outer surface and / or the inner surface.

[0016] In a possible implementation manner, the vehicle window glass is a laminated glass, the laminated glass comprises an outer glass plate, an intermediate layer and an inner glass plate, the outer glass plate has an opposite first surface and a second surface, the inner glass plate has an opposite third surface and a fourth surface, and the intermediate layer connects the second surface and the third surface;

[0017] At least one of the first surface, the second surface, the third surface and the fourth surface is provided with the nano anti-reflection layer.

[0018] In a possible implementation, the vehicle window glass further includes a substrate, the substrate covers the information collection area, the nano anti-reflection layer is disposed on one side surface of the substrate, and the other side surface of the substrate is connected to the surface of the laminated glass.

[0019] In a possible implementation, the vehicle window glass further includes a transition layer, the transition layer covers the information collection area, the nano anti-reflection layer is disposed on one side surface of the transition layer, and the other side surface of the transition layer is connected to the surface of the laminated glass.

[0020] In a possible implementation, the middle layer is provided with a first through groove, the first through groove penetrates the middle layer along the thickness direction, and along the thickness direction of the window glass, the orthographic projection of the first through groove on the second surface completely covers the information collection area.

[0021] In a possible implementation manner, the inner glass plate is provided with a second through groove, the second through groove runs through the third surface and the fourth surface, and along the thickness direction of the window glass, the orthographic projection of the second through groove on the second surface completely covers the information collection area;

[0022] The first surface is provided with the nano anti-reflection layer; and / or the second surface is provided with the nano anti-reflection layer, and the nano anti-reflection layer is located in the second through groove.

[0023] In a possible implementation manner, the information collection area has a transmittance TL of 65° for visible light with a wavelength of 380 nm to 780 nm incident at an incident angle of 65°. (380-780) , TL (380-780) ≥60%, or TL (380-780) ≥65%, or TL (380-780) ≥70%, or TL (380-780) ≥75%, or TL (380-780) ≥80%, or TL (380-780) ≥85%.

[0024] In a possible implementation manner, the information collection area has a transmittance TL of 900nm to 1700nm near infrared light incident at an incident angle of 65°. (900-1700) , TL (900-1700) ≥80%, or TL (900-1700) ≥85%, or TL (900-1700) ≥90%.

[0025] In a possible implementation manner, the vehicle window glass further includes an optical compensation block, the optical compensation block is connected to a surface of the vehicle window glass facing the interior of the vehicle, and along a thickness direction of the vehicle window glass, the optical compensation block covers the information collection area;

[0026] The nanometer anti-reflection layer is arranged on a surface of the optical compensation block facing the interior of the vehicle.

[0027] In a possible implementation manner, central axes of the plurality of nanocones are parallel to the normal line of the vehicle window glass.

[0028] A second aspect of the present application provides an information collection system, comprising an information collection device and the vehicle window glass as described above, wherein the information collection device comprises a housing and a lens assembly, and the lens assembly is accommodated in the housing;

[0029] The information collection device is located inside the vehicle, the housing is connected to the vehicle window glass, the lens assembly faces the vehicle window glass, and the first refracted light and the second refracted light enter the lens assembly.

[0030] In a possible implementation manner, the angle between the main axis light within the field of view angle range of the information acquisition device and the normal line of the vehicle window glass is α;

[0031] The central axes of the multiple nanocones are all tilted relative to the normal of the vehicle window glass, and the multiple nanocones are all tilted toward the lens assembly. The angle between the central axes of the multiple nanocones and the normal of the vehicle window glass is β, and β and α satisfy the following relationship: β=α / 2, or β=α / 2±30°, or β=α / 2±20°, or β=α / 2±10°.

[0032] In a possible implementation manner, the nano anti-reflection layer is formed on a surface of the window glass facing the interior of the vehicle;

[0033] The information collection system further includes a cover shell, the cover shell includes a first opening and a second opening, the first opening and the second opening are opposite to each other and communicated with each other;

[0034] The cover shell is disposed on the laminated glass, the periphery of the first opening is connected to the surface of the vehicle window glass facing the interior of the vehicle, the periphery of the second opening is connected to the outer shell, the cover shell, the outer shell and the vehicle window glass form a accommodating cavity, and the lens assembly and the nano anti-reflection layer are both located in the accommodating cavity.

[0035] A third aspect of the present application provides a vehicle, comprising a vehicle body and the information collection system as described above, wherein the information collection system is installed on the vehicle body.

[0036] The beneficial effect of the present application is that: compared with the solution of designing the laminated glass into a wedge shape in the prior art, the nano anti-reflection layer in the present application has a broadband low reflectivity and high transmittance for incident light in a wide angle range, and the nano anti-reflection layer has stronger compatibility and better versatility for various vehicle installation angles of the window glass and different types of information collection devices; that is, the nano anti-reflection layer of the same specification can be applied to a variety of application scenarios. Compared with the solution of setting a correction component in the prior art, the nano anti-reflection layer in the present application can be set on multiple surfaces of the window glass, and the setting position of the nano anti-reflection layer is more flexible; and there is no need to open a hole in the window glass specifically for the nano anti-reflection layer to ensure the structural strength of the window glass. Compared with the solution of setting a polarizer in the prior art, the nano anti-reflection layer in the present application will increase the brightness of the first refracted light while reducing the brightness of the second refracted light, so there is no need to optimize the imaging effect of the main image by optimizing the exposure value, improving the sensitivity of the image sensor, etc. Compared with the prior art of forming an anti-reflection film on the window glass, the structure of the nano anti-reflection layer in this embodiment is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0038] Figure 1 A schematic diagram of the optical path of light outside a vehicle entering an information collection device through a vehicle window glass in the prior art;

[0039] Figure 2 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0040] Figure 3 for Figure 2 The structural schematic diagram of the information collection system of the vehicle window glass shown;

[0041] Figure 4 for Figure 3 The schematic structural diagram of the first embodiment of the vehicle window glass of the information collection system shown, wherein the first implementation method of the laminated glass is shown;

[0042] Figure 5 for Figure 3 The schematic diagram of the structure of the first embodiment of the vehicle window glass of the information collection system shown, wherein a schematic diagram of the optical path of light passing through the vehicle window glass into the information collection device is shown;

[0043] Figure 6 for Figure 4 The schematic diagram of the structure of the vehicle window glass along the thickness direction is shown;

[0044] Figure 7 for Figure 4A schematic diagram of the microstructure of an embodiment of the nano anti-reflection layer at a first angle;

[0045] Figure 8 for Figure 7 A schematic diagram of the microstructure of the nano anti-reflection layer at a second angle;

[0046] Fig. 9 for Figure 4 A schematic cross-sectional structure diagram of an embodiment of a nano anti-reflection layer is shown;

[0047] Fig.10 for Figure 3 The schematic structural diagram of the first embodiment of the vehicle window glass of the information collection system shown, wherein the second implementation of the laminated glass is shown;

[0048] Fig.11 for Figure 3 The schematic structural diagram of the first embodiment of the vehicle window glass of the information collection system shown, wherein the third implementation mode of the laminated glass is shown;

[0049] Fig.12 for Figure 4 A schematic cross-sectional structure diagram of another embodiment of the nano anti-reflection layer is shown;

[0050] Fig.13 for Figure 3 The schematic structural diagram of the first embodiment of the vehicle window glass of the information collection system shown in the figure shows an implementation method in which the nano anti-reflection layer is arranged on the outer surface of the vehicle window glass;

[0051] Fig.14 for Figure 3 A structural schematic diagram of a second embodiment of a vehicle window glass of the information collection system shown;

[0052] Fig.15 for Figure 3 A schematic structural diagram of a third embodiment of a vehicle window glass of the information collection system shown;

[0053] Fig.16 for Figure 3 A schematic structural diagram of a fourth embodiment of a vehicle window glass of the information collection system shown;

[0054] Fig.17 for Figure 3 The schematic structural diagram of the fifth embodiment of the vehicle window glass of the information collection system shown, wherein the first implementation method of the laminated glass is shown;

[0055] Fig.18 for Figure 3 The schematic structural diagram of the fifth embodiment of the vehicle window glass of the information collection system shown, wherein the second implementation method of the laminated glass is shown;

[0056] Fig.19 for Figure 3 The schematic structural diagram of the fifth embodiment of the vehicle window glass of the information collection system shown, wherein the third implementation method of the laminated glass is shown;

[0057] Fig. 20 for Figure 3 The schematic structural diagram of the sixth embodiment of the vehicle window glass of the information collection system shown, wherein the first implementation method of the laminated glass is shown;

[0058] Fig.21 for Figure 3 The schematic structural diagram of the sixth embodiment of the vehicle window glass of the information collection system shown, wherein the second implementation method of the laminated glass is shown;

[0059] Fig. 22 for Figure 3 The structure schematic diagram of the sixth embodiment of the vehicle window glass of the information collection system is shown, which shows the third implementation method of laminated glass. DETAILED DESCRIPTION

[0060] For ease of understanding, the terms involved in the embodiments of the present application are first explained.

[0061] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0062] See also Figure 1 , the vehicle in the prior art generally includes a vehicle window glass 10c and an information collection device 200c. The vehicle window glass 10c includes an outer glass plate 11c, an intermediate layer 12c and an inner glass plate 13c, wherein the intermediate layer 12c is sandwiched between the outer glass plate 11c and the inner glass plate 13c. The outer glass plate 11c includes a first surface 111c and a second surface 112c which are arranged in opposite directions. The first surface 111c is used as the outer surface of the vehicle window glass 10c, the first surface 111c faces the outside of the vehicle, and the second surface 112c faces the intermediate layer 12c. The inner glass plate 13c includes a third surface 131c and a fourth surface 132c which are arranged in opposite directions. The third surface 131c faces the intermediate layer 12c, and the fourth surface 132c is used as the inner surface of the vehicle window glass 10c, and the fourth surface 132c faces the inside of the vehicle. The intermediate layer 12c connects the second surface 112c and the third surface 131c. The information collection device 200c is located inside the vehicle. The information collecting device 200c faces the vehicle window glass 10c and can capture the driving environment outside the vehicle and process it into image data.

[0063] The light outside the vehicle, i.e., the incident light T0, is incident on the first surface 111c of the vehicle window glass 10c. A portion of the incident light T0 is reflected on the first surface 111c and does not enter the vehicle window glass 10c. Another portion of the incident light T0 is refracted on the first surface 111c and enters the vehicle window glass 10c. The light refracted into the vehicle window glass 10c propagates to the fourth surface 132c. A portion of the light refracted into the vehicle window glass 10c is refracted for the first time on the fourth surface 132c and enters the interior of the vehicle to form a first refracted light T1. The first refracted light T1 continues to be transmitted and received by the information acquisition device 200c. The information acquisition device 200c processes the received first refracted light T1 to form image data as the main image. Another part of the light refracted into the vehicle window glass 10c is reflected for the first time on the fourth surface 132c, and is sequentially transmitted to the first surface 111c inside the vehicle window glass 10c for the second reflection and then transmitted to the fourth surface 132c for the second refraction. The light entering the vehicle interior after the second refraction is the second refracted light T2. The second refracted light T2 continues to be transmitted and received by the information collection device 200c. The information collection device 200c processes the received second refracted light T2 to form image data as a secondary image. Among them, the light forming the main image is the first refracted light T1, and the light forming the secondary image is the second refracted light T2. There is an angular deviation between the secondary image and the main image, that is, the secondary image deviates. The deviation of the secondary image will affect the accurate recognition of the image and is not conducive to obtaining accurate driving information. Among them, the detection of the deviation of the secondary image can be carried out in accordance with the standard "GB / T 5137.2-2020 Test Method for Automobile Safety Glass Part 2: Optical Performance Test".

[0064] It should be noted that the incident light T0 is natural light or light from an artificial light source. Natural light and almost all artificial light sources (LED, incandescent lamp, fluorescent lamp, etc.) are non-polarized or weakly polarized. There may be a third refracted light, a fourth refracted light, or even more refracted light in the window glass 10c: the light that enters the interior of the vehicle after the third refraction is the third refracted light after the third reflection on the fourth surface 132c, the fourth reflection on the first surface 111c, and the third refraction on the fourth surface 132c; the light that enters the interior of the vehicle after the fourth refraction is the fourth refracted light after the fifth reflection on the fourth surface 132c, the sixth reflection on the first surface 111c, and the fourth refraction on the fourth surface 132c. The light that enters the interior of the vehicle after the fourth refraction is the fourth refracted light. Since the brightness of the image formed by the third refracted light, the fourth refracted light, or even more refracted light is extremely low and is almost invisible in real conventional scenes, this application does not provide specific descriptions and illustrations of them.

[0065] Please refer to Figure 2 and Figure 3The present application provides a vehicle 1000. The vehicle 1000 includes a vehicle body 400 and an information collection system 300. The information collection system 300 is installed on the vehicle body 400. The information collection system 300 includes an information collection device 200 and a vehicle window glass 100. The information collection device 200 is located inside the vehicle 1000, and the information collection device 200 faces the vehicle window glass 100. The vehicle window glass 100 is installed in an opening of the vehicle body 400. The vehicle window glass 100 has an information collection area S1, and the information collection area S1 is provided with a nano anti-reflection layer 20. The light outside the vehicle 1000, that is, the incident light T0, passes through the information collection area S1 of the vehicle window glass 100 and the nano anti-reflection layer 20 to form a first refracted light T1 and a second refracted light T2, and the first refracted light T1 and the second refracted light T2 are received by the information collection device 200. The information collection device 200 can capture and process the driving environment outside the vehicle 1000 into image data. The nano anti-reflection layer 20 is used to increase the transmittance of the first refracted light T1 and reduce the transmittance of the second refracted light T2, thereby significantly reducing the brightness of the secondary image, and further weakening or even making the secondary image inconspicuous or almost invisible, so that the image data captured and processed by the information acquisition device 200 is clear enough.

[0066] It should be noted that the vehicle 1000 described in the present application may be, but is not limited to, a means of transportation such as a car, a train, and rail transit. The vehicle window glass 100 may be, but is not limited to, the front windshield, side window glass, rear windshield, and sunroof glass of the vehicle 1000. The information collection device 200 may be, but is not limited to, a visible light camera, a near-infrared camera, a thermal imager, and a laser radar. The embodiment of the present application is described by taking the vehicle 1000 as a car, the vehicle window glass 100 as a front windshield, and the information collection device 200 as a visible light camera as an example.

[0067] In the present application, the transmittance of the first refracted light T1 received by the information collection device 200 is defined as TL1, the transmittance of the second refracted light T2 received by the information collection device 200 is defined as TL2, and the ratio of TL1 to TL2 is defined as the primary-secondary image transmittance Cr12, Cr12=TL1 / TL2. By setting the nano anti-reflection layer 20, the transmittance of the first refracted light T1 is enhanced, and the transmittance of the second refracted light T2 is weakened, that is, TL1 increases and TL2 decreases, so the primary-secondary image transmittance Cr12 will be significantly increased.

[0068] It can be understood that the larger the main-to-secondary image transmittance ratio Cr12, the smaller the transmittance TL2 is relatively, the less second refracted light T2 is received by the information acquisition device 200, making the secondary image less obvious or even almost invisible; conversely, the smaller the main-to-secondary image transmittance ratio Cr12, the larger the transmittance TL2 is relatively, the more second refracted light T2 is received by the information acquisition device 200, making the secondary image more obvious. The present application can increase the main-to-secondary image transmittance ratio Cr12 by adding a nano anti-reflection layer 20, so that when the incident angle θ of the incident light T0 is 45° to 75°, the Cr12 is ≥ 1000, thereby weakening or even eliminating the secondary image, so that the main image captured and processed by the information acquisition device 200 is not interfered by the secondary image, and the image data finally obtained is clear enough. Preferably, the Cr12≥2000, or the Cr12≥3000, or the Cr12≥5000, or the Cr12≥8000, or the Cr12≥10000, or the Cr12≥20000, or the Cr12≥50000, etc., which is conducive to making the secondary image almost disappear.

[0069] In order to meet the use requirements of high-pixel cameras, it is preferred that the information collection area S1 has a transmittance TL of at least 60% for visible light with a wavelength of 380nm to 780nm incident at an incident angle of 65°. (380-780) , more preferably at least 65% transmittance, further preferably at least 70% transmittance, further preferably at least 75% transmittance, even more preferably at least 80% transmittance, even more preferably at least 85% transmittance. TL (380-780) It is the transmittance of the information collection area S1 to visible light with a wavelength of 380nm to 780nm incident at an incident angle of 65°.

[0070] In order to meet the use requirements of high-pixel cameras, it is also preferred that the transmittance TL of the information collection area S1 for red light with a wavelength of 600nm to 700nm incident at an incident angle of 65° is (600-700) The transmittance TL of the information collection area S1 to the visible light with a wavelength of 380nm to 780nm incident at an incident angle of 65° (380-780) The ratio between them is greater than or equal to 0.8, that is, TL (600-700) / TL (380-780) ≥0.8, specifically 0.80, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, etc., more preferably TL (600-700) / TL (380-780) ≥0.83, further preferred TL (600-700) / TL (380-780) ≥0.85.TL (600-700) It is the transmittance of the information collection area S1 to red light with a wavelength of 600nm to 700nm incident at an incident angle of 65°.

[0071] In the present application, the information collection device 200 may be a visible light camera, and the visible light camera is selected from at least one of a standard camera, a narrow-angle camera, and a wide-angle camera. The field of view FOV of the visible light camera is the maximum field of view range when collecting image data, which can be divided into a horizontal field of view (HFOV, Horizontal Field of View) and a vertical field of view (VFOV, Vetical Field of View). Among them, the horizontal field of view HFOV of the standard camera ranges from 40°≤HFOV≤90°, and the maximum detection distance is less than or equal to 200 meters. The standard camera can be used as the main information collection device 200 in an advanced driving assistance system (ADAS, Advanced Driving Assistance System) or an autonomous driving system (ADS, Autonomous Driving System) above L2 level. The horizontal field of view HFOV of the narrow-angle camera ranges from HFOV<40°, and the maximum detection distance is less than or equal to 300 meters. Narrow-angle cameras are mainly used to identify distant objects, and can be used to identify targets such as traffic lights and pedestrians. The horizontal field of view (HFOV) of the wide-angle camera is in the range of 90°<HFOV≤180°, and the maximum detection distance is less than or equal to 80 meters. The wide-angle camera is mainly used to identify close objects and can be used in scenes such as urban road conditions and low-speed driving.

[0072] The visible light camera can be a low-pixel camera with less than 2 million pixels, for example, an 800,000-pixel camera or a 1-megapixel camera. The visible light camera can also be a high-pixel camera with pixels greater than or equal to 2 million, more preferably a high-pixel camera with pixels greater than or equal to 5 million, for example, a 2-megapixel camera, a 5-megapixel camera, an 8-megapixel camera, a 12-megapixel camera, a 20-megapixel camera, a 50-megapixel camera, a 100-megapixel camera, and a 200-megapixel camera. High-pixel cameras also have a longer detection distance and a larger horizontal field of view HFOV. High-pixel cameras also have a higher dynamic range (HDR, High Dynamic Range Imaging) and better LED flicker elimination function (LFM, Linear Frequency Modulation).

[0073] The number of the information collection device 200 may be, but is not limited to, one, two, three, four or more. Exemplarily, the information collection device 200 is a visible light camera, which is used to realize functions such as forward collision warning (FCW), lane departure warning (LDW), traffic sign recognition (TSR), and pedestrian collision warning (PCW).

[0074] See also Figure 3 In the present application, the information acquisition device 200 includes a housing 210, a lens assembly 220, an image sensor 230, an image signal processor, a serializer, and a connector. The lens assembly 220, the image sensor 230, the image signal processor, and the serializer are all located in the housing 210. The connector is connected to the housing 210.

[0075] Among them, the lens assembly 220 may include an optical lens, a filter and a protective film. Specifically, the optical lens is used to focus light and project the object in the field of view onto the photosensitive surface of the image sensor 230. Depending on the requirements of the imaging effect, there may be multiple layers of optical lenses. The filter is used to filter out the light band that is invisible to the human eye, leaving only the visible light band of the actual scene within the field of view of the human eye. The protective film is used to protect the optical lens and / or the filter to prevent the optical lens and / or the filter from being severely worn, which affects the clarity of the image data acquired by the information acquisition device 200.

[0076] The image sensor 230 can utilize the photoelectric conversion function of the photoelectric device to convert the light image on the photosensitive surface into an electrical signal that is proportional to the light image. The image sensor 230 is mainly divided into two types: CCD and CMOS. The image signal processor mainly uses the hardware structure to complete the pre-processing of the RAW format data of the image video source input by the image sensor 230, which can be converted into formats such as YCbCr. The image signal processor can also complete a variety of tasks such as image scaling, automatic exposure, automatic white balance, and automatic focusing. The serializer is used to transmit the processed image data, and can be used to transmit various types of image data such as RGB and YUV. The connector is used to connect the fixed information acquisition device 200.

[0077] For the convenience of description, after the vehicle window glass 100 is installed on the vehicle 1000 , the present application defines the direction extending from the bottom edge of the vehicle window glass 100 to the top edge of the vehicle window glass 100 as the vertical direction of the vehicle window glass 100 .

[0078] Please refer to Figure 4 and Figure 5The present application provides a first embodiment of a vehicle window glass 100. In this embodiment, the vehicle window glass 100 is a laminated glass. A nano anti-reflection layer 20 is directly formed on the surface of the laminated glass. The laminated glass includes an outer glass plate 11, an intermediate layer 12 and an inner glass plate 13, wherein the intermediate layer 12 is sandwiched between the outer glass plate 11 and the inner glass plate 13. The outer glass plate 11 includes a first surface 111 and a second surface 112 which are arranged in opposite directions. The first surface 111 serves as the outer surface of the vehicle window glass 100, the first surface 111 faces the outside of the vehicle 1000, and the second surface 112 faces the intermediate layer 12. The inner glass plate 13 includes a third surface 131 and a fourth surface 132 which are arranged in opposite directions. The third surface 131 faces the intermediate layer 12, and the fourth surface 132 serves as the inner surface of the vehicle window glass 100, and the fourth surface 132 faces the inside of the vehicle 1000. The intermediate layer 12 connects the second surface 112 and the third surface 131.

[0079] The outer glass plate 11 is transparent glass or tinted glass, the thickness of the outer glass plate 11 is 1.8 mm to 3.5 mm, and the visible light transmittance of the outer glass plate 11 is greater than or equal to 70%. The cross section of the outer glass plate 11 in the thickness direction (the cross section extends along the thickness direction of the outer glass plate 11) is rectangular or wedge-shaped. The inner glass plate 13 is transparent glass or tinted glass, the thickness of the inner glass plate 13 is 0.7 mm to 2.5 mm, and the visible light transmittance of the inner glass plate 13 is greater than or equal to 70%. The cross section of the inner glass plate 13 in the thickness direction (the cross section extends along the thickness direction of the inner glass plate 13) is rectangular or wedge-shaped. The total iron content (in terms of Fe2O3) of the transparent glass is less than or equal to 0.1%, or even less than or equal to 0.05%, or further less than or equal to 0.01%, and the visible light transmittance of the transparent glass is 80% to 95%; the total iron content (in terms of Fe2O3) of the tinted glass is 0.1% to 0.8%, preferably 0.1% to 0.5%, and the visible light transmittance of the tinted glass is 70% to 90%. For example, the outer glass plate 11 can be a transparent glass with a thickness of 2.1 mm and a visible light transmittance of 89%, and the inner glass plate 13 can be a green glass with a thickness of 1.6 mm and a visible light transmittance of 83%, or a green glass with a thickness of 2.1 mm and a visible light transmittance of 80%.

[0080] The intermediate layer 12 is a transparent thermoplastic polymer film or a colored thermoplastic polymer film, and the thickness of the intermediate layer 12 is 0.38 mm to 2.28 mm. For example, the thickness of the intermediate layer 12 can be, but is not limited to, 0.38 mm, 0.76 mm, 1.14 mm, 1.52 mm, 1.9 mm, 2.28 mm, or other values ​​between 0.38 mm and 2.28 mm. The cross section of the intermediate layer 12 in the thickness direction (the cross section extends along the thickness direction of the intermediate layer 12) is rectangular or wedge-shaped. The material of the thermoplastic polymer film can be selected from at least one of polyvinyl butyral (PVB), polyurethane (PU), ethylene-vinyl acetate copolymer (EVA) and ionomer (SentryGlasPlus, SGP). When the middle layer 12 is a transparent thermoplastic polymer, the visible light transmittance of the transparent thermoplastic polymer is greater than or equal to 80%. For example, the visible light transmittance of the middle layer 12 can be, but not limited to, 80%, 85%, 90%, 95%, etc. When the middle layer 12 is a colored thermoplastic polymer film, the visible light transmittance of the colored thermoplastic polymer film is greater than or equal to 80%. For example, the visible light transmittance of the middle layer 12 can be, but not limited to, 80%, 85%, 90%, etc. The colored thermoplastic polymer film can be a gray thermoplastic polymer film, a green thermoplastic polymer film, or a blue thermoplastic polymer film. Exemplarily, the middle layer 12 can be a single-layer structure or a multi-layer structure. The multi-layer structure can be exemplified by a double-layer structure, a three-layer structure, a four-layer structure, a five-layer structure, etc. The middle layer 12 may also have other functions, such as providing at least one colored area to serve as a shadow band to reduce the interference of sunlight to the human eye, or adding an infrared absorber to provide sun protection or heat insulation functions, or adding an ultraviolet absorber to provide ultraviolet isolation functions, or at least one layer of the multilayer structure has a higher plasticizer content to provide a sound insulation function.

[0081] See also Figure 6, the vehicle window glass 100 has an information collection area S1 and a non-information collection area S2. The information collection device 200 captures the driving environment outside the vehicle 1000 through the information collection area S1 and processes it into image data, and the light outside the vehicle 1000 passes through the information collection area S1 and is received by the information collection device 200. The non-information collection area S2 includes a transparent area S21 and a shielding area S22. The visible light transmittance of the transparent area S21 is greater than or equal to 70%, so that the occupants can observe the environment outside the vehicle through the transparent area S21. The visible light transmittance of the shielding area S22 is less than or equal to 5%, so as to play a role in shielding, protection and improving the overall aesthetics; preferably, the visible light transmittance of the shielding area S22 is less than or equal to 3%, more preferably less than or equal to 1%, further less than or equal to 0.5%, or even almost equal to 0, that is, it is not transparent. Optionally, the shielding area S22 is arranged around the circumference of the transparent area S21. Further optionally, the shielding area S22 is also arranged around the circumference of the information collection area S1.

[0082] Specifically, the shielding area S22 may be formed by a shielding layer, and the shielding layer is provided on at least one of the second surface 112, the third surface 131, and the fourth surface 132. The material of the shielding layer may be ceramic ink or ultraviolet ink, and the ceramic ink or ultraviolet ink is printed on the second surface 112, the third surface 131, and / or the fourth surface 132 by screen printing, inkjet printing, or other processes, and the shielding layer is formed after curing or high-temperature sintering, and the thickness of the shielding layer is 5 μm to 40 μm.

[0083] It should be noted that the information collection device 200 can be directly fixed on the inner surface of the laminated glass, that is, fixed on the fourth surface 132, through a connector (such as a camera bracket, etc.), so as to facilitate the integration of the information collection system 300. In other embodiments, the information collection device 200 can also be fixed on the vehicle body 400 through a connector.

[0084] A first laminated glass consisting of an outer glass plate 11, an intermediate layer 12 and an inner glass plate 13 is prepared, wherein the outer glass plate 11 and the inner glass plate 13 are both transparent glass with a thickness of 2.1 mm and a refractive index of 1.52, and the intermediate layer 12 is transparent PVB with a thickness of 0.76 mm and a refractive index of 1.49. Another second laminated glass consisting of an outer glass plate 11, an intermediate layer 12 and an inner glass plate 13 is prepared, wherein the outer glass plate 11 and the inner glass plate 13 are both green glass with a thickness of 2.1 mm and a refractive index of 1.52, and the intermediate layer 12 is transparent PVB with a thickness of 0.76 mm and a refractive index of 1.49. According to standard GB9656, a spectrophotometer (company: PERKINELMER, model: LAMBDA950) is used to measure: the transmittance of the first laminated glass to visible light at vertical incidence (incident angle of 0) is 88.8%, and the transmittance of the second laminated glass to visible light at vertical incidence (incident angle of 0) is 74.6%. The light outside the vehicle 1000, i.e., the incident light T0, undergoes multiple refractions and reflections when passing through the laminated glass and entering the interior of the vehicle 1000. The refraction angle, reflectance, transmittance, and light intensity of the light at each interface of the laminated glass can be calculated using Snell's Law, Fresnel Formula, and Beer-Lambert Law. Assume that a nano anti-reflection layer 20 is provided on the inner surface of the first laminated glass to form a first vehicle window glass. Assume that a nano anti-reflection layer 20 is provided on the inner surface of the second laminated glass to form a second vehicle window glass.

[0085] For the convenience of description, the reflectivity of the inner surface provided with the nano anti-reflection layer 20 is referred to as the reflectivity of the nano anti-reflection layer 20. According to the above three laws, the Cr12 values ​​of the first window glass and the second window glass in an ideal state are calculated to know that: under a specific glass combination and incident angle, as the visible light reflectivity of the nano anti-reflection layer 20 decreases, the main-to-sub image transmittance Cr12 shows a monotonically increasing trend. This is because the transmittance of the first refracted light T1 increases and the transmittance of the second refracted light T2 decreases. Taking the first window glass as an example, when the incident angle is 45° and the visible light reflectivity of the nano anti-reflection layer 20 is 2.0%, the main-to-sub image transmittance Cr12 = 1057; when the incident angle is 75°, the visible light reflectivity of the nano anti-reflection layer 20 needs to be less than 0.48% to make the main-to-sub image transmittance Cr12 greater than 1000:1. Taking the second window glass as an example, when the incident angle is 45° and the visible light reflectivity of the nano anti-reflection layer 20 is 2.0%, the main-to-sub image transmittance Cr12=1565; when the incident angle is 75°, the visible light reflectivity of the nano anti-reflection layer 20 needs to be less than 0.75% to make the main-to-sub image transmittance Cr12 greater than 1000:1.

[0086] For a specific glass combination, when the visible light reflectivity of the nano anti-reflection layer 20 remains unchanged, the main-secondary image transmittance Cr12 tends to decrease with the increase of the incident angle θ. This is because the reflectivity of the light at the interface of the laminated glass increases, the transmittance of the first refracted light T1 decreases, and the transmittance of the second refracted light T2 increases.

[0087] Under the conditions of the visible light reflectivity and incident angle of the specific nano anti-reflection layer 20, the visible light transmittance of the second window glass is smaller than that of the first window glass, and the primary and secondary image transmittance Cr12 of the second window glass is larger. This is because the outer glass plate 11 and the inner glass plate 13 of the second window glass are both tinted glass, and the outer glass plate 11 and the inner glass plate 13 are absorptive to visible light, the transmittance of the second refracted light T2 is relatively reduced more, and the primary and secondary image transmittance Cr12 is increased more. Therefore, reducing the visible light transmittance of the laminated glass is conducive to enabling the window glass 100 to obtain a larger primary and secondary image transmittance Cr12.

[0088] In summary, for different glass combinations and different incident angles, the visible light reflectivity of the nano anti-reflection layer 20 corresponding to the predetermined primary-secondary image transmittance Cr12 is different. Through the coordination of the glass combination, the incident angle and the visible light reflectivity of the nano anti-reflection layer 20, the primary-secondary image transmittance Cr12 can be greater than 1000:1, the secondary image will become sufficiently dim, and the image captured by the information collection device 200 will be significantly clear.

[0089] Please refer to Figure 7 , Figure 8 and Fig. 9 In this embodiment, the nano anti-reflection layer 20 includes a plurality of nano cones 21. The nano cones 21 are all cone-shaped and are arranged periodically.

[0090] See also Fig. 9, the heights of the multiple nanocones 21 are the same, and the heights of the multiple nanocones 21 are all H. The height of the nanocone 21 refers to the distance between the top and the bottom of the nanocone 21. The refractive index of the nano anti-reflection layer 20 is equivalent to a multilayer film with a gradient refractive index. The larger the H value, the smoother the gradient refractive index changes, and the smaller the Fresnel reflection caused by the sudden change of the refractive index of polarized light, which is conducive to making the nano anti-reflection layer 20 have excellent low reflectivity under wide-angle incident light. However, the larger the H value, the worse the mechanical strength of the nanocone 21. For example, the nanocone 21 is prone to brittle fracture, resulting in a decrease in the wear resistance of the nano anti-reflection layer 20; the production difficulty of the nanocone 21 will also increase. In addition, the larger the H value, the nanocone 21 will also scatter short-wavelength light, resulting in an increase in the reflection of short-wavelength light. Taking all factors into consideration, in order to achieve high-efficiency antireflection in the visible light band (380nm-780nm) and near-infrared band (900nm-1700nm), the height H of the nanocones 21 is in the range of 200nm≤H≤500nm. Preferably, the height H is in the range of 350nm≤H≤450nm.

[0091] The periodic spacing of the multiple nanocones 21 is P, that is, the spacing between the central axes Q of two adjacent nanocones 21. The periodic spacing P of the nanocones 21 needs to match the wavelength range for which anti-reflection is to be achieved, otherwise, the periodic spacing P of the nanocones 21 is greater than the wavelength of the incident light T0, which will lead to a decrease in transmittance, that is, a decrease in the anti-reflection effect. In this embodiment, in order to achieve efficient anti-reflection in the visible light band (380nm~780nm) and the near-infrared band (900nm~1700nm), the periodic spacing P≤380nm. Taking into account the influence of the production and manufacturing process on the periodic spacing P, the periodic spacing P of the multiple nanocones 21 is ≤350nm.

[0092] The anti-reflection principle of the multiple nanocones 21 is: when the periodic spacing of the multiple nanocones 21 is smaller than the wavelength of the incident light, all diffractions except the zero-order diffraction can be suppressed, that is, only zero-order reflected light will be generated optically, and its optical properties can be regarded as a homogeneous film according to the equivalent medium theory, and its structural refractive index is equivalent to a multilayer film with a gradient refractive index; the initial refractive index of light in the air is 1, and then as it propagates downward from the tips of the multiple nanocones 21, the refractive index gradually increases, and finally reaches the maximum at the bottom of the multiple nanocones 21, thus avoiding a sharp change in the refractive index, thereby reducing the surface reflectivity.

[0093] The preparation method of the plurality of nanocones 21 includes an inclined deposition method, dry etching, wet etching, etc. The basic principle is to achieve a gradient change in the refractive index by changing the filling factor of a certain dielectric material and air.

[0094] Among them, oblique angle deposition (OAD) refers to a method of depositing thin films at a certain angle (such as 50° or 70°) by oblique incidence, and by controlling deposition parameters (deposition oblique angle, deposition rate, distance between substrate and evaporation source, etc.), thereby obtaining a method of depositing nanostructures with oblique or special morphologies, and then obtaining a film layer with the desired refractive index. Deposition methods include thermal evaporation, magnetron sputtering, ion-assisted electron beam deposition, laser pulse deposition, plasma-enhanced chemical vapor deposition and other deposition technologies.

[0095] Dry etching includes electron beam lithography, interference lithography and nanosphere lithography. Among them, electron beam lithography is a technology that uses electron beam to directly draw or project copy patterns in polymer mask electronic resist layer. Interference lithography is based on laser beam interference to produce periodic patterns in photoresist. This method can form specific patterns on a large area, making it expandable to large-scale applications. Nanosphere lithography is to use a single layer of nano colloids arranged periodically or approximately periodically as an etching mask, and the uncovered substrate is etched to form a nanostructure. The morphology specifications of the nanostructure are controlled by parameters such as the size, material, etching power, and etching time of the colloid spheres. For example, using a single layer of polystyrene (PS, Polystyrene) nanospheres as a mask, reactive ion beam etching is used to etch a specific nano cone array structure. Usually, PS nanospheres are closely adjacent to each other. Since the mask is almost defective, this self-assembly technology is more likely to produce large-scale nanostructures with high yield.

[0096] Wet etching is the process of corroding the surface of a material using specific chemical reagents to form a microstructure of a specific pattern. It is usually matched with masks of different shapes to prepare nanostructures of specific morphology. Wet etching includes chemical and electrochemical methods.

[0097] The multiple nanocones 21 provided in the present application can have excellent broadband low reflectivity and high transmittance under wide-angle incident light, and are less affected by the polarization state, so they are suitable for various applications from visible light to near-infrared waves. Preferably, the nano anti-reflection layer 20 formed by the multiple nanocones 21 has a reflectivity of less than or equal to 0.5% in the visible light band of 380nm to 780nm, further has a reflectivity of less than or equal to 0.1%, and further has a reflectivity of less than or equal to 0.05%. In other embodiments, the nano anti-reflection layer 20 formed by the multiple nanocones 21 has a reflectivity of less than or equal to 1% in the infrared band of 905nm, further has a reflectivity of less than or equal to 0.5%, and further has a reflectivity of less than or equal to 0.1%. In some other embodiments, the nano anti-reflection layer 20 formed by the plurality of nanocones 21 has a reflectivity less than or equal to 1% in the infrared band of 1550 nm, further has a reflectivity less than or equal to 0.8%, and further has a reflectivity less than or equal to 0.65%.

[0098] The diameters of the multiple nanocones 21 are the same, and the diameters of the multiple nanocones 21 are all D. The diameter D of the nanocone 21 refers to the diameter of the bottom of the nanocone 21. The smaller the diameter D of the nanocone 21, the worse the anti-reflection effect. In this embodiment, the diameter D of the nanocone 21 is approximately equal to the periodic spacing P of the multiple nanocones 21. The ratio D / P of the diameter D of the multiple nanocones 21 to the periodic spacing P of the multiple nanocones 21 is in the range of: 0.8≤D / P≤1.2.

[0099] The shape of the multiple nanocones 21 can be a pointed cone or a round cone. When the periodic spacing P of the multiple nanocones 21 is ≤380nm, and the range of the height H of the nanocones 21 is: 200nm≤H≤500nm, the transmittance of the nano anti-reflection layer 20 formed by the periodic arrangement of the nanocones 21 of the two shapes in the visible light band (380nm~780nm) and the near-infrared band (900nm~1700nm) is roughly the same, with only a slight fluctuation in some bands, and the transmittance difference at long wavelengths (such as 1500nm) will increase. The above two shapes of nanocones 21 can also be mixed in a certain proportion, and the two shapes of nanocones 21 are arranged periodically. For example, the ratio of the number of nanocones 21 with a pointed cone and the nanocones 21 with a round cone is 1:1, and the nanocones 21 with a pointed cone and the nanocones 21 with a round top shape are arranged alternately, which can make the nano anti-reflection layer 20 have a high transmittance in a wider band range.

[0100] Please continue reading Figure 4In this embodiment, at least one of the first surface 111, the second surface 112, the third surface 131 or the fourth surface 132 of the laminated glass is provided with a nano anti-reflection layer 20. The nano anti-reflection layer 20 covers the information collection area S1. The nano anti-reflection layer 20 is directly formed on the surface of the laminated glass. The plurality of nano cones 21 may be directly provided on the surface of the laminated glass, or the plurality of nano cones 21 may be formed by etching the surface of the laminated glass.

[0101] When multiple nanocones 21 are directly disposed on the surface of laminated glass, for the material of the nanocones 21, considering that reflection will occur at the interface of different media, the multiple nanocones 21 preferably select a material with the same or similar refractive index as the glass plate on which they are located. More preferably, the refractive index of the nanocones 21 is less than or equal to the refractive index of the glass plate on which they are located. Exemplarily, the refractive index of the glass plate on which the multiple nanocones 21 are located is 1.52, and the material of the nanocones 21 can be ultraviolet fused quartz. The main component of ultraviolet fused quartz is SiO2, and the refractive index of ultraviolet fused quartz is 1.46.

[0102] In this embodiment, the laminated glass may be a complete structure or an incomplete structure with through grooves partially provided therein.

[0103] In a first possible implementation, Figure 4 , the laminated glass is a complete structure. The nano anti-reflection layer 20 can be directly formed on the first surface 111, the second surface 112, the third surface 131 or the fourth surface 132. Preferably, the nano anti-reflection layer 20 is arranged on the first surface 111 or the fourth surface 132. Further preferably, considering the wear resistance of the nano anti-reflection layer 20, the nano anti-reflection layer 20 is usually arranged on the fourth surface 132 of the laminated glass. The assembly process of the laminated glass is: the outer glass plate 11 and the inner glass plate 13 are bent and formed by a pressing process respectively; the outer glass plate 11 and the inner glass plate 13 are connected by the intermediate layer 12 to form the laminated glass.

[0104] It can be understood that, compared with the solution of designing the laminated glass partially into a wedge shape in the prior art, the nano anti-reflection layer 20 in this embodiment has a broadband low reflectivity and high transmittance for incident light in a wide angle range, and the nano anti-reflection layer 20 has stronger compatibility and better versatility for various vehicle installation angles of the window glass 100 and different types of information collection devices 200; that is, the nano anti-reflection layer 20 of the same specification can be applied to a variety of application scenarios. Compared with the solution of setting a correction component in the prior art, the nano anti-reflection layer 20 in this embodiment can be set on multiple surfaces of the window glass 100, and the setting position of the nano anti-reflection layer 20 is more flexible; and there is no need to open a hole in the window glass 100 specifically for the nano anti-reflection layer 20 to ensure the structural strength of the window glass 100. Compared with the solution of setting a polarizing plate in the prior art, the nano anti-reflection layer 20 in this embodiment reduces the brightness of the second refracted light T2 while increasing the brightness of the first refracted light T1, so there is no need to optimize the imaging effect of the main image by optimizing the exposure value, improving the sensitivity of the image sensor 230, etc. Compared with the prior art of forming an anti-reflection film on the window glass 100, the nano anti-reflection layer 20 in this embodiment has a better anti-reflection effect and a simple structure.

[0105] In a second possible implementation, Fig.10 The middle layer 12 is provided with a first through groove 122. Along the thickness direction of the laminated glass, the first through groove 122 penetrates the two surfaces of the middle layer 12 that are arranged opposite to each other. Along the thickness direction of the window glass 100, the orthographic projection of the first through groove 122 on the second surface 112 of the outer glass plate 11 completely covers the information collection area S1.

[0106] The nano anti-reflection layer 20 may be disposed on the first surface 111, the second surface 112, the third surface 131 or the fourth surface 132. Preferably, considering the wear resistance of the nano anti-reflection layer 20, the nano anti-reflection layer 20 is usually disposed on other surfaces except the first surface 111 of the glass plate 11. The number of the nano anti-reflection layers 20 may be one, two or three. Exemplarily, the number of the nano anti-reflection layer 20 is one. The nano anti-reflection layer 20 is disposed on the fourth surface 132 of the laminated glass. The number of the nano anti-reflection layers 20 is two. One nano anti-reflection layer 20 is disposed on the fourth surface 132, and the other nano anti-reflection layer 20 is located in the first through groove 122 and is disposed on the second surface 112 or the third surface 131. Preferably, the number of the nano anti-reflection layers 20 is three. One nano anti-reflection layer 20 is disposed on the fourth surface 132 , and the other two nano anti-reflection layers 20 are both located in the first through groove 122 . One nano anti-reflection layer 20 located in the first through groove 122 is disposed on the third surface 131 , and the other nano anti-reflection layer 20 located in the through groove 122 is disposed on the second surface 112 .

[0107] It can be understood that by providing the first through groove 122 in the middle layer 12, and along the thickness direction of the vehicle window glass 100, the orthographic projection of the first through groove 122 on the second surface 112 of the outer glass plate 11 completely covers the information collection area S1, and the microscopic height difference of the middle layer 12 has almost no effect on the parallelism of the portion of the first surface 111 of the outer glass plate 11 located in the information collection area S1 and the portion of the fourth surface 132 of the inner glass plate 13 located in the information collection area S1. Therefore, compared with the case where the first through groove 122 is not provided, the portion of the first surface 111 of the outer glass plate 11 located in the information collection area S1 and the portion of the fourth surface 132 of the inner glass plate 13 located in the information collection area S1 have better parallelism. Therefore, it is beneficial to reduce the optical distortion of the vehicle window glass 100.

[0108] Arranging the nano anti-reflection layer 20 on the second surface 112, the third surface 131 and / or the fourth surface 132 of the vehicle window glass 100 can improve the broadband transmittance of the vehicle window glass 100. Since the thickness of the nano anti-reflection layer 20 is extremely thin, the nano anti-reflection layer 20 will hardly have an adverse effect on the degree of light distortion of the vehicle window glass 100. In this way, it is possible to achieve both weakened secondary images and lower light distortion. When there are multiple nano anti-reflection layers 20, the multiple nano anti-reflection layers 20 work together to further improve the broadband transmittance of the vehicle window glass 100.

[0109] In a third possible implementation, Fig.11 , the laminated glass is provided with a first through groove 122 and a second through groove 133. The first through groove 122 is provided in the middle layer 12. Along the thickness direction of the laminated glass, the first through groove 122 penetrates the two surfaces of the middle layer 12 that are arranged opposite to each other. The second through groove 133 is provided in the inner glass plate 13. Along the thickness direction of the laminated glass, the second through groove 133 penetrates the third surface 131 and the fourth surface 132 of the inner glass plate 13. Along the thickness direction of the vehicle window glass 100, the orthographic projection of the first through groove 122 on the second surface 112 of the outer glass plate 11 completely covers the information collection area S1, and the orthographic projection of the second through groove 133 on the second surface 112 of the outer glass plate 11 completely covers the information collection area S1, and the first through groove 122 is connected to the second through groove 133.

[0110] The nano anti-reflection layer 20 can be disposed on the first surface 111 or the second surface 112. Preferably, considering the wear resistance of the nano anti-reflection layer 20, the nano anti-reflection layer 20 is usually disposed in the first through groove 122 and on the second surface 112 of the outer glass plate 11.

[0111] It can be understood that in this embodiment, by providing the first through groove 122 at the position of the intermediate layer 12 corresponding to the information collection area S1, and providing the second through groove 133 at the position of the inner glass plate 13 corresponding to the information collection area S1, the outer glass plate 11 is kept intact, so that the information collection area S1 of the vehicle window glass 100 can be thinned. When light passes through the information collection area S1 and enters the interior of the vehicle 1000, it only needs to pass through the first surface 111 and the second surface 112 of the outer glass plate 11. Compared with the consistency of the first surface 111 of the outer glass plate 11 and the fourth surface 132 of the inner glass plate 13, the consistency of the first surface 111 and the second surface 112 of the outer glass plate 11 is better, which is conducive to reducing the light distortion of the vehicle window glass 100. Generally, the light distortion of the vehicle window glass 100 in this embodiment can reach 35mdpt or even lower.

[0112] On the basis of thinning the information collection area S1 of the vehicle window glass 100, a nano anti-reflection layer 20 is disposed on the second surface 112 of the outer glass plate 11. Since the thickness of the nano anti-reflection layer 20 is extremely thin, the nano anti-reflection layer 20 will hardly have an adverse effect on the light distortion degree of the vehicle window glass 100. In this way, both the secondary image can be weakened and lower light distortion can be achieved.

[0113] In a fourth possible implementation, the cross section of the information collection area S1 of the vehicle window glass 100 along the vertical direction is wedge-shaped. The wedge angle of the information collection area S1 can make the secondary image deviation angle (the angle between the first refracted light T1 and the second refracted light T2) of the information collection area S1 less than or equal to 3 arcmin. It can be understood that from the top to the bottom of the information collection area S1, the thickness of the information collection area S1 along the vertical direction gradually decreases; that is, the first surface 111 of the outer glass plate 11 and the fourth surface 132 of the inner glass plate 13 are relatively inclined at least in the information collection area S1. It can be that one or more of the outer glass plate 11, the intermediate layer 12 and the inner glass plate 13 have a wedge-shaped cross section at least in the information collection area S1 along the vertical direction, so that the information collection area S1 is wedge-shaped as a whole. Exemplarily, the cross section of the outer glass plate 11 at least in the information collection area S1 along the vertical direction is wedge-shaped, and the wedge angle of the outer glass plate 11 ranges from 0.03mrad to 0.40mrad. For example, the wedge angle of the outer glass plate 11 may be 0.03 mrad, 0.13 mrad, 0.23 mrad, 0.33 mrad, 0.40 mrad, etc. The cross sections of the intermediate layer 12 and the inner glass plate 13 along the vertical direction are both rectangular.

[0114] The nano anti-reflection layer 20 can be directly formed on the first surface 111, the second surface 112, the third surface 131 or the fourth surface 132. Preferably, the nano anti-reflection layer 20 is disposed on the first surface 111 or the fourth surface 132. Further preferably, considering the wear resistance of the nano anti-reflection layer 20, the nano anti-reflection layer 20 is usually disposed on the fourth surface 132 of the laminated glass.

[0115] It is understandable that the nano anti-reflection layer 20 is provided in the information collection area S1 to reduce the secondary image. In this embodiment, by designing the cross section of the information collection area S1 of the vehicle window glass 100 in the vertical direction to be wedge-shaped, the wedge angle of the information collection area S1 can make the deviation angle of the secondary image of the information collection area S1 less than or equal to 3 arcmin, thereby improving the overlap between the secondary image and the primary image, thereby further reducing the interference of the secondary image on the primary image, and improving the clarity of the image acquired by the information collection device 200.

[0116] In other embodiments, the vehicle window glass 100 may also be a monolithic glass. Preferably, the vehicle window glass 100 is a monolithic strengthened glass. Exemplarily, the vehicle window glass 100 is a monolithic tempered glass. The monolithic glass has an outer surface and an inner surface. Among them, the outer surface of the monolithic glass is the outer surface of the vehicle window glass 100, and the outer surface of the monolithic glass faces the outside of the vehicle 1000. The inner surface of the monolithic glass is the inner surface of the vehicle window glass 100, and the inner surface of the monolithic glass faces the inside of the vehicle 1000. The nano anti-reflection layer 20 can be provided on the outer surface or the inner surface of the monolithic glass.

[0117] Please refer to Fig. 9 and Fig.12 In this embodiment, the central axes Q of the plurality of nanocones 21 and the normal line O of the window glass 100 may be parallel to each other or may be arranged at an angle.

[0118] In a possible implementation, Fig. 9 As shown, the central axes Q of the plurality of nanocones 21 are parallel to the normal line O of the vehicle window glass 100 (a certain process tolerance is allowed).

[0119] In another possible implementation, Fig.12 , the central axes Q of the plurality of nanocones 21 are all tilted relative to the normal line O of the window glass 100 toward the lens assembly 220 of the information collection device 200. The angles between the central axes Q of the plurality of nanocones 21 and the normal line O of the laminated glass are all β. β should not be too large, otherwise it is easy to cause uneven void ratio at the bottom of the nanocones 21 and increase the difficulty of manufacturing, thereby causing a decrease in the anti-reflection effect of the nano anti-reflection layer 20.

[0120] In order to simplify the calculation, the angle between the main axis light L (i.e., the light at the center of the field of view of the information collection device 200) and the normal O of the laminated glass within the field of view of the information collection device 200 is set to be an inclined incident angle α. β = α / 2. On the basis of considering the compatibility of the nano anti-reflection layer 20 with different types of information collection devices 200, in order to make the nano anti-reflection layer 20 have a low reflectivity within a wide angle range, β = α / 2 ± 30°, or β = α / 2 ± 20°, or β = α / 2 ± 10°. For example, if α = 70°, β can be selected from 5° to 65°, or β can be selected from 15° to 55°, or β can be selected from 25° to 45°.

[0121] It can be understood that by tilting the central axes Q of the multiple nanocones 21 relative to the normal O of the laminated glass toward the lens assembly 220 of the information collection device 200, the angle between the light incident at a high incident angle and the central axes Q of the multiple nanocones 21 can be reduced, thereby reducing the reflectivity of the information collection area S1 of the window glass 100 for light incident at a high angle (such as an incident angle of 70°).

[0122] It should be noted that Fig. 9 and Fig.12 In the figure, the nano anti-reflection layer 20 is disposed on the fourth surface 132 as an example to illustrate the extension direction of the central axis Q of the plurality of nanocones 21, which does not limit the specific location of the nano anti-reflection layer 20. It can be understood that the nano anti-reflection layer 20 can also be disposed on the first surface 111, the second surface 112, and the third surface 131.

[0123] In this embodiment, Fig.13 In order to improve the anti-reflection effect of the vehicle window glass 100, a nano anti-reflection layer 20 is usually provided on the outer surface of the vehicle window glass 100 and other surfaces of the vehicle window glass 100. Under the same test conditions, the anti-reflection effect of the nano anti-reflection layer 20 provided on other surfaces of the vehicle window glass 100 is better than that of the nano anti-reflection layer 20 provided on the outer surface of the vehicle window glass 100.

[0124] When the nano anti-reflection layer 20 is disposed on the outer surface of the vehicle window glass 100, the shape of the multiple nanocones 21 is preferably a circular cone. The periodic spacing of the multiple nanocones 21 is preferably 100nm≤P≤380nm. Further preferably, 100nm≤P≤350nm, or 100nm≤P≤300nm, or 100nm≤P≤200nm. The range of the ratio of the diameter D of the multiple nanocones 21 to the periodic spacing P is preferably 0.9≤D / P≤1.1. The ratio of the height H of the multiple nanocones 21 to the diameter D of the multiple nanocones 21 is H / D≤0.5. Preferably, H / D≤0.4. It can be understood that the smaller H / D is, the better the mechanical properties of the nano anti-reflection layer 20 formed by the multiple nanocones 21.

[0125] It is understandable that when the anti-reflection effect of the vehicle window glass 100 is required to be high, only providing the nano anti-reflection layer 20 on a single surface of the vehicle window glass 100 may not meet the anti-reflection requirement of the vehicle window glass 100. By providing the nano anti-reflection layer 20 on the outer surface of the laminated glass at the same time, the anti-reflection effect of the vehicle window glass 100 can be further improved.

[0126] See also Fig.14 The present application provides a second embodiment of a vehicle window glass 100. The difference between this embodiment and the first embodiment is that the vehicle window glass 100 further includes a substrate 50. The nano anti-reflection layer 20 is indirectly connected to the laminated glass through the substrate 50.

[0127] It should be noted that, in this embodiment, only the example of the nano anti-reflection layer 20 being connected to the fourth surface 132 of the laminated glass through the substrate 50 is used for description, and the nano anti-reflection layer 20 being connected to any other surface of the laminated glass through the substrate 50 can be used as a reference.

[0128] In this embodiment, the substrate 50 can be optical glass or optical plastic. The refractive index of the substrate 50 is similar to the material of the glass plate of the laminated glass to which it is connected. The transmittance of the substrate 50 in the visible light band (380nm~780nm) is greater than or equal to 70%, and the substrate 50 has flatness, that is, the thickness of the central area and the peripheral area of ​​the substrate 50 is the same. The thickness of the substrate 50 is generally less than or equal to 5.0mm. The material of the substrate 50 includes but is not limited to cycloolefin copolymer (COC, Cyclo-Olefin Copolymer), cycloolefin polymer (COP, Cyclo Olefin Polymer), polymethyl methacrylate (PMMA, Polymethyl Methacrylate), polycarbonate (PC, Polycarbonate), polyetherimide (PEI, Polyetherimide), polystyrene (PS, Polystyrene), styrene and acrylate copolymer (SAC, Styreneacrylate copolymer) and methylpentene copolymer (PMP, Poly(4-methylpentene-1)). For example, the substrate 50 may be a 0.3 mm transparent glass layer; or, the substrate 50 may be a 0.5 mm COC layer.

[0129] The substrate 50 includes a first surface 51 and a second surface 52. Along the thickness direction of the substrate 50, the first surface 51 and the second surface 52 are arranged in opposite directions. A plurality of nanocones 21 are arranged on the first surface 51 of the substrate 50. The substrate 50 is laminated on the fourth surface 132 of the laminated glass, and the second surface 52 of the substrate 50 faces the laminated glass. The substrate 50 covers the information collection area S1. It can be understood that the plurality of nanocones 21 are arranged on one side surface of the substrate 50, and the other side surface of the substrate 50 is connected to the surface of the laminated glass. The substrate 50 can be attached to the surface of the laminated glass, usually by optical adhesive.

[0130] A plurality of nanocones 21 are disposed on the first surface 51 of the substrate 50, such as Fig.14 , including directly disposing a plurality of nanocones 21 on the first surface 51 of the substrate 50 , and also including etching the first surface 51 of the substrate 50 to form a plurality of nanocones 21 .

[0131] When the plurality of nanocones 21 are directly disposed on the surface of the substrate 50, the material of the nanocones 21 is preferably a material having the same or similar refractive index as the substrate 50, considering that reflection may occur at the interface of different media. For example, the refractive index of the substrate 50 is 1.52, and the material of the nanocones 21 may be ultraviolet fused quartz. The main component of ultraviolet fused quartz is SiO2, and the refractive index of ultraviolet fused quartz is 1.46.

[0132] It is understandable that the bending state of the substrate 50 is set according to the curvature state of the surface of the laminated glass bonded to the substrate 50, so that the substrate 50 has a higher degree of bonding with the surface of the laminated glass, and the optical performance of the vehicle window glass 100 is better. By forming the nano anti-reflection layer 20 on the substrate 50, the substrate 50 and the nano anti-reflection layer 20 can be attached to the laminated glass together after the nano anti-reflection layer 20 is formed on the surface of the substrate 50. Compared with directly forming the nano anti-reflection layer 20 on the surface of the laminated glass, the operation is more convenient, the process is simple, and it is conducive to saving processing costs.

[0133] See also Fig.15 The present application provides a third embodiment of a vehicle window glass 100. The difference between this embodiment and the first embodiment is that the vehicle window glass 100 further includes a transition layer 60. The nano anti-reflection layer 20 is indirectly connected to the laminated glass through the transition layer 60.

[0134] It should be noted that, in this embodiment, only the connection between the nano anti-reflection layer 20 and the fourth surface 132 of the laminated glass through the transition layer 60 is used as an example for description, and the connection between the nano anti-reflection layer 20 and any other surface of the laminated glass through the transition layer 60 can be referred to.

[0135] In this embodiment, the transition layer 60 includes a third surface 61 and a fourth surface 62. Along the thickness direction of the transition layer 60, the third surface 61 and the fourth surface 62 are arranged in back-to-back relationship. A plurality of nanocones 21 are directly arranged on the third surface 61 of the transition layer 60. The transition layer 60 is laminated on the fourth surface 132 of the laminated glass, and the fourth surface 62 of the transition layer 60 faces the laminated glass. The transition layer 60 covers the information collection area S1. It can be understood that the plurality of nanocones 21 are arranged on one side surface of the transition layer 60, and the other side surface of the transition layer 60 is connected to the surface of the laminated glass.

[0136] It should be noted that in this embodiment, the transition layer 60 is described as a whole. The transition layer 60 can be a single-layer structure or a multi-layer structure. The material of the transition layer 60 includes but is not limited to non-metallic oxides, metal oxides or metals. Exemplarily, the transition layer 60 can be a coating structure in which high refractive index layers and low refractive index layers are alternately arranged, and the transition layer 60 has an anti-reflection effect. Among them, the high refractive index layer can be a metal oxide or a non-metallic oxide, such as the high refractive index layer is Al2O3; the low refractive index layer can be a metal oxide or a non-metallic oxide, such as the low refractive index layer is SiO2.

[0137] It is understandable that, usually, the material of the multiple nanocones 21 is preferably selected from a material with the same refractive index as the glass plate on which they are set. Considering from multiple angles such as the preparation process, production equipment, mechanical properties or chemical properties of the nano anti-reflection layer 20 and the anti-reflection effect that the nano anti-reflection layer 20 can achieve, the material of the multiple nanocones 21 can also be different from the material of the glass plate on which they are set. When the material of the multiple nanocones 21 is different from the glass plate on which they are set, by setting a transition layer 60 between the surface of the laminated glass and the nano anti-reflection layer 20, it can play a transition role between the nano anti-reflection layer 20 and the surface of the laminated glass, improve the anti-reflection effect of the nano anti-reflection layer 20, and can also combine the optical design of the nano anti-reflection layer 20 and the transition layer 60 to further reduce the broadband reflectivity of the vehicle window glass 100.

[0138] See also Fig.16 The present application provides a fourth embodiment of a vehicle window glass 100. The difference between this embodiment and the first embodiment is that the vehicle window glass 100 further includes a substrate 50 and a transition layer 60. The nano anti-reflection layer 20 is indirectly connected to the laminated glass through the substrate 50 and the transition layer 60.

[0139] It should be noted that, in this embodiment, only the example of the nano anti-reflection layer 20 being connected to the fourth surface 132 of the laminated glass through the transition layer 60 and the substrate 50 is used for explanation, and the connection of the nano anti-reflection layer 20 to any other surface of the laminated glass through the transition layer 60 and the substrate 50 can be used as a reference.

[0140] In this embodiment, the structure and material of the substrate 50 can refer to the second embodiment, and the structure and material of the transition layer 60 can refer to the third embodiment.

[0141] The substrate 50 is laminated on the fourth surface 132 of the laminated glass, and the second surface 52 of the substrate 50 faces the laminated glass. The substrate 50 covers the information collection area S1. The transition layer 60 is laminated on the first surface 51 of the substrate 50, and the fourth surface 62 of the transition layer 60 faces the substrate 50. A plurality of nanocones 21 are directly disposed on the third surface 61 of the transition layer 60. It can be understood that the plurality of nanocones 21 are disposed on one side surface of the transition layer 60, the other side surface of the transition layer 60 is connected to one side surface of the substrate 50, and the other side surface of the substrate 50 is connected to the surface of the laminated glass.

[0142] It is understandable that, usually, the material of the multiple nanocones 21 is preferably selected from a material having the same refractive index as the substrate 50 on which they are located. Considering multiple angles such as the preparation process, production equipment, mechanical properties or chemical properties of the nano anti-reflection layer 20 and the anti-reflection effect that the nano anti-reflection layer 20 can achieve, the material of the multiple nanocones 21 can also be different from the material of the substrate 50 on which they are located. When the material of the multiple nanocones 21 is different from the substrate 50 on which they are located, by providing a transition layer 60 between the surface of the laminated glass and the nano anti-reflection layer 20, a transition effect can be played between the nano anti-reflection layer 20 and the surface of the laminated glass, thereby improving the anti-reflection effect of the nano anti-reflection layer 20. In addition, the optical design of the nano anti-reflection layer 20 and the transition layer 60 can be combined to further reduce the broadband reflectivity of the vehicle window glass 100.

[0143] The combination of the nano anti-reflection layer 20, the transition layer 60 and the substrate 50 can make the inner surface of the vehicle window glass 100 have a surface reflectivity of 0.65% in the 400nm to 2000nm band. When the incident angle increases to 65°, the surface reflectivity of the inner surface of the vehicle window glass 100 can be controlled below 1%.

[0144] Please refer to Fig.17 , Fig.18 and Fig.19 The present application provides a fifth embodiment of a vehicle window glass 100 . The difference between this embodiment and the first embodiment is that the vehicle window glass 100 includes an optical compensation block 70 .

[0145] With the evolution of intelligent driving, the information acquisition device 200 is increasingly used in automobiles, and the accuracy of the image acquisition is increasingly required. Usually, the modulation transfer function (MTF) is used to analyze the resolution capability of the information acquisition device 200 through the window glass 100. Since the information acquisition area S1 of the window glass 100 is in a curved state, the resolution capability of the information acquisition device 200 is reduced. By setting an optical compensation block 70 in the information acquisition area S1 of the window glass 100, the quality of the MTF can be optimized.

[0146] In this embodiment, the material of the optical compensation block 70 can be optical glass or optical plastic. The material of the optical compensation block 70 includes but is not limited to cycloolefin copolymer (COC, Cyclo-Olefin Copolymer), cycloolefin polymer (COP, Cyclo Olefin Polymer), polymethyl methacrylate (PMMA, Polymethyl Methacrylate), polycarbonate (PC, Polycarbonate), polyetherimide (PEI, Polyetherimide), polystyrene (PS, Polystyrene), styrene and acrylate copolymer (SAC, Styrene acrylate copolymer) and methylpentene copolymer (PMP, Poly (4-methylpentene-1)).

[0147] In this embodiment, the thickness of the optical compensation block 70 is uneven. The maximum thickness of the optical compensation block 70 is less than or equal to 6.0 mm. Preferably, the maximum thickness of the optical compensation block 70 is less than or equal to 4.0 mm, or the maximum thickness of the optical compensation block 70 is less than or equal to 2.0 mm, or the maximum thickness of the optical compensation block 70 is less than or equal to 1.0 mm.

[0148] In this embodiment, the optical compensation block 70 is connected to the surface of the window glass 100 facing the interior of the vehicle 1000. The optical compensation block 70 covers the information collection area S1 along the thickness direction of the window glass 100. The nano anti-reflection layer 20 is stacked on the side surface of the optical compensation block 70 facing the interior of the vehicle 1000.

[0149] In a first possible implementation, Fig.17 , the laminated glass is a complete structure. The inner surface of the vehicle window glass 100 is the surface of the vehicle window glass 100 facing the interior of the vehicle 1000. The optical compensation block 70 is connected to the inner surface of the vehicle window glass 100. The nano anti-reflection layer 20 is laminated on the side of the optical compensation block 70 facing away from the inner surface of the vehicle window glass 100.

[0150] In a second possible implementation, Fig.18 , the middle layer 12 is provided with a first through groove 122. Along the thickness direction of the laminated glass, the first through groove 122 penetrates the two surfaces of the middle layer 12 that are arranged opposite to each other. Along the thickness direction of the vehicle window glass 100, the orthographic projection of the first through groove 122 on the second surface 112 of the outer glass plate 11 completely covers the information collection area S1. At this time, the inner surface of the vehicle window glass 100 is the surface of the vehicle window glass 100 that faces the interior of the vehicle 1000.

[0151] The optical compensation block 70 is connected to the inner surface of the vehicle window glass 100. The nanometer anti-reflection layer 20 is laminated on the side of the optical compensation block 70 facing away from the inner surface of the vehicle window glass 100.

[0152] In a second possible implementation, Fig.19 , the laminated glass is provided with a first through groove 122 and a second through groove 133. The first through groove 122 is provided in the middle layer 12. Along the thickness direction of the laminated glass, the first through groove 122 penetrates the two surfaces of the middle layer 12 that are arranged opposite to each other. The second through groove 133 is provided in the inner glass plate 13. Along the thickness direction of the laminated glass, the second through groove 133 penetrates the third surface 131 and the fourth surface 132 of the inner glass plate 13. Along the thickness direction of the vehicle window glass 100, the orthographic projection of the first through groove 122 on the second surface 112 of the outer glass plate 11 completely covers the information collection area S1, and the orthographic projection of the second through groove 133 on the second surface 112 of the outer glass plate 11 completely covers the information collection area S1, and the second through groove 133 is connected with the first through groove 122. At this time, the part of the second surface 112 of the vehicle window glass 100 located in the first through groove 122 is the surface of the vehicle window glass 100 facing the interior of the vehicle 1000.

[0153] The optical compensation block 70 is located in the second through groove 133 and is connected to the second surface 112 of the outer glass plate 11. The nanometer anti-reflection layer 20 is stacked on the side of the optical compensation block 70 facing away from the outer glass plate 11.

[0154] In a fourth possible implementation, the cross section of the information collection area S1 of the vehicle window glass 100 along the vertical direction is wedge-shaped. The optical compensation block 70 is connected to the inner surface of the vehicle window glass 100. The nano anti-reflection layer 20 is stacked on the side of the optical compensation block 70 facing away from the inner surface of the vehicle window glass 100.

[0155] It should be noted that, in other embodiments, the nano anti-reflection layer 20 may also be indirectly connected to the optical compensation block 70 through the substrate 50 and / or the transition layer 60 .

[0156] It can be understood that, in this embodiment, the use of the nano anti-reflection layer 20 can reduce the secondary image, reduce the interference of the secondary image on the primary image, and improve the clarity of the image collected by the information collection device 200. By arranging the optical compensation block 70 on the surface of the window glass 100 facing the interior of the vehicle 1000, the resolution capability of the information collection device 200 can be improved, and the clarity of the image collected by the information collection device 200 can be further improved.

[0157] Please refer to Fig. 20 , Fig.21 and Fig. 22 The present application provides a sixth embodiment of a vehicle window glass 100 . The difference between this embodiment and any of the above embodiments is that the vehicle 1000 further includes a cover 80 .

[0158] In this embodiment, the cover 80 is an annular column. The cover 80 includes a first opening 81 and a second opening 82, which are opposite to and connected to each other. The cover 80 is covered on the laminated glass, the periphery of the first opening 81 is connected to the surface of the vehicle window glass 100 facing the inside of the vehicle 1000, and the periphery of the second opening 82 is connected to the housing 210 of the information collection device 200. The cover 80, the housing 210 and the vehicle window glass 100 form a housing cavity M. The lens assembly 220 and the nano anti-reflection layer 20 are both located in the housing cavity M.

[0159] In a first possible implementation, Fig. 20 , the laminated glass is a complete structure. The cover 80 is covered on the laminated glass. The periphery of the first opening 81 is connected to the inner surface of the vehicle window glass 100, and the periphery of the second opening 82 is connected to the housing 210 of the information collection device 200. The nano anti-reflection layer 20 is provided on the inner surface of the vehicle window glass 100. It can be understood that the lens assembly 220 and the nano anti-reflection layer 20 are both located in the accommodating cavity M.

[0160] In a second possible implementation, Fig.21 The middle layer 12 is provided with a first through groove 122. Along the thickness direction of the laminated glass, the first through groove 122 penetrates the two surfaces of the middle layer 12 that are arranged opposite to each other. Along the thickness direction of the window glass 100, the orthographic projection of the first through groove 122 on the second surface 112 of the outer glass plate 11 completely covers the information collection area S1.

[0161] The cover 80 is covered on the laminated glass, the periphery of the first opening 81 is connected to the inner surface of the vehicle window glass 100, and the periphery of the second opening 82 is connected to the housing 210 of the information collection device 200. The nano anti-reflection layer 20 is provided on the inner surface of the vehicle window glass 100. It can be understood that the lens assembly 220 and the nano anti-reflection layer 20 are both located in the accommodating cavity M.

[0162] In a third possible implementation, Fig. 22, the laminated glass is provided with a first through groove 122 and a second through groove 133. The first through groove 122 is provided in the middle layer 12. Along the thickness direction of the laminated glass, the first through groove 122 penetrates the two surfaces of the middle layer 12 that are arranged opposite to each other. The second through groove 133 is provided in the inner glass plate 13. Along the thickness direction of the laminated glass, the second through groove 133 penetrates the third surface 131 and the fourth surface 132 of the inner glass plate 13. Along the thickness direction of the vehicle window glass 100, the orthographic projection of the first through groove 122 on the second surface 112 of the outer glass plate 11 completely covers the information collection area S1, and the orthographic projection of the second through groove 133 on the second surface 112 of the outer glass plate 11 completely covers the information collection area S1, and the second through groove 133 is connected to the first through groove 122.

[0163] The cover 80 is covered on the laminated glass, the periphery of the first opening 81 is connected to the inner surface of the vehicle window glass 100, the periphery of the second opening 82 is connected to the housing 210 of the information collection device 200, and the cover 80, the housing 210 and the vehicle window glass 100 form a receiving cavity M. The lens assembly 220 and the nano anti-reflection layer 20 are both located in the receiving cavity M. The nano anti-reflection layer 20 is located in the first through groove 122, and the nano anti-reflection layer 20 is disposed on the second surface 112 of the outer glass plate 11. It can be understood that the lens assembly 220 and the nano anti-reflection layer 20 are both located in the receiving cavity M.

[0164] It should be noted that, in the present embodiment, the periphery of the first opening 81 of the cover shell 80 can also be connected to the portion of the second surface 112 of the outer glass plate 11 located in the first through groove 122. It is only necessary for the nano anti-reflection layer 20 to be located in the accommodating cavity M surrounded by the cover shell 80, the outer shell 210 of the information collection device 200 and the vehicle window glass 100.

[0165] In a fourth possible implementation, the cross section of the information collection area S1 of the vehicle window glass 100 along the vertical direction is wedge-shaped. The cover 80 is covered on the laminated glass, the periphery of the first opening 81 is connected to the inner surface of the vehicle window glass 100, and the periphery of the second opening 82 is connected to the housing 210 of the information collection device 200. The nano anti-reflection layer 20 is provided on the inner surface of the vehicle window glass 100. It can be understood that the lens assembly 220 and the nano anti-reflection layer 20 are both located in the accommodating cavity M.

[0166] It should be noted that, in other embodiments, the nano anti-reflection layer 20 may also be indirectly formed on the surface of the window glass 100 facing the interior of the vehicle 1000 through the substrate 50 and / or the transition layer 60 .

[0167] It can be understood that by providing a cover 80 between the laminated glass and the information collection device 200 and covering the nano anti-reflection layer 20, the stability and wear resistance of the nano anti-reflection layer 20 can be improved, and the nanocones 21 can be prevented from being easily damaged; in addition, it can also protect the nano anti-reflection layer 20 and prevent the nano anti-reflection layer 20 from being contaminated by dust, oil stains, etc., which will lead to a decrease in the imaging quality of the information collection device 200.

[0168] The present application provides a seventh embodiment of the vehicle window glass 100. The difference between this embodiment and any of the embodiments is that the information collection system 300 includes a visible light camera and a laser radar.

[0169] In this embodiment, both the visible light camera and the laser radar serve as the information collection device 200. Both the visible light camera and the laser radar are located inside the vehicle 1000, and both the visible light camera and the laser radar are facing the window glass 100. The visible light camera and the laser radar are arranged adjacent to each other. Both the visible light camera and the laser radar obtain image data outside the vehicle 1000 through the information collection area S1. The data information outside the vehicle 1000 obtained by the visible light camera and the laser radar can be calibrated and integrated with each other, which is conducive to improving the intelligent driving level of the vehicle 1000, and at the same time, it can also improve the impact of the harsh environment outside the vehicle 1000 on the accuracy of the visible light camera or the laser radar. Compared with arranging the laser radar on the sheet metal of the vehicle body 400 located on the top of the window glass 100, arranging the laser radar on the inner side of the window glass 100 can also improve the aesthetics of the shape of the vehicle 1000.

[0170] In this embodiment, since the information collection area S1 of the vehicle window glass 100 needs to simultaneously meet the transmittance requirements of the visible light camera for visible light (380nm~780nm) and the transmittance requirements of the laser radar for near-infrared light (900nm~1700nm), the information collection area S1 of the vehicle window glass 100 needs to have high transmittance in both the visible light band and the near-infrared band.

[0171] The information collection area S1 of the vehicle window glass 100 has a transmittance TL of 900nm to 1700nm for near infrared wavelengths incident at an incident angle of 65°. (900-1700) , TL (900-1700) ≥80%, or TL (900-1700) ≥85%, or TL (900-1700) ≥90%. Specifically, when the incident angle is 65°, the near-infrared reflectivity of the nano anti-reflection layer 20 is less than or equal to 4.7%. Preferably, the near-infrared reflectivity of the nano anti-reflection layer 20 is less than or equal to 3.0%, and more preferably, the near-infrared reflectivity of the nano anti-reflection layer 20 is less than or equal to 1.0%.

[0172] It can be understood that by making the nano anti-reflection layer 20 have low reflectivity in both the visible light band and the near-infrared band, both the visible light camera and the laser camera can obtain clear image data through the information collection area S1.

[0173] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A vehicle window glass, used for vehicles, It is characterized in that The vehicle window glass has an information collection area, the information collection area is provided with a nanometer anti-reflection layer, and the incident light passes through the information collection area and the nanometer anti-reflection layer to form a first refracted light and a second refracted light; The nano anti-reflection layer includes a plurality of nanocones, and the plurality of nanocones are arranged periodically; When the incident angle θ of the incident light is between 45° and 75°, the ratio of the transmittance of the first refracted light to the transmittance of the second refracted light is the primary-secondary image transmittance Cr12, and Cr12≥1000.

2. The vehicle window glass according to claim 1, It is characterized in that The periodic spacing P of the plurality of nanocones is ≤380 nm.

3. The vehicle window glass according to claim 2, It is characterized in that The ratio D / P of the diameter D of the plurality of nanocones to the periodic pitch P of the plurality of nanocones is in the range of 0.8≤D / P≤1.

2.

4. The vehicle window glass according to claim 3, It is characterized in that The range of the height H of the plurality of nanocones is: 200nm≤H≤500nm.

5. The vehicle window glass according to claim 4, It is characterized in that A ratio of a height H of the plurality of nanocones to a diameter D of the plurality of nanocones is H / D≤0.

5.

6. The vehicle window glass according to claim 1, It is characterized in that Cr12≥2000, or Cr12≥3000, or Cr12≥5000, or Cr12≥8000, or Cr12≥10000, or Cr12≥20000, or Cr12≥50000.

7. The vehicle window glass according to claim 1, It is characterized in that The vehicle window glass is a single-piece glass having an outer surface and an inner surface. The nano anti-reflection layer is disposed on the outer surface and / or the inner surface.

8. The vehicle window glass according to claim 1, It is characterized in that The vehicle window glass is a laminated glass, which comprises an outer glass plate, an intermediate layer and an inner glass plate, wherein the outer glass plate has a first surface and a second surface opposite to each other, the inner glass plate has a third surface and a fourth surface opposite to each other, and the intermediate layer connects the second surface and the third surface; At least one of the first surface, the second surface, the third surface and the fourth surface is provided with the nano anti-reflection layer.

9. The vehicle window glass according to claim 8, It is characterized in that The vehicle window glass further comprises a substrate, the substrate covers the information collection area, the nano anti-reflection layer is arranged on one side surface of the substrate, and the other side surface of the substrate is connected to the surface of the laminated glass.

10. The vehicle window glass according to claim 8 or 9, It is characterized in that The vehicle window glass further comprises a transition layer, the transition layer covers the information collection area, the nano anti-reflection layer is arranged on one side surface of the transition layer, and the other side surface of the transition layer is connected to the surface of the laminated glass.

11. The vehicle window glass according to claim 8, It is characterized in that The middle layer is provided with a first through groove, which penetrates the middle layer along the thickness direction. Along the thickness direction of the window glass, the orthographic projection of the first through groove on the second surface completely covers the information collection area.

12. The vehicle window glass according to claim 8 or 11, It is characterized in that The inner glass plate is provided with a second through groove, the second through groove runs through the third surface and the fourth surface, and along the thickness direction of the window glass, the orthographic projection of the second through groove on the second surface completely covers the information collection area; The first surface is provided with the nano anti-reflection layer; and / or the second surface is provided with the nano anti-reflection layer, and the nano anti-reflection layer is located in the second through groove.

13. The vehicle window glass according to claim 1, It is characterized in that The information collection area has a transmittance TL of visible light with a wavelength of 380nm to 780nm incident at an incident angle of 65°. (380-780) , TL (380-780) ≥60%, or TL (380-780) ≥65%, or TL (380-780) ≥70%, or TL (380-780) ≥75%, or TL (380-780) ≥80%, or TL (380-780) ≥85%.

14. The vehicle window glass according to claim 1, It is characterized in that The information collection area has a transmittance TL of near infrared light with a wavelength of 900nm to 1700nm incident at an incident angle of 65°. (900-1700) , TL (900-1700) ≥80%, or TL (900-1700) ≥85%, or TL (900-1700) ≥90%.

15. The vehicle window glass according to claim 1, It is characterized in that The vehicle window glass further comprises an optical compensation block, the optical compensation block is connected to the surface of the vehicle window glass facing the interior of the vehicle, and along the thickness direction of the vehicle window glass, the optical compensation block covers the information collection area; The nanometer anti-reflection layer is arranged on a surface of the optical compensation block facing the interior of the vehicle.

16. The vehicle window glass according to claim 1, It is characterized in that The central axes of the plurality of nanocones are parallel to the normal line of the vehicle window glass.

17. An information collection system, It is characterized in that It comprises an information collection device and a vehicle window glass as claimed in any one of claims 1 to 16, wherein the information collection device comprises a housing and a lens assembly, and the lens assembly is accommodated in the housing; The information collection device is located inside the vehicle, the housing is connected to the vehicle window glass, the lens assembly faces the vehicle window glass, and the first refracted light and the second refracted light enter the lens assembly.

18. The information collection system according to claim 17, It is characterized in that The angle between the main axis light within the field of view of the information collection device and the normal line of the window glass is α; The central axes of the multiple nanocones are all tilted relative to the normal of the vehicle window glass, and the multiple nanocones are all tilted toward the lens assembly. The angle between the central axes of the multiple nanocones and the normal of the vehicle window glass is β, and β and α satisfy the following relationship: β=α / 2, or β=α / 2±30°, or β=α / 2±20°, or β=α / 2±10°.

19. The information collection system according to claim 17 or 18, It is characterized in that The nano anti-reflection layer is formed on the surface of the window glass facing the interior of the vehicle; The information collection system further includes a cover shell, the cover shell includes a first opening and a second opening, the first opening and the second opening are opposite to each other and communicated with each other; The cover shell is disposed on the laminated glass, the periphery of the first opening is connected to the surface of the vehicle window glass facing the interior of the vehicle, the periphery of the second opening is connected to the outer shell, the cover shell, the outer shell and the vehicle window glass form a accommodating cavity, and the lens assembly and the nano anti-reflection layer are both located in the accommodating cavity.

20. A vehicle, It is characterized in that It comprises a vehicle body and the information collection system as described in any one of claims 17 to 19, wherein the information collection system is installed on the vehicle body.

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