Windshield and windshield assembly

Abstract

A windshield (100) and windshield assembly (1000), the windshield (100) comprising an outer glass sheet (10), a polymer interlayer (30) and an inner glass sheet (20), the inner glass sheet (20) having opposite third and fourth surfaces (21, 22), the third surface (21) facing the polymer interlayer (30), the windshield (100) having an information acquisition area (S1) and a non-information acquisition area (S2); a reflection enhancement layer (40) is provided on the fourth surface (22), the reflection enhancement layer (40) covering the information acquisition area (S1) and the non-information acquisition area (S2), the reflection enhancement layer (40) being configured to increase the reflectivity of the non-information acquisition area (S2) to P-polarized light in the wavelength range of 380nm-780nm; an outermost medium layer (50) is further provided on the information acquisition area (S1), the outermost medium layer (50) being provided on the side of the reflection enhancement layer (40) away from the fourth surface (22), the outermost medium layer (50) and the reflection enhancement layer (40) being configured to increase the transmittance of the information acquisition area to near-infrared light in the wavelength range of 780nm-980nm. The windshield has high transmittance to the signal of a laser radar, and can realize a heads-up display function.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glass products, in particular to a windshield and a windshield assembly. BACKGROUND

[0002] With the development of automatic driving technology and the increasing demand for additional functions of the front windshield of the car, the front windshield of the car is endowed with more and more functions, such as head-up display (HUD) function, electric heating defrosting and demisting function, infrared reflecting heat insulation function and ultraviolet shielding function, etc.

[0003] Laser radar is a radar system that emits laser beams to detect the position, speed and other characteristic quantities of the target. Due to its high detection accuracy and high accuracy, it plays an irreplaceable role in the field of automatic driving. The installation methods of laser radar on the car include external and internal. The external installation is usually to install the laser radar on the roof, hood, fender or front grille of the car. This installation method exposes the laser radar to the outside air, and weather, environmental quality such as rain, wind, dust, high temperature, low temperature, etc. will affect the accuracy of the laser radar; the internal installation is to install the laser radar inside the car cabin, which can avoid the influence of weather and environment.

[0004] For the laser radar installed internally, the 905nm wavelength or 1550nm wavelength signals emitted and received by the laser radar need to pass through the front windshield. However, the front windshield used at present to meet the heat insulation requirement has a high barrier rate to 780-2500nm infrared rays, which cannot meet the normal working and high-precision measurement requirements of the laser radar. SUMMARY

[0005] The purpose of the present application is to provide a windshield and a windshield assembly, which has high transmittance to the signals of the laser radar, meets the use requirements of the internally installed laser radar, and can realize the head-up display function.

[0006] The present application provides a windshield, which comprises an outer glass sheet, a polymer interlayer and an inner glass sheet, the polymer interlayer is arranged between the outer glass sheet and the inner glass sheet, the outer glass sheet has opposite first and second surfaces, the second surface faces the polymer interlayer, the inner glass sheet has opposite third and fourth surfaces, the third surface faces the polymer interlayer, and the windshield has an information acquisition area and a non-information acquisition area.

[0007] A reflection enhancement layer is arranged on the fourth surface, the reflection enhancement layer covers the information acquisition area and the non-information acquisition area, and the reflection enhancement layer is used to improve the reflectivity of the non-information acquisition area to P-polarized light of 380nm-780nm.

[0008] The outermost medium layer is arranged on a side surface of the reflection-increasing layer away from the fourth surface, and the outermost medium layer and the reflection-increasing layer are used to improve the transmittance of the information collection area to near-infrared rays of 780 nm to 980 nm.

[0009] The thickness of the reflection-increasing layer is 100 nm to 500 nm, the reflection-increasing layer comprises at least one stacked structure, and the stacked structure comprises a high-refractive-index layer and a low-refractive-index layer deposited in sequence from the fourth surface to a direction away from the outer glass plate, the high-refractive-index layer has a refractive index of 1.7 to 2.7, and the low-refractive-index layer has a refractive index of 1.3 to 1.6.

[0010] The high-refractive-index layer comprises a plurality of high-refractive-index sublayers, or the reflection-increasing layer comprises at least two stacked structures, the plurality of high-refractive-index layers comprise at least one first high-refractive-index layer and at least one second high-refractive-index layer, the first high-refractive-index layer is a single high-refractive-index sublayer, and the second high-refractive-index layer comprises a plurality of high-refractive-index sublayers.

[0011] The low-refractive-index layer comprises a plurality of low-refractive-index sublayers, or the reflection-increasing layer comprises at least two stacked structures, the plurality of low-refractive-index layers comprise at least one first low-refractive-index layer and at least one second low-refractive-index layer, the first low-refractive-index layer is a single low-refractive-index sublayer, and the second low-refractive-index layer comprises a plurality of low-refractive-index sublayers.

[0012] The at least one second high-refractive-index layer comprises a first high-refractive-index sublayer and a second high-refractive-index sublayer arranged in sequence, the first high-refractive-index sublayer is closer to the fourth surface than the second high-refractive-index sublayer, the first high-refractive-index sublayer has a refractive index of 1.7 to 2.04, and the second high-refractive-index sublayer has a refractive index of 2.05 to 2.7.

[0013] The material of the first high-refractive-index sublayer is SiO x N y , 1

[0014] The thickness of the outermost medium layer is 10 nm to 140 nm, and the outermost medium layer comprises at least one medium sublayer, and the medium sublayer has a refractive index of 1.4 to 2.7.

[0015] The refractive index of any medium sublayer is 2.0 to 2.7, and the material of the medium sublayer is selected from ZnSnO x , ZnAlO x , TiO x , NbO x , SiN x , ZrO x、ZrSiN x At least one of .

[0016] The refractive index of any dielectric sublayer is 2.2-2.7, and the thickness of the outermost dielectric layer is 10 nm-70 nm.

[0017] Among them, the transmittance of the information collection area to near-infrared light of 780nm~980nm incident at an incident angle of 65° is greater than or equal to 80%, and the reflectivity of the non-information collection area to P-polarized light of 380nm~780nm incident at an incident angle of 65° is greater than or equal to 20%.

[0018] Among them, the reflectivity of the non-information collection area to P-polarized light with a wavelength of 629 nm incident at an incident angle of 65° is Y1, the reflectivity of the non-information collection area to P-polarized light with a wavelength of 529 nm incident at an incident angle of 65° is Y2, and the reflectivity of the non-information collection area to P-polarized light with a wavelength of 469 nm incident at an incident angle of 65° is Y3;

[0019] | Y1- Y2|≤2.5%, | Y2- Y3|≤2.5%, | Y1- Y3|≤2.5%.

[0020] Among them, Y1≥20%, Y2≥20%, and Y3≥20%.

[0021] The windshield further includes a hydrophobic layer, which is stacked on a surface of the outermost dielectric layer on a side away from the reflection-enhancing layer.

[0022] The water contact angle of the hydrophobic layer is greater than 110°.

[0023] Among them, the surface energy of the hydrophobic layer is ≤0.3Jm -2 , the refractive index of the hydrophobic layer is ≤1.6.

[0024] Wherein, the outermost dielectric layer is only one dielectric sublayer, the refractive index of the dielectric sublayer is 2.2 to 2.7, and the thickness is 10 nm to 70 nm; or

[0025] The outermost dielectric layer includes a first dielectric sublayer and a second dielectric sublayer, the total thickness of the first dielectric sublayer and the second dielectric sublayer is 10nm to 140nm, the first dielectric sublayer is in direct contact with the second side surface of the reflection-enhancing layer, and the refractive index of the first dielectric sublayer is 2.0 to 2.7. The second dielectric sublayer is arranged on the second side surface away from the reflection-enhancing layer, and the refractive index of the second dielectric sublayer is 2.2 to 2.7.

[0026] The outermost dielectric layer and the reflection-enhancing layer together form an anti-reflection structure for near-infrared rays of 780nm to 980nm, so that the transmittance of the information collection area for near-infrared rays of 780nm to 980nm incident at an incident angle of 65° is greater than or equal to 80%.

[0027] The present application also provides a windshield assembly, including a laser radar, a head-up display projection device and the above-mentioned windshield, the laser radar is used to emit and receive near-infrared rays of 780nm~980nm, and the near-infrared rays pass through the information collection area, and the head-up display projection device is used to generate P-polarized light of 380nm~780nm, and the P-polarized light is incident on the non-information collection area.

[0028] The P-polarized light generated by the head-up display projection device includes at least 90% of the P-polarized component.

[0029] Among them, the near-infrared light emitted by the lidar includes at least 50% P-polarization component.

[0030] Among them, the P-polarized light generated by the head-up display projection device includes 100% P-polarized components, and the near-infrared light emitted by the laser radar includes 100% P-polarized components.

[0031] The present application provides a windshield and a windshield assembly. By providing a reflection-enhancing layer and locally adding an outermost dielectric layer, the windshield can increase the reflectivity of P-polarized light from 380nm to 780nm and the transmittance of near-infrared light from 780nm to 980nm. Therefore, the windshield can be used in conjunction with a laser radar and a head-up display projection device, thereby achieving high-precision measurement of the laser radar and more uniform color of the red, green, and blue HUD display images, ensuring that the laser radar can operate normally within a maximum horizontal FOV (field of view) of 120°, improving the detection range and detection accuracy of the laser radar, and achieving stability and accuracy in the operation of the built-in laser radar. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic cross-sectional view of a windshield provided in the first embodiment of the present application;

[0033] Figure 2 for Figure 1 A top view of the windshield shown;

[0034] Figure 3 for Figure 1 Schematic diagrams of the structures of three examples of reflection-enhancing layers in windshields shown;

[0035] Figure 4 for Figure 1 A schematic diagram of the structure of the outermost dielectric layer in the windshield shown;

[0036] Figure 5 FIG. 1 shows a schematic view of a cross-sectional structure of a windshield 100 according to an embodiment of the present application.

[0037] Figure 6 FIG. 2 shows a schematic view of a structure of a windshield assembly according to an embodiment of the present application. DETAILED DESCRIPTION

[0038] The content of the present application is further described below in conjunction with the accompanying drawings.

[0039] Referring to Figure 1 and Figure 2 , Figure 1 FIG. 1 shows a schematic view of a cross-sectional structure of a windshield 100 according to an embodiment of the present application. Figure 2 FIG. 2 shows a schematic view of a structure of a windshield assembly according to an embodiment of the present application. Figure 1 FIG. 3 shows a top view of the windshield 100 shown in FIG. 1. The windshield 100 includes a laminated glass, a reflection-increasing layer 40, and an outermost dielectric layer 50, which are sequentially stacked. The laminated glass includes an outer glass sheet 10, a polymer interlayer 30, and an inner glass sheet 20, which are sequentially stacked. The polymer interlayer 30 is sandwiched between the outer glass sheet 10 and the inner glass sheet 20, and the inner glass sheet 20 faces the interior of a vehicle when the windshield 100 is installed on the vehicle. The reflection-increasing layer 40 is stacked on the inner glass sheet 20, and the outermost dielectric layer 50 is stacked on the reflection-increasing layer 40.

[0040] The windshield 100 includes an information collection area S1 and a non-information collection area S2, which do not overlap, wherein the information collection area S1 is used as a signal transmission window area for an information collection system (not shown in the figure) to collect information. When the windshield 100 is installed on a vehicle, the information collection system is arranged in the interior of the vehicle, and signals transmitted and / or received by the information collection system can all pass through the information collection area S1 of the windshield 100. The information collection system in the present application includes but is not limited to a laser radar, an optical sensor, an infrared camera, a visible light camera, etc., and the present embodiment takes the information collection system as a laser radar for example. At least part of the non-information collection area S2 is used for head-up display (HUD), i.e., as a HUD display area to display information such as driving speed, dynamic navigation, road safety warning, commercial district information, etc. The ratio of the area of the information collection area S1 to the area of the windshield 100 is at most 20%, and the ratio of the area of the non-information collection area S2 to the area of the windshield 100 is at least 50%.

[0041] The outer glass sheet 10 has opposite first and second surfaces 11, 12, the second surface 12 facing the polymer interlayer 30, and the inner glass sheet 20 has opposite third and fourth surfaces 21, 22, the third surface 21 facing the polymer interlayer 30. When the windshield 100 is installed on a vehicle, the fourth surface 22 in the inner glass sheet 20 is installed facing an information acquisition system installed inside the vehicle.

[0042] The reflection-increasing layer 40 is laminated on the fourth surface 22 of the inner glass sheet 20, and covers the information acquisition region S1 and the non-information acquisition region S2. Specifically, the reflection-increasing layer 40 has opposite first and second side surfaces 41, 42, the first side surface 41 adhering to the fourth surface 22 of the inner glass sheet 20, and the second side surface 42 being away from the fourth surface 22. In the present application, the reflection-increasing layer 40 is used to increase the reflectivity of the non-information acquisition region S2 to P-polarized light of 380 nm to 780 nm; by providing the reflection-increasing layer 40 on the fourth surface 22, the reflectivity of the non-information acquisition region S2 to P-polarized light of 380 nm to 780 nm is increased, so that the reflectivity of the non-information acquisition region to P-polarized light of 380 nm to 780 nm incident at an incident angle of 65° is greater than or equal to 20%, thereby realizing a clear and ghost-free head-up display function.

[0043] In an embodiment, the reflectivity of the non-information acquisition region S2 to P-polarized light of 629 nm (red P-polarized light) incident at an incident angle of 65° is Y1, the reflectivity of the non-information acquisition region S2 to P-polarized light of 529 nm (green P-polarized light) incident at an incident angle of 65° is Y2, and the reflectivity of the non-information acquisition region S2 to P-polarized light of 469 nm (blue P-polarized light) incident at an incident angle of 65° is Y3, | Y1- Y2|≤2.5%, | Y2- Y3|≤2.5%, | Y1- Y3|≤2.5%, that is, the difference between the reflectivities of red, green and blue P-polarized light on the non-information acquisition region S2 is less than or equal to 2.5%, which can make the red, green and blue HUD display image color more uniform. In some embodiments, Y1≥20%, Y2≥20%, and Y3≥20%.

[0044] The outermost dielectric layer 50 is arranged on the second side surface 42 of the reflection-increasing layer 40 away from the fourth surface 22 and covers at least the information acquisition area S1. After the outermost dielectric layer 50 is stacked on the reflection-increasing layer 40, the outermost dielectric layer 50 and the reflection-increasing layer 40 together form an anti-reflection structure having an anti-reflection effect on near-infrared rays of 780 nm to 980 nm, thereby improving the transmittance of the information acquisition area S1 to the near-infrared rays of 780 nm to 980 nm. The transmittance of the information acquisition area S1 to the near-infrared rays of 780 nm to 980 nm incident at an incident angle of 65° is greater than or equal to 80%, thereby meeting the requirements of normal operation and high-precision measurement of the laser radar.

[0045] The outermost dielectric layer 50 includes at least one dielectric sub-layer, and the refractive index of the dielectric sub-layer is 1.4 to 2.7. The outermost dielectric layer 50 can be only one dielectric sub-layer or multiple dielectric sub-layers, and the material of the dielectric sub-layer is selected from at least one of SiO2, SiO x N y , ZnSnO x , ZnAlO x , TiO x , NbO x , SiN x , ZrO x , ZrSiN x . Preferably, the thickness of the outermost dielectric layer 50 is 10 nm to 140 nm, i.e., the total thickness of the dielectric sub-layers is 10 nm to 140 nm. The outermost dielectric layer 50 can improve the transmittance of the information acquisition area S1 to the near-infrared rays of 780 nm to 980 nm incident at an incident angle of 0° to 60°, 0° to 65°, or even 0° to 74°, so that the laser radar can normally work within a horizontal FOV of 120° at most.

[0046] In the present application, the reflection-increasing layer 40 comprises at least one stack structure, and the stack structure comprises high-refractive layers and low-refractive layers deposited in sequence from the fourth surface to the direction away from the outer glass sheet, the high-refractive layers have a refractive index of 1.7-2.7, and the low-refractive layers have a refractive index of 1.3-1.6. The reflection-increasing layer 40 can increase the reflectivity of P-polarized light of 380-780 nm by arranging the stack structure. Specifically, the reflection-increasing layer 40 can comprise one stack structure, i.e., the fourth surface 22 / high-refractive layer / low-refractive layer; or two stack structures, i.e., the fourth surface 22 / high-refractive layer / low-refractive layer / high-refractive layer / low-refractive layer; or three stack structures, i.e., the fourth surface 22 / high-refractive layer / low-refractive layer / high-refractive layer / low-refractive layer / high-refractive layer / low-refractive layer; or four stack structures, i.e., the fourth surface 22 / high-refractive layer / low-refractive layer / high-refractive layer / low-refractive layer / high-refractive layer / low-refractive layer / high-refractive layer / low-refractive layer; or five stack structures, i.e., the fourth surface 22 / high-refractive layer / low-refractive layer / high-refractive layer / low-refractive layer / high-refractive layer / low-refractive layer / high-refractive layer / low-refractive layer / high-refractive layer / low-refractive layer; or even more stack structures.

[0047] In the present application, the at least one high-refractive layer comprises at least two high-refractive sub-layers, and / or the at least one low-refractive layer comprises at least two low-refractive sub-layers. In the present application, “A and / or B” includes A, B, A and B.

[0048] Specifically, in one embodiment, the high-refractive layer comprises a plurality of high-refractive sub-layers, wherein “a plurality of” refers to two or more. That is, when the reflection-increasing layer 40 comprises one stack structure, the high-refractive layer in the one stack structure comprises a plurality of high-refractive sub-layers. When the reflection-increasing layer 40 comprises two or more stack structures, the high-refractive layer in each stack structure comprises a plurality of high-refractive sub-layers.

[0049] In another embodiment, when the reflection-increasing layer 40 comprises at least two stack structures, i.e., the reflection-increasing layer 40 comprises two or more stack structures, the reflection-increasing layer 40 comprises a plurality of high-refractive layers, and the plurality of high-refractive layers comprise a first high-refractive layer and a second high-refractive layer, the first high-refractive layer is at least one, and the second high-refractive layer is at least one. The first high-refractive layer is a single high-refractive sub-layer, and the second high-refractive layer comprises a plurality of high-refractive sub-layers.

[0050] Specifically, in one embodiment, the low-refractive layer includes a plurality of low-refractive sub-layers. That is, when the reflection-increasing layer 40 includes one stack structure, the low-refractive layer in the one stack structure includes a plurality of low-refractive sub-layers. When the reflection-increasing layer 40 includes two or more stack structures, the low-refractive layer in each stack structure includes a plurality of low-refractive sub-layers.

[0051] In another embodiment, the reflection-increasing layer 40 includes at least two stack structures, that is, when the reflection-increasing layer 40 includes two or more stack structures, the reflection-increasing layer 40 includes a plurality of low-refractive layers, the plurality of low-refractive layers include a first low-refractive layer and a second low-refractive layer, the first low-refractive layer is at least one, and the second low-refractive layer is at least one. The first low-refractive layer is a single low-refractive sub-layer, and the second low-refractive layer includes a plurality of low-refractive sub-layers.

[0052] Preferably, the thickness of the reflection-increasing layer 40 is 100 nm-500 nm,

[0053] Referring to Figure 3 , Figure 3 , Figure 1 Fig. 1 shows a specific structural schematic diagram of three examples of the reflection-increasing layer 40 in the windshield 100. Among them, Figure 3 Fig. 1(a) shows that the reflection-increasing layer 40 includes one stack structure, that is, a high-refractive layer A / low-refractive layer B, wherein the high-refractive layer A includes two high-refractive sub-layers, that is, the high-refractive layer A includes a first high-refractive sub-layer A1 and a second high-refractive sub-layer A2 which are sequentially stacked, the first high-refractive sub-layer A1 is closer to the fourth surface 22 than the second high-refractive sub-layer A2, in this embodiment, the first high-refractive sub-layer A1 is attached to the fourth surface 22, and the second high-refractive sub-layer A2 is stacked on the first high-refractive sub-layer A1. The refractive index of the first high-refractive sub-layer A1 is 1.7-2.04, and the refractive index of the second high-refractive sub-layer A2 is 2.05-2.7. Preferably, the material of the first high-refractive sub-layer A1 is SiO x N y , 1 Figure 3 Fig. 1(b) shows that the reflection-increasing layer 40 includes one stack structure, that is, a high-refractive layer A / low-refractive layer B. Among them, Figure 3 Fig. 1(c) shows that the reflection-increasing layer 40 includes two stack structures, that is, a high-refractive layer A / low-refractive layer B / high-refractive layer A / low-refractive layer B.

[0054] In this application, the material of the high-refractive layer can be selected from SiN x , SiAlN x , SiBNx 、SiTiN x 、SiZrN x 、TiO x 、NbO x 、ZrO x 、SiN x O y 、SiBN x O y 、SiTiN x O y 、SiAlN x O y 、SiZrN x O y 、ZnO x 、ZnAlO x 、ZnO x 、ZnSnO x Any one of the following, the material of the low refractive index layer can be SiO x 、 SiBO x 、SiTiO x 、SiAlO x 、SiZrO x In any one of the above embodiments, the thickness of the low refractive index layer is in the range of 35 nm to 60 nm.

[0055] See Figure 4 , Figure 4 for Figure 1 The structure diagram of the outermost dielectric layer 50 in the windshield 100 is shown. Figure 4 (a) is a schematic diagram of the structure in which the outermost dielectric layer 50 has only one dielectric sublayer, and (b) is a schematic diagram of the structure in which the outermost dielectric layer 50 has two dielectric sublayers. Figure 4 As shown in (a), the outermost dielectric layer 50 is only a dielectric sublayer 511, and the refractive index of the dielectric sublayer 511 is 2.2-2.7 and the thickness is 10nm-70nm. Figure 4In the embodiment shown in (b), the outermost dielectric layer 50 includes two dielectric sub-layers, i.e., a first dielectric sub-layer 521 and a second dielectric sub-layer 522, and the total thickness of the first dielectric sub-layer 521 and the second dielectric sub-layer 522 is 10 nm to 140 nm. The first dielectric sub-layer 521 is in direct contact with the second side surface 42 of the reflection-increasing layer 40, and the refractive index of the first dielectric sub-layer 521 is 2.0 to 2.7. The second dielectric sub-layer 522 is arranged away from the second side surface 42 of the reflection-increasing layer 40, and the refractive index of the second dielectric sub-layer 522 is 2.2 to 2.7. However, the present application is not limited to this. For example, the outermost dielectric layer 50 can include only one dielectric sub-layer, and the refractive index of the dielectric sub-layer is 1.4 to 1.6 or 1.7 to 2.0. For another example, the outermost dielectric layer 50 can include two dielectric sub-layers, and the refractive index of one of the dielectric sub-layers is 1.4 to 1.9, and the refractive index of the other dielectric sub-layer is 2.0 to 2.7. It can be understood that, in other embodiments, the outermost dielectric layer 50 can have more dielectric sub-layers, such as three, five, eight, etc.

[0056] Figure 5 A cross-sectional structure schematic diagram of a windshield 100 provided in the second embodiment of the present application is shown. The windshield 100 in the present embodiment is different from the windshield 100 in the first embodiment in that the windshield 100 further includes a hydrophobic layer 60, and the hydrophobic layer 60 is arranged on the side surface of the outermost dielectric layer 50 away from the reflection-increasing layer 40. Figure 1 The windshield 100 in the first embodiment includes, in sequence, the outer glass plate 10, the polymer interlayer 30, the inner glass plate 20, the reflection-increasing layer 40, the outermost dielectric layer 50, and the hydrophobic layer 60. The hydrophobic layer 60 has a water contact angle greater than 110° and a thickness less than 50 nm, and has the functions of hydrophobicity, anti-fouling, etc., and even has the effect of anti-fingerprint. Figure 5

[0057] In some embodiments, the hydrophobic layer 60 is an organic polymer film layer configured by a sol-gel method, and the material of the hydrophobic layer 60 can be an anti-fingerprint (AF) material. The AF material can be selected from at least one of heptadecafluorodecyltrimethoxysilane, tridecafluorooctyltriethoxysilane, tridecafluoroalkylpropyltrimethoxysilane, dodecafluoroalkyltrimethoxysilane, trifluoropropyltrimethoxysilane, methyltrichlorosilane, methyl dodecyl dichlorosilane, dimethyldichlorosilane, methylphenyldichlorosilane, methylvinyl dichlorosilane, or 3-trifluoropropyltrichlorosilane.

[0058] In some embodiments, the material of the hydrophobic layer 60 is an AF material with low surface energy, such as an AF material with a surface energy ≤0.3 Jm-2. The use of the material with low surface energy has more excellent anti-fingerprint effect. -2 , and the refractive index of the material is ≤1.6. The use of the material with low surface energy has more excellent anti-fingerprint effect. ​

[0059] In some embodiments of the present application, at least one of the outer glass sheet 10 and the inner glass sheet 20 is super transparent glass (super white glass), preferably both the outer glass sheet 10 and the inner glass sheet 20 are super transparent glass, the total iron content of the super transparent glass is less than or equal to 0.015%wt, and the visible light transmittance of the super transparent glass is greater than or equal to 91%; the use of super transparent glass is conducive to improving the transmittance of the windshield 100 to the 780nm-980nm near-infrared light emitted and received by the laser radar, thereby improving the detection accuracy of the laser radar. The polymer interlayer 30 can be selected from at least one of polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), and ion-type interlayer film (SGP).

[0060] Referring to Figure 6 The embodiments of the present application also provide a windshield assembly 1000, which comprises the windshield 100, the laser radar 200, and the head-up display projection device 300, and the laser radar 200 and the head-up display projection device 300 are both installed inside the vehicle. The laser radar 200 is used to emit and receive 780nm-980nm near-infrared light, and the near-infrared light passes through the information collection area S1. In the present embodiment, the near-infrared light emitted by the laser radar 200 penetrates the outermost medium layer 50, the reflection-increasing layer 40, the inner glass sheet 20, the polymer interlayer 30, and the outer glass sheet 10 in turn to reach the outside of the vehicle, and the received near-infrared light penetrates the outer glass sheet 10, the polymer interlayer 30, the inner glass sheet 20, the reflection-increasing layer 40, and the outermost medium layer 50 in turn, and is finally received by the laser radar 200 located inside the vehicle. The head-up display projection device 300 is used to generate 380nm-780nm P-polarized light, and the P-polarized light is incident on the non-information collection area S2. In the present embodiment, the P-polarized light is incident on the reflection-increasing layer 40 located in the non-information collection area S2.

[0061] In the present embodiment, the outermost medium layer 50 and the reflection-increasing layer 40 of the information collection area S1 together form a reflection-reducing structure, thereby improving the transmittance of the information collection area S1 to the 780nm-980nm near-infrared light, and the near-infrared light includes P-polarized components and S-polarized components. In order to further improve the detection accuracy of the laser radar, it is preferred that the near-infrared light includes at least 50% P-polarized components, for example, 50%, 55%, 60%, 70%, 80%, 90%, 95%, 100%, etc. More preferably, the near-infrared light includes 100% P-polarized components, i.e., the near-infrared light emitted by the laser radar is pure P-polarized light, which can be understood as being completely or almost completely P-polarized light.

[0062] The reflection-enhancing layer 40 of the non-information collection area S2 can reflect P-polarized light with a wavelength of 380 nm to 780 nm. To improve the clarity and contrast of the heads-up display image, the P-polarized light generated by the heads-up display projection device preferably includes at least 90% P-polarized components, for example, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%, and the like. More preferably, the P-polarized light generated by the heads-up display projection device includes 100% P-polarized components, i.e., the P-polarized light generated by the heads-up display projection device is pure P-polarized light, which can be understood as being completely or almost completely P-polarized light.

[0063] Embodiment: The following windshield 100 is described with specific examples of the reflection-enhancing layer 40 and the outermost medium layer 50.

[0064] Rf (λ)-θ represents the reflectivity of the non-information collection area of the windshield to P-polarized light with a wavelength of λ incident at an incident angle of θ from the fourth surface side; the present application is exemplified by Rf(469nm)-65°, Rf(529nm)-65°, Rf(629nm)-65°, i.e., the reflectivity of the non-information collection area to P-polarized light with a wavelength of 469 nm, 529 nm, or 629 nm incident at an incident angle of 65° from the fourth surface side.

[0065] L, a, and b represent the reflected color measured from the first surface 11 of the windshield 100 according to the CIE Lab color model, L being the brightness value, a being the red-green color hue value, and b being the yellow-blue color hue value.

[0066] TL represents the visible light transmittance measured and calculated according to the standard ISO 9050, the wavelength range of the visible light being 380 nm to 780 nm.

[0067] T(λ)-θ represents the transmittance of the information collection area of the windshield to near-infrared light with a wavelength of λ incident at an incident angle of θ; the present application is exemplified by T(905)-θ°, T(905)-15°, T(905)-30°, T(905)-45°, T(905)-60°, T(905)-65°, i.e., the transmittance of the information collection area to near-infrared light with a wavelength of 905 nm incident at an incident angle of 0°, 15°, 30°, 45°, 60°, or 65°, respectively.

[0068] Embodiment 1

[0069] The windshield 100 in Example 1 comprises a laminated glass, a reflection-increasing layer 40, an outermost dielectric layer 50 and a hydrophobic layer 60 which are sequentially stacked. The laminated glass comprises an outer glass sheet 10, a polymer interlayer 30 and an inner glass sheet 20 which are sequentially stacked. Among them, the outer glass sheet 10 and the inner glass sheet 20 are both super white glass, and the thickness of each is 2.1 mm. The polymer interlayer 30 is polyvinyl butyral (PVB), and the thickness is 0.76 mm.

[0070] The reflection-increasing layer 40 is deposited by a magnetron sputtering coating line. On the fourth surface 22, a first high refractive index sub-layer SiO2 (refractive index n = 1.71, extinction coefficient k = 0.00185, thickness 50.2 nm), a second high refractive index sub-layer TiO2 (thickness 52.7 nm), a low refractive index layer SiO2 (thickness 117 nm) are sequentially deposited in the direction away from the fourth surface 22 of the inner glass sheet 20. x N y x

[0071] The outermost dielectric layer 50 is deposited by a magnetron sputtering coating line and a mask plate. On the low refractive index layer SiO2 in the information acquisition area S1, a dielectric sub-layer Nb2O5 (thickness 36.6 nm) is directly deposited.

[0072] The hydrophobic layer 60: After the laminated glass with the reflection-increasing layer 40 and the outermost dielectric layer 50 is prepared, a hydrophobic layer 60 is sprayed on the fourth surface 22, and the hydrophobic layer 60 is dried. The material of the hydrophobic layer 60 is heptadecafluorodecyltrimethoxysilane, and the thickness is 15 nm. The hydrophobic layer 60 covers the outermost dielectric layer 50 in the information acquisition area S1 and covers the reflection-increasing layer 40 in the non-information acquisition area S2.

[0073] Comparative Example 1

[0074] Comparative Example 1 provides a windshield, which is different from the windshield 100 in Example 1 in that the windshield in Comparative Example 1 does not have an outermost dielectric layer 50 and a hydrophobic layer 60.

[0075] The optical indicators of the windshields in Example 1 and Comparative Example 1 are measured: the P-polarized light reflectivity, the visible light reflection color and the visible light transmittance of the non-information acquisition area S2 of the windshield are measured respectively, and the transmittance of 905 nm near-infrared light at different incident angles of the information acquisition area S1 of the windshield is measured, and the results are listed in Table 1.

[0076] Table 1: Optical indicators of the windshields in Example 1 and Comparative Example 1

[0077] ​​

[0078] As can be seen from Table 1, the reflectivity of the non-information collection area S2 in Example 1 and Comparative Example 1 to P-polarized light is greater than 20%, which has a good head-up display function; in particular, the reflectivity of the non-information collection area S2 to P-polarized light of red (629 nm), green (529 nm) and blue (469 nm) is also greater than 20%, and the reflectivity difference between them is less than or equal to 2.5%, so that the red, green and blue three-color HUD images in the head-up display (HUD) area are more uniform, and the reflectivity of the non-information collection area S2 to P-polarized light of green (529 nm) is also greater than that of P-polarized light of red (629 nm) or blue (469 nm); the reflection color Lab value and the visible light transmittance TL of the non-information collection area S2 also show that the windshield can meet the safety requirements of automobile use and present a good light blue color when the windshield is observed from the outside.

[0079] In addition, compared with Comparative Example 1, the windshield of Example 1 additionally has the outermost medium layer 50 in the information collection area S1, so that the information collection area S1 has a high transmittance of greater than 80% to 905 nm near-infrared light incident at an incident angle of 0°~65°, while the transmittance of the information collection area S1 of Comparative Example 1 to 905 nm near-infrared light incident at an incident angle of 0°~65° is less than 80%, and as the incident angle increases, the transmittance of the information collection area S1 of Comparative Example 1 to incident 905 nm near-infrared light is greatly reduced, even less than 70%. The outermost medium layer 50 and the reflection-increasing layer 40 of Example 1 jointly form an anti-reflection structure, so that the transmittance of the information collection area S1 of Example 1 to 905 nm near-infrared light incident at an incident angle of 0°~65° is increased by 8.1%~17.5%, which meets the requirements that the laser radar can normally work within a maximum 120° horizontal FOV (field of view), improves the detection range and detection accuracy of the laser radar, and realizes the stability and accuracy of the built-in laser radar.

[0080] In addition, compared with Comparative Example 1, the windshield of Example 1 additionally has the outermost medium layer 50 in the information collection area S1, so that the information collection area S1 has a high transmittance of greater than 80% to 905 nm near-infrared light incident at an incident angle of 0°~65°, while the transmittance of the information collection area S1 of Comparative Example 1 to 905 nm near-infrared light incident at an incident angle of 0°~65° is less than 80%, and as the incident angle increases, the transmittance of the information collection area S1 of Comparative Example 1 to incident 905 nm near-infrared light is greatly reduced, even less than 70%. The outermost medium layer 50 and the reflection-increasing layer 40 of Example 1 jointly form an anti-reflection structure, so that the transmittance of the information collection area S1 of Example 1 to 905 nm near-infrared light incident at an incident angle of 0°~65° is increased by 8.1%~17.5%, which meets the requirements that the laser radar can normally work within a maximum 120° horizontal FOV (field of view), improves the detection range and detection accuracy of the laser radar, and realizes the stability and accuracy of the built-in laser radar.

[0081] Example 2

[0082] The windshield 100 in Example 2 includes a laminated glass, a reflection-increasing layer 40, an outermost medium layer 50 and a hydrophobic layer 60 which are sequentially stacked. The laminated glass includes an outer glass plate 10, a polymer interlayer 30 and an inner glass plate 20 which are sequentially stacked. The outer glass plate 10 and the inner glass plate 20 are both super white glass, and the thickness of each is 2.1 mm. The polymer interlayer 30 is polyvinyl butyral (PVB), and the thickness is 0.76 mm.

[0083] Reflective layer 40: deposited by magnetron sputtering coating line, on the fourth surface 22, in the direction away from the fourth surface 22, in turn, deposited high refractive index layer SiO x N y (high refractive index n = 1.71, extinction coefficient k = 0.00185, thickness 27.6 nm), low refractive index layer SiO2(thickness 56.5 nm), high refractive index layer TiO x (thickness 57.3 nm), low refractive index layer SiO2(thickness 120.5 nm).

[0084] The outermost dielectric layer 50: by magnetron sputtering coating line and mask plate for local film deposition, in the information collection area S1 within the low refractive index layer SiO2directly deposited a layer of dielectric sub-layer TiO x (thickness 25.5 nm).

[0085] Hydrophobic layer 60: after the production of the laminated glass with reflective layer 40 and the outermost dielectric layer 50, a layer of hydrophobic layer 60 is sprayed on the fourth surface 22, and the hydrophobic layer 60 is dried. The material of the hydrophobic layer 60 is heptadecafluorodecyl trimethoxysilane, and the thickness is 15 nm. The hydrophobic layer 60 covers the outermost dielectric layer 50 of the information collection area S1 and covers the reflective layer 40 of the non-information collection area S2.

[0086] Comparative Example 2

[0087] Comparative Example 2 provides a windshield, which is different from the windshield 100 in Example 2 in that the outermost dielectric layer 50 and the hydrophobic layer 60 are not provided in the windshield of Comparative Example 2.

[0088] Measurement of optical indicators of windshields of Example 2 and Comparative Example 2: the P-polarized light reflectivity, visible light reflection color and visible light transmittance of the non-information collection area S2 of the windshield are measured respectively, and the transmittance of 905 nm near-infrared light at different incident angles of the information collection area S1 of the windshield is measured, and the results are listed in Table 2.

[0089] Table 2: Optical indicators of windshields of Example 2 and Comparative Example 2

[0090]

[0091] As can be seen from Table 2, the reflectivity of the non-information collection area S2 in Example 2 and Comparative Example 2 to P-polarized light is greater than 20%, and has a good head-up display function; in particular, the reflectivity of the non-information collection area S2 to red (629nm), green (529nm), and blue (469)nm P-polarized light is also greater than 20%, and the reflectivity difference between each other is less than or equal to 2.5%, so that the red, green, and blue HUD image colors in the head-up display (HUD) area are more uniform, and the reflectivity of the non-information collection area S2 to green (529nm) P-polarized light is greater than the reflectivity to red (629nm) or blue (469)nm P-polarized light; the reflection color Lab value and visible light transmittance TL of the non-information collection area S2 also indicate that the windshield can meet the safety requirements for automobile use and can present a beautiful light blue color when the windshield is observed from the outside.

[0092] In addition, compared with Comparative Example 2, the windshield of Example 2 is provided with an additional outermost dielectric layer 50 in the information collection area S1, so that the information collection area S1 has a high transmittance of more than 80% for the 905nm near-infrared rays incident at an incident angle of 0°~65°. The transmittance of the information collection area S1 of Comparative Example 2 for the 905nm near-infrared rays incident at an incident angle of 0°~65° is less than 80%, and as the incident angle increases, the transmittance of the information collection area S1 of Comparative Example 2 for the incident 905nm near-infrared rays increases. The transmittance is greatly reduced, even below 70%. The outermost dielectric layer 50 and the reflection-enhancing layer 40 of Example 2 form an anti-reflection structure together, so that the transmittance of the information collection area S1 of Example 2 to the 905nm near-infrared light incident at an incident angle of 0°~65° is increased by 8.3%~16.8%, which meets the requirements of the laser radar to be able to work normally within the maximum horizontal FOV (field of view) of 120°, improves the detection range and detection accuracy of the laser radar, and realizes the stability and accuracy of the built-in laser radar.

[0093] In addition, compared with Comparative Example 2, the windshield of Example 2 is further coated with a hydrophobic layer 60, which has anti-fouling and anti-fingerprint functions and can improve the cleanliness of the windshield.

[0094] Example 3

[0095] The windshield 100 in Example 3 includes laminated glass, a reflective enhancement layer 40, and an outermost dielectric layer 50, which are laminated in sequence. The laminated glass comprises an outer glass sheet 10, a polymer interlayer 30, and an inner glass sheet 20, which are laminated in sequence. Both the outer glass sheet 10 and the inner glass sheet 20 are ultra-clear glass, each with a thickness of 2.1 mm. The polymer interlayer 30 is polyvinyl butyral (PVB), with a thickness of 0.76 mm.

[0096] Reflection layer 40: deposited by magnetron sputtering coating line, on the fourth surface 22, in the direction away from the fourth surface 22, sequentially deposited high refractive index layer SiO x N y (high refractive index n = 1.71, extinction coefficient k = 0.00185, thickness 27.7 nm), low refractive index layer SiO2(thickness 38.9 nm), first high refractive index sub-layer SiNx(thickness 17.5 nm), second high refractive index sub-layer TiO x (thickness 47.7 nm), low refractive index layer SiO2(thickness 124.9 nm).

[0097] Outermost medium layer 50: deposited by magnetron sputtering coating line and mask plate, in the information collection area S1, the low refractive index layer SiO2directly deposited first medium sub-layer ZnSnOx(thickness 14.3 nm), second medium sub-layer TiO x (thickness 17.2 nm).

[0098] Comparative Example 3

[0099] Comparative Example 3 provides a windshield, which is different from the windshield 100 in Example 3 in that the outermost medium layer 50 is not provided in the windshield of Comparative Example 3.

[0100] The optical indicators of the windshields of Example 3 and Comparative Example 3 were measured: the P-polarized light reflectivity, visible light reflection color and visible light transmittance of the non-information collection area S2 of the windshield were measured, respectively, and the transmittance of 905 nm near-infrared light at different incident angles of the information collection area S1 of the windshield was measured, and the results were listed in Table 3.

[0101] Table 3: Optical indicators of the windshields of Example 3 and Comparative Example 3

[0102]

[0103] As can be seen from Table 3, the reflectivity of the non-information collection area S2 in Example 3 and Comparative Example 3 to P-polarized light is greater than 20%, which has a good head-up display function; in particular, the reflectivity of the non-information collection area S2 to P-polarized light of red (629 nm), green (529 nm) and blue (469 nm) is also greater than 20%, and the reflectivity difference between them is less than or equal to 1.7%, so that the red, green and blue three-color HUD images in the head-up display (HUD) area are more uniform, and the reflectivity of the non-information collection area S2 to P-polarized light of green (529 nm) is also greater than that of P-polarized light of red (629 nm) or blue (469 nm); the reflection color Lab value and the visible light transmittance TL of the non-information collection area S2 also show that the windshield can meet the safety requirements of automobile use and present a good light blue color when the windshield is observed from the outside.

[0104] In addition, compared with Comparative Example 3, the windshield of Example 3 additionally has the outermost medium layer 50 in the information collection area S1, so that the information collection area S1 has a high transmittance of greater than 80% to 905 nm near-infrared light incident at an incident angle of 0°~65°, while the transmittance of the information collection area S1 of Comparative Example 3 to 905 nm near-infrared light incident at an incident angle of 0°~65° is at most 80.2%, and the transmittance of the information collection area S1 of Comparative Example 3 to incident 905 nm near-infrared light decreases greatly with the increase of the incident angle, and is even lower than 70%. The outermost medium layer 50 and the reflection-increasing layer 40 of Example 3 jointly form an anti-reflection structure, so that the transmittance of the information collection area S1 of Example 3 to 905 nm near-infrared light incident at an incident angle of 0°~65° is increased by 6.1%~15.9%, which meets the normal working of the laser radar within a maximum horizontal FOV (field of view) of 120°, improves the detection range and detection accuracy of the laser radar, and realizes the stability and accuracy of the built-in laser radar.

[0105] Examples 4-6

[0106] Example 4: The windshield is basically the same as that of Example 1, except that the material of the outermost medium layer 50 is SiO x N y (refractive index n = 1.71, extinction coefficient k = 0.00185, thickness 78.5 nm).

[0107] Example 5: The windshield is basically the same as that of Example 1, except that the material of the outermost medium layer 50 includes two medium sub-layers, the material of the first medium sub-layer is TiOx (thickness 13.4 nm), and the material of the second medium sub-layer is SiO x N y(refractive index n = 1.71, extinction coefficient k = 0.00185, thickness 55.4 nm).

[0108] Example 6: substantially the same as the windshield of Example 1, except that the material of the outermost dielectric layer 50 comprises two dielectric sub-layers, the material of the first dielectric sub-layer is ZnSnOx (thickness 8.1 nm), and the material of the second dielectric sub-layer is SiO2 (thickness 98.9 nm).

[0109] The optical indicators of the windshields of Examples 4-6 were measured: the transmittance of 905 nm near-infrared light at different incident angles was measured on the information collection area S1 of the windshields, and the results were recorded in Table 4.

[0110] Table 4: Optical indicators of the windshields of Examples 4-6

[0111]

[0112] As can be seen from Table 4, compared with Example 1, although the transmittance of 905 nm near-infrared light at an incident angle of 65° of the information collection area S1 of Examples 4-6 is less than 80%, compared with Comparative Example 1, the information collection area S1 of Examples 4-6 has a high transmittance of 905 nm near-infrared light at an incident angle of 0°-60° of more than 80%, the transmittance of 905 nm near-infrared light at an incident angle of 0°-60° of the information collection area S1 of Comparative Example 1 is less than 80%, and as the incident angle increases, the transmittance of 905 nm near-infrared light of the information collection area S1 of Comparative Example 1 decreases significantly, even less than 70%, the outermost dielectric layer 50 and the anti-reflection layer 40 of Examples 4-6 jointly form a reflection-reducing structure, which increases the transmittance of 905 nm near-infrared light at an incident angle of 0°-60° of the information collection area S1 of Examples 4-6 by 2.6%-14.1%, improves the detection range and detection accuracy of the laser radar, and realizes the stability and accuracy of the operation of the built-in laser radar.

[0113] The above describes the windshield of the present application in detail, but the present application is not limited by the specific implementation described above, so any improvement, equivalent modification and replacement, etc. according to the technical key points of the present application, all fall within the scope of protection of the present application.

Claims

1. A windshield, characterized in that: The windshield comprises an outer glass sheet, a polymer interlayer, and an inner glass sheet, wherein the polymer interlayer is sandwiched between the outer glass sheet and the inner glass sheet, the outer glass sheet has a first surface and a second surface opposite to each other, the second surface facing the polymer interlayer, the inner glass sheet has a third surface and a fourth surface opposite to each other, the third surface facing the polymer interlayer, and the windshield has an information collection area and a non-information collection area; A reflection-enhancing layer is provided on the fourth surface, the reflection-enhancing layer covers the information collection area and the non-information collection area, and the reflection-enhancing layer is used to increase the reflectivity of the non-information collection area to P-polarized light of 380nm to 780nm; An outermost dielectric layer is also provided in the information collection area. The outermost dielectric layer is provided on a surface of the reflection-enhancing layer away from the fourth surface. The outermost dielectric layer and the reflection-enhancing layer are used to improve the transmittance of the information collection area to near-infrared rays of 780nm to 980nm.

2. The windshield according to claim 1, characterized in that The thickness of the reflection-enhancing layer is 100nm-500nm, and the reflection-enhancing layer includes at least one laminated structure. From the fourth surface toward the direction away from the outer glass plate, the laminated structure includes a high refractive index layer and a low refractive index layer deposited in sequence, the refractive index of the high refractive index layer is 1.7-2.7, and the refractive index of the low refractive index layer is 1.3-1.

6.

3. The windshield according to claim 2, characterized in that The high refractive index layer includes a plurality of high refractive index sublayers, or the reflection-enhancing layer includes at least two stacked-layer structures, the plurality of high refractive index layers include at least one first high refractive index layer and at least one second high refractive index layer, the first high refractive index layer is a single-layer high refractive index sublayer, and the second high refractive index layer includes a plurality of high refractive index sublayers; And / or, the low refractive index layer includes multiple low refractive index sublayers, or the reflection-enhancing layer includes at least two stacked structures, the multiple low refractive index layers include at least one first low refractive index layer and at least one second low refractive index layer, the first low refractive index layer is a single-layer low refractive index sublayer, and the second low refractive index layer includes multiple low refractive index sublayers.

4. The windshield according to claim 3, characterized in that At least one of the second high refractive index layers includes a first high refractive index sublayer and a second high refractive index sublayer stacked in sequence, the first high refractive index sublayer is closer to the fourth surface than the second high refractive index sublayer, the refractive index of the first high refractive index sublayer is 1.7 to 2.04, and the refractive index of the second high refractive index sublayer is 2.05 to 2.

7.

5. The windshield according to claim 4, characterized in that The material of the first high refractive index sublayer is SiOxNy, wherein 1<x≤3, 1<y<3, the thickness of the first high refractive index sublayer is 27nm~51nm, and the thickness of the second high refractive index sublayer is 45nm~60nm.

6. The windshield according to claim 1, wherein: The thickness of the outermost dielectric layer is 10 nm to 140 nm. The outermost dielectric layer includes at least one dielectric sublayer. The refractive index of the dielectric sublayer is 1.4 to 2.

7.

7. The windshield according to claim 6, characterized in that The refractive index of any of the dielectric sublayers is 2.0-2.7, and the material of the dielectric sublayer is selected from at least one of ZnSnOx, ZnAlOx, TiOx, NbOx, SiNx, ZrOx, and ZrSiNx.

8. The windshield according to claim 6, characterized in that The refractive index of any of the dielectric sub-layers is 2.2 to 2.7, and the thickness of the outermost dielectric layer is 10 nm to 70 nm.

9. The windshield according to claim 1, wherein: The transmittance of the information collection area to near-infrared light of 780nm to 980nm incident at an incident angle of 65° is greater than or equal to 80%, and the reflectivity of the non-information collection area to P-polarized light of 380nm to 780nm incident at an incident angle of 65° is greater than or equal to 20%.

10. The windshield according to claim 1, wherein: The reflectivity of the non-information collection area to P-polarized light with a wavelength of 629 nm incident at an incident angle of 65° is Y1, the reflectivity of the non-information collection area to P-polarized light with a wavelength of 529 nm incident at an incident angle of 65° is Y2, and the reflectivity of the non-information collection area to P-polarized light with a wavelength of 469 nm incident at an incident angle of 65° is Y3; |Y1-Y2|≤2.5%, |Y2-Y3|≤2.5%, |Y1-Y3|≤2.5%.

11. The windshield according to claim 10, characterized in that The Y1 is ≥ 20%, the Y2 is ≥ 20%, and the Y3 is ≥ 20%.

12. The windshield according to claim 1, wherein The windshield further includes a hydrophobic layer stacked on a surface of the outermost dielectric layer on a side away from the reflection-enhancing layer.

13. The windshield according to claim 12, wherein: The water contact angle of the hydrophobic layer is greater than 110°.

14. The windshield according to claim 12, wherein: The surface energy of the hydrophobic layer is ≤0.3 Jm-2, and the refractive index of the hydrophobic layer is ≤1.

6.

15. The windshield according to claim 1, wherein The outermost dielectric layer is only one dielectric sublayer, the refractive index of the dielectric sublayer is 2.2 to 2.7, and the thickness is 10 nm to 70 nm; or The outermost dielectric layer includes a first dielectric sublayer and a second dielectric sublayer, the total thickness of the first dielectric sublayer and the second dielectric sublayer is 10nm to 140nm, the first dielectric sublayer is in direct contact with the second side surface of the reflection-enhancing layer, and the refractive index of the first dielectric sublayer is 2.0 to 2.

7. The second dielectric sublayer is arranged on the second side surface away from the reflection-enhancing layer, and the refractive index of the second dielectric sublayer is 2.2 to 2.

7.

16. The windshield according to claim 1, wherein: The outermost dielectric layer and the reflection-enhancing layer together form an anti-reflection structure for near-infrared rays of 780nm to 980nm, so that the transmittance of the information collection area to near-infrared rays of 780nm to 980nm incident at an incident angle of 65° is greater than or equal to 80%.

17. A windshield assembly, characterized in that: The windshield comprises a laser radar, a head-up display projection device, and the windshield according to any one of claims 1 to 16, wherein the laser radar is used to emit and receive near-infrared rays of 780nm to 980nm, and the near-infrared rays pass through the information collection area; the head-up display projection device is used to generate P-polarized light of 380nm to 780nm, and the P-polarized light is incident on the non-information collection area.

18. The windshield assembly according to claim 17, wherein: The P-polarized light generated by the head-up display projection device includes at least 90% of a P-polarized component.

19. The windshield assembly according to claim 17, wherein: The near infrared rays emitted by the laser radar include at least 50% of P polarization components.

20. The windshield assembly according to claim 17, wherein: The P-polarized light generated by the head-up display projection device includes 100% of the P-polarized component, and the near-infrared light emitted by the laser radar includes 100% of the P-polarized component.

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