Windshields and Windshield Assemblies

Abstract

A windshield (100) and a windshield assembly (1000) are provided. The windshield (100) comprises an outer glass sheet (10), a polymer interlayer (30), and an inner glass sheet (20), the inner glass sheet (20) having opposing third and fourth surfaces (21 and 22), the third surface (21) facing the polymer interlayer (30), and the windshield (100) includes an information collecting region (S1) and a non-information collecting region (S2). The fourth surface (22) is provided with a reflection enhancing layer (40), which covers the information collecting region (S1) and the non-information collecting region (S2), and is used to enhance the reflectivity of the non-information collecting region (S2) for P-polarized light in the range of 380 nm to 780 nm. The information gathering region (S1) is further provided with an outermost medium layer (50), which is provided on the surface of the reflection enhancing layer (40) away from the fourth surface (22), and the outermost medium layer (50) and the reflection enhancing layer (40) are used to improve the transmittance of the information gathering region (S1) for near infrared rays of 780 nm to 980 nm. This windshield has high transmittance for rider signals and can realize a head-up display function.

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE This application relates to the field of glass products, and more particularly to windshields and windshield assemblies. [Background technology]

[0002] With the development of autonomous driving technology and the increasing need for additional functions in automobile windshields, more and more functions are being added to automobile windshields, such as a head-up display (HUD) function, defrosting and defogging function using electric heating, infrared reflective insulation function, and ultraviolet ray blocking function.

[0003] Lidar is a radar system that detects target location, speed, and other characteristics by emitting a laser beam. Lidar plays an irreplaceable role in the field of autonomous driving because of its high detection accuracy and high precision. There are two ways to install Lidar in a car: external and internal. External installation usually refers to installing Lidar on the roof, bonnet, fender, or front grille of a car. In this type of installation, Lidar is exposed to the outside air, so the accuracy of Lidar is affected by weather and environmental masses such as rain, wind, dust, high temperature, and low temperature. Internal installation refers to installing Lidar inside the cab of a car, which can avoid the influence of weather and the environment.

[0004] For built-in mounted lidar, the 905nm or 1550nm signals emitted and received by the lidar must pass through the windshield, but the windshield currently used to meet the need for thermal insulation has a high blocking rate for infrared rays of 780-2500nm, which cannot meet the requirements for normal operation and high-precision measurement of the lidar. Summary of the Invention

[0005] An object of the present application is to provide a windshield and a windshield assembly that have high transmittance for lidar signals, meet the requirements for built-in lidar use, and can realize head-up display function.

[0006] The present application provides a windshield. The windshield includes an outer glass sheet, a polymer interlayer, and an inner glass sheet, the polymer interlayer being sandwiched between the outer glass sheet and the inner glass sheet, the outer glass sheet having opposing first and second surfaces, the second surface facing the polymer interlayer, the inner glass sheet having opposing third and fourth surfaces, the third surface facing the polymer interlayer, and the windshield includes an information collecting region and a non-information collecting region. A reflection enhancing layer is provided on the fourth surface, the reflection enhancing layer covers the information collecting region and the non-information collecting region, and the reflection enhancing layer is used to improve the reflectance of the non-information collecting region for P-polarized light in the range of 380 nm to 780 nm. The information collecting region includes a reflection enhancing layer that enhances the reflectance of the non-information collecting region for P-polarized light in the range of 380 nm to 780 nm. is a medium There is a further layer of , medium The barrier layer is disposed on one surface of the reflection enhancing layer away from the fourth surface. , medium The porous layer and the reflection enhancing layer are used to improve the transmittance of the information collecting area to near infrared rays of 780 nm to 980 nm.

[0007] The reflection-enhancing layer has a thickness of 100 nm to 500 nm, and the reflection-enhancing layer includes at least one laminate structure, the laminate structure including a high refractive index layer and a low refractive index layer sequentially deposited from the fourth surface in a direction away from the outer glass plate, the high refractive index layer having a refractive index of 1.7 to 2.7, and the low refractive index layer having a refractive index of 1.3 to 1.6.

[0008] The high refractive index layer includes a plurality of high refractive index sub-layers, or the reflection-enhancing layer includes at least two stacked structures, and the plurality of high refractive index layers includes at least one first high refractive index layer and at least one second high refractive index layer, and the first high refractive index layer is a single high refractive index sub-layer, and the second high refractive index layer includes a plurality of high refractive index sub-layers; and / or The low refractive index layer includes a plurality of low refractive index sub-layers, or the reflection enhancement layer includes at least two laminated structures. The plurality of 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 sub-layer, and the second low refractive index layer includes a plurality of low refractive index sub-layers.

[0009] At least one second high refractive index layer includes a first high refractive index sub-layer and a second high refractive index sub-layer laminated in sequence. The first high refractive index sub-layer is closer to the fourth surface than the second high refractive index sub-layer. The first high refractive index sub-layer has a refractive index of 1.7 to 2.04, and the second high refractive index sub-layer has a refractive index of 2.05 to 2.7.

[0010] The material of the first high refractive index sub-layer is SiO x N y where 1 < x ≤ 3 and 1 < y < 3. The first high refractive index sub-layer has a thickness of 27 nm to 51 nm, and the second high refractive index sub-layer has a thickness of 45 nm to 60 nm.

[0011] Medium The quality layer has a thickness of 10 nm to 140 nm , medium The quality layer includes at least one medium sub-layer, and the medium sub-layer has a refractive index of 1.4 to 2.7.

[0012] Any one of the medium sub-layers has a refractive index of 2.0 to 2.7, and the material of the medium sub-layer is ZnSnO x ZnAlO x TiO x NbO x SiN x ZrO x ZrSiN x and is at least one of them.

[0013] Any one of the medium sub-layers has a refractive index of 2.2 to 2.7 , medium The quality layer has a thickness of 10 nm to 70 nm.

[0014] The information gathering region has a transmittance of 80% or more for near-infrared light of 780 nm to 980 nm incident at an incident angle of 65°, and the non-information gathering region has a reflectance of 20% or more for P-polarized light of 380 nm to 780 nm incident at an incident angle of 65°.

[0015] The reflectance of the non-information collecting region for P-polarized light with a wavelength of 629 nm incident at an incident angle of 65° is Y1, the reflectance of the non-information collecting region for P-polarized light with a wavelength of 529 nm incident at an incident angle of 65° is Y2, and the reflectance of the non-information collecting region for 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%, and |Y1-Y3|≦2.5%.

[0016] Y1 is 20% or more, Y2 is 20% or more, and Y3 is 20% or more.

[0017] The windshield further comprises a hydrophobic layer, the hydrophobic layer being spaced apart from the reflection-enhancing layer. Media It is laminated to one surface of the porous layer.

[0018] The hydrophobic layer has a water contact angle greater than 110°.

[0019] The hydrophobic layer is 0.3 Jm -2 and has a refractive index of 1.6 or less.

[0020] The present application provides a windshield assembly. The windshield assembly includes a lidar, a head-up display projection device, and the above-mentioned windshield. The lidar is used to emit and receive near-infrared radiation in the range of 780 nm to 980 nm, and the near-infrared radiation is Information collection area The head-up display projection device is used to generate P-polarized light with a wavelength of 380 nm to 780 nm. Information collection area is incident on

[0021] Generated by a head-up display projection device Biased The light contains at least a 90% P-polarized component.

[0022] The near-infrared radiation emitted by a lidar contains at least a 50% P-polarized component.

[0023] Generated by a head-up display projection device Biased The light contains a 100% P-polarized component, and the near-infrared light emitted by the lidar contains a 100% P-polarized component.

[0024] The present application provides a windshield and a windshield assembly. Media By adding a thermal barrier layer, it is possible to not only increase the reflectance of the windshield to P-polarized light of 380nm to 780nm, but also increase the transmittance of the windshield to near-infrared light of 780nm to 980nm. Therefore, the windshield can be used in combination with a lidar and a head-up display projection device, realizing high-precision measurement of the lidar, making the three colors of red, green and blue in the head-up display image more uniform, ensuring that the lidar can work normally within a horizontal field of view (FOV) of up to 120°, improving the detection range and detection accuracy of the lidar, and realizing the stability and accuracy of the built-in lidar's work. [Brief description of the drawings]

[0025] [Figure 1] FIG. 2 is a cross-sectional view of a windshield provided in a first embodiment of the present application. [Diagram 2] FIG. 2 is a top view of the windshield shown in FIG. [Diagram 3] 2 is a schematic diagram showing three example structures of the reflection-enhancing layer in the windshield shown in FIG. 1. [Figure 4] FIG. 2 is a schematic diagram showing the structure of a medium layer in the windshield shown in FIG. [Diagram 5] FIG. 2 is a cross-sectional view of a windshield provided in a second embodiment of the present application. [Figure 6]FIG. 2 is a schematic diagram showing the structure of a windshield assembly provided in an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] The contents of the present application will be further described below in conjunction with the drawings.

[0027] 1 and 2, FIG. 1 is a cross-sectional view of a windshield 100 provided in a first embodiment of the present application, and FIG. 2 is a top view of the windshield 100 shown in FIG. 1. The windshield 100 is made of a laminated glass, a reflection enhancing layer 40, and And medium The laminated glass comprises, laminated in sequence, an outer glass sheet 10, a polymer interlayer 30, and an inner glass sheet 20. The polymer interlayer 30 is sandwiched between the outer glass sheet 10 and the inner glass sheet 20. The inner glass sheet 20 faces the interior of the vehicle after the windshield 100 is installed in the vehicle. A reflective enhancing layer 40 is laminated to the inner glass sheet 20. , medium The reflectance layer 50 is laminated to the reflection enhancing layer 40 .

[0028] The windshield 100 includes an information collecting area S1 and a non-information collecting area S2, and the information collecting area S1 and the non-information collecting area S2 do not overlap. The information collecting area S1 is used to provide a signal transmission window area for information collection of an information collecting system (not shown). After the windshield 100 is installed on a vehicle, the information collecting system is provided inside the vehicle, and signals emitted and / or received by the information collecting system transmit through the information collecting area S1 of the windshield 100. The information collecting system in this application includes, but is not limited to, a lidar, an optical sensor, an infrared camera, a visible light camera, etc., and in this embodiment, a lidar is described as an example of the information collecting system. At least a part of the non-information collecting area S2 is used for a head up display (HUD), i.e., it is used as a HUD area to display information such as driving speed, dynamic navigation, road safety warnings, business district information, etc. The ratio of the area of ​​the information gathering region S1 to the area of ​​the windshield 100 is a maximum of 20%, and the ratio of the area of ​​the non-information gathering region S2 to the area of ​​the windshield 100 is a minimum of 50%.

[0029] Outer glass pane 10 has opposed first and second surfaces 11 and 12, with second surface 12 facing polymer interlayer 30, and inner glass pane 20 has opposed third and fourth surfaces 21 and 22, with third surface 21 facing polymer interlayer 30. After windshield 100 is installed in a vehicle, fourth surface 22 of inner glass pane 20 faces an information gathering system mounted inside the vehicle.

[0030] The reflection enhancing layer 40 is laminated on the fourth surface 22 of the inner glass plate 20, and the reflection enhancing layer 40 covers the information collecting region S1 and the non-information collecting region S2. Specifically, the reflection enhancing layer 40 has a first side surface 41 and a second side surface 42 facing each other, the first side surface 41 is attached to the fourth surface 22 of the inner glass plate 20, and the second side surface 42 is separated from the fourth surface 22. In the present application, the reflection enhancing layer 40 is used to improve the reflectance of the non-information collecting region S2 for P-polarized light of 380 nm to 780 nm. By providing the reflection enhancing layer 40 on the fourth surface 22, the reflectance of the non-information collecting region S2 for P-polarized light of 380 nm to 780 nm is improved, and the reflectance of the non-information collecting region S2 for P-polarized light of 380 nm to 780 nm incident at an incident angle of 65° is made 20% or more, thereby realizing a clear and ghost-free head-up display function.

[0031] In one embodiment, the reflectance of the non-information-gathering region S2 for P-polarized light (red P-polarized light) with a wavelength of 629 nm incident at an incident angle of 65° is Y1, the reflectance of the non-information-gathering region S2 for P-polarized light (green P-polarized light) with a wavelength of 529 nm incident at an incident angle of 65° is Y2, and the reflectance of the non-information-gathering region S2 for P-polarized light (blue P-polarized light) with a wavelength of 469 nm incident at an incident angle of 65° is Y3, where |Y1-Y2|≦2.5%, |Y2-Y3|≦2.5%, and |Y1-Y3|≦2.5%. That is, the reflectance of the non-information-gathering region S2 for the three colors of P-polarized light, red, green, and blue, is controlled so that the difference between any two of the reflectances is 2.5% or less. This makes it possible to make the three colors of red, green, and blue in the HUD image more uniform. In some embodiments, Y1≧20%, Y2≧20%, and Y3≧20%.

[0032] In the information gathering area S1 is a medium A layer 50 is further provided. , medium The layer 50 covers at least the information collection area S1. , medium The barrier layer 50 is disposed on the second surface 42 of the reflection enhancing layer 40, which is remote from the fourth surface 22. . MediumThe polymer layer 50 is laminated on the reflection-enhancing layer 40, and then cooperates with the reflection-enhancing layer 40 to form a reflection-reducing structure having a reflection-reducing effect on near-infrared rays of 780nm to 980nm, thereby improving the transmittance of the information gathering region S1 for near-infrared rays of 780nm to 980nm, and making the transmittance of the information gathering region S1 for near-infrared rays of 780nm to 980nm incident at an incident angle of 65° 80% or more, thereby meeting the requirements for normal operation and high-precision measurement of the lidar.

[0033] Medium The layer 50 includes at least one medium sub-layer, and the medium sub-layer has a refractive index between 1.4 and 2.7. . Medium The medium layer 50 may be a single medium sub-layer or may be a multi-layer medium sub-layer. The material of the medium sub-layer is SiO 2 , SiO x N y , ZnSnO x , ZnAlO x , TiO x , NbO x , SiN x , ZrO x , ZrSiN x At least one of the following is preferably used. , medium The medium layer 50 has a thickness of 10 nm to 140 nm, i.e., the total thickness of the medium sub-layers is 10 nm to 140 nm. . Medium The porous layer 50 can improve the transmittance of the information gathering region S1 to near-infrared radiation of 780 nm to 980 nm incident at angles of incidence of 0° to 60°, 0° to 65°, or even 0° to 74°, so that the LIDAR can operate normally within a horizontal FOV of up to 120°.

[0034] In the present application, the reflection enhancing layer 40 includes at least one laminate structure, and the laminate structure includes a high refractive index layer and a low refractive index layer sequentially stacked from the fourth surface toward the direction away from the outer glass plate, the high refractive index layer having a refractive index of 1.7 to 2.7, and the low refractive index layer having a refractive index of 1.3 to 1.6. By providing the reflection enhancing layer 40 with a laminate structure, the reflectance for P-polarized light of 380 nm to 780 nm can be improved. Specifically, for example, the reflection enhancing layer 40 can include one laminate structure, that is, a structure of the fourth surface 22 / high refractive index layer / low refractive index layer is formed. Alternatively, the reflection enhancing layer 40 can include two laminate structures, that is, a structure of the fourth surface 22 / high refractive index layer / low refractive index layer / high refractive index layer / low refractive index layer is formed. Alternatively, the reflection enhancing layer 40 can include three laminate structures, that is, a structure of the fourth surface 22 / high refractive index layer / low refractive index layer / high refractive index layer / low refractive index layer / high refractive index layer / low refractive index layer is formed. Alternatively, the reflection-enhancing layer 40 may include four stacked structures, i.e., the structure is the fourth surface 22 / high refractive index layer / low refractive index layer / high refractive index layer / low refractive index layer / high refractive index layer / low refractive index layer / high refractive index layer / low refractive index layer. Alternatively, the reflection-enhancing layer 40 may include five stacked structures, i.e., the structure is the fourth surface 22 / high refractive index layer / low refractive index layer / high refractive index layer / low refractive index layer / high refractive index layer / low refractive index layer / high refractive index layer / low refractive index layer / high refractive index layer / low refractive index layer. Furthermore, the reflection-enhancing layer 40 may include more stacked structures.

[0035] At least one high refractive index layer includes at least two high refractive index sub-layers, and / or at least one low refractive index layer includes at least two low refractive index sub-layers. In this application, "A and / or B" includes three schemes: A, B, A and B.

[0036] Specifically, in one embodiment, the high refractive index layer includes multiple high refractive index sub-layers. "Multiple" means two or more. That is, when the reflectance increasing layer 40 includes one stack structure, the high refractive index layer in the stack structure includes multiple high refractive index sub-layers. When the reflectance increasing layer 40 includes two or more stack structures, the high refractive index layer in each stack structure includes multiple high refractive index sub-layers.

[0037] In another embodiment, the reflection-enhancing layer 40 includes at least two stacked structures. That is, when the reflection-enhancing layer 40 includes more than two stacked structures, the reflection-enhancing layer 40 includes multiple high-index layers, the multiple high-index layers include a first high-index layer and a second high-index layer, there is at least one first high-index layer, there is at least one second high-index layer, the first high-index layer is a single high-index sub-layer, and the second high-index layer includes multiple high-index sub-layers.

[0038] Specifically, in one embodiment, the low refractive index layer includes multiple low refractive index sub-layers. That is, when the reflection-enhancing layer 40 includes one stack structure, the low refractive index layer in the stack structure includes multiple low refractive index sub-layers. When the reflection-enhancing layer 40 includes two or more stack structures, the low refractive index layer in each stack structure includes multiple low refractive index sub-layers.

[0039] In another embodiment, the reflection-enhancing layer 40 includes at least two stacked structures. That is, when the reflection-enhancing layer 40 includes more than two stacked structures, the reflection-enhancing layer 40 includes a plurality of low-refractive index layers, the plurality of low-refractive index layers includes a first low-refractive index layer and a second low-refractive index layer, there is at least one first low-refractive index layer, there is at least one second low-refractive index layer, the first low-refractive index layer is a single low-refractive index sub-layer, and the second low-refractive index layer includes a plurality of low-refractive index sub-layers.

[0040] Preferably, the reflectance increasing layer 40 has a thickness of 100 nm to 500 nm.

[0041] Referring to FIG. 3, FIG. 3 is a schematic diagram showing three specific structures of the reflection enhancement layer 40 in the windshield 100 shown in FIG. 1. FIG. 3(a) shows a laminated structure, that is, a reflection enhancement layer 40 including a high refractive index layer A / a low refractive index layer B. The high refractive index layer A includes two high refractive index sub-layers, that is, the high refractive index layer A includes a first high refractive index sub-layer A1 and a second high refractive index sub-layer A2 laminated in order. The first high refractive index sub-layer A1 is closer to the fourth surface 22 than the second high refractive index sub-layer A2. In this embodiment, the first high refractive index sub-layer A1 adheres to the fourth surface 22, and the second high refractive index sub-layer A2 is laminated on the first high refractive index sub-layer A1. The first high refractive index sub-layer A1 has a refractive index of 1.7 to 2.04, and the second high refractive index sub-layer A2 has a refractive index of 2.05 to 2.7. Preferably, the material of the first high refractive index sub-layer A1 is SiO x N y where 1 < x ≤ 3, 1 < y < 3, the first high refractive index sub-layer A1 has a thickness of 27 nm to 51 nm, and the second high refractive index sub-layer A2 has a thickness of 45 nm to 60 nm. FIG. 3(b) shows a laminated structure, that is, a reflection enhancement layer 40 including a high refractive index layer A / a low refractive index layer B. FIG. 3(c) shows two laminated structures, that is, a reflection enhancement layer 40 including a high refractive index layer A / a low refractive index layer B / a high refractive index layer A / a low refractive index layer B.

[0042] In this application, the material of the high refractive index layer is SiN x 、SiAlN x 、SiBN x 、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 、Z nSnOx The low refractive index layer can be made of SiO x , SiBO x , SiTiO x , SiAlO x , SiZrO x Any one of the above can be used, and the low refractive index layer has a thickness of 35 nm to 60 nm.

[0043] Referring to FIG. 4, FIG. 4 shows the windshield 100 shown in FIG. Media 4 is a schematic diagram showing the structure of a medium layer 50. In FIG. 4, (a) shows only one medium sub-layer. Media FIG. 2 is a schematic diagram showing the structure of a medium layer 50; (a) has two medium sub-layers; Medium Layer 4(a) is a schematic diagram showing the structure of 50. , medium The medium layer 50 is only one medium sub-layer 511, and the medium sub-layer 511 has a refractive index of 2.2 to 2.7 and a thickness of 10 nm to 70 nm. As shown in FIG. , medium The material layer 50 includes two medium sublayers, that is, a first medium sublayer 521 and a second medium sublayer 522. The first medium sublayer 521 and the second medium sublayer 522 have a total thickness of 10 nm to 140 nm, the first medium sublayer 521 is in direct contact with the second surface 42 of the reflection-enhancing layer 40, and the first medium sublayer 521 has a refractive index of 2.0 to 2.7, and the second medium sublayer 522 is provided away from the second surface 42 of the reflection-enhancing layer 40, and the second medium sublayer 522 has a refractive index of 2.2 to 2.7. This is not a limitation, and the present application will use the following as another example. , medium The layer 50 is only one medium sub-layer, and the medium sub-layer has a refractive index of 1.4 to 1.6 or 1.7 to 2.0. , medium The layer 50 includes two medium sub-layers, one having a refractive index between 1.4 and 1.9, and the other having a refractive index between 2.0 and 2.7. , medium The medium layer 50 may include multiple medium sub-layers, for example, 3, 5, 8, etc.

[0044] 5 is a cross-sectional view of a windshield 100 provided in a second embodiment of the present application. The windshield 100 of this embodiment further includes a hydrophobic layer 60, and the hydrophobic layer 60 is separated from the reflection-enhancing layer 40. Media 5 differs from the windshield 100 of FIG 1 in that the outer glass sheet 10, the polymer interlayer 30, the inner glass sheet 20, the reflection enhancing layer 40, and the like are laminated on one surface of the polymer layer 50. Specifically, the windshield 100 of FIG 5 includes an outer glass sheet 10, a polymer interlayer 30, an inner glass sheet 20, a reflection enhancing layer 40, and a Medium Layer 50, and a hydrophobic layer 60. The hydrophobic layer 60 has a water contact angle of more than 110° and a thickness of less than 50 nm, and has functions such as hydrophobicity and antifouling, and further has an anti-fingerprint effect.

[0045] In some embodiments, the hydrophobic layer 60 is an organic polymer film layer prepared by a sol-gel process, for example, the material of the hydrophobic layer 60 may be an anti-fingerprint (AF) material. The AF material may be at least one of heptadecafluorodecyltrimethoxysilane, tridecafluorotriethoxysilane, decatrifluoropropyltrimethoxysilane, dodecafluoroheptylpropyltrimethoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, methyltrichlorosilane, methyldichlorododecylsilane, dimethyldichlorosilane, methylphenyldichlorosilane, methylvinyldichlorosilane, or 3,3,3-trifluoropropyltrichlorosilane.

[0046] In some embodiments, the material of the hydrophobic layer 60 is an AF material with low surface energy, e.g., less than 0.3 Jm -2 The AF material has the following surface energy and a refractive index of 1.6 or less. By using a material with low surface energy, the anti-fingerprint effect is superior.

[0047] In some embodiments of the present application, at least one of the outer glass sheet 10 and the inner glass sheet 20 is ultra-clear glass. Preferably, both the outer glass sheet 10 and the inner glass sheet 20 are also ultra-clear glass. The total iron content of the ultra-clear glass is 0.015% wt or less, and the visible light transmittance of the ultra-clear glass is 91% or more. The adoption of the ultra-clear glass is advantageous in improving the transmittance of the windshield 100 to near-infrared rays of 780 nm to 980 nm emitted and received by the lidar, thereby improving the detection accuracy of the lidar. The polymer interlayer 30 may be at least one of polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), and ionic interlayer (SGP).

[0048] Referring to FIG. 6, an embodiment of the present application further provides a windshield assembly 1000 including a windshield 100, a LIDAR 200, and a head-up display projection device 300. Both the LIDAR 200 and the head-up display projection device 300 are mounted inside the vehicle. The LIDAR 200 is used to emit and receive near-infrared radiation from 780 nm to 980 nm. The near-infrared radiation is Information collection area In this embodiment, the near infrared ray emitted by the lidar 200 passes through , medium The near infrared radiation is transmitted through the outer glass pane 10, the polymer interlayer 30, the inner glass pane 20, the reflection enhancing layer 40, the polymer interlayer 30, the inner glass pane 20, the reflection enhancing layer 40, and the outer glass pane 10 in this order to reach the exterior of the vehicle. And medium The light is then transmitted through the layer 50 and finally received by the lidar 200 located inside the vehicle. The head-up display projection device 300 is used to generate P-polarized light of 380 nm to 780 nm. Information collection area In this embodiment, the P polarized light is incident on the non-polarized light S2. Information collection area The light is incident on the reflection enhancing layer 40 located at S2.

[0049] Information collection area S1 MediatorThe reflection-reducing structure is formed by the reflection-enhancing layer 40 and the insulating layer 50. The reflection-reducing structure is formed by the reflection-enhancing layer 40 and the reflection-reducing layer 50. Information collection area The near-infrared light includes a P-polarized component and an S-polarized component. In order to further improve the detection accuracy of the lidar, the near-infrared light preferably includes at least 50% P-polarized component, specifically, for example, 50%, 55%, 60%, 70%, 80%, 90%, 95%, 100% P-polarized component. More preferably, the near-infrared light includes 100% P-polarized component. Including 100% P-polarized component means that the near-infrared light emitted by the lidar is pure P-polarized, which can be understood as being completely or almost completely P-polarized.

[0050] Non Information collection area The reflection enhancing layer 40 of S2 can reflect P-polarized light of 380 nm to 780 nm. In order to improve the clarity and contrast of the head-up display image, it is preferable to use a head-up display projection device. Biased The light includes at least 90% P-polarized component, and more specifically, for example, includes 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% P-polarized component. More preferably, the light generated by the head-up display projection device includes at least 90% P-polarized component, and more preferably, ... Biased The light contains 100% P-polarized component, which is generated by a head-up display projection device. Biased It means that the light is pure P polarized, which can be understood as being completely or nearly completely P polarized. EXAMPLES

[0051] Hereinafter, the reflection enhancing layer 40 and And medium The windshield 100 will now be described with reference to a specific example of the plastic layer 50 .

[0052] Rf(λ)-θ indicates the reflectance of the non-information-gathering region of the windshield to P-polarized light of wavelength λ incident from the fourth surface side at an incident angle θ. In this application, Rf(469 nm)-65°, Rf(529 nm)-65°, and Rf(629 nm)-65°, i.e., the reflectance of the non-information-gathering region to P-polarized light of wavelengths 469 nm, 529 nm, and 629 nm incident from the fourth surface side at an incident angle of 65°, are taken as examples.

[0053] L, a, b indicate the reflected color detected at the first surface 11 of the windshield 100 according to the CIE Lab color model. L is the luminance value, a is the red-green chromaticity value, and b is the yellow-blue chromaticity value.

[0054] TL indicates the visible light transmittance detected and calculated according to the ISO 9050 standard. The wavelength range of visible light is 380nm to 780nm.

[0055] T(λ)-θ represents the transmittance of the information-gathering area of ​​the windshield for near-infrared rays having a wavelength λ incident at an angle of incidence θ. 0 Take as an example the transmittance of the information collecting area for near-infrared rays with a wavelength of 905 nm incident at angles of incidence of 0°, 15°, 30°, 45°, 60°, and 65°, respectively: T(905)-15°, T(905)-30°, T(905)-45°, T(905)-60°, and T(905)-65°. <Example 1>

[0056] The windshield 100 of Example 1 is a laminated glass, a reflection enhancing layer 40, and a glass substrate 100. , medium The laminated glass comprises, laminated in order, an outer glass sheet 10, a polymer interlayer 30, and an inner glass sheet 20. The outer glass sheet 10 and the inner glass sheet 20 are both 2.1 mm thick extra clear glass, and the polymer interlayer 30 is 0.76 mm thick Polyvinyl butyral (PVB).

[0057] The reflection enhancing layer 40 is fabricated by coating deposition using a magnetron sputtering deposition line. Specifically, a first high refractive index sub-layer SiO 2 is deposited on the fourth surface 22 of the inner glass plate 20 in a direction away from the fourth surface 22. x N y (Refractive index n = 1.71, extinction coefficient k = 0.00185, thickness 50.2 nm), second high refractive index sub-layer TiO x (Thickness 52.7 nm), low refractive index layer SiO 2 (thickness 117 nm) are deposited in order.

[0058] Medium The low refractive index layer 50 is fabricated by localized coating deposition using a magnetron sputtering deposition line and a masking plate. 2 On top, one medium sub-layer Nb 2 O 5 (Thickness 36.6 nm) is deposited directly.

[0059] The hydrophobic layer 60 is And medium After preparing the laminated glass including the hydrophobic 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 heptadecafluorodecyltrimethoxysilane, and the thickness of the hydrophobic layer 60 is 15 nm. The hydrophobic layer 60 is formed on the information collection area S1. Mediator The reflection enhancing layer 40 covers the insulating layer 50 and the non-information gathering region S2. <Comparative Example 1>

[0060] Comparative Example 1 provides a windshield. is a medium This windshield differs from the windshield 100 of the first embodiment in that the hydrophilic layer 50 and the hydrophobic layer 60 are not provided.

[0061] The optical indices of the windshields of Example 1 and Comparative Example 1 are measured. For the non-information-gathering region S2 of the windshield, the P-polarized reflectance, visible light reflection color, visible light transmittance, etc. are detected, and for the information-gathering region S1 of the windshield, the transmittance of 905 nm near-infrared light incident at different angles of incidence is detected. The results are recorded in Table 1.

[0062] [Table 1]

[0063] As can be seen from Table 1, in both Example 1 and Comparative Example 1, the P-polarized light reflectance of the non-information-gathering region S2 is greater than 20%, and a good head-up display function can be realized. In particular, the reflectances of the non-information-gathering region S2 for red (629 nm), green (529 nm), and blue (469 nm) P-polarized light are all greater than 20%, and the difference between the reflectances is 2.5% or less, so that the three colors of red, green, and blue in the head-up display (HUD) region are more uniform. In addition, in the non-information-gathering region S2, the reflectance for green (529 nm) P-polarized light is greater than the reflectance for red (629 nm) or blue (469 nm) P-polarized light. The reflected color Lab value and visible light transmittance TL of the non-information-gathering region S2 further indicate that the windshield can meet the safety requirements for use in a vehicle, and can present a good-looking light blue color when viewed from the outside.

[0064] In addition, compared to Comparative Example 1, in the windshield of Example 1, MediaSince the insulating layer 50 is additionally provided, the information gathering region S1 has a high transmittance of more than 80% for 905 nm near infrared rays incident at incident angles of 0° to 65°. The information gathering region S1 of Comparative Example 1 has a transmittance of less than 80% for all 905 nm near infrared rays incident at incident angles of 0° to 65°. Moreover, the transmittance of the information gathering region S1 of Comparative Example 1 for incident 905 nm near infrared rays decreases significantly as the incident angle increases, and further becomes less than 70%. . Medium The polymer layer 50 forms a reflection reducing structure together with the reflection enhancing layer 40 of the first embodiment, thereby improving the transmittance of the information collecting region S1 of the first embodiment for near infrared rays of 905 nm incident at an incident angle of 0° to 65° by 8.1% to 17.5%. This satisfies that the LIDAR can operate normally within a horizontal field of view (FOV) of up to 120°, thereby improving the detection range and detection accuracy of the LIDAR and realizing the stability and accuracy of the built-in LIDAR operation.

[0065] In addition, compared to Comparative Example 1, the windshield of Example 1 is further coated with a hydrophobic layer 60, so that the windshield of Example 1 has the function of preventing dirt and fingerprints, and can improve the cleanliness of the windshield. <Example 2>

[0066] The windshield 100 of Example 2 is a laminated glass, a reflection enhancing layer 40, and a glass substrate 100. , medium The laminated glass comprises, laminated in order, an outer glass sheet 10, a polymer interlayer 30, and an inner glass sheet 20. Both the outer glass sheet 10 and the inner glass sheet 20 are extra clear glass having a thickness of 2.1 mm, and the polymer interlayer 30 is polyvinyl butyral having a thickness of 0.76 mm.

[0067] The reflection enhancing layer 40 is fabricated by coating deposition using a magnetron sputtering deposition line. Specifically, a high refractive index layer SiO x N y(Refractive index n=1.71, extinction coefficient k=0.00185, thickness 27.6 nm), low refractive index layer SiO 2 (Thickness 56.5 nm), high refractive index layer TiO x (Thickness 57.3 nm), low refractive index layer SiO 2 (Thickness 120.5 nm) are deposited in order.

[0068] Medium The low refractive index layer 50 is fabricated by localized coating deposition using a magnetron sputtering deposition line and a masking plate. 2 On top of that, one medium sub-layer, TiO x (thickness 25.5 nm) is directly deposited.

[0069] The hydrophobic layer 60 is And medium After preparing the laminated glass including the hydrophobic 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 heptadecafluorodecyltrimethoxysilane, and the thickness of the hydrophobic layer 60 is 15 nm. The hydrophobic layer 60 is formed on the information collection area S1. Mediator The reflection enhancing layer 40 covers the insulating layer 50 and the non-information gathering region S2. <Comparative Example 2>

[0070] Comparative Example 2 provides a windshield. is a medium This windshield differs from the windshield 100 of the second embodiment in that the hydrophilic layer 50 and the hydrophobic layer 60 are not provided.

[0071] The optical indices of the windshields of Example 2 and Comparative Example 2 are measured. For the non-information-gathering region S2 of the windshield, the P-polarized reflectance, visible light reflection color, visible light transmittance, etc. are detected, and for the information-gathering region S1 of the windshield, the transmittance of 905 nm near-infrared light incident at different angles of incidence is detected. The results are recorded in Table 2.

[0072] [Table 2]

[0073] As can be seen from Table 2, in both Example 2 and Comparative Example 2, the P-polarized light reflectance of the non-information-gathering region S2 is greater than 20%, and a good head-up display function can be realized. In particular, the reflectance of the non-information-gathering region S2 for P-polarized light of red (629 nm), green (529 nm), and blue (469 nm) is greater than 20%, and the difference between the reflectances is less than 2.5%, so that the three colors of red, green, and blue in the head-up display (HUD) region are more uniform. In addition, in the non-information-gathering region S2, the reflectance for P-polarized light of green (529 nm) is greater than the reflectance for P-polarized light of red (629 nm) or blue (469 nm). The reflected color Lab value and visible light transmittance TL of the non-information-gathering region S2 further show that the windshield can meet the safety requirements for use in a car, and can present a good-looking light blue color when viewed from the outside.

[0074] In addition, compared to Comparative Example 2, in the windshield of Example 2, in the information gathering area S1 Media Since the insulating layer 50 is additionally provided, the information gathering region S1 has a high transmittance of more than 80% for 905 nm near infrared rays incident at incident angles of 0° to 65°. The information gathering region S1 of Comparative Example 2 has a transmittance of less than 80% for all 905 nm near infrared rays incident at incident angles of 0° to 65°. Moreover, the transmittance of the information gathering region S1 of Comparative Example 2 for incident 905 nm near infrared rays decreases significantly as the incident angle increases, and further becomes less than 70%. . Medium The layer 50 is an embodiment of the present invention. 2 By forming a reflection reducing structure together with the reflection enhancing layer 40, the transmittance of the information collecting region S1 of the second embodiment for near infrared rays of 905 nm incident at an incident angle of 0° to 65° is improved by 8.3% to 16.8%. This satisfies that the LIDAR can operate normally within a horizontal field of view (FOV) of up to 120°, thereby improving the detection range and detection accuracy of the LIDAR and realizing the stability and accuracy of the built-in LIDAR operation.

[0075] In addition, compared to Comparative Example 2, the windshield of Example 2 is further coated with a hydrophobic layer 60, so that the windshield of Example 2 has the function of preventing dirt and fingerprints, and can improve the cleanliness of the windshield. <Example 3>

[0076] The windshield 100 of Example 3 is made up of a laminated glass, a reflection enhancing layer 40, and And medium The laminated glass comprises, laminated in order, an outer glass sheet 10, a polymer interlayer 30, and an inner glass sheet 20. The outer glass sheet 10 and the inner glass sheet 20 are both extra clear glass having a thickness of 2.1 mm, and the polymer interlayer 30 is polyvinyl butyral having a thickness of 0.76 mm.

[0077] The reflection enhancing layer 40 is fabricated by coating deposition using a magnetron sputtering deposition line. Specifically, a high refractive index layer SiO x N y (Refractive index n=1.71, extinction coefficient k=0.00185, thickness 27.7 nm), low refractive index layer SiO 2 (Thickness 38.9 nm), first high refractive index sub-layer SiN x (17.5 nm thick), second high refractive index sub-layer TiO x (Thickness 47.7 nm), low refractive index layer SiO 2 (thickness 124.9 nm) are deposited in order.

[0078] Medium The low refractive index layer 50 is fabricated by localized coating deposition using a magnetron sputtering deposition line and a masking plate. 2 On top of that, the first medium sub-layer ZnSnOx (thickness 14.3 nm) and the second medium sub-layer TiO x (thickness 17.2 nm) is deposited directly. <Comparative Example 3>

[0079] A windshield of Comparative Example 3 was provided, and the windshield of Comparative Example 3 was is a medium This windshield differs from the windshield 100 of the third embodiment in that the insulating layer 50 is not provided.

[0080] The optical indices of the windshields of Example 3 and Comparative Example 3 are measured. For the non-information-gathering region S2 of the windshield, the P-polarized reflectance, visible light reflection color, visible light transmittance, etc. are detected, and for the information-gathering region S1 of the windshield, the transmittance of 905 nm near-infrared light incident at different angles of incidence is detected. The results are recorded in Table 3.

[0081] [Table 3]

[0082] As can be seen from Table 3, in both Example 3 and Comparative Example 3, the P-polarized light reflectance of the non-information-gathering region S2 is greater than 20%, and a good head-up display function can be realized. In particular, the reflectance of the non-information-gathering region S2 for P-polarized light of red (629 nm), green (529 nm), and blue (469 nm) is greater than 20%, and the difference between the reflectances is less than 1.7%, so that the three colors of red, green, and blue in the head-up display (HUD) region are more uniform. In addition, in the non-information-gathering region S2, the reflectance for P-polarized light of green (529 nm) is greater than the reflectance for P-polarized light of red (629 nm) or blue (469 nm). The reflected color Lab value and visible light transmittance TL of the non-information-gathering region S2 further show that the windshield can meet the safety requirements for use in a car, and can present a good-looking light blue color when viewed from the outside.

[0083] In addition, compared to Comparative Example 3, in the windshield of Example 3, MediaSince the insulating layer 50 is additionally provided, the information gathering region S1 has a high transmittance of more than 80% for the 905 nm near infrared rays incident at an incident angle of 0° to 65°. The information gathering region S1 of Comparative Example 3 has a maximum transmittance of 80.2% for the 905 nm near infrared rays incident at an incident angle of 0° to 65°. Moreover, the transmittance of the information gathering region S1 of Comparative Example 3 for the incident 905 nm near infrared rays decreases significantly as the incident angle increases, and further becomes less than 70%. . Medium The polymer layer 50 forms a reflection reducing structure together with the reflection enhancing layer 40 of the third embodiment, thereby improving the transmittance of the information collecting region S1 of the third embodiment for the 905 nm near infrared light incident at an incident angle of 0° to 65° by 6.1% to 15.9%. This satisfies that the LIDAR can operate normally within a horizontal field of view (FOV) of up to 120°, thereby improving the detection range and detection accuracy of the LIDAR and realizing the stability and accuracy of the built-in LIDAR operation. <Examples 4 to 6>

[0084] The windshield of the fourth embodiment is almost the same as the windshield of the first embodiment. Mediator The material of the porous layer 50 is SiO x N y (refractive index n=1.71, extinction coefficient k=0.00185, thickness 78.5 nm).

[0085] The windshield of Example 5 is almost the same as the windshield of Example 1. Mediator 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).

[0086] The windshield of Example 6 is almost the same as the windshield of Example 1. MediatorThe material of the first medium sub-layer is ZnSnOx (thickness 8.1 nm), and the material of the second medium sub-layer is SiO 2 (thickness 98.9 nm).

[0087] The optical indices of the windshields of Examples 4 to 6 are measured. The transmittance of near-infrared light at 905 nm was measured at different angles of incidence for the information gathering area S1 of the windshield. The results are recorded in Table 4.

[0088] [Table 4]

[0089] As can be seen from Table 4, compared to Example 1, the transmittance of the information gathering region S1 of Examples 4 to 6 for 905 nm near-infrared radiation incident at an incident angle of 65° is less than 80%, but compared to Comparative Example 1, the high transmittance of the information gathering region S1 of Examples 4 to 6 for 905 nm near-infrared radiation incident at incident angles of 0° to 60° is higher than 80%, and the transmittance of the information gathering region S1 of Comparative Example 1 for 905 nm near-infrared radiation incident at incident angles of 0° to 60° is all less than 80%. In addition, the transmittance of the information gathering region S1 of Comparative Example 1 for incident 905 nm near-infrared radiation decreases significantly as the incident angle increases, and further becomes smaller than 70%. . Medium The polymer layer 50 forms a reflection reducing structure together with the reflective layer 40 of Examples 4 to 6, thereby improving the transmittance of the information collection area S1 of Examples 4 to 6 by 2.6% to 14.1% for near infrared rays of 905 nm incident at an incident angle of 0° to 60°. This improves the detection range and detection accuracy of the LIDAR, and realizes the stability and accuracy of the built-in LIDAR operation.

[0090] The above is a specific description of the windshield of the present application, but the present application is not limited to the content of the specific embodiments described above, and all improvements, equivalent modifications, replacements, etc. based on the technical points of the present application belong to the protection scope of the present application.

Claims

1. A windshield, a windshield comprising an outer glass sheet, a polymer interlayer, and an inner glass sheet, the polymer interlayer being sandwiched between the outer glass sheet and the inner glass sheet, the outer glass sheet having opposing first and second surfaces, the second surface facing the polymer interlayer, the inner glass sheet having opposing third and fourth surfaces, the third surface facing the polymer interlayer, the windshield including information gathering regions and non-information gathering regions; a reflection enhancing layer is provided on the fourth surface, the reflection enhancing layer covers the information collecting region and the non-information collecting region, the reflection enhancing layer is used to improve the reflectance of the non-information collecting region for P-polarized light of 380 nm to 780 nm; The information collecting region is further provided with a medium layer, the medium layer being provided on one surface of the reflection enhancing layer away from the fourth surface, and the medium layer and the reflection enhancing layer are used to improve the transmittance of the information collecting region for near infrared rays of 780 nm to 980 nm. A windshield characterized by:

2. the reflection-enhancing layer has a thickness of 100 nm to 500 nm, the reflection-enhancing layer includes at least one laminate structure, the laminate structure including a high refractive index layer and a low refractive index layer deposited in sequence from the fourth surface in a direction away from the outer glass sheet, the high refractive index layer having a refractive index of 1.7 to 2.7, and the low refractive index layer having a refractive index of 1.3 to 1.6; 2. The windshield of claim 1.

3. The high refractive index layer includes a plurality of high refractive index sub-layers, or the reflection enhancing layer includes at least two stacked 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 high refractive index sub-layer, and the second high refractive index layer includes a plurality of high refractive index sub-layers; and / or The low refractive index layer includes a plurality of low refractive index sub-layers, or the reflection enhancing layer includes at least two stacked structures, the plurality of 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 low refractive index sub-layer, and the second low refractive index layer includes a plurality of low refractive index sub-layers.

3. The windshield of claim 2.

4. 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 being closer to the fourth surface than the second high refractive index sublayer, the first high refractive index sublayer having a refractive index of 1.7 to 2.04, and the second high refractive index sublayer having a refractive index of 2.05 to 2.7; 4. The windshield of claim 3.

5. The material of the first high refractive index sub-layer is SiO ｘ N ｙ wherein 1<x≦3 and 1<y<3, the first high refractive index sublayer has a thickness of 27 nm to 51 nm, and the second high refractive index sublayer has a thickness of 45 nm to 60 nm.

5. The windshield of claim 4.

6. the medium layer has a thickness of 10 nm to 140 nm, the medium layer includes at least one medium sub-layer, and the medium sub-layer has a refractive index of 1.4 to 2.7; 2. The windshield of claim 1.

7. Any one of the medium sub-layers has a refractive index of 2.0 to 2.7, and the material of the medium sub-layer is ZnSnO ｘ , ZnAlO ｘ , TiO ｘ , NbO ｘ , SiN ｘ , ZrO ｘ , ZrSiN ｘ At least one of 7. The windshield of claim 6.

8. Any one of the medium sub-layers has a refractive index of 2.2 to 2.7, and the medium layer has a thickness of 10 nm to 70 nm.

7. The windshield of claim 6.

9. The information collecting area has a transmittance of 80% or more for near infrared light of 780 nm to 980 nm incident at an incident angle of 65°, and the non-information collecting area has a reflectance of 20% or more for P-polarized light of 380 nm to 780 nm incident at an incident angle of 65°.

2. The windshield of claim 1.

10. The reflectance of the non-information collecting region for P-polarized light having a wavelength of 629 nm incident at an incident angle of 65° is Y1, the reflectance of the non-information collecting region for P-polarized light having a wavelength of 529 nm incident at an incident angle of 65° is Y2, and the reflectance of the non-information collecting region for P-polarized light having 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%, 2. The windshield of claim 1.

11. The Y1 is 20% or more, the Y2 is 20% or more, and the Y3 is 20% or more.

11. The windshield of claim 10.

12. The windshield further comprises a hydrophobic layer, the hydrophobic layer being laminated on one surface of the medium layer away from the reflection enhancing layer.

2. The windshield of claim 1.

13. The hydrophobic layer has a water contact angle of greater than 110°, the hydrophobic layer has a surface energy of 0.3 Jm −2 or less, and a refractive index of 1.6 or less.

13. The windshield of claim 12.

14. The medium layer is only one medium sub-layer, and the medium sub-layer has a refractive index of 2.2 to 2.7 and a thickness of 10 nm to 70 nm; Alternatively, the medium layer includes a first medium sublayer and a second medium sublayer, the first medium sublayer and the second medium sublayer having a total thickness of 10 nm to 140 nm, the first medium sublayer is in direct contact with the second surface of the reflection enhancing layer, the first medium sublayer having a refractive index of 2.0 to 2.7, and the second medium sublayer is provided away from the second surface of the reflection enhancing layer, the second medium sublayer having a refractive index of 2.2 to 2.

7.

2. The windshield of claim 1.

15. 1. A windshield assembly comprising: A vehicle comprising: a lidar; a head-up display projection device; and the windshield according to any one of claims 1 to 14, The LIDAR is used to emit and receive near infrared radiation from 780 nm to 980 nm, the near infrared radiation passing through the information gathering area, and the head-up display projection device is used to generate P-polarized light from 380 nm to 780 nm, the P-polarized light being incident on the non-information gathering area. A windshield assembly comprising:

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