Head-up display glass, head-up display system and vehicle

Abstract

The embodiment of the invention provides head-up display glass, a head-up display system and a vehicle, the head-up display glass comprises a glass body, a reflecting layer and a cleaning layer, the glass body comprises an inner surface and an outer surface, and the outer surface and the inner surface are oppositely arranged in the thickness direction of the glass body; the reflecting layer is connected to the inner surface of the glass body in a stacked mode in the thickness direction of the head-up display glass, the reflecting layer comprises a first face and a second face, the first face and the second face are oppositely arranged in the thickness direction of the reflecting layer, and the second face is connected to the inner surface; along the thickness direction of the head-up display glass, the cleaning layer is laminated and connected to the first surface of the reflecting layer; the projection of the reflecting layer is completely located in the projection of the glass body in the thickness direction of the head-up display glass; the water contact angle between the surface of the cleaning layer and stains is larger than or equal to 80 degrees. The problems that the surface, facing the interior of the vehicle, of the head-up display glass is prone to being stained with stains and the stains are difficult to erase are solved, and potential safety hazards are avoided.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and in particular to a head-up display glass, a head-up display system and a vehicle. Background Art

[0002] In recent years, with the development of science and technology and economy, the glass of vehicles has transformed from traditional safety and comfort to multi-functional and intelligent. In particular, the head-up display (HUD) function is more and more widely used in automotive glass. Existing display glass usually has a display layer on the surface facing the interior of the vehicle to achieve the head-up display function. However, the display layer is easily stained, and the stains are not easy to wipe off. During the use of the display glass, if the stains are not wiped clean, it will affect the effect of the head-up display and easily pose a safety hazard. Summary of the invention

[0003] The purpose of the present application is to provide a head-up display glass, a head-up display system and a vehicle, which solves the problem that the surface of the head-up display glass facing the interior of the vehicle is easily stained and the stains are difficult to wipe off, prevents the stains from affecting the effect of the head-up display, and avoids safety hazards.

[0004] In a first aspect, an embodiment of the present application provides a head-up display glass. The head-up display glass comprises:

[0005] A glass body, wherein the glass body comprises an inner surface and an outer surface, wherein the outer surface and the inner surface are arranged opposite to each other along a thickness direction of the glass body;

[0006] A reflective layer, along the thickness direction of the head-up display glass, the reflective layer is laminated and connected to the inner surface of the glass body, the reflective layer includes a first surface and a second surface, the first surface and the second surface are arranged opposite to each other along the thickness direction of the reflective layer, and the second surface is connected to the inner surface; and

[0007] a cleaning layer, along the thickness direction of the head-up display glass, the cleaning layer being laminated and connected to the first surface of the reflective layer;

[0008] Along the thickness direction of the head-up display glass, the projection of the reflective layer is completely located within the projection of the glass body;

[0009] The water contact angle between the surface of the cleaning layer and the dirt is greater than or equal to 80°.

[0010] In one embodiment, the cleaning layer has a thickness greater than or equal to 1 nm and less than or equal to 50 nm.

[0011] In one embodiment, the cleaning layer includes a plurality of protrusions, the plurality of protrusions are formed on the first surface of the reflective layer, and the plurality of protrusions are spaced apart from each other.

[0012] In one embodiment, the protrusion is an arc-shaped protrusion, and the radius of the protrusion is greater than or equal to 1.5 nm and less than or equal to 50 nm.

[0013] In one embodiment, the distance between two adjacent protrusions is less than or equal to 500 nm, preferably greater than or equal to 10 nm and less than or equal to 100 nm.

[0014] In one embodiment, the cleaning layer is made of an inorganic material, and the material of the cleaning layer does not include fluorine.

[0015] In one embodiment, the cleaning layer comprises at least one element selected from the group consisting of Ti, Zr, Nb, Si, Sb, Sn, Zn, In, Al, Ni, Cr, Mg, Mn, V, W, Hf, Ta, Mo, Ga, Y, Bi, Ta and rare earth elements, and preferably comprises at least one oxide or nitride selected from the group consisting of titanium, niobium, zinc, tin and silicon.

[0016] In one embodiment, after the head-up display glass is subjected to high-temperature molding processing at 500° C. to 700° C., the water contact angle between the surface of the cleaning layer and the stain is greater than or equal to 80°.

[0017] In one embodiment, the glass body comprises an inner glass plate, an outer glass plate and an adhesive layer, and along the thickness direction of the head-up display glass, the outer glass plate, the adhesive layer and the inner glass plate are sequentially stacked and connected, and the surface of the inner glass plate facing away from the adhesive layer is the inner surface of the glass body, and the surface of the outer glass plate facing away from the adhesive layer is the outer surface of the glass body;

[0018] The cleaning layer and the reflecting layer are disposed on the inner glass plate.

[0019] In one embodiment, the difference in refractive index between the outer glass plate and the bonding layer is less than or equal to 0.2, and the difference in refractive index between the inner glass plate and the bonding layer is less than or equal to 0.2.

[0020] In one embodiment, the reflective layer includes a barrier layer and a high- and low-refractive index stack. Along the thickness direction of the head-up display glass, the barrier layer and the high- and low-refractive index stack are sequentially stacked and connected to the inner surface of the glass body.

[0021] In one embodiment, the high-low refractive index stack includes at least one high refractive index material layer and at least one low refractive index material layer, and along the thickness direction of the reflective layer, the high refractive index material layer and the low refractive index material layer are sequentially stacked on the blocking layer.

[0022] In one embodiment, the refractive index of the high refractive index material layer is greater than or equal to 1.8, and the refractive index of the low refractive index material layer is less than 1.8; and the difference in refractive index between adjacent high refractive index material layers and low refractive index material layers is greater than or equal to 0.1.

[0023] In a second aspect, an embodiment of the present application provides a head-up display system. The head-up display system includes a projection device and the head-up display glass, wherein the projection device faces the head-up display glass and emits projection light to the head-up display glass.

[0024] In one embodiment, the projection light includes P polarized light;

[0025] When the projection light is incident on the head-up display glass at an incident angle of 65°, the projection light passes through the reflective layer and then is reflected by the inner surface of the glass body to form a display main image, and is reflected by the outer surface of the glass body to form a display secondary image. The ratio of the reflected light intensity between the display main image and the display secondary image is greater than 30, and the reflectivity of the reflective layer to P-polarized light in the projection light is greater than 18%.

[0026] In a third aspect, an embodiment of the present application provides a vehicle, wherein the vehicle comprises a vehicle body and the head-up display system, wherein the head-up display glass is installed on the vehicle body and divides the vehicle body into an interior of the vehicle body and an exterior of the vehicle body, and the projection device is installed on the interior of the vehicle body.

[0027] In the related art, the display glass is usually provided with a display layer on the surface facing the interior of the vehicle to realize the head-up display function. However, the display layer is easily stained, and the stains are not easy to wipe off. During the use of the display glass, if the stains are not wiped off, the head-up display effect will be affected, which may easily lead to safety hazards.

[0028] In the embodiment of the present application, the head-up display glass further includes a cleaning layer, which is arranged on the surface of the reflective layer facing the interior of the vehicle to separate the stain from the surface of the reflective layer, and the cleaning layer will not affect the head-up display performance of the reflective layer. The cleaning layer is composed of a plurality of protrusions. When the stain contacts the plurality of protrusions, the water contact angle between the stain and the plurality of protrusions is greater than the water contact angle between the stain and the reflective layer. Therefore, the adhesion between the stain and the plurality of protrusions decreases, and the stain is easy to wipe off, so that the cleaning layer has the effect of resisting stains and being easy to clean, and prevents the stain from staying on the surface of the head-up display glass and interfering with the sight of the people in the car, which is beneficial to improving the clarity of the head-up display glass, and further beneficial to improving the head-up display performance of the head-up display glass, and ensuring the safety of driving. In addition, in the present embodiment, the cleaning layer has the performance of high temperature processing resistance, and the water contact angle of the cleaning layer after high temperature treatment is greater than or equal to 80°, and still has excellent anti-stain and easy-to-clean performance, so that the cleaning layer, the reflective layer and the inner glass plate can be integrally processed and formed by high temperature treatment, which simplifies the preparation process of the head-up display glass, reduces energy consumption, and is beneficial to the production of the head-up display glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments or background technologies of the present application, the drawings required for use in the embodiments or background technologies of the present application will be described below.

[0030] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0031] Figure 2 A schematic structural diagram of a part of the structure where stains are present on the head-up display glass of a vehicle in the prior art;

[0032] Figure 3 for Figure 1 A schematic structural diagram of a portion of the structure where stains are present on the head-up display glass of a vehicle shown;

[0033] Figure 4 for Figure 3 A schematic cross-sectional view of a partial structure of a head-up display glass is shown;

[0034] Figure 5 for Figure 4 The structure schematic diagram of the head-up display glass under a scanning electron microscope is shown.

[0035] The nouns corresponding to the various figure marks in the figures are: vehicle 1000, head-up display system 100, head-up display glass 10, glass body 11, outer surface 111, inner surface 112, outer glass plate 12, first surface 121, second surface 122, inner glass plate 13, third surface 131, fourth surface 132, adhesive layer 14, reflective layer 15, first surface 151, second surface 152, cleaning layer 16, protrusion 161, tool body 200 display glass 300, body 310, outer surface 311, inner surface 312, display layer 320, stain 400, water contact angle α. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0037] In the embodiments of the present application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. And "multiple" in this application refers to two or more.

[0038] See also Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application.

[0039] The present application provides a vehicle 1000, which may be a vehicle, ship, or airplane with a head-up display function. The vehicle 1000 of the embodiment of the present application is described by taking a vehicle as an example. The vehicle may be, but is not limited to, a sedan, a multi-purpose vehicle (MPV), a sport utility vehicle (SUV), an off-road vehicle (ORV), a pickup truck, a van, a bus, a truck, and the like. In the specific implementation of the present application, the vehicle 1000 takes a sedan as an example.

[0040] For the convenience of description, in this application, the definition Figure 1The width direction of the vehicle 1000 is the X-axis direction, the length direction is the Y-axis direction, and the height direction is the Z-axis direction. The X-axis, Y-axis, and Z-axis directions are perpendicular to each other.

[0041] The directional terms such as "top", "bottom", "left", "right", "front" and "back" mentioned in the description of this application are described based on the orientation of the vehicle 1000 shown in the drawings of the specification, with the forward direction in the length direction of the vehicle 1000 being the positive direction of the Y-axis, the direction from the left to the right in the width direction of the vehicle 1000 being the positive direction of the X-axis, and the direction away from the ground in the height direction of the vehicle 1000 being the positive direction of the Z-axis.

[0042] The vehicle 1000 includes a head-up display system 100 and a tool body 200. The head-up display system 100 is installed on the tool body 200. The head-up display system 100 is used for the head-up display of the vehicle 1000. The head-up display system 100 includes a head-up display glass 10 and a projection device (not shown). The head-up display glass 10 is installed on the tool body 200, and the head-up display glass 10 divides the tool body 200 into the outside of the tool body 200 and the inside of the tool body 200. The projection device is installed inside the tool body 200, and the projection device faces the head-up display glass 10. The projection device is used to emit projection light (not shown) to the head-up display glass 10, and make the projection light incident on the head-up display glass 10 at an incident angle of 55° to 75°. The projection light through the head-up display glass 10 is reflected into the eyes of the people in the vehicle to form a head-up display image. The projection light includes P polarized light.

[0043] The head-up display glass 10 can be used as the front windshield, rear windshield, window glass, corner window glass or skylight glass of the vehicle 1000. In the specific implementation of the present application, the head-up display glass 10 is described below by taking the front windshield as an example.

[0044] See also Figure 2 , Figure 2 The present invention is a simplified structural diagram of a part of the structure in which stains are present on the head-up display glass of a vehicle in the prior art.

[0045] In the related art, the display glass 300 includes a body 310 and a display layer 320. The body 310 includes an outer surface 311 and an inner surface 312. The outer surface 311 and the inner surface 312 of the body 310 are arranged opposite to each other along the thickness direction of the body 310. The outer surface 311 of the body 310 faces the outside of the vehicle 1000. The inner surface 312 of the body 310 faces the inside of the vehicle 1000. Along the thickness direction of the display glass 300, the display layer 320 is laminated and connected to the inner surface 312 of the body 310. The display layer 320 is a smooth film layer. The display layer 320 is used to improve the reflectivity of P-polarized light in the projection light to meet the head-up display performance of the display glass.

[0046] When the stain 400 adheres to the side of the display glass 300 facing the inside of the vehicle 1000, the stain 400 directly adheres to the surface of the display layer 320 facing away from the body 310. Since the display layer 320 is a smooth film layer, the stain 400 is in a flat state on the surface of the display layer 320. According to the GB / T 24368-2009 test method, it is measured that the water contact angle α between the surface of the independent individual stain 400 (a single water droplet or a dot structure) and the surface of the display layer 320 is relatively small, and the adhesion of the stain 400 to the surface of the display layer 320 is large, making the stain 400 difficult to wipe off, thereby affecting the anti-stain ability of the head-up display glass 10. The stain 400 may be fingerprints, water, oil, etc. The anti-stain ability may be expressed as anti-fingerprint ability, hydrophobic ability, and oleophobic ability, etc.

[0047] In some related technologies, the optical properties of the display glass 300 are designed to further reduce the visibility of the stains 400 on the display glass 300. However, the stains 400 on the display glass 300 still exist, which does not fundamentally solve the problem that the stains 400 on the display glass 300 are difficult to wipe off.

[0048] The following will describe how this application solves the above problems.

[0049] See also Figure 3 , Figure 3 for Figure 1 The structure schematic diagram of the partial structure of the head-up display glass of a vehicle with stains is shown.

[0050] In this embodiment, unlike the display glass 300 in the prior art, the head-up display glass 10 in this embodiment includes a glass body 11, a reflective layer 15 and a cleaning layer 16. The glass body 11 includes an outer surface 111 and an inner surface 112. The outer surface 111 and the inner surface 112 of the glass body 11 are arranged opposite to each other along the thickness direction of the glass body 11. The outer surface 111 of the glass body 11 faces the outside of the vehicle 1000. The inner surface 112 of the glass body 11 faces the inside of the vehicle 1000. Along the thickness direction of the head-up display glass 10, the reflective layer 15 is laminated and connected to the inner surface 112 of the glass body 11. The cleaning layer 16 is laminated and connected to the surface of the reflective layer 15 facing away from the glass body 11. The cleaning layer 16 is an uneven film layer. Along the thickness direction of the head-up display glass 10, the projection of the reflective layer 15 is completely located within the projection of the glass body 11. Exemplarily, the area of ​​the cleaning layer 16 is equal to the area of ​​the reflective layer 15. The area of ​​the reflective layer 15 is equal to the area of ​​the inner surface 112 of the glass body 11 .

[0051] The reflective layer 15 is used to improve the reflectivity of the P-polarized light in the projection light. When the projection device emits projection light to the head-up display glass 10, the projection light is incident on the inner surface 112 and the outer surface 111 of the glass body 11 and then reflected to form a main display image and a secondary display image, respectively. The ratio of the reflected light intensity between the main display image and the secondary display image is used to measure the clarity of the head-up display image observed by the occupants of the vehicle. The larger the ratio of the reflected light intensity between the main display image and the secondary display image, the clearer the main display image is, and the easier it is to be observed by the occupants of the vehicle, while the secondary display image is less likely to be observed.

[0052] In this embodiment, the projection light is incident on the head-up display glass 10 at an incident angle of 65°. The reflectivity of the reflective layer 15 to the P polarized light in the projection light incident at an incident angle of 65° is greater than 18%. The projection light passing through the reflective layer 15 is then reflected by the inner surface 112 and the outer surface 111 of the glass body 11 to form a display main image and a display secondary image. The ratio of the reflected light intensity between the display main image and the display secondary image is greater than 30, which effectively reduces the possibility of double images formed after the projection light is reflected by the head-up display glass 10, and improves the display quality of the head-up display glass 10.

[0053] In this embodiment, Figure 3As shown, when the stain 400 adheres to the cleaning layer 16 of the head-up display glass 10 facing the interior of the vehicle 1000, the cleaning layer 16 can separate the stain 400 from the reflective layer 15. The stain 400 is in a flat state on the surface of the cleaning layer 16. According to the GB / T 24368-2009 test method, the water contact angle α between the surface of the cleaning layer 16 and the surface of the independent individual of the stain 400 (a single water droplet or a dot structure) is measured to be greater than or equal to 80 degrees, and the adhesion of the stain 400 to the surface of the cleaning layer 16 is small, so that the stain 400 is easy to wipe off, thereby improving the anti-stain ability of the head-up display glass 10.

[0054] The water contact angle α is the angle between the surface of the stain 400 and the surface of the cleaning layer 16 at the junction of the stain 400 and the cleaning layer 16. The water contact angle α can vary from 0° to 180°. The larger the water contact angle α, the more obvious the hydrophobic effect. If the water contact angle α between the stain 400 and the cleaning layer 16 is larger, the adhesion of the stain 400 to the surface of the reflective layer 15 is smaller, making it easier to wipe off the stain 400, and the head-up display glass 10 has better anti-stain and easy-to-clean capabilities.

[0055] See also Figure 4 and Figure 5 , Figure 4 for Figure 3 A schematic cross-sectional view of a partial structure of the head-up display glass shown in FIG. Figure 5 for Figure 4 The structure schematic diagram of the head-up display glass under a scanning electron microscope is shown.

[0056] In this embodiment, Figure 4 As shown, the glass body 11 is a laminated glass structure. Of course, in some embodiments, the glass body 11 can also be a single-layer glass structure, that is, it only includes one glass plate.

[0057] The glass body 11 includes an inner glass plate 13, an outer glass plate 12, and an adhesive layer 14. The outer glass plate 12, the adhesive layer 14, and the inner glass plate 13 are sequentially stacked and connected along the thickness direction of the glass body 11. When the head-up display glass 10 is installed on the vehicle body 200, the outer glass plate 12 faces the outside of the vehicle 1000, and the inner glass plate 13 faces the inside of the vehicle 1000. The adhesive layer 14 is connected to the inner glass plate 13 and the outer glass plate 12.

[0058] The outer glass plate 12 includes a first surface 121 and a second surface 122. The first surface 121 and the second surface 122 are arranged opposite to each other along the thickness direction of the outer glass plate 12. When the head-up display glass 10 is installed to the tool body 200, the first surface 121 of the outer glass plate 12 faces the outside of the vehicle 1000, serving as the outer surface 111 of the outer glass plate 12, and serving as the outer surface 111 of the glass body 11. The second surface 122 of the outer glass plate 12 faces the bonding layer 14, serving as the inner surface 112 of the outer glass plate 12. In this embodiment, the outer glass plate 12 can be made of, but not limited to, silicate glass, borate glass, phosphate glass, etc. Preferably, the outer glass plate 12 is made of soda-lime silicate glass. The thickness of the outer glass plate 12 is greater than or equal to 1.6 mm and less than or equal to 5.0 mm.

[0059] The inner glass plate 13 includes a third surface 131 and a fourth surface 132. The third surface 131 and the fourth surface 132 are arranged opposite to each other along the thickness direction of the inner glass plate 13. When the head-up display glass 10 is installed to the tool body 200, the third surface 131 of the inner glass plate 13 faces the adhesive layer 14, serving as the outer surface 111 of the inner glass plate 13. The fourth surface 132 of the inner glass plate 13 faces the interior of the vehicle 1000, serving as the inner surface 112 of the inner glass plate 13, and serving as the inner surface 112 of the glass body 11. In this embodiment, the inner glass plate 13 may be made of, but not limited to, silicate glass, borate glass, phosphate glass, etc. Preferably, the inner glass plate 13 is made of soda-lime silicate glass. The thickness of the inner glass plate 13 is greater than or equal to 0.7 mm and less than or equal to 5.0 mm.

[0060] The adhesive layer 14 is used to bond and fix the outer glass plate 12 and the inner glass plate 13. In this embodiment, the adhesive layer 14 can be, but is not limited to, a thermoplastic polymer film. The material of the thermoplastic polymer film can be selected from at least one of polyvinyl butyral (PVB), polyurethane (PU), ethylene-vinyl acetate copolymer (EVA) and ionomer (SGP). The thickness of the adhesive layer 14 is greater than or equal to 0.2 mm and less than or equal to 2.0 mm.

[0061] In this embodiment, the adhesive layer 14 is connected to the second surface 122 of the outer glass plate 12 and the third surface 131 of the inner glass plate 13 to bond the outer glass plate 12 and the inner glass plate 13 together to form a laminated glass structure, thereby improving the structural strength of the glass body 11 and preventing glass shards from splashing and scratching the driver or passengers in the car after the outer glass plate 12 and the inner glass plate 13 are broken, so that the head-up display glass 10 meets the safety standards and regulatory requirements of more scenarios.

[0062] The difference in refractive index between the outer glass plate 12 and the bonding layer 14 is less than or equal to 0.2, and the difference in refractive index between the inner glass plate 13 and the bonding layer 14 is less than or equal to 0.2. Preferably, the difference in refractive index between the outer glass plate 12 and the bonding layer 14 is less than or equal to 0.1, and the difference in refractive index between the inner glass plate 13 and the bonding layer 14 is less than or equal to 0.1. It can be understood that the smaller the difference in refractive index between the outer glass plate 12 and the bonding layer, and between the inner glass plate 13 and the bonding layer 14, the smaller the reflected light intensity of the display secondary image formed by the reflection of the projection light after being incident on the glass body 11, the more conducive to improving the ratio of the reflected light intensity of the display image and the display secondary image, thereby being more conducive to eliminating ghosting and improving the head-up display quality of the head-up display glass 10.

[0063] The reflective layer 15 includes a first surface 151 and a second surface 152. The first surface 151 and the second surface 152 are arranged opposite to each other along the thickness direction of the reflective layer 15. In this embodiment, the reflective layer 15 can be made of but not limited to a transparent nanofilm. The transparent nanofilm includes a barrier layer and a high and low refractive index stack. Along the thickness direction of the head-up display glass 10, the barrier layer is laminated and connected to the inner surface 112 of the glass body 11. The barrier layer is not only used to block the penetration of the alkali metal in the glass body 11 toward the direction of the high and low refractive index stack, thereby improving the display quality of the reflective layer 15, but also the barrier layer can improve the flatness of the surface of the glass body 11. The high and low refractive index stack is laminated and connected to the surface of the barrier layer facing away from the glass body 11. The high and low refractive index stack is used to improve the reflection of P polarized light in the projection light. In this embodiment, when the projection light is incident on the reflective layer 15 at an incident angle of 65°, the reflectivity of the high and low refractive index stack for P polarized light in the projection light is greater than 18%.

[0064] The material of the barrier layer may include one or a mixture of oxides and oxynitrides of chromium (Cr), zirconium (Zr), niobium (Nb), silicon (Si), antimony (Sb), tin (Sn), zinc (Zn), titanium (Ti), etc. Preferably, the material of the barrier layer includes oxides of Zn and Sn, and / or nitrides of Si, such as zinc tin oxide (ZnSnO x ), Silicon Nitride (SiN x ) etc. More preferably, the mass fraction of Zn in the material of the barrier layer is between 15% and 30% (including the endpoints 15% and 30%). The thickness of the barrier layer is greater than or equal to 5nm and less than or equal to 50nm.

[0065] The high-low refractive index stack includes at least one stacked structure, and the stacked structure includes a high refractive index material layer and a low refractive index material layer. That is, the high-low refractive index stack includes at least one high refractive index material layer and at least one low refractive index material layer. When the high-low refractive index stack includes one stacked structure, the high refractive index material layer is stacked and connected to the inner surface 112 of the barrier layer facing away from the glass body 11, and the low refractive index material layer is stacked and connected to the surface of the high refractive index material layer facing away from the barrier layer. When the high-low refractive index stack includes multiple stacked structures, multiple high refractive index material layers and multiple low refractive index material layers are alternately stacked. In the stacked structure, the refractive index of the high refractive index material layer is greater than or equal to 1.8, and the refractive index of the low refractive index material layer is less than 1.8. The difference in refractive index between adjacent high refractive index material layers and low refractive index material layers is greater than or equal to 0.1, so as to better achieve that the optical properties, mechanical properties and appearance color of the reflective layer 15 meet the comprehensive requirements of the window glass for the vehicle 1000.

[0066] In the stacked structure, the material of the high refractive index material layer may include at least one element selected from zirconium (Zr), niobium (Nb), silicon (Si), antimony (Sb), tin (Sn), zinc (Zn), indium (In), aluminum (Al), nickel (Ni), chromium (Cr), magnesium (Mg), manganese (Mn), vanadium (V), tungsten (W), hafnium (Hf), tantalum (Ta), molybdenum (Mo), gallium (Ga), yttrium (Y), bismuth (Bi), titanium (Ti) and rare earth elements. Preferably, the high refractive index material layer includes at least one of metal Ti, Ti oxide, Ti nitride, Ti oxynitride, Si oxide and Si oxynitride, and specifically includes titanium oxide (TiO x ), Silicon Nitride (SiN x ) etc. More preferably, the mass fraction of Ti in the material of the high refractive index material layer is between 30% and 80% (including the endpoints 30% and 80%). Further preferably, the mass fraction of Ti in the material of the high refractive index material layer is between 55% and 65% (including the endpoints 55% and 65%). The thickness of the high refractive index material layer is greater than 10 mm and less than or equal to 150 mm.

[0067] The material of the low refractive index material layer includes at least one element selected from zirconium (Zr), niobium (Nb), silicon (Si), antimony (Sb), tin (Sn), zinc (Zn), indium (In), aluminum (Al), nickel (Ni), chromium (Cr), magnesium (Mg), manganese (Mn), vanadium (V), tungsten (W), hafnium (Hf), tantalum (Ta), molybdenum (Mo), gallium (Ga), yttrium (Y), bismuth (Bi), titanium (Ti) and rare earth elements. Preferably, the low refractive index material layer includes at least one of Si oxide, Si oxynitride, Si oxycarbon, Al oxide and a mixture of Al and Si, such as silicon oxide (SiO2), silicon aluminum oxide (SiAlO x ), aluminum oxide (Al2O3), etc. More preferably, the mass fraction of Si in the material of the low refractive index material layer is between 30% and 80% (including the endpoints 30% and 80%). Further preferably, the mass fraction of Si in the material of the low refractive index material layer is between 40% and 60% (including the endpoints 40% and 60%). The thickness of the low refractive index material layer is greater than or equal to 10nm and less than or equal to 200nm.

[0068] The second surface 152 of the reflective layer 15 faces the fourth surface 132 of the inner glass plate 13 and is connected to the fourth surface 132. When the projection device emits projection light to the head-up display glass 10 at an incident angle of 65°, after the projection light passes through the reflective layer 15, the reflectivity of the reflective layer 15 to the P-polarized light in the projection light incident at an incident angle of 65° is greater than 18%. The projection light passing through the reflective layer 15 is reflected on the fourth surface 132 of the inner glass plate 13 to form a display main image, and is reflected on the first surface 121 of the outer glass plate 12 to form a display secondary image. Under the reflection effect of the reflective layer 15 on the P-polarized light of the projection light, the ratio of the reflected light intensity between the display main image and the display secondary image is greater than 30, which effectively weakens the double image formed after the projection light is reflected by the head-up display glass 10, and improves the display quality of the head-up display glass 10.

[0069] In this embodiment, the cleaning layer 16 is formed by a cleaning material layer subjected to high temperature heat treatment, and can be adapted to high temperature processing technology. The cleaning layer 16 is a micro-convex structure, which includes a plurality of protrusions 161. Along the surface of the head-up display glass 10, the plurality of protrusions 161 are arranged at intervals from each other. The protrusions 161 contact the stain 400 and separate the stain 400 from the reflective layer 15.

[0070] In this embodiment, the protrusion 161 is generally an arc-shaped protrusion. The radius of the plurality of protrusions 161 is greater than or equal to 1.5 nm and less than or equal to 50 nm, so as to avoid the protrusion 161 being too large and increasing the contact area between the protrusion 161 and the stain 400, thereby reducing the adhesion between the stain 400 and the surface of the protrusion 161, making it easy to wipe off the stain 400, and improving the anti-stain and easy-to-clean capabilities of the head-up display glass 10. At the same time, it also avoids the protrusion 161 being too small and increasing the difficulty of the molding process of the protrusion 161, reducing the production cost of the head-up display glass 10, and improving the cost performance of the head-up display glass 10.

[0071] In this embodiment, the height H of the protrusion 161 is greater than or equal to 1 nm and less than or equal to 50 nm. Preferably, the height H of the protrusion 161 is greater than or equal to 5 nm and less than or equal to 15 nm. The height H of the protrusion 161 is the straight-line distance from the arc-shaped top of the protrusion 161 to the bottom of the protrusion 161. In other words, the height H of the protrusion 161 is the thickness of the cleaning layer 16. The thickness of the cleaning layer 16 is greater than or equal to 1 nm and less than or equal to 50 nm. Preferably, the thickness of the cleaning layer 16 is greater than or equal to 5 nm and less than or equal to 15 nm, so as not to interfere with the projection light through the reflective layer 15, so that the various optical properties of the reflective layer 15, such as color and reflectivity, are guaranteed.

[0072] In this embodiment, the distance between two adjacent protrusions 161 is less than or equal to 500 nm. Preferably, the distance between two adjacent protrusions 161 is greater than or equal to 10 nm and less than or equal to 100 nm. If the distance between two adjacent protrusions 161 is greater than 500 nm, it is easy for the stain 400 to penetrate into the gap between the two adjacent protrusions 161 and contact the reflective layer 15, so that the adhesion between the stain 400 and the surface of the head-up display glass 10 increases, reducing the anti-staining ability of the head-up display glass 10.

[0073] Of course, in some embodiments, under different materials and molding processes, the protrusions 161 may also be in the shape of aggregated particles, polygonal crystals, etc. to varying degrees. For example, the protrusions 161 may be formed by a plurality of spheres embracing each other. This application does not limit this.

[0074] In this embodiment, the material of the cleaning layer 16 includes at least one element selected from zirconium (Zr), niobium (Nb), silicon (Si), antimony (Sb), tin (Sn), zinc (Zn), indium (In), aluminum (Al), nickel (Ni), chromium (Cr), magnesium (Mg), manganese (Mn), vanadium (V), tungsten (W), hafnium (Hf), tantalum (Ta), molybdenum (Mo), gallium (Ga), yttrium (Y), bismuth (Bi), titanium (Ti) and rare earth elements. Preferably, the material of the cleaning layer 16 includes at least one oxide or nitride selected from Ti, Nb, Si and Sn.

[0075] In addition, in some related technologies, materials containing fluoride are often used to make the anti-fouling film layer of the display glass 300. However, fluorine is a harmful substance that easily causes the greenhouse effect. On March 11, 2024, the European Union launched new regulations on the import of fluorinated greenhouse gases and ozone-depleting substances, and completely banned the import of some fluorine-containing substances. Therefore, the display glass 300 containing fluoride is not accepted by customers and the market, resulting in restrictions on the export of the vehicle 1000.

[0076] In the embodiment of the present application, the material of the cleaning layer 16 does not include the fluorine (F) element, circumventing the EU ban on fluorides and complying with mainstream environmental values, so that the cleaning layer 16 can be widely used in the head-up display glass 10 of the vehicle 1000, thereby enhancing the market competitiveness of the vehicle 1000.

[0077] The cleaning layer 16 is connected to the first surface 151 of the reflective layer 15. That is, a plurality of protrusions 161 are formed on the first surface 151 of the reflective layer 15. Figure 5 As shown, a plurality of protrusions 161 are evenly distributed on the first surface 151 of the reflective layer 15 to effectively block the stains 400 .

[0078] In the embodiment of the present application, the preparation process of the head-up display glass 10 is as follows:

[0079] First, a white glass is used as a substrate, and the white glass is cut, edged, washed and dried to form a glass plate.

[0080] Then, a magnetron sputtering coating line is used to deposit on one surface of the glass plate to form a reflective layer 15 .

[0081] Then, the cleaning material is deposited on the first surface 151 of the reflective layer 15 in a manner of depositing atoms to form a cleaning material layer. The cleaning material layer is used to form a cleaning layer, and the material of the cleaning material layer is the same as that of the cleaning layer 16.

[0082] Then, the glass plate is subjected to high temperature forming processing at 500°C to 700°C, and the glass plate forms the inner glass plate 13. During the high temperature treatment, the cleaning material layer is agglomerated due to the change in surface tension to form a cleaning layer 16. The cleaning layer 16 includes a plurality of protrusions 161. The plurality of protrusions 161 are fixedly connected to the first surface 151 of the reflective layer 15. Through proper process control, the plurality of protrusions 161 are evenly distributed on the first surface 151 of the reflective layer 15 to separate the stain 400 from the first surface 151 of the reflective layer 15, so as to achieve the effect of anti-stain and easy cleaning.

[0083] In this embodiment, the cleaning material layer is made of inorganic materials, which have the ability to withstand high temperature processing. After the cleaning material layer is processed by high temperature molding, the water contact angle α of the surface of the formed cleaning layer 16 is greater than or equal to 80°, and has good hydrophobic properties. The preparation process of the head-up display glass 10 can form the cleaning layer 16 under the requirement of high temperature molding of the inner glass plate 13 itself, which not only makes the cleaning layer 16 still have good hydrophobic properties after high temperature, but also saves the process steps of the head-up display glass 10, which is conducive to the production of the head-up display glass 10 and reduces energy consumption.

[0084] Then, a soda-lime silicate glass is used as a matching sheet, and the soda-lime silicate glass is cut, edged, washed and dried, and then subjected to a high-temperature forming process at 500° C. to 700° C. to form an outer glass plate 12 .

[0085] Finally, a bonding layer 14 is sandwiched between the outer glass plate 12 and the inner glass plate 13 , and the bonding layer 14 , the outer glass plate 12 , and the inner glass plate 13 are laminated under high pressure in an autoclave to form the head-up display glass 10 of the embodiment of the present application.

[0086] Comparative Examples 1-3 and Examples 1-3

[0087] This application is Figure 4 Taking the head-up display glass 10 as an example, the reflective layer 15 and the cleaning layer 16 with different thicknesses or made of different materials are selected for testing. The projection device emits projection light at an incident angle of 65° to the head-up display glass 10, and the reflectivity R of the first surface 151 of the inner glass plate 13 to the P polarized light in the projection light under different conditions is measured by a spectrophotometer. P , the reflection coefficient R of the first surface 151 of the outer glass plate 12 F1 , the transmittance T of the P polarized light in the projection light through the head-up display glass 10 P , and according to ISO9050 standard, substitute it into the following formula to calculate,

[0088]

[0089] The corresponding ratio C of the reflected light intensity between the displayed main image and the displayed secondary image is obtained. R And it is included in Table 1. The greater the reflectivity of P polarized light, the higher the utilization rate of the head-up display glass 10 for the projection light. In addition, the water contact angle α on the surface of the cleaning layer 16 under different conditions is measured by the GB / T 24368-2009 test. The larger the water contact angle α, the more obvious the hydrophobic property of the cleaning layer 16, the less likely the stain 400 is to adhere to the surface of the head-up display glass 10, and the easier it is to clean the stain 400 adhered to the head-up display glass 10. The following determines the anti-stain and easy-to-clean performance of the cleaning layer 16 by determining the size of the water contact angle α.

[0090] Among them, the thickness of the inner glass plate 13 in Comparative Example 1-3 and Example 1-3 is 1.6 mm, the thickness of the outer glass plate 12 is 2.1 mm, and the thickness of the adhesive layer 14 is 0.76 mm.

[0091] The reflective layer 15 in Comparative Example 1 is laminated and connected to the fourth surface 132 of the inner glass plate 13. The reflective layer 15 includes a barrier layer and two high and low refractive index laminates. The barrier layer is made of TiO x , with a thickness of 5.0nm. The materials of the high and low refractive index stacks are SiN, SiO2, TiO x and SiO2, the thicknesses of the high and low refractive index stacks are 10nm, 10nm, 50nm, and 108nm, respectively.

[0092] Example 1 Based on the structure of Comparative Example 1, a cleaning layer 16 is laminated on the side of the reflective layer 15 facing away from the inner glass plate 13. The material of the cleaning layer 16 is NbO, and the thickness is 9nm. x The refractive index is 2.58.

[0093] The reflective layer 15 in Comparative Example 2 includes a barrier layer and a high-low refractive index stack. The barrier layer is made of ZnSnO x The materials of the high and low refractive index stacks are TiO2 and SiO2, respectively, and the thicknesses of the high and low refractive index stacks are 43nm and 100nm, respectively.

[0094] Embodiment 2 Based on the structure of Comparative Example 2, a cleaning layer 16 is laminated and connected to the side of the reflective layer 15 facing away from the inner glass plate 13. The material of the cleaning layer 16 is TiO2, and the thickness is 6nm.

[0095] The reflective layer 15 in Comparative Example 3 includes a barrier layer and a high-low refractive index stack. The barrier layer is made of SiN with a thickness of 40 nm. The materials of the high-low refractive index stack are TiO x and SiO2, the thickness of the high and low refractive index stacks are 50nm and 100nm respectively.

[0096] Example 3 Based on the structure of Comparative Example 3, a cleaning layer 16 is laminated on the side of the reflective layer 15 facing away from the inner glass plate 13. The material of the cleaning layer 16 is NbO, and the thickness is 12nm. x The refractive index is 2.62.

[0097] In summary, the head-up display glasses 10 of comparative examples 1-3 do not have the cleaning layer 16 , while the head-up display glasses 10 of embodiments 1-3 have the cleaning layer 16 .

[0098] Table 1 Test results of head-up display glass 10 of comparative examples 1-3 and embodiments 1-3

[0099] Water contact angle α <![CDATA[R P (65°)]]> <![CDATA[C R ]]> Comparative Example 1 31.8° 22.8％ 39 Example 1 83.5° 23.1％ 39 Comparative Example 2 34.3° 22.6％ 37 Example 2 89.4° 22.7％ 39 Comparative Example 3 29.6° 21.0％ 38 Example 3 80.1° 20.6％ 38

[0100] From Table 1, we can see that:

[0101] Comparative Example 1 is compared with Example 1, Comparative Example 2 is compared with Example 2, and Comparative Example 3 is compared with Example 3. When the structures of the inner glass plate 13 and the reflective layer 15 are the same, the water contact angle α of the surface of the head-up display glass 10 with the cleaning layer 16 is greater than the water contact angle α of the surface of the head-up display glass 10 without the cleaning layer 16. Compared with the head-up display glass 10 without the cleaning layer 16, the head-up display glass 10 with the cleaning layer 16 has a significantly improved hydrophobic effect, can effectively reduce the adhesion between the stain 400 and the surface of the head-up display glass 10, so that the stain 400 is easy to wipe off, thereby having good anti-stain and easy-to-clean performance.

[0102] In addition, the reflectivity R of the first surface 151 of the inner glass plate 13 to the P polarized light in the projection light in the comparative examples 1-3 and the embodiments 1-3 is P and the corresponding ratio of the reflected light intensity between the primary image and the secondary image C R The results show that the reflectivity R of the head-up display glass 10 to the P polarized light in the projection light is P The ratio of the reflected light intensity between the primary image and the secondary image is C R There is almost no change. That is, the cleaning layer 16 has basically no effect on the head-up display performance of the head-up display glass 10. The head-up display glass 10 provided in the embodiment of the present application has good head-up display performance and also has the performance of anti-stain and easy cleaning, so as to effectively solve the problem that the reflective layer 15 is easily contaminated by the stain 400 and the stain 400 is difficult to wipe off.

[0103] In the related art, the display glass 300 is usually provided with a display layer 320 on the surface facing the inside of the vehicle 1000 to realize the head-up display function. However, the display layer 320 is easily attached with stains 400, and the stains 400 are not easy to wipe off. During the use of the display glass 300, if the stains 400 are not wiped off, the head-up display effect will be affected, which may easily cause safety hazards.

[0104] In the embodiment of the present application, the head-up display glass 10 further includes a cleaning layer 16, which is disposed on the surface of the reflective layer 15 facing the interior of the vehicle 1000 to separate the stain 400 from the surface of the reflective layer 15, and the cleaning layer 16 will not affect the head-up display performance of the reflective layer 15. The cleaning layer 16 is composed of a plurality of protrusions 161. When the stain 400 contacts the plurality of protrusions 161, the water contact angle α between the stain 400 and the plurality of protrusions 161 is greater than the water contact angle α between the stain 400 and the reflective layer 15, so that the adhesion between the stain 400 and the plurality of protrusions 161 decreases, and the stain 400 is easy to wipe off, so that the cleaning layer 16 has the effect of anti-stain and easy cleaning, and prevents the stain 400 from staying on the surface of the head-up display glass 10 and interfering with the sight of the occupants of the vehicle, which is beneficial to improving the clarity of the head-up display glass 10, and further beneficial to improving the head-up display performance of the head-up display glass 10, and ensuring the safety of driving. In addition, in the present embodiment, the cleaning layer 16 has the performance of being resistant to high temperature processing. The water contact angle α of the cleaning layer 16 after high temperature treatment is greater than or equal to 80°, and the cleaning layer 16 still has excellent anti-fouling and easy-to-clean performance. Therefore, the cleaning layer 16, the reflective layer 15 and the inner glass plate 13 can be integrally processed and formed through high temperature treatment, which simplifies the preparation process of the head-up display glass 10, reduces energy consumption, and is beneficial to the production of the head-up display glass 10.

[0105] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A head-up display glass, characterized in that: The head-up display glass comprises: A glass body, wherein the glass body comprises an inner surface and an outer surface, wherein the outer surface and the inner surface are arranged opposite to each other along a thickness direction of the glass body; A reflective layer, along the thickness direction of the head-up display glass, the reflective layer is laminated and connected to the inner surface of the glass body, the reflective layer includes a first surface and a second surface, the first surface and the second surface are arranged opposite to each other along the thickness direction of the reflective layer, and the second surface is connected to the inner surface; and a cleaning layer, along the thickness direction of the head-up display glass, the cleaning layer being laminated and connected to the first surface of the reflective layer; Along the thickness direction of the head-up display glass, the projection of the reflective layer is completely located within the projection of the glass body; The water contact angle between the surface of the cleaning layer and the dirt is greater than or equal to 80°.

2. The head-up display glass according to claim 1, characterized in that: The cleaning layer has a thickness greater than or equal to 1 nm and less than or equal to 50 nm.

3. The head-up display glass according to claim 2, characterized in that: The cleaning layer includes a plurality of protrusions, the plurality of protrusions are formed on the first surface of the reflective layer, and the plurality of protrusions are arranged at intervals from each other.

4. The head-up display glass according to claim 3, characterized in that: The protrusion is an arc-shaped protrusion, and the radius of the protrusion is greater than or equal to 1.5 nm and less than or equal to 50 nm.

5. The head-up display glass according to claim 3, characterized in that: The distance between two adjacent protrusions is less than or equal to 500 nm, preferably greater than or equal to 10 nm and less than or equal to 100 nm.

6. The head-up display glass according to any one of claims 1 to 5, characterized in that: The cleaning layer is made of an inorganic material, and the material of the cleaning layer does not include fluorine element.

7. The head-up display glass according to claim 6, characterized in that: The cleaning layer contains at least one element selected from the group consisting of Ti, Zr, Nb, Si, Sb, Sn, Zn, In, Al, Ni, Cr, Mg, Mn, V, W, Hf, Ta, Mo, Ga, Y, Bi, Ta and rare earth elements, and preferably contains at least one oxide or nitride selected from the group consisting of titanium, niobium, zinc, tin and silicon.

8. The head-up display glass according to claim 6, characterized in that: After the head-up display glass is processed by high-temperature molding at 500° C. to 700° C., the water contact angle between the surface of the cleaning layer and the stain is greater than or equal to 80°.

9. The head-up display glass according to claim 1, characterized in that: The glass body comprises an inner glass plate, an outer glass plate and an adhesive layer. Along the thickness direction of the head-up display glass, the outer glass plate, the adhesive layer and the inner glass plate are sequentially stacked and connected. The surface of the inner glass plate facing away from the adhesive layer is the inner surface of the glass body, and the surface of the outer glass plate facing away from the adhesive layer is the outer surface of the glass body. The cleaning layer and the reflecting layer are disposed on the inner glass plate.

10. The head-up display glass according to claim 9, characterized in that: The difference in refractive index between the outer glass plate and the bonding layer is less than or equal to 0.2, and the difference in refractive index between the inner glass plate and the bonding layer is less than or equal to 0.

2.

11. The head-up display glass according to claim 1, characterized in that: The reflective layer includes a barrier layer and a high- and low-refractive index stack. Along the thickness direction of the head-up display glass, the barrier layer and the high- and low-refractive index stack are sequentially stacked and connected to the inner surface of the glass body.

12. The head-up display glass according to claim 11, characterized in that: The high-low refractive index stack includes at least one high-refractive index material layer and at least one low-refractive index material layer. Along the thickness direction of the reflective layer, the high-refractive index material layer and the low-refractive index material layer are sequentially stacked on the barrier layer.

13. The head-up display glass according to claim 12, characterized in that: The refractive index of the high refractive index material layer is greater than or equal to 1.8, and the refractive index of the low refractive index material layer is less than 1.8; and the difference in refractive index between adjacent high refractive index material layers and low refractive index material layers is greater than or equal to 0.

1.

14. A head-up display system, characterized in that: The head-up display system includes a projection device and the head-up display glass according to any one of claims 1 to 13, wherein the projection device faces the head-up display glass and emits projection light to the head-up display glass.

15. The head-up display system according to claim 14, characterized in that: The projection light includes P polarized light; When the projection light is incident on the head-up display glass at an incident angle of 65°, the projection light passes through the reflective layer and then is reflected by the inner surface of the glass body to form a display main image, and is reflected by the outer surface of the glass body to form a display secondary image. The ratio of the reflected light intensity between the display main image and the display secondary image is greater than 30, and the reflectivity of the reflective layer to P-polarized light in the projection light is greater than 18%.

16. A means of transport, characterized in that: The vehicle includes a vehicle body and a head-up display system as described in claim 14 or 15, the head-up display glass is installed on the vehicle body and divides the vehicle body into an interior of the vehicle body and an exterior of the vehicle body, and the projection device is installed inside the vehicle body.

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