Head-up display window and vehicle

Abstract

The application discloses a head-up display vehicle window, which comprises a window glass and a projection device (1). The window glass comprises a glass layer (2) and a transparent nanometer film (3). The transparent nanometer film (3) is arranged on the glass layer (2). The projection device (1) is used for generating projection light (11) and projecting the projection light (11) on the window glass to form a projection image. The projection light (11) comprises at least 70% of P-polarized light. The transparent nanometer film (3) can reflect at least part of the incident P-polarized light. The reflectivity of the window glass to the P-polarized light is greater than or equal to 5%. The visible light transmittance of the window glass is greater than or equal to 70%, and the total solar energy transmittance of the window glass is less than or equal to 50%. A vehicle comprising the head-up display vehicle window is also disclosed. The window glass has good heat insulation effect and meets the use requirement of thermal comfort.

Description

TECHNICAL FIELD

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

[0002] The head-up display function (HUD) is applied more and more widely on automobiles, and the most widely used technology in the prior art is to use a wedge-shaped PVB film to realize a head-up display image without ghosting, such as Chinese patent CN101038349A and US2002172804A1. However, these technical solutions have the following disadvantages: a special specification PVB film needs to be used, the price of which is 7-10 times that of an ordinary PVB film, and the process is difficult, resulting in high material and process costs; moreover, the applicability is poor, different vehicle models need to be specially designed with different PVB films; in addition, the heat insulation effect is poor, which cannot meet the use demand of thermal comfort. SUMMARY

[0003] The present application aims to provide a head-up display window and a vehicle to solve the above technical problems.

[0004] The present application provides a head-up display window, comprising a window glass and a projection device, the window glass comprising a glass layer and a transparent nanometer film, the transparent nanometer film being arranged on the glass layer, the projection device being used to generate projection light and project the projection light onto the window glass to form a projection image, the projection light comprising at least 70% P-polarized light, the transparent nanometer film being capable of reflecting at least part of the incident P-polarized light, the projection light being projected onto the window glass at an incident angle of 40°-75°, the reflectivity of the window glass to the P-polarized light being greater than or equal to 10%, the visible light transmittance of the window glass being greater than or equal to 70%, and the total solar energy transmittance of the window glass being less than or equal to 50%.

[0005] The thickness of the transparent nanometer film is 100nm-500nm.

[0006] The area ratio of the transparent nanometer film on the glass layer is greater than or equal to 70%.

[0007] The glass layer is a single piece of strengthened glass, the single piece of strengthened glass has an outer surface facing outward and an inner surface facing inward, and the transparent nanometer film is arranged on the inner surface.

[0008] The glass layer is a laminated glass, and the glass layer comprises a first glass sublayer, a second polymer sublayer, and a second glass sublayer, the first glass sublayer, the second polymer sublayer, and the second glass sublayer are sequentially arranged to form the laminated glass; the first glass sublayer has opposite first and second surfaces, the second glass sublayer has opposite third and fourth surfaces, and the second polymer sublayer is arranged close to the second surface and the third surface; the transparent nanofilm is arranged on the second surface, at least one surface of the second polymer sublayer, the third surface, or the fourth surface.

[0009] The transparent nanofilm comprises at least five dielectric layers and at least four conductive layers, and the at least five dielectric layers and the at least four conductive layers are alternately and laminatedly arranged.

[0010] The total thickness of the at least four conductive layers is 25 nm-40 nm.

[0011] At least three of the at least four conductive layers each have a thickness greater than or equal to 4 nm.

[0012] At least one of the at least four conductive layers has a minimum thickness, and at least one of the at least four conductive layers has a maximum thickness, the maximum thickness is greater than or equal to 2*the minimum thickness.

[0013] The minimum thickness is greater than or equal to 0.1*the total thickness of the at least four conductive layers.

[0014] The maximum thickness is 10 nm-16 nm.

[0015] At least three of the at least five dielectric layers each have a thickness greater than or equal to 50 nm.

[0016] The vehicle window glass has a maximum reflectivity Rmax, a minimum reflectivity Rmin, and an average reflectivity Ravg for the P-polarized light in the wavelength range of 460 nm-630 nm, Rmax-Ravg≤5%, and Ravg-Rmin≤5%.

[0017] The material of the conductive layer is selected from at least one of a metal and / or a metal alloy of Ag, Cu, Au, Pt, Ni, Cr, Ti, Al, In, Zn, and Sn.

[0018] At least one of the at least four conductive layers comprises at least two conductive sublayers, and at least one of the at least two conductive sublayers is a silver layer or a silver alloy layer.

[0019] At least one of the at least five dielectric layers comprises at least two dielectric sublayers.

[0020] The sheet resistance of the transparent nanofilm is 0.6-5Ω / D.

[0021] The vehicle window glass further comprises a first busbar and a second busbar electrically connected with the transparent nanofilm, and the transparent nanofilm has a heating power density of at least 500W / m 2 .

[0022] Two or three of the at least four conductive layers have a thickness greater than or equal to 10nm.

[0023] The application provides a vehicle, comprising a vehicle body and the head-up display vehicle window described above, the vehicle window glass is installed on the vehicle body, and the projection device is located in the vehicle body.

[0024] In summary, the application realizes the head-up display image without ghosting by enabling the vehicle window glass to reflect P-polarized light, and makes the visible light transmittance of the vehicle window glass greater than or equal to 70% and the total solar energy transmittance less than or equal to 50%, which not only guarantees the safety requirements of driving, but also makes the vehicle window glass have good heat insulation effect, meets the use demand of thermal comfort, and makes the vehicle window glass have excellent appearance and even further composite electric heating function to meet the safety driving demand of defrosting and defogging. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0026] Figure 1 is a structural schematic diagram of the head-up display vehicle window provided by the embodiment of the application.

[0027] Figure 2 is a structural schematic diagram of the transparent nanofilm provided by one embodiment of the application.

[0028] Figure 3 is a structural schematic diagram of the transparent nanofilm provided by another embodiment of the application. DETAILED DESCRIPTION

[0029] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0030] The present application provides a vehicle, comprising a vehicle body and a head-up display window, a window glass is installed on the vehicle body, and a projection device is located in the vehicle body. The head-up display window will be introduced as follows.

[0031] Referring to Figure 1 , the head-up display window comprises a window glass and a projection device 1, the projection device 1 is used to generate projection light 11 and project the projection light 11 onto the window glass to form a projection image, the projection light 11 comprises at least 70% of P-polarized light, the reflectivity of the P-polarized light of the window glass is greater than or equal to 5%, the visible light transmittance of the window glass is greater than or equal to 70%, and the total solar energy transmittance of the window glass is less than or equal to 50%. It can be understood that the component ratio of the P-polarized light in the projection light 11 is ≥70%, such as ≥90%, the higher the component ratio of the P-polarized light is, the more conducive to suppressing ghosting, and the most preferred is 100%, that is, pure P-polarized light. The projection device 1 includes but is not limited to laser, light-emitting diode (LED), liquid crystal display (LCD), digital light processing (DLP), electroluminescence (EL), cathode ray tube (CRT), vacuum fluorescent tube (VFD), collimating mirror, spherical correction mirror, convex lens, concave lens, reflecting mirror and / or polarizing mirror, etc. The position and incident angle of the projection device 1 are adjustable to adapt to the needs of different positions and heights. The incident angle θ of the projection light 11 can be any angle or angle range of 40°-75°, and the incident angle θ is preferably 50°-65°, which is more conducive to utilizing the Brewster angle effect and better suppressing ghosting.

[0032] In the present application, by setting the visible light transmittance of the window glass to be greater than or equal to 70% and the total solar energy transmittance to be less than or equal to 50%, the safety requirements of driving are ensured, the window glass has good heat insulation effect, and the use demand of thermal comfort is met.

[0033] In one specific embodiment, the vehicle window glass comprises a glass layer 2 and a transparent nanometer film 3, which is disposed on the glass layer 2. In order to realize the ghost-free head-up display image of the vehicle window glass, the transparent nanometer film 3 can reflect the P-polarized light in the projected light 11, and the generated reflected light 12 enters the human eye 100 to form the head-up display image. The reflectivity of the vehicle window glass to the P-polarized light incident at an incident angle of 40°-75° is greater than or equal to 5%, preferably greater than or equal to 10%, more preferably greater than or equal to 11%, further preferably greater than or equal to 12%, even greater than or equal to 13%, and even more greater than or equal to 14%.

[0034] In order to realize the color-neutral display of the head-up display image as much as possible, the reflection spectrum curve of the vehicle window glass to the incident P-polarized light should be as smooth as possible, and there is no significant local maximum and minimum. In one preferred embodiment, the vehicle window glass has a maximum reflectivity Rmax, a minimum reflectivity Rmin, and an average reflectivity Ravg to the P-polarized light in the wavelength range of 460nm-630nm, Rmax-Ravg≤5%, and Ravg-Rmin≤5%. This is also conducive to the design of the film system and the selection of the film layer material, and also conducive to reducing the blue light hazard. More preferably, Rmax-Ravg≤3%, and Ravg-Rmin≤3%. Most preferably, Rmax-Ravg≤1%, and Ravg-Rmin≤1%.

[0035] It can be understood that the area ratio of the transparent nanometer film 3 on the glass layer 2 is greater than or equal to 70%. That is, more than 70% of the area of the glass layer is covered with the transparent nanometer film 3, which can be exemplified by 80%, or 90%, or 95%, or even the transparent nanometer film 3 covers the glass layer 2, that is, 100% of the area of the glass layer is covered with the transparent nanometer film 3.

[0036] In one specific embodiment, the thickness of the transparent nanometer film 3 is 100nm-500nm. In the present application, the above thickness of the transparent nanometer film 3 can not only ensure that it is not damaged during the high-temperature heat treatment and bending forming process of the vehicle window glass above 560℃, but also can ensure that the visible light transmittance of the vehicle window glass is greater than or equal to 70%, meeting the safety requirements of driving.

[0037] In one specific embodiment, the glass layer 2 is a single piece of strengthened glass having an outer surface facing outward of the vehicle and an inner surface facing inward of the vehicle, and the transparent nanometer film 3 is arranged on the inner surface. In this embodiment, the glass layer 2 has opposite first and second surfaces, the first surface faces outward of the vehicle and is the outer surface, and the second surface faces inward of the vehicle and is the inner surface; the transparent nanometer film 3 is arranged on the second surface. When the vehicle window glass is installed on the vehicle, the single piece of strengthened glass is usually a curved physically tempered glass, of course, can be a curved chemically tempered glass, or even a curved injection-molded PC glass, and the thickness of the single piece of strengthened glass is 2.0-6.0 mm, and the visible light transmittance of the single piece of strengthened glass is 70%-95%.

[0038] In one specific embodiment, the glass layer 2 is a laminated glass, and the glass layer 2 comprises a first glass sub-layer 21, a second polymer sub-layer 22 and a second glass sub-layer 23, and the first glass sub-layer 21, the second polymer sub-layer 22 and the second glass sub-layer 23 are sequentially stacked to form the laminated glass; the first glass sub-layer 21 has opposite first and second surfaces 211 and 212, the second glass sub-layer 23 has opposite third and fourth surfaces 231 and 232, and the second polymer sub-layer 22 is arranged close to the second surface 212 and the third surface 231; the transparent nanometer film 3 is arranged on at least one of the second surface 212, the second polymer sub-layer 22, the third surface 231 and the fourth surface 232. It can be understood that the visible light transmittance of the laminated glass is 70%-95%.

[0039] It can be understood that the second polymer sub-layer 22 is used to bond the first glass sub-layer 21 and the second glass sub-layer 23 together to form the laminated glass, and the second polymer sub-layer 22 can be a thermoplastic film, which can be selected from at least one of polycarbonate (PC), polyvinyl chloride (PVC), polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), ionic interlayer (SGP) or polyurethane (PU). Of course, the thermoplastic film can be a single-layer structure or a multi-layer structure, for example, a double-layer structure, a triple-layer structure, a four-layer structure, a five-layer structure, etc. The thermoplastic film can also have other functions, for example, at least one colored area is arranged as a shading band to reduce the interference of sunlight on the human eye, or an infrared absorber is added to have a sunscreen or heat insulation function, or an ultraviolet absorber is added to have an ultraviolet shielding function, or the content of plasticizer in one layer of the multi-layer structure is higher to have a sound insulation function. The second polymer sub-layer 22 can be transparent, for example, transparent PVB, or colored, for example, gray PVB, etc.

[0040] It can be understood that the second polymer sub-layer 22 can be a wedge-shaped interlayer, that is, the second polymer sub-layer 22 has a wedge-shaped cross-sectional profile, the wedge-shaped interlayer is used to correct the ghosting of the reflection image of the transparent nanometer film 3 and the reflection image of the first surface 211, the second surface 212, the third surface 231 or the fourth surface 232, the wedge angle α is 0.01 mrad-0.18 mrad, for example, 0.05 mrad, 0.10 mrad, 0.15 mrad, 0.18 mrad, etc., in this way, a thermoplastic film with a smaller wedge angle can be used, and the reflection ghosting and the perspective ghosting can be eliminated at the same time in a low-cost manner, so that a higher-quality head-up display image and observation effect can be obtained, and the perspective ghosting caused by the scenery in the external environment of the vehicle penetrating through the windshield can be eliminated.

[0041] It can be understood that the thickness of the first glass sub-layer 21 can be 0.7-4.0 mm, for example, 3.5 mm, 3.0 mm, 2.1 mm, 1.8 mm or 1.6 mm, etc.; the thickness of the second glass sub-layer 23 can be 0.7-4.0 mm, for example, 2.1 mm, 1.8 mm, 1.6 mm, 1.1 mm, 0.7 mm, etc.; preferably, the thickness of the second glass sub-layer 23 is smaller than the thickness of the first glass sub-layer 21, which can meet the strength requirements of the vehicle window glass and also achieve the lightweight requirement of the thin laminated glass. Optionally, the thickness of the second polymer sub-layer 22 is 0.38-1.5 mm.

[0042] The first glass sub-layer 21 and the second glass sub-layer 23 are selected from one or two of the physical toughened glass, the chemical toughened glass and the injection-molded PC glass, for example, the first glass sub-layer 21 and the second glass sub-layer 23 are both physical toughened glass, or both are chemical toughened glass, or both are injection-molded PC glass, or one is physical toughened glass and the other is chemical toughened glass, or one is physical toughened glass and the other is injection-molded PC glass, or one is chemical toughened glass and the other is injection-molded PC glass; when the vehicle window glass is installed on a vehicle, the first glass sub-layer 21 serves as an outer glass plate, the first surface 211 faces outward, and the second glass sub-layer 23 serves as an inner glass plate, the fourth surface 232 faces inward. The first glass sub-layer 21 or the second glass sub-layer 23 can be selected from transparent glass or colored glass, for example, green glass, gray glass, etc.

[0043] Optionally, the first glass sub-layer 21 can be a physically strengthened curved glass plate with a thickness greater than or equal to 1.8 mm, for example, obtained by high-temperature heat treatment at a temperature of at least 560°C and bending molding; the second glass sub-layer 23 can also be a physically strengthened curved glass plate, or a non-physically strengthened curved glass plate with a thickness less than or equal to 1.6 mm. Using a thinner second glass sub-layer 23 can achieve better head-up display effect. The thickness of the second glass sub-layer 23 can be 0.7-1.2 mm. The non-physically strengthened curved glass plate can be a chemically strengthened soda-lime-silica glass, a chemically strengthened alumino-silicate glass, a chemically strengthened borosilicate glass, a self-strengthened soda-lime-silica glass, a self-strengthened alumino-silicate glass, or a self-strengthened borosilicate glass, etc. Chemical strengthening is mainly through ion exchange of ions with different ion radii on the surface of the glass to produce a high surface stress on the surface of the glass, accompanied by a certain stress layer depth, thereby improving the strength of the glass in terms of mechanical properties. The self-strengthening glass refers to a glass that does not need to be physically strengthened or chemically strengthened, and the original glass can be directly combined with another glass to form a laminated glass, and the quality of the laminated glass meets the use standards of automotive laminated glass, such as GB9656-2016 Automotive Safety Glass in China, etc.

[0044] Optionally, the transparent nanofilm 3 is deposited on the second surface 212. In this way, the transparent nanofilm 3 is located between the first glass sub-layer 21 and the second polymer sub-layer 22 and is not in direct contact with the environment, thereby improving the product combination freedom of the laminated glass and meeting the different needs of more vehicle models. In this embodiment, the fourth surface 232 can also be provided with a functional layer, which includes but is not limited to a single-layer anti-reflection film, a double-layer anti-reflection film, a three-layer anti-reflection film, a four-layer anti-reflection film, a hydrophilic film structure, a hydrophobic film structure, a P-polarized light anti-reflection film structure, etc.

[0045] Optionally, the transparent nanofilm 3 can also be provided on at least one surface of the second polymer sub-layer 22, for example, on the surface of the second polymer sub-layer 22 facing the first glass sub-layer 21, or on the surface of the second polymer sub-layer 22 facing the second glass sub-layer 23.

[0046] Optionally, the transparent nanofilm 3 can be deposited on the third surface 231. In this way, the transparent nanofilm 3 is located between the second glass sub-layer 23 and the second polymer sub-layer 22 and is not in direct contact with the environment, thereby improving the product combination freedom of the laminated glass and meeting the different needs of more vehicle models.

[0047] Optionally, the transparent nanofilm 3 is disposed on the fourth surface 232. In this way, the transparent nanofilm 3 is deposited on the PET, and the PET with the transparent nanofilm 3 is bonded to the fourth surface 232. The transparent nanofilm 3 is located between the fourth surface 232 and the PET, and the projected light will reach the transparent nanofilm 3 first, which can greatly improve the reflectivity of the car window glass to the projected light.

[0048] In one specific embodiment, the transparent nanofilm 3 comprises at least five dielectric layers and at least four conductive layers, which are alternately stacked, with each conductive layer located between two adjacent dielectric layers to protect the conductive layers. By providing at least four conductive layers, the total solar transmittance of the vehicle window glass is less than or equal to 50%, thus enabling the vehicle window glass to achieve a head-up display function while also having good heat insulation, meeting the requirements for thermal comfort.

[0049] The conductive layer is made of at least one of the following metals and / or metal alloys: silver (Ag), copper (Cu), gold (Au), platinum (Pt), nickel (Ni), chromium (Cr), titanium (Ti), aluminum (Al), indium (In), zinc (Zn), and tin (Sn). Optionally, at least one of the at least four conductive layers comprises at least two conductive sublayers, thereby improving the environmental resistance of the transparent nanofilm 3 and the processability of the window glass. At least one of the at least two conductive sublayers is a silver layer or a silver alloy layer, wherein the silver content in the silver alloy layer is greater than or equal to 95%. Specific examples include Ag / Cu / Ag, AgNi / Cr, Ag / AgCu, NiCr / Ag / NiCr, etc.

[0050] In a specific embodiment, such as Figure 2 As shown, the transparent nanofilm 3 includes five dielectric layers and four conductive layers, which are alternately stacked. Figure 2 The transparent nanofilm 3 is shown to be deposited on the second surface 212 of the first glass sublayer 21. The arrangement of the five dielectric layers and four conductive layers is as follows: first dielectric layer / first conductive layer / second dielectric layer / second conductive layer / third dielectric layer / third conductive layer / fourth dielectric layer / fourth conductive layer / fifth dielectric layer.

[0051] In this application, by setting five dielectric layers and four conductive layers, the total solar transmittance of the car window glass with transparent nanofilm 3 is less than or equal to 50%. While achieving a ghost-free head-up display image, it also improves the heat insulation effect of the car window glass and meets the safe driving requirement of visible light transmittance greater than or equal to 70%.

[0052] In a specific embodiment, such as Figure 3As shown, the transparent nanometer film 3 includes six layers of dielectric layers and five layers of conductive layers, which are alternately and laminatedly arranged. Figure 3 It is shown that the transparent nanometer film 3 is deposited on the third surface 231 of the second glass sub-layer 23, and the six layers of dielectric layers and the five layers of conductive layers are arranged in the following manner: first dielectric layer / first conductive layer / second dielectric layer / second conductive layer / third dielectric layer / third conductive layer / fourth dielectric layer / fourth conductive layer / fifth dielectric layer / fifth conductive layer / sixth dielectric layer.

[0053] In the present application, by arranging the six layers of dielectric layers and the five layers of conductive layers, the total solar transmittance of the vehicle window glass provided with the transparent nanometer film 3 is less than or equal to 50%, which not only realizes the head-up display image without ghosting, but also improves the heat insulation effect of the vehicle window glass, and meets the safety driving requirement that the visible light transmittance is greater than or equal to 70%.

[0054] In one specific embodiment, the total thickness of the at least four layers of conductive layers is 25nm-40nm, which can make the transparent nanometer film 3 have good heat insulation performance and electric heating performance, and at the same time, the visible light transmittance of the vehicle window glass is greater than 70%. Alternatively, at least three of the at least four layers of conductive layers have a thickness greater than or equal to 4nm, for example, when the transparent nanometer film 3 includes four layers of conductive layers, the thickness of three of the four layers of conductive layers can be set to be greater than or equal to 4nm, or the thickness of all the four layers of conductive layers can be set to be greater than or equal to 4nm; for another example, when the transparent nanometer film 3 includes five layers of conductive layers, the thickness of three of the five layers of conductive layers can be set to be greater than or equal to 4nm, or the thickness of four of the five layers of conductive layers can be set to be greater than or equal to 4nm, or the thickness of all the five layers of conductive layers can be set to be greater than or equal to 4nm.

[0055] In one specific embodiment, at least one of the at least four layers of conductive layers has a minimum thickness, and at least one of the at least four layers of conductive layers has a maximum thickness, and the maximum thickness is greater than or equal to twice the minimum thickness, for example, the thickness of the conductive layer with the minimum thickness is 5nm, and the thickness of the conductive layer with the maximum thickness is 14.9nm. Alternatively, the minimum thickness is greater than or equal to 0.1 times the total thickness of the at least four layers of conductive layers. Alternatively, the maximum thickness is 10nm-16nm.

[0056] In the present application, the medium layer not only serves to protect the conductive layer from damage, but also serves to adjust the visible light transmittance and appearance color of the transparent nanometer film 3, preferably so that the transmittance color of the vehicle window glass is not yellowish, the TL(b) of the visible light transmittance color is less than or equal to 5, and the visible light interior reflection color of the vehicle window glass is not reddish and not yellowish, the R4L(a) of the interior reflection color is less than or equal to 4, and the R4L(b) of the interior reflection color is less than or equal to 4. Whether measured from the inner surface of the vehicle window glass or from the outer surface of the vehicle window glass, the a value of the visible light reflection color of the vehicle window glass is -10 to 4, and the b value of the visible light reflection color of the vehicle window glass is -15 to 4 at normal incidence based on the CIE1976 Lab color space. The a value of the visible light reflection color of the vehicle window glass is -10 to 4, and the b value of the visible light reflection color of the vehicle window glass is -15 to 4 at an incident angle of 60°.

[0057] In a specific embodiment, at least three of the at least five medium layers each have a thickness greater than or equal to 50 nm, the medium layer can serve to protect the conductive layer, enabling it to withstand baking, pressing, etc. above 560°C, can also have an anti-reflection effect, and can promote the growth of the conductive layer or avoid (or reduce) oxidation, nitridation, etc. of the conductive layer by reactive gas and / or functional groups during the plating process. The material of the medium layer is selected from oxides, nitrides, or oxynitrides of at least one of Zn, Ti, Si, Al, Sn, Se, Zr, Ni, In, Cr, W, Ca, Y, Nb, Cu, Sm, etc. For example, it can be zinc tin oxide (ZnSnOx), aluminum-doped zinc oxide (AZO), titanium oxide (TiOx), silicon zirconium nitride (SiZrN), silicon aluminum nitride (SiALN), silicon aluminum oxide (SiAlO), etc. Optionally, at least one of the at least five medium layers comprises at least two medium sub-layers, which can each serve a different purpose; some medium sub-layers serve to protect the conductive layer, serving as a protective layer, such as a ZnSnOx layer, a SiN layer, while also having an anti-reflection effect; some medium sub-layers serve to promote the growth of the conductive layer, serving as a promotion layer, such as an AZO layer, which is in direct contact with the conductive layer, and is disposed above and / or below the conductive layer.

[0058] It can be understood that the vehicle window glass of the present application comprises a transparent nanometer film 3, which comprises at least four conductive layers, and the sheet resistance of the transparent nanometer film is 0.6-5 Ω / □, making it suitable for electric heating use, so that it can quickly dehumidify, defrost, and even deice, and therefore the vehicle window glass of the present application also has an electric heating function, and is suitable for a power supply of 8V to 48V. Specifically, the vehicle window glass further comprises a first bus bar and a second bus bar electrically connected to the transparent nanometer film 3, and the first bus bar and the second bus bar can be respectively electrically connected to two electrodes of the power supply, so as to introduce electric current into the transparent conductive film, so that the transparent nanometer film has at least 500 W / m2 between the first bus bar and the second bus bar.2 a heating power density of ≥ 3000 W / m 2 at a power supply voltage of 48 V, for example, when the distance between the first busbar and the second busbar is 0.7 m. The first busbar and the second busbar can be made of one or more of silver paste, copper foil, and aluminum foil.

[0059] Two specific structures of the transparent nanofilm 3 will be introduced as follows.

[0060] The first one is as shown in Figure 2 . The dielectric layer has five layers, and the conductive layer has four layers. The arrangement of the five layers of dielectric layer (first dielectric layer, second dielectric layer, third dielectric layer, fourth dielectric layer, and fifth dielectric layer) and the four layers of conductive layer (first conductive layer, second conductive layer, third conductive layer, and fourth conductive layer) is as follows: first dielectric layer / first conductive layer / second dielectric layer / second conductive layer / third dielectric layer / third conductive layer / fourth dielectric layer / fourth conductive layer / fifth dielectric layer.

[0061] Specific examples are as follows:

[0062] The first dielectric layer has a thickness of 35 nm-60 nm and contains ZnSnOx, SiN, AZO, etc., and is in direct contact with the second surface 212 or the third surface 231.

[0063] The first conductive layer has a thickness of 4 nm-16 nm and contains silver or silver alloy, etc.

[0064] The second dielectric layer has a thickness of 50 nm-100 nm and contains ZnSnOx, SiN, AZO, etc.

[0065] The second conductive layer has a thickness of 4 nm-9 nm and contains silver or silver alloy, etc.

[0066] The third dielectric layer has a thickness of 50 nm-100 nm and contains ZnSnOx, SiN, AZO, etc.

[0067] The third conductive layer has a thickness of 4 nm-16 nm and contains silver or silver alloy, etc.

[0068] The fourth dielectric layer has a thickness of 50 nm-110 nm and contains ZnSnOx, SiN, AZO, etc.

[0069] The fourth conductive layer has a thickness of 4 nm-16 nm and contains silver or silver alloy, etc.

[0070] The fifth dielectric layer has a thickness of 30 nm-60 nm and contains ZnSnOx, SiN, AZO, etc.

[0071] Among them, at least one of the first conductive layer, the third conductive layer, and the fourth conductive layer has a thickness of 10nm-16nm.

[0072] The second type: such as Figure 3 As shown, there are six dielectric layers and five conductive layers. The arrangement of the six dielectric layers (first dielectric layer, second dielectric layer, third dielectric layer, fourth dielectric layer, fifth dielectric layer, and sixth dielectric layer) and the five conductive layers (first conductive layer, second conductive layer, third conductive layer, fourth conductive layer, and fifth conductive layer) is as follows: first dielectric layer / first conductive layer / second dielectric layer / second conductive layer / third dielectric layer / third conductive layer / fourth dielectric layer / fourth conductive layer / fifth dielectric layer / fifth conductive layer / sixth dielectric layer.

[0073] For specific examples:

[0074] The first dielectric layer, with a thickness of 30nm-60nm, contains ZnSnOx, SiN, AZO, etc., and is in direct contact with the second surface 212 or the third surface 231.

[0075] The first conductive layer has a thickness of 4nm-16nm and contains silver or silver alloys, etc.

[0076] The second dielectric layer has a thickness of 60nm-120nm and includes ZnSnOx, SiN, AZO, etc.

[0077] The second conductive layer has a thickness of 4nm-9nm and contains silver or silver alloys, etc.

[0078] The third dielectric layer has a thickness of 50nm-100nm and includes ZnSnOx, SiN, AZO, etc.

[0079] The third conductive layer, with a thickness of 4nm-16nm, contains silver or silver alloys, etc.

[0080] The fourth dielectric layer, with a thickness of 50nm-110nm, contains ZnSnOx, SiN, AZO, etc.

[0081] The fourth conductive layer, with a thickness of 4nm-9nm, contains silver or silver alloys, etc.

[0082] The fifth dielectric layer, with a thickness of 50nm-110nm, contains ZnSnOx, SiN, AZO, etc.

[0083] The fifth conductive layer, with a thickness of 4nm-16nm, contains silver or silver alloys, etc.

[0084] The sixth dielectric layer, with a thickness of 20nm-60nm, contains ZnSnOx, SiN, AZO, etc.

[0085] Among them, at least one of the first conductive layer, the third conductive layer and the fifth conductive layer has a thickness of 10-16 nm.

[0086] Embodiments

[0087] Hereinafter, some embodiments of the present application are described to further illustrate the present application, but the present application is not limited to the following embodiments.

[0088] The thickness described in the present application is a physical thickness.

[0089] Visible light transmittance TL: measured according to ISO 9050 at normal incidence, based on A light source.

[0090] a value of visible light transmittance color TL(a): measured at normal incidence, based on CIE 1976, D65 light source.

[0091] b value of visible light transmittance color TL(b): measured at normal incidence, based on CIE 1976, D65 light source.

[0092] Visible light reflectance RL: measured according to ISO 9050 at 8° incidence angle, based on A light source.

[0093] a value of visible light reflectance color RL(a): measured at 8° incidence angle, based on CIE 1976, D65 light source.

[0094] b value of visible light reflectance color RL(b): measured at 8° incidence angle, based on CIE 1976, D65 light source.

[0095] First surface visible light reflectance R1L: measured according to ISO 9050 at 60° incidence angle, based on A light source.

[0096] a value of first surface visible light reflectance color R1L(a): measured at 60° incidence angle, based on CIE 1976, D65 light source.

[0097] b value of first surface visible light reflectance color R1L(b): measured at 60° incidence angle, based on CIE 1976, D65 light source.

[0098] Fourth surface visible light reflectance R4L: measured according to ISO 9050 at 60° incidence angle, based on A light source.

[0099] a value of fourth surface visible light reflectance color R4L(a): measured at 60° incidence angle, based on CIE 1976, D65 light source.

[0100] b value of fourth surface visible light reflectance color R4L(b): measured at 60° incidence angle, based on CIE 1976, D65 light source.

[0101] Polarized light reflectance Rp: measured according to ISO 9050 at 60° angle of incidence.

[0102] a value of the P polarized light reflectance Rp(a), measured at 60° angle of incidence, based on CIE 1976, D65 illuminant.

[0103] b value of the P polarized light reflectance Rp(b), measured at 60° angle of incidence, based on CIE 1976, D65 illuminant.

[0104] Polarized light reflectance at 460 nm Rp(460), at 530 nm Rp(530), at 630 nm Rp(630): measured from the fourth surface at 60° angle of incidence with PerkinElmer Lambda 950.

[0105] Total solar energy transmittance Tts: measured according to ISO 13837.

[0106] Comparative Example 1 and Examples 1-3

[0107] The first glass sublayer 21, the second polymer sublayer 22 and the second glass sublayer 23 were prepared, the transparent nanofilm 3 was deposited onto the second surface 212 of the first glass sublayer 21 or the third surface 231 of the second glass sublayer 23, and the automotive glazing structure of Comparative Example 1 and Examples 1-3 in Table 1 were obtained according to the automotive glazing production process.

[0108] Table 1: Automotive glazing structures of Comparative Example 1 and Examples 1-3

[0109]

[0110]

[0111] The automotive glazing structures of Comparative Example 1 and Examples 1-3 were tested for optical properties, and the results are listed in Table 2.

[0112] Table 2: Optical properties results of Comparative Example 1 and Examples 1-3

[0113]

[0114]

[0115] From Table 1 and Table 2, it can be seen that: Comparative Example 1 and Examples 1-3 all use transparent nanometer film of four silver film system, TL(b) of Comparative Example 1 is greater than 7, which is obviously yellow, R4L(a) is greater than 4, which is obviously red, and Tts is greater than or equal to 50%, which has poor heat insulation effect; compared with Comparative Example 1, TL(b) of Examples 1-3 is less than or equal to 4, which is not yellow, R4L(a) is less than or equal to 1, which is not red, and Examples 1-3 have good appearance and reflected color; at the same time, Rp of Examples 1-3 is greater than or equal to 10%, or greater than or equal to 12%, or greater than or equal to 13%, and the difference between Rp(460), Rp(530) and Rp(630) is less than 3%, or even less than 1.5%, which has good HUD performance and visual effect; the thickness of the first conductive layer, the third conductive layer or the fourth conductive layer of Examples 1-3 is greater than or equal to 10 nm, and Tts is less than or equal to 50%, which has good heat insulation effect.

[0116] Comparative Example 2 and Examples 4-6

[0117] The first glass sub-layer 21, the second polymer sub-layer 22 and the second glass sub-layer 23 were prepared, the transparent nanometer film 3 was deposited on the second surface 212 of the first glass sub-layer 21 or the third surface 231 of the second glass sub-layer 23, and the vehicle window glass structure of Comparative Example 2 and Examples 4-6 in Table 3 was obtained according to the production process of automobile glass.

[0118] Table 3: Vehicle window glass structure of Comparative Example 2 and Examples 4-6

[0119]

[0120]

[0121] The vehicle window glass of Comparative Example 2 and Examples 4-6 obtained was tested for optical performance, and the test results are listed in Table 4.

[0122] Table 4: Optical performance results of Comparative Example 2 and Examples 4-6

[0123]

[0124]

[0125] As can be seen from Table 3 and Table 4, the comparative example 2 and the examples 4-6 all adopt transparent nanometer films of the five-silver film system. Although the R4L(a) and Tts of the comparative example 2 are improved, the TL(b) of the comparative example 2 is greater than 9, which is obviously yellowish, and the difference between the Rp(460), Rp(530) and Rp(630) of the comparative example 2 is greater than 6%, which affects the visual effect of the head-up display (HUD). Compared with the comparative example 2, the TL(b) of the examples 1-3 is less than or equal to 4, which is not yellowish and has a good appearance. At the same time, the Rp of the examples 1-3 is greater than or equal to 10%, or greater than or equal to 11%, or greater than or equal to 14%. The difference between the Rp(460), Rp(530) and Rp(630) of the examples 1-3 is less than 2%, or even less than 0.5%, which has a good head-up display (HUD) performance and visual effect. The thickness of the first conductive layer or the fifth conductive layer of the examples 4-6 is greater than or equal to 10 nm, and the Tts is less than or equal to 50%, which has a good heat insulation effect.

[0126] The above disclosure is only the preferred embodiments of the present application, and of course cannot limit the scope of the rights of the present application. Those skilled in the art can understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made according to the claims of the present application still belong to the scope covered by the application.

Claims

1. A head-up display vehicle window, comprising a window glass and a projection device, wherein the window glass comprises a glass layer and a transparent nanofilm, the transparent nanofilm being disposed on the glass layer, the projection device being used to generate projection light and project the projection light onto the window glass to form a projected image, the projection light comprising at least 70% P-polarized light, the transparent nanofilm being capable of reflecting at least a portion of the incident P-polarized light, the projection light being projected onto the window glass at an incident angle of 40°-75°, and the reflectivity of the window glass for the P-polarized light being greater than or equal to 10%; The visible light transmittance of the vehicle window glass is greater than or equal to 70%, and the total solar energy transmittance of the vehicle window glass is less than or equal to 50%. The transparent nanofilm comprises at least five dielectric layers and at least four conductive layers, wherein the at least five dielectric layers and the at least four conductive layers are alternately stacked, and at least three of the at least five dielectric layers have a thickness greater than or equal to 50 nm. The head-up display window has P-polarized light reflectance Rp(460) at 460nm, P-polarized light reflectance Rp(530) at 530nm and P-polarized light reflectance Rp(630) at 630nm, and the range between Rp(460), Rp(530) and Rp(630) is less than 3%.

2. The head-up display window according to claim 1, characterized in that, The thickness of the transparent nanofilm is 100nm-500nm.

3. The head-up display window according to claim 1, characterized in that, The transparent nanofilm accounts for 70% or more of the area of ​​the glass layer.

4. The head-up display window according to claim 1, characterized in that, The glass layer is a single-layer reinforced glass, which has an outer surface facing outwards and an inner surface facing inwards, and the transparent nanofilm is disposed on the inner surface.

5. The head-up display window according to claim 1, characterized in that, The glass layer is a laminated glass, comprising a first glass sublayer, a second polymer sublayer, and a second glass sublayer, which are sequentially disposed to form the laminated glass. The first glass sublayer has a first surface and a second surface opposite to each other, and the second glass sublayer has a third surface and a fourth surface opposite to each other. The second polymer sublayer is disposed close to the second surface and the third surface. The transparent nanofilm is disposed on the second surface, at least one surface of the second polymer sublayer, the third surface, or the fourth surface.

6. The head-up display window according to claim 1, characterized in that, The total thickness of the at least four conductive layers is 25nm-40nm.

7. The head-up display window according to claim 1, characterized in that, At least three of the at least four conductive layers have a thickness greater than or equal to 4 nm.

8. The head-up display window according to claim 1, characterized in that, At least one of the at least four conductive layers has a minimum thickness, and at least one of the at least four conductive layers has a maximum thickness, wherein the maximum thickness is ≥ 2 * the minimum thickness.

9. The head-up display window according to claim 8, characterized in that, The minimum thickness is ≥0.1 * the total thickness of the at least four conductive layers.

10. The head-up display window according to claim 8, characterized in that, The maximum thickness is 10nm-16nm.

11. The head-up display window according to claim 1, characterized in that, The material of the conductive layer is selected from at least one of the following metals and / or metal alloys: Ag, Cu, Au, Pt, Ni, Cr, Ti, Al, In, Zn, and Sn.

12. The head-up display window according to claim 1, characterized in that, At least one of the at least four conductive layers comprises at least two conductive sublayers, and at least one of the at least two conductive sublayers is a silver layer or a silver alloy layer.

13. The head-up display window according to claim 1, characterized in that, At least one of the at least five dielectric layers comprises at least two dielectric sublayers.

14. The head-up display window according to claim 1, characterized in that, The vehicle window glass has a maximum reflectivity Rmax, a minimum reflectivity Rmin, and an average reflectivity Ravg for P-polarized light in the wavelength range of 460nm-630nm, where Rmax-Ravg≤5% and Ravg-Rmin≤5%.

15. The head-up display window according to claim 1, characterized in that, The sheet resistance of the transparent nanofilm is 0.6-5 Ω / □.

16. The head-up display window according to claim 1, characterized in that, The vehicle window glass also includes a first busbar and a second busbar electrically connected to the transparent nanofilm, wherein the transparent nanofilm has a strength of at least 500 W / m between the first busbar and the second busbar. 2 The heating power density.

17. The head-up display window according to claim 1, characterized in that, The transparent nanofilm comprises five dielectric layers and four conductive layers, and the transparent nanofilm is configured as follows: first dielectric layer / first conductive layer / second dielectric layer / second conductive layer / third dielectric layer / third conductive layer / fourth dielectric layer / fourth conductive layer / fifth dielectric layer; The thickness of the first dielectric layer is 35nm-60nm; The thickness of the first conductive layer is 4nm-16nm; The thickness of the second dielectric layer is 50nm-100nm; The thickness of the second conductive layer is 4nm-9nm; The thickness of the third dielectric layer is 50nm-100nm; The thickness of the third conductive layer is 4nm-16nm; The thickness of the fourth dielectric layer is 50nm-110nm; The thickness of the fourth conductive layer is 4nm-16nm; The thickness of the fifth dielectric layer is 30nm-60nm; Wherein, at least one of the first conductive layer, the third conductive layer, and the fourth conductive layer has a thickness of 10nm-16nm.

18. The head-up display window according to claim 1, characterized in that, The transparent nanofilm comprises six dielectric layers and five conductive layers, and the transparent nanofilm is arranged as follows: first dielectric layer / first conductive layer / second dielectric layer / second conductive layer / third dielectric layer / third conductive layer / fourth dielectric layer / fourth conductive layer / fifth dielectric layer / fifth conductive layer / sixth dielectric layer; The thickness of the first dielectric layer is 30nm-60nm; The thickness of the first conductive layer is 4nm-16nm; The thickness of the second dielectric layer is 60nm-120nm; The thickness of the second conductive layer is 4nm-9nm; The thickness of the third dielectric layer is 50nm-100nm; The thickness of the third conductive layer is 4nm-16nm; The thickness of the fourth dielectric layer is 50nm-110nm; The thickness of the fourth conductive layer is 4nm-9nm; The thickness of the fifth dielectric layer is 50nm-110nm; The thickness of the fifth conductive layer is 4nm-16nm; The thickness of the sixth dielectric layer is 20nm-60nm; Among them, at least one of the first conductive layer, the third conductive layer, and the fifth conductive layer has a thickness of 10nm-16nm.

19. A vehicle, characterized in that, The vehicle includes a vehicle body and a head-up display window as described in any one of claims 1-18, wherein the window glass is mounted on the vehicle body and the projection device is located inside the vehicle body.

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