Vehicle window glass

Abstract

Vehicle window glass, comprising an outer glass sheet (10), an inner glass sheet (30), a bonding layer (20), a low-emissivity layer (40) and light-emitting elements (50), wherein the outer glass sheet (10) comprises a first surface (11) and a second surface (12), the inner glass sheet (30) comprises a third surface (31) and a fourth surface (32), and the bonding layer (20) is located between the second surface (12) and the third surface (31); light emitted by the light-emitting elements (50) can pass through the low-emissivity layer (40) and enter the interior of a vehicle; the inner glass sheet (30) provided with the low-emissivity layer (40) exhibits a first light transmittance TL1 for the light emitted by the light-emitting elements (50), wherein TL1≥80%; and the emissivity e of the vehicle window glass, measured from the side of the fourth surface (32), is less than 0.3. The vehicle window glass contributes to maintaining the overall brightness of illumination / ambient lighting, ensuring that when the light emitted by the light-emitting elements (50) entering the vehicle passes through the inner glass sheet (30) and the low-emissivity layer (40), the shortcomings such as reduced color richness of ambient lighting, reduced brightness of ambient lighting, color shift of ambient lighting, or non-uniform overall brightness of illumination / ambient lighting are avoided.

Description

A type of car window glass

[0001] Cross-reference information

[0002] This application claims priority to Chinese Patent Application No. 202411842716.6, filed on December 13, 2024, entitled "A Type of Vehicle Window Glass", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of glass manufacturing technology, specifically providing a vehicle window glass. Background Technology

[0004] As vehicles become increasingly intelligent, the demand for intelligent light control is growing daily. This allows drivers and passengers to experience more scenarios and atmospheres. Illuminated glass with ambient lighting effects is often used to enhance or create the atmosphere inside the car, and it has received widespread attention from manufacturers and is favored by consumers.

[0005] As sunroofs become increasingly larger, especially panoramic sunroofs or panoramic sunroofs on electric vehicles, the interior space of these vehicles becomes extremely hot in summer due to high temperatures and strong direct sunlight, and extremely cold in winter due to heat loss from the outside. More and more vehicles are addressing this issue by adding a low-emissivity film to the surface of the sunroof glass closest to the interior space to achieve a "warm in winter, cool in summer" effect. In summer, this low-emissivity film reduces the amount of long-wave heat radiation emitted from the heated sunroof glass into the vehicle interior, effectively preventing heat from entering. In winter, it reduces heat radiation from the vehicle interior to the outside environment, preventing heat loss from the vehicle.

[0006] Currently, some high-end cars are often equipped with vehicles that combine multiple functions, such as providing a vehicle that has both ambient lighting effects and low radiation effects. Since the light that produces the ambient lighting effect is transmitted from the interior of the vehicle to the interior of the vehicle, it must pass through the low radiation film layer to reach the interior of the vehicle and be observed by the occupants.

[0007] When low-emissivity films in existing technologies are used in conjunction with luminescent glass that provides ambient lighting effects, they have drawbacks such as reducing the richness of ambient light colors, decreasing the brightness of ambient light, causing color distortion of ambient light, or making the overall brightness of the lighting / ambient light uneven. Summary of the Invention

[0008] To address the aforementioned technical problems, the purpose of this application is to provide a vehicle window glass, wherein the low-emissivity film layer of the vehicle window glass has a low impact on the reflectivity and absorptivity of the light that produces the ambient lighting effect, and the transmission ratio of red, green, and blue colors is uniform, thereby providing a vehicle that has both an ambient lighting effect and a low-emissivity effect, with rich and unbiased colors, high brightness, and overall uniformity in the ambient lighting effect.

[0009] To achieve the above objectives, this application provides a vehicle window glass, which includes an outer glass panel, an inner glass panel, and an adhesive layer. The outer glass panel includes a first surface and a second surface, the inner glass panel includes a third surface and a fourth surface, and the adhesive layer is located between the second surface and the third surface.

[0010] The vehicle window glass also includes a low-emissivity layer and a light-emitting element. The low-emissivity layer is disposed on the fourth surface, and the light-emitting element is mounted on the vehicle window glass. The light emitted by the light-emitting element can pass through the fourth surface and the low-emissivity layer.

[0011] The inner glass plate with the low-emissivity layer has a first transmittance TL1 for the light emitted by the light-emitting element, wherein TL1 ≥ 80%;

[0012] The emissivity e of the window glass, measured from one side of the fourth surface, is less than 0.3.

[0013] In the aforementioned vehicle window glass, a low-emissivity layer is disposed on the fourth surface of the inner glass panel, i.e., on the inner surface of the vehicle window glass, to reduce the emissivity of the vehicle window glass. Preferably, the emissivity of the vehicle window glass, e≤0.25 or e≤0.2, is measured from the fourth surface side.

[0014] In the aforementioned vehicle window glass, preferably, the light-emitting element is disposed on the first surface, or on the second surface, or on the third surface, or between the second surface and the third surface, or on the end face of the outer glass panel.

[0015] In the aforementioned vehicle window glass, preferably, the light-emitting element is disposed on the fourth surface or on the end face of the inner glass panel; the vehicle window glass also includes at least one light extraction element, and the light emitted by the light-emitting element passes through the fourth surface and the low-emissivity layer after being transmitted by the light extraction element and enters the interior of the vehicle.

[0016] The light extraction element is disposed on the second surface, or on the third surface, or between the second surface and the third surface.

[0017] In the aforementioned vehicle window glass, preferably, TL1 ≥ 85%, or TL1 ≥ 90%, or TL1 ≥ 92%.

[0018] In the aforementioned vehicle window glass, preferably, the light emitted by the light-emitting element has a transmitted color RGB value after passing through the fourth surface and the low-emissivity layer, the RGB value satisfying: R:G≥1 and / or R:B≥1.

[0019] In the aforementioned vehicle window glass, preferably, 1:1.01≤R:G≤1:0.99 and 1:1.01≤R:B≤1:0.99.

[0020] In the aforementioned vehicle window glass, preferably, 1:1.005≤R:G≤1:0.995, and / or 1:1.005≤R:B≤1:0.995.

[0021] In the aforementioned vehicle window glass, preferably, the low-emissivity layer includes at least one transparent conductive oxide (TCO) layer, the total physical thickness of the transparent conductive oxide layer being 50nm-300nm, and the material of the transparent conductive oxide layer being selected from one or more combinations of doped zinc oxide, indium tin oxide (ITO), and fluorine-doped tin oxide (FTO), wherein the doped zinc oxide is zinc oxide doped with one or more combinations of aluminum, tungsten, hafnium, gallium, yttrium, niobium, and neodymium.

[0022] In the aforementioned vehicle window glass, preferably, the low-emissivity layer further includes at least two first dielectric layers, each of the transparent conductive oxide layers being located between two adjacent first dielectric layers, wherein the material of the first dielectric layer is selected from one or more combinations of oxides, nitrides and oxynitrides of Zn, Ti, Si, Al, Sn, Se, Zr, Ni, In, Cr, W, Ca, Y, Nb, Cu, and Sm.

[0023] In the aforementioned vehicle window glass, preferably, the outer glass panel is transparent glass, ultra-transparent glass, or tinted glass; wherein:

[0024] The total iron content of the transparent glass, calculated as Fe2O3, is less than or equal to 0.1 wt%, and the visible light transmittance of the transparent glass is greater than or equal to 85%.

[0025] The total iron content of the ultra-transparent glass, calculated as Fe2O3, is less than or equal to 0.015 wt%, and the visible light transmittance of the ultra-transparent glass is greater than or equal to 90%.

[0026] The tinted glass has a total iron content of 0.9 wt% to 2.2 wt% based on Fe2O3, and the visible light transmittance of the tinted glass is less than 85%. The tinted glass is green glass, gray glass, blue glass, or brown glass.

[0027] In the aforementioned vehicle window glass, preferably, the outer glass panel is a single pane of glass, insulated glass, vacuum glass, or laminated glass.

[0028] In the aforementioned vehicle window glass, preferably, the visible light transmittance TL2 of the inner glass panel and the visible light transmittance TL3 of the inner glass panel with a low-emissivity layer satisfy: TL3 / TL2≥0.95, or TL3 / TL2≥1.

[0029] In the aforementioned vehicle window glass, preferably, the visible light transmittance TL2 of the inner glass panel is ≥85%, or TL2 is ≥90%; the visible light transmittance TL3 of the inner glass panel with a low-emissivity layer is ≥81%, or TL3 is ≥85%, or TL3 is ≥90%.

[0030] In the aforementioned vehicle window glass, preferably, the haze of the inner glass panel with a low-emissivity layer is less than or equal to 1%;

[0031] Alternatively, the haze of the inner glass panel with a low-emissivity layer is less than or equal to 0.5%;

[0032] Alternatively, the haze of the inner glass panel with a low-emissivity layer is less than or equal to 0.3%.

[0033] In the aforementioned vehicle window glass, preferably, the inner glass panel is transparent glass or ultra-transparent glass;

[0034] The transparent glass has a total iron content of less than or equal to 0.1 wt% based on Fe2O3, and the visible light transmittance of the transparent glass is greater than or equal to 85%.

[0035] The total iron content of the ultra-transparent glass, calculated as Fe2O3, is less than or equal to 0.015 wt%, and the visible light transmittance of the ultra-transparent glass is greater than or equal to 90%.

[0036] In the aforementioned vehicle window glass, preferably, the adhesive layer is a transparent thermoplastic polymer film or a colored thermoplastic polymer film, the thickness of the adhesive layer is 0.38mm-2.28mm, and the material of the thermoplastic polymer film is selected from one or more combinations of polyvinyl butyral, polyurethane, ethylene-vinyl acetate copolymer and ionic polymers; the visible light transmittance of the transparent thermoplastic polymer is greater than or equal to 80%; the visible light transmittance of the colored thermoplastic polymer film is less than or equal to 50%, or less than or equal to 20%, or less than or equal to 10%, or less than or equal to 5%.

[0037] In the aforementioned vehicle window glass, preferably, the light-emitting element is selected from at least one of LED, OLED, MicroLED, MiniLED, and EL elements.

[0038] In the aforementioned vehicle window glass, preferably, the light extraction element is selected from at least one of the following: an engraved structure inside the inner glass plate, an engraved structure on the third surface of the inner glass plate, a printed structure on the third surface of the inner glass plate, a film layer on the third surface of the inner glass plate, and a thin film located between the outer glass plate and the inner glass plate.

[0039] In the aforementioned vehicle window glass, preferably, an infrared reflective layer is provided between the outer glass panel and the adhesive layer; and the total solar transmittance of the vehicle window glass is less than or equal to 55%, or less than or equal to 30%, or less than or equal to 20%, or less than or equal to 15%.

[0040] The infrared reflective layer comprises at least one metal layer and at least two second dielectric layers, wherein the metal layer is located between the two second dielectric layers, and the material of the metal layer is selected from silver, gold, copper, aluminum, platinum, and alloys of two or more of these metals. The material of the second dielectric layer is selected from oxides, nitrides, and oxynitrides containing one or more of Zn, Ti, Si, Al, Sn, Se, Zr, Ni, In, Cr, W, Ca, Y, Nb, Cu, Sm, La, Mg, Ce, Mo, Sb, and Bi.

[0041] In the aforementioned vehicle window glass, preferably, the vehicle window glass further includes a dimming element, the adhesive layer includes a first adhesive layer and a second adhesive layer, the dimming element is disposed between the first adhesive layer and the second adhesive layer, and the dimming element is selected from at least one of polymer dispersed liquid crystal film, suspended particle film, electrochromic film, and dye liquid crystal film.

[0042] In the aforementioned vehicle window glass, preferably, the a value of the reflected color of the inner surface of the vehicle window glass satisfies -5≤a≤2, and the b value satisfies -11≤b≤0.

[0043] The vehicle window glass provided in this application uses an inner glass panel with high visible light transmittance and a low-emissivity layer, which can be well used in conjunction with the light-emitting elements, helping to maintain the overall brightness of the lighting / ambient lighting. Moreover, by controlling the RGB ratio of the transmitted colors of the inner glass panel and the low-emissivity layer to be relatively close, it is beneficial to make the effect of the inner glass panel with the low-emissivity layer close to or almost identical to that of using transparent glass. This ensures that when the light emitted by the light-emitting elements entering the vehicle passes through the inner glass panel and the low-emissivity layer, there will be no disadvantages such as reducing the richness of ambient light colors, reducing the brightness of ambient light, causing color distortion of ambient light, or causing uneven overall brightness of the lighting / ambient lighting.

[0044] The vehicle window glass provided in this application has an emissivity e < 0.3 when measured from the fourth surface side, meaning the emissivity e < 0.3 on the inner side of the vehicle window glass. In summer, it can effectively block the transfer of heat from the outside of the vehicle to the inside of the vehicle, and in winter, it can block the loss of heat from the inside of the vehicle to the outside, thus achieving excellent heat insulation in summer and heat preservation in winter. Attached Figure Description

[0045] Figure 1 is a partial cross-sectional schematic diagram of the first embodiment of the vehicle window glass provided in this application.

[0046] Figure 2 is a partial cross-sectional schematic diagram of the second embodiment of the vehicle window glass provided in this application.

[0047] Figure 3 is a partial cross-sectional schematic diagram of the third embodiment of the vehicle window glass provided in this application.

[0048] Figure 4 is a partial cross-sectional schematic diagram of the fourth embodiment of the vehicle window glass provided in this application.

[0049] Figure 5 is a partial cross-sectional schematic diagram of the fifth embodiment of the vehicle window glass provided in this application.

[0050] Figure 6 is a partial cross-sectional schematic diagram of the sixth embodiment of the vehicle window glass provided in this application. Detailed Implementation

[0051] In order to provide a clearer understanding of the technical features, objectives and beneficial effects of this application, the technical solution of this application is described in detail below, but this should not be construed as limiting the scope of implementation of this application.

[0052] As shown in Figures 1 to 6, the vehicle window glass provided in this application is installed on a vehicle. The vehicle window glass includes an outer glass panel 10, an inner glass panel 30, and an adhesive layer 20. The outer glass panel 10 includes a first surface 11 and a second surface 12, and the inner glass panel 30 includes a third surface 31 and a fourth surface 32. The adhesive layer 20 is located between the second surface 12 and the third surface 31. When the vehicle window glass is installed on a vehicle, the first surface 11 is away from the adhesive layer 20 and in contact with the external environment of the vehicle; the second surface 12 is close to the adhesive layer 20; the third surface 31 is close to the adhesive layer 20; and the fourth surface 32 is away from the adhesive layer 20 and close to the internal environment of the vehicle. The adhesive layer 20 connects the second surface 12 and the third surface 31.

[0053] The vehicle window glass also includes a low-emissivity layer 40 and a light-emitting element 50. The low-emissivity layer 40 is disposed on the fourth surface 32, and the light-emitting element 50 is installed on the vehicle window glass. The light emitted by the light-emitting element 50 can pass through the fourth surface 32 and the low-emissivity layer 40 and enter the interior of the vehicle. The light emitted by the light-emitting element 50 can provide lighting or ambient lighting effects for the interior of the vehicle.

[0054] The inner glass plate 30, which has the low-emissivity layer 40, has a first transmittance TL1 for the light emitted by the light-emitting element 50, wherein TL1 ≥ 80%. Specific examples of TL1 include 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, and 95%. This application uses an inner glass plate with TL1 ≥ 80% and a low-emissivity layer, which works well with the light-emitting element 50 and helps maintain the overall brightness of the lighting / ambient light. Furthermore, by controlling the RGB ratio of the transmitted colors of the inner glass plate and the low-emissivity layer to be relatively close, it helps to make the effect of the inner glass plate with the low-emissivity layer close to or almost identical to that of using transparent glass. This ensures that when the light emitted by the light-emitting element 50 enters the vehicle and passes through the inner glass plate 30 and the low-emissivity layer 40, there will be no reduction in the richness of ambient light colors, a decrease in ambient light brightness, color distortion of the ambient light, or uneven overall brightness of the lighting / ambient light. The light emitted by the light-emitting element 50 is visible light, meaning the wavelength of the light emitted by the light-emitting element 50 is in the range of 380nm to 780nm. Preferably, the TL1 is ≥85%, ≥90%, or ≥92%.

[0055] The emissivity e of the window glass, measured from one side of the fourth surface 32, is less than 0.3, giving the window glass a low emissivity. The emissivity of the window glass without the low-emissivity layer 40 is around 0.9. Window glass with low emissivity can achieve heat insulation in summer and heat preservation in winter. Specific examples of the emissivity e of the window glass include 0.29, 0.28, 0.27, 0.26, 0.25, 0.20, 0.18, and 0.15, etc.; preferably, the emissivity e of the laminated glass 1 is e≤0.25 or e≤0.2. The window glass provided in this application has a low emissivity e, which can effectively block heat exchange between the inside and outside of the vehicle, achieving heat insulation in summer and heat preservation in winter without requiring an interior sunshade.

[0056] In Figure 1, the light-emitting element 50 is disposed on the third surface 31, and the light emitted by the light-emitting element 50 passes directly through the inner glass plate 30, the fourth surface 32 and the low-emissivity layer 40 into the interior of the vehicle. In other embodiments, it is understood that the light-emitting element 50 may be disposed on the first surface 11, and the light emitted by the light-emitting element 50 directly passes through the outer glass plate 10, the adhesive layer 20, the inner glass plate 30, the fourth surface 32, and the low-emissivity layer 40 to enter the interior of the vehicle; or, the light-emitting element 50 may also be disposed on the second surface 12, and the light emitted by the light-emitting element 50 directly passes through the adhesive layer 20, the inner glass plate 30, the fourth surface 32, and the low-emissivity layer 40 to enter the interior of the vehicle; or, the light-emitting element 50 may also be disposed between the second surface 12 and the third surface 31, for example, located in the adhesive layer 20, and the light emitted by the light-emitting element 50 directly passes through part of the adhesive layer 20, the inner glass plate 30, the fourth surface 32, and the low-emissivity layer 40 to enter the interior of the vehicle; or, the light-emitting element 50 may also be disposed on the end face 13 of the outer glass plate 10, and the light emitted by the light-emitting element 50 directly passes through part of the outer glass plate 10, the adhesive layer 20, the inner glass plate 30, the fourth surface 32, and the low-emissivity layer 40 to enter the interior of the vehicle.

[0057] In Figures 2 and 3, the light-emitting element 50 is disposed on the fourth surface 32, and the window glass also includes at least one light extraction element 60. The light emitted by the light-emitting element 50 passes through the fourth surface 32 and the low-emissivity layer 40 after being transmitted by the light extraction element 60 and enters the interior of the vehicle. The light extraction element 60 is disposed on the second surface 12, or on the third surface 31, or between the second surface 12 and the third surface 31.

[0058] As shown in Figure 2, the vehicle window glass also includes a light guide element 70. The light-emitting element 50 and the light guide element 70 are disposed on the fourth surface 32 by a fixing device 90. The area of ​​the fourth surface 32 covered by the light-emitting element 50 and the light guide element 70 is not provided with the low-emissivity layer 40. The light emitted by the light-emitting element 50 is coupled into the inner glass plate 30 through the light guide element 70. The light emitted by the light-emitting element 50 transmitted in the inner glass plate 30 is coupled out from the fourth surface 32 after being transmitted by the light extraction element 60, and passes through the low-emissivity layer 40 to enter the interior of the vehicle, thereby achieving a lighting effect or ambient lighting effect.

[0059] Unlike Figure 2, Figure 3 shows that the area covered by the light-emitting element 50 and the light-guiding element 70 on the fourth surface 32 is provided with the low-emissivity layer 40. The light emitted by the light-emitting element 50 passes through the low-emissivity layer 40 through the light-guiding element 70 and is then coupled into the inner glass plate 30. The light emitted by the light-emitting element 50, after being transmitted in the inner glass plate 30, is coupled out from the fourth surface 32 after being transmitted by the light extraction element 60, and passes through the low-emissivity layer 40 into the interior of the vehicle, thereby achieving a lighting effect or ambient lighting effect.

[0060] In Figures 4, 5, and 6, the light-emitting element 50 is disposed on the end face 33 of the inner glass plate 30; the vehicle window glass also includes at least one light extraction element 60, and the light emitted by the light-emitting element 50 passes through the fourth surface 32 and the low-emissivity layer 40 after being transmitted by the light extraction element 60 and enters the interior of the vehicle; the light extraction element 60 is disposed on the second surface 12, or on the third surface 31, or between the second surface 12 and the third surface 31.

[0061] As shown in Figure 4, the outer glass panel 10 is larger than the inner glass panel 30. The light-emitting element 50 is mounted on the end face 33 of the inner glass panel 30 via a fixing device 90. The fixing device 90 does not cover the low-emissivity layer 40, so there is no need for a light guide element 70. The light emitted by the light-emitting element 50 passes directly through the end face 33 of the inner glass panel 30 and enters the inner glass panel 30. The light emitted by the light-emitting element 50, which is transmitted in the inner glass panel 30, is transmitted through the light extraction element 60 and then outputs from the fourth surface 32. It then passes through the low-emissivity layer 40 and enters the interior of the vehicle, thereby achieving a lighting effect or ambient lighting effect.

[0062] Unlike Figure 4, the fixing device 90 shown in Figure 5 covers the low-emissivity layer 40 and does not require the light guide element 70. The light emitted by the light-emitting element 50 passes directly through the end face 33 of the inner glass plate 30 and enters the inner glass plate 30. The light emitted by the light-emitting element 50 transmitted in the inner glass plate 30 is transmitted through the light extraction element 60 and then output from the fourth surface 32, and passes through the low-emissivity layer 40 to enter the interior of the vehicle, thereby achieving the lighting effect or ambient lighting effect.

[0063] In Figures 1 to 5, the outer glass panel 10 is a single piece of glass, which helps to reduce the thickness and weight of the vehicle window glass, thereby achieving lightweighting. In Figure 6, the outer glass panel 10 is laminated glass, which includes a first glass panel 100, an intermediate layer 102, and a second glass panel 101; it can be understood that the outer glass panel 10 can also be insulated glass or vacuum glass. Using laminated glass, insulated glass, or vacuum glass for the outer glass panel 10 helps to improve the overall strength and heat and sound insulation performance of the vehicle window glass.

[0064] In this application, the light emitted by the light-emitting element 50 has a transmitted color RGB value after passing through the fourth surface 32 and the low-emissivity layer 40. The RGB value satisfies: R:G≤1 and / or R:B≤1, thereby avoiding excessive red light and causing visual discomfort.

[0065] Preferably, 1:1.01≤R:G≤1:0.99 and 1:1.01≤R:B≤1:0.99, by controlling the RGB ratio of the transmitted colors of the inner glass panel and the low-emissivity layer to be relatively close, it is beneficial to make the effect of the inner glass panel with the low-emissivity layer close to or almost identical to that of using transparent glass. This ensures that when the light emitted by the light-emitting element 50 entering the vehicle passes through the inner glass panel 30 and the low-emissivity layer 40, there will be no disadvantages such as reducing the richness of ambient light colors, reducing the brightness of ambient light, causing color deviation of ambient light, or causing uneven overall brightness of the lighting / ambient light. More preferably, 1:1.005≤R:G≤1:0.995, and / or 1:1.005≤R:B≤1:0.995.

[0066] The outer glass panel 10 can be transparent glass, ultra-transparent glass, or tinted glass. The transparent glass has a total iron (Fe2O3) content of less than or equal to 0.1 wt% and a visible light transmittance of greater than or equal to 85%. The ultra-transparent glass has a total iron (Fe2O3) content of less than or equal to 0.015 wt% and a visible light transmittance of greater than or equal to 90%. Tinted glass can block visible light and solar radiation, providing privacy and better heat insulation for the vehicle. The total iron (Fe2O3) content of the tinted glass is between 0.9 wt% and 2.2 wt%, specifically examples being 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.05%, 2.1%, or 2.2%, but is not limited to these. The tinted glass has a visible light transmittance of less than 85%, preferably less than 70%, more preferably 5% to 45%, specifically 5%, 10%, 15%, 20%, 30%, 40%, or 45%, etc., but is not limited thereto. The tinted glass can be green glass, gray glass, blue glass, or brown glass, etc. In some embodiments, the tinted glass is green glass with a visible light transmittance of 75%-83%; in some embodiments, the tinted glass is gray glass with a visible light transmittance of 34%-45%; in some embodiments, the tinted glass is gray glass with a visible light transmittance of 10%-33%.

[0067] The thickness of the outer glass panel 10 is 1.6mm-4.0mm. For example, the thickness of the outer glass panel 10 can be 1.6mm, 1.8mm, 2.1mm, 2.3mm, 2.6mm, 3.2mm, 3.5mm, 4.0mm, etc., but is not limited to these. From the perspective of vehicle safety strength, the thickness of the outer glass panel 10 is preferably 2.1mm-3.5mm. The material of the outer glass panel 10 can be soda-lime glass, high-alumina glass, lithium aluminum glass, or borosilicate glass, etc.

[0068] The inner glass panel 30 can be either clear glass (standard clear glass) or ultra-clear glass (ultra-clear glass). The total iron content of the clear glass is less than or equal to 0.1 wt%, and the visible light transmittance is greater than or equal to 85%. The total iron content of the ultra-clear glass is less than or equal to 0.015 wt%, and the visible light transmittance is greater than or equal to 90%. The thickness of the inner glass panel is 0.7 mm to 3.5 mm. For example, the thickness of the inner glass panel 30 can be 0.7 mm, 0.9 mm, 1.1 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2.1 mm, 2.3 mm, 2.6 mm, 3.2 mm, 3.5 mm, etc., but is not limited to these. From the perspective of vehicle lightweighting, a thickness of 0.7 mm to 2.1 mm is preferred for the inner glass panel 30. The material of the inner glass panel 30 can be soda-lime glass, high-alumina glass, lithium aluminum glass, or borosilicate glass, etc.

[0069] The visible light transmittance TL2 of the inner glass plate 30 and the visible light transmittance TL3 of the inner glass plate 30 with the low-emissivity layer 40 satisfy the following: TL3 / TL2≥0.95, or TL3 / TL2≥1. That is, the low-emissivity layer 40 hardly reduces the visible light transmittance TL3 of the inner glass plate 30 with the low-emissivity layer 40, and thus hardly affects the lighting effect / ambient light effect of the light-emitting element 50. Preferably, the visible light transmittance TL2 of the inner glass plate 30 is ≥85%, or TL2≥90%; the visible light transmittance TL3 of the inner glass plate 30 with the low-emissivity layer 40 is ≥81%, or TL3≥85%, or TL3≥90%.

[0070] In this application, the haze of the inner glass plate 30 with the low-emissivity layer 40 is less than or equal to 1%; or, the haze of the inner glass plate 30 with the low-emissivity layer 40 is less than or equal to 0.5%; or, the haze of the inner glass plate 30 with the low-emissivity layer 40 is less than or equal to 0.3%. The lower haze of the inner glass plate 30 with the low-emissivity layer 40 is beneficial to improving the lighting effect / ambient lighting effect of the light-emitting element 50.

[0071] The adhesive layer 20 is a transparent or colored thermoplastic polymer film, and its thickness is 0.38 mm to 2.28 mm. For example, the thickness of the adhesive layer 20 can be, but is not limited to, 0.38 mm, 0.76 mm, 1.14 mm, 1.52 mm, 1.9 mm, 2.28 mm, or other values ​​between 0.38 mm and 2.28 mm. The 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 ionic polymer (SGP).

[0072] When the adhesive layer 20 is a transparent thermoplastic polymer, the visible light transmittance of the transparent thermoplastic polymer is greater than or equal to 80%. For example, the visible light transmittance of the adhesive layer 20 may be, but is not limited to, 80%, 85%, 90%, or 95%.

[0073] When the adhesive layer 20 is a colored thermoplastic polymer film, the visible light transmittance of the colored thermoplastic polymer film is less than or equal to 50%. For example, the visible light transmittance of the adhesive layer 20 can be, but is not limited to, 50%, 44%, 40%, 38%, 35%, 32%, 30%, 27%, 25%, 23%, 20%, 18%, 16%, 13%, 10%, 8%, 6%, 5%, 2%, or 1%. Preferably, the visible light transmittance of the colored thermoplastic polymer film is less than or equal to 20%; more preferably, the visible light transmittance of the colored thermoplastic polymer film is less than or equal to 10%; even more preferably, the visible light transmittance of the colored thermoplastic polymer film is less than or equal to 5%. The colored thermoplastic polymer film can be a gray thermoplastic polymer film, a green thermoplastic polymer film, or a blue thermoplastic polymer film.

[0074] The light-emitting element 50 emits light to create lighting or ambient lighting effects. The light emitted by the light-emitting element 50 can be directly incident on the inner glass plate 30 or coupled into the inner glass plate 30. The light-emitting element 50 can be any one of LED (inorganic light-emitting diode), OLED (organic light-emitting diode), MicroLED, MiniLED, or EL (electroluminescent) elements. White light-emitting diodes are generally composed of red, green, and blue LEDs.

[0075] The light extraction element 60 is used to transmit light emitted by the light-emitting element 50 entering the inner glass plate 30 through the fourth surface 32 and the low-emissivity layer 40 to enter the interior of the vehicle. For example, the light extraction element 60 can change the direction of the light emitted by the light-emitting element 50 transmitted in the inner glass plate 30 by reflection and / or scattering. The light extraction element 60 is selected from at least one of the following: an internal engraved structure of the inner glass plate 30, an engraved structure on the third surface 31 of the inner glass plate 30, a printed structure on the third surface 31 of the inner glass plate 30, a film layer on the third surface 31 of the inner glass plate 30, and a thin film located between the outer glass plate 10 and the inner glass plate 30. The engraved structure can be formed inside the inner glass plate 30 by laser engraving or on the third surface 31 of the inner glass plate 30. The printed structure can be formed on the third surface 31 of the inner glass plate 30 by spraying, screen printing, or other methods to apply reflective ink or scattering ink. The film layer can be formed on the third surface 31 of the inner glass plate 30 by chemical vapor deposition or physical vapor deposition processes, preferably by magnetron sputtering. As for the form of the film, commercially available light extraction films can be used.

[0076] The low-emissivity layer 40 is disposed on the fourth surface 32 of the inner glass plate 30, i.e., on the inner surface of the window glass, to reduce the emissivity of the window glass. The low-emissivity layer 40 includes at least one transparent conductive oxide (TCO) layer. The material of the transparent conductive oxide layer can be selected from at least one of doped zinc oxide, indium tin oxide (ITO), and fluorine-doped tin oxide (FTO). The doped zinc oxide can be one or more of the elements such as aluminum, tungsten, hafnium, gallium, yttrium, niobium, and neodymium, specifically at least one of aluminum-doped zinc oxide (AZO), yttrium-doped zinc oxide (YZO), hafnium and aluminum-doped zinc oxide (HAZO), tungsten and aluminum-doped zinc oxide (W-AZO), and gallium-doped zinc oxide (GZO).

[0077] The total physical thickness of the transparent conductive oxide layer in the low-emissivity layer 40 is 50nm-300nm. The low-emissivity layer 40 also includes at least two first dielectric layers, with each transparent conductive oxide layer located between two adjacent first dielectric layers. The transparent conductive oxide layer and the first dielectric layers can be formed by magnetron sputtering processes. By optimizing the materials and thicknesses of the transparent conductive oxide layer and the first dielectric layers, the low-emissivity layer can withstand subsequent high-temperature heat treatment or other bending and forming processes, and the resulting window glass meets the optical and mechanical properties required for automotive glass. Furthermore, the low-emissivity layer achieves an anti-reflection effect, reducing or even eliminating the obvious reflections of passengers and objects inside the vehicle on the sunroof glass caused by specular reflection, thus avoiding visual interference for passengers, especially rear passengers, and improving the user experience. Optionally, the material of the first dielectric layer is selected from at least one oxide, nitride, or oxynitride selected from Zn, Ti, Si, Al, Sn, Se, Zr, Ni, In, Cr, W, Ca, Y, Nb, Cu, and Sm. For example, it can be silicon nitride (SiN), silicon oxide (SiO2), zinc tin oxide (ZnSnOx), zinc aluminum oxide (AZO), titanium oxide (TiOx), silicon zirconium nitride (SiZrNx), silicon aluminum nitride (SiAlNx), silicon aluminum oxide (SiAlOx), etc.

[0078] In Figures 1 to 6, the infrared reflective layer 80 can reflect infrared rays in sunlight, thereby reducing the total solar transmittance of the vehicle and improving the thermal comfort of the in-vehicle environment. The total solar transmittance (TTS) of the window glass with the infrared reflective layer 80 is less than or equal to 55%, more preferably less than or equal to 30%, further less than or equal to 20%, or even less than or equal to 15%. The lower the total solar transmittance, the better the heat insulation performance of the window glass.

[0079] An infrared reflective layer 80 is disposed between the outer glass plate 10 and the adhesive layer 20. Specifically, it can be disposed on the second surface 12 of the outer glass plate 10, or it can be disposed on a thermoplastic film such as PET. The thermoplastic film with the infrared reflective layer 80 is sandwiched between the second surface 12 and the adhesive layer 20. In order to maximize the reflection of infrared rays in sunlight by the infrared reflective layer 80, the outer glass plate 10 is preferably transparent glass or ultra-transparent glass.

[0080] The infrared reflective layer 80 includes at least one metal layer and at least two second dielectric layers, with each metal layer located between two adjacent second dielectric layers. The metal layer material can be silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), or other metals or metal alloys. In this application, silver or a silver alloy is preferred, and the silver alloy is preferably an alloy of silver with at least one of gold, aluminum, copper, or platinum. Depending on the specific application, the number of metal layers in the infrared reflective layer 80 can be, for example, two, three, four, five, or even more; taking silver or a silver alloy as an example, there can be double-silver infrared reflective layers, triple-silver infrared reflective layers, quadruple-silver infrared reflective layers, and penta-silver infrared reflective layers, etc. The material of the second dielectric layer can be selected from at least one oxide, nitride, or oxynitride of Zn, Ti, Si, Al, Sn, Se, Zr, Ni, In, Cr, W, Ca, Y, Nb, Cu, Sm, La, Mg, Ce, Mo, Sb, and Bi, such as zinc tin oxide (ZnSnOx), zinc oxide (ZnO), tin oxide (SnOx), niobium oxide (NbOx), bismuth oxide (BiOx), aluminum zinc oxide (AZO), zirconium oxide (ZrOx), silicon zirconium nitride (SiZrNx), silicon aluminum nitride (SiALNx), titanium oxide (TiOx), etc.

[0081] The metal layer and the second dielectric layer can be formed by magnetron sputtering, and the thickness of each metal layer is 4nm-20nm. By optimizing the materials and thickness of the metal layer and the second dielectric layer, the infrared reflective layer can withstand subsequent high-temperature heat treatment or other bending and forming processes, and the optical and mechanical properties of the obtained car window glass can meet the standards for use in automotive glass.

[0082] In some other embodiments, the window glass also includes a dimming element (not shown) disposed between the second surface 12 and the third surface 31. Specifically, the adhesive layer 20 includes a first adhesive layer and a second adhesive layer, with the dimming element located between the first adhesive layer and the second adhesive layer. The dimming element is used to adjust the visible light transmittance of the window glass to meet the optical performance requirements of different usage scenarios.

[0083] Dimming elements can be polymer-dispersed liquid crystal films (PDLC), suspended particle films (SPD), electrochromic films (EC), dye liquid crystal films (LC), etc. The minimum visible light transmittance of the dimming element is less than or equal to 10%, such as 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0%, etc., but not limited to these. Furthermore, the maximum visible light transmittance of the dimming element can be set as needed, such as 10%, 20%, 30%, 50%, 70%, 80%, 90%, etc., but not limited to these. Specifically, for example, the visible light transmittance of the dimming element can be adjusted between 0% and 20%, or between 0.5% and 50%, or between 1% and 70%, or between 5% and 90%, to meet the visible light transmittance requirements of various scenarios.

[0084] The following detailed description of the vehicle window glass provided in this application is based on specific embodiments and comparative examples, using the inner glass panel 30 and low-emissivity layer 40 of the vehicle window glass shown in Figure 2 as an example for testing:

[0085] Comparative Examples 1-4:

[0086] Comparative Example 1: Both the outer and inner glass panels are made of 2.1mm thick transparent glass, the adhesive layer is made of 0.76mm thick gray PVB, and no low-emissivity layer is provided;

[0087] Comparative Example 2: Both the outer and inner glass plates are made of 2.1 mm thick transparent glass, and the adhesive layer is made of 0.76 mm thick gray PVB. The composition and physical thickness of the low-emissivity layer are shown in Table 1. The SiO2 layer in the low-emissivity layer is the layer furthest away from the fourth surface.

[0088] Comparative Example 3: Both the outer and inner glass plates are made of 2.1 mm thick transparent glass, the adhesive layer is made of 0.76 mm thick gray PVB, and the composition and physical thickness of the low-emissivity layer are shown in Table 1. The SiO2 layer in the low-emissivity layer is the layer furthest away from the fourth surface.

[0089] Comparative Example 4: Both the outer and inner glass plates are made of 2.1 mm thick green glass, the adhesive layer is made of 0.76 mm thick transparent PVB, and the composition and physical thickness of the low-emissivity layer are shown in Table 1. The SiO2 layer in the low-emissivity layer is the layer furthest away from the fourth surface.

[0090] The film structure and related parameters of the inner glass plate and low-emissivity layer of Comparative Examples 1-4 are shown in Table 1.

[0091] The testing methods for each parameter are as follows:

[0092] First transmittance TL1: The transmittance of light with wavelengths from 380nm to 780nm by the inner glass plate of Comparative Example 1 and the inner glass plates with low-emissivity layers of Comparative Examples 2-4, tested according to the method specified in ISO 9050.

[0093] Transmitted RGB values: Based on the standard CIE 1931, the transmitted RGB values ​​of light emitted from the D65 light source after passing through the fourth surface and the low-emissivity layer are measured and calculated from the low-emissivity layer side.

[0094] Emissivity e: Measured from the lower emissivity side using an emissivity meter.

[0095] Visible light reflectance: The visible light reflectance of the window glass is measured and calculated from the fourth side according to the method specified in ISO 9050.

[0096] Reflection color α value: Based on standard CIE1976, the α value of the reflection color Lab value of the window glass to light emitted by the D65 light source is measured and calculated from the fourth side.

[0097] Reflection color b value: Based on the standard CIE1976, the b value of the reflection color Lab value of the window glass to light emitted by the D65 light source is measured and calculated from the fourth side.

[0098] Table 1: Test results of Comparative Examples 1-4

[0099] As can be seen from the contents of Table 1:

[0100] The inner glass panel of Comparative Example 1 uses highly transparent glass without a low-emissivity layer, resulting in a color RGB ratio of 1:1.001:1.002, which is almost close to 1:1:1. The proportion of red light is the lowest. This ensures that the light transmitted by the light extraction element entering the vehicle will not reduce the richness of ambient light colors, reduce the brightness of ambient light, cause color distortion of ambient light, or cause uneven brightness of the overall lighting / ambient light when it passes through the inner glass panel. However, it does not have a low-emissivity effect.

[0101] The inner glass panel of Comparative Example 2 uses highly transparent glass and has a low-emissivity layer, which causes a large color shift in the RGB ratio of the transmitted colors, with R:G < 1:1.01 and R:B < 1:1.01. This results in disadvantages such as reduced color richness of the ambient lights, reduced brightness of the ambient lights, color shift of the ambient lights, or uneven overall brightness of the lighting / ambient lights when the light entering the vehicle passes through the inner glass panel and the low-emissivity layer.

[0102] The inner glass panel of Comparative Example 3 uses highly transparent glass with a low-emissivity layer, which causes a significant color shift in the RGB ratio of the transmitted colors. 1:1.01≤R:B≤1:0.990 meets the requirements, but R:G>1:0.990. This results in drawbacks such as reduced color richness of the ambient lights, reduced brightness of the ambient lights, color shift of the ambient lights, or uneven overall brightness of the lighting / ambient lights when the light transmitted by the light extraction element enters the vehicle and passes through the inner glass panel.

[0103] The inner glass panel of Comparative Example 4 uses high-transmittance green glass and has a low-emissivity layer, which causes a large color shift in the RGB ratio of the transmitted color. 1:1.01≤R:G≤1:0.990 meets the requirements, but R:B>1:0.990. This results in drawbacks such as reduced richness of ambient light colors, reduced brightness of ambient light, color shift of ambient light, or uneven overall brightness of lighting / ambient light when the light provided by the light extraction element entering the vehicle passes through the inner glass panel.

[0104] Comparative Examples 5-6 and Examples 1-2

[0105] Comparative Example 5: Both the outer and inner glass plates are made of 2.1 mm thick gray glass, the adhesive layer is made of 0.76 mm thick transparent PVB, and the composition and physical thickness of the low-emissivity layer are shown in Table 2. The SiO2 layer in the low-emissivity layer is the layer furthest away from the fourth surface.

[0106] Comparative Example 6: Both the outer and inner glass plates are made of 2.1 mm thick transparent glass, and the adhesive layer is made of 0.76 mm thick transparent PVB. The composition and physical thickness of the low-emissivity layer are shown in Table 2. The 70 nm SiO2 layer in the low-emissivity layer is the layer furthest from the fourth surface.

[0107] Example 1: Both the outer and inner glass plates are made of 2.1 mm thick transparent glass, the adhesive layer is made of 0.76 mm thick transparent PVB, and the composition and physical thickness of the low-emissivity layer are shown in Table 2. The SiO2 layer in the low-emissivity layer is the layer furthest away from the fourth surface.

[0108] Example 2: Both the outer and inner glass plates are made of 2.1 mm thick transparent glass, the adhesive layer is made of 0.76 mm thick transparent PVB, and the composition and physical thickness of the low-emissivity layer are shown in Table 2. The SiO2 layer in the low-emissivity layer is the layer furthest away from the fourth surface.

[0109] The film structure and related parameters of the inner glass plate and low-emissivity layer of Comparative Examples 5-6 and Examples 1-2 are shown in Table 2.

[0110] Table 2: Test results of Comparative Examples 5-6 and Examples 1-2

[0111] As can be seen from the contents of Table 2:

[0112] In Comparative Example 5, the inner glass panel uses low-transmittance gray glass and has a low-emissivity layer, resulting in a significant color shift in the RGB ratio of the transmitted colors. While 1:1.01 ≤ R:B ≤ 1:0.990 meets the requirements, R:G > 1:0.990. This leads to drawbacks such as reduced color richness of the ambient lighting, decreased brightness of the ambient lighting, color distortion of the ambient lighting, and uneven overall brightness of the lighting / ambient lighting when light transmitted through the light extraction element into the vehicle passes through the inner glass panel. Furthermore, the inner glass panel with the low-emissivity layer has a first transmittance TL1 of far less than 80% for light emitted by the light-emitting element, significantly reducing the overall brightness of the lighting / ambient lighting.

[0113] The inner glass panel of Comparative Example 6 is made of transparent glass and has a low-emissivity layer, which causes a serious color shift in the RGB ratio of the transmitted colors. R:G < 1:1.01 and R:B < 1:1.01, which do not meet the requirements. This results in the light entering the vehicle and transmitted by the light extraction element passing through the inner glass panel, which reduces the richness of ambient light colors, reduces the brightness of ambient light, causes color shift in ambient light, or causes uneven brightness of the overall lighting / ambient light.

[0114] Examples 3-6

[0115] Example 3: Both the outer and inner glass plates are made of 2.1 mm thick transparent glass, the adhesive layer is made of 0.76 mm thick gray PVB, and the composition and physical thickness of the low-emissivity layer are shown in Table 3. The SiO2 layer in the low-emissivity layer is the layer furthest away from the fourth surface.

[0116] Example 4: Both the outer and inner glass plates are made of 2.1 mm thick transparent glass, the adhesive layer is made of 0.76 mm thick gray PVB, and the composition and physical thickness of the low-emissivity layer are shown in Table 3. The SiZrN layer in the low-emissivity layer is the layer furthest away from the fourth surface.

[0117] Example 5: Both the outer and inner glass plates are made of 2.1 mm thick transparent glass, the adhesive layer is made of 0.76 mm thick gray PVB, and the composition and physical thickness of the low-emissivity layer are shown in Table 3. The SiZrN layer in the low-emissivity layer is the layer furthest away from the fourth surface.

[0118] Example 6: Both the outer and inner glass plates are made of 2.1 mm thick transparent glass, the adhesive layer is made of 0.76 mm thick gray PVB, and the composition and physical thickness of the low-emissivity layer are shown in Table 3. The SiZrN layer in the low-emissivity layer is the layer furthest away from the fourth surface.

[0119] The film structure and related parameters of the inner glass plate and low-emissivity layer in Examples 3-6 are shown in Table 3.

[0120] Table 3: Test Results of Examples 3-6

[0121] As can be seen from the contents of Tables 2 and 3:

[0122] The first transmittance TL1 of Examples 1-6 is all above 90%, and can reach a maximum of above 93%, which is beneficial to maintaining the overall brightness of the lighting / ambient lights.

[0123] In the RGB ratio of transmitted colors, at least one of R:G and R:B is less than or equal to 1:1, which can avoid visual discomfort caused by an excessive proportion of red light. The RGB ratios of transmitted colors in Examples 1-6 all satisfy 1:1.01≤R:G≤1:0.99 and 1:1.01≤R:B≤1:0.99, which is beneficial to make the effect of the inner glass panel with the low-emissivity layer close to or almost the same as that of using transparent glass. This ensures that when the light provided by the light extraction element entering the vehicle passes through the inner glass panel, there will be no disadvantages such as reducing the richness of ambient light colors, reducing the brightness of ambient light, causing color deviation of ambient light, or causing uneven overall brightness of the lighting / ambient light.

[0124] The inner surface emissivity of the car window glass in Examples 1-6 is less than 0.25, and can reach as low as 0.17. The emissivity of these car window glass is less than or equal to 0.25, which enables the car window glass to have low emissivity. In summer, it can effectively block the heat from the outside of the vehicle from being transferred to the inside of the vehicle, and in winter, it can block the heat from the inside of the vehicle from being lost to the outside, thus achieving the effect of heat insulation in summer and heat preservation in winter.

[0125] The inner surface reflectance color a value of the car window glass in Examples 1-6 satisfies -5≤a≤2 and the b value satisfies -11≤b≤0. When viewed from inside the car, the color of the car window glass is close to a neutral color or a visually comfortable color.

[0126] The visible light reflectivity of the inner surface of the car window glass in Examples 1-6 is less than 4%, and recently approached 2%. This can reduce or even eliminate the phenomenon of obvious reflections of passengers and objects inside the car on the laminated glass due to mirror reflection, avoid visual interference to passengers, especially rear passengers, and improve the passenger experience.

Claims

1. A type of vehicle window glass, characterized in that, The vehicle window glass includes an outer glass panel, an inner glass panel, and an adhesive layer. The outer glass panel includes a first surface and a second surface, the inner glass panel includes a third surface and a fourth surface, and the adhesive layer is located between the second surface and the third surface. The vehicle window glass also includes a low-emissivity layer and a light-emitting element. The low-emissivity layer is disposed on the fourth surface, and the light-emitting element is mounted on the vehicle window glass. The light emitted by the light-emitting element can pass through the fourth surface and the low-emissivity layer. The inner glass plate with the low-emissivity layer has a first transmittance TL1 for the light emitted by the light-emitting element, wherein TL1 ≥ 80%; The emissivity e of the window glass, measured from one side of the fourth surface, is less than 0.

3.

2. The vehicle window glass according to claim 1, characterized in that, The emissivity of the window glass, measured from the fourth surface side, is ≤0.25 or ≤0.

2.

3. The vehicle window glass according to claim 1, characterized in that, The light-emitting element may be disposed on the first surface, or on the second surface, or on the third surface, or between the second surface and the third surface, or on the end face of the outer glass plate.

4. The vehicle window glass according to claim 1, characterized in that, The light-emitting element is disposed on the fourth surface or on the end face of the inner glass panel; the window glass also includes at least one light extraction element, and the light emitted by the light-emitting element passes through the fourth surface and the low-emissivity layer after being transmitted by the light extraction element and enters the interior of the vehicle. The light extraction element is disposed on the second surface, or on the third surface, or between the second surface and the third surface.

5. The vehicle window glass according to claim 1, characterized in that, The TL1 is ≥85%, or the TL1 is ≥90%, or the TL1 is ≥92%.

6. The vehicle window glass according to claim 1, characterized in that, The light emitted by the light-emitting element has a transmitted color RGB value after passing through the fourth surface and the low-emissivity layer, and the RGB value satisfies: R:G≥1 and / or R:B≥1.

7. The vehicle window glass according to claim 6, characterized in that, 1:1.01≤R:G≤1:0.99 and 1:1.01≤R:B≤1:0.

99.

8. The vehicle window glass according to claim 6, characterized in that, 1:1.005≤R:G≤1:0.995, and / or 1:1.005≤R:B≤1:0.

995.

9. The vehicle window glass according to claim 1, characterized in that, The low-emissivity layer includes at least one transparent conductive oxide layer with a total physical thickness of 50 nm to 300 nm. The material of the transparent conductive oxide layer is selected from one or more combinations of doped zinc oxide, indium tin oxide, and fluorine-doped tin oxide. The doped zinc oxide is zinc oxide doped with one or more combinations of aluminum, tungsten, hafnium, gallium, yttrium, niobium, and neodymium.

10. The vehicle window glass according to claim 9, characterized in that, The low-emissivity layer further includes at least two first dielectric layers, each of the transparent conductive oxide layers being located between two adjacent first dielectric layers. The material of the first dielectric layer is selected from one or more combinations of oxides, nitrides, and oxynitrides of Zn, Ti, Si, Al, Sn, Se, Zr, Ni, In, Cr, W, Ca, Y, Nb, Cu, and Sm.

11. The vehicle window glass according to claim 1, characterized in that, The outer glass panel is transparent glass, ultra-transparent glass, or tinted glass; wherein: The total iron content of the transparent glass, calculated as Fe2O3, is less than or equal to 0.1 wt%, and the visible light transmittance of the transparent glass is greater than or equal to 85%. The total iron content of the ultra-transparent glass, calculated as Fe2O3, is less than or equal to 0.015 wt%, and the visible light transmittance of the ultra-transparent glass is greater than or equal to 90%. The tinted glass has a total iron content of 0.9 wt% to 2.2 wt% based on Fe2O3, and the visible light transmittance of the tinted glass is less than 85%. The tinted glass is green glass, gray glass, blue glass, or brown glass.

12. The vehicle window glass according to claim 1, characterized in that, The outer glass panel can be a single pane of glass, insulated glass, vacuum glass, or laminated glass.

13. The vehicle window glass according to claim 1, characterized in that, The visible light transmittance TL2 of the inner glass plate and the visible light transmittance TL3 of the inner glass plate with the low-emissivity layer satisfy the following conditions: TL3 / TL2≥0.95 or TL3 / TL2≥1.

14. The vehicle window glass according to claim 13, characterized in that, The visible light transmittance of the inner glass plate is TL2≥85% or TL2≥90%; the visible light transmittance of the inner glass plate with a low-emissivity layer is TL3≥81%, or TL3≥85%, or TL3≥90%.

15. The vehicle window glass according to claim 1, characterized in that, The haze of the inner glass panel with a low-emissivity layer is less than or equal to 1%. Alternatively, the haze of the inner glass panel with a low-emissivity layer is less than or equal to 0.5%; Alternatively, the haze of the inner glass panel with a low-emissivity layer is less than or equal to 0.3%.

16. The vehicle window glass according to claim 1, characterized in that, The inner glass plate is transparent glass or ultra-transparent glass; The transparent glass has a total iron content of less than or equal to 0.1 wt% based on Fe2O3, and the visible light transmittance of the transparent glass is greater than or equal to 85%. The total iron content of the ultra-transparent glass, calculated as Fe2O3, is less than or equal to 0.015 wt%, and the visible light transmittance of the ultra-transparent glass is greater than or equal to 90%.

17. The vehicle window glass according to claim 1, characterized in that, The adhesive layer is a transparent thermoplastic polymer film or a colored thermoplastic polymer film, and the thickness of the adhesive layer is 0.38 mm to 2.28 mm. The material of the thermoplastic polymer film is selected from one or more combinations of polyvinyl butyral, polyurethane, ethylene-vinyl acetate copolymer, and ionic polymers. The visible light transmittance of the transparent thermoplastic polymer is greater than or equal to 80%. The visible light transmittance of the colored thermoplastic polymer film is less than or equal to 50%, or less than or equal to 20%, or less than or equal to 10%, or less than or equal to 5%.

18. The vehicle window glass according to claim 1, characterized in that, The light-emitting element is selected from at least one of LED, OLED, MicroLED, MiniLED, and EL elements.

19. The vehicle window glass according to claim 4, characterized in that, The light extraction element is selected from at least one of the following: an engraved structure inside the inner glass plate, an engraved structure on the third surface of the inner glass plate, a printed structure on the third surface of the inner glass plate, a film layer on the third surface of the inner glass plate, and a thin film located between the outer glass plate and the inner glass plate.

20. The vehicle window glass according to claim 1, characterized in that, An infrared reflective layer is provided between the outer glass panel and the adhesive layer; and the total solar transmittance of the vehicle window glass is less than or equal to 55%, or less than or equal to 30%, or less than or equal to 20%, or less than or equal to 15%. The infrared reflective layer comprises at least one metal layer and at least two second dielectric layers, wherein the metal layer is located between the two second dielectric layers, and the material of the metal layer is selected from silver, gold, copper, aluminum, platinum, and alloys of two or more of these metals. The material of the second dielectric layer is selected from oxides, nitrides, and oxynitrides containing one or more of Zn, Ti, Si, Al, Sn, Se, Zr, Ni, In, Cr, W, Ca, Y, Nb, Cu, Sm, La, Mg, Ce, Mo, Sb, and Bi.

21. The vehicle window glass according to claim 1, characterized in that, The vehicle window glass also includes a dimming element, the adhesive layer includes a first adhesive layer and a second adhesive layer, the dimming element is disposed between the first adhesive layer and the second adhesive layer, and the dimming element is selected from at least one of polymer dispersed liquid crystal film, suspended particle film, electrochromic film, and dye liquid crystal film.

22. The vehicle window glass according to claim 1, characterized in that, The reflective color a value of the inner surface of the vehicle window glass satisfies -5≤a≤2, and the b value satisfies -11≤b≤0.

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