Laminated glass and projection system

Abstract

The present application provides laminated glass and a projection system. The laminated glass is provided with a light-transmitting area and a shielding area. The visible light transmittance of the light-transmitting area is greater than or equal to 70%, and the visible light transmittance of the shielding area is less than or equal to 3%. At least one display area is arranged in the shielding area. The display area has a P-light reflectance RLp for P-polarized light having a wavelength of 380-780 nm incident at an angle of 65°, and has an S-light reflectance RLs for S-polarized light having a wavelength of 380-780 nm incident at an angle of 65°. A ratio of the P-light reflectance RLp to the S-light reflectance RLs, i.e., RLp / RLs, is greater than 1. The laminated glass and the projection system provided in the present application can not only meet the usage needs of drivers wearing sunglasses and eliminate the visual ghosting phenomenon of displayed images, but also allow a shielding layer to serve as a display background for image display, thereby better blocking external ambient light and avoiding unnecessary interference with a line of sight.

Description

Laminated glass and projection system

[0001] The present disclosure claims priority to the Chinese patent application No. 202410721660.2, filed on June 5, 2024, to the Chinese Patent Office, and entitled "Laminated glass and projection system", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application belongs to the technical field of glass, and in particular relates to laminated glass and projection system. BACKGROUND

[0003] Vehicles can provide various information to drivers and passengers, such as vehicle information, road information, social media information, and even entertainment information, etc. Generally, vehicle heads-up displays (HUD), instrument panels, center screens, co-pilot display screens, and combinations thereof can be used to achieve multi-form, far and near multi-level display requirements, thereby providing drivers and passengers with a more comfortable, safe, intelligent experience and rich information.

[0004] For the display of instrument panels, center screens, etc., the driver needs to look down to observe, and the line of sight of the human eye will temporarily leave the road surface, thereby causing a driving safety hazard. For traditional heads-up displays (HUD), the HUD image is displayed in the light transmission area of the front windshield, and the environment outside the vehicle serves as the display background of the HUD image. The brightness of the environment outside the vehicle and other interfering light will affect the driver's observation of the HUD image, thereby reducing driving safety and visual comfort. SUMMARY

[0005] In view of this, the first aspect of the present application provides a laminated glass, the laminated glass has a light transmission area and a shielding area; the visible light transmittance of the light transmission area is greater than or equal to 70%, and the visible light transmittance of the shielding area is less than or equal to 3%; at least one display area is arranged in the shielding area, the display area has a P light reflectance RLp for P polarized light with a wavelength of 380nm-780nm incident at an incident angle of 65°, the display area has an S light reflectance RLs for S polarized light with a wavelength of 380nm-780nm incident at an incident angle of 65°, and the ratio RLp / RLs of the P light reflectance RLp to the S light reflectance RLs is greater than 1.

[0006] The shielding area includes a bottom shielding area located below the light transmission area, and the display area is located in the bottom shielding area.

[0007] The ratio of the total area of the display area to the area of the bottom shielding area is greater than or equal to 10%.

[0008] The ratio of the total area of the display area to the area of the bottom masking area is 15% to 110%, or 20% to 105%, or 25% to 100%, or 30% to 95%, or 40% to 90%.

[0009] The ratio of the P light reflectivity RLp to the S light reflectivity RLs is RLp / RLs≥1.5, or RLp / RLs≥2, or RLp / RLs≥2.5, or RLp / RLs≥3, or RLp / RLs≥4.

[0010] The P light reflectivity RLp is 30% to 70%, or the P light reflectivity RLp is 40% to 60%.

[0011] The S light reflectivity RLs is ≤25%, or the S light reflectivity RLs is ≤20%, or the S light reflectivity RLs is ≤15%, or the S light reflectivity RLs is ≤10%.

[0012] The display area has a natural light reflectivity RL for natural light having a wavelength of 380 nm to 780 nm incident at an angle of 65°, and the natural light reflectivity RL is ≤35%, or the natural light reflectivity RL is ≤30%, or the natural light reflectivity RL is ≤25%.

[0013] The display area has a reflection color for light emitted by a D65 light source incident at an angle of 65°, and the reflection color has Lab values of a≤0.5 and b≤0.5, or a≤0 and b≤0.

[0014] The laminated glass includes a first glass sheet having a first face and a second face, a second glass sheet having a third face and a fourth face, a bonding layer connecting the second face and the third face, a masking layer disposed in the masking area, and a reflective element disposed in the masking area and covering at least the display area, the masking layer being located between the first glass sheet and the reflective element.

[0015] The masking layer is made of at least one of a dark ink, an opaque polymer film, and a light control film.

[0016] The reflective element is selected from at least one of a high-low refractive index stack, a metal stack, a holographic film, and a stacked polymer film.

[0017] The shielding area includes a bottom shielding area located below the light-transmitting area, the display area is located in the bottom shielding area, the height of the reflective element is greater than or equal to the height of the shielding layer in the bottom shielding area, and the difference between the height of the reflective element and the height of the shielding layer in the bottom shielding area is h, 0≤h≤10mm, or 0≤h≤8mm, or 0≤h≤5mm.

[0018] The shielding area includes a bottom shielding area located below the light-transmitting area, the shielding layer in the bottom shielding area is composed of a first shielding sub-layer and a second shielding sub-layer, the material of the first shielding sub-layer is dark ink, and the material of the second shielding sub-layer is an opaque polymer film or a light-adjusting film.

[0019] The laminated glass further comprises a heat insulation layer selected from at least one of a single-silver nano coating, a double-silver nano coating, a triple-silver nano coating, a quadruple-silver nano coating, an ITO nano coating, an FTO nano coating, and an infrared blocking micron coating, and the total solar energy transmittance of the laminated glass with the heat insulation layer is less than or equal to 55%.

[0020] The transparent glass plate with a thickness of 2.1mm has a visible light transmittance TL0, and the transparent glass plate provided with the reflective element has a visible light transmittance TL1, TL0≥88%, and TL1≤30%.

[0021] The TL1 and the TL0 satisfy: TL1 / TL0≤0.35, or TL1 / TL0≤0.3, or TL1 / TL0≤0.25, or TL1 / TL0≤0.2, or TL1 / TL0≤0.15, or TL1 / TL0≤0.1.

[0022] The laminated glass further comprises an electric heating element and at least two busbars, the busbars are electrically connected with the electric heating element, the electric heating element is a single-silver electric heating coating, or a double-silver electric heating coating, or a triple-silver electric heating coating, or a quadruple-silver electric heating coating, or a five-silver electric heating coating, or a TCO electric heating coating, or a metal wire, or a printed silver paste wire, or a nano-silver wire, or a carbon fiber wire, or a metal mesh, or a graphene heating sheet, and the electric heating element can enable the laminated glass to have a heating power density of at least 400W / m2.

[0023] The reflective element is a high-low refractive index stack arranged on the fourth surface, the high-low refractive index stack includes at least one stack structure, each stack structure includes a high refractive index layer and a low refractive index layer stacked in sequence, the high refractive index layer has a refractive index greater than or equal to 1.8, and the low refractive index layer has a refractive index less than 1.8.

[0024] The high-low refractive index stack is directly arranged on the fourth surface;

[0025] Alternatively, a shielding layer is arranged on the fourth surface, and the high-low refractive index stack is directly arranged on the surface of the shielding layer away from the fourth surface;

[0026] Alternatively, an ultra-thin substrate is arranged on the fourth surface, and the high-low refractive index stack is directly arranged on the surface of the ultra-thin substrate away from the fourth surface, the thickness of the ultra-thin substrate is 0.05mm to 1.0mm, and the material of the ultra-thin substrate is soda-lime glass, or high-aluminum glass, or lithium-aluminum glass, or borosilicate glass, or polyethylene terephthalate, or polycarbonate.

[0027] The layer of the high-low refractive index stack closest to the fourth surface is a high refractive index layer, and the layer of the high-low refractive index stack farthest from the fourth surface is a low refractive index layer; the physical thickness of the low refractive index layer is 80nm to 240nm, or 90nm to 200nm, or 100nm to 180nm.

[0028] The high-low refractive index stack further comprises at least one reflection enhancement layer, the material of the reflection enhancement layer is selected from at least one of the single elements or alloys of Si, Ni, Cr, Al, Ti, Nb, Mo, Sn, Zn, Zr, and Mg, and the total physical thickness of the reflection enhancement layer is greater than 10nm.

[0029] At least one of the reflection enhancement layers is located in at least one of the stack structures.

[0030] The reflection enhancement layer is located between the high refractive index layer and the low refractive index layer of the stack structure.

[0031] The high refractive index layer of the stack structure comprises at least two high refractive index sub-layers, and the reflection enhancement layer is located between two adjacent high refractive index sub-layers.

[0032] The low refractive index layer of the stack structure comprises at least two low refractive index sub-layers, and the reflection enhancement layer is located between two adjacent low refractive index sub-layers.

[0033] The high-low refractive index stack comprises at least two stack structures, and at least one reflection enhancement layer is located between two adjacent stack structures.

[0034] The high-low refractive index stack comprises at least two reflection enhancement layers, and the ratio of the physical thickness of the reflection enhancement layer farthest from the fourth surface to the physical thickness of the reflection enhancement layer closest to the fourth surface is greater than or equal to 2.

[0035] The reflection enhancement layer further comprises at least one of a substoichiometric oxide, nitride, or oxynitride of the single element or the alloy.

[0036] The second aspect of the present application provides a projection system, which comprises a projection device and the laminated glass provided by the first aspect of the present application. The projection device is used to generate projection light, and the projection light comprises at least 80% of P-polarized light. The projection light is incident on at least one display area in the shielding area at an incident angle of 38°-85°, and the display area reflects the projection light to form a display image.

[0037] The laminated glass and the projection system provided by the present application can meet the use requirements of drivers wearing sunglasses and eliminate the visual ghosting phenomenon of the display image. In addition, the shielding layer can be used as a display background for image display, which can better shield external ambient light, avoid unnecessary interference of the line of sight, improve the contrast of the display image and the display background, realize a higher color gamut, and make the image display clearer. Furthermore, the P-polarized light reflection can be enhanced while the S-polarized light reflection is reduced, which can not only enhance the brightness of the projection display, but also improve the energy utilization rate of the projection device, reduce the energy consumption of the projection device, weaken the glare caused by excessively high projection brightness, and reduce the influence of the interference caused by the high visible light reflectance of the dashboard reflection imaging, thereby improving the display effect. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be described below.

[0039] FIG. 1 is a top view of the laminated glass in one embodiment provided by the present application.

[0040] FIG. 2 is a top view of the laminated glass in another embodiment provided by the present application.

[0041] FIG. 3 is a top view of the laminated glass in another embodiment provided by the present application.

[0042] FIG. 4 is a cross-sectional view of the laminated glass provided by the present application.

[0043] FIG. 5 is a partial cross-sectional view of the shielding layer located on the third surface provided by the present application.

[0044] FIG. 6 is a partial cross-sectional view of the shielding layer located on the fourth surface provided by the present application.

[0045] FIG. 7 is a partial cross-sectional view of the shielding layer composed of the first shielding sub-layer and the second shielding sub-layer provided by the present application.

[0046] Fig. 8 is a schematic cross-sectional view of a laminated glass with a thermal insulation layer according to the present application.

[0047] Fig. 9 is a schematic cross-sectional view of a laminated glass with an electric heating element according to the present application.

[0048] Fig. 10 is a schematic cross-sectional view of a reflective element with a single stack structure according to the present application.

[0049] Fig. 11 is a schematic cross-sectional view of a reflective element with two stack structures according to the present application.

[0050] Fig. 12 is a schematic cross-sectional view of a reflective element with a stack structure and a reflection enhancement layer according to the present application.

[0051] Fig. 13 is a schematic cross-sectional view of a reflective element with a stack structure and a reflection enhancement layer according to the present application.

[0052] Fig. 14 is a schematic cross-sectional view of a reflective element with a stack structure and a reflection enhancement layer according to the present application.

[0053] Fig. 15 is a schematic cross-sectional view of a reflective element with a stack structure and a reflection enhancement layer according to the present application.

[0054] Legend: laminated glass 10, light transmission region 101, shading region 102, bottom shading region 1021, left shading region 1022, top shading region 1023, right shading region 1024, display region 103, first glass sheet 11, first face 111, second face 112, adhesive layer 12, second glass sheet 13, third face 131, fourth face 132, shading layer 14, first shading sub-layer 141, second shading sub-layer 142, reflective element 15, reflection enhancement layer 150, first high refractive index layer 151, first low refractive index layer 152, second high refractive index layer 153, second high lower sub-layer 1531, second high upper sub-layer 1532, second low refractive index layer 154, second low lower sub-layer 1541, second low upper sub-layer 1542, third high refractive index layer 155, third low refractive index layer 156, thermal insulation layer 16, electric heating element 17, busbar 18, projection device 20, projection light 201. DETAILED DESCRIPTION

[0055] The following are preferred embodiments of the present application. It should be noted that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the present application.

[0056] Unless otherwise stated or contradictory, the terms or phrases used in the present application have the following meanings:

[0057] In the present application, "first", "second", and the like are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or an implied indication of the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features.

[0058] In the present application, "one or more" refers to any one, any two or any two or more of the listed items. Among them, "several" refers to any two or more.

[0059] The value of x in the chemical formula: it is defined, and the defined range is used as the standard. If it is not defined, it can be determined according to the stoichiometric deposition, sub-stoichiometric deposition or super-stoichiometric deposition in the magnetron sputtering process.

[0060] As shown in FIG. 1, FIG. 2 and FIG. 3, the present application provides a laminated glass 10, which has a light transmission area 101 and a shielding area 102. The shielding area 102 is arranged around the periphery of the light transmission area 101, and the visible light transmittance of the light transmission area 101 is greater than or equal to 70%, so as to facilitate the observation of the environment outside the vehicle by the people inside the vehicle through the light transmission area 101. The visible light transmittance of the shielding area 102 is less than or equal to 3%, so as to play a role of shielding, protection and improving the overall appearance; preferably, the visible light transmittance of the shielding area 102 is less than or equal to 2%, more preferably less than or equal to 1%, further less than or equal to 0.5%, and even almost equal to 0, that is, not transparent.

[0061] The shielding area 102 described in the present application is provided with at least one display area 103, which can display vehicle driving information, various patterns or play videos, etc., and can be used for various scenes such as welcoming, creating atmosphere, watching movies and office work. Optionally, it is used to display driving parameters, including vehicle speed, engine revolutions, fuel consumption, tire pressure, warning information, driving mileage, etc., and can also be used to display weather temperature, entertainment information, and can be used as dynamic navigation, night vision, real scene map, etc. The display area 103 is located in the shielding area 102, and the number of display areas 103 can be one as shown in FIG. 1, or four as shown in FIG. 2, and other numbers such as two, three or even more can be designed according to actual products.

[0062] In FIG. 1, FIG. 2 and FIG. 3, the shielding area 102 includes a bottom shielding area 1021 located below the light transmission area 101, a left shielding area 1022 located on the left side of the light transmission area 101, a top shielding area 1023 located above the light transmission area 101, and a right shielding area 1024 located on the right side of the light transmission area 101. Preferably, the display area 103 is located in the bottom shielding area 1021.

[0063] In order to improve the display effect of the display area 103 and facilitate the observation of the display area 103 by the people in the vehicle, the ratio of the total area of the display area 103 to the area of the bottom shielding area 1021 is preferably greater than or equal to 10%. When the number of the display area 103 is greater than or equal to two, the total area of the display area 103 is equal to the sum of the areas of all the display areas 103. More preferably, the ratio of the total area of the display area 103 to the area of the bottom shielding area 1021 is 15% to 110%, or 20% to 105%, or 25% to 100%, or 30% to 95%, or 40% to 90%, so that the display effect of the display area 103 and the overall aesthetics of the laminated glass 10 can be well balanced. Specifically, the ratio can be 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, 105%, or 110%, etc.

[0064] In FIG. 3, the display area 103 covers the entire bottom shielding area 1021, and even the upper boundary of the display area 103 is closer to the top shielding area 1023 than the upper boundary of the bottom shielding area 1021, i.e., the ratio of the total area of the display area 103 to the area of the bottom shielding area 1021 is 100% to 110%, so as to form a through-type panoramic display effect from the A-pillar to the A-pillar.

[0065] The display area 103 described in the present application has a P light reflectivity RLp for P polarized light with a wavelength of 380 nm to 780 nm incident at an incident angle of 65°, and has an S light reflectivity RLs for S polarized light with a wavelength of 380 nm to 780 nm incident at an incident angle of 65°, and the ratio RLp / RLs of the P light reflectivity RLp to the S light reflectivity RLs is greater than 1, so that the reflectivity of the display area 103 for P polarized light is greater than the reflectivity of the display area 103 for S polarized light, which can not only enhance the reflection of P polarized light to realize projection display, but also reduce the reflection of S polarized light to weaken or even eliminate the instrument table reflection of the display area 103, thereby avoiding interference with the field of view of the people in the vehicle. Preferably, the ratio RLp / RLs of the P light reflectivity RLp to the S light reflectivity RLs is greater than or equal to 1.5, and specifically can be 1.5, 1.8, 2.0, 2.2, 2.5, 2.8, 3.0, 3.3, 3.6, 4.0, 4.5, 5.0, 5.5, 6.0, etc., more preferably RLp / RLs is greater than or equal to 2, further preferably RLp / RLs is greater than or equal to 2.5, more further preferably RLp / RLs is greater than or equal to 3, and even RLp / RLs is greater than or equal to 4.

[0066] As shown in FIG. 4, the laminated glass 10 comprises a first glass plate 11, a bonding layer 12, a second glass plate 13, a shielding layer 14 and a reflective element 15, the bonding layer 12 is arranged between the first glass plate 11 and the second glass plate 13, the shielding layer 14 is arranged in a shielding area 102, the reflective element 15 is arranged in the shielding area 102 and covers at least a display area 103, and the shielding layer 14 is located between the first glass plate 11 and the reflective element 15.

[0067] The projection device 20 is configured to generate a projection light 201, the projection light 201 contains at least 80% of P-polarized light, the projection light 201 is incident on the display area 103 at an incident angle of 38°-85°, and the display area 103 reflects the projection light 201 to form an image that can be observed by a person in the vehicle, in particular, the image can be observed by the driver without bending down, so that the driver's field of view is better and the line of sight is longer for observing the external situation, and at the same time, the driver can more easily obtain the necessary information for auxiliary driving, greatly improving the driving safety, so as to partially or even completely replace the traditional instrument panel, and more even cancel the traditional instrument panel. At the same time, the shielding area 102 is usually referred to as a black border area, and the reflective element 15 is arranged in the shielding area 102 and the shielding layer 14 is located between the first glass plate 11 and the reflective element 15 in the present application, so that the shielding layer 14 can shield the reflective element 15 in the thickness direction of the laminated glass 10, and the shielding layer 14 can be used as a display background of the image display, so as to better shield the external environmental light, avoid unnecessary interference of the line of sight, improve the contrast of the displayed image and the display background, and achieve a higher color gamut, so as to make the image display clearer.

[0068] Specifically, the first glass plate 11 is an outer glass plate of the laminated glass 10, the first glass plate 11 has a first surface 111 and a second surface 112, the first surface 111 is away from the bonding layer 12 and contacts with the external environment, and the second surface 112 is close to the bonding layer 12; the second glass plate 13 is an inner glass plate of the laminated glass 10, the second glass plate 13 has a third surface 131 and a fourth surface 132, the third surface 131 is close to the bonding layer 12, and the fourth surface 132 is away from the bonding layer 12 and contacts with the internal environment; and the bonding layer 12 connects the second surface 112 and the third surface 131.

[0069] The first glass sheet 11 is transparent glass or colored glass, the thickness of the first glass sheet 11 is 0.7mm-4mm, and the visible light transmittance of the first glass sheet 11 is greater than or equal to 80%. The second glass sheet 13 is transparent glass or colored glass, the thickness of the second glass sheet 13 is 0.7mm-4mm, and the visible light transmittance of the second glass sheet 13 is greater than or equal to 80%. The total iron content (calculated as Fe2O3) of the transparent glass is less than or equal to 0.1%, even less than or equal to 0.05%, further less than or equal to 0.01%, and the visible light transmittance of the transparent glass is 80%-95%. The total iron content (calculated as Fe2O3) of the colored glass is 0.1%-0.8%, preferably 0.1%-0.5%, and the visible light transmittance of the colored glass is 80%-90%. For example, the first glass sheet 11 can be transparent glass with a thickness of 2.1mm and a visible light transmittance of 89%, and the second glass sheet 13 can be green glass with a thickness of 1.6mm and a visible light transmittance of 83% or green glass with a thickness of 2.1mm and a visible light transmittance of 80%.

[0070] The adhesive layer 12 is transparent thermoplastic polymer film or colored thermoplastic polymer film, and the thickness of the adhesive layer 12 is 0.38mm-2.28mm. For example, the thickness of the adhesive layer 12 can be, but is not limited to, 0.38mm, or 0.76mm, or 1.14mm, or 1.52mm, or 1.9mm, or 2.28mm, or other values between 0.38mm and 2.28mm. 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). When the adhesive layer 12 is 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 12 can be, but is not limited to, 80%, or 85%, or 90%, or 95%, etc. When the adhesive layer 12 is colored thermoplastic polymer film, the visible light transmittance of the colored thermoplastic polymer film is greater than or equal to 80%. For example, the visible light transmittance of the adhesive layer 12 can be, but is not limited to, 80%, or 85%, or 90%, etc. The colored thermoplastic polymer film can be gray thermoplastic polymer film, green thermoplastic polymer film, or blue thermoplastic polymer film. For example, the adhesive layer 12 can be single-layer structure or multi-layer structure, and the multi-layer structure can be, for example, double-layer structure, triple-layer structure, four-layer structure, five-layer structure, etc. The adhesive layer 12 can also have other functions, such as providing at least one colored area as a shading band to reduce the interference of sunlight on the human eye, or adding infrared absorbers to have sun protection or heat insulation functions, or adding ultraviolet absorbers to have ultraviolet shielding function, or the plasticizer content of at least one layer of the multi-layer structure is higher to have sound insulation function.

[0071] The material of the shielding layer 14 is selected from at least one of a dark ink, an opaque polymer film, and a light-adjustable film.

[0072] The dark ink can be a ceramic ink or a UV ink, which is printed on the second surface 112, the third surface 131, and / or the fourth surface 132 by a process such as screen printing, inkjet printing, etc., and forms the shielding layer 14 after curing or high-temperature sintering; the thickness of the shielding layer 14 formed by the dark ink is 5-40 microns.

[0073] The opaque polymer film can be a bulk-colored polymer film, for example, a black or brown coloring component is added during the manufacturing of the polymer film, etc.; or a polymer film printed with ink, paint, or pigment on the surface, for example, black ink, black paint, or brown pigment is printed on the surface of the polymer film, etc.; or a dyed or colored polymer film, for example, a black or brown dye is used to color the polymer film, etc.; the material of the polymer film can be polyvinyl butyral (PVB), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polycarbonate (PC), polymethyl methacrylate (PMMA), etc.; the opaque polymer film is arranged in the bonding layer 12, for example, the bonding layer 12 can be two pieces of thermoplastic polymer film, and the opaque polymer film is sandwiched between the two pieces of thermoplastic polymer film.

[0074] The light-adjustable film can be a polymer dispersed liquid crystal film (PDLC), a suspended particle film (SPD), an electrochromic film (EC), a dye liquid crystal film (LC), etc. The minimum visible light transmittance of the light-adjustable film is less than or equal to 3%, for example, 3%, 2%, 1%, 0.5%, 0%. In addition, the maximum visible light transmittance of the light-adjustable film is set as needed, for example, 10%, 20%, 30%, 50%, 70%, 80%, etc. Specifically, for example, the visible light transmittance of the light-adjustable film can be adjusted between 0%-20%, between 0.5%-50%, between 0%-70%, etc. The light-adjustable film can meet the requirements of visible light transmittance in multiple scenarios, for example, when black border display is needed, the light-adjustable film is in an opaque state (visible light transmittance is less than or equal to 3%, or even 0%), which improves the contrast between the display image and the display background; when no display is needed, the light-adjustable film is in a transparent state (visible light transmittance is greater than or equal to 70%), which realizes greater area transparency of the vehicle window glass; the light-adjustable film is arranged in the bonding layer 12, for example, the bonding layer 12 can be two pieces of thermoplastic polymer film, and the light-adjustable film is sandwiched between the two pieces of thermoplastic polymer film.

[0075] The reflective element 15 is configured to increase the reflectivity of the display area 103 to P-polarized light and decrease the reflectivity of the display area 103 to S-polarized light. The reflective element 15 can be exemplified by a high-low refractive index stack, a metal stack, a holographic film, a stacked polymer film, or the like. The reflective element 15 can be disposed on the second surface 112, or can be disposed between the second surface 112 and the third surface 131, or can be disposed on the third surface 131, or can be disposed on the fourth surface 132.

[0076] The reflective element 15 is configured to cause the display area 103 to have a P-light reflectivity RLp to P-polarized light having a wavelength of 380 nm-780 nm and an incident angle of 65°, preferably a P-light reflectivity RLp of 30%-70%, for example 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, or the like, more preferably a P-light reflectivity RLp of 40%-60%, so as to enhance the brightness of the projected display, improve the energy utilization of the projection device 20, thereby reducing the energy consumption of the projection device 20, and reduce or even eliminate glare caused by the projection brightness of the projection device 20, which is conducive to the miniaturization and heat dissipation design of the projection device 20.

[0077] The reflective element 15 is configured to cause the display area 103 to have an S-light reflectivity RLs to S-polarized light having a wavelength of 380 nm-780 nm and an incident angle of 65°, preferably an S-light reflectivity RLs less than or equal to 25%, more preferably less than or equal to 20%, further preferably less than or equal to 15%, or even less than or equal to 10%, so as to reduce or even eliminate the dashboard reflection of the display area 103, avoid interference with the field of view of the person inside the vehicle, reduce or even eliminate glare caused by the projection brightness of the projection device 20, and further improve the display effect.

[0078] In view of the fact that the reflective element 15 is configured to increase the reflectivity of the display area 103 to P-polarized light and decrease the reflectivity of the display area 103 to S-polarized light, the reflective element 15 is configured to cause the display area 103 to have a natural light reflectivity RL to natural light having a wavelength of 380 nm-780 nm and an incident angle of 65°, preferably a natural light reflectivity RL less than or equal to 35%, more preferably less than or equal to 30%, further preferably less than or equal to 25%.

[0079] In order to improve the overall aesthetics and high-grade feel of the laminated glass 10 and avoid color cast when the person inside the vehicle observes the display area 103 from inside the vehicle, the Lab value of the reflected color of the display area 103 to natural light having a wavelength of 380 nm-780 nm and an incident angle of 65° measured from the fourth surface 132 side satisfies a≤0.5 and b≤0.5, more preferably a≤0 and b≤0. Further exemplarily, a=-5 to 0 and b=-20 to 0.

[0080] The reflective element 15 can be a high-low refractive index stack, which includes at least one stack structure, each stack structure including high refractive index layers and low refractive index layers stacked in sequence, the high refractive index layers having a refractive index greater than or equal to 1.8, the low refractive index layers having a refractive index less than 1.8, the high-low refractive index stack having a physical thickness of 100 nm to 800 nm, the high refractive index layers and the low refractive index layers being deposited onto the fourth surface 132 by a physical vapor deposition process (PVD), in particular a magnetron sputtering process. The high-low refractive index stack can be composed of only one stack structure of "high refractive index layer / low refractive index layer", or can include at least two stack structures, for example two, three or four stack structures. The material of the high refractive index layers can include oxides or alloy oxides or nitrides or oxynitrides of zirconium (Zr), niobium (Nb), silicon (Si), antimony (Sb), tin (Sn), zinc (Zn), indium (In), aluminum (Al), nickel (Ni), chromium (Cr), magnesium (Mg), manganese (Mn), vanadium (V), tungsten (W), hafnium (Hf), tantalum (Ta), molybdenum (Mo), gallium (Ga), yttrium (Y), bismuth (Bi), titanium (Ti), etc., for example zinc tin oxide (ZnSnOx), titanium oxide (TiOx), niobium oxide (NbOx), silicon nitride (SiNx), silicon aluminum nitride (SiAlNx), silicon zirconium nitride (SiZrNx), etc. In order to better achieve the optical performance, mechanical performance and appearance color of the reflective element 15, which meet the comprehensive requirements of the vehicle window glass, the high refractive index layer can be a single layer structure, or a multi-layer structure including at least two high refractive index sub-layers, the difference between the refractive indices of the two adjacent high refractive index sub-layers being greater than or equal to 0.1. The material of the low refractive index layers can include oxides or alloy oxides or oxynitrides or carbides or fluorides of silicon (Si), aluminum (Al), magnesium (Mg), zirconium (Zr), etc., for example silicon oxide (SiO2), silicon aluminum oxide (SiAlOx), silicon zirconium oxide (SiZrOx), aluminum oxide (Al2O3), magnesium oxide (MgO), magnesium fluoride (MgF), etc. In order to better achieve the optical performance, mechanical performance and appearance color of the reflective element 15, which meet the comprehensive requirements of the vehicle window glass, the low refractive index layer can be a single layer structure, or a multi-layer structure including at least two low refractive index sub-layers.

[0081] The reflective element 15 can be a metal stack, the metal stack comprising at least two dielectric layers and at least one metal layer, each metal layer being located between two adjacent dielectric layers, the physical thickness of the metal stack being 100 nm to 500 nm, the metal layer and the dielectric layer can be deposited to the second surface 112 or the third surface 131 by a physical vapor deposition process (PVD), in particular a magnetron sputtering process. The number of metal layers can be exemplarily 1, 2, 3, 4 or 5, etc., the material of the metal layer is selected from at least one of silver (Ag), gold (Au), copper (Cu) and aluminum (Al), the material of the metal layer is preferably silver or silver alloy. The silver alloy is an alloy of silver and at least one of copper (Cu), gold (Au), platinum (Pt), nickel (Ni), chromium (Cr), titanium (Ti), aluminum (Al), indium (In), zinc (Zn), tin (Sn), the content of silver in the silver alloy is greater than or equal to 90%, preferably greater than or equal to 95%. The material of the dielectric layer is selected from at least one of oxides, nitrides or oxynitrides of Zn, Ti, Si, Al, Sn, Se, Zr, Ni, In, Cr, W, Ca, Y, Nb, Cu, Sm. 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.

[0082] The reflective element 15 can be a holographic film, the holographic (HOE) film refers to a film based on the principle of holographic action, an interference pattern is formed in the holographic film, after the projection light 201 is incident on the holographic film, diffraction occurs under the action of the interference pattern to form an image that can be observed by the person in the vehicle, selecting the holographic film is beneficial to improve the geometric design freedom of the incidence angle of the projection light 201 and is beneficial to weaken or even eliminate ghosting. Preferably, the thickness of the holographic film is preferably 100 μm to 600 μm, which can be exemplarily 100 μm, 120 μm, 150 μm, 180 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 450 μm, 500 μm, 550 μm, 600 μm, etc., and more preferably 50 μm to 300 μm.

[0083] The reflective element 15 can be a laminated polymer film, and the thickness of the laminated polymer film is preferably 20 μm to 500 μm, and can be exemplified by 20 μm, 50 μm, 80 μm, 100 μm, 120 μm, 150 μm, 180 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 450 μm, 500 μm, and the like, and more preferably 50 μm to 300 μm. The laminated polymer film is composed of tens, hundreds or even thousands of resin films with different refractive indexes which are alternately laminated together, and the material of the resin film can be at least one of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), syndiotactic polystyrene (sPS), polybutylene terephthalate (PBT), poly(cyclohexylendimethylene terephthalate) (PCT), polyetherimide (PEI) and polymethacrylimide (PMI). The laminated polymer film can be obtained from the market, for example, from 3M Company, Toray Industries, Inc., Shikoku Chemicals Corporation and Eastman Chemical Company.

[0084] In the present application, the shielding layer 14 in the bottom shielding area 1021 is located between the first glass sheet 11 and the reflective element 15, i.e. the shielding layer 14 in the bottom shielding area 1021 is closer to the first surface 111 than the reflective element 15, and the reflective element 15 is completely located in the bottom shielding area 1021, so that the shielding layer 14 can shield the reflective element 15 and other installation accessories, and can also serve as a display background for the reflective element 15 to form an image.

[0085] In FIG. 4, the shielding layer 14 in the bottom shielding area 1021 is directly arranged on the second surface 112, and the reflective element 15 is directly arranged on the fourth surface 132; as shown in FIG. 5, the shielding layer 14 in the bottom shielding area 1021 is directly arranged on the third surface 131, and the reflective element 15 is directly arranged on the fourth surface 132; as shown in FIG. 6, the shielding layer 14 in the bottom shielding area 1021 is directly arranged on the fourth surface 132, and the reflective element 15 is directly arranged on the surface of the shielding layer 14 away from the fourth surface 132. In FIG. 5, the reflective element 15 is equal to or slightly higher than the shielding layer 14 in the bottom shielding area 1021, that is, the height of the reflective element 15 is greater than or equal to the height of the shielding layer 14 in the bottom shielding area 1021, so as to achieve better visual effect of the laminated glass 10 after being installed on a vehicle, and considering the overall appearance, it is preferred that the difference between the height of the reflective element 15 and the height of the shielding layer 14 in the bottom shielding area 1021 is h, 0≤h≤10mm, or 0≤h≤8mm, or 0≤h≤5mm, and specific examples can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 9.5mm, etc. Among them, the height of the reflective element 15 and the height of the shielding layer 14 in the bottom shielding area 1021 are the heights in the direction from the bottom shielding area 1021 to the top shielding area 1023.

[0086] As shown in FIG. 7, the shielding layer 14 in the bottom shielding area 1021 is composed of a first shielding sub-layer 141 and a second shielding sub-layer 142, the material of the first shielding sub-layer 141 is dark ink, and the material of the second shielding sub-layer 142 is an opaque polymer film or a light-adjustable film, and it is preferred that the second shielding sub-layer 142 is a light-adjustable film, which can better meet the requirements of visible light transmittance in multiple scenes. For example, when image display is required, the light-adjustable film is in an opaque state (visible light transmittance is less than or equal to 3%, or even 0%), so as to improve the contrast of the displayed image and the display background, and when no display is performed, the light-adjustable film is in a transparent state (visible light transmittance is greater than or equal to 70%), so as to realize greater transparency of the laminated glass 10 and improve the field of view of the person inside the vehicle for observing the environment outside the vehicle. Specifically, the first shielding sub-layer 141 is directly arranged on the second surface 112, and the second shielding sub-layer 142 is arranged in the adhesive layer 12; it can be understood that other forms can also be arranged according to actual conditions, for example, the second shielding sub-layer 142 is arranged in the adhesive layer 12, and the first shielding sub-layer 141 is directly arranged on the third surface 131, and for another example, the second shielding sub-layer 142 is arranged in the adhesive layer 12, and the first shielding sub-layer 141 is directly arranged on the fourth surface 132.

[0087] As shown in FIG. 8, the laminated glass 10 described in the present application further comprises a heat insulation layer 16, which can make the laminated glass 10 have excellent heat insulation performance, thereby improving the thermal comfort of the vehicle interior environment, and preferably the total solar energy transmittance of the laminated glass 10 with the heat insulation layer 16 is less than or equal to 55%, more preferably less than or equal to 50%, and even less than or equal to ≤ 45%. The lower the total solar energy transmittance, the better the heat insulation performance of the laminated glass 10. The heat insulation layer 16 can be arranged on the second surface 112, or arranged in the bonding layer 12, or arranged on the third surface 131, or arranged on the fourth surface 132; and preferably the heat insulation layer 16 is not located on the same surface as the reflective element 15.

[0088] The heat insulation layer 16 can be at least one selected from a single silver nano-coating, a double silver nano-coating, a triple silver nano-coating, a quadruple silver nano-coating, an ITO nano-coating, an FTO nano-coating, and an infrared barrier micron-coating.

[0089] The single silver nano-coating, the double silver nano-coating, the triple silver nano-coating, and the quadruple silver nano-coating can be formed by a magnetron sputtering process, and their physical thickness is preferably 100 nm to 500 nm. The single silver nano-coating is a transparent nano-coating with one silver layer and at least two dielectric layers, the double silver nano-coating is a transparent nano-coating with two silver layers and at least three dielectric layers, the triple silver nano-coating is a transparent nano-coating with three silver layers and at least four dielectric layers, and the quadruple silver nano-coating is a transparent nano-coating with four silver layers and at least five dielectric layers. The material of the dielectric 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, and Sm.

[0090] The ITO nano-coating can be formed by a magnetron sputtering process, and the physical thickness of the ITO nano-coating is preferably 100 nm to 500 nm. The ITO nano-coating is a transparent nano-coating with at least one ITO (indium tin oxide) functional layer and at least two dielectric layers, and the material of the dielectric 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, and Sm. The FTO nano-coating can be formed by a chemical vapor deposition process (CVD), and the physical thickness of the FTO nano-coating is preferably 50 nm to 500 nm. The FTO nano-coating is a transparent nano-coating with at least one FTO (fluorine-doped tin oxide) functional layer.

[0091] The infrared blocking micrometer coating can be formed by a sol-gel method, the infrared absorbing micrometer coating has a thickness of 5 μm to 30 μm, the infrared blocking micrometer coating is a transparent micrometer coating with infrared blocking nanoparticles, and the infrared blocking nanoparticles can be made of at least one of ITO (indium tin oxide), FTO (fluorine-doped tin oxide), CWO (cesium-doped tungsten oxide), LaB6 (lanthanum hexaboride), and V2O5 (vanadium pentoxide). The infrared blocking nanoparticles have an average particle size of 20 nm to 100 nm.

[0092] In FIG. 8, the heat insulation layer 16 and the reflective element 15 are not located on the same surface, the projection of the reflective element 15 on the heat insulation layer 16 at least partially overlaps the heat insulation layer 16, and the heat insulation layer 16 is closer to the first surface 111 than the reflective element 15, which facilitates simplifying the production process of the heat insulation layer 16 and the reflective element 15. Specifically, the heat insulation layer 16 is directly arranged on the third surface 131, and the reflective element 15 is directly arranged on the fourth surface 132. The present application can also exemplify the heat insulation layer 16 being directly arranged on the second surface 112 and the reflective element 15 being directly arranged on the fourth surface 132, and the like.

[0093] In other embodiments, the heat insulation layer 16 and the reflective element 15 are not located on the same surface, and the reflective element 15 and the heat insulation layer 16 do not overlap each other in the thickness direction of the laminated glass 10, which can avoid the heat insulation layer 16 reflecting the projection light 201 and interfering with the image formed by the reflective element 15.

[0094] In other embodiments, the heat insulation layer 16 and the reflective element 15 are located on the same surface, and the reflective element 15 and the heat insulation layer 16 do not overlap each other, which can avoid the heat insulation layer 16 reflecting the projection light 201 and interfering with the image formed by the reflective element 15.

[0095] In other embodiments, the heat insulation layer 16 and the reflective element 15 are located on the same surface, and the projection of the reflective element 15 on the heat insulation layer 16 at least partially overlaps the heat insulation layer 16, and the heat insulation layer 16 is closer to the first surface 111 than the reflective element 15. Specifically, the heat insulation layer 16 can be arranged first, and then the reflective element 15 is continuously arranged on the local surface of the heat insulation layer 16.

[0096] In the present application, when the projection of the reflecting element 15 on the thermal insulation layer 16 at least partially overlaps the thermal insulation layer 16, preferably, the transparent glass plate provided with the reflecting element 15 having a thickness of 2.1 mm and a visible light transmittance greater than 88% has a visible light transmittance less than or equal to 30%, which can also be preferably less than or equal to 25%, more preferably less than or equal to 20%, further preferably less than or equal to 15%, more further preferably less than or equal to 10%, even less than or equal to 5%, more even less than or equal to 1%, so as to weaken or even eliminate the interference of the reflection of the projection light 201 by the thermal insulation layer 16 on the image formed by the reflecting element 15, and to save the use of the shielding layer 14 to a certain extent or even partially replace the shielding layer 14, which is conducive to reducing the manufacturing cost of the laminated glass 10.

[0097] As shown in FIG. 9, the laminated glass 10 described in the present application further comprises an electric heating element 17 and at least two bus bars 18, the bus bars 18 are electrically connected with the electric heating element 17, one of the bus bars 18 is electrically connected with the positive pole of a power supply (not shown), and the other bus bar 18 is electrically connected with the negative pole of the power supply (not shown), the current of the power supply is input to the electric heating element 17 through the at least two bus bars 18, so that the electric heating element 17 generates heat to heat the laminated glass 10 to achieve the functions of defrosting, defogging, snow removal or even ice removal, and further improve the driving safety. The electric heating element 17 can be arranged on the second surface 112, the third surface 131, the fourth surface 132 or in the bonding layer 12, and the bus bars 18 are located between the second surface 112 and the third surface 131. The voltage of the power supply described in the present application is 12V to 380V, and the electric heating element 17 can make the laminated glass 10 have a heating power density of at least 400W / m2. Exemplarily, the electric heating element 17 can make the laminated glass 10 have a heating power density of at least 800W / m2. Again exemplarily, the electric heating element 17 can make the laminated glass 10 have a heating power density of at least 1000W / m2. Further exemplarily, the electric heating element 17 can make the laminated glass 10 have a heating power density of at least 2000W / m2.

[0098] The electric heating element 17 can be a single-silver electric heating coating, a double-silver electric heating coating, a triple-silver electric heating coating, a quadruple-silver electric heating coating, a quintuple-silver electric heating coating, a TCO electric heating coating, a metal wire, a printed silver paste wire, a nano-silver wire, a carbon fiber wire, a metal mesh or a graphene heating sheet. The single-silver electric heating coating, the double-silver electric heating coating, the triple-silver electric heating coating, the quadruple-silver electric heating coating, the quintuple-silver electric heating coating and the TCO electric heating coating can be formed by a physical vapor deposition process (PVD) or a chemical vapor deposition process (CVD), and their physical thickness is preferably 100 nm to 500 nm. The single-silver electric heating coating is a transparent nano-coating with one silver layer and at least two dielectric layers, the double-silver electric heating coating is a transparent nano-coating with two silver layers and at least three dielectric layers, the triple-silver electric heating coating is a transparent nano-coating with three silver layers and at least four dielectric layers, the quadruple-silver electric heating coating is a transparent nano-coating with four silver layers and at least five dielectric layers, and the quintuple-silver electric heating coating is a transparent nano-coating with five silver layers and at least six dielectric layers. The TCO electric heating coating is a transparent nano-coating with at least one transparent conductive oxide (TCO) functional layer, the material of the TCO functional layer can be ITO (indium tin oxide), FTO (fluorine-doped tin oxide) or AZO (aluminum-doped zinc oxide), etc., and the TCO electric heating coating can also include at least one dielectric layer. The material of the dielectric 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 and Sm. The metal wire can be at least one of a copper wire, a tungsten wire, an aluminum wire or a copper alloy wire, and the diameter of the metal wire is 0.01 mm-0.5 mm. The printed silver paste wire has a printed line width of 0.1 mm-1.0 mm and a printed thickness of 3 μm-20 μm. The nano-silver wire, the carbon fiber wire, the metal mesh or the graphene heating sheet can be obtained on the market.

[0099] In FIG. 9, the laminated glass 10 described in the present application is additionally provided with a shielding layer 14 on the fourth surface 132, and the reflecting element 15 is arranged on the surface of the additionally provided shielding layer 14 facing away from the fourth surface 132. The additionally provided shielding layer 14 can shield the busbar 18 and other accessories, and can also prevent the projection light 201 from entering the laminated glass 10 and being reflected by the electric heating element 17 to form a ghost image.

[0100] In some embodiments, the reflective element 15 is a high-low refractive index stack arranged on the fourth surface 132, and the projection light 201 is directly incident on the high-low refractive index stack, so that the propagation of the projection light 201 can be avoided from being interfered by other materials. Specifically, the high-low refractive index stack can be directly arranged on the fourth surface 132, or indirectly arranged on the fourth surface 132. For example, the fourth surface 132 is provided with a shielding layer 14, and the high-low refractive index stack is directly arranged on the surface of the shielding layer 14 away from the fourth surface 132. For another example, the fourth surface 132 is provided with an ultra-thin substrate, and the high-low refractive index stack is directly arranged on the surface of the ultra-thin substrate away from the fourth surface 132. The thickness of the ultra-thin substrate is 0.05 mm to 1.0 mm, and can be exemplified as 0.05 mm, 0.08 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc. The material of the ultra-thin substrate can be soda-lime glass, high-alumina glass, lithium-alumina glass, borosilicate glass, polyethylene terephthalate (PET), polycarbonate (PC), or the like.

[0101] When the high-low refractive index stack is directly disposed on the fourth surface 132, as shown in FIG. 10, the high-low refractive index stack can be composed of only one stack structure, i.e., the first high refractive index layer 151 and the first low refractive index layer 152 stacked in sequence; or, as shown in FIG. 11, the high-low refractive index stack is composed of two stack structures, i.e., the first high refractive index layer 151, the first low refractive index layer 152, the second high refractive index layer 153 and the second low refractive index layer 154 stacked in sequence; or, the high-low refractive index stack is composed of three stack structures, i.e., the first high refractive index layer, the first low refractive index layer, the second high refractive index layer, the second low refractive index layer, the third high refractive index layer and the third low refractive index layer stacked in sequence; or, the high-low refractive index stack is composed of four stack structures, i.e., the first high refractive index layer, the first low refractive index layer, the second high refractive index layer, the second low refractive index layer, the third high refractive index layer, the third low refractive index layer, the fourth high refractive index layer and the fourth low refractive index layer stacked in sequence. Preferably, the layer in the reflective element 15 that is in direct contact with the fourth surface 132 is a high refractive index layer, i.e., the first high refractive index layer is in direct contact with the fourth surface 132, and the layer in the reflective element 15 that is farthest from the fourth surface 132 is a low refractive index layer, i.e., the layer in the reflective element 15 that is in contact with air is a low refractive index layer. More preferably, the physical thickness of the low refractive index layer in the reflective element 15 that is farthest from the fourth surface 132 is 80 nm to 240 nm, and specific examples can be 80 nm, 85 nm, 90 nm, 95 nm, 100 nm, 105 nm, 110 nm, 115 nm, 120 nm, 125 nm, 130 nm, 135 nm, 140 nm, 145 nm, 150 nm, 160 nm, 170 nm, 180 nm, 190 nm, 200 nm, 210 nm, 220 nm, 230 nm, 240 nm or a range composed of any two of these values. Alternatively, the physical thickness of the low refractive index layer in the reflective element 15 that is farthest from the fourth surface 132 is 90 nm to 200 nm. Further alternatively, the physical thickness of the low refractive index layer in the reflective element 15 that is farthest from the fourth surface 132 is 100 nm to 180 nm.

[0102] In some other embodiments, as shown in FIG. 12, FIG. 13, FIG. 14 and FIG. 15, the reflective element 15 is a high-low refractive index stack disposed on the fourth surface 132, the high-low refractive index stack comprising at least one stack structure and at least one reflection enhancement layer 150, the material of the reflection enhancement layer 150 being selected from at least one of the group consisting of elemental or alloy of Si (silicon), Ni (nickel), Cr (chromium), Al (aluminum), Ti (titanium), Nb (niobium), Mo (molybdenum), Sn (tin), Zn (zinc), Zr (zirconium), Mg (magnesium), and can be exemplified by crystalline Si, Al, NiCr, etc., the reflection enhancement layer 150 being conducive to improving the reflectivity of the reflective element 15 to P-polarized light and reducing the reflectivity of the reflective element 15 to S-polarized light. Among them, the material of the reflection enhancement layer 150 in the high-low refractive index stack does not contain gold or silver, ensuring that the high-low refractive index stack has excellent properties such as acid resistance, alkali resistance, and abrasion resistance, meeting the requirements of the national standard GB / T 9656, so that the high-low refractive index stack can be applied to the fourth surface 132 of the laminated glass 10, i.e., exposed to air for use. It can be understood that the reflection enhancement layer 150 is manufactured by magnetron sputtering process, and in order to make the reflection enhancement layer 150 better combined with other layers in the high-low refractive index stack, the application can also optionally introduce a small amount of oxygen and / or nitrogen into the sputtering cavity during the magnetron sputtering process of the reflection enhancement layer 150, forming at least one of the oxide, nitride, oxynitride of the element or the alloy, i.e., the reflection enhancement layer 150 also contains at least one of the oxide, nitride, oxynitride of the element or the alloy in a sub-stoichiometric manner, such as NiCr and NiCrOx, or NiCr and NiCrNx, etc., x being determined according to the sub-stoichiometric deposition in the magnetron sputtering process.

[0103] Among them, the total physical thickness of the reflection enhancement layer 150 is greater than 10 nm, and can be exemplified by 11 nm, 15 nm, 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, 45 nm, 50 nm, 55 nm, 60 nm, etc.; preferably, the total physical thickness of the reflection enhancement layer 150 is greater than or equal to 15 nm; further preferably, the total physical thickness of the reflection enhancement layer 150 is 20 nm to 50 nm; which can effectively improve the reflectivity of the reflective element 15 to P-polarized light and reduce the reflectivity of the reflective element 15 to S-polarized light, and is also conducive to simplifying the manufacturing process of the reflection enhancement layer 150.

[0104] In FIG. 12, the reflection enhancement layer 150 is located in at least one stack structure and between a high refractive index layer and a low refractive index layer of the stack structure. Specifically, the reflection element 15 includes one stack structure and one reflection enhancement layer 150, which is located between the first high refractive index layer 151 and the first low refractive index layer 152; or the reflection element 15 includes two stack structures, and the reflection enhancement layer 150 is located between the second high refractive index layer and the second low refractive index layer; or the reflection element 15 includes three stack structures, and the reflection enhancement layer 150 is located between the third high refractive index layer and the third low refractive index layer.

[0105] In FIG. 13, the reflection enhancement layer 150 is located in at least one stack structure and in at least one high refractive index layer, which includes at least two high refractive index sub-layers, and the reflection enhancement layer 150 is located between the adjacent two high refractive index sub-layers. Specifically, the reflection element 15 includes two stack structures and one reflection enhancement layer 150, the two stack structures are the first high refractive index layer 151, the first low refractive index layer 152, the second high refractive index layer 153 and the second low refractive index layer 154, the second high refractive index layer 153 includes two sub-layers, and the reflection enhancement layer 150 is located in the second high refractive index layer 153 and between the two sub-layers, i.e. the reflection enhancement layer 150 is located between the second high lower sub-layer 1531 and the second high upper sub-layer 1532.

[0106] In FIG. 14, the reflection enhancement layer 150 is located in at least one stack structure and in at least one low refractive index layer, which includes at least two low refractive index sub-layers, and the reflection enhancement layer 150 is located between the adjacent two low refractive index sub-layers. Specifically, the reflection element 15 includes two stack structures and one reflection enhancement layer 150, the two stack structures are the first high refractive index layer 151, the first low refractive index layer 152, the second high refractive index layer 153 and the second low refractive index layer 154, the second low refractive index layer 154 includes two sub-layers, and the reflection enhancement layer 150 is located in the second low refractive index layer 154 and between the two sub-layers, i.e. the reflection enhancement layer 150 is located between the second low lower sub-layer 1541 and the second low upper sub-layer 1542.

[0107] In FIG. 15, the reflecting element 15 comprises at least two stack structures, and a reflection enhancement layer 150 is located between two adjacent stack structures. Specifically, the reflecting element 15 comprises three stack structures, i.e., a first high refractive index layer 151, a first low refractive index layer 152, a second high refractive index layer 153, a second low refractive index layer 154, a third high refractive index layer 155, and a third low refractive index layer 156, and two reflection enhancement layers 150, one of which is located between the first low refractive index layer 152 and the second high refractive index layer 153, and the other of which is located between the second low refractive index layer 154 and the third high refractive index layer 155. Alternatively, the reflecting element 15 comprises two stack structures and one reflection enhancement layer 150, and the reflection enhancement layer 150 is located between the two stack structures. Alternatively, the reflecting element 15 comprises four stack structures and two reflection enhancement layers 150. Alternatively, the reflecting element 15 comprises four stack structures and three reflection enhancement layers 150.

[0108] The present application also provides a projection system, which comprises the projection device 20 and the laminated glass 10 provided in the present application, the projection device 20 is used to generate the projection light 201, the projection light 201 comprises at least 80% of P-polarized light, the projection light 201 is incident into at least one display area 103 in the shielding area 102 at an incident angle of 38°-85°, and the display area 103 reflects the projection light 201 to the eyes of the person in the vehicle to form a display image.

[0109] The wavelength of the projection light 201 can be in the range of 380 nm to 780 nm. The projection light 201 can comprise at least 80% of P-polarized light, the higher the proportion of P-polarized light in the projection light 201, the more conducive to meeting the use requirements of the driver wearing sunglasses and the easier to eliminate the visual ghosting phenomenon of the display image. For example, the projection light 201 comprises at least 85% of P-polarized light, or the projection light 201 comprises at least 90% of P-polarized light, or the projection light 201 comprises at least 95% of P-polarized light, or the projection light 201 is 100% of P-polarized light, i.e., the projection light 201 is basically pure P-polarized light.

[0110] The present application also provides a projection system, which comprises the projection device 20 and the laminated glass 10 provided in the present application, the projection device 20 is used to generate the projection light, the projection light 201 comprises at least 80% of P-polarized light, the projection light 201 is incident into at least one display area 103 in the shielding area 102 at an incident angle of 38°-85°, and the display area 103 reflects the projection light 201 to form a display image.

[0111] The projection device 20 of the projection system is installed in the interior of the vehicle body, and the laminated glass 10 of the projection system is installed at the opening of the vehicle body. When the laminated glass 10 is installed on the vehicle, it is preferably used as the front windshield of the vehicle. However, it is not limited thereto, and the laminated glass 10 can also be used as the rear windshield or side window glass, thereby providing more display scene applications for the vehicle.

[0112] In order to make the purposes and advantages of the present application more clear, the effects of the laminated glass of the present application are further described in detail below in combination with specific examples.

[0113] In Comparative Examples 1-4 and Example 1-6, the high-low refractive index stack of the reflective element 15 is exemplified.

[0114] A transparent glass sheet with a thickness of 2.1 mm and a visible light transmittance of 90% is prepared, and the high-low refractive index stacks of Comparative Examples 1-4 and Example 1-6 are deposited on the surface of the transparent glass sheet by a magnetron sputtering process, and the specific film layer materials and physical thicknesses are as follows:

[0115] Comparative Example 1: transparent glass sheet / first high refractive index layer (TiO2 50 nm) / first low refractive index layer (SiO2 190 nm), i.e., Comparative Example 1 does not contain a reflection enhancement layer, and the high-low refractive index stack of Comparative Example 1 is composed of only one stack structure.

[0116] Comparative Example 2: transparent glass sheet / first high lower sub-layer (ZnSnOx 63.6 nm) / first high middle sub-layer (Si3N4 10 nm) / reflection enhancement layer (NiCr 1.3 nm) / first high upper sub-layer (Si3N4 10 nm) / first low refractive index layer (SiO2 106.4 nm), i.e., Comparative Example 2 contains one reflection enhancement layer, and the high-low refractive index stack of Comparative Example 2 is composed of only one stack structure, the first high refractive index layer includes three sub-layers, and the reflection enhancement layer is located between the two adjacent first high refractive index sub-layers.

[0117] Comparative Example 3: transparent glass sheet / first high refractive index layer (TiO2 29.7 nm) / first low refractive index layer (SiO2 99.8 nm) / second high refractive index layer (TiO2 21.9 nm) / second low lower sub-layer (SiO2 100.2 nm) / reflection enhancement layer (NiCr 8.6 nm) / second low upper sub-layer (SiO2 61 nm), i.e., Comparative Example 3 contains one reflection enhancement layer, and the high-low refractive index stack of Comparative Example 3 is composed of two stack structures, the second low refractive index layer includes two sub-layers, and the reflection enhancement layer is located between the two adjacent second low refractive index sub-layers.

[0118] Comparative Example 4: transparent glass sheet / first high lower sublayer (ZnSnOx 23.6 nm) / first reflection enhancement layer (NiCr 11.3 nm) / first high upper sublayer (TiO2 66.5 nm) / second reflection enhancement layer (NiCr 26.4 nm) / first low refractive index layer (SiO2 167.6 nm), i.e. comparative example 4 comprises two reflection enhancement layers, the high / low refractive index stack of comparative example 4 consists of only one stack structure, the first high refractive index layer comprises two sublayers, the first reflection enhancement layer is located between the first high lower sublayer and the first high upper sublayer, the second reflection enhancement layer is located between the first high upper sublayer and the first low refractive index layer.

[0119] Example 1 : transparent glass sheet / first high lower sublayer (ZnSnOx 85.5 nm) / first high upper sublayer (TiO2 71.2 nm) / first low lower sublayer (SiO2 37.3 nm) / reflection enhancement layer (NiCr 16 nm) / first low upper sublayer (SiO2 102.5 nm), i.e. example 1 comprises one reflection enhancement layer, the high / low refractive index stack of example 1 consists of only one stack structure, the first high refractive index layer comprises two sublayers, the first low refractive index layer also comprises two sublayers, the reflection enhancement layer is located between the two adjacent first low refractive index sublayers.

[0120] Example 2: transparent glass sheet / first high refractive index layer (TiO2 29.7 nm) / first low refractive index layer (SiO2 99.8 nm) / second high refractive index layer (TiO2 23.6 nm) / second low lower sublayer (SiO2 110.2 nm) / reflection enhancement layer (NiCr 26.8 nm) / second low upper sublayer (SiO2 102.1 nm), i.e. example 2 comprises one reflection enhancement layer, the high / low refractive index stack of example 2 consists of two stack structures, the second low refractive index layer comprises two sublayers, the reflection enhancement layer is located between the two adjacent second low refractive index sublayers.

[0121] Example 3: transparent glass sheet / first high lower sublayer (ZnSnOx 27.2 nm) / first high upper sublayer (TiO2 29.7 nm) / first low refractive index layer (SiO2 49.1 nm / second high lower sublayer (TiO2 25.3 nm) / reflection enhancement layer (NiCr 28.2 nm) / second high upper sublayer (TiO2 71.4 nm) / second low refractive index layer (SiO2 140.6 nm), i.e. example 3 comprises one reflection enhancement layer, the high / low refractive index stack of example 3 consists of two stack structures, the second high refractive index layer comprises two sublayers, the reflection enhancement layer is located between the two adjacent second high refractive index sublayers.

[0122] Example 4: transparent glass sheet / first high lower sub-layer (TiO2 48.4 nm) / first reflection enhancement layer (NiCr 7.1 nm) / first high upper sub-layer (TiO2 77.1 nm) / first low refractive index layer (SiO2 21.3 nm) / second reflection enhancement layer (NiCr 26.3 nm) / second high refractive index layer (TiO2 4 nm) / second low refractive index layer (SiO2 92.2 nm), i.e. Example 4 contains two reflection enhancement layers, the high-low refractive index stack of Example 4 is composed of two stack structures, the first high refractive index layer includes two sub-layers, the first reflection enhancement layer is located between the first high lower sub-layer and the first high upper sub-layer, and the second reflection enhancement layer is located between the first low refractive index layer and the second high refractive index layer.

[0123] Example 5: transparent glass sheet / first high lower sub-layer (ZnSnOx 23.6 nm) / first reflection enhancement layer (NiCr 11.3 nm) / first high upper sub-layer (TiO2 66.5 nm) / second reflection enhancement layer (NiCr 26.4 nm) / first low refractive index layer (SiO2 108.2 nm), i.e. Example 5 contains two reflection enhancement layers, the high-low refractive index stack of Example 5 is composed of only one stack structure, the first high refractive index layer includes two sub-layers, the first reflection enhancement layer is located between the first high lower sub-layer and the first high upper sub-layer, and the second reflection enhancement layer is located between the first high upper sub-layer and the first low refractive index layer.

[0124] Example 6: transparent glass sheet / first high refractive index layer (TiO2 16.8 nm) / first low refractive index layer (SiO2 72.8 nm) / first reflection enhancement layer (NiCr 12.2 nm) / second high refractive index layer (TiO2 57.7 nm) / second low refractive index layer (SiO2 32 nm) / second reflection enhancement layer (NiCr 29.3 nm) / third high refractive index layer (TiO2 6.9 nm) / third low refractive index layer (SiO2 91.4 nm), i.e. Example 6 contains two reflection enhancement layers, the high-low refractive index stack of Example 6 is composed of three stack structures, the first reflection enhancement layer is located between the first low refractive index layer and the second high refractive index layer, and the second reflection enhancement layer is located between the second low refractive index layer and the third high refractive index layer.

[0125] The transparent glass sheets with film layer structures of Comparative Examples 1 to 4 and Examples 1 to 6 were subjected to high-temperature heat treatment at at least 500°C, and then the visible light transmittance was measured, and the measurement results were tabulated in Table 1.

[0126] Visible light transmittance: measured and calculated according to ISO 9050 in the wavelength range of 380 nm to 780 nm.

[0127] Table 1: Visible light transmittance of the transparent glass sheet with the reflective element of Comparative Examples 1-4 and Example 1-6

[0128] As can be seen from Table 1, the transparent glass sheet with a thickness of 2.1 mm has a visible light transmittance TL0 greater than 88%, and the transparent glass sheet with a thickness of 2.1 mm, a visible light transmittance greater than 88% and provided with the reflective element 15 has a visible light transmittance TL1 less than 80%. Preferably, the transparent glass sheet with a thickness of 2.1 mm, a visible light transmittance greater than 88% and provided with the reflective element 15 of Example 1-6 has a visible light transmittance TL1 less than or equal to 30%. Exemplarily, TL1 is less than or equal to 25%. Yet exemplarily, TL1 is less than or equal to 20%. Further exemplarily, TL1 is less than or equal to 15%. Still further exemplarily, TL1 is less than or equal to 10%. In this way, the interference of the image formed by the reflective element 15 caused by the reflection of the projection light 201 by the heat insulation layer 16 can be weakened or even eliminated, and the use of the shielding layer 14 can be saved to some extent or even partially replaced, which is conducive to reducing the manufacturing cost of the laminated glass 10.

[0129] In some embodiments, TL1 and TL0 satisfy: TL1 / TL0≤0.35; or TL1 / TL0≤0.3; or TL1 / TL0≤0.25; or TL1 / TL0≤0.2; or TL1 / TL0≤0.15; or TL1 / TL0≤0.1.

[0130] Another transparent glass sheet with a thickness of 2.1 mm and a visible light transmittance greater than 88% is prepared, and a black ceramic ink is printed on the surface thereof by a screen printing process, and after high-temperature sintering, the shielding layer 14 is formed;

[0131] Another transparent PVB with a thickness of 0.76 mm is prepared, and the transparent glass sheet with the reflective element of Comparative Examples 1-4 and Example 1-6 is respectively laminated with the transparent PVB and the transparent glass sheet with the shielding layer 14 according to the automobile glass production process, and is subjected to autoclave treatment and the like, and finally the laminated glass 10 with the reflective element of Comparative Examples 1-4 and Example 1-6 is obtained.

[0132] The transparent glass sheet with the shielding layer 14 serves as the outer glass sheet of the laminated glass 10, and the transparent glass sheet with the reflective element of Comparative Examples 1-4 and Example 1-6 serves as the inner glass sheet of the laminated glass 10, the shielding layer 14 is located on the second surface of the laminated glass 10 and forms the shielding area 102, and the reflective element 15 is arranged on the fourth surface of the laminated glass 10 and located in the bottom shielding area 1021, and the reflective element 15 forms the display area 103 in the bottom shielding area 1021.

[0133] The P light reflectance RLp, S light reflectance RLs, natural light reflectance RL, reflection color R4a and reflection color R4b of the laminated glass 10 having the reflective elements of Comparative Examples 1-4 and Examples 1-6 were measured and the measurement results were listed in Table 2.

[0134] P light reflectance RLp: measured and calculated according to standard ISO 9050 from the fourth side, the reflectance of P polarized light with wavelength of 380-780 nm incident at 65° incident angle on the display area;

[0135] S light reflectance RLs: measured and calculated according to standard ISO 9050 from the fourth side, the reflectance of S polarized light with wavelength of 380-780 nm incident at 65° incident angle on the display area;

[0136] Natural light reflectance RL: measured and calculated according to standard ISO 9050 from the fourth side, the reflectance of light emitted by A light source with wavelength of 380-780 nm incident at 8° incident angle on the display area;

[0137] Reflection color R4a: measured and calculated according to CIE 1976 from the fourth side, the a value of reflection color Lab value of light emitted by D65 light source with wavelength of 380-780 nm incident at 65° incident angle on the display area;

[0138] Reflection color R4b: measured and calculated according to CIE 1976 from the fourth side, the b value of reflection color Lab value of light emitted by D65 light source with wavelength of 380-780 nm incident at 65° incident angle on the display area;

[0139] Table 2: Performance parameters of the laminated glass having the reflective elements of Comparative Examples 1-4 and Examples 1-6

[0140] As can be seen from Table 2, the P light reflectance RLp of Comparative Example 1 is less than 10% and the S light reflectance RLs is greater than 40%, so that the ratio of RLp / RLs is far less than 1, and thus only a low-brightness image can be obtained by the projection display on the display area, and if a bright image is to be obtained, the energy consumption of the projection device 20 needs to be greatly increased, which is not conducive to the miniaturization and heat dissipation design of the projection device 20.

[0141] The P light reflectance RLp of Comparative Example 2 is less than 15% and the S light reflectance RLs is less than 5%, although the ratio of RLp / RLs is greater than 3, but only a low-brightness image can be obtained by the projection display on the display area, and if a bright image is to be obtained, the energy consumption of the projection device 20 needs to be greatly increased, which is not conducive to the miniaturization and heat dissipation design of the projection device 20; at the same time, the reflection color R4a of the display area of Comparative Example 2 is greater than 10, and there are obvious disadvantages such as red appearance.

[0142] The P light reflectance RLp of Comparative Example 3 is less than 25% and the S light reflectance RLs is greater than 25%, so that the ratio of RLp / RLs is less than 1, and the brightness of the image obtained by the projection display in the display area is slightly low, and if a bright image is to be obtained, the energy consumption of the projection device 20 still needs to be increased; meanwhile, the reflection color R4b of the display area of Comparative Example 3 is greater than 10, and there are obvious defects such as obvious yellow appearance.

[0143] The P light reflectance RLp of Comparative Example 4 is less than 30% and the S light reflectance RLs is greater than 65%, so that the ratio of RLp / RLs is less than 1, and there are defects such as low P light reflectance and high S light reflectance, resulting in high energy consumption of the projection device, and the natural light reflectance RL is greater than 45%, and further, glare is generated due to the high projection brightness, the dashboard reflection is obvious, and the display effect is reduced.

[0144] The P light reflectance RLp of Comparative Example 4 is less than 30% and the S light reflectance RLs is greater than 65%, so that the ratio of RLp / RLs is less than 1, and there are defects such as low P light reflectance and high S light reflectance, resulting in high energy consumption of the projection device, and the natural light reflectance RL is greater than 45%, and further, glare is generated due to the high projection brightness, the dashboard reflection is obvious, and the display effect is reduced.

[0145] Furthermore, the reflection color R4a≤0 and R4b≤0 of the display area of Examples 1-6 makes the appearance color of the display area observed by the person in the vehicle comfortable. In Examples 4-6, the high-low refractive index stack comprises two reflection enhancement layers, the reflection enhancement layer farthest from the fourth surface is the second reflection enhancement layer, and the reflection enhancement layer closest to the fourth surface is the first reflection enhancement layer, and the physical thickness of the second reflection enhancement layer is greater than the physical thickness of the first reflection enhancement layer, which is conducive to setting the total physical thickness of the reflection enhancement layer to be greater than 30 nm and the film system design of the high-low refractive index stack. Illustratively, the ratio of the physical thickness of the second reflection enhancement layer to the physical thickness of the first reflection enhancement layer is greater than or equal to 1.5. Further illustratively, the ratio of the physical thickness of the second reflection enhancement layer to the physical thickness of the first reflection enhancement layer is greater than or equal to 2. Further illustratively, the ratio of the physical thickness of the second reflection enhancement layer to the physical thickness of the first reflection enhancement layer is greater than or equal to 3.

[0146] The above provides the content of the embodiments of the present application in detail, the principles and embodiments of the present application are described and explained in this paper, and the above description is only used to help understand the method and its core idea of the present application; at the same time, for the general technical personnel in the art, according to the idea of the present application, the specific embodiments and application range will be changed, and the above description should not be understood as the limitation of the present application.

Claims

1. A laminated glass, characterized by, The laminated glass has a light-transmitting region and a shielding region; The visible light transmittance of the light-transmitting region is greater than or equal to 70%, and the visible light transmittance of the shielding region is less than or equal to 3%; At least one display region is arranged in the shielding region, the display region has a P light reflectance RLp for P polarized light with a wavelength of 380 nm-780 nm incident at an incident angle of 65°, and the display region has an S light reflectance RLs for S polarized light with a wavelength of 380 nm-780 nm incident at an incident angle of 65°, and the ratio RLp / RLs of the P light reflectance RLp to the S light reflectance RLs is greater than 1.

2. Laminated glass according to claim 1, characterized in that The shielding region includes a bottom shielding region located below the light-transmitting region, and the display region is located in the bottom shielding region.

3. Laminated glass according to claim 2, characterized in that The ratio of the total area of the display region to the area of the bottom shielding region is greater than or equal to 10%.

4. The laminated glass according to claim 2, wherein The ratio of the total area of the display region to the area of the bottom shielding region is 15%-110%, or 20%-105%, or 25%-100%, or 30%-95%, or 40%-90%.

5. The laminated glass according to claim 1, wherein The ratio RLp / RLs of the P light reflectance RLp to the S light reflectance RLs is greater than or equal to 1.5, or greater than or equal to 2, or greater than or equal to 2.5, or greater than or equal to 3, or greater than or equal to 4.

6. The laminated glass according to claim 1, wherein The P light reflectance RLp is 30%-70%, or the P light reflectance RLp is 40%-60%.

7. The laminated glass according to claim 1, wherein The S light reflectance RLs is less than or equal to 25%, or less than or equal to 20%, or less than or equal to 15%, or less than or equal to 10%.

8. The laminated glass according to claim 1, wherein The display region has a natural light reflectance RL for natural light with a wavelength of 380 nm-780 nm incident at an incident angle of 65°, and the natural light reflectance RL is less than or equal to 35%, or less than or equal to 30%, or less than or equal to 25%.

9. The laminated glass of claim 1, wherein The laminated glass includes a first glass sheet having a first surface and a second surface, a second glass sheet having a third surface and a fourth surface, a bonding layer connecting the second surface and the third surface, a shielding layer arranged in the shielding region, and a reflective element arranged in the shielding region and covering at least the display region, and the shielding layer is located between the first glass sheet and the reflective element.

10. Laminated glass according to claim 9, characterized in that The material of the shielding layer is selected from at least one of a dark color ink, an opaque polymer film, and a light control film.

11. The laminated glass according to claim 9, wherein The reflective element is selected from at least one of a high-low refractive index stack, a metal stack, a holographic film, and a stacked polymer film.

12. The laminated glass of claim 9, wherein The shielding region includes a bottom shielding region located below the light-transmitting region, and the display region is located in the bottom shielding region, the height of the reflective element is greater than or equal to the height of the shielding layer in the bottom shielding region, and the difference between the height of the reflective element and the height of the shielding layer in the bottom shielding region is h, 0≤h≤10 mm, or 0≤h≤8 mm, or 0≤h≤5 mm.

13. The laminated glass of claim 9, wherein The shielding area includes a bottom shielding area located below the light-transmitting area, the shielding layer in the bottom shielding area is composed of a first shielding sub-layer and a second shielding sub-layer, the material of the first shielding sub-layer is dark ink, and the material of the second shielding sub-layer is an opaque polymer film or a light-adjusting film.

14. The laminated glass of claim 9, wherein The laminated glass further comprises a heat insulation layer selected from at least one of a single-silver nano coating, a double-silver nano coating, a triple-silver nano coating, a quadruple-silver nano coating, an ITO nano coating, an FTO nano coating, and an infrared blocking micron coating, and the total solar energy transmittance of the laminated glass with the heat insulation layer is less than or equal to 55%.

15. The laminated glass of claim 9, wherein The transparent glass sheet with a thickness of 2.1 mm has a visible light transmittance TL0, and the transparent glass sheet provided with the reflective element has a visible light transmittance TL1, TL0≥88%, and TL1≤30%.

16. Laminated glass according to claim 15, characterized in that The TL1 and the TL0 satisfy: TL1 / TL0≤0.35, or TL1 / TL0≤0.3, or TL1 / TL0≤0.25, or TL1 / TL0≤0.2, or TL1 / TL0≤0.15, or TL1 / TL0≤0.

1.

17. The laminated glass of claim 9, wherein The laminated glass further comprises an electric heating element and at least two busbars, the busbars are electrically connected with the electric heating element, the electric heating element is a single-silver electric heating coating, or a double-silver electric heating coating, or a triple-silver electric heating coating, or a quadruple-silver electric heating coating, or a five-silver electric heating coating, or a TCO electric heating coating, or a metal wire, or a printed silver paste wire, or a nano-silver wire, or a carbon fiber wire, or a metal mesh, or a graphene heating sheet, and the electric heating element can enable the laminated glass to have a heating power density of at least 400 W / m2.

18. The laminated glass of claim 9, wherein The reflective element is a high-low refractive index stack provided on the fourth surface, the high-low refractive index stack comprises at least one stack structure, each stack structure comprises a high refractive index layer and a low refractive index layer stacked in sequence, the high refractive index layer has a refractive index greater than or equal to 1.8, and the low refractive index layer has a refractive index less than 1.

8.

19. The laminated glass of claim 18, wherein The high-low refractive index stack is directly provided on the fourth surface. Alternatively, a shielding layer is provided on the fourth surface, and the high-low refractive index stack is directly provided on the surface of the shielding layer away from the fourth surface. Alternatively, an ultrathin substrate is provided on the fourth surface, and the high-low refractive index stack is directly provided on the surface of the ultrathin substrate away from the fourth surface, the thickness of the ultrathin substrate is 0.05 mm to 1.0 mm, and the material of the ultrathin substrate is soda-lime glass, or high-alumina glass, or lithium-alumina glass, or borosilicate glass, or polyethylene terephthalate, or polycarbonate.

20. The laminated glass of claim 18, wherein The layer of the high-low refractive index stack closest to the fourth surface is a high refractive index layer, and the layer of the high-low refractive index stack farthest from the fourth surface is a low refractive index layer; the physical thickness of the low refractive index layer is 80 nm to 240 nm, or 90 nm to 200 nm, or 100 nm to 180 nm.

21. The laminated glass of claim 18, wherein The high-low refractive index stack further comprises at least one reflection enhancement layer, the material of the reflection enhancement layer is selected from at least one of the group consisting of Si, Ni, Cr, Al, Ti, Nb, Mo, Sn, Zn, Zr, Mg in a single element or an alloy, the total physical thickness of the reflection enhancement layer is greater than 10 nm.

22. The laminated glass of claim 21, wherein At least one of the reflection enhancement layers is located in at least one of the stack structures.

23. The laminated glass of claim 22, wherein The reflection enhancement layer is located between the high refractive index layer and the low refractive index layer of the stack structure. And / or, the high refractive index layer of the stack structure comprises at least two high refractive index sub-layers, the reflection enhancement layer is located between two adjacent high refractive index sub-layers. And / or, the low refractive index layer of the stack structure comprises at least two low refractive index sub-layers, the reflection enhancement layer is located between two adjacent low refractive index sub-layers.

24. The laminated glass of claim 21, wherein the interlayer is a copolymer of a polyvinyl acetal. The high-low refractive index stack comprises at least two of the stack structures, at least one of the reflection enhancement layers is located between two adjacent stack structures.

25. The laminated glass of claim 21, wherein the interlayer is a copolymer of a polyvinyl acetal. The high-low refractive index stack comprises at least two of the reflection enhancement layers, the ratio of the physical thickness of the reflection enhancement layer farthest from the fourth surface to the physical thickness of the reflection enhancement layer closest to the fourth surface is greater than or equal to 2.

26. The laminated glass of claim 21, wherein The reflection enhancement layer further comprises at least one of sub-stoichiometric oxides, nitrides, oxynitrides of the single element or the alloy.

27. A projection system, characterized by The laminated glass comprises a projection device and a laminated glass according to any one of claims 1-26, the projection device is used to generate projection light, the projection light contains at least 80% P-polarized light, the projection light is incident into at least one display area in the shielding area at an incident angle of 38°-85°, the display area reflects the projection light to form a display image.

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