Laminated glass, display and vehicle

Abstract

Provided in the present application are laminated glass, a display and a vehicle. The laminated glass comprises: outer glass and inner glass, which are stacked, wherein the outer glass comprises a first surface away from the inner glass and a second surface close to the inner glass, and the inner glass comprises a third surface close to the outer glass and a fourth surface away from the outer glass; a bonding layer, which is arranged between the outer glass and the inner glass, so as to bond the outer glass and the inner glass together; a light-shielding layer, which is arranged along an edge of the laminated glass, such that the laminated glass forms a light-transmitting area and a non-light-transmitting area, wherein at least one first display area is provided in the non-light-transmitting area, and the first display area can reflect a projected light ray emitted from a projection assembly and form a first primary image; and a heating element, which is arranged between the outer glass and the inner glass, and can generate heat when powered on. The laminated glass provided in the present application can enable a driver to clearly identify projection information.

Description

Laminated glass, display system and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 8, 2023, with application number 202310992926.2 and application name “Laminated glass, display system and vehicle”. The contents of the above-mentioned prior application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of vehicle technology, and in particular to a laminated glass, a display system and a vehicle. Background Art

[0003] In recent years, head-up display (HUD) systems have been widely used in vehicles to reduce the need for drivers to look down at instrument information, thereby improving driving safety. The HUD on a vehicle consists of a front windshield and a projection component. When the projection component projects light onto the front windshield, the driver can see the projected information. However, in related technologies, when encountering severe weather such as rain or snow, the windshield is easily covered with ice, snow or fog, resulting in the driver being unable to clearly identify the HUD projection information. Simply setting a heating element on the windshield may also cause multiple reflections of the projection light, resulting in the formation of ghosting of the HUD projection image, which affects the driver's ability to clearly identify the HUD projection information.

[0004] Summary of the Invention

[0005] The present application provides a laminated glass, a display system, and a vehicle that enable a driver to clearly identify projected information.

[0006] In a first aspect, the present application provides a laminated glass, comprising:

[0007] Outer glass and inner glass are stacked, the outer glass includes a first surface away from the inner glass and a second surface close to the inner glass, and the inner glass includes a third surface close to the outer glass and a fourth surface away from the outer glass;

[0008] an adhesive layer, the adhesive layer being provided between the outer glass and the inner glass to bond the outer glass and the inner glass together;

[0009] a light-shielding layer disposed along an edge of the laminated glass so as to form a light-transmitting area and a non-light-transmitting area in the laminated glass, wherein the non-light-transmitting area has at least one first display area capable of reflecting projection light emitted by the projection assembly and forming a first main image; and

[0010] A heating element is provided between the outer glass and the inner glass, and can generate heat when powered on.

[0011] The light-shielding layer includes a first light-shielding layer, the first light-shielding layer is arranged on the second surface, the heating element is arranged between the adhesive layer and the second surface, or the heating element is arranged between the adhesive layer and the third surface.

[0012] The laminated glass further includes an anti-reflection film, which is disposed on the fourth surface and at least partially covers the first display area. The anti-reflection film is used to increase the reflectivity of the first display area to P-polarized light.

[0013] There is at least one second display area in the light-transmitting area, and the second display area can reflect the projection light emitted by the projection component and form a second main image.

[0014] Wherein, the laminated glass further includes an anti-reflection film, the anti-reflection film at least partially covers the second display area, and the anti-reflection film is used to increase the reflectivity of the second display area to P-polarized light.

[0015] The shading layer includes a second shading layer, the second shading layer is arranged on the third surface or the fourth surface, the second shading layer at least covers the first display area, and the heating element is arranged between the second shading layer and the second surface.

[0016] In which, there is at least one second display area in the light-transmitting area, and the second display area can reflect the projection light emitted by the projection assembly and form a second main image. The laminated glass also includes an anti-reflection film, which is arranged on the fourth surface and at least partially covers the second display area. The anti-reflection film is used to increase the reflectivity of the second display area to P-polarized light.

[0017] The reflectivity of the first display area to P-polarized light is greater than or equal to 10%, and / or there is at least one second display area in the light-transmitting area, and the reflectivity of the second display area to P-polarized light is greater than or equal to 10%.

[0018] The heating element is a transparent conductive film, which includes at least one of a metal layer, a metal alloy layer, or a metal oxide layer. The metal layer includes at least one of gold (Au), silver (Ag), copper (Cu), aluminum (Al), or molybdenum (Mo). The metal alloy layer includes a metal alloy composed of silver and at least one of copper (Cu), gold (Au), palladium (Pd), tin (Sn), zinc (Zn), lead (Pb), and nickel (Ni). The metal oxide layer includes at least one of indium tin oxide, fluorine-doped tin dioxide, aluminum-doped tin dioxide, gallium-doped tin dioxide, boron-doped tin dioxide, tin-zinc oxide, or antimony-doped tin oxide.

[0019] Wherein, the heating element is an electric heating wire;

[0020] The electric heating wire is an enameled wire, the inner layer of the enameled wire is a conductive material, and the outer layer is an insulating material;

[0021] Alternatively, the electric heating wire is a tungsten wire;

[0022] Alternatively, the electric heating wire is a metal copper wire.

[0023] Wherein, the laminated glass further includes a first busbar and a second busbar arranged between the outer glass and the inner glass, the first busbar and the second busbar are arranged in the non-light-transmitting area, the first busbar and the second busbar are arranged at intervals and are both electrically connected to the heating element, and when the first busbar and the second busbar are energized, the heating element can generate heat.

[0024] Wherein, the adhesive layer is a thermoplastic polymer film with a wedge angle in the range of 0.1 mrad to 1.0 mrad.

[0025] In a second aspect, the present application further provides a head-up display system, which includes a projection component and laminated glass, wherein the projection component is used to emit projection light toward the laminated glass.

[0026] Wherein, the projection light includes P-polarized light and / or S-polarized light.

[0027] In which, the projection assembly includes a first projection assembly and a second projection assembly, there is at least one first display area in the non-light-transmitting area of ​​the laminated glass, and there is at least one second display area in the light-transmitting area of ​​the laminated glass, the first projection assembly is used to project light onto the first display area and form a first main image, and the second projection assembly is used to project light onto the second display area and form a second main image.

[0028] Wherein, the incident angle of the projection light emitted by the projection assembly toward the laminated glass on the laminated glass is 40° to 80°.

[0029] Wherein, the horizontal viewing angle HFOV of the projection light emitted by the projection assembly toward the laminated glass is 0° to 50° in the horizontal direction.

[0030] The image formed by the projection light emitted by the projection assembly on the laminated glass has a color difference with the laminated glass. in, is the brightness difference between the color of the image formed by the projection light on the laminated glass and the color of the laminated glass, is the green-red chroma difference between the color of the image formed by the projection light on the laminated glass and the color of the laminated glass, It is the blue-yellow chroma difference between the color of the projection light and the color of the laminated glass.

[0031] The color difference δE* between the projection light emitted by the projection assembly and the non-light-transmitting area of ​​the laminated glass is ≥19.9.

[0032] In a third aspect, the present application further provides a vehicle, comprising a vehicle frame and a head-up display system, wherein the head-up display system is carried by the vehicle frame.

[0033] In the laminated glass provided in this application, since a heating element is provided, when the laminated glass is covered with frost, snow, or fog, the heating element can be energized to generate heat, thereby achieving the functions of defrosting, removing snow, and defogging, allowing the driver to clearly see the first main image. At the same time, since the heating element is located between the outer glass and the inner glass, heat can quickly reach the outer and inner glass, whether the vehicle is fogged inside or covered with frost and snow outside, both can be quickly removed. Furthermore, when the projection light shines on the first display area, because the first light-shielding layer acts as an opaque background, there is a high contrast between the first main image and the first light-shielding layer, allowing the driver to more clearly discern the projected information contained in the first main image. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] FIG1 is a schematic diagram of a vehicle provided in an embodiment of the present application.

[0036] FIG2 is a schematic diagram of a head-up display system provided in an embodiment of the present application.

[0037] FIG3 is a schematic diagram of a head-up display system provided in an embodiment of the present application.

[0038] FIG4 is a schematic diagram of a head-up display system provided in another embodiment of the present application.

[0039] FIG. 5 is a partial schematic diagram of the laminated glass in the head-up display system shown in FIG. 4 .

[0040] FIG6 is a front view of a laminated glass provided in an embodiment of the present application.

[0041] FIG7 is a front view of a laminated glass provided in another embodiment of the present application.

[0042] FIG8 is a front view of a laminated glass provided in another embodiment of the present application.

[0043] FIG9 is a schematic diagram of a head-up display system provided in yet another embodiment of the present application.

[0044] FIG10 is a partial schematic diagram of the laminated glass in the head-up display system shown in FIG9 . DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] References herein to "embodiments" or "implementations" mean that a particular feature, structure, or characteristic described in connection with the embodiments or implementations may be included in at least one embodiment of the present application. The appearance of such phrases in various places in the specification does not necessarily refer to the same embodiment, nor do they constitute independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] Referring to FIG1 , the present application provides a vehicle 1 , which may be, but is not limited to, a sedan, a multi-purpose vehicle (MPV), a sport / suburban utility vehicle (SUV), an off-road vehicle (ORV), a pickup truck, a van, a bus, a truck, etc.

[0048] The vehicle 1 includes a frame 20 and a head-up display (HUD) system 10, which is directly or indirectly supported by the frame 20. The frame 20 is a framework used to support and connect the various assemblies of the vehicle 1, maintaining their relative position and bearing various loads inside and outside the vehicle 1. The head-up display system 10 may also be referred to as a head-up display system.

[0049] Referring to FIG. 2 , the present application also provides a head-up display system 10, comprising a projection assembly 120 and laminated glass 110. The projection assembly 120 may also be referred to as a picture generation unit (PGU). The PGU is used to output images. The number of projection assemblies 120 may be one, two, or more. The laminated glass 110 may be used for a vehicle's front windshield, with the visible light transmittance of the light-transmitting area 200 being ≥70. The projection assembly 120 can reflect instrument signals, such as vehicle speed and navigation information, onto the laminated glass 110 via an aspherical mirror. After reflection from the laminated glass 110, the signals enter the eye box (EB). In other words, the projection assembly 120 is used to project information, such as vehicle speed and navigation, onto the laminated glass 110 in the form of light, i.e., the projection assembly 120 is used to generate projection light. The laminated glass 110 is used to reflect the projection light into the eye box EB, allowing the driver to see the projected information, such as vehicle speed and navigation.

[0050] The projection light includes P-polarized light and / or S-polarized light, that is, the projection light can be P-polarized light, or S-polarized light, or P-polarized light and S-polarized light can exist simultaneously.

[0051] Referring to Figures 2 and 3 , the projection assembly 120 includes a first projection assembly 121 and a second projection assembly 122. The non-light-transmitting area A2 of the laminated glass 110 includes at least one first display area, and the light-transmitting area A1 of the laminated glass 110 includes at least one second display area. The first projection assembly 121 is configured to project light onto the first display area to form a first primary image, while the second projection assembly 122 is configured to project light onto the second display area to form a second primary image.

[0052] Specifically, the path of the projection light emitted by the first projection assembly 121 is different from the path of the projection light emitted by the second projection assembly 122, resulting in different positions of the first and second main images as seen by the human eye. It should be noted that the first and second projection assemblies 121, 122 can be connected as a single unit or separated and independent from each other. During operation, only the first projection assembly 121 can emit projection light, and the human eye can only see the first main image; or only the second projection assembly 122 can emit projection light, and the human eye can only see the second main image; or both the first and second projection assemblies 121, 122 can emit projection light, and the human eye can see both the first and second main images simultaneously. The displayed content of the first and second main images can be the same or different.

[0053] The number of first display areas can be 1, 2, 3, 5, etc. When there are multiple first display areas, the multiple first display areas can be spaced apart from each other or at least partially connected. Similarly, the number of second display areas can be 1, 2, 3, 5, etc. When there are multiple second display areas, the multiple second display areas can be spaced apart from each other or at least partially connected.

[0054] Optionally, the incident angle of the projection light emitted by the projection assembly 120 onto the laminated glass 110 on the laminated glass 110 is 40° to 80°, for example, 40°, 45°, 50°, 61°, 75°, 80°, etc. In certain further embodiments, the incident angle of the projection light emitted by the projection assembly 120 onto the laminated glass 110 on the laminated glass 110 is 45° to 75°. In certain further embodiments, the incident angle of the projection light emitted by the projection assembly 120 onto the laminated glass 110 on the laminated glass 110 is 50° to 60°. In certain ideal embodiments, the incident angle of the projection light emitted by the projection assembly 120 onto the laminated glass 110 on the laminated glass 110 is the Brewster angle.

[0055] Optionally, the horizontal viewing angle HFOV of the projection light emitted by the projection assembly 120 to the laminated glass 110 in the horizontal direction is 0°~50°, for example, 10°, 20°, 31°, 42°, 50°, etc., and the angle is preferably 0°~35°. The smaller the angle value, the better the projection imaging effect.

[0056] Optionally, the image formed on the laminated glass 110 by the projection light emitted by the projection assembly 120 has a color difference with the laminated glass 110. in, is the brightness difference between the color of the image formed by the projection light on the laminated glass 110 and the color of the laminated glass 110, is the green-red chromaticity difference between the color of the image formed by the projection light on the laminated glass 110 and the color of the laminated glass 110, It is the blue-yellow chroma difference between the color of the image formed by the projection light on the laminated glass 110 and the color of the laminated glass 110 .

[0057] Optionally, the color difference between the image formed on the laminated glass 110 by the projection light emitted by the projection assembly 120 and the non-light-transmitting area A2 of the laminated glass 110 is For example, δE* can be 19.9, 20, 21, 25, 30, 35, 41, 46, etc. Further, the color difference between the projection light emitted by the projection assembly 120 and the non-transparent area A2 of the laminated glass 110 is

[0058] Specifically, the human eye uses lightness and chroma in the CIELAB color space to determine color. The International Commission on Illumination (CIE) 1976 uses L* to represent lightness, and a* (green and red) and b* (blue and yellow) to represent chroma. The color difference between two colors can be expressed as δE*, which can be expressed using the formula: δE* = ((δL* / 2)² + (δa*)² + (δb*)²). 0.5 , where δL* is the lightness difference between the two colors, δa* is the green-red chroma difference between the two colors, and δb* is the blue-yellow chroma difference between the two colors. The smaller the δE* value, the closer the two colors are and the harder it is to distinguish; conversely, the larger the δE* value, the less similar the two colors are and the easier it is to distinguish. Taking the first display area as an example, if the non-transparent area A2 is black, when the pattern color of the projection light emitted by the projection assembly 120 is white, δE* = 47.5; when the pattern color of the projection light emitted by the projection assembly 120 is red, δE* = 106; and when the pattern color of the projection light emitted by the projection assembly 120 is gray, δE* = 19.9. It can be understood that the larger the δE*, the higher the clarity of the first main image that the human eye can recognize. It should be noted that in the above formula, the color difference δE* uses half of the lightness difference (i.e., δL* / 2) as the calculation item of the lightness difference. Compared with directly using δL* for calculation, this can reduce the influence weight of the lightness difference on the color difference.

[0059] In related technologies, when the outer surface of the laminated glass is covered with ice and snow, the driver's field of vision is affected and the HUD projected image cannot be clearly recognized by the driver; when it rains and the inner surface of the laminated glass fogs up, the projected image displayed in the black block area at the bottom edge is covered by fog, and the driver cannot clearly recognize the image; when the environment is humid and the temperature difference between the inside and outside of the car is relatively large, the bottom edge area of ​​the laminated glass is prone to fogging, making the image in this area difficult to recognize.

[0060] Based on this, the present application hopes to provide a solution that can solve but is not limited to the above technical problems, the details of which will be explained in subsequent embodiments.

[0061] 4 to 5 , the present application further provides a laminated glass 110 , which is used to form a main image according to the projection light emitted by the projection assembly 120 . The laminated glass 110 includes: outer glass 111 , inner glass 115 , an adhesive layer 114 , a light-shielding layer 112 and a heating element 113 .

[0062] The outer glass 111 and the inner glass 115 are stacked, the outer glass 111 includes a first surface M1 away from the inner glass 115 and a second surface M2 close to the inner glass 115, and the inner glass 115 includes a third surface M3 close to the outer glass 111 and a fourth surface M4 away from the outer glass 111.

[0063] The adhesive layer 114 is disposed between the outer glass 111 and the inner glass 115 to bond the outer glass 111 and the inner glass 115 together.

[0064] The light-shielding layer 112 is arranged along the edge of the laminated glass 110 so that the laminated glass 110 forms a light-transmitting area A1 and a non-light-transmitting area A2. The non-light-transmitting area A2 has at least one first display area, and the first display area can reflect the projection light emitted by the projection assembly 120 and form a first main image.

[0065] The heating element 113 is disposed between the outer glass 111 and the inner glass 115 , and can generate heat when powered on.

[0066] Specifically, the laminated glass 110 is a laminated structure in which outer glass 111, adhesive layer 114, light-shielding layer 112, heating element 113, and inner glass 115 are laminated together. The laminated structure can realize functions such as light transmission, heating, and projection.

[0067] The outer glass 111 has a first surface M1 and a second surface M2 that are opposite to each other. The inner glass 115 has a third surface M3 and a fourth surface M4 that are opposite to each other. The third surface M3 is arranged opposite to the second surface M2. The heating element 113 is arranged between the second surface M2 and the third surface M3. The laminated glass 110 has a first side and a second side that are opposite to each other. The first side is the side with the first surface M1, and the second side is the side with the fourth surface M4. The first surface M1 faces the outside of the vehicle, and the fourth surface M4 faces the inside of the vehicle. Therefore, from the perspective of the vehicle 1, the first side can be understood as the outside of the laminated glass 110, and the second side is the inside of the laminated glass 110. The projection assembly 120 is installed inside the vehicle 1 and is used to emit projection light from the second side to the laminated glass 110.

[0068] The light-shielding layer 112 is made of a non-light-transmitting material. The light-shielding layer 112 is arranged at the edge of the laminated glass 110, that is, the light-shielding layer 112 can be roughly in the shape of an annular square frame. In addition, the light-shielding layer 112 can partially extend toward the central area of ​​the laminated glass 110 at certain positions to shield the corresponding area. The light layer 112 can also be disconnected at certain positions to form a discontinuous state. The light-shielding layer 112 forms a non-light-transmitting area A2 on the laminated glass 110, and the area on the laminated glass 110 where the light-shielding layer 112 does not exist is the light-transmitting area A1. The non-light-transmitting area A2 is not transparent to light, while the light-transmitting area A1 is transparent to light. The heating element 113 is made of a conductive material and can generate heat when energized. There is at least one first display area in the non-light-transmitting area A2, and the first display area can reflect the projection light emitted from the projection assembly 120 to form a first main image. Since the first display area is located in the non-light-transmitting area A2, the first light-shielding layer 1121 in the non-light-transmitting area A2 can serve as the background and substrate of the first main image. The first main image and the first light-shielding layer 1121 can form a sharp contrast, which can make the first main image more prominent, so that the driver can more easily and clearly distinguish the content of the first main image.

[0069] Among them, the type of the heating element 113 can be a transparent conductive film 113a (as shown in Figure 6), and the transparent conductive film 113a is in the form of a thin film sheet. The heating element 113 can also be an electric heating wire 113b (as shown in Figures 7 and 8), and the electric heating wire 113b is in the form of a wire strip. The heating element 113 will be described in detail later and will not be described in detail here. In addition, the heating element 113 can be arranged on the entire laminated glass 110, or it can be arranged in a partial area on the laminated glass 110, wherein the heating element 113 may not overlap with the first display area and / or the second display area, and further, the heating element 113 preferably overlaps with the first display area and / or the second display area at least partially. In addition, in some specific embodiments, as shown in Figure 7, the heating element 113 is at least partially arranged in the entire non-light-transmitting area, or as shown in Figure 8, the heating element 113 is arranged only in the non-light-transmitting area.

[0070] In the laminated glass 110 provided in the present application, since a heating element 113 is provided, when the laminated glass 110 is covered with frost, snow, or fog, the heating element 113 can be energized to generate heat, thereby achieving the functions of defrosting, removing snow, and defogging, so that the driver can clearly see the first main image. At the same time, since the heating element 113 is provided between the outer glass 111 and the inner glass 115, heat can quickly reach the outer glass 111 and the inner glass 115, whether the vehicle is fogged inside or covered with frost and snow outside, it can be quickly removed. For the heating element 113, it is preferred to heat for 20 minutes to achieve a defrost degree of more than 80%; it is more preferred to heat for 12 minutes to achieve a defrost degree of more than 80%; and it is most preferred to heat for 5 minutes to achieve a defrost degree of more than 80%. Furthermore, when the projection light is irradiated onto the first display area, since the first light shielding layer 1121 serves as an opaque background, there is a high contrast between the first main image and the first light shielding layer 1121 , thereby enabling the driver to more clearly identify the first main image.

[0071] Optionally, referring to Figures 4 and 5 , the light-shielding layer 112 includes a first light-shielding layer 1121, which is disposed on the second surface M2. The heating element 113 is disposed between the adhesive layer 114 and the second surface M2, or between the adhesive layer 114 and the third surface M3. In other words, the heating element 113 can be disposed between the outer glass 111 and the adhesive layer 114, or between the adhesive layer 114 and the inner glass 115. In this case, the heating element 113 can be an electric heating wire 113b. In this case, the projection light projected onto the first display area can be either P-polarized light or S-polarized light, with S-polarized light being preferred.

[0072] Optionally, referring to Figures 4 and 5 , the laminated glass 110 further includes an anti-reflective film 116 disposed on the fourth surface M4 and at least partially covering the first display area. The anti-reflective film 116 is configured to increase the reflectivity of the first display area for P-polarized light. In this embodiment, the projection light illuminating the first display area can be P-polarized light. Because the anti-reflective film 116 covering the first display area enhances the reflection of P-polarized light, the display clarity of the first main image can be improved. In this case, the heating element 113 can be a transparent conductive film 113a.

[0073] Optionally, referring to Figures 4 and 5 , at least one second display area is included within the light-transmitting area A1. This second display area is capable of reflecting the projection light emitted by the projection assembly 120 and forming a second main image. In this embodiment, since the second main image is reflected from the second display area, the second main image and the first main image do not interfere with each other. The second main image and the first main image can be projected and displayed simultaneously, thereby displaying more projection content. Of course, during projection, only one of the first and second main images can be displayed.

[0074] Optionally, referring to Figures 4 and 5 , the laminated glass 110 further includes an anti-reflection film 116, which partially covers the second display area. The anti-reflection film 116 is configured to increase the reflectivity of the second display area for P-polarized light. In this embodiment, the projection light illuminating the second display area can be P-polarized light. Because the anti-reflection film 116 covering the second display area enhances the reflection of P-polarized light, the clarity of the second primary image can be improved.

[0075] It should be noted that when the projection light illuminates the laminated glass 110, regardless of whether it illuminates the first display area or the second display area, at least part of the light will enter the laminated glass 110. If the projection light reaches the heating element 113 (the type of the heating element 113 is a transparent conductive film 113a), this part of the light will be reflected by the heating element 113 and enter the human eye, causing the human eye to see, in addition to the main image, a virtual image reflected by the heating element 113 that does not overlap or does not completely overlap with the main image. That is, the human eye will see double images, resulting in an unclear projected image seen by the driver.

[0076] Optionally, referring to Figures 9 and 10, the light-shielding layer 112 includes a second light-shielding layer 1122, which is disposed on the third surface M3 or the fourth surface M4. The second light-shielding layer 1122 covers at least the first display area, and the heating element 113 is disposed between the second light-shielding layer 1122 and the second surface M2. In other words, the heating element 113 is located between the outer glass 111 and the second light-shielding layer 1122. In this embodiment, the heating element 113 is disposed between the outer glass 111 and the second light-shielding layer 1122. The projection light is blocked by the second light-shielding layer 1122 and cannot reach the heating element 113. This avoids the problem of double images in the first display area caused by reflection of the projection light by the heating element 113 when the transparent conductive film 113a is used as the heating element 113, and the driver can clearly see the first main image. In addition, the heating element 113 may also be disposed between the adhesive layer 114 and the second light shielding layer 1122 . Furthermore, when the second light shielding layer 1122 is disposed on the fourth surface M4 , the heating element 113 may also be disposed on the third surface M3 .

[0077] Optionally, the first light-shielding layer 1121 and the second light-shielding layer 1122 may exist at the same time, or there may be only the first light-shielding layer 1121 or only the second light-shielding layer 1122. Please refer to Figure 3. The first light-shielding layer 1121 is connected to the second surface M2, and the second light-shielding layer 1122 is connected to the third surface M3. The heating element 113 is arranged between the first light-shielding layer 1121 and the second light-shielding layer 1122.

[0078] Optionally, referring to Figures 9 and 10 , the light-transmitting area A1 includes at least one second display area. The second display area is capable of reflecting projection light emitted by the projection assembly 120 and forming a second primary image. The laminated glass 110 further includes an anti-reflection film 116 disposed on the fourth surface M4 and at least partially covering the second display area. The anti-reflection film 116 is configured to increase the reflectivity of the second display area for P-polarized light. In this embodiment, the projection light illuminating the second display area can be P-polarized light. Since the anti-reflection film 116 covering the second display area enhances the reflection of P-polarized light, the display clarity of the second primary image can be improved.

[0079] For the first display area, the projection light can be S-polarized light and / or P-polarized light. When the first display area is not provided with an anti-reflection film 116, S-polarized light can be used to display the first main image more clearly. When the first display area is provided with an anti-reflection film 116, P-polarized light can be used to display the first main image more clearly.

[0080] For the second display area, the projection light can be S-polarized light and / or P-polarized light. When the first display area is not provided with the anti-reflection film 116, S-polarized light can be used to display the first main image more clearly. When the first display area is provided with the anti-reflection film 116, P-polarized light can be used to display the first main image more clearly.

[0081] Several feasible structural forms are introduced below in combination with the types of heating elements 113.

[0082] In one embodiment, if the heating element 113 is a transparent conductive film 113a, the transparent conductive film 113a is disposed on the second surface M2, and the light shielding layer 112 is located on the second surface M2, forming a projection in the non-transparent area A2; at this time, if the projected light is P-polarized light, it is necessary to set an anti-reflection film 116 in the first display area to improve the display clarity of the first main image in the non-transparent area A2.

[0083] In another embodiment, if the heating element 113 is an electric heating wire, the electric heating wire can be arranged on the third surface M3, and the shading layer 112 is arranged on the second surface M2 to form a projection in the non-light-transmitting area A2; at this time, if the projection light is S-polarized light, there is no need to set a reflection-enhancing film 116 in the first display area, and a clear first main image can be seen in the first display area; if the projection light is P-polarized light, it is necessary to set an reflection-enhancing film 116 in the first display area to improve the display clarity of the first main image in the non-light-transmitting area A2.

[0084] In another embodiment, the heating element 113 is a transparent conductive film 113a. Because the transparent conductive film 113a can also reflect projection light, resulting in ghosting in the projected image, the following combination is preferred: the transparent conductive film 113a is disposed on the second surface M2, the second light-shielding layer 1122 is disposed on the third surface M3, and the anti-reflection film 116 is disposed on the fourth surface M4. Because the second light-shielding layer 1122 is disposed on the third surface M3, projection light irradiating the first display area cannot pass through the second light-shielding layer 1122 and reach the transparent conductive film 113a. Consequently, ghosting due to reflection from the transparent conductive film 113a is avoided, thereby making the first main image clearer. In this case, the anti-reflection film 116 can increase the reflectivity of P-polarized light, so P-polarized light is preferably used as the projection light for the first display area.

[0085] In another embodiment, the heating element 113 is a transparent conductive film 113a, the transparent conductive film 113a is disposed on the second surface M2, the second light-shielding layer 1122 is disposed on the third surface M3 or the fourth surface M4, and the anti-reflection film 116 is not disposed on the fourth surface M4. In this case, S-polarized light can be used as the projection light of a display area.

[0086] Optionally, in the above embodiment, when the anti-reflection film 116 is provided, if the anti-reflection film 116 covers the second display area, the reflectivity of the second display area for P-polarized light is greater than or equal to 10%. Preferably, the reflectivity of the second display area for P-polarized light is greater than or equal to 15%. Further, the reflectivity of the second display area for P-polarized light is greater than or equal to 20%. Furthermore, the reflectivity of the second display area for P-polarized light is greater than or equal to 30%.

[0087] Optionally, in the above embodiment, when the anti-reflection film 116 is provided, if the anti-reflection film 116 covers the first display area, the reflectivity of the first display area for P-polarized light is greater than or equal to 10%. Preferably, the reflectivity of the first display area for P-polarized light is greater than or equal to 15%. Further, the reflectivity of the first display area for P-polarized light is greater than or equal to 20%. Furthermore, the reflectivity of the first display area for P-polarized light is greater than or equal to 30%.

[0088] Optionally, in the above embodiment, when the anti-reflection film 116 is provided, if the same anti-reflection film 116 is used to cover the first display area and the second display area at the same time, the reflectivity of the first display area and the second display area to P polarized light is consistent.

[0089] Several feasible implementations of the heating element 113 are described below with reference to the accompanying drawings.

[0090] Referring to FIG. 6 , in one embodiment, the heating element 113 is a transparent conductive film 113 a. The transparent conductive film 113 a includes a metal layer, which provides the transparent conductive film 113 a with both heat insulation and heating functions. The transparent conductive film can be directly deposited onto the second surface M2 or the third surface M3 by chemical vapor deposition (CVD) or physical vapor deposition (PVD), such as by magnetron sputtering. Furthermore, the transparent conductive film is preferably capable of withstanding high-temperature heat treatments, such as those associated with bending processes such as baking or tempering. The transparent conductive film 113 a includes at least one of a metal layer, a metal alloy layer, or a metal oxide layer. The metal layer includes at least one of gold (Au), silver (Ag), copper (Cu), aluminum (Al), or molybdenum (Mo). The metal alloy layer includes a metal alloy composed of silver and at least one of copper (Cu), gold (Au), palladium (Pd), tin (Sn), zinc (Zn), lead (Pb), or nickel (Ni). The metal oxide layer includes at least one of indium tin oxide, fluorine-doped tin dioxide, aluminum-doped tin dioxide, gallium-doped tin dioxide, boron-doped tin dioxide, tin zinc oxide, or antimony-doped tin oxide. For example, when the transparent conductive film includes a silver layer or a silver alloy layer, the silver layer or silver alloy layer is located between at least two dielectric layers, and the dielectric layer includes at least one of zinc oxide, tin oxide, indium oxide, titanium oxide, silicon oxide, aluminum oxide, silicon nitride, silicon carbide, aluminum nitride, or titanium metal layers.

[0091] Referring to Figures 7 and 8 , in another embodiment, the heating element 113 is an electric heating wire 113b, which can also be referred to as a conductive wire. The electric heating wire 113b is an enameled wire, wherein the inner layer of the enameled wire is a conductive material and the outer layer is an insulating material; or, the electric heating wire 113b is a tungsten wire, which is a thin wire made by forging and drawing a tungsten bar; or, the electric heating wire 113b is a copper wire.

[0092] In one embodiment, the electric heating wire 113b may be an enameled wire, the inner layer of which may be a conductive material such as copper wire, aluminum wire, or alloy wire, and the outer layer may be an insulating material such as polyurethane or polyimide. The wire diameter of the enameled wire may be 0.08 mm to 0.2 mm, for example, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, etc. The resistance of the enameled wire may be 0.5 Ω / m to 3.7 Ω / m, for example, 0.5 Ω / m, 1.0 Ω / m, 1.5 Ω / m, 1.8 Ω / m, 2.1 Ω / m, 2.6 Ω / m, 3.0 Ω / m, 3.5 Ω / m, 3.7 Ω / m, etc. The preferred wire diameter is 0.1mm to 0.15mm, and the resistance is 0.9Ω / m to 2.33Ω / m.

[0093] In another embodiment, the electric heating wire 113b can also be a tungsten wire. The tungsten wire is a thin wire made by forging and drawing a tungsten bar, with a wire diameter of 0.02 to 0.048 mm and a resistance of 33Ω / m to 194Ω / m. The preferred wire diameter is 0.048 mm and the resistance is 33Ω / m.

[0094] In another embodiment, the electric heating wire 113b may also be a metal copper wire with a wire diameter of 0.01 mm to 0.015 mm and a resistance of 0.017 Ω / m. The metal copper wire can increase the heating power density and shorten the heating time.

[0095] Referring to FIG8 , in another embodiment, the heating element 113 is composed of a transparent conductive film 113a having a conductive function and an electric heating wire 113b having a conductive function. In other words, the heating element 113 includes both the transparent conductive film 113a and the electric heating wire 113b. It should be noted that during the heating process of the heating element 113, the transparent conductive film 113a can be heated alone, the electric heating wire 113b can be heated alone, or the transparent conductive film 113a and the electric heating wire 113b can be heated simultaneously. For the description of the transparent conductive film 113a and the electric heating wire 113b, please refer to the description in the previous embodiment.

[0096] 8 , optionally, the transparent conductive film 113a is at least partially disposed in the light-transmitting area A1, and the electric heating wire 113b is disposed in the light-impermeable area A2. This allows the electric heating wire 113b to be hidden in the light-impermeable area A2, preventing the electric heating wire 113b from affecting the aesthetics of the laminated glass 110.

[0097] Referring further to Figure 8 , the non-light-transmitting area A2 optionally includes a first segment A21 and a second segment A22 spaced apart from each other. The first segment A21 is located at the bottom end of the laminated glass 110, where the bottom end refers to the end of the laminated glass 110 adjacent to the chassis of the vehicle 1 (or the end adjacent to the ground). The second segment A22 is located at the top end of the laminated glass 110, where the top end refers to the end of the laminated glass 110 away from the chassis of the vehicle 1 (or the end away from the ground). The transparent conductive film 113a is at least partially disposed in the light-transmitting area A1, and the electric heating wire 113b is disposed in the first segment A21 of the non-light-transmitting area A2. When the projection assembly 120 projects light onto the first display area, the first main image viewed by the driver is located in the first segment A21. If the first segment A21 becomes foggy or covered with frost or snow, heating by the electric heating wire 113b can quickly and effectively remove the fog and frost.

[0098] 4 , 7 , and 8 , the laminated glass 110 further comprises a first busbar 117 and a second busbar 118 disposed between the outer glass 111 and the inner glass 115 . The first busbar 117 and the second busbar 118 are disposed in the non-light-transmitting area A2 . The first busbar 117 and the second busbar 118 are spaced apart and electrically connected to the heating element 113 . When the first busbar 117 and the second busbar 118 are energized, the heating element 113 can generate heat.

[0099] Specifically, the power supply can cause a heating current to flow through the heating element 113 via the first busbar 117 and the second busbar 118. Under the action of the heating current, the heating element 113 generates heat, thereby enabling the laminated glass 110 to have defrosting, defogging, and deicing functions. The minimum distance between the first busbar 117 and the second busbar 118 and the edge of the light-transmitting layer 100 can be 6 mm to 30 mm, for example, 6 mm, 10 mm, 13 mm, 15 mm, 18 mm, 20 mm, 25 mm, 26 mm, 29 mm, 30 mm, etc. The first busbar 117 and the second busbar 118 can be made of metal foil, conductive silver paste, etc.

[0100] 4 and 7 , the first busbar 117 and the second busbar 118 are disposed in the non-light-transmitting area A2. Since the non-light-transmitting area A2 is opaque, disposing the first busbar 117 and the second busbar 118 in the non-light-transmitting area A2 can conceal them, thereby enhancing the aesthetics of the laminated glass 110 and preventing the first busbar 117 and the second busbar 118 from interfering with the driver's viewing of the projected image.

[0101] 5 , the adhesive layer 114 is a thermoplastic polymer film having a wedge angle in the range of 0.1 mrad to 1.0 mrad, wherein the wedge angle may be, but is not limited to, 0.1 mrad, 0.2 mrad, 0.3 mrad, 0.4 mrad, 0.5 mrad, 0.6 mrad, 0.7 mrad, 0.8 mrad, 0.9 mrad, 1.0 mrad, etc.

[0102] Specifically, when projection light illuminates the second display area, firstly, due to the presence of a heating element 113 between the outer glass 111 and the inner glass 115, a small portion of the projection light will enter the laminated glass 110 and reach the heating element 113. If the heating element 113 is a transparent conductive film 113a, the transparent conductive film 113a will reflect this portion of the projection light, forming a first secondary image. The first secondary image does not overlap, or at least partially overlaps, the second primary image, resulting in a ghost image. Secondly, due to the angular deviation of the light emitted by the projection assembly 120, a very small portion of the light will reach the first surface M1 and be reflected back to the eye area EB, producing a second secondary image. The second secondary image does not overlap, or at least partially overlaps, the second primary image, resulting in a ghost image. Both the first and second secondary images will affect the driver's ability to view the second primary image, resulting in a blurred projection image.

[0103] In this embodiment, the heating element 113 is disposed between the outer glass 111 and the adhesive layer 114 . Therefore, the first and second secondary images can be corrected by the wedge-shaped adhesive layer 114 , thereby making the first and second secondary images closer to the second primary image. The closer the first and second secondary images are to the second primary image, the clearer the second primary image can be seen by the driver.

[0104] Specifically, after projecting light, projection assembly 120 generates three virtual images visible to human eye area EB: a second primary image, a first secondary image, and a second secondary image. The second primary image, the first secondary image, and the second secondary image are formed, respectively, by the first, second, and third light rays in the projection light. The first secondary image can also be referred to as a first ghost image, and the second secondary image can also be referred to as a second ghost image.

[0105] Regarding the second main image: after the first light reaches the anti-reflection film 116, it is reflected by the surface of the anti-reflection film 116 facing away from the inner glass 115 (hereinafter referred to as the exposed surface of the anti-reflection film 116), changing its propagation direction and propagating toward the human eye area EB. The first light after being reflected by the anti-reflection film 116 is further defined as the first eye-entering light. The first eye-entering light finally enters the human eye area EB, and the second main image is located on the reverse extension line of the propagation direction of the first eye-entering light.

[0106] For the first secondary image, the second light ray enters the laminated glass 110 and sequentially passes through the anti-reflection film 116, the inner glass 115, and the adhesive layer 114 before reaching the heating element 113. Because the heating element 113 includes a metal layer that reflects visible light, it reflects the light. The second light ray is reflected by the heating element 113, changing its direction of propagation and then propagating toward the location of the anti-reflection film 116. It eventually passes through the exposed surface of the anti-reflection film 116. This second light ray is further defined as the second incident light ray. The second incident light ray ultimately enters the human eye region EB, and the first secondary image is located on the line extending in the opposite direction of the propagation direction of the second incident light ray.

[0107] Regarding the second secondary image, the third light enters the laminated glass 110 and sequentially passes through the anti-reflection film 116, the inner glass 115, the adhesive layer 114, and the heating element 113 before reaching the inner portion of the outer glass 111. The third light is then reflected by the first surface M1, changing its propagation direction and propagating toward the location of the anti-reflection film 116. The third light that passes through the exposed surface is further defined as the third incident light. The third incident light finally enters the human eye region EB, and the second secondary image is located on the line extending in the opposite direction of the propagation direction of the third incident light.

[0108] Furthermore, the adhesive layer 114 includes a fifth surface M5 and a sixth surface M6 disposed opposite to each other. The fifth surface M5 is disposed opposite to the second surface M2, and the sixth surface M6 is disposed opposite to the third surface M3. The fifth surface M5 and the sixth surface M6 are relatively inclined so that the adhesive layer 114 is wedge-shaped. The so-called relative inclination means that the fifth surface M5 and the sixth surface M6 are not parallel to each other, so that the adhesive layer 114 is wedge-shaped. Optionally, the wedge angle α (see FIG. 5 ) formed by the fifth surface M5 and the sixth surface M6 can be 0.1 mrad to 1.0 mrad, preferably 0.2 mrad to 0.7 mrad, and more preferably 0.25 mrad to 0.55 mrad.

[0109] It is understood that changing the relative inclination angle between the fifth surface M5 and the sixth surface M6 will change the propagation path of the light passing through the adhesive layer 114. The second primary image is produced by the first light directly reflecting off the exposed surface of the anti-reflection film 116. Therefore, the position of the second primary image is not affected by the wedge structure. The first secondary image is produced by the second light reflecting off the functional film layer, which is disposed between the outer glass 111 and the adhesive layer 114. Therefore, the second light will pass through the adhesive layer 114 as it enters and exits the exposed surface of the anti-reflection film 116, affecting the propagation path of the second light. The second secondary image is produced by the third light reflecting off the first surface M1. The third light will pass through the adhesive layer 114 as it enters and exits the exposed surface of the anti-reflection film 116, affecting the propagation path of the third light. In summary, if the relative inclination angle between the fifth surface M5 and the sixth surface M6 is changed, the propagation paths of the second light and the third light will change accordingly, thereby changing the positions of the first secondary image and the second secondary image. Therefore, during the design phase, the relative inclination angle between the fifth surface M5 and the sixth surface M6 can be set according to the position of the second primary image, so that the first secondary image and the second secondary image are as close to the second primary image as possible. Therefore, compared with the related art in which the adhesive layer 114 is set to a uniform thickness everywhere, the present embodiment sets the adhesive layer 114 in a wedge-shaped structure, which can deflect the second light and the third light, thereby bringing the first secondary image and the second secondary image closer to the second primary image. It can be understood that the closer the first secondary image and the second secondary image are to the second primary image, the higher the degree of overlap between the first secondary image and the second secondary image, respectively, thereby reducing the impact of the first secondary image and the second secondary image on the driver's field of view and improving the driving experience.

[0110] The following details the materials, processes, dimensions, and other information of each component of the laminated glass 110 .

[0111] Outer glass 111: The outer glass 111 has a first surface M1 facing the outside of the vehicle 1 and a second surface M2 facing the inside of the vehicle 1, and has undergone a high-temperature bending and forming process at a temperature of at least 500°C; the thickness of the outer glass 111 can be 1.6mm to 5.0mm, for example, 1.6mm, 1.8mm, 2.1mm, 2.6mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc., with 1.8mm and 2.1mm being preferred; the outer glass 111 can be transparent glass, ordinary green glass, or solar green glass, with solar green glass with light-absorbing function being preferred.

[0112] Adhesive layer 114: Adhesive layer 114, also known as a thermoplastic interlayer, is sandwiched between outer glass 111 and inner glass 115 and is used to bond the second surface M2 to the third surface M3. The thermoplastic interlayer is used to bond and secure the outer glass 111 and inner glass 115 together. For example, polycarbonate (PC), polyvinyl chloride (PVC), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR), or ionomeric polymer film (SGP) can be used. Of course, the thermoplastic interlayer can also be provided with a localized tinting function. For example, at least one tinted area can be provided at the top of the laminated glass 110 to serve as a shade band to reduce sunlight interference to the human eye, or a tinted area can be provided at the bottom of the laminated glass 110 to provide a shielding effect. Alternatively, the thermoplastic interlayer can be formed by splicing two or three layers of thermoplastic polymer film, each with a tinted bottom or top portion of the laminated glass 110 and a transparent intermediate visible area. The thermoplastic interlayer can also contain an infrared absorber to provide heat and light absorption. The thermoplastic interlayer can also comprise at least two layers, one of which has a higher plasticizer content to provide sound insulation. A thermoplastic polymer film with a wedge-shaped corner that exhibits infrared absorption is preferred.

[0113] Inner glass 115: The inner glass 115 has a third surface M3 facing the outside of the vehicle 1 and a fourth surface M4 facing the inside of the vehicle 1, and has undergone a high-temperature bending and forming process of at least 500°C; the thickness of the inner glass 115 is generally 0.7mm to 5.0mm, for example, 0.7mm, 1.1mm, 1.6mm, 1.8mm, 2.1mm, 2.6mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc., with 1.8mm and 2.1mm being preferred. The inner plate glass 1 can be transparent glass, ordinary green glass, or solar green glass, with transparent glass being preferred.

[0114] Light-shielding layer 112: This light-shielding layer 112, also known as a shielding layer, can be formed on the second surface M2 and / or the fourth surface M4 using ceramic ink or UV ink to enhance the appearance, shield components within the vehicle, and improve local adhesion. Alternatively, a thermoplastic interlayer with a coloring function can be used as the light-shielding layer 112. The visible light transmittance of the light-shielding layer 112 is less than or equal to 5.0%, preferably less than or equal to 1.5%.

[0115] Anti-reflection film 116: The anti-reflection film 116 can also be called a dielectric film. The anti-reflection film 116 can be directly deposited onto the fourth surface M4 by chemical vapor deposition (CVD) or physical vapor deposition (PVD), for example, by magnetron sputtering deposition; and preferably, the anti-reflection film 116 can withstand high-temperature heat treatment, such as heat treatment processes of bending processes such as bending or tempering. Specifically, the anti-reflection film 116 can include highly reflective non-metallic materials such as silicon oxide and nitrogen oxide. This anti-reflection film 116 has a high reflective effect on P-polarized light. This anti-reflection film 116 does not contain soft metals such as silver that are easily chemically reactive, so it has good wear resistance and corrosion resistance. It can be exposed to the air and serve as the inner surface of the laminated glass 110 to directly receive the projection light and achieve a good reflection effect.

[0116] First busbar 117 and second busbar 118: The first busbar 117 and second busbar 118 are located between the outer glass 111 and the inner glass 115. The first busbar 117 and second busbar 118 are respectively connected to the heating element 113. The power supply can pass the heating current through the heating element 113 through the first busbar 117 and second busbar 118. The heating element 113 generates heat under the action of the heating current, thereby enabling the window glass to have defrosting, defogging, and deicing functions. The distance between the first busbar 117 and second busbar 118 and the edge of the light-transmitting layer 100 can be 6 mm to 30 mm. The material of the first busbar 117 and second busbar 118 can be metal foil, conductive silver paste, etc.

[0117] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A laminated glass, characterized in that: The laminated glass comprises: An outer glass and an inner glass are stacked, wherein the outer glass comprises a first surface away from the inner glass and a second surface close to the inner glass, and the inner glass comprises a third surface close to the outer glass and a fourth surface away from the outer glass; an adhesive layer, the adhesive layer being disposed between the outer glass and the inner glass to bond the outer glass and the inner glass together; a light shielding layer, wherein the light shielding layer is arranged along the edge of the laminated glass so that the laminated glass forms a light-transmitting area and a non-light-transmitting area, wherein the non-light-transmitting area has at least one first display area, and the first display area can reflect the projection light emitted by the projection assembly and form a first main image; and A heating element is disposed between the outer glass and the inner glass, and can generate heat when powered on.

2. The laminated glass according to claim 1, characterized in that: The shading layer includes a first shading layer, the first shading layer is arranged on the second surface, the heating element is arranged between the adhesive layer and the second surface, or the heating element is arranged between the adhesive layer and the third surface.

3. The laminated glass according to claim 2, characterized in that: The laminated glass further includes an anti-reflection film, which is disposed on the fourth surface and at least partially covers the first display area. The anti-reflection film is used to increase the reflectivity of the first display area to P-polarized light.

4. The laminated glass according to any one of claims 1 to 3, characterized in that: There is at least one second display area in the light-transmitting area, and the second display area can reflect the projection light emitted by the projection component and form a second main image.

5. The laminated glass according to claim 4, characterized in that: The laminated glass further comprises an anti-reflection film, wherein the anti-reflection film at least partially covers the second display area, and the anti-reflection film is used to increase the reflectivity of the second display area to P-polarized light.

6. The laminated glass according to any one of claims 1 to 3, characterized in that: The shading layer includes a second shading layer, the second shading layer is disposed on the third surface or the fourth surface, the second shading layer at least covers the first display area, and the heating element is disposed between the second shading layer and the second surface.

7. The laminated glass according to claim 6, characterized in that: There is at least one second display area in the light-transmitting area, and the second display area can reflect the projection light emitted by the projection component and form a second main image. The laminated glass also includes an anti-reflection film, which is arranged on the fourth surface and at least partially covers the second display area. The anti-reflection film is used to increase the reflectivity of the second display area to P-polarized light.

8. The laminated glass according to claim 3, 5 or 7, characterized in that: The reflectivity of the first display area to P polarized light is greater than or equal to 10%, and / or, there is at least one second display area in the light-transmitting area, and the reflectivity of the second display area to P polarized light is greater than or equal to 10%.

9. The laminated glass according to claim 1, characterized in that: The heating element is a transparent conductive film, which includes at least one of a metal layer, a metal alloy layer or a metal oxide layer. The metal layer includes at least one of gold (Au), silver (Ag), copper (Cu), aluminum (Al) or molybdenum (Mo). The metal alloy layer includes a metal alloy composed of silver and at least one of copper (Cu), gold (Au), palladium (Pd), tin (Sn), zinc (Zn), lead (Pb) and nickel (Ni). The metal oxide layer includes at least one of indium tin oxide, fluorine-doped tin dioxide, aluminum-doped tin dioxide, gallium-doped tin dioxide, boron-doped tin dioxide, tin-zinc oxide or antimony-doped tin oxide.

10. The laminated glass according to claim 1, wherein: The heating element is an electric heating wire; The electric heating wire is an enameled wire, the inner layer of the enameled wire is a conductor material, and the outer layer is an insulating material; Or, the electric heating wire is a tungsten wire; Alternatively, the electric heating wire is a metal copper wire.

11. The laminated glass according to claim 1, characterized in that: The laminated glass further includes a first bus bar and a second bus bar arranged between the outer glass and the inner glass, the first bus bar and the second bus bar are arranged in the non-light-transmitting area, the first bus bar and the second bus bar are arranged at intervals and are both electrically connected to the heating element, and the heating element can generate heat when the first bus bar and the second bus bar are energized.

12. The laminated glass according to claim 11, characterized in that: The minimum distance between the first bus bar or the second bus bar and the edge of the light-transmitting layer may be 6 mm to 30 mm.

13. The laminated glass according to claim 1, characterized in that: The adhesive layer is a thermoplastic polymer film with a wedge angle in the range of 0.1 mrad to 1.0 mrad.

14. A head-up display system, characterized in that: The head-up display system comprises a projection component and the laminated glass according to any one of claims 1 to 13, wherein the projection component is used to emit projection light to the laminated glass.

15. The head-up display system according to claim 14, characterized in that: The projection light includes P-polarized light and / or S-polarized light.

16. The head-up display system according to claim 14, characterized in that: The projection assembly includes a first projection assembly and a second projection assembly. There is at least one first display area in the non-light-transmitting area of ​​the laminated glass, and there is at least one second display area in the light-transmitting area of ​​the laminated glass. The first projection assembly is used to project light to the first display area and form a first main image, and the second projection assembly is used to project light to the second display area and form a second main image.

17. The head-up display system according to claim 14, characterized in that: The incident angle of the projection light emitted by the projection assembly to the laminated glass on the laminated glass is 40° to 80°.

18. The head-up display system according to claim 17, characterized in that: The horizontal viewing angle HFOV of the projection light emitted by the projection assembly to the laminated glass is 0° to 50° in the horizontal direction.

19. The head-up display system according to claim 14, wherein: The color difference between the image formed on the laminated glass by the projection light emitted by the projection assembly and the laminated glass Said in, is the brightness difference between the color of the image formed by the projection light on the laminated glass and the color of the laminated glass, is the green-red chromaticity difference between the color of the image formed by the projection light on the laminated glass and the color of the laminated glass, It is the blue-yellow chroma difference between the color of the image formed by the projection light on the laminated glass and the color of the laminated glass.

20. A vehicle, characterized in that: The vehicle comprises a vehicle frame and a head-up display system as claimed in any one of claims 14 to 19, wherein the head-up display system is carried by the vehicle frame.

Images