Rear window assembly, vehicle

Abstract

The application provides a back windshield assembly and a vehicle. The back windshield assembly comprises a laminated glass and a display pattern layer. The laminated glass comprises a first glass plate, a first bonding layer, a light waveguide layer, a second bonding layer and a second glass plate which are sequentially stacked. The display pattern layer is arranged between the first bonding layer and the light waveguide layer and / or between the second bonding layer and the light waveguide layer. The light waveguide layer is used for propagating light. The light forms total reflection in the light waveguide layer. The display pattern layer is used for reflecting the light to the outside of the laminated glass and forming a first light-emitting pattern. The first light-emitting pattern is used for observation outside the vehicle. The back windshield assembly provided by the application realizes light emission of a complex pattern on the glass, omits the complex wiring in the related art, reduces the maintenance cost, improves the display effect of the back windshield assembly, improves the appearance performance of the vehicle, can be used as a backup for a brake light, and widens the use scene of display.

Description

Technical Field

[0001] This application belongs to the field of glass technology, specifically relating to rear window assemblies and vehicles. Background Technology

[0002] Lighting is an indispensable part of a vehicle, providing illumination and signaling to other road users through various lights. Currently, LED chips or PVB reflective ink with peripheral glass light-emitting units are used to achieve pattern illumination. However, LED chips require proper internal wiring for conductivity to light up, which poses a challenge for complex patterns. Complex patterns are easily affected by internal wiring, making it difficult to make multiple patterns independent, thus reducing the display effect of the rear windshield assembly and limiting the application scenarios of the display. Summary of the Invention

[0003] In view of this, the first aspect of this application provides a rear windshield assembly, the rear windshield assembly including laminated glass and a display pattern layer, the laminated glass including a first glass plate, a first adhesive layer, an optical waveguide layer, a second adhesive layer and a second glass plate stacked sequentially, the display pattern layer being disposed between the first adhesive layer and the optical waveguide layer, and / or, disposed between the second adhesive layer and the optical waveguide layer;

[0004] The optical waveguide layer is used to propagate light, and the light undergoes total internal reflection in the optical waveguide layer. The display pattern layer is used to reflect the light to the outside of the laminated glass and form a first luminescent pattern, which is used for external observation of the vehicle.

[0005] The rear window assembly further includes a blocking layer, which is disposed between the first adhesive layer and the second adhesive layer. The blocking layer and the optical waveguide layer are disposed in the same layer along the stacking direction perpendicular to the laminated glass. The blocking layer and the display pattern layer are staggered. The blocking layer is used to block light from the optical waveguide layer.

[0006] The laminated glass includes a first region and a second region. The barrier layer is disposed corresponding to the gap between the first region and the second region. The display pattern layer is disposed in the first region and the second region respectively. The display pattern layer is used to form a first luminescent pattern in the first region and another first luminescent pattern in the second region.

[0007] The first region is located in the middle region of the laminated glass, and the second region is located in the side region of the laminated glass.

[0008] There are two second zones, and the first zone is located between the two second zones along the horizontal direction of the laminated glass.

[0009] The display pattern layers located in the two second zones are symmetrically arranged along the central axis of the laminated glass.

[0010] The refractive index of the optical waveguide layer is greater than that of the blocking layer, and the light rays undergo total internal reflection at the interface between the blocking layer and the optical waveguide layer.

[0011] Wherein, the refractive index of the barrier layer is equal to the refractive index of the first adhesive layer, and the refractive index of the barrier layer is equal to the refractive index of the second adhesive layer.

[0012] The rear windshield assembly also includes a light-emitting element disposed on the periphery of the laminated glass, the light-emitting element being used to emit the light.

[0013] The light-emitting element includes multiple light-emitting sub-elements, which are respectively disposed in the first area and the second area.

[0014] The laminated glass includes a top end and a bottom end that are arranged opposite to each other. Some of the light-emitting elements are located at the top end and / or the bottom end of the first region, and the other part of the light-emitting elements are located at the top end and / or the bottom end of the second region.

[0015] The light emitted from the light-emitting element has a divergence angle θ1, wherein the divergence angle θ1 ≤ 12°, or ≤ 10°, or ≤ 8°.

[0016] The light intensity is ≥25cd, ≥30cd, or ≥35cd.

[0017] The light-emitting element includes a light-emitting part and a collimating part. The collimating part is disposed between the light-emitting part and the laminated glass. The light-emitting part is used to emit light, and the collimating part is used to receive the light and make the light parallel to the glass.

[0018] Wherein, the light incident on the display pattern layer undergoes diffuse reflection, and the display pattern layer satisfies at least one of the following conditions:

[0019] The roughness of the display pattern layer is Ra, which is 100 nm to 800 nm.

[0020] The visible light transmittance of the display pattern layer is ≥90%.

[0021] The refractive index of the optical waveguide layer is greater than that of the first adhesive layer, and the refractive index of the optical waveguide layer is greater than that of the second adhesive layer.

[0022] The refractive index of the optical waveguide layer is >1.49, or ≥1.52, or ≥1.55.

[0023] The light ray has an incident angle θ2, which is the angle between the light ray entering the optical waveguide layer and the normal direction of the laminated glass, and the incident angle θ2 ≥ 73°.

[0024] The material of the optical waveguide layer is a polymer layer;

[0025] And / or, the physical thickness of the optical waveguide layer is ≤0.76mm, or ≤0.57mm, or ≤0.38mm.

[0026] A second aspect of this application provides a vehicle comprising a body and a rear window assembly as described above, the laminated glass being mounted at an opening in the body.

[0027] The rear windshield assembly and vehicle provided in this application achieve total internal reflection of light within the optical waveguide layer, confining its propagation within the waveguide layer. During this process, the light cannot be observed from either the inside or outside of the laminated glass. When light strikes the display pattern layer, the display pattern layer reflects the light out of the laminated glass, causing the pattern to emit light and forming a first luminous pattern. The user can observe this first luminous pattern from outside the vehicle to obtain display information. Furthermore, the remaining light continues to propagate within the optical waveguide layer. Therefore, the rear windshield assembly provided in this application achieves the illumination of complex patterns on the glass, eliminating the complex wiring of related technologies, reducing maintenance costs, improving the display effect of the rear windshield assembly, enhancing the vehicle's appearance, and serving as a backup for brake lights, thus broadening the application scenarios of the display. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0029] Figure 1 This is a cross-sectional schematic diagram of a rear windshield assembly provided in one embodiment of this application.

[0030] Figure 2 This is a cross-sectional view of the rear windshield assembly provided in one embodiment of this application from another perspective.

[0031] Figure 3 This is a cross-sectional schematic diagram of a rear windshield assembly provided for another embodiment of this application.

[0032] Figure 4 This is a schematic diagram of the structure of a rear windshield assembly provided in one embodiment of this application.

[0033] Labeling explanation: Rear windshield assembly 1, laminated glass 10, first glass plate 111, first adhesive layer 112, optical waveguide layer 113, second adhesive layer 114, second glass plate 115, first zone 116, second zone 117, display pattern layer 20, light-emitting element 30, blocking layer 40. Detailed Implementation

[0034] The following are preferred embodiments of this application. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

[0035] Please refer to this as well. Figures 1-4 This embodiment provides a rear window assembly 1, which includes a laminated glass 10 and a display pattern layer 20. The laminated glass 10 includes a first glass plate 111, a first adhesive layer 112, an optical waveguide layer 113, a second adhesive layer 114, and a second glass plate 115 stacked sequentially. The display pattern layer 20 is disposed between the first adhesive layer 112 and the optical waveguide layer 113, and / or between the second adhesive layer 114 and the optical waveguide layer 113.

[0036] The optical waveguide layer 113 is used to propagate light, and the light undergoes total internal reflection in the optical waveguide layer 113. The display pattern layer 20 is used to reflect the light to the outside of the laminated glass 10 and form a first luminous pattern, which is used for external observation of the vehicle.

[0037] Specifically, the first glass panel 111 has a first surface and a second surface. The first surface is away from the first adhesive layer 112 and in contact with the external environment of the vehicle, while the second surface is close to the first adhesive layer 112. The second glass panel 115 has a third surface and a fourth surface. The third surface is close to the second adhesive layer 114, while the fourth surface is away from the second adhesive layer 114 and close to the internal environment of the vehicle. The first adhesive layer 112 connects the second surface and the optical waveguide layer 113, and the second adhesive layer 114 connects the third surface and the optical waveguide layer 113.

[0038] The thickness of the first glass plate 111 is 1.4 mm to 2.1 mm, and the visible light transmittance of the first glass plate 111 is ≥70%, ≥80%, or ≥90%. The first glass plate 111 is transparent glass or ultra-transparent glass (ultra-white glass). The total iron content (calculated as Fe2O3) of the transparent glass (standard white glass) is less than or equal to 0.1%, or even less than or equal to 0.05%, and the visible light transmittance of the transparent glass is 80% to 95%. The total iron content (calculated as Fe2O3) of the ultra-transparent glass (ultra-white glass) is less than or equal to 0.015%, or even less than or equal to 0.01%, or even less than or equal to 50 PPM, and the visible light transmittance of the ultra-transparent glass is 90% to 95%. For example, the first glass plate 111 can be 2.1 mm thick transparent glass with a visible light transmittance of 89%, or 1.6 mm thick green glass with a visible light transmittance of 83%, or 2.1 mm thick green glass with a visible light transmittance of 80%.

[0039] The first adhesive layer 112 and the second adhesive layer 114 can be a transparent thermoplastic polymer film or a light-colored thermoplastic polymer film, and the physical thickness of both the first adhesive layer 112 and the second adhesive layer 114 is ≤0.76mm, ≤0.57mm, or ≤0.38mm. For example, the physical thickness of the first adhesive layer 112 and the second adhesive layer 114 can be, but is not limited to, 0.2mm, 0.38mm, 0.57mm, or 0.76mm. 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), TPU (thermoplastic polyurethane), and ionomer polymer (SGP).

[0040] Optionally, the visible light transmittance of the first adhesive layer 112 and the second adhesive layer 114 is ≥70%, ≥80%, or ≥85%. When the first adhesive layer 112 and the second adhesive layer 114 are transparent thermoplastic polymers, the visible light transmittance of the transparent thermoplastic polymer is greater than or equal to 85%. For example, the visible light transmittance of the first adhesive layer 112 and the second adhesive layer 114 can be, but is not limited to, 85%, 90%, or 95%.

[0041] Optionally, the first adhesive layer 112 and the second adhesive layer 114 can be a single-layer structure or a multi-layer structure. Examples of multi-layer structures include double-layer, triple-layer, quadruple-layer, and five-layer structures. The first adhesive layer 112 and the second adhesive layer 114 can also have other functions, such as adding infrared absorbers to provide sun protection or heat insulation, adding ultraviolet absorbers to provide ultraviolet protection, or having at least one layer of the multi-layer structure with a higher plasticizer content to provide sound insulation.

[0042] The second glass plate 115 has a thickness of 1.4 mm to 2.1 mm and a visible light transmittance of ≥70%, ≥80%, or ≥90%. The second glass plate 115 is transparent glass or ultra-transparent glass (ultra-white glass). The total iron content (calculated as Fe2O3) of the transparent glass (standard white glass) is less than or equal to 0.1%, even less than or equal to 0.05%, and the visible light transmittance of the transparent glass is 80% to 95%. The total iron content (calculated as Fe2O3) of the ultra-transparent glass (ultra-white glass) is less than or equal to 0.015%, even less than or equal to 0.01%, and even less than or equal to 50 PPM, and the visible light transmittance of the ultra-transparent glass is 90% to 95%. For example, the second glass plate 115 can be 2.1 mm thick transparent glass with a visible light transmittance of 89%, or 1.6 mm thick green glass with a visible light transmittance of 83%, or 2.1 mm thick green glass with a visible light transmittance of 80%.

[0043] The number of display pattern layers 20 can be one or more. Optionally, one display pattern layer 20 is disposed at the center of the laminated glass 10. Optionally, multiple display pattern layers 20 are spaced apart. Optionally, multiple display pattern layers 20 are spaced apart along the horizontal direction of the laminated glass 10. Optionally, multiple display pattern layers 20 are spaced apart along the vertical direction of the laminated glass 10.

[0044] Wherein, the light incident on the display pattern layer 20 forms diffuse reflection, and the display pattern layer 20 satisfies at least one of the following conditions: the roughness Ra of the display pattern layer 20 is 100nm to 800nm, specifically for example, 100nm, or 150nm, or 200nm, or 250nm, or 300nm, or 350nm, or 400nm, or 450nm, or 500nm, or 550nm, or 600nm, or 650nm, or 700nm, or 750nm, or 800nm, etc. Preferably, the roughness Ra of the display pattern layer 20 is 100nm to 400nm. This embodiment limits the roughness of the display pattern layer 20 to 100nm to 800nm, so that when light hits the display pattern layer 20, a diffuse reflection effect is generated. The display pattern layer 20 can reflect light out of the laminated glass 10 and make the pattern emit light to form a first luminous pattern. Other light that meets the total reflection condition will continue to propagate in the laminated glass 10.

[0045] And / or, the visible light transmittance of the display pattern layer 20 is ≥90%, specifically, for example, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99%, etc., preferably, the visible light transmittance of the display pattern layer 20 is ≥95%. This embodiment improves the aesthetic effect of the laminated glass 10 by limiting the visible light transmittance of the display pattern layer 20 to ≥90%, without affecting the use of the laminated glass 10 during the day, thus broadening the applicability of the display glass assembly.

[0046] Optionally, the material of the display pattern layer 20 includes ink, for example, the material of the display pattern layer 20 includes invisible ink with reflective and morphologically transparent properties.

[0047] The refractive index of the optical waveguide layer 113 is greater than that of the first adhesive layer 112, and the refractive index of the optical waveguide layer 113 is greater than that of the second adhesive layer 114.

[0048] The refractive index of the first adhesive layer 112 and the second adhesive layer 114 is ≤1.49. The refractive index of the optical waveguide layer 113 is >1.49, specifically, it can be 1.5, 1.51, 1.52, 1.53, 1.54, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.9, or 2, etc. Preferably, the refractive index of the optical waveguide layer 113 is ≥1.52, and more preferably, the refractive index of the optical waveguide layer 113 is ≥1.55.

[0049] The light ray has an incident angle θ2, which is the angle between the light ray entering the optical waveguide layer 113 and the normal direction of the optical waveguide layer 113. The incident angle θ2 ≥ 73°, and can be exemplified by 73°, 73.5°, 74°, 74.5°, 75°, 75.5°, 76°, 76.5°, 77°, 77.5°, 78°, 78.5°, 79°, 80°, 82°, or 84°, etc. Preferably, the incident angle θ2 ≥ 76°. More preferably, the incident angle θ2 ≥ 80°.

[0050] For example, when the refractive index of the optical waveguide layer 113 is ≤1.52, the incident angle θ2 is ≥78.52°.

[0051] For example, when the refractive index of the optical waveguide layer 113 is ≤1.55, the incident angle θ2 is ≥73.74°.

[0052] This embodiment limits the refractive index and incident angle θ2 of the optical waveguide layer 113 to ensure that the light undergoes total internal reflection in the optical waveguide layer 113, making the light invisible from both the inside and outside of the laminated glass 10. When the light shines on the display pattern layer 20, the display pattern layer 20 can reflect the light out of the laminated glass 10, thereby causing the pattern to emit light and forming a first luminous pattern. The user can observe the first luminous pattern from outside the vehicle to obtain display information.

[0053] The optical waveguide layer 113 is made of a polymer layer. For example, EVA material can be used as the material of the optical waveguide layer 113. EVA material can be made into a thin film with a refractive index of 1.52.

[0054] The physical thickness of the optical waveguide layer 113 is ≤0.76mm, specifically for example, 0.76mm, 0.73mm, 0.7mm, 0.67mm, 0.65mm, 0.6mm, 0.57mm, 0.55mm, 0.5mm, 0.45mm, 0.4mm, 0.38mm, 0.35mm, or 0.3mm, etc. Preferably, the physical thickness of the optical waveguide layer 113 is ≤0.57mm, and more preferably, the physical thickness of the optical waveguide layer 113 is ≤0.38mm.

[0055] Optionally, the physical thickness of the optical waveguide layer 113 is equal to the physical thickness of the first adhesive layer 112, and the physical thickness of the optical waveguide layer 113 is equal to the physical thickness of the second adhesive layer 114.

[0056] Optionally, the display pattern layer 20 has a reflective surface that receives the light. When the reflective surface faces the outside of the vehicle, the display pattern layer 20 is used to form the first luminous pattern. When the reflective surface faces the inside of the vehicle, the display pattern layer 20 is also used to form a second luminous pattern, which is used for observation inside the vehicle.

[0057] For example, the first glass plate 111 is the outer glass plate, the second glass plate 115 is the inner glass plate, and the display pattern layer 20 is disposed between the second adhesive layer 114 and the optical waveguide layer 113. The reflective surface of the display pattern layer 20 is disposed facing the first glass plate 111. At this time, the display pattern layer 20 forms a first luminous pattern, and the first luminous pattern can be observed outside the vehicle.

[0058] For example, the first glass plate 111 serves as the outer glass plate, the second glass plate 115 serves as the inner glass plate, and the display pattern layer 20 is disposed between the first adhesive layer 112 and the optical waveguide layer 113. The reflective surface of the display pattern layer 20 is disposed facing the second glass plate 115. At this time, the display pattern layer 20 forms a second luminous pattern, which can be observed inside the vehicle.

[0059] In another embodiment, the rear window assembly 1 further includes a blocking layer 40, which is disposed between the first adhesive layer 112 and the second adhesive layer 114. The blocking layer 40 and the optical waveguide layer 113 are disposed in the same layer along the stacking direction perpendicular to the laminated glass 10. The blocking layer 40 and the display pattern layer 20 are staggered. The blocking layer 40 is used to block light from the optical waveguide layer 113.

[0060] The blocking layer 40 connects the first adhesive layer 112 and the second adhesive layer 114, and also connects to the optical waveguide layer 113. There is a gap between the orthographic projection of the blocking layer 40 onto the optical waveguide layer 113 and the orthographic projection of the display pattern layer 20 onto the optical waveguide layer 113; in other words, the orthographic projections of the blocking layer 40 and the display pattern layer 20 onto the optical waveguide layer 113 do not coincide. Optionally, there may be one or more blocking layers 40. Optionally, the blocking layer 40 may be a blocking strip, arranged around the perimeter. Optionally, the blocking layer 40 may include multiple blocking portions, spaced apart. Optionally, the blocking layer 40 may extend vertically along the laminated glass 10. Optionally, the blocking layer 40 may extend horizontally along the laminated glass 10. Optionally, the physical thickness of the blocking layer 40 may be equal to the physical thickness of the optical waveguide layer 113. Optionally, the blocking layer 40 may reflect light and / or absorb light. Preferably, the blocking layer 40 is capable of reflecting light.

[0061] The laminated glass 10 includes a first region 116 and a second region 117. The barrier layer 40 is disposed corresponding to the gap between the first region 116 and the second region 117. The display pattern layer 20 is disposed in the first region 116 and the second region 117 respectively. The display pattern layer 20 is used to form a first luminescent pattern in the first region 116 and another first luminescent pattern in the second region 117.

[0062] The blocking layer 40 can confine light within a zone, making multiple patterns within the zone independent of each other, thus improving the display effect of the rear window assembly 1. For example, for the rear window assembly 1 of a vehicle, not only can the brake lights be integrated into the laminated glass 10, but turn signals and various signal signs to remind following vehicles can also be added to the laminated glass 10. These signal signs can be controlled in zones and can achieve different colors.

[0063] The blocking layer 40 is disposed between the first area 116 and the second area 117. In other words, the blocking layer 40 is used to separate the light from the first area 116 and the second area 117, so as to prevent the light from interfering with each other and make the display pattern layer 20 in the first area 116 and the second area 117 independent of each other.

[0064] Specifically, the first region 116 is located in the central region of the laminated glass 10, and the second region 117 is located in the side region of the laminated glass 10.

[0065] The first zone 116 is located at or near the center of the laminated glass 10. The second zone 117 is located on the side of the laminated glass 10. The central region and the side region of the laminated glass 10 are adjacent to each other. Optionally, there may be one or more first zones 116. Optionally, there may be one or more second zones 117.

[0066] The side regions include a left side region located to the left of the central region, a right side region located to the right of the central region, an upper side region located above the central region, and a lower side region located below the central region. For example, the first region 116 is located in the central region of the laminated glass 10, and the second region 117 is located in the left side region of the laminated glass 10. Another example is that the first region 116 is located in the central region of the laminated glass 10, and the second region 117 is located in the right side region of the laminated glass 10. Yet another example is that the first region 116 is located in the central region of the laminated glass 10, and the second region 117 is located in the upper side region of the laminated glass 10. Still another example is that the first region 116 is located in the central region of the laminated glass 10, and the second region 117 is located in the lower side region of the laminated glass 10.

[0067] In one embodiment, there are two second zones 117, with the first zone 116 located between the two second zones 117 along the horizontal direction of the laminated glass 10.

[0068] For example, there is one first zone 116 and two barrier layers 40. One barrier layer 40 is disposed between one second zone 117 and one first zone 116, and the other barrier layer 40 is disposed between another second zone 117 and one first zone 116. One second zone 117, one first zone 116, and another second zone 117 are arranged along the horizontal direction of the laminated glass 10, and the barrier layers 40 are extended along the vertical direction of the laminated glass 10.

[0069] Furthermore, the display pattern layers 20 located in the two second zones 117 are arranged symmetrically along the central axis of the laminated glass 10.

[0070] For example, one second zone 117 has a left turn warning symbol, and the other second zone 117 has a right turn warning symbol. As another example, the first zone 116 located between the two second zones 117 has a brake light warning symbol.

[0071] This embodiment improves the vehicle's appearance by symmetrically arranging the display pattern layers 20 of the two second zones 117, and can serve as a backup for brake lights and turn signals, thus broadening the application scenarios of the display.

[0072] The refractive index of the optical waveguide layer 113 is greater than that of the blocking layer 40, and the light undergoes total internal reflection at the interface between the blocking layer 40 and the optical waveguide layer 113. The refractive index of the blocking layer 40 is ≤1.49.

[0073] Furthermore, the refractive index of the barrier layer 40 is equal to the refractive index of the first adhesive layer 112, and the refractive index of the barrier layer 40 is equal to the refractive index of the second adhesive layer 114.

[0074] Optionally, the material of the barrier layer 40 may be selected from at least one of polyvinyl butyral (PVB), polyurethane (PU), ethylene-vinyl acetate copolymer (EVA), TPU (thermoplastic polyurethane), and ionic polymer (SGP). Optionally, the material of the barrier layer 40 is the same as the material of the first adhesive layer 112, and the material of the barrier layer 40 is the same as the material of the second adhesive layer 114.

[0075] This embodiment limits the total internal reflection of light at the junction between the blocking layer 40 and the optical waveguide layer 113. This not only isolates the diverging light and confines the light within the partition, but also causes the light to be reflected back to the optical waveguide layer 113, reducing the loss of light propagation and thereby improving the brightness of the first light-emitting pattern and the display effect of the rear window assembly 1.

[0076] In another embodiment, the rear window assembly 1 further includes a light-emitting element 30 disposed around the laminated glass 10, the light-emitting element 30 being used to emit the light.

[0077] The light-emitting element 30 and the display pattern layer 20 are disposed on different sides of the laminated glass 10. For example, the light-emitting element 30 is disposed at an interval from the laminated glass 10, or the light-emitting element 30 is fixed to the laminated glass 10. Light rays enter the optical waveguide layer 113 from the light-emitting element 30, and the light rays entering the optical waveguide layer 113 have an angle with the normal direction of the optical waveguide layer 113.

[0078] In one embodiment, the light-emitting element 30 includes a light-emitting part and a collimating part. The collimating part is disposed between the light-emitting part and the laminated glass 10. The light-emitting part is used to emit light, and the collimating part is used to receive and make the light parallel to the light, and also to make the parallel light shine on the laminated glass 10.

[0079] The collimating section can convert divergent light rays into parallel light rays before directing them onto the laminated glass 10. For example, the collimating section can be a collimating lens. Specifically, when light rays from the self-emitting part reach the collimating section, the light rays are in a divergent state; then, the collimating section receives the light rays, converts the divergent light rays into parallel light rays, and directs the parallel light rays onto the laminated glass 10.

[0080] This embodiment reduces light propagation loss by providing a light-emitting part and a collimating part, allowing more light to enter the laminated glass 10, thereby increasing the brightness of the first light-emitting pattern and improving the display effect of the rear window assembly 1.

[0081] In another embodiment, the light-emitting element 30 is a light-emitting strip, which is disposed around the periphery of the laminated glass 10. For example, the light-emitting strip extends along the circumferential direction of the laminated glass 10. Alternatively, the light-emitting strip is mounted on the periphery of the laminated glass 10.

[0082] Light loss occurs during propagation of the laminated glass 10, which may result in inconsistent brightness in each display pattern layer 20. This embodiment compensates for the light propagation loss by providing light-emitting strips around the periphery of the laminated glass 10, thereby increasing the brightness of the first light-emitting pattern, improving the uniformity of brightness, and enhancing the display effect of the rear window assembly 1.

[0083] In another embodiment, the light-emitting element 30 includes a plurality of light-emitting sub-elements, which are spaced apart around the periphery of the laminated glass 10. For example, the spacing between two adjacent light-emitting sub-elements is equal. As another example, the laminated glass 10 includes a top end and a bottom end disposed opposite to each other, and the light-emitting sub-elements are disposed at the top end and / or the bottom end.

[0084] This embodiment, by setting multiple light-emitting sub-components, allows for flexible adjustment of the positions of the light-emitting sub-components to adapt to the position of the display pattern layer 20, thereby improving the display effect of the rear window assembly 1 and expanding the application scenarios of the display.

[0085] The light-emitting element 30 includes a plurality of light-emitting sub-elements, which are respectively disposed in the first region 116 and the second region 117.

[0086] Some light-emitting elements are disposed on the periphery of the laminated glass 10 in the first region 116, and other light-emitting elements are disposed on the periphery of the laminated glass 10 in the second region 117. Light from some of the light-emitting elements enters the optical waveguide layer 113 in the first region 116, and is then reflected by the display pattern layer 20 in the first region 116 to form a first light-emitting pattern. Light from the other portion of the light-emitting elements enters the optical waveguide layer 113 in the second region 117, and is then reflected by the display pattern layer 20 in the second region 117 to form another first light-emitting pattern.

[0087] Specifically, the laminated glass 10 includes a top end and a bottom end arranged opposite to each other, with some of the light-emitting elements disposed at the top end and / or bottom end of the first region 116, and the other part of the light-emitting elements disposed at the top end and / or bottom end of the second region 117.

[0088] For example, some light-emitting components are located at the top of the first region 116, and others are located at the top of the second region 117. Another example is that some light-emitting components are located at the bottom of the first region 116, and others are located at the bottom of the second region 117. Yet another example is that some light-emitting components are located at both the top and bottom of the first region 116, and others are located at both the top and bottom of the second region 117.

[0089] The light emitted from the light-emitting element 30 has a divergence angle θ1, which is ≤12°. Specifically, examples include 12°, 11°, 10°, 9°, 8°, 7°, 6°, and 5°. Preferably, the divergence angle θ1 is ≤10°, and more preferably, it is ≤8°. It should be noted that the divergence angle of light refers to the maximum angle between the light emitted from the light source and the reference axis during propagation. This embodiment, by limiting the divergence angle θ1 to ≤12°, reduces light propagation loss, allowing more light to enter the optical waveguide layer 113, thereby increasing the brightness of the first light-emitting pattern and improving the display effect of the rear window assembly 1.

[0090] The brightness of the light source is ≥25 cd, specifically 25 cd, 26 cd, 27 cd, 28 cd, 29 cd, 30 cd, 31 cd, 32 cd, 33 cd, 34 cd, 35 cd, 36 cd, 37 cd, 38 cd, 39 cd, or 40 cd, etc. Preferably, the brightness of the light source is ≥30 cd, and more preferably, the brightness of the light source is ≥35 cd. This embodiment improves the brightness of the first luminous pattern by limiting the brightness of the light source to ≥25 cd, thereby improving the display effect of the rear window assembly 1 and broadening the application scenarios of the display. For example, it can meet the ECE certification requirements of brake lights.

[0091] This application also provides a vehicle, the vehicle including a body and a rear window assembly as described above, the glass substrate being mounted at an opening in the body.

[0092] When laminated glass is installed on a vehicle, it serves as the vehicle's rear windshield. Optionally, the light-emitting elements of the rear windshield assembly are mounted on the vehicle body.

[0093] The vehicle provided in this application, by employing the rear windshield assembly provided in this application, achieves total internal reflection of light within the optical waveguide layer, confining its propagation within the waveguide layer. At this point, the light cannot be observed from either the inside or outside of the laminated glass. When light strikes the display pattern layer, the display pattern layer reflects the light out of the laminated glass, causing the pattern to emit light and forming a first luminous pattern. The user can observe the first luminous pattern from outside the vehicle to obtain display information. Furthermore, the remaining light continues to propagate within the optical waveguide layer. Therefore, the rear windshield assembly provided in this application achieves the illumination of complex patterns on the glass, eliminating the complex wiring of related technologies, reducing maintenance costs, improving the display effect of the rear windshield assembly, enhancing the vehicle's appearance, serving as a backup for brake lights, broadening the application scenarios of the display, improving vehicle reliability, and enhancing the user experience.

[0094] Unless otherwise stated or in case of conflict, the terms or phrases used in this application shall have the following meanings:

[0095] In this application, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0096] In this application, "one or more" refers to any one, any two, or any two or more of the listed items. "Several" refers to any two or more.

[0097] In this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0098] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0099] In this application, the terms "embodiment" and "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of these phrases in various locations throughout the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the various embodiments of this application can be arbitrarily combined to form another embodiment that does not depart from the spirit and scope of the technical solution of this application, provided there is no contradiction between them.

[0100] The above description represents some embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A rear windshield assembly, characterized in that, The rear window assembly includes laminated glass and a display pattern layer. The laminated glass includes a first glass plate, a first adhesive layer, an optical waveguide layer, a second adhesive layer, and a second glass plate stacked sequentially. The display pattern layer is disposed between the first adhesive layer and the optical waveguide layer, and / or between the second adhesive layer and the optical waveguide layer. The optical waveguide layer is used to propagate light, and the light undergoes total internal reflection in the optical waveguide layer. The display pattern layer is used to reflect the light to the outside of the laminated glass and form a first luminescent pattern, which is used for external observation of the vehicle. The rear window assembly further includes a blocking layer, which is disposed between the first adhesive layer and the second adhesive layer. The blocking layer and the optical waveguide layer are disposed in the same layer along the stacking direction perpendicular to the laminated glass. The blocking layer and the display pattern layer are staggered. The blocking layer is used to block light from the optical waveguide layer. The laminated glass includes a first region and a second region. The barrier layer is disposed corresponding to the gap between the first region and the second region. The display pattern layer is disposed in the first region and the second region respectively. The display pattern layer is used to form a first luminescent pattern in the first region and another first luminescent pattern in the second region.

2. The rear windshield assembly as described in claim 1, characterized in that, The first region is located in the middle region of the laminated glass, and the second region is located in the side region of the laminated glass.

3. The rear windshield assembly as described in claim 1, characterized in that, There are two second zones, and the first zone is located between the two second zones along the horizontal direction of the laminated glass.

4. The rear windshield assembly as described in claim 3, characterized in that, The display pattern layers located in the two second zones are symmetrically arranged along the central axis of the laminated glass.

5. The rear windshield assembly as described in claim 1, characterized in that, The refractive index of the optical waveguide layer is greater than that of the blocking layer, and the light rays undergo total internal reflection at the interface between the blocking layer and the optical waveguide layer.

6. The rear windshield assembly as described in claim 5, characterized in that, The refractive index of the barrier layer is equal to the refractive index of the first adhesive layer, and the refractive index of the barrier layer is equal to the refractive index of the second adhesive layer.

7. The rear windshield assembly as described in claim 1, characterized in that, The rear windshield assembly also includes a light-emitting element disposed on the periphery of the laminated glass, the light-emitting element being used to emit the light.

8. The rear window assembly as described in claim 7, characterized in that, The light-emitting element includes multiple light-emitting sub-elements, which are respectively disposed in the first area and the second area.

9. The rear window assembly as described in claim 8, characterized in that, The laminated glass includes a top end and a bottom end that are opposite to each other. Some of the light-emitting elements are located at the top end and / or bottom end of the first region, and the other part of the light-emitting elements are located at the top end and / or bottom end of the second region.

10. The rear window assembly as claimed in claim 7, characterized in that, The light emitted from the light-emitting element has a divergence angle θ1, wherein the divergence angle θ1 ≤ 12°.

11. The rear window assembly as claimed in claim 7, characterized in that, The light emitted from the light-emitting element has a divergence angle θ1, wherein the divergence angle θ1 ≤ 10°.

12. The rear window assembly as claimed in claim 7, characterized in that, The light emitted from the light-emitting element has a divergence angle θ1, wherein the divergence angle θ1 ≤ 8°.

13. The rear window assembly as claimed in claim 7, characterized in that, The brightness of the light is ≥25 cd.

14. The rear window assembly as claimed in claim 7, characterized in that, The brightness of the light is ≥30 cd.

15. The rear window assembly as claimed in claim 7, characterized in that, The brightness of the light is ≥35cd.

16. The rear window assembly as claimed in claim 7, characterized in that, The light-emitting element includes a light-emitting part and a collimating part. The collimating part is disposed between the light-emitting part and the laminated glass. The light-emitting part is used to emit the light, and the collimating part is used to receive the light and make the light parallel to the glass.

17. The rear window assembly as claimed in claim 1, characterized in that, The light rays incident on the display pattern layer undergo diffuse reflection, and the display pattern layer satisfies at least one of the following conditions: The roughness of the display pattern layer is Ra, which is 100nm~800nm; The visible light transmittance of the display pattern layer is ≥90%.

18. The rear window assembly as claimed in claim 1, characterized in that, The refractive index of the optical waveguide layer is greater than that of the first adhesive layer, and the refractive index of the optical waveguide layer is greater than that of the second adhesive layer.

19. The rear window assembly as claimed in claim 18, characterized in that, The refractive index of the optical waveguide layer is >1.

49.

20. The rear window assembly as claimed in claim 18, characterized in that, The refractive index of the optical waveguide layer is ≥1.

52.

21. The rear window assembly as claimed in claim 18, characterized in that, The refractive index of the optical waveguide layer is ≥1.

55.

22. The rear window assembly as claimed in claim 19, characterized in that, The light has an incident angle θ2, which is the angle between the light entering the optical waveguide layer and the normal direction of the laminated glass, and the incident angle θ2 ≥ 73°.

23. The rear window assembly as claimed in claim 1, characterized in that, The material of the optical waveguide layer is a polymer layer.

24. The rear window assembly as claimed in claim 1, characterized in that, The physical thickness of the optical waveguide layer is ≤0.76mm.

25. The rear window assembly as claimed in claim 1, characterized in that, The physical thickness of the optical waveguide layer is ≤0.57mm.

26. The rear window assembly as claimed in claim 1, characterized in that, The physical thickness of the optical waveguide layer is ≤0.38mm.

27. A vehicle, characterized in that, The vehicle includes a body and a rear window assembly as described in any one of claims 1-26, wherein the laminated glass is mounted at an opening in the body.

Images