Laminated glass with different visible light transmittance

Abstract

Provided is a laminated glass with different visible light transmittances. The laminated glass includes an outer glass sheet having opposing first and second surfaces, an inner glass sheet having opposing third and fourth surfaces, and a thermoplastic interlayer interposed between the inner and outer glass sheets for bonding the second and third surfaces together. At least a portion of the edge of the outer glass sheet extends beyond the inner glass sheet to form a single-glazed region, and the single-glazed region includes at least one light-transmitting functional region. The laminated glass can be used as front and rear glass for automobiles, and its misalignment structural design solves the technical problem of laminated glass causing optical distortion in optical modules.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority based on a Chinese patent application filed with the China Patent Office on October 24, 2022, bearing application number 202211301927.X and titled "Laminated glass with different visible light transmittances," the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the field of glass products, and in particular to laminated glass having different visible light transmittances. [Background technology]

[0003] With the widespread use of intelligent automobile technology, laminated glass, such as windshields or rear windshields, usually needs to be equipped with optical modules with various functions, such as camera sensors or brake lights, etc. Generally, such optical modules need to transmit or receive optical signals during operation.

[0004] However, because laminated glass itself is composed of two layers of glass, incident light is refracted by the two layers, resulting in the formation of ghost images and affecting the clarity of optical signals transmitted or received by optical modules. Furthermore, light must pass through at least two layers of glass during operation of an optical module. Glass typically undergoes heating processes such as bending and sintering, which can easily cause optical quality problems in the glass itself. Furthermore, two layers of glass are more likely to produce unpredictable optical distortions after being combined than single-layer glass, thereby affecting image resolution. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention aims to provide laminated glass with different visible light transmittances, which can easily and conveniently solve the technical problem of optical distortion caused by laminated glass on optical modules, and can protect the privacy and comfort of the vehicle interior without affecting the function of optical modules such as brake lights and cameras. [Means for solving the problem]

[0006] To achieve the above object, the present invention adopts the following technical solutions. The laminated glass having different visible light transmittances includes an outer glass sheet, a thermoplastic interlayer, and an inner glass sheet; the outer glass pane has opposing first and second surfaces; the inner glass pane has opposing third and fourth surfaces; the thermoplastic intermediate layer is interposed between the outer glass sheet and the inner glass sheet and serves to bond the second surface and the third surface; At least a part of the side of the outer glass sheet protrudes from the inner glass sheet, and the protruding portion is a single-layer glass region, and the single-layer glass region includes at least one light-transmitting functional region.

[0007] The laminated glass of the present invention can be used as a windshield or rear glass of an automobile. The inner and outer glass sheets are designed with an offset structure, with the outer glass sheet extending beyond the inner glass sheet to form a single-glazed area. A light-transmitting functional area for mounting optical modules such as brake lights and cameras is located inside the single-glazed area (the second surface of the outer glass sheet), thereby avoiding light distortion and satisfying the light transmission needs of these devices. Meanwhile, the other areas of the laminated glass are double-glazed, allowing for other functional needs to be met. For example, a tinted area or tinted film can be provided to meet the requirements for appearance and interior privacy.

[0008] In the laminated glass according to the present invention, the single-glazed region preferably has a first shielding layer on the second surface thereof in addition to the light-transmitting functional region, and a second shielding layer may or may not be provided on the third and / or fourth surfaces of the inner glass sheet. The second shielding layer is usually provided around the entire periphery, but this may be determined according to actual needs. The shielding layer shields circuits, connecting members, etc. at the edge of the laminated glass to improve the appearance.

[0009] In the laminated glass according to the present invention, the material of the first shielding layer and the second shielding layer is preferably ceramic ink or ultraviolet ink.

[0010] In the laminated glass according to the present invention, the first and second shielding layers preferably have a visible light transmittance of 1.5% or less and an ultraviolet light transmittance of 0.05% or less.

[0011] In the laminated glass of the present invention, at least a portion of the edge of the outer glass sheet protrudes from the inner glass sheet to form the single-layer glass region. "Protrusion" refers to the outer glass sheet being larger in size than the inner glass sheet. The protruding portion may be the entire periphery or a portion of the edge. Preferably, at least a portion of one side edge of the outer glass sheet protrudes from the inner glass sheet to form the single-layer glass region, and the protruding portion may be the entire side edge of the outer glass sheet or a portion of the side edge. When the laminated glass of the present invention is used as a windshield or rear glass, the side edge is preferably the upper edge of the glass.

[0012] In the laminated glass according to the present invention, in the single-layer glass region, d is the distance from the edge of the outer glass plate to the edge of the inner glass plate in the direction from the edge of the outer glass plate to the edge of the inner glass plate, d1 is the distance from the edge of the outer glass plate to the outer edge of the light-transmitting functional region, d2 is the distance from the outer edge to the inner edge of the light-transmitting functional region, and d3 is the distance from the inner edge of the light-transmitting functional region to the edge of the inner glass plate, where d is the distance from the edge of the outer glass plate to the edge of the inner glass plate.

[0013] Preferably, d1 is 10 mm to 150 mm. More preferably, d1 is 20 mm to 50 mm or 10 mm to 50 mm. Specifically, when the laminated glass is used as a windshield having a colored region, d1 is 20 mm to 50 mm, and when the laminated glass is used as a rear window, d1 is 10 mm to 50 mm.

[0014] Preferably, d2 is 20 mm to 150 mm. More preferably, d2 is 30 mm to 80 mm or 10 mm to 35 mm. Specifically, when the laminated glass is used as a windshield having a colored region, d2 is 30 mm to 80 mm, and when the laminated glass is used as a rear window, d2 is 10 mm to 35 mm.

[0015] Preferably, d3 is 0 to 50 mm. When d3 is 0, the light-transmitting functional region is close to the edge of the inner glass plate, and when d3 is not 0, the light-transmitting functional region does not contact the edge of the inner glass plate. More preferably, it does not contact. More preferably, d3 is 3 mm to 20 mm or 3 mm to 10 mm. Specifically, when the laminated glass is used as a windshield having a colored region, d3 is 3 mm to 20 mm, and when the laminated glass is used as a rear window, d3 is 3 mm to 10 mm.

[0016] The laminated glass of the present invention preferably includes a tinted area located in an area that does not overlap with the single-glazed area. The tinted area can provide sunlight blocking and ensure privacy inside the vehicle. The tinted area can be achieved by applying a tinted film or by using a thermoplastic polymer, such as PVB, with a different color and / or light transmittance in the thermoplastic interlayer.

[0017] More preferably, the colored region is located in a portion of the thermoplastic intermediate layer. Still more preferably, the material of the colored region is a dark PVB having a visible light transmittance of 10% or less or a light PVB having a visible light transmittance of 10% to 70%, and the material of the thermoplastic intermediate layer other than the colored region is a colorless PVB having a visible light transmittance of 70% or more.

[0018] In the laminated glass according to the present invention, the outer glass sheet is preferably subjected to a high-temperature bending treatment at a temperature of at least 500°C.

[0019] In the laminated glass according to the present invention, the inner glass sheet is preferably subjected to a high-temperature bending treatment at a temperature of at least 500°C.

[0020] The rigidity of a laminated glass is directly related to the thickness of the outer glass sheet. To ensure the overall rigidity of the combined laminated glass under the same process conditions (fully tempered, semi-tempered, heat-tempered, etc.), the present invention preferably uses a thickness of the outer glass sheet that is greater than that of the inner glass sheet. The thickness of the outer glass sheet is preferably 1.6 mm or more, such as 1.6 mm, 2.1 mm, 2.6 mm, 3.2 mm, 3.5 mm, 4.0 mm, 4.5 mm, or 5.0 mm, more preferably 3.2 mm, 3.5 mm, 4.0 mm, 4.5 mm, or 5.0 mm, and even more preferably 5.0 mm. The thickness of the inner glass sheet is preferably 0.7 mm to 2.6 mm, more preferably 0.7 mm to 2.1 mm, such as 0.7 mm, 1.1 mm, 1.6 mm, 1.8 mm, or 2.1 mm, and even more preferably 0.7 mm or 1.1 mm.

[0021] In the laminated glass of the present invention, the outer glass plate is preferably selected from clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, solar green glass with a visible light transmittance of 70% to 85.5%, and light gray or dark green glass with a visible light transmittance of 25% to 50%. More specifically, when the laminated glass of the present invention is used as a windshield, the outer glass plate is selected from clear glass with a visible light transmittance of 85% to 93%, ordinary green glass with a visible light transmittance of 73% to 88%, or solar green glass with a visible light transmittance of 70% to 85.5%. When the laminated glass of the present invention is used as a rear glass, the outer glass plate is selected from clear glass with a visible light transmittance of 85% to 93%, ordinary green glass with a visible light transmittance of 73% to 88%, solar green glass with a visible light transmittance of 70% to 85.5%, light gray glass with a visible light transmittance of 25% to 50%, or dark green glass.

[0022] In the laminated glass according to the present invention, the inner glass plate is preferably selected from clear glass having a visible light transmittance of 85% to 93%, green glass having a visible light transmittance of 73% to 88%, solar green glass having a visible light transmittance of 70% to 85.5%, light gray glass or dark green glass having a visible light transmittance of 25% to 50%, and dark gray glass or dark green glass having a visible light transmittance of 25% or less.

[0023] In the laminated glass of the present invention, a thermoplastic interlayer is interposed between the outer and inner glass sheets and bonds the second and third surfaces. This thermoplastic interlayer may be a single layer or two or more layers. For example, if two or more layers are used, one of the layers may have a higher plasticizer content to provide sound insulation, or one of the layers may be wedge-shaped to provide a head-up display (HUD) function. The thermoplastic interlayer may also have other functions. For example, it may have at least one colored region to reduce the visual disturbance of sunlight, or it may have an infrared absorber added to provide sun protection or heat insulation.

[0024] In the laminated glass according to the present invention, the material of the thermoplastic interlayer is preferably selected from polycarbonate (PC), polyvinyl chloride (PVC), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR), ionic polymer film (SGP), etc., and more preferably polyvinyl butyral (PVB). When the colored region is provided in a partial region of the thermoplastic interlayer, the material of the colored region is selected from dark-colored PVB with a visible light transmittance of 10% or less and light-colored PVB with a visible light transmittance of 10% to 70%. In this way, a light-blocking effect can be achieved and interference with sunlight on the human eye can be reduced. The material of the thermoplastic interlayer other than the colored region is colorless PVB with a visible light transmittance of 70% or more. In this way, the driver's field of vision is ensured and safe driving is not affected. The color of the colored region may be gray, green, blue, or brown, with gray or green being preferred, and gray being more preferred.

[0025] In the laminated glass according to the present invention, the thickness of the thermoplastic intermediate layer is preferably 0.3 mm to 2.3 mm, for example, 0.38 mm, 0.51 mm, 0.76 mm, 1.9 mm (total of three layers, each thickness 0.76 mm, 0.38 mm, and 0.76 mm), 1.52 mm (total of three layers, each thickness 0.76 mm, 0.38 mm, and 0.38 mm), more preferably 0.38 mm or 0.76 mm, and even more preferably 0.76 mm.

[0026] In a preferred embodiment of the present invention, the laminated glass is used as a windshield.

[0027] A camera is attached to the light-transmitting functional area. The single-glazed area has a first shielding layer on a second surface other than the light-transmitting functional area.

[0028] The outer glass plate is clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, or solar green glass with a visible light transmittance of 70% to 85.5%, which can ensure that the optical path of the camera passes through the outer glass plate and ensure the normal operation of the camera.

[0029] A portion of the thermoplastic intermediate layer is a colored region, and the material of the colored region is a dark-colored PVB with a visible light transmittance of 10% or less or a light-colored PVB with a visible light transmittance of 10% to 70%. This provides a shading effect and reduces the disruption of sunlight to the human eye. The material of the non-colored region is a colorless PVB with a visible light transmittance of 70% or more. This ensures the driver's field of vision and does not affect safe driving.

[0030] The inner glass sheet is clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, or solar green glass with a visible light transmittance of 70% to 85.5%. A second shielding layer may or may not be provided on a fourth surface of the inner glass sheet.

[0031] In a preferred embodiment of the present invention, the laminated glass is used as a rear glass.

[0032] A camera and / or a brake light are attached to the light-transmitting functional area. The single-glazed area has a first shielding layer provided on a second surface other than the light-transmitting functional area.

[0033] When a camera is installed in the light-transmitting area, the outer glass plate can be clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, or solar green glass with a visible light transmittance of 70% to 85.5%. This visible light transmittance ensures that the optical path of the camera passes through the outer glass plate, ensuring normal operation of the camera.

[0034] When a brake light is installed in the light-transmitting functional area, the outer glass plate is clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, sun green glass with a visible light transmittance of 70% to 85.5%, gray glass or dark green glass with a visible light transmittance of 25% to 40%, or light gray glass or dark green glass with a visible light transmittance of 40% to 65%.

[0035] The material of the thermoplastic intermediate layer is a dark color PVB with a visible light transmittance of 10% or less, a light color PVB with a visible light transmittance of 10% to 70%, or a colorless PVB with a visible light transmittance of 70% or more.

[0036] The inner glass plate is clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, sun green glass with a visible light transmittance of 70% to 85.5%, gray glass or dark green glass with a visible light transmittance of 25% to 50%, or dark gray glass or dark green glass with a visible light transmittance of 25% or less.

[0037] When the thermoplastic intermediate layer is a colored PVB having a visible light transmittance of 70% or less, the inner glass sheet is a colored glass or clear glass having a visible light transmittance of 70% or more, preferably a green glass having a visible light transmittance of 73% to 88%, more preferably a solar green glass having a visible light transmittance of 70% to 85.5%.

[0038] When the thermoplastic intermediate layer is a colorless PVB having a visible light transmittance of 70% or more, the inner glass sheet is a colored glass having a visible light transmittance of 70% or less, preferably a gray or dark green glass having a visible light transmittance of 25% to 50%. A second shielding layer may or may not be provided on the fourth surface of the inner glass sheet. [Effects of the Invention]

[0039] The laminated glass of the present invention can very simply and conveniently solve the technical problem of laminated glass causing optical distortion to optical modules by simply designing an offset structure so that a portion of the edge of the outer glass sheet protrudes beyond the inner glass sheet. Furthermore, by selecting tinted areas and glass substrates with different visible light transmittances, it is possible to achieve different visible light transmittances in the same glass window, thereby protecting the privacy and comfort of the vehicle interior and not affecting the function of optical modules such as brake lights and cameras. [Brief explanation of the drawings]

[0040] [Figure 1] FIG. 1 is a diagram showing a structure of laminated glass having different visible light transmittances in a preferred embodiment of the present invention. [Figure 2] Front view of laminated glass in a preferred embodiment of the present invention [Figure 3] Scatter plot of deformation of combinations of different types of laminated glass after impact [Figure 4] 1 is a diagram showing a preferred structure of the laminated glass of the present invention as a windshield having a colored region. [Figure 5] FIG. 1 is a diagram showing a preferred structure of the laminated glass of the present invention as a rear window. DETAILED DESCRIPTION OF THE INVENTION

[0041] In order to more clearly explain the present invention, the present invention will be further described below in combination with preferred embodiments. It should be understood that the specific description below is for illustrative purposes only, not for limiting purposes, and does not limit the scope of protection of the present invention.

[0042] The laminated glass of the present invention is designed with an offset structure to have a single-glazed area and a double-glazed area. Optical modules, such as cameras that operate according to the transmission spectrum, are installed in the single-glazed area, thereby solving the problem of light distortion and ensuring their light transmittance. Meanwhile, the double-glazed area is designed with a different visible light transmittance, which can block light and achieve privacy and aesthetic benefits without affecting the function of devices that operate according to the transmission spectrum.

[0043] The present invention provides a laminated glass having different visible light transmittances, which includes an outer glass sheet 1, a thermoplastic interlayer 2, and an inner glass sheet 3, as shown in Figure 1.

[0044] The outer glass pane 1 has first and second opposing surfaces 11 and 12 , and the inner glass pane 3 has third and fourth opposing surfaces 31 and 32 .

[0045] The thermoplastic intermediate layer 2 is interposed between the outer glass plate 1 and the inner glass plate 3 and serves to bond the second surface 12 and the third surface 31 together.

[0046] As shown in Figure 2, at least a portion of the edge of the outer glass sheet 1 protrudes from the inner glass sheet 3. The protruding portion is a single-glazed region 51, and the single-glazed region 51 includes at least one light-transmitting functional region 52. The protruding portion may be the entire periphery or a portion of the edge. For example, as shown in Figures 1 and 2, one side edge of the outer glass sheet 1 protrudes from the inner glass sheet 3 to form the single-glazed region 51. When the laminated glass is used as a windshield or rear glass, the side edge is preferably located at the top edge of the window glass.

[0047] 2, the single-glazed region 51 is preferably provided with a first shielding layer 41 on the second surface 12 in addition to the light-transmitting functional region 52. In some embodiments, the first shielding layer 41 may extend into the second surface 12 of the outer glass sheet 1 in a region other than the single-glazed region 51, and may be provided along the edge of the outer glass sheet 1 in a region other than the single-glazed region 51.

[0048] A second shielding layer 42 may or may not be provided on the third surface 31 or fourth surface 32 of the inner glass sheet 3. The second shielding layer 42 is usually provided around the edge of the inner glass sheet 3, but this may be determined according to actual needs. The first shielding layer 41 and the second shielding layer 42 are used to shield circuits, connecting components, etc. at the edge of the laminated glass, thereby achieving an aesthetic effect. Preferably, the first shielding layer 41 and the second shielding layer 42 are made of ceramic ink or UV ink. Preferably, the first shielding layer 41 and the second shielding layer 42 have a visible light transmittance of 1.5% or less and an UV transmittance of 0.05% or less.

[0049] In the single-glazed region 51, d is the distance from the edge of the outer glass sheet 1 to the edge of the inner glass sheet 3 in the direction from the edge of the outer glass sheet 1 to the edge of the inner glass sheet 3, d1 is the distance from the edge of the outer glass sheet 1 to the outer edge of the light-transmitting functional region 52, d2 is the distance from the outer edge to the inner edge of the light-transmitting functional region 52 (if the laminated glass is used as a windshield or rear windshield, d2 is the window height of the device attached thereto), and d3 is the distance from the inner edge of the light-transmitting functional region 52 to the edge of the inner glass sheet 3, where d = d1 + d2 + d3. d1 is 10 mm to 150 mm, and preferably 20 mm to 50 mm or 10 mm to 50 mm. Specifically, d1 is 20 mm to 50 mm when the laminated glass is used as a windshield, and d1 is 10 mm to 50 mm when the laminated glass is used as a rear windshield. d2 is 20 mm to 150 mm, and preferably 30 mm to 80 mm or 10 mm to 35 mm. Specifically, d2 is 30 mm to 80 mm when the laminated glass is used as a windshield, and 10 mm to 35 mm when the laminated glass is used as a rear windshield. d3 is 0 to 50 mm. When d3 is 0, the light transmitting functional region 52 is adjacent to the edge of the inner glass plate 3, and when d3 is not 0, the light transmitting functional region 52 and the edge of the inner glass plate 3 do not contact each other, as shown in FIG. 1 . More preferably, d3 is 3 mm to 20 mm or 3 mm to 10 mm. Specifically, when the laminated glass is used as a windshield, d3 is 3 mm to 20 mm, and when the laminated glass is used as a rear windshield, d3 is 3 mm to 10 mm.

[0050] Preferably, the outer glass sheet 1 and the inner glass sheet 3 are bent at a high temperature of at least 500°C. The rigidity of the laminated glass is directly related to the thickness of the outer glass sheet 1. In order to ensure the rigidity of the entire combined laminated glass under the same process conditions (fully tempered, semi-tempered, heat-tempered, etc.), the present invention preferably makes the thickness of the outer glass sheet 1 greater than that of the inner glass sheet 3. The thickness of the outer glass sheet 1 is preferably 1.6 mm or more, for example, 1.6 mm, 2.1 mm, 2.6 mm, 3.2 mm, 3.5 mm, 4.0 mm, 4.5 mm, or 5.0 mm, preferably 3.2 mm, 3.5 mm, 4.0 mm, 4.5 mm, or 5.0 mm, and more preferably 5.0 mm. The thickness of the inner glass plate 3 is preferably 0.7 mm to 2.6 mm, more preferably 0.7 mm to 2.1 mm, for example, 0.7 mm, 1.1 mm, 1.6 mm, 1.8 mm, or 2.1 mm, and further preferably 0.7 mm or 1.1 mm.

[0051] In the embodiment shown in FIG. 3, the inner and outer glass panes may be installed with asymmetric thicknesses. The asymmetric laminated glass combination of a 3.5mm outer glass pane, a 1.1mm inner glass pane, and a 0.76mm interlayer (L=3.5+1.1+0.76 in FIG. 2) has a total thickness of 5.36mm, while the symmetric laminated glass combination of a 2.6mm outer glass pane, a 2.6mm inner glass pane, and a 0.76mm interlayer (L=2.6+2.6+0.76 in FIG. 3) has a total thickness of 5.96mm. Comparing the two, the asymmetric laminated glass combination with a total thickness of 5.36mm is thinner than the asymmetric laminated glass combination with a total thickness of 5.96mm, but is significantly more rigid. Therefore, the asymmetric laminated glass combination can have high strength while maintaining a light weight. Furthermore, the present invention uses thicker outer glass panes to significantly increase the strength of the single-glazed area to meet application needs.

[0052] Furthermore, in the example shown in Figure 3, both the inner and outer glass layers used in the laminated glass combination are untempered glass. Although the strength of a single inner or outer glass layer is much lower than that of tempered glass with the same thickness, the present invention rationally configures the glass combination to achieve the strength of an asymmetric laminated glass combination (3.5mm outer glass + 1.1mm inner glass + 0.76mm interlayer) (L=3.5+1.1+0.76 in Figure 2) equivalent to that of a 3.5mm thick sheet tempered glass (T=3.5 in Figure 3).

[0053] As shown in FIG. 2, the laminated glass preferably further includes a tinted region 7 for blocking sunlight and ensuring privacy inside the vehicle. The tinted region 7 is located in an area that does not overlap with the single-glazed region 51 and may be realized by attaching a tinted film. Alternatively, the tinted region 7 may be realized by using a thermoplastic polymer material (e.g., PVB, PVC, PC, EVA, etc.) of a different color and / or light transmittance as a thermoplastic interlayer so that at least a portion of the thermoplastic interlayer has a tinted region. More preferably, the tinted region 7 is a portion of the thermoplastic interlayer, such as the tinted region 21 of the thermoplastic interlayer shown in FIG. 4. More preferably, the material of the tinted region 21 in the thermoplastic interlayer is a dark-colored PVB with a visible light transmittance of 10% or less or a light-colored PVB with a visible light transmittance of 10% to 70%. The material of the untinted region 22 in the thermoplastic interlayer is a colorless PVB with a visible light transmittance of 70% or more.

[0054] Here, if the laminated glass has a tinted region as the windshield, the tinted region can reduce the visible light transmittance of the glass and block sunlight, but at the same time, it also blocks the optical path of the camera in the windshield, preventing the camera from operating normally. If the laminated windshield does not have a tinted region, the visible light transmittance reaches 70% or more, which does not affect the operation of the camera, but it cannot block sunlight. If the laminated glass has a color film as the laminated rear glass, it can serve to improve the appearance and protect the privacy of the driver and passengers, but the color film reduces the visible light transmittance and prevents the brake light optical path from transmitting clearly through the rear glass. If the laminated rear glass does not have a color film, it does not affect the transmission of the brake light optical path through the rear glass, but it cannot serve to protect the appearance or the privacy of the interior of the vehicle. In contrast, the present invention has a single-pane glass region, so by installing optical modules such as cameras, sensors, or brake lights in the single-pane glass region, it is possible to avoid the adverse effects of the colored region on the optical elements. Furthermore, the colored region itself can achieve the functions of blocking sunlight and protecting privacy without affecting the optical signal transmission of the optical module.

[0055] The outer glass plate 1 is selected from transparent glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, solar green glass with a visible light transmittance of 70% to 85.5%, and light gray or dark green glass with a visible light transmittance of 25% to 50%. More specifically, when the laminated glass of the present invention is used as a windshield, the outer glass plate 1 is selected from transparent glass with a visible light transmittance of 85% to 93%, ordinary green glass with a visible light transmittance of 73% to 88%, or solar green glass with a visible light transmittance of 70% to 85.5%. When the laminated glass of the present invention is used as a rear glass, the outer glass plate 1 is selected from transparent glass with a visible light transmittance of 85% to 93%, ordinary green glass with a visible light transmittance of 73% to 88%, solar green glass with a visible light transmittance of 70% to 85.5%, light gray or dark green glass with a visible light transmittance of 25% to 50%.

[0056] The inner glass plate 3 is selected from clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, sun green glass with a visible light transmittance of 70% to 85.5%, light gray glass or dark green glass with a visible light transmittance of 25% to 50%, and dark gray glass or dark green glass with a visible light transmittance of 25% or less.

[0057] The thermoplastic interlayer 2 is interposed between the outer glass sheet 1 and the inner glass sheet 3 and serves to bond the second surface 12 and the third surface 31 together. The thermoplastic interlayer 2 may be a single layer or two or more layers. For example, if two or more layers are used, one of the layers may have a higher plasticizer content to provide sound insulation, or one of the layers may be wedge-shaped to provide a head-up display (HUD) function. The thermoplastic interlayer 2 may also have other functions. For example, it may have at least one colored region to reduce the visual disturbance of sunlight, or may have an infrared absorber added to provide sun protection or heat insulation.

[0058] The thermoplastic intermediate layer 2 is made of a material selected from polycarbonate (PC), polyvinyl chloride (PVC), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR), and ionic polymer film (SGP), and is preferably made of polyvinyl butyral (PVB). For example, the thermoplastic intermediate layer 2 may be made of one or a combination of dark-colored PVB with a visible light transmittance of 10% or less, light-colored PVB with a visible light transmittance of 10% to 70%, or colorless PVB with a visible light transmittance of 70% or more. The thermoplastic intermediate layer 2 may be colored entirely to form a colored region, or may be colored partially to form a colored region. The color of the colored region may be gray, green, blue, or brown, with gray or green being preferred, and gray being more preferred.

[0059] The thickness of the thermoplastic intermediate layer 2 is 0.3 mm to 2.3 mm, for example, 0.38 mm, 0.51 mm, 0.76 mm, 1.9 mm (three layers in total, each thickness 0.76 mm, 0.38 mm, and 0.76 mm), 1.52 mm (three layers in total, each thickness 0.76 mm, 0.38 mm, and 0.38 mm), more preferably 0.38 mm or 0.76 mm, and even more preferably 0.76 mm.

[0060] As shown in Figure 4, the laminated glass of the present invention is used as a windshield having a tinted region. A camera 6 is attached to the light-transmitting functional region 52. In this case, the top dimension of the outer glass plate 1 is larger than that of the inner glass plate 3, and the side portion protrudes from the inner glass plate 3 to form a single-layer glass region 51. d2 is the window height of the camera 6. d1 is 20 mm to 50 mm, d2 is 30 mm to 80 mm, and d3 is 3 mm to 20 mm. d = d1 + d2 + d3.

[0061] The thermoplastic intermediate layer 2 includes a colored region and an uncolored region. The colored region 21 in the thermoplastic intermediate layer is made of a dark-colored PVB with a visible light transmittance of 10% or less or a light-colored PVB with a visible light transmittance of 10% to 70%, which provides a shading effect and reduces the interference of sunlight with the human eye. The uncolored region 22 in the thermoplastic intermediate layer is made of a colorless PVB with a visible light transmittance of 70% or more, which ensures the driver's field of vision and does not affect safe driving. The colored region 21 in the thermoplastic intermediate layer has a width t, which is measured from the outer boundary of the inner glass plate 3 to the upper boundary of region B of the optical section. In this case, the colored region does not affect the light transmittance of the light-transmitting functional region 52, ensuring the functionality of the camera 6 attached there, which operates based on the transmitted spectrum.

[0062] The outer glass plate 1 is made of transparent glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, or solar green glass with a visible light transmittance of 70% to 85.5%. This visible light transmittance ensures that the optical path of the camera passes through the outer glass plate 1, ensuring normal operation of the camera. The inner glass plate 3 is made of transparent glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, or solar green glass with a visible light transmittance of 70% to 85.5%. A second shielding layer may or may not be provided on the fourth surface 32 of the inner glass plate 3, as needed.

[0063] 5, when the laminated glass of the present invention is used as a rear window, a camera and / or brake light 6 is attached to the light-transmitting functional area 52. d1 is 10 mm to 50 mm, d2 is 10 mm to 35 mm, and d3 is 3 mm to 10 mm.

[0064] When a camera is attached to the light-transmitting functional area 52, the outer glass plate 1 is made of clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, or solar green glass with a visible light transmittance of 70% to 85.5%. This visible light transmittance ensures that the optical path of the camera passes through the outer glass plate 1, ensuring normal operation of the camera.

[0065] When a brake light is attached to the light-transmitting functional area 52, the outer glass plate 1 is clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, sun green glass with a visible light transmittance of 70% to 85.5%, gray glass or dark green glass with a visible light transmittance of 25% to 40%, or light gray glass or dark green glass with a visible light transmittance of 40% to 65%.

[0066] The material of the thermoplastic intermediate layer 2 is a dark PVB with a visible light transmittance of 10% or less, a light PVB with a visible light transmittance of 10%-70%, or a colorless PVB with a visible light transmittance of 70% or more.

[0067] The inner glass plate 3 is clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, sun green glass with a visible light transmittance of 70% to 85.5%, gray glass or dark green glass with a visible light transmittance of 25% to 50%, or dark gray glass or dark green glass with a visible light transmittance of 25% or less.

[0068] When the thermoplastic intermediate layer 2 is a colored PVB having a visible light transmittance of 70% or less, the inner glass plate 3 is a colored glass or a transparent glass having a visible light transmittance of 70% or more, preferably a green glass having a visible light transmittance of 73% to 88%, more preferably a solar green glass having a visible light transmittance of 70% to 85.5%.

[0069] When the thermoplastic intermediate layer 2 is a colorless PVB having a visible light transmittance of 70% or more, the inner glass plate 3 is a colored glass having a visible light transmittance of 70% or less, preferably a gray glass or a dark green glass having a visible light transmittance of 25% to 50%. A second shielding layer may or may not be provided on the fourth surface 32 of the inner glass plate 3, as necessary.

[0070] <Example> Example 1 This example specifically provided a laminated glass combination as a windshield with a tinted area.

[0071] The laminated glass combination was 2.6 SG (outer glass pane: 2.6 mm thick solar green glass) + 0.76 PVB (0.76 mm thick film with tinted areas) + 1.1C (inner glass pane: 1.1 mm clear glass). The first barrier layer was ink.

[0072] Here, d1 = 20 mm, d2 = 65 mm, and d3 = 10 mm, so d = d1 + d2 + d3 = 95 mm. The colored area extends from the edge of the inner glass plate 3 to the upper boundary of the visible area B of the glass. In this example, the upper boundary of area B is 150 mm away from the boundary of the outer glass plate, so the width of the colored area is 150 mm - 95 mm = 55 mm.

[0073] The overall thickness of the laminated glass in this example was 4.46 mm, and the thickness of the single-layer glass region was 2.6 mm. An optical module such as a camera or sensor was attached to the 2.6 mm single-layer glass region. The single-layer glass region had smaller optical distortion than the laminated outer and inner glass sheets, which improved the imaging effect of the optical module.

[0074] The visible light transmittance of the camera area (i.e., the light-transmitting functional area 52) and the viewing area (i.e., the area corresponding to the uncolored thermoplastic intermediate layer) was 76% to 80%. Here, the camera area and the viewing area had high visible light transmittance, which ensured that the optical module and the driver could receive external image information more clearly, avoiding the obstruction of the driver's field of vision or the impact on the imaging clarity of the optical module due to too low visible light transmittance.

[0075] The visible light transmittance of the colored area was 5% to 30%, and the low visible light transmittance of the colored area prevented the dazzling light from affecting the driver's normal field of vision, thereby achieving a glare prevention effect.

[0076] Example 2 This example specifically provided a laminated glass combination as a windshield with a tinted area.

[0077] The laminated glass combination was 3.2 SG (outer glass sheet, 3.2 mm thick solar green glass) + 0.76 PVB (0.76 mm thick film with colored areas) + 1.1C (inner glass sheet, 1.1 mm thick clear glass). The first shielding layer was ink.

[0078] Here, d1 = 25 mm, d2 = 60 mm, and d3 = 15 mm, so d = d1 + d2 + d3 = 100 mm. The colored area extends from the edge of the inner glass plate 3 to the upper boundary of the visible area B of the glass. In this example, the upper boundary of area B is 155 mm away from the boundary of the outer glass plate, so the width of the colored area is 155 mm - 100 mm = 55 mm.

[0079] The overall thickness of the laminated glass in this example was 5.06 mm, and the thickness of the single-layer glass area was 3.2 mm. An optical module such as a camera or sensor was attached to the 3.2 mm single-layer glass area. The single-layer glass area had smaller optical distortion than the laminated outer and inner glass sheets, which improved the imaging effect of the optical module.

[0080] The visible light transmittance of the camera area and the viewing area was 71% to 75%. Here, the high visible light transmittance of the camera area and the viewing area ensured that the optical module and the driver could receive external image information more clearly, avoiding the obstruction of the driver's field of vision or the impact on the imaging clarity of the optical module due to too low visible light transmittance.

[0081] The visible light transmittance of the colored area was 5% to 30%, and the low visible light transmittance of the colored area prevented the dazzling light from affecting the driver's normal field of vision, thereby achieving a glare prevention effect.

[0082] Example 3 This example specifically provided a laminated glass as a rear glass having a tinted region.

[0083] The glass combination was 2.6 SG (outer glass pane, 2.6 mm thick solar green glass) + 0.76 PVB (0.76 mm thick regular untinted PVB) + 1.6 dark green (inner glass pane, 1.6 mm thick dark green glass).

[0084] However, since d1 = 15 mm, d2 = 10 mm, and d3 = 5 mm, d = d1 + d2 + d3 = 30 mm.

[0085] The total thickness of the laminated glass in this example was 4.96 mm. The thickness of the single-pane glass area was 2.6 mm. An optical module such as a camera, sensor, or brake light was attached to the 2.6 mm single-pane glass area. The single-pane glass area had smaller optical distortion than the laminated outer and inner glass sheets, which could improve the imaging effect of the optical module or the light transmission effect of the brake light, allowing rearward vehicles to more clearly see whether the brake lights were on.

[0086] The visible light transmittance of the camera or brake light area (light-transmitting functional area 52) was 75% to 80%. The high visible light transmittance of the camera or brake light area ensured that the optical module, such as the camera or brake light, could receive external image information or emit optical signals more clearly, while the high visible light transmittance of the viewing area allowed the driver to more clearly observe the situation of the vehicle behind in the viewing area of ​​the rear window through the rearview mirror.

[0087] The visible light transmittance of the other areas was 35% to 45%. Since the other areas had low visible light transmittance, it was possible to prevent peeping and protect the privacy of the driver and passengers.

[0088] Example 4 This example specifically provided a laminated glass as a rear glass having a tinted region.

[0089] The glass combination was 3.5C (outer glass pane, 3.5 mm thick clear glass) + 0.76 PVB (0.76 mm thick gray PVB) + 1.1C (inner glass pane, 1.1 mm thick clear glass).

[0090] However, since d1 = 20 mm, d2 = 15 mm, and d3 = 8 mm, d = d1 + d2 + d3 = 43 mm.

[0091] The total thickness of the laminated glass in this example was 5.36 mm. The thickness of the single-pane glass area was 5.36 mm. An optical module such as a camera, sensor, or brake light was attached to the 5.36 mm single-pane glass area. The single-pane glass area has smaller optical distortion than the laminated outer and inner glass sheets, which can improve the imaging effect of the optical module or the light transmission effect of the brake light, so that rearward vehicles can more clearly see whether the brake lights are on.

[0092] The visible light transmittance of the camera or brake light area was 88% to 92%. The high visible light transmittance of the camera or brake light area ensured that the optical module, such as the camera or brake light, could receive external image information or emit optical signals more clearly, while the high visible light transmittance of the viewing area allowed the driver to more clearly observe the situation of the vehicle behind in the viewing area of ​​the rear window through the rearview mirror.

[0093] The visible light transmittance of the other areas was 15% to 25%. Since the other areas had low visible light transmittance, it was possible to prevent peeping and protect the privacy of the driver and passengers.

[0094] The above examples of the present invention are merely given as examples to clearly explain the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art may make other different types of changes or modifications based on the above description, and it is not possible to cover all embodiments here, and obvious changes or modifications extracted by the technical solutions of the present invention fall within the protection scope of the present invention. [Explanation of symbols]

[0095] 1 outer glass plate 11 1st surface 12 Second surface 2 Thermoplastic Interlayer 21 Thermoplastic Interlayer Colored Area 22 Non-pigmented area of ​​thermoplastic interlayer 3 Inner glass plate 31 Third surface 32 4th surface 41 1st shielding layer 42 Second shielding layer 51 Single-glazed area 52 Light transmission functional area 6 Cameras, brake lights 7 Colored area

Claims

1. Laminated glass having different visible light transmittances, It comprises an outer glass pane (1), a thermoplastic interlayer (2), and an inner glass pane (3), The outer glass pane (1) has a first surface (11) and a second surface (12) opposite to each other; The inner glass pane (3) has opposing third and fourth surfaces (31 and 32), the thermoplastic intermediate layer (2) is interposed between the outer glass sheet (1) and the inner glass sheet (3) and serves to bond the second surface (12) and the third surface (31); At least a part of the edge of the outer glass sheet (1) protrudes from the inner glass sheet (3), and the protruding portion is a single-layer glass region (51), and the single-layer glass region (51) includes at least one light-transmitting functional region (52). Laminated glass characterized by:

2. The single-layer glass region (51) has a first shielding layer (41) on the second surface (12) in addition to the light-transmitting functional region (52), a second shielding layer (42) is provided on the third surface (31) and / or the fourth surface (32) of the inner glass sheet (3); The laminated glass according to claim 1 .

3. The single-layer glass region (51) has a first shielding layer (41) on the second surface (12) in addition to the light-transmitting functional region (52), The third surface (31) and / or the fourth surface (32) of the inner glass sheet (3) is not provided with a second shielding layer (42). The laminated glass according to claim 1 .

4. 4. The laminated glass according to claim 2 or 3, wherein the material of the first and second shielding layers is ceramic ink or ultraviolet ink.

5. 4. The laminated glass according to claim 2 or 3, wherein the first shielding layer (41) and the second shielding layer (42) have a visible light transmittance of 1.5% or less and an ultraviolet light transmittance of 0.05% or less.

6. 2. The laminated glass according to claim 1, wherein at least a part of one side edge of the outer glass sheet (1) extends beyond the inner glass sheet (3) to form the single-glazed region (51).

7. In the single-layer glass region (51), in the direction from the edge of the outer glass plate (1) to the edge of the inner glass plate (3), the distance from the edge of the outer glass plate (1) to the edge of the inner glass plate (3) is d, the distance from the edge of the outer glass plate (1) to the outer edge of the light-transmitting functional region (5) is d1, the distance from the outer edge to the inner edge of the light-transmitting functional region (5) is d2, and the distance from the inner edge of the light-transmitting functional region (5) to the edge of the inner glass plate (3) is d3, where d = d1 + d2 + d3. The laminated glass according to claim 1 .

8. 8. The laminated glass according to claim 7, wherein d1 is 10 mm to 150 mm, d2 is 20 mm to 150 mm, and d3 is 0 to 50 mm.

9. d1 is 20 mm to 50 mm or 10 mm to 50 mm; The laminated glass according to claim 7 or 8,

10. 9. The laminated glass according to claim 7 or 8, wherein d2 is 30 mm to 80 mm or 10 mm to 35 mm.

11. The laminated glass according to claim 7 or 8, wherein d3 is 3 mm to 20 mm or 3 mm to 10 mm.

12. 2. The laminated glass according to claim 1, further comprising a tinted area (7) located in an area that does not overlap the single-glazed area (51).

13. 13. The laminated glass according to claim 12, characterized in that the colored area (7) is located in a partial area of ​​the thermoplastic interlayer (2).

14. The material of the colored region (21) in the thermoplastic intermediate layer is a dark color PVB having a visible light transmittance of 10% or less or a light color PVB having a visible light transmittance of 10% to 70%, The material of the non-colored region (22) in the thermoplastic intermediate layer is colorless PVB having a visible light transmittance of 70% or more. The laminated glass according to claim 13 .

15. 2. The laminated glass according to claim 1, wherein both the outer glass sheet (1) and the inner glass sheet (3) have been subjected to a high-temperature bending treatment at a temperature of at least 500°C.

16. 2. The laminated glass according to claim 1, wherein the thickness of the outer glass sheet (1) is 1.6 mm or more, the thickness of the inner glass sheet (3) is 0.7 mm to 2.6 mm, and the thickness of the outer glass sheet is greater than the thickness of the inner glass sheet.

17. 2. The laminated glass according to claim 1, wherein the outer glass sheet (1) is selected from the group consisting of clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, sun green glass with a visible light transmittance of 70% to 85.5%, and light gray or dark green glass with a visible light transmittance of 25% to 50%.

18. 2. The laminated glass according to claim 1, wherein the inner glass sheet (3) is selected from the group consisting of clear glass with a visible light transmittance of 85% to 93%, green glass with a visible light transmittance of 73% to 88%, sun green glass with a visible light transmittance of 70% to 85.5%, light gray glass or dark green glass with a visible light transmittance of 25% to 50%, and dark gray glass or dark green glass with a visible light transmittance of 25% or less.

19. 2. The laminated glass according to claim 1, wherein the thickness of the thermoplastic intermediate layer (2) is between 0.3 mm and 2.3 mm.

20. 2. The laminated glass according to claim 1, wherein the outer glass sheet (1) and the inner glass sheet (3) are both non-tempered glass.

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