CN111703151A - A kind of laminated insulating glass with partial high infrared transmission - Google Patents

Abstract

The invention relates to the field of glass products, in particular to front windshields installed on automobiles, and in particular provides a laminated insulating glass with local high infrared transmission that can be used in conjunction with laser radar and/or infrared cameras. The laminated insulating glass includes a high infrared transmission area formed by the first transparent nano film and a low infrared transmission area formed by the second transparent nano film, and the high infrared transmission area has at least 92 in the wavelength range of 850-1550 nm. % transmittance, the infrared low transmittance region has a transmittance of at most 25% in the wavelength range of 780 to 2500 nm. The invention can make the total solar energy transmittance of the laminated heat insulating glass not exceed 55%, and meet the use requirement that the attenuation of the signal of the laser radar or infrared camera through the laminated heat insulating glass is not higher than 3dB, ensuring that the laser radar or infrared The normal operation of the camera can significantly reduce the energy consumption of the air conditioner and improve the comfort of the driver and passengers.

Description

A kind of laminated insulating glass with partial high infrared transmission

Technical field:

The invention relates to the field of glass products, in particular to front windshields installed on automobiles, and specifically provides a laminated heat-insulating glass with local high infrared transmission that can be used in conjunction with laser radar and/or infrared cameras.

Background technique:

With the rise of intelligent and connected vehicles, multi-function cameras (MFK) have become a must for high-end models. Due to the gradual popularization of intelligent driving, the definition of multi-function cameras in cars has also been greatly improved, and even sensors such as lidar have been added. Installed on the inner side of the car's front windshield, these have higher requirements on the light transmittance, diopter and curvature radius of the front windshield in the area where the multi-function camera or lidar is located.

The car front windshield is usually laminated glass, which includes an outer glass panel, a thermoplastic intermediate layer and an inner glass panel. When the multi-function camera or lidar is installed on the inner surface of the inner glass panel, the signal data of the multi-function camera or lidar The emission and/or reception needs to pass through the outer glass sheet, thermoplastic interlayer and inner glass sheet, since both the glass itself and the thermoplastic interlayer (e.g. PVB) absorb infrared, for 905nm lidar, 1550nm lidar and 850-1400nm infrared For cameras, traditional laminated glass will hinder the transmission of signal data of lidar and infrared cameras, thus affecting the normal operation of lidar and infrared cameras, and the actual adaptation effect is not ideal. In addition, in order to improve the safety and comfort of automobile driving, more and more automobile glass has electric heating function or thermal insulation function, which can be achieved by depositing metal film layer or transparent conductive oxide film on the surface of automobile glass. Because the metal film layer or the transparent conductive oxide film layer has the characteristics of reflecting infrared rays, the automobile glass with electric heating function or heat insulation function has a greater obstacle to the transmission of signal data from lidar and infrared cameras.

In order to solve the problem that the traditional laminated glass hinders the signal data transmission of the lidar or infrared camera, the patent CN101678651A in the prior art discloses a laminated vehicle window glass suitable for use with an optical sensor (such as a LIDAR type sensor), the laminated vehicle The glazing comprises first and second glazing material layers joined together by an interlayer material layer therebetween, the first glazing material layer being a bulk tinted glass sheet, the glazing It has a transmittance of at least 30% in the wavelength range of 400-2100nm, and the window glass has a transmittance of at least 32% in the wavelength range of 750-1300nm, which is still not available for lidar or infrared cameras. Practical use value; there is also a patent CN101037099A which discloses a device and method for installing an infrared camera with an outward viewing angle in a car, installing a plastic insert with an infrared perspective part into the through hole of the windshield, the technical solution destroys The integrity of the outer surface of the front windshield will reduce the safety to a certain extent, and the laminated glass with through holes has process problems such as large lamination difference and difficult vacuuming in actual production.

Invention content:

The technical problem to be solved by the present invention is to provide a laminated heat-insulating glass with high partial infrared transmission in view of the disadvantage that the actual adaptation effect of traditional laminated glass and laser radar or infrared camera is not ideal.

The technical scheme adopted by the present invention to solve the technical problem is as follows: a laminated heat-insulating glass with local high infrared transmission, comprising an outer glass plate, an inner glass plate and a thermoplastic intermediate layer sandwiched between the outer glass plate and the inner glass plate , the outer glass plate has a first surface and a second surface, the inner glass plate has a third surface and a fourth surface, the second surface and the third surface face each other, and the laminated insulating glass has a top edge and a bottom edge, at least one of the outer glass plate and the inner glass plate has a transmittance of at least 90% in the wavelength range of 850-1550 nm;

A first transparent nano-film is arranged on the fourth surface, a second transparent nano-film is arranged on the second surface, the third surface and/or the fourth surface, and the first transparent nano-film is in the interlayer spacer A high infrared transmission area is formed on the hot glass, and the infrared high transmission area has a transmittance of at least 92% in the wavelength range of 850-1550 nm;

The second transparent nano-film forms an infrared low transmission area on the laminated heat insulating glass, and the infrared low transmission area has a transmittance of at most 25% in the wavelength range of 780-2500 nm.

Preferably, the infrared high transmittance region has a transmittance of at least 94% in the wavelength range of 850-1550 nm.

Preferably, the outer glass plate and the inner glass plate are both ultra-white float glass.

Preferably, the first transparent nano-film includes at least one layered structure of high refractive index layer/low refractive index layer, the refractive index of the high refractive index layer is 1.9-2.6, and the refractive index of the low refractive index layer is 1.9-2.6 is 1.3-1.8, the second transparent nano film includes at least one metal silver layer, silver alloy layer or transparent conductive oxide layer.

Preferably, the attenuation of the signal in the wavelength range of 850-1550 nm by the high infrared transmission region is not higher than 3dB, and the total solar energy transmittance of the low infrared transmission region is not more than 55%.

Preferably, the infrared high transmission area extends from the top edge to the bottom edge, the infrared high transmission area has a lower edge; the infrared low transmission area extends from the bottom edge to the infrared high transmission area The lower edge of the transmission area extends, and the infrared low transmission area has an upper edge; the distance between the lower edge of the infrared high transmission area and the upper edge of the infrared low transmission area is L, -5mm≤ L≤5mm.

More preferably, the distance between the lower edge of the infrared high transmission area and the upper edge of the infrared low transmission area is L, where -2mm≤L≤2mm.

Preferably, the infrared low transmittance region formed by the second transparent nano-film comprising two metallic silver layers or silver alloy layers has a transmittance of at most 20% in the wavelength range of 780-2500 nm, comprising three metallic silver layers or silver alloy layers The infrared low transmittance region formed by the second transparent nano-film of the alloy layer has a transmittance of at most 5% in the wavelength range of 780-2500 nm.

Preferably, the portion of the thermoplastic intermediate layer corresponding to the first transparent nano-film is colored, so that the visible light transmittance of the high infrared transmittance region is less than or equal to 20%.

Preferably, the portion of the thermoplastic intermediate layer corresponding to the first transparent nano-film is gradually colored, so that the visible light transmittance of the high infrared transmittance region is greater than or greater than that of the end closest to the low infrared transmittance region. Equal to 70% gradient to less than or equal to 20% closest to the top edge.

Preferably, the second transparent nano-film is disposed on the second surface and/or the third surface, the second transparent nano-film further comprises at least one extension protruding toward the upper edge, the extension The portion overlaps with at least a portion of the first transparent nanofilm.

More preferably, at least one film removal line is provided in at least one extension.

Preferably, the infrared low transmittance area covers at least the main viewing area of the laminated insulating glass, and the visible light transmittance of the infrared low transmittance area is greater than or equal to 70%.

The present invention has the following beneficial effects due to taking the above-mentioned technical scheme:

The laminated heat-insulating glass used in the present invention can realize that the automobile glass can meet the communication requirements of high-sensitivity communication sensors such as laser radar and infrared cameras, and can also meet the heat-insulating requirements, so that the total solar transmittance (TTS) of the laminated heat-insulating glass does not exceed 55 %, and meet the requirement that the attenuation of the signal of the lidar or infrared camera through the laminated insulating glass is not higher than 3dB, to ensure the normal operation of the lidar or infrared camera, and to improve the accuracy of the use of the lidar or infrared camera At the same time, it can significantly reduce air conditioning energy consumption and improve driver and passenger comfort.

Description of drawings:

1 is a schematic cross-sectional view of the laminated insulating glass according to the present invention;

2 is a schematic top view of the laminated insulating glass according to the present invention;

3 is a schematic diagram of a gap between the infrared high transmission area and the infrared low transmission area according to the present invention;

FIG. 4 is a schematic diagram of an overlap between the infrared high transmission area and the infrared low transmission area according to the present invention;

5 is a schematic structural diagram of the second transparent nano-film according to the present invention located on the third surface;

6 is a schematic structural diagram of the second transparent nano-film of the present invention located on the fourth surface;

FIG. 7 is a schematic structural diagram of the second transparent nano-film having an extension according to the present invention.

Detailed ways:

The content of the present invention will be further described below with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2 , the laminated heat-insulating glass with local high infrared transmission according to the present invention can be used in conjunction with a laser radar and/or an infrared camera. The laminated heat-insulating glass includes an outer glass plate 1, The inner glass panel 2 having a first surface 11 and a second surface 12 and the thermoplastic interlayer 3 sandwiched between the outer glass panel 1 and the inner glass panel 2, the inner glass panel 2 having a third A surface 21 and a fourth surface 22, the second surface 12 and the third surface 21 facing each other, the thermoplastic intermediate layer 3 bonding the second surface 12 and the third surface 21 together; generally, the The outer glass panel 1 is located outside the vehicle, and the inner glass panel 2 is located inside the vehicle. The laminated insulating glass has a top edge 100 and a bottom edge 101, the top edge 100 is the side close to the roof after the laminated insulating glass is installed in the opening of the car body, and the bottom edge 101 is the interlayer The side of the insulating glass close to the ground after being installed in the body opening of the car. Among them, the lidar can measure the size, distance, speed, acceleration and other information of other objects in the surrounding environment of the car, and can even draw a three-dimensional space map around the car, etc. 850nm lidar, 905nm lidar, 940nm lidar can be selected , 1550nm lidar, etc.; the infrared camera can assist in the realization of Lane Departure Warning (LDW), Forward Collision Warning (FCW), Traffic Sign Recognition (TSR), Lane Keeping Assist (LKA), Pedestrian Collision Warning (PCW), infrared For night vision (NVS) and other functions, 850-1400nm near-infrared cameras can be selected.

In the present invention, preferably at least one of the outer glass plate 1 and the inner glass plate 2 has a transmittance of at least 90% in the wavelength range of 850-1550 nm, and ultra-white float glass can be selected. Both the glass plate 1 and the inner glass plate 2 are ultra-white float glass. At the same time, it is also preferable that the thickness of the outer transparent plate 1 is less than or equal to 2.3 mm, the thickness of the inner transparent plate 2 is less than or equal to 2.3 mm, and the thickness of the inner transparent plate 2 is less than or equal to the thickness of the outer transparent plate 1 thickness.

In order to meet the requirement of good matching effect between the lidar and/or infrared camera and the laminated glass of the automobile, and at the same time to make the laminated glass of the automobile have the function of heat insulation, in the present invention, the first transparent nano-film 4 is preferably arranged on the fourth surface 22. , a second transparent nano-film 5 is arranged on the second surface 12, the third surface 21 and/or the fourth surface 22, and the first transparent nano-film 4 forms a high infrared transmittance on the laminated insulating glass zone 102, the infrared high transmittance zone 102 has a transmittance of at least 92% in the wavelength range of 850-1550nm, more preferably at least 94%; the second transparent nano-film 5 is in the interlayer An infrared low transmission area 103 is formed on the insulating glass, and the infrared low transmission area 103 has a transmittance of at most 25% in the wavelength range of 780-2500 nm.

Wherein, the first transparent nano film 4 covers the upper area of the laminated insulating glass to form the infrared high transmission area 102 , that is, the infrared high transmission area 102 extends from the top edge 100 to the bottom The edge extends, the infrared high transmission area 102 has a lower edge 41; the infrared high transmission area 102 has a high transmittance for signals in the wavelength range of 850-1550 nm, which satisfies the signal transmission of lidar or infrared camera. The attenuation of the above-mentioned laminated insulating glass is not higher than the use requirement of 3dB, which ensures the normal operation of the laser radar or infrared camera, and improves the use accuracy of the laser radar or infrared camera. FIG. 2 shows that the three dashed boxes 104 located in the infrared high transmission area 102 can represent the signal transmission area of the lidar and the signal transmission area of the infrared camera.

The first transparent nano-film 4 is used to increase the transmittance of the laminated insulating glass in the wavelength range of 850-1550 nm, so as to form the infrared high transmission area 102 on the laminated insulating glass. The transparent nanofilm 4 includes at least one layered structure of high refractive index layer/low refractive index layer, preferably the refractive index of the high refractive index layer is 1.9-2.6, and the refractive index of the low refractive index layer is 1.3-1.8, Through the design of the laminated structure of the high refractive index layer/low refractive index layer, the reflectivity and/or absorptivity of the infrared high transmission region 102 in the wavelength range of 850-1550 nm can be reduced, thereby improving the transmittance; Meanwhile, it is also preferred that the material of the high refractive index layer is selected from at least one of ZnSe, TiO2, ZnS, Ta2O5, Ti3O5, ZrO2, HfO2, Ge, Nb2O5 and Si3N4, and the material of the low refractive index layer is selected from MgF2 , at least one of SiO2, Al2O3, MgO, AlF3, YbF3, YF3, BaF2, CeF2, Na3AlF6 and BaYF3.

Wherein, the second transparent nano film 5 covers the lower area of the laminated insulating glass to form the infrared low transmission area 103 , that is, the infrared low transmission area 103 extends from the bottom edge 101 to the infrared The lower edge 41 of the high transmission area 102 extends, and the infrared low transmission area 103 has an upper edge 51 ; the infrared low transmission area 103 at least covers the main viewing area of the laminated insulating glass, and the infrared low transmission area 103 at least covers the main viewing area of the laminated insulating glass. The transmittance of visible light (within the wavelength range of 380-780 nm) of the passing area 103 is greater than or equal to 70%, so as to meet the requirements of heat insulation and sun protection, and can also significantly reduce the energy consumption of air conditioners and improve the comfort of drivers and passengers. The total solar transmittance (TTS) of the infrared low transmission region 103 is not more than 55%, more preferably not more than 40%; the total solar transmittance (TTS) can be calculated according to ISO 13837.

The second transparent nano-film 5 is used to reduce the transmittance of the laminated insulating glass in the wavelength range of 780-2500 nm, so as to form the infrared low-transmission area 103 on the laminated insulating glass. The transparent nano-film 5 preferably includes at least one metal silver layer or silver alloy layer, and the metal silver layer or silver alloy layer has good infrared reflection performance, thereby reducing the infrared low transmission area 103 in the wavelength range of 780-2500nm. Transmittance; the material of the silver alloy layer is preferably silver-copper alloy, silver-indium alloy, silver-gold alloy, etc. The silver content in the silver alloy layer is preferably greater than or equal to 95%, more preferably greater than or equal to 98%. Specifically, the infrared low transmittance region 103 formed by the second transparent nano-film 5 comprising two metal silver layers or silver alloy layers has a transmittance of at most 20% in the wavelength range of 780-2500 nm, for example, a transmittance of 16% The infrared low transmittance region 103 formed by the second transparent nano-film 5 comprising three metal silver layers or silver alloy layers has a transmittance of at most 5% in the wavelength range of 780-2500nm, for example, a transmittance of 2% . The metallic silver layer or silver alloy layer can be deposited on the second surface 12 or the third surface 21 by magnetron sputtering. It can be understood that the second transparent nano-film 5 also includes other dielectric layers, such as SnZnOx, SiOx, Si3N4, TiOx, ZnOx, etc. The second transparent nano-film 5 may also include at least one transparent conductive oxide layer (TCO layer), preferably ITO (tin-doped indium oxide), FTO (fluorine-doped tin oxide), ATO (antimony-doped tin oxide), AZO (aluminum-doped zinc oxide), IZO (indium-doped zinc oxide), GZO (gallium-doped zinc oxide), etc.; the transparent conductive oxide layer (TCO layer) can be deposited on the second surface 12, On the third surface 21 or the fourth surface 22, in addition to the transparent conductive oxide layer (TCO layer), the second transparent nano-film 5 may also include other dielectric layers.

In FIG. 1 , the lower edge 41 of the infrared high transmission area 102 is flush with the upper edge 51 of the infrared low transmission area 103 , that is, the lower edge 41 of the infrared high transmission area 102 is flush with the infrared transmission area 103 . The distance L between the upper edges 51 of the low transmission area 103 is 0; as shown in FIG. 3 , between the lower edge 41 of the high infrared transmission area 102 and the upper edge 51 of the low infrared transmission area 103 There is a gap, that is, the distance L between the lower edge 41 of the infrared high transmission area 102 and the upper edge 51 of the infrared low transmission area 103 is greater than 0. In order to maintain the overall consistency of the laminated insulating glass, It is preferably less than or equal to 5mm, more preferably less than or equal to 2mm; as shown in FIG. 4 , there is an overlap between the lower edge 41 of the infrared high transmission area 102 and the upper edge 51 of the infrared low transmission area 103 , that is, The distance L between the lower edge 41 of the infrared high transmission area 102 and the upper edge 51 of the infrared low transmission area 103 is less than 0, in order to make the infrared high transmission area 102 and the infrared low transmission The zones 103 perform their respective functions independently of each other, preferably greater than or equal to -5 mm, more preferably greater than or equal to -2 mm.

As shown in FIG. 5 , the second transparent nano-film 5 is disposed on the third surface 21 , and the second transparent nano-film 5 may include at least one metal silver layer or silver alloy layer or at least one transparent conductive oxide layer (TCO layer); as shown in FIG. 6 , the second transparent nano-film 5 is disposed on the fourth surface 22 , and the second transparent nano-film 5 includes at least one transparent conductive oxide layer (TCO layer). Usually, the thermoplastic intermediate layer 3 is transparent as a whole, so that the heat insulating laminated glass has a visible light transmittance of at least 70%; in order to obtain better driving comfort, the thermoplastic intermediate layer 3 can also be set to correspond to the The part of the first transparent nano-film 4 is colored, so that the visible light transmittance of the infrared high transmittance region 102 is less than or equal to 20%, more preferably less than or equal to 10%. Of course, the portion of the thermoplastic intermediate layer 3 corresponding to the first transparent nano-film 4 may also be gradually colored, so that the visible light transmittance of the high infrared transmission area 102 is from the area closest to the low infrared transmission area. One end of 103 (ie, the lower edge 41 of the high infrared transmittance region 102 ) is gradually 70% or more to the closest to the top edge 100 is less than or equal to 20%, more preferably less than or equal to 10%.

As shown in FIG. 7 , the second transparent nano-film 5 is disposed on the second surface 12 and/or the third surface 21 , and the second transparent nano-film 5 further includes at least one convex toward the upper edge 100 . The extension part 105, the extension part 105 overlaps with the non-signal transmission area of the first transparent nano-film 4, and the non-signal transmission area refers to the signal transmission area except the laser radar signal transmission area and the signal transmission area of the infrared camera. The extension part 105 extends from the low infrared transmission area 103 to the high infrared transmission area 102, so as to improve the signal transmission area and the laser radar signal transmission area in the high infrared transmission area 102. The thermal insulation effect of the area outside the signal transmission area of the infrared camera. More preferably, at least one film removal line (not shown) is arranged in at least one extension part 105 to facilitate the transmission of low frequency microwave signals below 5.8 GHz such as ETC, GPS, etc., and to maintain the appearance consistency.

The above content has specifically described a kind of laminated insulating glass with local high infrared transmission according to the present invention, but the present invention is not limited by the content of the specific embodiments described above, so any Improvements, equivalent modifications and substitutions, etc., all belong to the protection scope of the present invention.

Claims (13)

1. A laminated heat insulating glass with local high infrared transmission, comprising an outer glass sheet, an inner glass sheet and a thermoplastic interlayer sandwiched between the outer glass sheet and the inner glass sheet, the outer glass sheet having a first surface and a second surface, the inner glass sheet having a third surface and a fourth surface, the second surface and the third surface facing each other, the laminated heat insulating glass having a top edge and a bottom edge, at least one of the outer glass sheet and the inner glass sheet having a transmittance of at least 90% in a wavelength range of 850-1550 nm;

arranging a first transparent nano film on the fourth surface, and arranging a second transparent nano film on the second surface, the third surface and/or the fourth surface, wherein the first transparent nano film forms an infrared high-transmittance region on the laminated heat-insulating glass, and the infrared high-transmittance region has a transmittance of at least 92% in a wavelength range of 850-1550 nm;

the second transparent nano film forms an infrared low-transmittance region on the laminated heat-insulating glass, and the infrared low-transmittance region has a transmittance of at most 25% in a wavelength range of 780-2500 nm.

2. The laminated insulating glass according to claim 1, wherein: the infrared high-transmittance region has a transmittance of at least 94% in a wavelength range of 850-1550 nm.

3. The laminated insulating glass according to claim 1, wherein: the outer glass plate and the inner glass plate are both ultra-white float glass.

4. The laminated insulating glass according to claim 1, wherein: the first transparent nano film comprises a laminated structure of at least one high-refractive-index layer/low-refractive-index layer, the refractive index of the high-refractive-index layer is 1.9-2.6, the refractive index of the low-refractive-index layer is 1.3-1.8, and the second transparent nano film comprises at least one metal silver layer, silver alloy layer or transparent conductive oxide layer.

5. The laminated insulating glass according to claim 1, wherein: the attenuation of the infrared high-transmittance region to signals in a wavelength range of 850-1550 nm is not higher than 3dB, and the total solar energy transmittance of the infrared low-transmittance region is not more than 55%.

6. The laminated insulating glass according to claim 1, wherein: the infrared high-transmittance region extends from the top edge to the bottom edge, and the infrared high-transmittance region is provided with a lower edge; the infrared low-transmittance region extends from the bottom edge to the lower edge of the infrared high-transmittance region, and the infrared low-transmittance region is provided with an upper edge; the distance between the lower edge of the infrared high-transmittance area and the upper edge of the infrared low-transmittance area is L, wherein L is more than or equal to-5 mm and less than or equal to 5 mm.

7. The laminated insulating glass according to claim 6, wherein: the distance between the lower edge of the infrared high-transmittance area and the upper edge of the infrared low-transmittance area is L, wherein L is larger than or equal to-2 mm and smaller than or equal to 2 mm.

8. The laminated insulating glass according to claim 1, wherein: the infrared low-transmittance region formed by the second transparent nano film comprising two metal silver layers or silver alloy layers has transmittance of at most 20% in the wavelength range of 780-2500 nm, and the infrared low-transmittance region formed by the second transparent nano film comprising three metal silver layers or silver alloy layers has transmittance of at most 5% in the wavelength range of 780-2500 nm.

9. The laminated insulating glass according to claim 1, wherein: the thermoplastic intermediate layer is colored at the part corresponding to the first transparent nano film, so that the visible light transmittance of the infrared high transmission area is less than or equal to 20 percent.

10. The laminated insulating glass according to claim 1, wherein: the thermoplastic middle layer is colored gradually, so that the visible light transmittance of the infrared high-transmittance area is gradually changed from 70% or more closest to one end of the infrared low-transmittance area to 20% or less closest to the top edge.

11. The laminated insulating glass according to claim 1, wherein: the second transparent nanomembrane is disposed on the second surface and/or a third surface, the second transparent nanomembrane further comprising at least one extension protruding toward the upper edge, the extension overlapping at least a portion of the first transparent nanomembrane.

12. The laminated insulating glass according to claim 11, wherein: at least one film removing line is provided in the at least one extending portion.

13. The laminated insulating glass according to claim 1, wherein: the infrared low-transmission area at least covers the main viewing area of the laminated heat-insulating glass, and the visible light transmission rate of the infrared low-transmission area is greater than or equal to 70%.

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