Laminated glass

Abstract

The present invention provides a windshield in which an information acquisition device for acquiring information from outside of a vehicle by irradiation and / or reception of light can be disposed. The windshield comprises: an outer glass plate; an inner glass plate; an intermediate film disposed between the outer glass plate and the inner glass plate; and a shielding layer which is laminated on at least one of the surface of the outer glass plate on the vehicle inner side and the surface of the inner glass plate on the vehicle inner side. A shaded region that is colored; a transparent non-shadow area; and a transparent sheet member embedded in each of at least one through-hole formed across the shadow region and the non-shadow region.

Description

[0001] This case is a divisional application with an application date of March 12, 2021, application number 202180020739.7 (PCT / JP2021 / 010238), and invention name "Laminated glass". Technical Field

[0002] The present invention relates to a laminated glass capable of being provided with an information acquisition device for acquiring information from outside a vehicle by irradiating and / or receiving light. Background Art

[0003] Laminated glass for vehicles, especially windshields, in which an interlayer film is arranged between a pair of glass plates, sometimes forms a shaded area colored in green, blue, etc. in order to improve anti-glare properties, heat insulation, etc. The shaded area is sometimes provided on the surface of the glass plate, but in most cases it is formed by coloring a part of the interlayer film in a band shape. On the other hand, in order to have a legal field of view area in which the visible light transmittance is above a prescribed value (e.g., above 70%), the shaded area of ​​the windshield is arranged outside the field of view area, that is, usually arranged on the upper part of the windshield.

[0004] However, in recent years, the safety performance of automobiles has been greatly improved. As one of the methods, in order to avoid collision with the vehicle in front, a safety system has been proposed that senses the distance to the vehicle in front and the speed of the vehicle in front and automatically brakes when the vehicle is abnormally close. In such a system, devices such as laser radar or cameras are used to measure the distance to the vehicle in front using laser or infrared rays. In addition, in order to ensure safety and fully utilize the functions of the devices, it is usually desired to install these devices on the upper part of the windshield.

[0005] However, since a shadow region is formed on the upper part of the windshield as described above, when installing a device such as a laser radar, an opening through which camera light can pass needs to be formed in the shadow region. Therefore, for example, Patent Document 1 discloses the following method.

[0006] That is, in Patent Document 1, a through hole is formed in the shaded area, and a transparent sheet member is fitted into the through hole, so that the outside of the vehicle can be photographed by a camera through the sheet member.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: International Publication No. 2003 / 059837 Summary of the invention

[0010] Technical problem to be solved by the invention

[0011] However, since the sheet member and the shadow area are separate parts, it is very difficult to make them have exactly the same thickness. If there is a difference in thickness, a step difference may occur at the boundary between the sheet member and the shadow area. The inventors of the present invention have found that in this case, the glass plate sandwiching the interlayer film does not contact the interlayer film in a manner that compresses the step difference, but the glass plate bends along the sheet member.

[0012] Therefore, the inventors of the present invention have found that there is a possibility of a gap between the glass plate and the interlayer film at the location where the above-mentioned step difference is generated, and thus, there is a possibility of air being trapped in the step difference when manufacturing the laminated glass. Therefore, the air trapped in the step difference looks like bubbles from the inside or outside of the vehicle of the laminated glass, and the aesthetics may be deteriorated. This is not limited to windshields, but is also a technical problem that can occur in other laminated glasses.

[0013] The present invention is completed to solve the above-mentioned technical problems, and its purpose is to provide a laminated glass in which, in the intermediate film, even if the thickness of the sheet part and the shadow area (or the non-shadow area described later) is different, the reduction in aesthetics caused by the occurrence of bubbles, etc. can be suppressed.

[0014] Technical solutions for solving technical problems

[0015] Item 1. A laminated glass capable of being provided with an information acquisition device for acquiring information from outside a vehicle by irradiating and / or receiving light, the laminated glass comprising:

[0016] Outer glass panels;

[0017] Inner glass panel;

[0018] an intermediate film disposed between the outer glass plate and the inner glass plate; and

[0019] a shielding layer laminated on at least one of the surface of the outer glass plate on the vehicle interior side and the surface of the inner glass plate on the vehicle interior side,

[0020] The above-mentioned intermediate film has:

[0021] The shaded areas are colored;

[0022] Transparent non-shaded areas; and

[0023] a transparent sheet member in which at least one through hole formed across the shadow area and the non-shadow area is respectively embedded,

[0024] The shielding layer has at least one opening formed at a position corresponding to the sheet member and located further inward than an edge of the sheet member.

[0025] The light of the information acquisition device passes through the opening.

[0026] The thickness of the laminated glass at the center point of the sheet member is defined as H1, and the thickness of the laminated glass at a distance of 400 mm from the edge of the sheet member on a virtual line passing through the center point and extending in the horizontal direction is defined as H2.

[0027] Further, when an arbitrary point A of the inner edge of the opening, a point B at the outer edge of the sheet member at the shortest distance from the point A, and a point C at which a virtual line extending from the point A through the point B intersects the outer edge of the shielding layer are defined,

[0028] The distance between the above point A and the above point B is defined as S1, and the distance between the above point B and the above point C is defined as S2.

[0029] When H1 is greater than H2, the structure is such that at the point where S1+S2 is the smallest, S1 is less than S2.

[0030] When H1 is smaller than H2, S1 is larger than S2 at the position where S1+S2 is minimum.

[0031] Item 2. The laminated glass according to Item 1, wherein when H1 is greater than H2, the distance S2 is 5 to 50 mm.

[0032] Item 3. The laminated glass according to Item 1, wherein when H1 is smaller than H2, the distance S1 is 5 to 50 mm.

[0033] Item 4. The laminated glass according to Item 2 or 3, wherein S1+S2 is 100 mm or less.

[0034] Item 5. The laminated glass according to any one of Items 1 to 4, wherein a plurality of the openings are formed.

[0035] When the shortest distance between the adjacent openings is shorter than the sum of S2 associated with the respective openings, the sheet members corresponding to the respective openings are formed integrally.

[0036] Item 6. The laminated glass according to any one of Items 1 to 5, wherein the shielding material forming the shielding layer and the glass sheet have different thermal expansion coefficients.

[0037] The glass plate and the shielding layer are formed by heating together.

[0038] An opening peripheral region in which the shielding material is arranged at a small ratio per unit area is formed in at least a portion of the inner peripheral region of the opening along the shielding layer.

[0039] The light is configured to pass through a region further inside the opening peripheral region.

[0040] Item 7. The laminated glass according to Item 6, wherein the opening peripheral region is formed over the entire circumference of the inner peripheral edge of the opening.

[0041] Item 8. The laminated glass according to Item 6 or 7, wherein the interior of the opening peripheral region of the laminated glass is composed of a deformation region along the inner peripheral edge of the opening peripheral region and a central region adjacent to the inner side of the deformation region,

[0042] The light is configured to pass through the entirety or a portion of the central region.

[0043] Item 9. The laminated glass according to Item 8, wherein a width of the deformation region is 6 mm or less.

[0044] Item 10. The laminated glass according to any one of Items 6 to 9, wherein the opening peripheral region has a plurality of shielding pieces formed of the shielding material.

[0045] The plurality of shielding sheets are arranged at intervals from each other.

[0046] Item 11. The laminated glass according to Item 10, wherein each of the shielding sheets is formed in a circular shape.

[0047] Item 12. The laminated glass according to Item 10 or 11, wherein the shielding sheets are arranged in a staggered pattern.

[0048] Item 13. The laminated glass according to any one of Items 6 to 12, wherein at least a portion of the shielding layer is black.

[0049] Item 14. The laminated glass according to any one of Items 6 to 13, wherein an electromagnetic wave shielding film is formed in at least a portion of a region where the information acquisition device is installed in the shielding layer, the opening peripheral region, and the deformation region.

[0050] Item 15. The laminated glass as described in Item 14, wherein at least a portion of the shielding layer, the opening peripheral area and the deformation area are formed by arranging the first field of view shielding film, the electromagnetic wave shielding film and the second field of view shielding film in sequence from the outside of the vehicle to the inside of the vehicle.

[0051] Item 16. The laminated glass according to any one of Items 1 to 15, wherein the sheet member is larger than a square with a side of 100 mm and smaller than a square with a side of 300 mm.

[0052] Item 17. The laminated glass according to any one of Items 1 to 16, wherein the intermediate film is composed of a plurality of layers.

[0053] Item 18. The laminated glass according to Item 17, wherein the intermediate film comprises at least a core layer and a pair of outer layers sandwiching the core layer.

[0054] The Young's modulus of the core layer is 20 MPa or less at 20° C. and 100 Hz.

[0055] Item 19. The laminated glass according to any one of Items 1 to 18, wherein 2 to 4 through holes are formed, and the sheet member is fitted into each of the through holes.

[0056] Item 20. The laminated glass according to any one of Items 1 to 19, wherein the cross section in the vertical direction is formed in a wedge shape.

[0057] Item 21. The laminated glass according to any one of Items 1 to 20, wherein a thickness of the outer glass sheet is smaller than a thickness of the inner glass sheet.

[0058] Item 22. The laminated glass according to Items 1 to 21, which is used as a windshield.

[0059] Item 23. The laminated glass according to Items 1 to 22, which is used as a rear window glass.

[0060] Effects of the Invention

[0061] According to the present invention, even if the sheet member and the shaded area (or non-shaded area described below) have different thicknesses in the interlayer film, it is possible to suppress a decrease in the appearance due to the occurrence of bubbles or the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a plan view showing one embodiment of the laminated glass according to the present invention.

[0063] Figure 2 yes Figure 1 Cross-sectional view of .

[0064] Figure 3 It is a top view of the intermediate film.

[0065] Figure 4 This is a block diagram showing a schematic configuration of an in-vehicle system.

[0066] Figure 5 yes Figure 6 X-ray cross-section of.

[0067] Figure 6 It is a partial top view of laminated glass.

[0068] Figure 7 yes Figure 8 Y-Y line cross-sectional view.

[0069] Figure 8It is a partial top view of laminated glass.

[0070] Fig. 9 It is a partial top view of laminated glass.

[0071] Fig.10 It is a plan view showing another example of the opening of the shielding layer.

[0072] Fig.11 It is a plan view showing another example of the opening of the shielding layer.

[0073] Fig.12 It is a plan view showing another example of the opening of the shielding layer.

[0074] Fig.13 It is a plan view showing another example of the opening of the shielding layer.

[0075] Explanation of symbols

[0076] 10: Laminated glass; 11: Outer glass plate; 12: Inner glass plate; 2: Photographic device (information acquisition device); 4: Shielding layer; 43: Opening (information acquisition area); 5: Intermediate film; 51: Shadow area; 52: Non-shadow area; 8: Sheet member. DETAILED DESCRIPTION

[0077] Hereinafter, an embodiment of applying the laminated glass according to the present invention to a windshield will be described. Figure 1 and Figure 2 , the structure of the windshield involved in this embodiment is described. Figure 1 This is a top view of the windshield. Figure 2 yes Figure 1 For the convenience of explanation, Figure 1 The up and down directions are called "up and down", "vertical", and "longitudinal". Figure 1 The left and right direction is called “left and right”. Figure 1 The windshield is shown as seen from the inside of the car. Figure 1 The rear side of the paper is the outside of the car. Figure 1 The front side of the paper is the inner side of the vehicle.

[0078] The windshield has a trapezoidal laminated glass 10, which is arranged in a tilted state in the vehicle body. The laminated glass 10 has an outer glass plate 11, an inner glass plate 12, and an intermediate film 5 arranged therebetween. In addition, a shielding layer 4 is laminated on the inner surface of the outer glass plate 11 and the inner surface of the inner glass plate 12, and the shielding layer 4 is used to block the field of view from outside the vehicle. In addition, an opening 43 is formed on the shielding layer 4, and the conditions outside the vehicle can be photographed through the opening 43 using a camera 2 arranged in the vehicle. That is, the opening 43 constitutes a photographing window. In addition, a frame-shaped bracket 6 is fixed to the shielding layer 4 of the inner glass plate 12, and the camera 2 is mounted on the bracket 6. The bracket 6 is formed on the frame and fixed on the shielding layer 4, so the bracket 6 cannot be seen from outside the vehicle. Below, each component is described in detail.

[0079] <1. Laminated glass>

[0080] Figure 2 2 is a cross-sectional view of a laminated glass. As shown in the figure, the laminated glass 10 includes an outer glass plate 11 and an inner glass plate 12, and a resin intermediate film 5 is disposed between the glass plates 11 and 12. The following describes their configuration.

[0081] <1-1. Glass plate>

[0082] First, the outer glass plate 11 and the inner glass plate 12 are described. The outer glass plate 11 and the inner glass plate 12 may be known glass plates, or may be formed of heat-absorbing glass, general transparent glass, green glass, or UV green glass. However, these glass plates 11 and 12 need to achieve visible light transmittance that meets the safety standards of the country where the automobile is used. For example, the outer glass plate 11 can be adjusted to ensure the necessary sunlight absorption rate, and the inner glass plate 12 can be adjusted to meet the safety standards. An example of transparent glass, heat-absorbing glass, and soda-lime glass is shown below.

[0083] (clear glass)

[0084] SiO2: 70-73 mass%;

[0085] Al2O3: 0.6-2.4 mass%;

[0086] CaO: 7-12 mass%;

[0087] MgO: 1.0-4.5 mass%;

[0088] R2O: 13-15 mass% (R is an alkali metal);

[0089] Total iron oxide converted to Fe2O3 (T-Fe2O3): 0.08-0.14 mass %.

[0090] (Heat-absorbing glass)

[0091] The composition of the heat-absorbing glass can, for example, be as follows: based on the composition of transparent glass, the ratio of total iron oxide (T-Fe2O3) converted to Fe2O3 is 0.4 to 1.3 mass %, the ratio of CeO2 is 0 to 2 mass %, the ratio of TiO2 is 0 to 0.5 mass %, and the skeleton component of the glass (mainly SiO2 or Al2O3) is reduced only by the increase in T-Fe2O3, CeO2 and TiO2.

[0092] (Soda-lime glass)

[0093] SiO2: 65-80 mass%;

[0094] Al2O3: 0-5 mass%;

[0095] CaO: 5-15 mass%;

[0096] MgO: 2 mass % or more;

[0097] NaO: 10-18 mass%;

[0098] K2O: 0-5 mass%;

[0099] MgO+CaO: 5-15 mass%;

[0100] Na2O+K2O: 10-20 mass%;

[0101] SO3: 0.05-0.3 mass%;

[0102] B2O3: 0-5 mass%;

[0103] Total iron oxide converted to Fe2O3 (T-Fe2O3): 0.02 to 0.03 mass %.

[0104] The thickness of the laminated glass 10 involved in this embodiment is not particularly limited. As an example, the total thickness of the outer glass plate 11 and the inner glass plate 12 can be 2.1 to 6 mm. From the perspective of weight reduction, the total thickness of the outer glass plate 11 and the inner glass plate 12 is preferably 2.4 to 3.8 mm, more preferably 2.6 to 3.4 mm, and particularly preferably 2.7 to 3.2 mm. In this way, in order to reduce the weight, it is necessary to reduce the total thickness of the outer glass plate 11 and the inner glass plate 12. Therefore, the thickness of each glass plate is not particularly limited. For example, the thickness of the outer glass plate 11 and the inner glass plate 12 can be determined as follows.

[0105] The outer glass plate 11 mainly needs to be durable and impact-resistant to damage from the outside. As a windshield of an automobile, it needs to be impact-resistant to flying objects such as pebbles. On the other hand, the greater the thickness, the greater the weight, which is not preferred. From this point of view, the thickness of the outer glass plate 11 is preferably 1.8 to 2.3 mm, and more preferably 1.9 to 2.1 mm. Which thickness to use can be determined according to the use of the glass.

[0106] The thickness of the inner glass plate 12 may be equal to that of the outer glass plate 11. For example, in order to reduce the weight of the laminated glass 10, the thickness may be smaller than that of the outer glass plate 11. Specifically, if the strength of the glass is taken into consideration, the thickness is preferably 0.6 to 2.0 mm, preferably 0.8 to 1.6 mm, and particularly preferably 1.0 to 1.4 mm. More preferably, it is 0.8 to 1.3 mm. The thickness of the inner glass plate 12 may be determined according to the application of the glass.

[0107] Here, an example of a method for measuring the thickness of a glass plate (laminated glass) 1 when it is bent is described. First, regarding the measurement position, it is two locations above and below on a center line S extending in the vertical direction from the center of the glass plate in the left-right direction. The measuring device is not particularly limited, and for example, a thickness gauge such as SM-112 manufactured by Teclock Co., Ltd. can be used. When measuring, the curved surface of the glass plate is placed on a flat surface, and the end of the glass plate is clamped by the thickness gauge for measurement. In addition, when the glass plate is flat, the measurement can be performed in the same way as when it is bent.

[0108] <1-2. Interlayer>

[0109] Figure 3 is a top view of the intermediate film. Figure 3 As shown, the intermediate film 5 is formed to be the same size as each glass plate 11, 12, and has a strip-shaped shadow area 51 constituting the upper end of the intermediate film 5, a non-shadow area 52 connected to the lower end of the shadow area 51 and occupying most of the intermediate film 5, and a sheet member 8 arranged between the shadow area 51 and the non-shadow area 52.

[0110] The shadow area 51 is an area with high transmittance loss for visible light, and can be colored in black, green, blue, etc. The shadow area 51 realizes various functions associated with light reduction (anti-glare, heat insulation, etc.). On the other hand, the non-shadow area 52 is not colored and is a transparent area.

[0111] Regarding the intermediate film 5, both the shadow region 51 and the non-shadow region 52 are formed by at least one layer. As an example of the non-shadow region 52, Figure 2As shown in the enlarged view of , it can be composed of three layers in which a soft core layer 521 is sandwiched by an outer layer 522 that is harder than the core layer 521. However, it is not limited to this structure, as long as it is formed by a plurality of layers including a core layer 521 and at least one outer layer 522 arranged on the outer glass plate 11 side. For example, it is also possible to form: an intermediate film 5 including a core layer 521 and a two-layer outer layer 522 arranged on the outer glass plate 11 side; or an intermediate film 5 in which two or more even-numbered outer layers 522 are arranged on both sides of the core layer 521; or an intermediate film 5 in which a core layer 521 is sandwiched, an outer layer 522 of an odd number of layers is arranged on one side, and an outer layer 522 of an even number of layers is arranged on the other side. In addition, when only one outer layer 522 is provided, it is provided on the outer glass plate 11 side as described above, in order to improve the damage resistance performance against external forces from outside the vehicle or the outside of the house. In addition, when the number of layers of the outer layer 522 is large, the sound insulation performance also becomes higher.

[0112] The hardness of the core layer 521 is not particularly limited as long as it is softer than the outer layer 522. The materials constituting each layer 521, 522 are not particularly limited, for example, the material can be selected based on the Young's modulus. Specifically, the Young's modulus of the core layer 521 is preferably 1 to 20 MPa at a frequency of 100 Hz and a temperature of 20°C, more preferably 1 to 18 MPa, and particularly preferably 1 to 14 MPa. Within such a range, in the low frequency domain of about 3500 Hz or less, the sound transmission loss (STL) can be prevented from decreasing. On the other hand, the Young's modulus of the outer layer 522 is preferably larger as described later in order to improve the sound insulation performance in the high frequency domain, and can be 560 MPa or more, 600 MPa or more, 650 MPa or more, 700 MPa or more, 750 MPa or more, 880 MPa or more, or 1300 MPa or more at a frequency of 100 Hz and a temperature of 20 degrees. The upper limit of the Young's modulus of the outer layer 522 is not particularly limited, and can be set, for example, from the viewpoint of processability. For example, when it is 1750 MPa or more, it is empirically known that processability, particularly cutting, becomes difficult.

[0113] In addition, as a specific material, the outer layer 522 can be composed of, for example, polyvinyl butyral resin (PVB). Polyvinyl butyral resin is excellent in adhesion and penetration resistance to each glass plate, and is therefore preferred. On the other hand, the core layer 521 can be composed of, for example, ethylene vinyl acetate resin (EVA), or polyvinyl acetal resin that is softer than the polyvinyl butyral resin constituting the outer layer. By sandwiching a soft core layer in the middle, it is possible to maintain the same adhesion and penetration resistance as a single-layer resin interlayer, greatly improving the sound insulation performance.

[0114] In general, the hardness of the polyvinyl acetal resin can be controlled by (a) the degree of polymerization of the polyvinyl alcohol as the starting material, (b) the degree of acetalization, (c) the type of plasticizer, (d) the addition ratio of the plasticizer, etc. Therefore, by appropriately adjusting at least one of the conditions selected from these, even if the same polyvinyl butyral resin is used, a hard polyvinyl butyral resin for the outer layer 522 and a soft polyvinyl butyral resin for the core layer 521 can be prepared separately. In addition, the hardness of the polyvinyl acetal resin can also be controlled by the type of aldehyde used for acetalization, co-acetalization using multiple aldehydes, or pure acetalization using a single aldehyde. Although it cannot be generalized, the polyvinyl acetal resin obtained using an aldehyde with a larger number of carbon atoms tends to be softer. Therefore, for example, when the outer layer 522 is composed of a polyvinyl butyral resin, the core layer 521 may use a polyvinyl acetal resin obtained by acetalizing an aldehyde having 5 or more carbon atoms (e.g., hexanal, 2-ethylbutyraldehyde, heptaldehyde, and octanal) using polyvinyl alcohol. However, the resin is not limited to the above resins as long as a predetermined Young's modulus can be obtained.

[0115] The shadow region 51 is also composed of the same layers as the non-shadow region 52, and can be composed of, for example, a core layer and a pair of outer layers sandwiching the core layer and the outer layer. As described above, the shadow region 51 is colored, and for example, one or more of the core layer and the outer layer can be colored using a colorant such as a pigment or a dye. As the pigment, for example, organic pigments such as azo, phthalocyanine, and quinacridone, and inorganic pigments such as metal oxides and metal powders can be used.

[0116] When a pigment is used, a colored core layer and a non-colored transparent outer layer are respectively produced by extrusion molding using a resin composition obtained by kneading a pigment with a resin and a plasticizer and a resin composition (resin and plasticizer) not containing a pigment, and the core layer is sandwiched and molded by the outer layers, thereby obtaining a colored shadow region 51. On the other hand, when a dye is used, a mask is used to expose a region in the intermediate film 5 where the shadow region 51 is to be formed, and the dye is applied to the region. The dye can be applied, for example, by spraying or printing.

[0117] Next, the sheet member 8 will be described. Figure 3As shown in the figure, a rectangular through hole 50 is formed in the middle of the interlayer film 5 in the left-right direction so as to straddle the boundary between the shaded area 51 and the non-shaded area, and the above-mentioned sheet member 8 is arranged in the through hole 50. That is, the above-mentioned rectangular through hole 50 can be formed by combining a rectangular recessed portion formed at the lower end of the shaded area 51 and a rectangular recessed portion formed near the center of the upper end of the non-shaded area 52. The sheet member 8 is formed of a transparent material, and may be composed of a single layer, or may be composed of multiple layers like the shaded area 51 or the non-shaded area 52. In addition, when composed of a single layer, it may be formed of any material of the core layer or the outer layer described above.

[0118] The sheet member 8 is arranged at a position corresponding to an extension portion 42 of the shielding layer 4 described later, and an opening 43 formed in the extension portion 42 is located inside the sheet member 8. Therefore, the sheet member 8 is arranged inside the opening 43.

[0119] In addition, the total thickness of the intermediate film 5 is not particularly specified, but is preferably 0.3 to 6.0 mm, more preferably 0.5 to 4.0 mm, and particularly preferably 0.6 to 2.0 mm. In addition, the thickness of the core layer 521 is preferably 0.1 to 2.0 mm, and more preferably 0.1 to 0.6 mm. On the other hand, the thickness of each outer layer 522 is preferably 0.1 to 2.0 mm, and more preferably 0.1 to 1.0 mm. In addition, the total thickness of the intermediate film 5 can be made constant, and the thickness of the core layer 521 can be adjusted therein.

[0120] The thickness of the core layer 521 and the outer layer 522 can be measured, for example, as described below. First, use a microscope (such as VH-5500 manufactured by Keyence) to magnify the cross section of the laminated glass to 175 times and then display it. Then, the thickness of the core layer 521 and the outer layer 522 is determined by visual inspection and measured. At this time, in order to eliminate the deviation of visual inspection, the number of measurements is set to 5 times, and the average value is used as the thickness of the core layer 521 and the outer layer 522. For example, take an enlarged photograph of the cross section of the laminated glass, determine the core layer 521 and the outer layer 522, and then measure the thickness.

[0121] In addition, the thickness of the core layer 521 and the outer layer 522 of the intermediate film 5 does not need to be constant over the entire surface, and may be wedge-shaped, for example, when used for laminated glass used in a head-up display. In this case, the thickness of the core layer 521 and the outer layer 522 of the intermediate film 5 is measured at the lowest thickness portion, that is, the bottom edge of the laminated glass. When the intermediate film 5 is wedge-shaped, the outer glass plate 11 and the inner glass plate 12 are not arranged in parallel, but such an arrangement is also included in the glass plate of the present invention. That is, the present invention includes, for example, an arrangement of the outer glass plate and the inner glass plate when using the intermediate film 5, which uses the core layer 521 or the outer layer 522 whose thickness increases at a rate of change of 3 mm or less per 1 m.

[0122] The manufacturing method of the intermediate film 5 is not particularly limited, and examples thereof include: a method of uniformly kneading the above-mentioned resin components such as polyvinyl acetal resin, a plasticizer, and other additives as needed, and then extruding each layer into a single piece; a method of laminating two or more resin films made by this method by pressing, laminating, etc. The resin film before lamination used in the lamination method by pressing, laminating, etc. may be a single-layer structure or a multi-layer structure. In addition, the intermediate film 5 may be formed by a single layer in addition to being formed by multiple layers as described above. Furthermore, the sheet member 8 may be embedded after the through hole 50 as described above is formed.

[0123] <2. Overview of shielding layer>

[0124] Next, the shielding layer 4 will be described. Figure 1 and Figure 2 As shown, a shielding layer 4 is formed on both the inner surface of the inner glass plate 12 and the inner surface of the outer glass plate 11. Since the shielding layers 4 formed on the inner glass plate 12 and the outer glass plate 11 have the same shape and are laminated at the same position, the shielding layer 4 laminated on the inner glass plate 12 will be described below.

[0125] The shielding layer 4 includes a peripheral portion 41 laminated over the entire periphery of the inner glass plate 12 and a rectangular extension portion 42 connected to the peripheral portion 41 and extending downward from the center of the upper side of the inner glass plate 12. A trapezoidal opening 43 is formed at the lower end of the extension portion 42, and the camera 2 installed on the inside of the vehicle can capture the outside of the vehicle through the opening 43 and the laminated glass 10. In addition, the boundary 53 between the shadow area 51 and the non-shadow area 52 of the intermediate film 5 extends in the horizontal direction so as to pass through the opening 43.

[0126] like Figure 2As shown, the bracket 6 is fixed to the shielding layer 4. Specifically, the bracket 6 is formed into a frame shape surrounding the opening, and is fixed to the shielding layer 4 by double-sided tape, adhesive, etc. And, the camera 2 is supported by the bracket 6, and the camera outside the vehicle is photographed through the opening 43. In addition, although not shown in the figure, a cover is installed on the bracket 6 so that the camera 2 cannot be seen from the inside of the vehicle.

[0127] Next, the material of the shielding layer 4 will be described. The material of the shielding layer 4 can be appropriately selected according to the embodiment as long as it can block the view from outside the vehicle, and for example, dark ceramics such as black, brown, gray, and dark blue can be selected.

[0128] When black ceramic is selected as the material of the shielding layer 4, for example, black ceramic is laminated on the inner surface of the inner glass plate 12 by screen printing, and the laminated ceramic is heated together with the glass plates 11 and 12. Then, when the ceramic is hardened, the shielding layer 4 is completed. The ceramic used in each shielding layer 4 can use various materials. For example, the shielding layer 4 can use ceramics with the composition shown in the following Table 1.

[0129] [Table 1]

[0130] First and second coloring ceramic pastes Pigment*1 quality% 10 Resin (cellulose resin) quality% 10 Organic solvent (pine oil) quality% 10 Glass adhesive*2 quality% 70 Viscosity dPs 150

[0131] *1, Main ingredients: copper oxide, chromium oxide, iron oxide and manganese oxide;

[0132] *2, Main ingredients: bismuth borosilicate, zinc borosilicate.

[0133] <3.In-vehicle system>

[0134] Next, use Figure 2 and Figure 4 , an in-vehicle system including a photographing device 2 and an image processing device 3 is described. Figure 4 The following is an example of the configuration of the vehicle-mounted system. Figure 4 As illustrated, the vehicle-mounted system according to the present embodiment includes the above-mentioned imaging device 2 and an image processing device 3 connected to the imaging device 2 .

[0135] The image processing device 3 is a device that processes the captured image obtained by the imaging device 2. For example, as a hardware configuration, the image processing device 3 has conventional hardware such as a storage unit 31, a control unit 32, and an input / output unit 33 connected via a bus. However, the hardware configuration of the image processing device 3 is not limited to such an example, and the specific hardware configuration of the image processing device 3 may be appropriately supplemented, omitted, or added according to the embodiment.

[0136] The storage unit 31 stores various data and programs (not shown) used in the processing executed by the control unit 32. The storage unit 31 can be implemented, for example, by a hard disk, or by a recording medium such as a USB memory. In addition, the various data and programs stored in the storage unit 31 can also be obtained from a recording medium such as a CD (Compact Disc) or a DVD (Digital Versatile Disc). In addition, the storage unit 31 can also be called an auxiliary storage device.

[0137] As described above, the laminated glass 10 is arranged in an inclined posture relative to the vertical direction and is curved. Furthermore, the camera 2 captures the conditions outside the vehicle through such laminated glass 10. Therefore, the captured image obtained by the camera 2 is deformed according to the posture, shape, refractive index, optical defects, etc. of the laminated glass 10. In addition, the camera lens of the camera 2 also applies inherent aberration. Therefore, the storage unit 31 may also store correction data for correcting the image deformed by the aberration between such laminated glass 10 and the camera lens.

[0138] The control unit 32 has one or more processors such as a microprocessor or a CPU (Central Processing Unit) and peripheral circuits (ROM (Read Only Memory), RAM (Random Access Memory), interface circuits, etc.) used in the processing of the processor. In the sense of the address space processed by the processor configured in the control unit 32, ROM, RAM, etc. can also be called a main storage device. The control unit 32 functions as an image processing unit 321 by executing various data and programs stored in the storage unit 31.

[0139] The image processing unit 321 processes the captured image obtained by the camera 2. The processing of the captured image can be appropriately selected according to the implementation method. For example, the image processing unit 321 analyzes the captured image through pattern matching, etc., so that the subject captured by the captured image can be identified. In this embodiment, the camera 2 captures the situation in front of the vehicle, so the image processing unit 321 can further determine whether a person or other living thing is captured in front of the vehicle based on the subject recognition. Moreover, when a person is captured in front of the vehicle, the image processing unit 321 can output a warning message according to a prescribed method. For example, the image processing unit 321 can also perform prescribed processing on the captured image. Moreover, the image processing unit 321 can also output the processed captured image to a display device (not shown) such as a display connected to the image processing device 3.

[0140] The input / output unit 33 is one or more interfaces for transmitting and receiving data with a device existing outside the image processing device 3. The input / output unit 33 is, for example, an interface for connecting to a user interface, or an interface such as a USB (Universal Serial Bus). In this embodiment, the image processing device 3 is connected to the imaging device 2 via the input / output unit 33 to obtain the captured image captured by the imaging device 2.

[0141] Such an image processing device 3 may be a device designed specifically for the provided service, or a general-purpose device such as a PC (Personal Computer) or a tablet terminal may be used.

[0142] In addition, the camera device 2 is mounted on the bracket 6 as described above. Therefore, in this state, the mounting of the camera device 2 to the bracket 6 and the mounting of the bracket to the shielding layer 4 are adjusted so that the optical axis of the camera lens of the camera device 2 passes through the opening 43. In addition, a cover (not shown) is mounted on the bracket 6 in such a manner as to cover the camera device 2. Therefore, the camera device 2 is arranged in a space surrounded by the laminated glass 10, the bracket 6 and the cover, and cannot be seen from the inside of the vehicle, and even from the outside of the vehicle, only a part of the camera device 2 can be seen through the opening 43 due to the shielding layer 4. Moreover, the camera device 2 and the above-mentioned input and output unit 33 are connected by a cable (not shown), which is led out from the cover and connected to the image processing device 3 arranged at a specified position in the vehicle.

[0143] <4. Method for manufacturing windshield>

[0144] Next, a method for manufacturing a windshield is described. First, a shielding layer 4 is laminated on an outer glass plate 11 and an inner glass plate 12 formed into a predetermined shape. Next, these glass plates 11 and 12 are formed in a curved manner. This method is not particularly limited, and for example, it can be performed by a known press molding. Alternatively, after the outer glass plate 11 and the inner glass plate 12 are overlapped and arranged on a molding die, the molding die is heated by a heating furnace. In this way, these glass plates 11 and 12 can be bent due to their own weight.

[0145] When the outer glass plate 11 and the inner glass plate 12 are formed in this manner, a laminated body is formed in which the intermediate film 5 is sandwiched between the outer glass plate 11 and the inner glass plate 12. The intermediate film 5 is formed in a shape larger than the glass plates 11 and 12.

[0146] Next, the laminate is placed in a rubber bag and pre-bonded at about 70 to 110°C while reducing the pressure and sucking. The pre-bonding method can also be a method other than the above, and the following method can also be used. For example, the laminate is heated at 45 to 65°C in an oven. Next, the laminate is pressed at 0.45 to 0.55 MPa with a roller. Next, the laminate is heated again at 80 to 105°C in an oven, and then pressed again at 0.45 to 0.55 MPa with a roller. In this way, the pre-bonding is completed.

[0147] Next, main bonding is performed. For the pre-bonded laminate, main bonding is performed using an autoclave, for example, at 8 to 15 atmospheres and 100 to 150° C. Specifically, for example, main bonding can be performed at 14 atmospheres and 135° C. Through the above pre-bonding and main bonding, the intermediate film 5 can be bonded to each glass plate 11, 12. Next, the intermediate film 5 exposed from the outer glass plate 11 and the inner glass plate 12 is cut.

[0148] <5. Effect of Sheet Components on Laminated Glass Thickness>

[0149] The thickness of the sheet member 8 is substantially the same as that of the shadow region 51 and the non-shadow region 52. However, the inventors of the present invention have found that, for example, when the thickness of the sheet member 8 is different from that of the shadow region 51 and the non-shadow region 52, the thickness of the laminated glass 10 is affected. Figures 5 to 9 Provide explanation. Figure 5 yes Figure 6 X-ray cross-section diagram of Figure 6 This is a partial top view of laminated glass. Figure 7 yes Figure 8 The Y-Y line cross-section diagram, Figure 8 This is a partial top view of laminated glass. Fig. 9 It is a partial top view of laminated glass.

[0150] For example Figure 5 As shown, when the thickness of the sheet member 8 is greater than the thickness of the shaded area 51 and the non-shaded area 52, that is, when a step difference is generated due to the difference in thickness, the sheet member 8 forms a protrusion on the surface of the intermediate film 5, but the outer glass plate 11 does not contact the intermediate film 5 by compressing the protrusion, but the outer glass plate 11 bends along the protrusion, so that the thickness is greater than other parts. Figure 5 The example in which the sheet member 8 protrudes toward the outer glass plate 11 is illustrated, but it is also conceivable that the sheet member 8 protrudes toward the inner glass plate 12 side, or protrudes toward both glass plates 11 and 12 sides.

[0151] In this case, a step is generated at the boundary between the sheet member 8 and the shadow region 51, so when manufacturing the laminated glass 10, there is a possibility that a gap R in which air is trapped is formed between the outer glass plate 11 and the intermediate film 5. In this way, when air enters the step, the aesthetics deteriorates, so in this embodiment, it is stipulated as follows.

[0152] First, the inventors of the present invention found that Fig. 9 As shown in FIG. 1 , when the thickness of the windshield at the center point M of the sheet member 8 is defined as H1, and the thickness of the windshield at a point N 400 mm away from the edge of the sheet member 8 on a virtual line L passing through the center point M and extending in the horizontal direction is defined as H2, when H1 is greater than H2 (Formula (1)), Figure 5 As shown, there is a possibility that the sheet member forms a protrusion on the surface of the intermediate film 5 .

[0153] H1>H2 (1)

[0154] That is, since the difference in thickness between the sheet member 8 and the shadow region 51 (or non-shadow region 52) cannot be directly measured from the windshield after manufacture, the inventors of the present invention have found that by measuring H1 and H2 as described above, there is a difference in thickness between the sheet member 8 and the shadow region 51, and thus there is a possibility of the above-mentioned protrusion being generated. This is also the same as the case where a recess is formed by the sheet member 8, as described later.

[0155] In this case, if Figure 5 and Figure 6 As shown, an arbitrary point A defining the inner edge of the opening 43 and a point B at which the distance from the outer edge of the sheet member 8 to the point A is the shortest, and a point C at which a virtual line K extending from the point A through the point B intersects the outer edge of the extension 42 of the shielding layer 4. In addition, when the distance between the point A and the point B is defined as S1 and the distance between the point B and the point C is defined as S2, the following formula (2) is satisfied at the position where S1+S2 is the smallest. The position where S1+S2 is the smallest varies depending on the shape of the shielding layer 4 and the shape of the sheet member 8. In the present embodiment, it is the position between the corner (point A) at the lower end of the opening 43 and the edge (point C) of the extension 42 of the shielding layer 4.

[0156] S1<S2 (2)

[0157] As a result, in the extension portion 42, the area outside the outer edge of the sheet member 8 (the area between point B and point C) becomes larger, so that the gap R is easily hidden behind the shielding layer 4, thereby preventing the gap R from being seen from outside and inside the vehicle. When the formula (2) is satisfied, for example, it is sufficient to adjust the size of the sheet member 8 or the width of the extension portion 42 (the length from the inner edge of the opening 43 to the outer edge of the extension portion 42).

[0158] In addition, as a result of the research of the inventor of the present invention, the bubbles retained in the above-mentioned gap R also vary depending on the conditions, so bubbles of various widths (in the direction perpendicular to the outer edge of the sheet member 8) have been confirmed. In order to hide them, S2 is preferably 5 mm or more, more preferably 10 mm or more, and more preferably 20 mm or more. However, when S2 is too large, the shielding layer 4 becomes larger and the field of view of the windshield becomes narrower. Therefore, S2 is preferably 50 mm or less, and more preferably 40 mm or less. In addition, from this point of view, S1+S2 is preferably 10 to 100 mm.

[0159] The inventors of the present invention have found that the gap R is likely to be generated particularly when the following formula (3) is satisfied. Therefore, when the following formula (3) is satisfied, particularly when the formula (2) is satisfied, it is possible to suppress the gap R from being seen from outside the vehicle.

[0160] H1-H2>300μm (3)

[0161] Here, the inventors of the present invention conducted research using laminated glass having an outer glass plate with a thickness of 2.0 mm, an inner glass plate with a thickness of 1.3 mm, and an intermediate film with a thickness of 0.76 mm (thickness excluding the sheet member 8 ). The results are as follows.

[0162] [Table 2]

[0163] H1-H2(μm) Horizontal width of gap R (mm) Whether there are bubbles 350 10 Many bubbles 120 1 Few bubbles 50 0 Unable to confirm bubbles 0 0 Unable to confirm bubbles －50 0 Unable to confirm bubbles －120 1 Few bubbles －350 10 Many bubbles

[0164] In Table 2, when H1-H2 is negative, as described below Figure 7 As shown, it can be expected that the thickness of the sheet member 8 is thinner than the shaded area 51 (or the non-shaded area 52). In addition, when H1-H2 is 0, it can be expected that there is no step difference between the sheet member 8 and the shaded area 51 (or the non-shaded area 52). Therefore, bubbles cannot be confirmed. Similarly, when H1-H2 is 50μm and -50μm, bubbles cannot be confirmed. That is, it can be expected that the larger the absolute value of H1-H2, the larger the step difference, and thus the larger the width of the gap R. Moreover, when the width of the gap R is large, more bubbles are seen. In particular, when the above formula (3) is satisfied, it is confirmed that the bubbles have become larger.

[0165] In the above, the case where the protrusions are formed in the intermediate film 5 by the sheet member 8 has been described. Next, the case where the recesses are formed in the intermediate film 5 by the sheet member 8 will be described.

[0166] For example Figure 7As shown, when the thickness of the sheet member 8 is smaller than the thickness of the shaded area 51 and the non-shaded area 52, the sheet member 8 forms a recessed portion on the surface of the intermediate film 5, but the outer glass plate 11 does not contact the intermediate film 5 in a manner that absorbs the recessed portion, but the outer glass plate 11 bends along the recessed portion, so that the thickness is smaller than other portions. Figure 7 The example in which the sheet member 8 is recessed on the outer glass plate 11 side is illustrated, but it is also conceivable that the sheet member 8 is recessed on the inner glass plate 12 side, or on both glass plates 11 and 12 sides.

[0167] In this case, a step is generated at the boundary between the sheet member 8 and the shadow region 51, so when manufacturing the laminated glass 10, there is a possibility that a gap R in which air is trapped is formed between the outer glass plate 11 and the intermediate film 5. In this way, when air enters the step, the aesthetics deteriorates, so in this embodiment, it is stipulated as follows.

[0168] First, the inventors of the present invention have found that, as described above, when the thicknesses H1 and H2 are specified, when H1 is smaller than H2 (Formula (4)), Figure 7 As shown, the sheet member 8 may form recessed portions on the surface of the intermediate film 5 .

[0169] H1<H2 (4)

[0170] In this case, if Figure 7 and Figure 8 As shown, the above-mentioned point A, point B, point C, distance S1, and distance S2 are defined so as to satisfy the following formula (5) at the location where S1+S2 is minimum.

[0171] S1>S2 (5)

[0172] As a result, in the extension portion 42, the region where the gap R is generated (the region between point A and point B) becomes larger, so that the gap R is hidden in the shielding layer 4, thereby preventing the gap R from being seen from outside and inside the vehicle. In order to satisfy the formula (5), for example, the size of the sheet member 8 or the width of the extension portion 42 (the length from the inner edge of the opening 43 to the outer edge of the extension portion 42) can be adjusted.

[0173] In addition, as a result of the research of the inventor of the present invention, the bubbles retained in the above-mentioned gap R also vary depending on the conditions, and bubbles of various widths (in the direction perpendicular to the outer edge of the sheet member 8) have been confirmed. In order to hide them, S1 is preferably 5 mm or more, more preferably 10 mm or more, and more preferably 20 mm or more. However, when S1 is too large, the opening 43 becomes smaller. Therefore, S2 is preferably 50 mm or less, and more preferably 40 mm or less. In addition, from this point of view, S1+S2 is preferably 10 to 100 mm.

[0174] The inventors of the present invention have found that the gap R is likely to be generated particularly when the following formula (6) is satisfied. Therefore, when the following formula (6) is satisfied, particularly when the formula (5) is satisfied, the gap R can be prevented from being seen from outside the vehicle.

[0175] H2-H1>300μm (6)

[0176] In the above example, any point A on the edge of the opening 43 is studied, and it is particularly preferred that more than 90% of the two side edges and the bottom edge of the opening 43 satisfy the above formulas (2) and (5), and it is further preferred that these formulas are satisfied over the entire circumference.

[0177] <6. Features>

[0178] The windshield described above can provide the following effects.

[0179] (1) When the intermediate film 5 is formed with the shadow region 51, a region through which light from the camera of the imaging device 2 passes can be formed by embedding the transparent sheet member 8 in the shadow region 51. Therefore, the shadow region 51 can be used for light shielding and glare prevention without hindering the imaging of the imaging device 2.

[0180] (2) When the thickness of the sheet member 8 is different from that of the shadow area 51 or the non-shadow area 52, a protrusion or a recess is formed on the surface of the intermediate film 5, thereby generating a step difference between the sheet member 8 and the shadow area (or the non-shadow area 52). Therefore, when manufacturing laminated glass, if air is trapped in the step difference, bubbles may be seen from outside and inside the vehicle. Therefore, in this embodiment, by satisfying the above-mentioned formula (2) or formula (5), the area where the gap R is formed can be hidden by the shielding layer 4, and the air (bubbles) can be suppressed from being seen from outside or inside the vehicle. In particular, in most cases, the shape of the shielding layer 4 is predetermined, and accordingly, S1+S2 is also specified in most cases, so it is meaningful to satisfy the above-mentioned formula (2) or formula (5).

[0181] <7. Modifications>

[0182] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention. The following modified examples can also be appropriately combined.

[0183] <7-1>

[0184] The shape of the shielding layer is not particularly limited, and may be various shapes. That is, at least one opening 43 for photographing may be formed, and the shape of the opening is not particularly limited. Therefore, two or more openings may be formed.

[0185] The opening can be, for example, Fig.10 As shown in the figure, in the area along the opening periphery of the opening 43, there is formed an opening periphery area 431 (refer to the enlarged view) in which a plurality of circular dots (shielding sheets) 435 are separated by specified intervals and arranged in a staggered manner. That is, the opening periphery area 431 is formed of the same material (shielding material) as the shielding layer 4, but the density is reduced compared to the configuration ratio of the same material as the shielding layer 4. The width of the opening periphery area 431, that is, the distance Z from the periphery of the opening 43 is preferably greater than 4 mm, and more preferably greater than 6 mm. In addition, in the opening periphery area 431, the proportion of the dots 435 is preferably, for example, 20 to 80%. Among them, these dots 435 can be formed of a material different from that of the shielding layer 4.

[0186] The reason for providing such an opening peripheral region 431 is as follows. First, since the thermal expansion coefficient of the shielding layer formed of ceramic is different from that of glass, the amount of expansion due to heat absorption is different. Therefore, it is known that when the glass plate is formed, when the glass plate is heated together with the shielding layer, due to the difference in expansion, deformation occurs near the boundary between the shielding layer and the region where the shielding layer is not formed. As a result, a problem such as deformation of the image viewed through the glass plate occurs.

[0187] Therefore, in the present embodiment, as described above, by forming the opening peripheral region 431 formed by the dot pattern, the thermal expansion of the opening peripheral region 431 is made smaller than that of the shielding layer 4. Thus, it is possible to prevent the thermal expansion coefficient from changing sharply at the boundary between the shielding layer 4 (edge ​​of the opening) and the inside of the opening. That is, the density of the ceramic transitions from the shielding layer 4 (edge ​​of the opening) where the density of the ceramic is high, through the opening peripheral region 431 where the density of the ceramic is low, to the inside of the opening where the ceramic is not formed, so the change in the thermal expansion amount becomes slow, thereby suppressing the deformation of the glass plates 11 and 12 near the boundary of the opening 43. Therefore, it is possible to suppress the deformation of the image obtained by the camera 2.

[0188] exist Fig.10 In the example, the opening peripheral area 431 is formed by a staggered dot pattern, but as long as the density of the ceramic can be reduced, it can also be a rectangular shape other than a circle, a polygonal shape, a special shape, etc., and they can be arranged in a staggered manner or at a predetermined interval. In addition, the size of the dot 435 can also be changed. It is also possible to form a linear pattern at predetermined intervals. In addition, the opening peripheral area can be formed by arranging shielding sheets of various shapes at predetermined intervals. For example, the size and shape of the dots can be changed, or the shape of the opening peripheral edge can be made into a curve instead of a straight line.

[0189] In addition, on the outer glass plate 11 and the inner glass plate 12 of the laminated shielding layer 4, the area about 4 to 6 mm further inward from the inner periphery of the opening peripheral area 431 is a deformation area 110 that may be deformed, although there will be some changes depending on the heating process or annealing process (the area further inward than the deformation area 110 is equivalent to the central area of ​​the present invention). Fig.10 In the example of , the inner edge of the deformation region 110 is indicated by a dotted line. Therefore, it is preferable to obtain an image using a camera at a position further inside the deformation region 100. When the width of the deformation region 110 is set large, the central area for obtaining the captured image becomes narrower, so it is preferable to set the width of the deformation region 110 to within 6 mm.

[0190] <7-2>

[0191] In the above embodiment, the shielding layers 4 of the outer glass plate 11 and the inner glass plate 12 are made to have the same shape and are formed at the same position, but the present invention is not limited thereto. That is, as long as the camera 2 can be photographed through the openings 43 of the two shielding layers 4, the shapes of the two may be completely different. In addition, since the laminated glass 10 is arranged at an inclination, the positions of the openings 43 may be matched at an inclination, or may be slightly staggered. In addition, for example, any shielding layer may be formed only on one side of the peripheral portion 41 or the extension portion 42.

[0192] <7-3>

[0193] In the above embodiment, the shielding layer 4 is formed on both the surface of the outer glass plate 11 on the vehicle interior side and the surface of the inner glass plate 12 on the vehicle interior side, but it may be formed on either side. However, when the shielding layer 4 is formed on the surface of the outer glass plate 11 on the vehicle exterior side, for example, the above air may be recognized from the vehicle interior.

[0194] <7-4>

[0195] The shape of the sheet member 8 is not particularly limited, as long as it is at least larger than the opening 43. The position where the sheet member 8 is disposed is also not particularly limited, as long as at least a portion of it overlaps with the shadow region 51.

[0196] <7-5>

[0197] It is also possible to form a plurality of openings 43 in the shielding layer 4. For example Fig.11 As shown, a plurality of openings 43 may be formed in the extension portion 42 of the shielding layer 4, through holes 50 may be formed in the intermediate film 5 in a manner corresponding to the openings 43, and the sheet member 8 may be embedded in each through hole 50. In this case, a plurality of cameras, sensors, etc. may be arranged in a manner corresponding to the openings 43.

[0198] In addition, if Fig.12 As shown, when adjacent openings 43 are close, for example, when the shortest distance L between adjacent openings 43 is shorter than twice S2 corresponding to each opening 43 (S2 defined between adjacent openings), adjacent sheet members 8 can be formed integrally.

[0199] In addition, if Fig.13 As shown, all the plurality of openings 43 can be arranged inside the sheet member 8. In this case, the openings 43 arranged near the outer edge of the sheet member 8 can satisfy the above-mentioned formulas. Fig.13 The S1 is less than 6 mm, and the S2 is greater than 6 mm. In addition, the sheet can be enlarged to a size of, for example, 400 mm in width and 300 mm in length. In this case, among all the openings 43, the above formula (2) or (5) can be satisfied at the location where S1+S2 is the smallest.

[0200] <7-6>

[0201] In the above-mentioned embodiment, as the information acquisition device of the present invention, a photographing device is used, but it is not limited to this, and various information acquisition devices can be used. That is, in order to obtain information from outside the vehicle, as long as it is a device that irradiates and / or receives light, there is no special limitation. For example, various devices such as sensors for measuring vehicle distances, visible light and / or infrared cameras for measuring vehicle distances, light receiving devices that receive signals from outside the vehicle such as optical beacons, and cameras that use visible light and / or infrared rays to read white lines on the road using images can be used. In addition, the number of openings of the shielding layer 4 can be appropriately changed according to the type of information acquisition device. For example, light irradiation and light reception can be performed through dedicated openings, respectively. Among them, the information acquisition device may be in contact with the glass plate or not. In either case, in the glass plate, electric heating lines are formed in the area (information acquisition area) where the light of the information acquisition device passes.

[0202] <7-7>

[0203] In the present invention, laminated glass can be configured as follows in combination with the information obtaining device.

[0204] 1. When using a camera system that works within the visible range, the light transmittance of the A light source of the laminated glass may be less than 70%. Thus, when the light transmittance of the A light source of the laminated glass is less than 70%, the following laminated glass is used. The A light source is one of the three standard light sources A, B, and C specified by the International Commission on Illumination (CIE) agreement, and the A light source is an ordinary gas-filled tungsten incandescent lamp with a color temperature of 2854K.

[0205] (i) The intermediate layer (eg, PVB) may be tinted darker (eg, the outer glass sheet 11 and the inner glass sheet 12 may be transparent glass).

[0206] (ii) The Fe2O3 content of each glass plate 11, 12 as clear glass may be, for example, 0.01 to 0.2 wt%. Alternatively, it may be a combination of colored glass having a Fe2O3 content of 0.5 to 1 wt%, or a combination of colored glass having a Fe2O3 content of 0.5 to 1.5 wt% and clear glass having a Fe2O3 content of generally 0.01 to 0.2 wt%.

[0207] (iii) The thickness of the laminated glass is 3 to 9 mm (the thickness of each glass plate 11 , 12 may be 0.7 to 4 mm).

[0208] (iv) Use a sheet member 8 that is larger than the opening 43 .

[0209] (v) The laminated glass can be used for a windshield on the front side or a rear window glass on the rear side.

[0210] 2. When using the LiDAR system, the light transmittance of the A light source of the laminated glass may be less than 70%. When the light transmittance of the A light source of the laminated glass is less than 70%, the following laminated glass is used.

[0211] (i) The intermediate layer (eg, PVB) is tinted darker (the outer glass sheet 11 and the inner glass sheet 12 are preferably extra-clear glass).

[0212] (ii) The content of Fe2O3 in each of the glass plates 11, 12 as extra-clear glass is, for example, less than 0.1 wt%, preferably less than 0.05 wt%.

[0213] (iii) The thickness of the laminated glass is 3 to 9 mm (the thickness of each glass plate 11 , 12 may be 0.7 to 4 mm).

[0214] (iv) Use a sheet member 8 that is larger than the opening 43 .

[0215] (v) The laminated glass can be used for a windshield on the front side or a rear window glass on the rear side.

[0216] 3. When using the LiDAR system, the light transmittance of the A light source of the laminated glass can exceed 70%. When the light transmittance of the A light source of the laminated glass exceeds 70%, the following laminated glass is used.

[0217] (i) The middle layer (such as PVB) provides solar control properties by absorption (Tts may be, for example, less than 65%, preferably less than 60%, and more preferably less than 55%).

[0218] (ii) The outer glass plate 11 and the inner glass plate 12 may be ultra-transparent glass (the content of Fe2O3 is, for example, less than 0.1 wt%, preferably less than 0.05 wt%).

[0219] (iii) The thickness of the laminated glass is 3 to 9 mm (the thickness of each glass plate 11 , 12 may be 0.7 to 4 mm).

[0220] (iv) Use a sheet member 8 that is larger than the opening 43 .

[0221] (v) The laminated glass can be used for a windshield on the front side or a rear window glass on the rear side.

[0222] Among them, Tts can be calculated by measuring the transmittance / reflectance at a wavelength of 300 nm to 2500 nm using a spectrophotometer ("U-4100" manufactured by Hitachi High-Technologies Corporation) in accordance with ISO 13837. From the viewpoint of further improving the heat insulation, Tts is preferably 70% or less, more preferably 65% ​​or less, and even more preferably 60% or less.

[0223] <7-8>

[0224] In the above-mentioned embodiment, the laminated glass of the present invention is used as a windshield, but it can also be used for a rear window glass, a side window glass, etc. Alternatively, it can also be used for vehicles other than automobiles (trains, etc.).

Claims

1. A laminated glass capable of being provided with an information acquisition device for acquiring information from outside the vehicle by irradiating and / or receiving light, wherein the laminated glass has: Outer glass panels; Inner glass panel; an intermediate film having solar control properties disposed between the outer glass sheet and the inner glass sheet; and a shielding layer laminated on at least one of the surface of the outer glass plate on the vehicle interior side and the surface of the inner glass plate on the vehicle interior side, The laminated glass is configured so that the light transmittance of the A light source specified in CIE exceeds 70%. The intermediate film is formed with a through hole, and a transparent sheet member is embedded in the through hole. The shielding layer has at least one opening formed at a position corresponding to the sheet member and located further inward than an edge of the sheet member. The light of the information obtaining device passes through the opening, The thickness of the laminated glass at the center point of the sheet member is defined as H1, and the thickness of the laminated glass at a distance of 400 mm from the edge of the sheet member on a virtual line passing through the center point and extending in the horizontal direction is defined as H2, Further, when an arbitrary point A of the inner edge of the opening, a point B at which the outer edge of the sheet member is shortest from the point A, and a point C at which a virtual line extending from the point A through the point B intersects the outer edge of the shielding layer are defined, The distance between the point A and the point B is defined as S1, and the distance between the point B and the point C is defined as S2, When H1 is greater than H2, the structure is such that at the point where S1+S2 is the smallest, S1 is less than S2. When H1 is smaller than H2, S1 is larger than S2 at the position where S1+S2 is minimum.

2. The laminated glass according to claim 1, characterized in that: When H1 is greater than H2, the distance S2 is 5 to 50 mm.

3. The laminated glass according to claim 1, wherein: When H1 is smaller than H2, the distance S1 is 5 to 50 mm.

4. The laminated glass according to claim 2 or 3, characterized in that: S1+S2 is less than 100mm.

5. The laminated glass according to any one of claims 1 to 4, characterized in that: A plurality of openings are formed, When the shortest distance between the adjacent openings is shorter than the sum of S2 associated with the respective openings, the sheet members corresponding to the respective openings are formed integrally.

6. The laminated glass according to any one of claims 1 to 5, characterized in that: The shielding material forming the shielding layer and the glass plate have different thermal expansion coefficients. The glass sheet and the shielding layer are formed by heating together, An opening peripheral region in which the shielding material is arranged at a small ratio per unit area is formed in at least a portion of the inner peripheral region of the opening of the shielding layer. The light is configured to pass through a region further inside the opening peripheral region.

7. The laminated glass according to claim 6, characterized in that: The opening peripheral region is formed over the entire circumference of the inner peripheral edge of the opening.

8. The laminated glass according to claim 6 or 7, characterized in that: The interior of the opening peripheral region of the laminated glass is composed of a deformation region along the inner periphery of the opening peripheral region and a central region adjacent to the inner side of the deformation region. The light is configured to pass through the entire or a portion of the central area.

9. The laminated glass according to claim 8, characterized in that: The width of the deformation area is less than 6 mm.

10. The laminated glass according to any one of claims 6 to 9, characterized in that: The opening peripheral area has a plurality of shielding pieces formed by the shielding material, The plurality of shielding sheets are arranged at intervals from each other.

11. The laminated glass according to claim 10, characterized in that: Each of the shielding pieces is formed in a circular shape.

12. The laminated glass according to claim 10 or 11, characterized in that: The shielding sheets are arranged in a staggered manner.

13. The laminated glass according to any one of claims 6 to 12, characterized in that: At least a portion of the shielding layer is black.

14. The laminated glass according to any one of claims 6 to 13, characterized in that: The interior of the opening peripheral region of the laminated glass is composed of a deformation region along the inner periphery of the opening peripheral region and a central region adjacent to the inner side of the deformation region. In the shielding layer, the opening peripheral region and the deformation region, an electromagnetic wave shielding film is formed in at least a portion of a region where the information acquisition device is installed.

15. The laminated glass according to claim 14, characterized in that: The shielding layer, the opening peripheral region, and at least a portion of the deformation region are formed by arranging a first vision shielding film, the electromagnetic wave shielding film, and a second vision shielding film in this order from the vehicle exterior to the vehicle interior.

16. The laminated glass according to any one of claims 1 to 15, characterized in that: The sheet member is larger than a square with a side of 100 mm and smaller than a square with a side of 300 mm.

17. The laminated glass according to any one of claims 1 to 16, characterized in that: The intermediate film is composed of multiple layers.

18. The laminated glass according to claim 17, wherein: The intermediate film at least comprises a core layer and a pair of outer layers sandwiching the core layer. The Young's modulus of the core layer is 20 MPa or less at 20° C. and 100 Hz.

19. The laminated glass according to any one of claims 1 to 18, characterized in that: Two to four through holes are formed, and the sheet member is fitted into each of the through holes.

20. The laminated glass according to any one of claims 1 to 19, characterized in that: The cross section in the vertical direction is formed into a wedge shape.

21. The laminated glass according to any one of claims 1 to 20, characterized in that: The thickness of the outer glass plate is smaller than the thickness of the inner glass plate.

22. The laminated glass according to any one of claims 1 to 21, characterized in that: It is used as a windshield.

23. The laminated glass according to any one of claims 1 to 22, characterized in that: It is used as rear window glass.

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