Laminated glass

Abstract

The present application provides a kind of interlayer glass capable of configuring information acquisition device by carrying out the illumination and / or light receiving of light and obtains information from outside the vehicle, above-mentioned interlayer glass has: outer glass plate;Inner glass plate;With the intermediate film being arranged between above-mentioned outer glass plate and inner glass plate, above-mentioned intermediate film has: shaded area being colored;Transparent non-shaded area;And the transparent sheet component embedded across the through hole formed in above-mentioned shaded area and above-mentioned non-shaded area, above-mentioned information acquisition device is configured to be opposite to above-mentioned sheet component, the thickness of above-mentioned interlayer glass at the center point of above-mentioned sheet component is H1, and the thickness of above-mentioned interlayer glass at the distance of 400mm from the edge of above-mentioned sheet component on the virtual line extending along the horizontal direction through above-mentioned center point is defined as H2, when, satisfy following formula (1):0<|H1-H2|<120 μm (1).

Description

TECHNICAL FIELD

[0001] In a vehicle laminated glass in which an interlayer film is arranged between a pair of glass sheets, particularly a windshield, in order to improve anti-glare properties, heat insulation properties, and the like, a band-shaped shaded region colored green, blue, or the like is sometimes formed. The shaded region is sometimes provided on the surface of the glass sheet, but is mostly formed by band-shaped coloring of a portion of the interlayer film. On the other hand, in a windshield, in order to have a legal field of view region in which the visible light transmittance is a prescribed value or more (for example, 70% or more), the shaded region of the windshield is arranged outside the field of view region, that is, is usually arranged in the upper portion of the windshield.

[0002] However, in recent years, the safety performance of automobiles is being dramatically improved, and as one of them, in order to avoid collision with a preceding vehicle, a safety system that senses the distance to the preceding vehicle and the speed of the preceding vehicle and automatically brakes when abnormally close is proposed.

[0003] In such a system, using a device such as a laser radar or a camera, the distance to the preceding vehicle and the like is measured using laser light or infrared light and the like. Also, in order to ensure safety and sufficiently exert the function of the device, it is desirable to install these devices in the upper portion of the windshield.

[0004] However, since the shaded region is formed in the upper portion of the windshield as described above, when installing a device such as a laser radar, it is necessary to form an opening through which the light of the camera and the like can pass in the shaded region. Therefore, for example, a method is disclosed in Patent Literature 1.

[0005] That is, in Patent Literature 1, a through-hole is formed in the shaded region, and a transparent sheet member is inserted into the through-hole, so that by the sheet member, it is possible to perform an outside vehicle photographing using a camera.

[0006] PRIOR ART DOCUMENTS

[0007] PATENT LITERATURE

[0008] Patent Literature 1: International Publication No. 2003 / 059837 SUMMARY

[0009] PROBLEMS TO BE SOLVED BY THE INVENTION

[0010] However, since the sheet member and the shadow region are separate members, it is very difficult to make their thicknesses exactly the same, and in the case where there is a difference in thickness, a step difference is sometimes generated at the boundary between the sheet member and the shadow region. The inventors of the present application found that, in this case, the glass plate sandwiching the interlayer film does not come into contact with the interlayer film in a manner that presses the step difference flat, but rather the glass plate bends along the sheet. In this way, when the glass plate bends, there is a possibility that a perspective distortion occurs in the portion where the sheet member is provided. This is not limited to a windshield, but is also a technical problem that can occur in other laminated glasses.

[0011] The present application was made to solve the above-described technical problem, and has an object to provide a laminated glass in which, even if the thickness of a sheet member and a shadow region (or a non-shadow region described later) is different, a perspective distortion can be suppressed.

[0012] Technical solution for solving the technical problem

[0013] Item 1. A laminated glass that can be configured with an information obtaining device that obtains information from the outside of a vehicle by performing irradiation and / or reception of light, the laminated glass having:

[0014] an outer glass plate;

[0015] an inner glass plate; and

[0016] an interlayer film disposed between the outer glass plate and the inner glass plate,

[0017] the interlayer film having:

[0018] a shadow region that is colored;

[0019] a non-shadow region that is transparent; and

[0020] a sheet member that is transparent and is embedded across a through-hole formed in the shadow region and the non-shadow region,

[0021] the information obtaining device being disposed opposite the sheet member,

[0022] when the thickness of the laminated glass at a center point of the sheet member is set as H1, and the thickness of the laminated glass at a position 400 mm away from the edge portion of the sheet member on a virtual line that passes through the center point and extends in the horizontal direction is set as H2, the following formula (1) is satisfied,

[0023] 0 < |H1 - H2| < 120 μm (1).

[0024] Item 2. The laminated glass according to Item 1, satisfying the following formula (2),

[0025] 0 < |H1 - H2| < 40 μm (2).

[0026] Item 3. The laminated glass according to any one of items 1 and 2, wherein the length in the left-right direction of the sheet member is 150 mm or more.

[0027] Item 4. The laminated glass according to item 3, wherein the shielding material forming the shielding layer and the glass sheet have different thermal expansion rates,

[0028] the glass sheet and the shielding layer are formed by being heated together,

[0029] an opening peripheral edge region in which the proportion of the shielding material per unit area is small is formed in at least a part of the inner periphery of the opening along the shielding layer,

[0030] is configured so that the light passes through a region further inside the opening peripheral edge region.

[0031] Item 5. The laminated glass according to item 4, wherein the opening peripheral edge region is formed over the entire periphery of the inner periphery of the opening.

[0032] Item 6. The laminated glass according to any one of items 4 and 5, wherein the inside of the opening peripheral edge region of the laminated glass is composed of a deformation region along the inner periphery of the opening peripheral edge region and a central region adjacent to the inside of the deformation region,

[0033] is configured so that the light passes through all or a part of the central region.

[0034] Item 7. The laminated glass according to item 6, wherein the width of the deformation region is 6 mm or less.

[0035] Item 8. The laminated glass according to any one of items 4 to 7, wherein the opening peripheral edge region has a plurality of shielding pieces formed of the shielding material,

[0036] the plurality of shielding pieces are arranged at intervals from each other.

[0037] Item 9. The laminated glass according to item 8, wherein each of the shielding pieces is formed in a circular shape.

[0038] Item 10. The laminated glass according to any one of items 8 and 9, wherein the shielding pieces are arranged in a staggered manner.

[0039] Item 11. The laminated glass according to any one of items 4 to 10, wherein at least a part of the shielding layer is black.

[0040] Item 12. The laminated glass according to any one of items 4 to 11, wherein

[0041] In the aforementioned shielding layer, the area surrounding the opening, and the deformation area, at least a portion of the area where the aforementioned information acquisition device is installed is formed with an electromagnetic wave shielding film.

[0042] Item 13. The laminated glass as described in Item 12, wherein at least a portion of the shielding layer, the periphery region of the opening, and the deformation region are formed by sequentially arranging the first field-of-view shielding film, the electromagnetic wave shielding film, and the second field-of-view shielding film from the outside of the vehicle to the inside of the vehicle.

[0043] Item 14. The laminated glass as described in any one of items 1 to 13, wherein the sheet component is larger than a square with one side of 100 mm and smaller than a square with one side of 300 mm.

[0044] Item 15. The laminated glass as described in any one of items 1 to 14, wherein 2 to 4 of the aforementioned through holes are formed, and the sheet component is embedded in each of the aforementioned through holes.

[0045] Item 16. The laminated glass as described in any one of items 1 to 15, wherein the cross-section in the vertical direction is formed in a wedge shape.

[0046] Item 17. The laminated glass as described in any one of items 1 to 16, wherein the thickness of the outer glass plate is less than the thickness of the inner glass plate.

[0047] Item 18. The laminated glass as described in any one of Items 1 to 17, used as a windshield.

[0048] Item 19. The laminated glass as described in any one of items 1 to 18, used as a rear window glass.

[0049] Invention Effects

[0050] Using this invention, perspective distortion can be reduced. Attached Figure Description

[0051] Figure 1 This is a top view showing one embodiment of the laminated glass involved in the present invention.

[0052] Figure 2 yes Figure 1 Cross-sectional view.

[0053] Figure 3 This is a top view of the intermediate membrane.

[0054] Figure 4 It is a block diagram showing the general structure of an in-vehicle system.

[0055] Figure 5 yes Figure 2 A-A line cross-sectional view.

[0056] Figure 6 is a cross-sectional view taken along line A-A of Figure 2 .

[0057] Figure 7 is a partial plan view of the laminated glass.

[0058] Figure 8 is a partial plan view of the laminated glass.

[0059] Figure 9 is a plan view showing other examples of the opening of the shielding layer.

[0060] Figure 10 is a plan view showing other examples of the opening of the shielding layer.

[0061] Figure 11A is a graph showing the cross-sectional shape of Example 1.

[0062] Figure 11B is a graph showing the cross-sectional shape of Example 2.

[0063] Figure 11C is a graph showing the cross-sectional shape of Example 3.

[0064] Figure 11D is a graph showing the cross-sectional shape of Example 4.

[0065] Figure 11E is a graph showing the cross-sectional shape of Example 5.

[0066] Figure 11F is a graph showing the cross-sectional shape of Example 6.

[0067] Figure 11G is a graph showing the cross-sectional shape of Example 7.

[0068] Figure 11H is a graph showing the cross-sectional shape of Example 8.

[0069] Figure 11I is a graph showing the cross-sectional shape of Example 9. DETAILED DESCRIPTION

[0070] Hereinafter, one embodiment in which the laminated glass according to the present application is applied to a windshield will be described. First, the configuration of the windshield according to the present embodiment will be described using Figure 1 and Figure 2 . Figure 1 is a plan view of the windshield, Figure 2 is a cross-sectional view of Figure 1 . In the drawings, the up-down direction of Figure 1 will be referred to as "up-down", "vertical", and "longitudinal", and the left-right direction will be referred to as "left-right", "horizontal", and "lateral".Figure 1 The left and right directions are called "left and right". Figure 1 The example shows the windshield as seen from inside the car. That is, Figure 1 The back of the paper is the outside of the car. Figure 1 The front side of the paper is the inside of the car.

[0071] The windshield has a trapezoidal laminated glass 10, which is installed at an angle within the vehicle body. The laminated glass 10 has an outer glass panel 11, an inner glass panel 12, and an interlayer film 5 disposed between them. A shielding layer 4 is laminated on the inner side of the outer glass panel 11 and the inner side of the inner glass panel 12, blocking the view from outside the vehicle. An opening 43 is formed in the shielding layer 4, through which a camera 2 disposed inside the vehicle can be used to photograph the outside situation. That is, the opening 43 constitutes a camera window. Furthermore, a frame-shaped bracket 6 is fixed to the shielding layer 4 of the inner glass panel 12, and the camera 2 is mounted on the bracket 6. The bracket 6 is formed on the frame and fixed to the shielding layer 4, so the bracket 6 is not visible from outside the vehicle. The constituent elements will be described in detail below.

[0072] <1. Laminated Glass>

[0073] Figure 2 This is a cross-sectional view of the laminated glass. As shown in the figure, the laminated glass 10 has an outer glass plate 11 and an inner glass plate 12, with a resin interlayer 5 disposed between these glass plates 11 and 12. Their structure will be described below.

[0074] <1-1. Glass Plate>

[0075] First, the description will begin with the outer glass panel 11 and the inner glass panel 12. The outer glass panel 11 and the inner glass panel 12 can be made of known glass panels, or they can be formed from heat-absorbing glass, general transparent glass, green glass, or UV green glass. However, these glass panels 11 and 12 need to achieve visible light transmittance that meets the safety standards of the countries where automobiles are used. For example, it is possible to adjust the outer glass panel 11 to ensure the necessary sunlight absorption rate, and to use the inner glass panel 12 to ensure that the visible light transmittance meets safety standards. Hereinafter, examples of transparent glass, heat-absorbing glass, and soda-lime glass are given.

[0076] (Transparent glass)

[0077] SiO2: 70-73% by mass;

[0078] Al2O3: 0.6–2.4% by mass;

[0079] CaO: 7-12% by mass;

[0080] MgO: 1.0 to 4.5 mass%

[0081] R2O: 13 to 15 mass% (R is an alkali metal)

[0082] Total iron (T-Fe2O3) converted into Fe2O3: 0.08 to 0.14 mass%.

[0083] (Endothermic glass)

[0084] The composition of the endothermic glass can be, for example, such that, based on the composition of the transparent glass, the ratio of total iron (T-Fe2O3) converted into 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 glass framework component (mainly SiO2 or Al2O3) is reduced only by the amount of increase of T-Fe2O3, CeO2, and TiO2.

[0085] (Soda-lime glass)

[0086] SiO2: 65 to 80 mass%

[0087] Al2O3: 0 to 5 mass%

[0088] CaO: 5 to 15 mass%

[0089] MgO: 2 mass% or more

[0090] NaO: 10 to 18 mass%

[0091] K2O: 0 to 5 mass%

[0092] MgO + CaO: 5 to 15 mass%

[0093] Na2O + K2O: 10 to 20 mass%

[0094] SO3: 0.05 to 0.3 mass%

[0095] B2O3: 0 to 5 mass%

[0096] Total iron (T-Fe2O3) converted into Fe2O3: 0.02 to 0.03 mass%.

[0097] The thickness of the laminated glass 10 according to the present embodiment is not particularly limited, and 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, and from the viewpoint of lightweight, 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, the total thickness of the outer glass plate 11 and the inner glass plate 12 needs to be reduced, and thus the thickness of each glass plate is not particularly limited, and for example, the thickness of the outer glass plate 11 and the inner glass plate 12 can be determined as described below.

[0098] The outer glass plate 11 mainly requires durability against damage from the outside and impact resistance, and as a windshield for a vehicle, requires impact resistance against flying objects such as small stones. On the other hand, the greater the thickness, the greater the weight, and thus is not preferable. From this viewpoint, 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 adopt can be determined depending on the use of the glass.

[0099] The thickness of the inner glass plate 12 can be the same as that of the outer glass plate 11, and for example, in order to reduce the weight of the laminated glass 10, the thickness can be made 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, more preferably 0.8 to 1.6 mm, and particularly preferably 1.0 to 1.4 mm. Further preferably, the thickness is 0.8 to 1.3 mm. Which thickness to adopt for the inner glass plate 12 can also be determined depending on the use of the glass.

[0100] Here, one example of a method for measuring the thickness of the glass plate (laminated glass) 1 when bent will be described. First, as to the measurement position, two positions in the up-and-down direction on the center line S extending in the left-and-right direction of the glass plate. The measurement device is not particularly limited, and for example, a thickness gauge such as SM-112 manufactured by Teclock Co., Ltd. can be used. When measurement is performed, the glass plate is arranged so that the curved surface of the glass plate is placed on a flat surface, and the end portion of the glass plate is gripped by the thickness gauge to perform measurement. In addition, measurement can also be performed in the same manner as when bent, when the glass plate is flat.

[0101] <1-2. Interlayer Film>

[0102] Figure 3 is a plan view of the interlayer film. As shown in Figure 3 the interlayer film 5 is formed to be the same size as each of the glass plates 11 and 12, and has a band-shaped shaded area 51 constituting the upper end portion of the interlayer film 5, a non-shaded area 52 connected to the lower end of the shaded area 51 and occupying most of the interlayer film 5, and a sheet member 8 arranged between the shaded area 51 and the non-shaded area 52.

[0103] The shaded area 51 is an area in which the transmittance of visible light is high, and can be colored black, green, blue, etc. This shaded area 51 realizes various functions (anti-glare, heat shielding, etc.) with light reduction. On the other hand, the non-shaded area is not colored and is a transparent area.

[0104] With regard to the interlayer film 5, both the shaded area 51 and the non-shaded area 52 are formed of at least one layer, and as one example of the non-shaded area 52, as shown in the enlarged view of Figure 2 However, the configuration is not limited to this, and it is sufficient that the interlayer film 5 is formed of a plurality of layers having the core layer 521 and at least one outer layer 522 disposed on the outer side glass plate 11 side. For example, the interlayer film 5 can be formed of two layers including the core layer 521 and one outer layer 522 disposed on the outer side glass plate 11 side, or the interlayer film 5 can be formed of an even number of layers in which the core layer 521 is at the center and two outer layers 522 are disposed on each side, or the interlayer film 5 can be formed of one side having an odd number of outer layers 522 and the other side having an even number of outer layers 522 with the core layer 521 interposed therebetween. In the case where only one outer layer 522 is provided, it is disposed on the outer side glass plate 11 side as described above, in order to improve the breakage resistance to external force from the outside of the vehicle or the outside of the house. In addition, the number of layers of the outer layer 522 is increased, and the sound insulation performance is also improved.

[0105] The core layer 521 is soft compared to the outer layer 522, and the hardness is not particularly limited. The material constituting each layer 521, 522 is not particularly limited, and 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, further preferably 1 to 18 MPa, and particularly preferably 1 to 14 MPa at a frequency of 100 Hz and a temperature of 20 degrees. In this range, the sound transmission loss (STL) can be prevented from decreasing in the low frequency domain of approximately 3500 Hz or less. On the other hand, the Young's modulus of the outer layer 522 is preferably large in order to improve the sound insulation performance in the high frequency domain, as described later, 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 for example, it can be set from the viewpoint of processability. For example, when it is 1750 MPa or more, the processability, and in particular, the cutting, is known to become difficult.

[0106] Furthermore, as a specific material, the outer layer 522 can be made of, for example, polyvinyl butyral resin (PVB). PVB resin is preferred because it exhibits excellent adhesion to each glass plate and excellent penetration resistance. On the other hand, the core layer 521 can be made of, for example, ethylene vinyl acetate resin (EVA), or a polyvinyl acetal resin that is softer than the PVB 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 sound insulation performance.

[0107] Generally, the hardness of polyvinyl acetal resin can be controlled by (a) the degree of polymerization of the polyvinyl alcohol used as the starting material, (b) the degree of acetalization, (c) the type of plasticizer, and (d) the proportion of plasticizer added. Therefore, by appropriately adjusting at least one of these conditions, even using the same polyvinyl butyral resin, it is possible to produce a rigid polyvinyl butyral resin for the outer layer 522 and a soft polyvinyl butyral resin for the core layer 521. Furthermore, the hardness of polyvinyl acetal resin can also be controlled by the type of aldehyde used for acetalization, by co-acetalization using multiple aldehydes, or by pure acetalization using a single aldehyde. While not always the case, polyvinyl acetal resins obtained using aldehydes with more carbon atoms tend to be softer. Therefore, for example, if the outer layer 522 is made of polyvinyl butyral resin, the core layer 521 can be made of polyvinyl acetal resin obtained by acetalizing aldehydes (e.g., n-hexanal, 2-ethylbutanal, n-heptanal, n-octanal) with 5 or more carbon atoms using polyvinyl alcohol. However, the resin is not limited to the above-mentioned resins, provided that a specified Young's modulus can be obtained.

[0108] The shaded area 51 is also composed of the same layers as the non-shaded area 52, for example, it can be composed of a core layer and a pair of outer layers sandwiching it. As described above, the shaded area 51 is colored, for example, by using a coloring agent such as a pigment or dye to color either or more of the core layer and the outer layer. As pigments, for example, organic pigments such as azo, phthalocyanine, and quinacridone pigments, and inorganic pigments such as metal oxides and metal powders can be used.

[0109] When using pigments, a colored core layer and a non-colored transparent outer layer are produced by extrusion molding using a resin composition obtained by mixing pigments with resin and plasticizer, and a resin composition (resin and plasticizer) without pigments. The outer layer is then used to hold the core layer and mold it, thereby obtaining the colored shaded area 51. On the other hand, when using dyes, a mask is used to expose the area in the intermediate film 5 where the shaded area 51 is to be formed, and the dye is applied to that area. The dye can be applied, for example, by spraying or printing.

[0110] Next, the sheet component 8 will be described. For example... Figure 3As shown, in the center of the interlayer film in the left-right direction, a rectangular through-hole 50 is formed so as to straddle the boundary between the shaded area 51 and the non-shaded area, and the sheet member 8 described above is disposed in the through-hole 50. That is, by combining the rectangular recess formed at the lower end of the shaded area 51 and the rectangular recess formed near the center of the upper end of the non-shaded area 52, the through-hole 50 described above can be formed. The sheet member 8 is formed of a transparent material, and can be composed of one layer, or can be composed of multiple layers like the shaded area 51 or the non-shaded area 52. In the case where it is composed of one layer, it can be formed of any of the materials of the core layer or the outer layer described above.

[0111] The sheet member 8 is disposed at a position corresponding to the extension 42 of the shielding layer 4 described later, and the opening 43 formed in the extension 42 is located inside the sheet member 8. Therefore, the sheet member 8 is disposed inside the opening 43.

[0112] In addition, the total thickness of the interlayer film 5 is not particularly limited, and is preferably 0.3 to 6.0 mm, further 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 further 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 further preferably 0.1 to 1.0 mm. Furthermore, the total thickness of the interlayer film 5 can be fixed, and the thickness of the core layer 521 can be adjusted therein.

[0113] The thickness of the core layer 521 and the outer layer 522 can be measured, for example, as follows. First, the cross section of the laminated glass is enlarged to 175 times using a microscope (for example, VH-5500 manufactured by Keyence Corporation), and then displayed. 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, and the average value is used as the thickness of the core layer 521 and the outer layer 522. For example, an enlarged photograph of the cross section of the laminated glass is taken, and the thickness is measured after the core layer 521 and the outer layer 522 are determined therefrom.

[0114] Furthermore, the thickness of the core layer 521 and outer layer 522 of the interlayer film 5 does not need to be constant across the entire surface; for example, it can be wedge-shaped when used in laminated glass for head-up displays. In this case, the thickness of the core layer 521 and outer layer 522 of the interlayer film 5 is measured at the part with the smallest thickness, i.e., the bottom edge of the laminated glass. When the interlayer film 5 is wedge-shaped, the outer and inner glass plates are not arranged in parallel, but such an arrangement is also included in the glass plates of the present invention. That is, in the present invention, for example, the arrangement of the outer and inner glass plates when using the interlayer film 5 is included, where the thickness of the core layer 521 or outer layer 522 varies at a rate of less than 3 mm per 1 m.

[0115] The manufacturing method of the intermediate film 5 is not particularly limited. Examples include: uniformly mixing the aforementioned resin components such as polyvinyl acetal resin, plasticizer, and other additives as needed, and then integrally extruding each layer; or stacking two or more resin films produced using this method using pressing, lamination, or other methods. The resin film used in the stacking method (pressing, lamination, etc.) before stacking can be a single-layer structure or a multi-layer structure. Furthermore, the intermediate film 5 can be formed from a single layer in addition to the multi-layer structure described above. Moreover, the sheet component 8 can be embedded after forming the through-holes 50 as described above.

[0116] <2. Overview of the Shielding Layer>

[0117] Next, the shielding layer 4 will be explained. For example... Figure 1 As shown, the shielding layer 4 is laminated on the inner side of each glass panel 11, 12. More specifically, it has a peripheral portion 41 that is laminated around the periphery of each glass panel 11, 12, and a rectangular extension 42 that is connected to the peripheral portion 41 and extends downward from near the center of the upper edge of each glass panel 11, 12. A trapezoidal opening 43 is formed at the lower end of the extension 42, through which the imaging device 2 mounted on the inner side of the vehicle can capture images of the outside of the vehicle. In addition, the boundary 53 of the shaded area 51 and the non-shaded area 52 of the interlayer film 5 extends horizontally through the opening 43.

[0118] like Figure 2 As shown, the aforementioned bracket 6 is fixed to the shielding layer 4. Specifically, the bracket 6 is formed in the shape of a frame surrounding the opening and is fixed to the shielding layer 4 using double-sided tape, adhesive, etc. Furthermore, the camera device 2 is supported by this bracket 6 and takes pictures of the exterior of the vehicle through the opening 43. Additionally, although not shown in the figure, a cover is installed on the bracket 6 so that the camera device 2 is not visible from inside the vehicle.

[0119] 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, for example, a dark-colored ceramic such as black, brown, gray, dark blue, or the like can be selected, as long as the view from the outside of the vehicle can be shielded.

[0120] In the case where the material of the shielding layer 4 is a black ceramic, for example, on the inner surface of the inner glass plate 12, a black ceramic is layered by screen printing or the like, and the layered ceramic is heated together with each glass plate 11, 12. Then, when the ceramic is hardened, the shielding layer 4 is completed. Here, the ceramic utilized by each shielding layer 4 can utilize various materials. For example, the shielding layer 4 can utilize a ceramic having the composition shown in Table 1 below.

[0121] [Table 1]

[0122] First and second colored ceramic pastes Pigment *1 Mass % 10 Resin (cellulose resin) Mass % 10 Organic solvent (pine oil) Mass % 10 Glass adhesive *2 Mass % 70 Viscosity dPs 150

[0123] *1, Main components: copper oxide, chromium oxide, iron oxide, and manganese oxide;

[0124] *2, Main components: bismuth borosilicate, zinc borosilicate.

[0125] <3. Vehicle-mounted system>

[0126] Next, a vehicle-mounted system having the imaging device 2 and the image processing device 3 will be described. Figure 2 and Figure 4 Figure 4 The configuration of the vehicle-mounted system will be exemplified. As exemplified in Figure 4 the vehicle-mounted system according to the embodiment has the above-described imaging device 2 and the image processing device 3 connected to the imaging device 2.

[0127] The image processing device 3 is a device that processes an imaging image obtained by the imaging device 2. For example, as a hardware configuration, the image processing device 3 has a storage section 31, a control section 32, an input / output section 33, and the like connected by a bus, which are conventional hardware. However, the hardware configuration of the image processing device 3 is not limited to this example, and regarding the specific hardware configuration of the image processing device 3, addition, omission, and addition of configuration elements can be appropriately made according to the embodiment.

[0128] The storage section 31 stores various data and programs (not shown) utilized in the processing performed by the control section 32. The storage section 31 can be realized by, for example, a hard disk, or can be realized by a recording medium such as a USB memory. In addition, the various data and programs stored in the storage section 31 can be obtained from a recording medium such as a CD (Compact Disc, optical disc) or a DVD (Digital Versatile Disc, digital versatile optical disc). In addition, the storage section 31 can be referred to as an auxiliary storage device. ​

[0129] As described above, the laminated glass 10 is arranged in an inclined posture with respect to the vertical direction and is curved. Also, the imaging device 2 images the situation outside the vehicle via such a laminated glass 10. Therefore, the captured image obtained by the imaging device 2 is distorted depending on the posture, shape, refractive index, optical defects, and the like of the laminated glass 10. In addition, the camera lens of the imaging device 2 also applies an inherent aberration. Therefore, the correction data for correcting the image distorted due to the aberration of such a laminated glass 10 and the camera lens can also be stored in the storage section 31.

[0130] The control section 32 has one or a plurality of processors such as a microprocessor or a CPU (Central Processing Unit) and peripheral circuits (ROM (Read Only Memory), RAM (Random Access Memory), an interface circuit, and the like) used in the processing of the processor. The ROM, RAM, and the like can also be referred to as a main storage device in the sense of the address space handled by the processor arranged in the control section 32. The control section 32 functions as an image processing section 321 by executing various data and programs stored in the storage section 31.

[0131] The image processing section 321 processes the captured image obtained by the imaging device 2. The processing of the captured image can be appropriately selected depending on the embodiment. For example, the image processing section 321 analyzes the captured image by pattern matching or the like, and thus the recognition of the subject imaged by the captured image can be performed. In the present embodiment, the imaging device 2 images the situation in front of the vehicle, and thus the image processing section 321 can further determine whether or not a living being such as a person is captured in front of the vehicle on the basis of the subject recognition. Also, in the case where a person is captured in front of the vehicle, the image processing section 321 can output warning information in a prescribed manner. For example, the image processing section 321 can also perform prescribed processing on the captured image. Also, the image processing section 321 can output the processed captured image to a display device (not shown) such as a display connected to the image processing device 3.

[0132] The input / output section 33 is one or a plurality of interfaces for transmitting and receiving data with devices existing outside the image processing device 3. The input / output section 33 is, for example, an interface for connection with a user interface, or an interface such as a USB (Universal Serial Bus). In the present embodiment, the image processing device 3 is connected to the imaging device 2 via the input / output section 33, and obtains the captured image imaged by the imaging device 2.

[0133] Such an image processing apparatus 3 can be a general-purpose apparatus such as a PC (Personal Computer), a tablet terminal, or the like, in addition to an apparatus designed exclusively for the service provided.

[0134] In addition, the photographing apparatus 2 is mounted on the bracket 6 as described above. Therefore, in this state, the mounting of the photographing apparatus 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 photographing apparatus 2 passes through the opening 43. In addition, a cover, not shown, is mounted on the bracket 6 so as to cover the photographing apparatus 2. Therefore, the photographing apparatus 2 is disposed in a space surrounded by the laminated glass 10, the bracket 6, and the cover, and is not visible from the inside of the vehicle, and even if it is visible from the outside of the vehicle, only a part of the photographing apparatus 2 is visible through the opening 43 due to the shielding layer 4. Furthermore, the photographing apparatus 2 and the input / output section 33 described above are connected by a cable, not shown, which is drawn out from the cover and connected to the image processing apparatus 3 disposed at a prescribed position in the vehicle interior.

[0135] <4. Method of manufacturing windshield>

[0136] Next, a method of manufacturing the windshield will be described. First, the shielding layer 4 is layered on each of the glass sheets 11, 12 formed into a prescribed shape. Next, these glass sheets 11, 12 are shaped in a curved manner. This method is not particularly limited, and for example, a publicly known press molding can be used. Alternatively, after the outer glass sheet 11 and the inner glass sheet 12 are overlapped and disposed on a molding die, the molding die is heated by passing through a heating furnace. By this, the glass sheets 11, 12 can be curved by their own weight.

[0137] By this operation, immediately after the outer glass sheet 11 and the inner glass sheet 12 are shaped, a layered body in which the interlayer film 5 is sandwiched between the outer glass sheet 11 and the inner glass sheet 12 is formed. Here, the interlayer film 5 is formed into a shape larger than the glass sheets 11, 12.

[0138] Next, the layered body is put into a rubber bag, and pre-bonding is performed at about 70 to 110°C while reducing the pressure and sucking. The method of pre-bonding can also be performed by a method other than this, and a method as follows can also be used. For example, the layered body is heated at 45 to 65°C using an oven. Next, the layered body is pressed at 0.45 to 0.55 MPa using a roller. Next, after the layered body is heated at 80 to 105°C using an oven again, it is pressed again at 0.45 to 0.55 MPa using a roller. By this, the pre-bonding is completed.

[0139] Next, the main bonding is performed. For the pre-bonded laminate, the main bonding is performed using an autoclave, for example, at 8–15 atmospheres and 100–150°C. Specifically, the main bonding can be performed, for example, at 14 atmospheres and 135°C. Through the above pre-bonding and main bonding, the intermediate film 5 can be bonded to each of the glass plates 11 and 12. Then, the intermediate film 5 exposed from the outer glass plate 11 and the inner glass plate 12 is cut off.

[0140] <5. The Influence of Sheet Components on the Thickness of Laminated Glass>

[0141] The sheet component 8 has a thickness that is substantially the same as that of the shaded area 51 and the unshaded area 52. However, the inventors of this invention have discovered that, for example, when the thickness of the sheet component 8 is different from that of the shaded area 51 and the unshaded area 52, it will affect the thickness of the laminated glass 10.

[0142] The inventors of this invention discovered, for example, Figure 5 As shown, when the thickness of the sheet component 8 is greater than the thickness of the shaded area 51 and the unshaded area 52, i.e., when a step difference occurs due to the thickness difference, the sheet component 8 forms a protrusion on the surface of the interlayer film 5. However, the outer glass plate 11 does not contact the interlayer film 5 by flattening the protrusion; instead, the outer glass plate 11 bends along the protrusion, resulting in a greater thickness of the laminated glass 10 than other parts. Figure 5 The example illustrates a sheet component 8 protruding towards the outer glass plate 11, but it is also possible for it to protrude towards the inner glass plate 12, or towards both glass plates 11 and 12. In this case, the inner glass plate 12 also bends.

[0143] On the other hand, the inventors of this invention discovered that, as Figure 6 As shown, when the thickness of the sheet component 8 is less than the thickness of the shaded area 51 and the unshaded area 52, a recess is formed at the location corresponding to the sheet component 8, and the outer glass plate 11 is bent along the recess, resulting in a smaller thickness of the laminated glass 10 compared to other parts. Specifically, when a recess is formed on the surface of the inner glass plate 12 side of the interlayer film 5, the inner glass plate 12 is bent.

[0144] Furthermore, as described above, when at least one of the outer glass plate 11 and the inner glass plate 12 is bent, perspective distortion occurs, thereby the image obtained by the imaging device 2 through the opening 43 may be distorted.

[0145] Therefore, the inventors of this invention discovered that, as Figure 7As shown, 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 N, which is 400 mm away from the edge of the sheet member 8 on a virtual line L extending through the center point M in the horizontal direction, is defined as H2, and if the following formula (1) is satisfied, the perspective distortion can be suppressed.

[0146] 0 < |H1 - H2| < 120 μm (1)

[0147] That is, the difference in thickness of the sheet member 8 and the shadow region 51 (or the non-shadow region 52) cannot be directly measured using the manufactured windshield, and therefore the inventors of the present application found that by measuring H1 and H2 as described above, the difference in thickness of the sheet member 8 and the shadow region 51 can be roughly calculated.

[0148] In addition, the inventors of the present application found that in order to reduce the perspective distortion due to the convex portion or the concave portion, it is sufficient to further satisfy the following formula (2).

[0149] 0 < |H1 - H2| < 40 μm (2)

[0150] Similarly, in order to reduce the perspective distortion, the inventors of the present application found that it is sufficient to make the width d of the sheet member 8 in the horizontal direction 150 mm or more.

[0151] d > 150 mm (3)

[0152] <6. Features>

[0153] (1) In the case where the interlayer film 5 is formed with the shadow region 51, by embedding the transparent sheet member 8 in the shadow region 51, it is also possible to form a region through which light of the camera of the photographing device 2 passes. Therefore, it is possible to perform light shielding and anti-glare using the shadow region 51, and the photographing of the photographing device 2 will not be hindered.

[0154] (2) As described above, the inventors of the present application found that due to the difference in thickness of the sheet member 8 and the shadow region 51 (or the non-shadow region 52), the portion of the laminated glass 10 in which the sheet member is provided is curved so as to form a convex portion or a concave portion. And it was found that due to this curvature, the laminated glass is subjected to perspective distortion. In this regard, the inventors of the present application found that if at least one of the above formula (1), and formula (2) and formula (3) is satisfied, the perspective distortion can be reduced.

[0155] <7. Modified Examples>

[0156] The above describes one embodiment of the present application, but the present application is not limited to the above-described embodiment, and various modifications can be made without departing from the gist thereof. The following modified examples can also be appropriately combined.

[0157] <7-1>

[0158] The shape of the shielding layer is not particularly limited and can be of various shapes. That is, at least one opening 43 for shooting needs to be formed, and the shape of the opening is not particularly limited. Therefore, two or more openings can also be formed.

[0159] An opening, for example, can be like Figure 8 The configuration is as shown. As shown in the figure, a plurality of circular dots (shielding pieces) 435 are formed at predetermined intervals and arranged in an alternating pattern along the periphery of the opening 43, forming an opening periphery region 431 (refer to the enlarged view). That is, the opening periphery region 431 is formed of the same material (shielding material) as the shielding layer 4, but the density is lower compared to the arrangement ratio of the same material as the shielding layer 4. The width of the opening periphery region 431, i.e., the distance Z from the periphery of the opening 43, is preferably 4 mm or more, and more preferably 6 mm or more. In addition, the proportion of dots 435 in the opening periphery region 431 is preferably, for example, 20% to 80%. These dots 435 may be formed of a different material than the shielding layer 4.

[0160] The reason for setting such an opening periphery region 431 is as follows. First, because the coefficient of thermal expansion 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 can be seen that when the glass plate is heated together with the shielding layer during glass plate forming, deformation occurs near the boundary between the shielding layer and the area where no shielding layer is formed due to the difference in the amount of expansion. As a result, the problem of image distortion seen through the glass plate occurs.

[0161] Therefore, in this embodiment, as described above, by forming an opening periphery region 431 with a dot pattern, the thermal expansion of this opening periphery region 431 is reduced compared to the shielding layer 4. This prevents a rapid change in the rate of thermal expansion at the boundary between the shielding layer 4 (the edge of the opening) and the interior of the opening. That is, the density of the ceramic transitions slowly from the shielding layer 4 (the edge of the opening) with a high ceramic density, through the opening periphery region 431 with a low ceramic density, to the interior of the opening where no ceramic is formed. This slows down the change in thermal expansion, thereby suppressing deformation of the glass plates 11 and 12 near the boundary of the opening 43. Therefore, deformation of the image obtained by the imaging device 2 can be suppressed.

[0162] exist Figure 8In the example of FIG. 43, the opening peripheral edge region 431 is formed by a staggered dot pattern, but can be rectangular, polygonal, or irregular in shape other than circular, and can be arranged in a staggered pattern or at a prescribed interval, as long as the density of the ceramic is reduced. In addition, the size of the dots 435 can be changed. A linear pattern can also be formed at a prescribed interval. Further, the opening peripheral edge region can be formed by arranging various shapes of masking pieces at a prescribed interval. For example, the size or shape of the dots can be changed, or the shape of the opening peripheral edge can be curved rather than straight.

[0163] In addition, on the outer glass plate 11 and the inner glass plate 12 outside the lamination masking layer 4, a region approximately 4 to 6 mm inward from the inner periphery of the opening peripheral edge region 431 is a deformation region 110 in which deformation is likely to occur (a region inward of the deformation region 110 corresponds to the central region of the present application) depending on the heating process or the annealing process. In the example of FIG. 43, the inner periphery of the deformation region 110 is indicated by a dashed line. Figure 8 Therefore, it is preferable to obtain an image using the imaging device inward of the deformation region 100. When the width of the deformation region 110 is set to be large, the central region for obtaining the captured image becomes narrow, and thus it is preferable to set the width of the deformation region 110 to be within 6 mm.

[0164] <7-2>

[0165] In the above embodiment, the masking layer 4 of the outer glass plate 11 and the inner glass plate 12 is formed in the same shape and at the same position, but is not limited thereto. That is, as long as the imaging device 2 can be imaged through each opening 43 of the two masking layers 4, the shapes of the two can be completely different. In addition, since the laminated glass 10 is installed with an inclination, the positions of the openings 43 can be matched with an inclination, or can be slightly offset. In addition, for example, either the peripheral edge portion 41 or the extension portion 42 can be formed in either of the masking layers.

[0166] <7-3>

[0167] In the above embodiment, the masking layer 4 is formed on both the vehicle interior side surface of the outer glass plate 11 and the vehicle interior side surface of the inner glass plate 12, but can be formed on either. However, for example, when the masking layer 4 is formed on the vehicle exterior side surface of the outer glass plate 11, there is a possibility that the air described above is recognized from the vehicle interior.

[0168] <7-4>

[0169] The shape of the sheet member 8 is not particularly limited, and can be formed to be at least larger than the opening 43. In addition, the position at which the sheet member 8 is arranged is not particularly limited, and can be a position at which at least a portion overlaps the shadow region 51.

[0170] <7-5>

[0171] Also, a plurality of openings 43 of the shielding layer 4 can be formed. For example Figure 9 As shown, a plurality of openings 43 can be formed in the extension 42 of the shielding layer 4, through holes 50 are formed in the interlayer film 5 in a manner corresponding to each of the openings 43, and the sheet member 8 can be inserted into each of the through holes 50. In this case, a plurality of cameras, sensors, and the like are arranged in a manner corresponding to each of the openings 43.

[0172] In addition, as Figure 10 shown, all of the plurality of openings 43 can be arranged inside the sheet member 8. In this case, the opening 43 arranged near the outer edge of the sheet member 8 can satisfy each of the above-described aspects. Among them, as a specific numerical value, the sheet member 8 is preferably, for example, larger than a square of 100 mm on one side and smaller than a square of 300 mm on one side, and can be increased to a size of 400 mm in width x 300 mm in height, for example.

[0173] <7-6>

[0174] In the above-described embodiment, a photographing device is used as the information obtaining device of the present application, but is not limited thereto, and various information obtaining devices can be used. That is, in order to obtain information from the outside of the vehicle, any device that performs light irradiation and / or light reception can be used without particular limitation. For example, various devices such as a sensor that measures a distance between vehicles, a visible light and / or infrared camera for measuring a distance between vehicles, a light beacon, and the like that receives a signal from the outside of the vehicle, and a camera that uses visible light and / or infrared light to read a road white line, and the like can be applied. In addition, the number of openings of the shielding layer 4 can be appropriately changed depending on the type of the information obtaining device. For example, light irradiation and light reception can be performed through dedicated openings, respectively. Among them, the information obtaining device can or can not be in contact with the glass sheet. In either case, in the glass sheet, an electrothermal wire is formed in a region through which light of the information obtaining device passes (an information obtaining region).

[0175] <7-7>

[0176] In the present application, the laminated glass can be configured as described below in correspondence with the information obtaining device.

[0177] 1. In the case of using a camera system that operates in a visible range, the light transmittance of the A light source of the laminated glass can be less than 70%. In this case, the following laminated glass is used. Among them, the A light source is one of A, B, and C, which are three types of standard light sources defined in an agreement of the International Commission on Illumination (CIE), and the A light source is a general aeration tungsten incandescent lamp having a color temperature of 2854 K.

[0178] (i) The interlayer (e.g. PVB) can be tinted darker (e.g. the outer and inner glass sheets 11, 12 can be clear glass).

[0179] (ii) The Fe203content of each glass sheet 11, 12 as clear glass can be, for example, 0.01 to 0.2 wt%. Alternatively, it can be a combination of tinted glass with a Fe203content of 0.5 wt to 1 wt%, or a combination of tinted glass with a Fe203content of 0.5 to 1.5 wt% and clear glass with a Fe203content of typically 0.01 to 0.2 wt%.

[0180] (iii) The thickness of the laminated glass is 3 to 9 mm (the thickness of each glass sheet 11, 12 can be 0.7 to 4 mm).

[0181] (iv) A sheet member 8 larger than the opening 43 is used.

[0182] (v) The laminated glass can be used for a front windshield, or a rear window on the rear side.

[0183] 2. In the case of using a LiDAR system, the light transmittance of the A light source of the laminated glass can be less than 70%. In the case where the light transmittance of the A light source of the laminated glass is less than 70%, the following laminated glass is used.

[0184] (i) The interlayer (e.g. PVB) is tinted darker (the outer and inner glass sheets 11, 12 are preferably ultra-clear glass).

[0185] (ii) The Fe203content of each glass sheet 11, 12 as ultra-clear glass is, for example, less than 0.1 wt%, preferably less than 0.05 wt%.

[0186] (iii) The thickness of the laminated glass is 3 to 9 mm (the thickness of each glass sheet 11, 12 can be 0.7 to 4 mm).

[0187] (iv) A sheet member 8 larger than the opening 43 is used.

[0188] (v) The laminated glass can be used for a front windshield, or a rear window on the rear side.

[0189] 3. In the case of using a LiDAR system, the light transmittance of the A light source of the laminated glass can exceed 70%. In the case where the light transmittance of the A light source of the laminated glass exceeds 70%, the following laminated glass is used.

[0190] (i) The interlayer (e.g. PVB) provides solar control properties by absorption (Tts can be, for example, less than 65%, preferably less than 60%, further preferably less than 55%).

[0191] (ii) The outer glass plate 11 and the inner glass plate 12 can be super transparent glass (the content of Fe2O3is, for example, less than 0.1 wt%, preferably less than 0.05 wt%).

[0192] (iii) The thickness of the laminated glass is 3 to 9 mm (the thickness of each glass plate 11, 12 can be 0.7 to 4 mm).

[0193] (iv) A sheet member 8 larger than the opening 43 is used.

[0194] (v) The laminated glass can be used for a front windshield, or a rear window glass on the rear side.

[0195] Tts is calculated from the transmittance / reflectance at a wavelength of 300 nm to 2500 nm measured in accordance with ISO 13837 using a spectrophotometer ("U-4100" manufactured by Hitachi High-Technologies Corporation). From the viewpoint of further improving the heat insulating property, Tts is preferably 70% or less, more preferably 65% or less, and further preferably 60% or less.

[0196] <7-8>

[0197] In the above embodiment, the laminated glass of the present application is used as a windshield, but can be used for a rear window glass, a side window glass, and the like, in addition to this. Alternatively, it can be used for a vehicle other than an automobile (a train, and the like).

[0198] Example

[0199] Hereinafter, examples of the present application will be described. However, the present application is not limited to the following examples.

[0200] The following laminated glass was prepared.

[0201] • An outer glass plate and an inner glass plate formed of a float glass having a length of 300 mm, a width of 305 mm, and a thickness of 2.0 mm;

[0202] • An interlayer film having a thickness of 0.76 mm and being made of polyvinyl butyral resin (PVB).

[0203] The laminated glass was produced by sandwiching the above interlayer film between the outer glass plate and the inner glass plate and pressure bonding. In the interlayer film, a through hole in the shape of a rectangle was formed near the center thereof, and a sheet member of the same size and the same material was inserted into the through hole. Hereinafter, the size of the sheet member involved in Examples 1 to 9 will be shown. The length of the sheet member was 105 mm in all of the examples.

[0204] [Table 2]

[0205]

[0206] In Table 2 described above, in a case where the thickness difference k of the sheet member and the other portion of the interlayer film shows a positive value, the sheet member forms a convex portion, and in a case where it shows a negative value, it forms a concave portion. In addition, the thickness difference H of the laminated glass is the difference between the largest portion and the smallest portion of the thickness of the laminated glass due to the convex portion or the concave portion. Specifically, as shown in Figures 11A to 11I , it is the difference between the thickness of the portion of the laminated glass corresponding to the center of the sheet member and the thickness of the end edge of the laminated glass.

[0207] In the laminated glasses of Examples 1 to 9 formed as described above, the dimension of the cross section passing through the center in the up-down direction of the sheet member was measured. Figures 11A to 11I The graphs of FIGS. 1 to 9 respectively show the cross sections of the laminated glasses relating to Examples 1 to 9. In each of the graphs, the points A to E indicate the positions corresponding to the points A to E shown in Figure 5 or Figure 6 . In addition, the curves in each of the graphs indicate the thickness of the laminated glass (the profile of the outer glass plate).

[0208] The horizontal axis of each of the graphs indicates the dimension in the horizontal direction. For example, in Figure 11A , the distance between the points A and E corresponds to the width of the sheet member in the horizontal direction, and is about 170 mm. In addition, the vertical axis on the left side indicates the dimension of the thickness of the interlayer film. For example, in Figure 11A , the distance between the points A and B indicates the thickness difference of the sheet member and the other portion, and is about 70 μm. This value corresponds to the difference k. On the other hand, the vertical axis on the right side indicates the thickness of the laminated glass. In addition, in order to easily compare, the curve indicating the thickness of the laminated glass is such that the maximum value or the minimum value coincides with 0 of the horizontal axis on the left side.

[0209] where H1 in the above-described formula (1) corresponds to the thickness of the portion indicating the maximum value or the minimum value of the curve of each of the graphs. On the other hand, in Examples 1 to 9, since the lateral width is 305 mm, there is no portion corresponding to H2 described above, but the inventors of the present application confirmed that the value of H of each of the graphs and |H1-H2| are approximately coincident by conducting research using a large glass plate.

[0210] In addition, in Table 2, the thickness difference k of the sheet member and the other portion of the interlayer film and the thickness difference H of the laminated glass are approximately coincident. Therefore, it is known that the step difference of the sheet member is the cause of the thickness difference of the laminated glass. In addition, in this test, since the cross section of the laminated glass was analyzed in detail, the above-described difference k could be calculated, but it is not easy to measure in general. Therefore, the thickness H of the laminated glass was measured, but as described above, the difference k and the difference H are approximately coincident, so that the difference k can be approximately calculated as long as the difference H is measured. In addition, since the difference H and |H1-H2| are approximately coincident, actually, |H1-H2| can be calculated as it is.

[0211] Next, in Examples 1 to 9, the perspective distortion of the portion provided with the sheet member was measured, and the following results were obtained. The perspective distortion was measured based on the test of the perspective distortion of JIS R3212.

[0212] [Table 3]

[0213] Perspective deformation result Example 1 1 Example 2 2 Example 3 2 Example 4 1 Example 5 1 Example 6 1 Example 7 1 Example 8 2 Example 9 2

[0214] In Table 3, "1" indicates that the perspective distortion is hardly seen, and "2" indicates that although the perspective distortion occurs, it is at a level that is not a problem in practice. From this result, it was known that when the thickness difference between the sheet member and the other portion is within 40 μm (|H1-H2| is less than 40 μm), or the width of the sheet member in the horizontal direction is 150 mm or more, the perspective distortion is hardly seen. It was also known that even when the evaluation is "1", it is not a problem in practice, and thus when H (|H1-H2|) is less than 120 μm, it is not a problem in practice from the perspective of the perspective distortion.

[0215] Explanation of Symbols

[0216] 10: laminated glass; 11: outer glass plate; 12: inner glass plate; 2: photographing device (information obtaining device); 4: shading layer; 43: opening (information obtaining region); 5: interlayer film; 51: shaded region; 52: non-shaded region; 8: sheet member.

Claims

1. A laminated glass capable of configuring an information obtaining device that obtains information from the outside of a vehicle by performing irradiation and / or reception of light, characterized by comprising: an outer glass plate; an inner glass plate; a shield layer having an opening for light for obtaining the information; and an interlayer film configured between the outer glass plate and the inner glass plate, the interlayer film having: a shaded region colored; a non-shaded region that is transparent; and a transparent sheet member embedded in a through-hole formed across the shaded region and the non-shaded region, the information obtaining device being configured opposite the sheet member, a boundary of the through-hole being covered by the shield layer by the opening being configured inside the sheet member, a thickness of the laminated glass at a center point of the sheet member being set as Hl, and a thickness of the laminated glass at a distance of 400 mm from a rim of the sheet member on a virtual line that passes through the center point and extends in a horizontal direction being set as H2, the following formula (1) being satisfied, 0 < |Hl - H2| < 120 μm (1) the center point of the sheet member being inside the opening.

2. The laminated glass according to claim 1, characterized in that: the following formula (2) is satisfied, 0 < |Hl - H2| < 40 μm (2).

3. The laminated glass according to claim 1 or 2, characterized in that: a length in a left-right direction of the sheet member is 150 mm or more.

4. The laminated glass according to claim 3, characterized in that: a thermal expansion rate of a shield material forming the shield layer and the glass plates are different, the glass plates and the shield layer are formed by being heated together, an opening rim region in which a proportion of the shield material per unit area is small is formed in at least a part of an area along an inner periphery of the opening of the shield layer, and the light is configured to pass through an area further inside than the opening rim region.

5. The laminated glass according to claim 4, characterized in that: the opening rim region is formed throughout the entire periphery of the inner periphery of the opening.

6. The laminated glass according to claim 4, characterized in that: an inside of the opening rim region of the laminated glass is composed of a deformation region along the inner periphery of the opening rim region and a central region adjacent to an inside of the deformation region, and the light is configured to pass through all or a part of the central region.

7. The laminated glass according to claim 6, characterized in that: a width of the deformation region is 6 mm or less.

8. The laminated glass according to claim 4, characterized in that: the opening rim region has a plurality of shield pieces formed of the shield material, and the plurality of shield pieces are configured spaced apart from each other.

9. The laminated glass according to claim 8, characterized in that: each of the shield pieces is formed in a circular shape.

10. The laminated glass according to claim 8, characterized in that: the shield pieces are configured in a staggered manner.

11. The laminated glass according to claim 4, characterized in that: at least a part of the shield layer is black. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 12. The laminated glass according to claim 4, wherein: An electromagnetic wave shielding film is formed in at least a portion of the region in which the information obtaining device is installed, in the shielding layer, the opening peripheral edge region, and the deformed region.

13. The laminated glass according to claim 12, wherein: At least a portion of the shielding layer, the opening peripheral edge region, and the deformed region is configured by sequentially arranging a first view shielding film, the electromagnetic wave shielding film, and a second view shielding film from the vehicle exterior side to the vehicle interior side.

14. The laminated glass according to claim 1 or 2, wherein: The sheet member is larger than a square of 100 mm on a side and smaller than a square of 300 mm on a side.

15. The laminated glass according to claim 1 or 2, wherein: Two to four of the through holes are formed, and the sheet member is inserted into each of the through holes.

16. The laminated glass according to claim 1 or 2, wherein: A cross section in the up-down direction is wedge-shaped.

17. The laminated glass according to claim 1 or 2, wherein: The thickness of the outer glass plate is smaller than the thickness of the inner glass plate.

18. The laminated glass according to claim 1 or 2, wherein: It is used as a windshield.

19. The laminated glass according to claim 1 or 2, wherein: It is used as a rear window glass.

Images