WO2023042785A1 - Pare-brise - Google Patents

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Publication number
WO2023042785A1
WO2023042785A1 PCT/JP2022/034035 JP2022034035W WO2023042785A1 WO 2023042785 A1 WO2023042785 A1 WO 2023042785A1 JP 2022034035 W JP2022034035 W JP 2022034035W WO 2023042785 A1 WO2023042785 A1 WO 2023042785A1
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WIPO (PCT)
Prior art keywords
glass plate
heat generating
generating layer
windshield
layer
Prior art date
Application number
PCT/JP2022/034035
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English (en)
Japanese (ja)
Inventor
和喜 千葉
尚志 朝岡
Original Assignee
日本板硝子株式会社
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Filing date
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Application filed by 日本板硝子株式会社 filed Critical 日本板硝子株式会社
Publication of WO2023042785A1 publication Critical patent/WO2023042785A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor

Definitions

  • the present invention relates to windshields.
  • a brake activated safety system has been proposed. Such systems measure the distance to the vehicle in front using a laser radar or camera.
  • a laser radar and a camera are generally placed inside a windshield, and perform measurement by irradiating light such as infrared light forward (for example, Patent Document 1).
  • measuring devices such as laser radars and cameras are placed on the inner surface side of the glass plate that makes up the windshield, and irradiate and receive light through the glass plate.
  • the glass plate may fog up or freeze.
  • the glass plate becomes cloudy, there is a risk that light cannot be emitted or received accurately from the measurement device. As a result, the inter-vehicle distance may not be calculated accurately.
  • Such problems are not limited to inter-vehicle distance measurement devices, but can occur in general information acquisition devices that acquire information from outside the vehicle by receiving light, such as rain sensors, light sensors, and optical beacons.
  • An object of the present invention is to provide a windshield capable of generating heat so that information can be obtained accurately by an information obtaining device.
  • Section 2. further comprising a shielding layer laminated on at least one of the outer glass plate and the inner glass plate and having an opening formed at a position corresponding to the information acquisition area; Item 2.
  • Item 3. The windshield according to Item 2, wherein the distance between the edge of the opening and the bus bar is 8 mm or more in the first direction.
  • Section 4. The windshield according to any one of Items 1 to 3, wherein t/W is 0.01 or less, where t (mm) and W (mm) are the thickness and width of each bus bar.
  • Item 5. The windshield according to any one of Items 1 to 4, wherein the heat generating layer has a thickness of 310 ⁇ m or less.
  • Item 6 The windshield according to any one of items 1 to 5, wherein the heat generating layer is arranged outside the test area A defined by JIS R3212.
  • Item 7. The windshield according to any one of Items 1 to 6, wherein the intermediate film further includes a functional film surrounding the heat generating layer.
  • Item 8 The windshield according to Item 7, wherein the difference in thickness between the functional film and the heat generating layer is 310 ⁇ m or less.
  • Item 9. A windshield according to Item 7 or 8, wherein the functional film is an optical film.
  • Item 10 The windshield according to any one of Items 1 to 9, wherein the heat generating layer is formed of a transparent conductive film.
  • Item 11 The windshield according to any one of Items 1 to 9, wherein the heat generating layer includes a base sheet and a plurality of heating wires connecting the bus bars.
  • the windshield of the present invention it is possible to generate heat so that the information acquisition device can acquire information accurately.
  • FIG. 2 is a cross-sectional view showing a state in which the windshield of FIG. 1 is attached to a vehicle; 2 is an enlarged plan view of the vicinity of a photographing window of the windshield of FIG. 1; FIG. 4 is a cross-sectional view taken along line AA of FIG. 3;
  • FIG. 1 is a block diagram of an in-vehicle system;
  • FIG. 10 is a diagram showing deformation of the glass plate when the distance between the busbars is wide;
  • FIG. 10 is a diagram showing deformation of the glass plate when the interval between busbars is narrow;
  • FIG. 11 is an enlarged plan view showing another example of the vicinity of the photographing window of the windshield of FIG. 1;
  • FIG. 4 is a plan view showing another example of the windshield according to the present invention
  • FIG. 10 is a cross-sectional view of the windshield of FIG. 9 near a photographing window
  • FIG. 4 is a plan view showing another example of bus bars and wiring
  • FIG. 4 is a plan view showing another example of bus bars and wiring
  • FIG. 2 is a plan view of Examples 1 to 4
  • FIG. 5 is a plan view of Comparative Examples 1 to 3
  • 4 is a diagram showing deformation of the glass plates of Example 1 and Comparative Example 1.
  • FIG. FIG. 4 is a diagram showing deformation of the glass plates of Examples 1 and 2; It is a side view which shows the measuring method of perspective distortion. 4 is a plan view showing a target;
  • FIG. 10 is a cross-sectional view of the windshield of FIG. 9 near a photographing window
  • FIG. 4 is a plan view showing another example of bus bars and wiring
  • FIG. 2 is a plan view of Examples 1 to 4
  • FIG. 5 is a plan view
  • FIG. 5 is a graph showing the relationship between the thickness of a heat generating layer and perspective distortion.
  • 10 is a graph showing the relationship between the thickness of the heat generating layer and perspective distortion in Examples 3 and 4.
  • FIG. 10 is a graph showing the distance between the imaging window and the busbar when perspective distortion of 400 mdpt occurs in Examples 3 and 4.
  • FIG. 10 is a graph showing the distance between the imaging window and the busbar when perspective distortion of 400 mdpt occurs in Examples 3 and 4.
  • FIG. 1 is a plan view of the windshield
  • FIG. 2 is a sectional view showing the windshield of FIG. 1 attached to a vehicle.
  • the vertical direction in FIG. 1 will be referred to as “vertical”, “vertical”, and “longitudinal”, and the horizontal direction in FIG. 1 will be referred to as "left and right”.
  • FIG. 1 illustrates the windshield viewed from the inside of the vehicle. That is, the far side of the paper surface of FIG. 1 is the outside of the vehicle, and the front side of the paper surface of FIG. 1 is the inside of the vehicle.
  • the windshield 1 includes a substantially rectangular laminated glass 10 and is installed on the vehicle body in an inclined state.
  • the windshield 1 also comprises an outer glass plate 11, an inner glass plate 12, and an intermediate film 13 arranged between the glass plates 11,12.
  • a mask layer 110 is laminated on each of the vehicle-interior surfaces of the outer glass plate 11 and the inner glass plate 12 .
  • a photographing device 2 having a built-in camera for photographing the situation outside the vehicle is attached to the mask layer 110 via a bracket (not shown).
  • a photographing window 113 is provided in the mask layer 110 at a position corresponding to the photographing device 2 , and the photographing device 2 can photograph the situation outside the vehicle through the photographing window 113 .
  • An image processing device 3 is connected to the photographing device 2 , and the photographed image acquired by the photographing device 2 is processed by this image processing device 3 .
  • the photographing device 2 and the image processing device 3 constitute an in-vehicle system 5 (see FIG. 5), and the in-vehicle system 5 can provide various information to passengers according to the processing of the image processing device 3. .
  • the outer glass plate 11 and the inner glass plate 12 can be made of known glass plates, and can be made of heat-absorbing glass, general clear glass, green glass, or UV green glass. However, these glass plates 11 and 12 must achieve visible light transmittance that meets the safety standards of the countries where automobiles are used. For example, the outer glass plate 11 can ensure a necessary solar absorptivity, and the inner glass plate 12 can be adjusted so that the visible light transmittance satisfies safety standards. Examples of clear glass, heat-absorbing glass, and soda-lime-based glass are shown below.
  • the composition of the heat-absorbing glass is, for example, based on the composition of the clear glass, the ratio of total iron oxide (T-Fe 2 O 3 ) converted to Fe 2 O 3 is 0.4 to 1.3% by mass, and CeO 2 is 0 to 2% by mass, the ratio of TiO 2 is 0 to 0.5% by mass, and the framework components of the glass (mainly SiO 2 and Al 2 O 3 ) are T—Fe 2 O 3 and CeO. 2 and TiO 2 increments.
  • the thickness of the laminated glass 10 according to the present embodiment is not particularly limited, but from the viewpoint of weight reduction, the total thickness of the outer glass plate 11 and the inner glass plate 12 may be 2.4 to 5.0 mm. It is preferably 2.6 to 3.4 mm, particularly preferably 2.7 to 3.2 mm. Thus, 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.
  • the thickness of the outer glass plate 11 and the inner glass plate 12 can be determined as follows.
  • the outer glass plate 11 is mainly required to have durability and impact resistance against obstacles from the outside. is necessary. On the other hand, the larger the thickness, the greater the weight, which is not preferable. From this point of view, the thickness of the outer glass plate 11 is preferably 1.0 to 3.0 mm, more preferably 1.6 to 2.3 mm. Which thickness to use can be determined according to the use of the glass.
  • the thickness of the inner glass plate 12 can be made equal to that of the outer glass plate 11, but for example, the thickness can be made smaller than that of the outer glass plate 11 in order to reduce the weight of the laminated glass 10. Specifically, considering the strength of the glass, it is preferably 0.6 to 2.0 mm, more preferably 0.8 to 1.8 mm, and more preferably 0.8 to 1.6 mm. Especially preferred. Further, it is preferably 0.8 to 1.3 mm. Which thickness to use for the inner glass plate 12 can also be determined according to the use of the glass.
  • the shapes of the outer glass plate 11 and the inner glass plate 12 according to this embodiment may be curved. However, when the glass plates 11 and 12 are curved, the sound insulation performance is degraded as the amount of overlap increases.
  • the amount of doubling is an amount that indicates the amount of bending of the glass plate. It is defined as the amount of doubling D.
  • the curved glass plate does not have a large difference in sound transmission loss (STL) when the double amount D is in the range of 30 to 38 mm, but compared to the flat glass plate, the frequency of 4000 Hz or less It can be seen that the sound transmission loss is reduced in the band. Therefore, when producing a curved glass plate, the overlap amount D is preferably as small as possible. Specifically, the overlap amount D is preferably less than 30 mm, more preferably less than 25 mm, and particularly preferably less than 20 mm.
  • the measurement positions are two points above and below a center line extending vertically from the center of the glass plate in the horizontal direction.
  • the measuring instrument is not particularly limited, for example, a thickness gauge such as SM-112 manufactured by Teclock Co., Ltd. can be used.
  • the curved surface of the glass plate is placed on a flat surface, and the edge of the glass plate is held between the thickness gauges.
  • a mask layer 110 made of dark-colored ceramic such as black is laminated on the periphery of the windshield 1 .
  • This mask layer 110 shields the field of view from inside or outside the vehicle, and is laminated along the outer edge of the windshield 1.
  • the peripheral edge portion 111 corresponds to the upper side of the windshield 1. and a protrusion 112 extending downward from near the center of the portion.
  • a rectangular photographing window 113 is formed in the projecting portion 112 .
  • the photographing window 113 is a portion where the mask layer 110 is not formed, and is a portion through which the inside and outside of the windshield 1 are transmitted.
  • the photographing device 2 described above is arranged inside the vehicle and acquires information from outside the vehicle through the photographing window 113 .
  • the mask layer 110 can be made of various materials such as ceramics, and can have, for example, the following composition. *1, Main ingredients: copper oxide, chromium oxide, iron oxide and manganese oxide *2, Main ingredients: bismuth borosilicate, zinc borosilicate
  • the ceramic can be formed by the screen printing method, but in addition to this, it is also possible to make it by transferring the transfer film for firing to a glass plate and firing it.
  • screen printing for example, polyester screen: 355 mesh, coat thickness: 20 ⁇ m, tension: 20 Nm, squeegee hardness: 80 degrees, mounting angle: 75 degrees, printing speed: 300 mm / s.
  • a ceramic can be formed by drying at 150° C. for 10 minutes.
  • the mask layer 110 can also be formed by laminating ceramics or by attaching a dark-colored resin shielding film.
  • FIG. 3 is an enlarged plan view of the vicinity of the photographing window in the windshield of FIG. 1, and FIG. 4 is a sectional view taken along the line AA of FIG.
  • the intermediate film 13 includes a transparent first adhesive layer 131 adhered to the outer glass plate 11, a transparent second adhesive layer 132 adhered to the inner glass plate 12, and a transparent adhesive layer 132 adhered to the inner glass plate 12. and a heat-generating layer 133 arranged between both adhesive layers 131 and 132 .
  • the first adhesive layer 131 and the second adhesive layer 132 are not particularly limited as long as they are adhered to the respective glass plates 11 and 12 by fusion bonding, but examples include polyvinyl butyral resin (PVB) and ethylene vinyl acetate resin. (EVA) or the like.
  • PVB polyvinyl butyral resin
  • EVA ethylene vinyl acetate resin
  • the hardness of a polyvinyl acetal resin is controlled by (a) the degree of polymerization of polyvinyl alcohol as a starting material, (b) the degree of acetalization, (c) the type of plasticizer, and (d) the addition ratio of the plasticizer. can be done.
  • the thickness of the first adhesive layer 131 and the second adhesive layer 132 is not particularly limited, it is preferably 0.05 to 2.0 mm, more preferably 0.1 to 1.0 mm. However, the thicknesses of both adhesive layers 131 and 132 may be the same or different.
  • the total thickness of both adhesive layers 131 and 132 is preferably 0.6 mm or more. This is to ensure penetration resistance performance, etc., as specified in JIS R3211 and R3212, for example, in the windshield.
  • the heat generation layer 133 is formed of a transparent conductive film arranged at a position corresponding to the photographing window 113 . More specifically, the heat generating layer 133 is formed slightly larger than the photographing window 113 and arranged so as to cover the photographing window 113 .
  • the heat generation layer 133 is formed in a rectangular shape whose length in the horizontal direction is shorter than in the vertical direction, and bus bars 134 are laminated on both the left and right ends thereof with an adhesive such as solder. Each bus bar 134 is for supplying power to the heat generating layer 133 and extends upward on both sides of the heat generating layer 133 .
  • a wiring 139 is connected to the upper end of each bus bar 134 , and the upper end of each wiring 139 protrudes from the upper sides of the glass plates 11 and 12 .
  • a positive electrode and a negative electrode of a power source (not shown) are connected to each wiring 139 .
  • each bus bar 134 is laminated on both the left and right ends of the heat generation layer 133 , it is hidden by the mask layer 110 and cannot be seen from the photographing window 113 .
  • the transparent conductive film forming heat generating layer 133 is configured to generate heat when a voltage is applied by both bus bars 134 .
  • Such transparent conductive films include, for example, ITO, SnO2 doped with Sb and F, zinc oxide doped with Al and Ga, TiO2 doped with Nb, TCO (Transparent Conductive Oxide) such as tungsten oxide, and the like. and a metal film are laminated on a base film.
  • the resistance of the TCO can be, for example, 3 to 160 ⁇ / ⁇ . This is because if the resistance exceeds 160 ⁇ / ⁇ , heat generation will be insufficient, and the anti-fogging or de-icing performance will be insufficient.
  • the base film is formed of a transparent resin film, and can be formed of, for example, polyethylene terephthalate, polyvinyl chloride, polyvinylidene chloride, polycarbonate, or acrylic resin.
  • the thickness of the heating layer 133 is, for example, preferably 38-310 ⁇ m, more preferably 50-125 ⁇ m. This is because if the thickness of the heat generating layer 133 is too small, handling becomes difficult, while if the thickness of the heat generating layer 133 is too large, perspective distortion increases. Moreover, if the heat generation layer 133 is too thick, a step may occur, and the glass plates 11 and 12 may be easily deformed.
  • the bus bar 134 is not particularly limited as long as it is made of a conductive material, but examples include copper, silver, gold, and platinum.
  • the width and thickness of the bus bar 134 are not particularly limited, for example, the width of the bus bar 134 is preferably 3 to 12 mm, and the thickness of the bus bar is preferably 10 to 100 ⁇ m. Further, when the width and thickness of bus bar 134 are W (mm) and t (mm), respectively, t/W is preferably 0.01 or less.
  • the distance s (see FIG. 4) between the bus bar 134 and the photographing window 113 is preferably 8 mm or more, more preferably 15 mm or more. This is because the glass plates 11 and 12 are likely to be deformed due to the step caused by the bus bar 134, so it is preferable that the bus bar 134 and the photographing window 113 are separated as much as possible.
  • FIG. 5 illustrates the configuration of the in-vehicle system 5.
  • an in-vehicle system 5 includes the photographing device 2 and an image processing device 3 connected to the photographing device 2 .
  • the image processing device 3 is a device that processes the captured image acquired by the imaging device 2 .
  • the image processing apparatus 3 has, for example, general hardware such as a storage unit 31, a control unit 32, an input/output unit 33, etc., which are connected via a bus as a hardware configuration.
  • general hardware such as a storage unit 31, a control unit 32, an input/output unit 33, etc.
  • the hardware configuration of the image processing device 3 may not be limited to such an example, and regarding the specific hardware configuration of the image processing device 3, addition or omission of components may be made as appropriate according to the embodiment. and can be added.
  • the storage unit 31 stores various data and programs used in the processing executed by the control unit 32 (not shown).
  • the storage unit 31 may be realized by, for example, a hard disk, or may be realized by a recording medium such as a USB memory. Further, the various data and programs stored in the storage unit 31 may be acquired from a recording medium such as a CD (Compact Disc) or a DVD (Digital Versatile Disc). Furthermore, the storage unit 31 may be called an auxiliary storage device.
  • the laminated glass 10 is arranged in an inclined posture with respect to the vertical direction and is curved. Then, the photographing device 2 photographs the situation outside the vehicle through such laminated glass 10 . Therefore, the photographed image acquired by the photographing device 2 is deformed according to the orientation, shape, refractive index, optical defects, and the like of the laminated glass 10 . In addition, an aberration specific to the camera lens of the photographing device 2 is also added. Therefore, the storage unit 31 may store correction data for correcting an image deformed by such aberrations of the laminated glass 10 and the camera lens.
  • the control unit 32 includes one or more processors such as a microprocessor or a CPU (Central Processing Unit), and peripheral circuits used for the processing of this processor (ROM (Read Only Memory), RAM (Random Access Memory), an interface circuit etc.). ROM, RAM, etc. may be called a main storage device in the sense that they are arranged in an address space handled by the processor within the control unit 32 .
  • the control unit 32 functions as an image processing unit 321 by executing various data and programs stored in the storage unit 31 .
  • the image processing unit 321 processes captured images acquired by the imaging device 2 .
  • the processing of the captured image can be appropriately selected according to the embodiment.
  • the image processing unit 321 may recognize the subject appearing in the captured image by analyzing the captured image by pattern matching or the like.
  • the image processing unit 321 since the photographing device 2 photographs the situation in front of the vehicle, the image processing unit 321 further determines whether or not a creature such as a human being is photographed in front of the vehicle based on the subject recognition. good too. Then, when a person appears in front of the vehicle, the image processing section 321 may output a warning message by a predetermined method. Further, for example, the image processing unit 321 may apply predetermined processing to the captured image. Then, the image processing unit 321 may output the processed captured image to a display device (not shown) such as a display connected to the image processing device 3 .
  • the input/output unit 33 is one or more interfaces for transmitting/receiving data to/from devices 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 USB (Universal Serial Bus).
  • the image processing device 3 is connected to the imaging device 2 via the input/output unit 33 and acquires an image captured by the imaging device 2 .
  • Such an image processing apparatus 3 may 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.
  • PC Personal Computer
  • tablet terminal or the like
  • the photographing device 2 is attached to a bracket (not shown), and this bracket is attached to the mask layer 110 . Therefore, in this state, the attachment of the imaging device 2 to the bracket and the attachment of the bracket to the mask layer are adjusted so that the optical axis of the camera of the imaging device 2 passes through the imaging window 113 .
  • a cover (not shown) is attached to the bracket so as to cover the imaging device 2 . Therefore, the photographing device 2 is arranged in a space surrounded by the laminated glass 10, the bracket, and the cover, so that it cannot be seen from the inside of the vehicle, and only a part of the photographing device 2 can be seen from the outside of the vehicle through the photographing window 113. It's not supposed to.
  • the photographing device 2 and the input/output unit 33 are connected by a cable (not shown). This cable is pulled out from the cover and connected to the image processing device 3 arranged at a predetermined position inside the vehicle. .
  • Windshield manufacturing method> Next, an example of a method for manufacturing the windshield configured as described above will be described. First, a method for manufacturing the laminated glass 10 will be described.
  • the mask layer 110 described above is laminated on at least one of the flat plate-shaped outer glass plate 11 and inner glass plate 12 .
  • these glass plates 11 and 12 are molded so as to be curved.
  • a molding method is not particularly limited, and a known method can be adopted. For example, after a flat glass plate passes through a heating furnace, it can be molded into a curved shape by pressing with an upper mold and a lower mold. Alternatively, a flat outer glass plate and an inner glass plate are overlapped, placed on a frame mold, and passed through a heating furnace. As a result, both glass sheets are softened and formed into a curved shape by their own weight.
  • the above-described intermediate film 13 is sandwiched between the outer glass plate 11 and the inner glass plate 12, and then wrapped in a rubber bag. and pre-adhered at about 70 to 110° C. while vacuuming.
  • the intermediate film 13 sandwiches the heat generating layer 133, the bus bar 134 and the wiring 139 between the adhesive layers 131 and 132 described above.
  • Other pre-bonding methods are possible.
  • the intermediate film 13 is sandwiched between the outer glass plate 11 and the inner glass plate 12 and heated at 45 to 65° C. in an oven. Subsequently, this laminated glass is pressed with rolls at 0.45 to 0.55 MPa. Next, this laminated glass is heated again in an oven at 80 to 105° C., and then pressed again with a roll at 0.45 to 0.55 MPa.
  • pre-bonding is completed.
  • the pre-bonded laminated glass is subjected to main bonding by an autoclave, for example, at 8 to 15 atmospheres and 100 to 150°C.
  • the main adhesion can be performed under the conditions of 14 atmospheric pressure and 145°C.
  • the laminated glass 10 according to this embodiment is manufactured.
  • the heat generation layer 133 is formed in a rectangular shape in which the length in the left-right direction (first direction) is shorter than the length in the up-down direction (second direction). are arranged at the upper and lower ends of the heat generating layer 133, the distance between the two bus bars 134 is shorter. Therefore, the following effects can be obtained.
  • the portion of the outer glass plate 11 between the bus bars 134 can be flexed toward the heat generating layer 133 by a small amount.
  • an appropriate image can be generated by the image processing described above. Therefore, in the present embodiment, the heat generation layer 133 whose length in the horizontal direction is shorter than that in the vertical direction is used, and the bus bars 134 are arranged at both ends of the heat generation layer 133 in the horizontal direction. can be made smaller.
  • the inner glass plate 12 is also deformed in the same manner as the outer glass plate 11, but the explanation is omitted here.
  • the heat generation layer 133 is formed of a transparent conductive film in the above embodiment, the configuration of the heat generation layer is not limited to this.
  • a pair of bus bars 134 are arranged at both ends of a base sheet 135 having the same shape as the heat generating layer 133 described above.
  • a plurality of heating wires 136 are arranged in parallel on the base sheet 135 so as to connect both bus bars 134 .
  • the base sheet 135 can be made of, for example, polyethylene terephthalate, polyvinyl chloride, polyvinylidene chloride, polycarbonate, or acrylic resin.
  • the outer diameter of the heating wire 136 is preferably smaller than the thickness of the bus bar 134, for example 5 to 30 ⁇ m.
  • a functional film 137 can also be arranged inside the intermediate film 13 so as to surround the heat generating layer 133 .
  • a functional film 137 By arranging such a functional film 137 , it is possible to reduce a step occurring around the heat generating layer 133 inside the intermediate film 13 . Thereby, the deformation of the glass plates 11 and 12 can be suppressed, and the occurrence of perspective distortion can be suppressed.
  • the functional film is not particularly limited, for example, optical films such as reflective films for head-up displays and heat reflective films can be used.
  • the thickness of the functional film 137 is preferably the same as that of the heat-generating layer 133.
  • the difference in thickness between the heat-generating layer 133 and the functional film 137 is preferably 310 ⁇ m or less.
  • a gap may be provided between the functional film 137 and the heat generating layer 133, or at least a part of both 137 and 133 may be in contact with each other.
  • the mask layer 110 can take various forms such as only the inner surface of the outer glass plate 11 or only the inner surface of the inner glass plate 12, for example.
  • the shape of the mask layer 110 is an example, and the configuration is not particularly limited, and the shape can be changed as appropriate depending on the equipment provided.
  • the mask layers 110 may have the same shape or different shapes.
  • the mask layer 110 laminated on one of the glass plates 11 and 12 can be composed only of the protrusions 112 .
  • the position of the imaging window 113 in the mask layer 110 is not particularly limited, and can be changed as appropriate.
  • the position where the photographing window 113 is provided is preferably outside the test area A defined by JIS R 3212 (1998, "Automotive safety glass test method").
  • the heat generation layer 133 whose horizontal length is smaller than its vertical length is used.
  • a heat generating layer 133 with a small ⁇ can also be used.
  • the busbars 134 are arranged at the upper and lower ends of the heat generating layer 133, respectively.
  • one wiring 139 is formed to extend from the left end of one (upper) bus bar 134 to the upper side of the glass plates 11 and 12
  • the other wiring 139 is formed to extend from the other (lower) bus bar 134 can be formed so as to extend from the right end of the bus bar 134 to the upper sides of the glass plates 11 and 12 .
  • FIG. 11 is formed to extend from the left end of one (upper) bus bar 134 to the upper side of the glass plates 11 and 12
  • the other wiring 139 is formed to extend from the other (lower) bus bar 134 can be formed so as to extend from the right end of the bus bar 134 to the upper sides of the glass plates 11 and 12 .
  • both wirings 139 can be formed to extend from the same side (right end) of each bus bar 134 to the upper sides of the glass plates 11 and 12 .
  • the bus bar 134 may be laminated on the heat generating layer 133 or may be adjacent to the heat generating layer 133 .
  • the wiring 139 is connected to the bus bar 134, but these may be integrated to extend the bus bar 134 and wiring 139 to the ends of the glass plates 11 and 12, or to extend the wiring halfway to the ends. , the wires can be connected to each other and pulled out to the edge of the glass.
  • the heat generation layer 133 is formed in a rectangular shape, but is not limited thereto, and in two orthogonal directions, the maximum length of one of them is shorter than the maximum length of the other. If it is Therefore, the heating layer 133 may be trapezoidal, for example. Therefore, both bus bars 134 do not necessarily have to be arranged in parallel, and may be arranged obliquely depending on the shape of the heat generating layer 133 .
  • the pair of bus bars 134 are arranged on the heat generating layer 133, but instead of the heat generating layer, an optical layer or the like for changing the optical characteristics of the information acquisition area can be arranged. .
  • an optical layer or the like for changing the optical characteristics of the information acquisition area can be arranged.
  • by arranging the step forming members at both ends of the optical layer instead of the bus bars it is possible to suppress the perspective distortion in the information-oriented area.
  • the information acquisition device of the present invention is exemplified by a photographing device, but the information acquisition device is not limited to this. It may be a device that acquires
  • Examples 1 and 2 and Comparative Example 1 below were produced.
  • glass plate modules simulating the vicinity of the photographing window of the windshield were produced as Examples 1 and 2 and Comparative Examples 1 and 2.
  • Examples 1 and 2 and Comparative Example 1 are composed of the following materials.
  • the first and second adhesive layers of the intermediate film PVB, thickness 0.38 mm
  • Heat-generating layer transparent conductive film obtained by coating ITO on a PET base film, 160 mm (horizontal) ⁇ 90 mm (vertical), thickness 125 ⁇ m (Example 1, Comparative Example 1), thickness 50 ⁇ m (Example 2)
  • ⁇ Bus bar copper ribbon (fixed to the heating layer with low melting point solder), width 10 mm, thickness 50 ⁇ m,
  • FIG. 13 shows Examples 1 and 2, in which the busbars are arranged at the upper and lower ends of the heating layer, respectively.
  • FIG. 14 shows Comparative Example 1, in which the busbars are arranged at the left and right ends of the heat generating layer, respectively.
  • the cross sections of Examples 1 and 2 and Comparative Example 1 are configured in the same manner as in FIG.
  • the thickness of the glass plate was measured.
  • the thickness of the glass plate was measured at predetermined intervals from the upper edge on a line extending vertically in the center of the heat generating layer in the horizontal direction, and the difference from the smallest thickness was plotted, and the difference was plotted. created a graph.
  • the graph in FIG. 15 shows Example 1 and Comparative Example 1.
  • the graph in FIG. 16 shows Example 1 and Example 2. According to this graph, the smaller the thickness of the heat generating layer, the smaller the deflection amount of the glass plate. This is because the heat-generating layer is located in a part of the glass plate, and the heat-generating layer is less deformed than the adhesive layer. It is considered that the bending of the glass plate becomes large at .
  • Examples 3 and 4 and Comparative Examples 2 and 3 below were produced.
  • Examples 3 and 4 and comparative examples 2 and 3 have substantially the same configurations as those in FIGS. 13 and 14, respectively. Moreover, these cross sections are configured in the same manner as in FIG. Examples 3 and 4 and Comparative Examples 2 and 3 are composed of the following materials.
  • Heat-generating layer transparent conductive film obtained by coating ITO on a PET base film, 290 mm (horizontal) ⁇ 150 mm (vertical), thickness 125 ⁇ m (Example 3, Comparative Example 2), thickness 50 ⁇ m (Example 4, Comparative Example) 3)
  • ⁇ Bus bar copper ribbon (fixed to the heating layer with low melting point solder), width 10 mm, thickness 50 ⁇ m,
  • the perspective distortion (optical power) was measured for Examples 3 and 4 and Comparative Examples 2 and 3 produced as described above.
  • the glass plate module according to the example or the comparative example was placed between the camera and the target at an angle of 25 degrees from the horizontal.
  • a lattice pattern as shown in FIG. 18 was formed on the target, and this target was photographed with a camera through Examples and Comparative Examples to measure perspective distortion.
  • the focal length was calculated from the amount of deviation from the grid pattern of the target, and 1/(focal length) was defined as perspective distortion (mdpt).
  • FIG. 19 is a graph showing absolute values of perspective distortion in Examples 3 and 4 and Comparative Examples 2 and 3. According to the figure, if the thickness of the heat generating layer is the same, the see-through distortion is smaller in Examples 3 and 4 in which the distance between the busbars is narrower than in Comparative Examples 2 and 3. Further, it was found that perspective distortion increased as the thickness of the heat generating layer increased. As described above, if the thickness of the heat generating layer is large, the perspective distortion becomes large, but if the thickness of the heat generating layer is small, the heat generating layer tends to be deformed and is difficult to handle. Therefore, depending on the application, the thickness of the heat generating layer may have to be increased. In this case, the increase in perspective distortion can be suppressed by reducing the distance between the busbars.
  • the thickness of the heat generating layer at which the perspective distortion becomes 400 mdpt is considered to be 310 ⁇ m.
  • the thickness of the heat generating layer is preferably 310 ⁇ m or less.
  • the thickness of the heating layer and the distance between the bus bar and the imaging window were measured when the perspective distortion was 400 mdpt.
  • the results are as shown in FIG. In Example 3, it was 13 mm, and in Example 4, it was 8 mm. Therefore, it was found that the distance between the bus bar and the photographing window should preferably be 8 mm or less in order to prevent the problem of perspective distortion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Glass To Other Materials (AREA)

Abstract

La présente invention est un pare-brise d'automobile sur lequel un dispositif d'acquisition d'informations peut être disposé, le dispositif d'acquisition d'informations acquérant des informations à partir de l'extérieur du véhicule par émission et/ou réception de lumière, le pare-brise comprenant une plaque de verre externe, une plaque de verre interne disposée de façon à s'opposer à la plaque de verre externe et un film intermédiaire disposé entre la plaque de verre externe et la plaque de verre interne, le film intermédiaire comprenant : une couche de génération de chaleur disposée à une position correspondant à une zone d'acquisition d'informations qui est opposée au dispositif d'acquisition d'informations et transmet la lumière ; et une paire de barres omnibus configurées pour fournir de l'énergie à la couche de génération de chaleur, la couche de génération de chaleur étant formée de manière à s'étendre dans une première direction et une seconde direction orthogonale à la première direction, la couche de génération de chaleur étant formée pour être plus courte dans la première direction que dans la seconde direction, et la paire de barres omnibus étant respectivement disposées aux extrémités de la couche de génération de chaleur dans la première direction.
PCT/JP2022/034035 2021-09-15 2022-09-12 Pare-brise WO2023042785A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019099405A (ja) * 2017-11-29 2019-06-24 日本板硝子株式会社 ウインドシールド
WO2019230732A1 (fr) * 2018-05-30 2019-12-05 Ａｇｃ株式会社 Verre feuilleté
WO2020054286A1 (fr) * 2018-09-10 2020-03-19 Ａｇｃ株式会社 Verre et verre feuilleté
WO2020187619A1 (fr) * 2019-03-19 2020-09-24 Saint-Gobain Glass France Vitre feuilletée de véhicule à élément rapporté chauffant
WO2021136908A1 (fr) * 2020-01-03 2021-07-08 Saint-Gobain Glass France Vitrage feuillete de vehicule et dispositif avec systeme de vision proche infrarouge associe et sa fabrication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019099405A (ja) * 2017-11-29 2019-06-24 日本板硝子株式会社 ウインドシールド
WO2019230732A1 (fr) * 2018-05-30 2019-12-05 Ａｇｃ株式会社 Verre feuilleté
WO2020054286A1 (fr) * 2018-09-10 2020-03-19 Ａｇｃ株式会社 Verre et verre feuilleté
WO2020187619A1 (fr) * 2019-03-19 2020-09-24 Saint-Gobain Glass France Vitre feuilletée de véhicule à élément rapporté chauffant
WO2021136908A1 (fr) * 2020-01-03 2021-07-08 Saint-Gobain Glass France Vitrage feuillete de vehicule et dispositif avec systeme de vision proche infrarouge associe et sa fabrication

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