WO2019156030A1 - Verre feuilleté - Google Patents

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Publication number
WO2019156030A1
WO2019156030A1 PCT/JP2019/003889 JP2019003889W WO2019156030A1 WO 2019156030 A1 WO2019156030 A1 WO 2019156030A1 JP 2019003889 W JP2019003889 W JP 2019003889W WO 2019156030 A1 WO2019156030 A1 WO 2019156030A1
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WO
WIPO (PCT)
Prior art keywords
wedge
laminated glass
element layer
intermediate film
mrad
Prior art date
Application number
PCT/JP2019/003889
Other languages
English (en)
Japanese (ja)
Inventor
駿介 定金
裕平 儀間
Original Assignee
Ａｇｃ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ａｇｃ株式会社 filed Critical Ａｇｃ株式会社
Priority to DE112019000701.7T priority Critical patent/DE112019000701T5/de
Priority to JP2019570738A priority patent/JP7255501B2/ja
Publication of WO2019156030A1 publication Critical patent/WO2019156030A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images
    • 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
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • 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
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10293—Edge features, e.g. inserts or holes
    • 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
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10339—Specific parts of the laminated safety glass or glazing being colored or tinted
    • B32B17/10348—Specific parts of the laminated safety glass or glazing being colored or tinted comprising an obscuration band
    • 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
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10559—Shape of the cross-section
    • B32B17/10568—Shape of the cross-section varying in thickness
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/013—Head-up displays characterised by optical features comprising a combiner of particular shape, e.g. curvature
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B2027/0192—Supplementary details
    • G02B2027/0194—Supplementary details with combiner of laminated type, for optical or mechanical aspects

Definitions

  • the present invention relates to laminated glass.
  • HUD head-up display
  • a windshield of a vehicle that reflects an image on a windshield of a vehicle and displays predetermined information in a driver's field of view
  • the projected HUD image is reflected by the vehicle inner surface and the vehicle outer surface of the windshield, so that a reflection double image becomes a problem. Therefore, for example, a laminated glass having an improved reflection double image by providing a thickness deviation (wedge angle) on an intermediate film or glass has been studied.
  • the contrast ratio between the HUD image and the background is required to improve the contrast ratio between the HUD image and the background, and various techniques for achieving this requirement are being studied.
  • a light control element layer is sealed in a windshield, the light control element layer has a low visible light transmittance, and a HUD image is projected onto the light control element layer.
  • the contrast ratio between the HUD image and the background can be improved by reflecting the HUD image by the light control element layer.
  • the projected HUD image is reflected by the vehicle inner surface of the windshield and the vehicle inner surface of the light control element layer.
  • a reflected double image appears.
  • the contrast ratio between the HUD image and the background is improved and the color of the reflected double image is different from that of the main image, the reflected double image is more conspicuous than the conventional image, thereby reducing the reflected double image. Therefore, more strict measures are necessary.
  • the present invention has been made in view of the above points, and an object of the present invention is to obtain a HUD image that has a high contrast ratio with the background and is difficult to visually recognize a reflected double image.
  • the laminated glass is a laminated glass in which an intermediate film is sandwiched between a vehicle outer side glass plate and a vehicle inner side glass plate, and includes a display area that reflects a projection image from the vehicle and displays information.
  • a dimming element layer enclosed in the intermediate film is disposed in at least a part of the display area, and between the inner surface of the dimming element layer and the inner surface of the inner glass plate,
  • FIG. 2 is a partial cross-sectional view of a windshield 20A having a shape similar to that of FIG.
  • FIG. 1 is a diagram exemplifying a windshield for a vehicle, and is a diagram schematically showing a state in which the windshield is visually recognized from the vehicle interior to the vehicle exterior.
  • the windshield 20 includes a HUD display area R 1 to be used in HUD, and a HUD-display region R 2 is not used (fluoroscopy region) with HUD.
  • HUD display area R 1 rotates the mirror constituting the HUD, when viewed from the V1 point of JIS R3212, the range in which light from the mirror constituting the HUD is irradiated on the windshield 20.
  • the fluoroscopic region refers to a region where the visible light transmittance Tv is 70% or more.
  • the HUD display area R 1 is located below the windshield 20, and the HUD display outside area R 2 is located around the HUD display area R 1 of the windshield 20.
  • HUD display area R 1 and light control device layer 250 in a region in the vicinity thereof are provided.
  • HUD display area for example, as in the HUD display area R 11 and HUD display area R 12 shown in FIG. 1 (b), may be arranged separately in a plurality of locations in the Z direction.
  • HUD display area R 11 and light control device layer 250 in a region in the vicinity thereof it is provided, HUD display area R 12 and light control device layer 250 in the vicinity area provided It is not done.
  • the light control element layer 250 can be provided in at least a part of the HUD display area.
  • the HUD display area may be divided into a plurality of locations in the Y direction (not shown).
  • a dark shielding layer 29 exists on the peripheral edge of the windshield 20.
  • the shielding layer 29 may be a black ceramic layer.
  • the black ceramic layer can be formed by applying black ceramic printing ink on a glass surface and baking it.
  • the presence of the black opaque shielding layer 29 at the peripheral edge of the windshield 20 can suppress deterioration of the resin such as urethane that holds the peripheral edge of the windshield 20 due to ultraviolet rays.
  • FIG. 2 (a) is a partial cross-sectional view of the windshield 20 shown in FIG. 1 (a) cut in the XZ direction and viewed from the Y direction.
  • FIG. 2B is a partial cross-sectional view of the windshield 20 shown in FIG. 1B cut in the XZ direction and viewed from the Y direction.
  • the windshield 20 includes a glass plate 210 that is a vehicle inner side glass plate, a glass plate 220 that is a vehicle outer side glass plate, an intermediate film 230, and light control.
  • the glass plate 210 and the glass plate 220 are fixed with the intermediate film 230 sandwiched therebetween.
  • the intermediate film 230 is formed of a plurality of intermediate films.
  • the intermediate film 230 is formed of three layers of intermediate films 231, 232, and 233, but is formed of four or more layers of intermediate films. Also good.
  • the light control element layer 250 enclosed in the intermediate film 230 is disposed in at least a part of the HUD display area.
  • the inner surface of the intermediate film 231 is in contact with the glass plate 210, and a part of the outer surface of the intermediate film 231 covers the inner surface of the light control element layer 250.
  • the outer surface of the intermediate film 233 is in contact with the glass plate 220, and a part of the inner surface of the intermediate film 233 covers the outer surface of the light control element layer 250. That is, the intermediate film 230 includes an intermediate film 231 located on the vehicle inner side than the dimming element layer 250 and an intermediate film 233 located on the vehicle outer side than the dimming element layer 250.
  • the dimming element layer 250 is an intermediate film. It is sandwiched between the film 231 and the intermediate film 233.
  • the intermediate film 232 is disposed, for example, in a frame shape around the light control element layer 250 in a plan view, and is sandwiched between the intermediate film 231 and the intermediate film 233 together with the light control element layer 250. It is desirable that the thickness of the intermediate film 232 is approximately the same as the thickness of the light control element layer 250. As described above, by disposing the intermediate film 232 around the light control element layer 250, it is possible to suppress the remaining air during the production of the laminated glass and the subsequent foaming of the intermediate film. Further, the intermediate film 232 may not be used depending on the thickness of the light control element layer 250.
  • the thickness of the light control element layer 250 is preferably 0.1 mm or more and 0.5 mm or less, and more preferably 0.15 mm or more and 0.4 mm or less.
  • a suspended particle device (SPD) film can be used as the light control element layer 250 .
  • SPD film a general SPD constructed by sandwiching a polymer layer containing suspended particles that can be oriented by applying a voltage between two electrically insulating films coated with a transparent conductive film on the inside. Film can be used.
  • Such an SPD film has a high visible light transmittance and high transparency due to orientation of suspended particles in the polymer layer by applying a voltage between the transparent conductive films with the power switch turned on. become. When the power switch is off, the suspended particles in the polymer layer are not oriented, and the visible light transmittance is low and the transparency is low.
  • the SPD film for example, a commercially available product such as LCF-1103DHA (trade name, manufactured by Hitachi Chemical Co., Ltd.) can be used.
  • LCF-1103DHA trade name, manufactured by Hitachi Chemical Co., Ltd.
  • the thickness of the SPD film used for the windshield 20 is not particularly limited, but is preferably 0.2 to 0.4 mm from the viewpoint of handleability and availability.
  • the SPD film By using the SPD film, it is possible to electrically switch between a state where the visible light transmittance is high and a state where the visible light transmittance is low.
  • the contrast ratio between the HUD image and the background can be improved by projecting the HUD image onto the HUD display area where the SPD film is present in a state where the visible light transmittance of the SPD film is low.
  • the contrast ratio between the HUD image and the background can be improved also when a polymer dispersed liquid crystal (PDLC) is used as the light control element layer 250 instead of the SPD film.
  • PDLC polymer dispersed liquid crystal
  • a PDLC film can be made by mixing a prepolymer, a nematic liquid crystal, and a spacer material in a specific ratio, and then placed between two soft transparent conductive films.
  • the operating principle includes the following. When no electric field is applied, the liquid crystal droplets can be randomly distributed in the polymer material with the directors freely aligned.
  • the refractive index of the liquid crystal for normal light does not match that of the polymer material, causing a relatively strong scattering effect for the light, so that the appearance of the PDLC film is translucent or opaque “milky white” Become.
  • the liquid crystal droplets can be aligned along the direction of the external electric field because of their positive dielectric anisotropy characteristics. If the refractive index of the liquid crystal for normal light matches that of the polymer material, the light can pass through the PDLC film and thus the PDLC film will have a transparent appearance. Specifically, the higher the voltage supplied to the PDLC film, the more transparent the PDLC film.
  • PNLC polymer network liquid crystal
  • guest host liquid crystal photochromic, electrochromic, and electrokinetic
  • the contrast ratio between the HUD image and the background can be improved.
  • the front glass 20 is provided with a wiring conductor serving as a power feeding means to the light control element layer 250.
  • the wiring conductor is disposed, for example, so as to be hidden by the shielding layer 29 on the peripheral edge of the lower side of the windshield 20.
  • the voltage applied to the light control element layer 250 can be controlled and used in a transparent state. By making it transparent, the contrast of the HUD image is lowered, but the outside scene can be easily seen through the area where the light control element layer is arranged, so that the field of view for the driver is widened. is there. This is particularly effective when the ambient brightness is dark and the contrast of the HUD image becomes sufficiently large, such as at night or in a tunnel.
  • a sensor that senses the intensity of outside light is provided, and a means for automatically adjusting the voltage applied to the light control element layer 250 according to the intensity of outside light may be taken. it can.
  • an inner surface 21 of the windshield 20 that is one surface of the glass plate 210 that is the inner side of the vehicle and an outer surface 22 of the windshield 20 that is one surface of the glass plate 220 that is the outer side of the vehicle are: It may be a flat surface or a curved surface.
  • the windshield 20 is vertical when the windshield 20 is attached to the vehicle between the inner surface of the light control element layer 250 and the inner surface (inner surface 21) of the glass plate 210.
  • a wedge-shaped region in section view is thicker at the upper end side in the direction than the lower end side, and the wedge angle of the wedge-shaped region in section view is ⁇ .
  • the intermediate film 231 located inside the vehicle from the light control element layer 250 is formed in a wedge shape in cross section, and the thicknesses of the glass plates 210 and 220 and the intermediate films 232 and 233 are the same. Is uniform. Since the wedge angle of the intermediate film 231 is ⁇ i and the thicknesses of the glass plates 210 and 220 and the intermediate films 232 and 233 are uniform, the wedge angle ⁇ i of the intermediate film 231 is determined by the inner surface 21 and the outer surface 22 of the windshield 20. Is equal to the wedge angle ⁇ (the wedge angle of the entire laminated glass).
  • the increase in thickness from the lower end side to the upper end side of the intermediate film 231 may be a monotonous increase in which the rate of increase is constant, or the rate of increase may partially change.
  • the portion located inside the vehicle from the light control element layer 250 is formed in a wedge shape in cross section, so that the light control element layer 250 is visible.
  • the above-mentioned wedge angle ⁇ is a minimum of two values from 13 data existing in the range of 30 mm before and after a certain point from the thickness of the windshield 20 measured every 5 mm in the vertical direction when the windshield 20 is attached to the vehicle.
  • the average change rate of the thickness of the windshield 20 obtained by multiplication is used.
  • the wedge angles of the glass plate and the interlayer film are also determined as described above.
  • the increase in thickness from the lower end side to the upper end side of the windshield 20 may be a monotonous increase in which the rate of increase is constant, or the rate of increase may partially change.
  • the wedge angle ⁇ i is preferably greater than 0 mrad and equal to or less than 0.8 mrad.
  • the wedge angle ⁇ i is more preferably greater than 0 mrad and less than or equal to 0.6 mrad, and more preferably greater than 0 mrad and less than or equal to 0.4 mrad. This is because the color of the HUD image can be controlled to be closer to the actual color within the above range.
  • the wedge angle ⁇ i when the wedge angle ⁇ i is 0.6 mrad or less, or 0.4 mrad or less, the above effect can be easily obtained even when the imaging distance of the HUD image is long.
  • the wedge angle ⁇ i may be 0.05 mrad or more, or 0.1 mrad or more.
  • the curvature of the windshield 20 in the vertical direction is preferably a radius of 4000 mm or more, and more preferably a radius of 5000 mm or more.
  • the curvature of the horizontal direction of the windshield 20 is 1000 mm or more in radius, and it is more preferable that it is 1200 mm or more in radius. If the curvatures in the vertical direction and the horizontal direction are within the above ranges, it is possible to reduce distortion such as image inclination and expansion / contraction when the viewpoint of the HUD image projected onto the light control element layer 250 is moved.
  • the space between the inner surface (inner surface 21) of the glass plate 210 and the outer surface (outer surface 22) of the glass plate 220 is preferable that a wedge-shaped region in cross-sectional view is provided in which the thickness of the upper end side in the vertical direction when the windshield 20 is attached to the vehicle is thicker than the lower end side.
  • the setting of the wedge angle ⁇ i may not be as strict as the region where the light control element layer 250 is sealed in the intermediate film 230. .
  • the wedge angle ⁇ i is preferably greater than 0 mrad and equal to or less than 1.0 mrad. If the wedge angle ⁇ i is within this range, the visibility of the main image can be sufficiently improved.
  • the wedge angle ⁇ is preferably greater than 0 mrad and 1.0 mrad or less, more preferably 0.2 mrad or more and 0.9 mrad or less, and further preferably 0.2 mrad or more and 0.8 mrad or less. .
  • the intermediate film 231 is formed in a wedge shape in cross section, but one or both of the intermediate film 231 and the glass plate 210 may be formed in a wedge shape in cross section. That is, only the intermediate film 231 may be formed in a wedge shape in cross-sectional view with a wedge angle ⁇ i, or only the glass plate 210 may be formed in a wedge shape in cross-sectional view with a wedge angle ⁇ i. Alternatively, the intermediate film 231 and the glass plate 210 may be formed in a wedge shape in cross section, and the total of the wedge angle of the intermediate film 231 and the wedge angle of the glass plate 210 may be defined as the wedge angle ⁇ i.
  • the intermediate film 232 may be formed in a wedge shape in cross section, or the light control element layer 250 is not sealed.
  • the intermediate film 233 may be formed in a wedge shape in cross section in a region or a region in which the light control element layer 250 is enclosed.
  • the glass plate 210 When the glass plate 210 is formed in a wedge shape, when the glass plate 210 is manufactured by the float process, it can be obtained by devising the manufacturing conditions. That is, by adjusting the peripheral speed of a plurality of rolls arranged at both ends in the width direction of the glass ribbon traveling on the molten metal, the glass cross section in the width direction is made into a concave shape, a convex shape, or a tapered shape. What is necessary is just to cut out the part with plate thickness change.
  • the increase in the plate thickness from the lower end side to the upper end side of the glass plate 210 may be a monotonous increase in which the rate of increase is constant, or the rate of increase may partially change.
  • the glass plates 210 and 220 for example, soda lime glass, aluminosilicate, organic glass, or the like can be used.
  • soda lime glass the double iron image of HUD becomes difficult to see, and from the viewpoint of the thermal insulation of the occupant, either of the glass plates 210 and 220 has a total iron content of Fe 2 O in the composition. It is preferably 0.4% by mass or more of green glass in terms of 3 .
  • the thickness of the glass plate 220 located outside the windshield 20 is preferably 1.8 mm or more and 3 mm or less at the thinnest part.
  • the thickness of the glass plate 220 is 1.8 mm or more, strength such as stepping stone performance is sufficient, and when it is 3 mm or less, the mass of the laminated glass does not become too large, which is preferable in terms of vehicle fuel consumption.
  • board thickness of the glass plate 220 1.8 mm or more and 2.8 mm or less are more preferable in the thinnest part, and 1.8 mm or more and 2.6 mm or less are still more preferable.
  • board thickness of the glass plate 210 located inside the windshield 20 is 0.3 mm or more and 2.3 mm or less.
  • the plate thickness of the glass plate 210 is 0.3 mm or more, the handling property is good, and when it is 2.3 mm or less, the mass of the windshield 20 does not become too large.
  • the glass quality (for example, residual stress) can be maintained by setting the thickness of the glass plate 210 to 0.3 mm or more and 2.3 mm or less. Setting the thickness of the glass plate 210 to 0.3 mm or more and 2.3 mm or less is particularly effective in maintaining the glass quality (for example, residual stress) in deeply bent glass.
  • the thickness of the glass plate 210 is more preferably from 0.5 mm to 2.1 mm, and still more preferably from 0.7 mm to 1.9 mm.
  • the glass plates 210 and 220 are bent after being formed by the float method and before being bonded by the intermediate film 230. Bending is performed by softening the glass by heating. The glass heating temperature during bending is approximately 550 ° C. to 700 ° C.
  • the intermediate film 230 (intermediate films 231, 232, and 233) that bonds the glass plate 210 and the glass plate 220 is preferably a thermoplastic resin, such as a plasticized polyvinyl acetal resin or plasticized Conventionally, such as polyvinyl chloride resin, saturated polyester resin, plasticized saturated polyester resin, polyurethane resin, plasticized polyurethane resin, ethylene-vinyl acetate copolymer resin, ethylene-ethyl acrylate copolymer resin, etc.
  • the thermoplastic resin currently used for the kind of use is mentioned.
  • the resin composition containing the modified block copolymer hydride described in the patent 6065221 can also be used conveniently.
  • a plasticized polyvinyl acetal resin is excellent in balance of various properties such as transparency, weather resistance, strength, adhesive strength, penetration resistance, impact energy absorption, moisture resistance, heat insulation, and sound insulation.
  • thermoplastic resins may be used alone or in combination of two or more.
  • “Plasticization” in the plasticized polyvinyl acetal resin means that it is plasticized by adding a plasticizer. The same applies to other plasticized resins.
  • the resin not containing a plasticizer examples include ethylene-vinyl acetate copolymer resin.
  • the polyvinyl acetal-based resin is a polyvinyl formal resin obtained by reacting polyvinyl alcohol (hereinafter sometimes referred to as “PVA” if necessary) and formaldehyde, and a narrow meaning obtained by reacting PVA and acetaldehyde.
  • PVB is preferred because of its excellent balance of various properties such as strength, adhesive strength, penetration resistance, impact energy absorption, moisture resistance, heat insulation, and sound insulation.
  • These polyvinyl acetal resins may be used alone or in combination of two or more.
  • the material for forming the intermediate film 230 is not limited to the thermoplastic resin.
  • the thickness of the intermediate film 230 is preferably 0.5 mm or more at the thinnest part in total thickness. When the thickness of the intermediate film 230 is 0.5 mm or more, the penetration resistance necessary for the windshield is sufficient.
  • the thickness of the intermediate film 230 is preferably 3 mm or less at the thickest portion in total thickness. When the maximum thickness of the intermediate film 230 is 3 mm or less, the mass of the laminated glass does not become too large.
  • the maximum value of the thickness of the intermediate film 230 is more preferably 2.8 mm or less, and even more preferably 2.6 mm or less.
  • one or more of the intermediate film 231, the intermediate film 232, and the intermediate film 233 may include three or more layers.
  • the sound insulation of the laminated glass can be improved by forming the intermediate film from three layers and making the hardness of the middle layer lower than the hardness of the layers on both sides by adjusting the plasticizer or the like.
  • the hardness of the layers on both sides may be the same or different.
  • the light source of the HUD is located below the passenger compartment and projected from there to the laminated glass. Since the projected images are reflected by the back and front surfaces of the glass plates 210 and 220, the thickness of the glass plate changes in parallel to the projection direction in order to overlap the two reflected images so that a double image is not generated. It is necessary to.
  • the glass plates 210 and 220 are float glass, they have streaks parallel to the flow direction when the glass plate is manufactured.
  • the thickness of the glass plate 220 changes in a direction perpendicular to the streak, the streak direction is perpendicular to the projection direction, that is, the streak is a vehicle interior observer (driver).
  • the horizontal direction and must be used in a direction in which visibility deteriorates due to perspective distortion.
  • the laminated glass produced using the glass plate 210, the glass plate 220, and the intermediate film 230 should be arranged so that the lines of the glass plate 210 and the lines of the glass plate 220 are orthogonal to each other. Is preferred. With this arrangement, the distortion that is worsened by the glass plate 210 alone is alleviated by the presence of the glass plate 220 having straight lines and the intermediate film 230 that bonds the glass plate 210 and the glass plate 220 together.
  • the above-mentioned resin material that becomes each of the intermediate films is appropriately selected, and extrusion molding is performed in a heated and melted state using an extruder.
  • the extrusion conditions such as the extrusion speed of the extruder are set to be uniform.
  • the extruded films are stretched as necessary, for example, in order to give curvature to the upper and lower sides in accordance with the design of the windshield 20, thereby completing the intermediate films 231, 232, and 233. .
  • a laminated body is formed by sandwiching the intermediate film 231, the light control element layer 250, the intermediate film 232, and the intermediate film 233 between the glass plate 210 and the glass plate 220.
  • the intermediate film 232 is disposed around the light control element layer 250.
  • the laminate is put in a rubber bag and bonded at a temperature of about 70 to 110 ° C. in a vacuum of ⁇ 65 to ⁇ 100 kPa.
  • a laminated glass having higher durability can be obtained by performing a pressure-bonding treatment by heating and pressing under conditions of 100 to 150 ° C. and a pressure of 0.6 to 1.3 MPa.
  • the heating and pressing step may not be used in consideration of simplification of the process and the characteristics of the material to be enclosed in the laminated glass.
  • a film or a device having functions such as heat generation and an antenna may be included.
  • FIG. The glass plate 210 or the glass plate 220 may be coated.
  • glass plates 210 and 220 are prepared (size: 300 mm ⁇ 300 mm ⁇ plate thickness 2 mm, plate thickness is uniform), and Comparative Examples 1 to 4, Reference Examples 1 to 3,
  • laminated glasses of Examples 1 to 6 were produced.
  • an SPD film is used as the light control element layer 250.
  • As the green glass a generic name VFL manufactured by AGC was used.
  • As clear glass AGC's common name FL was used.
  • the product name Mersen G7060 manufactured by Tosoh Nickemi Co., Ltd. was used as the intermediate film.
  • trade name LCF-1103DHA thinness 0.35 mm
  • Hitachi Chemical Co., Ltd. was used.
  • the laminated glass of Comparative Example 1 uses green glass for the glass plates on the inside and outside of the vehicle, does not have a wedge-shaped region in cross section, and the SPD film is not sealed in the intermediate film 230.
  • the laminated glass of Comparative Example 2 uses green glass for the vehicle inner and outer glass plates and has a wedge-shaped region in cross section (wedge angle 0.3 mrad), but the SPD film is enclosed in the intermediate film 230.
  • the laminated glass of Comparative Example 3 uses green glass for the glass plates on the vehicle inner side and the vehicle outer side and does not have a wedge-shaped region in cross section, but an SPD film is enclosed in the intermediate film 230.
  • the laminated glass of Comparative Example 4 uses green glass for the inner and outer glass plates, has a wedge-shaped region in cross section (wedge angle 1.0 mrad), and an SPD film is sealed in the intermediate film 230. Yes.
  • the laminated glass of Example 1 uses green glass for the glass plates on the vehicle inner side and the vehicle outer side, has a wedge-shaped region in cross section (wedge angle 0.8 mrad), and an SPD film is sealed in the intermediate film 230. Yes.
  • the laminated glass of Example 2 uses green glass for the glass plates on the vehicle inner side and the vehicle outer side, has a wedge-shaped region in cross section (wedge angle 0.6 mrad), and an SPD film is sealed in the intermediate film 230.
  • the laminated glass of Example 3 uses green glass for the glass plates on the vehicle inner side and the vehicle outer side, has a wedge-shaped region in sectional view (wedge angle 0.4 mrad), and an SPD film is sealed in the intermediate film 230.
  • the laminated glass of Example 4 uses clear glass for the vehicle inner and outer glass plates, has a wedge-shaped region in cross section (wedge angle 0.4 mrad), and an SPD film is sealed in the intermediate film 230. Yes.
  • the laminated glass of Examples 5 and 6 uses green glass for the glass plates on the inside and outside of the vehicle, and has a wedge-shaped region in sectional view (wedge angle 0.8 mrad). ), An SPD film is enclosed in the intermediate film 230. However, in Examples 5 and 6, the voltage applied to the SPD film was set to a value different from that in Example 1 in order to confirm the influence of the visible light transmittance Tv on the image contrast and the like. The light transmittance Tv is increased.
  • the laminated glass of Reference Examples 1 to 3 uses green glass for the glass plates on the inside and outside of the vehicle, and has a wedge-shaped region in cross section (wedge angle 0.8 mrad). ), An SPD film is enclosed in the intermediate film 230.
  • the voltage applied to the SPD film was set to a value different from those in Examples 5 and 6, and Example 5 and The visible light transmittance Tv is further increased than 6.
  • the predetermined wavelengths (436 nm, 546 nm, and 700 nm) are wavelengths corresponding to red, green, and blue in the RGB color system defined by CIE, and if the difference in reflectance corresponding to these is large, the color change of the reflected image is visually recognized. .
  • each evaluation in Comparative Examples 1 and 2 is performed by projecting a HUD image on the HUD display area and determining whether or not the user feels uncomfortable with the naked eye. The case where the user feels “x”.
  • the laminated glass of Comparative Example 1 does not have a wedge-shaped region in cross section, and therefore the distance between the main image and the reflected double image is large, and the reflected double image is conspicuous.
  • the laminated glass of Comparative Example 1 since the SPD film was not sealed in the intermediate film 230, the color of the reflected double image and the color of the main image were the same, but the image contrast was poor.
  • the laminated glass of Comparative Example 2 Since the laminated glass of Comparative Example 2 has a wedge-shaped region in cross section, the distance between the main image and the reflected double image is small, and the reflected double image is not conspicuous. In the laminated glass of Comparative Example 2, since the SPD film was not sealed in the intermediate film 230, the color of the reflected double image and the color of the main image were the same, but the image contrast was poor.
  • the laminated glass of Comparative Example 3 does not have a wedge-shaped region in cross section, the distance between the main image and the reflected double image is large, and the reflected double image is conspicuous.
  • the laminated glass of Comparative Example 3 since the SPD film was sealed in the intermediate film 230, the contrast of the image was good, but the color of the reflected double image was conspicuous and the visibility was poor.
  • the laminated glass of Comparative Example 4 has a wedge-shaped region in cross section, but the distance between the main image and the reflected double image is large, and the reflected double image is conspicuous. This is considered to be because the distance between the main image and the reflected double image cannot be sufficiently controlled because the wedge angle is large (1.0 mrad).
  • the laminated glass of Comparative Example 4 since the SPD film was enclosed in the intermediate film 230, the image contrast was good, but the color of the reflected double image was conspicuous and the visibility was poor.
  • the laminated glass of Example 1 since the laminated glass of Example 1 has a wedge-shaped region in cross section, the distance between the main image and the reflected double image is small, and the reflected double image is not conspicuous. The distance between the main image and the reflected double image cannot be sufficiently controlled when the wedge angle is 1.0 mrad as in Comparative Example 4, but the distance between the main image and the reflected double image can be sufficiently controlled when the wedge angle is 0.8 mrad. Was confirmed.
  • the laminated glass of Example 1 had good image contrast because the SPD film was sealed in the intermediate film 230. Since the distance between the reflected double images was small and the main image and the reflected double image almost overlapped, the color of the reflected double image was not visible, and the visibility of the main image was good.
  • the laminated glass of Example 2 Since the laminated glass of Example 2 has a wedge-shaped region in cross section, the distance between the main image and the reflected double image is small, and the reflected double image is not conspicuous. It was confirmed that the distance between the main image and the reflected double image can be sufficiently controlled when the wedge angle is 0.6 mrad. Further, in the laminated glass of Example 2, since the SPD film was sealed in the intermediate film 230, the contrast of the image was good. Since the distance between the reflected double images was small and the main image and the reflected double image almost overlapped, the color of the reflected double image was not visible, and the visibility of the main image was good.
  • the laminated glass of Example 3 Since the laminated glass of Example 3 has a wedge-shaped region in cross section, the distance between the main image and the reflected double image is small, and the reflected double image is not conspicuous. It was confirmed that the distance between the main image and the reflected double image can be sufficiently controlled when the wedge angle is 0.4 mrad. Further, in the laminated glass of Example 3, since the SPD film was sealed in the intermediate film 230, the contrast of the image was good. Since the distance between the reflected double images was small and the main image and the reflected double image almost overlapped, the color of the reflected double image was not visible, and the visibility of the main image was good.
  • the laminated glass of Example 4 Since the laminated glass of Example 4 has a wedge-shaped region in cross section, the distance between the main image and the reflected double image is small, and the reflected double image is not conspicuous. It was confirmed that the distance between the main image and the reflected double image can be sufficiently controlled when the wedge angle is 0.4 mrad. Further, in the laminated glass of Example 4, since the SPD film was sealed in the intermediate film 230, the contrast of the image was good. Since the distance between the reflected double images was small and the main image and the reflected double image almost overlapped, the color of the reflected double image was not visible, and the visibility of the main image was good.
  • Example 3 The difference from Example 3 is that clear glass is used for the glass plates on the inside and outside of the vehicle, but the difference in reflectance at a predetermined wavelength changes, but the glass plates on the inside and outside of the vehicle as a whole. It can be said that there is no significant difference from the case of using green glass.
  • Examples 5 and 6 are examples in the case where the voltage applied to the SPD film is changed in the configuration of Example 1 to slightly change the visible light transmittance, but the visible light transmittance is 2.8%. Also, it was found that the image contrast was good even at 4.5% and 4.5%. Compared with Example 1 of 0.5%, the contrast was slightly lowered. On the other hand, as shown in Reference Example 3, when the visible light transmittance was increased to 25%, the contrast was greatly reduced, resulting in a great discomfort with respect to the visibility. From this, it was found that the contrast of the image is influenced by the transmittance of the light control element layer in addition to the wedge angle. Therefore, the visible light transmittance of the light control element layer 250 is preferably 20% or less, more preferably 5% or less, and still more preferably 1% or less from the viewpoint of image contrast.
  • the SPD film sealed in the intermediate film is disposed in at least a part of the HUD display region,
  • the contrast ratio with the background is increased. It is possible to obtain a HUD image that is high and is difficult to visually recognize the reflected double image.
  • ⁇ Variation 1 of the first embodiment In the first modification of the first embodiment, an example in which a wedge-shaped region in cross-sectional view is provided on the vehicle outer side than the light control element layer 250 is shown. In the first modification of the first embodiment, the description of the same components as those of the already described embodiments may be omitted.
  • FIG. 4 (a) is a partial cross-sectional view of the windshield 20A having the same shape as that of FIG. 1 (a) cut in the XZ direction and viewed from the Y direction.
  • FIG. 4B is a partial cross-sectional view of the windshield 20A having the same shape as that in FIG.
  • the windshield 20A shown in FIGS. 4 (a) and 4 (b) has a wedge shape in cross section that increases in thickness from the lower end side to the upper end side of the windshield 20A when the windshield 20A is attached to the vehicle.
  • the wedge angle is ⁇ .
  • the windshield 20A is different from the windshield 20 (see FIG. 2 and the like) in that both the vehicle inner side and the vehicle outer side are formed in a wedge shape in cross section than the light control element layer 250.
  • the intermediate film 231 located on the vehicle inner side with respect to the light control element layer 250 is formed in a wedge shape in sectional view, and is located on the vehicle outer side with respect to the light control element layer 250.
  • the intermediate film 233A is formed in a wedge shape in cross section. The thicknesses of the glass plates 210 and 220 and the intermediate film 232 are uniform.
  • the wedge angle of the intermediate film 231 is ⁇ i
  • the wedge angle of the intermediate film 233A is ⁇ j
  • the thicknesses of the glass plates 210 and 220 and the intermediate film 232 are uniform
  • the total of the wedge angle ⁇ j of 233A is equal to the wedge angle ⁇ formed by the inner surface 21 and the outer surface 22 of the windshield 20 (the wedge angle of the entire laminated glass).
  • the intermediate film 233 ⁇ / b> A is formed in a wedge shape in cross section, but one or both of the intermediate film 233 ⁇ / b> A and the glass plate 220 may be formed in a wedge shape in cross section. That is, only the intermediate film 233A may be formed in a wedge shape in a sectional view with a wedge angle ⁇ j, or only the glass plate 220 may be formed in a wedge shape in a sectional view with a wedge angle ⁇ j. Alternatively, the intermediate film 233A and the glass plate 220 may be formed in a wedge shape in cross section, and the total of the wedge angle of the intermediate film 233A and the wedge angle of the glass plate 220 may be set as the wedge angle ⁇ j.
  • the wedge angle ⁇ i is preferably greater than 0 mrad and equal to or less than 0.8 mrad.
  • the wedge angle ⁇ i is preferably greater than 0 mrad and equal to or less than 0.8 mrad.
  • the wedge angle ⁇ i is more preferably greater than 0 mrad and less than or equal to 0.6 mrad, and more preferably greater than 0 mrad and less than or equal to 0.4 mrad. This is because the color of the HUD image can be controlled to be more realistic.
  • the wedge angle ⁇ j is preferably greater than 0 mrad and less than or equal to 0.8 mrad.
  • the wedge angle ⁇ j when the wedge angle ⁇ j is set to 0.8 mrad or less, the main image reflected from the inner surface of the windshield and the windshield vehicle when the light control element layer 250 has a high visible light transmittance. The distance of the reflected double image reflected from the outer surface is reduced to make the main image and the reflected double image almost overlap each other, thereby making the color of the reflected double image invisible, so that the color of the HUD image is actually realized. Can be controlled close to At this time, there may be a reflection double image (substantially the image appears to be triple) reflected by the inner surface of the light control element layer 250, but for this, the wedge angle ⁇ i is larger than 0 mrad. By setting it to 0.8 mrad or less, it can be superimposed on the main image.
  • the wedge angle ⁇ j is more preferably greater than 0 mrad and less than or equal to 0.6 mrad, and more preferably greater than 0 mrad and less than or equal to 0.4 mrad.
  • the wedge angle ⁇ i may be 0.05 mrad or more, or 0.1 mrad or more.
  • the intermediate film 233A located on the vehicle outer side from the light control element layer 250 in a wedge shape in cross section, the light control element layer 250 has a high visible light transmittance.
  • the intermediate film 232 may be wedge-shaped in cross section.
  • the light control element layer 250 is in a state where the visible light transmittance is high, there is light reflected from the vehicle inner surface (inner surface 21) of the windshield 20A and the vehicle inner surface of the light control element layer.
  • a reflected double image is generated, the distance between the main image and the reflected double image can be reduced by the wedge-shaped intermediate film 231 in cross section.
  • the wedge-shaped intermediate film 233A causes the main image to be reflected. And the reflection double image can be reduced. As a result, an HUD image in which the reflected double image is difficult to visually recognize can be obtained.
  • the contrast ratio between the HUD image and the background can be improved as in the first embodiment.
  • the contrast ratio between the HUD image and the background can be improved as in the first embodiment.
  • the distance between the main image and the reflected double image can be reduced. As a result, it is possible to obtain an HUD image having a high contrast ratio with the background and making it difficult to visually recognize the reflected double image.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Joining Of Glass To Other Materials (AREA)

Abstract

L'invention concerne un verre feuilleté dans lequel un film intermédiaire est pris en sandwich entre une plaque de verre côté extérieur d'un véhicule et une plaque de verre côté intérieur du véhicule, une région d'affichage, sur laquelle une image projetée depuis l'intérieur du véhicule est réfléchie et des informations sont affichées, étant disposée dans le verre feuilleté, une couche d'élément d'atténuation enfermée dans la couche intermédiaire étant agencée dans au moins une partie de la région d'affichage, une région en forme de coin comme observé dans la direction transversale étant disposée entre une surface côté intérieur du véhicule de la couche d'élément d'atténuation et une surface côté intérieur du véhicule de la plaque de verre côté intérieur du véhicule, l'épaisseur sur un côté d'extrémité supérieure étant supérieure à celle sur un côté d'extrémité inférieure dans la région en forme de coin comme observé dans la direction transversale et comme observé dans la direction verticale lorsque le verre feuilleté est installé dans un véhicule, et l'angle de coin de la région en forme de coin comme observé dans la direction transversale étant supérieur à 0 mrad, mais inférieur ou égal à 0,8 mrad.
PCT/JP2019/003889 2018-02-07 2019-02-04 Verre feuilleté WO2019156030A1 (fr)

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WO2021063660A1 (fr) 2019-10-02 2021-04-08 Saint-Gobain Glass France Vitre feuilletée de sécurité destinée aux affichages tête haute
WO2021075294A1 (fr) * 2019-10-17 2021-04-22 Ａｇｃ株式会社 Verre feuilleté, son procédé de fabrication et verre multi-couche
JP2021085991A (ja) * 2019-11-27 2021-06-03 京セラ株式会社 ヘッドアップディスプレイシステム及び移動体
JP2021088486A (ja) * 2019-12-04 2021-06-10 日本板硝子株式会社 自動車用の合わせガラス
CN114815263A (zh) * 2022-05-25 2022-07-29 福耀玻璃工业集团股份有限公司 抬头显示系统及设计方法
CN114839780A (zh) * 2022-05-25 2022-08-02 福耀玻璃工业集团股份有限公司 抬头显示系统及抬头显示系统的设计方法
WO2022207004A1 (fr) * 2021-04-16 2022-10-06 福耀玻璃工业集团股份有限公司 Verre d'affichage tête haute et système d'affichage tête haute
CN115675029A (zh) * 2022-09-06 2023-02-03 福耀玻璃工业集团股份有限公司 夹层玻璃组件及车辆
WO2024071341A1 (fr) * 2022-09-30 2024-04-04 積水化学工業株式会社 Film intermédiaire pour verre feuilleté, et verre feuilleté
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Cited By (20)

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Publication number Priority date Publication date Assignee Title
WO2021063660A1 (fr) 2019-10-02 2021-04-08 Saint-Gobain Glass France Vitre feuilletée de sécurité destinée aux affichages tête haute
DE202020005672U1 (de) 2019-10-02 2022-01-10 Saint-Gobain Glass France Verbundsicherheitsglasscheibe für Head-Up Displays
WO2021075294A1 (fr) * 2019-10-17 2021-04-22 Ａｇｃ株式会社 Verre feuilleté, son procédé de fabrication et verre multi-couche
JP7332448B2 (ja) 2019-11-27 2023-08-23 京セラ株式会社 ヘッドアップディスプレイシステム及び移動体
JP2021085991A (ja) * 2019-11-27 2021-06-03 京セラ株式会社 ヘッドアップディスプレイシステム及び移動体
WO2021106689A1 (fr) * 2019-11-27 2021-06-03 京セラ株式会社 Système d'affichage tête haute et corps mobile
US11977226B2 (en) 2019-11-27 2024-05-07 Kyocera Corporation Head-up display system and movable body
EP4067972A4 (fr) * 2019-11-27 2024-02-14 Kyocera Corp Système d'affichage tête haute et corps mobile
US11881130B2 (en) 2019-11-27 2024-01-23 Kyocera Corporation Head-up display system and moving body
WO2021112003A1 (fr) * 2019-12-04 2021-06-10 日本板硝子株式会社 Verre feuilleté pour véhicule
EP4071121A4 (fr) * 2019-12-04 2023-12-20 Nippon Sheet Glass Company, Limited Verre feuilleté pour véhicule
CN114746375A (zh) * 2019-12-04 2022-07-12 日本板硝子株式会社 汽车用的夹层玻璃
JP7449082B2 (ja) 2019-12-04 2024-03-13 日本板硝子株式会社 自動車用の合わせガラス
JP2021088486A (ja) * 2019-12-04 2021-06-10 日本板硝子株式会社 自動車用の合わせガラス
WO2022207004A1 (fr) * 2021-04-16 2022-10-06 福耀玻璃工业集团股份有限公司 Verre d'affichage tête haute et système d'affichage tête haute
CN114815263B (zh) * 2022-05-25 2023-08-18 福耀玻璃工业集团股份有限公司 抬头显示系统及设计方法
CN114839780A (zh) * 2022-05-25 2022-08-02 福耀玻璃工业集团股份有限公司 抬头显示系统及抬头显示系统的设计方法
CN114815263A (zh) * 2022-05-25 2022-07-29 福耀玻璃工业集团股份有限公司 抬头显示系统及设计方法
CN115675029A (zh) * 2022-09-06 2023-02-03 福耀玻璃工业集团股份有限公司 夹层玻璃组件及车辆
WO2024071341A1 (fr) * 2022-09-30 2024-04-04 積水化学工業株式会社 Film intermédiaire pour verre feuilleté, et verre feuilleté

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