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WO2025233179A1 - Vitre composite ayant un revêtement réfléchissant fourni en parties - Google Patents

Vitre composite ayant un revêtement réfléchissant fourni en parties

Info

Publication number
WO2025233179A1
WO2025233179A1 PCT/EP2025/061702 EP2025061702W WO2025233179A1 WO 2025233179 A1 WO2025233179 A1 WO 2025233179A1 EP 2025061702 W EP2025061702 W EP 2025061702W WO 2025233179 A1 WO2025233179 A1 WO 2025233179A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
refractive index
pane
composite
optically
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/EP2025/061702
Other languages
German (de)
English (en)
Inventor
Julie RUFF
Jan Hagen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Sekurit France
Original Assignee
Saint Gobain Sekurit France
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 Saint Gobain Sekurit France filed Critical Saint Gobain Sekurit France
Publication of WO2025233179A1 publication Critical patent/WO2025233179A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B32B1/00—Layered products having a non-planar shape
    • 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
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B32B17/10201—Dielectric coatings
    • 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
    • B32B17/10247—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons
    • B32B17/10256—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques
    • B32B17/10266—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques on glass pane
    • 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
    • B32B17/10651—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 comprising colorants, e.g. dyes or pigments
    • B32B17/1066—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 comprising colorants, e.g. dyes or pigments imparting a tint in certain regions only, i.e. shade 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
    • B32B17/10761—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 containing vinyl acetal
    • 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
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10889—Making laminated safety glass or glazing; Apparatus therefor shaping the sheets, e.g. by using a mould
    • 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
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
    • B32B17/10935—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin as a preformed layer, e.g. formed by extrusion
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/14—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces
    • B32B5/142—Variation across the area of the layer
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
    • C03C17/3417—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials all coatings being oxide coatings
    • 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
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/28—Multiple coating on one surface
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4023—Coloured on the layer surface, e.g. ink
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/41—Opaque
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
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    • B32B2307/40—Properties of the layers or laminate having particular optical properties
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    • B32B2307/70—Other properties
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    • B32B2307/7375—Linear, e.g. length, distance or width
    • B32B2307/7376—Thickness
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • C—CHEMISTRY; METALLURGY
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    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/70—Properties of coatings
    • C03C2217/73—Anti-reflective coatings with specific characteristics
    • C03C2217/734—Anti-reflective coatings with specific characteristics comprising an alternation of high and low refractive indexes

Definitions

  • the invention relates to a composite disc with a reflective coating arranged in certain areas and its use, as well as a projection arrangement.
  • HUDs head-up displays
  • These systems consist of an image display device and a windshield with a wedge-shaped thermoplastic interlayer and/or wedge-shaped lenses. A wedge angle is necessary to prevent double images.
  • the projected image appears as a virtual image at a certain distance from the windshield, so that the driver perceives, for example, the projected navigation information as being directly in front of them on the road.
  • the radiation emitted by HUD image display devices is typically s-polarized due to the windshield's superior reflectivity compared to p-polarization.
  • polarization-selective sunglasses that do not transmit s-polarized light, they will perceive the HUD image only as weakened, if at all.
  • One solution to this problem is the use of projection systems that utilize p-polarized light.
  • DE 10 2014 220 189 A1 discloses a head-up display projection arrangement that operates with p-polarized radiation, wherein the windshield has a reflective structure that reflects p-polarized radiation towards the viewer.
  • US 20040135742 A1 also discloses a head-up display projection arrangement using p-polarized radiation that has a reflective structure.
  • WO 96/19347A3 proposes a multilayer polymer layer as the reflective structure.
  • WO 2021/145387 A1 discloses a HUD system wherein the composite lens is provided in certain areas with a reflective element for p-polarized light.
  • the reflective element can be a reflective film for p-polarized light, which is attached to the inner surface of the inner lens by means of an adhesion promoter layer, or a reflective coating for p-polarized light arranged on the inner surface of the inner lens, wherein the reflective coating comprises at least one layer of a material with a high refractive index and at least one layer of a material with a low refractive index.
  • CN 114035322 A discloses a head-up display glass comprising laminated glass, wherein the laminated glass comprises a first surface and a second surface opposite each other, the second surface comprising a display area and a non-display area, wherein the display area is provided with a first nanofilm having at least one first layer with a high refractive index and at least one first layer with a low refractive index stacked successively from the second surface outwards, wherein the refractive index of the first layer with the high refractive index is 1.9 to 2.7 and the refractive index of the first layer with the low refractive index is 1.3 to 1.8.
  • CN 117289468 A discloses a head-up display glass consisting of laminated glass and a transparent nanofilm, wherein the transparent nanofilm can reflect p-polarized light and the outermost protective layer of the transparent nanofilm is a SiZrO x layer or a SiZrMOy layer.
  • EP 4 265 411 A1 discloses a head-up display glass and a head-up display system.
  • the head-up display glass consists of an outer surface and an inner surface opposite the outer surface.
  • a transparent nanofilm, used to reflect p-polarized light, is arranged on the inner surface.
  • the transparent nanofilm comprises a first layer with a high refractive index, a second layer with a high refractive index, a first layer with a low refractive index, a third layer with a high refractive index, and a second layer with a low refractive index, stacked successively on the inner surface.
  • the refractive index of the first layer with a high refractive index, the second layer with a high refractive index, and the third layer with a high refractive index is each greater than 1.8, and the refractive index of the first layer with a low refractive index and the second layer with a low refractive index is each less than or equal to 1.8.
  • WO 2022/253659 A1 discloses a coated substrate comprising a transparent substrate provided with a p-polarized light-reflecting coating, a laminated glazing and a head-up display system comprising the coated substrate.
  • Reflective coatings can have the disadvantage of exhibiting low reflectivity for p-polarized light.
  • it is also essential to ensure that the image display device has sufficient power so that the projected image, especially in sunlight, has adequate brightness and is clearly visible to the viewer. This necessitates a larger image display device and entails a corresponding increase in power consumption.
  • WO 2022/073894 A1 discloses a vehicle windscreen for a head-up display with an outer surface facing an external environment when installed and an inner surface facing a vehicle interior, comprising at least one transparent screen, at least one masking strip in an edge area of the screen and at least one reflective layer applied by printing for reflecting light, which is arranged in the area of the masking strip on the vehicle interior side of the masking strip.
  • WO 2022/073860 A1 discloses a vehicle windscreen for a head-up display with an outer surface facing an external environment when installed and an inner surface facing a vehicle interior, comprising at least one transparent screen, at least one masking strip in an edge area of the screen and at least one light-directing device for directing light into the vehicle interior or at least one image display device for displaying image information, which is arranged in the area of the masking strip, on the vehicle interior side of the masking strip.
  • DE 10 2009 020 824 A1 discloses a virtual image system for windshields that enables the reflection of an image source on the windshield, so that a virtual image free of ghosting is visible to the driver.
  • Either a matte black material is applied to any surface of the outer glass pane or to the inner glass pane of a windshield, or a glossy black layer is applied to the windshield frit, thereby providing the virtual image for any image source with real image rays incident on the windshield surface.
  • CN 117465203 A discloses a composite screen for a head-up display in which a functional reflective element is arranged in the area of a masking, on the vehicle interior side of the masking.
  • the present invention is based on the objective of providing an improved composite disc with a reflective coating and an improved projection arrangement comprising such a composite disc.
  • the composite disc according to the invention comprises an outer disc, a thermoplastic intermediate layer, a masking layer, an inner disc, and a reflective coating.
  • the thermoplastic intermediate layer is arranged between the outer disc and the inner disc.
  • the laminated glass is designed to separate the interior of a vehicle from the outside environment within a window opening.
  • the term “inner glass” refers to the pane of the laminated glass facing the vehicle interior.
  • outer glass refers to the pane facing the outside environment.
  • the composite disc has, in particular, a top edge and a bottom edge, as well as two side edges running between them.
  • the top edge is the edge that...
  • the upper edge is designed to point upwards when installed.
  • the lower edge is the edge designed to point downwards when installed.
  • the upper edge is often also called the roof edge and the lower edge the engine edge.
  • the outer pane and the inner pane each have an outer and an inner surface, and a circumferential side edge running between them.
  • the outer surface is defined as the main surface intended to face the external environment when installed.
  • the inner surface is defined as the main surface intended to face the interior when installed.
  • the inner surface of the outer pane and the outer surface of the inner pane face each other and are connected by the thermoplastic intermediate layer.
  • the outer surface of the outer pane is designated as Side I.
  • the inner surface of the outer pane is designated as Side II.
  • the outer surface of the inner pane is designated as Side III.
  • the inner surface of the inner pane is designated as Side IV.
  • the masking layer is arranged in a first sub-area of the composite disc and the reflective coating is arranged in a second sub-area of the composite disc, wherein the second sub-area lies completely within the first sub-area when viewed perpendicularly through the composite disc.
  • the masking layer is located between the outer pane and the inner pane, or on the outer surface of the outer pane.
  • the reflective coating is arranged on the interior surface of the inner pane.
  • the reflective coating when the laminated glass is installed in a vehicle, the reflective coating has a smaller distance to the vehicle interior than the masking layer.
  • the reflective coating consists, starting from the interior surface of the inner disc, of a base layer, a functional layer and a top layer in the specified order.
  • the base layer has a refractive index greater than 1.9 and a thickness of 30 nm to 100 nm.
  • the top layer has a refractive index of less than 1.6 and a thickness of 10 nm to 150 nm and is based on silicon oxide, doped silicon oxide, magnesium fluoride or calcium fluoride.
  • the silicon oxide can be doped with materials such as aluminum, zirconium, titanium, boron, or hafnium. Doping allows for the modification of the coating's optical, mechanical, and chemical properties.
  • the functional layer arranged between the base layer and the top layer consists of optically high-refractive-index layers with a refractive index greater than 1.9 and a thickness between 50 nm and 150 nm and optically low-refractive-index layers with a refractive index less than 1.6 and a thickness of 50 nm to 150 nm, arranged in an alternating layer sequence.
  • the functional layer is arranged between the base layer and the top layer such that the alternating layer sequence of the functional layer begins with an optically high-refractive-index layer arranged immediately adjacent to the base layer and ends with an optically low-refractive-index layer arranged immediately adjacent to the top layer.
  • the functional layer has at least three optically high refractive index layers and at least three optically low refractive index layers.
  • the functional layer is therefore a stack of n optically high-refractive-index layers with a refractive index greater than 1.9 and a thickness between 50 nm and 150 nm and n optically low-refractive-index layers with a refractive index less than 1.6 and a thickness of 50 nm to 150 nm, where n is a natural number greater than or equal to 3 and where the stack starts with an optically high-refractive-index layer and ends with an optically low-refractive-index layer.
  • the functional layer consists of three optically high refractive index layers and three optically low refractive index layers.
  • the functional layer consists of four optically high refractive index layers and four optically low refractive index layers.
  • the functional layer consists of five optically high refractive index layers and five optically low refractive index layers.
  • the functional layer can also consist of more than five optically high-refractive layers and more than five optically low-refractive layers, where the number of optically high-refractive layers always corresponds to the number of optically low-refractive layers and vice versa.
  • the refractive index of the optically low-refractive-index layers of the functional layer is preferably at most 1.5, particularly preferably at most 1.45.
  • the refractive index of the optically low-refractive-index layers is 1.45. This value has proven to be particularly advantageous with regard to the reflection properties of the composite disk.
  • the individual low-refractive-index layers of the functional layer can be based on different materials or all on the same material. Suitable materials include, for example, silicon dioxide, doped silicon dioxide, magnesium fluoride, or calcium fluoride. Preferably, the low-refractive-index layers of the functional layer are all based on silicon dioxide, doped silicon dioxide, magnesium fluoride, or calcium fluoride.
  • the silicon dioxide can be doped with, for example, aluminum, zirconium, titanium, boron, or hafnium. Doping allows for the adjustment of the optical, mechanical, and chemical properties of the coating.
  • the individual low-refractive-index layers of the functional layer are all on the same material.
  • the individual optically low-refractive-index layers of the functional layer can have different thicknesses or all be the same thickness.
  • the individual optically low-refractive-index layers of the functional layer all have substantially the same thickness.
  • three or more layers have the following: Essentially the same thickness is achieved if the thicknesses of the individual layers do not differ from each other by more than 5%.
  • the base layer preferably has a thickness of 50 nm to 80 nm.
  • the base layer contains or consists of silicon nitride, a silicon-zirconium mixed nitride, or titanium oxide.
  • the silicon nitride, silicon-zirconium mixed nitride, or titanium oxide can be undoped or doped, for example with aluminum, zirconium, titanium, boron, or hafnium.
  • the individual high-refractive-index layers of the functional layer can be based on different materials or all be made of the same material. Suitable materials include silicon nitride, silicon-zirconium mixed nitride, or titanium oxide.
  • the silicon nitride, silicon-zirconium mixed nitride, or titanium oxide can be undoped or doped, for example, with aluminum, zirconium, titanium, boron, or hafnium.
  • the individual high-refractive-index layers of the functional layer are all made of the same material.
  • the individual optically high-refractive-index layers of the functional layer can have different thicknesses or all be the same thickness. Preferably, the individual optically high-refractive-index layers of the functional layer all have essentially the same thickness.
  • the base layer and/or the optically high-refractive layers can therefore independently contain or consist of silicon nitride, a silicon-zirconium mixed nitride or titanium oxide, which may be undoped or doped.
  • the top layer has a thickness of 20 nm to 140 nm.
  • Refractive indices are generally specified within the scope of the present invention with reference to a wavelength of 550 nm. Methods for determining refractive indices are known to those skilled in the art. The refractive indices specified within the scope of the invention can, for example, be determined by ellipsometry, using commercially available ellipsometers. Unless otherwise specified, the specification of layer thicknesses or thicknesses refers to the geometric thickness of a layer.
  • the reflective coating is preferably applied essentially in the form of a quadrilateral, particularly preferably in the form of a rectangle, a parallelogram, or a trapezoid, extending in an area near the lower edge between the two side edges of the composite disc. Particularly preferably, the edges of the reflective coating do not extend to the side edges and the lower edge of the composite disc, but are, for example, spaced 2 cm to 5 cm away from them.
  • the reflective coating is arranged in a second sub-area of the laminated glass, as described above.
  • the reflective coating therefore does not extend over the entire laminated glass. Consequently, the reflective coating is smaller in its external dimensions, i.e., its width and length, than the outer and inner panes of the laminated glass.
  • the reflective coating preferably extends over a maximum of 30%, and more preferably over a maximum of 20%, of the laminated glass.
  • a masking layer is arranged in a first sub-area of the composite glass.
  • the masking layer is arranged in an edge region of the composite glass, which typically borders the edge of the glass.
  • the masking layer is preferably arranged at least along and adjacent to the lower edge. In one embodiment, this results in a rectangular strip arranged along the lower edge when viewed from above.
  • the shape of the masking layer is not limited to a rectangular shape; it can also have other shapes.
  • the masking layer is formed in a frame-like circumferential shape.
  • the frame-shaped masking layer is preferably provided with a widening, i.e., it has a greater width (dimension perpendicular to its extent) than in other sections. In this way, the masking layer can be appropriately adapted to the desired dimensions of the reflective coating.
  • the masking layer is thus formed in a frame-like circumferential shape and has a greater width, in particular in a section that overlaps the reflective coating, than in sections different from this.
  • a frame-shaped, circumferential masking layer is preferably used to mask the bonding of the laminated glass, for example, as a windshield in a vehicle body. This ensures a harmonious overall appearance of the laminated glass when installed. Furthermore, such a masking layer provides UV protection for the adhesive material used.
  • An advantage of the invention is that the reflective coating is applied to the interior surface of the inner pane.
  • the surface on which the masking layer is to be placed can be freely selected according to customer requirements.
  • a reflective coating applied to the exterior surface of the inner pane or the interior surface of the outer pane could be obscured by a masking print located further towards the vehicle interior. This is avoided by the design according to the invention.
  • the masking layer according to the invention is a layer that prevents visibility through the composite pane.
  • the masking layer allows a transmission of at most 5%, preferably at most 2%, particularly preferably at most 1%, and especially at most 0.1% of the visible spectrum light.
  • the masking layer is therefore opaque, preferably black.
  • the masking layer is preferably a coating consisting of one or more layers.
  • the masking layer can also be a colored area of the thermoplastic intermediate layer.
  • the masking layer consists of a single layer. This has the advantage of particularly simple and cost-effective manufacturing of the composite disc, since only a single layer needs to be formed for the masking layer.
  • the masking layer consists in particular of an opaque cover print made of a dark, preferably black, enamel.
  • the masking layer is designed as an opaque covering print arranged on the interior surface of the outer pane, in particular made of a dark, preferably black, enamel.
  • the masking layer is designed as an opaque cover print arranged on the outer surface of the inner disc, in particular made of a dark, preferably black, enamel.
  • the masking layer is designed as an opaque cover print arranged on the outer surface of the outer disc, in particular made of a dark, preferably black, enamel.
  • the masking layer is formed as an opaquely colored region of the thermoplastic interlayer.
  • the thermoplastic interlayer is formed in one piece and is opaquely colored in one region.
  • a masking layer formed as an opaquely colored region of the thermoplastic interlayer can also be realized by using a thermoplastic interlayer composed of an opaque thermoplastic film and a transparent thermoplastic film.
  • the opaque thermoplastic film and the transparent thermoplastic film are preferably arranged offset from one another so that the two films do not overlap when viewed through the laminated glass.
  • the transparent and the opaque thermoplastic film are made of the same plastic or preferably contain the same plastic.
  • the materials on which the opaque thermoplastic film and the transparent thermoplastic film can be based are those that are also described for the thermoplastic interlayer.
  • the opaque thermoplastic film is preferably a colored film that can have various colors, in particular black.
  • the composite disc according to the invention is preferably curved in one or more directions in space, as is common for automotive windshields, with typical radii of curvature ranging from about 10 cm to about 40 m.
  • the composite disc It can also be flat, for example if it is intended as a disc for buses, trains or tractors.
  • the thermoplastic interlayer which connects the outer pane to the inner pane, contains at least one thermoplastic polymer, preferably ethylene vinyl acetate (EVA), polyvinyl butyral (PVB), or polyurethane (PU), or mixtures, copolymers, or derivatives thereof, particularly preferably PVB.
  • the thermoplastic interlayer is typically formed from a thermoplastic film (bonding film).
  • the thickness of the thermoplastic interlayer is preferably from 0.2 mm to 2 mm, particularly preferably from 0.3 mm to 1 mm, for example, 760 pm or 848 pm.
  • the thermoplastic interlayer can be formed from a single film or from more than one film.
  • the thermoplastic interlayer can also be a film with functional properties, for example, a film with acoustic damping properties.
  • the outer pane and inner pane preferably contain or consist of glass, particularly preferably flat glass, float glass, quartz glass, borosilicate glass, soda-lime glass, aluminosilicate glass, or clear plastics, preferably rigid clear plastics, in particular polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, polystyrene, polyamide, polyester, polyvinyl chloride and/or mixtures thereof.
  • glass particularly preferably flat glass, float glass, quartz glass, borosilicate glass, soda-lime glass, aluminosilicate glass, or clear plastics, preferably rigid clear plastics, in particular polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, polystyrene, polyamide, polyester, polyvinyl chloride and/or mixtures thereof.
  • the outer and inner panes can be clear and colorless, or tinted or colored.
  • the outer and inner panes can be independently unstressed, partially stressed, or stressed. If at least one pane is to have a prestress, this can be thermal or chemical.
  • the composite glass according to the invention is preferably designed as a windshield.
  • the total transmission through the windshield is greater than 70% in the main viewing area (light type A).
  • the term total transmission refers to the method for testing the light transmittance of motor vehicle windows specified in ECE-R 43, Annex 3, Section 9.1.
  • the first sub-area of the composite pane, in which the masking layer is arranged is located outside the main viewing area of the composite pane.
  • the outer and inner panes can have suitable coatings known per se, for example anti-reflective coatings, non-stick coatings, anti-scratch coatings, photocatalytic coatings or sun protection coatings or low-E coatings.
  • the thickness of the outer and inner panes can vary widely and thus be adapted to the specific requirements.
  • the outer and inner panes have thicknesses of 0.5 mm to 5 mm, more preferably 1 mm to 3 mm, and most preferably 1.6 mm to 2.1 mm.
  • the outer pane has a thickness of 2.1 mm and the inner pane a thickness of 1.6 mm.
  • the outer pane, or in particular the inner pane can also be made of thin glass with a thickness of, for example, 0.55 mm.
  • the composite pane according to the invention can comprise one or more additional intermediate layers, in particular functional intermediate layers.
  • An additional intermediate layer can, in particular, be an intermediate layer with acoustic damping properties, an infrared radiation-reflecting intermediate layer, an infrared radiation-absorbing intermediate layer, a UV radiation-absorbing intermediate layer, an intermediate layer that is at least partially colored, and/or an intermediate layer that is at least partially tinted. If several additional intermediate layers are present, they can also have different functions.
  • the additional intermediate layers are preferably arranged between the inner pane and the outer pane.
  • the invention also relates to a projection arrangement comprising at least a composite disk according to the invention and an imaging unit directed towards the reflective coating which emits p-polarized light, wherein the interior surface of the inner disk is the surface of the inner disk closest to the imaging unit.
  • a projection arrangement thus also comprises at least a composite disk, comprising at least
  • a reflective coating arranged on the inner surface of the inner pane, wherein the reflective coating is arranged in a second sub-area of the composite pane which, when viewed perpendicularly through the composite pane, lies entirely within the first sub-area, and the reflective coating is arranged in the specified sequence starting from the inner surface of the inner pane
  • a functional layer consisting of optically high-refractive-index layers with a refractive index greater than 1.9 and a thickness between 50 nm and 150 nm arranged in an alternating layer sequence and optically low-refractive-index layers with a refractive index less than 1.6 and a thickness of 50 nm to 150 nm
  • alternating layer sequence of the functional layer begins with an optically high refractive index layer arranged immediately adjacent to the base layer and ends with an optically low refractive index layer arranged immediately adjacent to the top layer, and the functional layer has at least three optically high refractive index layers and at least three optically low refractive index layers.
  • the combination of the reflective coating with the masking layer behind it ensures good image visibility in a projection arrangement according to the invention, even in direct sunlight and when using low-luminosity imaging units. Even under these circumstances, the image generated by the imaging unit appears bright and is clearly recognizable. This allows for a reduction in the power consumption of the imaging unit and thus lower energy consumption.
  • the reflective coating is arranged in a second sub-area of the laminated glass, which, when viewed perpendicularly through the laminated glass, lies entirely within the first sub-area containing the opaque masking layer, the reflective coating has no section that is not overlapping with the masking layer.
  • the reflective coating is only present where, when viewed through the laminated glass from the inside, it is located in front of the masking layer. From the perspective of a vehicle occupant, the reflective layer is thus spatially located in front of the masking layer. The area of the laminated glass in which the reflective coating is located therefore appears opaque.
  • viewed perpendicularly through the laminated glass means that the view is through the laminated glass from the inside, i.e., the interior surface of the inner pane is the surface of the inner pane closest to the viewer.
  • spatially in front means that the reflective coating is located further away from the exterior surface of the outer pane than the masking layer.
  • the masking layer is widened at least in the area that overlaps with the reflective coating. This means that, viewed perpendicular to the nearest section of the circumferential edge of the composite disc, the masking layer has a greater width in this area than in other sections.
  • the imaging unit serves to project an image and can therefore also be called a projector, display device, or image display device.
  • a display or other device known to those skilled in the art can be used as the imaging unit.
  • the imaging unit is a display, particularly preferably an LCD display, LED display, OLED display, or electroluminescent display, especially an LCD display. Displays have a low profile and are therefore easy and space-saving to integrate into the dashboard of a vehicle. Furthermore, displays are significantly more energy-efficient to operate compared to other imaging units. The comparatively lower brightness of displays is entirely sufficient in the combination of the reflective coating with the masking layer behind it, as described in the invention.
  • the imaging unit emits p-polarized light.
  • the radiation from the imaging unit preferably strikes the composite disc in the area of the reflective coating at an angle of incidence of 55° to 80°, more preferably 62° to 77°.
  • the angle of incidence is the angle between the incident vector of the radiation from the imaging unit and the surface normal at the geometric center of the second sub-area of the composite disc, in which the reflective coating is arranged as described above.
  • the p-polarized light emitted by the imaging unit strikes the reflective coating and is reflected there.
  • the light reflected by the reflective coating is predominantly visible light, i.e., light in a wavelength range of approximately 380 nm to 780 nm.
  • the reflective element reflects at least 30%, particularly preferably at least 40%, and most preferably at least 45% of the p-polarized light incident on the reflective coating in a wavelength range of 450 nm to 650 nm and an angle of incidence of 65°.
  • p-polarized light refers to light from the visible spectral range that consists predominantly of light exhibiting p-polarization.
  • the p-polarized light preferably has a p-polarization component of greater than or equal to 50%, more preferably greater than or equal to 70%, particularly preferably greater than or equal to 90%, and especially approximately 100%.
  • the polarization direction is specified with respect to the plane of incidence of the radiation on the composite disk.
  • P-polarized radiation is defined as radiation whose electric field oscillates in the plane of incidence.
  • S-polarized radiation is defined as radiation whose electric field oscillates perpendicular to the plane of incidence.
  • the plane of incidence is defined by the incidence vector and the surface normal of the composite disk at the geometric center of the irradiated area.
  • the polarization, and in particular the proportion of p- and s-polarized radiation is determined at a point within the area irradiated by the imaging unit, preferably at the geometric center of the irradiated area. Since composite discs can be curved (for example, if they are designed as a windshield), which affects the plane of incidence of the radiation from the imaging unit, slightly different polarization components can occur in the other areas, which is unavoidable for physical reasons.
  • reflective coatings consisting of a base layer with a refractive index greater than 1.9 and a thickness of 30 nm to 100 nm, a functional layer, and a top layer with a refractive index less than 1.6 and a thickness of 10 nm to 150 nm, which is based on silicon oxide, doped silicon oxide, magnesium fluoride, or calcium fluoride, wherein the functional layer consists of optically high-refractive-index layers with a refractive index greater than 1.9 and a thickness between 50 nm and 150 nm and optically low-refractive-index layers with a refractive index less than 1.6 and a thickness of 50 nm to 150 nm arranged in an alternating layer sequence, and wherein the alternating layer sequence of the functional layer begins with an optically high-refractive-index layer arranged immediately adjacent to the base layer and ends with an optically low-refractive-index layer arranged immediately adjacent to the top layer, and wherein the functional layer has
  • the combination of the reflective coating with the masking layer behind it ensures good image visibility, even in direct sunlight, with occupants wearing sunglasses, and when using low-intensity imaging units. Even under these conditions, the image generated by the imaging unit appears bright and is clearly recognizable. This allows for a reduction in the power consumption of the imaging unit and thus lowers energy usage.
  • the preferred embodiments of the composite disk according to the invention described above also apply accordingly to the projection arrangement according to the invention comprising a composite disk according to the invention and an imaging unit and vice versa.
  • the laminated glass pane can be manufactured using methods known per se.
  • the outer and inner panes are laminated together via the intermediate layer, for example by autoclave processes, vacuum bag processes, vacuum ring processes, calender processes, vacuum laminators, or combinations thereof.
  • the bonding of the outer and inner panes typically occurs under the influence of heat, vacuum, and/or pressure.
  • the application of the reflective coating layers i.e., the base layer, the individual low-refractive-index layers, the high-refractive-index layers of the functional layer, and the top layer, can be carried out using well-known coating processes such as magnetron sputtering or wet coating. Alternatively, application can also be carried out using a digital printing process.
  • the top layer and/or the optically low refractive layers of the functional layer can also be based on nanoporous silicon oxide and applied using a sol-gel process.
  • the reflective coating can be applied before or after lamination. Application before lamination and any bending processes is preferred, as coatings are easier to apply to flat substrates and result in better quality.
  • a partial coating can be achieved through masking techniques or by subsequently removing part of the coating (for example, by laser radiation or mechanical abrasion).
  • a partial coating is achieved by applying the sol only to the desired area, for example, by pad printing, screen printing, partial application using rollers or brushes, or by spray coating, or also by masking techniques.
  • digital printing processes a partial coating is achieved by printing the layer only on the desired area. Therefore, masking techniques can generally be omitted in digital printing processes.
  • the outer pane and the inner pane are preferably coated before lamination and preferably after any coating processes.
  • the glass is subjected to a bending process.
  • the outer and inner panes are bent congruently together (i.e., simultaneously and using the same tool) because this ensures that the shape of the panes is optimally matched for subsequent lamination.
  • Typical temperatures for glass bending processes range from 500°C to 700°C.
  • the invention also relates to the use of a composite disc according to the invention as a vehicle window in means of transport for traffic on land, in the air or on water, in particular in motor vehicles and in particular as a windscreen for a head-up display.
  • Fig. 1 shows a top view of an embodiment of a composite disc according to the invention.
  • Fig. 2 shows a cross-section through the embodiment shown in Fig. 1,
  • Fig. 3 shows a cross-section through an embodiment of a functional layer
  • Fig. 4 shows a cross-section through a further embodiment of a functional layer
  • Fig. 5 shows a cross-section through a further embodiment of a functional layer
  • Fig. 6 shows a cross-section through a further embodiment of a composite disc according to the invention
  • Fig. 7 shows a cross-section through another embodiment of a composite disk according to the invention
  • Fig. 8 shows a cross-section through another embodiment of a composite disk according to the invention
  • Fig. 9 shows a top view of another embodiment of a composite disc according to the invention.
  • Fig. 10 shows a cross-section through the embodiment shown in Fig. 9, Fig. 11 shows a cross-section through another embodiment of a composite disk according to the invention
  • Fig. 12 shows a cross-section through another embodiment of a composite disk according to the invention
  • Fig. 13 shows a cross-section through another embodiment of a composite disk according to the invention
  • Fig. 14 shows a cross-section through an embodiment of a projection arrangement according to the invention
  • Fig. 16 Reflection spectra of composite disks against p-polarized radiation at an angle of incidence of 70°.
  • Fig. 1 shows a top view of an embodiment of a composite disc 100 according to the invention
  • Fig. 2 shows the cross-section through the composite disc 100 shown in Fig. 1 along the section line X'-X.
  • the composite disc 100 shown in Figs. 1 and 2 has a top edge O, a bottom edge U, and two side edges S and comprises an outer disc 1 with an outer surface I and an inner surface II, an inner disc 2 with an outer surface III and an inner surface IV, a thermoplastic intermediate layer 3, and a reflective coating 5 consisting of a base layer 6, a functional layer 7, and a top layer 8.
  • the thermoplastic intermediate layer 3 is arranged between the outer disc 1 and the inner disc 2.
  • the outer disc 1, the thermoplastic intermediate layer 3, and the inner disc 2 are arranged one above the other over their entire surface.
  • the masking layer 4 is arranged between the outer pane 1 and the inner pane 2 in a first sub-region A of the composite pane 100.
  • the masking layer 4 is designed as an opaque covering print arranged on the inner surface II of the outer pane 1 and is located only in an edge region of the composite pane 100 bordering the lower edge U.
  • the masking layer 4 is shown as patterned in Figure 1 instead of black.
  • the reflective coating 5 is arranged in a second sub-region B of the composite pane 100, which, when viewed perpendicularly through the composite pane 100, lies entirely within the first sub-region A. The reflective coating 5 is therefore smaller in its external dimensions than the inner pane 2.
  • the reflective coating 5 consists in the specified order of a base layer 6, a functional layer 7 and a top layer 8.
  • the thermoplastic interlayer 3 contains, for example, PVB and has a thickness of 0.76 mm.
  • the outer pane 1 is made of, for example, soda-lime glass and is 2.1 mm thick.
  • the inner pane 2 is made of, for example, soda-lime glass and is 1.6 mm thick.
  • Base layer 6 has a refractive index greater than 1.9 and a thickness of 30 nm to 100 nm.
  • base layer 6 consists of titanium dioxide and has a thickness of 55 nm.
  • Base layer 6 can also be, for example, 52 nm or 45 nm thick.
  • the top layer 8 has a refractive index of less than 1.6 and a thickness of 10 nm to 150 nm and is based on silicon dioxide, doped silicon dioxide, magnesium fluoride, or calcium fluoride.
  • the top layer 8 is a 40 nm thick silicon dioxide layer.
  • the top layer 8 can also be, for example, 120 nm or 132 nm thick.
  • the functional layer 7 consists of at least three optically high-refractive-index layers 9 with a refractive index greater than 1.9 and a thickness between 50 nm and 150 nm, and at least three optically low-refractive-index layers 10 with a refractive index less than 1.6 and a thickness of 50 nm to 150 nm, arranged in an alternating layer sequence.
  • the functional layer 7 is arranged between the base layer 6 and the top layer 8 such that the alternating layer sequence of the functional layer 7 begins with an optically high-refractive-index layer 9 arranged immediately adjacent to the base layer 6 and ends with an optically low-refractive-index layer 10 arranged immediately adjacent to the top layer 8.
  • the functional layer 7 is designed, for example, as shown in Fig. 3, Fig. 4 or Fig. 5.
  • the masking layer 4 extends between the two side edges S of the composite disc 100 and has, for example, a width of 30 cm starting from the lower edge U of the composite disc 100.
  • the composite disc 100 can have any suitable geometric shape and/or curvature.
  • the composite disc 100 is a curved composite disc.
  • Fig. 3 shows a cross-section through an embodiment of a functional layer 7.
  • the functional layer 7 consists of three optically high-refractive-index layers 9 and three optically low-refractive-index layers 10 in an alternating layer sequence.
  • the second optically high refractive layer 9.2 and the third optically high refractive layer 9.3 each a titanium dioxide layer with a thickness of 65 nm and a refractive index of 2.45 and the first optically low refractive layer 10.1, the second optically low refractive layer 10.2 and the third optically low refractive layer 10.3 each a silicon dioxide layer with a thickness of 98 nm and a refractive index of 1.45.
  • Fig. 4 shows a cross-section through another embodiment of a functional layer 7.
  • the functional layer 7 consists of four optically high-refractive-index layers 9 and four optically low-refractive-index layers 10 in an alternating layer sequence.
  • the second high-refractive-index layer 9.2, the third high-refractive-index layer 9.3 and the fourth high-refractive-index layer 9.4 each a titanium dioxide layer with a thickness of 65 nm and a refractive index of 2.45 and the first low-refractive-index layer 10.1, the second low-refractive-index layer 10.2, the third low-refractive-index layer 10.3 and the fourth low-refractive-index layer 10.4 each a silicon dioxide layer with a thickness of 100 nm and a refractive index of 1.45.
  • Fig. 5 shows a cross-section through another embodiment of a functional layer 7.
  • the functional layer 7 consists of five optically high-refractive-index layers 9 and five optically low-refractive-index layers 10 in an alternating layer sequence.
  • the second high-refractive-index layer 9.2, the third high-refractive-index layer 9.3, the fourth high-refractive-index layer 9.4 and the fifth high-refractive-index layer 9.5 each a titanium dioxide layer with a thickness of 65 nm and a refractive index of 2.45
  • the fourth optically low refractive layer 10.4 and the fifth optically low refractive layer 10.5 are each a silicon dioxide layer with a thickness of 105 nm and a refractive index of 1.45.
  • Fig. 6 shows a cross-section through a further embodiment of a composite disc 100 according to the invention.
  • the embodiment shown in cross-section in Fig. 6 differs from that shown in Fig. 2 only in that the masking layer 4 is not designed as an opaque covering print arranged on the inner surface II of the outer disc 1, but as an opaque covering print arranged on the outer surface III of the inner disc 2.
  • Fig. 7 shows a cross-section through another embodiment of a composite disc 100 according to the invention.
  • the embodiment shown in cross-section in Fig. 7 differs from that shown in Fig. 2 only in that the masking layer 4 is not designed as an opaque covering print arranged on the inner surface II of the outer disc 1, but as an opaque covering print arranged on the outer surface I of the outer disc 1.
  • Fig. 8 shows a cross-section through another embodiment of a composite disc 100 according to the invention.
  • the embodiment shown in cross-section in Fig. 8 differs from that shown in Fig. 2 only in that the masking layer 4 is not designed as an opaque covering print arranged on the inner surface II of the outer disc 1, but is designed as an opaquely colored area of the thermoplastic intermediate layer 3.
  • Fig. 9 shows a top view of another embodiment of a composite disc 100 according to the invention
  • Fig. 10 shows the cross-section through the composite disc 100 shown in Fig. 9 along the section line Y'-Y.
  • the composite disc 100 shown in Figs. 9 and 10 has a top edge O, a bottom edge U, and two side edges S and comprises an outer disc 1 with an outer surface I and an inner surface II, an inner disc 2 with an outer surface III and an inner surface IV, a thermoplastic intermediate layer 3, a masking layer 4, and a reflective coating 5 consisting of a base layer 6, a functional layer 7, and a top layer 8.
  • the thermoplastic intermediate layer 3 is arranged between the outer disc 1 and the inner disc 2.
  • the outer disc 1, The thermoplastic intermediate layer 3 and the inner pane 2 are arranged overlapping over their entire surface.
  • the masking layer 4 is arranged between the outer pane 1 and the inner pane 2 in a first sub-region A of the composite pane 100.
  • the masking layer 4 is designed as an opaque covering print arranged on the inner surface II of the outer pane 1 and is arranged in a circumferential edge region of the composite pane 100. This edge region has a greater width in a section overlapping the reflective coating 5 than in other sections.
  • the masking layer 4 is shown as patterned in Figure 9 instead of black.
  • the reflective coating 5 is arranged in a second sub-region B of the composite pane 100, which, when viewed perpendicularly through the composite pane 100, lies entirely within the first sub-region A.
  • the reflective coating 5 is therefore smaller in its external dimensions than the inner pane 2.
  • the reflective coating 5 consists in the specified order of a base layer 6, a functional layer 7 and a top layer 8.
  • the thermoplastic interlayer 3 contains, for example, PVB and has a thickness of 0.76 mm.
  • the outer pane 1 is made of, for example, soda-lime glass and is 2.1 mm thick.
  • the inner pane 2 is made of, for example, soda-lime glass and is 1.6 mm thick.
  • Base layer 6 has a refractive index greater than 1.9 and a thickness of 30 nm to 100 nm.
  • base layer 6 consists of titanium dioxide and has a thickness of 55 nm.
  • Base layer 6 can also be, for example, 52 nm or 45 nm thick.
  • the top layer 8 has a refractive index of less than 1.6 and a thickness of 10 nm to 150 nm and is based on silicon dioxide, doped silicon dioxide, magnesium fluoride, or calcium fluoride.
  • the top layer 8 is a 40 nm thick silicon dioxide layer.
  • the top layer 8 can also be, for example, 120 nm or 132 nm thick.
  • the functional layer 7 consists of at least three optically high-refractive-index layers 9 arranged in an alternating layer sequence, each with a refractive index greater than 1.9. and a thickness between 50 nm and 150 nm and at least three optically low-refractive-index layers 10 with a refractive index less than 1.6 and a thickness of 50 nm to 150 nm.
  • the functional layer 7 is arranged between the base layer 6 and the top layer 8 such that the alternating layer sequence of the functional layer 7 begins with an optically high-refractive-index layer 9 arranged immediately adjacent to the base layer 6 and ends with an optically low-refractive-index layer 10 arranged immediately adjacent to the top layer 8.
  • the functional layer 7 is designed, for example, as shown in Fig. 3, Fig. 4 or Fig. 5.
  • the composite disc 100 can have any suitable geometric shape and/or curvature.
  • the composite disc 100 is a curved composite disc.
  • Fig. 11 shows a cross-section through another embodiment of a composite disc 100 according to the invention.
  • the embodiment shown in cross-section in Fig. 11 differs from that shown in Fig. 10 only in that the masking layer 4 is not designed as an opaque covering print arranged on the inner surface II of the outer disc 1, but as an opaque covering print arranged on the outer surface III of the inner disc 2.
  • Fig. 12 shows a cross-section through another embodiment of a composite disc 100 according to the invention.
  • the embodiment shown in cross-section in Fig. 12 differs from that shown in Fig. 10 only in that the masking layer 4 is not designed as an opaque covering print arranged on the inner surface II of the outer disc 1, but is designed as an opaquely colored area of the thermoplastic intermediate layer 3.
  • Fig. 13 shows a cross-section through another embodiment of a composite disc 100 according to the invention.
  • the embodiment shown in cross-section in Fig. 13 differs from that shown in Fig. 10 only in that the masking layer 4 is not designed as an opaque covering print arranged on the inner surface II of the outer disc 1, but as an opaque covering print arranged on the outer surface I of the outer disc 1.
  • Fig. 14 shows a cross-section through an embodiment of a projection arrangement 101 according to the invention.
  • the projection arrangement 101 shown in Fig. 14 comprises a composite screen 100 and an imaging unit 11.
  • the composite screen 100 is configured as shown in Fig. 2. It is understood that the composite screen can alternatively also be configured as shown in Figs.
  • the projection arrangement 101 has an imaging unit 11.
  • the imaging unit 11 serves to generate p-polarized light (image information), which is directed onto the reflective coating 5 and is reflected by the reflective coating 5 as reflected light into the vehicle interior, where it can be perceived by an observer, e.g., the driver.
  • the light preferably strikes the reflective element at an angle of incidence of 55° to 80°, particularly 62° to 77°.
  • the imaging unit 11 is, for example, a display, in particular an LCD display.
  • inventive example E the functional layer 7 was configured as shown in Fig. 3.
  • inventive example F the functional layer 7 was configured as shown in Fig. 4.
  • inventive example G the functional layer 7 was configured as shown in Fig. 5.
  • thermoplastic intermediate layer 3 was used as a thermoplastic intermediate layer 3 in comparison examples C and D and in the examples according to the invention E, F, and G. Table 1
  • the reflectance which is crucial for image quality, for p-polarized light is denoted as RL(A) p-pol.
  • the reflectance describes the proportion of the total incident p-polarized radiation that is reflected. It is expressed as a dimensionless number from 0 to 1 (normalized to the incident radiation). Plotted as a function of wavelength, it forms the reflection spectrum.
  • the reflectance values refer to a Reflectance measurement with a light source of type A emitting in the spectral range from 380 nm to 780 nm with a normalized irradiance of 1.
  • the spectral range from 450 nm to 650 nm is particularly interesting because conventional imaging units 11 of a projection arrangement 101 use radiation in this range (RGB: 473 nm, 550 nm, 630 nm). Irradiation was performed via the inner disk 2 (so-called interior reflection).
  • the corresponding reflection spectra of comparison examples C and D and examples E, F, and G at an incidence angle of 65° are shown in Fig. 15.
  • the corresponding reflection spectra of comparison example D and examples E, F, and G at an incidence angle of 70° are shown in Fig. 16.
  • the reflectance at an angle of incidence of 65° for examples E, F, and G according to the invention is significantly higher at the wavelengths of 473 nm, 550 nm, and 630 nm commonly used by imaging units than the reflectance for comparison examples C and D at these wavelengths.
  • the average reflectance over the spectral range from 450 nm to 650 nm is also higher in each case (0.45 for example E, 0.56 for example F, and 0.66 for example G) than the average reflectance over the same spectral range (0.17 for comparison example C and 0.25 for comparison example D).
  • the reflectance at an angle of incidence of 70° for examples E, F, and G according to the invention is significantly higher at the wavelengths of 473 nm, 550 nm, and 630 nm commonly used by imaging units than the reflectance for comparative example D at these wavelengths.
  • the average reflectance over the spectral range from 450 nm to 650 nm is also higher in each case (0.47 for example E, 0.52 for example F, and 0.63 for example G) than the average reflectance over the same spectral range (0.30) for comparative example D.

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Abstract

La présente invention se rapporte à une vitre composite (100) comprenant au moins : une vitre extérieure (1) et une vitre intérieure (2), qui sont reliées l'une à l'autre au moyen d'une couche intermédiaire thermoplastique (3) ; une couche de masquage (4) disposée dans une première sous-région (A) de la vitre composite (100) ; et un revêtement réfléchissant (5) disposé sur la surface côté intérieur (IV) de la vitre intérieure (2), le revêtement réfléchissant (5) étant disposé dans une seconde sous-région (B) de la vitre composite (100) qui, dans une vue perpendiculaire à travers la vitre composite (100), se trouve complètement dans la première sous-région (A). À partir de la surface côté intérieur (IV) de la vitre intérieure (2), le revêtement réfléchissant (5) consiste, dans l'ordre spécifié, en : une couche de base (6) ayant un indice de réfraction supérieur à 1,9 et une épaisseur de 30 nm à 100 nm ; une couche fonctionnelle (7) constituée, dans une séquence de couches alternées, de couches à réfraction optiquement élevée (9) ayant un indice de réfraction supérieur à 1,9 et une épaisseur comprise entre 50 nm et 150 nm et des couches à réfraction optiquement faible (10) ayant un indice de réfraction inférieur à 1,6 et une épaisseur de 50 nm à 150 nm ; et une couche de recouvrement (8) ayant un indice de réfraction inférieur à 1,6 et une épaisseur de 10 nm à 150 nm, la couche de recouvrement étant à base d'oxyde de silicium, d'oxyde de silicium dopé, de fluorure de magnésium ou de fluorure de potassium. La séquence de couches alternées de la couche fonctionnelle (7) commence par une couche à réfraction optiquement élevée (9) immédiatement adjacente à la couche de base (6) et se termine par une couche à réfraction optiquement faible (10) immédiatement adjacente à la couche de recouvrement (8), et la couche fonctionnelle (7) comprend au moins trois couches à réfraction optiquement élevée (9) et au moins trois couches à réfraction optiquement faible (10).
PCT/EP2025/061702 2024-05-06 2025-04-29 Vitre composite ayant un revêtement réfléchissant fourni en parties Pending WO2025233179A1 (fr)

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EP24174330.1 2024-05-06

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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996019347A2 (fr) 1994-12-20 1996-06-27 Minnesota Mining And Manufacturing Company Film optique multicouche
US20040135742A1 (en) 2002-12-31 2004-07-15 Weber Michael F. Head-up display with polarized light source and wide-angle p-polarization reflective polarizer
DE102009020824A1 (de) 2008-05-27 2010-02-04 GM Global Technology Operations, Inc., Detroit Virtuelles Bildsystem für Windschutzscheiben
DE102014220189A1 (de) 2014-10-06 2016-04-07 Continental Automotive Gmbh Head-Up-Display und Verfahren zur Erzeugung eines virtuellen Bilds mittels eines Head-Up-Displays
WO2021122848A1 (fr) 2019-12-16 2021-06-24 Agc Glass Europe Système d'affichage tête haute
WO2021145387A1 (fr) 2020-01-15 2021-07-22 Ａｇｃ株式会社 Système d'affichage tête haute
CN114035322A (zh) 2021-10-21 2022-02-11 福耀玻璃工业集团股份有限公司 一种抬头显示玻璃及其抬头显示系统
WO2022073894A1 (fr) 2020-10-05 2022-04-14 Saint-Gobain Glass France Vitre de véhicule pour affichage tête haute
WO2022073860A1 (fr) 2020-10-05 2022-04-14 Saint-Gobain Glass France Vitre de véhicule pour affichage tête haute
WO2022253659A1 (fr) 2021-06-02 2022-12-08 Agc Glass Europe Système d'affichage tête haute
EP4265411A1 (fr) 2022-05-19 2023-10-25 Fuyao Glass Industry Group Co., Ltd. Verre d'affichage tête haute et système d'affichage tête haute
CN117289468A (zh) 2023-11-03 2023-12-26 福耀玻璃工业集团股份有限公司 抬头显示玻璃及抬头显示系统
CN117465203A (zh) 2023-10-27 2024-01-30 福耀玻璃工业集团股份有限公司 黑边显示车窗与车辆

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996019347A2 (fr) 1994-12-20 1996-06-27 Minnesota Mining And Manufacturing Company Film optique multicouche
US20040135742A1 (en) 2002-12-31 2004-07-15 Weber Michael F. Head-up display with polarized light source and wide-angle p-polarization reflective polarizer
DE102009020824A1 (de) 2008-05-27 2010-02-04 GM Global Technology Operations, Inc., Detroit Virtuelles Bildsystem für Windschutzscheiben
DE102014220189A1 (de) 2014-10-06 2016-04-07 Continental Automotive Gmbh Head-Up-Display und Verfahren zur Erzeugung eines virtuellen Bilds mittels eines Head-Up-Displays
WO2021122848A1 (fr) 2019-12-16 2021-06-24 Agc Glass Europe Système d'affichage tête haute
WO2021145387A1 (fr) 2020-01-15 2021-07-22 Ａｇｃ株式会社 Système d'affichage tête haute
WO2022073860A1 (fr) 2020-10-05 2022-04-14 Saint-Gobain Glass France Vitre de véhicule pour affichage tête haute
WO2022073894A1 (fr) 2020-10-05 2022-04-14 Saint-Gobain Glass France Vitre de véhicule pour affichage tête haute
WO2022253659A1 (fr) 2021-06-02 2022-12-08 Agc Glass Europe Système d'affichage tête haute
CN114035322A (zh) 2021-10-21 2022-02-11 福耀玻璃工业集团股份有限公司 一种抬头显示玻璃及其抬头显示系统
EP4265411A1 (fr) 2022-05-19 2023-10-25 Fuyao Glass Industry Group Co., Ltd. Verre d'affichage tête haute et système d'affichage tête haute
CN117465203A (zh) 2023-10-27 2024-01-30 福耀玻璃工业集团股份有限公司 黑边显示车窗与车辆
CN117289468A (zh) 2023-11-03 2023-12-26 福耀玻璃工业集团股份有限公司 抬头显示玻璃及抬头显示系统

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