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EP4580873A1 - Vitre composite avec couche de masquage et feuille fonctionnelle électriquement commutable - Google Patents

Vitre composite avec couche de masquage et feuille fonctionnelle électriquement commutable

Info

Publication number
EP4580873A1
EP4580873A1 EP23761139.7A EP23761139A EP4580873A1 EP 4580873 A1 EP4580873 A1 EP 4580873A1 EP 23761139 A EP23761139 A EP 23761139A EP 4580873 A1 EP4580873 A1 EP 4580873A1
Authority
EP
European Patent Office
Prior art keywords
pane
layer
composite pane
functional film
composite
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
EP23761139.7A
Other languages
German (de)
English (en)
Inventor
Michele CAPPUCCILLI
Adil JAAFAR
Florence JACQUES
Michael Labrot
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 EP4580873A1 publication Critical patent/EP4580873A1/fr
Pending legal-status Critical Current

Links

Classifications

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    • 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
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    • 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
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • 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
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    • 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
    • B32B17/10045—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 with at least one intermediate layer consisting of a glass sheet
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    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
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    • B32B17/10165—Functional features of the laminated safety glass or glazing
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    • 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
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • 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
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    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
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    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
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    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
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    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
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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
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/06—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals
    • 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
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • 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
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/38—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal at least one coating being a coating of an organic material
    • 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
    • B32B2255/205—Metallic 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
    • B32B2255/26—Polymeric 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
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/202—Conductive
    • 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
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • 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
    • 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
    • B32B2307/416—Reflective
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma 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
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • 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
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/23—Optical features of instruments using reflectors
    • 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
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/25—Optical features of instruments using filters
    • 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
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/77—Instrument locations other than the dashboard
    • B60K2360/785—Instrument locations other than the dashboard on or in relation to the windshield or windows
    • 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
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/15—Deposition methods from the vapour phase
    • C03C2218/154—Deposition methods from the vapour phase by sputtering
    • 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
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/15—Deposition methods from the vapour phase
    • C03C2218/154—Deposition methods from the vapour phase by sputtering
    • C03C2218/156—Deposition methods from the vapour phase by sputtering by magnetron sputtering
    • 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 invention relates to a composite pane with a reflection layer applied in certain areas and a masking layer in combination with an electrically switchable functional film, a method for its production and its use, and a projection arrangement.
  • Head-up displays Modern automobiles are increasingly being equipped with so-called head-up displays (HllDs).
  • HllDs head-up displays
  • a projector typically in the dashboard area
  • images are projected onto the windshield, reflected there and perceived by the driver as a virtual image behind the windshield.
  • Important information can be projected into the driver's field of vision, such as the current driving speed, navigation or warning information, which the driver can perceive without having to take his eyes off the road.
  • Head-up displays can make a significant contribution to increasing road safety.
  • head-up displays often have the problem that the area of the windshield that is intended to reflect the light projected by the projector must have a high level of transparency, usually at least 70%.
  • the reflected light from the projector is therefore superimposed by light from the external environment, which, depending on the lighting conditions, can lead to a reduction in the contrast of the virtual image and thus to poorer visual perceptibility for the driver.
  • Sufficient visual perceptibility of particularly safety-relevant information such as lane guidance, speed display or engine speed should be guaranteed in all weather and lighting conditions. It would be desirable to have a projection arrangement based on head-up display technology in which no unwanted secondary images occur and whose arrangement is relatively easy to accomplish while being easy to see with sufficient brightness and contrast of the displayed image information.
  • the contrast increase can be achieved, for example, by making the background of the reflection area largely or completely opaque.
  • Such solutions require that a reflection layer is only applied to a locally limited area of the windshield.
  • the application of metallic coatings to glass panes is usually carried out using sputtering, in particular magnetron sputtering. During sputtering, atoms are removed from a target by bombarding them with ions. Using physical vapor deposition, the glass pane is coated with the atoms released from the target in an evacuated chamber. The atoms move through the chamber towards the glass pane, guided by electric fields.
  • Magnetron sputtering is also suitable for coating glass panes because, unlike many other coating technologies, it can also be used when the glass pane is curved, as is the case, for example, with panes intended for the automotive sector.
  • the selective coating of only certain surface areas can be achieved, for example, by masking the areas that should not be coated.
  • Cold gas spraying is also suitable as a method for coating glass panes and is a coating method well known to those skilled in the art, in which a powder is applied to a carrier at very high speed.
  • Methods for coating using cold gas spraying are known, for example, from WO 2010/003396 A1, EP 3 845685 A1 and EP 2902530 A1.
  • a reflection layer in the area of the masking layer enables good visibility of the virtual image with high contrast and suitable brightness.
  • the dimensions of the masking layer and reflection layer have been fixed during production, so that there is no variability of the opaque area in practical use.
  • the present invention is based on the object of providing an improved composite pane with a locally applied reflection layer, with which the above mentioned disadvantage can be overcome.
  • the composite pane should be easy and reliable to produce in industrial series production.
  • the composite pane according to the invention comprises an outer pane, a thermoplastic intermediate layer, at least one masking layer, and an inner pane.
  • the thermoplastic intermediate layer is arranged between the outer pane and the inner pane.
  • the masking layer is arranged between the outer pane and the inner pane.
  • the composite pane further comprises at least one electrically switchable functional film, with a functional layer which can be switched between a first switching state with lower optical transmission and a second switching state with higher optical transmission by applying an operating voltage.
  • the electrically switchable functional film is arranged in a vertical view through the composite pane immediately adjacent to the masking layer or in overlap with an opening in the masking layer, the masking layer and the switchable functional film being arranged in an area of the composite pane.
  • the composite pane comprises at least one reflection layer for reflecting light on the outside surface and/or on the interior surface of the inner pane, the reflection layer being arranged completely in the aforementioned region of the composite pane when viewed vertically through the composite pane, in which the masking layer and the switchable functional film are arranged.
  • the dimension of the opaque area of the composite pane, as specified by the masking layer, can be expanded as desired.
  • the opaque area of the composite pane is preferably completely expanded by the electrically switchable functional film in the first switching state.
  • the electrically switchable functional film is arranged to overlap an opening in the masking layer, the dimension of the opaque area of the composite pane, as it passes through the masking layer is specified, can be optionally expanded, whereby the opening in the masking layer can be made opaque by the electrically switchable functional film in the first switching state.
  • the electrically switchable functional film completely covers the opening in the masking layer when viewed vertically through the composite pane.
  • the electrically switchable functional film thus supplements the masking layer in the first switching state in order to enlarge the opaque area of the composite pane.
  • the masking layer and the electrically switchable functional film are used in combination to randomly change the size of the opaque area of the composite pane.
  • the opaque area of the composite pane results from the combination of the opaque areas of the masking layer and electrically switchable functional film, based on a vertical view through the composite pane.
  • the opaque area of the composite pane is created by the masking layer alone.
  • the electrically switchable functional film advantageously enables the dimension of the opaque area of the composite pane to be changed when it is in the first switching state with lower optical transmission, i.e. the opaque area is enlarged.
  • the dimension of the opaque area of the composite pane can be reduced to that of the masking layer when it is in the second switching state with higher optical transmission, i.e. the opaque area of the composite pane is reduced in size.
  • the size of the opaque area of the composite pane can be selectively increased or decreased by electrically switching the electrically switchable functional film and in this way can be specifically adapted to the respective requirements.
  • the electrically switchable functional film thus serves to increase the dimension of the opaque region of the composite pane when the electrically switchable functional film is in the first switching state, and on the other hand to leave the opaque region unchanged when it is in the second switching state.
  • the switchable functional film for visible light is opaque in the first switching state and transparent in the second switching state.
  • transparent means that the transmission for visible light is more than 30%.
  • “opaque” means a light transmission of less than 5%, preferably less than 1.5%, in particular at most 0.1%, for example 0%.
  • the switchable functional film has an optical transmission of less than 1.5% in the first switching state and an optical transmission of more than 30% in the second switching state.
  • the electrically switchable functional film is opaque with lower optical transparency in the first switching state and transparent with higher optical transparency in the second switching state.
  • Electrically switchable functional films whose optical transparency can be changed are well known to those skilled in the art and are commercially available. These are generally flat electro-optical functional elements with a functional layer (active layer) between two surface electrodes, the optical transparency of the functional layer being electrically controllable. This means that the optical transparency of the functional film or functional layer can be controlled by applying an electrical voltage (operating voltage), the functional layer generally being opaque without electrical voltage and transparent with electrical voltage. The applied voltage can therefore be used to control the transmission of visible light through the electro-optical functional element, although such an adjustment of the optical properties generally does not enable independent illumination of the composite panes.
  • an electrical voltage operating voltage
  • the applied voltage can therefore be used to control the transmission of visible light through the electro-optical functional element, although such an adjustment of the optical properties generally does not enable independent illumination of the composite panes.
  • busbars which are applied in the edge region of the functional layer and contact it in an electrically conductive manner.
  • an external voltage source typically via flat conductors attached to the busbars, a voltage is applied and the functional layer is switched.
  • any electrically switchable functional film can be used whose optical transparency can be changed by applying an operating voltage and can be switched between an opaque switching state and a transparent switching state.
  • the electrically switchable functional film is preferably a guest-host functional film, an electrochromic functional film, an SPD functional film or a PDLC functional film.
  • Such functional films can be easily laminated into composite panes.
  • electro-optical functional films with a functional layer based on liquid crystal, which are based on the so-called “guest host” effect represent an interesting possibility to implement an electro-optical switching function in a composite pane in a simple, space-saving, cost-effective and reliable manner of the application.
  • guest-host functional films typically comprise a nematic liquid crystal (host) which is provided with an additive (guest), with dichroic dye molecules, for example, which absorb light anisotropically being used as an additive. Since the molecules of the additive have an elongated shape, their orientation can be controlled by the orientation of the molecules of the liquid crystal, ie host, which in practice is achieved by applying an electric field to the liquid crystal. In this way, the optical transparency of the guest-host functional film can be controlled very precisely using an external electric field.
  • Guest-host functional films with a functional layer made of a liquid crystalline material with an embedded additive are well known to those skilled in the art, so there is no need to go into this in more detail here.
  • Guest-host functional films are commercially available, for example under the term "Light Control Film", for example from Dai Nippon Printing Co., Ltd., Japan, under the product name LCF005 (EU).
  • the composite pane according to the invention is generally intended to separate the interior of a vehicle window opening from the external environment.
  • the inner pane refers to the pane of the composite pane facing the vehicle interior.
  • the outer pane refers to the pane facing the external environment.
  • the composite pane has in particular an upper edge and a lower edge, as well as two side edges running between them.
  • the top edge refers to the edge that is intended to point upwards in the installed position.
  • the lower edge refers to the edge that is intended to point downwards in the installed position.
  • the top edge is often referred to as the roof edge and the bottom edge as the engine edge.
  • FIG. 3 shows a cross section through the embodiment shown in FIG. 1,
  • FIG. 7A shows a cross section through a further embodiment with an electrically switchable functional film in the transparent switching state
  • FIG. 7B shows a cross section through a further embodiment with an electrically switchable functional film in the opaque switching state
  • FIG. 8A shows a top view of the embodiment of the composite pane according to the invention from FIG. 2 with an electrically switchable functional film in the transparent switching state
  • FIG. 8B shows a top view of the embodiment of the composite pane according to the invention from FIG. 2 with electrically switchable functional film in the opaque switching state
  • Fig. 9 shows an exemplary embodiment of the method according to the invention using a flowchart.
  • Figures 1 and 2 each show a top view of an embodiment of the composite pane 100 according to the invention and in Figure 3 the cross section through the composite pane 100 shown in Figure 1 is shown along the section line XX '.
  • the composite pane 100 shown in Figures 1 and 2 has an upper edge O, a lower edge U and two side edges S. Furthermore, the composite pane 100 includes one Outer pane 1 with an outside surface I and an interior surface II, an inner pane 2 with an outside surface III and an interior surface IV, a thermoplastic intermediate layer 3, a first masking layer 4 and a second masking layer 8.
  • the thermoplastic intermediate layer 3 is between the outer pane 1 and the inner pane 2 arranged.
  • the outer pane 1, the thermoplastic intermediate layer 3 and the inner pane 2 are arranged one above the other over the entire surface.
  • the first masking layer 4 is arranged between the thermoplastic intermediate layer 3 and the inner pane 2 in an area of the composite pane 100, the areal extent of which is smaller than the areal extent of the composite pane 100, ie the first masking layer 4 does not extend over the entire surface of the composite pane 100.
  • the second masking layer 8 is arranged between the thermoplastic intermediate layer 3 and the outer pane 1 in an area of the composite pane 100, the areal extent of which is smaller than the areal extent of the composite pane 100, ie the second masking layer 8 does not extend over the entire surface of the composite pane 100.
  • the two masking layers 4, 8 are each designed as an opaque covering print and are arranged only in an edge region of the composite pane 100 bordering the lower edge U.
  • the two masking layers 4, 8 extend between the two side edges S of the composite pane 100 and, starting from the lower edge U of the composite pane 100, have a width of, for example, 30 cm.
  • the composite pane 100 further comprises an electrically switchable functional film 6, which can be switched between a first switching state with lower optical transmission (opaque) and a second switching state with higher optical transmission (transparent) by applying an operating voltage.
  • the electrically switchable functional film 6 is arranged in a vertical view through the composite pane 100 in (complete) overlap with an opening 7 in the first masking layer 4.
  • the opening 7 in the first masking layer 4 can be made opaque in the first switching state by the electrically switchable functional film 6.
  • the electrically switchable functional film 6 is arranged in a vertical view through the composite pane 100 immediately adjacent to the first masking layer 4 in order to enlarge the opaque area of the composite pane 100 (without gaps).
  • the first masking layer 4 has no opening.
  • the composite pane 100 comprises on the outside surface (III) of the inner pane 2 a reflection layer 5 for reflecting light, wherein the reflection layer 5, when viewed vertically through the composite pane 100, is arranged completely in the area of the composite pane 100 in which the first masking layer 4 and the electrically switchable functional film 6 are arranged.
  • FIG 3 shows a modification of the embodiment of FIG through the composite pane 100) is wider than the remaining part of the masking layers 4, 8.
  • the frame-shaped circumference of the masking layer 4 is not shown for the sake of simplicity.
  • the thermoplastic intermediate layer 3 contains, for example, PVB and has a thickness of 0.76 mm.
  • the outer pane 1 consists, for example, of soda-lime glass and is 2.1 mm thick.
  • the inner pane 2 consists, for example, of soda-lime glass and is 1.6 mm thick.
  • the composite disk 100 may have any suitable geometric shape and/or curvature.
  • the composite disk 100 is a curved composite disk.
  • the composite pane 100 is the windshield of a motor vehicle.
  • the projection arrangement 101 shown in FIG. 4 comprises a composite pane 100 and an imaging unit 9.
  • the imaging unit 9 is used to generate p-polarized light and/or s-polarized light (Image information), which is directed onto the reflection layer 5 and is reflected by the reflection layer 5 as reflected light into the vehicle interior, where it can be perceived by an observer, e.g. driver.
  • the reflection layer 5 is designed to reflect the light from the imaging unit 9 in a suitable manner.
  • the light preferably hits the reflection layer 5 with an angle of incidence of 55° to 80°, in particular 62° to 77°.
  • the imaging unit 9 is, for example, a display, in particular an LCD display.
  • the imaging unit 9 is preferably used to generate only p-polarized light, which can also be seen well, in particular, with polarizing sunglasses that have an s-polarization filter.
  • the imaging unit 9 is designed in such a way that the image is directed onto the reflection surface 5 in such a way that either an area of the reflection layer 5 overlaps the area of the first masking layer 4 and electrically switchable functional film 6 or an area of the reflection layer 5 only overlaps the first Masking layer 4 is used for reflection (in a vertical view through the composite pane 100).
  • a step S1 an outer pane 1 with an outside surface I and an interior surface II, a thermoplastic intermediate layer 3 and an inner pane 2 with an outside surface III and an interior surface IV are provided.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Laminated Bodies (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne une vitre composite (100) comprenant une vitre externe (1) avec une surface côté extérieur (I) et une surface côté intérieur (II), une couche intermédiaire thermoplastique (3), une vitre interne (2) avec une surface côté extérieur (III) et une surface côté intérieur (IV), au moins une couche de masquage (4) qui est disposée entre la vitre externe (1) et la vitre interne (2), et au moins une feuille fonctionnelle électriquement commutable (6), qui peut être commutée entre un premier état de commutation avec une transmission optique inférieure et un second état de commutation avec une transmission optique supérieure par application d'une tension de fonctionnement, la feuille fonctionnelle électriquement commutable (6) étant directement adjacente à la couche de masquage (4) sur une vue perpendiculaire à travers la vitre composite (100) ou étant agencée de façon à recouvrir un trou traversant (7) de la couche de masquage (4). La couche de masquage (4) et la feuille fonctionnelle électriquement commutable (6) sont disposées dans une région de la vitre composite (100). La vitre composite (100) comprend en outre au moins une couche réfléchissante (5) pour réfléchir de la lumière sur la surface côté extérieur (III) et/ou sur la surface côté intérieur (IV) de la vitre interne (2). Dans une vue à travers la vitre composite (100), la couche réfléchissante (5) est disposée complètement dans la région de la vitre composite (100) dans laquelle la couche de masquage (4) et la feuille fonctionnelle électriquement commutable (6) sont agencées.
EP23761139.7A 2022-08-30 2023-08-25 Vitre composite avec couche de masquage et feuille fonctionnelle électriquement commutable Pending EP4580873A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22192946 2022-08-30
PCT/EP2023/073318 WO2024046886A1 (fr) 2022-08-30 2023-08-25 Vitre composite avec couche de masquage et feuille fonctionnelle électriquement commutable

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DE19544127C1 (de) 1995-11-27 1997-03-20 Gimsa Jan Dr Verfahren und Vorrichtung zur Erzeugung von Resonanzerscheinungen in Partikelsuspensionen und ihre Verwendung
DE19726966C1 (de) 1997-06-25 1999-01-28 Flachglas Ag Verfahren zur Herstellung einer transparenten Silberschicht mit hoher spezifischer elektrischer Leitfähigkeit , Glasscheibe mit einem Dünnschichtsystem mit einer solchen Silberschicht und deren Verwendung
DE10126868C1 (de) 2001-06-01 2002-11-21 Saint Gobain Sekurit D Gmbh Scheibe mit einer opaken Beschichtung
DE102008026339A1 (de) 2008-05-31 2009-12-03 Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg Elektrisch schaltbares Sichtschutzfenster
DE102008031843A1 (de) 2008-07-05 2010-01-07 Mtu Aero Engines Gmbh Verfahren und Vorrichtung zum Kaltgasspritzen
GB0916379D0 (en) 2009-09-18 2009-10-28 Pilkington Group Ltd Laminated glazing
FR2962818B1 (fr) 2010-07-13 2013-03-08 Saint Gobain Dispositif electrochimique a proprietes de transmission optique et/ou energetique electrocommandables.
US8164818B2 (en) 2010-11-08 2012-04-24 Soladigm, Inc. Electrochromic window fabrication methods
US9347136B2 (en) 2014-01-31 2016-05-24 Pratt & Whitney Canada Corp. Method for applying a coating to a substrate
MX387062B (es) 2016-05-17 2025-03-19 Saint Gobain Sistema de visualizacion frontal
GB202000103D0 (en) 2020-01-06 2020-02-19 Rolls Royce Plc Cold spraying
EP4226204A1 (fr) * 2020-10-05 2023-08-16 Saint-Gobain Glass France Vitre de véhicule pour affichage tête haute

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WO2024046886A1 (fr) 2024-03-07
JP2025529187A (ja) 2025-09-04
KR20250055601A (ko) 2025-04-24

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