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WO2024199990A1 - Agencement pour produire un affichage optique - Google Patents

Agencement pour produire un affichage optique Download PDF

Info

Publication number
WO2024199990A1
WO2024199990A1 PCT/EP2024/056509 EP2024056509W WO2024199990A1 WO 2024199990 A1 WO2024199990 A1 WO 2024199990A1 EP 2024056509 W EP2024056509 W EP 2024056509W WO 2024199990 A1 WO2024199990 A1 WO 2024199990A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
glass
pane
holographic element
arrangement according
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/EP2024/056509
Other languages
German (de)
English (en)
Inventor
Semjon MOORAJ
Robert Besler
Nikolai BORCHMANN
Florian Manz
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 Glass France SAS
Compagnie de Saint Gobain SA
Original Assignee
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
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 Glass France SAS, Compagnie de Saint Gobain SA filed Critical Saint Gobain Glass France SAS
Publication of WO2024199990A1 publication Critical patent/WO2024199990A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B27/0103—Head-up displays characterised by optical features comprising holographic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—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
    • 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
    • B32B3/02—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 features of form at particular places, e.g. in edge regions
    • B32B3/08—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 features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • 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]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • G03H1/0252—Laminate comprising a hologram layer
    • G03H1/0256—Laminate comprising a hologram layer having specific functional 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
    • 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
    • B32B17/10009—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
    • B32B17/10082—Properties of the bulk of a glass sheet
    • B32B17/10119—Properties of the bulk of a glass sheet having a composition deviating from the basic composition of soda-lime glass, e.g. borosilicate
    • 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
    • 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
    • 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
    • B32B17/1055—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
    • B32B17/1077—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 polyurethane
    • 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
    • B32B17/10788—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 ethylene vinylacetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2250/44—Number of layers variable across the laminate
    • 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
    • B32B2307/416—Reflective
    • 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
    • B32B2307/42—Polarizing, birefringent, filtering
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    • B32B2333/00—Polymers of unsaturated acids or derivatives thereof
    • B32B2333/04—Polymers of esters
    • B32B2333/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
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    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B2027/0192—Supplementary details
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    • G—PHYSICS
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    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2250/00—Laminate comprising a hologram layer
    • G03H2250/37—Enclosing the photosensitive material
    • G—PHYSICS
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    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2270/00—Substrate bearing the hologram
    • G03H2270/10—Composition
    • G03H2270/11—Crystal or glass

Definitions

  • HIDs head-up display
  • the windshield is illuminated by an imaging unit (for example a projector).
  • the light reflected on the windshield is perceived by the driver as a virtual image (as seen from his perspective) 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 therefore make a significant contribution to increasing road safety.
  • the angle of incidence at which the windshield is irradiated by the imaging unit is typically not far from the Brewster angle of an air-glass transition.
  • the imaging unit can be operated with s-polarized radiation, which is reflected by the external glass surfaces, to generate the display image.
  • the imaging unit can alternatively be operated with p-polarized radiation, which is not significantly reflected by the glass surfaces.
  • the windshield is then typically provided with a reflective coating to reflect the p-polarized radiation.
  • Windshields are made of composite panes consisting of an outer pane and an inner pane, which are connected to one another via a thermoplastic intermediate layer.
  • the holographic element is typically embedded in the intermediate layer.
  • the problem often arises that the low-molecular components of the intermediate layer can diffuse through the polymer carrier films or components of the carrier films themselves can diffuse into the photopolymer layer. This sometimes changes the diffraction structure of the hologram, which impairs the selectivity of the light-diffractive properties.
  • the carrier films can be given a certain waviness during the lamination of the windshield as a result of shrinkage processes (orange skin effect), which means that the angle of reflection is changed locally and the display image also appears wavy.
  • the present invention is based on the object of providing an improved arrangement for producing an optical display with a holographic element.
  • the holographic element should in particular be less susceptible to the diffusion of components of the intermediate layer of the composite pane, preferably also to deformations, so that the formation of waviness is avoided.
  • the arrangement according to the invention for producing an optical display comprises a composite pane and an imaging unit.
  • the imaging unit is directed at an area of the composite pane and, during operation, irradiates this area with light, i.e. electromagnetic radiation in the visible spectral range, to produce a display image.
  • the area irradiated or irradiated by the imaging unit The area of the composite pane is referred to as the display area in the sense of the invention.
  • the arrangement according to the invention for producing an optical display can also be referred to as a display arrangement, display system or projection arrangement.
  • the composite pane comprises a first glass pane and a second glass pane, which are connected to one another via a thermoplastic intermediate layer.
  • the composite pane is equipped with a holographic element, at least in the display area, which is embedded in the intermediate layer.
  • the holographic element covers at least the display area, but can also extend beyond it.
  • the holographic element is suitable for diffracting the radiation of the imaging unit to generate the display image. The diffraction is caused in particular by a hologram, which is formed in the photopolymer layer.
  • the holographic element has a photopolymer layer.
  • the holographic element comprises in the order given:
  • first glass layer or SiO2 layer first glass or SiO2 layer
  • second glass or SiO2 layer a second glass or SiO2 layer (second glass or SiO2 layer).
  • the arrangement according to the invention or the holographic element according to the invention is characterized in particular by the fact that the photopolymer layer is arranged between two glass or SiO2 layers.
  • the photopolymer layer is arranged between two polymer carrier films.
  • the glass or SiO2 layers are impermeable to components of the intermediate layer, which therefore cannot diffuse into the photopolymer layer.
  • the glass or SiO2 layers are chemically inert, so that no interaction with the photopolymer layer occurs and no components of the glass or SiO2 layers diffuse into the photopolymer layer, as can occur with polymer carrier films.
  • the holographic element is also very stable and in particular not susceptible to becoming wavy during lamination of the composite pane, as can occur with conventional holographic elements as a result of shrinkage processes of the polymer carrier films. This ensures a high-quality, undistorted display of the display image.
  • the glass or SiC>2 layers often have a refractive index that is only comparatively small compared to the refractive index of the other components of the composite pane, so that optical interference effects such as reflections can be avoided in comparison to polymer carrier films.
  • the second glass pane of the composite pane faces the imaging unit (and the viewer of the display image), while the first glass pane faces away from the imaging unit.
  • the composite pane is intended as a window pane in a window opening (for example in a vehicle, a building or a room) to separate an interior from an external environment.
  • the pane facing the interior can then be referred to as the inner pane, and the pane facing the external environment as the outer pane.
  • the imaging unit and the viewer of the display image are arranged in the interior (for example when the arrangement is used as a head-up display (HUD) in a vehicle).
  • the second pane of glass within the meaning of the invention is then, for example, the inner pane of the composite pane, and the first pane of glass is the outer pane.
  • Holography is a method for recording and reconstructing a wave field. While in photography only the intensity and (in the case of color photography) the frequency of the incident light are stored on a film, in holography the phase and intensity of the light are stored.
  • a hologram is created by irradiating an object with coherent light, which is reflected and scattered by the object. The wave field thus created (object wave) is superimposed with unscattered light (reference wave) from the same radiation source. Optical interference occurs between the object wave and the reference wave, creating an interference pattern. The holographic medium is exposed to this interference pattern. The holographic medium only reacts to the intensity of the light, but the interference of the wave fronts records the relative phase (between the object and reference wave). The hologram is created by developing the holographic medium.
  • a laser is usually used as the coherent radiation source, the radiation of which is expanded using scattering lenses.
  • the holographic medium in question is the photopolymer layer according to the invention.
  • polymerization is achieved by exposure This changes the optical properties (e.g. the refractive index), creating a hologram.
  • the photopolymer is then fixed by illuminating it with an incoherent light source.
  • holography can be used to produce optical components (holographic optical components, HOE). This allows conventional optical components such as lenses, mirrors or prisms to be replaced.
  • the holographic element according to the invention can also be regarded as such a holographic optical component.
  • the holographic element reflects the radiation from the imaging unit back towards the viewer through diffraction, thereby creating the virtual display image.
  • the hologram forms a diffraction grating at which the radiation from the imaging unit is diffracted (in particular independently of the Fresnel reflection) in such a way that it is reflected back towards the viewer, or towards the expected position of the viewer, the so-called "eyebox".
  • the virtual image area created by the hologram's diffraction grating is located at a certain distance behind the composite pane from the viewer's perspective.
  • the virtual display image then appears at this point.
  • the hologram can achieve very specific optical properties.
  • the hologram only reflects or diffracts light at a certain angle of incidence and only at one or more specific wavelengths. This is a great advantage of holographic display arrangements because the reflection or diffraction of light that does not originate from the imaging unit and therefore hits the holographic element at a different angle of incidence and predominantly at a different wavelength is avoided.
  • the display image appears very clear and undesirable effects, such as annoying reflections, can be avoided.
  • the holographic exposure of the photopolymer has one or more wavelengths which correspond to the wavelength or wavelengths of the radiation of the imaging unit.
  • the angle of incidence and the wavelength of the radiation of the imaging unit to be used in the arrangement for which the holographic element is intended are taken into account. This is done in particular by a suitable selection of the exposure object and by using coherent light of the said wavelength(s) for exposure.
  • the proportion of the radiation of the imaging unit that is reflected by the holographic element to generate the display image is preferably at least 2%, particularly preferably at least 4%, most particularly preferably at least 10%.
  • the said proportion can be, for example, from 2% to 40% or from 4% to 20%.
  • the first glass or SiO2 layer and the second glass or SiO2 layer can be formed as glass layers, in particular thin glass layers.
  • the glass layers are provided prefabricated, in particular manufactured by means of a flat glass production process.
  • the first glass or SiO2 layer and the second glass or SiO2 layer can alternatively be formed as SiO2 layers which are applied to the photopolymer layer, for example from the gas phase, in particular by sputtering.
  • the holographic element then contains in particular no additional glass layers - the SiO2 layers themselves form the carrier or protective layers of the photopolymer layer.
  • the first glass or SiO2 layer and the second glass or SiO2 layer can be selected independently of one another as glass layers or SiO2 layers, so that a combination of a first glass layer and a second SiO2 layer is also possible, or vice versa.
  • a thin glass layer or an applied SiO2 layer does not increase the overall thickness of the composite pane too much.
  • a SiO2 layer (silicon oxide layer) is understood to mean a layer based on silicon oxide.
  • the layer preferably contains at least 80% by weight of silicon oxide, particularly preferably at least 80% by weight of silicon oxide, and may also contain dopants or impurities.
  • the silicon oxide may be stoichiometric, substoichiometric or superstoichiometric in terms of oxygen content.
  • the SiO2 layer can therefore also be referred to as a SiO x layer, although the term "SiO2 layer" is used here for better understanding.
  • the first glass or SiO2 layer and the second glass or SiO2 layer preferably each have a thickness of at most (i.e. less than or equal to) 800 pm, particularly preferably at most 550 pm, very particularly preferably at most 330 pm, in particular at most 150 m. This produces good results. Very thin layers of glass also have the advantage that they can be supplied on rolls, which ensures easy handling during the manufacture of the laminated pane.
  • the first glass or SiO2 layer and the second glass or SiO2 layer preferably each have a thickness of at least (i.e. greater than or equal to) 10 nm. This is sufficient to prevent diffusion through the glass or SiO2 layers.
  • the thickness of the first and second glass or SiO2 layers is particularly preferably at least 50 pm, with the first and second glass or SiO2 layers in this case preferably being glass layers.
  • the thickness of the first and the second glass or SiO2 layer can be selected independently of one another, but are preferably the same.
  • the thickness of the first and the second glass or SiO2 layer is, for example, in the range from 10 nm to 800 pm, preferably from 50 pm to 550 pm, particularly preferably from 50 pm to 330 pm and in particular from 50 pm to 150 pm.
  • the thickness of the first and second glass or SiO2 layers is in particularly advantageous embodiments
  • the holographic element comprises a first and a second glass layer
  • these are preferably prestressed, in particular chemically prestressed. This increases their breaking strength so that they are less susceptible to damage, in particular during the manufacture of the composite pane.
  • the holographic element has a first and a second
  • the glass layer comprises a glass layer
  • these are preferably made of aluminosilicate glass or borosilicate glass. These types of glass have the advantage that they can be easily chemically tempered. Aluminosilicate glass is particularly preferred.
  • the glass layers can also be made of other types of glass, for example soda-lime glass.
  • the type of glass for the first and second glass layers can be chosen independently of one another, but are preferably the same.
  • the glass layers can have transparent coatings that are customary in the art, for example an anti-reflection coating, an IR-reflecting coating or a UV-reflecting coating. Such coatings are preferably arranged on the surface of one or both of the glass layers facing away from the photopolymer layer.
  • the photopolymer layer is not limited to a specific photopolymer material. All photopolymers that can be exposed with a hologram can be used.
  • the photopolymer layer preferably has a thickness of 5 pm to 50 pm, particularly preferably 7 pm to 30 pm, most particularly preferably 10 pm to 20 pm. This achieves good results.
  • the composite pane has at least one transparent area which is suitable and intended for viewing. This transparent area is referred to as the viewing area in the sense of the invention.
  • the display area is preferably arranged in the transparent viewing area of the composite pane.
  • the composite pane can be made transparent overall, so that the see-through area encompasses the entire composite pane.
  • the composite pane it is also possible for the composite pane to have an opaque masking area in addition to the see-through area. It is not possible to see through the masking area, the light transmission of the masking area is less than 5%, preferably less than 2% and very particularly preferably essentially 0%.
  • Such masking areas are particularly common in vehicle windows, with the masking area being arranged in a peripheral edge area of the composite pane and surrounding a central see-through area like a frame.
  • the masking region is typically formed by an opaque cover print on a surface of the first and/or the second glass pane.
  • the cover print is preferably formed at least on the surface of the glass pane facing away from the imaging unit (for example the first) that faces the intermediate layer.
  • the cover print is formed in particular from an enamel that contains glass frits and a pigment and is printed on using a screen printing process and then fired into the pane surface.
  • the pigment is typically a black pigment, for example pigment black (carbon black), aniline black, bone black, iron oxide black, spinel black and/or graphite.
  • the cover print preferably has a thickness of 5 pm to 50 pm, particularly preferably 8 pm to 25 pm.
  • opaque films can also be used in the intermediate layer to form the masking region.
  • the radiation from the imaging unit hits the composite pane at a specific angle of incidence.
  • the angle of incidence is the angle between the incidence vector of the radiation and the surface normal of the surface that the radiation hits first (i.e. the surface normal to the surface of the second pane of glass facing the imaging unit). In the typical case of a window pane, where the imaging unit is arranged in the interior, this is the interior-side surface normal (i.e. the surface normal to the interior-side surface of the inner pane).
  • the angle of incidence is determined at a point in the display area, preferably in the geometric center of the display area.
  • the invention can in principle be implemented with any angle of incidence. For structural reasons, however, comparatively large angles of incidence of more than 45° typically have to be selected.
  • the radiation from the imaging unit can be reflected on the surface of the glass pane (air-glass transition). This can lead to an undesirable and disturbing ghost image, i.e. a lower-intensity second display image that appears laterally offset from the main display image (caused by the holographic element).
  • the ghost image can be minimized by appropriate polarization of the radiation from the imaging unit.
  • the polarization plays no significant role in the reflection at the glass surface.
  • Unpolarized, linearly s- or p-polarized or circularly polarized radiation can be used.
  • the imaging unit is preferably operated with p-polarized radiation. The imaging unit therefore irradiates the display area with p-polarized radiation. Since these large angles of incidence are typically close to the Brewster angle, p-polarized radiation is only reflected to a small extent and the ghost image is weakened in its intensity.
  • the radiation imaging unit is preferably predominantly p-polarized, i.e. has a proportion of p-polarized radiation of more than 50%, preferably at least 80%, particularly preferably at least 95%.
  • the radiation is in particular essentially purely p-polarized - the p-polarized radiation proportion is therefore 100% or deviates only insignificantly from this.
  • the indication of the direction of polarization refers to the plane of incidence of the radiation on the composite pane.
  • p-polarized radiation refers to radiation whose electric field oscillates in the plane of incidence.
  • s-polarized radiation refers to radiation whose electric field oscillates perpendicular to the plane of incidence.
  • the plane of incidence is spanned by the incidence vector and the surface normal of the composite pane at a point within the display area, preferably in the geometric center of the display area. If the composite pane is curved, as is common in the vehicle sector in particular, the curvature of the pane affects the plane of incidence and thus the definition of the polarization.
  • the polarization components in particular the ratio of p-polarized radiation to s-polarized radiation or vice versa
  • a polarization filter or a polarizing beam splitter can be arranged between the imaging unit and the composite pane in the beam path if the imaging unit itself does not already provide radiation of the desired polarization direction.
  • the Brewster angle for an air-glass transition in the case of soda-lime glass, which is generally used for window panes, is 57.2° (with a refractive index of soda-lime glass of 1.55 at a wavelength of 550 nm).
  • the imaging unit irradiates one display area with an angle of incidence that deviates from the Brewster angle by a maximum of 15°.
  • the Brewster angle of the entrance surface i.e. the surface of the glass pane facing the imaging unit (for example the second one).
  • the reflection of the p-polarized radiation on the glass surface is then advantageously low.
  • the angle of incidence is preferably from 45° to 70°. Angles of incidence of 60° are also possible. up to 70°, for example around 65°, as is usual in head-up displays in motor vehicles.
  • the deviation of the angle of incidence from the Brewster angle is particularly preferably at most 10°.
  • the windshield and its components preferably have a constant thickness.
  • the surfaces of the glass panes facing away from the intermediate layer are preferably aligned parallel to one another.
  • the use of p-polarized radiation also has the advantage that the display image is recognizable by wearers of polarization-selective sunglasses, which typically only allow p-polarized radiation to pass and block s-polarized radiation.
  • the hologram can be optimized for the diffraction of p-polarized radiation.
  • the hologram preferentially reflects or diffracts s-polarized light
  • the composite pane between the glass pane facing the imaging unit (for example the second) and the holographic element to have a coating, a film or an optical component in the form of an A/2 delay plate (also known as an A/2 wave plate or A/2 plate), which converts the p-polarized radiation into s-polarized radiation before it hits the holographic element.
  • A/2 delay plate also known as an A/2 wave plate or A/2 plate
  • the imaging unit can also be operated with s-polarized radiation at comparatively large angles of incidence.
  • the glass pane facing the imaging unit (for example the second) is preferably arranged at a suitable angle to the holographic element so that the main display image is superimposed with the ghost image.
  • This can be achieved by using a wedge-shaped film between the said glass pane and the holographic element, the thickness of which typically increases in a direction from the lower edge to the upper edge of the composite pane.
  • the composite pane In the installed position, typically has at least one vertical alignment component.
  • the lower edge refers to the edge of the composite pane that points downwards (towards the ground) in the installed position
  • the upper edge refers to the edge of the composite pane that points upwards in the installed position.
  • the holographic element has an edge seal or is provided with such an edge seal.
  • the edge seal prevents the penetration of contaminants (for example plasticizers or other components of the intermediate layer) via the side edge of the holographic element into the photopolymer layer, which could impair the hologram and its reflective or light-diffractive effect.
  • the edge seal can be designed, for example, as a polymer band which is attached all the way around the side edge of the holographic element.
  • the polymer band can be made, for example, from polyimide.
  • the holographic element is embedded in the intermediate layer of the composite pane.
  • the holographic element is connected to the first glass pane via at least one first thermoplastic layer and to the second glass pane via at least one second thermoplastic layer.
  • the thermoplastic intermediate layer is thus formed from at least the first and second thermoplastic layers, which are arranged flat on top of one another and between the glass panes, with the holographic element being arranged between the thermoplastic layers.
  • Each thermoplastic layer is preferably made of a thermoplastic film, preferably based on polyvinyl butyral (PVB), ethylene vinyl acetate (EVA) or polyurethane (PU) or mixtures or copolymers or derivatives thereof, particularly preferably PVB.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetate
  • PU polyurethane
  • the film contains the majority of the said material (proportion of greater than 50% by weight) and can optionally contain other components, for example plasticizers, stabilizers, UV or IR absorbers.
  • Each thermoplastic layer or film preferably has a thickness of 0.2 mm to 2 mm, particularly preferably 0.3 mm to 1 mm.
  • the holographic element is surrounded all around by a further thermoplastic layer, which is referred to as a capsule layer in the sense of the invention.
  • the capsule layer surrounds the holographic element like a frame.
  • the capsule layer can be made of a thermoplastic film which has a cutout into which the holographic element is inserted (preferably with a substantially precise fit).
  • the capsule layer can be composed of film sections around the holographic element.
  • the capsule layer compensates for the thickness of the holographic element in the composite pane, which can otherwise lead to stresses and even glass breakage.
  • the capsule layer with the holographic element is arranged in particular between the said first and second thermoplastic layers.
  • the first glass pane and the second glass pane are preferably made of soda-lime glass, which is common for window panes.
  • the panes can also be made of other types of glass (for example borosilicate glass, quartz glass or aluminosilicate glass).
  • panes made of transparent plastics can also be used, for example panes made of polymethyl methacrylate or polycarbonate.
  • the thickness of the first and second glass panes is preferably, independently of one another, from 0.5 mm to 10 mm, particularly preferably from 1 mm to 5 mm, and most preferably from 1.5 mm to 3 mm.
  • the first glass pane, the second glass pane and the thermoplastic intermediate layer can be clear and colorless, but also tinted or colored.
  • the composite pane can be flat or cylindrical or spherically curved.
  • Flat composite panes are particularly common as building glazing and as special vehicle glazing, for example window panes on trains or tractors.
  • Curved, particularly spherically curved composite panes are particularly common as vehicle glazing on cars and trucks. Typical radii of curvature are in the range from about 10 cm to about 40 m.
  • the imaging unit is preferably a projector or a screen (“display”, electronic display).
  • display electronic display
  • any type of screen can be used for the display system according to the invention, with OLED and LCD screens being preferred.
  • the imaging unit is directed at the display area of the composite pane, where the radiation is reflected or diffracted by the holographic element in the direction of the viewer. This creates a virtual image that the viewer perceives from behind the composite pane.
  • the viewer In order to perceive the display image, the viewer (or more precisely, his eyes) must be in the so-called eyebox.
  • the beam direction of the imaging unit can often be adjusted within certain limits, particularly vertically, in order to adapt the projection to the height of the viewer. In projectors, this is typically done using mirrors inside the projector. In screens, the angle of incidence can be changed.
  • the area in which the viewer's eyes must be located for a given beam angle setting is called the eyebox window.
  • This eyebox window can be moved vertically by adjusting the beam angle, with the entire area accessible in this way (i.e. the superposition of all possible eyebox windows) being called the eyebox.
  • a viewer located inside the eyebox can perceive the virtual image.
  • the technical terms used here are generally known to those skilled in the art from the field of HLIDs. For a detailed description, please refer to the dissertation “Simulation-based measurement technology for testing head-up displays” by Alexander Neumann at the Institute of Computer Science at the Technical University of Kunststoff (Munich: University Library of the TU Kunststoff, 2012), especially to Chapter 2 “The head-up display”.
  • the imaging unit irradiates the display area during operation of the arrangement according to the invention to generate the display image.
  • the radiation of the imaging unit is in the visible spectral range of the electromagnetic spectrum, in particular in the spectral range from 450 nm to 650 nm - typical imaging units work with the wavelengths 473 nm, 550 nm and 630 nm or with the wavelengths 460 nm, 520 nm and 630 nm (RGB).
  • the arrangement according to the invention for producing an optical display is produced by providing the composite pane, in particular installing it at its intended location, and directing the imaging unit towards the display area.
  • the composite pane can be manufactured using methods known per se.
  • the glass panes are laminated together using the thermoplastic intermediate layer.
  • a layer stack is preferably created by arranging the following layers flat and congruently on top of one another in the order given:
  • the holographic element preferably surrounded by a frame-like thermoplastic film
  • the laminated glass panes are laminated using autoclave processes, vacuum bag processes, vacuum ring processes, calender processes, vacuum laminators or combinations thereof.
  • the glass pane is usually bonded via the intermediate layer using heat, vacuum and/or pressure.
  • the exposure of the photopolymer layer with the hologram can be done before or after arranging the photopolymer layer between the glass or SiO2 layers.
  • the holographic element can be produced by providing the first glass layer with the photopolymer layer and then bonding the photopolymer layer to the second glass layer.
  • Known methods can be used to apply the photopolymer layer to the first glass layer, for example flood coating, curtain coating, spin coating, brushing or rolling.
  • the polymer is applied in liquid or flowable form before it is exposed and fixed.
  • the photopolymer can be provided on a carrier film, also on a roll.
  • the photopolymer layer can then be transferred from the carrier film to the first glass layer using a roll-to-roll process. This can be done before or after exposure to the hologram.
  • SiO2 layers can be deposited on the photopolymer layer, for example by chemical or physical vapor deposition, preferably by cathode sputtering, particularly preferably by magnetic field assisted cathode sputtering (magnetron sputtering).
  • the invention also includes the use of the arrangement according to the invention for generating an optical display in vehicles or buildings, as a piece of furniture or as a screen.
  • the composite pane is a vehicle pane (window pane of the vehicle), in particular the windshield, side window or rear window.
  • the composite pane is particularly preferably the windshield.
  • the arrangement then forms a so-called head-up display (HUD), whereby information can be projected into the driver's field of vision, which he can see without having to take his eyes off the traffic.
  • HUD head-up display
  • the arrangement can be used in any vehicle on land, on water or in the air, preferably in a motor vehicle, rail vehicle, aircraft or ship, in particular in a passenger car or truck.
  • the laminated pane is preferably a building glazing or the glazing of a room in the building, for example a window pane, door pane or part of a glass facade.
  • the invention also includes the use of a composite pane designed according to the invention as a projection surface of a display system, wherein an imaging unit is directed at the display area.
  • the composite pane is preferably a window pane of a vehicle, a building glazing or glazing of a room, a piece of furniture or a screen.
  • the invention is explained in more detail below using a drawing and exemplary embodiments.
  • the drawing is a schematic representation and not to scale. The drawing does not limit the invention in any way.
  • Fig. 1 is a plan view of a composite pane of a generic arrangement for producing an optical display
  • Fig. 2 shows a cross section through the arrangement of Figure 1
  • Fig. 3 is a cross-section through the composite pane of an arrangement according to the invention for producing an optical display
  • Fig. 4 shows a cross-section through the holographic element from Figure 3.
  • FIG 1 and Figure 2 each show a detail of an embodiment of a generic arrangement for generating an optical display.
  • the arrangement forms a head-up display (HUD) of a passenger car.
  • the arrangement comprises a composite pane 10, which is the windshield of the passenger car, and an imaging unit 4.
  • the composite pane 10 is made up of a first glass pane 1 and a second glass pane 2, which are connected to one another via a thermoplastic intermediate layer 3.
  • the first glass pane 1 forms the outer pane of the composite pane, which faces the outside environment.
  • the second glass pane 2 forms the inner pane, which faces the vehicle interior.
  • Both glass panes 1, 2 are made of soda-lime glass.
  • the first glass pane 1 has a thickness of 2.1 mm
  • the second glass pane 2 has a thickness of 1.6 mm.
  • the intermediate layer 3 is made of PVB.
  • the first glass pane 1 (outer pane) has an outer surface I that faces the external environment and an interior surface II that faces the vehicle interior.
  • the second glass pane 2 (inner pane) has an outer surface III that faces the external environment and an interior surface IV that faces the vehicle interior.
  • the composite pane 10 has a lower edge U pointing downwards towards the engine of the passenger car and an upper edge O pointing upwards towards the roof.
  • the composite pane 10 is shown flat for simplicity, although real windshields typically have a spherical curvature.
  • the composite pane 10 has an opaque masking area M, which is arranged in a peripheral edge area and surrounds a transparent see-through area D in a frame-like manner. Such masking areas M are common in windshields - they primarily serve to protect the adhesive used to bond the composite pane 10 to the vehicle body from UV radiation.
  • the imaging unit 4 is a HUD projector. It is directed at a display area A of the composite pane 10, which is arranged in the viewing area D. In the display area A, the imaging unit 4 can generate display images which are perceived by a viewer 5 (vehicle driver) as virtual images on the side of the composite pane 10 facing away from him when his eyes are within the so-called eyebox E. This allows the viewer 5 to be shown status information (e.g. driving speed), navigation instructions (e.g. speed limits or directions) or warning symbols in particular without him having to take his eyes off the road.
  • status information e.g. driving speed
  • navigation instructions e.g. speed limits or directions
  • the imaging unit 4 irradiates the display area A with an angle of incidence a, which is measured to the interior surface normal of the second glass pane 2 (inner pane).
  • the angle of incidence a is, for example, 65°, which is comparatively close to the Brewster angle (about 57° for an air - soda-lime glass transition).
  • the radiation from the imaging unit 4 is p-polarized - it is therefore hardly reflected on the glass surfaces.
  • the composite pane 10 is equipped with a means which is suitable for reflecting the radiation of the imaging unit 4 in the direction of the eyebox E.
  • this means is a holographic element which is embedded in the display area A in the intermediate layer 3.
  • Figure 3 shows a cross section through a composite pane 10 of an embodiment of the arrangement for producing an optical display according to the invention.
  • the interior-side surface II of the first glass pane 1 (outer pane) has a black cover print 6 in the edge area, which forms the masking area M.
  • the intermediate layer 3 comprises a first thermoplastic layer 3a adjacent to the first glass pane 1 (outer pane) and a second thermoplastic layer 3b adjacent to the second glass pane 2 (inner pane) a second thermoplastic layer 3b.
  • the first thermoplastic layer 3a and the second thermoplastic layer 3b are each formed from a PVB film with a thickness of 0.76 mm.
  • a third thermoplastic layer is arranged between the first thermoplastic layer 3a and the second thermoplastic layer 3b, which is referred to as the capsule layer 3c in the sense of the invention. It is made of a PVB film with a thickness of 0.38 mm.
  • the capsule layer 3c has a cutout in which a holographic element 20 is inserted.
  • the holographic element 20 is surrounded by the capsule layer 3c in a frame-like manner.
  • the holographic element 20 completely covers the display area A.
  • the holographic element 20 is intended to reflect the radiation of the imaging unit 4 in order to generate the display image in the direction of the eyebox E.
  • a hologram is formed in the holographic element 20, which has light-diffractive properties with respect to the radiation of the imaging unit 4. The radiation is diffracted by the hologram in such a way that it is emitted in the direction of the eyebox E.
  • the hologram is a complex diffraction grating that is optimized for the wavelengths (RGB) and the angle of incidence a of the radiation from the imaging unit 4.
  • the hologram has no (or a significantly lower) light-diffractive effect on radiation of other wavelengths and radiation that falls at a different angle of incidence.
  • the hologram therefore has a very selective effect on the radiation from the imaging unit 4, so that, for example, disruptive reflection effects can be avoided.
  • Figure 4 shows a cross section through the holographic element 20 from Figure 3. It comprises a photopolymer layer 21 between a first glass layer 22 and a second glass layer 23.
  • the glass layers 22, 23 are made of aluminosilicate glass and each have a thickness of 100 pm.
  • the glass layers 22, 23 are chemically prestressed.
  • the photopolymer layer 21 has a thickness of 15 pm, for example, and consists of a photopolymer in which the light-diffracting hologram is formed.
  • the complex diffraction grating is realized in particular by refractive index modulations which were generated during the holographic exposure of the photopolymer.
  • the photopolymer layer 21 is arranged between polymer carrier films. Components of the intermediate layer 3 can diffuse through the carrier foils into the photopolymer layer 21. This impairs the hologram and adversely changes the selectively adjusted light-diffractive properties.
  • the glass layers 22, 23 act as diffusion barriers against components of the intermediate layer 3. Degradation of the hologram in the photopolymer layer 21 as a result of diffusion can thereby be prevented.
  • the glass layers 22, 23 give the holographic element 20 an advantageous rigidity.
  • the holographic element 20 does not form any waviness, as can occur with polymer carrier films during lamination of the composite pane as a result of shrinkage processes. Such waviness leads to a distorted, wavy display image, which is avoided by the glass layers 22, 23.
  • the holographic element 20 is provided with an edge seal 24, which is intended to prevent the diffusion of components of the intermediate layer 3 over the side edge into the photopolymer layer 21.
  • the edge seal 24 is formed, for example, by a band made of a suitable plastic (e.g. polyethylene terephthalate), which is attached all the way around the side edge of the holographic element 20 and in particular separates the side edge of the photopolymer layer 21 from the adjacent capsule layer 3c.
  • SiO2 layers applied from the gas phase, in particular sputtered, can be used.

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Abstract

La présente invention concerne un agencement pour produire un affichage optique, comprenant une vitre composite (10), comprenant une première vitre (1) et une seconde vitre (2) qui sont reliées l'une à l'autre par l'intermédiaire d'une couche intermédiaire thermoplastique (3), ayant une région d'affichage (A) et une unité d'imagerie (4) qui est dirigée vers la région d'affichage (A), au moins dans la région d'affichage (A), la vitre composite (10) étant équipée d'un élément holographique (20) qui est intégré dans la couche intermédiaire (3) et qui est approprié pour diffracter le rayonnement de l'unité d'imagerie (4) afin de produire une image d'affichage, et qui a une couche photopolymère (21), l'élément holographique (20) comprenant, dans l'ordre indiqué : une première couche de verre (22) ou une couche de SiO2, la couche photopolymère (21) et une seconde couche de verre (23) ou une couche de SiO2.
PCT/EP2024/056509 2023-03-30 2024-03-12 Agencement pour produire un affichage optique Pending WO2024199990A1 (fr)

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EP23165290 2023-03-30
EP23165290.0 2023-03-30

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WO2024199990A1 true WO2024199990A1 (fr) 2024-10-03

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US5066525A (en) * 1989-01-25 1991-11-19 Central Glass Company, Limited Laminated glass panel incorporating hologram sheet
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WO2009071135A1 (fr) 2007-12-07 2009-06-11 Saint-Gobain Glass France Pare-brise incurvé de véhicule fait à partir d'un verre feuilleté
EP1800855B1 (fr) 2005-12-26 2013-02-20 Asahi Glass Company, Limited Verre stratifié pour véhicules
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
WO2020167263A1 (fr) 2019-02-12 2020-08-20 Cy Vision A.S. Dispositif d'affichage tête haute holographique
US20200276792A1 (en) * 2015-12-14 2020-09-03 Saint-Gobain Glass France Laminated vehicle windshield with internal luminous sign(s)
EP3187917B1 (fr) 2014-10-14 2021-03-10 Fuyao Glass Industry Group Co., Ltd. Système d'affichage tête haute
WO2021104800A1 (fr) 2019-11-28 2021-06-03 Saint-Gobain Glass France Ensemble de projection pour un affichage tête haute (hud), avec un rayonnement à polarisation en p
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WO2022053403A1 (fr) 2020-09-14 2022-03-17 Saint-Gobain Glass France Panneau composite pour affichage tête haute holographique
WO2022107962A1 (fr) 2020-11-19 2022-05-27 주식회사 홀로랩 Système et procédé de fonctionnement pour un affichage tête haute holographique basé sur un élément de réseau de micromiroirs

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818045A (en) * 1987-12-29 1989-04-04 Kaiser Optical Systems Holographic optical element having periphery with gradually decreasing diffraction efficiency and method of construction
US5066525A (en) * 1989-01-25 1991-11-19 Central Glass Company, Limited Laminated glass panel incorporating hologram sheet
DE69019459T2 (de) * 1989-10-27 1995-09-28 Hughes Aircraft Co Polarisiertes holographisches "Head-up Display".
US5631107A (en) * 1994-02-18 1997-05-20 Nippondenso Co., Ltd. Method for producing optical member
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EP1880243A2 (fr) 2005-05-11 2008-01-23 E.I. Dupont De Nemours And Company Intercouches polymeres presentant un profil cuneiforme
EP1800855B1 (fr) 2005-12-26 2013-02-20 Asahi Glass Company, Limited Verre stratifié pour véhicules
WO2009071135A1 (fr) 2007-12-07 2009-06-11 Saint-Gobain Glass France Pare-brise incurvé de véhicule fait à partir d'un verre feuilleté
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
EP3187917B1 (fr) 2014-10-14 2021-03-10 Fuyao Glass Industry Group Co., Ltd. Système d'affichage tête haute
US20200276792A1 (en) * 2015-12-14 2020-09-03 Saint-Gobain Glass France Laminated vehicle windshield with internal luminous sign(s)
WO2020167263A1 (fr) 2019-02-12 2020-08-20 Cy Vision A.S. Dispositif d'affichage tête haute holographique
WO2021104800A1 (fr) 2019-11-28 2021-06-03 Saint-Gobain Glass France Ensemble de projection pour un affichage tête haute (hud), avec un rayonnement à polarisation en p
WO2021112302A1 (fr) 2019-12-06 2021-06-10 전자부품연구원 Procédé d'enregistrement d'un élément optique holographique pour affichage tête haute
WO2022053403A1 (fr) 2020-09-14 2022-03-17 Saint-Gobain Glass France Panneau composite pour affichage tête haute holographique
WO2022107962A1 (fr) 2020-11-19 2022-05-27 주식회사 홀로랩 Système et procédé de fonctionnement pour un affichage tête haute holographique basé sur un élément de réseau de micromiroirs

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