WO2019016548A1 - LAMINATED GLAZING - Google Patents

LAMINATED GLAZING Download PDF

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Publication number
WO2019016548A1
WO2019016548A1 PCT/GB2018/052033 GB2018052033W WO2019016548A1 WO 2019016548 A1 WO2019016548 A1 WO 2019016548A1 GB 2018052033 W GB2018052033 W GB 2018052033W WO 2019016548 A1 WO2019016548 A1 WO 2019016548A1
Authority
WO
WIPO (PCT)
Prior art keywords
pane
glazing
major surface
layer
reflection
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.)
Ceased
Application number
PCT/GB2018/052033
Other languages
English (en)
French (fr)
Inventor
Charlie James PATRICKSON
John Andrew Ridealgh
Joseph Jeremy Boote
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.)
Pilkington Group Ltd
Original Assignee
Pilkington Group Ltd
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 Pilkington Group Ltd filed Critical Pilkington Group Ltd
Priority to US16/632,050 priority Critical patent/US12319028B2/en
Priority to CN201880055347.2A priority patent/CN111051958B/zh
Priority to EP18749067.7A priority patent/EP3655813A1/en
Priority to JP2020502478A priority patent/JP7471217B2/ja
Publication of WO2019016548A1 publication Critical patent/WO2019016548A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • 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
    • B32B17/1011—Properties of the bulk of a glass sheet having predetermined tint or excitation purity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B32B17/10201—Dielectric coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B32B17/1022—Metallic coatings
    • B32B17/10229—Metallic layers sandwiched by dielectric layers
    • 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
    • B32B17/10788—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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • 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
    • B60K35/60—Instruments characterised by their location or relative disposition in or on vehicles
    • 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
    • C03C17/3602—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 the metal being present as a layer
    • C03C17/3618—Coatings of type glass/inorganic compound/other inorganic layers, at least one layer being metallic
    • 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
    • C03C17/3602—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 the metal being present as a layer
    • C03C17/3639—Multilayers containing at least two functional metal layers
    • 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
    • C03C17/3602—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 the metal being present as a layer
    • C03C17/3644—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 the metal being present as a layer the metal being silver
    • 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
    • C03C17/3602—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 the metal being present as a layer
    • C03C17/3649—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 the metal being present as a layer made of metals other than silver
    • 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
    • C03C17/3602—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 the metal being present as a layer
    • C03C17/3657—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 the metal being present as a layer the multilayer coating having optical properties
    • C03C17/366—Low-emissivity or solar control coatings
    • 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
    • C03C17/3602—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 the metal being present as a layer
    • C03C17/3681—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 the metal being present as a layer the multilayer coating being used in glazing, e.g. windows or windscreens
    • 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B2255/28—Multiple coating on one surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/416—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
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/08—Glass
    • 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
    • B32B2329/00—Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
    • B32B2329/06—PVB, i.e. polyinylbutyral
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2331/00—Polyvinylesters
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    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B2027/0192—Supplementary details
    • G02B2027/0194—Supplementary details with combiner of laminated type, for optical or mechanical aspects

Definitions

  • the present invention relates to a laminated glazing comprising at least two sheets of glazing material and at least one infrared reflecting coating therebetween, in particular a laminated vehicle glazing for use as a combiner in a head up display.
  • Head up display (HUD) systems for vehicles are well known.
  • a HUD has four basic parts, (i) a source of light, for displaying information to be shown to the driver of the vehicle, (ii) an electronic part comprising a microprocessor to process data and provide the information to be visualised, (iii) an optical system which carries the beam of light and focusses the image at a certain distance from the eyes of the driver, and (iv) a combiner which superimposes the image of the driving information on that of the outer environment.
  • a light source is configured for projection onto the inner facing surface of the windscreen (i.e. the surface facing the interior of the cabin of the vehicle) to be projected into the line of sight of the vehicle driver.
  • WO2010/035031A1 describes a laminated glazing for use as windscreen with a HUD.
  • An example is provided with two curved plies of glass each having a thickness of 1.8mm, tinted light green in colour with a light transmission (CIE Illuminant A) of 80%.
  • a PVB interlayer is used to bond the two glass plies together to produce the laminate, the PVB interlayer being pre-shaped and unshaped fully and partially wedged.
  • wedged PVB in HUD systems for vehicle windscreens can reduce the amount of "ghosting" (or secondary image) that the driver of the vehicle observes.
  • ghosting is due to the HUD light source being reflected from the air/glass interface at the inner surface of the windscreen to produce a primary image to be observed by the vehicle driver, and HUD light that is transmitted through the windscreen is reflected off the glass/air interface (the outer surface of the windscreen), also back towards the driver of the vehicle to produce a secondary image viewable by the vehicle drive, but slightly offset from the primary image.
  • the wedged interlayer i.e. PVB reduces the spacing between the primary image and the secondary image, see for example US5,013, 134.
  • EP0448522A2 describes a windshield for a motor vehicle that is provided with a transparent coating apt to simultaneously reduce the transmission of incident light energy and combine data relating to driving with the images of the outer environment.
  • the transparent coating has the capacity of screening sun radiation and sorting information deriving from an apparatus of the head-up display type. Examples are provided where a clear glass sheet is coated with a multilayer energy reflective coating, or where a layer of Ti0 2 is deposited on the inner facing surface of a windshield formed by a clear glass with a thickness of 2.4mm, an adhesive PVB layer of 0.76mm and by a green glass with a thickness of 2.4mm.
  • CN105459509A relates to a glass, and more particularly to a double-layer glass having better thermal insulation properties.
  • a laminated glazing is described comprising an inner flat glass and an outer flat glass with an infrared reflecting layer and an infrared absorbing layer arranged between the inner flat glass and the outer flat glass.
  • the infrared reflecting layer is located outside the infrared absorbing layer.
  • WO2015/056594A1 relates to an infrared shielding film and laminated glass in which colour unevenness is unlikely to occur.
  • WO2015/056594A1 provides an infrared shielding film comprising a phase difference film having an in-plane retardation of 110-150nm with respect to 550nm wavelength light, and an infrared reflecting layer which is disposed on at least one surface of the phase difference film.
  • EP2883847A1 describes an interlayer film for laminated glass which is high in heat shielding properties.
  • infrared reflecting coatings are also electrically conductive, so may be used to provide additional functionality to the windscreen, for example a heatable windscreen function whereby an electrical current may be passed through the infrared reflecting coating to enable the windscreen to be demisted or de-iced.
  • the present invention aims to at least partially overcome the problems discussed above.
  • the present invention provides from a first aspect a laminated glazing for use as a combiner in a head up display, the laminated glazing comprising at least two (a first and a second) panes of glazing material joined by an interlayer structure comprising at least one adhesive ply, each of the first and second panes of glazing material having respectively a first major surface and an opposing second major surface, wherein the laminated glazing is configured such that the second major surface of the first pane of glazing material faces the first major surface of the second pane of glazing material, there being an infrared reflecting film between the first and second panes of glazing material, further wherein the first major surface of the first pane of glazing material is an exposed surface of the laminated glazing such that light directed towards the first major surface of the first pane of glazing material at an angle of incidence of 60° to a normal on the first major surface of the first pane of glazing material is reflected off the laminated glazing to produce a first reflection, a second reflection and a third reflection, the first reflection being from light reflected from the first
  • the absolute intensity of the third reflection at 770nm is lower compared to the same laminated glazing without having the light intensity reducing means between the first major surface of the first pane of glazing material and the second major surface of the second pane of glazing material.
  • the light intensity reducing means selectively reduces the intensity of the third reflection whilst still allowing suitably high visible light to be transmitted through the laminated glazing.
  • the beam of electromagnetic radiation that is directed toward the first major surface of the first pane of glazing material at an angle of incidence of 60 ° to a normal on the first major surface of the first pane of glazing material is typically referred to as an incident beam.
  • the intensity of the third reflection at a particular wavelength is the mean average of the third reflection at that wavelength under both p and s polarised electromagnetic radiation.
  • the laminated glazing is configured such that the second major surface of the first pane of glazing material and the first major surface of the second pane of glazing material both face the infrared reflecting film.
  • the laminated glazing is configured such that the second major surface of the first pane of glazing material and the first major surface of the second pane of glazing material both face the at least one adhesive ply.
  • a pane of glazing material is often referred to as a ply of glazing material or a sheet of glazing material.
  • the light intensity reducing means is between the first major surface of the first pane of glazing material and the infrared reflecting film.
  • the light intensity reducing means comprises light absorbing means.
  • the intensity of the third reflection at 770nm is greater than or equal to 0.01 ⁇ I 0 when the incident beam of electromagnetic radiation has an intensity I 0 at a wavelength of 770nm.
  • the beam of electromagnetic radiation has an intensity I 0 at a wavelength of 660nm and the intensity of the third reflection at 660nm is less than or equal to 0.13 ⁇ I 0 .
  • the intensity of the third reflection at 660nm is greater than or equal to 0.005 ⁇ I 0 when the incident beam of electromagnetic radiation has an intensity I 0 at a wavelength of 660nm.
  • the beam of electromagnetic radiation has an intensity I 0 at a wavelength of 750nm and the intensity of the third reflection at 750nm is less than or equal to 0.17 ⁇ I 0 .
  • the intensity of the third reflection at 750nm is greater than or equal to 0.005 ⁇ I 0 when the incident beam of electromagnetic radiation has an intensity I 0 at a wavelength of 750nm.
  • light intensity reducing means is provided by the first pane of glazing material.
  • the first pane of glazing material comprises absorbing means for reducing the intensity of the third reflection.
  • the first pane of glazing material comprises glass, more preferably soda-lime-silica glass.
  • a typical soda-lime-silica glass composition is (by weight), Si0 2 69 - 74 %; A1 2 0 3 0 - 3 %; Na 2 0 10 - 16 %; K 2 0 0 - 5 %; MgO 0 - 6 %; CaO 5 - 14 %; S0 3 0 - 2 %; Fe 2 0 3 0.005 - 2 %.
  • the glass composition may also contain other additives, for example, refining aids, which would normally be present in an amount of up to 2 %.
  • the first pane of glazing material is a sheet of glass, in particular soda-lime-silica glass, comprising a colourant portion comprising iron oxide (Fe 2 0 3 ).
  • the level of iron oxide in the glass composition of the first pane of glazing material is between 0.15% and 2% by weight Fe 2 0 3 , more preferably between 0.2% and 1.5% by weight Fe 2 0 3 .
  • the first pane of glazing material comprises a coating on the second major surface thereof, and the coating comprises at least one light absorbing layer for reducing the intensity of the third reflection.
  • the coating on the second major surface of the first pane of glazing material may be part of the infrared reflecting film, or separate thereto.
  • the at least one light absorbing layer of the coating on the second major surface of the first pane of glazing material has a thickness between 0. lnm and 5nm, more preferably 0. lnm and 3nm, even more preferably 0.2nm and 2.5nm.
  • the at least one light absorbing layer of the coating on the second major surface of the first pane of glazing material comprises nichrome or an oxide or nitride of nichrome
  • oxides or nitrides of nichrome may be stoichiometric, sub-stoichiometric or super-stoichiometric.
  • light intensity reducing means is provided by the second pane of glazing material.
  • the second pane of glazing material comprises absorbing means for reducing the intensity of the third reflection.
  • the second pane of glazing material comprises glass, more preferably soda-lime- silica glass.
  • the second pane of glazing material is a sheet of glass, in particular soda-lime-silica glass, comprising a colourant portion including iron oxide (Fe 2 0 3 ).
  • the level of iron oxide in the glass composition of the second pane of glazing material is between 0.15% and 2% by weight Fe 2 0 3 , more preferably between 0.2% and 1.5% by weight Fe 2 0 3 .
  • the second pane of glazing material comprises a coating on the first major surface thereof, and the coating comprises at least one optical absorbing layer for reducing the intensity of the third reflection.
  • the coating on the first major surface of the second pane of glazing material may be part of the infrared reflecting film, or separate thereto.
  • the at least one light absorbing layer of the coating on the first major surface of the second pane of glazing material has a thickness between O. lnm and 5nm, more preferably between O. lnm and 3nm, even more preferably between 0.2nm and 2.5nm.
  • the at least one light absorbing layer of the coating on the first major surface of the second pane of glazing material comprises nichrome or an oxide or nitride of nichrome
  • These oxides or nitrides of nichrome may be stoichiometric, sub-stoichiometric or super-stoichiometric.
  • the second pane of glazing material has a higher transmission to visible light than the first pane of glazing material. The light transmission may be calculated according to CIE Illuminant C IO degree observer.
  • the second pane of glazing material comprises a sheet of soda-lime-silica glass having an iron oxide content between 0.001% and 0.19% by weight Fe 2 0 3 , preferably between 0.001% and 0.12% by weight Fe 2 0 3 , preferably between 0.001% and 0.1% by weight Fe 2 0 3 .
  • the infrared reflecting film is able to reflect solar radiation away from the first pane of glazing material and/or the interlayer structure. This helps reduce the amount of solar radiation that may be absorbed by the first pane of glazing material and/or the interlayer structure, thereby helping reduce the amount of heat transmitted away from the first pane of glazing material i.e. into the vehicle interior when the laminated glazing is installed in the vehicle with the first major surface of the first pane of glazing material facing the vehicle interior.
  • the first and/or second pane of glazing material is a glass sheet comprising more iron oxide (Fe 2 0 3 expressed as a percentage by weight) than clear float glass.
  • clear float glass it is meant a glass having a composition as defined in BS EN 572 1 and BS EN 572-2 (2012).
  • the Fe 2 0 3 level by weight is typically 0.11%.
  • Float glass with an Fe 2 0 3 content less than this level is typically referred to as low iron float glass.
  • Such glass usually has the same basic composition of the other component oxides i.e. low iron float glass is also a soda-lime- silicate glass, as is clear float glass.
  • a low iron float glass is usually made by using low iron containing raw materials.
  • low iron containing float glass contains between 0.001% and 0.07% by weight Fe 2 0 3 .
  • Fe 2 0 3 When Fe 2 0 3 is present in a glass, it can exist in two oxidation states, namely ferrous iron (Fe 2+ ) and ferric iron (Fe + ).
  • the total iron oxide Fe 2 0 3 content of a glass is usually quoted in terms of Fe 2 0 3 only, and the ratio of ferrous iron to ferric iron is quoted as a percentage of the total Fe 2 0 3 .
  • ferrous iron it is possible to determine ferrous iron by chemical techniques, although for low iron containing glass, the level of ferrous iron is low making other techniques more suitable.
  • One such technique is to measure the absorption of the glass at lOOOnm, as this is in the region of the peak absorption due to ferrous iron. It is then possible to determine the ferrous iron content using the well-known Lambert-beer law and an appropriate extinction coefficient for ferrous iron.
  • a method of optically determining the amount of ratio of ferrous iron to ferric iron in glass is described by C.R. Bamford in "Colour Control and Generation in Glass", Elsevier (1977).
  • the first glazing pane has a lower transmission to visible light than the second glazing pane.
  • first glazing pane and the second glazing pane having the same composition, but where the second glazing pane is thinner than the first glazing pane.
  • first glazing pane has a lower visible light transmission compared to the second glazing pane due to higher levels of colourants, in particular iron oxide, in the first glazing pane compared to the second glazing pane.
  • the light intensity reducing means for reducing the intensity of the third reflection comprises a further light absorbing glass sheet comprising one or more optical absorbers.
  • At least one of the optical absorbers of the further light absorbing glass sheet is iron oxide (Fe 2 0 3 ).
  • the iron oxide content of the further light absorbing glass sheet is between 0.001% and 2% by weight Fe 2 0 3 , preferably between 0.05% and 1% by weight Fe 2 0 3 .
  • the laminated glazing comprises a further light absorbing glass sheet
  • the further light absorbing glass sheet is joined to the first pane of glazing material via at least one adhesive ply and the further light absorbing glass sheet is joined to the second pane of glazing material via at least one adhesive ply
  • the light intensity reducing means for reducing the intensity of the third reflection comprises a tinted interlayer material.
  • This may be a tinted interlayer specifically included in the laminated glazing to reduce the intensity of the third reflection or may have one or more property serving other functions, for example acoustic dampening and/or being wedged.
  • the at least one adhesive ply comprises a tinted interlayer material.
  • the infrared reflecting film comprises at least one layer comprising silver.
  • the thickness of the at least one layer comprising silver is between 1 and 20nm, more preferably between 5 and 15nm.
  • the infrared reflecting film comprises at least one layer of silver, preferably wherein the thickness of the at least one layer of silver is between 1 and 20nm, more preferably between 5 and 15nm.
  • the infrared reflecting film comprises at least two layers, each of the at least two layers comprising silver.
  • the infrared reflecting film comprises at least three layers, each of the at least three layers comprising silver.
  • the light intensity reducing means for reducing the intensity of the third reflection comprises a light absorbing coating layer.
  • the infrared reflecting film comprises the light absorbing coating layer.
  • the light absorbing coating layer is on the second major surface of the first sheet of glazing material.
  • the light absorbing coating layer is on the first major surface of the second pane of glazing material.
  • the light absorbing coating layer comprises nichrome or an oxide or nitride of nichrome.
  • These oxides or nitrides of nichrome may be stoichiometric, sub-stoichiometric or super- stoichiometric.
  • the light absorbing coating layer has a thickness between 0. lnm and 5nm, more preferably between O. lnm and 3nm, even more preferably between 0.2nm and 2.5nm.
  • the infrared reflecting film is on the second major surface of the first pane of glazing material.
  • the infrared reflecting film when the infrared reflecting film is on the second major surface of the first pane of glazing material the infrared reflecting film may be in direct contact with the second major surface of the first pane of glazing material.
  • the infrared reflecting film is on the first major surface of the second pane of glazing material.
  • the infrared reflecting film when the infrared reflecting film is on the first major surface of the second pane of glazing material the infrared reflecting film may be in direct contact with the first major surface of the second pane of glazing material.
  • the infrared reflecting film is on a carrier ply, the carrier ply not being the first or second panes of glazing material.
  • the carrier ply may comprise glass, in particular soda-lime-silica glass.
  • the carrier ply comprises a plastic material, in particular polyethylene, especially polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the carrier ply is positioned between a first and a second adhesive ply, the first adhesive ply being between the first pane of glazing material and the carrier ply and the second adhesive ply being between the second pane of glazing material and the carrier ply.
  • the carrier ply is positioned in a cut-out region in an adhesive ply.
  • the adhesive ply with the cut-out region therein is positioned between first and second adhesive plies.
  • Embodiments of the first aspect of the present invention have other preferable features.
  • the first and/or second pane of glazing material is body tinted.
  • the thickness of the infrared reflecting film is between lOOnm and 300nm, more preferably between 150nm and 250nm, even more preferably between 160nm and 200nm.
  • the infrared reflecting film is a multilayer coating comprising at least one metal layer, in particular at least one silver layer.
  • the infrared reflecting film comprises at least one layer of ZnSnOx, ZnO or ZnO:Al, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises at least one layer of ZnSnOx spaced apart from the first or second pane of glazing material by at least one layer of silver.
  • the at least one ZnSnOx layer may be deposited by reactive sputtering from an approximately 50/50 wt% Zn:Sn target.
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, preferably wherein the first layer is ZnSnOx, ZnO or ZnO:Al, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises at least a first layer comprising silver in between a first layer of ZnSnOx, ZnO or ZnO:Al and a second layer of ZnSnOx, ZnO or ZnO:Al, preferably wherein the first layer of ZnSnOx, ZnO or ZnO:Al is in direct contact with the first or second pane of glazing material, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises a first layer comprising silver and a second layer comprising silver, the first layer comprising silver being between a first layer of ZnSnOx, ZnO or ZnO: Al and a second layer of ZnSnOx, ZnO or ZnO: Al, the first layer of ZnSnOx, ZnO or ZnO: Al preferably being in direct contact with the first or second pane of glazing material; and the second layer comprising silver being between the second layer of ZnSnOx, ZnO or ZnO:Al and a third layer of
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, the first layer being ZnSnOx and having a thickness between 25nm and 32nm,
  • the infrared reflecting film comprises a first layer of ZnSnOx having a thickness between 25nm and 32nm and being in direct contact with the first or second pane of glazing material, wherein the infrared reflecting film further comprises a layer of ZnOx having a thickness less than 7nm on the first layer of ZnSnOx.
  • the infrared reflecting film comprises a first layer of ZnSnOx having a thickness between 25nm and 32nm and being in direct contact with the first or second pane of glazing material, wherein the infrared reflecting film further comprises a second layer of ZnSnOx having a thickness between 75nm and 85nm and at least one layer of silver between the first and second layers of ZnSnOx, preferably wherein the at least one layer of silver has a thickness between 8nm and 13nm.
  • the infrared reflecting film comprises a first layer of ZnSnOx having a thickness between 25nm and 32nm and being in direct contact with the first or second pane of glazing material, a second layer of ZnSnOx having a thickness between 75nm and 85nm, and a layer of silver preferably having a thickness between 7nm and 13nm between the first and second layers of ZnSnOx, wherein the infrared reflecting film further comprises a third layer of ZnSnOx preferably having a thickness between 30nm and 45nm and another layer of silver between the second and third layers of ZnSnOx, the another layer of silver preferably having a thickness between 7nm and 15nm.
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, the first layer being ZnO or ZnO:Al and preferably having a thickness between 30nm and 40nm, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, the first layer being ZnO or ZnO: Al and preferably having a thickness between 30nm and 40nm, wherein the infrared reflecting film further comprises a second layer of ZnO or ZnO:Al with at least one layer of silver therebetween, the second layer of ZnO or ZnO:Al preferably having a thickness between 75nm and 85nm and the at least one layer of silver preferably having a thickness between 7nm and 13nm, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises a layer of SiOx and at least one layer comprising silver, the at least one layer comprising silver being between the first or second pane of glazing material and the layer of SiOx, more preferably wherein the layer of SiOx is an outermost layer of the infrared reflecting film.
  • the layer of SiOx may be deposited using a Si target containing up to 30wt% A1 2 0 3 so depositing an SiOx:Al layer, wherein said layer may containing up to 15wt% A1 2 0 3 .
  • the at least one adhesive ply comprises polyvinyl butyral (PVB), acoustic modified PVB, a copolymer of ethylene such as ethylene vinyl acetate (EVA), polyurethane (PU), polycarbonate, poly vinyl chloride (PVC) or a copolymer of ethylene and methacrylic acid.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetate
  • PU polyurethane
  • PVC polycarbonate
  • PVC poly vinyl chloride
  • the at least one adhesive ply has a thickness between 0.3mm and 2.3mm, preferably between 0.3mm and 1.6mm, more preferably between 0.3mm and 0.9mm.
  • the interlayer structure comprises at least two adhesive plies.
  • the interlayer structure comprises at least two adhesive plies spaced apart from one another.
  • the interlayer structure has less than twenty adhesive plies, more preferably less than ten adhesive plies, even more preferably less than five adhesive plies.
  • the interlayer structure has only one adhesive ply or only two adhesive plies or only three adhesive plies.
  • the laminated glazing has a visible light transmission (CIE Illuminant A 10 degree observer) of greater than 70% or 71% or 72% or 73% or 74% or 75%, more preferably between 70% and 80%.
  • CIE Illuminant A 10 degree observer a visible light transmission
  • the laminated glazing has a total transmitted solar (TTS%) measured using ISO 13837:2008 Convention A (with outside surface wind velocity Vi of approximately 4m/s) of less than 60%, more preferably less than 55%, even more preferably less than 50%.
  • TTS% measured using ISO 13837:2008 Convention A (with outside surface wind velocity Vi of approximately 4m/s) of less than 60%, more preferably less than 55%, even more preferably less than 50%.
  • the percentage of light reflected from the second major surface of the second pane of glazing material (CIE Illuminant D65 10 degree) observer is less than 12%, preferably less than 11%, more preferably less than 10%.
  • the light reflected from the second major surface of the second pane of glazing material (CIE Illuminant D65 10 degree observer) has an a* less than or equal to zero, preferably between -10 and zero.
  • the light reflected from the second major surface of the second pane of glazing material has a b* less than or equal to zero, preferably between -15 and zero, more preferably between -10 and zero.
  • the first pane of glazing material and the second pane of glazing material are not parallel to one another.
  • the second or third reflection may be displaced to be coincident with, or substantially coincident with, the first reflection. This may conveniently be achieved by using a wedge shaped interlayer between the first and second glazing panes.
  • the second reflection is displaced to be coincident with, or substantially coincident with, the first reflection by using a wedge shaped interlayer in between the first and second panes of glazing material.
  • the second major surface of the first glazing pane is a concave surface and the second major surface of the second glazing pane is an opposing convex surface.
  • the thickness of the first and/or second pane of glazing material is between 1mm and 4mm, preferably between 1.5 mm and 2.5mm.
  • the thickness of the laminated glazing is between 3mm and 10mm.
  • the laminated glazing is curved in at least one direction.
  • the radius of curvature in the at least one direction is between 500mm and 20000mm, more preferably between 1000mm and 8000mm.
  • the first pane of glazing material is a chemically strengthened glass pane and the second pane of glazing material is a sheet of soda-lime-silica glass.
  • the infrared reflecting film is on the first or second sheet of glazing material and the sheet resistance ( ⁇ /D) of the infrared reflecting film is between 2 ⁇ /D and 4 ⁇ /D, more preferably between 2.5 ⁇ /D and 3.5 ⁇ /D.
  • the infrared reflecting film is on the second major surface of the first sheet of glazing material and the sheet resistance ( ⁇ /D) of the infrared reflecting film is between 2 ⁇ /D and 4 ⁇ /D, more preferably between 2.5 ⁇ /D and 3.5 ⁇ /D.
  • the infrared reflecting film is on the first major surface of the second sheet of glazing material and the sheet resistance ( ⁇ /D) of the infrared reflecting film is between 2 ⁇ /D and 4 ⁇ /D, more preferably between 2.5 ⁇ /D and 3.5 ⁇ /D.
  • the laminated glazing is a vehicle windscreen.
  • the present invention provides use of one or more optical absorber for reducing the intensity of a third reflection produced by a laminated glazing when an incident beam of light strikes an exposed surface of a laminated glazing
  • the laminated glazing comprising at least two (a first and a second) panes of glazing material joined by an interlayer structure comprising at least one adhesive ply, each of the first and second panes of glazing material having respectively a first major surface and an opposing major surface
  • the laminated glazing being configured such that the second major surface of the first pane of glazing material faces the first major surface of the second pane of glazing material, there being an infrared reflecting film between the first and second panes of glazing material, wherein the first major surface of the first pane of glazing material is the exposed surface of the laminated glazing such that the beam of light directed towards the first major surface of the first pane of glazing material at an angle of incidence is reflected off the laminated glazing to produce a first reflection, a second reflection and the third reflection, the first reflection being from light reflected from the first major
  • the laminated glazing is a vehicle windscreen.
  • the optical absorber is between the first major surface of the first pane of glazing material and the infrared reflecting film.
  • the tinted interlayer ply is an adhesive tinted interlayer ply, more preferably tinted PVB or tinted EVA.
  • the adhesive tinted interlayer ply is the at least one adhesive ply.
  • the tinted interlayer ply comprises PET.
  • the first pane of glazing material comprises the body tinted glazing pane.
  • the first pane of glazing material is the body tinted glazing pane.
  • the body tinted glazing pane comprises an iron oxide content between 0.15% and 2% by weight Fe 2 0 3 , more preferably between 0.2% and 1.5% by weight Fe 2 0 3 .
  • the body tinted glazing pane comprises soda-lime-silica glass.
  • the coating layer comprises nichrome or an oxide or nitride of nichrome.
  • the oxides or nitrides of nichrome may be stoichiometric, sub-stoichiometric or super-stoichiometric.
  • the coating layer has a thickness between 0. lnm and 5nm, more preferably between 0. lnm and 3nm, even more preferably between 0.2nm and 2.5nm.
  • the optical absorber is used to reduce the intensity of the third reflection such that upon directing a beam of electromagnetic radiation having an intensity I 0 at 770nm toward the first major surface of the first pane of glazing material at an angle of incidence of 60 ° to a normal on the first major surface of the first pane of glazing material, the intensity of the third reflection at a wavelength of 770nm is less than or equal to 0.185 ⁇ I 0 .
  • the optical absorber is used to reduce the intensity of the third reflection such that upon directing a beam of electromagnetic radiation having an intensity I 0 at 660nm toward the first major surface of the first pane of glazing material at an angle of incidence of 60 ° to a normal on the first major surface of the first pane of glazing material, the intensity of the third reflection at a wavelength of 660nm is less than or equal to 0.13 ⁇ I 0 .
  • the optical absorber is used to reduce the intensity of the third reflection such that upon directing a beam of electromagnetic radiation having an intensity I 0 at 750nm toward the first major surface of the first pane of glazing material at an angle of incidence of 60 ° to a normal on the first major surface of the first pane of glazing material, the intensity of the third reflection at a wavelength of 750nm is less than or equal to 0.17 ⁇ I 0 .
  • the optical absorber is used to reduce the absolute intensity of the third reflection at one or more wavelength.
  • the thickness of the infrared reflecting film is between lOOnm and 300nm, more preferably between 150nm and 250nm, even more preferably between 160nm and 200nm.
  • the infrared reflecting film is a multilayer coating comprising at least one metal layer, in particular at least one silver layer.
  • the infrared reflecting film comprises at least one layer of ZnSnOx, ZnO or ZnO:Al, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises at least one layer of ZnSnOx spaced apart from the first or second pane of glazing material by at least one layer of silver.
  • the at least one ZnSnOx layer may be deposited by reactive sputtering from an approximately 50/50 wt% Zn: Sn target.
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, preferably wherein the first layer is ZnSnOx, ZnO or ZnO:Al, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises at least a first layer comprising silver in between a first layer of ZnSnOx, ZnO or ZnO:Al and a second layer of ZnSnOx, ZnO or ZnO:Al, preferably wherein the first layer of ZnSnOx, ZnO or ZnO:Al is in direct contact with the first or second pane of glazing material, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises a first layer comprising silver and a second layer comprising silver, the first layer comprising silver being between a first layer of ZnSnOx, ZnO or ZnO:Al and a second layer of ZnSnOx, ZnO or ZnO:Al, the first layer of ZnSnOx, ZnO or ZnO:Al preferably being in direct contact with the first or second pane of glazing material; and the second layer comprising silver being between the second layer of ZnSnOx, ZnO or ZnO: Al and a third layer of ZnSnOx, ZnO or ZnO:Al, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, the first layer being ZnSnOx and having a thickness between 25nm and 32nm,
  • the infrared reflecting film comprises a first layer of ZnSnOx having a thickness between 25nm and 32nm and being in direct contact with the first or second pane of glazing material, wherein the infrared reflecting film further comprises a layer of ZnOx having a thickness less than 7nm on the first layer of ZnSnOx.
  • the infrared reflecting film comprises a first layer of ZnSnOx having a thickness between 25nm and 32nm and being in direct contact with the first or second pane of glazing material, wherein the infrared reflecting film further comprises a second layer of ZnSnOx having a thickness between 75nm and 85nm and at least one layer of silver between the first and second layers of ZnSnOx, preferably wherein the at least one layer of silver has a thickness between 8nm and 13nm.
  • the infrared reflecting film comprises a first layer of ZnSnOx having a thickness between 25nm and 32nm and being in direct contact with the first or second pane of glazing material, a second layer of ZnSnOx having a thickness between 75nm and 85nm, and a layer of silver preferably having a thickness between 7nm and 13nm between the first and second layers of ZnSnOx, wherein the infrared reflecting film further comprises a third layer of ZnSnOx preferably having a thickness between 30nm and 45nm and another layer of silver between the second and third layers of ZnSnOx, the another layer of silver preferably having a thickness between 7nm and 15nm.
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, the first layer being ZnO or ZnO:Al and preferably having a thickness between 30nm and 40nm, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, the first layer being ZnO or ZnO:Al and preferably having a thickness between 30nm and 40nm, wherein the infrared reflecting film further comprises a second layer of ZnO or ZnO:Al with at least one layer of silver therebetween, the second layer of ZnO or ZnO: Al preferably having a thickness between 75nm and 85nm and the at least one layer of silver preferably having a thickness between 7nm and 13nm, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises a layer of SiOx and at least one layer comprising silver, the at least one layer comprising silver being between the first or second pane of glazing material and the layer of SiOx, more preferably wherein the layer of SiOx is an outermost layer of the infrared reflecting film.
  • the layer of SiOx may be deposited using a Si target containing up to 30wt% A1 2 0 3 so depositing an SiOx:Al layer, wherein said layer may containing up to 15wt% A1 2 0 3 .
  • the at least one adhesive ply comprises polyvinyl butyral (PVB), acoustic modified PVB, a copolymer of ethylene such as ethylene vinyl acetate (EVA), polyurethane (PU), polycarbonate, poly vinyl chloride (PVC) or a copolymer of ethylene and methacrylic acid.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetate
  • PU polyurethane
  • PVC polycarbonate
  • PVC poly vinyl chloride
  • the at least one adhesive ply has a thickness between 0.3mm and 2.3mm, preferably between 0.3mm and 1.6mm, more preferably between 0.3mm and 0.9mm.
  • the interlayer structure comprises at least two adhesive plies.
  • the interlayer structure comprises at least two adhesive plies spaced apart from one another.
  • the interlayer structure has less than twenty adhesive plies, more preferably less than ten adhesive plies, even more preferably less than five adhesive plies.
  • the interlayer structure has only one adhesive ply or only two adhesive plies or only three adhesive plies.
  • the present invention provides a laminated glazing comprising at least two
  • first and a second panes of glazing material joined by an interlayer structure comprising at least one adhesive ply, each of the first and second panes of glazing material having respectively a first major surface and an opposing major surface
  • the laminated glazing is configured such that the second major surface of the first pane of glazing material faces the first major surface of the second pane of glazing material, there being an infrared reflecting film between the first and second panes of glazing material
  • the first major surface of the first pane of glazing material is an exposed surface of the laminated glazing such that light directed towards the first major surface of the first pane of glazing material at an angle of incidence is reflected off the laminated glazing to produce a first reflection, a second reflection and a third reflection, the first reflection being from light reflected from the first major surface of the first pane of glazing material, the second reflection being from light reflected from the second major surface of the second pane of glazing material and the third reflection being from light reflected from the infrared reflecting film
  • the laminated glazing comprises between the first
  • the laminated glazing may be used as a combiner in a head up display.
  • the light intensity reducing means is between the first major surface of the first pane of glazing material and the infrared reflecting film.
  • the light intensity reducing means comprises light absorbing means.
  • the laminated glazing comprises between the first major surface of the first pane of glazing material and the second major surface of the second pane of glazing material light intensity reducing means for reducing the intensity of the third reflection such that upon directing a beam of electromagnetic radiation having an intensity I 0 at 770nm toward the first major surface of the first pane of glazing material at an angle of incidence of 60 ° to a normal on the on the first major surface of the first pane of glazing material, the intensity of the third reflection at a wavelength of 770nm is less than or equal to 0.185 ⁇ I 0 .
  • the intensity of the third reflection at a particular wavelength is the mean average of the third reflection at that wavelength under both p and s polarised electromagnetic radiation.
  • the third aspect of the present invention has other preferable features similar to the first aspect of the present invention previously described.
  • the laminated glazing comprises between the first major surface of the first pane of glazing material and the second major surface of the second pane of glazing material light intensity reducing means for reducing the intensity of the third reflection such that upon directing a beam of electromagnetic radiation having an intensity I 0 at 60nm toward the first major surface of the first pane of glazing material at an angle of incidence of 60 ° to a normal on the on the first major surface of the first pane of glazing material, the intensity of the third reflection at a wavelength of 660nm is less than or equal to 0.13 ⁇ I 0 .
  • the laminated glazing comprises between the first major surface of the first pane of glazing material and the second major surface of the second pane of glazing material light intensity reducing means for reducing the intensity of the third reflection such that upon directing a beam of electromagnetic radiation having an intensity I 0 at 750nm toward the first major surface of the first pane of glazing material at an angle of incidence of 60 ° to a normal on the on the first major surface of the first pane of glazing material, the intensity of the third reflection at a wavelength of 750nm is less than or equal to 0.17 ⁇ I 0 .
  • the light intensity reducing means is provided by the first pane of glazing material.
  • the first pane of glazing material comprises absorbing means for reducing the intensity of the third reflection.
  • the first pane of glazing material comprises glass, more preferably soda-lime-silica glass.
  • a typical soda-lime-silica glass composition is (by weight), Si0 2 69 - 74 %; A1 2 0 3 0 - 3 %; Na 2 0 10 - 16 %; K 2 0 0 - 5 %; MgO 0 - 6 %; CaO 5 - 14 %; S0 3 0 - 2 %; Fe 2 0 3 0.005 - 2 %.
  • the glass composition may also contain other additives, for example, refining aids, which would normally be present in an amount of up to 2 %.
  • the first pane of glazing material is a sheet of glass, in particular soda-lime-silica glass, comprising a colourant portion comprising iron oxide (Fe 2 0 3 ).
  • the level of iron oxide in the glass composition of the first pane of glazing material is between 0.15% and 2% by weight Fe 2 0 3 , more preferably between 0.2% and 1.5% by weight Fe 2 0 3 .
  • the first pane of glazing material comprises a coating on the second major surface thereof, and the coating comprises at least one light absorbing layer for reducing the intensity of the third reflection.
  • the coating on the second major surface of the first pane of glazing material may be part of the infrared reflecting film, or separate thereto.
  • the at least one light absorbing layer of the coating on the second major surface of the first pane of glazing material has a thickness between O. lnm and 5nm, more preferably O. lnm and 3nm, even more preferably 0.2nm and 2.5nm.
  • the at least one light absorbing layer of the coating on the second major surface of the first pane of glazing material comprises nichrome or an oxide or nitride of nichrome
  • oxides or nitrides of nichrome may be stoichiometric, sub-stoichiometric or super-stoichiometric.
  • the second pane of glazing material comprises a coating on the first major surface thereof, and the coating comprises at least one optical absorbing layer for reducing the intensity of the third reflection.
  • the coating on the first major surface of the second pane of glazing material may be part of the infrared reflecting film, or separate thereto.
  • the at least one light absorbing layer of the coating on the first major surface of the second pane of glazing material has a thickness between O. lnm and 5nm, more preferably between O. lnm and 3nm, even more preferably between 0.2nm and 2.5nm.
  • the at least one light absorbing layer of the coating on the first major surface of the second pane of glazing material comprises nichrome or an oxide or nitride of nichrome These oxides or nitrides of nichrome may be stoichiometric, sub-stoichiometric or super-stoichiometric.
  • the infrared reflecting film comprises at least one layer comprising silver.
  • the thickness of the at least one layer comprising silver is between 1 and 20nm, more preferably between 5 and 15nm.
  • the infrared reflecting film comprises at least one layer of silver, preferably wherein the thickness of the at least one layer of silver is between 1 and 20nm, more preferably between 5 and 15nm.
  • the infrared reflecting film comprises at least two layers, each of the at least two layers comprising silver.
  • the infrared reflecting film comprises at least three layers, each of the at least three layers comprising silver.
  • the light intensity reducing means for reducing the intensity of the third reflection comprises a light absorbing coating layer.
  • the infrared reflecting film comprises the light absorbing coating layer.
  • the light absorbing coating layer is on the second major surface of the first sheet of glazing material.
  • the light absorbing coating layer is on the first major surface of the second pane of glazing material.
  • the light absorbing coating layer comprises nichrome or an oxide or nitride of nichrome.
  • These oxides or nitrides of nichrome may be stoichiometric, sub-stoichiometric or super- stoichiometric.
  • the light absorbing coating layer has a thickness between 0. lnm and 5nm, more preferably between O. lnm and 3nm, even more preferably between 0.2nm and 2.5nm.
  • the infrared reflecting film is on the second major surface of the first pane of glazing material.
  • the infrared reflecting film is on the first major surface of the second pane of glazing material. In some embodiments the infrared reflecting film is on a carrier ply, the carrier ply not being the first or second panes of glazing material.
  • Embodiments of the third aspect of the present invention have other preferable features.
  • the first and/or second pane of glazing material is body tinted.
  • the thickness of the infrared reflecting film is between lOOnm an 300nm, more preferably between 150nm and 250nm, even more preferably between 160nm and 200nm.
  • the infrared reflecting film is a multilayer coating comprising at least one metal layer, in particular at least one silver layer.
  • the infrared reflecting film comprises at least one layer of ZnSnOx, ZnO or ZnO:Al, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises at least one layer of ZnSnOx spaced apart from the first or second pane of glazing material by at least one layer of silver.
  • the at least one ZnSnOx layer may be deposited by reactive sputtering from an approximately 50/50 wt% Zn:Sn target.
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, preferably wherein the first layer is ZnSnOx, ZnO or ZnO:Al, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises at least a first layer comprising silver in between a first layer of ZnSnOx, ZnO or ZnO:Al and a second layer of ZnSnOx, ZnO or ZnO: Al, preferably wherein the first layer of ZnSnOx, ZnO or ZnO:Al is in direct contact with the first or second pane of glazing material, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises a first layer comprising silver and a second layer comprising silver, the first layer comprising silver being between a first layer of ZnSnOx, ZnO or ZnO:Al and a second layer of ZnSnOx, ZnO or ZnO:Al, the first layer of ZnSnOx, ZnO or ZnO:Al preferably being in direct contact with the first or second pane of glazing material; and the second layer comprising silver being between the second layer of ZnSnOx, ZnO or ZnO: Al and a third layer of ZnSnOx, ZnO or ZnO:Al, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, the first layer being ZnSnOx and having a thickness between 25nm and 32nm
  • the infrared reflecting film comprises a first layer of ZnSnOx having a thickness between 25nm and 32nm and being in direct contact with the first or second pane of glazing material, wherein the infrared reflecting film further comprises a layer of ZnOx having a thickness less than 7nm on the first layer of ZnSnOx.
  • the infrared reflecting film comprises a first layer of ZnSnOx having a thickness between 25nm and 32nm and being in direct contact with the first or second pane of glazing material, wherein the infrared reflecting film further comprises a second layer of ZnSnOx having a thickness between 75nm and 85nm and at least one layer of silver between the first and second layers of ZnSnOx, preferably wherein the at least one layer of silver has a thickness between 8nm and 13nm.
  • the infrared reflecting film comprises a first layer of ZnSnOx having a thickness between 25nm and 32nm and being in direct contact with the first or second pane of glazing material, a second layer of ZnSnOx having a thickness between 75nm and 85nm, and a layer of silver preferably having a thickness between 7nm and 13nm between the first and second layers of ZnSnOx, wherein the infrared reflecting film further comprises a third layer of ZnSnOx preferably having a thickness between 30nm and 45nm and another layer of silver between the second and third layers of ZnSnOx, the another layer of silver preferably having a thickness between 7nm and 15nm.
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, the first layer being ZnO or ZnO:Al and preferably having a thickness between 30nm and 40nm, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises a first layer in direct contact with the first or second pane of glazing material, the first layer being ZnO or ZnO:Al and preferably having a thickness between 30nm and 40nm, wherein the infrared reflecting film further comprises a second layer of ZnO or ZnO:Al with at least one layer of silver therebetween, the second layer of ZnO or ZnO: Al preferably having a thickness between 75nm and 85nm and the at least one layer of silver preferably having a thickness between 7nm and 13nm, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the infrared reflecting film comprises a layer of SiOx and at least one layer comprising silver, the at least one layer comprising silver being between the first or second pane of glazing material and the layer of SiOx, more preferably wherein the layer of SiOx is an outermost layer of the infrared reflecting film.
  • the layer of SiOx may be deposited using a Si target containing up to 30wt% A1 2 0 3 so depositing an SiOx:Al layer, wherein said layer may containing up to 15wt% A1 2 0 3 .
  • the at least one adhesive ply comprises polyvinyl butyral (PVB), acoustic modified PVB, a copolymer of ethylene such as ethylene vinyl acetate (EVA), polyurethane (PU), polycarbonate, poly vinyl chloride (PVC) or a copolymer of ethylene and methacrylic acid.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetate
  • PU polyurethane
  • PVC polycarbonate
  • PVC poly vinyl chloride
  • the at least one adhesive ply has a thickness between 0.3mm and 2.3mm, preferably between 0.3mm and 1.6mm, more preferably between 0.3mm and 0.9mm.
  • the interlayer structure comprises at least two adhesive plies.
  • the interlayer structure comprises at least two adhesive plies spaced apart from one another.
  • the interlayer structure has less than twenty adhesive plies, more preferably less than ten adhesive plies, even more preferably less than five adhesive plies.
  • the interlayer structure has only one adhesive ply or only two adhesive plies or only three adhesive plies.
  • the laminated glazing has a visible light transmission (CIE Illuminant A 10 degree observer) of greater than 70% or 71% or 72% or 73% or 74% or 75%, more preferably between 70% and 80%.
  • CIE Illuminant A 10 degree observer a visible light transmission
  • the laminated glazing has a total transmitted solar (TTS% measured using ISO 13837:2008 Convention A (with outside surface wind velocity Vi of approximately 4m/s) of less than 60%, more preferably less than 55%, even more preferably less than 50%.
  • TTS% measured using ISO 13837:2008 Convention A (with outside surface wind velocity Vi of approximately 4m/s) of less than 60%, more preferably less than 55%, even more preferably less than 50%.
  • the percentage of light reflected from the second major surface of the second pane of glazing material CIE Illuminant D65 10 degree observer is less than 12%, preferably less than 11%, more preferably less than 10%.
  • the light reflected from the second major surface of the second pane of glazing material (CIE Illuminant D65 10 degree observer) has an a* less than or equal to zero, preferably between -10 and zero.
  • the light reflected from the second major surface of the second pane of glazing material (CIE Illuminant D65 10 degree observer) has a b* less than or equal to zero, preferably between -15 and zero, more preferably between -10 and zero.
  • first pane of glazing material and the second pane of glazing material are not parallel to one another.
  • second major surface of the first glazing pane is a concave surface and the second major surface of the second glazing pane is an opposing convex surface.
  • the thickness of the first and/or second pane of glazing material is between 1mm and 4mm, preferably between 1.5 mm and 2.5mm.
  • the thickness of the laminated glazing is between 3mm and 10mm.
  • the laminated glazing is curved in at least one direction.
  • the radius of curvature in the at least one direction is between 500mm and 20000mm, more preferably between 1000mm and 8000mm.
  • the first pane of glazing material is a chemically strengthened glass pane and the second pane of glazing material is a sheet of soda-lime-silica glass.
  • the infrared reflecting film is on the first or second sheet of glazing material and the sheet resistance ( ⁇ /D) of the infrared reflecting film is between 2 ⁇ /D and 4 ⁇ /D, more preferably between 2.5 ⁇ /D and 3.5 ⁇ /D.
  • the infrared reflecting film is on the second major surface of the first sheet of glazing material and the sheet resistance ( ⁇ /D) of the infrared reflecting film is between 2 ⁇ /D and 4 ⁇ /D, more preferably between 2.5 ⁇ /D and 3.5 ⁇ /D.
  • the infrared reflecting film is on the first major surface of the second sheet of glazing material and the sheet resistance ( ⁇ /D) of the infrared reflecting film is between 2 ⁇ /D and 4 ⁇ /D, more preferably between 2.5 ⁇ /D and 3.5 ⁇ /D.
  • Figure 1 shows a cross section through a laminated glazing such as a vehicle windscreen to indicate the light paths from a head up display illumination source;
  • Figure 2 shows a cross section through a laminated glazing where reflection from a major surface has been supressed
  • Figure 3 shows a cross section through a single pane of glass where reflection from a major surface has been supressed
  • Figure 4 shows the spectral distribution of the third reflection between 600nm and 800nm from different laminated glazings determined using an incident beam at an angle of 60° to a normal on the glazing surface;
  • Figure 5 shows the spectral distribution of the third reflection between 380nm and 780nm from different laminated glazings determined using an incident beam at an angle of 60° to a normal on the glazing surface
  • Figure 6 shows the spectral distribution of the third reflection between 600nm and 800nm from different laminated glazings determined using an s -polarised incident beam at an angle of 60° to a normal on the glazing surface
  • Figure 7 shows the spectral distribution of the third reflection between 380nm and 780nm from different laminated glazings determined using an s -polarised incident beam at an angle of 60° to a normal on the glazing surface.
  • Figure 1 shows a schematic cross section of a laminated glazing 1, for example a vehicle windscreen.
  • the laminated glazing 1 comprises a first sheet of glass 3 and a second sheet of glass 5. Both glass sheets 3, 5 have a soda-lime-silica composition.
  • the laminated glazing 1 is shown as being flat (or planar) in cross section, typically the laminated glazing 1 would have a convex outer surface (facing the sun) and an opposing concave inner surface. Glass bending processes are well known in the art for shaping a flat glass sheet, for example gravity sag bending or press bending between complementary bending members a heat softened glass sheet.
  • the first sheet of glass 3 is joined to the second sheet of glass 5 by an adhesive interlayer ply 7.
  • the adhesive interlayer material is PVB, but other adhesive interlayers materials are known in the art, for example ethylene vinyl acetate (EVA).
  • EVA ethylene vinyl acetate
  • the adhesive interlayer ply 7 is not tinted in the visible region, but may be. Instead of a single adhesive interlayer ply 7, there may be two or more adhesive interlayers plies, one or more of which may be tinted.
  • the first sheet of glass 3 is uncoated whereas the second sheet of glass 5 has an infrared reflecting film 9 on the major surface thereof facing the interlayer ply 7.
  • the interlayer ply 7 is in direct contact with the infrared reflecting film 9.
  • the infrared reflecting film 9 may be deposited on the major surface of the second sheet of glass using atmospheric pressure chemical vapour deposition and/or magnetron sputtering. When the laminated glazing is curved as described above, the infrared reflecting film may be deposited before or after the glass bending process.
  • the infrared reflecting film 9 is a multilayer coating comprising two silver layers.
  • a suitable layer configuration for the infrared reflecting film 9 is given in table 1.
  • the infrared reflecting film of table 1 may be deposited using AC and/or DC magnetron sputtering devices, medium-frequency, pulsed DC, or bipolar pulsed DC sputtering being applied where appropriate.
  • Dielectric layers of an oxide of Zn and Sn (ZnSnOx, weight ratio Zn : Sn ⁇ 50 : 50) may be reactively sputtered from zinc -tin targets in an Ar/0 2 sputter atmosphere.
  • the weight ratio of Zn to Sn in a ZnSnOx layer may be between 40 and 60% by weight i.e. a ZnSnOx layer, weight ratio Zn : Sn ⁇ 40 : 60 and a ZnSnOx layer, weight ratio Zn : Sn ⁇ 60 : 40.
  • Layers of silver (Ag) may consist of essentially pure silver (Ag) and may be sputtered from silver targets in an Ar sputter atmosphere without any added oxygen and at a partial pressure of residual oxygen below 10-5 mbar.
  • Layers of Ti may be sputtered from titanium targets (99.9% purity) and act as a barrier layer for the silver layer beneath.
  • the layer of Ti so deposited may be oxidised upon depositing a subsequent layer thereon, such that the layer of Ti is oxidised to TiOx, where x may be about 2.
  • Ti0 2 layers may be directly deposited using slightly substoichiometric conductive Ti Ox targets (where x is about 1.98) in a pure Ar sputter atmosphere without added oxygen.
  • Layers of ZnO:Al may be sputtered from conductive ZnOx:Al targets in a pure Ar sputter atmosphere, with or without low levels of added oxygen.
  • ZnO:Al layers may also be sputtered from Al- doped Zn targets (with an Al content about 2 wt.%) in an Ar/0 2 sputter atmosphere.
  • ZnOx layers may be sputtered from Zn targets in an Ar/0 2 sputter atmosphere.
  • Suboxidic NiCrOx layers may be sputtered from Nig 0 Cr 20 targets in an Ar / 0 2 sputter atmosphere.
  • Layers of SiOx may be deposited using a Si target containing up to 30wt% A1 2 0 3 so depositing an SiOx:Al layer, i.e. said SiOx layer may contain up to 15wt% A1 2 0 3 .
  • the multilayer coating shown in table 1 was deposited on the major surface of the second glass sheet 5 using magnetron sputtering. As shown in table 1, there is a ZnSnOx layer adjacent the glass surface.
  • Other example infrared reflecting films are provided in table 3, Samples 1-4.
  • the infrared reflecting film in table 1 is also provided in table 3 for Sample 5.
  • the PVB interlayer ply 7 is not a wedged PVB interlayer, although the PVB interlayer may be a wedged PVB interlayer.
  • Layer Layer thickness (nm) is not a wedged PVB interlayer, although the PVB interlayer may be a wedged PVB interlayer.
  • the outer facing major surface 11 of the laminated glazing 1 (i.e. the major surface facing the sun) is known as "surface one" or simply "S I".
  • the opposing major surface of the second glass sheet 5 is “surface two", or “S2" of the laminated glazing 1.
  • the major surface 13 of the sheet of first sheet of glass 3 is referred to as “surface four", or “S4" of the laminated glazing 1.
  • the opposing major surface of the first glass sheet 3 is referred to as "surface three", or "S3" of the laminated glazing 1.
  • the first sheet of glass 3 is usually known as the inner pane or the inner ply of the windscreen and the second sheet of glass 5 is usually known as the outer pane or the outer ply of the windscreen.
  • the laminated glazing 1 may be manufactured using conventional laminating conditions using high temperature and pressure, for example subjecting the unlaminated stack of individual components to a temperature of about 100 °C to 150 °C and pressure of about 5 to 15 atmospheres.
  • Figure 1 illustrates how three images may be observed when the laminated glazing is viewed in a horizontal direction with the laminated glazing 1 inclined at an angle 15 to the horizontal. This illustrates the situation when the laminated glazing 1 is installed as a windscreen in a vehicle, and the driver of the vehicle looks through the windscreen (i.e. laminated glazing 1) towards the road ahead.
  • a light source 17 Positioned below the laminated glazing 1 is a light source 17 configured to shine an incident beam of light 19 onto the major surface 13.
  • the light source 17 may be part of a HUD system and may be a white light source.
  • the incident beam of light 19 is perpendicular to the horizontal (and is therefore vertical.
  • the incident beam of light 19 is at an angle 18 to a normal 20 on the major surface 13. Since the incident beam of light is vertical, the angle 15 to the horizontal is the same as the angle 18 to a normal on the glass surface 13.
  • the incident beam of light 19 strikes the major surface 13 and a percentage of the incident light beam is reflected off the major surface 13 as reflected beam 21 to give a first reflection.
  • the reflected beam 21 is also at an angle 18 to the normal 20 on the glass surface 13.
  • FIG. 1 illustrates, some of the incident beam of light 19 from the light source 17 is transmitted through the major surface 13 and gets refracted upon passing the air/glass boundary. Some of the incident beam of light is able to pass through the first glass sheet 3, the adhesive interlayer ply 7, the infrared reflecting film 9 and the glass sheet 5 to be reflected off the glass/air boundary (i.e. major surface 11) to emerge through the major surface 13 as reflected beam 23 to give a second reflection.
  • An observer 27 positioned to view the glazing as illustrated will see three images, a first image
  • the use of a wedged interlayer ply such as wedged PVB may bring the first and second images 2 ⁇ , 23' into coincidence but it is not possible to bring all three images 2 ⁇ , 23' and 25' into coincidence using a wedged interlayer ply instead of interlayer ply 7.
  • the first image 2 ⁇ is usually the brightest and the first reflected beam 21 has a wavelength distribution essentially the same as the wavelength distribution of the incident light beam 19.
  • the wavelength distribution of the second and third reflected beams 23, 25 depends on the nature of the glass sheets, 3, 5, the adhesive interlayer ply 7 and the infrared reflecting film 9.
  • the three images are distracting for the driver of the vehicle.
  • a suitable light source 17 Whilst it may be possible to choose a suitable light source 17 in an attempt to minimise the visibility of the third image 25', it is particularly desirable to provide a laminated glazing that may be usable with different light sources, in particular different white light sources, having unknown spectral distributions.
  • spectrophotometer allows a complete sample characterisation to be made, and allows absolute reflection measurements to be made at variable angles and polarization.
  • the absolute reflection spectrum of the laminated glazing 1 was determined by positioning the laminated glazing (or a portion thereof) in the sample housing of the spectrophotometer so that the angle of incidence to a normal on the sample surface was 60 ° . The light reflected from the laminated glazing was then captured by the
  • the spectrophotometer to measure the p and s polarization states in reflection separately at discussed above.
  • the light source 17 was that provided by the spectrophotometer and the observer 27 was the detector system provided by the spectrophotometer (shown as detector 29 in figures 2 and 3).
  • the reflected light measured by the spectrophotometer will contain light from the first, second and third reflected beams 21, 23 and 25. This makes it very difficult to obtain the spectral distribution of each individual reflected beam 21, 23 and 25. Accordingly the samples were treated before being measured to suppress the reflection from the major surface 11 of the second sheet of glass 5 i.e. the major surface of the laminated glazing opposite the major surface where the light was incident i.e. the surface intended to be "surface one" of the laminated glazing when installed in a vehicle was treated.
  • This reflection was suppressed by sand blasting the major surface 11 and/or painting the major surface 11 with black paint.
  • the configuration of the CARY 7000 UMS spectrophotometer also meant that if there was still any reflection from the treated surface, the scattered light was not collected by the detector.
  • the treated laminated glazing was again inserted into the sample housing of the spectrophotometer for measurement at an angle of incidence of 60 ° as before.
  • the spectrophotometer measures light only from the first and third reflected beams 21 and 25 i.e. the detector 29 of the spectrophotometer measures the combined reflection from the beams 21, 25. Again the s and p polarisation states were measured in reflection separately.
  • a single glass sheet 3 was measured in the spectrophotometer as before at an angle of incidence of 60 ° with the reflection from the back surface suppressed in the same way as described above. This is illustrated in figure 3 where the sand blasted surface of the glass sheet 3 is labelled as 13'. In the configuration shown in figure 3, there is no reflection from the light source 17 off surface 13' towards the detector 29 from light that passes through the surface 13. Again the s and p polarisation states were measured in reflection separately.
  • 1 R is the reflection measurement at wavelength A made by the spectrophotometer using >-polarised electromagnetic radiation
  • SPl is the reflection at wavelength A of the first reflected beam 21 under s-polarised electromagnetic radiation
  • 5 3 is the reflection at wavelength A of the third reflected beam 25 under s-polarised electromagnetic radiation
  • SPl ⁇ is the reflection at wavelength A of the first reflected beam 21 under >-polarised electromagnetic radiation
  • SP3 ⁇ is the reflection at wavelength A of the third reflected beam 25 under >-polarised electromagnetic radiation.
  • the absolute reflection 1 R at wavelength A is given by equation (4) and is the mean average of the reflection measurements made using both s and p polarised electromagnetic radiation. With reference to figure 3, another set of measurements were made using the
  • spectrophotometer and detector 29 measures the reflection that is due only to the reflected beam 21 :
  • A is the wavelength in nanometres
  • 2 fff is the reflection measurement at wavelength A made by the spectrophotometer using s -polarised electromagnetic radiation
  • R V is the reflection measurement at wavelength A made by the spectrophotometer using >-polarised electromagnetic radiation.
  • the parameters is given by equation (7) and is the mean average of the reflection measurements made using both s and p polarised electromagnetic radiation.
  • S R is the absolute reflection at wavelength A of the third reflected beam 25 due to reflection from the infrared reflecting film 9 in between the two sheets of glass 3, 5 of the laminated glazing 1.
  • the parameter 3 R ⁇ is dependent upon the angle of incidence of the incident beam of electromagnetic radiation, which in the above was at an angle of 60° to a normal on the sample surface. Accordingly it may be convenient to refer to a parameter 6Q R ⁇ where the subscript "60" refers to the angle of incidence (in degrees) of the incident beam of electromagnetic radiation to a normal on the sample surface.
  • the infrared reflecting film 9 is configured to reflect infrared energy in the direction "surface 2" ⁇ "surface 1" i.e. to prevent infrared energy passing into the vehicle in which the laminated glazing 1 is installed.
  • 3 R ⁇ varies with wavelength over the visible part of the spectrum and over other selected wavelength regions, for example 600nm to 800nm as shown in figure 4.
  • a typical human eye is sensitive to wavelengths in the 380nm to 780nm range, so monitoring the amount of absolute reflection in the red end of the visible spectrum provides a useful guide to the intensity of the third image observable by a driver of a vehicle when the laminated glazing 1 is installed in a vehicle.
  • the laminated glazing "Comp A” was made to illustrate the difficulty in achieving good solar control properties (high visible light transmission and low TTS%) and is an example of a type of infrared reflecting film that is commercially available.
  • the glass sheet 3 would be denoted as the inner pane and the glass sheet 5 would be denoted as the outer pane.
  • the infrared reflecting film was on the first major surface of the outer pane of glass and is therefore positioned in the laminated glazing as shown in figure 1 i.e. between major surface 11 and the adhesive interlayer ply 7 on the first major surface of the second glass sheet 5. As previously discussed, using conventional nomenclature this is surface two of the laminated glazing 1.
  • samples 1-5 each have the ZnSnOx layer highlighted in bold (also referred to as layer / ' ) in direct contact with the glass sheet 5.
  • the nichrome containing layer is a sub-stoichiometric oxide NiCrOx, although this layer may be a metal layer of NiCr or an oxide or nitride of nichrome with varying stoichiometry.
  • a layer of Ti may be fully or partially oxidised (to TiOx) upon depositing a subsequent oxide layer thereon, such as a layer of ZnSnOx.
  • SiOx layers may contain A1 2 0 3 up to 15% by weight (i.e. an SiOx:Al layer) depending upon the exact type of target used during sputtering.
  • Cylear float glass a glass having a composition as defined in BS EN 572 1 and BS EN 572-2 (2012).
  • the total iron oxide content of the clear float glass was about 0.082% by weight Fe 2 0 3 with a ferrous content expressed as Fe 2 0 3 of 27.3%.
  • Light Green Float Glass it is meant a soda-lime-silica glass composition (i.e. float glass) having an iron oxide of 0.56% by weight Fe 2 0 3 at a ferrous content expressed as Fe 2 0 3 of 24.5%.
  • a tinted float glass composition is often made by adding the desired level of colourants "on top” of a clear float glass batch composition, or at the expense of silica in the glass composition.
  • a clear float batch composition is used to make a clear float glass having a composition as defined in BS EN 572 1 and BS EN 572-2 (2012).
  • each layer was deposited using magnetron sputtering as previously discussed with reference to the coating shown in table 1.
  • Other vacuum deposition processes i.e. which are usually performed at a pressure of lower than about 0.1 mbar
  • sputtering, reactive sputtering, evaporation and other forms of physical vapour deposition may be used to prepare the infrared reflecting film, for example sputtering, reactive sputtering, evaporation and other forms of physical vapour deposition.
  • layer / ' and/or layer / ' / ' may be a layer of ZnO or ZnO:Al, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • layer / ' and / ' / ' may be replaced by a single layer / ' *, the single layer / ' * being in direct contact with the glass sheet 5 on one side and the layer / ' / ' / ' on the opposite side.
  • the single layer / ' * may be ZnSnOx, ZnOx, ZnO or ZnO:Al, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% A1 2 0 3 .
  • the layer / ' and layer / ' / ' may be the same material and may be ZnSnOx, ZnOx, ZnO or ZnO:Al, where ZnO:Al is ZnO doped with A1 2 0 3 , typically at a level of about 3wt% Al 2 0 3 .
  • the infrared reflecting film may have a layer of ZnSnOx, ZnO or ZnO:Al in direct contact with the glass surface.
  • the infrared reflecting film may have a first layer comprising silver (i.e. a first layer of silver) in between a first layer of ZnSnOx, ZnO or ZnO:Al and a second layer of ZnSnOx, ZnO or ZnO:Al, the first layer of ZnSnOx, ZnO or ZnO:Al being in direct contact with the glass surface.
  • a first layer comprising silver (i.e. a first layer of silver) in between a first layer of ZnSnOx, ZnO or ZnO:Al and a second layer of ZnSnOx, ZnO or ZnO:Al, the first layer of ZnSnOx, ZnO or ZnO:Al being in direct contact with the glass surface.
  • the infrared reflecting film may have a first layer comprising silver (i.e. a first layer of silver) and a second layer comprising silver (i.e. a second layer of silver), the first layer comprising silver being between a first layer of ZnSnOx, ZnO or ZnO: Al and a second layer of ZnSnOx, ZnO or ZnO: Al, the first layer of ZnSnOx, ZnO or ZnO:Al being in direct contact with the glass surface; and the second layer comprising silver being between the second layer of ZnSnOx, ZnO or ZnO: Al and a third layer of ZnSnOx, ZnO or ZnO:Al.
  • the infrared reflecting film may have a layer of SiOx, where at least one layer comprising silver is between the glass and the layer of SiOx. It is preferred for the layer of SiOx to be an outermost layer of the infrared reflecting film, for example there may be no other coating layer on the SiOx layer.
  • a layer of SiOx may be deposited using a Si target containing up to 30wt% A1 2 0 3 such that an SiOx:Al layer is deposited that may contain up to 15wt% A1 2 0 3 .
  • the columns headed "Rext a*" and “Rext b*” in table 4 are values of the reflected colour from "surface 1" of the glazing (Illuminant D65 10 degree observer) i.e. with reference to figure 1, the reflected colour from major surface 11.
  • TTS (%) shows the total transmitted solar values calculated in accordance with ISO 13837:2008 Convention A with outside wind velocity Vi of approximately 4m/s as specified in Appendix B, section B.2 of said standard.
  • the column headed "Sheet Resistance ( ⁇ /D)" in table 4 is the sheet resistance of the coated glass sheet (coating side) prior to being incorporated into the laminated glazing. Instruments to make such sheet resistance measurements are commercially available, see for example NAGY, Messsysteme GmbH, Siedlerstr. 34, 71126 Gaufelden, Germany.
  • Sheet resistance may be an important parameter when the laminated glazing is to be used as a vehicle windscreen wherein the electrically conductive coating that reduces the amount of infrared energy entering the vehicle cabin in which the laminated glazing is installed may also be used to provide a heatable glazing function to reduce misting of the windscreen.
  • the values of the absolute reflection 3 R ⁇ for the third reflected beam as a function of wavelength from the laminated glazings determined as described above (i.e. at an angle of incidence of 60° to a normal on the first major surface of the first pane of glazing material, using a double beam spectrophotometer and equations 1-8) are illustrated in figure 4 over the wavelength region 600-800nm and in figure 5 over the wavelength region 380-780nm.
  • Specific absolute reflection values 3 R ⁇ for the third reflection (in %) at certain wavelengths taken from figure 4 and figure 5 are given in table 5.
  • Sample 1 which has a light green float glass inner pane and a clear float glass outer pane, has a much reduced value of the absolute reflection 3 R ⁇ for the third reflected beam at 770nm compared to sample Comp A (12.8% for Sample 1 compared to 34.84% for Comp A). Note that sample Comp A has both inner and outer panes of clear float glass.
  • Sample 1 has an absolute reflection 3 R ⁇ of 12.80%, meaning that compared to the reference beam at 770nm, the intensity of the third reflection determined according to the above (see also equations 1-8) at 770nm is 0.1280 ⁇ I 0 , where I 0 is the intensity of the reference beam at 770nm. That is, the absolute reflection 3 R ⁇ of the third reflected beam at 770nm is 12.80%.
  • Sample 2 which has both the inner and outer panes of clear float glass, has an infrared reflecting film on surface 2 comprising a layer of NiCrOx.
  • the NiCrOx layer of Sample 2 reduces the intensity of the absolute reflection of the third reflected beam compared to the sample Comp A, but not to the same extent as for Sample 1.
  • the intensity of the third reflected beam may be further reduced by using a thicker NiCrOx layer.
  • Sample 3 is similar to Sample 1 and has acceptable Tvis (%) and TTS (%) for use as a vehicle windscreen.
  • Sample 4 has a more neutral colour in reflection from surface 1 of the laminated glazing which may be more desirable in certain applications.
  • Sample 5 has a similar intensity of the absolute reflection of the third reflected beam third compared to Sample 4. That is, for Sample 5 the absolute reflection of the third reflected beam at 770nm is 9.36% compared to 9.37% for Sample 4.
  • Samples 1, 3, 4 and 5 have the inner pane (i.e. glass sheet 3) of the laminated glazing as a sheet of soda-lime-silica glass containing 0.56% by weight iron oxide (Fe 2 0 3 ) and the outer pane (i.e. glass sheet 5) as a sheet of clear float glass containing about 0.082% by weight iron oxide (Fe 2 0 3 ), although it is preferred for the content of iron oxide in the outer pane to be lower i.e. 0.001-0.07% by weight Fe 2 0 3 .
  • the outer pane may have an iron oxide content in the region 0.001- 0.15% by weight Fe 2 0 3 or 0.001-0.12% by weight Fe 2 0 3 .
  • the iron oxide content in the inner pane (i.e. sheet of glass 3) provides the laminated glazing 1 with means to reduce the intensity of the third reflected beam 25. Furthermore, the colour of the third reflection i.e. third image 25' may become more neutral compared to the laminated glazing having an inner pane of clear float glass.
  • Sample 2 both the inner and outer panes of glass were clear float glass having an iron oxide (Fe 2 0 3 ) content of about 0.0.082% by weight.
  • Sample 2 has an infrared reflecting film 9 having a 1.95nm thick sub stoichiometric nichrome oxide layer to help selectively absorb the third reflected beam 25, thereby reducing the intensity of the third image 25' viewable by an observer.
  • a laminated glazing according to the present invention finds particular application as a vehicle windscreen, where the vehicle windscreen may be used as a combiner in a head up display system.
  • a head up display (HUD) system it may be desirable to use an optical system that has a light source having a particular polarisation state, for example the light source of the optical system of the HUD may be s-polarised or >-polarised.
  • the amount of specular reflection from a glass surface is a function of the angle of incidence and the polarisation state of the incident beam. For example, at an air/glass interface, at the Brewster angle an incident beam of >-polarised light has zero reflection and is fully refracted through the glass. In contrast, for an incident beam of s -polarised light at the Brewster angle, the reflectivity is not zero and an amount of the incident beam is reflected.
  • n 2 is the refractive index of glass
  • n j is the refractive index of air.
  • ⁇ ⁇ is about 56.7° to a normal on the glass surface.
  • equation (10) the reflection at wavelength A of the third reflected beam 25 under s -polarised electromagnetic radiation
  • ⁇ 3 is the reflection at wavelength A of the third reflected beam 25 under s -polarised electromagnetic radiation.
  • Figure 6 is a graph showing the variation with wavelength between 600nm and 800nm of the reflected intensity of the third reflected beam using an incident beam of s-polarised electromagnetic radiation at an angle of incidence of 60° to a normal on the glass surface i.e. figure 6 shows the parameter S 3 as described above and calculated using equation (10). As expected there are strong similarities between the data presented in figures 4 and 6 because the angle of incidence is close to the Brewster angle.
  • the values of the SP3 _ parameter at 660nm, 750nm, 770nm and 800nm are provided in table 6 for an incident beam of s -polarised electromagnetic radiation at an angle of incidence of 60° to a normal on the glass surface.
  • Figure 7 is a similar to figure 6 and is a graph showing the variation with wavelength between 380nm and 780nm of the reflected intensity of the third reflected beam using an incident beam of 5-polarised electromagnetic radiation at an angle of incidence of 60° to a normal on the glass surface. Again as expected, there are similarities with the data presented in figures 5 and 7 because the angle of incidence is close to the Brewster angle.
  • the present invention provides a laminated glazing for use as a windscreen.
  • the windscreen may be used as a combiner in a head up display system.
  • embodiments of the present invention have lower absolute reflection at 770nm which translates to a reduced intensity third image being seen by the driver of the vehicle.

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EP18749067.7A EP3655813A1 (en) 2017-07-18 2018-07-18 Laminated glazing
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CN106526854A (zh) * 2016-11-15 2017-03-22 福耀玻璃工业集团股份有限公司 一种能够电加热的汽车抬头显示系统

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JP2023502257A (ja) * 2019-11-21 2023-01-23 テスラ，インコーポレイテッド 車両用耐久ガラス
US12174374B2 (en) 2019-11-28 2024-12-24 Saint-Gobain Glass France Projection assembly for a head-up display (HUD) with p-polarised radiation
WO2021104800A1 (de) 2019-11-28 2021-06-03 Saint-Gobain Glass France Projektionsanordnung für ein head-up-display (hud) mit p-polarisierter strahlung
KR20220085794A (ko) * 2019-11-28 2022-06-22 쌩-고벵 글래스 프랑스 P 편광 방사선을 갖는 헤드업 디스플레이(hud)을 위한 프로젝션 어셈블리
KR102760092B1 (ko) * 2019-11-28 2025-01-31 쌩-고벵 글래스 프랑스 P 편광 방사선을 갖는 헤드업 디스플레이(hud)을 위한 프로젝션 어셈블리
CN114829989A (zh) * 2019-11-28 2022-07-29 法国圣戈班玻璃厂 用于平视显示器（HUD）的具有p偏振辐射的投影装置
CN114829989B (zh) * 2019-11-28 2024-10-29 法国圣戈班玻璃厂 用于平视显示器（HUD）的具有p偏振辐射的投影装置
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CN114710955A (zh) * 2020-10-28 2022-07-05 法国圣戈班玻璃厂 用于平视显示器（HUD）的具有p偏振辐射的投影装置
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EP3655813A1 (en) 2020-05-27
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US12319028B2 (en) 2025-06-03
CN111051958B (zh) 2023-04-28
US20200147935A1 (en) 2020-05-14
GB201711553D0 (en) 2017-08-30

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