DE102017113985A1 - Vehicle window with disk body and liquid crystal arrangement arranged on the inside - Google Patents

Vehicle window with disk body and liquid crystal arrangement arranged on the inside Download PDF

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Publication number
DE102017113985A1
DE102017113985A1 DE102017113985.0A DE102017113985A DE102017113985A1 DE 102017113985 A1 DE102017113985 A1 DE 102017113985A1 DE 102017113985 A DE102017113985 A DE 102017113985A DE 102017113985 A1 DE102017113985 A1 DE 102017113985A1
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DE
Germany
Prior art keywords
vehicle window
liquid crystal
layer
disk body
vehicle
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.)
Withdrawn
Application number
DE102017113985.0A
Other languages
German (de)
Inventor
Daniela Baierl
Steffen Lorenz
Jonas Dietrich
Max Buchmann
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.)
Webasto SE
Original Assignee
Webasto SE
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 Webasto SE filed Critical Webasto SE
Priority to DE102017113985.0A priority Critical patent/DE102017113985A1/en
Priority to PCT/EP2018/064086 priority patent/WO2018233989A1/en
Publication of DE102017113985A1 publication Critical patent/DE102017113985A1/en
Withdrawn legal-status Critical Current

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    • 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
    • B32B17/10541—Functional features of the laminated safety glass or glazing comprising a light source or a light guide
    • 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
    • B32B17/10018—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 only one glass sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10082—Properties of the bulk of a glass sheet
    • B32B17/10119—Properties of the bulk of a glass sheet having a composition deviating from the basic composition of soda-lime glass, e.g. borosilicate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—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
    • B32B17/10128—Treatment of at least one glass sheet
    • B32B17/10137—Chemical strengthening
    • 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
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/10467—Variable transmission
    • B32B17/10495—Variable transmission optoelectronic, i.e. optical valve
    • B32B17/10504—Liquid crystal layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • 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
    • B32B17/10733—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 epoxy
    • 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
    • B32B17/10743—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 acrylate (co)polymers or salts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/1077—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10788—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing ethylene vinylacetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • 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
    • B32B17/10798—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 silicone
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10816—Making laminated safety glass or glazing; Apparatus therefor by pressing
    • B32B17/10825—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts
    • B32B17/10834—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid
    • B32B17/10844—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid using a membrane between the layered product and the fluid
    • B32B17/10853—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid using a membrane between the layered product and the fluid the membrane being bag-shaped
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    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10816—Making laminated safety glass or glazing; Apparatus therefor by pressing
    • B32B17/10871—Making laminated safety glass or glazing; Apparatus therefor by pressing in combination with particular heat treatment
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
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    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
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    • G—PHYSICS
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    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
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    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
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    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/54—Arrangements for reducing warping-twist
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Structural Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Sciences (AREA)
  • Architecture (AREA)
  • General Chemical & Material Sciences (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Liquid Crystal (AREA)

Abstract

Es wird eine Fahrzeugscheibe vorgeschlagen, die einen plattenartigen Scheibenkörper (16) umfasst, der eine einer Fahrzeugumgebung zugewandte Außenseite und eine der Außenseite abgewandte Innenseite hat und an dessen Innenseite eine Beschattungsanordnung angeordnet ist, die aus einer Flüssigkristallanordnung (22) gebildet ist, die eine Flüssigkristallzelle (32) umfasst, Die Flüssigkristallanordnung (22) umfasst zwei Schichten (28, 30) aus biegsamem Dünnglas, zwischen denen die Flüssigkristallzelle (32) angeordnet ist.The invention relates to a vehicle windshield comprising a plate-like disk body (16) which has an outer side facing the vehicle environment and an inner side facing away from the outer side, and on the inside of which a shading arrangement is formed, which is formed from a liquid crystal arrangement (22) comprising a liquid crystal cell The liquid crystal device (22) comprises two layers (28, 30) of flexible thin glass, between which the liquid crystal cell (32) is arranged.

Description

Die Erfindung betrifft eine Fahrzeugscheibe mit den Merkmalen des Oberbegriffs des Patentanspruchs 1.The invention relates to a vehicle window with the features of the preamble of patent claim 1.

Eine derartige Fahrzeugscheibe ist aus der Praxis bekannt und kann ein verstellbares oder festes Dachelement eines Kraftfahrzeuges sein. Die Fahrzeugscheibe umfasst einen plattenartigen Scheibenkörper, der in der Regel aus Glas besteht und die Außenhaut des Dachelementes bildet. An seiner Innenseite ist der Scheibenkörper mit einer Flüssigkristallanordnung versehen, die elektrisch schaltbar ist und so die Lichtdurchlässigkeit der Fahrzeugscheibe vorgibt. In Abhängigkeit vom Schaltzustand der Flüssigkristallanordnung ist die Fahrzeugscheibe entweder weitgehend lichtdurchlässig oder weitgehend lichtundurchlässig, so dass sie eine Beschattungsanordnung bildet.Such a vehicle window is known from practice and may be an adjustable or fixed roof element of a motor vehicle. The vehicle window comprises a plate-like disk body, which as a rule consists of glass and forms the outer skin of the roof element. On its inside, the disk body is provided with a liquid crystal arrangement which is electrically switchable and thus defines the transparency of the vehicle window. Depending on the switching state of the liquid crystal device, the vehicle window is either largely translucent or substantially opaque, so that it forms a shading arrangement.

Des Weiteren ist es bekannt, Flüssigkristalle in Tröpfchenform in ein Polymer einzubinden. Im Grundzustand sind die Flüssigkristalle ungeordnet, weswegen im Wesentlichen keine Lichttransmission möglich ist. Es liegt ein milchiges Erscheinungsbild vor. Wenn hingegen an die entsprechende Flüssigkristallzellen Spannung angelegt wird, richten sich die Flüssigkristalle aus, wodurch Licht transmittiert werden kann.Furthermore, it is known to incorporate liquid crystals in droplet form in a polymer. In the ground state, the liquid crystals are disordered, which is why essentially no light transmission is possible. There is a milky appearance. On the other hand, when voltage is applied to the corresponding liquid crystal cells, the liquid crystals align, whereby light can be transmitted.

Ferner ist es bekannt, bei Fahrzeugscheiben sogenannte SPD (Suspended Particle Device)-Folien einzusetzen, um eine Beschattungseinrichtung bereitzustellen. Eine SPD-Folie umfasst in einer entsprechenden Zelle kleine, stäbchenförmige Partikel, die in einen dünnen Kunststofffilm eingebunden und zunächst willkürlich ausgerichtet sind. Unter einem elektrischen Feld richten sich diese Partikel aus, so dass Licht transmittiert werden kann. Jedoch besteht das Problem, dass solche SPD-Folien nur in blau und nicht in einer neutralen Farbe herstellbar sind, die bei einem Kraftfahrzeug ohne weiteres eingesetzt werden kann.Furthermore, it is known to use so-called SPD (Suspended Particle Device) films in vehicle windows in order to provide a shading device. An SPD film comprises small, rod-shaped particles in a corresponding cell, which are embedded in a thin plastic film and initially aligned arbitrarily. Under an electric field, these particles align so that light can be transmitted. However, there is the problem that such SPD films can only be produced in blue and not in a neutral color, which can be readily used in a motor vehicle.

Bisher besteht grundsätzlich das Problem, gewölbte Fahrzeugscheiben, insbesondere dreidimensional gewölbte Fahrzeugscheiben mit einer Flüssigkristallanordnung als Beschattungsanordnung zu versehen, die eine gleichmäßige Beschattung mit geringem Transmissionsgrad ermöglicht.So far, there is basically the problem of providing curved vehicle windows, in particular three-dimensionally curved vehicle windows, with a liquid crystal arrangement as a shading arrangement, which enables uniform shading with a low degree of transmission.

Der Erfindung liegt die Aufgabe zugrunde, eine Fahrzeugscheibe gemäß der einleitend genannten Gattung ausgebildete Fahrzeugscheibe zu schaffen, die eine Flüssigkristallanordnung mit gleichmäßigem Beschattungsverhalten auch bei einem dreidimensional gewölbten Scheibenkörper aufweist.The invention has for its object to provide a vehicle window according to the initially mentioned type formed vehicle window, which has a liquid crystal arrangement with uniform shading behavior even with a three-dimensionally curved disk body.

Diese Aufgabe ist erfindungsgemäß durch die Fahrzeugscheibe mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved by the vehicle window with the features of claim 1.

Erfindungsgemäß wird also eine Fahrzeugscheibe vorgeschlagen, die einen plattenartigen, planen oder gewölbten Scheibenkörper umfasst, der eine einer Fahrzeugumgebung zugewandte Außenseite und einer der Außenseite abgewandte Innenseite hat und an dessen Innenseite eine Beschattungsanordnung angeordnet ist, die aus einer Flüssigkristallanordnung gebildet ist, welche eine Flüssigkristallzelle umfasst. Die Flüssigkristallanordnung umfasst zwei Schichten aus biegsamem Dünnglas, zwischen denen die Flüssigkristallzelle angeordnet ist.According to the invention, therefore, a vehicle window is proposed which comprises a plate-like, planar or curved window body which has an outer side facing away from the vehicle surroundings and an inner side facing away from the outer side, and on the inner side thereof is arranged a shading arrangement which is formed from a liquid crystal arrangement comprising a liquid crystal cell , The liquid crystal device comprises two layers of flexible thin glass, between which the liquid crystal cell is arranged.

Durch die Anordnung der Flüssigkristallzelle zwischen zwei biegsamen Dünnglasschichten kann die Flüssigkristallanordnung der insbesondere gewölbten Form des plattenartigen Scheibenkörpers folgen, der aus Glas oder einem Kunststoff, wie einem Polycarbonat oder PMMA bestehen kann. Bei der Montage der Fahrzeugscheibe nach der Erfindung ist damit eine gute Verformbarkeit der Flüssigkristallanordnung gewährleistet. Zudem kann eine homogene Dicke der Flüssigkristallzelle über ihre Erstreckung trotz Verformung der beiden Dünnglasschichten erzielt werden.By arranging the liquid crystal cell between two flexible thin glass layers, the liquid crystal device can follow the particular curved shape of the plate-like disk body, which can be made of glass or a plastic such as a polycarbonate or PMMA. When mounting the vehicle window according to the invention, a good deformability of the liquid crystal arrangement is ensured. In addition, a homogeneous thickness of the liquid crystal cell can be achieved over its extension despite deformation of the two thin glass layers.

Bei dem für die Flüssigkristallanordnung der Fahrzeugscheibe nach der Erfindung verwendeten Dünnglas handelt es sich insbesondere um ein chemisch vorgespanntes Glas, das der Gruppe der Alumosilikatgläser zugeordnet sein kann und biegsam ausgebildet ist. Ein solches Glas zeichnet sich durch eine hohe Bruch- und Kratzfestigkeit aus.The thin glass used for the liquid crystal arrangement of the vehicle window pane according to the invention is, in particular, a chemically toughened glass which may be assigned to the group of aluminosilicate glasses and has a flexible design. Such a glass is characterized by a high resistance to breakage and scratching.

Vorzugsweise haben die Schichten aus biegsamem Dünnglas jeweils eine Dicke von 0,1 mm bis 1,5 mm. Durch die geringen Schichtdicken kann das Gesamtgewicht der Fahrzeugscheibe nach der Erfindung niedrig gehalten werden.Preferably, the layers of flexible thin glass each have a thickness of 0.1 mm to 1.5 mm. Due to the low layer thicknesses, the total weight of the vehicle window can be kept low according to the invention.

Die Verwendung der Dünnglasschichten für die Flüssigkristallanordnung verhindert eine Feuchtediffusion durch die von den Dünnglasschichten gebildeten Substrate der Flüssigkristallanordnung. Zudem hat das Dünnglas eine hohe thermische und mechanische Stabilität. Damit kann Wölbungen und Welligkeiten, die in der Flüssigkristallzelle zu Flüssigkeitsansammlungen und/oder Fehlstellen führen könnten, entgegengewirkt werden. Des Weiteren kann die Flüssigkristallanordnung direkt die innere Sichtfläche der Fahrzeugscheibe nach der Erfindung bilden, da das Dünnglas an sich schon eine hohe optische Anmutung haben kann.The use of the thin glass layers for the liquid crystal device prevents moisture diffusion through the substrates of the liquid crystal device formed by the thin glass layers. In addition, the thin glass has a high thermal and mechanical stability. This can be counteracted bulges and ripples, which could lead to liquid accumulation and / or defects in the liquid crystal cell. Furthermore, the liquid crystal device can directly form the inner visible surface of the vehicle window according to the invention, since the thin glass itself can already have a high visual appearance.

Bei einer speziellen Ausführungsform der Fahrzeugscheibe nach der Erfindung hat der Scheibenkörper entlang einer Scheibenlängsrichtung und entlang einer Scheibenquerrichtung jeweils eine Wölbung. Damit liegt eine dreidimensionale Wölbung des Scheibenkörpers vor. Die Wölbung kann jeweils einen Krümmungsradius zwischen 1.000 mm und 10.000 mm, vorzugsweise zwischen 2.000 mm und 5.000 mm haben. Über die Wölbung, das heißt in Scheibenquerrichtung und/oder in Scheibenlängsrichtung, kann der Krümmungsradius variieren, das heißt er muss in der jeweiligen Richtung nicht konstant sein.In a specific embodiment of the vehicle window according to the invention, the window body along a disc longitudinal direction and along a disk transverse direction in each case a curvature. This results in a three-dimensional curvature of the disk body. The curvature can each have a radius of curvature between 1,000 mm and 10,000 mm, preferably between 2,000 mm and 5,000 mm. About the curvature, that is in the disk transverse direction and / or in the disk longitudinal direction, the radius of curvature can vary, that is, it must not be constant in the respective direction.

Die Flüssigkristallanordnung der Fahrzeugscheibe nach der Erfindung kann mit kurzen Schaltzeiten, die bei etwa einer Sekunde liegen, über einen weiten Temperaturbereich betrieben werden. Zudem kann eine geringe Spannung zur Betätigung der Flüssigkristallanordnung, das heißt zum Schalten zwischen einer Sperrstellung und einer Durchlassstellung, ausreichen. Die insbesondere als Wechselspannung ausgebildete Spannung kann unter 30 V liegen. Die Frequenz der Wechselspannung beträgt beispielsweise 60 Hz, kann aber je nach gewünschter Geschwindigkeit der Ausrichtung der Flüssigkristalle auch höher sein und bis zu 100 bis 120 Hz betragen oder auch niedriger sein.The liquid crystal device of the vehicle window according to the invention can be operated over a wide temperature range with short switching times of about one second. In addition, a low voltage for actuating the liquid crystal device, that is, for switching between a blocking position and a passage position, sufficient. The voltage, which is in particular designed as an alternating voltage, may be less than 30 V. The frequency of the AC voltage is for example 60 Hz, but depending on the desired speed of the alignment of the liquid crystals may also be higher and be up to 100 to 120 Hz or even lower.

Des Weiteren bietet die Flüssigkristallanordnung der Fahrzeugscheibe nach der Erfindung im ungeschalteten Zustand eine sehr geringe Transmission, die für sichtbares Licht unter 1 % liegt. Die Farbe der Flüssigkristallanordnung ist beispielsweise grau, kann aber durch Beimischung von Farbstoffen kundenspezifisch angepasst werden.Furthermore, the liquid crystal arrangement of the vehicle window according to the invention in the unswitched state provides a very low transmission, which is less than 1% for visible light. For example, the color of the liquid crystal array is gray, but can be customized by incorporation of dyes.

Die Fahrzeugscheibe nach der Erfindung ist insbesondere ein Dachelement des betreffenden Fahrzeugs. Dieses Dachelement kann als Festdachelement, das starr mit dem Fahrzeugaufbau verbunden ist, oder auch als bewegliches Dachelement ausgebildet sein, das ein Deckelelement einer Schiebedachanordnung darstellt.The vehicle window according to the invention is in particular a roof element of the relevant vehicle. This roof element may be formed as a fixed roof element, which is rigidly connected to the vehicle body, or as a movable roof element, which constitutes a cover element of a sliding roof arrangement.

Um das Abschattungsverhalten der Fahrzeugscheibe nach der Erfindung weiter zu verbessern, ist bei einer bevorzugten Ausführungsform der Fahrzeugscheibe eine Polarisatorschicht vorgesehen. Die Polarisatorschicht ist vorzugsweise zwischen dem Scheibenkörper und der Flüssigkristallanordnung angeordnet, kann aber auch an der dem Scheibenkörper abgewandten Seite der Flüssigkristallanordnung angeordnet sein. Die Polarisatorschicht hat vorzugsweise unabhängig von der Anordnung eine Polarisationsrichtung, die rechtwinkelig zu einer Polarisationsrichtung der Flüssigkristallzelle in deren ungeschalteten Zustand ausgerichtet sein kann. Der geschaltete Zustand ist dann dem Transmissionszustand zugeordnet. Denkbar ist es aber auch, dass im ungeschalteten Zustand der Flüssigkristallezelle die Polarisationsrichtung der Polarisatorschicht parallel zur Polarisationsrichtung der Flüssigkristallzelle ist, so dass dann der Transmissionszustand der Anordnung vorliegt.In order to further improve the shading behavior of the vehicle window according to the invention, a polarizer layer is provided in a preferred embodiment of the vehicle window. The polarizer layer is preferably arranged between the disk body and the liquid-crystal arrangement, but may also be arranged on the side of the liquid-crystal arrangement facing away from the disk body. The polarizer layer preferably has, independently of the arrangement, a polarization direction which may be oriented perpendicular to a polarization direction of the liquid crystal cell in its unswitched state. The switched state is then assigned to the transmission state. However, it is also conceivable that in the unswitched state of the liquid crystal cell, the polarization direction of the polarizer layer is parallel to the polarization direction of the liquid crystal cell, so that then the transmission state of the device is present.

Um durch unterschiedliches thermisches Ausdehnungsverhalten begründete Spannungen zwischen der Polarisatorschicht und der hieran angrenzenden Funktionsschicht, beispielsweise dem Scheibenkörper oder der Flüssigkristallanordnung, aufnehmen zu können, ist die Polarisatorschicht vorzugsweise über eine Längenausdehnungskompensationsschicht an diese Funktionsschicht angebunden.In order to be able to absorb stresses caused by different thermal expansion behavior between the polarizer layer and the adjacent functional layer, for example the disk body or the liquid crystal arrangement, the polarizer layer is preferably connected to this functional layer via a length expansion compensation layer.

Die Längenausdehnungskompensationsschicht, die vorzugsweise optisch isotrop ausgebildet ist, kann eine Acrylatschicht, eine Schicht aus thermoplastischem Polyurethan, eine Epoxidschicht, eine Silikonschicht oder auch eine Schicht aus einem vernetzenden Material, wie Ethylenvinylacetat (EVA) oder Polyvinylbutural (PVB) sein. Um hinreichend Spannungen aufnehmen zu können, hat die Längenausdehnungskompensationsschicht vorzugsweise eine Dicke von mindestens 0,2 mm, vorzugsweise von mindestens 0,4 mm.The length expansion compensation layer, which is preferably optically isotropic, may be an acrylate layer, a thermoplastic polyurethane layer, an epoxy layer, a silicone layer, or even a layer of a crosslinking material such as ethylene vinyl acetate (EVA) or polyvinyl butane (PVB). In order to absorb sufficient stress, the length expansion compensation layer preferably has a thickness of at least 0.2 mm, preferably of at least 0.4 mm.

Um die Fahrzeugscheibe nach der Erfindung in einfacher Weise an den Fahrzeugaufbau, beispielsweise an eine Kinematik eines Schiebedachantriebs oder an einen Dachrahmen anbinden zu können, weist die Fahrzeugscheibe nach der Erfindung zweckmäßigerweise eine umlaufende Randumschäumung auf. In dieser können Einlegeteile, wie Befestigungslaschen oder ein Deckelinnenblech, eingebettet sein.In order to connect the vehicle window according to the invention in a simple manner to the vehicle body, for example to a kinematics of a sliding roof drive or to a roof frame, the vehicle window according to the invention expediently has a peripheral Randumschäumung. In this insert parts, such as fastening straps or an inner cover plate, be embedded.

Um Fahrzeuginsassen in einer Unfallsituation vor etwaigen Glassplittern zu schützen, kann die Fahrzeugscheibe nach der Erfindung eine Splitterschutzfolie aufweisen, die an der dem Scheibenkörper abgewandten Seite der Fahrzeugscheibe angeordnet ist.In order to protect vehicle occupants from accidental glass splinters in an accident situation, the vehicle window according to the invention may have a splinter protection film which is arranged on the side of the vehicle window facing away from the window body.

Um die Rückhaltefunktion der vorzugsweise kratz- und/oder reißfest ausgebildeten Splitterschutzfolie zu gewährleisten, ist diese vorzugsweise zumindest abschnittsweise von der umlaufenden Randumschäumung übergriffen bzw. in diese eingeschäumt. Die Splitterschutzfolie kann in einem zentralen Bereich der Scheibe angeklebt sein. In einem Randbereich kann die Splitterschutzfolie Perforationen für den Durchtritt der Randumschäumung aufweisen.In order to ensure the retention function of the preferably scratch-resistant and / or tear-resistant splinter protection film, it is preferably at least partially overlapped by the circumferential edge foam or foamed into it. The shatter-proofing film can be glued in a central region of the pane. In an edge region, the splinter protection film can have perforations for the passage of the edge foam.

Die Splitterschutzfolie ist beispielsweise aus einer mit Polysiloxan beschichteten Ethylenterephtalat-Folie (PET-Folie) gebildet.The splinter protection film is formed, for example, from a polysiloxane-coated ethylene terephthalate film (PET film).

Die Anbindung der Splitterschutzfolie an die Flüssigkristallanordnung oder an die Polarisatorschicht kann über eine Klebefolie erfolgen, die aus einem Polyvinylbutyral-Film (PVB-Film) oder einer transparenten Polyurethan-Folie besteht.The connection of the splinter protection film to the liquid crystal arrangement or to the polarizer layer can be effected by means of an adhesive film consisting of a polyvinyl butyral (PVB) film or a transparent polyurethane film.

Bei einer speziellen Ausführungsform kann an der Innenseite der Fahrzeugscheibe ein Scheibeninnenkörper angeordnet sein, der aus Glas, insbesondere einem Dünnglas, oder aus einem Kunststoff, insbesondere aus Polycarbonat, gebildet ist.In a special embodiment, a disk inner body may be arranged on the inside of the vehicle window, which is formed from glass, in particular a thin glass, or from a plastic, in particular from polycarbonate.

Der Einsatz von Kunststoff als Scheibenkörper und/oder als Scheibeninnenkörper vereinfacht sich dadurch, dass für die Flüssigkristallanordnung Dünnglasschichten als Substrat eingesetzt werden, die jeweils eine perfekte Barriereschicht bilden. Die an sich gegebenenfalls nicht hinreichenden Barriereeigenschaften des jeweiligen Kunststoffs können damit zumindest zum Teil vernachlässigt werden.The use of plastic as a disk body and / or as a disk inner body is simplified by the fact that thin glass layers are used as the substrate for the liquid crystal array, each forming a perfect barrier layer. The inherently insufficient barrier properties of the respective plastic can thus be at least partially neglected.

Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes der Erfindung sind der Beschreibung, der Zeichnung und den Patentansprüchen entnehmbar.Further advantages and advantageous embodiments of the subject matter of the invention are the description, the drawings and the claims removed.

Ausführungsbeispiele einer Fahrzeugscheibe nach der Erfindung sind in der Zeichnung schematisch vereinfacht dargestellt und werden in der nachfolgenden Beschreibung näher erläutert. Es zeigt:

  • 1 eine Draufsicht auf ein Fahrzeugdach mit einer Fahrzeugscheibe nach der Erfindung;
  • 2 einen Schnitt durch die Fahrzeugscheibe, der den Schichtaufbau derselben zeigt;
  • 3 einen Schnitt durch eine zweite Ausführungsform einer Fahrzeugscheibe nach der Erfindung;
  • 4 einen Schnitt durch eine dritte Ausführungsform einer Fahrzeugscheibe nach der Erfindung;
  • 5 einen Schnitt durch eine vierte Ausführungsform einer Fahrzeugscheibe nach der Erfindung; und
  • 6 einen Schnitt durch eine fünfte Ausführungsform einer Fahrzeugscheibe nach der Erfindung.
Embodiments of a vehicle window according to the invention are shown schematically simplified in the drawing and are explained in more detail in the following description. It shows:
  • 1 a plan view of a vehicle roof with a vehicle window according to the invention;
  • 2 a section through the vehicle window, showing the layer structure thereof;
  • 3 a section through a second embodiment of a vehicle window according to the invention;
  • 4 a section through a third embodiment of a vehicle window according to the invention;
  • 5 a section through a fourth embodiment of a vehicle window according to the invention; and
  • 6 a section through a fifth embodiment of a vehicle window according to the invention.

In 1 ist ein Fahrzeugdach 10 eines ansonsten nicht näher dargestellten Kraftfahrzeugs gezeigt. Das Fahrzeugdach 10 ist ein Panoramadach, das mit einem verstellbaren Deckelelement 12 eines Schiebedachs und einem Festdachelement 14 versehen ist, das starr an den Aufbau des Kraftfahrzeuges angebunden ist. Das Deckelelement 12 und das Festfachelement 14 sind jeweils als Glaselement und mithin als Fahrzeugscheibe ausgebildet. Zudem haben das Deckelelement 12 und das Festdachelement 14 jeweils den gleichen Schichtaufbau, der mit einer Beschattungsanordnung versehen ist und der anhand 2 dargestellt ist.In 1 is a vehicle roof 10 shown a motor vehicle not otherwise shown. The vehicle roof 10 is a panoramic roof that has an adjustable cover element 12 a sunroof and a fixed roof element 14 is provided, which is rigidly connected to the structure of the motor vehicle. The cover element 12 and the solid compartment element 14 are each formed as a glass element and thus as a vehicle window. In addition, the cover element 12 and the fixed roof element 14 each of the same layer structure, which is provided with a shading arrangement and based on 2 is shown.

Die jeweils als Fahrzeugscheibe ausgebildeten Dachelemente 12 und 14 umfassen jeweils einen Scheibenkörper 16, der aus einer entlang einer Scheibenlängsrichtung und entlang einer Scheibenquerrichtung jeweils gewölbten Glasplatte gebildet ist und die Außenhaut der jeweiligen Fahrzeugscheibe bildet. An der Innenseite des Scheibenkörpers 16 ist über eine Längenausdehnungskompensationsschicht 18 mit adhäsiven Eigenschaften eine Polarisatorschicht 20 angebunden, die einen linear Polarisator umfasst. Die Längenausdehnungskompensationsschicht 18 kann aus thermoplastischen Polyurethan, Polyvinylbutyral, Ethylenvinylacetat-Copolymer oder dergleichen gebildet sein.Each designed as a vehicle window roof elements 12 and 14 each comprise a disk body 16 which is formed from a along a disc longitudinal direction and along a disc transverse direction in each case curved glass plate and forms the outer skin of the respective vehicle window. On the inside of the disk body 16 is over a length expansion compensation layer 18 with adhesive properties a polarizer layer 20 connected, which includes a linear polarizer. The length expansion compensation layer 18 may be formed of thermoplastic polyurethane, polyvinyl butyral, ethylene vinyl acetate copolymer or the like.

Die Polarisatorschicht 20 ist wiederum auf eine Flüssigkristallanordnung 22 aufgebracht, die eine flächige Beschattungsanordnung der Fahrzeugscheibe bildet. An der Innenseite, d. h. an der dem Scheibenkörper 16 abgewandten Seite ist die Flüssigkristallanordnung 22 des Weiteren mit einer Splitterschutzfolie 24 versehen. Die Splitterschutzfolie 24 besteht aus einer mit Polysiloxan beschichteten PolyethylenterephthalatFolie.The polarizer layer 20 is in turn on a liquid crystal device 22 applied, which forms a flat shading arrangement of the vehicle window. On the inside, ie on the disk body 16 opposite side is the liquid crystal device 22 furthermore with a shatter protection foil 24 Mistake. The splinter protection film 24 consists of a polysiloxane-coated polyethylene terephthalate film.

Die Polarisatorschicht 20 hat eine Polarisationsrichtung, die rechtwinklig zu der Polarisationsrichtung der Flüssigkristallzelle 32 in deren Sperrstellung ausgerichtet ist.The polarizer layer 20 has a polarization direction perpendicular to the polarization direction of the liquid crystal cell 32 is aligned in the locked position.

Die das Deckelelement 12 und das Festdachelement 14 bildenden Fahrzeugscheiben weisen zu dem jeweils eine umlaufende Randumschäumung 26 auf, die die Splitterschutzfolie 24 an der Innenseite der jeweiligen Fahrzeugscheibe übergreift und die aus einem Polyurethan-Schaum gebildet ist.The the cover element 12 and the fixed roof element 14 forming vehicle windows have to each a peripheral edge foam 26 on top of that the shatter protection foil 24 engages over the inside of the respective vehicle window and which is formed from a polyurethane foam.

Die Flüssigkristallanordnung 22 umfasst zwei Schichten 28 und 30 aus Dünnglas mit einer Dicke von etwa 0,5 mm. Das jeweilige Dünnglas ist ein chemisch vorgespanntes Glas und biegsam ausgebildet. Zwischen den beiden Schichten 28 und 30 ist eine einzige Flüssigkristallzelle 32 angeordnet. An den Innenseiten der beiden Schichten 28 und 30 ist jeweils eine leitfähige Schicht zur elektrischen Anbindung der Flüssigkristallzelle an ein Bordnetz des Fahrzeugs angeordnet. Auf den leitfähigen Schichten ist jeweils zweckmäßigerweise eine Ausrichtungsschicht (alignment layer) angeordnet. Die Ausrichtungsschichten begrenzen jeweils die Flüssigkristallzelle 32 und dienen zur Vorausrichtung der Flüssigkristalle in der Flüssigkristallzelle im nicht geschaltenen Zustand. Zudem sind die beiden Ausrichtungsschichten durch nicht näher dargestellte Abstandshalter voneinander getrennt, so dass die Dicke der Flüssigkristallzelle 32, in der die Flüssigkristalle angeordnet sind, über die Erstreckung der Flüssigkristallanordnung zumindest weitgehend konstant ist.The liquid crystal device 22 includes two layers 28 and 30 made of thin glass with a thickness of about 0.5 mm. The respective thin glass is a chemically toughened glass and flexible. Between the two layers 28 and 30 is a single liquid crystal cell 32 arranged. On the insides of the two layers 28 and 30 in each case a conductive layer for electrical connection of the liquid crystal cell to an electrical system of the vehicle is arranged. A respective alignment layer is expediently arranged on the conductive layers. The alignment layers each delimit the liquid crystal cell 32 and serve to advance the liquid crystals in the liquid crystal cell in the non-switched state. In addition, the two alignment layers are separated by spacers, not shown, so that the thickness of the liquid crystal cell 32 , in which the liquid crystals are arranged, is at least substantially constant over the extent of the liquid crystal arrangement.

Die Polarisatorschicht 20 ist vor dem Anbinden an den Scheibenkörper 16 über einen einfachen Rollenprozess direkt auf die Flüssigkristallanordnung 22 bzw. die Dünnglassschicht 28 der Flüssigkristallanordnung 22 auflaminiert. Die Splitterschutzfolie wird direkt auf die Innenseite der Flüssigkristallanordnung 22 auflaminiert, und zwar vor dem Anbinden der dann aus der Polarisatorschicht 20, der Flüssigkristallanordnung 22 und der Splitterschutzfolie 24 bestehenden Einheit an den Scheibenkörper 16. Beim Anbinden dieser Einheit an den Scheibenkörper 16 wird diese entsprechend der dreidimensionalen Wölbung des Scheibenkörpers 16 gebogen und damit an die Wölbung des Scheibenkörpers 16 angepasst.The polarizer layer 20 is before tying to the disk body 16 via a simple roll process directly onto the liquid crystal device 22 or the thin glass layer 28 the liquid crystal device 22 laminated. The anti-shatter foil is applied directly to the inside of the liquid crystal device 22 laminated before bonding the then from the polarizer layer 20 , the liquid crystal device 22 and the anti-shatter foil 24 existing unit to the disk body 16 , When connecting this unit to the disk body 16 this becomes according to the three-dimensional curvature of the disk body 16 bent and thus to the curvature of the disk body 16 customized.

In 3 ist eine alternative Ausführungsform einer Fahrzeugscheibe 40 dargestellt, die sich von der in 2 dargestellten Fahrzeugscheibe dadurch unterscheidet, dass sie eine Polarisatorschicht 20 aufweist, die direkt auf die Innenseite des die Außenhaut bildenden Scheibenkörpers 16 auflaminiert ist. Die Polarisatorschicht 20 ist über eine Längenausdehnungskompensationsschicht 18, die aus einer Acrylatschicht, einer Schicht aus thermoplastischen Polyurethan, einer Epoxidschicht, einer Silikonschicht oder aus einer Schicht aus einem vernetzenden Material, wie Ethylenvinylacetat (EVA) oder Polyvinylbutyral (PVB) gebildet ist, mit einer gebogenen Flüssigkristallanordnung 22 verbunden, die der in 1 dargestellten Flüssigkristallanordnung entspricht. An der Innenseite der Flüssigkristallanordnung 22, die als Substrate jeweils eine gebogene Dünnglasschicht 28 und 30 aufweist, die eine Flüssigkristallzelle 32 begrenzt, ist ebenfalls eine Splitterschutzfolie 24 der in 2 dargestellten Art angeordnet. Zudem weist auch die Fahrzeugscheibe 40 nach 3 eine umlaufende Randumschäumung 26 aus einem Polyurethanschaum auf.In 3 is an alternative embodiment of a vehicle window 40 represented by the in 2 illustrated vehicle disc differs in that it is a polarizer layer 20 having, directly on the inside of the outer skin forming disc body 16 is laminated. The polarizer layer 20 is over a length expansion compensation layer 18 composed of an acrylate layer, a layer of thermoplastic polyurethane, an epoxy layer, a silicone layer, or a layer of a crosslinking material, such as ethylene vinyl acetate (EVA) or polyvinyl butyral (PVB), with a bent liquid crystal array 22 connected to the in 1 corresponds to the illustrated liquid crystal arrangement. On the inside of the liquid crystal device 22 , which each have a curved thin glass layer as substrates 28 and 30 comprising a liquid crystal cell 32 limited, is also a splinter protection film 24 the in 2 arranged type arranged. In addition, the vehicle window also points 40 to 3 a circumferential edge foam 26 from a polyurethane foam.

In 4 ist eine weitere Ausführungsform einer Fahrzeugscheibe 50 dargestellt, die ebenfalls weitgehend der Fahrzeugscheibe nach 2 entspricht, sich von dieser aber dadurch unterscheidet, dass eine Flüssigkristallanordnung 22, die ebenfalls entsprechend der Ausführungsform nach 2 zwei Schichten 28 und 30 aus gebogenem Dünnglas umfasst, die eine Flüssigkristallzelle 32 begrenzen, über eine Längenausdehnungskompensationsschicht 18 direkt an einen die Außenhaut bildenden Scheibenkörper 16 angebunden ist. An der Innenseite, d. h. an der dem Scheibenkörper 16 abgewandten Seite, ist auf die Flüssigkristallanordnung 22 eine Polarisatorschicht 20 auflaminiert, auf welche wiederum eine Splitterschutzfolie 24 auflaminiert ist. Die Splitterschutzfolie 24 ist entsprechend den oben beschriebenen Ausführungsformen an Ihren Rändern von einer umlaufenden Polyurethan-Randumschäumung der Fahrzeugscheibe 50 übergriffen.In 4 is another embodiment of a vehicle window 50 shown, which is also largely the vehicle window after 2 corresponds to, but different from, that a liquid crystal array 22 , which also according to the embodiment according to 2 two layers 28 and 30 made of bent thin glass, which comprises a liquid crystal cell 32 limit, over a length expansion compensation layer 18 directly to a shell body forming the outer skin 16 is connected. On the inside, ie on the disk body 16 opposite side, is on the liquid crystal assembly 22 a polarizer layer 20 laminated on which in turn a shatter protection film 24 is laminated. The splinter protection film 24 is according to the embodiments described above at your edges by a circumferential polyurethane edge foaming of the vehicle window 50 overlapped.

In 5 ist eine weitere Ausführungsform einer Fahrzeugscheibe 60 nach der Erfindung dargestellt. Die Fahrzeugscheibe 60 unterscheidet sich von der Fahrzeugscheibe nach 2 dadurch, dass sie an der Innenseite keine Splitterschutzfolie aufweist. Vielmehr ist über eine weitere Längenausdehnungskompensationsschicht 62 mit adhäsiven Eigenschaften eine weitere Schicht 64 aus gebogenem Dünnglas auf die Flüssigkristallanordnung 22 auflaminiert. Dieses Dünnglas bildet die innere Sichtfläche der Fahrzeugscheibe 60.In 5 is another embodiment of a vehicle window 60 represented according to the invention. The vehicle window 60 differs from the vehicle window 2 in that it has no splinter protection film on the inside. Rather, there is another length expansion compensation layer 62 with adhesive properties another layer 64 of curved thin glass on the liquid crystal device 22 laminated. This thin glass forms the inner visible surface of the vehicle window 60 ,

In 6 ist eine weitere Ausführungsform einer Fahrzeugscheibe 70 nach der Erfindung dargestellt. Die Fahrzeugscheibe 70 unterscheidet sich von der Fahrzeugscheibe nach 5 dadurch, dass sie einen Scheibenkörper 16' aus einem Kunststoffwerkstoff, wie einem Polycarbonat, umfasst. Zudem weist sie an der Innenseite ebenfalls anstelle einer Glasschicht eine Schicht 64' aus einem Kunststoffwerkstoff, wie Polycarbonat, auf. Im Übrigen entspricht die Fahrzeugscheibe 70 der Fahrzeugscheibe nach 5.In 6 is another embodiment of a vehicle window 70 represented according to the invention. The vehicle window 70 differs from the vehicle window 5 in that they have a disk body 16 ' made of a plastic material, such as a polycarbonate. In addition, it also has a layer on the inside instead of a glass layer 64 ' made of a plastic material, such as polycarbonate, on. Incidentally, the vehicle window corresponds 70 the vehicle window after 5 ,

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Fahrzeugdachvehicle roof
1212
Deckelelementcover element
1414
FestdachelementFixed roof element
16, 16'16, 16 '
Scheibenkörperwasher body
1818
LängenausdehnungskompensationsschichtLinear expansion compensation layer
2020
Polarisatorschichtpolarizer
2222
Flüssigkristallanordnungliquid crystal device
2424
SplitterschutzfolieShatter film
2626
Randumschäumungperipheral foam
2828
Schichtlayer
3030
Schichtlayer
3232
Flüssigkristallzelleliquid crystal cell
4040
Fahrzeugscheibevehicle window
5050
Fahrzeugscheibevehicle window
6060
Fahrzeugscheibevehicle window
6262
LängenausdehnungskompensationsschichtLinear expansion compensation layer
64, 64'64, 64 '
Schichtlayer
7070
Fahrzeugscheibevehicle window

Claims (11)

Fahrzeugscheibe, umfassend einen plattenartigen Scheibenkörper (16), der eine einer Fahrzeugumgebung zugewandte Außenseite und eine der Außenseite abgewandte Innenseite hat und an dessen Innenseite eine Beschattungsanordnung angeordnet ist, die aus einer Flüssigkristallanordnung (22) gebildet ist, die eine Flüssigkristallzelle (32) umfasst, dadurch gekennzeichnet, dass die Flüssigkristallanordnung (22) zwei Schichten (28, 30) aus biegsamem Dünnglas umfasst, zwischen denen die Flüssigkristallzelle (32) angeordnet ist.A vehicle window comprising a plate-like disk body (16) having a vehicle exterior facing outside and one of Outside facing away from the inside and on the inside of a shading arrangement is arranged, which is formed from a liquid crystal array (22) comprising a liquid crystal cell (32), characterized in that the liquid crystal array (22) comprises two layers (28, 30) of flexible thin glass between which the liquid crystal cell (32) is arranged. Fahrzeugscheibe nach Anspruch 1, dadurch gekennzeichnet, dass die Schichten (28, 30) aus biegsamen Dünnglas jeweils eine Dicke von 0,1 mm bis 1,5 mm haben.Vehicle window after Claim 1 Characterized in that the layers (28, 30) of flexible thin glass each have a thickness of 0.1 mm to 1.5 mm. Fahrzeugscheibe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Scheibenkörper (16) in Scheibenlängsrichtung und/oder in Scheibenquerrichtung gewölbt ist.Vehicle window after Claim 1 or 2 , characterized in that the disk body (16) is curved in the disk longitudinal direction and / or in the disk transverse direction. Fahrzeugscheibe nach einem der Ansprüche 1 bis 3, gekennzeichnet durch eine Polarisatorschicht (20).Vehicle window after one of the Claims 1 to 3 characterized by a polarizer layer (20). Fahrzeugscheibe nach Anspruch 4, dadurch gekennzeichnet, dass die Polarisatorschicht (20) zwischen dem Scheibenkörper (16) und der Flüssigkristallanordnung (22) angeordnet ist.Vehicle window after Claim 4 , characterized in that the polarizer layer (20) is disposed between the disk body (16) and the liquid crystal device (22). Fahrzeugscheibe nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Polarisatorschicht (20) über eine Längensausdehnungskompensationsschicht (18) an den Scheibenkörper (16) und/oder an die Flüssigkristallanordnung (22) angebunden ist.Vehicle window after Claim 4 or 5 , characterized in that the polarizer layer (20) via a Längensausdehnungskompensationsschicht (18) to the disk body (16) and / or to the liquid crystal assembly (22) is connected. Fahrzeugscheibe nach Anspruch 6, dadurch gekennzeichnet, dass die Längenausdehnungskompensationsschicht (18) eine Acrylatschicht, eine Schicht aus thermoplastischen Polyurethan, eine Epoxidschicht, eine Silikonschicht oder eine Schicht aus einem vernetzenden Material, wie Ethylenvinylacetat (EVA) oder Polyvinylbutyral (PVB), ist.Vehicle window after Claim 6 , characterized in that the length expansion compensating layer (18) is an acrylate layer, a layer of thermoplastic polyurethane, an epoxy layer, a silicone layer or a layer of a crosslinking material such as ethylene vinyl acetate (EVA) or polyvinyl butyral (PVB). Fahrzeugscheibe nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Längenausdehnungskompensationsschicht (18) eine Dicke von mindestens 0,2 mm, vorzugsweise von mindestens 0,4 mm hat.Vehicle window after Claim 6 or 7 , characterized in that the length expansion compensation layer (18) has a thickness of at least 0.2 mm, preferably at least 0.4 mm. Fahrzeugscheibe nach einem der Ansprüche 1 bis 8, gekennzeichnet durch eine umlaufende Randumschäumung (26).Vehicle window after one of the Claims 1 to 8th , characterized by a peripheral edge foam (26). Fahrzeugscheibe nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass an der dem Scheibenkörper (16) abgewandten Seite der Fahrzeugscheibe eine Splitterschutzfolie (24) angeordnet ist.Vehicle window after one of the Claims 1 to 9 , characterized in that on the disc body (16) facing away from the vehicle window a splinter protection film (24) is arranged. Fahrzeugscheibe nach Anspruch 10 in Kombination mit Anspruch 9, dadurch gekennzeichnet, dass die Randumschäumung (26) die Splitterschutzfolie (24) zumindest abschnittsweise übergreift.Vehicle window after Claim 10 in combination with Claim 9 , characterized in that the Randumschäumung (26) overlaps the splinter protection film (24) at least in sections.
DE102017113985.0A 2017-06-23 2017-06-23 Vehicle window with disk body and liquid crystal arrangement arranged on the inside Withdrawn DE102017113985A1 (en)

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