DE4217416A1 - Microencapsulated liquid crystal optical switch e.g. for window of building - using UV radiation interference reflection or absorption layer on UV incident surface to reduce UV radiation on liquid crystal droplet layer - Google Patents

Microencapsulated liquid crystal optical switch e.g. for window of building - using UV radiation interference reflection or absorption layer on UV incident surface to reduce UV radiation on liquid crystal droplet layer

Info

Publication number
DE4217416A1
DE4217416A1 DE19924217416 DE4217416A DE4217416A1 DE 4217416 A1 DE4217416 A1 DE 4217416A1 DE 19924217416 DE19924217416 DE 19924217416 DE 4217416 A DE4217416 A DE 4217416A DE 4217416 A1 DE4217416 A1 DE 4217416A1
Authority
DE
Germany
Prior art keywords
layer
liquid crystal
radiation
ultraviolet radiation
electrically conductive
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
DE19924217416
Other languages
German (de)
Inventor
Helen Rose Dr Wilson
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.)
Interpane Entwicklungs und Beratungs GmbH and Co KG
Original Assignee
Interpane Entwicklungs und Beratungs GmbH and Co KG
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
Priority claimed from DE19924215868 external-priority patent/DE4215868A1/en
Application filed by Interpane Entwicklungs und Beratungs GmbH and Co KG filed Critical Interpane Entwicklungs und Beratungs GmbH and Co KG
Priority to DE19924217416 priority Critical patent/DE4217416A1/en
Publication of DE4217416A1 publication Critical patent/DE4217416A1/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Liquid Crystal (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)

Abstract

A liquid crystal layer (1) is located between two transparent electrically conductive layers (12, 13) between two substrates (10, 11). Incoming radiation is incident on the liquid crystal layer (1). In addition, A UV radiation reflecting or absorbing layer (15) is formed on at least one of the substrates (10, 11) or at least one of the conductive layers (12, 13). Thus, the extra UV reflecting or absorbing layer (15) can be arranged between the surface onto which the light is incident and the boundary surface which the liquid crystal layer (1) forms with the layer adjacent to it in the direction of incident radiation (16). USE/ADVANTAGE - Buildings glazing. Reduces intensity of UV radiation in liquid crystal layer, increasing life of device.

Description

Die Erfindung betrifft insbesondere eine Weiterbildung mikro­ gekapselter Flüssigkristall-Systeme mit elektrisch schalt­ barer optischer Transmission, die mit dem Verfahren entspre­ chend dem Hauptpatent hergestellt sind.The invention relates in particular to a further development micro encapsulated liquid crystal systems with electrical switching barer optical transmission, which corresponds to the method according to the main patent.

Mikrogekapselte Flüssigkristall-Systeme mit elektrisch schalt­ barer, optischer Transmission, die mit dem Verfahren nach dem Hauptpatent hergestellt sind, weisen folgenden Nachteil auf: Die mikrogekapselte Flüssigkristallschicht 1 (insbesondere die darin enthaltenen Flüssigkristalltröpfchen 2) ist bei der er­ findungsgemäßen Verwendung, z. B. bei einer Gebäudeverglasung, der durch das Substrat 11 und die transparente elektrisch leit­ fähige Schicht 13 einfallenden ultravioletten Strahlung ausge­ setzt. Zwar bewirkt das Substrat 11 bereits eine wesentliche Reduzierung der durch dieses hindurchtretenden ultravioletten Strahlung, jedoch kann die verbleibende Intensität der ultra­ violetten Strahlung, der die mikrogekapselte Flüssigkristall­ schicht 1 ausgesetzt ist, eine wesentliche Reduzierung der Lebensdauer der Flüssigkristall-Systeme bewirken.Microencapsulated liquid crystal systems with electrically switchable, optical transmission, which are produced with the method according to the main patent, have the following disadvantage: The microencapsulated liquid crystal layer 1 (in particular the liquid crystal droplets 2 contained therein) is in the inventive use, z. B. in a building glazing, the out through the substrate 11 and the transparent electrically conductive layer 13 incident ultraviolet radiation. Although the substrate 11 already brings about a substantial reduction in the ultraviolet radiation passing through it, the remaining intensity of the ultra violet radiation to which the microencapsulated liquid crystal layer 1 is exposed can bring about a substantial reduction in the life of the liquid crystal systems.

Die Erfindung bezweckt daher, eine verbesserte Anordnung eines mikrogekapselten Flüssigkristall-Systems anzugeben, bei der die Intensität der ultravioletten Strahlung in der mikrogekapselten Flüssigkristallschicht wesentlich reduziert ist. Dabei soll das mikrogekapselten Flüssigkristall-Systeme im wesentlichen weiterhin durch das in der obigen Patentanmeldung offenbarte Verfahren herstellbar sein.The invention therefore aims to provide an improved arrangement of a micro-encapsulated liquid crystal system to specify in which the Intensity of ultraviolet radiation in the microencapsulated Liquid crystal layer is significantly reduced. It should microencapsulated liquid crystal systems essentially further by that disclosed in the above patent application Process can be produced.

Dementsprechend ist es die Aufgabe der vorliegenden Erfindung, eine Variation des im Hauptpatent offenbarten Verfahrens anzugeben, durch welche eine Reduzierung der ultravioletten Strahlung in der mikrogekapselten Flüssigkristallschicht des Flüssigkristall-Systems erreicht wird. Accordingly, it is the object of the present invention a variation of the process disclosed in the main patent specify by which a reduction in ultraviolet Radiation in the microencapsulated liquid crystal layer of the Liquid crystal system is achieved.  

Die Aufgabe wird bei dem Verfahren nach Hauptpatent durch die Merkmale des Anspruchs 1 gelöst.The task is in the process according to the main patent by the Features of claim 1 solved.

Die Aufgabe wird ferner bei der Anordnung nach Hauptpatent durch die Merkmale des Anspruchs 2 gelöst.The task is also in the arrangement according to the main patent solved by the features of claim 2.

Insbesondere wird eine Verlängerung der Lebensdauer von Anord­ nungen gemäß Anspruch 24 des Hauptpatentes für Gebäudevergla­ sungen usw. erreicht.In particular, extending the life of anord Openings according to claim 24 of the main patent for building glazing solutions etc. reached.

Die Erfindung wird im folgenden an dem in der Zeichnung darge­ stellten Ausführungsbeispiels näher erläutert. Dabei zeigt die einzige Fig. 1 einen Schnitt durch ein Ausführungsbeispiel eines mikrogekapselter Flüssigkristall-Systems.The invention is explained in more detail below on the embodiment presented in the drawing Darge. The sole Fig. 1 shows a section through an embodiment of a microencapsulated liquid crystal system.

Die Anordnung entsprechend dem Bezugszeichen 1 bis 14 ist in der Figurenbeschreibung zu Fig. 1 der Beschreibung des Hauptpatents ausführlich beschrieben. Ergänzend weist die Anordnung eine ultraviolette Strahlung reflektierende oder absorbierende Schicht 15 auf. Die ultraviolette Strahlung reflektierende oder absorbierende Schicht 15 kann dabei, wie dargestellt, an der Außenseite des der einfallenden Strahlung 16 zugewandten Substrates 11 angeordnet sein. Es ist jedoch auch möglich, die ultraviolette Strahlung reflektierende oder absorbierende Schicht 15 zwischen dem der einfallenden Strah­ lung zugewandten Substrat 11 und der transparenten elektrisch leitfähigen Schicht 13 oder der mikrogekapselter Flüssigkri­ stallschicht 1 und der elektrisch leitfähigen Schicht 13 anzu­ ordnen. Desweiteren ist es möglich, die elektrisch leitfähige Schicht 13 in ihrer Dicke so zu bemessen, daß sie ultraviolette Strahlung reflektiert bzw. eine verringerte Transmission für ultraviolette Strahlung aufweist.The arrangement corresponding to reference numerals 1 to 14 is described in detail in the description of the figures relating to FIG. 1 of the description of the main patent. In addition, the arrangement has an ultraviolet radiation reflecting or absorbing layer 15 . The layer 15 reflecting or absorbing ultraviolet radiation can, as shown, be arranged on the outside of the substrate 11 facing the incident radiation 16 . However, it is also possible to arrange the ultraviolet radiation reflecting or absorbing layer 15 between the incident radiation facing substrate 11 and the transparent electrically conductive layer 13 or the microencapsulated liquid crystal layer 1 and the electrically conductive layer 13 . Furthermore, it is possible to dimension the electrically conductive layer 13 in such a way that it reflects ultraviolet radiation or has a reduced transmission for ultraviolet radiation.

Die Schicht 15 wird vorzugsweise als reflektierende Inter­ ferenzschicht ausgeführt. Es ist jedoch auch möglich, die Schicht 15 als ultraviolette Strahlung absorbierende Schicht auszuführen. Das Aufbringen der ultraviolette Strahlung reflektierenden oder absorbierenden Schicht 15 kann bei dem in der obigen Patentanmeldung offenbarten Herstellungsverfahren unmittelbar vor oder nach Aufbringen der elektrisch leitfähigen Schicht 13 erfolgen.The layer 15 is preferably designed as a reflective interferential layer. However, it is also possible to design the layer 15 as an ultraviolet radiation-absorbing layer. In the manufacturing method disclosed in the above patent application, the application of the ultraviolet radiation-reflecting or absorbing layer 15 can take place immediately before or after the application of the electrically conductive layer 13 .

Dabei kann ein Sputterverfahren oder ein pyrolitisches Verfahren verwendet werden, oder die ultraviolette Strahlung reflektierende oder absorbierende Schicht kann mittels eines Rotationsschleuderverfahrens aufgebracht werden.This can be a sputtering process or a pyrolytic Process used, or the ultraviolet radiation reflective or absorbent layer can be by means of a Rotary centrifugal process are applied.

Claims (6)

1. Verfahren zur Herstellung einer Anordnung mit elektrisch schaltbarer optischer Transmission nach einem der Ansprüche 1 bis 22 gemäß Hauptpatent (Patentanmeldung P 42 15 868.0), dadurch gekennzeichnet, daß dieses einen weiteren Verfahrensschritt zum Anbringen einer ultraviolette Strahlung reflektierenden oder absorbierenden Schicht (15) an zumindest einem der Substrate (10, 11) oder zumindest einer der elektrisch leitfähigen Schichten (12, 13) aufweist.1. A method for producing an arrangement with an electrically switchable optical transmission according to one of claims 1 to 22 according to the main patent (patent application P 42 15 868.0), characterized in that this is a further process step for attaching an ultraviolet radiation reflecting or absorbing layer ( 15 ) at least one of the substrates ( 10 , 11 ) or at least one of the electrically conductive layers ( 12 , 13 ). 2. Anordnung mit elektrisch schaltbarer, optischer Trans­ mission, die mittels des Verfahrens nach einem der Ansprüche 1 bis 22 gemäß Hauptpatent (Patentanmeldung P 42 15 868.0) herstellbar ist, dadurch gekennzeichnet, daß diese zusätzlich zumindest eine ultraviolette Strahlung reflektierende oder absorbierende Schicht (15) aufweist, die zwischen der der einfallenden Strahlung (16) zugewandten Oberfläche der Anordnung und der Grenzfläche, die die mikrogekapselte Flüssigkristallschicht 1 mit der in Richtung der einfallenden Strahlung (16) benachbarten Schicht bildet, angeordnet ist. 2. Arrangement with electrically switchable, optical trans mission, which can be produced by means of the method according to one of claims 1 to 22 according to the main patent (patent application P 42 15 868.0), characterized in that it additionally has at least one ultraviolet radiation reflecting or absorbing layer ( 15 ) which is arranged between the surface of the arrangement facing the incident radiation ( 16 ) and the interface which forms the microencapsulated liquid crystal layer 1 with the layer adjacent in the direction of the incident radiation ( 16 ). 3. Anordnung nach Anspruch 2, dadurch gekennzeichnet, daß es sich bei der ultravioletten Strahlung reflektierenden oder absorbierenden Schicht (15) um eine Interferenzschicht handelt, die eine geringe Transmission für ultraviolette Strahlung aufweist.3. Arrangement according to claim 2, characterized in that the ultraviolet radiation reflecting or absorbing layer ( 15 ) is an interference layer which has a low transmission for ultraviolet radiation. 4. Anordnung nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die ultraviolette Strahlung reflektierende Schicht (15) auf der der einfallenden Strahlung (16) zugewandten Seite des Substrates (11) angeordnet ist.4. Arrangement according to claim 2 or 3, characterized in that the ultraviolet radiation reflecting layer ( 15 ) is arranged on the side of the substrate ( 11 ) facing the incident radiation ( 16 ). 5. Anordnung nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die ultraviolette Strahlung reflektierende oder absorbierende Schicht (15) zwischen dem Substrat (11) und der transparenten elektrisch leitfähigen Schicht (13) oder zwischen der elektrisch leitfähigen Schicht (13) und der mikrogekapselten Flüssigkristallschicht (1) angeordnet ist.5. Arrangement according to claim 2 or 3, characterized in that the ultraviolet radiation reflecting or absorbing layer ( 15 ) between the substrate ( 11 ) and the transparent electrically conductive layer ( 13 ) or between the electrically conductive layer ( 13 ) and the microencapsulated Liquid crystal layer ( 1 ) is arranged. 6. Anordnung nach Anspruch 3, dadurch gekennzeichnet, daß die der einfallenden Strahlung (16) zugewandte elektrisch leitfähige Schicht (13) in ihrer Dicke derart bemessen ist, daß diese als eine Interferenzschicht wirkt, die eine geringe Transmission für ultraviolette Strahlung aufweist.6. Arrangement according to claim 3, characterized in that the incident radiation ( 16 ) facing electrically conductive layer ( 13 ) is dimensioned in its thickness such that it acts as an interference layer which has a low transmission for ultraviolet radiation.
DE19924217416 1992-05-14 1992-05-26 Microencapsulated liquid crystal optical switch e.g. for window of building - using UV radiation interference reflection or absorption layer on UV incident surface to reduce UV radiation on liquid crystal droplet layer Ceased DE4217416A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19924217416 DE4217416A1 (en) 1992-05-14 1992-05-26 Microencapsulated liquid crystal optical switch e.g. for window of building - using UV radiation interference reflection or absorption layer on UV incident surface to reduce UV radiation on liquid crystal droplet layer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924215868 DE4215868A1 (en) 1992-05-14 1992-05-14 Mfg. micro-encapsulated liq. crystal system - having electrically switchable optical transmission
DE19924217416 DE4217416A1 (en) 1992-05-14 1992-05-26 Microencapsulated liquid crystal optical switch e.g. for window of building - using UV radiation interference reflection or absorption layer on UV incident surface to reduce UV radiation on liquid crystal droplet layer

Publications (1)

Publication Number Publication Date
DE4217416A1 true DE4217416A1 (en) 1994-02-03

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0825478A1 (en) * 1996-08-22 1998-02-25 Saint-Gobain Vitrage Glazing with variable optical and/or energetic characteristics
US5729312A (en) * 1994-03-18 1998-03-17 Sharp Kabushiki Kaisha LCD and method for producing the same in which a larger number of substrate gap control materials is larger in the polymer walls than in the liquid crystal regions
US5734454A (en) * 1993-12-08 1998-03-31 Matsushita Electric Industrial Co., Ltd. Liquid crystal panel with reducing means, manufacturing method therefor and projection display apparatus using the same
US6246456B1 (en) 1993-12-27 2001-06-12 Matsushita Electric Industrial Co., Ltd. Liquid-crystal panel of polymer dispersed type, method of manufacturing the same, and liquid-crystal display apparatus
CN105489380A (en) * 2014-10-01 2016-04-13 韩国科学技术研究院 Photoreactive smart window
WO2018132491A1 (en) * 2017-01-10 2018-07-19 Ubiquitous Energy, Inc. Window-integrated transparent photovoltaic module

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324691A1 (en) * 1983-07-08 1985-01-17 Merck Patent Gmbh, 6100 Darmstadt Electro-optical display element
DE3417363A1 (en) * 1983-11-01 1985-05-09 Polytronics, Inc., Richardson, Tex. PACKING MATERIAL FOR LIQUID CRYSTAL CELLS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324691A1 (en) * 1983-07-08 1985-01-17 Merck Patent Gmbh, 6100 Darmstadt Electro-optical display element
DE3417363A1 (en) * 1983-11-01 1985-05-09 Polytronics, Inc., Richardson, Tex. PACKING MATERIAL FOR LIQUID CRYSTAL CELLS

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Pat. Abstr. Jap. P 139, 02.09.1982, Vol. 6, No. 168: JP 57-84 429 A *
Pat. Abstr. Jap. P 147, 07.10.1982, Vol. 6, No. 198: JP 57-1 08 828 A *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5734454A (en) * 1993-12-08 1998-03-31 Matsushita Electric Industrial Co., Ltd. Liquid crystal panel with reducing means, manufacturing method therefor and projection display apparatus using the same
US5963283A (en) * 1993-12-08 1999-10-05 Matsushita Electric Industrial Co., Ltd Liquid crystal panel with reducing means, manufacturing method therefor and projection display apparatus using the same
US6333770B1 (en) 1993-12-08 2001-12-25 Matsushita Electric Industrial Co., Ltd. Liquid crystal panel with reducing means, manufacturing method therefore and projection display apparatus using the same
US6246456B1 (en) 1993-12-27 2001-06-12 Matsushita Electric Industrial Co., Ltd. Liquid-crystal panel of polymer dispersed type, method of manufacturing the same, and liquid-crystal display apparatus
US5729312A (en) * 1994-03-18 1998-03-17 Sharp Kabushiki Kaisha LCD and method for producing the same in which a larger number of substrate gap control materials is larger in the polymer walls than in the liquid crystal regions
EP0825478A1 (en) * 1996-08-22 1998-02-25 Saint-Gobain Vitrage Glazing with variable optical and/or energetic characteristics
FR2752570A1 (en) * 1996-08-22 1998-02-27 Saint Gobain Vitrage GLAZING WITH VARIABLE OPTICAL AND / OR ENERGY PROPERTIES
US6055088A (en) * 1996-08-22 2000-04-25 Saint-Gobain Vitrage Glazing with variable optical and/or energetic properties
CN105489380A (en) * 2014-10-01 2016-04-13 韩国科学技术研究院 Photoreactive smart window
CN105489380B (en) * 2014-10-01 2018-05-29 韩国科学技术研究院 Photoreactivity smart window
WO2018132491A1 (en) * 2017-01-10 2018-07-19 Ubiquitous Energy, Inc. Window-integrated transparent photovoltaic module

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