EP1506449A2 - Element electro-optique transmissif et ensemble a vitres dote dudit element - Google Patents

Element electro-optique transmissif et ensemble a vitres dote dudit element

Info

Publication number
EP1506449A2
EP1506449A2 EP03730014A EP03730014A EP1506449A2 EP 1506449 A2 EP1506449 A2 EP 1506449A2 EP 03730014 A EP03730014 A EP 03730014A EP 03730014 A EP03730014 A EP 03730014A EP 1506449 A2 EP1506449 A2 EP 1506449A2
Authority
EP
European Patent Office
Prior art keywords
liquid crystal
optical element
element according
layer
glass
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Withdrawn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
EP03730014A
Other languages
German (de)
English (en)
Inventor
Werner Sobek
Walter Haase
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.)
Werner Sobek Ingenieure GmbH and Co KG
Original Assignee
Werner Sobek Ingenieure 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
Application filed by Werner Sobek Ingenieure GmbH and Co KG filed Critical Werner Sobek Ingenieure GmbH and Co KG
Publication of EP1506449A2 publication Critical patent/EP1506449A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • E06B2009/2464—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds featuring transparency control by applying voltage, e.g. LCD, electrochromic panels
    • 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
    • G02F1/133528—Polarisers
    • 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
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133565—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements inside the LC elements, i.e. between the cell substrates

Definitions

  • the present invention relates to a continuously electrically switchable transmissive electro-optical element according to the preamble of claim 1 and to a pane arrangement equipped with such an element for windows, doors, partition walls, facades and the like. According to the preamble of one of claims 15 to 19.
  • Continuously electrically switchable transmissive optical elements are known in the display area in the form of so-called TN (twisted nematic) cells or STN (super twisted nematic) cells.
  • the light polarizer layer is arranged on the outside of the respective carrier substrate or on its own carriers.
  • Cells with externally applied polarizers have the disadvantage that the polarizers in such cells or elements are not protected against mechanical and physical influences. If light polarizers with their own carrier substrates are used, this makes the entire switchable unit more expensive. Since the polarizers are sensitive to mechanical influences and also to UV radiation and also represent a significant cost factor, the disadvantages mentioned are unacceptable.
  • Electrochromic glasses the shading of which is due to the discoloration of dyes due to an electric current, are currently used in the case of pane arrangements, the light transmittance of which should be variable. Such electrochromic glasses, however, discolor when Darken and therefore lead to a color-distorted view. They also need one
  • the object of the present invention is to provide a continuously electrically switchable transmissive electro-optical element in which the light polarizers are protected against external influences and which can be manufactured more cost-effectively. Furthermore, a pane arrangement for windows, doors, partitions, facades and the like is to be created, which can be produced inexpensively using a continuously electrically switchable transmissive electro-optical element.
  • a continuously electrically switchable transmissive electro-optical element in which the reduction of the system components goes hand in hand with a reduction in costs due to a more compact design.
  • the light polarizers applied as a coating are against due to the internal arrangement mechanical and physical influences protected, the almost complete absorption of the UV light caused by the carrier substrates taking into account the UV sensitivity of the polarizers.
  • the light polarizer layers placed inside can be applied in a more cost-effective process and more easily integrated into a switchable element. This significantly reduces the total cost of a switchable cell. Due to the ability of the light-polarizing coating to act as an orientation layer for the liquid crystal, the application of an additional orientation layer may not be necessary.
  • polarizing glasses as carrier substrates can also simplify the cell structure, which leads to a cost reduction.
  • These polarizing glasses are completely UV-insensitive. Their function is based on the absorption in the impurity-doped glass, which differs depending on the spectral and vibration direction.
  • liquid crystal polarization provided inside or outside the cell or the use of glass polarizers provides enormous cost advantages. If the liquid crystal polarizer layer is additionally used as an orientation layer for the “twisted nematic” liquid crystal or the “super twisted nematic” liquid crystal enclosed in the cell, an otherwise necessary orientation layer within the electro-optical element may also be omitted. This also significantly reduces manufacturing costs.
  • the measures according to the invention using the technology from the display area, ensure that the pane arrangement can be shaded or darkened in a stepless manner and that its individual shading phases can be changed or specifically adjusted in a very short time.
  • the light polarizer layers can be arranged in a protected manner either within the continuously electrically switchable transmissive electro-optical element or can be provided on the inside of a glass pane of the pane arrangement in accordance with building physics requirements or can also be used in the form of polarizing glass panes as carrier substrates or as end glazing.
  • FIG. 1 shows a perspective broken view of the structure of a continuously electrically switchable transmissive electro-optical element according to a first exemplary embodiment of the present invention, for example in the form of a twisted nematic cell with internal light polarizer layers and additional orientation layers,
  • FIG. 2 shows a representation of the electro-optical element corresponding to FIG. 1, but according to a second exemplary embodiment of the present invention, for example in the form of a twisted nematic cell with internal light polarizer layers but without additional orientation layers,
  • FIG. 3 shows a representation of the electro-optical element corresponding to FIG. 1, but according to a third exemplary embodiment of the present invention, for example in the form of a twisted nematic cell without an internal polarizer but with an orientation layer,
  • Figure 4 shows a disk arrangement in the form of a
  • Insulating glazing for windows for example, with a transmissive electro-optical element according to the first or second embodiment of FIGS. 1 and 2,
  • FIG. 5 shows a representation of a pane arrangement corresponding to FIG. 4, but using a transmissive electro-optical element according to the third exemplary embodiment of the present invention from FIG. 3, and 6 shows a representation of a pane arrangement corresponding to FIG. 4, but using a transmissive electro-optical element according to a fourth exemplary embodiment of the present invention, the outer pane of the pane arrangement being at the same time a carrier substrate of the electro-optical element.
  • a light polarizer layer 25 or 35 is provided between the insulator 28 or 32 and the orientation layer 29 or 31. These light polarizer layers 25 and 35 serve to polarize the incident light before entering the liquid crystal layer 30, in which the light vector around
  • the two light polarizers are rotated relative to one another in accordance with the cell type in their polarization directions by a certain angle.
  • the two transparent electrodes 27 and 33 are driven by an electrical voltage, as a result of which the liquid crystal of the liquid crystal layer 30 is in an electrical field which changes in its properties. If an electric field of a certain strength is applied between the two transparent electrodes 27 and 33, the liquid crystal loses the ability to rotate the light vector so that the light cannot pass through the polarizer 25 or 35 on the output side. In this way, the transmissive electro-optical element 10 can be switched continuously or continuously and thus shaded.
  • the arrangement can also be reversed, ie that the transmissive electro-optical element 10 only becomes transparent when an electrical field is applied between the transparent electrodes 25 and 35.
  • the transparent electrodes 25 and 35 are made, for example, of ITO (indium tin oxide) and the insulator 28, 32 is made of SiO 2 , for example.
  • the transmissive electro-optical element 10 ' is basically similar to the transmissive electro-optical element 10 from FIG. 1 and does not need to be described in detail again.
  • the transmissive electro-optical element 10 ' has no independent orientation layers 29 and 31, since their function is taken over by the respective light polarizer layer 25' or 35 '.
  • Both the light polarizer layer 25 and 35 (FIG. 1) and the light polarizer layer 25 ′ and 35 ′ (FIG. 2) provided with the properties of the orientation layer are made insoluble by chemical treatment for water and the liquid crystal filling of the liquid crystal layer 30. What is essential in both of the exemplary embodiments described above is the arrangement of the
  • Light polarizer layer 25, 35 or 25 ', 35' to the inside of the transmissive electro-optical element 10 or 10 ', so that the light-polarizer layer, which is inherently UV-sensitive and sensitive to mechanical influences, is protected against external influences.
  • Figure 3 shows the usual structure of a TN cell as a transmissive electro-optical element 10 "with orientation layers 29 and 31, but without an internal polarizer.
  • FIG. 4 shows an example of the application of the continuously electrically switchable transmissive electro-optical element 10 or 10 ′ according to FIGS. 1 and 2 in the case of a pane arrangement in the form of insulating glazing 11 between the outer pane 12 and the inner pane 14 provided at a distance therefrom by means of a spacer 13.
  • the connection between the outer pane 12, spacer 13 and inner pane 14 takes place in the usual diffusion-tight manner with the aid of a sealing element 15.
  • the interior 16 between the outer pane 12 and the inner pane 14 is equipped here in a symmetrical manner (or also asymmetrically) with the continuously electrically switchable transmissive electro-optical element 10 or 10 ', the element 10, 10' having approximately the same areal dimension as the disks 12 and 14 has and is held, for example, in a groove 18 of the spacer 13.
  • a continuously electrically switchable transmissive electro-optical element 10 "according to FIG. 3 is held in the center or off-center, which differs from the exemplary embodiment according to FIG the light polarizer layers 25 and 35 arranged there within the element 10 are now arranged as light polarizer layers 25 ′′ and 35 ′′ on the inside 36 of the outer pane 12 and on the inside 37 of the electro-optical element 10.
  • the light polarizer layers 25 "and 35” are applied directly to the inside 36 of the outer pane 12 and directly to the inside 37 of the electro-optical element 10 "as a flat coating or as a film.
  • the transmissive electro-optical element 10" can also be used or also be formed without an insulator 28, 32.
  • a pane of insulating glazing for example the outer pane 12, takes over the task of one carrier substrate.
  • the overall structure of the transmissive electro-optical element 10, 10 ′ corresponds in principle to FIG. 1 or FIG. 2 or possibly also FIG. 3.
  • pane arrangement shown in FIGS. 4, 5 and 6 is also described in connection with insulating glazing 11, it goes without saying that such a pane arrangement can also be used independently
  • Single pane arrangement or multiple pane arrangement can be used not only for windows but also for doors, internal partitions, external facades, motor vehicle panes, displays and the like.
  • the electrically conductive transparent electrode 27, 33 can be structured in such a way that individual pixels are formed which can be designed in a variable manner in terms of their size and shape.
  • the individual structure points are provided with corresponding color filters and with passive control or with an active matrix control of the structure elements (pixels).
  • the liquid crystal layer 30 can consist of a ne atic liquid crystal or of a cholesteric or of a so-called guest-host liquid crystal or of a bistable liquid crystal.
  • Liquid crystal layer 30 can be spacers which ensure a defined distance between the carrier substrates 26, 34.
  • the light polarizer layer 25, 35 can be embodied as a film or as polarizing glass or in the form of liquid crystal polarizers.
  • the carrier substrates 26, 34 can be connected to one another at the edge and tightly enclose the liquid crystal layer 30.
  • the carrier substrate 26, 34 can be designed as polarizing glass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Liquid Crystal (AREA)

Abstract

Elément électro-optique (10) transmissif électriquement commutable pour un ensemble à vitres (11) pour fenêtres, portes, parois de séparation, façades et analogues. Ledit élément est constitué d'une couche de cristaux liquides (30) sur chacune des deux faces de laquelle sont placés une électrode transparente (27, 33) et un substrat de support (26, 34). L'objet de la présente invention est de faire en sorte que les polariseurs de lumière soient protégés des influences extérieures et que cet élément électro-optique (10) transmissif puisse être fabriqué de manière économique. A cet effet, une couche de polarisation de lumière (25, 35) est placée à l'intérieur de l'élément (10), directement ou indirectement adjacente à chaque face de la couche de cristaux liquides (30).
EP03730014A 2002-05-18 2003-05-13 Element electro-optique transmissif et ensemble a vitres dote dudit element Withdrawn EP1506449A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10223083 2002-05-18
DE10223083A DE10223083A1 (de) 2002-05-18 2002-05-18 Transmissives elektrooptisches Element und damit versehene Scheibenanordnung
PCT/EP2003/004962 WO2003098271A2 (fr) 2002-05-18 2003-05-13 Element electro-optique transmissif et ensemble a vitres dote dudit element

Publications (1)

Publication Number Publication Date
EP1506449A2 true EP1506449A2 (fr) 2005-02-16

Family

ID=29414121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03730014A Withdrawn EP1506449A2 (fr) 2002-05-18 2003-05-13 Element electro-optique transmissif et ensemble a vitres dote dudit element

Country Status (6)

Country Link
US (1) US20060164569A1 (fr)
EP (1) EP1506449A2 (fr)
CN (1) CN100414376C (fr)
AU (1) AU2003240627A1 (fr)
DE (1) DE10223083A1 (fr)
WO (1) WO2003098271A2 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2013140052A1 (fr) * 2012-03-22 2013-09-26 Sunpartner Capteur d'énergie solaire transparent

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DE102009045131A1 (de) 2009-09-29 2011-03-31 Robert Bosch Gmbh Adaptives optisches Modul mit schaltbarer Transparenz
FR2951287B1 (fr) * 2009-10-09 2011-12-16 Activeyes Lunettes a cristaux liquides a bruit de commutation attenue
US10303035B2 (en) * 2009-12-22 2019-05-28 View, Inc. Self-contained EC IGU
WO2012078634A2 (fr) 2010-12-08 2012-06-14 Soladigm, Inc. Espaceurs améliorés destinés à des éléments de vitrage isolant
CN202189212U (zh) * 2011-08-18 2012-04-11 京东方科技集团股份有限公司 一种透反型电致变色液晶显示器
GB2515264A (en) * 2013-05-03 2014-12-24 Pro Display Tm Ltd Improved method of forming switchable glass
JP7142422B2 (ja) * 2017-08-30 2022-09-27 株式会社イトーキ 透過率管理装置、透過率管理方法、透過率管理プログラム及び透過率管理システム
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Publication number Priority date Publication date Assignee Title
WO2013140052A1 (fr) * 2012-03-22 2013-09-26 Sunpartner Capteur d'énergie solaire transparent
FR2988466A1 (fr) * 2012-03-22 2013-09-27 Sunpartner Capteur d'energie solaire transparent

Also Published As

Publication number Publication date
WO2003098271A2 (fr) 2003-11-27
DE10223083A1 (de) 2003-12-04
US20060164569A1 (en) 2006-07-27
AU2003240627A1 (en) 2003-12-02
AU2003240627A8 (en) 2003-12-02
WO2003098271A3 (fr) 2004-04-08
CN1653379A (zh) 2005-08-10
CN100414376C (zh) 2008-08-27

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