EP2329316A1 - Affichage électrochromique organique à effets optiques - Google Patents

Affichage électrochromique organique à effets optiques

Info

Publication number
EP2329316A1
EP2329316A1 EP09782251A EP09782251A EP2329316A1 EP 2329316 A1 EP2329316 A1 EP 2329316A1 EP 09782251 A EP09782251 A EP 09782251A EP 09782251 A EP09782251 A EP 09782251A EP 2329316 A1 EP2329316 A1 EP 2329316A1
Authority
EP
European Patent Office
Prior art keywords
layer
insulating layer
electrode
optical effects
electrochromic
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Withdrawn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
EP09782251A
Other languages
German (de)
English (en)
Inventor
Marek Maleika
Gotthard Rieger
Wolfgang Roth
Julia Wirsing
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2329316A1 publication Critical patent/EP2329316A1/fr
Withdrawn legal-status Critical Current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 
    • G02F1/15—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 an electrochromic effect
    • G02F1/153—Constructional details
    • G02F1/1533—Constructional details structural features not otherwise provided for
    • 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 
    • G02F1/15—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 an electrochromic effect
    • G02F1/153—Constructional details
    • G02F1/1533—Constructional details structural features not otherwise provided for
    • G02F2001/1536—Constructional details structural features not otherwise provided for additional, e.g. protective, layer inside the cell

Definitions

  • the invention relates to organic electrochromic displays with optical effects.
  • Displays based on electrochromic materials which are present in a pasty formulation are characterized by a very simple layer structure. This usually consists of a back carrier with baking electrode, an electrochromic active layer and a viewing electrode. The operation of the display is achieved by applying a voltage and forming a current between the electrodes. The color change takes place directly at the contact surface of transparent electrode and electrochromic layer by electrochemical reaction and formation of a layer with specific optical absorption.
  • the contact surface of the viewing electrode is limited in such a way that only those regions or segments are connected which are intended to show a color change.
  • the limitation is currently achieved simply by a transparent insulating layer which can be opened or by a structuring of the electrode layer. This allows the areas or segments to be individually controlled and switched. Within the individual segments, it is not possible to form optical effects. So far, the resolution of electrochromic displays and organic LCD displays has traditionally been achieved by the construction of higher-resolution matrices, each with individually addressable pixels.
  • the staining within the switched segments is uniform and the staining is uniform throughout the non-switched areas. Certain variations occur only at the edges or at locations where field exaggeration occurs.
  • a disadvantage of the known systems is that within the switched surfaces no further optical effects, such as the representation of different brightness values, brightness transitions, lighting and 3D effects, as they are known from high-resolution products of the printing industry (magazines, photographs), can be mapped ,
  • the object of the present invention is therefore to provide a device for an electrochromic organic component, such as a display, by means of which optical effects can be produced within a uniformly controlled segment, an electrochromic display.
  • the subject matter of the invention is an organic electrochromic display, at least two electrode layers with an electrochromically switchable, organically active layer, wherein the organically active layer or an electrode layer is divided into individually controllable segments and at least one segment an insulating layer between the electrode layer and the electrochromic switchable has organically active layer, which is divided into isolation islands and contact openings, so that optical effects can be imaged within a switched segment by the variation of the density of the isolation points or the contact openings in the insulating layer.
  • the insulating layer of photoresist in particular one which is stable to polyether alcohol or another common, structurable by conventional structuring materials.
  • the material of the insulating layer is on the one hand stable against the adjacent electrochromic active layer and on the other hand inert, so that no damage to the adjacent Layers can be formed by contact with the insulation layer.
  • the insula tion islands approximately round or square openings - hereinafter also called pixels - through which the carrier flow can flow from the electrode to the organically active electrochromic switchable.
  • the size of the openings may vary, for example, it is in the range of 10 to 30 ⁇ m.
  • the size of the pixels and their distribution density results in the resolution of the display and the optical representation.
  • pixels For example, with a pixel size of about 20 microns on an area of 1 cm 2 are about 250 000 pixels. This corresponds to a full color impression. By appropriate reduction of pixels color shades are produced. For example, fading in a surface may be created by varying the diameters of the apertures and / or the density of the apertures.
  • the pixels correspond to openings in the insulating layer. The openings are filled with electrochromically active paste or wetted by the dye solution contained therein) and have the corresponding color impression on electrical wiring.
  • the insulating layer itself is usually applied and structured by simple printing methods, for example offset and flexo, and inkjet printing.
  • simple printing methods for example offset and flexo, and inkjet printing.
  • the figure shows the layer structure of an electrochromic cell, which constitutes for example a part of an electrochromic display according to the invention.
  • the figure shows a cross section through the stack from which the cell is constructed.
  • the carrier layer is the carrier layer, the substrate.
  • This layer can be optically transparent so that the color change of the electrochromically active organic layer can also be made visible on the reverse side.
  • the material is not critical, the substrate may consist of glass, plastic, flexible film, etc.
  • the subsequent layer is an optionally transparent electrode layer 4, wherein the transparency may be inherent in the electrode material as well as being producible via the layer thickness.
  • a thinnest metal electrode layer can be just as transparent as the known ITO electrode layers in which the material (indium tin oxide) itself is transparent.
  • the electrochromic active layer 3 On the electrode layer 4, also called bottom electrode, for example, the electrochromic active layer 3, preferably as a formulation in the form of a paste. This paste is preferably applied to the substrate 5 provided with the electrode layer 4 by means of a doctor blade or screen printing technique.
  • the thickness of the insulation layer varies depending on the deposition method, but is in the range of less than 100 nm-1 ⁇ m.
  • the electrochromically active organic layer 3 is significantly thicker than the other layers of the electrochromic cell, since there is a paste which can not be applied as a thin film like the other layers.
  • the insulating layer 2 which according to the invention is not a continuous layer, but is structured and in addition to isolation islands also shows contact openings, so that a charge carrier flow between the electrochromic paste 3 and the
  • Electrode layer 1 is formed through the corresponding openings of the insulating layer 2 therethrough.
  • the electrode layer 1 is the so-called top electrode layer and therefore transparent, so that the insulating layer is also usually transparent.
  • the usual angle of view on the electrochromic display is through the transparent top electrode 1, which is preferably made of ITO or another transparent and conductive material, wherein the transparency can be inherent to the electrode material as well as can be generated over the layer thickness.
  • a thinnest metal electrode layer may be just as transparent as the known ITO electrode layers in which the material (indium tin oxide) itself is transparent.
  • the insulating layer 2 is transparent in this embodiment, because otherwise the color change of the electrochromic paste would not be apparent, and preferably a material processable from solution, so that it can be applied by means of the usual printing methods.
  • high-resolution printing techniques are used here, for example OFSET, InkJet, etc., with the help of which both large, for example up to 50 ⁇ m and smaller, for example 5 ⁇ m and less; So also denser or less dense set insulation islands or openings can be displayed.
  • a material processable from solution is readily soluble in the printing, in particular in photoresists, conventional solvents, such as ethanol, glycol, diethylene glycol, esters, so that it can be applied as a solution, that is vertikbar.
  • solvents such as ethanol, glycol, diethylene glycol, esters
  • it usually has in the solution a consistency that is vertikbar and after completion of printing and / or after removal of the solvent, which are desired properties of the layer to be produced.
  • the insulating layer 2 lies between the transparent electrode and the electrochromically active layer.
  • the invention should not be limited to this stack construction, but rather it is also intended to place the insulation layer between the baking electrode and the electrochromically active layer. This can be done alternatively or in addition to the shown layer structure.
  • the invention relates to organic electrochromic displays with optical effects.
  • a method is described by means of suitable technical methods to achieve a structuring of the insulating layer, by means of which novel optical effects are to be formed in electrochromic displays.
  • resolutions as they are known from the printing industry, realize.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

L'invention porte sur des affichages électrochromiques organiques ayant des effets optiques. On y décrit un procédé pour obtenir, à l'aide de procédés techniques appropriés, une structuration de la couche isolante (2), par l'intermédiaire de laquelle il est possible de former de nouveaux effets optiques dans des affichages électrochromiques, ce qui permet d'obtenir des résolutions telles que celles qui sont connues dans l'industrie de l'imprimerie.
EP09782251A 2008-09-30 2009-08-27 Affichage électrochromique organique à effets optiques Withdrawn EP2329316A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810049713 DE102008049713B4 (de) 2008-09-30 2008-09-30 Organisches elektrochromes Display mit optischen Effekten
PCT/EP2009/061037 WO2010037604A1 (fr) 2008-09-30 2009-08-27 Affichage électrochromique organique à effets optiques

Publications (1)

Publication Number Publication Date
EP2329316A1 true EP2329316A1 (fr) 2011-06-08

Family

ID=41259497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09782251A Withdrawn EP2329316A1 (fr) 2008-09-30 2009-08-27 Affichage électrochromique organique à effets optiques

Country Status (3)

Country Link
EP (1) EP2329316A1 (fr)
DE (1) DE102008049713B4 (fr)
WO (1) WO2010037604A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011101267A1 (de) 2011-05-11 2012-11-15 Faubel & Co. Nachfolger Gmbh Fernaktualisierung von Logistikdaten

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002075441A2 (fr) * 2001-03-19 2002-09-26 Dow Global Technologies Inc. Dispositif d'affichage electrochromique et compositions utilisees pour fabriquer de tels dispositifs

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5727460B2 (fr) * 1974-06-25 1982-06-10
US4940315A (en) * 1988-10-05 1990-07-10 Ford Motor Company Patterning of insulator on electrochromic material as determinant for area of coloration
EP1271227A1 (fr) * 2001-06-26 2003-01-02 Nanomat Limited Dispositif d'affichage électrochromique à haute resolution et procédé pour sa production
JP2003021848A (ja) 2001-07-06 2003-01-24 Sony Corp 表示素子
CN101116030A (zh) 2005-02-09 2008-01-30 皇家飞利浦电子股份有限公司 具有固体氧化还原中心的显示装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002075441A2 (fr) * 2001-03-19 2002-09-26 Dow Global Technologies Inc. Dispositif d'affichage electrochromique et compositions utilisees pour fabriquer de tels dispositifs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2010037604A1 *

Also Published As

Publication number Publication date
DE102008049713A1 (de) 2010-04-01
DE102008049713B4 (de) 2015-04-09
WO2010037604A1 (fr) 2010-04-08

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