WO2006079587A1 - Electrophoretic display film - Google Patents

Electrophoretic display film Download PDF

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Publication number
WO2006079587A1
WO2006079587A1 PCT/EP2006/050170 EP2006050170W WO2006079587A1 WO 2006079587 A1 WO2006079587 A1 WO 2006079587A1 EP 2006050170 W EP2006050170 W EP 2006050170W WO 2006079587 A1 WO2006079587 A1 WO 2006079587A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrophoretic display
chambers
display film
particles
efb
Prior art date
Application number
PCT/EP2006/050170
Other languages
German (de)
French (fr)
Inventor
Ralf Hying
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2006079587A1 publication Critical patent/WO2006079587A1/en

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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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis

Definitions

  • the invention relates to an electrophoretic display film according to the preamble of patent claim 1 or 2.
  • the electrophoretic display sheet EF has a Lö ⁇ on solution-filled micro-chambers.
  • the solution contains, for example, negatively charged particles (FIG
  • the action of an electric field can be moved to the upper (FIG. 1 c) or underside (FIG. 1 b) of the foil EF.
  • a display surface for example, the top of the film, either the color of the solution (black) or the color of the particles (white) visible.
  • the respective position of the particles is maintained until the next time the field is created.
  • the electric field is, for example, he demonstrates between an area-speaking counter electrode and a metal stylus tip ⁇ . Furthermore, the display film can be connected via an electrode structure are moved while throwing the image content generated on the slide.
  • the invention has for its object to provide a display screen that allows a multi-colored display of content.
  • the display film according to the invention allows the representation of complex or visually appealing drawings and notes by the Mehr ⁇ color.
  • Figure 1 shows the operation of an electrophoretic display
  • FIG 2 shows the display film according to the invention.
  • the inventively embodied electrophoretic display ⁇ film allows multi-colored writing and drawing. This is achieved by chambers (EFR, EFB), the possibilities with liquid ⁇ different colors are filled. In an alternative embodiment, the particles contained in the chambers (EFR, EFB) are colored differently.
  • FIG. 2 shows the corresponding structure for three colors.
  • white serves as the primary color, through the charged white particles contained in the chambers.
  • the cross section through the electrophoretic film EF shows that the chambers EFR, EFB are also alternately filled with liquids of different colors, for example red and blue. Gleichfar ⁇ bige chambers EFR, EFB are preferably arranged in rows or in columns shaped. For a "colored writing" are then to control, for example, by a corresponding arrangement of the counter electrodes, the desired color chambers.
  • the display film according to the invention also allows mixed colors. If you were to the two ink chambers drives in the example above common for red and blue colors, the "Schriftfar ⁇ be" would be a violet color as a combination of blue and red. A Ii neares relationship between electric field and color change provided can by combining Of red, green and blue chambers and the generation of a corresponding e- lektrischen field for each primary color almost any mixed colors are generated.
  • the microcompartments should be made sufficiently small so that the viewer can no longer visually resolve them.

Abstract

The invention relates to an electrophoretic display film, comprising a solution that is held in respective micro-chambers and that contains charged particles. Said particles can be positioned by means of an applied electric field. According to the invention, the solutions in the chambers (EFR, EFB) are of different colours.

Description

ELEKTROPHORETISCHE ANZEIGFOLIEELECTROPHORETIC DISPLAY FILM
Elektrophoretische DisplayfolieElectrophoretic display film
Die Erfindung betrifft eine elektrophoretische Displayfolie gemäß dem Oberbegriff des Patentanspruchs 1 beziehungsweise 2.The invention relates to an electrophoretic display film according to the preamble of patent claim 1 or 2.
In vielen Bereichen des Alltags werden von Hand gefertigte Zeichnungen oder Notizen zur Informations-Übertragung oder - speicherung benutzt . Dieses Vorgehen ist mit einigen Nachtei¬ len behaftet , so beispielsweise der hohe Aufwand zum Kopieren und Verteilen der Notizen, die Notwendigkeit , ständig für Er¬ satzpapier sorgen zu müssen, und die fehlende Möglichkeit , Geschriebenes zu löschen .In many areas of everyday life, hand-made drawings or notes are used for information transmission or storage. This approach is fraught with some len Nachtei ¬, such as the high cost for copying and distributing the notes that need to constantly have to ensure he set ¬ paper, and the inability to delete Written.
Derzeit entwickeln weltweit einige Firmen elektronische Dis¬ plays , die sich der Elektrophorese zur Darstellung von Bild¬ inhalten bedienen . Diese Folien werden auch als elektronische Tinte bezeichnet . Das Funktionsprinzip einer elektrophoreti- schen Displayfolie EF ist in Figur 1 schematisch dargestellt .Currently, some companies are developing electronic Dis ¬ plays, the electrophoresis employ content for displaying image ¬ worldwide. These slides are also referred to as electronic ink. The functional principle of an electrophoretic display film EF is shown schematically in FIG.
Die elektrophoretischen Displayfolie EF weist mit einer Lö¬ sung gefüllte Mikrokammern auf . Die Lösung enthält beispiels- weise negativ geladene Partikel (Figur 1 a) , die sich unterThe electrophoretic display sheet EF has a Lö ¬ on solution-filled micro-chambers. The solution contains, for example, negatively charged particles (FIG
Einwirkung eines elektrischen Feldes je nach dessen Polarität an die Ober- (Figur 1 c) oder Unterseite (Figur 1 b) der Folie EF bewegen . Für den Betrachter wird somit auf einer Anzeigefläche, beispielsweise die Oberseite der Folie, entweder die Farbe der Lösung ( schwarz ) oder die Farbe der Partikel (weiss ) sichtbar . Die jeweilige Position der Partikel wird bis zum nächstmaligen Anlegen des Feldes beibehalten .Depending on its polarity, the action of an electric field can be moved to the upper (FIG. 1 c) or underside (FIG. 1 b) of the foil EF. For the viewer is thus on a display surface, for example, the top of the film, either the color of the solution (black) or the color of the particles (white) visible. The respective position of the particles is maintained until the next time the field is created.
Das elektrische Feld wird beispielsweise zwischen einer flä- chigen Gegenelektrode und einer metallischen Stiftspitze er¬ zeugt . Weiter kann die Displayfolie über eine Elektroden- struktur bewegt werden und dabei der Bildinhalt auf der Folie generiert werfen .The electric field is, for example, he demonstrates between an area-speaking counter electrode and a metal stylus tip ¬. Furthermore, the display film can be connected via an electrode structure are moved while throwing the image content generated on the slide.
Der Erfindung liegt die Aufgabe zugrunde, eine Displayfolie anzugeben, die eine mehrfarbige Darstellung von Inhalten ermöglicht .The invention has for its object to provide a display screen that allows a multi-colored display of content.
Diese Aufgabe wird erfindungsgemäß durch die im Patentan¬ spruch 1 angegebenem Merkmale gelöst .This object is achieved by the features specified in patent ¬ claim 1 features.
Die erfindungsgemäße Displayfolie ermöglicht durch die Mehr¬ farbigkeit die Darstellung von komplexen oder optisch ansprechenden Zeichnungen und Notizen .The display film according to the invention allows the representation of complex or visually appealing drawings and notes by the Mehr ¬ color.
Im Folgenden wird die Erfindung an Hand eines in der Zeichnung dargestellten Ausführungsbeispiele beschrieben . Dabei zeigen :In the following the invention will be described with reference to an exemplary embodiment shown in the drawing. Showing:
Figur 1 die Wirkungsweise eines Elektrophoretischen Displays , undFigure 1 shows the operation of an electrophoretic display, and
Figur 2 die erfindungsgemäße Displayfolie .2 shows the display film according to the invention.
Die erfindungsgemäß ausgebildete elektrophoretische Display¬ folie ermöglicht ein mehrfarbiges Schreiben und Zeichnen . Dies wird erreicht durch Kammern (EFR, EFB) , die mit Flüssig¬ keiten unterschiedlicher Farben gefüllt sind . Bei einer alternativen Ausführungsform sind die in den Kammern (EFR, EFB) enthaltenen Partikel unterschiedlich gefärbt .The inventively embodied electrophoretic display ¬ film allows multi-colored writing and drawing. This is achieved by chambers (EFR, EFB), the possibilities with liquid ¬ different colors are filled. In an alternative embodiment, the particles contained in the chambers (EFR, EFB) are colored differently.
Die Figur 2 zeigt den entsprechenden Aufbau für drei Farben . Hierbei dient Weiss als Grundfarbe, durch die in den Kammern enthaltenen geladenen weißen Partikel . Der Querschnitt durch die elektrophoretische Folie EF zeigt , dass die Kammern EFR, EFB außerdem abwechselnd mit Flüssigkeiten unterschiedlicher Farben, beispielsweise rot und blau, gefüllt sind . Gleichfar¬ bige Kammern EFR, EFB sind vorzugsweise reihen- oder spalten- förmig angeordnet . Für ein „farbiges Schreiben" sind dann beispielsweise durch eine entsprechende Anordnung der Gegenelektroden die gewünschten Farbkammern anzusteuern .FIG. 2 shows the corresponding structure for three colors. Here, white serves as the primary color, through the charged white particles contained in the chambers. The cross section through the electrophoretic film EF shows that the chambers EFR, EFB are also alternately filled with liquids of different colors, for example red and blue. Gleichfar ¬ bige chambers EFR, EFB are preferably arranged in rows or in columns shaped. For a "colored writing" are then to control, for example, by a corresponding arrangement of the counter electrodes, the desired color chambers.
Die erfindungsgemäße Displayfolie lässt auch Mischfarben zu . Würde man in obigem Beispiel die beiden Farbkammern für rot und blaue Farbe gemeinsam ansteuert , so wäre die „Schriftfar¬ be" ein Violett-Ton als Kombination aus blau und rot . Ein Ii- neares Verhältnis zwischen elektrischem Feld und Farbumschlag vorausgesetzt , können durch Kombination von roten, grünen und blauen Kammern sowie der Erzeugung eines entsprechenden e- lektrischen Feldes für jede Grundfarbe annähernd beliebige Mischfarben erzeugt werden .The display film according to the invention also allows mixed colors. If you were to the two ink chambers drives in the example above common for red and blue colors, the "Schriftfar ¬ be" would be a violet color as a combination of blue and red. A Ii neares relationship between electric field and color change provided can by combining Of red, green and blue chambers and the generation of a corresponding e- lektrischen field for each primary color almost any mixed colors are generated.
Insbesondere für die Darstellung von Mischfarben sollten die Mikrokammern ausreichend klein ausgebildet sein, so dass der Betrachter diese nicht mehr optisch auflösen kann . In particular, for the representation of mixed colors, the microcompartments should be made sufficiently small so that the viewer can no longer visually resolve them.

Claims

Patentansprüche claims
1. Elektrophoretische Displayfolie, die jeweils eine in Mik- rokammern gefasste Lösung mit geladenen Partikeln aufweist , die über ein anliegendes elektrisches Feld positionierbar sind, wobei die positionierten Partikel ihre Positionen bis zum nächstmaligen Anlegen des Feldes beibehalten, d a d u r c h g e k e n n z e i c h n e t d a s s Lösungen in Kammern (EFR, EFB) unterschiedliche Farben auf- weisen .1. Electrophoretic display film, each having a micro-chambered solution of charged particles which are positionable via an applied electric field, the positioned particles maintaining their positions until the next application of the field, characterized in that solutions in chambers (EFR, EFB) have different colors.
2. Elektrophoretische Displayfolie, die jeweils eine in Mik- rokammern gefasste Lösung mit geladenen Partikeln aufweist , die über ein anliegendes elektrisches Feld positionierbar sind, wobei die positionierten Partikel ihre Positionen bis zum nächstmaligen Anlegen des Feldes beibehalten, d a d u r c h g e k e n n z e i c h n e t d a s s Partikel in Kammern (EFR, EFB) unterschiedliche Farben auf¬ weisen . 2. Electrophoretic display film, each having a micro-chambered solution of charged particles which are positionable via an applied electric field, the positioned particles retaining their positions until the next application of the field, characterized in that particles in chambers (EFR, EFB) different colors on ¬ point.
PCT/EP2006/050170 2005-01-28 2006-01-12 Electrophoretic display film WO2006079587A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005004156A DE102005004156A1 (en) 2005-01-28 2005-01-28 Electrophoretic display film
DE102005004156.6 2005-01-28

Publications (1)

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WO2006079587A1 true WO2006079587A1 (en) 2006-08-03

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999053373A1 (en) * 1998-04-10 1999-10-21 E-Ink Corporation Full color reflective display with multichromatic sub-pixels
US20020131147A1 (en) * 1998-08-27 2002-09-19 Paolini Richard J. Electrophoretic medium and process for the production thereof
US20030214697A1 (en) * 2001-12-13 2003-11-20 E Ink Corporation Electrophoretic electronic displays with low-index films

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6930818B1 (en) * 2000-03-03 2005-08-16 Sipix Imaging, Inc. Electrophoretic display and novel process for its manufacture
US6972893B2 (en) * 2001-06-11 2005-12-06 Sipix Imaging, Inc. Process for imagewise opening and filling color display components and color displays manufactured thereof
US6788452B2 (en) * 2001-06-11 2004-09-07 Sipix Imaging, Inc. Process for manufacture of improved color displays
JPWO2004006006A1 (en) * 2002-07-09 2005-11-04 株式会社ブリヂストン Image display device
JP2005037851A (en) * 2003-06-24 2005-02-10 Seiko Epson Corp Electrophoretic dispersion, electrophoresis display device, method for manufacturing electrophoresis display device, and electronic appliance

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999053373A1 (en) * 1998-04-10 1999-10-21 E-Ink Corporation Full color reflective display with multichromatic sub-pixels
US20020131147A1 (en) * 1998-08-27 2002-09-19 Paolini Richard J. Electrophoretic medium and process for the production thereof
US20030214697A1 (en) * 2001-12-13 2003-11-20 E Ink Corporation Electrophoretic electronic displays with low-index films

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