WO2008008757A3 - Electrophoretic medium with improved image stability - Google Patents

Electrophoretic medium with improved image stability Download PDF

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Publication number
WO2008008757A3
WO2008008757A3 PCT/US2007/073127 US2007073127W WO2008008757A3 WO 2008008757 A3 WO2008008757 A3 WO 2008008757A3 US 2007073127 W US2007073127 W US 2007073127W WO 2008008757 A3 WO2008008757 A3 WO 2008008757A3
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
polymer
electrophoretic medium
improved image
image stability
Prior art date
Application number
PCT/US2007/073127
Other languages
French (fr)
Other versions
WO2008008757A2 (en
Inventor
Charles Howie Honeyman
Thomas H Whitesides
Michael D Walls
Original Assignee
E Ink Corp
Charles Howie Honeyman
Thomas H Whitesides
Michael D Walls
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 E Ink Corp, Charles Howie Honeyman, Thomas H Whitesides, Michael D Walls filed Critical E Ink Corp
Priority to JP2009519627A priority Critical patent/JP5070285B2/en
Priority to EP07840383.9A priority patent/EP2041739B1/en
Publication of WO2008008757A2 publication Critical patent/WO2008008757A2/en
Publication of WO2008008757A3 publication Critical patent/WO2008008757A3/en

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 
    • G02F1/165—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
    • 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
    • G02F1/1675—Constructional details
    • G02F2001/1678—Constructional details characterised by the composition or particle type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y10T428/2998—Coated including synthetic resin or polymer

Abstract

An electrophoretic medium comprises a fluid and a plurality of electrically charged particles disposed in the fluid and capable of moving therethrough on application of an electrical field to the medium. Each of the charged particles has a polymer coating comprising a first group. A polymer is dispersed in the fluid, this polymer having a plurality of second groups capable of attracting the first groups on the particles so that the polymer in the fluid forms a complex with the electrophoretic particles.
PCT/US2007/073127 2006-07-11 2007-07-10 Electrophoretic medium with improved image stability WO2008008757A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2009519627A JP5070285B2 (en) 2006-07-11 2007-07-10 Electrophoretic medium with improved image stability
EP07840383.9A EP2041739B1 (en) 2006-07-11 2007-07-10 Electrophoretic medium with improved image stability

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US80698706P 2006-07-11 2006-07-11
US60/806,987 2006-07-11

Publications (2)

Publication Number Publication Date
WO2008008757A2 WO2008008757A2 (en) 2008-01-17
WO2008008757A3 true WO2008008757A3 (en) 2008-04-24

Family

ID=38924083

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/073127 WO2008008757A2 (en) 2006-07-11 2007-07-10 Electrophoretic medium with improved image stability

Country Status (4)

Country Link
US (1) US7903319B2 (en)
EP (1) EP2041739B1 (en)
JP (2) JP5070285B2 (en)
WO (1) WO2008008757A2 (en)

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