DE2260048

An image display cell having a transparent wall portion, electrodes and an oxidizable redox substance and a reducible redox substance in an electrochemically inert liquid in contact with electrodes. The cell includes at least two electrodes which are in contact with a cell liquid in which a colourle...

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Bibliographic Details
Main Authors DAM, HENDRIK TJAPKO VAN, SCHOOT, CORNELIS JOHANNES, PONJEE, JOHANNES JACOBUS
Format Patent
LanguageEnglish
Published 20.03.1980
Edition3
Subjects
ADHESIVES
ADVERTISING
CHEMISTRY
CRYPTOGRAPHY
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING
DISPLAY
DISPLAYING
DYES
EDUCATION
FREQUENCY-CHANGING
LABELS OR NAME-PLATES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
PAINTS
PHYSICS
POLISHES
SEALS
SIGNS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Summary:An image display cell having a transparent wall portion, electrodes and an oxidizable redox substance and a reducible redox substance in an electrochemically inert liquid in contact with electrodes. The cell includes at least two electrodes which are in contact with a cell liquid in which a colourless viologen salt (formula I) has been dissolved. When a potential difference of at least 0.5 Volt is applied to the electrodes, this salt is reduced to a coloured insoluble compound which adheres to the cathode, so that the latter is coloured, thereby producing an image.
Bibliography:Application Number: DE19722260048