NL7611240A - Display cell with memory effect - contains bipyridine salt or polymer in mixt. of water and inert organic solvent acting as antifreeze (NL 14.11.77) - Google Patents

Display cell with memory effect - contains bipyridine salt or polymer in mixt. of water and inert organic solvent acting as antifreeze (NL 14.11.77)

Info

Publication number
NL7611240A
NL7611240A NL7611240A NL7611240A NL7611240A NL 7611240 A NL7611240 A NL 7611240A NL 7611240 A NL7611240 A NL 7611240A NL 7611240 A NL7611240 A NL 7611240A NL 7611240 A NL7611240 A NL 7611240A
Authority
NL
Netherlands
Prior art keywords
mixt
antifreeze
polymer
organic solvent
water
Prior art date
Application number
NL7611240A
Other languages
Dutch (nl)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Priority to NL7611240A priority Critical patent/NL7611240A/en
Priority to US05/736,485 priority patent/US4116535A/en
Priority to DE2718910A priority patent/DE2718910C2/en
Priority to CA277,649A priority patent/CA1099091A/en
Priority to AU24962/77A priority patent/AU512745B2/en
Priority to GB19067/77A priority patent/GB1564266A/en
Priority to JP5272277A priority patent/JPS52135884A/en
Priority to FR7714211A priority patent/FR2351463A1/en
Publication of NL7611240A publication Critical patent/NL7611240A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K9/00—Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
    • C09K9/02—Organic tenebrescent materials
    • 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
    • G02F1/1503—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 caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions

Abstract

Display cell with memory effect has a housing, with a transparent wall section, contg. a reversibly reducible redox cpd. (I) dissolved in an electrochemically inert liq. (II) in contact with >=2 electrodes. (II) is a mixt. of water and an inert organic solvent (IIa) and (Ie is a 4,4'-bipyridine cpd. of formula (Ia) or a bipyridine cpd. of formula (Ib)(where R1 and R2 are 4-8C alkyl; R3 and R4 are 1-4C alkyl or benzyl; X- is ClO4', NO3', H2PO4' or BF4'; Y- is ClO4', BF4', H2PO '4 or PF6') or a bipyridien polymer (Ic), obtd. by reacting 4,4'-bipyridyl and alpha, omega-dibromobutane in a polar aprotic solvent and then replacing the Br ion by a ClO'4, H2PO4 degrees or BF4' ion, Solvent (IIa) acts as antifreeze.
NL7611240A 1976-05-10 1976-10-12 Display cell with memory effect - contains bipyridine salt or polymer in mixt. of water and inert organic solvent acting as antifreeze (NL 14.11.77) NL7611240A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL7611240A NL7611240A (en) 1976-10-12 1976-10-12 Display cell with memory effect - contains bipyridine salt or polymer in mixt. of water and inert organic solvent acting as antifreeze (NL 14.11.77)
US05/736,485 US4116535A (en) 1976-05-10 1976-10-28 Picture display cell with memory effect
DE2718910A DE2718910C2 (en) 1976-05-10 1977-04-28 Image display cell with memory effect
CA277,649A CA1099091A (en) 1976-05-10 1977-05-04 Picture display cell with memory effect
AU24962/77A AU512745B2 (en) 1976-05-10 1977-05-06 Redox display
GB19067/77A GB1564266A (en) 1976-05-10 1977-05-06 Picture display cell with memory effect
JP5272277A JPS52135884A (en) 1976-05-10 1977-05-10 Image display cell
FR7714211A FR2351463A1 (en) 1976-05-10 1977-05-10 MEMORY EFFECT IMAGE REPRODUCING CELL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7611240A NL7611240A (en) 1976-10-12 1976-10-12 Display cell with memory effect - contains bipyridine salt or polymer in mixt. of water and inert organic solvent acting as antifreeze (NL 14.11.77)

Publications (1)

Publication Number Publication Date
NL7611240A true NL7611240A (en) 1978-04-14

Family

ID=19827033

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7611240A NL7611240A (en) 1976-05-10 1976-10-12 Display cell with memory effect - contains bipyridine salt or polymer in mixt. of water and inert organic solvent acting as antifreeze (NL 14.11.77)

Country Status (1)

Country Link
NL (1) NL7611240A (en)

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Legal Events

Date Code Title Description
BV The patent application has lapsed