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US4490024A
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Multicomponent electrolyte with a definite potential and a display cell containing it
Assignee: Jaeger SA
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Filing: 1982-04-28
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Granted: 1984-12-25
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Expires: 2002-04-28
Abstract
Abstract A multicomponent electrolyte with a defined potential and a display cell containing it. The multicomponent, liquid electrolyte is based on at least one metal iodide dissolved in an anhydrous organic solvent, and is characterized in that it comprises three functional components: a first metallic element Mp yielding at least two iodides corresponding to different valences, and which is intended to ensure an equilibrium between the reduced forms of iodine I- and I3-; an iodide of a second metal Mt in a practically completely dissociated state, intended to fix the concentration of the anionic species I- in the electrolyte; and an iodide of a third metal Mx constituting the display vehicle.
Inventors
- 👤 Jean Pompei Katz de Warrens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:40
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1506
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
118 words
A multicomponent liquid electrolyte having a definite potential for electrolytic display cells, of the type based on at least one metal iodide dissolved in an anhydrous organic solvent, characterized in that it comprises the following three functional components: (a) a first metallic element M p , yielding at least two corresponding iodides of different valences for ensuring the equilibrium between the reduced forms of iodine I - and I 3 - ; (b) an iodide of a second metallic element M t , in a practically completely dissociated state, for fixing the concentration of the electrolyte in the anionic species I - , and (c) an iodide of a third metallic element M x constituting the display vehicle.
Claim 2
Dependent Claim
118 words
A multicomponent liquid electrolyte having a definite potential for electrolytic display cells, of the type based on at least one metal iodide dissolved in an anhydrous organic solvent, characterized in that it comprises the following three functional components: (a) a first metallic element M p , yielding at least two corresponding iodides of different valences for ensuring the equilibrium between the reduced forms of iodine I - and I 3 - ; (b) an iodide of a second metallic element M t , in a practically completely dissociated state, for fixing the concentration of the electrolyte in the anionic species I - , and (c) an iodide of a third metallic element M x constituting the display vehicle.
Claim 3
Dependent Claim
31 words
The electrolyte according to claim 1, wherein said element M p is selected from the group consisting of Tl, Cu, Hg, Au, Sn, Fe, Co, Ti, Cr, Mn, Sb and In.
Claim 4
Dependent Claim
30 words
The electrolyte according to claim 1 wherein said metallic element M t is selected from elements having a positive iodide ionization potential, in particular the alkali and alkaline earth metals.
Claim 5
Dependent Claim
37 words
The electrolyte according to claim 1 wherein said metallic element M x is selected from the group consisting of Zn, Cd, Tl, Pb, Cu, Ag, Hg, Au, Sn, Fe, Ni, Co, Ti, Cr, Mn, Sb and In.
Claim 6
Dependent Claim
66 words
The electrolyte according to claim 1, wherein a buffer equilibrium is established between the reduced species of iodine I - and I 3 - on the one hand, and between iodine and the oxidized species of the M p element on the other, so that the electric neutrality of said electrolyte is assured and its potential is fixed and independent of the nature of the electrodes.
Claim 7
Dependent Claim
66 words
The electrolyte according to claim 1 wherein the functional component M p is selected from the group consisting of Cr, In, Ti, Sn and Cu; the functional component M x is selected from the group consisting of Zn, Cd, Tl, Pb, Mn, Sb, Fe, Ni, Co, Ag, Hg and Au, and the functional component M t is selected from elements with a positive iodide ionization potential.
Claim 8
Dependent Claim
63 words
The electrolyte according to claim 1 wherein the functional component M p is selected from the group consisting of Mn, Au, Tl, Hg, Sb, Co, Fe; the functional component M x is selected from the group consisting of Zn, Cd, Ni, Co, Pb, Sn, In and Ti, and the functional component M t is selected from elements having a positive iodide ionization potential.
Claim 9
Dependent Claim
19 words
The electrolyte according to claim 5, wherein said buffer equilibrium is ensured by the presence of a reference electrode.
Claim 10
Dependent Claim
23 words
The electrolyte according to claim 5, wherein the weight ratio ω of the buffer equilibrium and the functional equilibrium is equal to unity.
Claim 11
Dependent Claim
22 words
An electrolytic display cell containing, as the electrolytic display medium, a multicomponent liquid electrolyte having a definite potential according to claim 1.
Claim 12
Dependent Claim
14 words
The display cell according to claim 10, wherein the electrolyte has a neutral potential.
Claim 13
Dependent Claim
29 words
The display cell according to claim 11, wherein said cell comprises a reference electrode made of a metal selected from the group consisting of Ag, Hg, Au and Pt.
Claim 14
Dependent Claim
49 words
The display cell according to claims 10, 11 or 12, wherein the standard obliterating potential of the reference electrode (d)° R is higher than or equal to the standard lettering potential of the element M x in the electrolyte, so as to confer a permanent memory on the cell.
Claim 15
Dependent Claim
31 words
The display cell according to claims 10, 11 or 12, wherein the multicomponent electrolyte comprises several different M x elements having different display colors, so as to ensure a multicolored display.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |