Electrolyte for electrochromic display device
First Claim
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1. In an electrochromic display device which comprises a display electrode, an anode, and an aqueous electrolyte solution disposed therebetween which produces a display effect by electrodeposition of a colored species from the electrolyte onto the display electrode as a result of a redox reaction, the improvement according to which the electrolyte comprises an anion which is either hypophosphite or phosphite and a cation which has a bipyridinium structure.
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Abstract
Improved performance is achieved in electrochromic display devices comprising an oxidation-reduction system and an electrolyte wherein the electrolyte comprises hypophosphite anions, phosphite anions, or both.
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7 Claims
- 1. In an electrochromic display device which comprises a display electrode, an anode, and an aqueous electrolyte solution disposed therebetween which produces a display effect by electrodeposition of a colored species from the electrolyte onto the display electrode as a result of a redox reaction, the improvement according to which the electrolyte comprises an anion which is either hypophosphite or phosphite and a cation which has a bipyridinium structure.
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Current AssigneeInternational Business Machines Corporation
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Original AssigneeInternational Business Machines Corporation
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InventorsBarclay, Donald J.
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Primary Examiner(s)Gron, Teddy S.
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Application NumberUS05/935,399Time in Patent Office533 DaysField of Search350/357, 252/408US Class Current359/265CPC Class CodesG02F 1/1503 caused by oxidation-reducti...
