Patent ID: 7751111

Claim:
A display element comprising opposing electrodes having therebetween an electrolyte containing silver or a compound having silver in the chemical structure, wherein the opposing electrodes are driven by a drive circuit disposed for each of pixels so that the silver is dissolved and deposited and the opposing electrodes are provided on a plane separate from the drive circuit, and the electrolyte comprises at least one compound represented by formula (1) or (2) and at least one compound represented by formula (3) or (4): wherein L is an oxygen atom or CH 2 ; R 1 through R 4 are each a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, a cycloalkyl group, an alkoxyalkyl group or an alkoxy group; wherein R 5 and R 6 are each a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, a cycloalkyl group, an alkoxyalkyl group or an alkoxy group; R 7 —S—R 8 formula (3) wherein R 7 and R 8 are each a substituted or unsubstituted hydrocarbon group, or R 7 or R 8 combine with each other to form a nonaromatic S-containing ring, provided that atoms adjacent to S are not S; wherein M is a hydrogen atom, a metal atom or a quaternary ammonium; Z represents a nitrogen-containing heterocyclic ring; n is an integer of 0 to 5; R 9 is a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkylcarbonamido group, an arylcarbonamido group, an alkylsulfonamido group, an arylsulfonamido group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an alkylcarbamoyl group, an arylcarbamoyl group, a carbamoyl group, an alkylsulfamoyl group, an arylsulfamoyl group, a sulfamoyl group, a cyano group, an alkylsulfonyl group, an arylsulfonyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylcarbonyl group, an arylcarbonyl group, an acyloxycarbonyl group, a carboxyl group, a carbonyl group, a sulfonyl group, an amino group, a hydroxy group or a heterocyclic group, provided that when n is 2 or more, R 9 s may be the same or different or may combine to form a condensed ring.