Display element

• US 20050213186A1
• Filed: 03/11/2005
• Published: 09/29/2005
• Est. Priority Date: 03/26/2004
• Status: Active Grant

• Current Assignee: Konica Minolta Holdings Incorporated (Konica Minolta Inc.)
• Original Assignee: Konica Minolta Holdings Incorporated (Konica Minolta Inc.)
• Inventors: Kokeguchi, Noriyuki, Ikesu, Satoru
• Granted Patent: US 7,324,259 B2
• Time in Patent Office: Days
• US Class Current: 359/265
• CPC Class Codes: C09K 15/02 containing inorganic compounds
• CPC Class Codes: C09K 15/08 containing a phenol or quinone moiety
• CPC Class Codes: C09K 15/10 containing sulfur
• CPC Class Codes: C09K 15/18 containing an amine or imine moiety
• CPC Class Codes: G02F 1/1506 caused by electrodeposition, e.g. electrolytic deposition of an inorganic material on or close to an electrode

Abstract

A display element comprising a pair of electrodes having therebetween an electrolyte layer containing silver or a silver-containing compound, the display element being driven by the pair of electrodes so as to electrochemically dissolve silver or to electrochemically deposit silver, wherein the electrolyte layer contains an antioxidant selected from the group consisting of a phenolic antioxidant, a phosphoric acid antioxidant, a sulfur-containing antioxidant, an amine antioxidant and a hydroquinone derivative.

Claims

1. A display element comprising a pair of electrodes having therebetween an electrolyte layer containing silver or a silver-containing compound, the display element being driven by the pair of electrodes so as to electrochemically dissolve silver or to electrochemically deposit silver,

wherein the electrolyte layer contains an antioxidant selected from the group consisting of a phenolic antioxidant, a phosphoric acid antioxidant, a sulfur-containing antioxidant, an amine antioxidant and a hydroquinone derivative.

4. The display element of claim 1, wherein the electrolyte layer further contains a compound having a mercapto group and the electrolyte layer satisfies Formula (3):

2≦

[—

SH]/[Ag]≦

10  

 

Formula (3)

wherein;

[—

SH] represents a total number of moles of sulfur contained in the compound having a mercapto group; and

[Ag] represents a total number of moles of silver contained in the electrolyte layer.

5. The display element of claim 1, wherein the electrolyte layer further contains a solvent selected from the group consisting of:

propylene carbonate, ethylene carbonate, ethylmethyl carbonate, diethyl carbonate, dimethyl carbonate, butylene carbonate, γ

-butyrolactone, tetramethylurea, sulfolane, dimethyl sulfoxide, 1,3-dimethyl-2-imidazolidinone, 2-(N-methyl)-2-pyrrolidinone, hexamethylphosphortriamide, N-methylpropione amide, N,N-dimethylacetamide, N-methylacetamide, N,N-dimethylformamide, N-methylformamide, butyronitrile, propionitrile, acetonitrile, acetylacetone, 4-methyl-2-pentanone, 2-butanol, 1-butanol, 2-propanol, 1-propanol, ethanol, methanol, an acetic anhydride, ethylacetate, ethyl propionate, dimethoxy ethane, diethoxyfuran, tetrahydrofuran, ethylene glycol, diethylene glycol, triethylene glycol monobutyl ether, and water.

6. The display element of claim 1, wherein the electrolyte layer further contains white particles.

7. The display element of claim 1, wherein the electrolyte layer further contains a thickener selected from the group consisting of:

polyvinyl alcohol, hydroxypropyl cellulose, polyalkylene glycol and polyvinyl pirrolidone.

8. The display element of claim 1, wherein one of the pair of electrodes is a metal electrode.

9. The display element of claim 1, wherein one of the pair of electrodes is a transparent electrode.

10. The display element of claim 1, wherein a display element operation is simple matrix drive.

2. A display element comprising a pair of electrodes having therebetween an electrolyte layer containing silver or a silver compound, the display element being driven by the pair of electrodes so as to electrochemically dissolve silver or to electrochemically deposit silver,

wherein the electrolyte layer contains a compound represented by Formula (1) or Formula (2):

wherein in Formula (1) and Formula (2);

R⁵¹-R⁵⁴ each represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, or a heterocycle group;

R⁵⁵-R⁵⁹ each represents a hydrogen atom, a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, a heterocycle group, an alkoxy group, a cycloalkyloxy group, an aryloxy group, a heterocyclicoxy group, a silyloxy group, an acyloxy group, an amino group, an anilino group, a heterocyclic amino group, an alkylthio group, an arylthio group, a heterocyclicthio group, a silyl group, a hydroxyl group, a nitro group, an alkoxycarbonyloxy group, a cycloalkyloxycarbonyloxy group, an aryloxycarbonyloxy group, a carbamoyloxy group, a sulfamoyloxy group, an alkanesulfonyloxy group, an arenesulfonyloxy group, an acyl group, an alkoxycarbonyl group, a cycloalkyloxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, a carbonamido group, a ureido group, an imido group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfonamido group, a sulfamoylamino group, an alkylsulfinyl group, an arenesulfinyl group, an alkanesulfonyl group, an arenesulfonyl group, a sulfamoyl group, a sulfo group, a phosphinoyl group, or a phosphinoylamino group;

q represents a integer of 0 to 5, and when q is two or more, each R⁵⁵ may be different; and

R⁶⁰ represents an alkyl group or an aryl group.

11. The display element of claim 2, wherein the electrolyte layer further contains a compound having a mercapto group, provided that Formula (3) is satisfied:

2≦

[—

SH]/[Ag]≦

10  

 

Formula (3)

wherein;

[—

SH] represents a total number of moles of sulfur contained in the compound having a mercapto group; and

[Ag] represents a total number of moles of silver contained in the electrolyte layer.

12. The display element of claim 2, wherein the electrolyte layer further contains a solvent selected from the group consisting of:

propylene carbonate, ethylene carbonate, ethylmethyl carbonate, diethyl carbonate, dimethyl carbonate, butylenes carbonate, γ

-butyrolactone, tetramethylurea, sulfolan, dimethyl sulfoxide, l,3-dimethyl-2-imidazolidinone, 2-(N-methyl)-2-pyrrolidinone, hexamethylphosphortriamide, N-methyl propione amide, N,N-dimethylacetamide, N-methylacetamide, N,N-dimethylformamide, N-methylformamide, butyronitrile, propionitrile, acetonitrile, acetylacetone, 4-methyl-2-pentanone, 2-butanol, 1-butanol, 2-propanol, 1-propanol, ethanol, methanol, acetic anhydride, ethyl acetate, ethyl propionate, dimethoxy ethane, diethoxyfuran, tetrahydrofuran, ethylene glycol, diethylene glycol, tri ethylene glycol monobutyl ether, and water.

13. The display element of claim 2, wherein the electrolyte layer further contains white particles.

14. The display element of claim 2, wherein the electrolyte layer further contains a thickener selected from the group consisting of:

polyvinyl alcohol, hydroxypropyl cellulose, polyalkylene glycol and polyvinyl pirrolidone.

15. The display element of claim 2, wherein one of the pair of electrodes is a metal electrode.

16. The display element of claim 2, wherein one of the pair of electrodes is a transparent electrode.

17. The display element of claim 2, wherein a display element operation is simple matrix drive.

3. A display element comprising a pair of electrodes having therebetween an electrolyte layer containing silver or a silver compound, the display element being driven by the pair of electrodes so as to electrochemically dissolve silver or to electrochemically deposit silver,

wherein the electrolyte layer contains a dehydration agent.

18. The display element of claim 3, wherein the electrolyte layer further contains a compound having a mercapto group, provided that Formula (3) is satisfied:

2≦

[—

SH]/[Ag]≦

10  

 

Formula (3)

wherein;

[—

SH] represents a total number of moles of sulfur contained in the compound having a mercapto group; and

[Ag] represents a total number of moles of silver contained in the electrolyte layer.

19. The display element of claim 3, wherein the electrolyte layer further contains a solvent selected from the group consisting of:

propylene carbonate, ethylene carbonate, ethylmethyl carbonate, diethyl carbonate, dimethyl carbonate, butylenes carbonate, γ

-butyrolactone, tetramethylurea, sulfolan, dimethyl sulfoxide, 1,3-dimethyl-2-imidazolidinone, 2-(N-methyl)-2-pyrrolidinone, hexamethylphosphortriamide, N-methyl propione amide, N,N-dimethylacetamide, N-methylacetamide, N,N-dimethylformamide, N-methylformamide, butyronitrile, propionitrile, acetonitrile, acetylacetone, 4-methyl-2-pentanone, 2-butanol, 1-butanol, 2-propanol, 1-propanol, ethanol, methanol, acetic anhydride, ethyl acetate, ethyl propionate, dimethoxy ethane, diethoxyfuran, tetrahydrofuran, ethylene glycol, diethylene glycol, tri ethylene glycol monobutyl ether, and water.

20. The display element of claim 3, wherein the electrolyte layer further contains white particles.

21. The display element of claim 3, wherein the electrolyte layer further contains a thickener selected from the group consisting of:

polyvinyl alcohol, hydroxypropyl cellulose, polyalkylene glycol and polyvinyl pirrolidone.

22. The display element of claim 3, wherein one of the pair of electrodes is a metal electrode.

23. The display element of claim 3, wherein one of the pair of electrodes is a transparent electrode.

24. The display element of claim 3, wherein a display element operation is simple matrix drive.