Electro-optical device and electro-optical light controlling device

• US 4,435,048 A
• Filed: 04/14/1981
• Issued: 03/06/1984
• Est. Priority Date: 04/15/1980
• Status: Expired due to Term

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Nagai, Junichi, Mizuhashi, Mamoru, Kamimori, Tadatoshi
• Primary Examiner(s): Niebling, John F.
• Application Number:
  US06/254,104
• Time in Patent Office: 1,057 Days
• Field of Search: 252/62.2, 350/357
• US Class Current: 359/275
• CPC Class Codes: G02F 1/1525 characterised by a particular ion transporting layer, e.g. electrolyte

Abstract

An electro-optical device comprising an electrolyte layer held between a pair of electrodes and an electrochromic material placed on at least one of said electrodes, wherein said electrolyte layer comprises an organic material and a chelating agent and an electro-optical light controlling device comprising an electrolyte layer held between a pair of transmissive electrodes and an electrochromic material placed on at least one of said electrodes; wherein said electrolyte layer comprises a non-liquid material of an adhesive or tacky high polymer and a material having coordinating function to a metal.

Claims

1. An electro-optical device comprising non-solid electrolyte layer held between a pair of electrodes and a solid electrochromic material placed on at least one of said electrodes, said electrolyte layer comprising an organic material and a chelating agent, wherein said electrolyte layer further comprises iodine or an iodine compound selected from the group consisting of metal or ammonium iodides, C₁ -C₄ iodine-containing carboxylic acids, C₁ -C₄ alkyl iodides and chromatic iodo compounds, in an amount of from 5×

10^-3 mole/liter up to saturation level.

2. The electro-optical device according to claim 1 wherein said electrolyte layer comprises a bleaching stabilizer of a chlorine-containing lower carboxylic acid or a bromine compound.

3. The electro-optical device according to claim 1 wherein said chelating agent is a sulfur-containing compound.

4. An electro-optical light controlling device comprising a semi-solid electrolyte layer held between a pair of light-transmissive electrodes and a solid electrochromic material placed on at least one of said electrodes, said semi-solid electrolyte comprising an organic material and a compound having a coordination function to the metal of the electrode, a non-liquid adhesive high polymer whereby the electrolyte layer adheres to the electrodes, and iodine or an iodine compound selected from the group consisting of metal or ammonium iodides, C₁ -C₄ iodine-containing carboxylic acids, C₁ -C₄ alkyl iodides and aromatic iodo compounds, in an amount of from 5×

10^-3 mole/liter up to saturation level.

5. The electro-optical light controlling device of claim 4, wherein said coordinating compound is a chelating agent.

6. The electro-optical light controlling device of claim 4, wherein said adhesive high polymer is a polyvinyl acetal resin.

7. The electro-optical device of claim 4, wherein said adhesive high polymer is a polyvinyl butyral resin.

8. The electro-optical light controlling device of claim 4, wherein said electrolyte layer further comprises a bleaching stabilizer of a chlorine-containing lower carboxylic acid or a bromine compound.

9. The electro-optical light controlling device of claim 4, wherein said chelating agent is a sulfur-containing material.