Electrochromic element, optical filter, lens unit, image pickup apparatus, and window member
US11661546B2 · kind B2 · utility
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1References
13Claims
0Family size
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Key dates
| Filing date | Apr 6, 2020 |
| Grant date | May 30, 2023 |
| Priority date | — |
| Expiry date | Jan 4, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/48
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
As an example of an EC element in which vertical color separation is suppressed, the present disclosure provides an EC element including a pair of electrodes, a solvent, an anodic EC compound, and a cathodic EC compound. In the EC element, the difference between a solvation free energy of an oxidized form of the anodic EC compound in water and a solvation free energy of the oxidized form in octanol is 35 kcal/mol or more, and the difference between a solvation free energy of a reduced form of the cathodic EC compound in propylene carbonate and a solvation free energy of the reduced form in octanol is −35 kcal/mol or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.