Non-aqueous conductive liquids for liquid lenses
US9939630B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2015 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Aug 6, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49002
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrowetting optical device having a non-aqueous conductive liquid and a non-conductive liquid, the liquids being non-miscible, and a dielectric enclosure on which both liquids are in contact and form a triple interface. The non-aqueous conductive liquid includes a non-ionic polar organic solvent, and at least 2 weight % of a first compound, where the first compound is non-aqueous and is either ionic or non-ionic. If the first compound is non-ionic, the first compound is more polar than the solvent, the polarity of the non-ionic first compound being measured by Hansen parameters, a sum of the Hansen parameter for polarity (δp) and of the Hansen parameter for hydrogen bonding (δh) being higher than the sum of the corresponding Hansen parameters of the non-ionic polar organic solvent, and the non-aqueous conductive liquid having an ionic second compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.