Droplet interfaces in electro-wetting devices
US11534763B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 21, 2018 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | Jan 8, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L2400/0427
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Droplet interfaces are formed between droplets in an electro-wetting device comprising an array of actuation electrodes. Actuation signals are applied to selected actuation electrodes to place the droplets into an energised state in which the shape of the droplets is modified compared to a shape of the droplets in a lower energy state and to bring the two droplets into proximity. The actuation signals are then changed to lower the energy of the droplets into the lower energy state so that the droplets relax into the gap and the two droplets contact each other thereby forming a droplet interface. The use of sensing electrodes in the device permit electrical current measurements across the droplet interface. The sensing electrodes can be used for either (i) applying a reference signal during droplet actuation or (ii) recording electrical current measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.