Processes for the production of electrophoretic displays
US7910175B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2007 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Feb 10, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/16757
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A coating of an encapsulated electrophoretic medium is formed on a substrate (106) by dispersing in a fluid (104) a plurality of electrophoretic capsules (102), contacting at least a portion of a substrate (106) with the fluid (104); and applying a potential difference between at least a part of the portion of the substrate (106) contacting the fluid (104) and a counter-electrode (110) in electrical contact with the fluid (104), thereby causing capsules (102) to be deposited upon at least part of the portion of the substrate (106) contacting the fluid (102). Patterned coatings of capsules containing different colors may be deposited in registration with electrodes using multiple capsule deposition steps. Alternatively, patterned coatings of capsules may be formed by applying a fluid form of an electrophoretic medium to a substrate, and applying a temporally varying voltage between an electrode and the substrate. The process may be repeated to allow for deposition of full color displays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.