Sealing layers comprising a conductive filler for sealing microcells of electrophoretic displays
US12276894B2 · kind B2 · utility
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33References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 2, 2022 |
| Grant date | Apr 15, 2025 |
| Priority date | — |
| Expiry date | Nov 8, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to a sealing layer that comprises a poly(vinyl alcohol) homopolymer or a poly(vinyl alcohol-co-ethylene) copolymer, a polyurethane, and a conductive filler. The sealing layer shows good barrier properties to a non-polar fluid. The sealing layer can be used to seal microcells of electro-optic devices, contributing to improved good electro-optic performance of the device, especially at low temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.