Electronic whiteboard using electrophoretic display
US6831771B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2003 |
| Grant date | Dec 14, 2004 |
| Priority date | — |
| Expiry date | Jan 11, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/094
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is directed to a display device which includes an array of sealed microcups containing particles of a designated electric and magnetic characteristic suspended in a solvent wherein a surface of a plurality of the sealed microcups constituting a transparent surface. The display device further includes an electromagnetic image writing/drawing pen for manually applying an electromagnetic field on the particles of the designated electric and magnetic characteristic in the microcups to form an image viewable from the transparent surface. More particularly, the particles of the designated electric and magnetic characteristic are charged particles and the writing and drawing pen is an electrical writing/drawing pen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.